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--- dyld/dyld-733.6/src/dyld_process_info.cpp
+++ /dev/null
@@ -1,838 +0,0 @@
-/* -*- mode: C++; c-basic-offset: 4; tab-width: 4 -*-
- *
- * Copyright (c) 2016 Apple Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- *
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
-
-#include <stdlib.h>
-#include <string.h>
-#include <limits.h>
-#include <stdio.h>
-#include <libproc.h>
-#include <sys/param.h>
-#include <mach/shared_region.h>
-#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_internal.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();
-}
-
-RemoteBuffer& RemoteBuffer::operator=(RemoteBuffer&& other) {
- std::swap(_localAddress, other._localAddress);
- std::swap(_size, other._size);
- std::swap(_kr, other._kr);
- std::swap(_shared, other._shared);
- return *this;
-}
-
-RemoteBuffer::RemoteBuffer() : _localAddress(0), _size(0), _kr(KERN_SUCCESS), _shared(false) {}
-RemoteBuffer::RemoteBuffer(std::tuple<mach_vm_address_t,vm_size_t,kern_return_t,bool> T)
- : _localAddress(std::get<0>(T)), _size(std::get<1>(T)), _kr(std::get<2>(T)), _shared(std::get<3>(T)) {}
-
-RemoteBuffer::RemoteBuffer(task_t task, mach_vm_address_t remote_address, size_t remote_size, bool shared, bool allow_truncation)
-: RemoteBuffer(RemoteBuffer::create(task, remote_address, remote_size, shared, 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, bool shared) {
- vm_prot_t cur_protection = VM_PROT_NONE;
- vm_prot_t max_protection = VM_PROT_NONE;
- int flags;
- if (size == 0) {
- return std::make_pair(MACH_VM_MIN_ADDRESS, KERN_INVALID_ARGUMENT);
- }
- if (shared) {
- flags = VM_FLAGS_ANYWHERE | VM_FLAGS_RETURN_DATA_ADDR;
- } else {
- // <rdar://55343677>
- // Since we are getting rid of the flag probing we have to make sure that simulator libdyld's do not use VM_FLAGS_RESILIENT_MEDIA
- // FIXME: Remove this when simulator builds do not support back deployment to 10.14
-#if TARGET_OS_SIMULATOR
- flags = VM_FLAGS_ANYWHERE | VM_FLAGS_RETURN_DATA_ADDR | VM_FLAGS_RESILIENT_CODESIGN;
-#else
- flags = VM_FLAGS_ANYWHERE | VM_FLAGS_RETURN_DATA_ADDR | VM_FLAGS_RESILIENT_CODESIGN | VM_FLAGS_RESILIENT_MEDIA;
-#endif
- }
- mach_vm_address_t localAddress = 0;
- auto kr = mach_vm_remap(mach_task_self(),
- &localAddress,
- size,
- 0, // mask
- flags,
- task,
- remote_address,
- !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.
- if (!shared) {
- void* buffer = malloc(size);
- if (buffer == nullptr) {
- (void)vm_deallocate(mach_task_self(), localAddress, size);
- return std::make_pair(MACH_VM_MIN_ADDRESS, kr);
- }
- memcpy(buffer, (void *)localAddress, size);
- (void)vm_deallocate(mach_task_self(), localAddress, size);
- return std::make_pair((vm_address_t)buffer, KERN_SUCCESS);
- }
- // A shared buffer was requested, if the permissions are not correct deallocate the region and return failure
- if (cur_protection != (VM_PROT_READ|VM_PROT_WRITE)) {
- if (localAddress != 0) {
- (void)vm_deallocate(mach_task_self(), (size_t)localAddress, size);
- }
- return std::make_pair(MACH_VM_MIN_ADDRESS, KERN_PROTECTION_FAILURE);
- }
- // We have a successfully created shared buffer with the correct permissions, return it
- return std::make_pair(localAddress, KERN_SUCCESS);
-}
-
-std::tuple<mach_vm_address_t,vm_size_t,kern_return_t,bool> RemoteBuffer::create(task_t task,
- mach_vm_address_t remote_address,
- size_t size,
- bool shared,
- bool allow_truncation) {
- mach_vm_address_t localAddress;
- kern_return_t kr;
- // Try the initial map
- std::tie(localAddress, kr) = map(task, remote_address, size, shared);
- if (kr == KERN_SUCCESS) return std::make_tuple(localAddress, size, kr, shared);
- // 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, shared);
- if (kr == KERN_SUCCESS) return std::make_tuple(localAddress, size, kr, shared);
- }
- // If we reach this then the mapping completely failed
- return std::make_tuple(MACH_VM_MIN_ADDRESS, 0, kr, shared);
-}
-
-RemoteBuffer::~RemoteBuffer() {
- if (!_localAddress) { return; }
-
- if (_shared) {
- (void)vm_deallocate(mach_task_self(), (vm_address_t)_localAddress, _size);
- } else {
- 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 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, shared, allow_truncation);
- *kr = buffer.getKernelReturn();
- if (*kr == KERN_SUCCESS) {
- block(buffer.getLocalAddress(), buffer.getSize());
- }
-}
-
-
-//
-// Opaque object returned by _dyld_process_info_create()
-//
-
-struct __attribute__((visibility("hidden"))) dyld_process_info_deleter { // deleter
- // dyld_process_info_deleter() {};
- // dyld_process_info_deleter(const dyld_process_info_deleter&) { }
- // dyld_process_info_deleter(dyld_process_info_deleter&) {}
- // dyld_process_info_deleter(dyld_process_info_deleter&&) {}
- void operator()(dyld_process_info_base* p) const {
- if (p) {
- free(p);
- }
- };
-};
-
-static dyld_process_info_deleter deleter;
-typedef std::unique_ptr<dyld_process_info_base, dyld_process_info_deleter> dyld_process_info_ptr;
-
-struct __attribute__((visibility("hidden"))) dyld_process_info_base {
- template<typename T1, typename T2>
- static dyld_process_info_ptr make(task_t task, const T1& allImageInfo, uint64_t timestamp, kern_return_t* kr);
- 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_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 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;
- }
-
- void retain()
- {
- _retainCount++;
- }
-
- void release()
- {
- uint32_t newCount = --_retainCount;
-
- if ( newCount == 0 ) {
- free(this);
- }
- }
-
-private:
- struct ImageInfo {
- uuid_t uuid;
- uint64_t loadAddress;
- const char* path;
- uint32_t segmentStartIndex;
- uint32_t segmentsCount;
- };
-
- struct SegmentInfo {
- const char* name;
- uint64_t addr;
- uint64_t size;
- };
-
- dyld_process_info_base(dyld_platform_t platform, 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);
-
- 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* addString(const char*, size_t);
- const char* copySegmentName(const char*);
-
- void addInfoFromLoadCommands(const mach_header* mh, uint64_t addressInTask, size_t size);
- kern_return_t addInfoFromRemoteLoadCommands(task_t task, uint64_t remoteMH);
-
- void inspectLocalImageLoadCommands(uint64_t imageAddress, void* func);
- kern_return_t inspectRemoteImageLoadCommands(task_t task, uint64_t imageAddress, void* func);
-
- mutable std::atomic<uint32_t> _retainCount;
- const uint32_t _cacheInfoOffset;
- const uint32_t _stateInfoOffset;
- const uint32_t _imageInfosOffset;
- const uint32_t _segmentInfosOffset;
- size_t _freeSpace;
- dyld_platform_t _platform;
- ImageInfo* const _firstImage;
- ImageInfo* _curImage;
- SegmentInfo* const _firstSegment;
- SegmentInfo* _curSegment;
- uint32_t _curSegmentIndex;
- char* _stringRevBumpPtr;
-
- // dyld_process_cache_info cacheInfo;
- // dyld_process_state_info stateInfo;
- // ImageInfo images[];
- // SegmentInfo segments[];
- // char stringPool[]
-};
-
-dyld_process_info_base::dyld_process_info_base(dyld_platform_t platform, unsigned imageCount, size_t totalSize)
- : _retainCount(1), _cacheInfoOffset(sizeof(dyld_process_info_base)),
- _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)),
- _freeSpace(totalSize), _platform(platform),
- _firstImage((ImageInfo*)(((uint8_t*)this) + _imageInfosOffset)),
- _curImage((ImageInfo*)(((uint8_t*)this) + _imageInfosOffset)),
- _firstSegment((SegmentInfo*)(((uint8_t*)this) + _segmentInfosOffset)),
- _curSegment((SegmentInfo*)(((uint8_t*)this) + _segmentInfosOffset)),
- _curSegmentIndex(0),
- _stringRevBumpPtr((char*)(this)+totalSize)
-{
-}
-
-template<typename T1, typename T2>
-dyld_process_info_ptr dyld_process_info_base::make(task_t task, const T1& allImageInfo, uint64_t timestamp, kern_return_t* kr)
-{
- __block dyld_process_info_ptr result = nullptr;
-
- // bail out of dyld is too old
- if ( allImageInfo.version < 15 ) {
- *kr = KERN_FAILURE;
- return nullptr;
- }
-
- // Check if the process is suspended
- if (allImageInfo.infoArrayChangeTimestamp == 0) {
- result = dyld_process_info_base::makeSuspended<T1>(task, allImageInfo, kr);
- // If we have a result return it, otherwise rescan
- if (result) {
- // If it returned the process is suspended and there is nothing more to do
- return std::move(result);
- } 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
- if (timestamp != 0 && timestamp == allImageInfo.infoArrayChangeTimestamp) {
- *kr = KERN_SUCCESS;
- return nullptr;
- }
-
- for (uint32_t j=0; j < 10; ++j) {
- 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);
- 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, allocationSize), deleter);
- (void)info->reserveSpace(sizeof(dyld_process_info_base)+sizeof(dyld_process_cache_info)+sizeof(dyld_process_state_info));
-
- // 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 (!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;
- }
-
- result = std::move(info);
- });
-
- if (result) break;
- }
-
- return std::move(result);
-}
-
-template<typename T>
-dyld_process_info_ptr dyld_process_info_base::makeSuspended(task_t task, const T& allImageInfo, kern_return_t* kr)
-{
- pid_t pid;
- if ((*kr = pid_for_task(task, &pid))) {
- return NULL;
- }
-
- 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))) {
- return nullptr;
- }
-
- // The task is not suspended, exit
- if (ti.suspend_count == 0) {
- 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;
- mach_vm_size_t size;
- for (mach_vm_address_t address = 0; ; address += size) {
- vm_region_basic_info_data_64_t info;
- mach_port_t objectName;
- unsigned int infoCount = VM_REGION_BASIC_INFO_COUNT_64;
- if (kern_return_t r = mach_vm_region(task, &address, &size, VM_REGION_BASIC_INFO,
- (vm_region_info_t)&info, &infoCount, &objectName)) {
- break;
- }
- 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, 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
- if ( mhBuffer.filetype == MH_EXECUTE ) {
- mainExecutableAddress = address;
- int len = proc_regionfilename(pid, mainExecutableAddress, mainExecutablePath, PATH_MAX);
- if ( len != 0 ) {
- mainExecutablePath[len] = '\0';
- }
- ++imageCount;
- }
- else if ( mhBuffer.filetype == MH_DYLINKER ) {
- dyldAddress = address;
- int len = proc_regionfilename(pid, dyldAddress, dyldPath, PATH_MAX);
- if ( len != 0 ) {
- dyldPath[len] = '\0';
- }
- ++imageCount;
- }
- });
- //fprintf(stderr, "vm region: addr=0x%llX, size=0x%llX, prot=0x%X\n", (uint64_t)address, (uint64_t)size, info.protection);
- }
- //fprintf(stderr, "dyld: addr=0x%llX, path=%s\n", dyldAddress, dyldPathBuffer);
- //fprintf(stderr, "app: addr=0x%llX, path=%s\n", mainExecutableAddress, mainExecutablePathBuffer);
-
- // allocate result object
- size_t allocationSize = sizeof(dyld_process_info_base)
- + sizeof(dyld_process_cache_info)
- + sizeof(dyld_process_state_info)
- + sizeof(ImageInfo)*(imageCount)
- + 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, allocationSize), deleter);
- (void)obj->reserveSpace(sizeof(dyld_process_info_base)+sizeof(dyld_process_cache_info)+sizeof(dyld_process_state_info));
- // fill in base info
- dyld_process_cache_info* cacheInfo = obj->cacheInfo();
- bzero(cacheInfo->cacheUUID, 16);
- cacheInfo->cacheBaseAddress = 0;
- cacheInfo->noCache = true;
- cacheInfo->privateCache = false;
-
- dyld_process_state_info* stateInfo = obj->stateInfo();
- stateInfo->timestamp = 0;
- stateInfo->imageCount = imageCount;
- stateInfo->initialImageCount = imageCount;
- stateInfo->dyldState = dyld_process_state_not_started;
-
- // fill in info for dyld
- if ( dyldAddress != 0 ) {
- if ((*kr = obj->addDyldImage(task, dyldAddress, 0, dyldPath))) {
- return nullptr;
- }
- }
-
- // fill in info for each image
- if ( mainExecutableAddress != 0 ) {
- if (!obj->addImage(task, false, mainExecutableAddress, 0, mainExecutablePath)) {
- return nullptr;
- }
- }
-
- if (allImageInfo.infoArrayChangeTimestamp != 0) {
- return nullptr;
- }
-
- count = MACH_TASK_BASIC_INFO_COUNT;
- if ((*kr = task_info(task, MACH_TASK_BASIC_INFO, (task_info_t)&ti, &count))) {
- return nullptr;
- }
-
- // The task is not suspended, exit
- if (ti.suspend_count == 0) {
- return nullptr;
- }
-
- return obj;
-}
-
-
-
-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, false, true, nullptr, ^(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)
-{
- if (!reserveSpace(sizeof(ImageInfo))) { return false; }
- _curImage->loadAddress = imageAddress;
- _curImage->segmentStartIndex = _curSegmentIndex;
- if ( imagePathLocal != NULL ) {
- _curImage->path = addString(imagePathLocal, PATH_MAX);
- } else if ( sameCacheAsThisProcess && inCache(imagePath) ) {
- _curImage->path = (const char*)imagePath;
- } else if (imagePath) {
- _curImage->path = copyPath(task, imagePath);
- } else {
- _curImage->path = "";
- }
-
- 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;
- }
- _curImage->segmentsCount = _curSegmentIndex - _curImage->segmentStartIndex;
- _curImage++;
- return true;
-}
-
-
-kern_return_t dyld_process_info_base::addInfoFromRemoteLoadCommands(task_t task, uint64_t remoteMH) {
- __block kern_return_t kr = KERN_SUCCESS;
- __block size_t headerPagesSize = 0;
- __block bool done = false;
-
- //Since the minimum we can reasonably map is a page, map that.
- 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) {
- addInfoFromLoadCommands(mh, remoteMH, size);
- done = true;
- }
- });
-
- //The load commands did not fit in the first page, but now we know the size, so remap and try again
- if (!done) {
- if (kr != KERN_SUCCESS) {
- return kr;
- }
- withRemoteBuffer(task, remoteMH, headerPagesSize, false, false, &kr, ^(void * buffer, size_t size) {
- addInfoFromLoadCommands((mach_header*)buffer, remoteMH, size);
- });
- }
-
- return kr;
-}
-
-kern_return_t dyld_process_info_base::addDyldImage(task_t task, uint64_t dyldAddress, uint64_t dyldPathAddress, const char* localPath)
-{
- if (!reserveSpace(sizeof(ImageInfo))) {
- // If we don't have ebnough spacee the data will be truncated, but well formed. Return success so
- // symbolicators can try and use it
- return KERN_SUCCESS;
- }
- __block kern_return_t kr = KERN_SUCCESS;
- _curImage->loadAddress = dyldAddress;
- _curImage->segmentStartIndex = _curSegmentIndex;
- if ( localPath != NULL ) {
- _curImage->path = addString(localPath, PATH_MAX);
- }
- else {
- _curImage->path = copyPath(task, dyldPathAddress);
- if ( kr != KERN_SUCCESS)
- return kr;
- }
-
- kr = addInfoFromRemoteLoadCommands(task, dyldAddress);
- if ( kr != KERN_SUCCESS)
- return kr;
-
- _curImage->segmentsCount = _curSegmentIndex - _curImage->segmentStartIndex;
- _curImage++;
- return KERN_SUCCESS;
-}
-
-
-void dyld_process_info_base::addInfoFromLoadCommands(const mach_header* mh, uint64_t addressInTask, size_t size)
-{
- const load_command* startCmds = NULL;
- if ( mh->magic == MH_MAGIC_64 )
- startCmds = (load_command*)((char *)mh + sizeof(mach_header_64));
- else if ( mh->magic == MH_MAGIC )
- startCmds = (load_command*)((char *)mh + sizeof(mach_header));
- else
- return; // not a mach-o file, or wrong endianness
-
- const load_command* const cmdsEnd = (load_command*)((char*)startCmds + mh->sizeofcmds);
- const load_command* cmd = startCmds;
- for(uint32_t i = 0; i < mh->ncmds; ++i) {
- const load_command* nextCmd = (load_command*)((char *)cmd + cmd->cmdsize);
- if ( (cmd->cmdsize < 8) || (nextCmd > cmdsEnd) || (nextCmd < startCmds) ) {
- return; // malformed load command
- }
- if ( cmd->cmd == LC_UUID ) {
- const uuid_command* uuidCmd = (uuid_command*)cmd;
- 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;
- _curSegment->size = segCmd->vmsize;
- _curSegment++;
- _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;
- _curSegment->size = segCmd->vmsize;
- _curSegment++;
- _curSegmentIndex++;
- }
- cmd = nextCmd;
- }
-}
-
-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", NULL };
- for (const char** s=stdSegNames; *s != NULL; ++s) {
- if ( strcmp(name, *s) == 0 )
- return *s;
- }
- // copy custom segment names into string pool
- return addString(name, 16);
-}
-
-void dyld_process_info_base::forEachImage(void (^callback)(uint64_t machHeaderAddress, const uuid_t uuid, const char* path)) const
-{
- for (const ImageInfo* p = _firstImage; p < _curImage; ++p) {
- callback(p->loadAddress, p->uuid, p->path);
- }
-}
-
-void dyld_process_info_base::forEachSegment(uint64_t machHeaderAddress, void (^callback)(uint64_t segmentAddress, uint64_t segmentSize, const char* segmentName)) const
-{
- for (const ImageInfo* p = _firstImage; p < _curImage; ++p) {
- if ( p->loadAddress == machHeaderAddress ) {
- uint64_t slide = 0;
- for (uint32_t i=0; i < p->segmentsCount; ++i) {
- const SegmentInfo* seg = &_firstSegment[p->segmentStartIndex+i];
- if ( strcmp(seg->name, "__TEXT") == 0 ) {
- slide = machHeaderAddress - seg->addr;
- break;
- }
- }
- for (uint32_t i=0; i < p->segmentsCount; ++i) {
- const SegmentInfo* seg = &_firstSegment[p->segmentStartIndex+i];
- callback(seg->addr + slide, seg->size, seg->name);
- }
- break;
- }
- }
-}
-
-dyld_process_info _dyld_process_info_create(task_t task, uint64_t timestamp, kern_return_t* kr)
-{
- __block dyld_process_info result = nullptr;
- kern_return_t krSink = KERN_SUCCESS;
- if (kr == nullptr) {
- kr = &krSink;
- }
- *kr = KERN_SUCCESS;
-
- task_dyld_info_data_t task_dyld_info;
- mach_msg_type_number_t count = TASK_DYLD_INFO_COUNT;
- if ( kern_return_t r = task_info(task, TASK_DYLD_INFO, (task_info_t)&task_dyld_info, &count) ) {
- *kr = r;
- return nullptr;
- }
-
- //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)
- 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, (size_t)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;
-}
-
-void _dyld_process_info_get_state(dyld_process_info info, dyld_process_state_info* stateInfo)
-{
- *stateInfo = *info->stateInfo();
-}
-
-void _dyld_process_info_get_cache(dyld_process_info info, dyld_process_cache_info* cacheInfo)
-{
- *cacheInfo = *info->cacheInfo();
-}
-
-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();
-}
-
-void _dyld_process_info_for_each_image(dyld_process_info info, void (^callback)(uint64_t machHeaderAddress, const uuid_t uuid, const char* path))
-{
- info->forEachImage(callback);
-}
-
-
-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))
-{
- info->forEachSegment(machHeaderAddress, callback);
-}
-
-
-