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--- dyld/dyld-239.3/src/dyldAPIsInLibSystem.cpp
+++ dyld/dyld-832.7.3/src/dyldAPIsInLibSystem.cpp
@@ -26,48 +26,112 @@
#include <string.h>
#include <malloc/malloc.h>
#include <sys/mman.h>
-
+#include <execinfo.h>
+
+#include <TargetConditionals.h>
+#include <System/sys/csr.h>
#include <crt_externs.h>
#include <Availability.h>
+#if !TARGET_OS_DRIVERKIT
#include <vproc_priv.h>
-
-#include "mach-o/dyld.h"
-#include "mach-o/dyld_priv.h"
-
+#endif
+#include <dirent.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <System/sys/codesign.h>
+#include <libc_private.h>
+
+#include <mach-o/dyld_images.h>
+#include <mach-o/dyld.h>
+#include <mach-o/dyld_priv.h>
+
+#include "dyld_cache_format.h"
+#include "objc-shared-cache.h"
+
+#include "ImageLoader.h"
#include "dyldLock.h"
-#include "start_glue.h"
+
+#include "APIs.h"
+#include "AllImages.h"
+#include "StartGlue.h"
+#include "Tracing.h"
+
+
+// this was in dyld_priv.h but it is no longer exported
+extern "C" {
+ const struct dyld_all_image_infos* _dyld_get_all_image_infos() __attribute__((visibility("hidden")));
+}
+
extern "C" int __cxa_atexit(void (*func)(void *), void *arg, void *dso);
extern "C" void __cxa_finalize(const void *dso);
-
-
-#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 */
- };
+extern "C" void __cxa_finalize_ranges(const struct __cxa_range_t ranges[], int count);
+
+//
+// private interface between libSystem.dylib and dyld
+//
+extern "C" int _dyld_func_lookup(const char* dyld_func_name, void **address);
+
+#if TARGET_OS_IOS && !TARGET_OS_SIMULATOR
+namespace dyld3 {
+ extern int compatFuncLookup(const char* name, void** address) __API_AVAILABLE(ios(13.0));
+}
+extern "C" void setLookupFunc(void*);
#endif
-#ifndef LC_VERSION_MIN_IPHONEOS
- #define LC_VERSION_MIN_IPHONEOS 0x25
-#endif
-
-
-#ifndef LC_LOAD_UPWARD_DYLIB
- #define LC_LOAD_UPWARD_DYLIB (0x23|LC_REQ_DYLD) /* load of dylib whose initializers run later */
-#endif
-
-#define DYLD_SHARED_CACHE_SUPPORT (__i386__ || __x86_64__ || __arm__)
+
+extern bool gUseDyld3;
+
+
+// <rdar://problem/61161069> libdyld.dylib should use abort_with_payload() for asserts
+VIS_HIDDEN
+void abort_report_np(const char* format, ...)
+{
+ va_list list;
+ const char *str;
+ _SIMPLE_STRING s = _simple_salloc();
+ if ( s != NULL ) {
+ va_start(list, format);
+ _simple_vsprintf(s, format, list);
+ va_end(list);
+ str = _simple_string(s);
+ }
+ else {
+ // _simple_salloc failed, but at least format may have useful info by itself
+ str = format;
+ }
+ if ( gUseDyld3 ) {
+ dyld3::halt(str);
+ }
+ else {
+ void (*p)(const char* msg) __attribute__((__noreturn__));
+ _dyld_func_lookup("__dyld_halt", (void**)&p);
+ p(str);
+ }
+ // halt() doesn't return, so we can't call _simple_sfree
+}
+
+// libc uses assert()
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Winvalid-noreturn"
+VIS_HIDDEN
+void __assert_rtn(const char* func, const char* file, int line, const char* failedexpr)
+{
+ if (func == NULL) {
+ abort_report_np("Assertion failed: (%s), file %s, line %d.\n", failedexpr, file, line);
+ } else {
+ abort_report_np("Assertion failed: (%s), function %s, file %s, line %d.\n", failedexpr, func, file, line);
+ }
+}
+#pragma clang diagnostic pop
+
// deprecated APIs are still availble on Mac OS X, but not on iPhone OS
-#if __IPHONE_OS_VERSION_MIN_REQUIRED
+#if TARGET_OS_OSX
+ #define DEPRECATED_APIS_SUPPORTED 1
+#else
#define DEPRECATED_APIS_SUPPORTED 0
-#else
- #define DEPRECATED_APIS_SUPPORTED 1
#endif
/*
@@ -79,10 +143,10 @@
static
bool
names_match(
-char *install_name,
+const char *install_name,
const char* libraryName)
{
- char *basename;
+ const char *basename;
unsigned long n;
/*
@@ -103,7 +167,7 @@
* 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
@@ -113,14 +177,14 @@
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
@@ -128,6 +192,9 @@
void NSInstallLinkEditErrorHandlers(
const NSLinkEditErrorHandlers* handlers)
{
+ if ( gUseDyld3 )
+ return dyld3::NSInstallLinkEditErrorHandlers(handlers);
+
DYLD_LOCK_THIS_BLOCK;
typedef void (*ucallback_t)(const char* symbol_name);
typedef NSModule (*mcallback_t)(NSSymbol s, NSModule old, NSModule newhandler);
@@ -145,6 +212,9 @@
NSNameOfModule(
NSModule module)
{
+ if ( gUseDyld3 )
+ return dyld3::NSNameOfModule(module);
+
DYLD_LOCK_THIS_BLOCK;
static const char* (*p)(NSModule module) = NULL;
@@ -157,6 +227,9 @@
NSLibraryNameForModule(
NSModule module)
{
+ if ( gUseDyld3 )
+ return dyld3::NSLibraryNameForModule(module);
+
DYLD_LOCK_THIS_BLOCK;
static const char* (*p)(NSModule module) = NULL;
@@ -169,6 +242,9 @@
NSIsSymbolNameDefined(
const char* symbolName)
{
+ if ( gUseDyld3 )
+ return dyld3::NSIsSymbolNameDefined(symbolName);
+
DYLD_LOCK_THIS_BLOCK;
static bool (*p)(const char* symbolName) = NULL;
@@ -182,6 +258,9 @@
const char* symbolName,
const char* libraryNameHint)
{
+ if ( gUseDyld3 )
+ return dyld3::NSIsSymbolNameDefinedWithHint(symbolName, libraryNameHint);
+
DYLD_LOCK_THIS_BLOCK;
static bool (*p)(const char* symbolName,
const char* libraryNameHint) = NULL;
@@ -196,6 +275,9 @@
const struct mach_header *image,
const char* symbolName)
{
+ if ( gUseDyld3 )
+ return dyld3::NSIsSymbolNameDefinedInImage(image, symbolName);
+
DYLD_LOCK_THIS_BLOCK;
static bool (*p)(const struct mach_header *image,
const char* symbolName) = NULL;
@@ -209,6 +291,9 @@
NSLookupAndBindSymbol(
const char* symbolName)
{
+ if ( gUseDyld3 )
+ return dyld3::NSLookupAndBindSymbol(symbolName);
+
DYLD_LOCK_THIS_BLOCK;
static NSSymbol (*p)(const char* symbolName) = NULL;
@@ -222,6 +307,9 @@
const char* symbolName,
const char* libraryNameHint)
{
+ if ( gUseDyld3 )
+ return dyld3::NSLookupAndBindSymbolWithHint(symbolName, libraryNameHint);
+
DYLD_LOCK_THIS_BLOCK;
static NSSymbol (*p)(const char* symbolName,
const char* libraryNameHint) = NULL;
@@ -236,6 +324,9 @@
NSModule module,
const char* symbolName)
{
+ if ( gUseDyld3 )
+ return dyld3::NSLookupSymbolInModule(module, symbolName);
+
DYLD_LOCK_THIS_BLOCK;
static NSSymbol (*p)(NSModule module, const char* symbolName) = NULL;
@@ -250,8 +341,11 @@
const char* symbolName,
uint32_t options)
{
+ if ( gUseDyld3 )
+ return dyld3::NSLookupSymbolInImage(image, symbolName, options);
+
DYLD_LOCK_THIS_BLOCK;
- static NSSymbol (*p)(const struct mach_header *image,
+ static NSSymbol (*p)(const struct mach_header *image,
const char* symbolName,
uint32_t options) = NULL;
@@ -264,6 +358,9 @@
NSNameOfSymbol(
NSSymbol symbol)
{
+ if ( gUseDyld3 )
+ return dyld3::NSNameOfSymbol(symbol);
+
DYLD_LOCK_THIS_BLOCK;
static char * (*p)(NSSymbol symbol) = NULL;
@@ -276,6 +373,9 @@
NSAddressOfSymbol(
NSSymbol symbol)
{
+ if ( gUseDyld3 )
+ return dyld3::NSAddressOfSymbol(symbol);
+
DYLD_LOCK_THIS_BLOCK;
static void * (*p)(NSSymbol symbol) = NULL;
@@ -288,6 +388,9 @@
NSModuleForSymbol(
NSSymbol symbol)
{
+ if ( gUseDyld3 )
+ return dyld3::NSModuleForSymbol(symbol);
+
DYLD_LOCK_THIS_BLOCK;
static NSModule (*p)(NSSymbol symbol) = NULL;
@@ -300,6 +403,9 @@
NSAddLibrary(
const char* pathName)
{
+ if ( gUseDyld3 )
+ return dyld3::NSAddLibrary(pathName);
+
DYLD_LOCK_THIS_BLOCK;
static bool (*p)(const char* pathName) = NULL;
@@ -312,6 +418,9 @@
NSAddLibraryWithSearching(
const char* pathName)
{
+ if ( gUseDyld3 )
+ return dyld3::NSAddLibrary(pathName);
+
DYLD_LOCK_THIS_BLOCK;
static bool (*p)(const char* pathName) = NULL;
@@ -325,6 +434,9 @@
const char* image_name,
uint32_t options)
{
+ if ( gUseDyld3 )
+ return dyld3::NSAddImage(image_name, options);
+
DYLD_LOCK_THIS_BLOCK;
static const struct mach_header * (*p)(const char* image_name,
uint32_t options) = NULL;
@@ -346,42 +458,38 @@
* 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;
+int32_t NSVersionOfLinkTimeLibrary(const char* libraryName)
+{
+ if ( gUseDyld3 )
+ return dyld3::NSVersionOfLinkTimeLibrary(libraryName);
+
+ // Lazily call _NSGetMachExecuteHeader() and cache result
#if __LP64__
- static struct mach_header_64 *mh = NULL;
+ static mach_header_64* mh = NULL;
#else
- static struct mach_header *mh = NULL;
+ static mach_header* mh = NULL;
#endif
- if(mh == NULL)
+ if ( mh == NULL )
mh = _NSGetMachExecuteHeader();
- load_commands = (struct load_command *)
#if __LP64__
- ((char *)mh + sizeof(struct mach_header_64));
+ const load_command* lc = (load_command*)((char*)mh + sizeof(mach_header_64));
#else
- ((char *)mh + sizeof(struct mach_header));
+ const load_command* lc = (load_command*)((char*)mh + sizeof(mach_header));
#endif
- lc = load_commands;
- for(i = 0; i < mh->ncmds; i++){
+ 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:
- 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);
+ 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 = (struct load_command *)((char *)lc + lc->cmdsize);
+ lc = (load_command*)((char*)lc + lc->cmdsize);
}
- return(-1);
+ return (-1);
}
/*
@@ -391,210 +499,216 @@
* 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 *)
+int32_t NSVersionOfRunTimeLibrary(const char* libraryName)
+{
+ if ( gUseDyld3 )
+ return dyld3::NSVersionOfRunTimeLibrary(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__
- ((char *)mh + sizeof(struct mach_header_64));
+ const load_command* lc = (load_command*)((char*)mh + sizeof(mach_header_64));
#else
- ((char *)mh + sizeof(struct mach_header));
+ const load_command* lc = (load_command*)((char*)mh + sizeof(mach_header));
#endif
- 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);
- }
- lc = (struct load_command *)((char *)lc + lc->cmdsize);
+ 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))
-
+ return (-1);
+}
+
+#if TARGET_OS_WATCH
+uint32_t dyld_get_program_sdk_watch_os_version()
+{
+ if (gUseDyld3)
+ return dyld3::dyld_get_program_sdk_watch_os_version();
+
+ __block uint32_t retval = 0;
+ __block bool versionFound = false;
+ dyld3::dyld_get_image_versions((mach_header*)_NSGetMachExecuteHeader(), ^(dyld_platform_t platform, uint32_t sdk_version, uint32_t min_version) {
+ if (versionFound) return;
+
+ if (dyld_get_base_platform(platform) == PLATFORM_WATCHOS) {
+ versionFound = true;
+ retval = sdk_version;
+ }
+ });
+
+ return retval;
+}
+
+uint32_t dyld_get_program_min_watch_os_version()
+{
+ if (gUseDyld3)
+ return dyld3::dyld_get_program_min_watch_os_version();
+
+ __block uint32_t retval = 0;
+ __block bool versionFound = false;
+ dyld3::dyld_get_image_versions((mach_header*)_NSGetMachExecuteHeader(), ^(dyld_platform_t platform, uint32_t sdk_version, uint32_t min_version) {
+ if (versionFound) return;
+
+ if (dyld_get_base_platform(platform) == PLATFORM_WATCHOS) {
+ versionFound = true;
+ retval = min_version;
+ }
+ });
+
+ return retval;
+}
+#endif
+
+#if TARGET_OS_BRIDGE
+uint32_t dyld_get_program_sdk_bridge_os_version()
+{
+ if (gUseDyld3)
+ return dyld3::dyld_get_program_sdk_bridge_os_version();
+
+ __block uint32_t retval = 0;
+ __block bool versionFound = false;
+ dyld3::dyld_get_image_versions((mach_header*)_NSGetMachExecuteHeader(), ^(dyld_platform_t platform, uint32_t sdk_version, uint32_t min_version) {
+ if (versionFound) return;
+
+ if (dyld_get_base_platform(platform) == PLATFORM_BRIDGEOS) {
+ versionFound = true;
+ retval = sdk_version;
+ }
+ });
+
+ return retval;
+}
+
+uint32_t dyld_get_program_min_bridge_os_version()
+{
+ if (gUseDyld3)
+ return dyld3::dyld_get_program_min_bridge_os_version();
+
+ __block uint32_t retval = 0;
+ __block bool versionFound = false;
+ dyld3::dyld_get_image_versions((mach_header*)_NSGetMachExecuteHeader(), ^(dyld_platform_t platform, uint32_t sdk_version, uint32_t min_version) {
+ if (versionFound) return;
+
+ if (dyld_get_base_platform(platform) == PLATFORM_BRIDGEOS) {
+ versionFound = true;
+ retval = min_version;
+ }
+ });
+
+ return retval;
+}
+#endif
/*
* Returns the sdk version (encode as nibble XXXX.YY.ZZ) the
* specified binary was built against.
*
- * First looks for LC_VERSION_MIN_MACOSX/LC_VERSION_MIN_IPHONEOS
- * in binary and if sdk field is not zero, return that value.
+ * 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)
{
- const load_command* cmds = NULL;
+ return dyld3::dyld_get_sdk_version(mh);
+}
+
+uint32_t dyld_get_program_sdk_version()
+{
+ return dyld3::dyld_get_sdk_version((mach_header*)_NSGetMachExecuteHeader());
+}
+
+uint32_t dyld_get_min_os_version(const struct mach_header* mh)
+{
+ return dyld3::dyld_get_min_os_version(mh);
+}
+
+
+uint32_t dyld_get_program_min_os_version()
+{
+ return dyld3::dyld_get_min_os_version((mach_header*)_NSGetMachExecuteHeader());
+}
+
+
+bool _dyld_get_image_uuid(const struct mach_header* mh, uuid_t uuid)
+{
+ if ( gUseDyld3 )
+ return dyld3::_dyld_get_image_uuid(mh, uuid);
+
+ const load_command* startCmds = NULL;
if ( mh->magic == MH_MAGIC_64 )
- cmds = (load_command*)((char *)mh + sizeof(mach_header_64));
+ startCmds = (load_command*)((char *)mh + sizeof(mach_header_64));
else if ( mh->magic == MH_MAGIC )
- cmds = (load_command*)((char *)mh + sizeof(mach_header));
+ startCmds = (load_command*)((char *)mh + sizeof(mach_header));
else
- return 0; // not a mach-o file, or wrong endianness
-
- const version_min_command* versCmd;
- const dylib_command* dylibCmd;
- const load_command* cmd = cmds;
- const char* dylibName;
-#if __IPHONE_OS_VERSION_MIN_REQUIRED
- uint32_t foundationVers = 0;
-#else
- uint32_t libSystemVers = 0;
-#endif
+ 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) {
- switch ( cmd->cmd ) {
-#if __IPHONE_OS_VERSION_MIN_REQUIRED
- case LC_VERSION_MIN_IPHONEOS:
-#else
- case LC_VERSION_MIN_MACOSX:
-#endif
- versCmd = (version_min_command*)cmd;
-#ifdef DICE_KIND_DATA
- if ( versCmd->sdk != 0 )
- return versCmd->sdk; // found explicit SDK version
-#else
- if ( versCmd->reserved != 0 )
- return versCmd->reserved; // found explicit SDK version
-#endif
- break;
- case LC_LOAD_DYLIB:
- case LC_LOAD_WEAK_DYLIB:
- case LC_LOAD_UPWARD_DYLIB:
- dylibCmd = (dylib_command*)cmd;
- 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;
+ const load_command* nextCmd = (load_command*)((char *)cmd + cmd->cmdsize);
+ if ( (cmd->cmdsize < 8) || (nextCmd > cmdsEnd) || (nextCmd < startCmds)) {
+ return false;
}
- cmd = (load_command*)((char *)cmd + cmd->cmdsize);
+ if ( cmd->cmd == LC_UUID ) {
+ const uuid_command* uuidCmd = (uuid_command*)cmd;
+ memcpy(uuid, uuidCmd->uuid, 16);
+ return true;
+ }
+ 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 }, // check final
- { PACKED_VERSION(0,0,0), DYLD_IOS_VERSION_7_0 }
- };
-
- 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 }
- };
-
- 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;
-}
-
-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)
-{
- const load_command* cmds = NULL;
- if ( mh->magic == MH_MAGIC_64 )
- cmds = (load_command*)((char *)mh + sizeof(mach_header_64));
- else if ( mh->magic == MH_MAGIC )
- cmds = (load_command*)((char *)mh + sizeof(mach_header));
- else
- return 0; // not a mach-o file, or wrong endianness
-
- const version_min_command* versCmd;
- const load_command* cmd = cmds;
- for(uint32_t i = 0; i < mh->ncmds; ++i) {
- switch ( cmd->cmd ) {
-#if __IPHONE_OS_VERSION_MIN_REQUIRED
- case LC_VERSION_MIN_IPHONEOS:
-#else
- case LC_VERSION_MIN_MACOSX:
-#endif
- versCmd = (version_min_command*)cmd;
- return versCmd->version; // found explicit min OS version
- break;
- }
- cmd = (load_command*)((char *)cmd + cmd->cmdsize);
- }
- return 0;
-}
-
-
-uint32_t dyld_get_program_min_os_version()
-{
- return dyld_get_min_os_version((mach_header*)_NSGetMachExecuteHeader());
-}
+ bzero(uuid, 16);
+ return false;
+}
+
+dyld_platform_t dyld_get_active_platform(void) {
+ if (gUseDyld3)
+ return dyld3::dyld_get_active_platform();
+
+ return (dyld_platform_t)_dyld_get_all_image_infos()->platform;
+}
+
+dyld_platform_t dyld_get_base_platform(dyld_platform_t platform) {
+ return dyld3::dyld_get_base_platform(platform);
+}
+
+bool dyld_is_simulator_platform(dyld_platform_t platform) {
+ return dyld3::dyld_is_simulator_platform(platform);
+}
+
+bool dyld_sdk_at_least(const struct mach_header* mh, dyld_build_version_t version) {
+ return dyld3::dyld_sdk_at_least(mh, version);
+}
+
+bool dyld_minos_at_least(const struct mach_header* mh, dyld_build_version_t version) {
+ return dyld3::dyld_minos_at_least(mh, version);
+}
+
+bool dyld_program_sdk_at_least(dyld_build_version_t version) {
+ return dyld3::dyld_program_sdk_at_least(version);
+}
+
+bool dyld_program_minos_at_least(dyld_build_version_t version) {
+ return dyld3::dyld_program_minos_at_least(version);
+}
+
+// Function that walks through the load commands and calls the internal block for every version found
+// Intended as a fallback for very complex (and rare) version checks, or for tools that need to
+// print our everything for diagnostic reasons
+void dyld_get_image_versions(const struct mach_header* mh, void (^callback)(dyld_platform_t platform, uint32_t sdk_version, uint32_t min_version)) {
+ dyld3::dyld_get_image_versions(mh, callback);
+}
+
#if DEPRECATED_APIS_SUPPORTED
@@ -610,6 +724,9 @@
const char* pathName,
NSObjectFileImage *objectFileImage)
{
+ if ( gUseDyld3 )
+ return dyld3::NSCreateObjectFileImageFromFile(pathName, objectFileImage);
+
DYLD_LOCK_THIS_BLOCK;
static NSObjectFileImageReturnCode (*p)(const char*, NSObjectFileImage*) = NULL;
@@ -632,6 +749,18 @@
size_t size,
NSObjectFileImage *objectFileImage)
{
+ // <rdar://problem/51812762> NSCreatObjectFileImageFromMemory fail opaquely if Hardened runtime is enabled
+ uint32_t flags;
+ if ( csops(0, CS_OPS_STATUS, &flags, sizeof(flags)) != -1 ) {
+ if ( (flags & (CS_ENFORCEMENT|CS_KILL)) == (CS_ENFORCEMENT|CS_KILL) ) {
+ //fprintf(stderr, "dyld: warning: NSCreatObjectFileImageFromMemory() cannot be used in harden process 0x%08X\n", flags);
+ return NSObjectFileImageAccess;
+ }
+ }
+
+ if ( gUseDyld3 )
+ return dyld3::NSCreateObjectFileImageFromMemory(address, size, objectFileImage);
+
DYLD_LOCK_THIS_BLOCK;
static NSObjectFileImageReturnCode (*p)(const void*, size_t, NSObjectFileImage*) = NULL;
@@ -665,6 +794,9 @@
NSDestroyObjectFileImage(
NSObjectFileImage objectFileImage)
{
+ if ( gUseDyld3 )
+ return dyld3::NSDestroyObjectFileImage(objectFileImage);
+
DYLD_LOCK_THIS_BLOCK;
static bool (*p)(NSObjectFileImage) = NULL;
@@ -680,6 +812,9 @@
const char* moduleName,
uint32_t options)
{
+ if ( gUseDyld3 )
+ return dyld3::NSLinkModule(objectFileImage, moduleName, options);
+
DYLD_LOCK_THIS_BLOCK;
static NSModule (*p)(NSObjectFileImage, const char*, unsigned long) = NULL;
@@ -700,8 +835,11 @@
NSSymbolDefinitionCountInObjectFileImage(
NSObjectFileImage objectFileImage)
{
- DYLD_LOCK_THIS_BLOCK;
- static unsigned long (*p)(NSObjectFileImage) = NULL;
+ if ( gUseDyld3 )
+ return dyld3::NSSymbolDefinitionCountInObjectFileImage(objectFileImage);
+
+ DYLD_LOCK_THIS_BLOCK;
+ static uint32_t (*p)(NSObjectFileImage) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_NSSymbolDefinitionCountInObjectFileImage", (void**)&p);
@@ -720,6 +858,9 @@
NSObjectFileImage objectFileImage,
uint32_t ordinal)
{
+ if ( gUseDyld3 )
+ return dyld3::NSSymbolDefinitionNameInObjectFileImage(objectFileImage, ordinal);
+
DYLD_LOCK_THIS_BLOCK;
static const char* (*p)(NSObjectFileImage, uint32_t) = NULL;
@@ -737,8 +878,11 @@
NSSymbolReferenceCountInObjectFileImage(
NSObjectFileImage objectFileImage)
{
- DYLD_LOCK_THIS_BLOCK;
- static unsigned long (*p)(NSObjectFileImage) = NULL;
+ if ( gUseDyld3 )
+ return dyld3::NSSymbolReferenceCountInObjectFileImage(objectFileImage);
+
+ DYLD_LOCK_THIS_BLOCK;
+ static uint32_t (*p)(NSObjectFileImage) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_NSSymbolReferenceCountInObjectFileImage", (void**)&p);
@@ -758,6 +902,9 @@
uint32_t ordinal,
bool *tentative_definition) /* can be NULL */
{
+ if ( gUseDyld3 )
+ return dyld3::NSSymbolReferenceNameInObjectFileImage(objectFileImage, ordinal, tentative_definition);
+
DYLD_LOCK_THIS_BLOCK;
static const char* (*p)(NSObjectFileImage, uint32_t, bool*) = NULL;
@@ -776,6 +923,9 @@
NSObjectFileImage objectFileImage,
const char* symbolName)
{
+ if ( gUseDyld3 )
+ return dyld3::NSIsSymbolDefinedInObjectFileImage(objectFileImage, symbolName);
+
DYLD_LOCK_THIS_BLOCK;
static bool (*p)(NSObjectFileImage, const char*) = NULL;
@@ -799,6 +949,9 @@
const char* sectionName,
unsigned long *size) /* can be NULL */
{
+ if ( gUseDyld3 )
+ return dyld3::NSGetSectionDataInObjectFileImage(objectFileImage, segmentName, sectionName, size);
+
DYLD_LOCK_THIS_BLOCK;
static void* (*p)(NSObjectFileImage, const char*, const char*, unsigned long*) = NULL;
@@ -816,6 +969,9 @@
const char* *fileName,
const char* *errorString)
{
+ if ( gUseDyld3 )
+ return dyld3::NSLinkEditError(c, errorNumber, fileName, errorString);
+
DYLD_LOCK_THIS_BLOCK;
static void (*p)(NSLinkEditErrors *c,
int *errorNumber,
@@ -833,6 +989,9 @@
NSModule module,
uint32_t options)
{
+ if ( gUseDyld3 )
+ return dyld3::NSUnLinkModule(module, options);
+
DYLD_LOCK_THIS_BLOCK;
static bool (*p)(NSModule module, uint32_t options) = NULL;
@@ -870,7 +1029,10 @@
char *buf,
uint32_t *bufsize)
{
- DYLD_LOCK_THIS_BLOCK;
+ if ( gUseDyld3 )
+ return dyld3::_NSGetExecutablePath(buf, bufsize);
+
+ DYLD_NO_LOCK_THIS_BLOCK;
static int (*p)(char *buf, uint32_t *bufsize) = NULL;
if(p == NULL)
@@ -885,6 +1047,9 @@
void** address,
NSModule* module)
{
+ if ( gUseDyld3 )
+ return dyld3::_dyld_lookup_and_bind(symbol_name, address, module);
+
DYLD_LOCK_THIS_BLOCK;
static void (*p)(const char*, void** , NSModule*) = NULL;
@@ -962,6 +1127,9 @@
_dyld_register_func_for_add_image(
void (*func)(const struct mach_header *mh, intptr_t vmaddr_slide))
{
+ if ( gUseDyld3 )
+ return dyld3::_dyld_register_func_for_add_image(func);
+
DYLD_LOCK_THIS_BLOCK;
typedef void (*callback_t)(const struct mach_header *mh, intptr_t vmaddr_slide);
static void (*p)(callback_t func) = NULL;
@@ -980,6 +1148,9 @@
_dyld_register_func_for_remove_image(
void (*func)(const struct mach_header *mh, intptr_t vmaddr_slide))
{
+ if ( gUseDyld3 )
+ return dyld3::_dyld_register_func_for_remove_image(func);
+
DYLD_LOCK_THIS_BLOCK;
typedef void (*callback_t)(const struct mach_header *mh, intptr_t vmaddr_slide);
static void (*p)(callback_t func) = NULL;
@@ -1063,21 +1234,6 @@
p(module, objc_module, size);
}
-/*
- * _dyld_bind_objc_module() is passed a pointer to something in an (__OBJC,
- * __module) section and causes the module that is associated with that address
- * to be bound.
- */
-void
-_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);
-}
#endif
#if DEPRECATED_APIS_SUPPORTED
@@ -1092,8 +1248,11 @@
uint32_t
_dyld_image_count(void)
{
+ if ( gUseDyld3 )
+ return dyld3::_dyld_image_count();
+
DYLD_NO_LOCK_THIS_BLOCK;
- static unsigned long (*p)(void) = NULL;
+ static uint32_t (*p)(void) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_image_count", (void**)&p);
@@ -1103,6 +1262,9 @@
const struct mach_header *
_dyld_get_image_header(uint32_t image_index)
{
+ if ( gUseDyld3 )
+ return dyld3::_dyld_get_image_header(image_index);
+
DYLD_NO_LOCK_THIS_BLOCK;
static struct mach_header * (*p)(uint32_t image_index) = NULL;
@@ -1114,6 +1276,9 @@
intptr_t
_dyld_get_image_vmaddr_slide(uint32_t image_index)
{
+ if ( gUseDyld3 )
+ return dyld3::_dyld_get_image_vmaddr_slide(image_index);
+
DYLD_NO_LOCK_THIS_BLOCK;
static unsigned long (*p)(uint32_t image_index) = NULL;
@@ -1125,6 +1290,9 @@
const char*
_dyld_get_image_name(uint32_t image_index)
{
+ if ( gUseDyld3 )
+ return dyld3::_dyld_get_image_name(image_index);
+
DYLD_NO_LOCK_THIS_BLOCK;
static const char* (*p)(uint32_t image_index) = NULL;
@@ -1136,18 +1304,31 @@
// 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));
-}
-
-
+ // always use dyld3 version because it does better error handling
+ return dyld3::_dyld_get_image_slide(mh);
+}
+
+const struct mach_header *
+_dyld_get_prog_image_header()
+{
+ if ( gUseDyld3 )
+ return dyld3::_dyld_get_prog_image_header();
+
+ DYLD_LOCK_THIS_BLOCK;
+ static const struct mach_header * (*p)(void) = NULL;
+
+ if(p == NULL)
+ _dyld_func_lookup("__dyld_get_prog_image_header", (void**)&p);
+ return p();
+}
+
+#if DEPRECATED_APIS_SUPPORTED
bool
_dyld_image_containing_address(const void* address)
{
+ if ( gUseDyld3 )
+ return dyld3::_dyld_image_containing_address(address);
+
DYLD_LOCK_THIS_BLOCK;
static bool (*p)(const void*) = NULL;
@@ -1160,6 +1341,9 @@
_dyld_get_image_header_containing_address(
const void* address)
{
+ if ( gUseDyld3 )
+ return dyld3::_dyld_get_image_header_containing_address(address);
+
DYLD_LOCK_THIS_BLOCK;
static const struct mach_header * (*p)(const void*) = NULL;
@@ -1168,19 +1352,6 @@
return p(address);
}
-void _dyld_moninit(
-void (*monaddition)(char *lowpc, char *highpc))
-{
- DYLD_LOCK_THIS_BLOCK;
- typedef void (*monproc)(char *lowpc, char *highpc);
- static void (*p)(monproc monaddition) = NULL;
-
- if(p == NULL)
- _dyld_func_lookup("__dyld_moninit", (void**)&p);
- p(monaddition);
-}
-
-#if DEPRECATED_APIS_SUPPORTED
bool _dyld_launched_prebound(void)
{
DYLD_LOCK_THIS_BLOCK;
@@ -1203,12 +1374,11 @@
#endif // DEPRECATED_APIS_SUPPORTED
-#include <dlfcn.h>
+#include <dlfcn_private.h>
#include <stddef.h>
#include <pthread.h>
#include <stdlib.h>
#include <mach-o/dyld.h>
-#include <servers/bootstrap.h>
#include "dyldLibSystemInterface.h"
@@ -1219,12 +1389,12 @@
// 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)
+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 ) {
@@ -1233,11 +1403,11 @@
dlerrorPerThreadKeyInitialized = true;
}
- const int size = (sizeRequired < 256) ? 256 : sizeRequired;
+ 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);
@@ -1245,7 +1415,7 @@
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);
@@ -1263,24 +1433,30 @@
return (pthread_getspecific(dlerrorPerThreadKey) != NULL);
}
+#if TARGET_OS_DRIVERKIT
+static bool isLaunchdOwned()
+{
+ return false;
+}
+#else
// 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() {
- static bool first = true;
- static bool result;
- if ( first ) {
- int64_t val = 0;
- (*swapProc)(NULL, VPROC_GSK_IS_MANAGED, NULL, &val);
- result = ( val != 0 );
- first = false;
- }
- return result;
-}
-
-
-#if DYLD_SHARED_CACHE_SUPPORT
+static bool isLaunchdOwned()
+{
+ static bool checked = false;
+ static bool result = false;
+ if ( !checked ) {
+ checked = true;
+ int64_t val = 0;
+ (*swapProc)(NULL, VPROC_GSK_IS_MANAGED, NULL, &val);
+ result = ( val != 0 );
+ }
+ return result;
+}
+#endif
+
static void shared_cache_missing()
{
// leave until dyld's that might call this are rare
@@ -1290,17 +1466,12 @@
{
// 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 = { 12, &dyldGlobalLockAcquire, &dyldGlobalLockRelease,
+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,
@@ -1310,29 +1481,71 @@
&hasPerThreadBufferFor_dlerror,
&isLaunchdOwned,
&vm_allocate,
- &mmap};
-
-
+ &mmap,
+ &__cxa_finalize_ranges
+ };
+
+static const objc_opt::objc_opt_t* gObjCOpt = nullptr;
//
// during initialization of libSystem this routine will run
// and call dyld, registering the helper functions.
//
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(&sHelpers);
-
+ // Get the optimized objc pointer now that the cache is loaded
+ const dyld_all_image_infos* allInfo = _dyld_get_all_image_infos();
+ if ( allInfo != nullptr ) {
+ const DyldSharedCache* cache = (const DyldSharedCache*)(allInfo->sharedCacheBaseAddress);
+ if ( cache != nullptr )
+ gObjCOpt = cache->objcOpt();
+ }
+
+ if ( gUseDyld3 ) {
+ dyld3::gAllImages.applyInitialImages();
+#if TARGET_OS_IOS && !TARGET_OS_SIMULATOR
+ // For binaries built before 13.0, set the lookup function if they need it
+ if (dyld_get_program_sdk_version() < DYLD_PACKED_VERSION(13,0,0))
+ setLookupFunc((void*)&dyld3::compatFuncLookup);
+#endif
+ }
+ else {
+ _dyld_func_lookup("__dyld_register_thread_helpers", (void**)&p);
+ if(p != NULL)
+ p(&sHelpers);
+ }
+
tlv_initializer();
}
-
+int dladdr(const void* addr, Dl_info* info)
+{
+ dyld3::ScopedTimer timer(DBG_DYLD_TIMING_DLADDR, (uint64_t)addr, 0, 0);
+ int result = 0;
+ if ( gUseDyld3 ) {
+ result = dyld3::dladdr(addr, info);
+ } else {
+ DYLD_LOCK_THIS_BLOCK;
+ static int (*p)(const void* , Dl_info*) = NULL;
+
+ if(p == NULL)
+ _dyld_func_lookup("__dyld_dladdr", (void**)&p);
+ result = p(addr, info);
+ }
+ timer.setData4(result);
+ timer.setData5(info != NULL ? info->dli_fbase : 0);
+ timer.setData6(info != NULL ? info->dli_saddr : 0);
+ return result;
+}
+
+#if !TARGET_OS_DRIVERKIT
char* dlerror()
{
+ if ( gUseDyld3 )
+ return dyld3::dlerror();
+
DYLD_LOCK_THIS_BLOCK;
static char* (*p)() = NULL;
@@ -1341,78 +1554,126 @@
return(p());
}
-int dladdr(const void* addr, Dl_info* info)
-{
- DYLD_LOCK_THIS_BLOCK;
- static int (*p)(const void* , Dl_info*) = NULL;
-
- if(p == NULL)
- _dyld_func_lookup("__dyld_dladdr", (void**)&p);
- return(p(addr, info));
-}
-
int dlclose(void* handle)
{
+ dyld3::ScopedTimer timer(DBG_DYLD_TIMING_DLCLOSE, (uint64_t)handle, 0, 0);
+ int result = 0;
+ if ( gUseDyld3 ) {
+ timer.setData4(result);
+ return dyld3::dlclose(handle);
+ }
+
DYLD_LOCK_THIS_BLOCK;
static int (*p)(void* handle) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_dlclose", (void**)&p);
- return(p(handle));
+ result = p(handle);
+ timer.setData4(result);
+ return result;
+}
+
+static void* dlopen_internal(const char* path, int mode, void* callerAddress)
+{
+ dyld3::ScopedTimer timer(DBG_DYLD_TIMING_DLOPEN, path, mode, 0);
+ void* result = nullptr;
+ if ( gUseDyld3 ) {
+ result = dyld3::dlopen_internal(path, mode, callerAddress);
+ timer.setData4(result);
+ return result;
+ }
+
+ // 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, void*) = NULL;
+
+ if(p == NULL)
+ _dyld_func_lookup("__dyld_dlopen_internal", (void**)&p);
+ result = p(path, mode, callerAddress);
+ // 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("");
+ timer.setData4(result);
+
+ return result;
}
void* dlopen(const char* path, int mode)
-{
- // 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);
- 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;
-}
+{
+ void* result = dlopen_internal(path, mode, __builtin_return_address(0));
+ if ( result )
+ return result;
+
+
+ return nullptr;
+}
+
+void* dlopen_from(const char* path, int mode, void* addressInCaller)
+{
+#if __has_feature(ptrauth_calls)
+ addressInCaller = __builtin_ptrauth_strip(addressInCaller, ptrauth_key_asia);
+#endif
+ return dlopen_internal(path, mode, addressInCaller);
+}
+
+#if !__i386__
+void* dlopen_audited(const char* path, int mode)
+{
+ return dlopen(path, mode);
+}
+#endif // !__i386__
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));
+ dyld3::ScopedTimer timer(DBG_DYLD_TIMING_DLOPEN_PREFLIGHT, path, 0, 0);
+ bool result = false;
+
+ if ( gUseDyld3 ) {
+ result = dyld3::dlopen_preflight_internal(path);
+ timer.setData4(result);
+ return result;
+ }
+
+ DYLD_LOCK_THIS_BLOCK;
+ static bool (*p)(const char* path, void* callerAddress) = NULL;
+
+ if(p == NULL)
+ _dyld_func_lookup("__dyld_dlopen_preflight_internal", (void**)&p);
+ result = p(path, __builtin_return_address(0));
+ timer.setData4(result);
+ return result;
}
void* dlsym(void* handle, const char* symbol)
{
- DYLD_LOCK_THIS_BLOCK;
- static void* (*p)(void* handle, const char* symbol) = NULL;
-
- if(p == NULL)
- _dyld_func_lookup("__dyld_dlsym", (void**)&p);
- return(p(handle, symbol));
-}
-
-void dyld_register_image_state_change_handler(dyld_image_states state,
- bool batch, dyld_image_state_change_handler handler)
-{
- DYLD_LOCK_THIS_BLOCK;
- static void* (*p)(dyld_image_states, bool, dyld_image_state_change_handler) = NULL;
-
- if(p == NULL)
- _dyld_func_lookup("__dyld_dyld_register_image_state_change_handler", (void**)&p);
- p(state, batch, handler);
-}
+ dyld3::ScopedTimer timer(DBG_DYLD_TIMING_DLSYM, handle, symbol, 0);
+ void* result = nullptr;
+
+ if ( gUseDyld3 ) {
+ result = dyld3::dlsym_internal(handle, symbol, __builtin_return_address(0));
+ timer.setData4(result);
+ return result;
+ }
+
+ DYLD_LOCK_THIS_BLOCK;
+ static void* (*p)(void* handle, const char* symbol, void *callerAddress) = NULL;
+
+ if(p == NULL)
+ _dyld_func_lookup("__dyld_dlsym_internal", (void**)&p);
+ result = p(handle, symbol, __builtin_return_address(0));
+ timer.setData4(result);
+ return result;
+}
+#endif // !TARGET_OS_DRIVERKIT
const struct dyld_all_image_infos* _dyld_get_all_image_infos()
{
+ if ( gUseDyld3 )
+ return dyld3::_dyld_get_all_image_infos();
+
DYLD_NO_LOCK_THIS_BLOCK;
static struct dyld_all_image_infos* (*p)() = NULL;
@@ -1421,9 +1682,12 @@
return p();
}
-#if !__arm__
+#if SUPPORT_ZERO_COST_EXCEPTIONS
bool _dyld_find_unwind_sections(void* addr, dyld_unwind_sections* info)
{
+ if ( gUseDyld3 )
+ return dyld3::_dyld_find_unwind_sections(addr, info);
+
DYLD_NO_LOCK_THIS_BLOCK;
static void* (*p)(void*, dyld_unwind_sections*) = NULL;
@@ -1434,7 +1698,7 @@
#endif
-#if __i386__ || __x86_64__ || __arm__
+#if __i386__ || __x86_64__ || __arm__ || __arm64__
__attribute__((visibility("hidden")))
void* _dyld_fast_stub_entry(void* loadercache, long lazyinfo)
{
@@ -1450,6 +1714,9 @@
const char* dyld_image_path_containing_address(const void* addr)
{
+ if ( gUseDyld3 )
+ return dyld3::dyld_image_path_containing_address(addr);
+
DYLD_NO_LOCK_THIS_BLOCK;
static const char* (*p)(const void*) = NULL;
@@ -1458,9 +1725,25 @@
return p(addr);
}
-#if __IPHONE_OS_VERSION_MIN_REQUIRED
+const struct mach_header* dyld_image_header_containing_address(const void* addr)
+{
+ if ( gUseDyld3 )
+ return dyld3::dyld_image_header_containing_address(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()
{
+ if ( gUseDyld3 )
+ return dyld3::dyld_shared_cache_some_image_overridden();
+
DYLD_NO_LOCK_THIS_BLOCK;
static bool (*p)() = NULL;
@@ -1468,11 +1751,136 @@
_dyld_func_lookup("__dyld_shared_cache_some_image_overridden", (void**)&p);
return p();
}
-#endif
-
+
+bool _dyld_get_shared_cache_uuid(uuid_t uuid)
+{
+ if ( gUseDyld3 )
+ return dyld3::_dyld_get_shared_cache_uuid(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);
+}
+
+const void* _dyld_get_shared_cache_range(size_t* length)
+{
+ if ( gUseDyld3 )
+ return dyld3::_dyld_get_shared_cache_range(length);
+
+ DYLD_NO_LOCK_THIS_BLOCK;
+ static const void* (*p)(size_t*) = NULL;
+
+ if(p == NULL)
+ _dyld_func_lookup("__dyld_get_shared_cache_range", (void**)&p);
+ return p(length);
+}
+
+bool _dyld_shared_cache_optimized()
+{
+ if ( gUseDyld3 )
+ return dyld3::_dyld_shared_cache_optimized();
+
+ const dyld_all_image_infos* allInfo = _dyld_get_all_image_infos();
+ if ( allInfo != nullptr ) {
+ const dyld_cache_header* cacheHeader = (dyld_cache_header*)(allInfo->sharedCacheBaseAddress);
+ if ( cacheHeader != nullptr )
+ return (cacheHeader->cacheType == kDyldSharedCacheTypeProduction);
+ }
+ return false;
+}
+
+bool _dyld_shared_cache_is_locally_built()
+{
+ if ( gUseDyld3 )
+ return dyld3::_dyld_shared_cache_is_locally_built();
+
+ const dyld_all_image_infos* allInfo = _dyld_get_all_image_infos();
+ if ( allInfo != nullptr ) {
+ const dyld_cache_header* cacheHeader = (dyld_cache_header*)(allInfo->sharedCacheBaseAddress);
+ if ( cacheHeader != nullptr )
+ return (cacheHeader->locallyBuiltCache == 1);
+ }
+ return false;
+}
+
+const char* _dyld_shared_cache_real_path(const char* path)
+{
+ const dyld_all_image_infos* allInfo = _dyld_get_all_image_infos();
+ if ( allInfo != nullptr ) {
+ const DyldSharedCache* cache = (const DyldSharedCache*)(allInfo->sharedCacheBaseAddress);
+ if ( cache != nullptr )
+ return cache->getCanonicalPath(path);
+ }
+ return nullptr;
+}
+
+bool _dyld_shared_cache_contains_path(const char* path)
+{
+ return _dyld_shared_cache_real_path(path) != nullptr;
+}
+
+
+uint32_t _dyld_launch_mode()
+{
+ if ( gUseDyld3 )
+ return dyld3::_dyld_launch_mode();
+
+ // in dyld2 mode all flag bits are zero
+ return 0;
+}
+
+void _dyld_images_for_addresses(unsigned count, const void* addresses[], struct dyld_image_uuid_offset infos[])
+{
+ if ( gUseDyld3 )
+ return dyld3::_dyld_images_for_addresses(count, addresses, infos);
+
+ DYLD_NO_LOCK_THIS_BLOCK;
+ static const void (*p)(unsigned, const void*[], struct dyld_image_uuid_offset[]) = NULL;
+
+ if(p == NULL)
+ _dyld_func_lookup("__dyld_images_for_addresses", (void**)&p);
+ return p(count, addresses, infos);
+}
+
+void _dyld_register_for_image_loads(void (*func)(const mach_header* mh, const char* path, bool unloadable))
+{
+ if ( gUseDyld3 )
+ return dyld3::_dyld_register_for_image_loads(func);
+
+ DYLD_NO_LOCK_THIS_BLOCK;
+ static const void (*p)(void (*)(const mach_header* mh, const char* path, bool unloadable)) = NULL;
+
+ if(p == NULL)
+ _dyld_func_lookup("__dyld_register_for_image_loads", (void**)&p);
+ return p(func);
+}
+
+void _dyld_register_for_bulk_image_loads(void (*func)(unsigned imageCount, const struct mach_header* mhs[], const char* paths[]))
+{
+ if ( gUseDyld3 )
+ return dyld3::_dyld_register_for_bulk_image_loads(func);
+
+ DYLD_NO_LOCK_THIS_BLOCK;
+ static const void (*p)(void (*)(unsigned imageCount, const mach_header* mhs[], const char* paths[])) = NULL;
+
+ if(p == NULL)
+ _dyld_func_lookup("__dyld_register_for_bulk_image_loads", (void**)&p);
+ return p(func);
+}
+
+bool dyld_need_closure(const char* execPath, const char* dataContainerRootDir)
+{
+ return dyld3::dyld_need_closure(execPath, dataContainerRootDir);
+}
bool dyld_process_is_restricted()
{
+ if ( gUseDyld3 )
+ return dyld3::dyld_process_is_restricted();
+
DYLD_NO_LOCK_THIS_BLOCK;
static bool (*p)() = NULL;
@@ -1481,12 +1889,72 @@
return p();
}
-
-
+const char* dyld_shared_cache_file_path()
+{
+ if ( gUseDyld3 )
+ return dyld3::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();
+}
+
+bool dyld_has_inserted_or_interposing_libraries()
+{
+ if ( gUseDyld3 )
+ return dyld3::dyld_has_inserted_or_interposing_libraries();
+
+ DYLD_NO_LOCK_THIS_BLOCK;
+ static bool (*p)() = NULL;
+
+ if (p == NULL)
+ _dyld_func_lookup("__dyld_has_inserted_or_interposing_libraries", (void**)&p);
+ return p();
+}
+
+bool _dyld_has_fix_for_radar(const char *rdar) {
+ // There is no point in shimming this to dyld3, actual functionality can exist purely in libSystem for
+ // both dyld2 and dyld3.
+ return false;
+}
+
+
+void dyld_dynamic_interpose(const struct mach_header* mh, const struct dyld_interpose_tuple array[], size_t count)
+{
+ if ( gUseDyld3 )
+ return dyld3::dyld_dynamic_interpose(mh, array, 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_atfork_prepare()
+{
+ if ( gUseDyld3 )
+ return dyld3::_dyld_atfork_prepare();
+}
+
+// SPI called __fork
+void _dyld_atfork_parent()
+{
+ if ( gUseDyld3 )
+ return dyld3::_dyld_atfork_parent();
+}
// SPI called __fork
void _dyld_fork_child()
{
+ if ( gUseDyld3 )
+ return dyld3::_dyld_fork_child();
+
DYLD_NO_LOCK_THIS_BLOCK;
static void (*p)() = NULL;
@@ -1497,4 +1965,271 @@
-
+static void* mapStartOfCache(const char* path, size_t length)
+{
+ struct stat statbuf;
+ if ( dyld3::stat(path, &statbuf) == -1 )
+ return NULL;
+
+ if ( (size_t)statbuf.st_size < length )
+ return NULL;
+
+ int cache_fd = dyld3::open(path, O_RDONLY, 0);
+ 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, "dyld_", 5) != 0) || (::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))
+{
+ if ( gUseDyld3 )
+ return dyld3::dyld_shared_cache_find_iterate_text(cacheUuid, extraSearchDirs, callback);
+
+ 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) && (allInfo->sharedCacheBaseAddress != 0) && (memcmp(allInfo->sharedCacheUUID, cacheUuid, 16) == 0) ) {
+ // requested cache is already mapped, just re-use it
+ cacheHeader = (dyld_cache_header*)(allInfo->sharedCacheBaseAddress);
+ needToUnmap = false;
+ }
+ else {
+ // look first is default location for cache files
+ #if TARGET_OS_IPHONE
+ cacheHeader = findCacheInDirAndMap(cacheUuid, IPHONE_DYLD_SHARED_CACHE_DIR);
+ #else
+ cacheHeader = findCacheInDirAndMap(cacheUuid, MACOSX_MRM_DYLD_SHARED_CACHE_DIR);
+ #endif
+ // 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 <= __offsetof(dyld_cache_header, imagesTextOffset) ) {
+ // 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_mapping_info* mappings = (dyld_cache_mapping_info*)((char*)cacheHeader + cacheHeader->mappingOffset);
+ const uint64_t cacheUnslidBaseAddress = mappings[0].address;
+ 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 = 2;
+ dylibTextInfo.loadAddressUnslid = p->loadAddress;
+ dylibTextInfo.textSegmentSize = p->textSegmentSize;
+ dylibTextInfo.path = (char*)cacheHeader + p->pathOffset;
+ ::memcpy(dylibTextInfo.dylibUuid, p->uuid, 16);
+ dylibTextInfo.textSegmentOffset = p->loadAddress - cacheUnslidBaseAddress;
+ 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))
+{
+ if ( gUseDyld3 )
+ return dyld3::dyld_shared_cache_iterate_text(cacheUuid, callback);
+
+ 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)
+{
+ if ( gUseDyld3 )
+ return dyld3::_dyld_is_memory_immutable(addr, 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)
+{
+ if ( gUseDyld3 )
+ return dyld3::_dyld_objc_notify_register(mapped, init, 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);
+}
+
+void _dyld_missing_symbol_abort()
+{
+ return dyld3::_dyld_missing_symbol_abort();
+}
+
+const char* _dyld_get_objc_selector(const char* selName)
+{
+ // Check the shared cache table if it exists.
+ if ( gObjCOpt != nullptr ) {
+ if ( const objc_opt::objc_selopt_t* selopt = gObjCOpt->selopt() ) {
+ const char* name = selopt->get(selName);
+ if (name != nullptr)
+ return name;
+ }
+ }
+
+ if ( gUseDyld3 )
+ return dyld3::_dyld_get_objc_selector(selName);
+
+ return nullptr;
+}
+
+void _dyld_for_each_objc_class(const char* className,
+ void (^callback)(void* classPtr, bool isLoaded, bool* stop)) {
+ if ( gUseDyld3 )
+ return dyld3::_dyld_for_each_objc_class(className, callback);
+}
+
+void _dyld_for_each_objc_protocol(const char* protocolName,
+ void (^callback)(void* protocolPtr, bool isLoaded, bool* stop)) {
+ if ( gUseDyld3 )
+ return dyld3::_dyld_for_each_objc_protocol(protocolName, callback);
+}
+
+void _dyld_register_driverkit_main(void (*mainFunc)(void))
+{
+ if ( gUseDyld3 )
+ return dyld3::_dyld_register_driverkit_main(mainFunc);
+
+ static bool (*p)(void (*mainFunc)(void)) = NULL;
+
+ if(p == NULL)
+ _dyld_func_lookup("__dyld_register_driverkit_main", (void**)&p);
+ p(mainFunc);
+}
+
+// This is populated in the shared cache builder, so that the ranges are protected by __DATA_CONST
+// If we have a root, we can find this range in the shared cache libdyld at runtime
+typedef std::pair<const uint8_t*, const uint8_t*> ObjCConstantRange;
+
+#if TARGET_OS_OSX
+__attribute__((section(("__DATA, __objc_ranges"))))
+#else
+__attribute__((section(("__DATA_CONST, __objc_ranges"))))
+#endif
+__attribute__((used))
+static ObjCConstantRange gSharedCacheObjCConstantRanges[dyld_objc_string_kind + 1];
+
+static std::pair<const void*, uint64_t> getDyldCacheConstantRanges() {
+ const dyld_all_image_infos* allInfo = _dyld_get_all_image_infos();
+ if ( allInfo != nullptr ) {
+ const DyldSharedCache* cache = (const DyldSharedCache*)(allInfo->sharedCacheBaseAddress);
+ if ( cache != nullptr ) {
+ return cache->getObjCConstantRange();
+ }
+ }
+ return { nullptr, 0 };
+}
+
+bool _dyld_is_objc_constant(DyldObjCConstantKind kind, const void* addr) {
+ assert(kind <= dyld_objc_string_kind);
+ // The common case should be that the value is in range, as this is a security
+ // check, so first test against the values in the struct. If we have a root then
+ // we'll take the slow path later
+ if ( (addr >= gSharedCacheObjCConstantRanges[kind].first) && (addr < gSharedCacheObjCConstantRanges[kind].second) ) {
+ // Make sure that we are pointing at the start of a constant object, not in to the middle of it
+ uint64_t offset = (uint64_t)addr - (uint64_t)gSharedCacheObjCConstantRanges[kind].first;
+ return (offset % (uint64_t)DyldSharedCache::ConstantClasses::cfStringAtomSize) == 0;
+ }
+
+ // If we are in the shared cache, then the above check was sufficient, so this really isn't a valid constant address
+ extern void* __dso_handle;
+ const dyld3::MachOAnalyzer* ma = (const dyld3::MachOAnalyzer*)&__dso_handle;
+ if ( ma->inDyldCache() )
+ return false;
+
+ // We now know we are a root, so use the pointers in the shared cache libdyld version of gSharedCacheObjCConstantRanges
+ static std::pair<const void*, uint64_t> sharedCacheRanges = { nullptr, ~0ULL };
+
+ // FIXME: Should we fold this in as an inititalizer above?
+ // That would mean we need to link against somewhere to get ___cxa_guard_acquire/___cxa_guard_release
+ if ( sharedCacheRanges.second == ~0ULL )
+ sharedCacheRanges = getDyldCacheConstantRanges();
+
+ // We have the range of the section in libdyld in the shared cache, now get an array of ranges from it
+ uint64_t numRanges = sharedCacheRanges.second / sizeof(ObjCConstantRange);
+ if ( kind >= numRanges )
+ return false;
+
+ const ObjCConstantRange* rangeArrayBase = (const ObjCConstantRange*)sharedCacheRanges.first;
+ if ( (addr >= rangeArrayBase[kind].first) && (addr < rangeArrayBase[kind].second) ) {
+ // Make sure that we are pointing at the start of a constant object, not in to the middle of it
+ uint64_t offset = (uint64_t)addr - (uint64_t)rangeArrayBase[kind].first;
+ return (offset % (uint64_t)DyldSharedCache::ConstantClasses::cfStringAtomSize) == 0;
+ }
+ return false;
+}