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--- dyld/dyld-421.2/src/ImageLoaderMegaDylib.cpp
+++ dyld/dyld-750.5/src/ImageLoaderMegaDylib.cpp
@@ -39,16 +39,19 @@
#include <mach/mach.h>
#include <mach/thread_status.h>
#include <mach-o/loader.h>
+#include <mach-o/dyld_images.h>
#include <libkern/OSAtomic.h>
#include "ImageLoaderMegaDylib.h"
#include "ImageLoaderMachO.h"
-#include "mach-o/dyld_images.h"
#include "dyldLibSystemInterface.h"
-#include "dyld.h"
+#include "Tracing.h"
+#include "dyld2.h"
// from dyld_gdb.cpp
extern void addImagesToAllImages(uint32_t infoCount, const dyld_image_info info[]);
+
+extern "C" int _dyld_func_lookup(const char* name, void** address);
#ifndef EXPORT_SYMBOL_FLAGS_KIND_ABSOLUTE
@@ -77,9 +80,9 @@
#if SUPPORT_ACCELERATE_TABLES
-ImageLoaderMegaDylib* ImageLoaderMegaDylib::makeImageLoaderMegaDylib(const dyld_cache_header* header, long slide, const LinkContext& context)
-{
- return new ImageLoaderMegaDylib(header, slide, context);
+ImageLoaderMegaDylib* ImageLoaderMegaDylib::makeImageLoaderMegaDylib(const dyld_cache_header* header, long slide, const macho_header* mainMH, const LinkContext& context)
+{
+ return new ImageLoaderMegaDylib(header, slide, mainMH, context);
}
struct DATAdyld {
@@ -91,7 +94,7 @@
-ImageLoaderMegaDylib::ImageLoaderMegaDylib(const dyld_cache_header* header, long slide, const LinkContext& context)
+ImageLoaderMegaDylib::ImageLoaderMegaDylib(const dyld_cache_header* header, long slide, const macho_header* mainMH, const LinkContext& context)
: ImageLoader("dyld shared cache", 0), _header(header), _linkEditBias(NULL), _slide(slide),
_lockArray(NULL), _lockArrayInUseCount(0)
{
@@ -123,7 +126,7 @@
DATAdyld* dyldSection = (DATAdyld*)(accHeader->dyldSectionAddr + slide);
dyldSection->dyldLazyBinder = NULL; // not used by libdyld.dylib
dyldSection->dyldFuncLookup = (void*)&_dyld_func_lookup;
- dyldSection->vars.mh = context.mainExecutable->machHeader();
+ dyldSection->vars.mh = mainMH;
context.setNewProgramVars(dyldSection->vars);
}
@@ -265,10 +268,21 @@
if ( hasDylib(path, &index) )
return index;
- // <rdar://problem/26934069> Somehow we found the dylib in the cache, but it is not this literal string, try simple expansions of @rpath
- if ( strncmp(path, "@rpath/", 7) == 0 ) {
+ if ( strncmp(path, "@rpath/libswift", 15) == 0 ) {
+ // <rdar://problem/51352017> a stable swift app built to run on pre-iOS-12.2 will use @rpath to reference swift dylibs in OS
+ const char* trailingPath = &path[7];
+ char possiblePath[strlen(trailingPath)+16];
+ strcpy(possiblePath, "/usr/lib/swift/");
+ strcat(possiblePath, trailingPath);
+ if ( hasDylib(possiblePath, &index) )
+ return index;
+ }
+ else if ( strncmp(path, "@rpath/", 7) == 0 ) {
+ // <rdar://problem/26934069> Somehow we found the dylib in the cache, but it is not this literal string, try simple expansions of @rpath
std::vector<const char*> rpathsFromMainExecutable;
context.mainExecutable->getRPaths(context, rpathsFromMainExecutable);
+ rpathsFromMainExecutable.push_back("/System/Library/Frameworks/");
+ rpathsFromMainExecutable.push_back("/usr/lib/swift/");
const char* trailingPath = &path[7];
for (const char* anRPath : rpathsFromMainExecutable) {
if ( anRPath[0] != '/' )
@@ -283,6 +297,18 @@
}
}
}
+ else {
+ // handle symlinks embedded in load commands
+ char resolvedPath[PATH_MAX];
+ realpath(path, resolvedPath);
+ int realpathErrno = errno;
+ // If realpath() resolves to a path which does not exist on disk, errno is set to ENOENT
+ if ( (realpathErrno == ENOENT) || (realpathErrno == 0) ) {
+ if ( strcmp(resolvedPath, path) != 0 )
+ return findImageIndex(context, resolvedPath);
+ }
+ }
+
dyld::throwf("no cache image with name (%s)", path);
}
@@ -351,7 +377,7 @@
segOffset = read_uleb128(p, end);
mh = (mach_header*)getIndexedMachHeader((unsigned)it.imageIndex);
if ( uintptr_t segPrefAddress = ImageLoaderMachO::segPreferredAddress(mh, segIndex) )
- it.address = segPrefAddress + segOffset + _slide;
+ it.address = segPrefAddress + (uintptr_t)segOffset + _slide;
else
dyld::throwf("BIND_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB has segment %d which is too large", segIndex);
break;
@@ -436,7 +462,7 @@
segOffset = read_uleb128(p, end);
mh = (mach_header*)getIndexedMachHeader((unsigned)it.imageIndex);
if ( uintptr_t segPrefAddress = ImageLoaderMachO::segPreferredAddress(mh, segIndex) )
- address = segPrefAddress + segOffset + _slide;
+ address = segPrefAddress + (uintptr_t)segOffset + _slide;
else
dyld::throwf("BIND_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB has segment %d which is too large", segIndex);
break;
@@ -444,17 +470,17 @@
address += read_uleb128(p, end);
break;
case BIND_OPCODE_DO_BIND:
- ImageLoaderMachO::bindLocation(context, address, value, type, symbolName, addend, getIndexedPath((unsigned)it.imageIndex), targetImagePath, "weak ");
+ ImageLoaderMachO::bindLocation(context, 0, address, value, type, symbolName, addend, getIndexedPath((unsigned)it.imageIndex), targetImagePath, "weak ", NULL, _slide);
boundSomething = true;
address += sizeof(intptr_t);
break;
case BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB:
- ImageLoaderMachO::bindLocation(context, address, value, type, symbolName, addend, getIndexedPath((unsigned)it.imageIndex), targetImagePath, "weak ");
+ ImageLoaderMachO::bindLocation(context, 0, address, value, type, symbolName, addend, getIndexedPath((unsigned)it.imageIndex), targetImagePath, "weak ", NULL, _slide);
boundSomething = true;
address += read_uleb128(p, end) + sizeof(intptr_t);
break;
case BIND_OPCODE_DO_BIND_ADD_ADDR_IMM_SCALED:
- ImageLoaderMachO::bindLocation(context, address, value, type, symbolName, addend, getIndexedPath((unsigned)it.imageIndex), targetImagePath, "weak ");
+ ImageLoaderMachO::bindLocation(context, 0, address, value, type, symbolName, addend, getIndexedPath((unsigned)it.imageIndex), targetImagePath, "weak ", NULL, _slide);
boundSomething = true;
address += immediate*sizeof(intptr_t) + sizeof(intptr_t);
break;
@@ -462,7 +488,7 @@
count = read_uleb128(p, end);
skip = read_uleb128(p, end);
for (uint32_t i=0; i < count; ++i) {
- ImageLoaderMachO::bindLocation(context, address, value, type, symbolName, addend, getIndexedPath((unsigned)it.imageIndex), targetImagePath, "weak ");
+ ImageLoaderMachO::bindLocation(context, 0, address, value, type, symbolName, addend, getIndexedPath((unsigned)it.imageIndex), targetImagePath, "weak ", NULL, _slide);
boundSomething = true;
address += skip + sizeof(intptr_t);
}
@@ -492,7 +518,7 @@
}
-bool ImageLoaderMegaDylib::weakSymbolsBound(unsigned index)
+bool ImageLoaderMegaDylib::weakSymbolsBound(unsigned index) const
{
return ( _stateFlags[index] >= kStateFlagWeakBound );
}
@@ -705,7 +731,7 @@
default:
dyld::throwf("unsupported exported symbol kind. flags=%lu at node=%p", flags, exportNode);
}
- dyld::throwf("unsupported exported symbol node=%p", exportNode);
+ //dyld::throwf("unsupported exported symbol node=%p", exportNode);
}
bool ImageLoaderMegaDylib::findInChainedTries(const LinkContext& context, const char* symbolName, unsigned definedImageIndex,
@@ -761,24 +787,32 @@
}
-bool ImageLoaderMegaDylib::flatFindSymbol(const char* name, bool onlyInCoalesced, const ImageLoader::Symbol** sym, const ImageLoader** image)
-{
+bool ImageLoaderMegaDylib::flatFindSymbol(const char* name, bool onlyInCoalesced, const ImageLoader::Symbol** sym, const ImageLoader** image, ImageLoader::CoalesceNotifier notifier)
+{
+ bool found = false;
// check export trie of all in-use images
for (unsigned i=0; i < _imageCount ; ++i) {
uint16_t imageIndex = _bottomUpArray[i];
if ( _stateFlags[imageIndex] == kStateUnused )
continue;
- if ( onlyInCoalesced && (_imageExtras[imageIndex].weakBindingsSize == 0) )
+ const macho_header* mh = getIndexedMachHeader(imageIndex);
+ if ( onlyInCoalesced && (mh->flags & MH_WEAK_DEFINES) == 0 )
continue;
const uint8_t* exportNode;
const uint8_t* exportTrieEnd;
if ( exportTrieHasNode(name, imageIndex, &exportNode, &exportTrieEnd) ) {
- *sym = (Symbol*)exportNode;
- *image = this;
- return true;
- }
- }
- return false;
+ if ( notifier )
+ notifier((Symbol*)exportNode, this, (mach_header*)getIndexedMachHeader(imageIndex));
+ if ( !found ) {
+ *sym = (Symbol*)exportNode;
+ *image = this;
+ found = true;
+ }
+ if ( !onlyInCoalesced )
+ return true;
+ }
+ }
+ return found;
}
@@ -827,7 +861,7 @@
void ImageLoaderMegaDylib::recursiveInitialization(const LinkContext& context, mach_port_t thisThread, unsigned int imageIndex,
- InitializerTimingList& timingInfo)
+ InitializerTimingList& timingInfo, UpwardIndexes& upInits)
{
// Don't do any locking until libSystem.dylib is initialized, so we can malloc() the lock array
bool useLock = dyld::gProcessInfo->libSystemInitialized;
@@ -846,7 +880,9 @@
unsigned subDepIndex = _dependenciesArray[i];
// ignore upward links
if ( (subDepIndex & 0x8000) == 0 )
- recursiveInitialization(context, thisThread, subDepIndex, timingInfo);
+ recursiveInitialization(context, thisThread, subDepIndex, timingInfo, upInits);
+ else
+ upInits.images[upInits.count++] = (subDepIndex & 0x7FFF);
}
// notify objc about this image
@@ -863,7 +899,10 @@
if ( context.verboseInit )
dyld::log("dyld: calling initializer function %p in %s\n", func, getIndexedPath(imageIndex));
bool haveLibSystemHelpersBefore = (dyld::gLibSystemHelpers != NULL);
- func(context.argc, context.argv, context.envp, context.apple, &context.programVars);
+ {
+ dyld3::ScopedTimer timer(DBG_DYLD_TIMING_STATIC_INITIALIZER, (uint64_t)getIndexedMachHeader(imageIndex), (uint64_t)func, 0);
+ func(context.argc, context.argv, context.envp, context.apple, &context.programVars);
+ };
bool haveLibSystemHelpersAfter = (dyld::gLibSystemHelpers != NULL);
ranSomeInitializers = true;
if ( !haveLibSystemHelpersBefore && haveLibSystemHelpersAfter ) {
@@ -892,11 +931,18 @@
void ImageLoaderMegaDylib::recursiveInitialization(const LinkContext& context, mach_port_t thisThread, const char* pathToInitialize,
- InitializerTimingList& timingInfo, UninitedUpwards& uninitUps)
-{
- unsigned imageIndex;
- if ( hasDylib(pathToInitialize, &imageIndex) ) {
- this->recursiveInitialization(context, thisThread, imageIndex, timingInfo);
+ InitializerTimingList& timingInfo, UninitedUpwards&)
+{
+ UpwardIndexes upsBuffer[256];
+ UpwardIndexes& ups = upsBuffer[0];
+ ups.count = 0;
+ unsigned imageIndex = findImageIndex(context, pathToInitialize);
+ this->recursiveInitialization(context, thisThread, imageIndex, timingInfo, ups);
+ for (int i=0; i < ups.count; ++i) {
+ UpwardIndexes upsBuffer2[256];
+ UpwardIndexes& ignoreUp = upsBuffer2[0];
+ ignoreUp.count = 0;
+ this->recursiveInitialization(context, thisThread, ups.images[i], timingInfo, ignoreUp);
}
}
@@ -935,9 +981,8 @@
uint8_t targetCacheState = dyldStateToCacheState(state);
if ( targetCacheState == kStateUnused )
return 0;
-
unsigned usedCount = 0;
- for (int i=_imageCount-1; i > 0; --i) {
+ for (int i=_imageCount-1; i >= 0; --i) {
uint16_t index = _bottomUpArray[i];
uint8_t imageState = _stateFlags[index];
if ( imageState == kStateFlagWeakBound )
@@ -982,7 +1027,17 @@
InitializerTimingList timingInfo[_initializerCount];
timingInfo[0].count = 0;
mach_port_t thisThread = mach_thread_self();
- this->recursiveInitialization(context, thisThread, imageIndex, timingInfo[0]);
+ UpwardIndexes upsBuffer[256]; // room for 511 dangling upward links
+ UpwardIndexes& ups = upsBuffer[0];
+ ups.count = 0;
+ this->recursiveInitialization(context, thisThread, imageIndex, timingInfo[0], ups);
+ // make sure any upward linked dylibs were initialized
+ for (int i=0; i < ups.count; ++i) {
+ UpwardIndexes upsBuffer2[256];
+ UpwardIndexes& ignoreUp = upsBuffer2[0];
+ ignoreUp.count = 0;
+ this->recursiveInitialization(context, thisThread, ups.images[i], timingInfo[0], ignoreUp);
+ }
mach_port_deallocate(mach_task_self(), thisThread);
context.notifyBatch(dyld_image_state_initialized, false);
}