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--- dyld/dyld-132.13/src/dyld.cpp
+++ dyld/dyld-239.3/src/dyld.cpp
@@ -1,6 +1,6 @@
/* -*- mode: C++; c-basic-offset: 4; tab-width: 4 -*-
*
- * Copyright (c) 2004-2008 Apple Inc. All rights reserved.
+ * Copyright (c) 2004-2010 Apple Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
@@ -27,19 +27,31 @@
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
+#include <dirent.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 <_simple.h>
+
#ifndef CPU_SUBTYPE_ARM_V5TEJ
#define CPU_SUBTYPE_ARM_V5TEJ ((cpu_subtype_t) 7)
@@ -49,6 +61,22 @@
#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 VM_PROT_SLIDE
+ #define VM_PROT_SLIDE 0x20
#endif
#include <vector>
@@ -60,6 +88,7 @@
#include "ImageLoader.h"
#include "ImageLoaderMachO.h"
#include "dyldLibSystemInterface.h"
+#include "dyldSyscallInterface.h"
#if DYLD_SHARED_CACHE_SUPPORT
#include "dyld_cache_format.h"
#endif
@@ -67,19 +96,12 @@
#include "coreSymbolicationDyldSupport.hpp"
#endif
-// 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 and ARM are the only architecture that use cpu-sub-types
-#define CPU_SUBTYPES_SUPPORTED __ppc__ || __arm__
+// not libc header for send() syscall interface
+extern "C" ssize_t __sendto(int, const void *, size_t, int, const struct sockaddr *, socklen_t);
+
+
+// ARM is the only architecture that use cpu-sub-types
+#define CPU_SUBTYPES_SUPPORTED __arm__
@@ -90,6 +112,8 @@
extern void addImagesToAllImages(uint32_t infoCount, const dyld_image_info info[]);
extern void removeImageFromAllImages(const mach_header* mh);
extern void setAlImageInfosHalt(const char* message, uintptr_t flags);
+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[]);
// magic so CrashReporter logs message
extern "C" {
@@ -98,6 +122,8 @@
// 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" void* __dso_handle;
//
@@ -108,7 +134,19 @@
//
//
//
-
+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 {
@@ -123,6 +161,8 @@
const char* const * DYLD_FALLBACK_LIBRARY_PATH;
const char* const * DYLD_INSERT_LIBRARIES;
const char* const * LD_LIBRARY_PATH; // for unix conformance
+ const char* const * DYLD_VERSIONED_LIBRARY_PATH;
+ const char* const * DYLD_VERSIONED_FRAMEWORK_PATH;
bool DYLD_PRINT_LIBRARIES;
bool DYLD_PRINT_LIBRARIES_POST_LAUNCH;
bool DYLD_BIND_AT_LAUNCH;
@@ -130,6 +170,7 @@
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
@@ -149,18 +190,28 @@
// 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
};
-
+
+
+
typedef std::vector<dyld_image_state_change_handler> StateHandlers;
-struct RegisteredDOF { const mach_header* mh; int registrationID; };
-
+
+
+enum RestrictedReason { restrictedNot, restrictedBySetGUid, restrictedBySegment, restrictedByEntitlements };
+
// all global state
static const char* sExecPath = 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;
+#endif
static ImageLoader* sMainExecutable = NULL;
static bool sProcessIsRestricted = false;
+static RestrictedReason sRestrictedReason = restrictedNot;
static unsigned int sInsertedDylibCount = 0;
static std::vector<ImageLoader*> sAllImages;
static std::vector<ImageLoader*> sImageRoots;
@@ -168,8 +219,8 @@
static std::vector<RegisteredDOF> sImageFilesNeedingDOFUnregistration;
static std::vector<ImageCallback> sAddImageCallbacks;
static std::vector<ImageCallback> sRemoveImageCallbacks;
-static StateHandlers sSingleHandlers[7];
-static StateHandlers sBatchHandlers[7];
+static void* sSingleHandlers[7][3];
+static void* sBatchHandlers[7][3];
static ImageLoader* sLastImageByAddressCache;
static EnvironmentVariables sEnv;
static const char* sFrameworkFallbackPaths[] = { "$HOME/Library/Frameworks", "/Library/Frameworks", "/Network/Library/Frameworks", "/System/Library/Frameworks", NULL };
@@ -178,8 +229,15 @@
static ImageLoader* sBundleBeingLoaded = NULL; // hack until OFI is reworked
#if DYLD_SHARED_CACHE_SUPPORT
static const dyld_cache_header* sSharedCache = NULL;
+static long sSharedCacheSlide = 0;
static bool sSharedCacheIgnoreInodeAndTimeStamp = false;
-static const char* sSharedCacheDir = DYLD_SHARED_CACHE_DIR;
+#if __IPHONE_OS_VERSION_MIN_REQUIRED && DYLD_SHARED_CACHE_SUPPORT
+ bool gSharedCacheOverridden = false;
+ static const char* sSharedCacheDir = IPHONE_DYLD_SHARED_CACHE_DIR;
+ static bool sDylibsOverrideCache = false;
+#else
+ static const char* sSharedCacheDir = MACOSX_DYLD_SHARED_CACHE_DIR;
+#endif
#endif
ImageLoader::LinkContext gLinkContext;
bool gLogAPIs = false;
@@ -187,7 +245,14 @@
#if SUPPORT_OLD_CRT_INITIALIZATION
bool gRunInitializersOldWay = false;
#endif
-
+static std::vector<DylibOverride> sDylibOverrides;
+#if !TARGET_IPHONE_SIMULATOR
+static int sLogSocket = -1;
+#endif
+static bool sFrameworksFoundAsDylibs = false;
+
+static std::vector<ImageLoader::DynamicReference> sDynamicReferences;
+
//
// The MappedRanges structure is used for fast address->image lookups.
@@ -304,24 +369,147 @@
//#define ALTERNATIVE_LOGFILE "/dev/console"
+#if !TARGET_IPHONE_SIMULATOR
static int sLogfile = STDERR_FILENO;
-
-void log(const char* format, ...)
+#endif
+
+#if LOG_BINDINGS
+static int sBindingsLogfile = -1;
+static void mysprintf(char* dst, 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);
+ strcpy(dst, _simple_string(buf));
+ _simple_sfree(buf);
+ }
+ else {
+ strcpy(dst, "out of memory");
+ }
+}
+void logBindings(const char* format, ...)
+{
+ if ( sBindingsLogfile != -1 ) {
+ va_list list;
+ va_start(list, format);
+ _simple_vdprintf(sBindingsLogfile, format, list);
+ va_end(list);
+ }
+}
+#endif
+
+#if !TARGET_IPHONE_SIMULATOR
+// based on CFUtilities.c: also_do_stderr()
+static bool useSyslog()
+{
+ // Use syslog() for processes managed by launchd
+ if ( (gLibSystemHelpers != NULL) && (gLibSystemHelpers->version >= 11) ) {
+ if ( (*gLibSystemHelpers->isLaunchdOwned)() ) {
+ 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 ( useSyslog() )
+ socket_syslogv(LOG_ERR, format, list);
+ else
+ _simple_vdprintf(sLogfile, format, list);
+}
+
+void log(const char* format, ...)
{
va_list list;
va_start(list, format);
+ vlog(format, list);
+ va_end(list);
+}
+
+
+void vwarn(const char* format, va_list list)
+{
+ _simple_dprintf(sLogfile, "dyld: warning, ");
_simple_vdprintf(sLogfile, format, list);
- va_end(list);
}
void warn(const char* format, ...)
{
- _simple_dprintf(sLogfile, "dyld: warning, ");
va_list list;
va_start(list, format);
- _simple_vdprintf(sLogfile, format, list);
+ vwarn(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()
+static long sAllImagesLock = 0;
+
+static void allImagesLock()
+{
+ //dyld::log("allImagesLock()\n");
+ while ( ! OSAtomicCompareAndSwapPtrBarrier((void*)0, (void*)1, (void**)&sAllImagesLock) ) {
+ // spin
+ }
+}
+
+static void allImagesUnlock()
+{
+ //dyld::log("allImagesUnlock()\n");
+ while ( ! OSAtomicCompareAndSwapPtrBarrier((void*)1, (void*)0, (void**)&sAllImagesLock) ) {
+ // spin
+ }
+}
+
+
// utility class to assure files are closed when an exception is thrown
@@ -337,7 +525,7 @@
FileOpener::FileOpener(const char* path)
: fd(-1)
{
- fd = open(path, O_RDONLY, 0);
+ fd = my_open(path, O_RDONLY, 0);
}
FileOpener::~FileOpener()
@@ -347,19 +535,8 @@
}
-// 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();
if ( !sEnv.DYLD_DISABLE_DOFS && (dofSectionCount != 0) ) {
int fd = open("/dev/" DTRACEMNR_HELPER, O_RDWR);
@@ -390,7 +567,7 @@
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);
}
}
@@ -432,41 +609,43 @@
}
+
// 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;
}
-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 ImageLoader* image)
{
@@ -475,7 +654,7 @@
if ( handlers != NULL ) {
dyld_image_info info;
info.imageLoadAddress = image->machHeader();
- info.imageFilePath = image->getPath();
+ 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);
@@ -487,17 +666,70 @@
}
}
}
+ 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 CORESYMBOLICATION_SUPPORT
// mach message csdlc about dynamically loaded images
- if ( dyld_all_image_infos.coreSymbolicationShmPage != NULL) {
- CSCppDyldSharedMemoryPage* connection = (CSCppDyldSharedMemoryPage*)dyld_all_image_infos.coreSymbolicationShmPage;
- if ( connection->is_valid_version() ) {
- if ( state == dyld_image_state_terminated ) {
+ if ( image->addFuncNotified() && (state == dyld_image_state_terminated) ) {
+ if ( sEnv.DYLD_PRINT_CS_NOTIFICATIONS ) {
+ dyld::log("dyld core symbolication unload notification: %p %s\n", image->machHeader(), image->getPath());
+ }
+ if ( dyld::gProcessInfo->coreSymbolicationShmPage != NULL) {
+ CSCppDyldSharedMemoryPage* connection = (CSCppDyldSharedMemoryPage*)dyld::gProcessInfo->coreSymbolicationShmPage;
+ if ( connection->is_valid_version() ) {
coresymbolication_unload_image(connection, image);
}
}
}
-#endif
+#endif
+}
+
+
+
+
+//
+// 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);
+ }
+ }
}
@@ -513,18 +745,20 @@
std::vector<dyld_image_state_change_handler>* handlers = stateToHandlers(state, sBatchHandlers);
if ( handlers != 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();
+ 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;
+ }
if ( sBundleBeingLoaded != NULL ) {
dyld_image_states imageState = sBundleBeingLoaded->getState();
if ( (imageState == state) || (orLater && (imageState > state)) )
*end++ = sBundleBeingLoaded;
}
+ const char* dontLoadReason = NULL;
unsigned int count = end-images;
if ( end != images ) {
// sort bottom up
@@ -536,7 +770,7 @@
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();
// special case for add_image hook
if ( state == dyld_image_state_bound )
@@ -548,8 +782,7 @@
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;
+ dontLoadReason = strdup(result);
}
}
else {
@@ -559,18 +792,28 @@
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
- const char* str = strdup(result);
- throw str;
+ dontLoadReason = strdup(result);
+ break;
}
}
}
}
+ allImagesUnlock();
+ if ( dontLoadReason != NULL )
+ throw dontLoadReason;
}
#if CORESYMBOLICATION_SUPPORT
- if ( dyld_all_image_infos.coreSymbolicationShmPage != NULL) {
- CSCppDyldSharedMemoryPage* connection = (CSCppDyldSharedMemoryPage*)dyld_all_image_infos.coreSymbolicationShmPage;
- if ( connection->is_valid_version() ) {
- if ( state == dyld_image_state_rebased ) {
+ if ( state == dyld_image_state_rebased ) {
+ if ( sEnv.DYLD_PRINT_CS_NOTIFICATIONS ) {
+ for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
+ dyld_image_states imageState = (*it)->getState();
+ if ( (imageState == dyld_image_state_rebased) || (orLater && (imageState > dyld_image_state_rebased)) )
+ dyld::log("dyld core symbolication load notification: %p %s\n", (*it)->machHeader(), (*it)->getPath());
+ }
+ }
+ if ( dyld::gProcessInfo->coreSymbolicationShmPage != NULL) {
+ CSCppDyldSharedMemoryPage* connection = (CSCppDyldSharedMemoryPage*)dyld::gProcessInfo->coreSymbolicationShmPage;
+ if ( connection->is_valid_version() ) {
// This needs to be captured now
uint64_t load_timestamp = mach_absolute_time();
for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
@@ -584,6 +827,8 @@
#endif
}
+
+
static void notifyBatch(dyld_image_states state)
{
notifyBatchPartial(state, false, NULL);
@@ -607,6 +852,13 @@
(*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();
@@ -632,10 +884,35 @@
}
#endif
+static void addDynamicReference(ImageLoader* from, ImageLoader* to) {
+ // don't add dynamic reference if either are in the shared cache
+ if( from->inSharedCache() )
+ return;
+ 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
+ for (std::vector<ImageLoader::DynamicReference>::iterator it=sDynamicReferences.begin(); it != sDynamicReferences.end(); ++it) {
+ if ( (it->from == from) && (it->to == to) )
+ return;
+ }
+ //dyld::log("addDynamicReference(%s, %s\n", from->getShortName(), to->getShortName());
+ ImageLoader::DynamicReference t;
+ t.from = from;
+ t.to = to;
+ sDynamicReferences.push_back(t);
+}
+
static void addImage(ImageLoader* image)
{
// add to master list
- sAllImages.push_back(image);
+ allImagesLock();
+ sAllImages.push_back(image);
+ allImagesUnlock();
// update mapped ranges
uintptr_t lastSegStart = 0;
@@ -667,17 +944,23 @@
}
+//
+// 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() ) {
@@ -705,13 +988,18 @@
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
+ sDynamicReferences.erase(std::remove_if(sDynamicReferences.begin(), sDynamicReferences.end(), RefUsesImage(image)), sDynamicReferences.end());
+
// 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;
@@ -734,6 +1022,28 @@
}
+void runImageTerminators(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);
+ image->doTermination(gLinkContext);
+ mightBeMore = true;
+ break;
+ }
+ }
+ } while ( mightBeMore );
+
+ // <rdar://problem/7740779> dyld should directly call __cxa_finalize()
+ if ( (gLibSystemHelpers != NULL) && (gLibSystemHelpers->version >= 8) )
+ (*gLibSystemHelpers->cxa_finalize)(image->machHeader());
+
+}
+
static void terminationRecorder(ImageLoader* image)
{
sImageFilesNeedingTermination.push_back(image);
@@ -747,19 +1057,22 @@
void initializeMainExecutable()
{
-
// record that we've reached this step
gLinkContext.startedInitializingMainExecutable = true;
// run initialzers for any inserted dylibs
+ ImageLoader::InitializerTimingList initializerTimes[sAllImages.size()];
const int rootCount = sImageRoots.size();
if ( rootCount > 1 ) {
- for(int i=1; i < rootCount; ++i)
- sImageRoots[i]->runInitializers(gLinkContext);
+ for(int i=1; i < rootCount; ++i) {
+ initializerTimes[0].count = 0;
+ sImageRoots[i]->runInitializers(gLinkContext, initializerTimes[0]);
+ }
}
// run initializers for main executable and everything it brings up
- sMainExecutable->runInitializers(gLinkContext);
+ initializerTimes[0].count = 0;
+ sMainExecutable->runInitializers(gLinkContext, initializerTimes[0]);
// register atexit() handler to run terminators in all loaded images when this process exits
if ( gLibSystemHelpers != NULL )
@@ -767,7 +1080,7 @@
// dump info if requested
if ( sEnv.DYLD_PRINT_STATISTICS )
- ImageLoaderMachO::printStatistics(sAllImages.size());
+ ImageLoaderMachO::printStatistics(sAllImages.size(), initializerTimes[0]);
}
bool mainExecutablePrebound()
@@ -783,22 +1096,149 @@
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);
- }
- sImageFilesNeedingTermination.clear();
- notifyBatch(dyld_image_state_terminated);
-}
+ try {
+ const unsigned int imageCount = sImageFilesNeedingTermination.size();
+ for(unsigned int i=imageCount; i > 0; --i){
+ ImageLoader* image = sImageFilesNeedingTermination[i-1];
+ image->doTermination(gLinkContext);
+ }
+ sImageFilesNeedingTermination.clear();
+ notifyBatch(dyld_image_state_terminated);
+ }
+ catch (const char* msg) {
+ halt(msg);
+ }
+}
+
+
+#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)
+static void checkDylibOverride(const char* dylibFile)
+{
+ //dyld::log("checkDylibOverride('%s')\n", dylibFile);
+ uint32_t altVersion;
+ char sysInstallName[PATH_MAX];
+ if ( getDylibVersionAndInstallname(dylibFile, &altVersion, sysInstallName) ) {
+ //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];
+ int dirPathLen = strlen(dirPath);
+ strlcpy(dylibPath, dirPath, PATH_MAX);
+ 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];
+ int dirPathLen = strlen(dirPath);
+ strlcpy(frameworkPath, dirPath, PATH_MAX);
+ 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 = 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 };
@@ -817,20 +1257,88 @@
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];
- result[index++] = str;
+ if ( (mainExecutableDir != NULL) && (strncmp(start, "@loader_path/", 13) == 0) ) {
+ int 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) ) {
+ int 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;
+ }
}
}
int len = strlen(start);
- char* str = new char[len+1];
- strcpy(str, start);
- result[index++] = str;
+ if ( (mainExecutableDir != NULL) && (strncmp(start, "@loader_path/", 13) == 0) ) {
+ int 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;
+ }
+ else if ( (mainExecutableDir != NULL) && (strncmp(start, "@executable_path/", 17) == 0) ) {
+ int 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;
+ }
}
@@ -898,23 +1406,23 @@
}
}
-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);
+ appendParsedColonList(value, mainExecutableDir, &sEnv.DYLD_FRAMEWORK_PATH);
}
else if ( strcmp(key, "DYLD_FALLBACK_FRAMEWORK_PATH") == 0 ) {
- sEnv.DYLD_FALLBACK_FRAMEWORK_PATH = parseColonList(value);
+ appendParsedColonList(value, mainExecutableDir, &sEnv.DYLD_FALLBACK_FRAMEWORK_PATH);
}
else if ( strcmp(key, "DYLD_LIBRARY_PATH") == 0 ) {
- sEnv.DYLD_LIBRARY_PATH = parseColonList(value);
+ appendParsedColonList(value, mainExecutableDir, &sEnv.DYLD_LIBRARY_PATH);
}
else if ( strcmp(key, "DYLD_FALLBACK_LIBRARY_PATH") == 0 ) {
- sEnv.DYLD_FALLBACK_LIBRARY_PATH = parseColonList(value);
+ appendParsedColonList(value, mainExecutableDir, &sEnv.DYLD_FALLBACK_LIBRARY_PATH);
}
else if ( (strcmp(key, "DYLD_ROOT_PATH") == 0) || (strcmp(key, "DYLD_PATHS_ROOT") == 0) ) {
if ( strcmp(value, "/") != 0 ) {
- gLinkContext.rootPaths = parseColonList(value);
+ 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");
@@ -928,7 +1436,7 @@
gLinkContext.imageSuffix = value;
}
else if ( strcmp(key, "DYLD_INSERT_LIBRARIES") == 0 ) {
- sEnv.DYLD_INSERT_LIBRARIES = parseColonList(value);
+ sEnv.DYLD_INSERT_LIBRARIES = parseColonList(value, NULL);
}
else if ( strcmp(key, "DYLD_PRINT_OPTS") == 0 ) {
sEnv.DYLD_PRINT_OPTS = true;
@@ -989,8 +1497,17 @@
else if ( strcmp(key, "DYLD_PRINT_WARNINGS") == 0 ) {
gLinkContext.verboseWarnings = true;
}
- else if ( strcmp(key, "DYLD_NO_PIE") == 0 ) {
- gLinkContext.noPIE = 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 ) {
if ( strcmp(value, "private") == 0 ) {
@@ -1034,10 +1551,95 @@
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);
+ }
+ else if ( strcmp(key, "DYLD_VERSIONED_FRAMEWORK_PATH") == 0 ) {
+ appendParsedColonList(value, mainExecutableDir, &sEnv.DYLD_VERSIONED_FRAMEWORK_PATH);
+ }
+#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)];
+ 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 int keyLen = equals-keyEqualsValue;
+ 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
//
@@ -1059,13 +1661,33 @@
}
}
*d++ = NULL;
-
+// <rdar://11894054> Disable warnings about DYLD_ env vars being ignored. The warnings are causing too much confusion.
+#if 0
+ if ( removedCount != 0 ) {
+ dyld::log("dyld: DYLD_ environment variables being ignored because ");
+ switch (sRestrictedReason) {
+ case restrictedNot:
+ break;
+ case restrictedBySetGUid:
+ dyld::log("main executable (%s) is setuid or setgid\n", sExecPath);
+ break;
+ case restrictedBySegment:
+ dyld::log("main executable (%s) has __RESTRICT/__restrict section\n", sExecPath);
+ break;
+ case restrictedByEntitlements:
+ dyld::log("main executable (%s) is code signed with entitlements\n", sExecPath);
+ break;
+ }
+ }
+#endif
// 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
@@ -1088,7 +1710,7 @@
char key[keyLen+1];
strncpy(key, keyEqualsValue, keyLen);
key[keyLen] = '\0';
- processDyldEnvironmentVarible(key, value);
+ processDyldEnvironmentVariable(key, value, NULL);
}
}
else if ( strncmp(keyEqualsValue, "HOME=", 5) == 0 ) {
@@ -1096,9 +1718,13 @@
}
else if ( strncmp(keyEqualsValue, "LD_LIBRARY_PATH=", 16) == 0 ) {
const char* path = &keyEqualsValue[16];
- sEnv.LD_LIBRARY_PATH = parseColonList(path);
- }
- }
+ sEnv.LD_LIBRARY_PATH = parseColonList(path, NULL);
+ }
+ }
+
+#if SUPPORT_LC_DYLD_ENVIRONMENT
+ checkLoadCommandEnvironmentVariables();
+#endif // SUPPORT_LC_DYLD_ENVIRONMENT
// default value for DYLD_FALLBACK_FRAMEWORK_PATH, if not set in environment
if ( sEnv.DYLD_FALLBACK_FRAMEWORK_PATH == NULL ) {
@@ -1119,34 +1745,53 @@
paths_expand_roots(paths, "$HOME", home);
sEnv.DYLD_FALLBACK_LIBRARY_PATH = paths;
}
+
+ // <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;
+ }
+
+#if SUPPORT_VERSIONED_PATHS
+ checkVersionedPaths();
+#endif
}
static void getHostInfo()
{
-#if 1
+#if CPU_SUBTYPES_SUPPORTED
+#if __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;
+#elif __ARM_ARCH_7K__
+ sHostCPU = CPU_TYPE_ARM;
+ sHostCPUsubtype = CPU_SUBTYPE_ARM_V7K;
+#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);
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";
+#endif
#endif
}
static void checkSharedRegionDisable()
{
- #if !__LP64__
+#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*)(uintptr_t)SHARED_REGION_BASE, (void*)(uintptr_t)(SHARED_REGION_BASE + SHARED_REGION_SIZE)) ) {
@@ -1154,17 +1799,18 @@
if ( gLinkContext.verboseMapping )
dyld::warn("disabling shared region because main executable overlaps\n");
}
- #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 unsigned int imageCount = sAllImages.size();
+ for(unsigned int i=0; i < imageCount; ++i) {
+ if ( possibleImage == sAllImages[i] ) {
+ return true;
+ }
+ }
return false;
}
@@ -1310,31 +1956,22 @@
//
-#if __ppc__
-//
-// 32-bit PowerPC 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 }
-};
-#endif
-
-
#if __arm__
//
// ARM sub-type lists
//
-const int kARM_RowCount = 5;
-static const cpu_subtype_t kARM[kARM_RowCount][6] = {
+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, v6, v5, and v4
+ { CPU_SUBTYPE_ARM_V7K, CPU_SUBTYPE_ARM_V6, CPU_SUBTYPE_ARM_V5TEJ, CPU_SUBTYPE_ARM_V4T, CPU_SUBTYPE_ARM_ALL, 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_V7K, 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 },
@@ -1357,14 +1994,6 @@
static const cpu_subtype_t* findCPUSubtypeList(cpu_type_t cpu, cpu_subtype_t subtype)
{
switch (cpu) {
-#if __ppc__
- case CPU_TYPE_POWERPC:
- for (int i=0; i < kPPC_RowCount ; ++i) {
- if ( kPPC32[i][0] == subtype )
- return kPPC32[i];
- }
- break;
-#endif
#if __arm__
case CPU_TYPE_ARM:
for (int i=0; i < kARM_RowCount ; ++i) {
@@ -1419,15 +2048,6 @@
for(uint32_t i=0; i < OSSwapBigToHostInt32(fh->nfat_arch); ++i) {
if ( (cpu_type_t)OSSwapBigToHostInt32(archs[i].cputype) == cpu) {
switch (cpu) {
-#if __ppc__
- case CPU_TYPE_POWERPC:
- if ( (cpu_subtype_t)OSSwapBigToHostInt32(archs[i].cpusubtype) == CPU_SUBTYPE_POWERPC_ALL ) {
- *offset = OSSwapBigToHostInt32(archs[i].offset);
- *len = OSSwapBigToHostInt32(archs[i].size);
- return true;
- }
- break;
-#endif
#if __arm__
case CPU_TYPE_ARM:
if ( (cpu_subtype_t)OSSwapBigToHostInt32(archs[i].cpusubtype) == CPU_SUBTYPE_ARM_ALL ) {
@@ -1520,12 +2140,6 @@
// 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
@@ -1563,70 +2177,73 @@
throw "main executable not a known format";
}
+
#if DYLD_SHARED_CACHE_SUPPORT
-bool inSharedCache(const char* path)
+static bool findInSharedCacheImage(const char* path, const struct stat* stat_buf, const macho_header** mh, const char** pathInCache, long* slide)
{
if ( sSharedCache != NULL ) {
- struct stat stat_buf;
- if ( stat(path, &stat_buf) == -1 )
- return false;
-
+#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
// 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];
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 ( strcmp(path, aPath) == 0 ) {
+ // found image in cache
+ *mh = (macho_header*)(p->address+sSharedCacheSlide);
+ *pathInCache = aPath;
+ *slide = sSharedCacheSlide;
+ return true;
+ }
+#elif __MAC_OS_X_VERSION_MIN_REQUIRED
// check mtime and inode first because it is fast
if ( sSharedCacheIgnoreInodeAndTimeStamp
- || ( ((time_t)p->modTime == stat_buf.st_mtime) && ((ino_t)p->inode == stat_buf.st_ino) ) ) {
+ || ( ((time_t)p->modTime == stat_buf->st_mtime) && ((ino_t)p->inode == stat_buf->st_ino) ) ) {
// 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);
+ const char* aPath = (char*)sSharedCache + p->pathFileOffset;
+ bool cacheHit = (strcmp(path, aPath) == 0);
if ( ! 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
+ // 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=%p\n",
+ // *mh, p->address, sSharedCacheSlide, aPath);
+ *pathInCache = aPath;
+ *slide = sSharedCacheSlide;
return true;
}
}
+#endif
}
}
return false;
}
-static ImageLoader* findSharedCacheImage(const struct stat& stat_buf, const char* path)
-{
- if ( sSharedCache != NULL ) {
- // 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];
- for( const dyld_cache_image_info* p = start; p != end; ++p) {
- // check mtime and inode first because it is fast
- if ( sSharedCacheIgnoreInodeAndTimeStamp
- || ( ((time_t)p->modTime == stat_buf.st_mtime) && ((ino_t)p->inode == stat_buf.st_ino) ) ) {
- // 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 ) {
- // 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 ( cacheHit ) {
- // found image in cache, instantiate an ImageLoader with it
- return ImageLoaderMachO::instantiateFromCache((macho_header*)(p->address), pathInCache, stat_buf, gLinkContext);
- }
- }
- }
- }
- return NULL;
-}
+bool inSharedCache(const char* path)
+{
+ const macho_header* mhInCache;
+ const char* pathInCache;
+ long slide;
+ return findInSharedCacheImage(path, NULL, &mhInCache, &pathInCache, &slide);
+}
+
#endif
static ImageLoader* checkandAddImage(ImageLoader* image, const LoadContext& context)
@@ -1640,6 +2257,7 @@
if ( installPath != NULL) {
if ( strcmp(loadedImageInstallPath, installPath) == 0 ) {
//dyld::log("duplicate(%s) => %p\n", installPath, anImage);
+ removeImage(image);
ImageLoader::deleteImage(image);
return anImage;
}
@@ -1667,7 +2285,7 @@
}
// 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;
@@ -1706,10 +2324,20 @@
}
// try mach-o loader
+ if ( shortPage )
+ throw "file too short";
if ( isCompatibleMachO(firstPage, path) ) {
- if ( shortPage )
- throw "file too short";
-
+
+ // only MH_BUNDLE, MH_DYLIB, and some MH_EXECUTE can be dynamically loaded
+ switch ( ((mach_header*)firstPage)->filetype ) {
+ case MH_EXECUTE:
+ case MH_DYLIB:
+ case MH_BUNDLE:
+ break;
+ default:
+ throw "mach-o, but wrong filetype";
+ }
+
// instantiate an image
ImageLoader* image = ImageLoaderMachO::instantiateFromFile(path, fd, firstPage, fileOffset, fileLength, stat_buf, gLinkContext);
@@ -1734,39 +2362,10 @@
}
-// try to open file
-static ImageLoader* loadPhase5open(const char* path, const LoadContext& context, std::vector<const char*>* exceptions)
+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);
@@ -1791,10 +2390,140 @@
}
}
+
+#if __MAC_OS_X_VERSION_MIN_REQUIRED
+static ImageLoader* loadPhase5load(const char* path, const char* orgPath, const LoadContext& context, 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 ( my_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
+ const macho_header* mhInCache;
+ const char* pathInCache;
+ long slideInCache;
+ if ( findInSharedCacheImage(path, &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, 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 ( sDylibsOverrideCache ) {
+ // 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, 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 ( !sDylibsOverrideCache ) {
+ // 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) ) {
+ 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);
@@ -1802,12 +2531,13 @@
ImageLoader* anImage = *it;
// 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 ( 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) {
@@ -1818,6 +2548,16 @@
}
}
}
+ // 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);
@@ -1826,37 +2566,46 @@
// 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, 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, 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, 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, exceptions);
}
if ( image == NULL )
- image = loadPhase5(path, context, exceptions);
+ image = loadPhase5(path, orgPath, context, exceptions);
return image;
}
-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); // 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, std::vector<const char*>* exceptions)
{
//dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
ImageLoader* image = NULL;
@@ -1873,7 +2622,7 @@
strcpy(&addPoint[1], &path[17]);
else
strcpy(newPath, &path[17]);
- image = loadPhase4(newPath, context, exceptions);
+ image = loadPhase4(newPath, orgPath, context, exceptions);
if ( image != NULL )
return image;
@@ -1887,7 +2636,7 @@
strcpy(&addPoint[1], &path[17]);
else
strcpy(newRealPath, &path[17]);
- image = loadPhase4(newRealPath, context, exceptions);
+ image = loadPhase4(newRealPath, orgPath, context, exceptions);
if ( image != NULL )
return image;
}
@@ -1904,7 +2653,7 @@
strcpy(&addPoint[1], &path[13]);
else
strcpy(newPath, &path[13]);
- image = loadPhase4(newPath, context, exceptions);
+ image = loadPhase4(newPath, orgPath, context, exceptions);
if ( image != NULL )
return image;
@@ -1918,7 +2667,7 @@
strcpy(&addPoint[1], &path[13]);
else
strcpy(newRealPath, &path[13]);
- image = loadPhase4(newRealPath, context, exceptions);
+ image = loadPhase4(newRealPath, orgPath, context, exceptions);
if ( image != NULL )
return image;
}
@@ -1934,7 +2683,13 @@
strcpy(newPath, anRPath);
strcat(newPath, "/");
strcat(newPath, trailingPath);
- image = loadPhase4(newPath, context, exceptions);
+ image = loadPhase4(newPath, orgPath, context, 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;
}
@@ -1943,7 +2698,7 @@
// 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, exceptions);
if ( image != NULL )
return image;
}
@@ -1956,12 +2711,12 @@
throwf("unsafe use of relative rpath %s in %s with restricted binary", path, context.origin);
}
- return loadPhase4(path, context, exceptions);
+ return loadPhase4(path, orgPath, context, 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)
{
@@ -1977,13 +2732,15 @@
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, 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);
for(const char* const* lp = libraryPaths; *lp != NULL; ++lp) {
@@ -1992,7 +2749,7 @@
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, exceptions);
if ( image != NULL )
return image;
}
@@ -2001,27 +2758,27 @@
}
// 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, 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, 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, exceptions);
if ( image != NULL )
return image;
}
// try raw path
- image = loadPhase3(path, context, exceptions);
+ image = loadPhase3(path, orgPath, context, exceptions);
if ( image != NULL )
return image;
@@ -2030,7 +2787,7 @@
if ( (fallbackLibraryPaths != NULL) && !context.useFallbackPaths )
fallbackLibraryPaths = NULL;
if ( !context.dontLoad && (exceptions != NULL) && ((sEnv.DYLD_FALLBACK_FRAMEWORK_PATH != NULL) || (fallbackLibraryPaths != NULL)) ) {
- image = loadPhase2(path, context, sEnv.DYLD_FALLBACK_FRAMEWORK_PATH, fallbackLibraryPaths, exceptions);
+ image = loadPhase2(path, orgPath, context, sEnv.DYLD_FALLBACK_FRAMEWORK_PATH, fallbackLibraryPaths, exceptions);
if ( image != NULL )
return image;
}
@@ -2039,7 +2796,7 @@
}
// 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, std::vector<const char*>* exceptions)
{
//dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
@@ -2049,14 +2806,14 @@
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, exceptions);
if ( image != NULL )
return image;
}
}
// try raw path
- return loadPhase1(path, context, exceptions);
+ return loadPhase1(path, orgPath, context, exceptions);
}
//
@@ -2075,6 +2832,9 @@
//
ImageLoader* load(const char* path, const LoadContext& context)
{
+ CRSetCrashLogMessage2(path);
+ const char* orgPath = path;
+
//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
@@ -2084,18 +2844,36 @@
}
// 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, 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, &exceptions);
+ 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 __IPHONE_OS_VERSION_MIN_REQUIRED && 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 ) {
+ if ( !image->inSharedCache() && inSharedCache(path) ) {
+ gSharedCacheOverridden = true;
+ }
+ }
+#endif
return image;
+ }
else if ( exceptions.size() == 0 ) {
- if ( context.dontLoad )
+ if ( context.dontLoad ) {
return NULL;
+ }
else
throw "image not found";
}
@@ -2118,48 +2896,77 @@
-
#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"
+#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_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 __ARM_ARCH_7K__
+ #define ARCH_NAME "armv7k"
+ #define ARCH_CACHE_MAGIC "dyld_v1 armv7k"
+#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 int __attribute__((noinline)) _shared_region_map_and_slide_np(int fd, uint32_t count, const shared_file_mapping_np mappings[],
+ int codeSignatureMappingIndex, int slide, void* slideInfo, uint32_t slideInfoSize)
+{
+ // register code signature blob for whole dyld cache
+ if ( codeSignatureMappingIndex != -1 ) {
+ fsignatures_t siginfo;
+ siginfo.fs_file_start = 0; // cache always starts at beginning of file
+ siginfo.fs_blob_start = (void*)mappings[codeSignatureMappingIndex].sfm_file_offset;
+ siginfo.fs_blob_size = mappings[codeSignatureMappingIndex].sfm_size;
+ int result = fcntl(fd, F_ADDFILESIGS, &siginfo);
+ // <rdar://problem/12891874> don't warn in chrooted case because mapping syscall is about to fail too
+ if ( (result == -1) && gLinkContext.verboseMapping )
+ dyld::log("dyld: code signature registration for shared cache failed with errno=%d\n", errno);
+ }
+
+ if ( gLinkContext.sharedRegionMode == ImageLoader::kUseSharedRegion ) {
+ return syscall(438, fd, count, mappings, slide, slideInfo, slideInfoSize);
}
// remove the shared region sub-map
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;
@@ -2168,44 +2975,54 @@
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
+ if ( slide != 0 ) {
+ const uintptr_t dataPagesStart = mappings[1].sfm_address;
+ const dyld_cache_slide_info* slideInfoHeader = (dyld_cache_slide_info*)slideInfo;
+ 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()
{
@@ -2214,30 +3031,102 @@
int openSharedCacheFile()
{
- char path[1024];
- strcpy(path, sSharedCacheDir);
- strcat(path, "/");
-#if __ppc__
- // rosetta cannot handle optimized _ppc cache, so it use _rosetta cache instead, rdar://problem/5495438
- if ( isRosetta() )
- strcat(path, DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME_ROSETTA);
- else
-#endif
- strcat(path, DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME);
- return ::open(path, O_RDONLY);
+ char path[MAXPATHLEN];
+ strlcpy(path, sSharedCacheDir, MAXPATHLEN);
+ strlcat(path, "/", MAXPATHLEN);
+ strlcat(path, DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME, MAXPATHLEN);
+ return my_open(path, O_RDONLY, 0);
+}
+
+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 = 0;
+ uint64_t 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;
+ }
+ }
+
+ // find slop space
+ const uint64_t space = (SHARED_REGION_BASE + SHARED_REGION_SIZE) - highAddress;
+
+ // choose new random slide
+ long slide = (arc4random() % space) & (-4096);
+ //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;
+ uint64_t cacheBaseAddress = 0;
// quick check if a cache is alreay 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 ) {
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::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);
}
}
else {
@@ -2251,13 +3140,13 @@
// user booted machine in safe-boot mode
struct stat dyldCacheStatInfo;
// Don't use custom DYLD_SHARED_CACHE_DIR if provided, use standard path
- if ( ::stat(DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME, &dyldCacheStatInfo) == 0 ) {
+ 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(DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME);
+ ::unlink(MACOSX_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME);
gLinkContext.sharedRegionMode = ImageLoader::kDontUseSharedRegion;
return;
}
@@ -2272,26 +3161,58 @@
if ( ::read(fd, firstPages, 8192) == 8192 ) {
dyld_cache_header* header = (dyld_cache_header*)firstPages;
if ( strcmp(header->magic, ARCH_CACHE_MAGIC) == 0 ) {
- const shared_file_mapping_np* mappings = (shared_file_mapping_np*)&firstPages[header->mappingOffset];
- const shared_file_mapping_np* const end = &mappings[header->mappingCount];
+ const dyld_cache_mapping_info* const fileMappingsStart = (dyld_cache_mapping_info*)&firstPages[header->mappingOffset];
+ const dyld_cache_mapping_info* const fileMappingsEnd = &fileMappingsStart[header->mappingCount];
+ shared_file_mapping_np mappings[header->mappingCount+1]; // add room for code-sig
+ unsigned int mappingCount = header->mappingCount;
+ int codeSignatureMappingIndex = -1;
+ 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
+ uint32_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 ) {
+ int linkeditMapping = mappingCount-1;
+ codeSignatureMappingIndex = mappingCount++;
+ mappings[codeSignatureMappingIndex].sfm_address = mappings[linkeditMapping].sfm_address + mappings[linkeditMapping].sfm_size;
+ mappings[codeSignatureMappingIndex].sfm_size = (signatureSize+4095) & (-4096);
+ mappings[codeSignatureMappingIndex].sfm_file_offset = header->codeSignatureOffset;
+ mappings[codeSignatureMappingIndex].sfm_max_prot = VM_PROT_READ;
+ mappings[codeSignatureMappingIndex].sfm_init_prot = VM_PROT_READ;
}
}
+#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 ( stat("/usr/lib/libSystem.B.dylib", &stat_buf) == 0 ) {
+ 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) {
@@ -2302,16 +3223,53 @@
}
}
if ( !sSharedCacheIgnoreInodeAndTimeStamp && !foundLibSystem ) {
- dyld::log("dyld: shared cached file was build against a different libSystem.dylib, ignoring cache\n");
+ 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 ( 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*)&firstPages[header->mappingOffset];
- if (_shared_region_map_np(fd, header->mappingCount, mappings) == 0) {
- // sucessfully mapped cache into shared region
+ long cacheSlide = 0;
+ void* slideInfo = NULL;
+ uint32_t slideInfoSize = 0;
+ // check if shared cache contains slid info
+ if ( header->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*)(long)(mappings[readOnlyMappingIndex].sfm_address + (header->slideInfoOffset - mappings[readOnlyMappingIndex].sfm_file_offset));
+ slideInfoSize = header->slideInfoSize;
+ // 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 (_shared_region_map_and_slide_np(fd, mappingCount, mappings, codeSignatureMappingIndex, 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::log("sSharedCache=%p sSharedCacheSlide=0x%08lX\n", sSharedCache, sSharedCacheSlide);
+ // if cache has a uuid, copy it
+ if ( header->mappingOffset >= 0x68 ) {
+ memcpy(dyld::gProcessInfo->sharedCacheUUID, header->uuid, 16);
+ }
+ }
+ else {
+ if ( gLinkContext.verboseMapping )
+ dyld::log("dyld: shared cached file could not be mapped\n");
}
}
}
@@ -2339,45 +3297,66 @@
// 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;
if ( gLinkContext.verboseMapping ) {
if ( gLinkContext.sharedRegionMode == ImageLoader::kUseSharedRegion )
- dyld::log("dyld: Mapping shared cache from %s" DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME "\n", sSharedCacheDir);
+ dyld::log("dyld: Mapping shared cache from %s/" DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME "\n", sSharedCacheDir);
else if ( gLinkContext.sharedRegionMode == ImageLoader::kUsePrivateSharedRegion )
- dyld::log("dyld: Mapping private shared cache from %s" DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME "\n", sSharedCacheDir);
- }
- const shared_file_mapping_np* const end = &start[dyld_shared_cache_ranges.sharedRegionsCount];
+ dyld::log("dyld: Mapping private shared cache from %s/" DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME "\n", sSharedCacheDir);
+ }
+ const dyld_cache_mapping_info* 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;
+ 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->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);
+ 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->sfm_init_prot == (VM_PROT_READ|VM_PROT_EXECUTE)) && ((p->sfm_address & 0xF0000000) == 0xA0000000) ) {
- if ( p->sfm_size != 0 ) {
+ 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->sfm_address, p->sfm_size, false, prot);
+ 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->sfm_address,
- p->sfm_address+p->sfm_size-1,
+ 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 ) {
+ // list the code blob
+ dyld_cache_header* header = (dyld_cache_header*)sSharedCache;
+ uint32_t signatureSize = header->codeSignatureSize;
+ // zero size in header means signature runs to end-of-file
+ if ( signatureSize == 0 ) {
+ struct stat stat_buf;
+ 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 __IPHONE_OS_VERSION_MIN_REQUIRED
+ // check for file that enables dyld shared cache dylibs to be overridden
+ struct stat enableStatBuf;
+ sDylibsOverrideCache = ( my_stat(IPHONE_DYLD_SHARED_CACHE_DIR "enable-dylibs-to-override-cache", &enableStatBuf) == 0 );
+#endif
}
}
#endif // #if DYLD_SHARED_CACHE_SUPPORT
@@ -2404,8 +3383,8 @@
context.mustBeBundle = true;
context.mustBeDylib = false;
context.canBePIE = false;
- context.origin = false;
- context.rpath = false;
+ context.origin = NULL;
+ context.rpath = NULL;
return loadPhase6(file.getFileDescriptor(), stat_buf, image->getPath(), context);
}
@@ -2491,10 +3470,19 @@
dyld::log("dyld: %s\n", message);
setErrorMessage(message);
uintptr_t terminationFlags = 0;
- if ( !gLinkContext.startedInitializingMainExecutable )
+ if ( !gLinkContext.startedInitializingMainExecutable )
terminationFlags = 1;
setAlImageInfosHalt(error_string, terminationFlags);
dyld_fatal_error(error_string);
+}
+
+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;
}
@@ -2537,7 +3525,6 @@
}
-#if COMPRESSED_DYLD_INFO_SUPPORT
uintptr_t fastBindLazySymbol(ImageLoader** imageLoaderCache, uintptr_t lazyBindingInfoOffset)
{
uintptr_t result = 0;
@@ -2554,7 +3541,9 @@
// bind lazy pointer and return it
try {
- result = (*imageLoaderCache)->doBindFastLazySymbol(lazyBindingInfoOffset, gLinkContext);
+ result = (*imageLoaderCache)->doBindFastLazySymbol(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);
@@ -2564,7 +3553,6 @@
// return target address to glue which jumps to it with real parameters restored
return result;
}
-#endif // COMPRESSED_DYLD_INFO_SUPPORT
@@ -2684,14 +3672,19 @@
// 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 )
@@ -2766,14 +3759,18 @@
gLinkContext.removeImage = &removeImage;
gLinkContext.registerDOFs = ®isterDOFs;
gLinkContext.clearAllDepths = &clearAllDepths;
+ gLinkContext.printAllDepths = &printAllDepths;
gLinkContext.imageCount = &imageCount;
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;
gLinkContext.bindingOptions = ImageLoader::kBindingNone;
gLinkContext.argc = argc;
gLinkContext.argv = argv;
@@ -2790,21 +3787,6 @@
gLinkContext.prebindUsage = ImageLoader::kUseAllPrebinding;
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;
- }
- return false;
-}
-#endif
#if __LP64__
@@ -2851,8 +3833,71 @@
return false;
}
-
-
+
+#if SUPPORT_VERSIONED_PATHS
+//
+// 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)
+{
+ // open file (automagically closed when this function exits)
+ FileOpener file(dylibPath);
+
+ if ( file.getFileDescriptor() == -1 )
+ return false;
+
+ uint8_t firstPage[4096];
+ 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;
+ }
+ }
+
+ // check mach-o header
+ const mach_header* mh = (mach_header*)firstPage;
+ 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()
{
@@ -2860,14 +3905,13 @@
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)
{
// add to list of known images. This did not happen at creation time for bundles
if ( image->isBundle() && !image->isLinked() )
@@ -2879,7 +3923,7 @@
// process images
try {
- image->link(gLinkContext, forceLazysBound, false, loaderRPaths);
+ image->link(gLinkContext, forceLazysBound, false, neverUnload, loaderRPaths);
}
catch (const char* msg) {
garbageCollectImages();
@@ -2891,33 +3935,105 @@
void runInitializers(ImageLoader* image)
{
// do bottom up initialization
- image->runInitializers(gLinkContext);
-}
-
+ ImageLoader::InitializerTimingList initializerTimes[sAllImages.size()];
+ 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);
- ImageLoader::deleteImage(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->markedUsedRecursive(sDynamicReferences);
+ }
+ }
+
+ // collect phase: build array of images not marked in-use
+ ImageLoader* deadImages[sAllImages.size()];
+ unsigned deadCount = 0;
+ unsigned i = 0;
+ for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
+ ImageLoader* image = *it;
+ if ( ! image->isMarkedInUse() ) {
+ deadImages[i++] = image;
+ if (gLogAPIs) dyld::log("dlclose(), found unused image %p %s\n", image, image->getShortName());
+ ++deadCount;
+ }
+ }
+
+ // collect phase: run termination routines for images not marked in-use
+ // TO DO: When libc has cxa_finalize() that takes array of images, pass deadImages[] instead of the for loop here
+ for (unsigned i=0; i < deadCount; ++i) {
+ ImageLoader* image = deadImages[i];
+ try {
+ if (gLogAPIs) dyld::log("dlclose(), running terminators for %p %s\n", image, image->getShortName());
+ runImageTerminators(image);
+ }
+ catch (const char* msg) {
+ dyld::warn("problem running terminators for image: %s\n", msg);
+ }
+ }
+
+ // 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);
+ }
}
- catch (const char* msg) {
- dyld::warn("problem deleting image: %s\n", msg);
- }
- mightBeUnreferencedImages = true;
- break;
- }
- }
- }
+ }
+ } while ( mightBeMore );
+ } while (sRedo);
+ sDoingGC = false;
+
//printAllImages();
+
}
@@ -2937,7 +4053,7 @@
try {
if ( image->isBundle() )
sBundleBeingLoaded = image; // hack
- image->link(gLinkContext, false, true, loaderRPaths);
+ image->link(gLinkContext, false, true, false, loaderRPaths);
}
catch (const char* msg) {
preflight_finally(image);
@@ -2963,12 +4079,238 @@
context.origin = NULL; // can't use @loader_path with DYLD_INSERT_LIBRARIES
context.rpath = NULL;
image = load(path, context);
- image->setNeverUnload();
+ }
+ catch (const char* msg) {
+ halt(dyld::mkstringf("could not load inserted library '%s' because %s\n", path, msg));
}
catch (...) {
- halt(dyld::mkstringf("could not load inserted library: %s\n", path));
- }
-}
+ halt(dyld::mkstringf("could not load inserted library '%s'\n", path));
+ }
+}
+
+static bool processRestricted(const macho_header* mainExecutableMH)
+{
+#if __MAC_OS_X_VERSION_MIN_REQUIRED
+ // ask kernel if code signature of program makes it restricted
+ uint32_t flags;
+ if ( csops(0, CS_OPS_STATUS, &flags, sizeof(flags)) != -1 ) {
+ if ( flags & CS_ENFORCEMENT ) {
+ gLinkContext.codeSigningEnforced = true;
+ }
+ }
+ if (flags & CS_RESTRICT) {
+ sRestrictedReason = restrictedByEntitlements;
+ return true;
+ }
+#else
+ gLinkContext.codeSigningEnforced = true;
+#endif
+
+ // all processes with setuid or setgid bit set are restricted
+ if ( issetugid() ) {
+ sRestrictedReason = restrictedBySetGUid;
+ return true;
+ }
+
+ // <rdar://problem/13158444&13245742> Respect __RESTRICT,__restrict section for root processes
+ if ( hasRestrictedSegment(mainExecutableMH) ) {
+ // existence of __RESTRICT/__restrict section make process restricted
+ sRestrictedReason = restrictedBySegment;
+ return true;
+ }
+ return false;
+}
+
+
+bool processIsRestricted()
+{
+ return sProcessIsRestricted;
+}
+
+
+// <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);
+ }
+}
+
+#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 = {
+ 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
+};
+
+__attribute__((noinline))
+static uintptr_t useSimulatorDyld(int fd, const macho_header* mainExecutableMH, const char* dyldPath,
+ int argc, const char* argv[], const char* envp[], const char* apple[], uintptr_t* startGlue)
+{
+ *startGlue = 0;
+
+ // verify simulator dyld file is owned by root
+ struct stat sb;
+ if ( fstat(fd, &sb) == -1 )
+ return 0;
+ if ( sb.st_uid != 0 )
+ return 0;
+
+ // read first page of dyld file
+ uint8_t firstPage[4096];
+ if ( pread(fd, firstPage, 4096, 0) != 4096 )
+ return 0;
+
+ // 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 0;
+ // re-read buffer from start of mach-o slice in fat file
+ if ( pread(fd, firstPage, 4096, fileOffset) != 4096 )
+ return 0;
+ }
+ else if ( !isCompatibleMachO(firstPage, dyldPath) ) {
+ return 0;
+ }
+
+ // calculate total size of dyld segments
+ const macho_header* mh = (const macho_header*)firstPage;
+ uintptr_t mappingSize = 0;
+ uintptr_t preferredLoadAddress = 0;
+ 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:
+ {
+ struct macho_segment_command* seg = (struct macho_segment_command*)cmd;
+ mappingSize += seg->vmsize;
+ if ( seg->fileoff == 0 )
+ preferredLoadAddress = seg->vmaddr;
+ }
+ break;
+ }
+ cmd = (const struct load_command*)(((char*)cmd)+cmd->cmdsize);
+ }
+
+ // reserve space, then mmap each segment
+ vm_address_t loadAddress = 0;
+ uintptr_t entry = 0;
+ if ( ::vm_allocate(mach_task_self(), &loadAddress, mappingSize, VM_FLAGS_ANYWHERE) != 0 )
+ return 0;
+ cmd = cmds;
+ struct linkedit_data_command* codeSigCmd = 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 0;
+ }
+ break;
+ case LC_UNIXTHREAD:
+ {
+ #if __i386__
+ const i386_thread_state_t* registers = (i386_thread_state_t*)(((char*)cmd) + 16);
+ entry = (registers->__eip + loadAddress - preferredLoadAddress);
+ #elif __x86_64__
+ const x86_thread_state64_t* registers = (x86_thread_state64_t*)(((char*)cmd) + 16);
+ entry = (registers->__rip + loadAddress - preferredLoadAddress);
+ #endif
+ }
+ break;
+ case LC_CODE_SIGNATURE:
+ codeSigCmd = (struct linkedit_data_command*)cmd;
+ break;
+ }
+ cmd = (const struct load_command*)(((char*)cmd)+cmd->cmdsize);
+ }
+
+ if ( codeSigCmd != NULL ) {
+ 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, &siginfo);
+ if ( result == -1 ) {
+ if ( (errno == EPERM) || (errno == EBADEXEC) )
+ return 0;
+ }
+ }
+ close(fd);
+
+ // 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);
+
+ // 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;
+ return (*newDyld)(argc, argv, envp, apple, mainExecutableMH, (macho_header*)loadAddress,
+ loadAddress - preferredLoadAddress,
+ &sSysCalls, startGlue);
+}
+#endif
+
//
// Entry point for dyld. The kernel loads dyld and jumps to __dyld_start which
@@ -2977,8 +4319,31 @@
// Returns address of main() in target program which __dyld_start jumps to
//
uintptr_t
-_main(const macho_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 ) {
+ // 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 ) {
+ result = useSimulatorDyld(fd, mainExecutableMH, simDyldPath, argc, argv, envp, apple, startGlue);
+ if ( !result && (*startGlue == 0) )
+ halt("problem loading iOS simulator dyld");
+ return result;
+ }
+ }
+#endif
+
+ CRSetCrashLogMessage("dyld: launch started");
#ifdef ALTERNATIVE_LOGFILE
sLogfile = open(ALTERNATIVE_LOGFILE, O_WRONLY | O_CREAT | O_APPEND);
if ( sLogfile == -1 ) {
@@ -2986,22 +4351,36 @@
dyld::log("error opening alternate log file %s, errno = %d\n", ALTERNATIVE_LOGFILE, errno);
}
#endif
-
+
+#if LOG_BINDINGS
+ char bindingsLogPath[256];
+
+ const char* shortProgName = "unknown";
+ if ( argc > 0 ) {
+ shortProgName = strrchr(argv[0], '/');
+ if ( shortProgName == NULL )
+ shortProgName = argv[0];
+ else
+ ++shortProgName;
+ }
+ mysprintf(bindingsLogPath, "/tmp/bindings/%d-%s", getpid(), shortProgName);
+ sBindingsLogfile = open(bindingsLogPath, O_WRONLY | O_CREAT, 0666);
+ if ( sBindingsLogfile == -1 ) {
+ ::mkdir("/tmp/bindings", 0777);
+ sBindingsLogfile = open(bindingsLogPath, O_WRONLY | O_CREAT, 0666);
+ }
+ //dyld::log("open(%s) => %d, errno = %d\n", bindingsLogPath, sBindingsLogfile, errno);
+#endif
setContext(mainExecutableMH, argc, argv, envp, apple);
// Pickup the pointer to the exec path.
+ sExecPath = _simple_getenv(apple, "executable_path");
+
+ // <rdar://problem/13868260> Remove interim apple[0] transition code from dyld
+ if (!sExecPath) sExecPath = apple[0];
+
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
if ( sExecPath[0] != '/' ) {
// have relative path, use cwd to make absolute
char cwdbuff[MAXPATHLEN];
@@ -3014,15 +4393,24 @@
sExecPath = s;
}
}
- uintptr_t result = 0;
- sMainExecutableMachHeader = mainExecutableMH;
- sProcessIsRestricted = issetugid();
- if ( geteuid() != 0 ) {
- // if we are not root, see if the binary is requesting restricting the use of DYLD_ env vars.
- sProcessIsRestricted |= hasRestrictedSegment(mainExecutableMH);
- }
- if ( sProcessIsRestricted )
+ // Remember short name of process for later logging
+ sExecShortName = ::strrchr(sExecPath, '/');
+ if ( sExecShortName != NULL )
+ ++sExecShortName;
+ else
+ sExecShortName = sExecPath;
+ sProcessIsRestricted = processRestricted(mainExecutableMH);
+ if ( sProcessIsRestricted ) {
+#if SUPPORT_LC_DYLD_ENVIRONMENT
+ checkLoadCommandEnvironmentVariables();
+#if SUPPORT_VERSIONED_PATHS
+ checkVersionedPaths();
+#endif
+#endif
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 )
@@ -3032,6 +4420,7 @@
getHostInfo();
// 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(INITIAL_IMAGE_COUNT);
sImageRoots.reserve(16);
@@ -3042,15 +4431,22 @@
#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_all_image_infos.systemOrderFlag);
-#endif
-
+ WAIT_FOR_SYSTEM_ORDER_HANDSHAKE(dyld::gProcessInfo->systemOrderFlag);
+#endif
+
+
try {
+ // add dyld itself to UUID list
+ addDyldImageToUUIDList();
+ if ( sProcessIsRestricted )
+ CRSetCrashLogMessage("dyld: launch, loading dependent libraries, ignoring DYLD_* env vars");
+ else
+ CRSetCrashLogMessage("dyld: launch, loading dependent libraries");
// instantiate ImageLoader for main executable
sMainExecutable = instantiateFromLoadedImage(mainExecutableMH, mainExecutableSlide, sExecPath);
- sMainExecutable->setNeverUnload();
gLinkContext.mainExecutable = sMainExecutable;
gLinkContext.processIsRestricted = sProcessIsRestricted;
+ gLinkContext.mainExecutableCodeSigned = hasCodeSignatureLoadCommand(mainExecutableMH);
// load shared cache
checkSharedRegionDisable();
#if DYLD_SHARED_CACHE_SUPPORT
@@ -3068,13 +4464,12 @@
// link main executable
gLinkContext.linkingMainExecutable = true;
- link(sMainExecutable, sEnv.DYLD_BIND_AT_LAUNCH, ImageLoader::RPathChain(NULL, NULL));
- gLinkContext.linkingMainExecutable = false;
+ link(sMainExecutable, sEnv.DYLD_BIND_AT_LAUNCH, true, ImageLoader::RPathChain(NULL, NULL));
+ 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
@@ -3082,17 +4477,47 @@
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));
+ image->setNeverUnloadRecursive();
+ // only INSERTED libraries can interpose
+ image->registerInterposing();
+ }
+ }
+ // 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);
+
+ 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(...) {
@@ -3106,14 +4531,14 @@
sLogfile = STDERR_FILENO;
}
#endif
+ CRSetCrashLogMessage(NULL);
return result;
}
-
-}; // namespace
-
-
-
+} // namespace
+
+
+