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minidump_processor.cc
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// Copyright 2006 Google LLC
//
// 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 LLC 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.
#ifdef HAVE_CONFIG_H
#include <config.h> // Must come first
#endif
#include "google_breakpad/processor/minidump_processor.h"
#include <assert.h>
#include <stdint.h>
#include <stdio.h>
#include <algorithm>
#include <limits>
#include <map>
#include <string>
#include <utility>
#include "common/scoped_ptr.h"
#include "common/stdio_wrapper.h"
#include "common/using_std_string.h"
#include "google_breakpad/processor/call_stack.h"
#include "google_breakpad/processor/minidump.h"
#include "google_breakpad/processor/process_state.h"
#include "google_breakpad/processor/exploitability.h"
#include "google_breakpad/processor/stack_frame_symbolizer.h"
#include "processor/logging.h"
#include "processor/stackwalker_x86.h"
#include "processor/symbolic_constants_win.h"
#ifdef __linux__
#include "processor/disassembler_objdump.h"
#endif
namespace google_breakpad {
MinidumpProcessor::MinidumpProcessor(SymbolSupplier* supplier,
SourceLineResolverInterface* resolver)
: frame_symbolizer_(new StackFrameSymbolizer(supplier, resolver)),
own_frame_symbolizer_(true),
enable_exploitability_(false),
enable_objdump_(false),
enable_objdump_for_exploitability_(false),
max_thread_count_(-1) {
}
MinidumpProcessor::MinidumpProcessor(SymbolSupplier* supplier,
SourceLineResolverInterface* resolver,
bool enable_exploitability)
: frame_symbolizer_(new StackFrameSymbolizer(supplier, resolver)),
own_frame_symbolizer_(true),
enable_exploitability_(enable_exploitability),
enable_objdump_(false),
enable_objdump_for_exploitability_(false),
max_thread_count_(-1) {
}
MinidumpProcessor::MinidumpProcessor(StackFrameSymbolizer* frame_symbolizer,
bool enable_exploitability)
: frame_symbolizer_(frame_symbolizer),
own_frame_symbolizer_(false),
enable_exploitability_(enable_exploitability),
enable_objdump_(false),
enable_objdump_for_exploitability_(false),
max_thread_count_(-1) {
assert(frame_symbolizer_);
}
MinidumpProcessor::~MinidumpProcessor() {
if (own_frame_symbolizer_) delete frame_symbolizer_;
}
ProcessResult MinidumpProcessor::Process(
Minidump* dump, ProcessState* process_state) {
assert(dump);
assert(process_state);
process_state->Clear();
const MDRawHeader* header = dump->header();
if (!header) {
BPLOG(ERROR) << "Minidump " << dump->path() << " has no header";
return PROCESS_ERROR_NO_MINIDUMP_HEADER;
}
process_state->time_date_stamp_ = header->time_date_stamp;
bool has_process_create_time =
GetProcessCreateTime(dump, &process_state->process_create_time_);
bool has_cpu_info = GetCPUInfo(dump, &process_state->system_info_);
bool has_os_info = GetOSInfo(dump, &process_state->system_info_);
uint32_t dump_thread_id = 0;
bool has_dump_thread = false;
uint32_t requesting_thread_id = 0;
bool has_requesting_thread = false;
MinidumpBreakpadInfo* breakpad_info = dump->GetBreakpadInfo();
if (breakpad_info) {
has_dump_thread = breakpad_info->GetDumpThreadID(&dump_thread_id);
has_requesting_thread =
breakpad_info->GetRequestingThreadID(&requesting_thread_id);
}
MinidumpException* exception = dump->GetException();
if (exception) {
process_state->crashed_ = true;
has_requesting_thread = exception->GetThreadID(&requesting_thread_id);
process_state->crash_reason_ = GetCrashReason(
dump, &process_state->crash_address_, enable_objdump_);
process_state->exception_record_.set_code(
exception->exception()->exception_record.exception_code,
// TODO(ivanpe): Populate description.
/* description = */ "");
process_state->exception_record_.set_flags(
exception->exception()->exception_record.exception_flags,
// TODO(ivanpe): Populate description.
/* description = */ "");
process_state->exception_record_.set_nested_exception_record_address(
exception->exception()->exception_record.exception_record);
process_state->exception_record_.set_address(process_state->crash_address_);
const uint32_t num_parameters =
std::min(exception->exception()->exception_record.number_parameters,
MD_EXCEPTION_MAXIMUM_PARAMETERS);
for (uint32_t i = 0; i < num_parameters; ++i) {
process_state->exception_record_.add_parameter(
exception->exception()->exception_record.exception_information[i],
// TODO(ivanpe): Populate description.
/* description = */ "");
}
}
// This will just return an empty string if it doesn't exist.
process_state->assertion_ = GetAssertion(dump);
MinidumpModuleList* module_list = dump->GetModuleList();
// Put a copy of the module list into ProcessState object. This is not
// necessarily a MinidumpModuleList, but it adheres to the CodeModules
// interface, which is all that ProcessState needs to expose.
if (module_list) {
process_state->modules_ = module_list->Copy();
process_state->shrunk_range_modules_ =
process_state->modules_->GetShrunkRangeModules();
for (unsigned int i = 0;
i < process_state->shrunk_range_modules_.size();
i++) {
linked_ptr<const CodeModule> module =
process_state->shrunk_range_modules_[i];
BPLOG(INFO) << "The range for module " << module->code_file()
<< " was shrunk down by " << HexString(
module->shrink_down_delta()) << " bytes. ";
}
}
MinidumpUnloadedModuleList* unloaded_module_list =
dump->GetUnloadedModuleList();
if (unloaded_module_list) {
process_state->unloaded_modules_ = unloaded_module_list->Copy();
}
MinidumpMemoryList* memory_list = dump->GetMemoryList();
if (memory_list) {
BPLOG(INFO) << "Found " << memory_list->region_count()
<< " memory regions.";
}
MinidumpThreadList* threads = dump->GetThreadList();
if (!threads) {
BPLOG(ERROR) << "Minidump " << dump->path() << " has no thread list";
return PROCESS_ERROR_NO_THREAD_LIST;
}
BPLOG(INFO) << "Minidump " << dump->path() << " has " <<
(has_cpu_info ? "" : "no ") << "CPU info, " <<
(has_os_info ? "" : "no ") << "OS info, " <<
(breakpad_info != NULL ? "" : "no ") << "Breakpad info, " <<
(exception != NULL ? "" : "no ") << "exception, " <<
(module_list != NULL ? "" : "no ") << "module list, " <<
(threads != NULL ? "" : "no ") << "thread list, " <<
(has_dump_thread ? "" : "no ") << "dump thread, " <<
(has_requesting_thread ? "" : "no ") << "requesting thread, and " <<
(has_process_create_time ? "" : "no ") << "process create time";
bool interrupted = false;
bool found_requesting_thread = false;
unsigned int thread_count = threads->thread_count();
process_state->original_thread_count_ = thread_count;
// Reset frame_symbolizer_ at the beginning of stackwalk for each minidump.
frame_symbolizer_->Reset();
MinidumpThreadNameList* thread_names = dump->GetThreadNameList();
std::map<uint32_t, string> thread_id_to_name;
if (thread_names) {
const unsigned int thread_name_count = thread_names->thread_name_count();
for (unsigned int thread_name_index = 0;
thread_name_index < thread_name_count; ++thread_name_index) {
MinidumpThreadName* thread_name =
thread_names->GetThreadNameAtIndex(thread_name_index);
if (!thread_name) {
BPLOG(ERROR) << "Could not get thread name for thread at index "
<< thread_name_index;
return PROCESS_ERROR_GETTING_THREAD_NAME;
}
uint32_t thread_id;
if (!thread_name->GetThreadID(&thread_id)) {
BPLOG(ERROR) << "Could not get thread ID for thread at index "
<< thread_name_index;
return PROCESS_ERROR_GETTING_THREAD_NAME;
}
thread_id_to_name.insert(
std::make_pair(thread_id, thread_name->GetThreadName()));
}
}
for (unsigned int thread_index = 0;
thread_index < thread_count;
++thread_index) {
char thread_string_buffer[64];
snprintf(thread_string_buffer, sizeof(thread_string_buffer), "%d/%d",
thread_index, thread_count);
string thread_string = dump->path() + ":" + thread_string_buffer;
MinidumpThread* thread = threads->GetThreadAtIndex(thread_index);
if (!thread) {
BPLOG(ERROR) << "Could not get thread for " << thread_string;
return PROCESS_ERROR_GETTING_THREAD;
}
uint32_t thread_id;
if (!thread->GetThreadID(&thread_id)) {
BPLOG(ERROR) << "Could not get thread ID for " << thread_string;
return PROCESS_ERROR_GETTING_THREAD_ID;
}
thread_string += " id " + HexString(thread_id);
auto thread_name_iter = thread_id_to_name.find(thread_id);
string thread_name;
if (thread_name_iter != thread_id_to_name.end()) {
thread_name = thread_name_iter->second;
}
if (!thread_name.empty()) {
thread_string += " name [" + thread_name + "]";
}
BPLOG(INFO) << "Looking at thread " << thread_string;
// If this thread is the thread that produced the minidump, don't process
// it. Because of the problems associated with a thread producing a
// dump of itself (when both its context and its stack are in flux),
// processing that stack wouldn't provide much useful data.
if (has_dump_thread && thread_id == dump_thread_id) {
process_state->original_thread_count_--;
continue;
}
MinidumpContext* context = thread->GetContext();
if (has_requesting_thread && thread_id == requesting_thread_id) {
if (found_requesting_thread) {
// There can't be more than one requesting thread.
BPLOG(ERROR) << "Duplicate requesting thread: " << thread_string;
return PROCESS_ERROR_DUPLICATE_REQUESTING_THREADS;
}
// Use processed_state->threads_.size() instead of thread_index.
// thread_index points to the thread index in the minidump, which
// might be greater than the thread index in the threads vector if
// any of the minidump's threads are skipped and not placed into the
// processed threads vector. The thread vector's current size will
// be the index of the current thread when it's pushed into the
// vector.
process_state->requesting_thread_ = process_state->threads_.size();
if (max_thread_count_ >= 0) {
thread_count =
std::min(thread_count,
std::max(static_cast<unsigned int>(
process_state->requesting_thread_ + 1),
static_cast<unsigned int>(max_thread_count_)));
}
found_requesting_thread = true;
if (process_state->crashed_) {
// Use the exception record's context for the crashed thread, instead
// of the thread's own context. For the crashed thread, the thread's
// own context is the state inside the exception handler. Using it
// would not result in the expected stack trace from the time of the
// crash. If the exception context is invalid, however, we fall back
// on the thread context.
MinidumpContext* ctx = exception->GetContext();
context = ctx ? ctx : thread->GetContext();
}
}
// If the memory region for the stack cannot be read using the RVA stored
// in the memory descriptor inside MINIDUMP_THREAD, try to locate and use
// a memory region (containing the stack) from the minidump memory list.
MinidumpMemoryRegion* thread_memory = thread->GetMemory();
if (!thread_memory && memory_list) {
uint64_t start_stack_memory_range = thread->GetStartOfStackMemoryRange();
if (start_stack_memory_range) {
thread_memory = memory_list->GetMemoryRegionForAddress(
start_stack_memory_range);
}
}
if (!thread_memory) {
BPLOG(ERROR) << "No memory region for " << thread_string;
}
// Use process_state->modules_ instead of module_list, because the
// |modules| argument will be used to populate the |module| fields in
// the returned StackFrame objects, which will be placed into the
// returned ProcessState object. module_list's lifetime is only as
// long as the Minidump object: it will be deleted when this function
// returns. process_state->modules_ is owned by the ProcessState object
// (just like the StackFrame objects), and is much more suitable for this
// task.
scoped_ptr<Stackwalker> stackwalker(
Stackwalker::StackwalkerForCPU(process_state->system_info(),
context,
thread_memory,
process_state->modules_,
process_state->unloaded_modules_,
frame_symbolizer_));
scoped_ptr<CallStack> stack(new CallStack());
if (stackwalker.get()) {
if (!stackwalker->Walk(stack.get(),
&process_state->modules_without_symbols_,
&process_state->modules_with_corrupt_symbols_)) {
BPLOG(INFO) << "Stackwalker interrupt (missing symbols?) at "
<< thread_string;
interrupted = true;
}
} else {
// Threads with missing CPU contexts will hit this, but
// don't abort processing the rest of the dump just for
// one bad thread.
BPLOG(ERROR) << "No stackwalker for " << thread_string;
}
stack->set_tid(thread_id);
process_state->threads_.push_back(stack.release());
process_state->thread_memory_regions_.push_back(thread_memory);
process_state->thread_names_.push_back(std::move(thread_name));
}
if (interrupted) {
BPLOG(INFO) << "Processing interrupted for " << dump->path();
return PROCESS_SYMBOL_SUPPLIER_INTERRUPTED;
}
// If a requesting thread was indicated, it must be present.
if (has_requesting_thread && !found_requesting_thread) {
// Don't mark as an error, but invalidate the requesting thread
BPLOG(ERROR) << "Minidump indicated requesting thread " <<
HexString(requesting_thread_id) << ", not found in " <<
dump->path();
process_state->requesting_thread_ = -1;
}
// Exploitability defaults to EXPLOITABILITY_NOT_ANALYZED
process_state->exploitability_ = EXPLOITABILITY_NOT_ANALYZED;
// If an exploitability run was requested we perform the platform specific
// rating.
if (enable_exploitability_) {
scoped_ptr<Exploitability> exploitability(
Exploitability::ExploitabilityForPlatform(
dump, process_state, enable_objdump_for_exploitability_));
// The engine will be null if the platform is not supported
if (exploitability != NULL) {
process_state->exploitability_ = exploitability->CheckExploitability();
} else {
process_state->exploitability_ = EXPLOITABILITY_ERR_NOENGINE;
}
}
BPLOG(INFO) << "Processed " << dump->path();
return PROCESS_OK;
}
ProcessResult MinidumpProcessor::Process(
const string& minidump_file, ProcessState* process_state) {
BPLOG(INFO) << "Processing minidump in file " << minidump_file;
Minidump dump(minidump_file);
if (!dump.Read()) {
BPLOG(ERROR) << "Minidump " << dump.path() << " could not be read";
return PROCESS_ERROR_MINIDUMP_NOT_FOUND;
}
return Process(&dump, process_state);
}
// Returns the MDRawSystemInfo from a minidump, or NULL if system info is
// not available from the minidump. If system_info is non-NULL, it is used
// to pass back the MinidumpSystemInfo object.
static const MDRawSystemInfo* GetSystemInfo(Minidump* dump,
MinidumpSystemInfo** system_info) {
MinidumpSystemInfo* minidump_system_info = dump->GetSystemInfo();
if (!minidump_system_info)
return NULL;
if (system_info)
*system_info = minidump_system_info;
return minidump_system_info->system_info();
}
static uint64_t GetAddressForArchitecture(const MDCPUArchitecture architecture,
size_t raw_address)
{
switch (architecture) {
case MD_CPU_ARCHITECTURE_X86:
case MD_CPU_ARCHITECTURE_MIPS:
case MD_CPU_ARCHITECTURE_PPC:
case MD_CPU_ARCHITECTURE_SHX:
case MD_CPU_ARCHITECTURE_ARM:
case MD_CPU_ARCHITECTURE_X86_WIN64:
// 32-bit architectures, mask the upper bits.
return raw_address & 0xffffffffULL;
default:
// All other architectures either have 64-bit pointers or it's impossible
// to tell from the minidump (e.g. MSIL or SPARC) so use 64-bits anyway.
return raw_address;
}
}
// Extract CPU info string from ARM-specific MDRawSystemInfo structure.
// raw_info: pointer to source MDRawSystemInfo.
// cpu_info: address of target string, cpu info text will be appended to it.
static void GetARMCpuInfo(const MDRawSystemInfo* raw_info,
string* cpu_info) {
assert(raw_info != NULL && cpu_info != NULL);
// Write ARM architecture version.
char cpu_string[32];
snprintf(cpu_string, sizeof(cpu_string), "ARMv%d",
raw_info->processor_level);
cpu_info->append(cpu_string);
// There is no good list of implementer id values, but the following
// pages provide some help:
// http://comments.gmane.org/gmane.linux.linaro.devel/6903
// http://forum.xda-developers.com/archive/index.php/t-480226.html
const struct {
uint32_t id;
const char* name;
} vendors[] = {
{ 0x41, "ARM" },
{ 0x51, "Qualcomm" },
{ 0x56, "Marvell" },
{ 0x69, "Intel/Marvell" },
};
const struct {
uint32_t id;
const char* name;
} parts[] = {
{ 0x4100c050, "Cortex-A5" },
{ 0x4100c080, "Cortex-A8" },
{ 0x4100c090, "Cortex-A9" },
{ 0x4100c0f0, "Cortex-A15" },
{ 0x4100c140, "Cortex-R4" },
{ 0x4100c150, "Cortex-R5" },
{ 0x4100b360, "ARM1136" },
{ 0x4100b560, "ARM1156" },
{ 0x4100b760, "ARM1176" },
{ 0x4100b020, "ARM11-MPCore" },
{ 0x41009260, "ARM926" },
{ 0x41009460, "ARM946" },
{ 0x41009660, "ARM966" },
{ 0x510006f0, "Krait" },
{ 0x510000f0, "Scorpion" },
};
const struct {
uint32_t hwcap;
const char* name;
} features[] = {
{ MD_CPU_ARM_ELF_HWCAP_SWP, "swp" },
{ MD_CPU_ARM_ELF_HWCAP_HALF, "half" },
{ MD_CPU_ARM_ELF_HWCAP_THUMB, "thumb" },
{ MD_CPU_ARM_ELF_HWCAP_26BIT, "26bit" },
{ MD_CPU_ARM_ELF_HWCAP_FAST_MULT, "fastmult" },
{ MD_CPU_ARM_ELF_HWCAP_FPA, "fpa" },
{ MD_CPU_ARM_ELF_HWCAP_VFP, "vfpv2" },
{ MD_CPU_ARM_ELF_HWCAP_EDSP, "edsp" },
{ MD_CPU_ARM_ELF_HWCAP_JAVA, "java" },
{ MD_CPU_ARM_ELF_HWCAP_IWMMXT, "iwmmxt" },
{ MD_CPU_ARM_ELF_HWCAP_CRUNCH, "crunch" },
{ MD_CPU_ARM_ELF_HWCAP_THUMBEE, "thumbee" },
{ MD_CPU_ARM_ELF_HWCAP_NEON, "neon" },
{ MD_CPU_ARM_ELF_HWCAP_VFPv3, "vfpv3" },
{ MD_CPU_ARM_ELF_HWCAP_VFPv3D16, "vfpv3d16" },
{ MD_CPU_ARM_ELF_HWCAP_TLS, "tls" },
{ MD_CPU_ARM_ELF_HWCAP_VFPv4, "vfpv4" },
{ MD_CPU_ARM_ELF_HWCAP_IDIVA, "idiva" },
{ MD_CPU_ARM_ELF_HWCAP_IDIVT, "idivt" },
};
uint32_t cpuid = raw_info->cpu.arm_cpu_info.cpuid;
if (cpuid != 0) {
// Extract vendor name from CPUID
const char* vendor = NULL;
uint32_t vendor_id = (cpuid >> 24) & 0xff;
for (size_t i = 0; i < sizeof(vendors)/sizeof(vendors[0]); ++i) {
if (vendors[i].id == vendor_id) {
vendor = vendors[i].name;
break;
}
}
cpu_info->append(" ");
if (vendor) {
cpu_info->append(vendor);
} else {
snprintf(cpu_string, sizeof(cpu_string), "vendor(0x%x)", vendor_id);
cpu_info->append(cpu_string);
}
// Extract part name from CPUID
uint32_t part_id = (cpuid & 0xff00fff0);
const char* part = NULL;
for (size_t i = 0; i < sizeof(parts)/sizeof(parts[0]); ++i) {
if (parts[i].id == part_id) {
part = parts[i].name;
break;
}
}
cpu_info->append(" ");
if (part != NULL) {
cpu_info->append(part);
} else {
snprintf(cpu_string, sizeof(cpu_string), "part(0x%x)", part_id);
cpu_info->append(cpu_string);
}
}
uint32_t elf_hwcaps = raw_info->cpu.arm_cpu_info.elf_hwcaps;
if (elf_hwcaps != 0) {
cpu_info->append(" features: ");
const char* comma = "";
for (size_t i = 0; i < sizeof(features)/sizeof(features[0]); ++i) {
if (elf_hwcaps & features[i].hwcap) {
cpu_info->append(comma);
cpu_info->append(features[i].name);
comma = ",";
}
}
}
}
// static
bool MinidumpProcessor::GetCPUInfo(Minidump* dump, SystemInfo* info) {
assert(dump);
assert(info);
info->cpu.clear();
info->cpu_info.clear();
MinidumpSystemInfo* system_info;
const MDRawSystemInfo* raw_system_info = GetSystemInfo(dump, &system_info);
if (!raw_system_info)
return false;
switch (raw_system_info->processor_architecture) {
case MD_CPU_ARCHITECTURE_X86:
case MD_CPU_ARCHITECTURE_AMD64: {
if (raw_system_info->processor_architecture ==
MD_CPU_ARCHITECTURE_X86)
info->cpu = "x86";
else
info->cpu = "amd64";
const string* cpu_vendor = system_info->GetCPUVendor();
if (cpu_vendor) {
info->cpu_info = *cpu_vendor;
info->cpu_info.append(" ");
}
char x86_info[36];
snprintf(x86_info, sizeof(x86_info), "family %u model %u stepping %u",
raw_system_info->processor_level,
raw_system_info->processor_revision >> 8,
raw_system_info->processor_revision & 0xff);
info->cpu_info.append(x86_info);
break;
}
case MD_CPU_ARCHITECTURE_PPC: {
info->cpu = "ppc";
break;
}
case MD_CPU_ARCHITECTURE_PPC64: {
info->cpu = "ppc64";
break;
}
case MD_CPU_ARCHITECTURE_SPARC: {
info->cpu = "sparc";
break;
}
case MD_CPU_ARCHITECTURE_ARM: {
info->cpu = "arm";
GetARMCpuInfo(raw_system_info, &info->cpu_info);
break;
}
case MD_CPU_ARCHITECTURE_ARM64:
case MD_CPU_ARCHITECTURE_ARM64_OLD: {
info->cpu = "arm64";
break;
}
case MD_CPU_ARCHITECTURE_MIPS: {
info->cpu = "mips";
break;
}
case MD_CPU_ARCHITECTURE_MIPS64: {
info->cpu = "mips64";
break;
}
case MD_CPU_ARCHITECTURE_RISCV: {
info->cpu = "riscv";
break;
}
case MD_CPU_ARCHITECTURE_RISCV64: {
info->cpu = "riscv64";
break;
}
default: {
// Assign the numeric architecture ID into the CPU string.
char cpu_string[7];
snprintf(cpu_string, sizeof(cpu_string), "0x%04x",
raw_system_info->processor_architecture);
info->cpu = cpu_string;
break;
}
}
info->cpu_count = raw_system_info->number_of_processors;
return true;
}
// static
bool MinidumpProcessor::GetOSInfo(Minidump* dump, SystemInfo* info) {
assert(dump);
assert(info);
info->os.clear();
info->os_short.clear();
info->os_version.clear();
MinidumpSystemInfo* system_info;
const MDRawSystemInfo* raw_system_info = GetSystemInfo(dump, &system_info);
if (!raw_system_info)
return false;
info->os_short = system_info->GetOS();
switch (raw_system_info->platform_id) {
case MD_OS_WIN32_NT: {
info->os = "Windows NT";
break;
}
case MD_OS_WIN32_WINDOWS: {
info->os = "Windows";
break;
}
case MD_OS_MAC_OS_X: {
info->os = "Mac OS X";
break;
}
case MD_OS_IOS: {
info->os = "iOS";
break;
}
case MD_OS_LINUX: {
info->os = "Linux";
break;
}
case MD_OS_SOLARIS: {
info->os = "Solaris";
break;
}
case MD_OS_ANDROID: {
info->os = "Android";
break;
}
case MD_OS_PS3: {
info->os = "PS3";
break;
}
case MD_OS_NACL: {
info->os = "NaCl";
break;
}
case MD_OS_FUCHSIA: {
info->os = "Fuchsia";
break;
}
default: {
// Assign the numeric platform ID into the OS string.
char os_string[11];
snprintf(os_string, sizeof(os_string), "0x%08x",
raw_system_info->platform_id);
info->os = os_string;
break;
}
}
char os_version_string[33];
snprintf(os_version_string, sizeof(os_version_string), "%u.%u.%u",
raw_system_info->major_version,
raw_system_info->minor_version,
raw_system_info->build_number);
info->os_version = os_version_string;
const string* csd_version = system_info->GetCSDVersion();
if (csd_version) {
info->os_version.append(" ");
info->os_version.append(*csd_version);
}
return true;
}
// static
bool MinidumpProcessor::GetProcessCreateTime(Minidump* dump,
uint32_t* process_create_time) {
assert(dump);
assert(process_create_time);
*process_create_time = 0;
MinidumpMiscInfo* minidump_misc_info = dump->GetMiscInfo();
if (!minidump_misc_info) {
return false;
}
const MDRawMiscInfo* md_raw_misc_info = minidump_misc_info->misc_info();
if (!md_raw_misc_info) {
return false;
}
if (!(md_raw_misc_info->flags1 & MD_MISCINFO_FLAGS1_PROCESS_TIMES)) {
return false;
}
*process_create_time = md_raw_misc_info->process_create_time;
return true;
}
#ifdef __linux__
static bool IsCanonicalAddress(uint64_t address) {
uint64_t sign_bit = (address >> 63) & 1;
for (int shift = 48; shift < 63; ++shift) {
if (sign_bit != ((address >> shift) & 1)) {
return false;
}
}
return true;
}
static void CalculateFaultAddressFromInstruction(Minidump* dump,
uint64_t* address) {
MinidumpException* exception = dump->GetException();
if (exception == NULL) {
BPLOG(INFO) << "Failed to get exception.";
return;
}
MinidumpContext* context = exception->GetContext();
if (context == NULL) {
BPLOG(INFO) << "Failed to get exception context.";
return;
}
uint64_t instruction_ptr = 0;
if (!context->GetInstructionPointer(&instruction_ptr)) {
BPLOG(INFO) << "Failed to get instruction pointer.";
return;
}
// Get memory region containing instruction pointer.
MinidumpMemoryList* memory_list = dump->GetMemoryList();
MinidumpMemoryRegion* memory_region =
memory_list ?
memory_list->GetMemoryRegionForAddress(instruction_ptr) : NULL;
if (!memory_region) {
BPLOG(INFO) << "No memory region around instruction pointer.";
return;
}
DisassemblerObjdump disassembler(context->GetContextCPU(), memory_region,
instruction_ptr);
if (!disassembler.IsValid()) {
BPLOG(INFO) << "Disassembling fault instruction failed.";
return;
}
// It's possible that we reach here when the faulting address is already
// correct, so we only update it if we find that at least one of the src/dest
// addresses is non-canonical. If both are non-canonical, we arbitrarily set
// it to the larger of the two, as this is more likely to be a known poison
// value.
bool valid_read, valid_write;
uint64_t read_address, write_address;
valid_read = disassembler.CalculateSrcAddress(*context, read_address);
valid_read &= !IsCanonicalAddress(read_address);
valid_write = disassembler.CalculateDestAddress(*context, write_address);
valid_write &= !IsCanonicalAddress(write_address);
if (valid_read && valid_write) {
*address = read_address > write_address ? read_address : write_address;
} else if (valid_read) {
*address = read_address;
} else if (valid_write) {
*address = write_address;
}
}
#endif // __linux__
// static
string MinidumpProcessor::GetCrashReason(Minidump* dump, uint64_t* address,
bool enable_objdump) {
MinidumpException* exception = dump->GetException();
if (!exception)
return "";
const MDRawExceptionStream* raw_exception = exception->exception();
if (!raw_exception)
return "";
if (address)
*address = raw_exception->exception_record.exception_address;
// The reason value is OS-specific and possibly CPU-specific. Set up
// sensible numeric defaults for the reason string in case we can't
// map the codes to a string (because there's no system info, or because
// it's an unrecognized platform, or because it's an unrecognized code.)
char reason_string[24];
char flags_string[11];
uint32_t exception_code = raw_exception->exception_record.exception_code;
uint32_t exception_flags = raw_exception->exception_record.exception_flags;
snprintf(flags_string, sizeof(flags_string), "0x%08x", exception_flags);
snprintf(reason_string, sizeof(reason_string), "0x%08x / %s", exception_code,
flags_string);
string reason = reason_string;
const MDRawSystemInfo* raw_system_info = GetSystemInfo(dump, NULL);
if (!raw_system_info)
return reason;
switch (raw_system_info->platform_id) {
case MD_OS_FUCHSIA: {
switch (exception_code) {
case MD_EXCEPTION_CODE_FUCHSIA_GENERAL:
reason = "GENERAL / ";
reason.append(flags_string);
break;
case MD_EXCEPTION_CODE_FUCHSIA_FATAL_PAGE_FAULT:
reason = "FATAL_PAGE_FAULT / ";
reason.append(flags_string);
break;
case MD_EXCEPTION_CODE_FUCHSIA_UNDEFINED_INSTRUCTION:
reason = "UNDEFINED_INSTRUCTION / ";
reason.append(flags_string);
break;
case MD_EXCEPTION_CODE_FUCHSIA_SW_BREAKPOINT:
reason = "SW_BREAKPOINT / ";
reason.append(flags_string);
break;
case MD_EXCEPTION_CODE_FUCHSIA_HW_BREAKPOINT:
reason = "HW_BREAKPOINT / ";
reason.append(flags_string);
break;
case MD_EXCEPTION_CODE_FUCHSIA_UNALIGNED_ACCESS:
reason = "UNALIGNED_ACCESS / ";
reason.append(flags_string);
break;
case MD_EXCEPTION_CODE_FUCHSIA_THREAD_STARTING:
reason = "THREAD_STARTING / ";
reason.append(flags_string);
break;
case MD_EXCEPTION_CODE_FUCHSIA_THREAD_EXITING:
reason = "THREAD_EXITING / ";
reason.append(flags_string);
break;
case MD_EXCEPTION_CODE_FUCHSIA_POLICY_ERROR:
reason = "POLICY_ERROR / ";
reason.append(flags_string);
break;
case MD_EXCEPTION_CODE_FUCHSIA_PROCESS_STARTING:
reason = "PROCESS_STARTING / ";
reason.append(flags_string);
break;
default:
BPLOG(INFO) << "Unknown exception reason " << reason;
}
break;
}
case MD_OS_MAC_OS_X:
case MD_OS_IOS: {
switch (exception_code) {
case MD_EXCEPTION_MAC_BAD_ACCESS:
reason = "EXC_BAD_ACCESS / ";
switch (exception_flags) {
case MD_EXCEPTION_CODE_MAC_INVALID_ADDRESS:
reason.append("KERN_INVALID_ADDRESS");
break;
case MD_EXCEPTION_CODE_MAC_PROTECTION_FAILURE:
reason.append("KERN_PROTECTION_FAILURE");
break;
case MD_EXCEPTION_CODE_MAC_NO_ACCESS:
reason.append("KERN_NO_ACCESS");
break;
case MD_EXCEPTION_CODE_MAC_MEMORY_FAILURE:
reason.append("KERN_MEMORY_FAILURE");
break;
case MD_EXCEPTION_CODE_MAC_MEMORY_ERROR:
reason.append("KERN_MEMORY_ERROR");
break;
case MD_EXCEPTION_CODE_MAC_CODESIGN_ERROR:
reason.append("KERN_CODESIGN_ERROR");
break;
default:
// arm and ppc overlap
if (raw_system_info->processor_architecture ==
MD_CPU_ARCHITECTURE_ARM ||
raw_system_info->processor_architecture ==
MD_CPU_ARCHITECTURE_ARM64_OLD) {
switch (exception_flags) {
case MD_EXCEPTION_CODE_MAC_ARM_DA_ALIGN:
reason.append("EXC_ARM_DA_ALIGN");
break;
case MD_EXCEPTION_CODE_MAC_ARM_DA_DEBUG:
reason.append("EXC_ARM_DA_DEBUG");
break;
default:
reason.append(flags_string);
BPLOG(INFO) << "Unknown exception reason " << reason;
break;
}
} else if (raw_system_info->processor_architecture ==
MD_CPU_ARCHITECTURE_PPC) {
switch (exception_flags) {
case MD_EXCEPTION_CODE_MAC_PPC_VM_PROT_READ:
reason.append("EXC_PPC_VM_PROT_READ");
break;
case MD_EXCEPTION_CODE_MAC_PPC_BADSPACE: