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--- dyld/dyld-96.2/src/dyld.cpp
+++ dyld/dyld-421.2/src/dyld.cpp
@@ -1,6 +1,6 @@
/* -*- mode: C++; c-basic-offset: 4; tab-width: 4 -*-
*
- * Copyright (c) 2004-2007 Apple Inc. All rights reserved.
+ * Copyright (c) 2004-2013 Apple Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
@@ -27,18 +27,71 @@
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
+#include <dirent.h>
+#include <pthread.h>
+#include <libproc.h>
#include <sys/param.h>
#include <mach/mach_time.h> // mach_absolute_time()
+#include <mach/mach_init.h>
#include <sys/types.h>
#include <sys/stat.h>
-#include <mach-o/fat.h>
+#include <sys/syscall.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <sys/syslog.h>
+#include <sys/uio.h>
+#include <mach-o/fat.h>
#include <mach-o/loader.h>
#include <mach-o/ldsyms.h>
#include <libkern/OSByteOrder.h>
+#include <libkern/OSAtomic.h>
#include <mach/mach.h>
#include <sys/sysctl.h>
#include <sys/mman.h>
#include <sys/dtrace.h>
+#include <libkern/OSAtomic.h>
+#include <Availability.h>
+#include <System/sys/codesign.h>
+#include <System/sys/csr.h>
+#include <_simple.h>
+#include <os/lock_private.h>
+#include <System/machine/cpu_capabilities.h>
+#include <System/sys/reason.h>
+#include <kern/kcdata.h>
+#include <sandbox.h>
+#include <sandbox/private.h>
+
+#include <array>
+
+#ifndef CPU_SUBTYPE_ARM_V5TEJ
+ #define CPU_SUBTYPE_ARM_V5TEJ ((cpu_subtype_t) 7)
+#endif
+#ifndef CPU_SUBTYPE_ARM_XSCALE
+ #define CPU_SUBTYPE_ARM_XSCALE ((cpu_subtype_t) 8)
+#endif
+#ifndef CPU_SUBTYPE_ARM_V7
+ #define CPU_SUBTYPE_ARM_V7 ((cpu_subtype_t) 9)
+#endif
+#ifndef CPU_SUBTYPE_ARM_V7F
+ #define CPU_SUBTYPE_ARM_V7F ((cpu_subtype_t) 10)
+#endif
+#ifndef CPU_SUBTYPE_ARM_V7S
+ #define CPU_SUBTYPE_ARM_V7S ((cpu_subtype_t) 11)
+#endif
+#ifndef CPU_SUBTYPE_ARM_V7K
+ #define CPU_SUBTYPE_ARM_V7K ((cpu_subtype_t) 12)
+#endif
+#ifndef LC_DYLD_ENVIRONMENT
+ #define LC_DYLD_ENVIRONMENT 0x27
+#endif
+
+#ifndef CPU_SUBTYPE_X86_64_H
+ #define CPU_SUBTYPE_X86_64_H ((cpu_subtype_t) 8)
+#endif
+
+#ifndef VM_PROT_SLIDE
+ #define VM_PROT_SLIDE 0x20
+#endif
#include <vector>
#include <algorithm>
@@ -49,44 +102,70 @@
#include "ImageLoader.h"
#include "ImageLoaderMachO.h"
#include "dyldLibSystemInterface.h"
+#if DYLD_SHARED_CACHE_SUPPORT
#include "dyld_cache_format.h"
-
-// from _simple.h in libc
-typedef struct _SIMPLE* _SIMPLE_STRING;
-extern "C" void _simple_vdprintf(int __fd, const char *__fmt, va_list __ap);
-extern "C" void _simple_dprintf(int __fd, const char *__fmt, ...);
-extern "C" _SIMPLE_STRING _simple_salloc(void);
-extern "C" int _simple_vsprintf(_SIMPLE_STRING __b, const char *__fmt, va_list __ap);
-extern "C" void _simple_sfree(_SIMPLE_STRING __b);
-extern "C" char * _simple_string(_SIMPLE_STRING __b);
-
-
-
-// 32-bit ppc is only architecture that uses cpu-sub-types
-#define CPU_SUBTYPES_SUPPORTED __ppc__
-
-
-#define OLD_GDB_DYLD_INTERFACE __ppc__ || __i386__
+#endif
+#include "dyld_process_info_internal.h"
+#include <coreSymbolicationDyldSupport.h>
+#if TARGET_IPHONE_SIMULATOR
+ extern "C" void xcoresymbolication_load_notifier(void *connection, uint64_t load_timestamp, const char *image_path, const struct mach_header *mach_header);
+ extern "C" void xcoresymbolication_unload_notifier(void *connection, uint64_t unload_timestamp, const char *image_path, const struct mach_header *mach_header);
+ #define coresymbolication_load_notifier(c, t, p, h) xcoresymbolication_load_notifier(c, t, p, h)
+ #define coresymbolication_unload_notifier(c, t, p, h) xcoresymbolication_unload_notifier(c, t, p, h)
+#endif
+
+#if SUPPORT_ACCELERATE_TABLES
+ #include "ImageLoaderMegaDylib.h"
+#endif
+
+#if TARGET_IPHONE_SIMULATOR
+ extern "C" void* gSyscallHelpers;
+#else
+ #include "dyldSyscallInterface.h"
+#endif
+
+
+// not libc header for send() syscall interface
+extern "C" ssize_t __sendto(int, const void *, size_t, int, const struct sockaddr *, socklen_t);
+
+
+// ARM and x86_64 are the only architecture that use cpu-sub-types
+#define CPU_SUBTYPES_SUPPORTED ((__arm__ || __x86_64__) && !TARGET_IPHONE_SIMULATOR)
+
+#if __LP64__
+ #define LC_SEGMENT_COMMAND LC_SEGMENT_64
+ #define LC_SEGMENT_COMMAND_WRONG LC_SEGMENT
+ #define LC_ENCRYPT_COMMAND LC_ENCRYPTION_INFO
+ #define macho_segment_command segment_command_64
+ #define macho_section section_64
+#else
+ #define LC_SEGMENT_COMMAND LC_SEGMENT
+ #define LC_SEGMENT_COMMAND_WRONG LC_SEGMENT_64
+ #define LC_ENCRYPT_COMMAND LC_ENCRYPTION_INFO_64
+ #define macho_segment_command segment_command
+ #define macho_section section
+#endif
+
#define CPU_TYPE_MASK 0x00FFFFFF /* complement of CPU_ARCH_MASK */
/* implemented in dyld_gdb.cpp */
+extern void resetAllImages();
extern void addImagesToAllImages(uint32_t infoCount, const dyld_image_info info[]);
extern void removeImageFromAllImages(const mach_header* mh);
-#if OLD_GDB_DYLD_INTERFACE
-extern void addImageForgdb(const mach_header* mh, uintptr_t slide, const char* physicalPath, const char* logicalPath);
-extern void removeImageForgdb(const struct mach_header* mh);
-#endif
+extern void addNonSharedCacheImageUUID(const dyld_uuid_info& info);
+extern const char* notifyGDB(enum dyld_image_states state, uint32_t infoCount, const dyld_image_info info[]);
+extern size_t allImagesCount();
// magic so CrashReporter logs message
extern "C" {
char error_string[1024];
}
-// implemented in dyldStartup.s for CrashReporter
-extern "C" void dyld_fatal_error(const char* errString) __attribute__((noreturn));
-
+
+// magic linker symbol for start of dyld binary
+extern "C" const macho_header __dso_handle;
//
@@ -97,7 +176,19 @@
//
//
//
-
+namespace dyld {
+ struct RegisteredDOF { const mach_header* mh; int registrationID; };
+ struct DylibOverride { const char* installName; const char* override; };
+}
+
+
+VECTOR_NEVER_DESTRUCTED(ImageLoader*);
+VECTOR_NEVER_DESTRUCTED(dyld::RegisteredDOF);
+VECTOR_NEVER_DESTRUCTED(dyld::ImageCallback);
+VECTOR_NEVER_DESTRUCTED(dyld::DylibOverride);
+VECTOR_NEVER_DESTRUCTED(ImageLoader::DynamicReference);
+
+VECTOR_NEVER_DESTRUCTED(dyld_image_state_change_handler);
namespace dyld {
@@ -110,16 +201,21 @@
const char* const * DYLD_FALLBACK_FRAMEWORK_PATH;
const char* const * DYLD_LIBRARY_PATH;
const char* const * DYLD_FALLBACK_LIBRARY_PATH;
- const char* const * DYLD_ROOT_PATH;
const char* const * DYLD_INSERT_LIBRARIES;
const char* const * LD_LIBRARY_PATH; // for unix conformance
- bool DYLD_PRINT_LIBRARIES;
+ const char* const * DYLD_VERSIONED_LIBRARY_PATH;
+ const char* const * DYLD_VERSIONED_FRAMEWORK_PATH;
bool DYLD_PRINT_LIBRARIES_POST_LAUNCH;
bool DYLD_BIND_AT_LAUNCH;
bool DYLD_PRINT_STATISTICS;
+ bool DYLD_PRINT_STATISTICS_DETAILS;
bool DYLD_PRINT_OPTS;
bool DYLD_PRINT_ENV;
bool DYLD_DISABLE_DOFS;
+ bool DYLD_PRINT_CS_NOTIFICATIONS;
+ // DYLD_SHARED_CACHE_DONT_VALIDATE ==> sSharedCacheIgnoreInodeAndTimeStamp
+ // DYLD_SHARED_CACHE_DIR ==> sSharedCacheDir
+ // DYLD_ROOT_PATH ==> gLinkContext.rootPaths
// DYLD_IMAGE_SUFFIX ==> gLinkContext.imageSuffix
// DYLD_PRINT_OPTS ==> gLinkContext.verboseOpts
// DYLD_PRINT_ENV ==> gLinkContext.verboseEnv
@@ -127,6 +223,7 @@
// DYLD_PRINT_INITIALIZERS ==> gLinkContext.verboseInit
// DYLD_PRINT_SEGMENTS ==> gLinkContext.verboseMapping
// DYLD_PRINT_BINDINGS ==> gLinkContext.verboseBind
+ // DYLD_PRINT_WEAK_BINDINGS ==> gLinkContext.verboseWeakBind
// DYLD_PRINT_REBASINGS ==> gLinkContext.verboseRebase
// DYLD_PRINT_DOFS ==> gLinkContext.verboseDOF
// DYLD_PRINT_APIS ==> gLogAPIs
@@ -135,97 +232,348 @@
// DYLD_NEW_LOCAL_SHARED_REGIONS ==> gLinkContext.sharedRegionMode
// DYLD_SHARED_REGION ==> gLinkContext.sharedRegionMode
// DYLD_PRINT_WARNINGS ==> gLinkContext.verboseWarnings
+ // DYLD_PRINT_RPATHS ==> gLinkContext.verboseRPaths
+ // DYLD_PRINT_INTERPOSING ==> gLinkContext.verboseInterposing
+ // DYLD_PRINT_LIBRARIES ==> gLinkContext.verboseLoading
};
+
+
typedef std::vector<dyld_image_state_change_handler> StateHandlers;
-struct RegisteredDOF { const mach_header* mh; int registrationID; };
-
+
+
+enum EnvVarMode { envNone, envPrintOnly, envAll };
+
// all global state
static const char* sExecPath = NULL;
-static const struct mach_header* sMainExecutableMachHeader = NULL;
+static const char* sExecShortName = NULL;
+static const macho_header* sMainExecutableMachHeader = NULL;
+#if CPU_SUBTYPES_SUPPORTED
static cpu_type_t sHostCPU;
static cpu_subtype_t sHostCPUsubtype;
-static ImageLoader* sMainExecutable = NULL;
-static bool sMainExecutableIsSetuid = false;
-static unsigned int sInsertedDylibCount = 0;
+#endif
+static ImageLoaderMachO* sMainExecutable = NULL;
+static EnvVarMode sEnvMode = envNone;
+static size_t sInsertedDylibCount = 0;
static std::vector<ImageLoader*> sAllImages;
static std::vector<ImageLoader*> sImageRoots;
static std::vector<ImageLoader*> sImageFilesNeedingTermination;
static std::vector<RegisteredDOF> sImageFilesNeedingDOFUnregistration;
-#if IMAGE_NOTIFY_SUPPORT
-static std::vector<ImageLoader*> sImagesToNotifyAboutOtherImages;
-#endif
static std::vector<ImageCallback> sAddImageCallbacks;
static std::vector<ImageCallback> sRemoveImageCallbacks;
-static StateHandlers sSingleHandlers[7];
-static StateHandlers sBatchHandlers[7];
+static bool sRemoveImageCallbacksInUse = false;
+static void* sSingleHandlers[7][3];
+static void* sBatchHandlers[7][3];
static ImageLoader* sLastImageByAddressCache;
static EnvironmentVariables sEnv;
+#if __MAC_OS_X_VERSION_MIN_REQUIRED
static const char* sFrameworkFallbackPaths[] = { "$HOME/Library/Frameworks", "/Library/Frameworks", "/Network/Library/Frameworks", "/System/Library/Frameworks", NULL };
static const char* sLibraryFallbackPaths[] = { "$HOME/lib", "/usr/local/lib", "/usr/lib", NULL };
-static BundleNotificationCallBack sBundleNotifier = NULL;
-static BundleLocatorCallBack sBundleLocation = NULL;
+#else
+static const char* sFrameworkFallbackPaths[] = { "/System/Library/Frameworks", NULL };
+static const char* sLibraryFallbackPaths[] = { "/usr/local/lib", "/usr/lib", NULL };
+#endif
+static const char* sRestrictedFrameworkFallbackPaths[] = { "/System/Library/Frameworks", NULL };
+static const char* sRestrictedLibraryFallbackPaths[] = { "/usr/lib", NULL };
static UndefinedHandler sUndefinedHandler = NULL;
static ImageLoader* sBundleBeingLoaded = NULL; // hack until OFI is reworked
#if DYLD_SHARED_CACHE_SUPPORT
static const dyld_cache_header* sSharedCache = NULL;
-bool gSharedCacheNotFound = false;
-bool gSharedCacheNeedsUpdating = false;
-bool gSharedCacheDontNotify = false;
+static long sSharedCacheSlide = 0;
+static bool sSharedCacheIgnoreInodeAndTimeStamp = false;
+ bool gSharedCacheOverridden = false;
+#if __IPHONE_OS_VERSION_MIN_REQUIRED
+ static const char* sSharedCacheDir = IPHONE_DYLD_SHARED_CACHE_DIR;
+ #define ENABLE_DYLIBS_TO_OVERRIDE_CACHE_SIZE 1024
+#else
+ static const char* sSharedCacheDir = MACOSX_DYLD_SHARED_CACHE_DIR;
+#endif
#endif
ImageLoader::LinkContext gLinkContext;
bool gLogAPIs = false;
+#if SUPPORT_ACCELERATE_TABLES
+bool gLogAppAPIs = false;
+#endif
const struct LibSystemHelpers* gLibSystemHelpers = NULL;
#if SUPPORT_OLD_CRT_INITIALIZATION
bool gRunInitializersOldWay = false;
#endif
-#if __i386__
-static uint32_t sImportSegmentsStart = 0;
-static uint32_t sImportSegmentsSize = 0;
-#endif
+static std::vector<DylibOverride> sDylibOverrides;
+#if !TARGET_IPHONE_SIMULATOR
+static int sLogSocket = -1;
+#endif
+static bool sFrameworksFoundAsDylibs = false;
+#if __x86_64__ && DYLD_SHARED_CACHE_SUPPORT
+static bool sHaswell = false;
+#endif
+static std::vector<ImageLoader::DynamicReference> sDynamicReferences;
+static OSSpinLock sDynamicReferencesLock = 0;
+#if !TARGET_IPHONE_SIMULATOR
+static bool sLogToFile = false;
+#endif
+static char sLoadingCrashMessage[1024] = "dyld: launch, loading dependent libraries";
+
+static _dyld_objc_notify_mapped sNotifyObjCMapped;
+static _dyld_objc_notify_init sNotifyObjCInit;
+static _dyld_objc_notify_unmapped sNotifyObjCUnmapped;
+
+#if __IPHONE_OS_VERSION_MIN_REQUIRED && !TARGET_IPHONE_SIMULATOR
+static bool sForceStderr = false;
+#endif
+
+
+
+#if SUPPORT_ACCELERATE_TABLES
+static ImageLoaderMegaDylib* sAllCacheImagesProxy = NULL;
+static bool sDisableAcceleratorTables = false;
+#endif
+
+//
+// The MappedRanges structure is used for fast address->image lookups.
+// The table is only updated when the dyld lock is held, so we don't
+// need to worry about multiple writers. But readers may look at this
+// data without holding the lock. Therefore, all updates must be done
+// in an order that will never cause readers to see inconsistent data.
+// The general rule is that if the image field is non-NULL then
+// the other fields are valid.
+//
+struct MappedRanges
+{
+ MappedRanges* next;
+ unsigned long count;
+ struct {
+ ImageLoader* image;
+ uintptr_t start;
+ uintptr_t end;
+ } array[1];
+};
+
+static MappedRanges* sMappedRangesStart;
+
+void addMappedRange(ImageLoader* image, uintptr_t start, uintptr_t end)
+{
+ //dyld::log("addMappedRange(0x%lX->0x%lX) for %s\n", start, end, image->getShortName());
+ for (MappedRanges* p = sMappedRangesStart; p != NULL; p = p->next) {
+ for (unsigned long i=0; i < p->count; ++i) {
+ if ( p->array[i].image == NULL ) {
+ p->array[i].start = start;
+ p->array[i].end = end;
+ // add image field last with a barrier so that any reader will see consistent records
+ OSMemoryBarrier();
+ p->array[i].image = image;
+ return;
+ }
+ }
+ }
+ // table must be full, chain another
+#if SUPPORT_ACCELERATE_TABLES
+ unsigned count = (sAllCacheImagesProxy != NULL) ? 16 : 400;
+#else
+ unsigned count = 400;
+#endif
+ size_t allocationSize = sizeof(MappedRanges) + (count-1)*3*sizeof(void*);
+ MappedRanges* newRanges = (MappedRanges*)malloc(allocationSize);
+ bzero(newRanges, allocationSize);
+ newRanges->count = count;
+ newRanges->array[0].start = start;
+ newRanges->array[0].end = end;
+ newRanges->array[0].image = image;
+ OSMemoryBarrier();
+ if ( sMappedRangesStart == NULL ) {
+ sMappedRangesStart = newRanges;
+ }
+ else {
+ for (MappedRanges* p = sMappedRangesStart; p != NULL; p = p->next) {
+ if ( p->next == NULL ) {
+ OSMemoryBarrier();
+ p->next = newRanges;
+ break;
+ }
+ }
+ }
+}
+
+void removedMappedRanges(ImageLoader* image)
+{
+ for (MappedRanges* p = sMappedRangesStart; p != NULL; p = p->next) {
+ for (unsigned long i=0; i < p->count; ++i) {
+ if ( p->array[i].image == image ) {
+ // clear with a barrier so that any reader will see consistent records
+ OSMemoryBarrier();
+ p->array[i].image = NULL;
+ }
+ }
+ }
+}
+
+ImageLoader* findMappedRange(uintptr_t target)
+{
+ for (MappedRanges* p = sMappedRangesStart; p != NULL; p = p->next) {
+ for (unsigned long i=0; i < p->count; ++i) {
+ if ( p->array[i].image != NULL ) {
+ if ( (p->array[i].start <= target) && (target < p->array[i].end) )
+ return p->array[i].image;
+ }
+ }
+ }
+ return NULL;
+}
const char* mkstringf(const char* format, ...)
+{
+ _SIMPLE_STRING buf = _simple_salloc();
+ if ( buf != NULL ) {
+ va_list list;
+ va_start(list, format);
+ _simple_vsprintf(buf, format, list);
+ va_end(list);
+ const char* t = strdup(_simple_string(buf));
+ _simple_sfree(buf);
+ if ( t != NULL )
+ return t;
+ }
+ return "mkstringf, out of memory error";
+}
+
+
+void throwf(const char* format, ...)
+{
+ _SIMPLE_STRING buf = _simple_salloc();
+ if ( buf != NULL ) {
+ va_list list;
+ va_start(list, format);
+ _simple_vsprintf(buf, format, list);
+ va_end(list);
+ const char* t = strdup(_simple_string(buf));
+ _simple_sfree(buf);
+ if ( t != NULL )
+ throw t;
+ }
+ throw "throwf, out of memory error";
+}
+
+
+#if !TARGET_IPHONE_SIMULATOR
+static int sLogfile = STDERR_FILENO;
+#endif
+
+#if !TARGET_IPHONE_SIMULATOR
+// based on CFUtilities.c: also_do_stderr()
+static bool useSyslog()
+{
+ // Use syslog() for processes managed by launchd
+ static bool launchdChecked = false;
+ static bool launchdOwned = false;
+ if ( !launchdChecked && gProcessInfo->libSystemInitialized ) {
+ if ( (gLibSystemHelpers != NULL) && (gLibSystemHelpers->version >= 11) ) {
+ // <rdar://problem/23520449> only call isLaunchdOwned() after libSystem is initialized
+ launchdOwned = (*gLibSystemHelpers->isLaunchdOwned)();
+ launchdChecked = true;
+ }
+ }
+ if ( launchdChecked && launchdOwned )
+ return true;
+
+ // If stderr is not available, use syslog()
+ struct stat sb;
+ int result = fstat(STDERR_FILENO, &sb);
+ if ( result < 0 )
+ return true; // file descriptor 2 is closed
+
+ return false;
+}
+
+
+static void socket_syslogv(int priority, const char* format, va_list list)
+{
+ // lazily create socket and connection to syslogd
+ if ( sLogSocket == -1 ) {
+ sLogSocket = ::socket(AF_UNIX, SOCK_DGRAM, 0);
+ if (sLogSocket == -1)
+ return; // cannot log
+ ::fcntl(sLogSocket, F_SETFD, 1);
+
+ struct sockaddr_un addr;
+ addr.sun_family = AF_UNIX;
+ strncpy(addr.sun_path, _PATH_LOG, sizeof(addr.sun_path));
+ if ( ::connect(sLogSocket, (struct sockaddr *)&addr, sizeof(addr)) == -1 ) {
+ ::close(sLogSocket);
+ sLogSocket = -1;
+ return;
+ }
+ }
+
+ // format message to syslogd like: "<priority>Process[pid]: message"
+ _SIMPLE_STRING buf = _simple_salloc();
+ if ( buf == NULL )
+ return;
+ if ( _simple_sprintf(buf, "<%d>%s[%d]: ", LOG_USER|LOG_NOTICE, sExecShortName, getpid()) == 0 ) {
+ if ( _simple_vsprintf(buf, format, list) == 0 ) {
+ const char* p = _simple_string(buf);
+ ::__sendto(sLogSocket, p, strlen(p), 0, NULL, 0);
+ }
+ }
+ _simple_sfree(buf);
+}
+
+
+
+void vlog(const char* format, va_list list)
+{
+#if __IPHONE_OS_VERSION_MIN_REQUIRED && !TARGET_IPHONE_SIMULATOR
+ // <rdar://problem/25965832> log to console when running iOS app from Xcode
+ if ( !sLogToFile && !sForceStderr && useSyslog() )
+#else
+ if ( !sLogToFile && useSyslog() )
+#endif
+ socket_syslogv(LOG_ERR, format, list);
+ else {
+ _simple_vdprintf(sLogfile, format, list);
+ }
+}
+
+void log(const char* format, ...)
{
va_list list;
va_start(list, format);
- _SIMPLE_STRING buf = _simple_salloc();
- _simple_vsprintf(buf, format, list);
+ vlog(format, list);
va_end(list);
- const char* t = strdup(_simple_string(buf));
- _simple_sfree(buf);
- return t;
-}
-
-
-void throwf(const char* format, ...)
+}
+
+
+void vwarn(const char* format, va_list list)
+{
+ _simple_dprintf(sLogfile, "dyld: warning, ");
+ _simple_vdprintf(sLogfile, format, list);
+}
+
+void warn(const char* format, ...)
{
va_list list;
va_start(list, format);
- _SIMPLE_STRING buf = _simple_salloc();
- _simple_vsprintf(buf, format, list);
+ vwarn(format, list);
va_end(list);
- const char* t = strdup(_simple_string(buf));
- _simple_sfree(buf);
- throw t;
-}
-
-void log(const char* format, ...)
-{
- va_list list;
- va_start(list, format);
- _simple_vdprintf(STDERR_FILENO, format, list);
- va_end(list);
-}
-
-void warn(const char* format, ...)
-{
- _simple_dprintf(STDERR_FILENO, "dyld: warning, ");
- va_list list;
- va_start(list, format);
- _simple_vdprintf(STDERR_FILENO, format, list);
- va_end(list);
+}
+
+
+#endif // !TARGET_IPHONE_SIMULATOR
+
+
+// <rdar://problem/8867781> control access to sAllImages through a lock
+// because global dyld lock is not held during initialization phase of dlopen()
+// <rdar://problem/16145518> Use OSSpinLockLock to allow yielding
+static OSSpinLock sAllImagesLock = 0;
+
+static void allImagesLock()
+{
+ OSSpinLockLock(&sAllImagesLock);
+}
+
+static void allImagesUnlock()
+{
+ OSSpinLockUnlock(&sAllImagesLock);
}
@@ -242,7 +590,7 @@
FileOpener::FileOpener(const char* path)
: fd(-1)
{
- fd = open(path, O_RDONLY, 0);
+ fd = my_open(path, O_RDONLY, 0);
}
FileOpener::~FileOpener()
@@ -252,20 +600,9 @@
}
-// forward declaration
-#if __ppc__ || __i386__
-bool isRosetta();
-#endif
-
-
static void registerDOFs(const std::vector<ImageLoader::DOFInfo>& dofs)
{
-#if __ppc__
- // can't dtrace a program running emulated under rosetta rdar://problem/5179640
- if ( isRosetta() )
- return;
-#endif
- const unsigned int dofSectionCount = dofs.size();
+ const size_t dofSectionCount = dofs.size();
if ( !sEnv.DYLD_DISABLE_DOFS && (dofSectionCount != 0) ) {
int fd = open("/dev/" DTRACEMNR_HELPER, O_RDWR);
if ( fd < 0 ) {
@@ -295,13 +632,13 @@
info.registrationID = (int)(ioctlData->dofiod_helpers[i].dofhp_dof);
sImageFilesNeedingDOFUnregistration.push_back(info);
if ( gLinkContext.verboseDOF ) {
- dyld::log("dyld: registering DOF section 0x%p in %s with dtrace, ID=0x%08X\n",
+ dyld::log("dyld: registering DOF section %p in %s with dtrace, ID=0x%08X\n",
dofs[i].dof, dofs[i].imageShortName, info.registrationID);
}
}
}
else {
- dyld::log( "dyld: ioctl to register dtrace DOF section failed\n");
+ //dyld::log( "dyld: ioctl to register dtrace DOF section failed\n");
}
close(fd);
}
@@ -337,72 +674,211 @@
}
+
// notify gdb about these new images
-static const char* notifyGDB(enum dyld_image_states state, uint32_t infoCount, const struct dyld_image_info info[])
-{
- addImagesToAllImages(infoCount, info);
+static const char* updateAllImages(enum dyld_image_states state, uint32_t infoCount, const struct dyld_image_info info[])
+{
+ // <rdar://problem/8812589> don't add images without paths to all-image-info-list
+ if ( info[0].imageFilePath != NULL )
+ addImagesToAllImages(infoCount, info);
return NULL;
}
-#if IMAGE_NOTIFY_SUPPORT
-// notify objc about these new images
-static void notifyAdding(const ImageLoader* const * images, unsigned int count)
-{
- // build array
- if ( count != 0 ) {
- dyld_image_info infos[count];
- for (unsigned int i=0; i < count; ++i) {
- dyld_image_info* p = &infos[i];
- const ImageLoader* image = images[i];
- p->imageLoadAddress = image->machHeader();
- p->imageFilePath = image->getPath();
- p->imageFileModDate = image->lastModified();
- //dyld::log("notifying objc about %s\n", image->getPath());
- }
-
- // tell all interested images (after gdb, so you can debug anything the notification does)
- for (std::vector<ImageLoader*>::iterator it=sImagesToNotifyAboutOtherImages.begin(); it != sImagesToNotifyAboutOtherImages.end(); it++) {
- (*it)->doNotification(dyld_image_adding, count, infos);
- }
- }
-}
-#endif
-
-static StateHandlers* stateToHandlers(dyld_image_states state, StateHandlers handlersArray[8])
+
+static StateHandlers* stateToHandlers(dyld_image_states state, void* handlersArray[7][3])
{
switch ( state ) {
case dyld_image_state_mapped:
- return &handlersArray[0];
+ return reinterpret_cast<StateHandlers*>(&handlersArray[0]);
case dyld_image_state_dependents_mapped:
- return &handlersArray[1];
+ return reinterpret_cast<StateHandlers*>(&handlersArray[1]);
case dyld_image_state_rebased:
- return &handlersArray[2];
+ return reinterpret_cast<StateHandlers*>(&handlersArray[2]);
case dyld_image_state_bound:
- return &handlersArray[3];
+ return reinterpret_cast<StateHandlers*>(&handlersArray[3]);
case dyld_image_state_dependents_initialized:
- return &handlersArray[4];
+ return reinterpret_cast<StateHandlers*>(&handlersArray[4]);
case dyld_image_state_initialized:
- return &handlersArray[5];
+ return reinterpret_cast<StateHandlers*>(&handlersArray[5]);
case dyld_image_state_terminated:
- return &handlersArray[6];
+ return reinterpret_cast<StateHandlers*>(&handlersArray[6]);
}
return NULL;
}
-static void notifySingle(dyld_image_states state, const struct mach_header* mh, const char* path, time_t modDate)
-{
+#if SUPPORT_ACCELERATE_TABLES
+static dyld_image_state_change_handler getPreInitNotifyHandler(unsigned index)
+{
+ std::vector<dyld_image_state_change_handler>* handlers = stateToHandlers(dyld_image_state_dependents_initialized, sSingleHandlers);
+ if ( index >= handlers->size() )
+ return NULL;
+ return (*handlers)[index];
+}
+
+static dyld_image_state_change_handler getBoundBatchHandler(unsigned index)
+{
+ std::vector<dyld_image_state_change_handler>* handlers = stateToHandlers(dyld_image_state_bound, sBatchHandlers);
+ if ( index >= handlers->size() )
+ return NULL;
+ return (*handlers)[index];
+}
+
+static void notifySingleFromCache(dyld_image_states state, const mach_header* mh, const char* path)
+{
+ //dyld::log("notifySingle(state=%d, image=%s)\n", state, image->getPath());
std::vector<dyld_image_state_change_handler>* handlers = stateToHandlers(state, sSingleHandlers);
if ( handlers != NULL ) {
dyld_image_info info;
info.imageLoadAddress = mh;
info.imageFilePath = path;
- info.imageFileModDate = modDate;
+ info.imageFileModDate = 0;
+ for (dyld_image_state_change_handler handler : *handlers) {
+ const char* result = (*handler)(state, 1, &info);
+ if ( (result != NULL) && (state == dyld_image_state_mapped) ) {
+ //fprintf(stderr, " image rejected by handler=%p\n", *it);
+ // make copy of thrown string so that later catch clauses can free it
+ const char* str = strdup(result);
+ throw str;
+ }
+ }
+ }
+ if ( (state == dyld_image_state_dependents_initialized) && (sNotifyObjCInit != NULL) && (mh->flags & MH_HAS_OBJC) ) {
+ (*sNotifyObjCInit)(path, mh);
+ }
+}
+#endif
+
+static mach_port_t sNotifyReplyPorts[DYLD_MAX_PROCESS_INFO_NOTIFY_COUNT];
+
+
+static void notifyMonitoringDyld(bool unloading, unsigned portSlot, unsigned imageCount, const dyld_image_info infos[])
+{
+ unsigned entriesSize = imageCount*sizeof(dyld_process_info_image_entry);
+ unsigned pathsSize = 0;
+ for (unsigned j=0; j < imageCount; ++j) {
+ pathsSize += (strlen(infos[j].imageFilePath) + 1);
+ }
+ unsigned totalSize = (sizeof(dyld_process_info_notify_header) + entriesSize + pathsSize + 127) & -128; // align
+ if ( totalSize > DYLD_PROCESS_INFO_NOTIFY_MAX_BUFFER_SIZE ) {
+ // Putting all image paths into one message would make buffer too big.
+ // Instead split into two messages. Recurse as needed until paths fit in buffer.
+ unsigned imageHalfCount = imageCount/2;
+ notifyMonitoringDyld(unloading, portSlot, imageHalfCount, infos);
+ notifyMonitoringDyld(unloading, portSlot, imageCount - imageHalfCount, &infos[imageHalfCount]);
+ return;
+ }
+ uint8_t buffer[totalSize];
+ dyld_process_info_notify_header* header = (dyld_process_info_notify_header*)buffer;
+ header->version = 1;
+ header->imageCount = imageCount;
+ header->imagesOffset = sizeof(dyld_process_info_notify_header);
+ header->stringsOffset = sizeof(dyld_process_info_notify_header) + entriesSize;
+ header->timestamp = mach_absolute_time();
+ dyld_process_info_image_entry* entries = (dyld_process_info_image_entry*)&buffer[header->imagesOffset];
+ char* const pathPoolStart = (char*)&buffer[header->stringsOffset];
+ char* pathPool = pathPoolStart;
+ for (unsigned j=0; j < imageCount; ++j) {
+ strcpy(pathPool, infos[j].imageFilePath);
+ uint32_t len = (uint32_t)strlen(pathPool);
+ bzero(entries->uuid, 16);
+ const ImageLoader* image = findImageByMachHeader(infos[j].imageLoadAddress);
+ if ( image != NULL ) {
+ image->getUUID(entries->uuid);
+ }
+#if SUPPORT_ACCELERATE_TABLES
+ else if ( sAllCacheImagesProxy != NULL ) {
+ const mach_header* mh;
+ const char* path;
+ unsigned index;
+ if ( sAllCacheImagesProxy->addressInCache(infos[j].imageLoadAddress, &mh, &path, &index) ) {
+ sAllCacheImagesProxy->getDylibUUID(index, entries->uuid);
+ }
+ }
+#endif
+ entries->loadAddress = (uint64_t)infos[j].imageLoadAddress;
+ entries->pathStringOffset = (uint32_t)(pathPool - pathPoolStart);
+ entries->pathLength = len;
+ pathPool += (len +1);
+ ++entries;
+ }
+
+ if ( sNotifyReplyPorts[portSlot] == 0 ) {
+ if ( !mach_port_allocate(mach_task_self(), MACH_PORT_RIGHT_RECEIVE, &sNotifyReplyPorts[portSlot]) )
+ mach_port_insert_right(mach_task_self(), sNotifyReplyPorts[portSlot], sNotifyReplyPorts[portSlot], MACH_MSG_TYPE_MAKE_SEND);
+ //dyld::log("allocated reply port %d\n", sNotifyReplyPorts[portSlot]);
+ }
+ //dyld::log("found port to send to\n");
+ mach_msg_header_t* h = (mach_msg_header_t*)buffer;
+ h->msgh_bits = MACH_MSGH_BITS(MACH_MSG_TYPE_COPY_SEND,MACH_MSG_TYPE_MAKE_SEND); // MACH_MSG_TYPE_MAKE_SEND_ONCE
+ h->msgh_id = unloading ? DYLD_PROCESS_INFO_NOTIFY_UNLOAD_ID : DYLD_PROCESS_INFO_NOTIFY_LOAD_ID;
+ h->msgh_local_port = sNotifyReplyPorts[portSlot];
+ h->msgh_remote_port = dyld::gProcessInfo->notifyPorts[portSlot];
+ h->msgh_reserved = 0;
+ h->msgh_size = (mach_msg_size_t)sizeof(buffer);
+ //dyld::log("sending to port[%d]=%d, size=%d, reply port=%d, id=0x%X\n", portSlot, dyld::gProcessInfo->notifyPorts[portSlot], h->msgh_size, sNotifyReplyPorts[portSlot], h->msgh_id);
+ kern_return_t sendResult = mach_msg(h, MACH_SEND_MSG | MACH_RCV_MSG | MACH_SEND_TIMEOUT, h->msgh_size, h->msgh_size, sNotifyReplyPorts[portSlot], 100, MACH_PORT_NULL);
+ //dyld::log("send result = 0x%X, msg_id=%d, msg_size=%d\n", sendResult, h->msgh_id, h->msgh_size);
+ if ( sendResult == MACH_SEND_INVALID_DEST ) {
+ // sender is not responding, detatch
+ //dyld::log("process requesting notification gone. deallocation send port %d and receive port %d\n", dyld::gProcessInfo->notifyPorts[portSlot], sNotifyReplyPorts[portSlot]);
+ mach_port_deallocate(mach_task_self(), dyld::gProcessInfo->notifyPorts[portSlot]);
+ mach_port_deallocate(mach_task_self(), sNotifyReplyPorts[portSlot]);
+ dyld::gProcessInfo->notifyPorts[portSlot] = 0;
+ sNotifyReplyPorts[portSlot] = 0;
+ }
+}
+
+#define MAX_KERNEL_IMAGES_PER_CALL (100)
+
+static void flushKernelNotifications(bool loading, bool force, std::array<dyld_kernel_image_info_t,MAX_KERNEL_IMAGES_PER_CALL>& kernelInfos, uint32_t &kernelInfoCount) {
+ if ((force && kernelInfoCount != 0) || kernelInfoCount == MAX_KERNEL_IMAGES_PER_CALL) {
+ if (loading) {
+ task_register_dyld_image_infos(mach_task_self(), kernelInfos.data(), kernelInfoCount);
+ } else {
+ task_unregister_dyld_image_infos(mach_task_self(), kernelInfos.data(), kernelInfoCount);
+ }
+ kernelInfoCount = 0;
+ }
+}
+
+static
+void queueKernelNotification(const ImageLoader& image, bool loading, std::array<dyld_kernel_image_info_t,MAX_KERNEL_IMAGES_PER_CALL>& kernelInfos, uint32_t &kernelInfoCount) {
+ if ( !image.inSharedCache() ) {
+ ino_t inode = image.getInode();
+ image.getUUID(kernelInfos[kernelInfoCount].uuid);
+ memcpy(&kernelInfos[kernelInfoCount].fsobjid, &inode, 8);
+ kernelInfos[kernelInfoCount].load_addr = (uint64_t)image.machHeader();
+ // FIXME we should also be grabbing the device ID, but that is not necessary yet,
+ // and requires threading it through the ImageLoader
+ kernelInfos[kernelInfoCount].fsid.val[0] = 0;
+ kernelInfos[kernelInfoCount].fsid.val[1] = 0;
+ kernelInfoCount++;
+ }
+ flushKernelNotifications(loading, false, kernelInfos, kernelInfoCount);
+}
+
+void notifyKernel(const ImageLoader& image, bool loading) {
+ std::array<dyld_kernel_image_info_t,MAX_KERNEL_IMAGES_PER_CALL> kernelInfos;
+ uint32_t kernelInfoCount = 0;
+ queueKernelNotification(image, loading, kernelInfos, kernelInfoCount);
+ flushKernelNotifications(loading, true, kernelInfos, kernelInfoCount);
+}
+
+static void notifySingle(dyld_image_states state, const ImageLoader* image, ImageLoader::InitializerTimingList* timingInfo)
+{
+ //dyld::log("notifySingle(state=%d, image=%s)\n", state, image->getPath());
+ std::vector<dyld_image_state_change_handler>* handlers = stateToHandlers(state, sSingleHandlers);
+ if ( handlers != NULL ) {
+ dyld_image_info info;
+ info.imageLoadAddress = image->machHeader();
+ info.imageFilePath = image->getRealPath();
+ info.imageFileModDate = image->lastModified();
for (std::vector<dyld_image_state_change_handler>::iterator it = handlers->begin(); it != handlers->end(); ++it) {
const char* result = (*it)(state, 1, &info);
if ( (result != NULL) && (state == dyld_image_state_mapped) ) {
@@ -413,8 +889,95 @@
}
}
}
-}
-
+ if ( state == dyld_image_state_mapped ) {
+ // <rdar://problem/7008875> Save load addr + UUID for images from outside the shared cache
+ if ( !image->inSharedCache() ) {
+ dyld_uuid_info info;
+ if ( image->getUUID(info.imageUUID) ) {
+ info.imageLoadAddress = image->machHeader();
+ addNonSharedCacheImageUUID(info);
+ }
+ }
+ }
+ if ( (state == dyld_image_state_dependents_initialized) && (sNotifyObjCInit != NULL) && image->notifyObjC() ) {
+ uint64_t t0 = mach_absolute_time();
+ (*sNotifyObjCInit)(image->getRealPath(), image->machHeader());
+ uint64_t t1 = mach_absolute_time();
+ uint64_t t2 = mach_absolute_time();
+ uint64_t timeInObjC = t1-t0;
+ uint64_t emptyTime = (t2-t1)*100;
+ if ( (timeInObjC > emptyTime) && (timingInfo != NULL) ) {
+ timingInfo->addTime(image->getShortName(), timeInObjC);
+ }
+ }
+ // mach message csdlc about dynamically unloaded images
+ if ( image->addFuncNotified() && (state == dyld_image_state_terminated) ) {
+ notifyKernel(*image, false);
+
+ uint64_t loadTimestamp = mach_absolute_time();
+ if ( sEnv.DYLD_PRINT_CS_NOTIFICATIONS ) {
+ dyld::log("dyld: coresymbolication_unload_notifier(%p, 0x%016llX, %p, %s)\n",
+ dyld::gProcessInfo->coreSymbolicationShmPage, loadTimestamp, image->machHeader(), image->getPath());
+ }
+ if ( dyld::gProcessInfo->coreSymbolicationShmPage != NULL) {
+ coresymbolication_unload_notifier(dyld::gProcessInfo->coreSymbolicationShmPage, loadTimestamp, image->getPath(), image->machHeader());
+ }
+ for (int slot=0; slot < DYLD_MAX_PROCESS_INFO_NOTIFY_COUNT; ++slot) {
+ if ( dyld::gProcessInfo->notifyPorts[slot] != 0 ) {
+ dyld_image_info info;
+ info.imageLoadAddress = image->machHeader();
+ info.imageFilePath = image->getPath();
+ info.imageFileModDate = 0;
+ notifyMonitoringDyld(true, slot, 1, &info);
+ }
+ else if ( sNotifyReplyPorts[slot] != 0 ) {
+ // monitoring process detached from this process, so release reply port
+ //dyld::log("deallocated reply port %d\n", sNotifyReplyPorts[slot]);
+ mach_port_deallocate(mach_task_self(), sNotifyReplyPorts[slot]);
+ sNotifyReplyPorts[slot] = 0;
+ }
+ }
+ }
+
+}
+
+
+//
+// Normally, dyld_all_image_infos is only updated in batches after an entire
+// graph is loaded. But if there is an error loading the initial set of
+// dylibs needed by the main executable, dyld_all_image_infos is not yet set
+// up, leading to usually brief crash logs.
+//
+// This function manually adds the images loaded so far to dyld::gProcessInfo.
+// It should only be called before terminating.
+//
+void syncAllImages()
+{
+ for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); ++it) {
+ dyld_image_info info;
+ ImageLoader* image = *it;
+ info.imageLoadAddress = image->machHeader();
+ info.imageFilePath = image->getRealPath();
+ info.imageFileModDate = image->lastModified();
+ // add to all_image_infos if not already there
+ bool found = false;
+ int existingCount = dyld::gProcessInfo->infoArrayCount;
+ const dyld_image_info* existing = dyld::gProcessInfo->infoArray;
+ if ( existing != NULL ) {
+ for (int i=0; i < existingCount; ++i) {
+ if ( existing[i].imageLoadAddress == info.imageLoadAddress ) {
+ //dyld::log("not adding %s\n", info.imageFilePath);
+ found = true;
+ break;
+ }
+ }
+ }
+ if ( ! found ) {
+ //dyld::log("adding %s\n", info.imageFilePath);
+ addImagesToAllImages(1, &info);
+ }
+ }
+}
static int imageSorter(const void* l, const void* r)
@@ -424,69 +987,154 @@
return left->compare(right);
}
-static void notifyBatchPartial(dyld_image_states state, bool orLater, dyld_image_state_change_handler onlyHandler)
+static void notifyBatchPartial(dyld_image_states state, bool orLater, dyld_image_state_change_handler onlyHandler, bool preflightOnly, bool onlyObjCMappedNotification)
{
std::vector<dyld_image_state_change_handler>* handlers = stateToHandlers(state, sBatchHandlers);
- if ( handlers != NULL ) {
+ std::array<dyld_kernel_image_info_t,MAX_KERNEL_IMAGES_PER_CALL> kernelInfos;
+ uint32_t kernelInfoCount = 0;
+
+ if ( (handlers != NULL) || ((state == dyld_image_state_bound) && (sNotifyObjCMapped != NULL)) ) {
// don't use a vector because it will use malloc/free and we want notifcation to be low cost
- ImageLoader* images[sAllImages.size()+1];
- ImageLoader** end = images;
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
- dyld_image_states imageState = (*it)->getState();
- if ( (imageState == state) || (orLater && (imageState > state)) )
- *end++ = *it;
- }
+ allImagesLock();
+ dyld_image_info infos[allImagesCount()+1];
+ ImageLoader* images[allImagesCount()+1];
+ ImageLoader** end = images;
+ for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
+ dyld_image_states imageState = (*it)->getState();
+ if ( (imageState == state) || (orLater && (imageState > state)) )
+ *end++ = *it;
+ }
if ( sBundleBeingLoaded != NULL ) {
dyld_image_states imageState = sBundleBeingLoaded->getState();
if ( (imageState == state) || (orLater && (imageState > state)) )
*end++ = sBundleBeingLoaded;
}
- unsigned int count = end-images;
- if ( end != images ) {
+ const char* dontLoadReason = NULL;
+ uint32_t imageCount = (uint32_t)(end-images);
+ if ( imageCount != 0 ) {
// sort bottom up
- qsort(images, count, sizeof(ImageLoader*), &imageSorter);
+ qsort(images, imageCount, sizeof(ImageLoader*), &imageSorter);
// build info array
- dyld_image_info infos[count];
- for (unsigned int i=0; i < count; ++i) {
+ for (unsigned int i=0; i < imageCount; ++i) {
dyld_image_info* p = &infos[i];
ImageLoader* image = images[i];
//dyld::log(" state=%d, name=%s\n", state, image->getPath());
p->imageLoadAddress = image->machHeader();
- p->imageFilePath = image->getPath();
+ p->imageFilePath = image->getRealPath();
p->imageFileModDate = image->lastModified();
+ // get these registered with the kernel as early as possible
+ if ( state == dyld_image_state_dependents_mapped)
+ queueKernelNotification(*image, true, kernelInfos, kernelInfoCount);
// special case for add_image hook
if ( state == dyld_image_state_bound )
notifyAddImageCallbacks(image);
}
-
- if ( onlyHandler != NULL ) {
- const char* result = (*onlyHandler)(state, count, infos);
- if ( (result != NULL) && (state == dyld_image_state_dependents_mapped) ) {
- //fprintf(stderr, " images rejected by handler=%p\n", onlyHandler);
- // make copy of thrown string so that later catch clauses can free it
- const char* str = strdup(result);
- throw str;
+ flushKernelNotifications(true, true, kernelInfos, kernelInfoCount);
+ }
+#if SUPPORT_ACCELERATE_TABLES
+ if ( sAllCacheImagesProxy != NULL ) {
+ unsigned cacheCount = sAllCacheImagesProxy->appendImagesToNotify(state, orLater, &infos[imageCount]);
+ // support _dyld_register_func_for_add_image()
+ if ( state == dyld_image_state_bound ) {
+ for (ImageCallback callback : sAddImageCallbacks) {
+ for (unsigned i=0; i < cacheCount; ++i)
+ (*callback)(infos[imageCount+i].imageLoadAddress, sSharedCacheSlide);
}
}
- else {
- // call each handler with whole array
- for (std::vector<dyld_image_state_change_handler>::iterator it = handlers->begin(); it != handlers->end(); ++it) {
- const char* result = (*it)(state, count, infos);
+ imageCount += cacheCount;
+ }
+#endif
+ if ( imageCount != 0 ) {
+ if ( !onlyObjCMappedNotification ) {
+ if ( onlyHandler != NULL ) {
+ const char* result = NULL;
+ if ( result == NULL ) {
+ result = (*onlyHandler)(state, imageCount, infos);
+ }
if ( (result != NULL) && (state == dyld_image_state_dependents_mapped) ) {
- //fprintf(stderr, " images rejected by handler=%p\n", *it);
+ //fprintf(stderr, " images rejected by handler=%p\n", onlyHandler);
// make copy of thrown string so that later catch clauses can free it
- const char* str = strdup(result);
- throw str;
+ dontLoadReason = strdup(result);
}
}
- }
- }
- }
-}
-
-static void notifyBatch(dyld_image_states state)
-{
- notifyBatchPartial(state, false, NULL);
+ else {
+ // call each handler with whole array
+ if ( handlers != NULL ) {
+ for (std::vector<dyld_image_state_change_handler>::iterator it = handlers->begin(); it != handlers->end(); ++it) {
+ const char* result = (*it)(state, imageCount, infos);
+ if ( (result != NULL) && (state == dyld_image_state_dependents_mapped) ) {
+ //fprintf(stderr, " images rejected by handler=%p\n", *it);
+ // make copy of thrown string so that later catch clauses can free it
+ dontLoadReason = strdup(result);
+ break;
+ }
+ }
+ }
+ }
+ }
+ // tell objc about new images
+ if ( (onlyHandler == NULL) && ((state == dyld_image_state_bound) || (orLater && (dyld_image_state_bound > state))) && (sNotifyObjCMapped != NULL) ) {
+ const char* paths[imageCount];
+ const mach_header* mhs[imageCount];
+ unsigned objcImageCount = 0;
+ for (int i=0; i < imageCount; ++i) {
+ const ImageLoader* image = findImageByMachHeader(infos[i].imageLoadAddress);
+ bool hasObjC = false;
+ if ( image != NULL ) {
+ hasObjC = image->notifyObjC();
+ }
+#if SUPPORT_ACCELERATE_TABLES
+ else if ( sAllCacheImagesProxy != NULL ) {
+ const mach_header* mh;
+ const char* path;
+ unsigned index;
+ if ( sAllCacheImagesProxy->addressInCache(infos[i].imageLoadAddress, &mh, &path, &index) ) {
+ hasObjC = (mh->flags & MH_HAS_OBJC);
+ }
+ }
+#endif
+ if ( hasObjC ) {
+ paths[objcImageCount] = infos[i].imageFilePath;
+ mhs[objcImageCount] = infos[i].imageLoadAddress;
+ ++objcImageCount;
+ }
+ }
+ if ( objcImageCount != 0 ) {
+ uint64_t t0 = mach_absolute_time();
+ (*sNotifyObjCMapped)(objcImageCount, paths, mhs);
+ uint64_t t1 = mach_absolute_time();
+ ImageLoader::fgTotalObjCSetupTime += (t1-t0);
+ }
+ }
+ }
+ allImagesUnlock();
+ if ( dontLoadReason != NULL )
+ throw dontLoadReason;
+ if ( !preflightOnly && (state == dyld_image_state_dependents_mapped) ) {
+ if ( (dyld::gProcessInfo->coreSymbolicationShmPage != NULL) || sEnv.DYLD_PRINT_CS_NOTIFICATIONS ) {
+ // mach message csdlc about loaded images
+ uint64_t loadTimestamp = mach_absolute_time();
+ for (unsigned j=0; j < imageCount; ++j) {
+ if ( sEnv.DYLD_PRINT_CS_NOTIFICATIONS ) {
+ dyld::log("dyld: coresymbolication_load_notifier(%p, 0x%016llX, %p, %s)\n",
+ dyld::gProcessInfo->coreSymbolicationShmPage, loadTimestamp, infos[j].imageLoadAddress, infos[j].imageFilePath);
+ }
+ coresymbolication_load_notifier(dyld::gProcessInfo->coreSymbolicationShmPage, loadTimestamp, infos[j].imageFilePath, infos[j].imageLoadAddress);
+ }
+ }
+ for (int slot=0; slot < DYLD_MAX_PROCESS_INFO_NOTIFY_COUNT; ++slot) {
+ if ( dyld::gProcessInfo->notifyPorts[slot] )
+ notifyMonitoringDyld(false, slot, imageCount, infos);
+ }
+ }
+ }
+}
+
+
+
+static void notifyBatch(dyld_image_states state, bool preflightOnly)
+{
+ notifyBatchPartial(state, false, NULL, preflightOnly, false);
}
// In order for register_func_for_add_image() callbacks to to be called bottom up,
@@ -500,14 +1148,6 @@
sImageRoots.push_back(image);
}
-#if IMAGE_NOTIFY_SUPPORT
-// Objective-C will contain a __DATA/__image_notify section which contains pointers to a function to call
-// whenever any new image is loaded.
-static void addImageNeedingNotification(ImageLoader* image)
-{
- sImagesToNotifyAboutOtherImages.push_back(image);
-}
-#endif
static void clearAllDepths()
{
@@ -515,34 +1155,21 @@
(*it)->clearDepth();
}
+static void printAllDepths()
+{
+ for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++)
+ dyld::log("%03d %s\n", (*it)->getDepth(), (*it)->getShortName());
+}
+
+
static unsigned int imageCount()
{
- return sAllImages.size();
-}
-
-static void notifySharedCacheInvalid()
-{
- gSharedCacheNeedsUpdating = true;
-}
-
-
-
-#if __i386__
-static void makeSharedCacheImportSegmentsWritable(bool writable)
-{
- // if cache was built with read-only __IMPORT segments
- if ( sImportSegmentsSize != 0 ) {
- vm_prot_t prot = VM_PROT_EXECUTE | PROT_READ;
- if ( writable )
- prot |= VM_PROT_WRITE;
- vm_protect(mach_task_self(), sImportSegmentsStart, sImportSegmentsSize, false, prot);
- if ( gLinkContext.verboseMapping ) {
- dyld::log("%18s at %p->%p altered permissions to %c%c%c\n", "", (char*)sImportSegmentsStart, (char*)sImportSegmentsStart+sImportSegmentsSize-1,
- (prot & PROT_READ) ? 'r' : '.', (prot & PROT_WRITE) ? 'w' : '.', (prot & PROT_EXEC) ? 'x' : '.' );
- }
- }
-}
-#endif
+ allImagesLock();
+ unsigned int result = (unsigned int)sAllImages.size();
+ allImagesUnlock();
+ return (result);
+}
+
static void setNewProgramVars(const ProgramVars& newVars)
{
@@ -563,32 +1190,113 @@
}
#endif
+static bool sandboxBlocked(const char* path, const char* kind)
+{
+#if TARGET_IPHONE_SIMULATOR
+ // sandbox calls not yet supported in simulator runtime
+ return false;
+#else
+ sandbox_filter_type filter = (sandbox_filter_type)(SANDBOX_FILTER_PATH | SANDBOX_CHECK_NO_REPORT);
+ return ( sandbox_check(getpid(), kind, filter, path) > 0 );
+#endif
+}
+
+bool sandboxBlockedMmap(const char* path)
+{
+ return sandboxBlocked(path, "file-map-executable");
+}
+
+bool sandboxBlockedOpen(const char* path)
+{
+ return sandboxBlocked(path, "file-read-data");
+}
+
+bool sandboxBlockedStat(const char* path)
+{
+ return sandboxBlocked(path, "file-read-metadata");
+}
+
+
+static void addDynamicReference(ImageLoader* from, ImageLoader* to) {
+ // don't add dynamic reference if target is in the shared cache (since it can't be unloaded)
+ if ( to->inSharedCache() )
+ return;
+
+ // don't add dynamic reference if there already is a static one
+ if ( from->dependsOn(to) )
+ return;
+
+ // don't add if this combination already exists
+ OSSpinLockLock(&sDynamicReferencesLock);
+ for (std::vector<ImageLoader::DynamicReference>::iterator it=sDynamicReferences.begin(); it != sDynamicReferences.end(); ++it) {
+ if ( (it->from == from) && (it->to == to) ) {
+ OSSpinLockUnlock(&sDynamicReferencesLock);
+ return;
+ }
+ }
+
+ //dyld::log("addDynamicReference(%s, %s\n", from->getShortName(), to->getShortName());
+ ImageLoader::DynamicReference t;
+ t.from = from;
+ t.to = to;
+ sDynamicReferences.push_back(t);
+ OSSpinLockUnlock(&sDynamicReferencesLock);
+}
+
static void addImage(ImageLoader* image)
{
// add to master list
- sAllImages.push_back(image);
-
- if ( sEnv.DYLD_PRINT_LIBRARIES || (sEnv.DYLD_PRINT_LIBRARIES_POST_LAUNCH && (sMainExecutable!=NULL) && sMainExecutable->isLinked()) ) {
+ allImagesLock();
+ sAllImages.push_back(image);
+ allImagesUnlock();
+
+ // update mapped ranges
+ uintptr_t lastSegStart = 0;
+ uintptr_t lastSegEnd = 0;
+ for(unsigned int i=0, e=image->segmentCount(); i < e; ++i) {
+ if ( image->segUnaccessible(i) )
+ continue;
+ uintptr_t start = image->segActualLoadAddress(i);
+ uintptr_t end = image->segActualEndAddress(i);
+ if ( start == lastSegEnd ) {
+ // two segments are contiguous, just record combined segments
+ lastSegEnd = end;
+ }
+ else {
+ // non-contiguous segments, record last (if any)
+ if ( lastSegEnd != 0 )
+ addMappedRange(image, lastSegStart, lastSegEnd);
+ lastSegStart = start;
+ lastSegEnd = end;
+ }
+ }
+ if ( lastSegEnd != 0 )
+ addMappedRange(image, lastSegStart, lastSegEnd);
+
+
+ if ( gLinkContext.verboseLoading || (sEnv.DYLD_PRINT_LIBRARIES_POST_LAUNCH && (sMainExecutable!=NULL) && sMainExecutable->isLinked()) ) {
dyld::log("dyld: loaded: %s\n", image->getPath());
}
-#if OLD_GDB_DYLD_INTERFACE
- // let gdb find out about this
- addImageForgdb(image->machHeader(), image->getSlide(), image->getPath(), image->getLogicalPath());
-#endif
-}
+}
+
+//
+// Helper for std::remove_if
+//
+class RefUsesImage {
+public:
+ RefUsesImage(ImageLoader* image) : _image(image) {}
+ bool operator()(const ImageLoader::DynamicReference& ref) const {
+ return ( (ref.from == _image) || (ref.to == _image) );
+ }
+private:
+ ImageLoader* _image;
+};
+
+
void removeImage(ImageLoader* image)
{
- // if in termination list, pull it out and run terminator
- for (std::vector<ImageLoader*>::iterator it=sImageFilesNeedingTermination.begin(); it != sImageFilesNeedingTermination.end(); it++) {
- if ( *it == image ) {
- sImageFilesNeedingTermination.erase(it);
- image->doTermination(gLinkContext);
- break;
- }
- }
-
// if has dtrace DOF section, tell dtrace it is going away, then remove from sImageFilesNeedingDOFUnregistration
for (std::vector<RegisteredDOF>::iterator it=sImageFilesNeedingDOFUnregistration.begin(); it != sImageFilesNeedingDOFUnregistration.end(); ) {
if ( it->mh == image->machHeader() ) {
@@ -601,46 +1309,43 @@
}
}
- // tell all register add image handlers about this
+ // tell all registered remove image handlers about this
// do this before removing image from internal data structures so that the callback can query dyld about the image
if ( image->getState() >= dyld_image_state_bound ) {
+ sRemoveImageCallbacksInUse = true; // This only runs inside dyld's global lock, so ok to use a global for the in-use flag.
for (std::vector<ImageCallback>::iterator it=sRemoveImageCallbacks.begin(); it != sRemoveImageCallbacks.end(); it++) {
(*it)(image->machHeader(), image->getSlide());
}
- }
-
-#if IMAGE_NOTIFY_SUPPORT
- // tell all interested images
- for (std::vector<ImageLoader*>::iterator it=sImagesToNotifyAboutOtherImages.begin(); it != sImagesToNotifyAboutOtherImages.end(); it++) {
- dyld_image_info info;
- info.imageLoadAddress = image->machHeader();
- info.imageFilePath = image->getPath();
- info.imageFileModDate = image->lastModified();
- (*it)->doNotification(dyld_image_removing, 1, &info);
- }
-#endif
+ sRemoveImageCallbacksInUse = false;
+
+ if ( sNotifyObjCUnmapped != NULL && image->notifyObjC() )
+ (*sNotifyObjCUnmapped)(image->getRealPath(), image->machHeader());
+ }
+
+ // notify
+ notifySingle(dyld_image_state_terminated, image, NULL);
+
+ // remove from mapped images table
+ removedMappedRanges(image);
// remove from master list
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
- if ( *it == image ) {
- sAllImages.erase(it);
- break;
- }
- }
-
+ allImagesLock();
+ for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
+ if ( *it == image ) {
+ sAllImages.erase(it);
+ break;
+ }
+ }
+ allImagesUnlock();
+
+ // remove from sDynamicReferences
+ OSSpinLockLock(&sDynamicReferencesLock);
+ sDynamicReferences.erase(std::remove_if(sDynamicReferences.begin(), sDynamicReferences.end(), RefUsesImage(image)), sDynamicReferences.end());
+ OSSpinLockUnlock(&sDynamicReferencesLock);
+
// flush find-by-address cache (do this after removed from master list, so there is no chance it can come back)
if ( sLastImageByAddressCache == image )
sLastImageByAddressCache = NULL;
-
-#if IMAGE_NOTIFY_SUPPORT
- // if in announcement list, pull it out
- for (std::vector<ImageLoader*>::iterator it=sImagesToNotifyAboutOtherImages.begin(); it != sImagesToNotifyAboutOtherImages.end(); it++) {
- if ( *it == image ) {
- sImagesToNotifyAboutOtherImages.erase(it);
- break;
- }
- }
-#endif
// if in root list, pull it out
for (std::vector<ImageLoader*>::iterator it=sImageRoots.begin(); it != sImageRoots.end(); it++) {
@@ -651,20 +1356,32 @@
}
// log if requested
- if ( sEnv.DYLD_PRINT_LIBRARIES || (sEnv.DYLD_PRINT_LIBRARIES_POST_LAUNCH && (sMainExecutable!=NULL) && sMainExecutable->isLinked()) ) {
+ if ( gLinkContext.verboseLoading || (sEnv.DYLD_PRINT_LIBRARIES_POST_LAUNCH && (sMainExecutable!=NULL) && sMainExecutable->isLinked()) ) {
dyld::log("dyld: unloaded: %s\n", image->getPath());
}
// tell gdb, new way
removeImageFromAllImages(image->machHeader());
-
-#if OLD_GDB_DYLD_INTERFACE
- // tell gdb, old way
- removeImageForgdb(image->machHeader());
- gdb_dyld_state_changed();
-#endif
-}
-
+}
+
+
+void runImageStaticTerminators(ImageLoader* image)
+{
+ // if in termination list, pull it out and run terminator
+ bool mightBeMore;
+ do {
+ mightBeMore = false;
+ for (std::vector<ImageLoader*>::iterator it=sImageFilesNeedingTermination.begin(); it != sImageFilesNeedingTermination.end(); it++) {
+ if ( *it == image ) {
+ sImageFilesNeedingTermination.erase(it);
+ if (gLogAPIs) dyld::log("dlclose(), running static terminators for %p %s\n", image, image->getShortName());
+ image->doTermination(gLinkContext);
+ mightBeMore = true;
+ break;
+ }
+ }
+ } while ( mightBeMore );
+}
static void terminationRecorder(ImageLoader* image)
{
@@ -676,36 +1393,49 @@
return sExecPath;
}
+static void runAllStaticTerminators(void* extra)
+{
+ try {
+ const size_t imageCount = sImageFilesNeedingTermination.size();
+ for(size_t i=imageCount; i > 0; --i){
+ ImageLoader* image = sImageFilesNeedingTermination[i-1];
+ image->doTermination(gLinkContext);
+ }
+ sImageFilesNeedingTermination.clear();
+ notifyBatch(dyld_image_state_terminated, false);
+ }
+ catch (const char* msg) {
+ halt(msg);
+ }
+}
void initializeMainExecutable()
{
-
// record that we've reached this step
gLinkContext.startedInitializingMainExecutable = true;
-#if __i386__
- // make all __IMPORT segments in the shared cache read-only
- // before executing any code
- makeSharedCacheImportSegmentsWritable(false);
-#endif
-
// run initialzers for any inserted dylibs
- const int rootCount = sImageRoots.size();
+ ImageLoader::InitializerTimingList initializerTimes[allImagesCount()];
+ initializerTimes[0].count = 0;
+ const size_t rootCount = sImageRoots.size();
if ( rootCount > 1 ) {
- for(int i=1; i < rootCount; ++i)
- sImageRoots[i]->runInitializers(gLinkContext);
+ for(size_t i=1; i < rootCount; ++i) {
+ sImageRoots[i]->runInitializers(gLinkContext, initializerTimes[0]);
+ }
}
// run initializers for main executable and everything it brings up
- sMainExecutable->runInitializers(gLinkContext);
-
- // register atexit() handler to run terminators in all loaded images when this process exits
+ sMainExecutable->runInitializers(gLinkContext, initializerTimes[0]);
+
+ // register cxa_atexit() handler to run static terminators in all loaded images when this process exits
if ( gLibSystemHelpers != NULL )
- (*gLibSystemHelpers->cxa_atexit)(&runTerminators, NULL, NULL);
+ (*gLibSystemHelpers->cxa_atexit)(&runAllStaticTerminators, NULL, NULL);
// dump info if requested
if ( sEnv.DYLD_PRINT_STATISTICS )
- ImageLoaderMachO::printStatistics(sAllImages.size());
+ ImageLoader::printStatistics((unsigned int)allImagesCount(), initializerTimes[0]);
+ if ( sEnv.DYLD_PRINT_STATISTICS_DETAILS )
+ ImageLoaderMachO::printStatisticsDetails((unsigned int)allImagesCount(), initializerTimes[0]);
}
bool mainExecutablePrebound()
@@ -719,29 +1449,144 @@
}
-void runTerminators(void* extra)
-{
- const unsigned int imageCount = sImageFilesNeedingTermination.size();
- for(unsigned int i=imageCount; i > 0; --i){
- ImageLoader* image = sImageFilesNeedingTermination[i-1];
- image->doTermination(gLinkContext);
- notifySingle(dyld_image_state_terminated, image->machHeader(), image->getPath(), image->lastModified());
- }
- sImageFilesNeedingTermination.clear();
- notifyBatch(dyld_image_state_terminated);
-}
+
+
+#if SUPPORT_VERSIONED_PATHS
+
+// forward reference
+static bool getDylibVersionAndInstallname(const char* dylibPath, uint32_t* version, char* installName);
//
-// Turns a colon separated list of strings
-// into a NULL terminated array of string
-// pointers.
+// Examines a dylib file and if its current_version is newer than the installed
+// dylib at its install_name, then add the dylib file to sDylibOverrides.
//
-static const char** parseColonList(const char* list)
-{
- if ( list[0] == '\0' )
- return NULL;
-
+static void checkDylibOverride(const char* dylibFile)
+{
+ //dyld::log("checkDylibOverride('%s')\n", dylibFile);
+ uint32_t altVersion;
+ char sysInstallName[PATH_MAX];
+ if ( getDylibVersionAndInstallname(dylibFile, &altVersion, sysInstallName) && (sysInstallName[0] =='/') ) {
+ //dyld::log("%s has version 0x%08X and install name %s\n", dylibFile, altVersion, sysInstallName);
+ uint32_t sysVersion;
+ if ( getDylibVersionAndInstallname(sysInstallName, &sysVersion, NULL) ) {
+ //dyld::log("%s has version 0x%08X\n", sysInstallName, sysVersion);
+ if ( altVersion > sysVersion ) {
+ //dyld::log("override found: %s -> %s\n", sysInstallName, dylibFile);
+ // see if there already is an override for this dylib
+ bool entryExists = false;
+ for (std::vector<DylibOverride>::iterator it = sDylibOverrides.begin(); it != sDylibOverrides.end(); ++it) {
+ if ( strcmp(it->installName, sysInstallName) == 0 ) {
+ entryExists = true;
+ uint32_t prevVersion;
+ if ( getDylibVersionAndInstallname(it->override, &prevVersion, NULL) ) {
+ if ( altVersion > prevVersion ) {
+ // found an even newer override
+ free((void*)(it->override));
+ char resolvedPath[PATH_MAX];
+ if ( realpath(dylibFile, resolvedPath) != NULL )
+ it->override = strdup(resolvedPath);
+ else
+ it->override = strdup(dylibFile);
+ break;
+ }
+ }
+ }
+ }
+ if ( ! entryExists ) {
+ DylibOverride entry;
+ entry.installName = strdup(sysInstallName);
+ char resolvedPath[PATH_MAX];
+ if ( realpath(dylibFile, resolvedPath) != NULL )
+ entry.override = strdup(resolvedPath);
+ else
+ entry.override = strdup(dylibFile);
+ sDylibOverrides.push_back(entry);
+ //dyld::log("added override: %s -> %s\n", entry.installName, entry.override);
+ }
+ }
+ }
+ }
+
+}
+
+static void checkDylibOverridesInDir(const char* dirPath)
+{
+ //dyld::log("checkDylibOverridesInDir('%s')\n", dirPath);
+ char dylibPath[PATH_MAX];
+ long dirPathLen = strlcpy(dylibPath, dirPath, PATH_MAX-1);
+ if ( dirPathLen >= PATH_MAX )
+ return;
+ DIR* dirp = opendir(dirPath);
+ if ( dirp != NULL) {
+ dirent entry;
+ dirent* entp = NULL;
+ while ( readdir_r(dirp, &entry, &entp) == 0 ) {
+ if ( entp == NULL )
+ break;
+ if ( entp->d_type != DT_REG )
+ continue;
+ dylibPath[dirPathLen] = '/';
+ dylibPath[dirPathLen+1] = '\0';
+ if ( strlcat(dylibPath, entp->d_name, PATH_MAX) >= PATH_MAX )
+ continue;
+ checkDylibOverride(dylibPath);
+ }
+ closedir(dirp);
+ }
+}
+
+
+static void checkFrameworkOverridesInDir(const char* dirPath)
+{
+ //dyld::log("checkFrameworkOverridesInDir('%s')\n", dirPath);
+ char frameworkPath[PATH_MAX];
+ long dirPathLen = strlcpy(frameworkPath, dirPath, PATH_MAX-1);
+ if ( dirPathLen >= PATH_MAX )
+ return;
+ DIR* dirp = opendir(dirPath);
+ if ( dirp != NULL) {
+ dirent entry;
+ dirent* entp = NULL;
+ while ( readdir_r(dirp, &entry, &entp) == 0 ) {
+ if ( entp == NULL )
+ break;
+ if ( entp->d_type != DT_DIR )
+ continue;
+ frameworkPath[dirPathLen] = '/';
+ frameworkPath[dirPathLen+1] = '\0';
+ int dirNameLen = (int)strlen(entp->d_name);
+ if ( dirNameLen < 11 )
+ continue;
+ if ( strcmp(&entp->d_name[dirNameLen-10], ".framework") != 0 )
+ continue;
+ if ( strlcat(frameworkPath, entp->d_name, PATH_MAX) >= PATH_MAX )
+ continue;
+ if ( strlcat(frameworkPath, "/", PATH_MAX) >= PATH_MAX )
+ continue;
+ if ( strlcat(frameworkPath, entp->d_name, PATH_MAX) >= PATH_MAX )
+ continue;
+ frameworkPath[strlen(frameworkPath)-10] = '\0';
+ checkDylibOverride(frameworkPath);
+ }
+ closedir(dirp);
+ }
+}
+#endif // SUPPORT_VERSIONED_PATHS
+
+
+//
+// Turns a colon separated list of strings into a NULL terminated array
+// of string pointers. If mainExecutableDir param is not NULL,
+// substitutes @loader_path with main executable's dir.
+//
+static const char** parseColonList(const char* list, const char* mainExecutableDir)
+{
+ static const char* sEmptyList[] = { NULL };
+
+ if ( list[0] == '\0' )
+ return sEmptyList;
+
int colonCount = 0;
for(const char* s=list; *s != '\0'; ++s) {
if (*s == ':')
@@ -753,24 +1598,120 @@
char** result = new char*[colonCount+2];
for(const char* s=list; *s != '\0'; ++s) {
if (*s == ':') {
- int len = s-start;
- char* str = new char[len+1];
- strncpy(str, start, len);
- str[len] = '\0';
- start = &s[1];
+ size_t len = s-start;
+ if ( (mainExecutableDir != NULL) && (strncmp(start, "@loader_path/", 13) == 0) ) {
+#if __MAC_OS_X_VERSION_MIN_REQUIRED
+ if ( gLinkContext.processIsRestricted ) {
+ dyld::log("dyld: warning: @loader_path/ ignored in restricted process\n");
+ continue;
+ }
+#endif
+ size_t mainExecDirLen = strlen(mainExecutableDir);
+ char* str = new char[mainExecDirLen+len+1];
+ strcpy(str, mainExecutableDir);
+ strlcat(str, &start[13], mainExecDirLen+len+1);
+ str[mainExecDirLen+len-13] = '\0';
+ start = &s[1];
+ result[index++] = str;
+ }
+ else if ( (mainExecutableDir != NULL) && (strncmp(start, "@executable_path/", 17) == 0) ) {
+#if __MAC_OS_X_VERSION_MIN_REQUIRED
+ if ( gLinkContext.processIsRestricted ) {
+ dyld::log("dyld: warning: @executable_path/ ignored in restricted process\n");
+ continue;
+ }
+#endif
+ size_t mainExecDirLen = strlen(mainExecutableDir);
+ char* str = new char[mainExecDirLen+len+1];
+ strcpy(str, mainExecutableDir);
+ strlcat(str, &start[17], mainExecDirLen+len+1);
+ str[mainExecDirLen+len-17] = '\0';
+ start = &s[1];
+ result[index++] = str;
+ }
+ else {
+ char* str = new char[len+1];
+ strncpy(str, start, len);
+ str[len] = '\0';
+ start = &s[1];
+ result[index++] = str;
+ }
+ }
+ }
+ size_t len = strlen(start);
+ if ( (mainExecutableDir != NULL) && (strncmp(start, "@loader_path/", 13) == 0) ) {
+#if __MAC_OS_X_VERSION_MIN_REQUIRED
+ if ( gLinkContext.processIsRestricted ) {
+ dyld::log("dyld: warning: @loader_path/ ignored in restricted process\n");
+ }
+ else
+#endif
+ {
+ size_t mainExecDirLen = strlen(mainExecutableDir);
+ char* str = new char[mainExecDirLen+len+1];
+ strcpy(str, mainExecutableDir);
+ strlcat(str, &start[13], mainExecDirLen+len+1);
+ str[mainExecDirLen+len-13] = '\0';
result[index++] = str;
}
}
- int len = strlen(start);
- char* str = new char[len+1];
- strcpy(str, start);
- result[index++] = str;
+ else if ( (mainExecutableDir != NULL) && (strncmp(start, "@executable_path/", 17) == 0) ) {
+#if __MAC_OS_X_VERSION_MIN_REQUIRED
+ if ( gLinkContext.processIsRestricted ) {
+ dyld::log("dyld: warning: @executable_path/ ignored in restricted process\n");
+ }
+ else
+#endif
+ {
+ size_t mainExecDirLen = strlen(mainExecutableDir);
+ char* str = new char[mainExecDirLen+len+1];
+ strcpy(str, mainExecutableDir);
+ strlcat(str, &start[17], mainExecDirLen+len+1);
+ str[mainExecDirLen+len-17] = '\0';
+ result[index++] = str;
+ }
+ }
+ else {
+ char* str = new char[len+1];
+ strcpy(str, start);
+ result[index++] = str;
+ }
result[index] = NULL;
+ //dyld::log("parseColonList(%s)\n", list);
+ //for(int i=0; result[i] != NULL; ++i)
+ // dyld::log(" %s\n", result[i]);
return (const char**)result;
}
-
+static void appendParsedColonList(const char* list, const char* mainExecutableDir, const char* const ** storage)
+{
+ const char** newlist = parseColonList(list, mainExecutableDir);
+ if ( *storage == NULL ) {
+ // first time, just set
+ *storage = newlist;
+ }
+ else {
+ // need to append to existing list
+ const char* const* existing = *storage;
+ int count = 0;
+ for(int i=0; existing[i] != NULL; ++i)
+ ++count;
+ for(int i=0; newlist[i] != NULL; ++i)
+ ++count;
+ const char** combinedList = new const char*[count+2];
+ int index = 0;
+ for(int i=0; existing[i] != NULL; ++i)
+ combinedList[index++] = existing[i];
+ for(int i=0; newlist[i] != NULL; ++i)
+ combinedList[index++] = newlist[i];
+ combinedList[index] = NULL;
+ // leak old arrays
+ *storage = combinedList;
+ }
+}
+
+#if __MAC_OS_X_VERSION_MIN_REQUIRED
static void paths_expand_roots(const char **paths, const char *key, const char *val)
{
// assert(val != NULL);
@@ -802,6 +1743,7 @@
}
paths[i-skip] = NULL;
}
+#endif
#if 0
@@ -835,44 +1777,42 @@
}
}
-void processDyldEnvironmentVarible(const char* key, const char* value)
+void processDyldEnvironmentVariable(const char* key, const char* value, const char* mainExecutableDir)
{
if ( strcmp(key, "DYLD_FRAMEWORK_PATH") == 0 ) {
- sEnv.DYLD_FRAMEWORK_PATH = parseColonList(value);
- gSharedCacheDontNotify = true;
+ appendParsedColonList(value, mainExecutableDir, &sEnv.DYLD_FRAMEWORK_PATH);
}
else if ( strcmp(key, "DYLD_FALLBACK_FRAMEWORK_PATH") == 0 ) {
- sEnv.DYLD_FALLBACK_FRAMEWORK_PATH = parseColonList(value);
- gSharedCacheDontNotify = true;
+ appendParsedColonList(value, mainExecutableDir, &sEnv.DYLD_FALLBACK_FRAMEWORK_PATH);
}
else if ( strcmp(key, "DYLD_LIBRARY_PATH") == 0 ) {
- sEnv.DYLD_LIBRARY_PATH = parseColonList(value);
- gSharedCacheDontNotify = true;
+ appendParsedColonList(value, mainExecutableDir, &sEnv.DYLD_LIBRARY_PATH);
}
else if ( strcmp(key, "DYLD_FALLBACK_LIBRARY_PATH") == 0 ) {
- sEnv.DYLD_FALLBACK_LIBRARY_PATH = parseColonList(value);
- gSharedCacheDontNotify = true;
- }
+ appendParsedColonList(value, mainExecutableDir, &sEnv.DYLD_FALLBACK_LIBRARY_PATH);
+ }
+#if SUPPORT_ROOT_PATH
else if ( (strcmp(key, "DYLD_ROOT_PATH") == 0) || (strcmp(key, "DYLD_PATHS_ROOT") == 0) ) {
- gSharedCacheDontNotify = true;
if ( strcmp(value, "/") != 0 ) {
- sEnv.DYLD_ROOT_PATH = parseColonList(value);
- for (int i=0; sEnv.DYLD_ROOT_PATH[i] != NULL; ++i) {
- if ( sEnv.DYLD_ROOT_PATH[i][0] != '/' ) {
+ gLinkContext.rootPaths = parseColonList(value, mainExecutableDir);
+ for (int i=0; gLinkContext.rootPaths[i] != NULL; ++i) {
+ if ( gLinkContext.rootPaths[i][0] != '/' ) {
dyld::warn("DYLD_ROOT_PATH not used because it contains a non-absolute path\n");
- sEnv.DYLD_ROOT_PATH = NULL;
+ gLinkContext.rootPaths = NULL;
break;
}
}
}
- }
+ }
+#endif
else if ( strcmp(key, "DYLD_IMAGE_SUFFIX") == 0 ) {
- gSharedCacheDontNotify = true;
gLinkContext.imageSuffix = value;
}
else if ( strcmp(key, "DYLD_INSERT_LIBRARIES") == 0 ) {
- sEnv.DYLD_INSERT_LIBRARIES = parseColonList(value);
- gSharedCacheDontNotify = true;
+ sEnv.DYLD_INSERT_LIBRARIES = parseColonList(value, NULL);
+#if SUPPORT_ACCELERATE_TABLES
+ sDisableAcceleratorTables = true;
+#endif
}
else if ( strcmp(key, "DYLD_PRINT_OPTS") == 0 ) {
sEnv.DYLD_PRINT_OPTS = true;
@@ -887,7 +1827,7 @@
gLinkContext.preFetchDisabled = true;
}
else if ( strcmp(key, "DYLD_PRINT_LIBRARIES") == 0 ) {
- sEnv.DYLD_PRINT_LIBRARIES = true;
+ gLinkContext.verboseLoading = true;
}
else if ( strcmp(key, "DYLD_PRINT_LIBRARIES_POST_LAUNCH") == 0 ) {
sEnv.DYLD_PRINT_LIBRARIES_POST_LAUNCH = true;
@@ -902,7 +1842,6 @@
// ignore, no longer relevant but some scripts still set it
}
else if ( strcmp(key, "DYLD_NO_FIX_PREBINDING") == 0 ) {
- gSharedCacheDontNotify = true;
}
else if ( strcmp(key, "DYLD_PREBIND_DEBUG") == 0 ) {
gLinkContext.verbosePrebinding = true;
@@ -915,6 +1854,19 @@
}
else if ( strcmp(key, "DYLD_PRINT_STATISTICS") == 0 ) {
sEnv.DYLD_PRINT_STATISTICS = true;
+#if __IPHONE_OS_VERSION_MIN_REQUIRED && !TARGET_IPHONE_SIMULATOR
+ // <rdar://problem/26614838> DYLD_PRINT_STATISTICS no longer logs to xcode console for device apps
+ sForceStderr = true;
+#endif
+ }
+ else if ( strcmp(key, "DYLD_PRINT_TO_STDERR") == 0 ) {
+#if __IPHONE_OS_VERSION_MIN_REQUIRED && !TARGET_IPHONE_SIMULATOR
+ // <rdar://problem/26633440> DYLD_PRINT_STATISTICS no longer logs to xcode console for device apps
+ sForceStderr = true;
+#endif
+ }
+ else if ( strcmp(key, "DYLD_PRINT_STATISTICS_DETAILS") == 0 ) {
+ sEnv.DYLD_PRINT_STATISTICS_DETAILS = true;
}
else if ( strcmp(key, "DYLD_PRINT_SEGMENTS") == 0 ) {
gLinkContext.verboseMapping = true;
@@ -922,17 +1874,36 @@
else if ( strcmp(key, "DYLD_PRINT_BINDINGS") == 0 ) {
gLinkContext.verboseBind = true;
}
+ else if ( strcmp(key, "DYLD_PRINT_WEAK_BINDINGS") == 0 ) {
+ gLinkContext.verboseWeakBind = true;
+ }
else if ( strcmp(key, "DYLD_PRINT_REBASINGS") == 0 ) {
gLinkContext.verboseRebase = true;
}
else if ( strcmp(key, "DYLD_PRINT_APIS") == 0 ) {
gLogAPIs = true;
}
+#if SUPPORT_ACCELERATE_TABLES
+ else if ( strcmp(key, "DYLD_PRINT_APIS_APP") == 0 ) {
+ gLogAppAPIs = true;
+ }
+#endif
else if ( strcmp(key, "DYLD_PRINT_WARNINGS") == 0 ) {
gLinkContext.verboseWarnings = true;
}
+ else if ( strcmp(key, "DYLD_PRINT_RPATHS") == 0 ) {
+ gLinkContext.verboseRPaths = true;
+ }
+ else if ( strcmp(key, "DYLD_PRINT_CS_NOTIFICATIONS") == 0 ) {
+ sEnv.DYLD_PRINT_CS_NOTIFICATIONS = true;
+ }
+ else if ( strcmp(key, "DYLD_PRINT_INTERPOSING") == 0 ) {
+ gLinkContext.verboseInterposing = true;
+ }
+ else if ( strcmp(key, "DYLD_PRINT_CODE_SIGNATURES") == 0 ) {
+ gLinkContext.verboseCodeSignatures = true;
+ }
else if ( strcmp(key, "DYLD_SHARED_REGION") == 0 ) {
- gSharedCacheDontNotify = true;
if ( strcmp(value, "private") == 0 ) {
gLinkContext.sharedRegionMode = ImageLoader::kUsePrivateSharedRegion;
}
@@ -949,8 +1920,15 @@
dyld::warn("unknown option to DYLD_SHARED_REGION. Valid options are: use, private, avoid\n");
}
}
+#if DYLD_SHARED_CACHE_SUPPORT
+ else if ( strcmp(key, "DYLD_SHARED_CACHE_DIR") == 0 ) {
+ sSharedCacheDir = value;
+ }
+ else if ( strcmp(key, "DYLD_SHARED_CACHE_DONT_VALIDATE") == 0 ) {
+ sSharedCacheIgnoreInodeAndTimeStamp = true;
+ }
+#endif
else if ( strcmp(key, "DYLD_IGNORE_PREBINDING") == 0 ) {
- gSharedCacheDontNotify = true;
if ( strcmp(value, "all") == 0 ) {
gLinkContext.prebindUsage = ImageLoader::kUseNoPrebinding;
}
@@ -967,12 +1945,119 @@
dyld::warn("unknown option to DYLD_IGNORE_PREBINDING. Valid options are: all, app, nonsplit\n");
}
}
+#if SUPPORT_VERSIONED_PATHS
+ else if ( strcmp(key, "DYLD_VERSIONED_LIBRARY_PATH") == 0 ) {
+ appendParsedColonList(value, mainExecutableDir, &sEnv.DYLD_VERSIONED_LIBRARY_PATH);
+ #if SUPPORT_ACCELERATE_TABLES
+ sDisableAcceleratorTables = true;
+ #endif
+ }
+ else if ( strcmp(key, "DYLD_VERSIONED_FRAMEWORK_PATH") == 0 ) {
+ appendParsedColonList(value, mainExecutableDir, &sEnv.DYLD_VERSIONED_FRAMEWORK_PATH);
+ #if SUPPORT_ACCELERATE_TABLES
+ sDisableAcceleratorTables = true;
+ #endif
+ }
+#endif
+#if !TARGET_IPHONE_SIMULATOR
+ else if ( (strcmp(key, "DYLD_PRINT_TO_FILE") == 0) && (mainExecutableDir == NULL) ) {
+ int fd = open(value, O_WRONLY | O_CREAT | O_APPEND, 0644);
+ if ( fd != -1 ) {
+ sLogfile = fd;
+ sLogToFile = true;
+ }
+ else {
+ dyld::log("dyld: could not open DYLD_PRINT_TO_FILE='%s', errno=%d\n", value, errno);
+ }
+ }
+#endif
else {
dyld::warn("unknown environment variable: %s\n", key);
}
}
+#if SUPPORT_LC_DYLD_ENVIRONMENT
+static void checkLoadCommandEnvironmentVariables()
+{
+ // <rdar://problem/8440934> Support augmenting dyld environment variables in load commands
+ const uint32_t cmd_count = sMainExecutableMachHeader->ncmds;
+ const struct load_command* const cmds = (struct load_command*)(((char*)sMainExecutableMachHeader)+sizeof(macho_header));
+ const struct load_command* cmd = cmds;
+ for (uint32_t i = 0; i < cmd_count; ++i) {
+ switch (cmd->cmd) {
+ case LC_DYLD_ENVIRONMENT:
+ {
+ const struct dylinker_command* envcmd = (struct dylinker_command*)cmd;
+ const char* keyEqualsValue = (char*)envcmd + envcmd->name.offset;
+ char mainExecutableDir[strlen(sExecPath)+2];
+ strcpy(mainExecutableDir, sExecPath);
+ char* lastSlash = strrchr(mainExecutableDir, '/');
+ if ( lastSlash != NULL)
+ lastSlash[1] = '\0';
+ // only process variables that start with DYLD_ and end in _PATH
+ if ( (strncmp(keyEqualsValue, "DYLD_", 5) == 0) ) {
+ const char* equals = strchr(keyEqualsValue, '=');
+ if ( equals != NULL ) {
+ if ( strncmp(&equals[-5], "_PATH", 5) == 0 ) {
+ const char* value = &equals[1];
+ const size_t keyLen = equals-keyEqualsValue;
+ // <rdar://problem/22799635> don't let malformed load command overflow stack
+ if ( keyLen < 40 ) {
+ char key[keyLen+1];
+ strncpy(key, keyEqualsValue, keyLen);
+ key[keyLen] = '\0';
+ //dyld::log("processing: %s\n", keyEqualsValue);
+ //dyld::log("mainExecutableDir: %s\n", mainExecutableDir);
+ processDyldEnvironmentVariable(key, value, mainExecutableDir);
+ }
+ }
+ }
+ }
+ }
+ break;
+ }
+ cmd = (const struct load_command*)(((char*)cmd)+cmd->cmdsize);
+ }
+}
+#endif // SUPPORT_LC_DYLD_ENVIRONMENT
+
+
+static bool hasCodeSignatureLoadCommand(const macho_header* mh)
+{
+ const uint32_t cmd_count = mh->ncmds;
+ const struct load_command* const cmds = (struct load_command*)(((char*)mh)+sizeof(macho_header));
+ const struct load_command* cmd = cmds;
+ for (uint32_t i = 0; i < cmd_count; ++i) {
+ if (cmd->cmd == LC_CODE_SIGNATURE)
+ return true;
+ cmd = (const struct load_command*)(((char*)cmd)+cmd->cmdsize);
+ }
+ return false;
+}
+
+
+#if SUPPORT_VERSIONED_PATHS
+static void checkVersionedPaths()
+{
+ // search DYLD_VERSIONED_LIBRARY_PATH directories for dylibs and check if they are newer
+ if ( sEnv.DYLD_VERSIONED_LIBRARY_PATH != NULL ) {
+ for(const char* const* lp = sEnv.DYLD_VERSIONED_LIBRARY_PATH; *lp != NULL; ++lp) {
+ checkDylibOverridesInDir(*lp);
+ }
+ }
+
+ // search DYLD_VERSIONED_FRAMEWORK_PATH directories for dylibs and check if they are newer
+ if ( sEnv.DYLD_VERSIONED_FRAMEWORK_PATH != NULL ) {
+ for(const char* const* fp = sEnv.DYLD_VERSIONED_FRAMEWORK_PATH; *fp != NULL; ++fp) {
+ checkFrameworkOverridesInDir(*fp);
+ }
+ }
+}
+#endif
+
+
+#if __MAC_OS_X_VERSION_MIN_REQUIRED
//
// For security, setuid programs ignore DYLD_* environment variables.
// Additionally, the DYLD_* enviroment variables are removed
@@ -980,8 +2065,9 @@
//
static void pruneEnvironmentVariables(const char* envp[], const char*** applep)
{
- // setuit binaries don't trigger a cache rebuild
- gSharedCacheDontNotify = true;
+#if SUPPORT_LC_DYLD_ENVIRONMENT
+ checkLoadCommandEnvironmentVariables();
+#endif
// delete all DYLD_* and LD_LIBRARY_PATH environment variables
int removedCount = 0;
@@ -995,119 +2081,215 @@
}
}
*d++ = NULL;
-
// slide apple parameters
if ( removedCount > 0 ) {
*applep = d;
do {
*d = d[removedCount];
} while ( *d++ != NULL );
+ for(int i=0; i < removedCount; ++i)
+ *d++ = NULL;
}
// disable framework and library fallback paths for setuid binaries rdar://problem/4589305
sEnv.DYLD_FALLBACK_FRAMEWORK_PATH = NULL;
sEnv.DYLD_FALLBACK_LIBRARY_PATH = NULL;
-}
-
-
-static void checkEnvironmentVariables(const char* envp[], bool ignoreEnviron)
-{
- const char* home = NULL;
+
+ if ( removedCount > 0 )
+ strlcat(sLoadingCrashMessage, ", ignoring DYLD_* env vars", sizeof(sLoadingCrashMessage));
+}
+#endif
+
+static void defaultUninitializedFallbackPaths(const char* envp[])
+{
+#if __MAC_OS_X_VERSION_MIN_REQUIRED
+ if ( gLinkContext.processIsRestricted ) {
+ sEnv.DYLD_FALLBACK_FRAMEWORK_PATH = sRestrictedFrameworkFallbackPaths;
+ sEnv.DYLD_FALLBACK_LIBRARY_PATH = sRestrictedLibraryFallbackPaths;
+ return;
+ }
+
+ // default value for DYLD_FALLBACK_FRAMEWORK_PATH, if not set in environment
+ const char* home = _simple_getenv(envp, "HOME");;
+ if ( sEnv.DYLD_FALLBACK_FRAMEWORK_PATH == NULL ) {
+ const char** fpaths = sFrameworkFallbackPaths;
+ if ( home == NULL )
+ removePathWithPrefix(fpaths, "$HOME");
+ else
+ paths_expand_roots(fpaths, "$HOME", home);
+ sEnv.DYLD_FALLBACK_FRAMEWORK_PATH = fpaths;
+ }
+
+ // default value for DYLD_FALLBACK_LIBRARY_PATH, if not set in environment
+ if ( sEnv.DYLD_FALLBACK_LIBRARY_PATH == NULL ) {
+ const char** lpaths = sLibraryFallbackPaths;
+ if ( home == NULL )
+ removePathWithPrefix(lpaths, "$HOME");
+ else
+ paths_expand_roots(lpaths, "$HOME", home);
+ sEnv.DYLD_FALLBACK_LIBRARY_PATH = lpaths;
+ }
+#else
+ if ( sEnv.DYLD_FALLBACK_FRAMEWORK_PATH == NULL )
+ sEnv.DYLD_FALLBACK_FRAMEWORK_PATH = sFrameworkFallbackPaths;
+
+ if ( sEnv.DYLD_FALLBACK_LIBRARY_PATH == NULL )
+ sEnv.DYLD_FALLBACK_LIBRARY_PATH = sLibraryFallbackPaths;
+#endif
+}
+
+
+static void checkEnvironmentVariables(const char* envp[])
+{
+ if ( sEnvMode == envNone )
+ return;
const char** p;
for(p = envp; *p != NULL; p++) {
const char* keyEqualsValue = *p;
if ( strncmp(keyEqualsValue, "DYLD_", 5) == 0 ) {
const char* equals = strchr(keyEqualsValue, '=');
- if ( (equals != NULL) && !ignoreEnviron ) {
+ if ( equals != NULL ) {
+ strlcat(sLoadingCrashMessage, "\n", sizeof(sLoadingCrashMessage));
+ strlcat(sLoadingCrashMessage, keyEqualsValue, sizeof(sLoadingCrashMessage));
const char* value = &equals[1];
- const int keyLen = equals-keyEqualsValue;
+ const size_t keyLen = equals-keyEqualsValue;
char key[keyLen+1];
strncpy(key, keyEqualsValue, keyLen);
key[keyLen] = '\0';
- processDyldEnvironmentVarible(key, value);
- }
- }
- else if ( strncmp(keyEqualsValue, "HOME=", 5) == 0 ) {
- home = &keyEqualsValue[5];
+ if ( (sEnvMode == envPrintOnly) && (strncmp(key, "DYLD_PRINT_", 11) != 0) )
+ continue;
+ processDyldEnvironmentVariable(key, value, NULL);
+ }
}
else if ( strncmp(keyEqualsValue, "LD_LIBRARY_PATH=", 16) == 0 ) {
const char* path = &keyEqualsValue[16];
- sEnv.LD_LIBRARY_PATH = parseColonList(path);
- }
- }
-
- // default value for DYLD_FALLBACK_FRAMEWORK_PATH, if not set in environment
- if ( sEnv.DYLD_FALLBACK_FRAMEWORK_PATH == NULL ) {
- const char** paths = sFrameworkFallbackPaths;
- if ( home == NULL )
- removePathWithPrefix(paths, "$HOME");
- else
- paths_expand_roots(paths, "$HOME", home);
- sEnv.DYLD_FALLBACK_FRAMEWORK_PATH = paths;
- }
-
- // default value for DYLD_FALLBACK_LIBRARY_PATH, if not set in environment
- if ( sEnv.DYLD_FALLBACK_LIBRARY_PATH == NULL ) {
- const char** paths = sLibraryFallbackPaths;
- if ( home == NULL )
- removePathWithPrefix(paths, "$HOME");
- else
- paths_expand_roots(paths, "$HOME", home);
- sEnv.DYLD_FALLBACK_LIBRARY_PATH = paths;
- }
-}
-
-
-static void getHostInfo()
-{
-#if 1
+ sEnv.LD_LIBRARY_PATH = parseColonList(path, NULL);
+ }
+ }
+
+#if SUPPORT_LC_DYLD_ENVIRONMENT
+ checkLoadCommandEnvironmentVariables();
+#endif // SUPPORT_LC_DYLD_ENVIRONMENT
+
+#if SUPPORT_ROOT_PATH
+ // <rdar://problem/11281064> DYLD_IMAGE_SUFFIX and DYLD_ROOT_PATH cannot be used together
+ if ( (gLinkContext.imageSuffix != NULL) && (gLinkContext.rootPaths != NULL) ) {
+ dyld::warn("Ignoring DYLD_IMAGE_SUFFIX because DYLD_ROOT_PATH is used.\n");
+ gLinkContext.imageSuffix = NULL;
+ }
+#endif
+}
+
+#if __x86_64__ && DYLD_SHARED_CACHE_SUPPORT
+static bool isGCProgram(const macho_header* mh, uintptr_t slide)
+{
+ const uint32_t cmd_count = mh->ncmds;
+ const struct load_command* const cmds = (struct load_command*)(((char*)mh)+sizeof(macho_header));
+ const struct load_command* cmd = cmds;
+ for (uint32_t i = 0; i < cmd_count; ++i) {
+ switch (cmd->cmd) {
+ case LC_SEGMENT_COMMAND:
+ {
+ const struct macho_segment_command* seg = (struct macho_segment_command*)cmd;
+ if (strcmp(seg->segname, "__DATA") == 0) {
+ const struct macho_section* const sectionsStart = (struct macho_section*)((char*)seg + sizeof(struct macho_segment_command));
+ const struct macho_section* const sectionsEnd = §ionsStart[seg->nsects];
+ for (const struct macho_section* sect=sectionsStart; sect < sectionsEnd; ++sect) {
+ if (strncmp(sect->sectname, "__objc_imageinfo", 16) == 0) {
+ const uint32_t* objcInfo = (uint32_t*)(sect->addr + slide);
+ return (objcInfo[1] & 6); // 6 = (OBJC_IMAGE_SUPPORTS_GC | OBJC_IMAGE_REQUIRES_GC)
+ }
+ }
+ }
+ }
+ break;
+ }
+ cmd = (const struct load_command*)(((char*)cmd)+cmd->cmdsize);
+ }
+ return false;
+}
+#endif
+
+static void getHostInfo(const macho_header* mainExecutableMH, uintptr_t mainExecutableSlide)
+{
+#if CPU_SUBTYPES_SUPPORTED
+#if __ARM_ARCH_7K__
+ sHostCPU = CPU_TYPE_ARM;
+ sHostCPUsubtype = CPU_SUBTYPE_ARM_V7K;
+#elif __ARM_ARCH_7A__
+ sHostCPU = CPU_TYPE_ARM;
+ sHostCPUsubtype = CPU_SUBTYPE_ARM_V7;
+#elif __ARM_ARCH_6K__
+ sHostCPU = CPU_TYPE_ARM;
+ sHostCPUsubtype = CPU_SUBTYPE_ARM_V6;
+#elif __ARM_ARCH_7F__
+ sHostCPU = CPU_TYPE_ARM;
+ sHostCPUsubtype = CPU_SUBTYPE_ARM_V7F;
+#elif __ARM_ARCH_7S__
+ sHostCPU = CPU_TYPE_ARM;
+ sHostCPUsubtype = CPU_SUBTYPE_ARM_V7S;
+#else
struct host_basic_info info;
mach_msg_type_number_t count = HOST_BASIC_INFO_COUNT;
mach_port_t hostPort = mach_host_self();
kern_return_t result = host_info(hostPort, HOST_BASIC_INFO, (host_info_t)&info, &count);
- mach_port_deallocate(mach_task_self(), hostPort);
if ( result != KERN_SUCCESS )
throw "host_info() failed";
-
sHostCPU = info.cpu_type;
sHostCPUsubtype = info.cpu_subtype;
-#else
- size_t valSize = sizeof(sHostCPU);
- if (sysctlbyname ("hw.cputype", &sHostCPU, &valSize, NULL, 0) != 0)
- throw "sysctlbyname(hw.cputype) failed";
- valSize = sizeof(sHostCPUsubtype);
- if (sysctlbyname ("hw.cpusubtype", &sHostCPUsubtype, &valSize, NULL, 0) != 0)
- throw "sysctlbyname(hw.cpusubtype) failed";
+ mach_port_deallocate(mach_task_self(), hostPort);
+ #if __x86_64__
+ #if DYLD_SHARED_CACHE_SUPPORT
+ sHaswell = (sHostCPUsubtype == CPU_SUBTYPE_X86_64_H);
+ // <rdar://problem/18528074> x86_64h: Fall back to the x86_64 slice if an app requires GC.
+ if ( sHaswell ) {
+ if ( isGCProgram(mainExecutableMH, mainExecutableSlide) ) {
+ // When running a GC program on a haswell machine, don't use and 'h slices
+ sHostCPUsubtype = CPU_SUBTYPE_X86_64_ALL;
+ sHaswell = false;
+ gLinkContext.sharedRegionMode = ImageLoader::kDontUseSharedRegion;
+ }
+ }
+ #endif
+ #endif
+#endif
#endif
}
static void checkSharedRegionDisable()
{
- #if __ppc__ || __i386__
+#if __MAC_OS_X_VERSION_MIN_REQUIRED
// if main executable has segments that overlap the shared region,
// then disable using the shared region
- if ( sMainExecutable->overlapsWithAddressRange((void*)0x90000000, (void*)0xAFFFFFFF) ) {
+ if ( sMainExecutable->overlapsWithAddressRange((void*)(uintptr_t)SHARED_REGION_BASE, (void*)(uintptr_t)(SHARED_REGION_BASE + SHARED_REGION_SIZE)) ) {
gLinkContext.sharedRegionMode = ImageLoader::kDontUseSharedRegion;
if ( gLinkContext.verboseMapping )
dyld::warn("disabling shared region because main executable overlaps\n");
}
- #endif
+#if __i386__
+ if ( gLinkContext.processIsRestricted ) {
+ // <rdar://problem/15280847> use private or no shared region for suid processes
+ gLinkContext.sharedRegionMode = ImageLoader::kUsePrivateSharedRegion;
+ }
+#endif
+#endif
+ // iPhoneOS cannot run without shared region
}
bool validImage(const ImageLoader* possibleImage)
{
- const unsigned int imageCount = sAllImages.size();
- for(unsigned int i=0; i < imageCount; ++i) {
- if ( possibleImage == sAllImages[i] ) {
- return true;
- }
- }
+ const size_t imageCount = sAllImages.size();
+ for(size_t i=0; i < imageCount; ++i) {
+ if ( possibleImage == sAllImages[i] ) {
+ return true;
+ }
+ }
return false;
}
uint32_t getImageCount()
{
- return sAllImages.size();
+ return (uint32_t)sAllImages.size();
}
ImageLoader* getIndexedImage(unsigned int index)
@@ -1119,70 +2301,41 @@
ImageLoader* findImageByMachHeader(const struct mach_header* target)
{
- const unsigned int imageCount = sAllImages.size();
- for(unsigned int i=0; i < imageCount; ++i) {
- ImageLoader* anImage = sAllImages[i];
- if ( anImage->machHeader() == target )
+ return findMappedRange((uintptr_t)target);
+}
+
+
+ImageLoader* findImageContainingAddress(const void* addr)
+{
+ #if SUPPORT_ACCELERATE_TABLES
+ if ( sAllCacheImagesProxy != NULL ) {
+ const mach_header* mh;
+ const char* path;
+ unsigned index;
+ if ( sAllCacheImagesProxy->addressInCache(addr, &mh, &path, &index) )
+ return sAllCacheImagesProxy;
+ }
+ #endif
+ return findMappedRange((uintptr_t)addr);
+}
+
+
+ImageLoader* findImageContainingSymbol(const void* symbol)
+{
+ for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
+ ImageLoader* anImage = *it;
+ if ( anImage->containsSymbol(symbol) )
return anImage;
}
return NULL;
}
-ImageLoader* findImageContainingAddress(const void* addr)
-{
-#if FIND_STATS
- static int cacheHit = 0;
- static int cacheMiss = 0;
- static int cacheNotMacho = 0;
- if ( ((cacheHit+cacheMiss+cacheNotMacho) % 100) == 0 )
- dyld::log("findImageContainingAddress(): cache hit = %d, miss = %d, unknown = %d\n", cacheHit, cacheMiss, cacheNotMacho);
-#endif
- // first look in image where last address was found rdar://problem/3685517
- if ( (sLastImageByAddressCache != NULL) && sLastImageByAddressCache->containsAddress(addr) ) {
-#if FIND_STATS
- ++cacheHit;
-#endif
- return sLastImageByAddressCache;
- }
- // do exhastive search
- // todo: consider maintaining a list sorted by address ranges and do a binary search on that
- const unsigned int imageCount = sAllImages.size();
- for(unsigned int i=0; i < imageCount; ++i) {
- ImageLoader* anImage = sAllImages[i];
- if ( anImage->containsAddress(addr) ) {
- sLastImageByAddressCache = anImage;
-#if FIND_STATS
- ++cacheMiss;
-#endif
- return anImage;
- }
- }
-#if FIND_STATS
- ++cacheNotMacho;
-#endif
- return NULL;
-}
-
-ImageLoader* findImageContainingAddressThreadSafe(const void* addr)
-{
- // do exhastive search
- // todo: consider maintaining a list sorted by address ranges and do a binary search on that
- const unsigned int imageCount = sAllImages.size();
- for(unsigned int i=0; i < imageCount; ++i) {
- ImageLoader* anImage = sAllImages[i];
- if ( anImage->containsAddress(addr) ) {
- return anImage;
- }
- }
- return NULL;
-}
-
void forEachImageDo( void (*callback)(ImageLoader*, void* userData), void* userData)
{
- const unsigned int imageCount = sAllImages.size();
- for(unsigned int i=0; i < imageCount; ++i) {
+ const size_t imageCount = sAllImages.size();
+ for(size_t i=0; i < imageCount; ++i) {
ImageLoader* anImage = sAllImages[i];
(*callback)(anImage, userData);
}
@@ -1190,8 +2343,8 @@
ImageLoader* findLoadedImage(const struct stat& stat_buf)
{
- const unsigned int imageCount = sAllImages.size();
- for(unsigned int i=0; i < imageCount; ++i){
+ const size_t imageCount = sAllImages.size();
+ for(size_t i=0; i < imageCount; ++i){
ImageLoader* anImage = sAllImages[i];
if ( anImage->statMatch(stat_buf) )
return anImage;
@@ -1202,7 +2355,7 @@
// based on ANSI-C strstr()
static const char* strrstr(const char* str, const char* sub)
{
- const int sublen = strlen(sub);
+ const size_t sublen = strlen(sub);
for(const char* p = &str[strlen(str)]; p != str; --p) {
if ( strncmp(p, sub, sublen) == 0 )
return p;
@@ -1232,7 +2385,7 @@
const char* frameworkStart = &dirStart[1];
if ( dirStart == path )
--frameworkStart;
- int len = dirDot - frameworkStart;
+ size_t len = dirDot - frameworkStart;
char framework[len+1];
strncpy(framework, frameworkStart, len);
framework[len] = '\0';
@@ -1285,34 +2438,76 @@
//
-//
-// 32-bit PowerPC sub-type lists
+#if __arm__
+//
+// ARM sub-type lists
//
-const int kPPC_RowCount = 4;
-static const cpu_subtype_t kPPC32[kPPC_RowCount][6] = {
- // G5 can run any code
- { CPU_SUBTYPE_POWERPC_970, CPU_SUBTYPE_POWERPC_7450, CPU_SUBTYPE_POWERPC_7400, CPU_SUBTYPE_POWERPC_750, CPU_SUBTYPE_POWERPC_ALL, CPU_SUBTYPE_END_OF_LIST },
-
- // G4 can run all but G5 code
- { CPU_SUBTYPE_POWERPC_7450, CPU_SUBTYPE_POWERPC_7400, CPU_SUBTYPE_POWERPC_750, CPU_SUBTYPE_POWERPC_ALL, CPU_SUBTYPE_END_OF_LIST, CPU_SUBTYPE_END_OF_LIST },
- { CPU_SUBTYPE_POWERPC_7400, CPU_SUBTYPE_POWERPC_7450, CPU_SUBTYPE_POWERPC_750, CPU_SUBTYPE_POWERPC_ALL, CPU_SUBTYPE_END_OF_LIST, CPU_SUBTYPE_END_OF_LIST },
-
- // G3 cannot run G4 or G5 code
- { CPU_SUBTYPE_POWERPC_750, CPU_SUBTYPE_POWERPC_ALL, CPU_SUBTYPE_END_OF_LIST, CPU_SUBTYPE_END_OF_LIST, CPU_SUBTYPE_END_OF_LIST, CPU_SUBTYPE_END_OF_LIST }
+const int kARM_RowCount = 8;
+static const cpu_subtype_t kARM[kARM_RowCount][9] = {
+
+ // armv7f can run: v7f, v7, v6, v5, and v4
+ { CPU_SUBTYPE_ARM_V7F, CPU_SUBTYPE_ARM_V7, CPU_SUBTYPE_ARM_V6, CPU_SUBTYPE_ARM_V5TEJ, CPU_SUBTYPE_ARM_V4T, CPU_SUBTYPE_ARM_ALL, CPU_SUBTYPE_END_OF_LIST },
+
+ // armv7k can run: v7k
+ { CPU_SUBTYPE_ARM_V7K, CPU_SUBTYPE_END_OF_LIST },
+
+ // armv7s can run: v7s, v7, v7f, v7k, v6, v5, and v4
+ { CPU_SUBTYPE_ARM_V7S, CPU_SUBTYPE_ARM_V7, CPU_SUBTYPE_ARM_V7F, CPU_SUBTYPE_ARM_V6, CPU_SUBTYPE_ARM_V5TEJ, CPU_SUBTYPE_ARM_V4T, CPU_SUBTYPE_ARM_ALL, CPU_SUBTYPE_END_OF_LIST },
+
+ // armv7 can run: v7, v6, v5, and v4
+ { CPU_SUBTYPE_ARM_V7, CPU_SUBTYPE_ARM_V6, CPU_SUBTYPE_ARM_V5TEJ, CPU_SUBTYPE_ARM_V4T, CPU_SUBTYPE_ARM_ALL, CPU_SUBTYPE_END_OF_LIST },
+
+ // armv6 can run: v6, v5, and v4
+ { CPU_SUBTYPE_ARM_V6, CPU_SUBTYPE_ARM_V5TEJ, CPU_SUBTYPE_ARM_V4T, CPU_SUBTYPE_ARM_ALL, CPU_SUBTYPE_END_OF_LIST, CPU_SUBTYPE_END_OF_LIST },
+
+ // xscale can run: xscale, v5, and v4
+ { CPU_SUBTYPE_ARM_XSCALE, CPU_SUBTYPE_ARM_V5TEJ, CPU_SUBTYPE_ARM_V4T, CPU_SUBTYPE_ARM_ALL, CPU_SUBTYPE_END_OF_LIST, CPU_SUBTYPE_END_OF_LIST },
+
+ // armv5 can run: v5 and v4
+ { CPU_SUBTYPE_ARM_V5TEJ, CPU_SUBTYPE_ARM_V4T, CPU_SUBTYPE_ARM_ALL, CPU_SUBTYPE_END_OF_LIST, CPU_SUBTYPE_END_OF_LIST, CPU_SUBTYPE_END_OF_LIST },
+
+ // armv4 can run: v4
+ { CPU_SUBTYPE_ARM_V4T, CPU_SUBTYPE_ARM_ALL, CPU_SUBTYPE_END_OF_LIST, CPU_SUBTYPE_END_OF_LIST, CPU_SUBTYPE_END_OF_LIST, CPU_SUBTYPE_END_OF_LIST },
};
-
+#endif
+
+#if __x86_64__
+//
+// x86_64 sub-type lists
+//
+const int kX86_64_RowCount = 2;
+static const cpu_subtype_t kX86_64[kX86_64_RowCount][5] = {
+
+ // x86_64h can run: x86_64h, x86_64h(lib), x86_64(lib), and x86_64
+ { CPU_SUBTYPE_X86_64_H, CPU_SUBTYPE_LIB64|CPU_SUBTYPE_X86_64_H, CPU_SUBTYPE_LIB64|CPU_SUBTYPE_X86_64_ALL, CPU_SUBTYPE_X86_64_ALL, CPU_SUBTYPE_END_OF_LIST },
+
+ // x86_64 can run: x86_64(lib) and x86_64
+ { CPU_SUBTYPE_X86_64_ALL, CPU_SUBTYPE_LIB64|CPU_SUBTYPE_X86_64_ALL, CPU_SUBTYPE_END_OF_LIST },
+
+};
+#endif
// scan the tables above to find the cpu-sub-type-list for this machine
static const cpu_subtype_t* findCPUSubtypeList(cpu_type_t cpu, cpu_subtype_t subtype)
{
switch (cpu) {
- case CPU_TYPE_POWERPC:
- for (int i=0; i < kPPC_RowCount ; ++i) {
- if ( kPPC32[i][0] == subtype )
- return kPPC32[i];
+#if __arm__
+ case CPU_TYPE_ARM:
+ for (int i=0; i < kARM_RowCount ; ++i) {
+ if ( kARM[i][0] == subtype )
+ return kARM[i];
}
break;
+#endif
+#if __x86_64__
+ case CPU_TYPE_X86_64:
+ for (int i=0; i < kX86_64_RowCount ; ++i) {
+ if ( kX86_64[i][0] == subtype )
+ return kX86_64[i];
+ }
+ break;
+#endif
}
return NULL;
}
@@ -1359,13 +2554,24 @@
for(uint32_t i=0; i < OSSwapBigToHostInt32(fh->nfat_arch); ++i) {
if ( (cpu_type_t)OSSwapBigToHostInt32(archs[i].cputype) == cpu) {
switch (cpu) {
- case CPU_TYPE_POWERPC:
- if ( (cpu_subtype_t)OSSwapBigToHostInt32(archs[i].cpusubtype) == CPU_SUBTYPE_POWERPC_ALL ) {
+#if __arm__
+ case CPU_TYPE_ARM:
+ if ( (cpu_subtype_t)OSSwapBigToHostInt32(archs[i].cpusubtype) == CPU_SUBTYPE_ARM_ALL ) {
*offset = OSSwapBigToHostInt32(archs[i].offset);
*len = OSSwapBigToHostInt32(archs[i].size);
return true;
}
break;
+#endif
+#if __x86_64__
+ case CPU_TYPE_X86_64:
+ if ( (cpu_subtype_t)OSSwapBigToHostInt32(archs[i].cpusubtype) == CPU_SUBTYPE_X86_64_ALL ) {
+ *offset = OSSwapBigToHostInt32(archs[i].offset);
+ *len = OSSwapBigToHostInt32(archs[i].size);
+ return true;
+ }
+ break;
+#endif
}
}
}
@@ -1373,6 +2579,66 @@
}
#endif // CPU_SUBTYPES_SUPPORTED
+
+
+//
+// Validate the fat_header and fat_arch array:
+//
+// 1) arch count would not cause array to extend past 4096 byte read buffer
+// 2) no slice overlaps the fat_header and arch array
+// 3) arch list does not contain duplicate cputype/cpusubtype tuples
+// 4) arch list does not have two overlapping slices.
+//
+static bool fatValidate(const fat_header* fh)
+{
+ if ( fh->magic != OSSwapBigToHostInt32(FAT_MAGIC) )
+ return false;
+
+ // since only first 4096 bytes of file read, we can only handle up to 204 slices.
+ const uint32_t sliceCount = OSSwapBigToHostInt32(fh->nfat_arch);
+ if ( sliceCount > 204 )
+ return false;
+
+ // compare all slices looking for conflicts
+ const fat_arch* archs = (fat_arch*)(((char*)fh)+sizeof(fat_header));
+ for (uint32_t i=0; i < sliceCount; ++i) {
+ uint32_t i_offset = OSSwapBigToHostInt32(archs[i].offset);
+ uint32_t i_size = OSSwapBigToHostInt32(archs[i].size);
+ uint32_t i_cputype = OSSwapBigToHostInt32(archs[i].cputype);
+ uint32_t i_cpusubtype = OSSwapBigToHostInt32(archs[i].cpusubtype);
+ uint32_t i_end = i_offset + i_size;
+ // slice cannot overlap with header
+ if ( i_offset < 4096 )
+ return false;
+ // slice size cannot overflow
+ if ( i_end < i_offset )
+ return false;
+ for (uint32_t j=i+1; j < sliceCount; ++j) {
+ uint32_t j_offset = OSSwapBigToHostInt32(archs[j].offset);
+ uint32_t j_size = OSSwapBigToHostInt32(archs[j].size);
+ uint32_t j_cputype = OSSwapBigToHostInt32(archs[j].cputype);
+ uint32_t j_cpusubtype = OSSwapBigToHostInt32(archs[j].cpusubtype);
+ uint32_t j_end = j_offset + j_size;
+ // duplicate slices types not allowed
+ if ( (i_cputype == j_cputype) && (i_cpusubtype == j_cpusubtype) )
+ return false;
+ // slice size cannot overflow
+ if ( j_end < j_offset )
+ return false;
+ // check for overlap of slices
+ if ( i_offset <= j_offset ) {
+ if ( j_offset < i_end )
+ return false; // j overlaps end of i
+ }
+ else {
+ // j overlaps end of i
+ if ( i_offset < j_end )
+ return false; // i overlaps end of j
+ }
+ }
+ }
+ return true;
+}
//
// A fat file may contain multiple sub-images for the same cpu-type,
@@ -1381,6 +2647,9 @@
//
static bool fatFindBest(const fat_header* fh, uint64_t* offset, uint64_t* len)
{
+ if ( !fatValidate(fh) )
+ return false;
+
#if CPU_SUBTYPES_SUPPORTED
// assume all dylibs loaded must have same cpu type as main executable
const cpu_type_t cpu = sMainExecutableMachHeader->cputype;
@@ -1391,9 +2660,11 @@
const cpu_subtype_t* subTypePreferenceList = findCPUSubtypeList(cpu, sHostCPUsubtype);
// use ordered list to find best sub-image in fat file
- if ( subTypePreferenceList != NULL )
- return fatFindBestFromOrderedList(cpu, subTypePreferenceList, fh, offset, len);
-
+ if ( subTypePreferenceList != NULL ) {
+ if ( fatFindBestFromOrderedList(cpu, subTypePreferenceList, fh, offset, len) )
+ return true;
+ }
+
// if running cpu is not in list, try for an exact match
if ( fatFindExactMatch(cpu, sHostCPUsubtype, fh, offset, len) )
return true;
@@ -1420,7 +2691,7 @@
//
// This is used to validate if a non-fat (aka thin or raw) mach-o file can be used
// on the current processor. //
-bool isCompatibleMachO(const uint8_t* firstPage)
+bool isCompatibleMachO(const uint8_t* firstPage, const char* path)
{
#if CPU_SUBTYPES_SUPPORTED
// It is deemed compatible if any of the following are true:
@@ -1440,7 +2711,7 @@
return true;
}
// have list and not in list, so not compatible
- throw "incompatible cpu-subtype";
+ throwf("incompatible cpu-subtype: 0x%08X in %s", mh->cpusubtype, path);
}
// unknown cpu sub-type, but if exact match for current subtype then ok to use
if ( mh->cpusubtype == sHostCPUsubtype )
@@ -1449,12 +2720,6 @@
// cpu type has no ordered list of subtypes
switch (mh->cputype) {
- case CPU_TYPE_POWERPC:
- // allow _ALL to be used by any client
- if ( mh->cpusubtype == CPU_SUBTYPE_POWERPC_ALL )
- return true;
- break;
- case CPU_TYPE_POWERPC64:
case CPU_TYPE_I386:
case CPU_TYPE_X86_64:
// subtypes are not used or these architectures
@@ -1480,47 +2745,115 @@
// The kernel maps in main executable before dyld gets control. We need to
// make an ImageLoader* for the already mapped in main executable.
-static ImageLoader* instantiateFromLoadedImage(const struct mach_header* mh, uintptr_t slide, const char* path)
+static ImageLoaderMachO* instantiateFromLoadedImage(const macho_header* mh, uintptr_t slide, const char* path)
{
// try mach-o loader
- if ( isCompatibleMachO((const uint8_t*)mh) ) {
- ImageLoader* image = new ImageLoaderMachO(mh, slide, path, gLinkContext);
+ if ( isCompatibleMachO((const uint8_t*)mh, path) ) {
+ ImageLoader* image = ImageLoaderMachO::instantiateMainExecutable(mh, slide, path, gLinkContext);
addImage(image);
- return image;
+ return (ImageLoaderMachO*)image;
}
throw "main executable not a known format";
}
#if DYLD_SHARED_CACHE_SUPPORT
-static ImageLoader* findSharedCacheImage(const struct stat& stat_buf, const char* path)
+
+#if __IPHONE_OS_VERSION_MIN_REQUIRED
+static bool dylibsCanOverrideCache()
+{
+ uint32_t devFlags = *((uint32_t*)_COMM_PAGE_DEV_FIRM);
+ if ( (devFlags & 1) == 0 )
+ return false;
+ return ( (sSharedCache != NULL) && (sSharedCache->cacheType == kDyldSharedCacheTypeDevelopment) );
+}
+#endif
+
+static bool findInSharedCacheImage(const char* path, bool searchByPath, const struct stat* stat_buf, const macho_header** mh, const char** pathInCache, long* slide)
{
if ( sSharedCache != NULL ) {
+#if __MAC_OS_X_VERSION_MIN_REQUIRED
+ // Mac OS X always requires inode/mtime to valid cache
+ // if stat() not done yet, do it now
+ struct stat statb;
+ if ( stat_buf == NULL ) {
+ if ( my_stat(path, &statb) == -1 )
+ return false;
+ stat_buf = &statb;
+ }
+#endif
+#if __IPHONE_OS_VERSION_MIN_REQUIRED
+ uint64_t hash = 0;
+ for (const char* s=path; *s != '\0'; ++s)
+ hash += hash*4 + *s;
+#endif
+
// walk shared cache to see if there is a cached image that matches the inode/mtime/path desired
const dyld_cache_image_info* const start = (dyld_cache_image_info*)((uint8_t*)sSharedCache + sSharedCache->imagesOffset);
const dyld_cache_image_info* const end = &start[sSharedCache->imagesCount];
+#if __IPHONE_OS_VERSION_MIN_REQUIRED
+ const bool cacheHasHashInfo = (start->modTime == 0);
+#endif
for( const dyld_cache_image_info* p = start; p != end; ++p) {
+#if __IPHONE_OS_VERSION_MIN_REQUIRED
+ // just check path
+ const char* aPath = (char*)sSharedCache + p->pathFileOffset;
+ if ( cacheHasHashInfo && (p->inode != hash) )
+ continue;
+ if ( strcmp(path, aPath) == 0 ) {
+ // found image in cache
+ *mh = (macho_header*)(p->address+sSharedCacheSlide);
+ *pathInCache = aPath;
+ *slide = sSharedCacheSlide;
+ if ( aPath < (char*)(*mh) ) {
+ // <rdar://problem/22056997> found alias, rescan list to get canonical name
+ for (const dyld_cache_image_info* p2 = start; p2 != end; ++p2) {
+ if ( p2->address == p->address ) {
+ *pathInCache = (char*)sSharedCache + p2->pathFileOffset;
+ break;
+ }
+ }
+ }
+ return true;
+ }
+#elif __MAC_OS_X_VERSION_MIN_REQUIRED
// check mtime and inode first because it is fast
- if ( ((time_t)p->modTime == stat_buf.st_mtime) && ((ino_t)p->inode == stat_buf.st_ino) ) {
+ bool inodeMatch = ( ((time_t)p->modTime == stat_buf->st_mtime) && ((ino_t)p->inode == stat_buf->st_ino) );
+ if ( searchByPath || sSharedCacheIgnoreInodeAndTimeStamp || inodeMatch ) {
// mod-time and inode match an image in the shared cache, now check path
- const char* pathInCache = (char*)sSharedCache + p->pathFileOffset;
- bool cacheHit = (strcmp(path, pathInCache) == 0);
- if ( ! cacheHit ) {
+ const char* aPath = (char*)sSharedCache + p->pathFileOffset;
+ bool cacheHit = (strcmp(path, aPath) == 0);
+ if ( inodeMatch && !cacheHit ) {
// path does not match install name of dylib in cache, but inode and mtime does match
// perhaps path is a symlink to the cached dylib
struct stat pathInCacheStatBuf;
- if ( stat(pathInCache, &pathInCacheStatBuf) != -1 )
- cacheHit = ( (pathInCacheStatBuf.st_dev == stat_buf.st_dev) && (pathInCacheStatBuf.st_ino == stat_buf.st_ino) );
+ if ( my_stat(aPath, &pathInCacheStatBuf) != -1 )
+ cacheHit = ( (pathInCacheStatBuf.st_dev == stat_buf->st_dev) && (pathInCacheStatBuf.st_ino == stat_buf->st_ino) );
}
if ( cacheHit ) {
- // found image in cache, instantiate an ImageLoader with it
- return new ImageLoaderMachO((struct mach_header*)(p->address), pathInCache, stat_buf, gLinkContext);
+ // found image in cache, return info
+ *mh = (macho_header*)(p->address+sSharedCacheSlide);
+ //dyld::log("findInSharedCacheImage(), mh=%p, p->address=0x%0llX, slid=0x%0lX, path=%s\n",
+ // *mh, p->address, sSharedCacheSlide, aPath);
+ *pathInCache = aPath;
+ *slide = sSharedCacheSlide;
+ return true;
}
}
+#endif
}
}
- return NULL;
-}
+ return false;
+}
+
+bool inSharedCache(const char* path)
+{
+ const macho_header* mhInCache;
+ const char* pathInCache;
+ long slide;
+ return findInSharedCacheImage(path, true, NULL, &mhInCache, &pathInCache, &slide);
+}
+
#endif
static ImageLoader* checkandAddImage(ImageLoader* image, const LoadContext& context)
@@ -1534,7 +2867,8 @@
if ( installPath != NULL) {
if ( strcmp(loadedImageInstallPath, installPath) == 0 ) {
//dyld::log("duplicate(%s) => %p\n", installPath, anImage);
- delete image;
+ removeImage(image);
+ ImageLoader::deleteImage(image);
return anImage;
}
}
@@ -1547,6 +2881,12 @@
if ( context.mustBeDylib && !image->isDylib() )
throw "not a dylib";
+ // regular main executables cannot be loaded
+ if ( image->isExecutable() ) {
+ if ( !context.canBePIE || !image->isPositionIndependentExecutable() )
+ throw "can't load a main executable";
+ }
+
// don't add bundles to global list, they can be loaded but not linked. When linked it will be added to list
if ( ! image->isBundle() )
addImage(image);
@@ -1554,8 +2894,44 @@
return image;
}
+#if TARGET_IPHONE_SIMULATOR
+static bool isSimulatorBinary(const uint8_t* firstPages, const char* path)
+{
+ const macho_header* mh = (macho_header*)firstPages;
+ const uint32_t cmd_count = mh->ncmds;
+ const load_command* const cmds = (struct load_command*)(((char*)mh)+sizeof(macho_header));
+ const load_command* const cmdsEnd = (load_command*)((char*)cmds + mh->sizeofcmds);
+ const struct load_command* cmd = cmds;
+ for (uint32_t i = 0; i < cmd_count; ++i) {
+ switch (cmd->cmd) {
+ #if TARGET_OS_WATCH
+ case LC_VERSION_MIN_WATCHOS:
+ return true;
+ #elif TARGET_OS_TV
+ case LC_VERSION_MIN_TVOS:
+ return true;
+ #elif TARGET_OS_IOS
+ case LC_VERSION_MIN_IPHONEOS:
+ return true;
+ #endif
+ case LC_VERSION_MIN_MACOSX:
+ // grandfather in a few libSystem dylibs
+ if ((strcmp(path, "/usr/lib/system/libsystem_kernel.dylib") == 0) ||
+ (strcmp(path, "/usr/lib/system/libsystem_platform.dylib") == 0) ||
+ (strcmp(path, "/usr/lib/system/libsystem_pthread.dylib") == 0))
+ return true;
+ return false;
+ }
+ cmd = (const struct load_command*)(((char*)cmd)+cmd->cmdsize);
+ if ( cmd > cmdsEnd )
+ return false;
+ }
+ return false;
+}
+#endif
+
// map in file and instantiate an ImageLoader
-static ImageLoader* loadPhase6(int fd, struct stat& stat_buf, const char* path, const LoadContext& context)
+static ImageLoader* loadPhase6(int fd, const struct stat& stat_buf, const char* path, const LoadContext& context)
{
//dyld::log("%s(%s)\n", __func__ , path);
uint64_t fileOffset = 0;
@@ -1565,23 +2941,31 @@
if ( (stat_buf.st_mode & S_IFMT) != S_IFREG )
throw "not a file";
- uint8_t firstPage[4096];
+ uint8_t firstPages[MAX_MACH_O_HEADER_AND_LOAD_COMMANDS_SIZE];
bool shortPage = false;
// min mach-o file is 4K
if ( fileLength < 4096 ) {
- pread(fd, firstPage, fileLength, 0);
+ if ( pread(fd, firstPages, fileLength, 0) != (ssize_t)fileLength )
+ throwf("pread of short file failed: %d", errno);
shortPage = true;
}
else {
- pread(fd, firstPage, 4096,0);
+ // optimistically read only first 4KB
+ if ( pread(fd, firstPages, 4096, 0) != 4096 )
+ throwf("pread of first 4K failed: %d", errno);
}
// if fat wrapper, find usable sub-file
- const fat_header* fileStartAsFat = (fat_header*)firstPage;
+ const fat_header* fileStartAsFat = (fat_header*)firstPages;
if ( fileStartAsFat->magic == OSSwapBigToHostInt32(FAT_MAGIC) ) {
+ if ( OSSwapBigToHostInt32(fileStartAsFat->nfat_arch) > ((4096 - sizeof(fat_header)) / sizeof(fat_arch)) )
+ throwf("fat header too large: %u entries", OSSwapBigToHostInt32(fileStartAsFat->nfat_arch));
if ( fatFindBest(fileStartAsFat, &fileOffset, &fileLength) ) {
- pread(fd, firstPage, 4096, fileOffset);
+ if ( (fileOffset+fileLength) > (uint64_t)(stat_buf.st_size) )
+ throwf("truncated fat file. file length=%llu, but needed slice goes to %llu", stat_buf.st_size, fileOffset+fileLength);
+ if (pread(fd, firstPages, 4096, fileOffset) != 4096)
+ throwf("pread of fat file failed: %d", errno);
}
else {
throw "no matching architecture in universal wrapper";
@@ -1589,12 +2973,50 @@
}
// try mach-o loader
- if ( isCompatibleMachO(firstPage) ) {
- if ( shortPage )
- throw "file too short";
+ if ( shortPage )
+ throw "file too short";
+ if ( isCompatibleMachO(firstPages, path) ) {
+
+ // only MH_BUNDLE, MH_DYLIB, and some MH_EXECUTE can be dynamically loaded
+ const mach_header* mh = (mach_header*)firstPages;
+ switch ( mh->filetype ) {
+ case MH_EXECUTE:
+ case MH_DYLIB:
+ case MH_BUNDLE:
+ break;
+ default:
+ throw "mach-o, but wrong filetype";
+ }
+
+ uint32_t headerAndLoadCommandsSize = sizeof(macho_header) + mh->sizeofcmds;
+ if ( headerAndLoadCommandsSize > MAX_MACH_O_HEADER_AND_LOAD_COMMANDS_SIZE )
+ throwf("malformed mach-o: load commands size (%u) > %u", headerAndLoadCommandsSize, MAX_MACH_O_HEADER_AND_LOAD_COMMANDS_SIZE);
+
+ if ( headerAndLoadCommandsSize > fileLength )
+ dyld::throwf("malformed mach-o: load commands size (%u) > mach-o file size (%llu)", headerAndLoadCommandsSize, fileLength);
+
+ if ( headerAndLoadCommandsSize > 4096 ) {
+ // read more pages
+ unsigned readAmount = headerAndLoadCommandsSize - 4096;
+ if ( pread(fd, &firstPages[4096], readAmount, fileOffset+4096) != readAmount )
+ throwf("pread of extra load commands past 4KB failed: %d", errno);
+ }
+
+#if TARGET_IPHONE_SIMULATOR
+ // <rdar://problem/14168872> dyld_sim should restrict loading osx binaries
+ if ( !isSimulatorBinary(firstPages, path) ) {
+ #if TARGET_OS_WATCH
+ throw "mach-o, but not built for watchOS simulator";
+ #elif TARGET_OS_TV
+ throw "mach-o, but not built for tvOS simulator";
+ #else
+ throw "mach-o, but not built for iOS simulator";
+ #endif
+ }
+#endif
// instantiate an image
- ImageLoader* image = new ImageLoaderMachO(path, fd, firstPage, fileOffset, fileLength, stat_buf, gLinkContext);
+ ImageLoader* image = ImageLoaderMachO::instantiateFromFile(path, fd, firstPages, headerAndLoadCommandsSize, fileOffset, fileLength, stat_buf, gLinkContext);
// validate
return checkandAddImage(image, context);
@@ -1604,7 +3026,7 @@
// throw error about what was found
- switch (*(uint32_t*)firstPage) {
+ switch (*(uint32_t*)firstPages) {
case MH_MAGIC:
case MH_CIGAM:
case MH_MAGIC_64:
@@ -1612,50 +3034,31 @@
throw "mach-o, but wrong architecture";
default:
throwf("unknown file type, first eight bytes: 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X",
- firstPage[0], firstPage[1], firstPage[2], firstPage[3], firstPage[4], firstPage[5], firstPage[6],firstPage[7]);
- }
-}
-
-
-// try to open file
-static ImageLoader* loadPhase5open(const char* path, const LoadContext& context, std::vector<const char*>* exceptions)
+ firstPages[0], firstPages[1], firstPages[2], firstPages[3], firstPages[4], firstPages[5], firstPages[6],firstPages[7]);
+ }
+}
+
+
+static ImageLoader* loadPhase5open(const char* path, const LoadContext& context, const struct stat& stat_buf, std::vector<const char*>* exceptions)
{
//dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
- ImageLoader* image = NULL;
-
- // just return NULL if file not found, but record any other errors
- struct stat stat_buf;
- if ( stat(path, &stat_buf) == -1 ) {
- int err = errno;
- if ( err != ENOENT ) {
- exceptions->push_back(dyld::mkstringf("%s: stat() failed with errno=%d", path, err));
- }
- return NULL;
- }
-
- // in case image was renamed or found via symlinks, check for inode match
- image = findLoadedImage(stat_buf);
- if ( image != NULL )
- return image;
-
- // do nothing if not already loaded and if RTLD_NOLOAD or NSADDIMAGE_OPTION_RETURN_ONLY_IF_LOADED
- if ( context.dontLoad )
- return NULL;
-
-#if DYLD_SHARED_CACHE_SUPPORT
- // see if this image is in shared cache
- image = findSharedCacheImage(stat_buf, path);
- if ( image != NULL ) {
- return checkandAddImage(image, context);
- }
-#endif
-
+
// open file (automagically closed when this function exits)
FileOpener file(path);
- // just return NULL if file not found
- if ( file.getFileDescriptor() == -1 )
- return NULL;
+ // just return NULL if file not found, but record any other errors
+ if ( file.getFileDescriptor() == -1 ) {
+ int err = errno;
+ if ( err != ENOENT ) {
+ const char* newMsg;
+ if ( (err == EPERM) && sandboxBlockedOpen(path) )
+ newMsg = dyld::mkstringf("file system sandbox blocked open() of '%s'", path);
+ else
+ newMsg = dyld::mkstringf("%s: open() failed with errno=%d", path, err);
+ exceptions->push_back(newMsg);
+ }
+ return NULL;
+ }
try {
return loadPhase6(file.getFileDescriptor(), stat_buf, path, context);
@@ -1668,21 +3071,174 @@
}
}
+
+#if __MAC_OS_X_VERSION_MIN_REQUIRED
+static ImageLoader* loadPhase5load(const char* path, const char* orgPath, const LoadContext& context, unsigned& cacheIndex, std::vector<const char*>* exceptions)
+{
+ //dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
+ ImageLoader* image = NULL;
+
+ #if SUPPORT_ACCELERATE_TABLES
+ if ( sAllCacheImagesProxy != NULL ) {
+ unsigned index;
+ if ( sAllCacheImagesProxy->hasDylib(path, &index) )
+ return sAllCacheImagesProxy;
+ }
+ #endif
+
+ // just return NULL if file not found, but record any other errors
+ struct stat stat_buf;
+ if ( my_stat(path, &stat_buf) == -1 ) {
+ int err = errno;
+ if ( err != ENOENT ) {
+ if ( (err == EPERM) && sandboxBlockedStat(path) )
+ exceptions->push_back(dyld::mkstringf("%s: file system sandbox blocked stat()", path));
+ else
+ exceptions->push_back(dyld::mkstringf("%s: stat() failed with errno=%d", path, err));
+ }
+ return NULL;
+ }
+
+ // in case image was renamed or found via symlinks, check for inode match
+ image = findLoadedImage(stat_buf);
+ if ( image != NULL )
+ return image;
+
+ // do nothing if not already loaded and if RTLD_NOLOAD or NSADDIMAGE_OPTION_RETURN_ONLY_IF_LOADED
+ if ( context.dontLoad )
+ return NULL;
+
+#if DYLD_SHARED_CACHE_SUPPORT
+ // see if this image is in shared cache
+ const macho_header* mhInCache;
+ const char* pathInCache;
+ long slideInCache;
+ if ( findInSharedCacheImage(path, false, &stat_buf, &mhInCache, &pathInCache, &slideInCache) ) {
+ image = ImageLoaderMachO::instantiateFromCache(mhInCache, pathInCache, slideInCache, stat_buf, gLinkContext);
+ return checkandAddImage(image, context);
+ }
+#endif
+ // file exists and is not in dyld shared cache, so open it
+ return loadPhase5open(path, context, stat_buf, exceptions);
+}
+#endif // __MAC_OS_X_VERSION_MIN_REQUIRED
+
+
+
+#if __IPHONE_OS_VERSION_MIN_REQUIRED
+static ImageLoader* loadPhase5stat(const char* path, const LoadContext& context, struct stat* stat_buf,
+ int* statErrNo, bool* imageFound, std::vector<const char*>* exceptions)
+{
+ ImageLoader* image = NULL;
+ *imageFound = false;
+ *statErrNo = 0;
+ if ( my_stat(path, stat_buf) == 0 ) {
+ // in case image was renamed or found via symlinks, check for inode match
+ image = findLoadedImage(*stat_buf);
+ if ( image != NULL ) {
+ *imageFound = true;
+ return image;
+ }
+ // do nothing if not already loaded and if RTLD_NOLOAD
+ if ( context.dontLoad ) {
+ *imageFound = true;
+ return NULL;
+ }
+ image = loadPhase5open(path, context, *stat_buf, exceptions);
+ if ( image != NULL ) {
+ *imageFound = true;
+ return image;
+ }
+ }
+ else {
+ *statErrNo = errno;
+ }
+ return NULL;
+}
+
+// try to open file
+static ImageLoader* loadPhase5load(const char* path, const char* orgPath, const LoadContext& context, unsigned& cacheIndex, std::vector<const char*>* exceptions)
+{
+ //dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
+ struct stat stat_buf;
+ bool imageFound;
+ int statErrNo;
+ ImageLoader* image;
+#if DYLD_SHARED_CACHE_SUPPORT
+ #if SUPPORT_ACCELERATE_TABLES
+ if ( sAllCacheImagesProxy != NULL ) {
+ if ( sAllCacheImagesProxy->hasDylib(path, &cacheIndex) )
+ return sAllCacheImagesProxy;
+ }
+ #endif
+ if ( dylibsCanOverrideCache() ) {
+ // flag is set that allows installed framework roots to override dyld shared cache
+ image = loadPhase5stat(path, context, &stat_buf, &statErrNo, &imageFound, exceptions);
+ if ( imageFound )
+ return image;
+ }
+ // see if this image is in shared cache
+ const macho_header* mhInCache;
+ const char* pathInCache;
+ long slideInCache;
+ if ( findInSharedCacheImage(path, true, NULL, &mhInCache, &pathInCache, &slideInCache) ) {
+ // see if this image in the cache was already loaded via a different path
+ for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); ++it) {
+ ImageLoader* anImage = *it;
+ if ( (const macho_header*)anImage->machHeader() == mhInCache )
+ return anImage;
+ }
+ // do nothing if not already loaded and if RTLD_NOLOAD
+ if ( context.dontLoad )
+ return NULL;
+ // nope, so instantiate a new image from dyld shared cache
+ // <rdar://problem/7014995> zero out stat buffer so mtime, etc are zero for items from the shared cache
+ bzero(&stat_buf, sizeof(stat_buf));
+ image = ImageLoaderMachO::instantiateFromCache(mhInCache, pathInCache, slideInCache, stat_buf, gLinkContext);
+ return checkandAddImage(image, context);
+ }
+
+ if ( !dylibsCanOverrideCache() ) {
+ // flag is not set, and not in cache to try opening it
+ image = loadPhase5stat(path, context, &stat_buf, &statErrNo, &imageFound, exceptions);
+ if ( imageFound )
+ return image;
+ }
+#else
+ image = loadPhase5stat(path, context, &stat_buf, &statErrNo, &imageFound, exceptions);
+ if ( imageFound )
+ return image;
+#endif
+ // just return NULL if file not found, but record any other errors
+ if ( (statErrNo != ENOENT) && (statErrNo != 0) ) {
+ if ( (statErrNo == EPERM) && sandboxBlockedStat(path) )
+ exceptions->push_back(dyld::mkstringf("%s: file system sandbox blocked stat()", path));
+ else
+ exceptions->push_back(dyld::mkstringf("%s: stat() failed with errno=%d", path, statErrNo));
+ }
+ return NULL;
+}
+#endif // __IPHONE_OS_VERSION_MIN_REQUIRED
+
+
// look for path match with existing loaded images
-static ImageLoader* loadPhase5check(const char* path, const LoadContext& context)
-{
- //dyld::log("%s(%s)\n", __func__ , path);
+static ImageLoader* loadPhase5check(const char* path, const char* orgPath, const LoadContext& context)
+{
+ //dyld::log("%s(%s, %s)\n", __func__ , path, orgPath);
// search path against load-path and install-path of all already loaded images
uint32_t hash = ImageLoader::hash(path);
+ //dyld::log("check() hash=%d, path=%s\n", hash, path);
for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
ImageLoader* anImage = *it;
- // check has first to cut down on strcmp calls
- if ( anImage->getPathHash() == hash )
+ // check hash first to cut down on strcmp calls
+ //dyld::log(" check() hash=%d, path=%s\n", anImage->getPathHash(), anImage->getPath());
+ if ( anImage->getPathHash() == hash ) {
if ( strcmp(path, anImage->getPath()) == 0 ) {
// if we are looking for a dylib don't return something else
if ( !context.mustBeDylib || anImage->isDylib() )
return anImage;
}
+ }
if ( context.matchByInstallName || anImage->matchInstallPath() ) {
const char* installPath = anImage->getInstallPath();
if ( installPath != NULL) {
@@ -1693,6 +3249,16 @@
}
}
}
+ // an install name starting with @rpath should match by install name, not just real path
+ if ( (orgPath[0] == '@') && (strncmp(orgPath, "@rpath/", 7) == 0) ) {
+ const char* installPath = anImage->getInstallPath();
+ if ( installPath != NULL) {
+ if ( !context.mustBeDylib || anImage->isDylib() ) {
+ if ( strcmp(orgPath, installPath) == 0 )
+ return anImage;
+ }
+ }
+ }
}
//dyld::log("%s(%s) => NULL\n", __func__, path);
@@ -1701,45 +3267,55 @@
// open or check existing
-static ImageLoader* loadPhase5(const char* path, const LoadContext& context, std::vector<const char*>* exceptions)
+static ImageLoader* loadPhase5(const char* path, const char* orgPath, const LoadContext& context, unsigned& cacheIndex, std::vector<const char*>* exceptions)
{
//dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
+
+ // check for specific dylib overrides
+ for (std::vector<DylibOverride>::iterator it = sDylibOverrides.begin(); it != sDylibOverrides.end(); ++it) {
+ if ( strcmp(it->installName, path) == 0 ) {
+ path = it->override;
+ break;
+ }
+ }
+
if ( exceptions != NULL )
- return loadPhase5open(path, context, exceptions);
+ return loadPhase5load(path, orgPath, context, cacheIndex, exceptions);
else
- return loadPhase5check(path, context);
+ return loadPhase5check(path, orgPath, context);
}
// try with and without image suffix
-static ImageLoader* loadPhase4(const char* path, const LoadContext& context, std::vector<const char*>* exceptions)
+static ImageLoader* loadPhase4(const char* path, const char* orgPath, const LoadContext& context, unsigned& cacheIndex, std::vector<const char*>* exceptions)
{
//dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
ImageLoader* image = NULL;
if ( gLinkContext.imageSuffix != NULL ) {
char pathWithSuffix[strlen(path)+strlen( gLinkContext.imageSuffix)+2];
ImageLoader::addSuffix(path, gLinkContext.imageSuffix, pathWithSuffix);
- image = loadPhase5(pathWithSuffix, context, exceptions);
+ image = loadPhase5(pathWithSuffix, orgPath, context, cacheIndex, exceptions);
}
if ( image == NULL )
- image = loadPhase5(path, context, exceptions);
+ image = loadPhase5(path, orgPath, context, cacheIndex, exceptions);
return image;
}
-static ImageLoader* loadPhase2(const char* path, const LoadContext& context,
- const char* const frameworkPaths[], const char* const libraryPaths[],
- std::vector<const char*>* exceptions); // forward reference
+static ImageLoader* loadPhase2(const char* path, const char* orgPath, const LoadContext& context,
+ const char* const frameworkPaths[], const char* const libraryPaths[],
+ unsigned& cacheIndex, std::vector<const char*>* exceptions); // forward reference
// expand @ variables
-static ImageLoader* loadPhase3(const char* path, const LoadContext& context, std::vector<const char*>* exceptions)
+static ImageLoader* loadPhase3(const char* path, const char* orgPath, const LoadContext& context, unsigned& cacheIndex, std::vector<const char*>* exceptions)
{
//dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
ImageLoader* image = NULL;
if ( strncmp(path, "@executable_path/", 17) == 0 ) {
+#if __MAC_OS_X_VERSION_MIN_REQUIRED
// executable_path cannot be in used in any binary in a setuid process rdar://problem/4589305
- if ( sMainExecutableIsSetuid ) {
- throwf("unsafe use of @executable_path in %s with setuid binary", context.origin);
- }
+ if ( gLinkContext.processIsRestricted )
+ throwf("unsafe use of @executable_path in %s with restricted binary", context.origin);
+#endif
// handle @executable_path path prefix
const char* executablePath = sExecPath;
char newPath[strlen(executablePath) + strlen(path)];
@@ -1749,7 +3325,7 @@
strcpy(&addPoint[1], &path[17]);
else
strcpy(newPath, &path[17]);
- image = loadPhase4(newPath, context, exceptions);
+ image = loadPhase4(newPath, orgPath, context, cacheIndex, exceptions);
if ( image != NULL )
return image;
@@ -1758,21 +3334,22 @@
if ( realpath(sExecPath, resolvedPath) != NULL ) {
char newRealPath[strlen(resolvedPath) + strlen(path)];
strcpy(newRealPath, resolvedPath);
- char* addPoint = strrchr(newRealPath,'/');
+ addPoint = strrchr(newRealPath,'/');
if ( addPoint != NULL )
strcpy(&addPoint[1], &path[17]);
else
strcpy(newRealPath, &path[17]);
- image = loadPhase4(newRealPath, context, exceptions);
+ image = loadPhase4(newRealPath, orgPath, context, cacheIndex, exceptions);
if ( image != NULL )
return image;
}
}
else if ( (strncmp(path, "@loader_path/", 13) == 0) && (context.origin != NULL) ) {
+#if __MAC_OS_X_VERSION_MIN_REQUIRED
// @loader_path cannot be used from the main executable of a setuid process rdar://problem/4589305
- if ( sMainExecutableIsSetuid && (strcmp(context.origin, sExecPath) == 0) )
- throwf("unsafe use of @loader_path in %s with setuid binary", context.origin);
-
+ if ( gLinkContext.processIsRestricted && (strcmp(context.origin, sExecPath) == 0) )
+ throwf("unsafe use of @loader_path in %s with restricted binary", context.origin);
+#endif
// handle @loader_path path prefix
char newPath[strlen(context.origin) + strlen(path)];
strcpy(newPath, context.origin);
@@ -1781,7 +3358,7 @@
strcpy(&addPoint[1], &path[13]);
else
strcpy(newPath, &path[13]);
- image = loadPhase4(newPath, context, exceptions);
+ image = loadPhase4(newPath, orgPath, context, cacheIndex, exceptions);
if ( image != NULL )
return image;
@@ -1790,12 +3367,12 @@
if ( realpath(context.origin, resolvedPath) != NULL ) {
char newRealPath[strlen(resolvedPath) + strlen(path)];
strcpy(newRealPath, resolvedPath);
- char* addPoint = strrchr(newRealPath,'/');
+ addPoint = strrchr(newRealPath,'/');
if ( addPoint != NULL )
strcpy(&addPoint[1], &path[13]);
else
strcpy(newRealPath, &path[13]);
- image = loadPhase4(newRealPath, context, exceptions);
+ image = loadPhase4(newRealPath, orgPath, context, cacheIndex, exceptions);
if ( image != NULL )
return image;
}
@@ -1809,9 +3386,16 @@
const char* anRPath = *it;
char newPath[strlen(anRPath) + strlen(trailingPath)+2];
strcpy(newPath, anRPath);
- strcat(newPath, "/");
+ if ( newPath[strlen(newPath)-1] != '/' )
+ strcat(newPath, "/");
strcat(newPath, trailingPath);
- image = loadPhase4(newPath, context, exceptions);
+ image = loadPhase4(newPath, orgPath, context, cacheIndex, exceptions);
+ if ( gLinkContext.verboseRPaths && (exceptions != NULL) ) {
+ if ( image != NULL )
+ dyld::log("RPATH successful expansion of %s to: %s\n", orgPath, newPath);
+ else
+ dyld::log("RPATH failed to expanding %s to: %s\n", orgPath, newPath);
+ }
if ( image != NULL )
return image;
}
@@ -1820,7 +3404,7 @@
// substitute @rpath with LD_LIBRARY_PATH
if ( sEnv.LD_LIBRARY_PATH != NULL ) {
- image = loadPhase2(trailingPath, context, NULL, sEnv.LD_LIBRARY_PATH, exceptions);
+ image = loadPhase2(trailingPath, orgPath, context, NULL, sEnv.LD_LIBRARY_PATH, cacheIndex, exceptions);
if ( image != NULL )
return image;
}
@@ -1829,47 +3413,51 @@
if ( (exceptions != NULL) && (trailingPath != path) )
return NULL;
}
- else if ( sMainExecutableIsSetuid && (path[0] != '/') ) {
- throwf("unsafe use of relative rpath %s in %s with setuid binary", path, context.origin);
- }
-
- return loadPhase4(path, context, exceptions);
+#if __MAC_OS_X_VERSION_MIN_REQUIRED
+ else if ( gLinkContext.processIsRestricted && (path[0] != '/' ) ) {
+ throwf("unsafe use of relative rpath %s in %s with restricted binary", path, context.origin);
+ }
+#endif
+
+ return loadPhase4(path, orgPath, context, cacheIndex, exceptions);
}
// try search paths
-static ImageLoader* loadPhase2(const char* path, const LoadContext& context,
+static ImageLoader* loadPhase2(const char* path, const char* orgPath, const LoadContext& context,
const char* const frameworkPaths[], const char* const libraryPaths[],
- std::vector<const char*>* exceptions)
+ unsigned& cacheIndex, std::vector<const char*>* exceptions)
{
//dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
ImageLoader* image = NULL;
const char* frameworkPartialPath = getFrameworkPartialPath(path);
if ( frameworkPaths != NULL ) {
if ( frameworkPartialPath != NULL ) {
- const int frameworkPartialPathLen = strlen(frameworkPartialPath);
+ const size_t frameworkPartialPathLen = strlen(frameworkPartialPath);
for(const char* const* fp = frameworkPaths; *fp != NULL; ++fp) {
char npath[strlen(*fp)+frameworkPartialPathLen+8];
strcpy(npath, *fp);
strcat(npath, "/");
strcat(npath, frameworkPartialPath);
//dyld::log("dyld: fallback framework path used: %s() -> loadPhase4(\"%s\", ...)\n", __func__, npath);
- image = loadPhase4(npath, context, exceptions);
+ image = loadPhase4(npath, orgPath, context, cacheIndex, exceptions);
if ( image != NULL )
return image;
}
}
}
- if ( libraryPaths != NULL ) {
+ // <rdar://problem/12649639> An executable with the same name as a framework & DYLD_LIBRARY_PATH pointing to it gets loaded twice
+ // <rdar://problem/14160846> Some apps depend on frameworks being found via library paths
+ if ( (libraryPaths != NULL) && ((frameworkPartialPath == NULL) || sFrameworksFoundAsDylibs) ) {
const char* libraryLeafName = getLibraryLeafName(path);
- const int libraryLeafNameLen = strlen(libraryLeafName);
+ const size_t libraryLeafNameLen = strlen(libraryLeafName);
for(const char* const* lp = libraryPaths; *lp != NULL; ++lp) {
char libpath[strlen(*lp)+libraryLeafNameLen+8];
strcpy(libpath, *lp);
strcat(libpath, "/");
strcat(libpath, libraryLeafName);
//dyld::log("dyld: fallback library path used: %s() -> loadPhase4(\"%s\", ...)\n", __func__, libpath);
- image = loadPhase4(libpath, context, exceptions);
+ image = loadPhase4(libpath, orgPath, context, cacheIndex, exceptions);
if ( image != NULL )
return image;
}
@@ -1878,33 +3466,36 @@
}
// try search overrides and fallbacks
-static ImageLoader* loadPhase1(const char* path, const LoadContext& context, std::vector<const char*>* exceptions)
+static ImageLoader* loadPhase1(const char* path, const char* orgPath, const LoadContext& context, unsigned& cacheIndex, std::vector<const char*>* exceptions)
{
//dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
ImageLoader* image = NULL;
// handle LD_LIBRARY_PATH environment variables that force searching
if ( context.useLdLibraryPath && (sEnv.LD_LIBRARY_PATH != NULL) ) {
- image = loadPhase2(path, context, NULL, sEnv.LD_LIBRARY_PATH, exceptions);
+ image = loadPhase2(path, orgPath, context, NULL, sEnv.LD_LIBRARY_PATH, cacheIndex,exceptions);
if ( image != NULL )
return image;
}
// handle DYLD_ environment variables that force searching
if ( context.useSearchPaths && ((sEnv.DYLD_FRAMEWORK_PATH != NULL) || (sEnv.DYLD_LIBRARY_PATH != NULL)) ) {
- image = loadPhase2(path, context, sEnv.DYLD_FRAMEWORK_PATH, sEnv.DYLD_LIBRARY_PATH, exceptions);
+ image = loadPhase2(path, orgPath, context, sEnv.DYLD_FRAMEWORK_PATH, sEnv.DYLD_LIBRARY_PATH, cacheIndex, exceptions);
if ( image != NULL )
return image;
}
// try raw path
- image = loadPhase3(path, context, exceptions);
+ image = loadPhase3(path, orgPath, context, cacheIndex, exceptions);
if ( image != NULL )
return image;
// try fallback paths during second time (will open file)
- if ( !context.dontLoad && (exceptions != NULL) && ((sEnv.DYLD_FALLBACK_FRAMEWORK_PATH != NULL) || (sEnv.DYLD_FALLBACK_LIBRARY_PATH != NULL)) ) {
- image = loadPhase2(path, context, sEnv.DYLD_FALLBACK_FRAMEWORK_PATH, sEnv.DYLD_FALLBACK_LIBRARY_PATH, exceptions);
+ const char* const* fallbackLibraryPaths = sEnv.DYLD_FALLBACK_LIBRARY_PATH;
+ if ( (fallbackLibraryPaths != NULL) && !context.useFallbackPaths )
+ fallbackLibraryPaths = NULL;
+ if ( !context.dontLoad && (exceptions != NULL) && ((sEnv.DYLD_FALLBACK_FRAMEWORK_PATH != NULL) || (fallbackLibraryPaths != NULL)) ) {
+ image = loadPhase2(path, orgPath, context, sEnv.DYLD_FALLBACK_FRAMEWORK_PATH, fallbackLibraryPaths, cacheIndex, exceptions);
if ( image != NULL )
return image;
}
@@ -1913,25 +3504,37 @@
}
// try root substitutions
-static ImageLoader* loadPhase0(const char* path, const LoadContext& context, std::vector<const char*>* exceptions)
+static ImageLoader* loadPhase0(const char* path, const char* orgPath, const LoadContext& context, unsigned& cacheIndex, std::vector<const char*>* exceptions)
{
//dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
+#if SUPPORT_ROOT_PATH
// handle DYLD_ROOT_PATH which forces absolute paths to use a new root
- if ( (sEnv.DYLD_ROOT_PATH != NULL) && (path[0] == '/') ) {
- for(const char* const* rootPath = sEnv.DYLD_ROOT_PATH ; *rootPath != NULL; ++rootPath) {
+ if ( (gLinkContext.rootPaths != NULL) && (path[0] == '/') ) {
+ for(const char* const* rootPath = gLinkContext.rootPaths ; *rootPath != NULL; ++rootPath) {
char newPath[strlen(*rootPath) + strlen(path)+2];
strcpy(newPath, *rootPath);
strcat(newPath, path);
- ImageLoader* image = loadPhase1(newPath, context, exceptions);
+ ImageLoader* image = loadPhase1(newPath, orgPath, context, cacheIndex, exceptions);
if ( image != NULL )
return image;
}
}
+#endif
// try raw path
- return loadPhase1(path, context, exceptions);
-}
+ return loadPhase1(path, orgPath, context, cacheIndex, exceptions);
+}
+
+#if DYLD_SHARED_CACHE_SUPPORT
+ static bool cacheablePath(const char* path) {
+ if (strncmp(path, "/usr/lib/", 9) == 0)
+ return true;
+ if (strncmp(path, "/System/Library/", 16) == 0)
+ return true;
+ return false;
+ }
+#endif
//
// Given all the DYLD_ environment variables, the general case for loading libraries
@@ -1947,8 +3550,12 @@
// the path. Either time, if an image is found, the phases all unwind without checking
// for other paths.
//
-ImageLoader* load(const char* path, const LoadContext& context)
-{
+ImageLoader* load(const char* path, const LoadContext& context, unsigned& cacheIndex)
+{
+ CRSetCrashLogMessage2(path);
+ const char* orgPath = path;
+ cacheIndex = UINT32_MAX;
+
//dyld::log("%s(%s)\n", __func__ , path);
char realPath[PATH_MAX];
// when DYLD_IMAGE_SUFFIX is in used, do a realpath(), otherwise a load of "Foo.framework/Foo" will not match
@@ -1958,26 +3565,74 @@
}
// try all path permutations and check against existing loaded images
- ImageLoader* image = loadPhase0(path, context, NULL);
- if ( image != NULL )
+
+ ImageLoader* image = loadPhase0(path, orgPath, context, cacheIndex, NULL);
+ if ( image != NULL ) {
+ CRSetCrashLogMessage2(NULL);
return image;
-
- // try all path permutations and try open() until first sucesss
+ }
+
+ // try all path permutations and try open() until first success
std::vector<const char*> exceptions;
- image = loadPhase0(path, context, &exceptions);
- if ( image != NULL )
+ image = loadPhase0(path, orgPath, context, cacheIndex, &exceptions);
+#if __IPHONE_OS_VERSION_MIN_REQUIRED && DYLD_SHARED_CACHE_SUPPORT && !TARGET_IPHONE_SIMULATOR
+ // <rdar://problem/16704628> support symlinks on disk to a path in dyld shared cache
+ if ( (image == NULL) && cacheablePath(path) && !context.dontLoad ) {
+ char resolvedPath[PATH_MAX];
+ realpath(path, resolvedPath);
+ int myerr = errno;
+ // If realpath() resolves to a path which does not exist on disk, errno is set to ENOENT
+ if ( (myerr == ENOENT) || (myerr == 0) )
+ {
+ // see if this image is in shared cache
+ const macho_header* mhInCache;
+ const char* pathInCache;
+ long slideInCache;
+ if ( findInSharedCacheImage(resolvedPath, false, NULL, &mhInCache, &pathInCache, &slideInCache) ) {
+ struct stat stat_buf;
+ bzero(&stat_buf, sizeof(stat_buf));
+ try {
+ image = ImageLoaderMachO::instantiateFromCache(mhInCache, pathInCache, slideInCache, stat_buf, gLinkContext);
+ image = checkandAddImage(image, context);
+ }
+ catch (...) {
+ image = NULL;
+ }
+ }
+ }
+ }
+#endif
+ CRSetCrashLogMessage2(NULL);
+ if ( image != NULL ) {
+ // <rdar://problem/6916014> leak in dyld during dlopen when using DYLD_ variables
+ for (std::vector<const char*>::iterator it = exceptions.begin(); it != exceptions.end(); ++it) {
+ free((void*)(*it));
+ }
+#if DYLD_SHARED_CACHE_SUPPORT
+ // if loaded image is not from cache, but original path is in cache
+ // set gSharedCacheOverridden flag to disable some ObjC optimizations
+ if ( !gSharedCacheOverridden && !image->inSharedCache() && image->isDylib() && cacheablePath(path) && inSharedCache(path) ) {
+ gSharedCacheOverridden = true;
+ }
+#endif
return image;
- else if ( exceptions.size() == 0 )
- throw "image not found";
+ }
+ else if ( exceptions.size() == 0 ) {
+ if ( context.dontLoad ) {
+ return NULL;
+ }
+ else
+ throw "image not found";
+ }
else {
const char* msgStart = "no suitable image found. Did find:";
const char* delim = "\n\t";
size_t allsizes = strlen(msgStart)+8;
- for (unsigned int i=0; i < exceptions.size(); ++i)
+ for (size_t i=0; i < exceptions.size(); ++i)
allsizes += (strlen(exceptions[i]) + strlen(delim));
char* fullMsg = new char[allsizes];
strcpy(fullMsg, msgStart);
- for (unsigned int i=0; i < exceptions.size(); ++i) {
+ for (size_t i=0; i < exceptions.size(); ++i) {
strcat(fullMsg, delim);
strcat(fullMsg, exceptions[i]);
free((void*)exceptions[i]);
@@ -1988,54 +3643,129 @@
-
#if DYLD_SHARED_CACHE_SUPPORT
-// hack until dyld no longer needs to run on Leopard kernels that don't have new shared region syscall
-static bool newSharedRegionSyscallAvailable()
-{
- int shreg_version;
- size_t buffer_size = sizeof(shreg_version);
- if ( sysctlbyname("vm.shared_region_version", &shreg_version, &buffer_size, NULL, 0) == 0 ) {
- if ( shreg_version == 3 )
- return true;
- }
- return false;
-}
+
+#if __i386__
+ #define ARCH_NAME "i386"
+ #define ARCH_CACHE_MAGIC "dyld_v1 i386"
+#elif __x86_64__
+ #define ARCH_NAME "x86_64"
+ #define ARCH_CACHE_MAGIC "dyld_v1 x86_64"
+ #define ARCH_NAME_H "x86_64h"
+ #define ARCH_CACHE_MAGIC_H "dyld_v1 x86_64h"
+#elif __ARM_ARCH_5TEJ__
+ #define ARCH_NAME "armv5"
+ #define ARCH_CACHE_MAGIC "dyld_v1 armv5"
+#elif __ARM_ARCH_6K__
+ #define ARCH_NAME "armv6"
+ #define ARCH_CACHE_MAGIC "dyld_v1 armv6"
+#elif __ARM_ARCH_7F__
+ #define ARCH_NAME "armv7f"
+ #define ARCH_CACHE_MAGIC "dyld_v1 armv7f"
+#elif __ARM_ARCH_7K__
+ #define ARCH_NAME "armv7k"
+ #define ARCH_CACHE_MAGIC "dyld_v1 armv7k"
+#elif __ARM_ARCH_7A__
+ #define ARCH_NAME "armv7"
+ #define ARCH_CACHE_MAGIC "dyld_v1 armv7"
+#elif __ARM_ARCH_7S__
+ #define ARCH_NAME "armv7s"
+ #define ARCH_CACHE_MAGIC "dyld_v1 armv7s"
+#elif __arm64__
+ #define ARCH_NAME "arm64"
+ #define ARCH_CACHE_MAGIC "dyld_v1 arm64"
+#endif
static int __attribute__((noinline)) _shared_region_check_np(uint64_t* start_address)
{
- if ( (gLinkContext.sharedRegionMode == ImageLoader::kUseSharedRegion) && newSharedRegionSyscallAvailable() )
+ if ( gLinkContext.sharedRegionMode == ImageLoader::kUseSharedRegion )
return syscall(294, start_address);
return -1;
}
-static int __attribute__((noinline)) _shared_region_map_np(int fd, uint32_t count, const shared_file_mapping_np mappings[])
-{
- int result;
- if ( (gLinkContext.sharedRegionMode == ImageLoader::kUseSharedRegion) && newSharedRegionSyscallAvailable() ) {
- return syscall(295, fd, count, mappings);
+static void rebaseChain(uint8_t* pageContent, uint16_t startOffset, uintptr_t slideAmount, const dyld_cache_slide_info2* slideInfo)
+{
+ const uintptr_t deltaMask = (uintptr_t)(slideInfo->delta_mask);
+ const uintptr_t valueMask = ~deltaMask;
+ const uintptr_t valueAdd = (uintptr_t)(slideInfo->value_add);
+ const unsigned deltaShift = __builtin_ctzll(deltaMask) - 2;
+
+ uint32_t pageOffset = startOffset;
+ uint32_t delta = 1;
+ while ( delta != 0 ) {
+ uint8_t* loc = pageContent + pageOffset;
+ uintptr_t rawValue = *((uintptr_t*)loc);
+ delta = (uint32_t)((rawValue & deltaMask) >> deltaShift);
+ uintptr_t value = (rawValue & valueMask);
+ if ( value != 0 ) {
+ value += valueAdd;
+ value += slideAmount;
+ }
+ *((uintptr_t*)loc) = value;
+ //dyld::log(" pageOffset=0x%03X, loc=%p, org value=0x%08llX, new value=0x%08llX, delta=0x%X\n", pageOffset, loc, (uint64_t)rawValue, (uint64_t)value, delta);
+ pageOffset += delta;
+ }
+}
+
+
+static void loadAndCheckCodeSignature(int fd, uint32_t count, const shared_file_mapping_np mappings[],
+ off_t codeSignatureOffset, size_t codeSignatureSize,
+ const void *firstPages, size_t firstPagesSize)
+{
+ // register code signature blob for whole dyld cache
+ fsignatures_t siginfo;
+ siginfo.fs_file_start = 0; // cache always starts at beginning of file
+ siginfo.fs_blob_start = (void*)codeSignatureOffset;
+ siginfo.fs_blob_size = codeSignatureSize;
+
+ int result = fcntl(fd, F_ADDFILESIGS_RETURN, &siginfo);
+ // <rdar://problem/12891874> don't warn in chrooted case because mapping syscall is about to fail too
+ if ( result == -1 ) {
+#if __IPHONE_OS_VERSION_MIN_REQUIRED
+ throwf("code signature registration for shared cache failed with errno=%d\n", errno);
+#else
+ if ( gLinkContext.verboseMapping )
+ dyld::log("dyld: code signature registration for shared cache failed with errno=%d\n", errno);
+#endif
+ }
+ uint64_t codeSignedLength = siginfo.fs_file_start;
+ for (uint32_t i = 0; i < count; ++i) {
+ if ( (mappings[i].sfm_size > codeSignedLength) || (mappings[i].sfm_file_offset > (codeSignedLength - mappings[i].sfm_size)) )
+ throw "dyld shared cache mapping not covered by code signature";
+ }
+
+ void *fdata = xmmap(NULL, firstPagesSize, PROT_READ|PROT_EXEC, MAP_PRIVATE, fd, 0);
+ if ( fdata == MAP_FAILED )
+ throwf("mmap() errno=%d validating first page of shared cache", errno);
+ if ( memcmp(fdata, firstPages, firstPagesSize) != 0 )
+ throwf("mmap() page compare failed for shared cache");
+ munmap(fdata, firstPagesSize);
+}
+
+static int __attribute__((noinline)) _shared_region_map_and_slide_np(int fd, uint32_t count, const shared_file_mapping_np mappings[],
+ long slide, void* slideInfo, unsigned long slideInfoSize)
+{
+ if ( gLinkContext.sharedRegionMode == ImageLoader::kUseSharedRegion ) {
+ return syscall(438, fd, count, mappings, slide, slideInfo, slideInfoSize);
}
// remove the shared region sub-map
-#if __ppc__ || __i386__
- vm_address_t addr = (vm_address_t)0x90000000;
- vm_deallocate(mach_task_self(), addr, 0x20000000);
-#elif __ppc64__ || __x86_64__
- vm_address_t addr = (vm_address_t)0x7FFF60000000;
- vm_deallocate(mach_task_self(), addr, 0x80000000);
-#endif
-
+ vm_deallocate(mach_task_self(), (vm_address_t)SHARED_REGION_BASE, SHARED_REGION_SIZE);
+
+ // notify gdb or other lurkers that this process is no longer using the shared region
+ dyld::gProcessInfo->processDetachedFromSharedRegion = true;
+
// map cache just for this process with mmap()
- bool failed = false;
- const shared_file_mapping_np* start = mappings;
- const shared_file_mapping_np* end = &mappings[count];
+ const shared_file_mapping_np* const start = mappings;
+ const shared_file_mapping_np* const end = &mappings[count];
for (const shared_file_mapping_np* p = start; p < end; ++p ) {
void* mmapAddress = (void*)(uintptr_t)(p->sfm_address);
size_t size = p->sfm_size;
+ //dyld::log("dyld: mapping address %p with size 0x%08lX\n", mmapAddress, size);
int protection = 0;
if ( p->sfm_init_prot & VM_PROT_EXECUTE )
protection |= PROT_EXEC;
@@ -2044,123 +3774,484 @@
if ( p->sfm_init_prot & VM_PROT_WRITE )
protection |= PROT_WRITE;
off_t offset = p->sfm_file_offset;
- mmapAddress = mmap(mmapAddress, size, protection, MAP_FIXED | MAP_PRIVATE, fd, offset);
- if ( mmap(mmapAddress, size, protection, MAP_FIXED | MAP_PRIVATE, fd, offset) != mmapAddress )
- failed = true;
- }
- if ( !failed ) {
- result = 0;
- gLinkContext.sharedRegionMode = ImageLoader::kUsePrivateSharedRegion;
- }
- else {
- result = -1;
- gLinkContext.sharedRegionMode = ImageLoader::kDontUseSharedRegion;
- if ( gLinkContext.verboseMapping )
- dyld::log("dyld: shared cached cannot be mapped\n");
- }
-
- return result;
-}
-
-
-
-#if __ppc__
- #define ARCH_NAME "ppc"
- #define ARCH_NAME_ROSETTA "rosetta"
- #define ARCH_VALUE CPU_TYPE_POWERPC
- #define ARCH_CACHE_MAGIC "dyld_v1 ppc"
-#elif __ppc64__
- #define ARCH_NAME "ppc64"
- #define ARCH_VALUE CPU_TYPE_POWERPC64
- #define ARCH_CACHE_MAGIC "dyld_v1 ppc64"
-#elif __i386__
- #define ARCH_NAME "i386"
- #define ARCH_VALUE CPU_TYPE_I386
- #define ARCH_CACHE_MAGIC "dyld_v1 i386"
-#elif __x86_64__
- #define ARCH_NAME "x86_64"
- #define ARCH_VALUE CPU_TYPE_X86_64
- #define ARCH_CACHE_MAGIC "dyld_v1 x86_64"
-#endif
+ if ( mmap(mmapAddress, size, protection, MAP_FIXED | MAP_PRIVATE, fd, offset) != mmapAddress ) {
+ // failed to map some chunk of this shared cache file
+ // clear shared region
+ vm_deallocate(mach_task_self(), (vm_address_t)SHARED_REGION_BASE, SHARED_REGION_SIZE);
+ // go back to not using shared region at all
+ gLinkContext.sharedRegionMode = ImageLoader::kDontUseSharedRegion;
+ if ( gLinkContext.verboseMapping ) {
+ dyld::log("dyld: shared cached region cannot be mapped at address %p with size 0x%08lX\n",
+ mmapAddress, size);
+ }
+ // return failure
+ return -1;
+ }
+ }
+
+ // update all __DATA pages with slide info
+ const dyld_cache_slide_info* slideInfoHeader = (dyld_cache_slide_info*)slideInfo;
+ if ( slideInfoHeader->version == 2 ) {
+ const dyld_cache_slide_info2* slideHeader = (dyld_cache_slide_info2*)slideInfo;
+ const uint32_t page_size = slideHeader->page_size;
+ const uint16_t* page_starts = (uint16_t*)((long)(slideInfo) + slideHeader->page_starts_offset);
+ const uint16_t* page_extras = (uint16_t*)((long)(slideInfo) + slideHeader->page_extras_offset);
+ const uintptr_t dataPagesStart = mappings[1].sfm_address;
+ for (int i=0; i < slideHeader->page_starts_count; ++i) {
+ uint8_t* page = (uint8_t*)(long)(dataPagesStart + (page_size*i));
+ uint16_t pageEntry = page_starts[i];
+ //dyld::log("page[%d]: page_starts[i]=0x%04X\n", i, pageEntry);
+ if ( pageEntry == DYLD_CACHE_SLIDE_PAGE_ATTR_NO_REBASE )
+ continue;
+ if ( pageEntry & DYLD_CACHE_SLIDE_PAGE_ATTR_EXTRA ) {
+ uint16_t chainIndex = (pageEntry & 0x3FFF);
+ bool done = false;
+ while ( !done ) {
+ uint16_t info = page_extras[chainIndex];
+ uint16_t pageStartOffset = (info & 0x3FFF)*4;
+ //dyld::log(" chain[%d] pageOffset=0x%03X\n", chainIndex, pageStartOffset);
+ rebaseChain(page, pageStartOffset, slide, slideHeader);
+ done = (info & DYLD_CACHE_SLIDE_PAGE_ATTR_END);
+ ++chainIndex;
+ }
+ }
+ else {
+ uint32_t pageOffset = pageEntry * 4;
+ //dyld::log(" start pageOffset=0x%03X\n", pageOffset);
+ rebaseChain(page, pageOffset, slide, slideHeader);
+ }
+ }
+ }
+ else if ( slide != 0 ) {
+ const uintptr_t dataPagesStart = mappings[1].sfm_address;
+ const uint16_t* toc = (uint16_t*)((long)(slideInfoHeader) + slideInfoHeader->toc_offset);
+ const uint8_t* entries = (uint8_t*)((long)(slideInfoHeader) + slideInfoHeader->entries_offset);
+ for(uint32_t i=0; i < slideInfoHeader->toc_count; ++i) {
+ const uint8_t* entry = &entries[toc[i]*slideInfoHeader->entries_size];
+ const uint8_t* page = (uint8_t*)(long)(dataPagesStart + (4096*i));
+ //dyld::log("page=%p toc[%d]=%d entries=%p\n", page, i, toc[i], entry);
+ for(int j=0; j < 128; ++j) {
+ uint8_t b = entry[j];
+ //dyld::log(" entry[%d] = 0x%02X\n", j, b);
+ if ( b != 0 ) {
+ for(int k=0; k < 8; ++k) {
+ if ( b & (1<<k) ) {
+ uintptr_t* p = (uintptr_t*)(page + j*8*4 + k*4);
+ uintptr_t value = *p;
+ //dyld::log(" *%p was 0x%lX will be 0x%lX\n", p, value, value+sSharedCacheSlide);
+ *p = value + slide;
+ }
+ }
+ }
+ }
+ }
+ }
+
+ // succesfully mapped shared cache for just this process
+ gLinkContext.sharedRegionMode = ImageLoader::kUsePrivateSharedRegion;
+
+ return 0;
+}
+
const void* imMemorySharedCacheHeader()
{
return sSharedCache;
}
+const char* getStandardSharedCacheFilePath()
+{
+#if __IPHONE_OS_VERSION_MIN_REQUIRED
+ return IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME;
+#else
+ #if __x86_64__
+ if ( sHaswell ) {
+ const char* path2 = MACOSX_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME_H;
+ struct stat statBuf;
+ if ( my_stat(path2, &statBuf) == 0 )
+ return path2;
+ }
+ #endif
+ return MACOSX_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME;
+#endif
+}
+
int openSharedCacheFile()
{
-#if __ppc__
- // rosetta cannot handle optimized _ppc cache, so it use _rosetta cache instead, rdar://problem/5495438
- if ( isRosetta() )
- return ::open(DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME_ROSETTA, O_RDONLY);
- else
-#endif
- return ::open(DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME, O_RDONLY);
+ char path[MAXPATHLEN];
+ strlcpy(path, sSharedCacheDir, MAXPATHLEN);
+ strlcat(path, "/", MAXPATHLEN);
+#if __x86_64__
+ if ( sHaswell ) {
+ strlcat(path, DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME_H, MAXPATHLEN);
+ int fd = my_open(path, O_RDONLY, 0);
+ if ( fd != -1 ) {
+ if ( gLinkContext.verboseMapping )
+ dyld::log("dyld: Mapping%s shared cache from %s\n", (gLinkContext.sharedRegionMode == ImageLoader::kUsePrivateSharedRegion) ? " private": "", path);
+ return fd;
+ }
+ strlcpy(path, sSharedCacheDir, MAXPATHLEN);
+ }
+#endif
+ strlcat(path, DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME, MAXPATHLEN);
+#if __IPHONE_OS_VERSION_MIN_REQUIRED
+ struct stat enableStatBuf;
+ struct stat devCacheStatBuf;
+ struct stat prodCacheStatBuf;
+ if ( ((my_stat(IPHONE_DYLD_SHARED_CACHE_DIR "enable-dylibs-to-override-cache", &enableStatBuf) == 0)
+ && (enableStatBuf.st_size < ENABLE_DYLIBS_TO_OVERRIDE_CACHE_SIZE)
+ && (my_stat(IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME DYLD_SHARED_CACHE_DEVELOPMENT_EXT, &devCacheStatBuf) == 0))
+ || (my_stat(IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME, &prodCacheStatBuf) != 0))
+ strlcat(path, DYLD_SHARED_CACHE_DEVELOPMENT_EXT, MAXPATHLEN);
+#endif
+ if ( gLinkContext.verboseMapping )
+ dyld::log("dyld: Mapping%s shared cache from %s\n", (gLinkContext.sharedRegionMode == ImageLoader::kUsePrivateSharedRegion) ? " private": "", path);
+ return my_open(path, O_RDONLY, 0);
+}
+
+
+static void getCacheBounds(uint32_t mappingsCount, const shared_file_mapping_np mappings[], uint64_t& lowAddress, uint64_t& highAddress)
+{
+ lowAddress = 0;
+ highAddress = 0;
+ for(uint32_t i=0; i < mappingsCount; ++i) {
+ if ( lowAddress == 0 ) {
+ lowAddress = mappings[i].sfm_address;
+ highAddress = mappings[i].sfm_address + mappings[i].sfm_size;
+ }
+ else {
+ if ( mappings[i].sfm_address < lowAddress )
+ lowAddress = mappings[i].sfm_address;
+ if ( (mappings[i].sfm_address + mappings[i].sfm_size) > highAddress )
+ highAddress = mappings[i].sfm_address + mappings[i].sfm_size;
+ }
+ }
+}
+
+static long pickCacheSlide(uint32_t mappingsCount, shared_file_mapping_np mappings[])
+{
+#if __x86_64__
+ // x86_64 has a two memory regions:
+ // 256MB at 0x00007FFF70000000
+ // 1024MB at 0x00007FFF80000000
+ // Some old shared caches have r/w region after rx region, so all regions slide within 1GB range
+ // Newer shared caches have r/w region based at 0x7FFF70000000 and r/o regions at 0x7FFF80000000, so each part has max slide
+ if ( (mappingsCount >= 3) && (mappings[1].sfm_init_prot == (VM_PROT_READ|VM_PROT_WRITE)) && (mappings[1].sfm_address == 0x00007FFF70000000) ) {
+ const uint64_t rwSize = mappings[1].sfm_size;
+ const uint64_t rwSlop = 0x10000000ULL - rwSize;
+ const uint64_t roSize = (mappings[2].sfm_address + mappings[2].sfm_size) - mappings[0].sfm_address;
+ const uint64_t roSlop = 0x40000000ULL - roSize;
+ const uint64_t space = (rwSlop < roSlop) ? rwSlop : roSlop;
+
+ // choose new random slide
+ long slide = (arc4random() % space) & (-4096);
+ //dyld::log("rwSlop=0x%0llX, roSlop=0x%0llX\n", rwSlop, roSlop);
+ //dyld::log("space=0x%0llX, slide=0x%0lX\n", space, slide);
+
+ // update mappings
+ for(uint32_t i=0; i < mappingsCount; ++i) {
+ mappings[i].sfm_address += slide;
+ }
+
+ return slide;
+ }
+ // else fall through to handle old style cache
+#endif
+ // get bounds of cache
+ uint64_t lowAddress;
+ uint64_t highAddress;
+ getCacheBounds(mappingsCount, mappings, lowAddress, highAddress);
+
+ // find slop space
+ const uint64_t space = (SHARED_REGION_BASE + SHARED_REGION_SIZE) - highAddress;
+
+ // choose new random slide
+#if __arm__
+ // <rdar://problem/20848977> change shared cache slide for 32-bit arm to always be 16k aligned
+ long slide = ((arc4random() % space) & (-16384));
+#else
+ long slide = dyld_page_trunc(arc4random() % space);
+#endif
+ //dyld::log("slideSpace=0x%0llX\n", space);
+ //dyld::log("slide=0x%0lX\n", slide);
+
+ // update mappings
+ for(uint32_t i=0; i < mappingsCount; ++i) {
+ mappings[i].sfm_address += slide;
+ }
+
+ return slide;
}
static void mapSharedCache()
-{
- uint64_t cacheBaseAddress;
- // quick check if a cache is alreay mapped into shared region
+{
+ uint64_t cacheBaseAddress = 0;
+ // quick check if a cache is already mapped into shared region
if ( _shared_region_check_np(&cacheBaseAddress) == 0 ) {
sSharedCache = (dyld_cache_header*)cacheBaseAddress;
// if we don't understand the currently mapped shared cache, then ignore
- if ( strcmp(sSharedCache->magic, ARCH_CACHE_MAGIC) != 0 ) {
+#if __x86_64__
+ const char* magic = (sHaswell ? ARCH_CACHE_MAGIC_H : ARCH_CACHE_MAGIC);
+#else
+ const char* magic = ARCH_CACHE_MAGIC;
+#endif
+ if ( strcmp(sSharedCache->magic, magic) != 0 ) {
sSharedCache = NULL;
- if ( gLinkContext.verboseMapping )
+ if ( gLinkContext.verboseMapping ) {
dyld::log("dyld: existing shared cached in memory is not compatible\n");
+ return;
+ }
+ }
+ // check if cache file is slidable
+ const dyld_cache_header* header = sSharedCache;
+ if ( (header->mappingOffset >= 0x48) && (header->slideInfoSize != 0) ) {
+ // solve for slide by comparing loaded address to address of first region
+ const uint8_t* loadedAddress = (uint8_t*)sSharedCache;
+ const dyld_cache_mapping_info* const mappings = (dyld_cache_mapping_info*)(loadedAddress+header->mappingOffset);
+ const uint8_t* preferedLoadAddress = (uint8_t*)(long)(mappings[0].address);
+ sSharedCacheSlide = loadedAddress - preferedLoadAddress;
+ dyld::gProcessInfo->sharedCacheSlide = sSharedCacheSlide;
+ dyld::gProcessInfo->sharedCacheBaseAddress = cacheBaseAddress;
+ //dyld::log("sSharedCacheSlide=0x%08lX, loadedAddress=%p, preferedLoadAddress=%p\n", sSharedCacheSlide, loadedAddress, preferedLoadAddress);
+ }
+ // if cache has a uuid, copy it
+ if ( header->mappingOffset >= 0x68 ) {
+ memcpy(dyld::gProcessInfo->sharedCacheUUID, header->uuid, 16);
+ }
+ // verbose logging
+ if ( gLinkContext.verboseMapping ) {
+ dyld::log("dyld: re-using existing %s shared cache mapping\n", (header->cacheType == kDyldSharedCacheTypeDevelopment ? "development" : "production"));
+ }
+ if (header->mappingOffset >= 0x68) {
+ dyld_kernel_image_info_t kernelCacheInfo;
+ memcpy(&kernelCacheInfo.uuid[0], &sSharedCache->uuid[0], sizeof(uuid_t));
+ kernelCacheInfo.load_addr = (uint64_t)sSharedCache;
+ kernelCacheInfo.fsobjid.fid_objno = 0;
+ kernelCacheInfo.fsobjid.fid_generation = 0;
+ kernelCacheInfo.fsid.val[0] = 0;
+ kernelCacheInfo.fsid.val[0] = 0;
+ task_register_dyld_shared_cache_image_info(mach_task_self(), kernelCacheInfo, false, false);
}
}
else {
+#if __i386__ || __x86_64__
+ // <rdar://problem/5925940> Safe Boot should disable dyld shared cache
+ // if we are in safe-boot mode and the cache was not made during this boot cycle,
+ // delete the cache file
+ uint32_t safeBootValue = 0;
+ size_t safeBootValueSize = sizeof(safeBootValue);
+ if ( (sysctlbyname("kern.safeboot", &safeBootValue, &safeBootValueSize, NULL, 0) == 0) && (safeBootValue != 0) ) {
+ // user booted machine in safe-boot mode
+ struct stat dyldCacheStatInfo;
+ // Don't use custom DYLD_SHARED_CACHE_DIR if provided, use standard path
+ if ( my_stat(MACOSX_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME, &dyldCacheStatInfo) == 0 ) {
+ struct timeval bootTimeValue;
+ size_t bootTimeValueSize = sizeof(bootTimeValue);
+ if ( (sysctlbyname("kern.boottime", &bootTimeValue, &bootTimeValueSize, NULL, 0) == 0) && (bootTimeValue.tv_sec != 0) ) {
+ // if the cache file was created before this boot, then throw it away and let it rebuild itself
+ if ( dyldCacheStatInfo.st_mtime < bootTimeValue.tv_sec ) {
+ ::unlink(MACOSX_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME);
+ gLinkContext.sharedRegionMode = ImageLoader::kDontUseSharedRegion;
+ return;
+ }
+ }
+ }
+ }
+#endif
// map in shared cache to shared region
int fd = openSharedCacheFile();
if ( fd != -1 ) {
- uint8_t firstPage[4096];
- if ( ::read(fd, firstPage, 4096) == 4096 ) {
- dyld_cache_header* header = (dyld_cache_header*)firstPage;
- if ( strcmp(header->magic, ARCH_CACHE_MAGIC) == 0 ) {
- const shared_file_mapping_np* mappings = (shared_file_mapping_np*)&firstPage[header->mappingOffset];
- const shared_file_mapping_np* const end = &mappings[header->mappingCount];
+ uint8_t firstPages[8192];
+ if ( ::read(fd, firstPages, 8192) == 8192 ) {
+ dyld_cache_header* header = (dyld_cache_header*)firstPages;
+ #if __x86_64__
+ const char* magic = (sHaswell ? ARCH_CACHE_MAGIC_H : ARCH_CACHE_MAGIC);
+ #else
+ const char* magic = ARCH_CACHE_MAGIC;
+ #endif
+ if ( strcmp(header->magic, magic) == 0 ) {
+ const dyld_cache_mapping_info* const fileMappingsStart = (dyld_cache_mapping_info*)&firstPages[header->mappingOffset];
+ const dyld_cache_mapping_info* const fileMappingsEnd = &fileMappingsStart[header->mappingCount];
+ #if __IPHONE_OS_VERSION_MIN_REQUIRED
+ if ( (header->mappingCount != 3)
+ || (header->mappingOffset > 256)
+ || (fileMappingsStart[0].fileOffset != 0)
+ || (fileMappingsStart[0].address != SHARED_REGION_BASE)
+ || ((fileMappingsStart[0].address + fileMappingsStart[0].size) > fileMappingsStart[1].address)
+ || ((fileMappingsStart[1].address + fileMappingsStart[1].size) > fileMappingsStart[2].address)
+ || ((fileMappingsStart[0].fileOffset + fileMappingsStart[0].size) != fileMappingsStart[1].fileOffset)
+ || ((fileMappingsStart[1].fileOffset + fileMappingsStart[1].size) != fileMappingsStart[2].fileOffset) )
+ throw "dyld shared cache file is invalid";
+ #endif
+ shared_file_mapping_np mappings[header->mappingCount];
+ unsigned int mappingCount = header->mappingCount;
+ int readWriteMappingIndex = -1;
+ int readOnlyMappingIndex = -1;
// validate that the cache file has not been truncated
bool goodCache = false;
struct stat stat_buf;
if ( fstat(fd, &stat_buf) == 0 ) {
goodCache = true;
- for (const shared_file_mapping_np* p = mappings; p < end; ++p) {
+ int i=0;
+ for (const dyld_cache_mapping_info* p = fileMappingsStart; p < fileMappingsEnd; ++p, ++i) {
+ mappings[i].sfm_address = p->address;
+ mappings[i].sfm_size = p->size;
+ mappings[i].sfm_file_offset = p->fileOffset;
+ mappings[i].sfm_max_prot = p->maxProt;
+ mappings[i].sfm_init_prot = p->initProt;
// rdar://problem/5694507 old update_dyld_shared_cache tool could make a cache file
// that is not page aligned, but otherwise ok.
- if ( p->sfm_file_offset+p->sfm_size > (uint64_t)(stat_buf.st_size+4095 & (-4096)) )
+ if ( p->fileOffset+p->size > (uint64_t)(stat_buf.st_size+4095 & (-4096)) ) {
+ dyld::log("dyld: shared cached file is corrupt: %s" DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME "\n", sSharedCacheDir);
goodCache = false;
+ }
+ if ( (mappings[i].sfm_init_prot & (VM_PROT_READ|VM_PROT_WRITE)) == (VM_PROT_READ|VM_PROT_WRITE) ) {
+ readWriteMappingIndex = i;
+ }
+ if ( mappings[i].sfm_init_prot == VM_PROT_READ ) {
+ readOnlyMappingIndex = i;
+ }
+ }
+ // if shared cache is code signed, add a mapping for the code signature
+ uint64_t signatureSize = header->codeSignatureSize;
+ // zero size in header means signature runs to end-of-file
+ if ( signatureSize == 0 )
+ signatureSize = stat_buf.st_size - header->codeSignatureOffset;
+ if ( signatureSize != 0 ) {
+#if __arm__ || __arm64__
+ size_t alignedSignatureSize = (signatureSize+16383) & (-16384);
+#else
+ size_t alignedSignatureSize = (signatureSize+4095) & (-4096);
+#endif
+ // <rdar://problem/23188073> validate code signature covers entire shared cache
+ loadAndCheckCodeSignature(fd, mappingCount, mappings, header->codeSignatureOffset, alignedSignatureSize, firstPages, sizeof(firstPages));
+ }
+#if __IPHONE_OS_VERSION_MIN_REQUIRED
+ else {
+ throw "dyld shared cache file not code signed";
+ }
+#endif
+ }
+#if __MAC_OS_X_VERSION_MIN_REQUIRED
+ // sanity check that /usr/lib/libSystem.B.dylib stat() info matches cache
+ if ( header->imagesCount * sizeof(dyld_cache_image_info) + header->imagesOffset < 8192 ) {
+ bool foundLibSystem = false;
+ if ( my_stat("/usr/lib/libSystem.B.dylib", &stat_buf) == 0 ) {
+ const dyld_cache_image_info* images = (dyld_cache_image_info*)&firstPages[header->imagesOffset];
+ const dyld_cache_image_info* const imagesEnd = &images[header->imagesCount];
+ for (const dyld_cache_image_info* p = images; p < imagesEnd; ++p) {
+ if ( ((time_t)p->modTime == stat_buf.st_mtime) && ((ino_t)p->inode == stat_buf.st_ino) ) {
+ foundLibSystem = true;
+ break;
+ }
+ }
+ }
+ if ( !sSharedCacheIgnoreInodeAndTimeStamp && !foundLibSystem ) {
+ dyld::log("dyld: shared cached file was built against a different libSystem.dylib, ignoring cache.\n"
+ "to update dyld shared cache run: 'sudo update_dyld_shared_cache' then reboot.\n");
+ goodCache = false;
}
}
+#endif
+#if __IPHONE_OS_VERSION_MIN_REQUIRED
+ {
+ uint64_t lowAddress;
+ uint64_t highAddress;
+ getCacheBounds(mappingCount, mappings, lowAddress, highAddress);
+ if ( (highAddress-lowAddress) > SHARED_REGION_SIZE )
+ throw "dyld shared cache is too big to fit in shared region";
+ }
+#endif
+
+ if ( goodCache && (readWriteMappingIndex == -1) ) {
+ dyld::log("dyld: shared cached file is missing read/write mapping: %s" DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME "\n", sSharedCacheDir);
+ goodCache = false;
+ }
+ if ( goodCache && (readOnlyMappingIndex == -1) ) {
+ dyld::log("dyld: shared cached file is missing read-only mapping: %s" DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME "\n", sSharedCacheDir);
+ goodCache = false;
+ }
if ( goodCache ) {
- const shared_file_mapping_np* mappings = (shared_file_mapping_np*)&firstPage[header->mappingOffset];
- if (_shared_region_map_np(fd, header->mappingCount, mappings) == 0) {
- // sucessfully mapped cache into shared region
+ long cacheSlide = 0;
+ void* slideInfo = (void*)(long)(mappings[readOnlyMappingIndex].sfm_address + (header->slideInfoOffset - mappings[readOnlyMappingIndex].sfm_file_offset));;
+ uint64_t slideInfoSize = header->slideInfoSize;
+ // check if shared cache contains slid info
+ if ( slideInfoSize != 0 ) {
+ // <rdar://problem/8611968> don't slide shared cache if ASLR disabled (main executable didn't slide)
+ if ( sMainExecutable->isPositionIndependentExecutable() && (sMainExecutable->getSlide() == 0) ) {
+ cacheSlide = 0;
+ }
+ else {
+ // generate random slide amount
+ cacheSlide = pickCacheSlide(mappingCount, mappings);
+ }
+
+ slideInfo = (void*)((uint8_t*)slideInfo + cacheSlide);
+ // add VM_PROT_SLIDE bit to __DATA area of cache
+ mappings[readWriteMappingIndex].sfm_max_prot |= VM_PROT_SLIDE;
+ mappings[readWriteMappingIndex].sfm_init_prot |= VM_PROT_SLIDE;
+ }
+ if ( gLinkContext.verboseMapping ) {
+ dyld::log("dyld: calling _shared_region_map_and_slide_np() with regions:\n");
+ for (int i=0; i < mappingCount; ++i) {
+ dyld::log(" address=0x%08llX, size=0x%08llX, fileOffset=0x%08llX\n", mappings[i].sfm_address, mappings[i].sfm_size, mappings[i].sfm_file_offset);
+ }
+ }
+
+ if (_shared_region_map_and_slide_np(fd, mappingCount, mappings, cacheSlide, slideInfo, slideInfoSize) == 0) {
+ // successfully mapped cache into shared region
sSharedCache = (dyld_cache_header*)mappings[0].sfm_address;
+ sSharedCacheSlide = cacheSlide;
+ dyld::gProcessInfo->sharedCacheSlide = cacheSlide;
+ dyld::gProcessInfo->sharedCacheBaseAddress = mappings[0].sfm_address;
+ //dyld::log("sSharedCache=%p sSharedCacheSlide=0x%08lX\n", sSharedCache, sSharedCacheSlide);
+ // if cache has a uuid, copy it
+ if ( header->mappingOffset >= 0x68 ) {
+ const bool privateSharedCache = gLinkContext.sharedRegionMode == ImageLoader::kUsePrivateSharedRegion;
+ memcpy(dyld::gProcessInfo->sharedCacheUUID, header->uuid, 16);
+ dyld_kernel_image_info_t kernelCacheInfo;
+ memcpy(&kernelCacheInfo.uuid[0], &sSharedCache->uuid[0], sizeof(uuid_t));
+ kernelCacheInfo.load_addr = (uint64_t)sSharedCache;
+ kernelCacheInfo.fsobjid.fid_objno = 0;
+ kernelCacheInfo.fsobjid.fid_generation = 0;
+ kernelCacheInfo.fsid.val[0] = 0;
+ kernelCacheInfo.fsid.val[0] = 0;
+ if (privateSharedCache) {
+ kernelCacheInfo.fsobjid = *(fsobj_id_t*)(&stat_buf.st_ino);
+ struct statfs statfs_buf;
+ if ( fstatfs(fd, &statfs_buf) == 0 ) {
+ kernelCacheInfo.fsid = statfs_buf.f_fsid;
+ }
+ }
+ task_register_dyld_shared_cache_image_info(mach_task_self(), kernelCacheInfo, false, privateSharedCache);
+ }
}
- }
- else {
- gSharedCacheNeedsUpdating = true;
- dyld::log("dyld: shared cached file is corrupt: " DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME "\n");
+ else {
+#if __IPHONE_OS_VERSION_MIN_REQUIRED
+ throwf("dyld shared cache could not be mapped. errno=%d, slide=0x%08lX, slideInfo=%p, slideInfoSize=0x%08llX, mappingCount=%u, "
+ "address/size/off/init/max [0]=0x%0llX/0x%0llX/0x%0llX/0x%02X/0x%02X, [1]=0x%0llX/0x%0llX/0x%0llX/0x%02X/0x%02X, [2]=0x%0llX/0x%0llX/0x%0llX/0x%02X/0x%02X",
+ errno, cacheSlide, slideInfo, slideInfoSize, mappingCount,
+ mappings[0].sfm_address, mappings[0].sfm_size, mappings[0].sfm_file_offset, mappings[0].sfm_init_prot, mappings[0].sfm_max_prot,
+ mappings[1].sfm_address, mappings[1].sfm_size, mappings[1].sfm_file_offset, mappings[1].sfm_init_prot, mappings[1].sfm_max_prot,
+ mappings[2].sfm_address, mappings[2].sfm_size, mappings[2].sfm_file_offset, mappings[2].sfm_init_prot, mappings[2].sfm_max_prot);
+#endif
+ if ( gLinkContext.verboseMapping )
+ dyld::log("dyld: shared cached file could not be mapped\n");
+ }
}
}
else {
- gSharedCacheNeedsUpdating = true;
if ( gLinkContext.verboseMapping )
dyld::log("dyld: shared cached file is invalid\n");
}
}
else {
- gSharedCacheNeedsUpdating = true;
if ( gLinkContext.verboseMapping )
dyld::log("dyld: shared cached file cannot be read\n");
}
close(fd);
}
else {
- gSharedCacheNotFound = true;
if ( gLinkContext.verboseMapping )
dyld::log("dyld: shared cached file cannot be opened\n");
}
@@ -2173,39 +4264,61 @@
// tell gdb where the shared cache is
if ( sSharedCache != NULL ) {
- const shared_file_mapping_np* const start = (shared_file_mapping_np*)((uint8_t*)sSharedCache + sSharedCache->mappingOffset);
+ const dyld_cache_mapping_info* const start = (dyld_cache_mapping_info*)((uint8_t*)sSharedCache + sSharedCache->mappingOffset);
dyld_shared_cache_ranges.sharedRegionsCount = sSharedCache->mappingCount;
// only room to tell gdb about first four regions
if ( dyld_shared_cache_ranges.sharedRegionsCount > 4 )
dyld_shared_cache_ranges.sharedRegionsCount = 4;
+ const dyld_cache_mapping_info* const end = &start[dyld_shared_cache_ranges.sharedRegionsCount];
+ int index = 0;
+ for (const dyld_cache_mapping_info* p = start; p < end; ++p, ++index ) {
+ dyld_shared_cache_ranges.ranges[index].start = p->address+sSharedCacheSlide;
+ dyld_shared_cache_ranges.ranges[index].length = p->size;
+ if ( gLinkContext.verboseMapping ) {
+ dyld::log(" 0x%08llX->0x%08llX %s%s%s init=%x, max=%x\n",
+ p->address+sSharedCacheSlide, p->address+sSharedCacheSlide+p->size-1,
+ ((p->initProt & VM_PROT_READ) ? "read " : ""),
+ ((p->initProt & VM_PROT_WRITE) ? "write " : ""),
+ ((p->initProt & VM_PROT_EXECUTE) ? "execute " : ""), p->initProt, p->maxProt);
+ }
+ #if __i386__
+ // If a non-writable and executable region is found in the R/W shared region, then this is __IMPORT segments
+ // This is an old cache. Make writable. dyld no longer supports turn W on and off as it binds
+ if ( (p->initProt == (VM_PROT_READ|VM_PROT_EXECUTE)) && ((p->address & 0xF0000000) == 0xA0000000) ) {
+ if ( p->size != 0 ) {
+ vm_prot_t prot = VM_PROT_EXECUTE | PROT_READ | VM_PROT_WRITE;
+ vm_protect(mach_task_self(), p->address, p->size, false, prot);
+ if ( gLinkContext.verboseMapping ) {
+ dyld::log("%18s at 0x%08llX->0x%08llX altered permissions to %c%c%c\n", "", p->address,
+ p->address+p->size-1,
+ (prot & PROT_READ) ? 'r' : '.', (prot & PROT_WRITE) ? 'w' : '.', (prot & PROT_EXEC) ? 'x' : '.' );
+ }
+ }
+ }
+ #endif
+ }
if ( gLinkContext.verboseMapping ) {
- if ( gLinkContext.sharedRegionMode == ImageLoader::kUseSharedRegion )
- dyld::log("dyld: Mapping shared cache\n");
- else if ( gLinkContext.sharedRegionMode == ImageLoader::kUsePrivateSharedRegion )
- dyld::log("dyld: Mapping private shared cache\n");
- }
- const shared_file_mapping_np* const end = &start[dyld_shared_cache_ranges.sharedRegionsCount];
- int index = 0;
- for (const shared_file_mapping_np* p = start; p < end; ++p, ++index ) {
- dyld_shared_cache_ranges.ranges[index].start = p->sfm_address;
- dyld_shared_cache_ranges.ranges[index].length = p->sfm_size;
- if ( gLinkContext.verboseMapping ) {
- dyld::log(" 0x%08llX->0x%08llX %s%s%s init=%x, max=%x\n", p->sfm_address, p->sfm_address+p->sfm_size-1,
- ((p->sfm_init_prot & VM_PROT_READ) ? "read " : ""),
- ((p->sfm_init_prot & VM_PROT_WRITE) ? "write " : ""),
- ((p->sfm_init_prot & VM_PROT_EXECUTE) ? "execute " : ""), p->sfm_init_prot, p->sfm_max_prot);
- }
- #if __i386__
- // record if a non-writable and executable region is found in the R/W shared region
- // this is the __IMPORT segments. dyld will turn write protection on and off as needed
- if ( (p->sfm_init_prot == (VM_PROT_READ|VM_PROT_EXECUTE)) && ((p->sfm_address & 0xF0000000) == 0xA0000000) ) {
- sImportSegmentsStart = p->sfm_address;
- sImportSegmentsSize = p->sfm_size;
- makeSharedCacheImportSegmentsWritable(true);
- }
- #endif
- }
-
+ // list the code blob
+ dyld_cache_header* header = (dyld_cache_header*)sSharedCache;
+ uint64_t signatureSize = header->codeSignatureSize;
+ // zero size in header means signature runs to end-of-file
+ if ( signatureSize == 0 ) {
+ struct stat stat_buf;
+ // FIXME: need size of cache file actually used
+ if ( my_stat(IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME, &stat_buf) == 0 )
+ signatureSize = stat_buf.st_size - header->codeSignatureOffset;
+ }
+ if ( signatureSize != 0 ) {
+ const dyld_cache_mapping_info* const last = &start[dyld_shared_cache_ranges.sharedRegionsCount-1];
+ uint64_t codeBlobStart = last->address + last->size;
+ dyld::log(" 0x%08llX->0x%08llX (code signature)\n", codeBlobStart, codeBlobStart+signatureSize);
+ }
+ }
+ #if SUPPORT_ACCELERATE_TABLES
+ if ( !dylibsCanOverrideCache() && !sDisableAcceleratorTables && (sSharedCache->mappingOffset > 0x80) && (sSharedCache->accelerateInfoAddr != 0) ) {
+ sAllCacheImagesProxy = ImageLoaderMegaDylib::makeImageLoaderMegaDylib(sSharedCache, sSharedCacheSlide, gLinkContext);
+ }
+ #endif
}
}
#endif // #if DYLD_SHARED_CACHE_SUPPORT
@@ -2215,8 +4328,6 @@
// create when NSLinkModule is called for a second time on a bundle
ImageLoader* cloneImage(ImageLoader* image)
{
- const uint64_t offsetInFat = image->getOffsetInFatFile();
-
// open file (automagically closed when this function exits)
FileOpener file(image->getPath());
@@ -2224,24 +4335,19 @@
if ( fstat(file.getFileDescriptor(), &stat_buf) == -1)
throw "stat error";
- // read first page of file
- uint8_t firstPage[4096];
- pread(file.getFileDescriptor(), firstPage, 4096, offsetInFat);
-
- // fat length is only used for sanity checking, since this image was already loaded once, just use upper bound
- uint64_t lenInFat = stat_buf.st_size - offsetInFat;
-
- // try mach-o loader
- if ( isCompatibleMachO(firstPage) ) {
- ImageLoader* clone = new ImageLoaderMachO(image->getPath(), file.getFileDescriptor(), firstPage, offsetInFat, lenInFat, stat_buf, gLinkContext);
- // don't add bundles to global list, they can be loaded but not linked. When linked it will be added to list
- if ( ! image->isBundle() )
- addImage(clone);
- return clone;
- }
-
- // try other file formats...
- throw "can't clone image";
+ dyld::LoadContext context;
+ context.useSearchPaths = false;
+ context.useFallbackPaths = false;
+ context.useLdLibraryPath = false;
+ context.implicitRPath = false;
+ context.matchByInstallName = false;
+ context.dontLoad = false;
+ context.mustBeBundle = true;
+ context.mustBeDylib = false;
+ context.canBePIE = false;
+ context.origin = NULL;
+ context.rpath = NULL;
+ return loadPhase6(file.getFileDescriptor(), stat_buf, image->getPath(), context);
}
@@ -2262,8 +4368,8 @@
}
// try each loader
- if ( isCompatibleMachO(mem) ) {
- ImageLoader* image = new ImageLoaderMachO(moduleName, (mach_header*)mem, len, gLinkContext);
+ if ( isCompatibleMachO(mem, moduleName) ) {
+ ImageLoader* image = ImageLoaderMachO::instantiateFromMemory(moduleName, (macho_header*)mem, len, gLinkContext);
// don't add bundles to global list, they can be loaded but not linked. When linked it will be added to list
if ( ! image->isBundle() )
addImage(image);
@@ -2297,10 +4403,22 @@
if ( image->getState() >= dyld_image_state_bound && image->getState() < dyld_image_state_terminated )
(*func)(image->machHeader(), image->getSlide());
}
+#if SUPPORT_ACCELERATE_TABLES
+ if ( sAllCacheImagesProxy != NULL ) {
+ dyld_image_info infos[allImagesCount()+1];
+ unsigned cacheCount = sAllCacheImagesProxy->appendImagesToNotify(dyld_image_state_bound, true, infos);
+ for (unsigned i=0; i < cacheCount; ++i) {
+ (*func)(infos[i].imageLoadAddress, sSharedCacheSlide);
+ }
+ }
+#endif
}
void registerRemoveCallback(ImageCallback func)
{
+ // <rdar://problem/15025198> ignore calls to register a notification during a notification
+ if ( sRemoveImageCallbacksInUse )
+ return;
sRemoveImageCallbacks.push_back(func);
}
@@ -2312,8 +4430,7 @@
void setErrorMessage(const char* message)
{
// save off error message in global buffer for CrashReporter to find
- strncpy(error_string, message, sizeof(error_string)-1);
- error_string[sizeof(error_string)-1] = '\0';
+ strlcpy(error_string, message, sizeof(error_string));
}
const char* getErrorMessage()
@@ -2321,14 +4438,49 @@
return error_string;
}
-
-void halt(const char* message)
+void halt(const char* message)
{
dyld::log("dyld: %s\n", message);
setErrorMessage(message);
- strncpy(error_string, message, sizeof(error_string)-1);
- error_string[sizeof(error_string)-1] = '\0';
- dyld_fatal_error(error_string);
+ dyld::gProcessInfo->errorMessage = error_string;
+ if ( !gLinkContext.startedInitializingMainExecutable )
+ dyld::gProcessInfo->terminationFlags = 1;
+ else
+ dyld::gProcessInfo->terminationFlags = 0;
+
+ char payloadBuffer[EXIT_REASON_PAYLOAD_MAX_LEN];
+ dyld_abort_payload* payload = (dyld_abort_payload*)payloadBuffer;
+ payload->version = 1;
+ payload->flags = gLinkContext.startedInitializingMainExecutable ? 0 : 1;
+ payload->targetDylibPathOffset = 0;
+ payload->clientPathOffset = 0;
+ payload->symbolOffset = 0;
+ int payloadSize = sizeof(dyld_abort_payload);
+
+ if ( dyld::gProcessInfo->errorTargetDylibPath != NULL ) {
+ payload->targetDylibPathOffset = payloadSize;
+ payloadSize += strlcpy(&payloadBuffer[payloadSize], dyld::gProcessInfo->errorTargetDylibPath, sizeof(payloadBuffer)-payloadSize) + 1;
+ }
+ if ( dyld::gProcessInfo->errorClientOfDylibPath != NULL ) {
+ payload->clientPathOffset = payloadSize;
+ payloadSize += strlcpy(&payloadBuffer[payloadSize], dyld::gProcessInfo->errorClientOfDylibPath, sizeof(payloadBuffer)-payloadSize) + 1;
+ }
+ if ( dyld::gProcessInfo->errorSymbol != NULL ) {
+ payload->symbolOffset = payloadSize;
+ payloadSize += strlcpy(&payloadBuffer[payloadSize], dyld::gProcessInfo->errorSymbol, sizeof(payloadBuffer)-payloadSize) + 1;
+ }
+ char truncMessage[EXIT_REASON_USER_DESC_MAX_LEN];
+ strlcpy(truncMessage, message, EXIT_REASON_USER_DESC_MAX_LEN);
+ abort_with_payload(OS_REASON_DYLD, dyld::gProcessInfo->errorKind ? dyld::gProcessInfo->errorKind : DYLD_EXIT_REASON_OTHER, payloadBuffer, payloadSize, truncMessage, 0);
+}
+
+static void setErrorStrings(unsigned errorCode, const char* errorClientOfDylibPath,
+ const char* errorTargetDylibPath, const char* errorSymbol)
+{
+ dyld::gProcessInfo->errorKind = errorCode;
+ dyld::gProcessInfo->errorClientOfDylibPath = errorClientOfDylibPath;
+ dyld::gProcessInfo->errorTargetDylibPath = errorTargetDylibPath;
+ dyld::gProcessInfo->errorSymbol = errorSymbol;
}
@@ -2346,7 +4498,7 @@
#if __i386__
// fast stubs pass NULL for mh and image is instead found via the location of stub (aka lazyPointer)
if ( mh == NULL )
- target = dyld::findImageContainingAddressThreadSafe(lazyPointer);
+ target = dyld::findImageContainingAddress(lazyPointer);
else
target = dyld::findImageByMachHeader(mh);
#else
@@ -2371,12 +4523,50 @@
}
-// SPI used by ZeroLink to lazy load bundles
-void registerZeroLinkHandlers(BundleNotificationCallBack notify, BundleLocatorCallBack locate)
-{
- sBundleNotifier = notify;
- sBundleLocation = locate;
-}
+uintptr_t fastBindLazySymbol(ImageLoader** imageLoaderCache, uintptr_t lazyBindingInfoOffset)
+{
+ uintptr_t result = 0;
+ // get image
+ if ( *imageLoaderCache == NULL ) {
+ // save in cache
+ *imageLoaderCache = dyld::findMappedRange((uintptr_t)imageLoaderCache);
+ if ( *imageLoaderCache == NULL ) {
+#if SUPPORT_ACCELERATE_TABLES
+ if ( sAllCacheImagesProxy != NULL ) {
+ const mach_header* mh;
+ const char* path;
+ unsigned index;
+ if ( sAllCacheImagesProxy->addressInCache(imageLoaderCache, &mh, &path, &index) ) {
+ result = sAllCacheImagesProxy->bindLazy(lazyBindingInfoOffset, gLinkContext, mh, index);
+ if ( result == 0 ) {
+ halt("dyld: lazy symbol binding failed for image in dyld shared\n");
+ }
+ return result;
+ }
+ }
+#endif
+ const char* message = "fast lazy binding from unknown image";
+ dyld::log("dyld: %s\n", message);
+ halt(message);
+ }
+ }
+
+ // bind lazy pointer and return it
+ try {
+ result = (*imageLoaderCache)->doBindFastLazySymbol((uint32_t)lazyBindingInfoOffset, gLinkContext,
+ (dyld::gLibSystemHelpers != NULL) ? dyld::gLibSystemHelpers->acquireGlobalDyldLock : NULL,
+ (dyld::gLibSystemHelpers != NULL) ? dyld::gLibSystemHelpers->releaseGlobalDyldLock : NULL);
+ }
+ catch (const char* message) {
+ dyld::log("dyld: lazy symbol binding failed: %s\n", message);
+ halt(message);
+ }
+
+ // return target address to glue which jumps to it with real parameters restored
+ return result;
+}
+
+
void registerUndefinedHandler(UndefinedHandler handler)
{
@@ -2392,53 +4582,11 @@
static bool findExportedSymbol(const char* name, bool onlyInCoalesced, const ImageLoader::Symbol** sym, const ImageLoader** image)
{
- // try ZeroLink short cut to finding bundle which exports this symbol
- if ( sBundleLocation != NULL ) {
- ImageLoader* zlImage = (*sBundleLocation)(name);
- if ( zlImage == ((ImageLoader*)(-1)) ) {
- // -1 is magic value that request symbol is in a bundle not yet linked into process
- // try calling handler to link in that symbol
- undefinedHandler(name);
- // call locator again
- zlImage = (*sBundleLocation)(name);
- }
- // if still not found, then ZeroLink has no idea where to find it
- if ( zlImage == ((ImageLoader*)(-1)) )
- return false;
- if ( zlImage != NULL ) {
- // ZeroLink cache knows where the symbol is
- if ( onlyInCoalesced ) {
- // but ZeroLink does not know about coalescing weak symbols, so ignore ZeroLink's hint when onlyInCoalesced==true
- }
- else {
- *sym = zlImage->findExportedSymbol(name, NULL, false, image);
- if ( *sym != NULL ) {
- *image = zlImage;
- return true;
- }
- }
- }
- else {
- // ZeroLink says it is in some bundle already loaded, but not linked, walk them all
- const unsigned int imageCount = sAllImages.size();
- for(unsigned int i=0; i < imageCount; ++i){
- ImageLoader* anImage = sAllImages[i];
- if ( anImage->isBundle() && !anImage->hasHiddenExports() ) {
- //dyld::log("dyld: search for %s in %s\n", name, anImage->getPath());
- *sym = anImage->findExportedSymbol(name, NULL, false, image);
- if ( *sym != NULL ) {
- return true;
- }
- }
- }
- }
- }
-
// search all images in order
const ImageLoader* firstWeakImage = NULL;
const ImageLoader::Symbol* firstWeakSym = NULL;
- const unsigned int imageCount = sAllImages.size();
- for(unsigned int i=0; i < imageCount; ++i) {
+ const size_t imageCount = sAllImages.size();
+ for(size_t i=0; i < imageCount; ++i) {
ImageLoader* anImage = sAllImages[i];
// the use of inserted libraries alters search order
// so that inserted libraries are found before the main executable
@@ -2449,7 +4597,7 @@
anImage = sAllImages[0];
}
if ( ! anImage->hasHiddenExports() && (!onlyInCoalesced || anImage->hasCoalescedExports()) ) {
- *sym = anImage->findExportedSymbol(name, NULL, false, image);
+ *sym = anImage->findExportedSymbol(name, false, image);
if ( *sym != NULL ) {
// if weak definition found, record first one found
if ( ((*image)->getExportedSymbolInfo(*sym) & ImageLoader::kWeakDefinition) != 0 ) {
@@ -2471,7 +4619,13 @@
*image = firstWeakImage;
return true;
}
-
+#if SUPPORT_ACCELERATE_TABLES
+ if ( sAllCacheImagesProxy != NULL ) {
+ if ( sAllCacheImagesProxy->flatFindSymbol(name, onlyInCoalesced, sym, image) )
+ return true;
+ }
+#endif
+
return false;
}
@@ -2489,12 +4643,12 @@
bool flatFindExportedSymbolWithHint(const char* name, const char* librarySubstring, const ImageLoader::Symbol** sym, const ImageLoader** image)
{
// search all images in order
- const unsigned int imageCount = sAllImages.size();
- for(unsigned int i=0; i < imageCount; ++i){
+ const size_t imageCount = sAllImages.size();
+ for(size_t i=0; i < imageCount; ++i){
ImageLoader* anImage = sAllImages[i];
// only look at images whose paths contain the hint string (NULL hint string is wildcard)
if ( ! anImage->isBundle() && ((librarySubstring==NULL) || (strstr(anImage->getPath(), librarySubstring) != NULL)) ) {
- *sym = anImage->findExportedSymbol(name, NULL, false, image);
+ *sym = anImage->findExportedSymbol(name, false, image);
if ( *sym != NULL ) {
return true;
}
@@ -2502,6 +4656,27 @@
}
return false;
}
+
+
+unsigned int getCoalescedImages(ImageLoader* images[], unsigned imageIndex[])
+{
+ unsigned int count = 0;
+ for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
+ ImageLoader* image = *it;
+ if ( image->participatesInCoalescing() ) {
+ images[count] = *it;
+ imageIndex[count] = 0;
+ ++count;
+ }
+ }
+#if SUPPORT_ACCELERATE_TABLES
+ if ( sAllCacheImagesProxy != NULL ) {
+ sAllCacheImagesProxy->appendImagesNeedingCoalescing(images, imageIndex, count);
+ }
+#endif
+ return count;
+}
+
static ImageLoader::MappedRegion* getMappedRegions(ImageLoader::MappedRegion* regions)
{
@@ -2522,14 +4697,19 @@
// add to list of handlers
std::vector<dyld_image_state_change_handler>* handlers = stateToHandlers(state, sSingleHandlers);
if ( handlers != NULL ) {
- handlers->push_back(handler);
+ // <rdar://problem/10332417> need updateAllImages() to be last in dyld_image_state_mapped list
+ // so that if ObjC adds a handler that prevents a load, it happens before the gdb list is updated
+ if ( state == dyld_image_state_mapped )
+ handlers->insert(handlers->begin(), handler);
+ else
+ handlers->push_back(handler);
// call callback with all existing images
for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
ImageLoader* image = *it;
dyld_image_info info;
info.imageLoadAddress = image->machHeader();
- info.imageFilePath = image->getPath();
+ info.imageFilePath = image->getRealPath();
info.imageFileModDate = image->lastModified();
// should only call handler if state == image->state
if ( image->getState() == state )
@@ -2554,7 +4734,7 @@
// call callback with all existing images
try {
- notifyBatchPartial(state, true, handler);
+ notifyBatchPartial(state, true, handler, false, false);
}
catch (const char* msg) {
// ignore request to abort during registration
@@ -2562,20 +4742,127 @@
}
}
-static ImageLoader* libraryLocator(const char* libraryName, bool search, bool findDLL, const char* origin, const ImageLoader::RPathChain* rpaths)
+
+void registerObjCNotifiers(_dyld_objc_notify_mapped mapped, _dyld_objc_notify_init init, _dyld_objc_notify_unmapped unmapped)
+{
+ // record functions to call
+ sNotifyObjCMapped = mapped;
+ sNotifyObjCInit = init;
+ sNotifyObjCUnmapped = unmapped;
+
+ // call 'mapped' function with all images mapped so far
+ try {
+ notifyBatchPartial(dyld_image_state_bound, true, NULL, false, true);
+ }
+ catch (const char* msg) {
+ // ignore request to abort during registration
+ }
+}
+
+bool sharedCacheUUID(uuid_t uuid)
+{
+#if DYLD_SHARED_CACHE_SUPPORT
+ if ( sSharedCache == NULL )
+ return false;
+
+ memcpy(uuid, sSharedCache->uuid, 16);
+ return true;
+#else
+ return false;
+#endif
+}
+
+#if SUPPORT_ACCELERATE_TABLES
+
+bool dlopenFromCache(const char* path, int mode, void** handle)
+{
+ if ( sAllCacheImagesProxy == NULL )
+ return false;
+ bool result = sAllCacheImagesProxy->dlopenFromCache(gLinkContext, path, mode, handle);
+ if ( !result && (strchr(path, '/') == NULL) ) {
+ // POSIX says you can call dlopen() with a leaf name (e.g. dlopen("libz.dylb"))
+ char fallbackPath[PATH_MAX];
+ strcpy(fallbackPath, "/usr/lib/");
+ strlcat(fallbackPath, path, PATH_MAX);
+ result = sAllCacheImagesProxy->dlopenFromCache(gLinkContext, fallbackPath, mode, handle);
+ }
+ return result;
+}
+
+bool makeCacheHandle(ImageLoader* image, unsigned cacheIndex, int mode, void** result)
+{
+ if ( sAllCacheImagesProxy == NULL )
+ return false;
+ return sAllCacheImagesProxy->makeCacheHandle(gLinkContext, cacheIndex, mode, result);
+}
+
+bool isCacheHandle(void* handle)
+{
+ if ( sAllCacheImagesProxy == NULL )
+ return false;
+ return sAllCacheImagesProxy->isCacheHandle(handle, NULL, NULL);
+}
+
+bool isPathInCache(const char* path)
+{
+ if ( sAllCacheImagesProxy == NULL )
+ return false;
+ unsigned index;
+ return sAllCacheImagesProxy->hasDylib(path, &index);
+}
+
+const char* getPathFromIndex(unsigned cacheIndex)
+{
+ if ( sAllCacheImagesProxy == NULL )
+ return NULL;
+ return sAllCacheImagesProxy->getIndexedPath(cacheIndex);
+}
+
+void* dlsymFromCache(void* handle, const char* symName, unsigned index)
+{
+ if ( sAllCacheImagesProxy == NULL )
+ return NULL;
+ return sAllCacheImagesProxy->dlsymFromCache(gLinkContext, handle, symName, index);
+}
+
+bool addressInCache(const void* address, const mach_header** mh, const char** path, unsigned* index)
+{
+ if ( sAllCacheImagesProxy == NULL )
+ return false;
+ unsigned ignore;
+ return sAllCacheImagesProxy->addressInCache(address, mh, path, index ? index : &ignore);
+}
+
+bool findUnwindSections(const void* addr, dyld_unwind_sections* info)
+{
+ if ( sAllCacheImagesProxy == NULL )
+ return false;
+ return sAllCacheImagesProxy->findUnwindSections(addr, info);
+}
+
+bool dladdrFromCache(const void* address, Dl_info* info)
+{
+ if ( sAllCacheImagesProxy == NULL )
+ return false;
+ return sAllCacheImagesProxy->dladdrFromCache(address, info);
+}
+#endif
+
+static ImageLoader* libraryLocator(const char* libraryName, bool search, const char* origin, const ImageLoader::RPathChain* rpaths, unsigned& cacheIndex)
{
dyld::LoadContext context;
context.useSearchPaths = search;
+ context.useFallbackPaths = search;
context.useLdLibraryPath = false;
context.implicitRPath = false;
context.matchByInstallName = false;
context.dontLoad = false;
context.mustBeBundle = false;
context.mustBeDylib = true;
- context.findDLL = findDLL;
+ context.canBePIE = false;
context.origin = origin;
context.rpath = rpaths;
- return load(libraryName, context);
+ return load(libraryName, context, cacheIndex);
}
static const char* basename(const char* path)
@@ -2588,17 +4875,14 @@
return last;
}
-static void setContext(const struct mach_header* mainExecutableMH, int argc, const char* argv[], const char* envp[], const char* apple[])
+static void setContext(const macho_header* mainExecutableMH, int argc, const char* argv[], const char* envp[], const char* apple[])
{
gLinkContext.loadLibrary = &libraryLocator;
gLinkContext.terminationRecorder = &terminationRecorder;
gLinkContext.flatExportFinder = &flatFindExportedSymbol;
gLinkContext.coalescedExportFinder = &findCoalescedExportedSymbol;
+ gLinkContext.getCoalescedImages = &getCoalescedImages;
gLinkContext.undefinedHandler = &undefinedHandler;
-#if IMAGE_NOTIFY_SUPPORT
- gLinkContext.addImageNeedingNotification = &addImageNeedingNotification;
- gLinkContext.notifyAdding = ¬ifyAdding;
-#endif
gLinkContext.getAllMappedRegions = &getMappedRegions;
gLinkContext.bindingHandler = NULL;
gLinkContext.notifySingle = ¬ifySingle;
@@ -2606,14 +4890,22 @@
gLinkContext.removeImage = &removeImage;
gLinkContext.registerDOFs = ®isterDOFs;
gLinkContext.clearAllDepths = &clearAllDepths;
+ gLinkContext.printAllDepths = &printAllDepths;
gLinkContext.imageCount = &imageCount;
- gLinkContext.notifySharedCacheInvalid= ¬ifySharedCacheInvalid;
-#if __i386__
- gLinkContext.makeSharedCacheImportSegmentsWritable = &makeSharedCacheImportSegmentsWritable;
-#endif
gLinkContext.setNewProgramVars = &setNewProgramVars;
+#if DYLD_SHARED_CACHE_SUPPORT
+ gLinkContext.inSharedCache = &inSharedCache;
+#endif
+ gLinkContext.setErrorStrings = &setErrorStrings;
#if SUPPORT_OLD_CRT_INITIALIZATION
gLinkContext.setRunInitialzersOldWay= &setRunInitialzersOldWay;
+#endif
+ gLinkContext.findImageContainingAddress = &findImageContainingAddress;
+ gLinkContext.addDynamicReference = &addDynamicReference;
+#if SUPPORT_ACCELERATE_TABLES
+ gLinkContext.notifySingleFromCache = ¬ifySingleFromCache;
+ gLinkContext.getPreInitNotifyHandler= &getPreInitNotifyHandler;
+ gLinkContext.getBoundBatchHandler = &getBoundBatchHandler;
#endif
gLinkContext.bindingOptions = ImageLoader::kBindingNone;
gLinkContext.argc = argc;
@@ -2628,24 +4920,155 @@
gLinkContext.programVars.__prognamePtr=&gLinkContext.progname;
gLinkContext.mainExecutable = NULL;
gLinkContext.imageSuffix = NULL;
+ gLinkContext.dynamicInterposeArray = NULL;
+ gLinkContext.dynamicInterposeCount = 0;
gLinkContext.prebindUsage = ImageLoader::kUseAllPrebinding;
+#if TARGET_IPHONE_SIMULATOR
+ gLinkContext.sharedRegionMode = ImageLoader::kDontUseSharedRegion;
+#else
gLinkContext.sharedRegionMode = ImageLoader::kUseSharedRegion;
-}
-
-#if __ppc__ || __i386__
-bool isRosetta()
-{
- int mib[] = { CTL_KERN, KERN_CLASSIC, getpid() };
- int is_classic = 0;
- size_t len = sizeof(int);
- int ret = sysctl(mib, 3, &is_classic, &len, NULL, 0);
- if ((ret != -1) && is_classic) {
- // we're running under Rosetta
- return true;
- }
+#endif
+}
+
+
+
+//
+// Look for a special segment in the mach header.
+// Its presences means that the binary wants to have DYLD ignore
+// DYLD_ environment variables.
+//
+static bool hasRestrictedSegment(const macho_header* mh)
+{
+ const uint32_t cmd_count = mh->ncmds;
+ const struct load_command* const cmds = (struct load_command*)(((char*)mh)+sizeof(macho_header));
+ const struct load_command* cmd = cmds;
+ for (uint32_t i = 0; i < cmd_count; ++i) {
+ switch (cmd->cmd) {
+ case LC_SEGMENT_COMMAND:
+ {
+ const struct macho_segment_command* seg = (struct macho_segment_command*)cmd;
+
+ //dyld::log("seg name: %s\n", seg->segname);
+ if (strcmp(seg->segname, "__RESTRICT") == 0) {
+ const struct macho_section* const sectionsStart = (struct macho_section*)((char*)seg + sizeof(struct macho_segment_command));
+ const struct macho_section* const sectionsEnd = §ionsStart[seg->nsects];
+ for (const struct macho_section* sect=sectionsStart; sect < sectionsEnd; ++sect) {
+ if (strcmp(sect->sectname, "__restrict") == 0)
+ return true;
+ }
+ }
+ }
+ break;
+ }
+ cmd = (const struct load_command*)(((char*)cmd)+cmd->cmdsize);
+ }
+
return false;
}
-#endif
+
+#if __IPHONE_OS_VERSION_MIN_REQUIRED
+static bool isFairPlayEncrypted(const macho_header* mh)
+{
+ const uint32_t cmd_count = mh->ncmds;
+ const struct load_command* const cmds = (struct load_command*)(((char*)mh)+sizeof(macho_header));
+ const struct load_command* cmd = cmds;
+ for (uint32_t i = 0; i < cmd_count; ++i) {
+ if ( cmd->cmd == LC_ENCRYPT_COMMAND ) {
+ const encryption_info_command* enc = (encryption_info_command*)cmd;
+ return (enc->cryptid != 0);
+ }
+ cmd = (const struct load_command*)(((char*)cmd)+cmd->cmdsize);
+ }
+
+ return false;
+}
+#endif
+
+#if SUPPORT_VERSIONED_PATHS
+
+static bool readFirstPage(const char* dylibPath, uint8_t firstPage[4096])
+{
+ firstPage[0] = 0;
+ // open file (automagically closed when this function exits)
+ FileOpener file(dylibPath);
+
+ if ( file.getFileDescriptor() == -1 )
+ return false;
+
+ if ( pread(file.getFileDescriptor(), firstPage, 4096, 0) != 4096 )
+ return false;
+
+ // if fat wrapper, find usable sub-file
+ const fat_header* fileStartAsFat = (fat_header*)firstPage;
+ if ( fileStartAsFat->magic == OSSwapBigToHostInt32(FAT_MAGIC) ) {
+ uint64_t fileOffset;
+ uint64_t fileLength;
+ if ( fatFindBest(fileStartAsFat, &fileOffset, &fileLength) ) {
+ if ( pread(file.getFileDescriptor(), firstPage, 4096, fileOffset) != 4096 )
+ return false;
+ }
+ else {
+ return false;
+ }
+ }
+
+ return true;
+}
+
+//
+// Peeks at a dylib file and returns its current_version and install_name.
+// Returns false on error.
+//
+static bool getDylibVersionAndInstallname(const char* dylibPath, uint32_t* version, char* installName)
+{
+ uint8_t firstPage[4096];
+ const macho_header* mh = (macho_header*)firstPage;
+ if ( !readFirstPage(dylibPath, firstPage) ) {
+ #if DYLD_SHARED_CACHE_SUPPORT
+ // If file cannot be read, check to see if path is in shared cache
+ const macho_header* mhInCache;
+ const char* pathInCache;
+ long slideInCache;
+ if ( !findInSharedCacheImage(dylibPath, true, NULL, &mhInCache, &pathInCache, &slideInCache) )
+ return false;
+ mh = mhInCache;
+ #else
+ return false;
+ #endif
+ }
+
+ // check mach-o header
+ if ( mh->magic != sMainExecutableMachHeader->magic )
+ return false;
+ if ( mh->cputype != sMainExecutableMachHeader->cputype )
+ return false;
+
+ // scan load commands for LC_ID_DYLIB
+ const uint32_t cmd_count = mh->ncmds;
+ const struct load_command* const cmds = (struct load_command*)(((char*)mh)+sizeof(macho_header));
+ const struct load_command* const cmdsReadEnd = (struct load_command*)(((char*)mh)+4096);
+ const struct load_command* cmd = cmds;
+ for (uint32_t i = 0; i < cmd_count; ++i) {
+ switch (cmd->cmd) {
+ case LC_ID_DYLIB:
+ {
+ const struct dylib_command* id = (struct dylib_command*)cmd;
+ *version = id->dylib.current_version;
+ if ( installName != NULL )
+ strlcpy(installName, (char *)id + id->dylib.name.offset, PATH_MAX);
+ return true;
+ }
+ break;
+ }
+ cmd = (const struct load_command*)(((char*)cmd)+cmd->cmdsize);
+ if ( cmd > cmdsReadEnd )
+ return false;
+ }
+
+ return false;
+}
+#endif // SUPPORT_VERSIONED_PATHS
+
#if 0
static void printAllImages()
@@ -2654,14 +5077,13 @@
for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
ImageLoader* image = *it;
dyld_image_states imageState = image->getState();
- dyld::log(" state=%d, refcount=%d, name=%s\n", imageState, image->referenceCount(), image->getShortName());
- image->printReferenceCounts();
- }
-}
-#endif
-
-
-void link(ImageLoader* image, bool forceLazysBound, const ImageLoader::RPathChain& loaderRPaths)
+ dyld::log(" state=%d, dlopen-count=%d, never-unload=%d, in-use=%d, name=%s\n",
+ imageState, image->dlopenCount(), image->neverUnload(), image->isMarkedInUse(), image->getShortName());
+ }
+}
+#endif
+
+void link(ImageLoader* image, bool forceLazysBound, bool neverUnload, const ImageLoader::RPathChain& loaderRPaths, unsigned cacheIndex)
{
// add to list of known images. This did not happen at creation time for bundles
if ( image->isBundle() && !image->isLinked() )
@@ -2671,61 +5093,139 @@
if ( !image->isLinked() )
addRootImage(image);
- // notify ZeroLink of new image with concat of logical and physical name
- if ( sBundleNotifier != NULL && image->isBundle() ) {
- const int logicalLen = strlen(image->getLogicalPath());
- char logAndPhys[strlen(image->getPath())+logicalLen+2];
- strcpy(logAndPhys, image->getLogicalPath());
- strcpy(&logAndPhys[logicalLen+1], image->getPath());
- (*sBundleNotifier)(logAndPhys, image);
- }
-
// process images
try {
- image->link(gLinkContext, forceLazysBound, false, loaderRPaths);
+ const char* path = image->getPath();
+#if SUPPORT_ACCELERATE_TABLES
+ if ( image == sAllCacheImagesProxy )
+ path = sAllCacheImagesProxy->getIndexedPath(cacheIndex);
+#endif
+ image->link(gLinkContext, forceLazysBound, false, neverUnload, loaderRPaths, path);
}
catch (const char* msg) {
garbageCollectImages();
throw;
}
-
-#if OLD_GDB_DYLD_INTERFACE
- // notify gdb that loaded libraries have changed
- gdb_dyld_state_changed();
-#endif
}
void runInitializers(ImageLoader* image)
{
// do bottom up initialization
- image->runInitializers(gLinkContext);
-}
-
+ ImageLoader::InitializerTimingList initializerTimes[allImagesCount()];
+ initializerTimes[0].count = 0;
+ image->runInitializers(gLinkContext, initializerTimes[0]);
+}
+
+// This function is called at the end of dlclose() when the reference count goes to zero.
+// The dylib being unloaded may have brought in other dependent dylibs when it was loaded.
+// Those dependent dylibs need to be unloaded, but only if they are not referenced by
+// something else. We use a standard mark and sweep garbage collection.
+//
+// The tricky part is that when a dylib is unloaded it may have a termination function that
+// can run and itself call dlclose() on yet another dylib. The problem is that this
+// sort of gabage collection is not re-entrant. Instead a terminator's call to dlclose()
+// which calls garbageCollectImages() will just set a flag to re-do the garbage collection
+// when the current pass is done.
+//
+// Also note that this is done within the dyld global lock, so it is always single threaded.
+//
void garbageCollectImages()
{
- // keep scanning list of images until entire list is scanned with no unreferenced images
- bool mightBeUnreferencedImages = true;
- while ( mightBeUnreferencedImages ) {
- mightBeUnreferencedImages = false;
+ static bool sDoingGC = false;
+ static bool sRedo = false;
+
+ if ( sDoingGC ) {
+ // GC is currently being run, just set a flag to have it run again.
+ sRedo = true;
+ return;
+ }
+
+ sDoingGC = true;
+ do {
+ sRedo = false;
+
+ // mark phase: mark all images not-in-use
for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
ImageLoader* image = *it;
- if ( (image->referenceCount() == 0) && !image->neverUnload() && !image->isBeingRemoved() ) {
- try {
- //dyld::log("garbageCollectImages: deleting %s\n", image->getPath());
- image->setBeingRemoved();
- removeImage(image);
- delete image;
+ //dyld::log("gc: neverUnload=%d name=%s\n", image->neverUnload(), image->getShortName());
+ image->markNotUsed();
+ }
+
+ // sweep phase: mark as in-use, images reachable from never-unload or in-use image
+ for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
+ ImageLoader* image = *it;
+ if ( (image->dlopenCount() != 0) || image->neverUnload() || (image == sMainExecutable) ) {
+ OSSpinLockLock(&sDynamicReferencesLock);
+ image->markedUsedRecursive(sDynamicReferences);
+ OSSpinLockUnlock(&sDynamicReferencesLock);
+ }
+ }
+
+ // collect phase: build array of images not marked in-use
+ ImageLoader* deadImages[sAllImages.size()];
+ unsigned deadCount = 0;
+ int maxRangeCount = 0;
+ for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
+ ImageLoader* image = *it;
+ if ( ! image->isMarkedInUse() ) {
+ deadImages[deadCount++] = image;
+ if (gLogAPIs) dyld::log("dlclose(), found unused image %p %s\n", image, image->getShortName());
+ maxRangeCount += image->segmentCount();
+ }
+ }
+
+ // collect phase: run termination routines for images not marked in-use
+ __cxa_range_t ranges[maxRangeCount];
+ int rangeCount = 0;
+ for (unsigned i=0; i < deadCount; ++i) {
+ ImageLoader* image = deadImages[i];
+ for (unsigned int j=0; j < image->segmentCount(); ++j) {
+ if ( !image->segExecutable(j) )
+ continue;
+ if ( rangeCount < maxRangeCount ) {
+ ranges[rangeCount].addr = (const void*)image->segActualLoadAddress(j);
+ ranges[rangeCount].length = image->segSize(j);
+ ++rangeCount;
}
- catch (const char* msg) {
- dyld::warn("problem deleting image: %s\n", msg);
+ }
+ try {
+ runImageStaticTerminators(image);
+ }
+ catch (const char* msg) {
+ dyld::warn("problem running terminators for image: %s\n", msg);
+ }
+ }
+
+ // <rdar://problem/14718598> dyld should call __cxa_finalize_ranges()
+ if ( (rangeCount > 0) && (gLibSystemHelpers != NULL) && (gLibSystemHelpers->version >= 13) )
+ (*gLibSystemHelpers->cxa_finalize_ranges)(ranges, rangeCount);
+
+ // collect phase: delete all images which are not marked in-use
+ bool mightBeMore;
+ do {
+ mightBeMore = false;
+ for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
+ ImageLoader* image = *it;
+ if ( ! image->isMarkedInUse() ) {
+ try {
+ if (gLogAPIs) dyld::log("dlclose(), deleting %p %s\n", image, image->getShortName());
+ removeImage(image);
+ ImageLoader::deleteImage(image);
+ mightBeMore = true;
+ break; // interator in invalidated by this removal
+ }
+ catch (const char* msg) {
+ dyld::warn("problem deleting image: %s\n", msg);
+ }
}
- mightBeUnreferencedImages = true;
- break;
- }
- }
- }
+ }
+ } while ( mightBeMore );
+ } while (sRedo);
+ sDoingGC = false;
+
//printAllImages();
+
}
@@ -2733,19 +5233,24 @@
{
if ( image->isBundle() ) {
removeImageFromAllImages(image->machHeader());
- delete image;
+ ImageLoader::deleteImage(image);
}
sBundleBeingLoaded = NULL;
dyld::garbageCollectImages();
}
-void preflight(ImageLoader* image, const ImageLoader::RPathChain& loaderRPaths)
+void preflight(ImageLoader* image, const ImageLoader::RPathChain& loaderRPaths, unsigned cacheIndex)
{
try {
if ( image->isBundle() )
sBundleBeingLoaded = image; // hack
- image->link(gLinkContext, false, true, loaderRPaths);
+ const char* path = image->getPath();
+#if SUPPORT_ACCELERATE_TABLES
+ if ( image == sAllCacheImagesProxy )
+ path = sAllCacheImagesProxy->getIndexedPath(cacheIndex);
+#endif
+ image->link(gLinkContext, false, true, false, loaderRPaths, path);
}
catch (const char* msg) {
preflight_finally(image);
@@ -2757,25 +5262,439 @@
static void loadInsertedDylib(const char* path)
{
ImageLoader* image = NULL;
+ unsigned cacheIndex;
try {
LoadContext context;
context.useSearchPaths = false;
+ context.useFallbackPaths = false;
context.useLdLibraryPath = false;
context.implicitRPath = false;
context.matchByInstallName = false;
context.dontLoad = false;
context.mustBeBundle = false;
context.mustBeDylib = true;
- context.findDLL = false;
+ context.canBePIE = false;
context.origin = NULL; // can't use @loader_path with DYLD_INSERT_LIBRARIES
context.rpath = NULL;
- image = load(path, context);
- image->setNeverUnload();
+ image = load(path, context, cacheIndex);
+ }
+ catch (const char* msg) {
+#if TARGET_IPHONE_SIMULATOR
+ dyld::log("dyld: warning: could not load inserted library '%s' because %s\n", path, msg);
+#else
+#if __MAC_OS_X_VERSION_MIN_REQUIRED
+ if ( gLinkContext.processUsingLibraryValidation )
+ dyld::log("dyld: warning: could not load inserted library '%s' into library validated process because %s\n", path, msg);
+ else
+#endif
+ halt(dyld::mkstringf("could not load inserted library '%s' because %s\n", path, msg));
+#endif
}
catch (...) {
- halt(dyld::mkstringf("could not load inserted library: %s\n", path));
- }
-}
+ halt(dyld::mkstringf("could not load inserted library '%s'\n", path));
+ }
+}
+
+
+//
+// Sets:
+// sEnvMode
+// gLinkContext.requireCodeSignature
+// gLinkContext.processIsRestricted // Mac OS X only
+// gLinkContext.processUsingLibraryValidation // Mac OS X only
+//
+static void configureProcessRestrictions(const macho_header* mainExecutableMH)
+{
+ uint32_t flags;
+#if TARGET_IPHONE_SIMULATOR
+ sEnvMode = envAll;
+ gLinkContext.requireCodeSignature = true;
+#elif __IPHONE_OS_VERSION_MIN_REQUIRED
+ sEnvMode = envNone;
+ gLinkContext.requireCodeSignature = true;
+ if ( csops(0, CS_OPS_STATUS, &flags, sizeof(flags)) != -1 ) {
+ if ( flags & CS_ENFORCEMENT ) {
+ if ( flags & CS_GET_TASK_ALLOW ) {
+ // Xcode built app for Debug allowed to use DYLD_* variables
+ sEnvMode = envAll;
+ }
+ else {
+ // Development kernel can use DYLD_PRINT_* variables on any FairPlay encrypted app
+ uint32_t secureValue = 0;
+ size_t secureValueSize = sizeof(secureValue);
+ if ( (sysctlbyname("kern.secure_kernel", &secureValue, &secureValueSize, NULL, 0) == 0) && (secureValue == 0) && isFairPlayEncrypted(mainExecutableMH) ) {
+ sEnvMode = envPrintOnly;
+ }
+ }
+ }
+ else {
+ // Development kernel can run unsigned code
+ sEnvMode = envAll;
+ gLinkContext.requireCodeSignature = false;
+ }
+ }
+ if ( issetugid() ) {
+ sEnvMode = envNone;
+ }
+#elif __MAC_OS_X_VERSION_MIN_REQUIRED
+ sEnvMode = envAll;
+ gLinkContext.requireCodeSignature = false;
+ gLinkContext.processIsRestricted = false;
+ gLinkContext.processUsingLibraryValidation = false;
+ // any processes with setuid or setgid bit set or with __RESTRICT segment is restricted
+ if ( issetugid() || hasRestrictedSegment(mainExecutableMH) ) {
+ gLinkContext.processIsRestricted = true;
+ }
+ if ( csops(0, CS_OPS_STATUS, &flags, sizeof(flags)) != -1 ) {
+ // On OS X CS_RESTRICT means the program was signed with entitlements
+ if ( ((flags & CS_RESTRICT) == CS_RESTRICT) && (csr_check(CSR_ALLOW_TASK_FOR_PID) != 0) ) {
+ gLinkContext.processIsRestricted = true;
+ }
+ // Library Validation loosens searching but requires everything to be code signed
+ if ( flags & CS_REQUIRE_LV ) {
+ gLinkContext.processIsRestricted = false;
+ //gLinkContext.requireCodeSignature = true;
+ gLinkContext.processUsingLibraryValidation = true;
+ }
+ }
+#endif
+}
+
+
+bool processIsRestricted()
+{
+#if __MAC_OS_X_VERSION_MIN_REQUIRED
+ return gLinkContext.processIsRestricted;
+#else
+ return false;
+#endif
+}
+
+
+// <rdar://problem/10583252> Add dyld to uuidArray to enable symbolication of stackshots
+static void addDyldImageToUUIDList()
+{
+ const struct macho_header* mh = (macho_header*)&__dso_handle;
+ const uint32_t cmd_count = mh->ncmds;
+ const struct load_command* const cmds = (struct load_command*)((char*)mh + sizeof(macho_header));
+ const struct load_command* cmd = cmds;
+ for (uint32_t i = 0; i < cmd_count; ++i) {
+ switch (cmd->cmd) {
+ case LC_UUID: {
+ uuid_command* uc = (uuid_command*)cmd;
+ dyld_uuid_info info;
+ info.imageLoadAddress = (mach_header*)mh;
+ memcpy(info.imageUUID, uc->uuid, 16);
+ addNonSharedCacheImageUUID(info);
+ return;
+ }
+ }
+ cmd = (const struct load_command*)(((char*)cmd)+cmd->cmdsize);
+ }
+}
+
+void notifyKernelAboutDyld()
+{
+ const struct macho_header* mh = (macho_header*)&__dso_handle;
+ const uint32_t cmd_count = mh->ncmds;
+ const struct load_command* const cmds = (struct load_command*)((char*)mh + sizeof(macho_header));
+ const struct load_command* cmd = cmds;
+ for (uint32_t i = 0; i < cmd_count; ++i) {
+ switch (cmd->cmd) {
+ case LC_UUID: {
+ // Add dyld to the kernel image info
+ uuid_command* uc = (uuid_command*)cmd;
+ dyld_kernel_image_info_t kernelInfo;
+ memcpy(kernelInfo.uuid, uc->uuid, 16);
+ kernelInfo.load_addr = (uint64_t)mh;
+ kernelInfo.fsobjid.fid_objno = 0;
+ kernelInfo.fsobjid.fid_generation = 0;
+ kernelInfo.fsid.val[0] = 0;
+ kernelInfo.fsid.val[1] = 0;
+ task_register_dyld_image_infos(mach_task_self(), &kernelInfo, 1);
+ return;
+ }
+ }
+ cmd = (const struct load_command*)(((char*)cmd)+cmd->cmdsize);
+ }
+}
+
+#if __MAC_OS_X_VERSION_MIN_REQUIRED
+typedef int (*open_proc_t)(const char*, int, int);
+typedef int (*fcntl_proc_t)(int, int, void*);
+typedef int (*ioctl_proc_t)(int, unsigned long, void*);
+static void* getProcessInfo() { return dyld::gProcessInfo; }
+static SyscallHelpers sSysCalls = {
+ 7,
+ // added in version 1
+ (open_proc_t)&open,
+ &close,
+ &pread,
+ &write,
+ &mmap,
+ &munmap,
+ &madvise,
+ &stat,
+ (fcntl_proc_t)&fcntl,
+ (ioctl_proc_t)&ioctl,
+ &issetugid,
+ &getcwd,
+ &realpath,
+ &vm_allocate,
+ &vm_deallocate,
+ &vm_protect,
+ &vlog,
+ &vwarn,
+ &pthread_mutex_lock,
+ &pthread_mutex_unlock,
+ &mach_thread_self,
+ &mach_port_deallocate,
+ &task_self_trap,
+ &mach_timebase_info,
+ &OSAtomicCompareAndSwapPtrBarrier,
+ &OSMemoryBarrier,
+ &getProcessInfo,
+ &__error,
+ &mach_absolute_time,
+ // added in version 2
+ &thread_switch,
+ // added in version 3
+ &opendir,
+ &readdir_r,
+ &closedir,
+ // added in version 4
+ &coresymbolication_load_notifier,
+ &coresymbolication_unload_notifier,
+ // Added in version 5
+ &proc_regionfilename,
+ &getpid,
+ &mach_port_insert_right,
+ &mach_port_allocate,
+ &mach_msg,
+ // Added in version 6
+ &abort_with_payload,
+ // Added in version 7
+ &task_register_dyld_image_infos,
+ &task_unregister_dyld_image_infos,
+ &task_get_dyld_image_infos,
+ &task_register_dyld_shared_cache_image_info,
+ &task_register_dyld_set_dyld_state,
+ &task_register_dyld_get_process_state
+};
+
+__attribute__((noinline))
+static const char* useSimulatorDyld(int fd, const macho_header* mainExecutableMH, const char* dyldPath,
+ int argc, const char* argv[], const char* envp[], const char* apple[],
+ uintptr_t* startGlue, uintptr_t* mainAddr)
+{
+ *startGlue = 0;
+ *mainAddr = 0;
+
+ // <rdar://problem/25311921> simulator does not support restricted processes
+ uint32_t flags;
+ if ( csops(0, CS_OPS_STATUS, &flags, sizeof(flags)) == -1 )
+ return "csops() failed";
+ if ( (flags & CS_RESTRICT) == CS_RESTRICT )
+ return "dyld_sim cannot be loaded in a restricted process";
+ if ( issetugid() )
+ return "dyld_sim cannot be loaded in a setuid process";
+ if ( hasRestrictedSegment(mainExecutableMH) )
+ return "dyld_sim cannot be loaded in a restricted process";
+
+ // get file size of dyld_sim
+ struct stat sb;
+ if ( fstat(fd, &sb) == -1 )
+ return "stat(dyld_sim) failed";
+
+ // read first page of dyld_sim file
+ uint8_t firstPage[4096];
+ if ( pread(fd, firstPage, 4096, 0) != 4096 )
+ return "pread(dyld_sim) failed";
+
+ // if fat file, pick matching slice
+ uint64_t fileOffset = 0;
+ uint64_t fileLength = sb.st_size;
+ const fat_header* fileStartAsFat = (fat_header*)firstPage;
+ if ( fileStartAsFat->magic == OSSwapBigToHostInt32(FAT_MAGIC) ) {
+ if ( !fatFindBest(fileStartAsFat, &fileOffset, &fileLength) )
+ return "no matching arch in dyld_sim";
+ // re-read buffer from start of mach-o slice in fat file
+ if ( pread(fd, firstPage, 4096, fileOffset) != 4096 )
+ return "pread(dyld_sim) failed";
+ }
+ else if ( !isCompatibleMachO(firstPage, dyldPath) ) {
+ return "dyld_sim not compatible mach-o";
+ }
+
+ // calculate total size of dyld segments
+ const macho_header* mh = (const macho_header*)firstPage;
+ struct macho_segment_command* lastSeg = NULL;
+ struct macho_segment_command* firstSeg = NULL;
+ uintptr_t mappingSize = 0;
+ uintptr_t preferredLoadAddress = 0;
+ const uint32_t cmd_count = mh->ncmds;
+ if ( mh->sizeofcmds > 4096 )
+ return "dyld_sim load commands to large";
+ if ( (sizeof(macho_header) + mh->sizeofcmds) > 4096 )
+ return "dyld_sim load commands to large";
+ const struct load_command* const cmds = (struct load_command*)(((char*)mh)+sizeof(macho_header));
+ const struct load_command* const endCmds = (struct load_command*)(((char*)mh) + sizeof(macho_header) + mh->sizeofcmds);
+ const struct load_command* cmd = cmds;
+ for (uint32_t i = 0; i < cmd_count; ++i) {
+ uint32_t cmdLength = cmd->cmdsize;
+ if ( cmdLength < 8 )
+ return "dyld_sim load command too small";
+ const struct load_command* const nextCmd = (const struct load_command*)(((char*)cmd)+cmdLength);
+ if ( (nextCmd > endCmds) || (nextCmd < cmd) )
+ return "dyld_sim load command too large";
+ switch (cmd->cmd) {
+ case LC_SEGMENT_COMMAND:
+ {
+ struct macho_segment_command* seg = (struct macho_segment_command*)cmd;
+ if ( seg->vmaddr + seg->vmsize < seg->vmaddr )
+ return "dyld_sim seg wraps address space";
+ if ( seg->vmsize < seg->filesize )
+ return "dyld_sim seg vmsize too small";
+ if ( (seg->fileoff + seg->filesize) < seg->fileoff )
+ return "dyld_sim seg size wraps address space";
+ if ( lastSeg == NULL ) {
+ // first segment must be __TEXT and start at beginning of file/slice
+ firstSeg = seg;
+ if ( strcmp(seg->segname, "__TEXT") != 0 )
+ return "dyld_sim first segment not __TEXT";
+ if ( seg->fileoff != 0 )
+ return "dyld_sim first segment not at file offset zero";
+ if ( seg->filesize < (sizeof(macho_header) + mh->sizeofcmds) )
+ return "dyld_sim first segment smaller than load commands";
+ preferredLoadAddress = seg->vmaddr;
+ }
+ else {
+ // other sements must be continguous with previous segment and not executable
+ if ( lastSeg->fileoff + lastSeg->filesize != seg->fileoff )
+ return "dyld_sim segments not contiguous";
+ if ( lastSeg->vmaddr + lastSeg->vmsize != seg->vmaddr )
+ return "dyld_sim segments not address contiguous";
+ if ( (seg->initprot & VM_PROT_EXECUTE) != 0 )
+ return "dyld_sim non-first segment is executable";
+ }
+ mappingSize += seg->vmsize;
+ lastSeg = seg;
+ }
+ break;
+ case LC_SEGMENT_COMMAND_WRONG:
+ return "dyld_sim wrong load segment load command";
+ }
+ cmd = nextCmd;
+ }
+ // last segment must be named __LINKEDIT and not writable
+ if ( strcmp(lastSeg->segname, "__LINKEDIT") != 0 )
+ return "dyld_sim last segment not __LINKEDIT";
+ if ( lastSeg->initprot & VM_PROT_WRITE )
+ return "dyld_sim __LINKEDIT segment writable";
+
+ // reserve space, then mmap each segment
+ vm_address_t loadAddress = 0;
+ if ( ::vm_allocate(mach_task_self(), &loadAddress, mappingSize, VM_FLAGS_ANYWHERE) != 0 )
+ return "dyld_sim cannot allocate space";
+ cmd = cmds;
+ struct linkedit_data_command* codeSigCmd = NULL;
+ struct source_version_command* dyldVersionCmd = NULL;
+ for (uint32_t i = 0; i < cmd_count; ++i) {
+ switch (cmd->cmd) {
+ case LC_SEGMENT_COMMAND:
+ {
+ struct macho_segment_command* seg = (struct macho_segment_command*)cmd;
+ uintptr_t requestedLoadAddress = seg->vmaddr - preferredLoadAddress + loadAddress;
+ void* segAddress = ::mmap((void*)requestedLoadAddress, seg->filesize, seg->initprot, MAP_FIXED | MAP_PRIVATE, fd, fileOffset + seg->fileoff);
+ //dyld::log("dyld_sim %s mapped at %p\n", seg->segname, segAddress);
+ if ( segAddress == (void*)(-1) )
+ return "dyld_sim mmap() of segment failed";
+ if ( ((uintptr_t)segAddress < loadAddress) || ((uintptr_t)segAddress+seg->filesize > loadAddress+mappingSize) )
+ return "dyld_sim mmap() to wrong location";
+ }
+ break;
+ case LC_CODE_SIGNATURE:
+ codeSigCmd = (struct linkedit_data_command*)cmd;
+ break;
+ case LC_SOURCE_VERSION:
+ dyldVersionCmd = (struct source_version_command*)cmd;
+ break;
+ }
+ cmd = (const struct load_command*)(((char*)cmd)+cmd->cmdsize);
+ }
+
+ // must have code signature which is contained within LINKEDIT segment
+ if ( codeSigCmd == NULL )
+ return "dyld_sim not code signed";
+ if ( codeSigCmd->dataoff < lastSeg->fileoff )
+ return "dyld_sim code signature not in __LINKEDIT";
+ if ( (codeSigCmd->dataoff + codeSigCmd->datasize) < codeSigCmd->dataoff )
+ return "dyld_sim code signature size wraps";
+ if ( (codeSigCmd->dataoff + codeSigCmd->datasize) > (lastSeg->fileoff + lastSeg->filesize) )
+ return "dyld_sim code signature extends beyond __LINKEDIT";
+
+ fsignatures_t siginfo;
+ siginfo.fs_file_start=fileOffset; // start of mach-o slice in fat file
+ siginfo.fs_blob_start=(void*)(long)(codeSigCmd->dataoff); // start of code-signature in mach-o file
+ siginfo.fs_blob_size=codeSigCmd->datasize; // size of code-signature
+ int result = fcntl(fd, F_ADDFILESIGS_FOR_DYLD_SIM, &siginfo);
+ if ( result == -1 ) {
+ return mkstringf("dyld_sim fcntl(F_ADDFILESIGS_FOR_DYLD_SIM) failed with errno=%d", errno);
+ }
+ close(fd);
+ // file range covered by code signature must extend up to code signature itself
+ if ( siginfo.fs_file_start < codeSigCmd->dataoff )
+ return mkstringf("dyld_sim code signature does not cover all of dyld_sim. Signature covers up to 0x%08lX. Signature starts at 0x%08X", (unsigned long)siginfo.fs_file_start, codeSigCmd->dataoff);
+
+
+ // walk newly mapped dyld_sim __TEXT load commands to find entry point
+ uintptr_t entry = 0;
+ cmd = (struct load_command*)(((char*)loadAddress)+sizeof(macho_header));
+ const uint32_t count = ((macho_header*)(loadAddress))->ncmds;
+ for (uint32_t i = 0; i < count; ++i) {
+ if (cmd->cmd == LC_UNIXTHREAD) {
+ #if __i386__
+ const i386_thread_state_t* registers = (i386_thread_state_t*)(((char*)cmd) + 16);
+ // entry point must be in first segment
+ if ( registers->__eip < firstSeg->vmaddr )
+ return "dyld_sim entry point not in __TEXT segment";
+ if ( registers->__eip > (firstSeg->vmaddr + firstSeg->vmsize) )
+ return "dyld_sim entry point not in __TEXT segment";
+ entry = (registers->__eip + loadAddress - preferredLoadAddress);
+ #elif __x86_64__
+ const x86_thread_state64_t* registers = (x86_thread_state64_t*)(((char*)cmd) + 16);
+ // entry point must be in first segment
+ if ( registers->__rip < firstSeg->vmaddr )
+ return "dyld_sim entry point not in __TEXT segment";
+ if ( registers->__rip > (firstSeg->vmaddr + firstSeg->vmsize) )
+ return "dyld_sim entry point not in __TEXT segment";
+ entry = (registers->__rip + loadAddress - preferredLoadAddress);
+ #endif
+ }
+ cmd = (const struct load_command*)(((char*)cmd)+cmd->cmdsize);
+ }
+
+ // notify debugger that dyld_sim is loaded
+ dyld_image_info info;
+ info.imageLoadAddress = (mach_header*)loadAddress;
+ info.imageFilePath = strdup(dyldPath);
+ info.imageFileModDate = sb.st_mtime;
+ addImagesToAllImages(1, &info);
+ dyld::gProcessInfo->notification(dyld_image_adding, 1, &info);
+
+ const char** appleParams = apple;
+ // jump into new simulator dyld
+ typedef uintptr_t (*sim_entry_proc_t)(int argc, const char* argv[], const char* envp[], const char* apple[],
+ const macho_header* mainExecutableMH, const macho_header* dyldMH, uintptr_t dyldSlide,
+ const dyld::SyscallHelpers* vtable, uintptr_t* startGlue);
+ sim_entry_proc_t newDyld = (sim_entry_proc_t)entry;
+ *mainAddr = (*newDyld)(argc, argv, envp, appleParams, mainExecutableMH, (macho_header*)loadAddress,
+ loadAddress - preferredLoadAddress,
+ &sSysCalls, startGlue);
+ return NULL;
+}
+#endif
+
//
// Entry point for dyld. The kernel loads dyld and jumps to __dyld_start which
@@ -2784,23 +5703,43 @@
// Returns address of main() in target program which __dyld_start jumps to
//
uintptr_t
-_main(const struct mach_header* mainExecutableMH, uintptr_t mainExecutableSlide, int argc, const char* argv[], const char* envp[], const char* apple[])
-{
+_main(const macho_header* mainExecutableMH, uintptr_t mainExecutableSlide,
+ int argc, const char* argv[], const char* envp[], const char* apple[],
+ uintptr_t* startGlue)
+{
+ uintptr_t result = 0;
+ sMainExecutableMachHeader = mainExecutableMH;
+#if __MAC_OS_X_VERSION_MIN_REQUIRED
+ // if this is host dyld, check to see if iOS simulator is being run
+ const char* rootPath = _simple_getenv(envp, "DYLD_ROOT_PATH");
+ if ( rootPath != NULL ) {
+ // Add dyld to the kernel image info before we jump to the sim
+ notifyKernelAboutDyld();
+
+ // look to see if simulator has its own dyld
+ char simDyldPath[PATH_MAX];
+ strlcpy(simDyldPath, rootPath, PATH_MAX);
+ strlcat(simDyldPath, "/usr/lib/dyld_sim", PATH_MAX);
+ int fd = my_open(simDyldPath, O_RDONLY, 0);
+ if ( fd != -1 ) {
+ const char* errMessage = useSimulatorDyld(fd, mainExecutableMH, simDyldPath, argc, argv, envp, apple, startGlue, &result);
+ if ( errMessage != NULL )
+ halt(errMessage);
+ return result;
+ }
+ }
+#endif
+
+ CRSetCrashLogMessage("dyld: launch started");
+
setContext(mainExecutableMH, argc, argv, envp, apple);
-
+
// Pickup the pointer to the exec path.
- sExecPath = apple[0];
- bool ignoreEnvironmentVariables = false;
-#if __i386__
- if ( isRosetta() ) {
- // under Rosetta (x86 side)
- // When a 32-bit ppc program is run under emulation on an Intel processor,
- // we want any i386 dylibs (e.g. any used by Rosetta) to not load in the shared region
- // because the shared region is being used by ppc dylibs
- gLinkContext.sharedRegionMode = ImageLoader::kDontUseSharedRegion;
- ignoreEnvironmentVariables = true;
- }
-#endif
+ sExecPath = _simple_getenv(apple, "executable_path");
+
+ // <rdar://problem/13868260> Remove interim apple[0] transition code from dyld
+ if (!sExecPath) sExecPath = apple[0];
+
if ( sExecPath[0] != '/' ) {
// have relative path, use cwd to make absolute
char cwdbuff[MAXPATHLEN];
@@ -2813,39 +5752,151 @@
sExecPath = s;
}
}
- uintptr_t result = 0;
- sMainExecutableMachHeader = mainExecutableMH;
- sMainExecutableIsSetuid = issetugid();
- if ( sMainExecutableIsSetuid )
+ // Remember short name of process for later logging
+ sExecShortName = ::strrchr(sExecPath, '/');
+ if ( sExecShortName != NULL )
+ ++sExecShortName;
+ else
+ sExecShortName = sExecPath;
+
+ configureProcessRestrictions(mainExecutableMH);
+
+#if __MAC_OS_X_VERSION_MIN_REQUIRED
+ if ( gLinkContext.processIsRestricted ) {
pruneEnvironmentVariables(envp, &apple);
+ // set again because envp and apple may have changed or moved
+ setContext(mainExecutableMH, argc, argv, envp, apple);
+ }
else
- checkEnvironmentVariables(envp, ignoreEnvironmentVariables);
- if ( sEnv.DYLD_PRINT_OPTS )
+#endif
+ {
+ checkEnvironmentVariables(envp);
+ defaultUninitializedFallbackPaths(envp);
+ }
+ if ( sEnv.DYLD_PRINT_OPTS )
printOptions(argv);
if ( sEnv.DYLD_PRINT_ENV )
printEnvironmentVariables(envp);
- getHostInfo();
+ getHostInfo(mainExecutableMH, mainExecutableSlide);
// install gdb notifier
stateToHandlers(dyld_image_state_dependents_mapped, sBatchHandlers)->push_back(notifyGDB);
+ stateToHandlers(dyld_image_state_mapped, sSingleHandlers)->push_back(updateAllImages);
// make initial allocations large enough that it is unlikely to need to be re-alloced
- sAllImages.reserve(200);
sImageRoots.reserve(16);
sAddImageCallbacks.reserve(4);
sRemoveImageCallbacks.reserve(4);
sImageFilesNeedingTermination.reserve(16);
sImageFilesNeedingDOFUnregistration.reserve(8);
-
+
+#if !TARGET_IPHONE_SIMULATOR
+#ifdef WAIT_FOR_SYSTEM_ORDER_HANDSHAKE
+ // <rdar://problem/6849505> Add gating mechanism to dyld support system order file generation process
+ WAIT_FOR_SYSTEM_ORDER_HANDSHAKE(dyld::gProcessInfo->systemOrderFlag);
+#endif
+#endif
+
+
try {
+ // add dyld itself to UUID list
+ addDyldImageToUUIDList();
+ notifyKernelAboutDyld();
+
+#if SUPPORT_ACCELERATE_TABLES
+ bool mainExcutableAlreadyRebased = false;
+
+reloadAllImages:
+#endif
+
+ CRSetCrashLogMessage(sLoadingCrashMessage);
// instantiate ImageLoader for main executable
sMainExecutable = instantiateFromLoadedImage(mainExecutableMH, mainExecutableSlide, sExecPath);
- sMainExecutable->setNeverUnload();
gLinkContext.mainExecutable = sMainExecutable;
+ gLinkContext.mainExecutableCodeSigned = hasCodeSignatureLoadCommand(mainExecutableMH);
+
+#if TARGET_IPHONE_SIMULATOR
+ // check main executable is not too new for this OS
+ {
+ if ( ! isSimulatorBinary((uint8_t*)mainExecutableMH, sExecPath) ) {
+ throwf("program was built for a platform that is not supported by this runtime");
+ }
+ uint32_t mainMinOS = sMainExecutable->minOSVersion();
+
+ // dyld is always built for the current OS, so we can get the current OS version
+ // from the load command in dyld itself.
+ uint32_t dyldMinOS = ImageLoaderMachO::minOSVersion((const mach_header*)&__dso_handle);
+ if ( mainMinOS > dyldMinOS ) {
+ #if TARGET_OS_WATCH
+ throwf("app was built for watchOS %d.%d which is newer than this simulator %d.%d",
+ mainMinOS >> 16, ((mainMinOS >> 8) & 0xFF),
+ dyldMinOS >> 16, ((dyldMinOS >> 8) & 0xFF));
+ #elif TARGET_OS_TV
+ throwf("app was built for tvOS %d.%d which is newer than this simulator %d.%d",
+ mainMinOS >> 16, ((mainMinOS >> 8) & 0xFF),
+ dyldMinOS >> 16, ((dyldMinOS >> 8) & 0xFF));
+ #else
+ throwf("app was built for iOS %d.%d which is newer than this simulator %d.%d",
+ mainMinOS >> 16, ((mainMinOS >> 8) & 0xFF),
+ dyldMinOS >> 16, ((dyldMinOS >> 8) & 0xFF));
+ #endif
+ }
+ }
+#endif
+
+
+ #if __MAC_OS_X_VERSION_MIN_REQUIRED
+ // <rdar://problem/22805519> be less strict about old mach-o binaries
+ uint32_t mainSDK = sMainExecutable->sdkVersion();
+ gLinkContext.strictMachORequired = (mainSDK >= DYLD_MACOSX_VERSION_10_12) || gLinkContext.processUsingLibraryValidation;
+ #else
+ // simulators, iOS, tvOS, and watchOS are always strict
+ gLinkContext.strictMachORequired = true;
+ #endif
+
// load shared cache
checkSharedRegionDisable();
#if DYLD_SHARED_CACHE_SUPPORT
- if ( gLinkContext.sharedRegionMode != ImageLoader::kDontUseSharedRegion )
+ if ( gLinkContext.sharedRegionMode != ImageLoader::kDontUseSharedRegion ) {
mapSharedCache();
+ } else {
+ dyld_kernel_image_info_t kernelCacheInfo;
+ bzero(&kernelCacheInfo.uuid[0], sizeof(uuid_t));
+ kernelCacheInfo.load_addr = 0;
+ kernelCacheInfo.fsobjid.fid_objno = 0;
+ kernelCacheInfo.fsobjid.fid_generation = 0;
+ kernelCacheInfo.fsid.val[0] = 0;
+ kernelCacheInfo.fsid.val[0] = 0;
+ task_register_dyld_shared_cache_image_info(mach_task_self(), kernelCacheInfo, true, false);
+ }
#endif
+
+ #if SUPPORT_ACCELERATE_TABLES
+ sAllImages.reserve((sAllCacheImagesProxy != NULL) ? 16 : INITIAL_IMAGE_COUNT);
+ #else
+ sAllImages.reserve(INITIAL_IMAGE_COUNT);
+ #endif
+
+ // Now that shared cache is loaded, setup an versioned dylib overrides
+ #if SUPPORT_VERSIONED_PATHS
+ checkVersionedPaths();
+ #endif
+
+
+ // dyld_all_image_infos image list does not contain dyld
+ // add it as dyldPath field in dyld_all_image_infos
+ // for simulator, dyld_sim is in image list, need host dyld added
+#if TARGET_IPHONE_SIMULATOR
+ // get path of host dyld from table of syscall vectors in host dyld
+ void* addressInDyld = gSyscallHelpers;
+#else
+ // get path of dyld itself
+ void* addressInDyld = (void*)&__dso_handle;
+#endif
+ char dyldPathBuffer[MAXPATHLEN+1];
+ int len = proc_regionfilename(getpid(), (uint64_t)(long)addressInDyld, dyldPathBuffer, MAXPATHLEN);
+ if ( (len != 0) && (strcmp(dyldPathBuffer, gProcessInfo->dyldPath) != 0) ) {
+ gProcessInfo->dyldPath = strdup(dyldPathBuffer);
+ }
+
// load any inserted libraries
if ( sEnv.DYLD_INSERT_LIBRARIES != NULL ) {
for (const char* const* lib = sEnv.DYLD_INSERT_LIBRARIES; *lib != NULL; ++lib)
@@ -2857,13 +5908,19 @@
// link main executable
gLinkContext.linkingMainExecutable = true;
- link(sMainExecutable, sEnv.DYLD_BIND_AT_LAUNCH, ImageLoader::RPathChain(NULL, NULL));
- gLinkContext.linkingMainExecutable = false;
+#if SUPPORT_ACCELERATE_TABLES
+ if ( mainExcutableAlreadyRebased ) {
+ // previous link() on main executable has already adjusted its internal pointers for ASLR
+ // work around that by rebasing by inverse amount
+ sMainExecutable->rebase(gLinkContext, -mainExecutableSlide);
+ }
+#endif
+ link(sMainExecutable, sEnv.DYLD_BIND_AT_LAUNCH, true, ImageLoader::RPathChain(NULL, NULL), -1);
+ sMainExecutable->setNeverUnloadRecursive();
if ( sMainExecutable->forceFlat() ) {
gLinkContext.bindFlat = true;
gLinkContext.prebindUsage = ImageLoader::kUseNoPrebinding;
}
- result = (uintptr_t)sMainExecutable->getMain();
// link any inserted libraries
// do this after linking main executable so that any dylibs pulled in by inserted
@@ -2871,30 +5928,126 @@
if ( sInsertedDylibCount > 0 ) {
for(unsigned int i=0; i < sInsertedDylibCount; ++i) {
ImageLoader* image = sAllImages[i+1];
- link(image, sEnv.DYLD_BIND_AT_LAUNCH, ImageLoader::RPathChain(NULL, NULL));
- }
- }
+ link(image, sEnv.DYLD_BIND_AT_LAUNCH, true, ImageLoader::RPathChain(NULL, NULL), -1);
+ image->setNeverUnloadRecursive();
+ }
+ // only INSERTED libraries can interpose
+ // register interposing info after all inserted libraries are bound so chaining works
+ for(unsigned int i=0; i < sInsertedDylibCount; ++i) {
+ ImageLoader* image = sAllImages[i+1];
+ image->registerInterposing();
+ }
+ }
+
+ // <rdar://problem/19315404> dyld should support interposition even without DYLD_INSERT_LIBRARIES
+ for (long i=sInsertedDylibCount+1; i < sAllImages.size(); ++i) {
+ ImageLoader* image = sAllImages[i];
+ if ( image->inSharedCache() )
+ continue;
+ image->registerInterposing();
+ }
+ #if SUPPORT_ACCELERATE_TABLES
+ if ( (sAllCacheImagesProxy != NULL) && ImageLoader::haveInterposingTuples() ) {
+ // Accelerator tables cannot be used with implicit interposing, so relaunch with accelerator tables disabled
+ ImageLoader::clearInterposingTuples();
+ // unmap all loaded dylibs (but not main executable)
+ for (long i=1; i < sAllImages.size(); ++i) {
+ ImageLoader* image = sAllImages[i];
+ if ( image == sMainExecutable )
+ continue;
+ if ( image == sAllCacheImagesProxy )
+ continue;
+ image->setCanUnload();
+ ImageLoader::deleteImage(image);
+ }
+ // note: we don't need to worry about inserted images because if DYLD_INSERT_LIBRARIES was set we would not be using the accelerator table
+ sAllImages.clear();
+ sImageRoots.clear();
+ sImageFilesNeedingTermination.clear();
+ sImageFilesNeedingDOFUnregistration.clear();
+ sAddImageCallbacks.clear();
+ sRemoveImageCallbacks.clear();
+ sDisableAcceleratorTables = true;
+ sAllCacheImagesProxy = NULL;
+ sMappedRangesStart = NULL;
+ mainExcutableAlreadyRebased = true;
+ gLinkContext.linkingMainExecutable = false;
+ resetAllImages();
+ goto reloadAllImages;
+ }
+ #endif
+
+ // apply interposing to initial set of images
+ for(int i=0; i < sImageRoots.size(); ++i) {
+ sImageRoots[i]->applyInterposing(gLinkContext);
+ }
+ gLinkContext.linkingMainExecutable = false;
+ // <rdar://problem/12186933> do weak binding only after all inserted images linked
+ sMainExecutable->weakBind(gLinkContext);
+
+ #if DYLD_SHARED_CACHE_SUPPORT
+ // If cache has branch island dylibs, tell debugger about them
+ if ( (sSharedCache != NULL) && (sSharedCache->mappingOffset >= 0x78) && (sSharedCache->branchPoolsOffset != 0) ) {
+ uint32_t count = sSharedCache->branchPoolsCount;
+ dyld_image_info info[count];
+ const uint64_t* poolAddress = (uint64_t*)((char*)sSharedCache + sSharedCache->branchPoolsOffset);
+ // <rdar://problem/20799203> empty branch pools can be in development cache
+ if ( ((mach_header*)poolAddress)->magic == sMainExecutableMachHeader->magic ) {
+ for (int poolIndex=0; poolIndex < count; ++poolIndex) {
+ uint64_t poolAddr = poolAddress[poolIndex] + sSharedCacheSlide;
+ info[poolIndex].imageLoadAddress = (mach_header*)(long)poolAddr;
+ info[poolIndex].imageFilePath = "dyld_shared_cache_branch_islands";
+ info[poolIndex].imageFileModDate = 0;
+ }
+ // add to all_images list
+ addImagesToAllImages(count, info);
+ // tell gdb about new branch island images
+ gProcessInfo->notification(dyld_image_adding, count, info);
+ }
+ }
+ #endif
+
+ CRSetCrashLogMessage("dyld: launch, running initializers");
#if SUPPORT_OLD_CRT_INITIALIZATION
// Old way is to run initializers via a callback from crt1.o
if ( ! gRunInitializersOldWay )
+ initializeMainExecutable();
+ #else
+ // run all initializers
+ initializeMainExecutable();
#endif
- initializeMainExecutable(); // run all initializers
+ // find entry point for main executable
+ result = (uintptr_t)sMainExecutable->getThreadPC();
+ if ( result != 0 ) {
+ // main executable uses LC_MAIN, needs to return to glue in libdyld.dylib
+ if ( (gLibSystemHelpers != NULL) && (gLibSystemHelpers->version >= 9) )
+ *startGlue = (uintptr_t)gLibSystemHelpers->startGlueToCallExit;
+ else
+ halt("libdyld.dylib support not present for LC_MAIN");
+ }
+ else {
+ // main executable uses LC_UNIXTHREAD, dyld needs to let "start" in program set up for main()
+ result = (uintptr_t)sMainExecutable->getMain();
+ *startGlue = 0;
+ }
}
catch(const char* message) {
+ syncAllImages();
halt(message);
}
catch(...) {
dyld::log("dyld: launch failed\n");
}
+ CRSetCrashLogMessage(NULL);
+
return result;
}
-
-}; // namespace
-
-
-
+} // namespace
+
+
+