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--- dyld/dyld-852.2/src/dyld_process_info.cpp
+++ dyld/dyld-635.2/src/dyld_process_info.cpp
@@ -22,7 +22,6 @@
* @APPLE_LICENSE_HEADER_END@
*/
-#include <dlfcn.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
@@ -33,11 +32,12 @@
#include <mach/mach_vm.h>
#include <mach/vm_region.h>
#include <libkern/OSAtomic.h>
-#include <mach-o/dyld_process_info.h>
-#include <mach-o/dyld_images.h>
-
-#include "MachOFile.h"
+
+#include "dyld_process_info.h"
#include "dyld_process_info_internal.h"
+#include "dyld_images.h"
+#include "dyld_priv.h"
+
#include "Tracing.h"
// this was in dyld_priv.h but it is no longer exported
@@ -45,110 +45,68 @@
const struct dyld_all_image_infos* _dyld_get_all_image_infos();
}
-RemoteBuffer& RemoteBuffer::operator=(RemoteBuffer&& other) {
- std::swap(_localAddress, other._localAddress);
- std::swap(_size, other._size);
- std::swap(_kr, other._kr);
- return *this;
-}
-
-RemoteBuffer::RemoteBuffer() : _localAddress(0), _size(0), _kr(KERN_SUCCESS) {}
-RemoteBuffer::RemoteBuffer(std::tuple<mach_vm_address_t,vm_size_t,kern_return_t> T)
- : _localAddress(std::get<0>(T)), _size(std::get<1>(T)), _kr(std::get<2>(T)) {}
-
-RemoteBuffer::RemoteBuffer(task_t task, mach_vm_address_t remote_address, size_t remote_size, bool allow_truncation)
-: RemoteBuffer(RemoteBuffer::create(task, remote_address, remote_size, allow_truncation)) {};
-
-std::pair<mach_vm_address_t, kern_return_t>
-RemoteBuffer::map(task_t task, mach_vm_address_t remote_address, vm_size_t size) {
- static kern_return_t (*mvrn)(vm_map_t, mach_vm_address_t*, mach_vm_size_t, mach_vm_offset_t, int, vm_map_read_t, mach_vm_address_t,
- boolean_t, vm_prot_t*, vm_prot_t*, vm_inherit_t) = nullptr;
+RemoteBuffer::RemoteBuffer() : _localAddress(0), _size(0) {}
+bool RemoteBuffer::map(task_t task, mach_vm_address_t remote_address, bool shared) {
vm_prot_t cur_protection = VM_PROT_NONE;
- vm_prot_t max_protection = VM_PROT_READ;
- if (size == 0) {
- return std::make_pair(MACH_VM_MIN_ADDRESS, KERN_INVALID_ARGUMENT);
- }
- mach_vm_address_t localAddress = 0;
-#if TARGET_OS_SIMULATOR
- static dispatch_once_t onceToken;
- dispatch_once(&onceToken, ^{
- mvrn = (kern_return_t (*)(vm_map_t, mach_vm_address_t*, mach_vm_size_t, mach_vm_offset_t, int, vm_map_read_t, mach_vm_address_t,
- boolean_t, vm_prot_t*, vm_prot_t*, vm_inherit_t))dlsym(RTLD_DEFAULT, "mach_vm_remap_new");
- if (mvrn == nullptr) {
- // We are running on a system that does not support task_read ports, use the old call
- mvrn = (kern_return_t (*)(vm_map_t, mach_vm_address_t*, mach_vm_size_t, mach_vm_offset_t, int, vm_map_read_t, mach_vm_address_t,
- boolean_t, vm_prot_t*, vm_prot_t*, vm_inherit_t))dlsym(RTLD_DEFAULT, "mach_vm_remap");
- }
- });
-#else
- mvrn = &mach_vm_remap_new;
-#endif
- auto kr = mvrn(mach_task_self(),
- &localAddress,
- size,
+ vm_prot_t max_protection = VM_PROT_NONE;
+ if (_size == 0) {
+ _kr = KERN_NO_SPACE;
+ return false;
+ }
+ _localAddress = 0;
+ _kr = mach_vm_remap(mach_task_self(),
+ &_localAddress,
+ _size,
0, // mask
- VM_FLAGS_ANYWHERE | VM_FLAGS_RESILIENT_CODESIGN | VM_FLAGS_RESILIENT_MEDIA,
+ VM_FLAGS_ANYWHERE | VM_FLAGS_RETURN_DATA_ADDR | (shared ? 0 : VM_FLAGS_RESILIENT_CODESIGN),
task,
remote_address,
- true,
+ !shared,
&cur_protection,
&max_protection,
VM_INHERIT_NONE);
- // The call is not succesfull return
- if (kr != KERN_SUCCESS) {
- return std::make_pair(MACH_VM_MIN_ADDRESS, kr);
- }
- // If it is not a shared buffer then copy it into a local buffer so our results are coherent in the event
- // the page goes way due to storage removal, etc. We have to do this because even after we read the page the
- // contents might go away of the object is paged out and then the backing region is disconnected (for example, if
- // we are copying some memory in the middle of a mach-o that is on a USB drive that is disconnected after we perform
- // the mapping). Once we copy them into a local buffer the memory will be handled by the default pager instead of
- // potentially being backed by the mmap pager, and thus will be guaranteed not to mutate out from under us.
- void* buffer = malloc(size);
- if (buffer == nullptr) {
- (void)vm_deallocate(mach_task_self(), (vm_address_t)localAddress, size);
- return std::make_pair(MACH_VM_MIN_ADDRESS, KERN_NO_SPACE);
- }
- memcpy(buffer, (void *)localAddress, size);
- (void)vm_deallocate(mach_task_self(), (vm_address_t)localAddress, size);
- return std::make_pair((vm_address_t)buffer, KERN_SUCCESS);
-}
-
-std::tuple<mach_vm_address_t,vm_size_t,kern_return_t> RemoteBuffer::create(task_t task,
- mach_vm_address_t remote_address,
- size_t size,
- bool allow_truncation) {
- mach_vm_address_t localAddress;
- kern_return_t kr;
+ dyld3::kdebug_trace_dyld_marker(DBG_DYLD_DEBUGGING_VM_REMAP, _localAddress, (uint64_t)_size, _kr, remote_address);
+ if (shared && (cur_protection != (VM_PROT_READ|VM_PROT_WRITE))) {
+ if (_kr == KERN_SUCCESS && _localAddress != 0) {
+ _kr = vm_deallocate(mach_task_self(), _localAddress, _size);
+ dyld3::kdebug_trace_dyld_marker(DBG_DYLD_DEBUGGING_VM_UNMAP, _localAddress, (uint64_t)_size, _kr, 0);
+ }
+ _localAddress = 0;
+ _kr = KERN_PROTECTION_FAILURE;
+ }
+ return (_kr == KERN_SUCCESS);
+}
+
+RemoteBuffer::RemoteBuffer(task_t task, mach_vm_address_t remote_address, size_t remote_size, bool shared, bool allow_truncation)
+ : _localAddress(0), _size(remote_size), _kr(KERN_SUCCESS) {
// Try the initial map
- std::tie(localAddress, kr) = map(task, remote_address, size);
- if (kr == KERN_SUCCESS) return std::make_tuple(localAddress, size, kr);
- // The first attempt failed, truncate if possible and try again. We only need to try once since the largest
- // truncatable buffer we map is less than a single page. To be more general we would need to try repeatedly in a
- // loop.
- if (allow_truncation) {
- size = PAGE_SIZE - remote_address%PAGE_SIZE;
- std::tie(localAddress, kr) = map(task, remote_address, size);
- if (kr == KERN_SUCCESS) return std::make_tuple(localAddress, size, kr);
- }
- // If we reach this then the mapping completely failed
- return std::make_tuple(MACH_VM_MIN_ADDRESS, 0, kr);
-}
-
+ if (map(task, remote_address, shared)) return;
+ // It failed, try to calculate the largest size that can fit in the same page as the remote_address
+ uint64_t newSize = PAGE_SIZE - remote_address%PAGE_SIZE;;
+ // If truncation is allowed and the newSize is different than the original size try that
+ if (!allow_truncation && newSize != _size) return;
+ _size = newSize;
+ if (map(task, remote_address, shared)) return;
+ // That did not work, null out the buffer
+ _size = 0;
+ _localAddress = 0;
+}
RemoteBuffer::~RemoteBuffer() {
- if (!_localAddress) { return; }
- free((void*)_localAddress);
-}
-void *RemoteBuffer::getLocalAddress() const { return (void *)_localAddress; }
-size_t RemoteBuffer::getSize() const { return _size; }
-kern_return_t RemoteBuffer::getKernelReturn() const { return _kr; }
-
-void withRemoteBuffer(task_t task, mach_vm_address_t remote_address, size_t remote_size, bool allow_truncation, kern_return_t *kr, void (^block)(void *buffer, size_t size)) {
+ if (_localAddress) {
+ _kr = vm_deallocate(mach_task_self(), _localAddress, _size);
+ dyld3::kdebug_trace_dyld_marker(DBG_DYLD_DEBUGGING_VM_UNMAP, _localAddress, (uint64_t)_size, _kr, 0);
+ }
+}
+void *RemoteBuffer::getLocalAddress() { return (void *)_localAddress; }
+size_t RemoteBuffer::getSize() { return _size; }
+kern_return_t RemoteBuffer::getKernelReturn() { return _kr; }
+
+void withRemoteBuffer(task_t task, mach_vm_address_t remote_address, size_t remote_size, bool shared, bool allow_truncation, kern_return_t *kr, void (^block)(void *buffer, size_t size)) {
kern_return_t krSink = KERN_SUCCESS;
if (kr == nullptr) {
kr = &krSink;
}
- RemoteBuffer buffer(task, remote_address, remote_size, allow_truncation);
+ RemoteBuffer buffer(task, remote_address, remote_size, shared, allow_truncation);
*kr = buffer.getKernelReturn();
if (*kr == KERN_SUCCESS) {
block(buffer.getLocalAddress(), buffer.getSize());
@@ -181,21 +139,11 @@
template<typename T>
static dyld_process_info_ptr makeSuspended(task_t task, const T& allImageInfo, kern_return_t* kr);
- std::atomic<uint32_t>& retainCount() const { return _retainCount; }
- dyld_process_cache_info* cacheInfo() const { return (dyld_process_cache_info*)(((char*)this) + _cacheInfoOffset); }
- dyld_process_aot_cache_info* aotCacheInfo() const { return (dyld_process_aot_cache_info*)(((char*)this) + _aotCacheInfoOffset); }
- dyld_process_state_info* stateInfo() const { return (dyld_process_state_info*)(((char*)this) + _stateInfoOffset); }
- dyld_platform_t platform() const { return _platform; }
-
- void forEachImage(void (^callback)(uint64_t machHeaderAddress, const uuid_t uuid, const char* path)) const;
- void forEachAotImage(bool (^callback)(uint64_t x86Address, uint64_t aotAddress, uint64_t aotSize, uint8_t* aotImageKey, size_t aotImageKeySize)) const;
- void forEachSegment(uint64_t machHeaderAddress, void (^callback)(uint64_t segmentAddress, uint64_t segmentSize, const char* segmentName)) const;
-
- bool reserveSpace(size_t space) {
- if (_freeSpace < space) { return false; }
- _freeSpace -= space;
- return true;
- }
+ std::atomic<uint32_t>& retainCount() const { return _retainCount; }
+ dyld_process_cache_info* cacheInfo() const { return (dyld_process_cache_info*)(((char*)this) + _cacheInfoOffset); }
+ dyld_process_state_info* stateInfo() const { return (dyld_process_state_info*)(((char*)this) + _stateInfoOffset); }
+ void forEachImage(void (^callback)(uint64_t machHeaderAddress, const uuid_t uuid, const char* path)) const;
+ void forEachSegment(uint64_t machHeaderAddress, void (^callback)(uint64_t segmentAddress, uint64_t segmentSize, const char* segmentName)) const;
void retain()
{
@@ -226,18 +174,16 @@
uint64_t size;
};
- dyld_process_info_base(dyld_platform_t platform, unsigned imageCount, unsigned aotImageCount, size_t totalSize);
+ dyld_process_info_base(unsigned imageCount, size_t totalSize);
void* operator new (size_t, void* buf) { return buf; }
static bool inCache(uint64_t addr) { return (addr > SHARED_REGION_BASE) && (addr < SHARED_REGION_BASE+SHARED_REGION_SIZE); }
- bool addImage(task_t task, bool sameCacheAsThisProcess, uint64_t imageAddress, uint64_t imagePath, const char* imagePathLocal);
-
- bool addAotImage(dyld_aot_image_info_64 aotImageInfo);
+ kern_return_t addImage(task_t task, bool sameCacheAsThisProcess, uint64_t imageAddress, uint64_t imagePath, const char* imagePathLocal);
kern_return_t addDyldImage(task_t task, uint64_t dyldAddress, uint64_t dyldPathAddress, const char* localPath);
bool invalid() { return ((char*)_stringRevBumpPtr < (char*)_curSegment); }
- const char* copyPath(task_t task, uint64_t pathAddr);
+ const char* copyPath(task_t task, uint64_t pathAddr, kern_return_t* kr);
const char* addString(const char*, size_t);
const char* copySegmentName(const char*);
@@ -249,17 +195,11 @@
mutable std::atomic<uint32_t> _retainCount;
const uint32_t _cacheInfoOffset;
- const uint32_t _aotCacheInfoOffset;
const uint32_t _stateInfoOffset;
const uint32_t _imageInfosOffset;
- const uint32_t _aotImageInfosOffset;
const uint32_t _segmentInfosOffset;
- size_t _freeSpace;
- dyld_platform_t _platform;
ImageInfo* const _firstImage;
ImageInfo* _curImage;
- dyld_aot_image_info_64* const _firstAotImage;
- dyld_aot_image_info_64* _curAotImage;
SegmentInfo* const _firstSegment;
SegmentInfo* _curSegment;
uint32_t _curSegmentIndex;
@@ -272,18 +212,13 @@
// char stringPool[]
};
-dyld_process_info_base::dyld_process_info_base(dyld_platform_t platform, unsigned imageCount, unsigned aotImageCount, size_t totalSize)
+dyld_process_info_base::dyld_process_info_base(unsigned imageCount, size_t totalSize)
: _retainCount(1), _cacheInfoOffset(sizeof(dyld_process_info_base)),
- _aotCacheInfoOffset(sizeof(dyld_process_info_base) + sizeof(dyld_process_cache_info)),
- _stateInfoOffset(sizeof(dyld_process_info_base) + sizeof(dyld_process_cache_info) + sizeof(dyld_process_aot_cache_info)),
- _imageInfosOffset(sizeof(dyld_process_info_base) + sizeof(dyld_process_cache_info) + sizeof(dyld_process_aot_cache_info) + sizeof(dyld_process_state_info)),
- _aotImageInfosOffset(sizeof(dyld_process_info_base) + sizeof(dyld_process_cache_info) + sizeof(dyld_process_aot_cache_info) + sizeof(dyld_process_state_info) + imageCount*sizeof(ImageInfo)),
- _segmentInfosOffset(sizeof(dyld_process_info_base) + sizeof(dyld_process_cache_info) + sizeof(dyld_process_aot_cache_info) + sizeof(dyld_process_state_info) + imageCount*sizeof(ImageInfo) + aotImageCount*sizeof(dyld_aot_image_info_64)),
- _freeSpace(totalSize), _platform(platform),
+ _stateInfoOffset(sizeof(dyld_process_info_base) + sizeof(dyld_process_cache_info)),
+ _imageInfosOffset(sizeof(dyld_process_info_base) + sizeof(dyld_process_cache_info) + sizeof(dyld_process_state_info)),
+ _segmentInfosOffset(sizeof(dyld_process_info_base) + sizeof(dyld_process_cache_info) + sizeof(dyld_process_state_info) + imageCount*sizeof(ImageInfo)),
_firstImage((ImageInfo*)(((uint8_t*)this) + _imageInfosOffset)),
_curImage((ImageInfo*)(((uint8_t*)this) + _imageInfosOffset)),
- _firstAotImage((dyld_aot_image_info_64*)(((uint8_t*)this) + _aotImageInfosOffset)),
- _curAotImage((dyld_aot_image_info_64*)(((uint8_t*)this) + _aotImageInfosOffset)),
_firstSegment((SegmentInfo*)(((uint8_t*)this) + _segmentInfosOffset)),
_curSegment((SegmentInfo*)(((uint8_t*)this) + _segmentInfosOffset)),
_curSegmentIndex(0),
@@ -309,11 +244,13 @@
if (result) {
// If it returned the process is suspended and there is nothing more to do
return std::move(result);
- }
- usleep(1000 * 50); // 50ms
- // Not exactly correct, but conveys that operation may succeed in the future
- *kr = KERN_RESOURCE_SHORTAGE;
- return nullptr;
+ } else {
+ // Check to see if the process change timestamp is greater than 0, if not then sleep to let the process
+ // finish initializing
+ if (allImageInfo.infoArrayChangeTimestamp == 0) {
+ usleep(1000 * 50); // 50ms
+ }
+ }
}
// Test to see if there are no changes and we can exit early
@@ -322,138 +259,120 @@
return nullptr;
}
- uint64_t currentTimestamp = allImageInfo.infoArrayChangeTimestamp;
- mach_vm_address_t infoArray = allImageInfo.infoArray;
- if (infoArray == 0) {
- usleep(1000 * 50); // 50ms
- // Not exactly correct, but conveys that operation may succeed in the future
- *kr = KERN_RESOURCE_SHORTAGE;
- return nullptr;
- };
-
- // For the moment we are going to truncate any image list longer than 8192 because some programs do
- // terrible things that corrupt their own image lists and we need to stop clients from crashing
- // reading them. We can try to do something more advanced in the future. rdar://27446361
- uint32_t imageCount = allImageInfo.infoArrayCount;
- imageCount = MIN(imageCount, 8192);
- size_t imageArraySize = imageCount * sizeof(T2);
-
- withRemoteBuffer(task, infoArray, imageArraySize, false, kr, ^(void *buffer, size_t size) {
- // figure out how many path strings will need to be copied and their size
- T2* imageArray = (T2 *)buffer;
- const dyld_all_image_infos* myInfo = _dyld_get_all_image_infos();
- bool sameCacheAsThisProcess = !allImageInfo.processDetachedFromSharedRegion
- && !myInfo->processDetachedFromSharedRegion
- && ((memcmp(myInfo->sharedCacheUUID, &allImageInfo.sharedCacheUUID[0], 16) == 0)
- && (myInfo->sharedCacheSlide == allImageInfo.sharedCacheSlide));
- unsigned countOfPathsNeedingCopying = 0;
- if ( sameCacheAsThisProcess ) {
+ for(uint32_t i = 0; i < 10; ++i) {
+ uint64_t currentTimestamp = allImageInfo.infoArrayChangeTimestamp;
+ mach_vm_address_t infoArray = allImageInfo.infoArray;
+ if (currentTimestamp == 0) continue;
+ if (infoArray == 0) {
+ // Check if the task is suspended mid dylib load and exit early
+ mach_task_basic_info ti;
+ mach_msg_type_number_t count = MACH_TASK_BASIC_INFO_COUNT;
+ if ((*kr = task_info(task, MACH_TASK_BASIC_INFO, (task_info_t)&ti, &count))) {
+ continue;
+ }
+
+ // The task is suspended, exit
+ if (ti.suspend_count != 0) {
+ // Not exactly correct, but conveys that operation may succeed in the future
+ *kr = KERN_RESOURCE_SHORTAGE;
+ return nullptr;
+ }
+ continue;
+ };
+
+ // For the moment we are going to truncate any image list longer than 8192 because some programs do
+ // terrible things that corrupt their own image lists and we need to stop clients from crashing
+ // reading them. We can try to do something more advanced in the future. rdar://27446361
+ uint32_t imageCount = allImageInfo.infoArrayCount;
+ imageCount = MIN(imageCount, 8192);
+ size_t imageArraySize = imageCount * sizeof(T2);
+
+ withRemoteBuffer(task, infoArray, imageArraySize, false, false, kr, ^(void *buffer, size_t size) {
+ // figure out how many path strings will need to be copied and their size
+ T2* imageArray = (T2 *)buffer;
+ const dyld_all_image_infos* myInfo = _dyld_get_all_image_infos();
+ bool sameCacheAsThisProcess = !allImageInfo.processDetachedFromSharedRegion
+ && !myInfo->processDetachedFromSharedRegion
+ && ((memcmp(myInfo->sharedCacheUUID, &allImageInfo.sharedCacheUUID[0], 16) == 0)
+ && (myInfo->sharedCacheSlide == allImageInfo.sharedCacheSlide));
+ unsigned countOfPathsNeedingCopying = 0;
+ if ( sameCacheAsThisProcess ) {
+ for (uint32_t i=0; i < imageCount; ++i) {
+ if ( !inCache(imageArray[i].imageFilePath) )
+ ++countOfPathsNeedingCopying;
+ }
+ }
+ else {
+ countOfPathsNeedingCopying = imageCount+1;
+ }
+ unsigned imageCountWithDyld = imageCount+1;
+
+ // allocate result object
+ size_t allocationSize = sizeof(dyld_process_info_base)
+ + sizeof(dyld_process_cache_info)
+ + sizeof(dyld_process_state_info)
+ + sizeof(ImageInfo)*(imageCountWithDyld)
+ + sizeof(SegmentInfo)*imageCountWithDyld*5
+ + countOfPathsNeedingCopying*PATH_MAX;
+ void* storage = malloc(allocationSize);
+ auto info = dyld_process_info_ptr(new (storage) dyld_process_info_base(imageCountWithDyld, allocationSize), deleter);
+ //info = new (storage) dyld_process_info_base(imageCountWithDyld, allocationSize); // placement new()
+
+ // fill in base info
+ dyld_process_cache_info* cacheInfo = info->cacheInfo();
+ memcpy(cacheInfo->cacheUUID, &allImageInfo.sharedCacheUUID[0], 16);
+ cacheInfo->cacheBaseAddress = allImageInfo.sharedCacheBaseAddress;
+ cacheInfo->privateCache = allImageInfo.processDetachedFromSharedRegion;
+ // if no cache is used, allImageInfo has all zeros for cache UUID
+ cacheInfo->noCache = true;
+ for (int i=0; i < 16; ++i) {
+ if ( cacheInfo->cacheUUID[i] != 0 ) {
+ cacheInfo->noCache = false;
+ }
+ }
+
+ dyld_process_state_info* stateInfo = info->stateInfo();
+ stateInfo->timestamp = currentTimestamp;
+ stateInfo->imageCount = imageCountWithDyld;
+ stateInfo->initialImageCount = (uint32_t)(allImageInfo.initialImageCount+1);
+ stateInfo->dyldState = dyld_process_state_dyld_initialized;
+
+ if ( allImageInfo.libSystemInitialized != 0 ) {
+ stateInfo->dyldState = dyld_process_state_libSystem_initialized;
+ if ( allImageInfo.initialImageCount != imageCount ) {
+ stateInfo->dyldState = dyld_process_state_program_running;
+ }
+ }
+ if ( allImageInfo.errorMessage != 0 ) {
+ stateInfo->dyldState = allImageInfo.terminationFlags ? dyld_process_state_terminated_before_inits : dyld_process_state_dyld_terminated;
+ }
+ // fill in info for dyld
+ if ( allImageInfo.dyldPath != 0 ) {
+ if ((*kr = info->addDyldImage(task, allImageInfo.dyldImageLoadAddress, allImageInfo.dyldPath, NULL))) {
+ result = nullptr;
+ return;
+ }
+ }
+ // fill in info for each image
for (uint32_t i=0; i < imageCount; ++i) {
- if ( !inCache(imageArray[i].imageFilePath) )
- ++countOfPathsNeedingCopying;
- }
- }
- else {
- countOfPathsNeedingCopying = imageCount+1;
- }
- unsigned imageCountWithDyld = imageCount+1;
-
- // allocate result object
- size_t allocationSize = sizeof(dyld_process_info_base)
- + sizeof(dyld_process_cache_info)
- + sizeof(dyld_process_aot_cache_info)
- + sizeof(dyld_process_state_info)
- + sizeof(ImageInfo)*(imageCountWithDyld)
- + sizeof(dyld_aot_image_info_64)*(allImageInfo.aotInfoCount) // add the size necessary for aot info to this buffer
- + sizeof(SegmentInfo)*imageCountWithDyld*10
- + countOfPathsNeedingCopying*PATH_MAX;
- void* storage = malloc(allocationSize);
- if (storage == nullptr) {
- *kr = KERN_NO_SPACE;
- result = nullptr;
- return;
- }
- auto info = dyld_process_info_ptr(new (storage) dyld_process_info_base(allImageInfo.platform, imageCountWithDyld, allImageInfo.aotInfoCount, allocationSize), deleter);
- (void)info->reserveSpace(sizeof(dyld_process_info_base)+sizeof(dyld_process_cache_info)+sizeof(dyld_process_state_info)+sizeof(dyld_process_aot_cache_info));
- (void)info->reserveSpace(sizeof(ImageInfo)*imageCountWithDyld);
-
- // fill in base info
- dyld_process_cache_info* cacheInfo = info->cacheInfo();
- memcpy(cacheInfo->cacheUUID, &allImageInfo.sharedCacheUUID[0], 16);
- cacheInfo->cacheBaseAddress = allImageInfo.sharedCacheBaseAddress;
- cacheInfo->privateCache = allImageInfo.processDetachedFromSharedRegion;
- // if no cache is used, allImageInfo has all zeros for cache UUID
- cacheInfo->noCache = true;
- for (int i=0; i < 16; ++i) {
- if ( cacheInfo->cacheUUID[i] != 0 ) {
- cacheInfo->noCache = false;
- }
- }
-
- // fill in aot shared cache info
- dyld_process_aot_cache_info* aotCacheInfo = info->aotCacheInfo();
- memcpy(aotCacheInfo->cacheUUID, &allImageInfo.aotSharedCacheUUID[0], 16);
- aotCacheInfo->cacheBaseAddress = allImageInfo.aotSharedCacheBaseAddress;
-
- dyld_process_state_info* stateInfo = info->stateInfo();
- stateInfo->timestamp = currentTimestamp;
- stateInfo->imageCount = imageCountWithDyld;
- stateInfo->initialImageCount = (uint32_t)(allImageInfo.initialImageCount+1);
- stateInfo->dyldState = dyld_process_state_dyld_initialized;
-
- if ( allImageInfo.libSystemInitialized != 0 ) {
- stateInfo->dyldState = dyld_process_state_libSystem_initialized;
- if ( allImageInfo.initialImageCount != imageCount ) {
- stateInfo->dyldState = dyld_process_state_program_running;
- }
- }
- if ( allImageInfo.errorMessage != 0 ) {
- stateInfo->dyldState = allImageInfo.terminationFlags ? dyld_process_state_terminated_before_inits : dyld_process_state_dyld_terminated;
- }
- // fill in info for dyld
- if ( allImageInfo.dyldPath != 0 ) {
- if ((*kr = info->addDyldImage(task, allImageInfo.dyldImageLoadAddress, allImageInfo.dyldPath, NULL))) {
+ if ((*kr = info->addImage(task, sameCacheAsThisProcess, imageArray[i].imageLoadAddress, imageArray[i].imageFilePath, NULL))) {
+ result = nullptr;
+ return;
+ }
+ }
+ // sanity check internal data did not overflow
+ if ( info->invalid() ) {
*kr = KERN_FAILURE;
result = nullptr;
return;
}
- }
- // fill in info for each image
- for (uint32_t i=0; i < imageCount; ++i) {
- if (!info->addImage(task, sameCacheAsThisProcess, imageArray[i].imageLoadAddress, imageArray[i].imageFilePath, NULL)) {
- *kr = KERN_FAILURE;
- result = nullptr;
- return;
- }
- }
- // sanity check internal data did not overflow
- if ( info->invalid() ) {
- *kr = KERN_FAILURE;
- result = nullptr;
- return;
- }
-
- result = std::move(info);
- });
-
- mach_vm_address_t aotImageArray = allImageInfo.aotInfoArray;
- // shortcircuit this code path if aotImageArray == 0 (32 vs 64 bit struct difference)
- // and if result == nullptr, since we need to append aot image infos to the process info struct
- if (aotImageArray != 0 && result != nullptr) {
- uint32_t aotImageCount = allImageInfo.aotInfoCount;
- size_t aotImageArraySize = aotImageCount * sizeof(dyld_aot_image_info_64);
-
- withRemoteBuffer(task, aotImageArray, aotImageArraySize, false, kr, ^(void *buffer, size_t size) {
- dyld_aot_image_info_64* imageArray = (dyld_aot_image_info_64*)buffer;
- for (uint32_t i = 0; i < aotImageCount; i++) {
- if (!result->addAotImage(imageArray[i])) {
- *kr = KERN_FAILURE;
- result = nullptr;
- return;
- }
- }
+
+ result = std::move(info);
});
- }
+
+ if (result) break;
+ }
+
return std::move(result);
}
@@ -476,14 +395,13 @@
return nullptr;
}
- __block unsigned imageCount = 0; // main executable and dyld
- __block uint64_t mainExecutableAddress = 0;
- __block uint64_t dyldAddress = 0;
- char dyldPathBuffer[PATH_MAX+1];
- char mainExecutablePathBuffer[PATH_MAX+1];
- __block char * dyldPath = &dyldPathBuffer[0];
- __block char * mainExecutablePath = &mainExecutablePathBuffer[0];
- __block dyld3::Platform platformID = dyld3::Platform::unknown;
+ __block unsigned imageCount = 0; // main executable and dyld
+ __block uint64_t mainExecutableAddress = 0;
+ __block uint64_t dyldAddress = 0;
+ char dyldPathBuffer[PATH_MAX+1];
+ char mainExecutablePathBuffer[PATH_MAX+1];
+ __block char * dyldPath = &dyldPathBuffer[0];
+ __block char * mainExecutablePath = &mainExecutablePathBuffer[0];
mach_vm_size_t size;
for (mach_vm_address_t address = 0; ; address += size) {
vm_region_basic_info_data_64_t info;
@@ -496,7 +414,7 @@
if ( info.protection != (VM_PROT_READ|VM_PROT_EXECUTE) )
continue;
// read start of vm region to verify it is a mach header
- withRemoteObject(task, address, NULL, ^(mach_header_64 mhBuffer){
+ withRemoteObject(task, address, false, NULL, ^(mach_header_64 mhBuffer){
if ( (mhBuffer.magic != MH_MAGIC) && (mhBuffer.magic != MH_MAGIC_64) )
return;
// now know the region is the start of a mach-o file
@@ -522,25 +440,15 @@
//fprintf(stderr, "dyld: addr=0x%llX, path=%s\n", dyldAddress, dyldPathBuffer);
//fprintf(stderr, "app: addr=0x%llX, path=%s\n", mainExecutableAddress, mainExecutablePathBuffer);
- // explicitly set aot image count to 0 in the suspended case
- unsigned aotImageCount = 0;
-
// allocate result object
size_t allocationSize = sizeof(dyld_process_info_base)
+ sizeof(dyld_process_cache_info)
- + sizeof(dyld_process_aot_cache_info)
+ sizeof(dyld_process_state_info)
+ sizeof(ImageInfo)*(imageCount)
- + sizeof(dyld_aot_image_info_64)*aotImageCount // this should always be 0, but including it here to be explicit
- + sizeof(SegmentInfo)*imageCount*10
+ + sizeof(SegmentInfo)*imageCount*5
+ imageCount*PATH_MAX;
void* storage = malloc(allocationSize);
- if (storage == nullptr) {
- *kr = KERN_NO_SPACE;
- return nullptr;
- }
- auto obj = dyld_process_info_ptr(new (storage) dyld_process_info_base((dyld_platform_t)platformID, imageCount, aotImageCount, allocationSize), deleter);
- (void)obj->reserveSpace(sizeof(dyld_process_info_base)+sizeof(dyld_process_cache_info)+sizeof(dyld_process_aot_cache_info)+sizeof(dyld_process_state_info));
+ auto obj = dyld_process_info_ptr(new (storage) dyld_process_info_base(imageCount, allocationSize), deleter);
// fill in base info
dyld_process_cache_info* cacheInfo = obj->cacheInfo();
bzero(cacheInfo->cacheUUID, 16);
@@ -548,11 +456,6 @@
cacheInfo->noCache = true;
cacheInfo->privateCache = false;
- // zero out aot cache info
- dyld_process_aot_cache_info* aotCacheInfo = obj->aotCacheInfo();
- bzero(aotCacheInfo->cacheUUID, 16);
- aotCacheInfo->cacheBaseAddress = 0;
-
dyld_process_state_info* stateInfo = obj->stateInfo();
stateInfo->timestamp = 0;
stateInfo->imageCount = imageCount;
@@ -568,7 +471,7 @@
// fill in info for each image
if ( mainExecutableAddress != 0 ) {
- if (!obj->addImage(task, false, mainExecutableAddress, 0, mainExecutablePath)) {
+ if ((*kr = obj->addImage(task, false, mainExecutableAddress, 0, mainExecutablePath))) {
return nullptr;
}
}
@@ -595,59 +498,49 @@
const char* dyld_process_info_base::addString(const char* str, size_t maxlen)
{
size_t len = strnlen(str, maxlen) + 1;
- // If we don't have enough space return an empty string
- if (!reserveSpace(len)) { return ""; }
_stringRevBumpPtr -= len;
strlcpy(_stringRevBumpPtr, str, len);
return _stringRevBumpPtr;
}
-const char* dyld_process_info_base::copyPath(task_t task, uint64_t stringAddressInTask)
-{
- __block const char* retval = "";
- withRemoteBuffer(task, stringAddressInTask, PATH_MAX, true, nullptr, ^(void *buffer, size_t size) {
+const char* dyld_process_info_base::copyPath(task_t task, uint64_t stringAddressInTask, kern_return_t* kr)
+{
+ __block const char* retval = NULL;
+ withRemoteBuffer(task, stringAddressInTask, PATH_MAX, false, true, kr, ^(void *buffer, size_t size) {
retval = addString(static_cast<const char *>(buffer), size);
});
return retval;
}
-bool dyld_process_info_base::addImage(task_t task, bool sameCacheAsThisProcess, uint64_t imageAddress, uint64_t imagePath, const char* imagePathLocal)
-{
+kern_return_t dyld_process_info_base::addImage(task_t task, bool sameCacheAsThisProcess, uint64_t imageAddress, uint64_t imagePath, const char* imagePathLocal)
+{
+ kern_return_t kr = KERN_SUCCESS;
_curImage->loadAddress = imageAddress;
_curImage->segmentStartIndex = _curSegmentIndex;
if ( imagePathLocal != NULL ) {
_curImage->path = addString(imagePathLocal, PATH_MAX);
- } else if ( sameCacheAsThisProcess && inCache(imagePath) ) {
+ }
+ else if ( sameCacheAsThisProcess && inCache(imagePath) ) {
_curImage->path = (const char*)imagePath;
- } else if (imagePath) {
- _curImage->path = copyPath(task, imagePath);
- } else {
- _curImage->path = "";
- }
-
+ }
+ else {
+ _curImage->path = copyPath(task, imagePath, &kr);
+ if ( kr != KERN_SUCCESS)
+ return kr;
+ }
if ( sameCacheAsThisProcess && inCache(imageAddress) ) {
addInfoFromLoadCommands((mach_header*)imageAddress, imageAddress, 32*1024);
- } else if (addInfoFromRemoteLoadCommands(task, imageAddress) != KERN_SUCCESS) {
- // The image is not here, return early
- return false;
+ }
+ else {
+ kr = addInfoFromRemoteLoadCommands(task, imageAddress);
+ if ( kr != KERN_SUCCESS)
+ return kr;
}
_curImage->segmentsCount = _curSegmentIndex - _curImage->segmentStartIndex;
_curImage++;
- return true;
-}
-
-bool dyld_process_info_base::addAotImage(dyld_aot_image_info_64 aotImageInfo) {
- if (!reserveSpace(sizeof(dyld_aot_image_info_64))) {
- return false;
- }
- _curAotImage->x86LoadAddress = aotImageInfo.x86LoadAddress;
- _curAotImage->aotLoadAddress = aotImageInfo.aotLoadAddress;
- _curAotImage->aotImageSize = aotImageInfo.aotImageSize;
- memcpy(_curAotImage->aotImageKey, aotImageInfo.aotImageKey, sizeof(aotImageInfo.aotImageKey));
-
- _curAotImage++;
- return true;
-}
+ return KERN_SUCCESS;
+}
+
kern_return_t dyld_process_info_base::addInfoFromRemoteLoadCommands(task_t task, uint64_t remoteMH) {
__block kern_return_t kr = KERN_SUCCESS;
@@ -655,7 +548,7 @@
__block bool done = false;
//Since the minimum we can reasonably map is a page, map that.
- withRemoteBuffer(task, remoteMH, PAGE_SIZE, false, &kr, ^(void * buffer, size_t size) {
+ withRemoteBuffer(task, remoteMH, PAGE_SIZE, false, false, &kr, ^(void * buffer, size_t size) {
const mach_header* mh = (const mach_header*)buffer;
headerPagesSize = sizeof(mach_header) + mh->sizeofcmds;
if (headerPagesSize <= PAGE_SIZE) {
@@ -669,7 +562,7 @@
if (kr != KERN_SUCCESS) {
return kr;
}
- withRemoteBuffer(task, remoteMH, headerPagesSize, false, &kr, ^(void * buffer, size_t size) {
+ withRemoteBuffer(task, remoteMH, headerPagesSize, false, false, &kr, ^(void * buffer, size_t size) {
addInfoFromLoadCommands((mach_header*)buffer, remoteMH, size);
});
}
@@ -686,7 +579,7 @@
_curImage->path = addString(localPath, PATH_MAX);
}
else {
- _curImage->path = copyPath(task, dyldPathAddress);
+ _curImage->path = copyPath(task, dyldPathAddress, &kr);
if ( kr != KERN_SUCCESS)
return kr;
}
@@ -723,7 +616,6 @@
memcpy(_curImage->uuid, uuidCmd->uuid, 16);
}
else if ( cmd->cmd == LC_SEGMENT ) {
- if (!reserveSpace(sizeof(SegmentInfo))) { break; }
const segment_command* segCmd = (segment_command*)cmd;
_curSegment->name = copySegmentName(segCmd->segname);
_curSegment->addr = segCmd->vmaddr;
@@ -732,7 +624,6 @@
_curSegmentIndex++;
}
else if ( cmd->cmd == LC_SEGMENT_64 ) {
- if (!reserveSpace(sizeof(SegmentInfo))) { break; }
const segment_command_64* segCmd = (segment_command_64*)cmd;
_curSegment->name = copySegmentName(segCmd->segname);
_curSegment->addr = segCmd->vmaddr;
@@ -747,13 +638,7 @@
const char* dyld_process_info_base::copySegmentName(const char* name)
{
// don't copy names of standard segments into string pool
- static const char* stdSegNames[] = {
- "__TEXT", "__DATA", "__LINKEDIT",
- "__DATA_DIRTY", "__DATA_CONST",
- "__OBJC", "__OBJC_CONST",
- "__AUTH", "__AUTH_CONST",
- NULL
- };
+ static const char* stdSegNames[] = {"__TEXT", "__DATA", "__LINKEDIT", "__DATA_DIRTY", "__DATA_CONST", "__OBJC", NULL };
for (const char** s=stdSegNames; *s != NULL; ++s) {
if ( strcmp(name, *s) == 0 )
return *s;
@@ -768,18 +653,6 @@
callback(p->loadAddress, p->uuid, p->path);
}
}
-
-
-#if TARGET_OS_OSX
-void dyld_process_info_base::forEachAotImage(bool (^callback)(uint64_t x86Address, uint64_t aotAddress, uint64_t aotSize, uint8_t* aotImageKey, size_t aotImageKeySize)) const
-{
- for (const dyld_aot_image_info_64* p = _firstAotImage; p < _curAotImage; ++p) {
- if (!callback(p->x86LoadAddress, p->aotLoadAddress, p->aotImageSize, (uint8_t*)p->aotImageKey, sizeof(p->aotImageKey))) {
- break;
- }
- }
-}
-#endif
void dyld_process_info_base::forEachSegment(uint64_t machHeaderAddress, void (^callback)(uint64_t segmentAddress, uint64_t segmentSize, const char* segmentName)) const
{
@@ -819,30 +692,29 @@
}
//The kernel will return MACH_VM_MIN_ADDRESS for an executable that has not had dyld loaded
- if (task_dyld_info.all_image_info_addr == MACH_VM_MIN_ADDRESS) {
- *kr = KERN_FAILURE;
+ if (task_dyld_info.all_image_info_addr == MACH_VM_MIN_ADDRESS)
return nullptr;
- }
-
- for (auto i = 0; i < 10; ++i) {
- withRemoteBuffer(task, task_dyld_info.all_image_info_addr, (size_t)task_dyld_info.all_image_info_size, false, kr, ^(void *buffer, size_t size) {
- dyld_process_info_ptr base;
- if (task_dyld_info.all_image_info_format == TASK_DYLD_ALL_IMAGE_INFO_32 ) {
- const dyld_all_image_infos_32* info = (const dyld_all_image_infos_32*)buffer;
- base = dyld_process_info_base::make<dyld_all_image_infos_32, dyld_image_info_32>(task, *info, timestamp, kr);
- } else {
- const dyld_all_image_infos_64* info = (const dyld_all_image_infos_64*)buffer;
- base = dyld_process_info_base::make<dyld_all_image_infos_64, dyld_image_info_64>(task, *info, timestamp, kr);
- }
- if (base) {
- if (result) {
- free((void*)result);
- }
- result = base.release();
- }
- });
- if (kr == KERN_SUCCESS) { break; }
- }
+
+ if ( task_dyld_info.all_image_info_size > sizeof(dyld_all_image_infos_64) )
+ return nullptr;
+
+ // We use a true shared memory buffer here, that way by making sure that libdyld in both processes
+ // reads and writes the the timestamp atomically we can make sure we get a coherent view of the
+ // remote process.
+ // That also means that we *MUST* directly read the memory, which is why we template the make() call
+ withRemoteBuffer(task, task_dyld_info.all_image_info_addr, task_dyld_info.all_image_info_size, true, false, kr, ^(void *buffer, size_t size) {
+ dyld_process_info_ptr base;
+ if (task_dyld_info.all_image_info_format == TASK_DYLD_ALL_IMAGE_INFO_32 ) {
+ const dyld_all_image_infos_32* info = (const dyld_all_image_infos_32*)buffer;
+ base = dyld_process_info_base::make<dyld_all_image_infos_32, dyld_image_info_32>(task, *info, timestamp, kr);
+ } else {
+ const dyld_all_image_infos_64* info = (const dyld_all_image_infos_64*)buffer;
+ base = dyld_process_info_base::make<dyld_all_image_infos_64, dyld_image_info_64>(task, *info, timestamp, kr);
+ }
+ if (base) {
+ result = base.release();
+ }
+ });
return result;
}
@@ -856,20 +728,11 @@
*cacheInfo = *info->cacheInfo();
}
-void _dyld_process_info_get_aot_cache(dyld_process_info info, dyld_process_aot_cache_info* aotCacheInfo)
-{
- *aotCacheInfo = *info->aotCacheInfo();
-}
-
void _dyld_process_info_retain(dyld_process_info object)
{
const_cast<dyld_process_info_base*>(object)->retain();
}
-dyld_platform_t _dyld_process_info_get_platform(dyld_process_info object) {
- return const_cast<dyld_process_info_base*>(object)->platform();
-}
-
void _dyld_process_info_release(dyld_process_info object)
{
const_cast<dyld_process_info_base*>(object)->release();
@@ -880,12 +743,6 @@
info->forEachImage(callback);
}
-#if TARGET_OS_OSX
-void _dyld_process_info_for_each_aot_image(dyld_process_info info, bool (^callback)(uint64_t x86Address, uint64_t aotAddress, uint64_t aotSize, uint8_t* aotImageKey, size_t aotImageKeySize))
-{
- info->forEachAotImage(callback);
-}
-#endif
void _dyld_process_info_for_each_segment(dyld_process_info info, uint64_t machHeaderAddress, void (^callback)(uint64_t segmentAddress, uint64_t segmentSize, const char* segmentName))
{