diff options
Diffstat (limited to 'toolkit/crashreporter/google-breakpad/src/client/mac/handler/dynamic_images.cc')
| -rw-r--r-- | toolkit/crashreporter/google-breakpad/src/client/mac/handler/dynamic_images.cc | 573 |
1 files changed, 0 insertions, 573 deletions
diff --git a/toolkit/crashreporter/google-breakpad/src/client/mac/handler/dynamic_images.cc b/toolkit/crashreporter/google-breakpad/src/client/mac/handler/dynamic_images.cc deleted file mode 100644 index cdba6df4a..000000000 --- a/toolkit/crashreporter/google-breakpad/src/client/mac/handler/dynamic_images.cc +++ /dev/null @@ -1,573 +0,0 @@ -// Copyright (c) 2007, Google Inc. -// All rights reserved. -// -// Redistribution and use in source and binary forms, with or without -// modification, are permitted provided that the following conditions are -// met: -// -// * Redistributions of source code must retain the above copyright -// notice, this list of conditions and the following disclaimer. -// * Redistributions in binary form must reproduce the above -// copyright notice, this list of conditions and the following disclaimer -// in the documentation and/or other materials provided with the -// distribution. -// * Neither the name of Google Inc. nor the names of its -// contributors may be used to endorse or promote products derived from -// this software without specific prior written permission. -// -// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR -// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT -// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT -// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, -// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY -// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT -// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE -// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - -#include "client/mac/handler/dynamic_images.h" - -extern "C" { // needed to compile on Leopard - #include <mach-o/nlist.h> - #include <stdlib.h> - #include <stdio.h> -} - -#include <assert.h> -#include <AvailabilityMacros.h> -#include <dlfcn.h> -#include <mach/task_info.h> -#include <sys/sysctl.h> -#include <TargetConditionals.h> -#include <unistd.h> - -#include <algorithm> -#include <string> -#include <vector> - -#include "breakpad_nlist_64.h" - -#if !TARGET_OS_IPHONE -#include <CoreServices/CoreServices.h> - -#ifndef MAC_OS_X_VERSION_10_6 -#define MAC_OS_X_VERSION_10_6 1060 -#endif - -#if MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_6 - -// Fallback declarations for TASK_DYLD_INFO and friends, introduced in -// <mach/task_info.h> in the Mac OS X 10.6 SDK. -#define TASK_DYLD_INFO 17 -struct task_dyld_info { - mach_vm_address_t all_image_info_addr; - mach_vm_size_t all_image_info_size; -}; -typedef struct task_dyld_info task_dyld_info_data_t; -typedef struct task_dyld_info *task_dyld_info_t; -#define TASK_DYLD_INFO_COUNT (sizeof(task_dyld_info_data_t) / sizeof(natural_t)) - -#endif - -#endif // !TARGET_OS_IPHONE - -namespace google_breakpad { - -using std::string; -using std::vector; - -//============================================================================== -// Returns the size of the memory region containing |address| and the -// number of bytes from |address| to the end of the region. -// We potentially, will extend the size of the original -// region by the size of the following region if it's contiguous with the -// first in order to handle cases when we're reading strings and they -// straddle two vm regions. -// -static mach_vm_size_t GetMemoryRegionSize(task_port_t target_task, - const uint64_t address, - mach_vm_size_t *size_to_end) { - mach_vm_address_t region_base = (mach_vm_address_t)address; - mach_vm_size_t region_size; - natural_t nesting_level = 0; - vm_region_submap_info_64 submap_info; - mach_msg_type_number_t info_count = VM_REGION_SUBMAP_INFO_COUNT_64; - - // Get information about the vm region containing |address| - vm_region_recurse_info_t region_info; - region_info = reinterpret_cast<vm_region_recurse_info_t>(&submap_info); - - kern_return_t result = - mach_vm_region_recurse(target_task, - ®ion_base, - ®ion_size, - &nesting_level, - region_info, - &info_count); - - if (result == KERN_SUCCESS) { - // Get distance from |address| to the end of this region - *size_to_end = region_base + region_size -(mach_vm_address_t)address; - - // If we want to handle strings as long as 4096 characters we may need - // to check if there's a vm region immediately following the first one. - // If so, we need to extend |*size_to_end| to go all the way to the end - // of the second region. - if (*size_to_end < 4096) { - // Second region starts where the first one ends - mach_vm_address_t region_base2 = - (mach_vm_address_t)(region_base + region_size); - mach_vm_size_t region_size2; - - // Get information about the following vm region - result = - mach_vm_region_recurse(target_task, - ®ion_base2, - ®ion_size2, - &nesting_level, - region_info, - &info_count); - - // Extend region_size to go all the way to the end of the 2nd region - if (result == KERN_SUCCESS - && region_base2 == region_base + region_size) { - region_size += region_size2; - } - } - - *size_to_end = region_base + region_size -(mach_vm_address_t)address; - } else { - region_size = 0; - *size_to_end = 0; - } - - return region_size; -} - -#define kMaxStringLength 8192 -//============================================================================== -// Reads a NULL-terminated string from another task. -// -// Warning! This will not read any strings longer than kMaxStringLength-1 -// -static string ReadTaskString(task_port_t target_task, - const uint64_t address) { - // The problem is we don't know how much to read until we know how long - // the string is. And we don't know how long the string is, until we've read - // the memory! So, we'll try to read kMaxStringLength bytes - // (or as many bytes as we can until we reach the end of the vm region). - mach_vm_size_t size_to_end; - GetMemoryRegionSize(target_task, address, &size_to_end); - - if (size_to_end > 0) { - mach_vm_size_t size_to_read = - size_to_end > kMaxStringLength ? kMaxStringLength : size_to_end; - - vector<uint8_t> bytes; - if (ReadTaskMemory(target_task, address, (size_t)size_to_read, bytes) != - KERN_SUCCESS) - return string(); - - return string(reinterpret_cast<const char*>(&bytes[0])); - } - - return string(); -} - -//============================================================================== -// Reads an address range from another task. The bytes read will be returned -// in bytes, which will be resized as necessary. -kern_return_t ReadTaskMemory(task_port_t target_task, - const uint64_t address, - size_t length, - vector<uint8_t> &bytes) { - int systemPageSize = getpagesize(); - - // use the negative of the page size for the mask to find the page address - mach_vm_address_t page_address = address & (-systemPageSize); - - mach_vm_address_t last_page_address = - (address + length + (systemPageSize - 1)) & (-systemPageSize); - - mach_vm_size_t page_size = last_page_address - page_address; - uint8_t* local_start; - uint32_t local_length; - - kern_return_t r = mach_vm_read(target_task, - page_address, - page_size, - reinterpret_cast<vm_offset_t*>(&local_start), - &local_length); - - if (r != KERN_SUCCESS) - return r; - - bytes.resize(length); - memcpy(&bytes[0], - &local_start[(mach_vm_address_t)address - page_address], - length); - mach_vm_deallocate(mach_task_self(), (uintptr_t)local_start, local_length); - return KERN_SUCCESS; -} - -#pragma mark - - -//============================================================================== -// Traits structs for specializing function templates to handle -// 32-bit/64-bit Mach-O files. -struct MachO32 { - typedef mach_header mach_header_type; - typedef segment_command mach_segment_command_type; - typedef dyld_image_info32 dyld_image_info; - typedef dyld_all_image_infos32 dyld_all_image_infos; - typedef struct nlist nlist_type; - static const uint32_t magic = MH_MAGIC; - static const uint32_t segment_load_command = LC_SEGMENT; -}; - -struct MachO64 { - typedef mach_header_64 mach_header_type; - typedef segment_command_64 mach_segment_command_type; - typedef dyld_image_info64 dyld_image_info; - typedef dyld_all_image_infos64 dyld_all_image_infos; - typedef struct nlist_64 nlist_type; - static const uint32_t magic = MH_MAGIC_64; - static const uint32_t segment_load_command = LC_SEGMENT_64; -}; - -template<typename MachBits> -bool FindTextSection(DynamicImage& image) { - typedef typename MachBits::mach_header_type mach_header_type; - typedef typename MachBits::mach_segment_command_type - mach_segment_command_type; - - const mach_header_type* header = - reinterpret_cast<const mach_header_type*>(&image.header_[0]); - - if(header->magic != MachBits::magic) { - return false; - } - - const struct load_command *cmd = - reinterpret_cast<const struct load_command *>(header + 1); - - bool found_text_section = false; - bool found_dylib_id_command = false; - for (unsigned int i = 0; cmd && (i < header->ncmds); ++i) { - if (!found_text_section) { - if (cmd->cmd == MachBits::segment_load_command) { - const mach_segment_command_type *seg = - reinterpret_cast<const mach_segment_command_type *>(cmd); - - if (!strcmp(seg->segname, "__TEXT")) { - image.vmaddr_ = static_cast<mach_vm_address_t>(seg->vmaddr); - image.vmsize_ = static_cast<mach_vm_size_t>(seg->vmsize); - image.slide_ = 0; - - if (seg->fileoff == 0 && seg->filesize != 0) { - image.slide_ = - (uintptr_t)image.GetLoadAddress() - (uintptr_t)seg->vmaddr; - } - found_text_section = true; - } - } - } - - if (!found_dylib_id_command) { - if (cmd->cmd == LC_ID_DYLIB) { - const struct dylib_command *dc = - reinterpret_cast<const struct dylib_command *>(cmd); - - image.version_ = dc->dylib.current_version; - found_dylib_id_command = true; - } - } - - if (found_dylib_id_command && found_text_section) { - return true; - } - - cmd = reinterpret_cast<const struct load_command *> - (reinterpret_cast<const char *>(cmd) + cmd->cmdsize); - } - - return false; -} - -//============================================================================== -// Initializes vmaddr_, vmsize_, and slide_ -void DynamicImage::CalculateMemoryAndVersionInfo() { - // unless we can process the header, ensure that calls to - // IsValid() will return false - vmaddr_ = 0; - vmsize_ = 0; - slide_ = 0; - version_ = 0; - - // The function template above does all the real work. - if (Is64Bit()) - FindTextSection<MachO64>(*this); - else - FindTextSection<MachO32>(*this); -} - -//============================================================================== -// The helper function template abstracts the 32/64-bit differences. -template<typename MachBits> -uint32_t GetFileTypeFromHeader(DynamicImage& image) { - typedef typename MachBits::mach_header_type mach_header_type; - - const mach_header_type* header = - reinterpret_cast<const mach_header_type*>(&image.header_[0]); - return header->filetype; -} - -uint32_t DynamicImage::GetFileType() { - if (Is64Bit()) - return GetFileTypeFromHeader<MachO64>(*this); - - return GetFileTypeFromHeader<MachO32>(*this); -} - -#pragma mark - - -//============================================================================== -// Loads information about dynamically loaded code in the given task. -DynamicImages::DynamicImages(mach_port_t task) - : task_(task), - cpu_type_(DetermineTaskCPUType(task)), - image_list_() { - ReadImageInfoForTask(); -} - -template<typename MachBits> -static uint64_t LookupSymbol(const char* symbol_name, - const char* filename, - cpu_type_t cpu_type) { - typedef typename MachBits::nlist_type nlist_type; - - nlist_type symbol_info[8] = {}; - const char *symbolNames[2] = { symbol_name, "\0" }; - nlist_type &list = symbol_info[0]; - int invalidEntriesCount = breakpad_nlist(filename, - &list, - symbolNames, - cpu_type); - - if(invalidEntriesCount != 0) { - return 0; - } - - assert(list.n_value); - return list.n_value; -} - -#if TARGET_OS_IPHONE || MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_6 -static bool HasTaskDyldInfo() { - return true; -} -#else -static SInt32 GetOSVersionInternal() { - SInt32 os_version = 0; - Gestalt(gestaltSystemVersion, &os_version); - return os_version; -} - -static SInt32 GetOSVersion() { - static SInt32 os_version = GetOSVersionInternal(); - return os_version; -} - -static bool HasTaskDyldInfo() { - return GetOSVersion() >= 0x1060; -} -#endif // TARGET_OS_IPHONE || MAC_OS_X_VERSION_MIN_REQUIRED >= 10_6 - -uint64_t DynamicImages::GetDyldAllImageInfosPointer() { - if (HasTaskDyldInfo()) { - task_dyld_info_data_t task_dyld_info; - mach_msg_type_number_t count = TASK_DYLD_INFO_COUNT; - if (task_info(task_, TASK_DYLD_INFO, (task_info_t)&task_dyld_info, - &count) != KERN_SUCCESS) { - return 0; - } - - return (uint64_t)task_dyld_info.all_image_info_addr; - } else { - const char *imageSymbolName = "_dyld_all_image_infos"; - const char *dyldPath = "/usr/lib/dyld"; - - if (Is64Bit()) - return LookupSymbol<MachO64>(imageSymbolName, dyldPath, cpu_type_); - return LookupSymbol<MachO32>(imageSymbolName, dyldPath, cpu_type_); - } -} - -//============================================================================== -// This code was written using dyld_debug.c (from Darwin) as a guide. - -template<typename MachBits> -void ReadImageInfo(DynamicImages& images, - uint64_t image_list_address) { - typedef typename MachBits::dyld_image_info dyld_image_info; - typedef typename MachBits::dyld_all_image_infos dyld_all_image_infos; - typedef typename MachBits::mach_header_type mach_header_type; - - // Read the structure inside of dyld that contains information about - // loaded images. We're reading from the desired task's address space. - - // Here we make the assumption that dyld loaded at the same address in - // the crashed process vs. this one. This is an assumption made in - // "dyld_debug.c" and is said to be nearly always valid. - vector<uint8_t> dyld_all_info_bytes; - if (ReadTaskMemory(images.task_, - image_list_address, - sizeof(dyld_all_image_infos), - dyld_all_info_bytes) != KERN_SUCCESS) - return; - - dyld_all_image_infos *dyldInfo = - reinterpret_cast<dyld_all_image_infos*>(&dyld_all_info_bytes[0]); - - // number of loaded images - int count = dyldInfo->infoArrayCount; - - // Read an array of dyld_image_info structures each containing - // information about a loaded image. - vector<uint8_t> dyld_info_array_bytes; - if (ReadTaskMemory(images.task_, - dyldInfo->infoArray, - count * sizeof(dyld_image_info), - dyld_info_array_bytes) != KERN_SUCCESS) - return; - - dyld_image_info *infoArray = - reinterpret_cast<dyld_image_info*>(&dyld_info_array_bytes[0]); - images.image_list_.reserve(count); - - for (int i = 0; i < count; ++i) { - dyld_image_info &info = infoArray[i]; - - // First read just the mach_header from the image in the task. - vector<uint8_t> mach_header_bytes; - if (ReadTaskMemory(images.task_, - info.load_address_, - sizeof(mach_header_type), - mach_header_bytes) != KERN_SUCCESS) - continue; // bail on this dynamic image - - mach_header_type *header = - reinterpret_cast<mach_header_type*>(&mach_header_bytes[0]); - - // Now determine the total amount necessary to read the header - // plus all of the load commands. - size_t header_size = - sizeof(mach_header_type) + header->sizeofcmds; - - if (ReadTaskMemory(images.task_, - info.load_address_, - header_size, - mach_header_bytes) != KERN_SUCCESS) - continue; - - // Read the file name from the task's memory space. - string file_path; - if (info.file_path_) { - // Although we're reading kMaxStringLength bytes, it's copied in the - // the DynamicImage constructor below with the correct string length, - // so it's not really wasting memory. - file_path = ReadTaskString(images.task_, info.file_path_); - } - - // Create an object representing this image and add it to our list. - DynamicImage *new_image; - new_image = new DynamicImage(&mach_header_bytes[0], - header_size, - info.load_address_, - file_path, - static_cast<uintptr_t>(info.file_mod_date_), - images.task_, - images.cpu_type_); - - if (new_image->IsValid()) { - images.image_list_.push_back(DynamicImageRef(new_image)); - } else { - delete new_image; - } - } - - // sorts based on loading address - sort(images.image_list_.begin(), images.image_list_.end()); - // remove duplicates - this happens in certain strange cases - // You can see it in DashboardClient when Google Gadgets plugin - // is installed. Apple's crash reporter log and gdb "info shared" - // both show the same library multiple times at the same address - - vector<DynamicImageRef>::iterator it = unique(images.image_list_.begin(), - images.image_list_.end()); - images.image_list_.erase(it, images.image_list_.end()); -} - -void DynamicImages::ReadImageInfoForTask() { - uint64_t imageList = GetDyldAllImageInfosPointer(); - - if (imageList) { - if (Is64Bit()) - ReadImageInfo<MachO64>(*this, imageList); - else - ReadImageInfo<MachO32>(*this, imageList); - } -} - -//============================================================================== -DynamicImage *DynamicImages::GetExecutableImage() { - int executable_index = GetExecutableImageIndex(); - - if (executable_index >= 0) { - return GetImage(executable_index); - } - - return NULL; -} - -//============================================================================== -// returns -1 if failure to find executable -int DynamicImages::GetExecutableImageIndex() { - int image_count = GetImageCount(); - - for (int i = 0; i < image_count; ++i) { - DynamicImage *image = GetImage(i); - if (image->GetFileType() == MH_EXECUTE) { - return i; - } - } - - return -1; -} - -//============================================================================== -// static -cpu_type_t DynamicImages::DetermineTaskCPUType(task_t task) { - if (task == mach_task_self()) - return GetNativeCPUType(); - - int mib[CTL_MAXNAME]; - size_t mibLen = CTL_MAXNAME; - int err = sysctlnametomib("sysctl.proc_cputype", mib, &mibLen); - if (err == 0) { - assert(mibLen < CTL_MAXNAME); - pid_for_task(task, &mib[mibLen]); - mibLen += 1; - - cpu_type_t cpu_type; - size_t cpuTypeSize = sizeof(cpu_type); - sysctl(mib, static_cast<u_int>(mibLen), &cpu_type, &cpuTypeSize, 0, 0); - return cpu_type; - } - - return GetNativeCPUType(); -} - -} // namespace google_breakpad |