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--- dyld/dyld-46.9/src/dyldAPIsInLibSystem.cpp
+++ dyld/dyld-421.2/src/dyldAPIsInLibSystem.cpp
@@ -1,6 +1,6 @@
/* -*- mode: C++; c-basic-offset: 4; tab-width: 4 -*-
*
- * Copyright (c) 2004-2005 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2004-2012 Apple Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
@@ -24,12 +24,65 @@
#include <stddef.h>
#include <string.h>
+#include <malloc/malloc.h>
+#include <sys/mman.h>
+
#include <crt_externs.h>
-
+#include <Availability.h>
+#include <vproc_priv.h>
+
+#include <dirent.h>
+#include <sys/stat.h>
+
+#include "mach-o/dyld_images.h"
#include "mach-o/dyld.h"
#include "mach-o/dyld_priv.h"
-
+#include "dyld_cache_format.h"
+
+#include "ImageLoader.h"
#include "dyldLock.h"
+#include "start_glue.h"
+
+extern "C" int __cxa_atexit(void (*func)(void *), void *arg, void *dso);
+extern "C" void __cxa_finalize(const void *dso);
+extern "C" void __cxa_finalize_ranges(const struct __cxa_range_t ranges[], int count);
+
+
+#ifndef LC_VERSION_MIN_MACOSX
+ #define LC_VERSION_MIN_MACOSX 0x24
+ struct version_min_command {
+ uint32_t cmd; /* LC_VERSION_MIN_MACOSX or
+ LC_VERSION_MIN_IPHONEOS */
+ uint32_t cmdsize; /* sizeof(struct min_version_command) */
+ uint32_t version; /* X.Y.Z is encoded in nibbles xxxx.yy.zz */
+ uint32_t sdk; /* X.Y.Z is encoded in nibbles xxxx.yy.zz */
+ };
+#endif
+
+#ifndef LC_VERSION_MIN_IPHONEOS
+ #define LC_VERSION_MIN_IPHONEOS 0x25
+#endif
+
+#ifndef LC_VERSION_MIN_TVOS
+ #define LC_VERSION_MIN_TVOS 0x2F
+#endif
+
+#ifndef LC_VERSION_MIN_WATCHOS
+ #define LC_VERSION_MIN_WATCHOS 0x30
+#endif
+
+
+#ifndef LC_LOAD_UPWARD_DYLIB
+ #define LC_LOAD_UPWARD_DYLIB (0x23|LC_REQ_DYLD) /* load of dylib whose initializers run later */
+#endif
+
+
+// deprecated APIs are still availble on Mac OS X, but not on iPhone OS
+#if __IPHONE_OS_VERSION_MIN_REQUIRED
+ #define DEPRECATED_APIS_SUPPORTED 0
+#else
+ #define DEPRECATED_APIS_SUPPORTED 1
+#endif
/*
* names_match() takes an install_name from an LC_LOAD_DYLIB command and a
@@ -40,10 +93,10 @@
static
bool
names_match(
-char *install_name,
+const char *install_name,
const char* libraryName)
{
- char *basename;
+ const char *basename;
unsigned long n;
/*
@@ -64,7 +117,7 @@
* of the -framework cases.
*/
if(strcmp(basename, libraryName) == 0)
- return(TRUE);
+ return true;
/*
* Now check the base name for "lib" if so proceed to check for the
@@ -74,36 +127,39 @@
n = strlen(libraryName);
if(strncmp(basename+3, libraryName, n) == 0){
if(strncmp(basename+3+n, ".dylib", 6) == 0)
- return(TRUE);
+ return true;
if(basename[3+n] == '.' &&
basename[3+n+1] != '\0' &&
strncmp(basename+3+n+2, ".dylib", 6) == 0)
- return(TRUE);
+ return true;
}
}
- return(FALSE);
-}
+ return false;
+}
+
+#if DEPRECATED_APIS_SUPPORTED
void NSInstallLinkEditErrorHandlers(
const NSLinkEditErrorHandlers* handlers)
{
- DYLD_WRITER_LOCK_THIS_BLOCK;
- static void (*p)(
- void (*undefined)(const char* symbol_name),
- NSModule (*multiple)(NSSymbol s, NSModule old, NSModule newhandler),
- void (*linkEdit)(NSLinkEditErrors c, int errorNumber,
- const char* fileName, const char* errorString)) = NULL;
+ DYLD_LOCK_THIS_BLOCK;
+ typedef void (*ucallback_t)(const char* symbol_name);
+ typedef NSModule (*mcallback_t)(NSSymbol s, NSModule old, NSModule newhandler);
+ typedef void (*lcallback_t)(NSLinkEditErrors c, int errorNumber,
+ const char* fileName, const char* errorString);
+ static void (*p)(ucallback_t undefined, mcallback_t multiple, lcallback_t linkEdit) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_install_handlers", (void**)&p);
- p(handlers->undefined, handlers->multiple, handlers->linkEdit);
+ mcallback_t m = handlers->multiple;
+ p(handlers->undefined, m, handlers->linkEdit);
}
const char*
NSNameOfModule(
NSModule module)
{
- DYLD_READER_LOCK_THIS_BLOCK;
+ DYLD_LOCK_THIS_BLOCK;
static const char* (*p)(NSModule module) = NULL;
if(p == NULL)
@@ -115,7 +171,7 @@
NSLibraryNameForModule(
NSModule module)
{
- DYLD_READER_LOCK_THIS_BLOCK;
+ DYLD_LOCK_THIS_BLOCK;
static const char* (*p)(NSModule module) = NULL;
if(p == NULL)
@@ -127,7 +183,7 @@
NSIsSymbolNameDefined(
const char* symbolName)
{
- DYLD_READER_LOCK_THIS_BLOCK;
+ DYLD_LOCK_THIS_BLOCK;
static bool (*p)(const char* symbolName) = NULL;
if(p == NULL)
@@ -140,7 +196,7 @@
const char* symbolName,
const char* libraryNameHint)
{
- DYLD_READER_LOCK_THIS_BLOCK;
+ DYLD_LOCK_THIS_BLOCK;
static bool (*p)(const char* symbolName,
const char* libraryNameHint) = NULL;
@@ -154,7 +210,7 @@
const struct mach_header *image,
const char* symbolName)
{
- DYLD_READER_LOCK_THIS_BLOCK;
+ DYLD_LOCK_THIS_BLOCK;
static bool (*p)(const struct mach_header *image,
const char* symbolName) = NULL;
@@ -167,7 +223,7 @@
NSLookupAndBindSymbol(
const char* symbolName)
{
- DYLD_WRITER_LOCK_THIS_BLOCK;
+ DYLD_LOCK_THIS_BLOCK;
static NSSymbol (*p)(const char* symbolName) = NULL;
if(p == NULL)
@@ -180,7 +236,7 @@
const char* symbolName,
const char* libraryNameHint)
{
- DYLD_WRITER_LOCK_THIS_BLOCK;
+ DYLD_LOCK_THIS_BLOCK;
static NSSymbol (*p)(const char* symbolName,
const char* libraryNameHint) = NULL;
@@ -194,7 +250,7 @@
NSModule module,
const char* symbolName)
{
- DYLD_READER_LOCK_THIS_BLOCK;
+ DYLD_LOCK_THIS_BLOCK;
static NSSymbol (*p)(NSModule module, const char* symbolName) = NULL;
if(p == NULL)
@@ -208,7 +264,7 @@
const char* symbolName,
uint32_t options)
{
- DYLD_READER_LOCK_THIS_BLOCK;
+ DYLD_LOCK_THIS_BLOCK;
static NSSymbol (*p)(const struct mach_header *image,
const char* symbolName,
uint32_t options) = NULL;
@@ -222,7 +278,7 @@
NSNameOfSymbol(
NSSymbol symbol)
{
- DYLD_READER_LOCK_THIS_BLOCK;
+ DYLD_LOCK_THIS_BLOCK;
static char * (*p)(NSSymbol symbol) = NULL;
if(p == NULL)
@@ -234,7 +290,7 @@
NSAddressOfSymbol(
NSSymbol symbol)
{
- DYLD_READER_LOCK_THIS_BLOCK;
+ DYLD_LOCK_THIS_BLOCK;
static void * (*p)(NSSymbol symbol) = NULL;
if(p == NULL)
@@ -246,7 +302,7 @@
NSModuleForSymbol(
NSSymbol symbol)
{
- DYLD_READER_LOCK_THIS_BLOCK;
+ DYLD_LOCK_THIS_BLOCK;
static NSModule (*p)(NSSymbol symbol) = NULL;
if(p == NULL)
@@ -258,7 +314,7 @@
NSAddLibrary(
const char* pathName)
{
- DYLD_WRITER_LOCK_THIS_BLOCK;
+ DYLD_LOCK_THIS_BLOCK;
static bool (*p)(const char* pathName) = NULL;
if(p == NULL)
@@ -270,7 +326,7 @@
NSAddLibraryWithSearching(
const char* pathName)
{
- DYLD_WRITER_LOCK_THIS_BLOCK;
+ DYLD_LOCK_THIS_BLOCK;
static bool (*p)(const char* pathName) = NULL;
if(p == NULL)
@@ -283,7 +339,7 @@
const char* image_name,
uint32_t options)
{
- DYLD_WRITER_LOCK_THIS_BLOCK;
+ DYLD_LOCK_THIS_BLOCK;
static const struct mach_header * (*p)(const char* image_name,
uint32_t options) = NULL;
@@ -291,6 +347,7 @@
_dyld_func_lookup("__dyld_NSAddImage", (void**)&p);
return(p(image_name, options));
}
+#endif // DEPRECATED_APIS_SUPPORTED
/*
* This routine returns the current version of the named shared library the
@@ -303,41 +360,35 @@
* and not a list of current versions that dependent libraries and bundles the
* program is using were built with.
*/
-int32_t
-NSVersionOfLinkTimeLibrary(
-const char* libraryName)
-{
- unsigned long i;
- struct load_command *load_commands, *lc;
- struct dylib_command *dl;
- char *install_name;
-#ifndef __OPENSTEP__
- static struct mach_header *mh = NULL;
- if(mh == NULL)
+int32_t NSVersionOfLinkTimeLibrary(const char* libraryName)
+{
+ // Lazily call _NSGetMachExecuteHeader() and cache result
+#if __LP64__
+ static mach_header_64* mh = NULL;
+#else
+ static mach_header* mh = NULL;
+#endif
+ if ( mh == NULL )
mh = _NSGetMachExecuteHeader();
-#else /* defined(__OPENSTEP__) */
-#ifdef __DYNAMIC__
- static struct mach_header *mh = NULL;
- if(mh == NULL)
- _dyld_lookup_and_bind("__mh_execute_header", &mh, NULL);
+#if __LP64__
+ const load_command* lc = (load_command*)((char*)mh + sizeof(mach_header_64));
#else
- struct mach_header *mh;
- mh = (struct mach_header *)&_mh_execute_header;
-#endif
-#endif /* __OPENSTEP__ */
- load_commands = (struct load_command *)
- ((char *)mh + sizeof(struct mach_header));
- lc = load_commands;
- for(i = 0; i < mh->ncmds; i++){
- if(lc->cmd == LC_LOAD_DYLIB){
- dl = (struct dylib_command *)lc;
- install_name = (char *)dl + dl->dylib.name.offset;
- if(names_match(install_name, libraryName) == TRUE)
- return(dl->dylib.current_version);
- }
- lc = (struct load_command *)((char *)lc + lc->cmdsize);
- }
- return(-1);
+ const load_command* lc = (load_command*)((char*)mh + sizeof(mach_header));
+#endif
+ for(uint32_t i = 0; i < mh->ncmds; i++){
+ switch ( lc->cmd ) {
+ case LC_LOAD_DYLIB:
+ case LC_LOAD_WEAK_DYLIB:
+ case LC_LOAD_UPWARD_DYLIB:
+ const dylib_command* dl = (dylib_command *)lc;
+ const char* install_name = (char*)dl + dl->dylib.name.offset;
+ if ( names_match(install_name, libraryName) )
+ return dl->dylib.current_version;
+ break;
+ }
+ lc = (load_command*)((char*)lc + lc->cmdsize);
+ }
+ return (-1);
}
/*
@@ -347,37 +398,350 @@
* it would be "x" and with -framework Foo it would be "Foo"). If the program
* is not using the specified library it returns -1.
*/
-int32_t
-NSVersionOfRunTimeLibrary(
-const char* libraryName)
-{
- unsigned long i, j, n;
- char *install_name;
- struct load_command *load_commands, *lc;
- struct dylib_command *dl;
- const struct mach_header *mh;
-
- n = _dyld_image_count();
- for(i = 0; i < n; i++){
- mh = _dyld_get_image_header(i);
- if(mh->filetype != MH_DYLIB)
- continue;
- load_commands = (struct load_command *)
- ((char *)mh + sizeof(struct mach_header));
- lc = load_commands;
- for(j = 0; j < mh->ncmds; j++){
- if(lc->cmd == LC_ID_DYLIB){
- dl = (struct dylib_command *)lc;
- install_name = (char *)dl + dl->dylib.name.offset;
- if(names_match(install_name, libraryName) == TRUE)
- return(dl->dylib.current_version);
+int32_t NSVersionOfRunTimeLibrary(const char* libraryName)
+{
+ uint32_t n = _dyld_image_count();
+ for(uint32_t i = 0; i < n; i++){
+ const mach_header* mh = _dyld_get_image_header(i);
+ if ( mh == NULL )
+ continue;
+ if ( mh->filetype != MH_DYLIB )
+ continue;
+#if __LP64__
+ const load_command* lc = (load_command*)((char*)mh + sizeof(mach_header_64));
+#else
+ const load_command* lc = (load_command*)((char*)mh + sizeof(mach_header));
+#endif
+ for(uint32_t j = 0; j < mh->ncmds; j++){
+ if ( lc->cmd == LC_ID_DYLIB ) {
+ const dylib_command* dl = (dylib_command*)lc;
+ const char* install_name = (char *)dl + dl->dylib.name.offset;
+ if ( names_match(install_name, libraryName) )
+ return dl->dylib.current_version;
+ }
+ lc = (load_command*)((char*)lc + lc->cmdsize);
+ }
+ }
+ return (-1);
+}
+
+
+#define PACKED_VERSION(major, minor, tiny) ((((major) & 0xffff) << 16) | (((minor) & 0xff) << 8) | ((tiny) & 0xff))
+
+
+static bool getVersionLoadCommandInfo(const mach_header* mh, uint32_t* loadCommand, uint32_t* minOS, uint32_t* sdk)
+{
+ const load_command* startCmds = NULL;
+ if ( mh->magic == MH_MAGIC_64 )
+ startCmds = (load_command*)((char *)mh + sizeof(mach_header_64));
+ else if ( mh->magic == MH_MAGIC )
+ startCmds = (load_command*)((char *)mh + sizeof(mach_header));
+ else
+ return false; // not a mach-o file, or wrong endianness
+
+ const load_command* const cmdsEnd = (load_command*)((char*)startCmds + mh->sizeofcmds);
+ const load_command* cmd = startCmds;
+ for(uint32_t i = 0; i < mh->ncmds; ++i) {
+ const load_command* nextCmd = (load_command*)((char *)cmd + cmd->cmdsize);
+ if ( (cmd->cmdsize < 8) || (nextCmd > cmdsEnd) || (nextCmd < startCmds)) {
+ return 0;
}
- lc = (struct load_command *)((char *)lc + lc->cmdsize);
- }
- }
- return(-1);
-}
-
+ const version_min_command* versCmd;
+ switch ( cmd->cmd ) {
+ case LC_VERSION_MIN_IPHONEOS:
+ case LC_VERSION_MIN_MACOSX:
+ case LC_VERSION_MIN_TVOS:
+ case LC_VERSION_MIN_WATCHOS:
+ versCmd = (version_min_command*)cmd;
+ *loadCommand = versCmd->cmd;
+ *minOS = versCmd->version;
+ *sdk = versCmd->sdk;
+ return true;
+ }
+ cmd = nextCmd;
+ }
+ return false;
+}
+
+#if !__WATCH_OS_VERSION_MIN_REQUIRED && !__TV_OS_VERSION_MIN_REQUIRED
+static uint32_t deriveSDKVersFromDylibs(const mach_header* mh)
+{
+ const load_command* startCmds = NULL;
+ if ( mh->magic == MH_MAGIC_64 )
+ startCmds = (load_command*)((char *)mh + sizeof(mach_header_64));
+ else if ( mh->magic == MH_MAGIC )
+ startCmds = (load_command*)((char *)mh + sizeof(mach_header));
+ else
+ return 0; // not a mach-o file, or wrong endianness
+
+ const load_command* const cmdsEnd = (load_command*)((char*)startCmds + mh->sizeofcmds);
+ const dylib_command* dylibCmd;
+ const load_command* cmd = startCmds;
+ const char* dylibName;
+ #if __IPHONE_OS_VERSION_MIN_REQUIRED
+ uint32_t foundationVers = 0;
+ #else
+ uint32_t libSystemVers = 0;
+ #endif
+ for(uint32_t i = 0; i < mh->ncmds; ++i) {
+ const load_command* nextCmd = (load_command*)((char *)cmd + cmd->cmdsize);
+ // <rdar://problem/14381579&16050962> sanity check size of command
+ if ( (cmd->cmdsize < 8) || (nextCmd > cmdsEnd) || (nextCmd < startCmds)) {
+ return 0;
+ }
+ switch ( cmd->cmd ) {
+ case LC_LOAD_DYLIB:
+ case LC_LOAD_WEAK_DYLIB:
+ case LC_LOAD_UPWARD_DYLIB:
+ dylibCmd = (dylib_command*)cmd;
+ // sanity check dylib command layout
+ if ( dylibCmd->dylib.name.offset > cmd->cmdsize )
+ return 0;
+ dylibName = (char*)dylibCmd + dylibCmd->dylib.name.offset;
+ #if __IPHONE_OS_VERSION_MIN_REQUIRED
+ if ( strcmp(dylibName, "/System/Library/Frameworks/Foundation.framework/Foundation") == 0 )
+ foundationVers = dylibCmd->dylib.current_version;
+ #else
+ if ( strcmp(dylibName, "/usr/lib/libSystem.B.dylib") == 0 )
+ libSystemVers = dylibCmd->dylib.current_version;
+ #endif
+ break;
+ }
+ cmd = nextCmd;
+ }
+
+ struct DylibToOSMapping {
+ uint32_t dylibVersion;
+ uint32_t osVersion;
+ };
+
+ #if __IPHONE_OS_VERSION_MIN_REQUIRED
+ static const DylibToOSMapping foundationMapping[] = {
+ { PACKED_VERSION(678,24,0), DYLD_IOS_VERSION_2_0 },
+ { PACKED_VERSION(678,26,0), DYLD_IOS_VERSION_2_1 },
+ { PACKED_VERSION(678,29,0), DYLD_IOS_VERSION_2_2 },
+ { PACKED_VERSION(678,47,0), DYLD_IOS_VERSION_3_0 },
+ { PACKED_VERSION(678,51,0), DYLD_IOS_VERSION_3_1 },
+ { PACKED_VERSION(678,60,0), DYLD_IOS_VERSION_3_2 },
+ { PACKED_VERSION(751,32,0), DYLD_IOS_VERSION_4_0 },
+ { PACKED_VERSION(751,37,0), DYLD_IOS_VERSION_4_1 },
+ { PACKED_VERSION(751,49,0), DYLD_IOS_VERSION_4_2 },
+ { PACKED_VERSION(751,58,0), DYLD_IOS_VERSION_4_3 },
+ { PACKED_VERSION(881,0,0), DYLD_IOS_VERSION_5_0 },
+ { PACKED_VERSION(890,1,0), DYLD_IOS_VERSION_5_1 },
+ { PACKED_VERSION(992,0,0), DYLD_IOS_VERSION_6_0 },
+ { PACKED_VERSION(993,0,0), DYLD_IOS_VERSION_6_1 },
+ { PACKED_VERSION(1038,14,0),DYLD_IOS_VERSION_7_0 },
+ { PACKED_VERSION(0,0,0), DYLD_IOS_VERSION_7_0 }
+ // We don't need to expand this table because all recent
+ // binaries have LC_VERSION_MIN_ load command.
+ };
+
+ if ( foundationVers != 0 ) {
+ uint32_t lastOsVersion = 0;
+ for (const DylibToOSMapping* p=foundationMapping; ; ++p) {
+ if ( p->dylibVersion == 0 )
+ return p->osVersion;
+ if ( foundationVers < p->dylibVersion )
+ return lastOsVersion;
+ lastOsVersion = p->osVersion;
+ }
+ }
+
+ #else
+ // Note: versions are for the GM release. The last entry should
+ // always be zero. At the start of the next major version,
+ // a new last entry needs to be added and the previous zero
+ // updated to the GM dylib version.
+ static const DylibToOSMapping libSystemMapping[] = {
+ { PACKED_VERSION(88,1,3), DYLD_MACOSX_VERSION_10_4 },
+ { PACKED_VERSION(111,0,0), DYLD_MACOSX_VERSION_10_5 },
+ { PACKED_VERSION(123,0,0), DYLD_MACOSX_VERSION_10_6 },
+ { PACKED_VERSION(159,0,0), DYLD_MACOSX_VERSION_10_7 },
+ { PACKED_VERSION(169,3,0), DYLD_MACOSX_VERSION_10_8 },
+ { PACKED_VERSION(1197,0,0), DYLD_MACOSX_VERSION_10_9 },
+ { PACKED_VERSION(0,0,0), DYLD_MACOSX_VERSION_10_9 }
+ // We don't need to expand this table because all recent
+ // binaries have LC_VERSION_MIN_ load command.
+ };
+
+ if ( libSystemVers != 0 ) {
+ uint32_t lastOsVersion = 0;
+ for (const DylibToOSMapping* p=libSystemMapping; ; ++p) {
+ if ( p->dylibVersion == 0 )
+ return p->osVersion;
+ if ( libSystemVers < p->dylibVersion )
+ return lastOsVersion;
+ lastOsVersion = p->osVersion;
+ }
+ }
+ #endif
+ return 0;
+}
+#endif
+
+
+#if __WATCH_OS_VERSION_MIN_REQUIRED
+static uint32_t watchVersToIOSVers(uint32_t vers)
+{
+ return vers + 0x00070000;
+}
+
+uint32_t dyld_get_program_sdk_watch_os_version()
+{
+ const mach_header* mh = (mach_header*)_NSGetMachExecuteHeader();
+ uint32_t loadCommand;
+ uint32_t minOS;
+ uint32_t sdk;
+
+ if ( getVersionLoadCommandInfo(mh, &loadCommand, &minOS, &sdk) ) {
+ if ( loadCommand == LC_VERSION_MIN_WATCHOS )
+ return sdk;
+ }
+ return 0;
+}
+
+uint32_t dyld_get_program_min_watch_os_version()
+{
+ const mach_header* mh = (mach_header*)_NSGetMachExecuteHeader();
+ uint32_t loadCommand;
+ uint32_t minOS;
+ uint32_t sdk;
+
+ if ( getVersionLoadCommandInfo(mh, &loadCommand, &minOS, &sdk) ) {
+ if ( loadCommand == LC_VERSION_MIN_WATCHOS )
+ return minOS; // return raw minOS (not mapped to iOS version)
+ }
+ return 0;
+}
+
+#endif
+
+/*
+ * Returns the sdk version (encode as nibble XXXX.YY.ZZ) the
+ * specified binary was built against.
+ *
+ * First looks for LC_VERSION_MIN_* in binary and if sdk field is
+ * not zero, return that value.
+ * Otherwise, looks for the libSystem.B.dylib the binary linked
+ * against and uses a table to convert that to an sdk version.
+ */
+uint32_t dyld_get_sdk_version(const mach_header* mh)
+{
+ uint32_t loadCommand;
+ uint32_t minOS;
+ uint32_t sdk;
+
+ if ( getVersionLoadCommandInfo(mh, &loadCommand, &minOS, &sdk) ) {
+ switch (loadCommand) {
+#if __WATCH_OS_VERSION_MIN_REQUIRED
+ case LC_VERSION_MIN_WATCHOS:
+ // new binary. sdk version looks like "2.0" but API wants "9.0"
+ return watchVersToIOSVers(sdk);
+ case LC_VERSION_MIN_IPHONEOS:
+ // old binary. sdk matches API semantics so can return directly.
+ return sdk;
+#elif __TV_OS_VERSION_MIN_REQUIRED
+ case LC_VERSION_MIN_TVOS:
+ case LC_VERSION_MIN_IPHONEOS:
+ return sdk;
+#elif __IPHONE_OS_VERSION_MIN_REQUIRED
+ case LC_VERSION_MIN_IPHONEOS:
+ if ( sdk != 0 ) // old binaries might not have SDK set
+ return sdk;
+ break;
+#else
+ case LC_VERSION_MIN_MACOSX:
+ if ( sdk != 0 ) // old binaries might not have SDK set
+ return sdk;
+ break;
+#endif
+ }
+ }
+
+#if __WATCH_OS_VERSION_MIN_REQUIRED ||__TV_OS_VERSION_MIN_REQUIRED
+ // All WatchOS and tv OS binaries should have version load command.
+ return 0;
+#else
+ // MacOSX and iOS have old binaries without version load commmand.
+ return deriveSDKVersFromDylibs(mh);
+#endif
+}
+
+uint32_t dyld_get_program_sdk_version()
+{
+ return dyld_get_sdk_version((mach_header*)_NSGetMachExecuteHeader());
+}
+
+uint32_t dyld_get_min_os_version(const struct mach_header* mh)
+{
+ uint32_t loadCommand;
+ uint32_t minOS;
+ uint32_t sdk;
+
+ if ( getVersionLoadCommandInfo(mh, &loadCommand, &minOS, &sdk) ) {
+ switch (loadCommand) {
+#if __WATCH_OS_VERSION_MIN_REQUIRED
+ case LC_VERSION_MIN_WATCHOS:
+ // new binary. OS version looks like "2.0" but API wants "9.0"
+ return watchVersToIOSVers(minOS);
+ case LC_VERSION_MIN_IPHONEOS:
+ // old binary. OS matches API semantics so can return directly.
+ return minOS;
+#elif __TV_OS_VERSION_MIN_REQUIRED
+ case LC_VERSION_MIN_TVOS:
+ case LC_VERSION_MIN_IPHONEOS:
+ return minOS;
+#elif __IPHONE_OS_VERSION_MIN_REQUIRED
+ case LC_VERSION_MIN_IPHONEOS:
+ return minOS;
+#else
+ case LC_VERSION_MIN_MACOSX:
+ return minOS;
+#endif
+ }
+ }
+ return 0;
+}
+
+
+uint32_t dyld_get_program_min_os_version()
+{
+ return dyld_get_min_os_version((mach_header*)_NSGetMachExecuteHeader());
+}
+
+
+bool _dyld_get_image_uuid(const struct mach_header* mh, uuid_t uuid)
+{
+ const load_command* startCmds = NULL;
+ if ( mh->magic == MH_MAGIC_64 )
+ startCmds = (load_command*)((char *)mh + sizeof(mach_header_64));
+ else if ( mh->magic == MH_MAGIC )
+ startCmds = (load_command*)((char *)mh + sizeof(mach_header));
+ else
+ return false; // not a mach-o file, or wrong endianness
+
+ const load_command* const cmdsEnd = (load_command*)((char*)startCmds + mh->sizeofcmds);
+ const load_command* cmd = startCmds;
+ for(uint32_t i = 0; i < mh->ncmds; ++i) {
+ const load_command* nextCmd = (load_command*)((char *)cmd + cmd->cmdsize);
+ if ( (cmd->cmdsize < 8) || (nextCmd > cmdsEnd) || (nextCmd < startCmds)) {
+ return false;
+ }
+ if ( cmd->cmd == LC_UUID ) {
+ const uuid_command* uuidCmd = (uuid_command*)cmd;
+ memcpy(uuid, uuidCmd->uuid, 16);
+ return true;
+ }
+ cmd = nextCmd;
+ }
+ bzero(uuid, 16);
+ return false;
+}
+
+
+
+#if DEPRECATED_APIS_SUPPORTED
/*
* NSCreateObjectFileImageFromFile() creates an NSObjectFileImage for the
* specified file name if the file is a correct Mach-O file that can be loaded
@@ -390,7 +754,7 @@
const char* pathName,
NSObjectFileImage *objectFileImage)
{
- DYLD_WRITER_LOCK_THIS_BLOCK;
+ DYLD_LOCK_THIS_BLOCK;
static NSObjectFileImageReturnCode (*p)(const char*, NSObjectFileImage*) = NULL;
if(p == NULL)
@@ -412,7 +776,7 @@
size_t size,
NSObjectFileImage *objectFileImage)
{
- DYLD_WRITER_LOCK_THIS_BLOCK;
+ DYLD_LOCK_THIS_BLOCK;
static NSObjectFileImageReturnCode (*p)(const void*, size_t, NSObjectFileImage*) = NULL;
if(p == NULL)
@@ -420,6 +784,7 @@
return p(address, size, objectFileImage);
}
+#if OBSOLETE_DYLD_API
/*
* NSCreateCoreFileImageFromFile() creates an NSObjectFileImage for the
* specified core file name if the file is a correct Mach-O core file.
@@ -431,19 +796,20 @@
const char* pathName,
NSObjectFileImage *objectFileImage)
{
- DYLD_WRITER_LOCK_THIS_BLOCK;
+ DYLD_LOCK_THIS_BLOCK;
static NSObjectFileImageReturnCode (*p)(const char*, NSObjectFileImage*) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_NSCreateCoreFileImageFromFile", (void**)&p);
return p(pathName, objectFileImage);
}
+#endif
bool
NSDestroyObjectFileImage(
NSObjectFileImage objectFileImage)
{
- DYLD_WRITER_LOCK_THIS_BLOCK;
+ DYLD_LOCK_THIS_BLOCK;
static bool (*p)(NSObjectFileImage) = NULL;
if(p == NULL)
@@ -458,7 +824,7 @@
const char* moduleName,
uint32_t options)
{
- DYLD_WRITER_LOCK_THIS_BLOCK;
+ DYLD_LOCK_THIS_BLOCK;
static NSModule (*p)(NSObjectFileImage, const char*, unsigned long) = NULL;
if(p == NULL)
@@ -468,31 +834,6 @@
}
-/*
- * NSFindSectionAndOffsetInObjectFileImage() takes the specified imageOffset
- * into the specified ObjectFileImage and returns the segment/section name and
- * offset into that section of that imageOffset. Returns FALSE if the
- * imageOffset is not in any section. You can used the resulting sectionOffset
- * to index into the data returned by NSGetSectionDataInObjectFileImage.
- *
- * SPI: currently only used by ZeroLink to detect +load methods
- */
-bool
-NSFindSectionAndOffsetInObjectFileImage(
-NSObjectFileImage objectFileImage,
-unsigned long imageOffset,
-const char** segmentName, /* can be NULL */
-const char** sectionName, /* can be NULL */
-unsigned long* sectionOffset) /* can be NULL */
-{
- DYLD_READER_LOCK_THIS_BLOCK;
- static bool (*p)(NSObjectFileImage, unsigned long, const char**, const char**, unsigned long*) = NULL;
-
- if(p == NULL)
- _dyld_func_lookup("__dyld_NSFindSectionAndOffsetInObjectFileImage", (void**)&p);
-
- return p(objectFileImage, imageOffset, segmentName, sectionName, sectionOffset);
-}
/*
@@ -503,8 +844,8 @@
NSSymbolDefinitionCountInObjectFileImage(
NSObjectFileImage objectFileImage)
{
- DYLD_READER_LOCK_THIS_BLOCK;
- static unsigned long (*p)(NSObjectFileImage) = NULL;
+ DYLD_LOCK_THIS_BLOCK;
+ static uint32_t (*p)(NSObjectFileImage) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_NSSymbolDefinitionCountInObjectFileImage", (void**)&p);
@@ -523,7 +864,7 @@
NSObjectFileImage objectFileImage,
uint32_t ordinal)
{
- DYLD_READER_LOCK_THIS_BLOCK;
+ DYLD_LOCK_THIS_BLOCK;
static const char* (*p)(NSObjectFileImage, uint32_t) = NULL;
if(p == NULL)
@@ -540,8 +881,8 @@
NSSymbolReferenceCountInObjectFileImage(
NSObjectFileImage objectFileImage)
{
- DYLD_READER_LOCK_THIS_BLOCK;
- static unsigned long (*p)(NSObjectFileImage) = NULL;
+ DYLD_LOCK_THIS_BLOCK;
+ static uint32_t (*p)(NSObjectFileImage) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_NSSymbolReferenceCountInObjectFileImage", (void**)&p);
@@ -561,7 +902,7 @@
uint32_t ordinal,
bool *tentative_definition) /* can be NULL */
{
- DYLD_READER_LOCK_THIS_BLOCK;
+ DYLD_LOCK_THIS_BLOCK;
static const char* (*p)(NSObjectFileImage, uint32_t, bool*) = NULL;
if(p == NULL)
@@ -579,7 +920,7 @@
NSObjectFileImage objectFileImage,
const char* symbolName)
{
- DYLD_READER_LOCK_THIS_BLOCK;
+ DYLD_LOCK_THIS_BLOCK;
static bool (*p)(NSObjectFileImage, const char*) = NULL;
if(p == NULL)
@@ -602,7 +943,7 @@
const char* sectionName,
unsigned long *size) /* can be NULL */
{
- DYLD_READER_LOCK_THIS_BLOCK;
+ DYLD_LOCK_THIS_BLOCK;
static void* (*p)(NSObjectFileImage, const char*, const char*, unsigned long*) = NULL;
if(p == NULL)
@@ -611,24 +952,6 @@
return p(objectFileImage, segmentName, sectionName, size);
}
-/*
- * NSHasModInitObjectFileImage() returns TRUE if the NSObjectFileImage has any
- * module initialization sections and FALSE it it does not.
- *
- * SPI: currently only used by ZeroLink to detect C++ initializers
- */
-bool
-NSHasModInitObjectFileImage(
-NSObjectFileImage objectFileImage)
-{
- DYLD_READER_LOCK_THIS_BLOCK;
- static bool (*p)(NSObjectFileImage) = NULL;
-
- if(p == NULL)
- _dyld_func_lookup("__dyld_NSHasModInitObjectFileImage", (void**)&p);
-
- return p(objectFileImage);
-}
void
NSLinkEditError(
@@ -637,7 +960,7 @@
const char* *fileName,
const char* *errorString)
{
- DYLD_WRITER_LOCK_THIS_BLOCK;
+ DYLD_LOCK_THIS_BLOCK;
static void (*p)(NSLinkEditErrors *c,
int *errorNumber,
const char* *fileName,
@@ -654,7 +977,7 @@
NSModule module,
uint32_t options)
{
- DYLD_WRITER_LOCK_THIS_BLOCK;
+ DYLD_LOCK_THIS_BLOCK;
static bool (*p)(NSModule module, uint32_t options) = NULL;
if(p == NULL)
@@ -663,6 +986,7 @@
return p(module, options);
}
+#if OBSOLETE_DYLD_API
NSModule
NSReplaceModule(
NSModule moduleToReplace,
@@ -671,6 +995,10 @@
{
return(NULL);
}
+#endif
+
+
+#endif // DEPRECATED_APIS_SUPPORTED
/*
*_NSGetExecutablePath copies the path of the executable into the buffer and
@@ -686,7 +1014,7 @@
char *buf,
uint32_t *bufsize)
{
- DYLD_READER_LOCK_THIS_BLOCK;
+ DYLD_NO_LOCK_THIS_BLOCK;
static int (*p)(char *buf, uint32_t *bufsize) = NULL;
if(p == NULL)
@@ -694,13 +1022,14 @@
return(p(buf, bufsize));
}
+#if DEPRECATED_APIS_SUPPORTED
void
_dyld_lookup_and_bind(
const char* symbol_name,
void** address,
NSModule* module)
{
- DYLD_WRITER_LOCK_THIS_BLOCK;
+ DYLD_LOCK_THIS_BLOCK;
static void (*p)(const char*, void** , NSModule*) = NULL;
if(p == NULL)
@@ -715,7 +1044,7 @@
void** address,
NSModule* module)
{
- DYLD_WRITER_LOCK_THIS_BLOCK;
+ DYLD_LOCK_THIS_BLOCK;
static void (*p)(const char*, const char*, void**, NSModule*) = NULL;
if(p == NULL)
@@ -723,19 +1052,21 @@
p(symbol_name, library_name_hint, address, module);
}
+#if OBSOLETE_DYLD_API
void
_dyld_lookup_and_bind_objc(
const char* symbol_name,
void** address,
NSModule* module)
{
- DYLD_WRITER_LOCK_THIS_BLOCK;
+ DYLD_LOCK_THIS_BLOCK;
static void (*p)(const char* , void**, NSModule*) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_lookup_and_bind_objc", (void**)&p);
p(symbol_name, address, module);
}
+#endif
void
_dyld_lookup_and_bind_fully(
@@ -743,7 +1074,7 @@
void** address,
NSModule* module)
{
- DYLD_WRITER_LOCK_THIS_BLOCK;
+ DYLD_LOCK_THIS_BLOCK;
static void (*p)(const char*, void**, NSModule*) = NULL;
if(p == NULL)
@@ -755,13 +1086,14 @@
_dyld_bind_fully_image_containing_address(
const void* address)
{
- DYLD_WRITER_LOCK_THIS_BLOCK;
+ DYLD_LOCK_THIS_BLOCK;
static bool (*p)(const void*) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_bind_fully_image_containing_address", (void**)&p);
return p(address);
}
+#endif // DEPRECATED_APIS_SUPPORTED
/*
@@ -774,8 +1106,9 @@
_dyld_register_func_for_add_image(
void (*func)(const struct mach_header *mh, intptr_t vmaddr_slide))
{
- DYLD_WRITER_LOCK_THIS_BLOCK;
- static void (*p)(void (*func)(const struct mach_header *mh, intptr_t vmaddr_slide)) = NULL;
+ DYLD_LOCK_THIS_BLOCK;
+ typedef void (*callback_t)(const struct mach_header *mh, intptr_t vmaddr_slide);
+ static void (*p)(callback_t func) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_register_func_for_add_image", (void**)&p);
@@ -791,14 +1124,16 @@
_dyld_register_func_for_remove_image(
void (*func)(const struct mach_header *mh, intptr_t vmaddr_slide))
{
- DYLD_WRITER_LOCK_THIS_BLOCK;
- static void (*p)(void (*func)(const struct mach_header *mh, intptr_t vmaddr_slide)) = NULL;
+ DYLD_LOCK_THIS_BLOCK;
+ typedef void (*callback_t)(const struct mach_header *mh, intptr_t vmaddr_slide);
+ static void (*p)(callback_t func) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_register_func_for_remove_image", (void**)&p);
p(func);
}
+#if OBSOLETE_DYLD_API
/*
* _dyld_register_func_for_link_module registers the specified function to be
* called when a module is bound into the program. When this function is first
@@ -809,7 +1144,7 @@
_dyld_register_func_for_link_module(
void (*func)(NSModule module))
{
- DYLD_WRITER_LOCK_THIS_BLOCK;
+ DYLD_LOCK_THIS_BLOCK;
static void (*p)(void (*func)(NSModule module)) = NULL;
if(p == NULL)
@@ -825,7 +1160,7 @@
_dyld_register_func_for_unlink_module(
void (*func)(NSModule module))
{
- DYLD_WRITER_LOCK_THIS_BLOCK;
+ DYLD_LOCK_THIS_BLOCK;
static void (*p)(void (*func)(NSModule module)) = NULL;
if(p == NULL)
@@ -841,7 +1176,7 @@
_dyld_register_func_for_replace_module(
void (*func)(NSModule oldmodule, NSModule newmodule))
{
- DYLD_WRITER_LOCK_THIS_BLOCK;
+ DYLD_LOCK_THIS_BLOCK;
static void (*p)(void (*func)(NSModule oldmodule,
NSModule newmodule)) = NULL;
@@ -862,7 +1197,7 @@
void **objc_module,
unsigned long *size)
{
- DYLD_READER_LOCK_THIS_BLOCK;
+ DYLD_LOCK_THIS_BLOCK;
static void (*p)(NSModule module,
void **objc_module,
unsigned long *size) = NULL;
@@ -878,45 +1213,39 @@
* to be bound.
*/
void
-_dyld_bind_objc_module(
-const void* objc_module)
-{
- DYLD_READER_LOCK_THIS_BLOCK;
+_dyld_bind_objc_module(const void* objc_module)
+{
+ DYLD_LOCK_THIS_BLOCK;
static void (*p)(const void *objc_module) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_bind_objc_module", (void**)&p);
p(objc_module);
}
-
-
-#if __DYNAMIC__
+#endif
+
+#if DEPRECATED_APIS_SUPPORTED
bool
-_dyld_present(
-void)
-{
- // hmmm, this code is in libSystem.dylib, which is loaded by dyld...
+_dyld_present(void)
+{
+ // this function exists for compatiblity only
return true;
}
#endif
uint32_t
-_dyld_image_count(
-void)
+_dyld_image_count(void)
{
DYLD_NO_LOCK_THIS_BLOCK;
- static unsigned long (*p)(void) = NULL;
-
- if(_dyld_present() == 0)
- return(0);
+ static uint32_t (*p)(void) = NULL;
+
if(p == NULL)
_dyld_func_lookup("__dyld_image_count", (void**)&p);
return(p());
}
const struct mach_header *
-_dyld_get_image_header(
-uint32_t image_index)
+_dyld_get_image_header(uint32_t image_index)
{
DYLD_NO_LOCK_THIS_BLOCK;
static struct mach_header * (*p)(uint32_t image_index) = NULL;
@@ -927,8 +1256,7 @@
}
intptr_t
-_dyld_get_image_vmaddr_slide(
-uint32_t image_index)
+_dyld_get_image_vmaddr_slide(uint32_t image_index)
{
DYLD_NO_LOCK_THIS_BLOCK;
static unsigned long (*p)(uint32_t image_index) = NULL;
@@ -939,8 +1267,7 @@
}
const char*
-_dyld_get_image_name(
-uint32_t image_index)
+_dyld_get_image_name(uint32_t image_index)
{
DYLD_NO_LOCK_THIS_BLOCK;
static const char* (*p)(uint32_t image_index) = NULL;
@@ -950,11 +1277,22 @@
return(p(image_index));
}
+// SPI in Mac OS X 10.6
+intptr_t _dyld_get_image_slide(const struct mach_header* mh)
+{
+ DYLD_NO_LOCK_THIS_BLOCK;
+ static intptr_t (*p)(const struct mach_header*) = NULL;
+
+ if(p == NULL)
+ _dyld_func_lookup("__dyld_get_image_slide", (void**)&p);
+ return(p(mh));
+}
+
+
bool
-_dyld_image_containing_address(
-const void* address)
-{
- DYLD_READER_LOCK_THIS_BLOCK;
+_dyld_image_containing_address(const void* address)
+{
+ DYLD_LOCK_THIS_BLOCK;
static bool (*p)(const void*) = NULL;
if(p == NULL)
@@ -966,7 +1304,7 @@
_dyld_get_image_header_containing_address(
const void* address)
{
- DYLD_READER_LOCK_THIS_BLOCK;
+ DYLD_LOCK_THIS_BLOCK;
static const struct mach_header * (*p)(const void*) = NULL;
if(p == NULL)
@@ -974,21 +1312,11 @@
return p(address);
}
-void _dyld_moninit(
-void (*monaddition)(char *lowpc, char *highpc))
-{
- DYLD_READER_LOCK_THIS_BLOCK;
- static void (*p)(void (*monaddition)(char *lowpc, char *highpc)) = NULL;
-
- if(p == NULL)
- _dyld_func_lookup("__dyld_moninit", (void**)&p);
- p(monaddition);
-}
-
-bool _dyld_launched_prebound(
-void)
-{
- DYLD_READER_LOCK_THIS_BLOCK;
+
+#if DEPRECATED_APIS_SUPPORTED
+bool _dyld_launched_prebound(void)
+{
+ DYLD_LOCK_THIS_BLOCK;
static bool (*p)(void) = NULL;
if(p == NULL)
@@ -996,16 +1324,16 @@
return(p());
}
-bool _dyld_all_twolevel_modules_prebound(
-void)
-{
- DYLD_READER_LOCK_THIS_BLOCK;
+bool _dyld_all_twolevel_modules_prebound(void)
+{
+ DYLD_LOCK_THIS_BLOCK;
static bool (*p)(void) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_all_twolevel_modules_prebound", (void**)&p);
return(p());
}
+#endif // DEPRECATED_APIS_SUPPORTED
#include <dlfcn.h>
@@ -1013,27 +1341,36 @@
#include <pthread.h>
#include <stdlib.h>
#include <mach-o/dyld.h>
-#include "dyldLock.h"
-#include "dyldLibSystemThreadHelpers.h"
+#include <servers/bootstrap.h>
+#include "dyldLibSystemInterface.h"
+
// pthread key used to access per-thread dlerror message
static pthread_key_t dlerrorPerThreadKey;
+static bool dlerrorPerThreadKeyInitialized = false;
// data kept per-thread
struct dlerrorPerThreadData
{
- uint32_t sizeAllocated;
+ size_t sizeAllocated;
char message[1];
};
// function called by dyld to get buffer to store dlerror message
-static char* getPerThreadBufferFor_dlerror(uint32_t sizeRequired)
-{
- const int size = (sizeRequired < 256) ? 256 : sizeRequired;
+static char* getPerThreadBufferFor_dlerror(size_t sizeRequired)
+{
+ // ok to create key lazily because this function is called within dyld lock, so there is no race condition
+ if (!dlerrorPerThreadKeyInitialized ) {
+ // create key and tell pthread package to call free() on any data associated with key if thread dies
+ pthread_key_create(&dlerrorPerThreadKey, &free);
+ dlerrorPerThreadKeyInitialized = true;
+ }
+
+ const size_t size = (sizeRequired < 256) ? 256 : sizeRequired;
dlerrorPerThreadData* data = (dlerrorPerThreadData*)pthread_getspecific(dlerrorPerThreadKey);
if ( data == NULL ) {
//int mallocSize = offsetof(dlerrorPerThreadData, message[size]);
- const int mallocSize = sizeof(dlerrorPerThreadData)+size;
+ const size_t mallocSize = sizeof(dlerrorPerThreadData)+size;
data = (dlerrorPerThreadData*)malloc(mallocSize);
data->sizeAllocated = size;
pthread_setspecific(dlerrorPerThreadKey, data);
@@ -1041,7 +1378,7 @@
else if ( data->sizeAllocated < sizeRequired ) {
free(data);
//int mallocSize = offsetof(dlerrorPerThreadData, message[size]);
- const int mallocSize = sizeof(dlerrorPerThreadData)+size;
+ const size_t mallocSize = sizeof(dlerrorPerThreadData)+size;
data = (dlerrorPerThreadData*)malloc(mallocSize);
data->sizeAllocated = size;
pthread_setspecific(dlerrorPerThreadKey, data);
@@ -1049,37 +1386,83 @@
return data->message;
}
-// that table passed to dyld containing thread helpers
-static dyld::ThreadingHelpers sThreadHelpers = { 1, &lockForLazyBinding, &unlockForLazyBinding, &getPerThreadBufferFor_dlerror };
+// <rdar://problem/10595338> dlerror buffer leak
+// Only allocate buffer if an actual error message needs to be set
+static bool hasPerThreadBufferFor_dlerror()
+{
+ if (!dlerrorPerThreadKeyInitialized )
+ return false;
+
+ return (pthread_getspecific(dlerrorPerThreadKey) != NULL);
+}
+
+// use non-lazy pointer to vproc_swap_integer so that lazy binding does not recurse
+typedef vproc_err_t (*vswapproc)(vproc_t vp, vproc_gsk_t key,int64_t *inval, int64_t *outval);
+static vswapproc swapProc = &vproc_swap_integer;
+
+static bool isLaunchdOwned()
+{
+ int64_t val = 0;
+ (*swapProc)(NULL, VPROC_GSK_IS_MANAGED, NULL, &val);
+ return ( val != 0 );
+}
+
+#if DYLD_SHARED_CACHE_SUPPORT
+static void shared_cache_missing()
+{
+ // leave until dyld's that might call this are rare
+}
+
+static void shared_cache_out_of_date()
+{
+ // leave until dyld's that might call this are rare
+}
+#endif // DYLD_SHARED_CACHE_SUPPORT
+
+
+// the table passed to dyld containing thread helpers
+static dyld::LibSystemHelpers sHelpers = { 13, &dyldGlobalLockAcquire, &dyldGlobalLockRelease,
+ &getPerThreadBufferFor_dlerror, &malloc, &free, &__cxa_atexit,
+ #if DYLD_SHARED_CACHE_SUPPORT
+ &shared_cache_missing, &shared_cache_out_of_date,
+ #else
+ NULL, NULL,
+ #endif
+ NULL, NULL,
+ &pthread_key_create, &pthread_setspecific,
+ &malloc_size,
+ &pthread_getspecific,
+ &__cxa_finalize,
+ address_of_start,
+ &hasPerThreadBufferFor_dlerror,
+ &isLaunchdOwned,
+ &vm_allocate,
+ &mmap,
+ &__cxa_finalize_ranges
+ };
+
//
// during initialization of libSystem this routine will run
-// and call dyld, registering the threading helpers.
+// and call dyld, registering the helper functions.
//
-//
-static int registerWithDyld()
-{
- static void (*p)(dyld::ThreadingHelpers*) = NULL;
-
- // create key and tell pthread package to call free() on any data associated with key if thread dies
- pthread_key_create(&dlerrorPerThreadKey, &free);
-
- if(p == NULL)
- _dyld_func_lookup("__dyld_register_thread_helpers", (void**)&p);
+extern "C" void tlv_initializer();
+extern "C" void _dyld_initializer();
+void _dyld_initializer()
+{
+ void (*p)(dyld::LibSystemHelpers*);
+
+ _dyld_func_lookup("__dyld_register_thread_helpers", (void**)&p);
if(p != NULL)
- p(&sThreadHelpers);
-
- return 0;
-}
-
-// should be able to use __attribute__((constructor)) on registerWithDyld, but compiler has bug (3679135)
-// instead use initialization of global to force it to run.
-static int hack = registerWithDyld();
+ p(&sHelpers);
+
+ tlv_initializer();
+}
char* dlerror()
{
- DYLD_READER_LOCK_THIS_BLOCK;
+ DYLD_LOCK_THIS_BLOCK;
static char* (*p)() = NULL;
if(p == NULL)
@@ -1089,7 +1472,7 @@
int dladdr(const void* addr, Dl_info* info)
{
- DYLD_READER_LOCK_THIS_BLOCK;
+ DYLD_LOCK_THIS_BLOCK;
static int (*p)(const void* , Dl_info*) = NULL;
if(p == NULL)
@@ -1099,7 +1482,7 @@
int dlclose(void* handle)
{
- DYLD_WRITER_LOCK_THIS_BLOCK;
+ DYLD_LOCK_THIS_BLOCK;
static int (*p)(void* handle) = NULL;
if(p == NULL)
@@ -1108,18 +1491,36 @@
}
void* dlopen(const char* path, int mode)
-{
- DYLD_WRITER_LOCK_THIS_BLOCK;
+{
+ // dlopen is special. locking is done inside dyld to allow initializer to run without lock
+ DYLD_NO_LOCK_THIS_BLOCK;
+
static void* (*p)(const char* path, int) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_dlopen", (void**)&p);
- return(p(path, mode));
+ void* result = p(path, mode);
+ // use asm block to prevent tail call optimization
+ // this is needed because dlopen uses __builtin_return_address() and depends on this glue being in the frame chain
+ // <rdar://problem/5313172 dlopen() looks too far up stack, can cause crash>
+ __asm__ volatile("");
+
+ return result;
+}
+
+bool dlopen_preflight(const char* path)
+{
+ DYLD_LOCK_THIS_BLOCK;
+ static bool (*p)(const char* path) = NULL;
+
+ if(p == NULL)
+ _dyld_func_lookup("__dyld_dlopen_preflight", (void**)&p);
+ return(p(path));
}
void* dlsym(void* handle, const char* symbol)
{
- DYLD_READER_LOCK_THIS_BLOCK;
+ DYLD_LOCK_THIS_BLOCK;
static void* (*p)(void* handle, const char* symbol) = NULL;
if(p == NULL)
@@ -1128,6 +1529,279 @@
}
-
-
-
+const struct dyld_all_image_infos* _dyld_get_all_image_infos()
+{
+ DYLD_NO_LOCK_THIS_BLOCK;
+ static struct dyld_all_image_infos* (*p)() = NULL;
+
+ if(p == NULL)
+ _dyld_func_lookup("__dyld_get_all_image_infos", (void**)&p);
+ return p();
+}
+
+#if SUPPORT_ZERO_COST_EXCEPTIONS
+bool _dyld_find_unwind_sections(void* addr, dyld_unwind_sections* info)
+{
+ DYLD_NO_LOCK_THIS_BLOCK;
+ static void* (*p)(void*, dyld_unwind_sections*) = NULL;
+
+ if(p == NULL)
+ _dyld_func_lookup("__dyld_find_unwind_sections", (void**)&p);
+ return p(addr, info);
+}
+#endif
+
+
+#if __i386__ || __x86_64__ || __arm__ || __arm64__
+__attribute__((visibility("hidden")))
+void* _dyld_fast_stub_entry(void* loadercache, long lazyinfo)
+{
+ DYLD_NO_LOCK_THIS_BLOCK;
+ static void* (*p)(void*, long) = NULL;
+
+ if(p == NULL)
+ _dyld_func_lookup("__dyld_fast_stub_entry", (void**)&p);
+ return p(loadercache, lazyinfo);
+}
+#endif
+
+
+const char* dyld_image_path_containing_address(const void* addr)
+{
+ DYLD_NO_LOCK_THIS_BLOCK;
+ static const char* (*p)(const void*) = NULL;
+
+ if(p == NULL)
+ _dyld_func_lookup("__dyld_image_path_containing_address", (void**)&p);
+ return p(addr);
+}
+
+const struct mach_header* dyld_image_header_containing_address(const void* addr)
+{
+ DYLD_NO_LOCK_THIS_BLOCK;
+ static const mach_header* (*p)(const void*) = NULL;
+
+ if(p == NULL)
+ _dyld_func_lookup("__dyld_get_image_header_containing_address", (void**)&p);
+ return p(addr);
+}
+
+
+bool dyld_shared_cache_some_image_overridden()
+{
+ DYLD_NO_LOCK_THIS_BLOCK;
+ static bool (*p)() = NULL;
+
+ if(p == NULL)
+ _dyld_func_lookup("__dyld_shared_cache_some_image_overridden", (void**)&p);
+ return p();
+}
+
+bool _dyld_get_shared_cache_uuid(uuid_t uuid)
+{
+ DYLD_NO_LOCK_THIS_BLOCK;
+ static bool (*p)(uuid_t) = NULL;
+
+ if(p == NULL)
+ _dyld_func_lookup("__dyld_get_shared_cache_uuid", (void**)&p);
+ return p(uuid);
+}
+
+
+bool dyld_process_is_restricted()
+{
+ DYLD_NO_LOCK_THIS_BLOCK;
+ static bool (*p)() = NULL;
+
+ if(p == NULL)
+ _dyld_func_lookup("__dyld_process_is_restricted", (void**)&p);
+ return p();
+}
+
+#if DYLD_SHARED_CACHE_SUPPORT
+const char* dyld_shared_cache_file_path()
+{
+ DYLD_NO_LOCK_THIS_BLOCK;
+ static const char* (*p)() = NULL;
+
+ if(p == NULL)
+ _dyld_func_lookup("__dyld_shared_cache_file_path", (void**)&p);
+ return p();
+}
+#endif
+
+void dyld_dynamic_interpose(const struct mach_header* mh, const struct dyld_interpose_tuple array[], size_t count)
+{
+ DYLD_LOCK_THIS_BLOCK;
+ static void (*p)(const struct mach_header* mh, const struct dyld_interpose_tuple array[], size_t count) = NULL;
+
+ if (p == NULL)
+ _dyld_func_lookup("__dyld_dynamic_interpose", (void**)&p);
+ p(mh, array, count);
+}
+
+
+// SPI called __fork
+void _dyld_fork_child()
+{
+ DYLD_NO_LOCK_THIS_BLOCK;
+ static void (*p)() = NULL;
+
+ if(p == NULL)
+ _dyld_func_lookup("__dyld_fork_child", (void**)&p);
+ return p();
+}
+
+
+
+static void* mapStartOfCache(const char* path, size_t length)
+{
+ struct stat statbuf;
+ if ( ::stat(path, &statbuf) == -1 )
+ return NULL;
+
+ if ( statbuf.st_size < length )
+ return NULL;
+
+ int cache_fd = ::open(path, O_RDONLY);
+ if ( cache_fd < 0 )
+ return NULL;
+
+ void* result = ::mmap(NULL, length, PROT_READ, MAP_PRIVATE, cache_fd, 0);
+ close(cache_fd);
+
+ if ( result == MAP_FAILED )
+ return NULL;
+
+ return result;
+}
+
+
+static const dyld_cache_header* findCacheInDirAndMap(const uuid_t cacheUuid, const char* dirPath)
+{
+ DIR* dirp = ::opendir(dirPath);
+ if ( dirp != NULL) {
+ dirent entry;
+ dirent* entp = NULL;
+ char cachePath[PATH_MAX];
+ while ( ::readdir_r(dirp, &entry, &entp) == 0 ) {
+ if ( entp == NULL )
+ break;
+ if ( entp->d_type != DT_REG )
+ continue;
+ if ( strlcpy(cachePath, dirPath, PATH_MAX) >= PATH_MAX )
+ continue;
+ if ( strlcat(cachePath, "/", PATH_MAX) >= PATH_MAX )
+ continue;
+ if ( strlcat(cachePath, entp->d_name, PATH_MAX) >= PATH_MAX )
+ continue;
+ if ( const dyld_cache_header* cacheHeader = (dyld_cache_header*)mapStartOfCache(cachePath, 0x00100000) ) {
+ if ( ::memcmp(cacheHeader->uuid, cacheUuid, 16) != 0 ) {
+ // wrong uuid, unmap and keep looking
+ ::munmap((void*)cacheHeader, 0x00100000);
+ }
+ else {
+ // found cache
+ closedir(dirp);
+ return cacheHeader;
+ }
+ }
+ }
+ closedir(dirp);
+ }
+ return NULL;
+}
+
+int dyld_shared_cache_find_iterate_text(const uuid_t cacheUuid, const char* extraSearchDirs[], void (^callback)(const dyld_shared_cache_dylib_text_info* info))
+{
+ const dyld_cache_header* cacheHeader = NULL;
+ bool needToUnmap = true;
+
+ // get info from dyld about this process, to see if requested cache is already mapped into this process
+ const dyld_all_image_infos* allInfo = _dyld_get_all_image_infos();
+ if ( (allInfo != NULL) && (memcmp(allInfo->sharedCacheUUID, cacheUuid, 16) == 0) ) {
+ // requested cache is already mapped, just re-use it
+ cacheHeader = (dyld_cache_header*)(SHARED_REGION_BASE + allInfo->sharedCacheSlide);
+ needToUnmap = false;
+ }
+ else {
+ // look first is default location for cache files
+ #if __IPHONE_OS_VERSION_MIN_REQUIRED
+ const char* defaultSearchDir = IPHONE_DYLD_SHARED_CACHE_DIR;
+ #else
+ const char* defaultSearchDir = MACOSX_DYLD_SHARED_CACHE_DIR;
+ #endif
+ cacheHeader = findCacheInDirAndMap(cacheUuid, defaultSearchDir);
+ // if not there, look in extra search locations
+ if ( cacheHeader == NULL ) {
+ for (const char** p = extraSearchDirs; *p != NULL; ++p) {
+ cacheHeader = findCacheInDirAndMap(cacheUuid, *p);
+ if ( cacheHeader != NULL )
+ break;
+ }
+ }
+ }
+
+ if ( cacheHeader == NULL )
+ return -1;
+
+ if ( cacheHeader->mappingOffset < sizeof(dyld_cache_header) ) {
+ // old cache without imagesText array
+ if ( needToUnmap )
+ ::munmap((void*)cacheHeader, 0x00100000);
+ return -1;
+ }
+
+ // walk imageText table and call callback for each entry
+ const dyld_cache_image_text_info* imagesText = (dyld_cache_image_text_info*)((char*)cacheHeader + cacheHeader->imagesTextOffset);
+ const dyld_cache_image_text_info* imagesTextEnd = &imagesText[cacheHeader->imagesTextCount];
+ for (const dyld_cache_image_text_info* p=imagesText; p < imagesTextEnd; ++p) {
+ dyld_shared_cache_dylib_text_info dylibTextInfo;
+ dylibTextInfo.version = 1;
+ dylibTextInfo.loadAddressUnslid = p->loadAddress;
+ dylibTextInfo.textSegmentSize = p->textSegmentSize;
+ dylibTextInfo.path = (char*)cacheHeader + p->pathOffset;
+ ::memcpy(dylibTextInfo.dylibUuid, p->uuid, 16);
+ callback(&dylibTextInfo);
+ }
+
+ if ( needToUnmap )
+ ::munmap((void*)cacheHeader, 0x00100000);
+
+ return 0;
+}
+
+int dyld_shared_cache_iterate_text(const uuid_t cacheUuid, void (^callback)(const dyld_shared_cache_dylib_text_info* info))
+{
+ const char* extraSearchDirs[] = { NULL };
+ return dyld_shared_cache_find_iterate_text(cacheUuid, extraSearchDirs, callback);
+}
+
+
+bool _dyld_is_memory_immutable(const void* addr, size_t length)
+{
+ DYLD_NO_LOCK_THIS_BLOCK;
+ static bool (*p)(const void*, size_t) = NULL;
+
+ if(p == NULL)
+ _dyld_func_lookup("__dyld_is_memory_immutable", (void**)&p);
+ return p(addr, length);
+}
+
+
+void _dyld_objc_notify_register(_dyld_objc_notify_mapped mapped,
+ _dyld_objc_notify_init init,
+ _dyld_objc_notify_unmapped unmapped)
+{
+ DYLD_LOCK_THIS_BLOCK;
+ static bool (*p)(_dyld_objc_notify_mapped, _dyld_objc_notify_init, _dyld_objc_notify_unmapped) = NULL;
+
+ if(p == NULL)
+ _dyld_func_lookup("__dyld_objc_notify_register", (void**)&p);
+ p(mapped, init, unmapped);
+}
+
+
+
+
+