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--- dyld/dyld-195.6/src/ImageLoader.cpp
+++ dyld/dyld-239.3/src/ImageLoader.cpp
@@ -24,6 +24,7 @@
#define __STDC_LIMIT_MACROS
#include <stdint.h>
+#include <stdlib.h>
#include <errno.h>
#include <fcntl.h>
#include <mach/mach.h>
@@ -64,46 +65,35 @@
ImageLoader::ImageLoader(const char* path, unsigned int libCount)
- : fPath(path), fDevice(0), fInode(0), fLastModified(0),
- fPathHash(0), fDlopenReferenceCount(0), fStaticReferenceCount(0),
- fDynamicReferenceCount(0), fDynamicReferences(NULL), fInitializerRecursiveLock(NULL),
+ : fPath(path), fRealPath(NULL), fDevice(0), fInode(0), fLastModified(0),
+ fPathHash(0), fDlopenReferenceCount(0), fInitializerRecursiveLock(NULL),
fDepth(0), fLoadOrder(fgLoadOrdinal++), fState(0), fLibraryCount(libCount),
fAllLibraryChecksumsAndLoadAddressesMatch(false), fLeaveMapped(false), fNeverUnload(false),
fHideSymbols(false), fMatchByInstallName(false),
fInterposed(false), fRegisteredDOF(false), fAllLazyPointersBound(false),
fBeingRemoved(false), fAddFuncNotified(false),
- fPathOwnedByImage(false), fWeakSymbolsBound(false)
+ fPathOwnedByImage(false), fIsReferencedDownward(false),
+ fWeakSymbolsBound(false)
{
if ( fPath != NULL )
fPathHash = hash(fPath);
+ if ( libCount > 512 )
+ dyld::throwf("too many dependent dylibs in %s", path);
}
void ImageLoader::deleteImage(ImageLoader* image)
{
- // this cannot be done in destructor because libImage() is implemented
- // in a subclass
- DependentLibraryInfo libraryInfos[image->libraryCount()];
- image->doGetDependentLibraries(libraryInfos);
- for(unsigned int i=0; i < image->libraryCount(); ++i) {
- ImageLoader* lib = image->libImage(i);
- if ( (lib != NULL) && ! libraryInfos[i].upward )
- lib->fStaticReferenceCount--;
- }
delete image;
}
ImageLoader::~ImageLoader()
{
+ if ( fRealPath != NULL )
+ delete [] fRealPath;
if ( fPathOwnedByImage && (fPath != NULL) )
delete [] fPath;
- if ( fDynamicReferences != NULL ) {
- for (std::vector<const ImageLoader*>::iterator it = fDynamicReferences->begin(); it != fDynamicReferences->end(); ++it ) {
- const_cast<ImageLoader*>(*it)->fDynamicReferenceCount--;
- }
- delete fDynamicReferences;
- }
}
void ImageLoader::setFileInfo(dev_t device, ino_t inode, time_t modDate)
@@ -117,27 +107,6 @@
{
fState = dyld_image_state_mapped;
context.notifySingle(dyld_image_state_mapped, this); // note: can throw exception
-}
-
-void ImageLoader::addDynamicReference(const ImageLoader* target)
-{
- bool alreadyInVector = false;
- if ( fDynamicReferences == NULL ) {
- fDynamicReferences = new std::vector<const ImageLoader*>();
- }
- else {
- for (std::vector<const ImageLoader*>::iterator it = fDynamicReferences->begin(); it != fDynamicReferences->end(); ++it ) {
- if ( *it == target ) {
- alreadyInVector = true;
- break;
- }
- }
- }
- if ( ! alreadyInVector ) {
- fDynamicReferences->push_back(target);
- const_cast<ImageLoader*>(target)->fDynamicReferenceCount++;
- }
- //dyld::log("dyld: addDynamicReference() from %s to %s, fDynamicReferences->size()=%lu\n", this->getPath(), target->getPath(), fDynamicReferences->size());
}
int ImageLoader::compare(const ImageLoader* right) const
@@ -166,6 +135,7 @@
strcpy((char*)fPath, path);
fPathOwnedByImage = true; // delete fPath when this image is destructed
fPathHash = hash(fPath);
+ fRealPath = NULL;
}
void ImageLoader::setPathUnowned(const char* path)
@@ -176,6 +146,21 @@
fPath = path;
fPathOwnedByImage = false;
fPathHash = hash(fPath);
+}
+
+void ImageLoader::setPaths(const char* path, const char* realPath)
+{
+ this->setPath(path);
+ fRealPath = new char[strlen(realPath)+1];
+ strcpy((char*)fRealPath, realPath);
+}
+
+const char* ImageLoader::getRealPath() const
+{
+ if ( fRealPath != NULL )
+ return fRealPath;
+ else
+ return fPath;
}
@@ -243,8 +228,6 @@
bool ImageLoader::containsAddress(const void* addr) const
{
- if ( ! this->isLinked() )
- return false;
for(unsigned int i=0, e=segmentCount(); i < e; ++i) {
const uint8_t* start = (const uint8_t*)segActualLoadAddress(i);
const uint8_t* end = (const uint8_t*)segActualEndAddress(i);
@@ -287,6 +270,16 @@
}
+
+bool ImageLoader::dependsOn(ImageLoader* image) {
+ for(unsigned int i=0; i < libraryCount(); ++i) {
+ if ( libImage(i) == image )
+ return true;
+ }
+ return false;
+}
+
+
static bool notInImgageList(const ImageLoader* image, const ImageLoader** dsiStart, const ImageLoader** dsiCur)
{
for (const ImageLoader** p = dsiStart; p < dsiCur; ++p)
@@ -301,7 +294,6 @@
const ImageLoader** dsiStart, const ImageLoader**& dsiCur, const ImageLoader** dsiEnd, const ImageLoader** foundIn) const
{
const ImageLoader::Symbol* sym;
-
// search self
if ( notInImgageList(this, dsiStart, dsiCur) ) {
sym = this->findExportedSymbol(name, false, foundIn);
@@ -359,9 +351,9 @@
this->recursiveApplyInterposing(context);
}
-void ImageLoader::link(const LinkContext& context, bool forceLazysBound, bool preflightOnly, const RPathChain& loaderRPaths)
-{
- //dyld::log("ImageLoader::link(%s) refCount=%d, neverUnload=%d\n", this->getPath(), fStaticReferenceCount, fNeverUnload);
+void ImageLoader::link(const LinkContext& context, bool forceLazysBound, bool preflightOnly, bool neverUnload, const RPathChain& loaderRPaths)
+{
+ //dyld::log("ImageLoader::link(%s) refCount=%d, neverUnload=%d\n", this->getPath(), fDlopenReferenceCount, fNeverUnload);
// clear error strings
(*context.setErrorStrings)(dyld_error_kind_none, NULL, NULL, NULL);
@@ -383,10 +375,11 @@
context.notifyBatch(dyld_image_state_rebased);
uint64_t t3 = mach_absolute_time();
- this->recursiveBind(context, forceLazysBound);
+ this->recursiveBind(context, forceLazysBound, neverUnload);
uint64_t t4 = mach_absolute_time();
- this->weakBind(context);
+ if ( !context.linkingMainExecutable )
+ this->weakBind(context);
uint64_t t5 = mach_absolute_time();
context.notifyBatch(dyld_image_state_bound);
@@ -418,8 +411,7 @@
void ImageLoader::printReferenceCounts()
{
- dyld::log(" dlopen=%d, static=%d, dynamic=%d for %s\n",
- fDlopenReferenceCount, fStaticReferenceCount, fDynamicReferenceCount, getPath() );
+ dyld::log(" dlopen=%d for %s\n", fDlopenReferenceCount, getPath() );
}
@@ -468,6 +460,29 @@
}
+void ImageLoader::markedUsedRecursive(const std::vector<DynamicReference>& dynamicReferences)
+{
+ // already visited here
+ if ( fMarkedInUse )
+ return;
+ fMarkedInUse = true;
+
+ // clear mark on all statically dependent dylibs
+ for(unsigned int i=0; i < libraryCount(); ++i) {
+ ImageLoader* dependentImage = libImage(i);
+ if ( dependentImage != NULL ) {
+ dependentImage->markedUsedRecursive(dynamicReferences);
+ }
+ }
+
+ // clear mark on all dynamically dependent dylibs
+ for (std::vector<ImageLoader::DynamicReference>::const_iterator it=dynamicReferences.begin(); it != dynamicReferences.end(); ++it) {
+ if ( it->from == this )
+ it->to->markedUsedRecursive(dynamicReferences);
+ }
+
+}
+
unsigned int ImageLoader::recursiveUpdateDepth(unsigned int maxDepth)
{
// the purpose of this phase is to make the images sortable such that
@@ -481,7 +496,7 @@
unsigned int minDependentDepth = maxDepth;
for(unsigned int i=0; i < libraryCount(); ++i) {
ImageLoader* dependentImage = libImage(i);
- if ( dependentImage != NULL ) {
+ if ( (dependentImage != NULL) && !libIsUpward(i) ) {
unsigned int d = dependentImage->recursiveUpdateDepth(maxDepth);
if ( d < minDependentDepth )
minDependentDepth = d;
@@ -538,8 +553,11 @@
}
if ( fNeverUnload )
dependentLib->setNeverUnload();
- if ( ! requiredLibInfo.upward )
- dependentLib->fStaticReferenceCount += 1;
+ if ( requiredLibInfo.upward ) {
+ }
+ else {
+ dependentLib->fIsReferencedDownward = true;
+ }
LibraryInfo actualInfo = dependentLib->doGetLibraryInfo();
depLibReRequired = requiredLibInfo.required;
depLibCheckSumsMatch = ( actualInfo.checksum == requiredLibInfo.info.checksum );
@@ -549,7 +567,8 @@
depLibReExported = dependentLib->isSubframeworkOf(context, this) || this->hasSubLibrary(context, dependentLib);
}
// check found library version is compatible
- if ( actualInfo.minVersion < requiredLibInfo.info.minVersion ) {
+ // <rdar://problem/89200806> 0xFFFFFFFF is wildcard that matches any version
+ if ( (requiredLibInfo.info.minVersion != 0xFFFFFFFF) && (actualInfo.minVersion < requiredLibInfo.info.minVersion) ) {
// record values for possible use by CrashReporter or Finder
dyld::throwf("Incompatible library version: %s requires version %d.%d.%d or later, but %s provides version %d.%d.%d",
this->getShortName(), requiredLibInfo.info.minVersion >> 16, (requiredLibInfo.info.minVersion >> 8) & 0xff, requiredLibInfo.info.minVersion & 0xff,
@@ -582,7 +601,7 @@
(*context.setErrorStrings)(dyld_error_kind_dylib_wrong_arch, this->getPath(), requiredLibInfo.name, NULL);
else
(*context.setErrorStrings)(dyld_error_kind_dylib_missing, this->getPath(), requiredLibInfo.name, NULL);
- dyld::throwf("Library not loaded: %s\n Referenced from: %s\n Reason: %s", requiredLibInfo.name, this->getPath(), msg);
+ dyld::throwf("Library not loaded: %s\n Referenced from: %s\n Reason: %s", requiredLibInfo.name, this->getRealPath(), msg);
}
// ok if weak library not found
dependentLib = NULL;
@@ -676,7 +695,7 @@
-void ImageLoader::recursiveBind(const LinkContext& context, bool forceLazysBound)
+void ImageLoader::recursiveBind(const LinkContext& context, bool forceLazysBound, bool neverUnload)
{
// Normally just non-lazy pointers are bound immediately.
// The exceptions are:
@@ -691,13 +710,16 @@
for(unsigned int i=0; i < libraryCount(); ++i) {
ImageLoader* dependentImage = libImage(i);
if ( dependentImage != NULL )
- dependentImage->recursiveBind(context, forceLazysBound);
+ dependentImage->recursiveBind(context, forceLazysBound, neverUnload);
}
// bind this image
this->doBind(context, forceLazysBound);
// mark if lazys are also bound
if ( forceLazysBound || this->usablePrebinding(context) )
fAllLazyPointersBound = true;
+ // mark as never-unload if requested
+ if ( neverUnload )
+ this->setNeverUnload();
context.notifySingle(dyld_image_state_bound, this);
}
@@ -714,6 +736,7 @@
{
if ( context.verboseWeakBind )
dyld::log("dyld: weak bind start:\n");
+ uint64_t t1 = mach_absolute_time();
// get set of ImageLoaders that participate in coalecsing
ImageLoader* imagesNeedingCoalescing[fgImagesRequiringCoalescing];
int count = context.getCoalescedImages(imagesNeedingCoalescing);
@@ -819,6 +842,9 @@
imagesNeedingCoalescing[i]->fWeakSymbolsBound = true;
}
}
+ uint64_t t2 = mach_absolute_time();
+ fgTotalWeakBindTime += t2 - t1;
+
if ( context.verboseWeakBind )
dyld::log("dyld: weak bind end\n");
}
@@ -841,6 +867,19 @@
}
}
+void ImageLoader::setNeverUnloadRecursive() {
+ if ( ! fNeverUnload ) {
+ // break cycles
+ fNeverUnload = true;
+
+ // gather lower level libraries first
+ for(unsigned int i=0; i < libraryCount(); ++i) {
+ ImageLoader* dependentImage = libImage(i);
+ if ( dependentImage != NULL )
+ dependentImage->setNeverUnloadRecursive();
+ }
+ }
+}
void ImageLoader::recursiveSpinLock(recursive_lock& rlock)
{
@@ -872,20 +911,25 @@
// break cycles
fState = dyld_image_state_dependents_initialized-1;
try {
+ bool hasUpwards = false;
// initialize lower level libraries first
for(unsigned int i=0; i < libraryCount(); ++i) {
ImageLoader* dependentImage = libImage(i);
- if ( dependentImage != NULL )
- // don't try to initialize stuff "above" me
- if ( (dependentImage != NULL) && (dependentImage->fDepth >= fDepth) && !libIsUpward(i) )
- dependentImage->recursiveInitialization(context, this_thread, timingInfo);
+ if ( dependentImage != NULL ) {
+ // don't try to initialize stuff "above" me
+ bool isUpward = libIsUpward(i);
+ if ( (dependentImage->fDepth >= fDepth) && !isUpward ) {
+ dependentImage->recursiveInitialization(context, this_thread, timingInfo);
+ }
+ hasUpwards |= isUpward;
+ }
}
// record termination order
if ( this->needsTermination() )
context.terminationRecorder(this);
- // let objc know we are about to initalize this image
+ // let objc know we are about to initialize this image
uint64_t t1 = mach_absolute_time();
fState = dyld_image_state_dependents_initialized;
oldState = fState;
@@ -893,8 +937,20 @@
// initialize this image
bool hasInitializers = this->doInitialization(context);
-
- // let anyone know we finished initalizing this image
+
+ // <rdar://problem/10491874> initialize any upward depedencies
+ if ( hasUpwards ) {
+ for(unsigned int i=0; i < libraryCount(); ++i) {
+ ImageLoader* dependentImage = libImage(i);
+ // <rdar://problem/10643239> ObjC CG hang
+ // only init upward lib here if lib is not downwardly referenced somewhere
+ if ( (dependentImage != NULL) && libIsUpward(i) && !dependentImage->isReferencedDownward() ) {
+ dependentImage->recursiveInitialization(context, this_thread, timingInfo);
+ }
+ }
+ }
+
+ // let anyone know we finished initializing this image
fState = dyld_image_state_initialized;
oldState = fState;
context.notifySingle(dyld_image_state_initialized, this);
@@ -1035,5 +1091,8 @@
}
-
-
+VECTOR_NEVER_DESTRUCTED_IMPL(ImageLoader::InterposeTuple);
+VECTOR_NEVER_DESTRUCTED_IMPL(ImagePair);
+
+
+