mirror of
https://github.com/chromium/crashpad.git
synced 2024-12-26 06:31:50 +08:00
4f5dd67229
Only RV64GC is supported. Bug: fuchsia:127655 Tested: `python build/run_tests.py` on RISC-V emulator Tested: Created minidump via self-induced crash on RISC-V emulator, ran through Breakpad stackwalker Change-Id: I713797cd623b0a758269048e01696cbce502ca6c Reviewed-on: https://chromium-review.googlesource.com/c/crashpad/crashpad/+/4581050 Reviewed-by: Joshua Peraza <jperaza@chromium.org>
545 lines
16 KiB
C++
545 lines
16 KiB
C++
// Copyright 2017 The Crashpad Authors
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
#include "snapshot/linux/exception_snapshot_linux.h"
|
|
|
|
#include <signal.h>
|
|
|
|
#include "base/logging.h"
|
|
#include "snapshot/linux/capture_memory_delegate_linux.h"
|
|
#include "snapshot/linux/cpu_context_linux.h"
|
|
#include "snapshot/linux/process_reader_linux.h"
|
|
#include "snapshot/linux/signal_context.h"
|
|
#include "util/linux/traits.h"
|
|
#include "util/misc/reinterpret_bytes.h"
|
|
#include "util/numeric/safe_assignment.h"
|
|
#include "util/posix/signals.h"
|
|
|
|
namespace crashpad {
|
|
namespace internal {
|
|
|
|
ExceptionSnapshotLinux::ExceptionSnapshotLinux()
|
|
: ExceptionSnapshot(),
|
|
context_union_(),
|
|
context_(),
|
|
codes_(),
|
|
thread_id_(0),
|
|
exception_address_(0),
|
|
signal_number_(0),
|
|
signal_code_(0),
|
|
initialized_() {}
|
|
|
|
ExceptionSnapshotLinux::~ExceptionSnapshotLinux() {}
|
|
|
|
#if defined(ARCH_CPU_X86_FAMILY)
|
|
|
|
template <>
|
|
bool ExceptionSnapshotLinux::ReadContext<ContextTraits32>(
|
|
ProcessReaderLinux* reader,
|
|
LinuxVMAddress context_address) {
|
|
UContext<ContextTraits32> ucontext;
|
|
if (!reader->Memory()->Read(context_address, sizeof(ucontext), &ucontext)) {
|
|
LOG(ERROR) << "Couldn't read ucontext";
|
|
return false;
|
|
}
|
|
|
|
context_.architecture = kCPUArchitectureX86;
|
|
context_.x86 = &context_union_.x86;
|
|
|
|
if (!ucontext.mcontext.fpptr) {
|
|
InitializeCPUContextX86_NoFloatingPoint(ucontext.mcontext.gprs,
|
|
context_.x86);
|
|
return true;
|
|
}
|
|
|
|
SignalFloatContext32 fprs;
|
|
if (!reader->Memory()->Read(ucontext.mcontext.fpptr, sizeof(fprs), &fprs)) {
|
|
LOG(ERROR) << "Couldn't read float context";
|
|
return false;
|
|
}
|
|
|
|
if (fprs.magic == X86_FXSR_MAGIC) {
|
|
InitializeCPUContextX86_NoFloatingPoint(ucontext.mcontext.gprs,
|
|
context_.x86);
|
|
if (!reader->Memory()->Read(
|
|
ucontext.mcontext.fpptr + offsetof(SignalFloatContext32, fxsave),
|
|
sizeof(CPUContextX86::Fxsave),
|
|
&context_.x86->fxsave)) {
|
|
LOG(ERROR) << "Couldn't read fxsave";
|
|
return false;
|
|
}
|
|
} else if (fprs.magic == 0xffff) {
|
|
InitializeCPUContextX86(ucontext.mcontext.gprs, fprs, context_.x86);
|
|
} else {
|
|
LOG(ERROR) << "unexpected magic 0x" << std::hex << fprs.magic;
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
template <>
|
|
bool ExceptionSnapshotLinux::ReadContext<ContextTraits64>(
|
|
ProcessReaderLinux* reader,
|
|
LinuxVMAddress context_address) {
|
|
UContext<ContextTraits64> ucontext;
|
|
if (!reader->Memory()->Read(context_address, sizeof(ucontext), &ucontext)) {
|
|
LOG(ERROR) << "Couldn't read ucontext";
|
|
return false;
|
|
}
|
|
|
|
context_.architecture = kCPUArchitectureX86_64;
|
|
context_.x86_64 = &context_union_.x86_64;
|
|
|
|
if (!ucontext.mcontext.fpptr) {
|
|
InitializeCPUContextX86_64_NoFloatingPoint(ucontext.mcontext.gprs,
|
|
context_.x86_64);
|
|
return true;
|
|
}
|
|
|
|
SignalFloatContext64 fprs;
|
|
if (!reader->Memory()->Read(ucontext.mcontext.fpptr, sizeof(fprs), &fprs)) {
|
|
LOG(ERROR) << "Couldn't read float context";
|
|
return false;
|
|
}
|
|
|
|
InitializeCPUContextX86_64(ucontext.mcontext.gprs, fprs, context_.x86_64);
|
|
return true;
|
|
}
|
|
|
|
#elif defined(ARCH_CPU_ARM_FAMILY)
|
|
|
|
template <>
|
|
bool ExceptionSnapshotLinux::ReadContext<ContextTraits32>(
|
|
ProcessReaderLinux* reader,
|
|
LinuxVMAddress context_address) {
|
|
context_.architecture = kCPUArchitectureARM;
|
|
context_.arm = &context_union_.arm;
|
|
|
|
CPUContextARM* dest_context = context_.arm;
|
|
const ProcessMemory* memory = reader->Memory();
|
|
|
|
LinuxVMAddress gprs_address =
|
|
context_address + offsetof(UContext<ContextTraits32>, mcontext32) +
|
|
offsetof(ContextTraits32::MContext32, gprs);
|
|
|
|
SignalThreadContext32 thread_context;
|
|
if (!memory->Read(gprs_address, sizeof(thread_context), &thread_context)) {
|
|
LOG(ERROR) << "Couldn't read gprs";
|
|
return false;
|
|
}
|
|
InitializeCPUContextARM_NoFloatingPoint(thread_context, dest_context);
|
|
|
|
LinuxVMAddress reserved_address =
|
|
context_address + offsetof(UContext<ContextTraits32>, reserved);
|
|
if ((reserved_address & 7) != 0) {
|
|
LOG(ERROR) << "invalid alignment 0x" << std::hex << reserved_address;
|
|
return false;
|
|
}
|
|
|
|
constexpr VMSize kMaxContextSpace = 1024;
|
|
|
|
ProcessMemoryRange range;
|
|
if (!range.Initialize(memory, false, reserved_address, kMaxContextSpace)) {
|
|
return false;
|
|
}
|
|
|
|
do {
|
|
CoprocessorContextHead head;
|
|
if (!range.Read(reserved_address, sizeof(head), &head)) {
|
|
LOG(ERROR) << "missing context terminator";
|
|
return false;
|
|
}
|
|
reserved_address += sizeof(head);
|
|
|
|
switch (head.magic) {
|
|
case VFP_MAGIC:
|
|
if (head.size != sizeof(SignalVFPContext) + sizeof(head)) {
|
|
LOG(ERROR) << "unexpected vfp context size " << head.size;
|
|
return false;
|
|
}
|
|
static_assert(
|
|
sizeof(SignalVFPContext::vfp) == sizeof(dest_context->vfp_regs),
|
|
"vfp context size mismatch");
|
|
if (!range.Read(reserved_address + offsetof(SignalVFPContext, vfp),
|
|
sizeof(dest_context->vfp_regs),
|
|
&dest_context->vfp_regs)) {
|
|
LOG(ERROR) << "Couldn't read vfp";
|
|
return false;
|
|
}
|
|
dest_context->have_vfp_regs = true;
|
|
return true;
|
|
|
|
case CRUNCH_MAGIC:
|
|
case IWMMXT_MAGIC:
|
|
case DUMMY_MAGIC:
|
|
reserved_address += head.size - sizeof(head);
|
|
continue;
|
|
|
|
case 0:
|
|
return true;
|
|
|
|
default:
|
|
LOG(ERROR) << "invalid magic number 0x" << std::hex << head.magic;
|
|
return false;
|
|
}
|
|
} while (true);
|
|
}
|
|
|
|
template <>
|
|
bool ExceptionSnapshotLinux::ReadContext<ContextTraits64>(
|
|
ProcessReaderLinux* reader,
|
|
LinuxVMAddress context_address) {
|
|
context_.architecture = kCPUArchitectureARM64;
|
|
context_.arm64 = &context_union_.arm64;
|
|
|
|
CPUContextARM64* dest_context = context_.arm64;
|
|
const ProcessMemory* memory = reader->Memory();
|
|
|
|
LinuxVMAddress gprs_address =
|
|
context_address + offsetof(UContext<ContextTraits64>, mcontext64) +
|
|
offsetof(ContextTraits64::MContext64, gprs);
|
|
|
|
ThreadContext::t64_t thread_context;
|
|
if (!memory->Read(gprs_address, sizeof(thread_context), &thread_context)) {
|
|
LOG(ERROR) << "Couldn't read gprs";
|
|
return false;
|
|
}
|
|
InitializeCPUContextARM64_NoFloatingPoint(thread_context, dest_context);
|
|
|
|
LinuxVMAddress reserved_address =
|
|
context_address + offsetof(UContext<ContextTraits64>, reserved);
|
|
if ((reserved_address & 15) != 0) {
|
|
LOG(ERROR) << "invalid alignment 0x" << std::hex << reserved_address;
|
|
return false;
|
|
}
|
|
|
|
constexpr VMSize kMaxContextSpace = 4096;
|
|
|
|
ProcessMemoryRange range;
|
|
if (!range.Initialize(memory, true, reserved_address, kMaxContextSpace)) {
|
|
return false;
|
|
}
|
|
|
|
do {
|
|
CoprocessorContextHead head;
|
|
if (!range.Read(reserved_address, sizeof(head), &head)) {
|
|
LOG(ERROR) << "missing context terminator";
|
|
return false;
|
|
}
|
|
reserved_address += sizeof(head);
|
|
|
|
switch (head.magic) {
|
|
case FPSIMD_MAGIC:
|
|
if (head.size != sizeof(SignalFPSIMDContext) + sizeof(head)) {
|
|
LOG(ERROR) << "unexpected fpsimd context size " << head.size;
|
|
return false;
|
|
}
|
|
SignalFPSIMDContext fpsimd;
|
|
if (!range.Read(reserved_address, sizeof(fpsimd), &fpsimd)) {
|
|
LOG(ERROR) << "Couldn't read fpsimd " << head.size;
|
|
return false;
|
|
}
|
|
InitializeCPUContextARM64_OnlyFPSIMD(fpsimd, dest_context);
|
|
return true;
|
|
|
|
case ESR_MAGIC:
|
|
case EXTRA_MAGIC:
|
|
reserved_address += head.size - sizeof(head);
|
|
continue;
|
|
|
|
case 0:
|
|
LOG(WARNING) << "fpsimd not found";
|
|
return true;
|
|
|
|
default:
|
|
LOG(ERROR) << "invalid magic number 0x" << std::hex << head.magic;
|
|
return false;
|
|
}
|
|
} while (true);
|
|
}
|
|
|
|
#elif defined(ARCH_CPU_MIPS_FAMILY)
|
|
|
|
template <typename Traits>
|
|
static bool ReadContext(ProcessReaderLinux* reader,
|
|
LinuxVMAddress context_address,
|
|
typename Traits::CPUContext* dest_context) {
|
|
const ProcessMemory* memory = reader->Memory();
|
|
|
|
LinuxVMAddress gregs_address = context_address +
|
|
offsetof(UContext<Traits>, mcontext) +
|
|
offsetof(typename Traits::MContext, gregs);
|
|
|
|
typename Traits::SignalThreadContext thread_context;
|
|
if (!memory->Read(gregs_address, sizeof(thread_context), &thread_context)) {
|
|
LOG(ERROR) << "Couldn't read gregs";
|
|
return false;
|
|
}
|
|
|
|
LinuxVMAddress fpregs_address = context_address +
|
|
offsetof(UContext<Traits>, mcontext) +
|
|
offsetof(typename Traits::MContext, fpregs);
|
|
|
|
typename Traits::SignalFloatContext fp_context;
|
|
if (!memory->Read(fpregs_address, sizeof(fp_context), &fp_context)) {
|
|
LOG(ERROR) << "Couldn't read fpregs";
|
|
return false;
|
|
}
|
|
|
|
InitializeCPUContextMIPS<Traits>(thread_context, fp_context, dest_context);
|
|
|
|
return true;
|
|
}
|
|
|
|
template <>
|
|
bool ExceptionSnapshotLinux::ReadContext<ContextTraits32>(
|
|
ProcessReaderLinux* reader,
|
|
LinuxVMAddress context_address) {
|
|
context_.architecture = kCPUArchitectureMIPSEL;
|
|
context_.mipsel = &context_union_.mipsel;
|
|
|
|
return internal::ReadContext<ContextTraits32>(
|
|
reader, context_address, context_.mipsel);
|
|
}
|
|
|
|
template <>
|
|
bool ExceptionSnapshotLinux::ReadContext<ContextTraits64>(
|
|
ProcessReaderLinux* reader,
|
|
LinuxVMAddress context_address) {
|
|
context_.architecture = kCPUArchitectureMIPS64EL;
|
|
context_.mips64 = &context_union_.mips64;
|
|
|
|
return internal::ReadContext<ContextTraits64>(
|
|
reader, context_address, context_.mips64);
|
|
}
|
|
|
|
#elif defined(ARCH_CPU_RISCV64)
|
|
|
|
static bool ReadContext(ProcessReaderLinux* reader,
|
|
LinuxVMAddress context_address,
|
|
typename ContextTraits64::CPUContext* dest_context) {
|
|
const ProcessMemory* memory = reader->Memory();
|
|
|
|
LinuxVMAddress gregs_address = context_address +
|
|
offsetof(UContext<ContextTraits64>, mcontext) +
|
|
offsetof(MContext64, regs);
|
|
|
|
typename ContextTraits64::SignalThreadContext thread_context;
|
|
if (!memory->Read(gregs_address, sizeof(thread_context), &thread_context)) {
|
|
LOG(ERROR) << "Couldn't read gregs";
|
|
return false;
|
|
}
|
|
|
|
LinuxVMAddress fpregs_address =
|
|
context_address + offsetof(UContext<ContextTraits64>, mcontext) +
|
|
offsetof(MContext64, fpregs);
|
|
|
|
typename ContextTraits64::SignalFloatContext fp_context;
|
|
if (!memory->Read(fpregs_address, sizeof(fp_context), &fp_context)) {
|
|
LOG(ERROR) << "Couldn't read fpregs";
|
|
return false;
|
|
}
|
|
|
|
InitializeCPUContextRISCV64(thread_context, fp_context, dest_context);
|
|
|
|
return true;
|
|
}
|
|
|
|
template <>
|
|
bool ExceptionSnapshotLinux::ReadContext<ContextTraits64>(
|
|
ProcessReaderLinux* reader,
|
|
LinuxVMAddress context_address) {
|
|
context_.architecture = kCPUArchitectureRISCV64;
|
|
context_.riscv64 = &context_union_.riscv64;
|
|
|
|
return internal::ReadContext(reader, context_address, context_.riscv64);
|
|
}
|
|
|
|
#endif // ARCH_CPU_X86_FAMILY
|
|
|
|
bool ExceptionSnapshotLinux::Initialize(
|
|
ProcessReaderLinux* process_reader,
|
|
LinuxVMAddress siginfo_address,
|
|
LinuxVMAddress context_address,
|
|
pid_t thread_id,
|
|
uint32_t* gather_indirectly_referenced_memory_cap) {
|
|
INITIALIZATION_STATE_SET_INITIALIZING(initialized_);
|
|
|
|
thread_id_ = thread_id;
|
|
const ProcessReaderLinux::Thread* thread = nullptr;
|
|
for (const auto& loop_thread : process_reader->Threads()) {
|
|
if (thread_id == loop_thread.tid) {
|
|
thread = &loop_thread;
|
|
break;
|
|
}
|
|
}
|
|
if (!thread) {
|
|
// This is allowed until {ProcessReaderLinux::InitializeThreads()} is
|
|
// improved to support target threads in the same thread group.
|
|
LOG(WARNING) << "thread ID " << thread_id << " not found in process";
|
|
}
|
|
|
|
if (process_reader->Is64Bit()) {
|
|
if (!ReadContext<ContextTraits64>(process_reader, context_address) ||
|
|
!ReadSiginfo<Traits64>(process_reader, siginfo_address)) {
|
|
return false;
|
|
}
|
|
} else {
|
|
#if !defined(ARCH_CPU_RISCV64)
|
|
if (!ReadContext<ContextTraits32>(process_reader, context_address) ||
|
|
!ReadSiginfo<Traits32>(process_reader, siginfo_address)) {
|
|
return false;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
CaptureMemoryDelegateLinux capture_memory_delegate(
|
|
process_reader,
|
|
thread,
|
|
&extra_memory_,
|
|
gather_indirectly_referenced_memory_cap);
|
|
CaptureMemory::PointedToByContext(context_, &capture_memory_delegate);
|
|
|
|
INITIALIZATION_STATE_SET_VALID(initialized_);
|
|
return true;
|
|
}
|
|
|
|
template <typename Traits>
|
|
bool ExceptionSnapshotLinux::ReadSiginfo(ProcessReaderLinux* reader,
|
|
LinuxVMAddress siginfo_address) {
|
|
Siginfo<Traits> siginfo;
|
|
if (!reader->Memory()->Read(siginfo_address, sizeof(siginfo), &siginfo)) {
|
|
LOG(ERROR) << "Couldn't read siginfo";
|
|
return false;
|
|
}
|
|
|
|
signal_number_ = siginfo.signo;
|
|
signal_code_ = siginfo.code;
|
|
|
|
uint64_t extra_code;
|
|
#define PUSH_CODE(value) \
|
|
do { \
|
|
if (!ReinterpretBytes(value, &extra_code)) { \
|
|
LOG(ERROR) << "bad code"; \
|
|
return false; \
|
|
} \
|
|
codes_.push_back(extra_code); \
|
|
} while (false)
|
|
|
|
switch (siginfo.signo) {
|
|
case SIGILL:
|
|
case SIGFPE:
|
|
case SIGSEGV:
|
|
case SIGBUS:
|
|
case SIGTRAP:
|
|
exception_address_ = siginfo.address;
|
|
break;
|
|
|
|
case SIGPOLL: // SIGIO
|
|
PUSH_CODE(siginfo.band);
|
|
PUSH_CODE(siginfo.fd);
|
|
break;
|
|
|
|
case SIGSYS:
|
|
exception_address_ = siginfo.call_address;
|
|
PUSH_CODE(siginfo.syscall);
|
|
PUSH_CODE(siginfo.arch);
|
|
break;
|
|
|
|
case SIGALRM:
|
|
case SIGVTALRM:
|
|
case SIGPROF:
|
|
PUSH_CODE(siginfo.timerid);
|
|
PUSH_CODE(siginfo.overrun);
|
|
PUSH_CODE(siginfo.sigval.sigval);
|
|
break;
|
|
|
|
case SIGABRT:
|
|
case SIGQUIT:
|
|
case SIGXCPU:
|
|
case SIGXFSZ:
|
|
case SIGHUP:
|
|
case SIGINT:
|
|
case SIGPIPE:
|
|
case SIGTERM:
|
|
case SIGUSR1:
|
|
case SIGUSR2:
|
|
#if defined(SIGEMT)
|
|
case SIGEMT:
|
|
#endif // SIGEMT
|
|
#if defined(SIGPWR)
|
|
case SIGPWR:
|
|
#endif // SIGPWR
|
|
#if defined(SIGSTKFLT)
|
|
case SIGSTKFLT:
|
|
#endif // SIGSTKFLT
|
|
PUSH_CODE(siginfo.pid);
|
|
PUSH_CODE(siginfo.uid);
|
|
PUSH_CODE(siginfo.sigval.sigval);
|
|
break;
|
|
|
|
case Signals::kSimulatedSigno:
|
|
break;
|
|
|
|
default:
|
|
LOG(WARNING) << "Unhandled signal " << siginfo.signo;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
const CPUContext* ExceptionSnapshotLinux::Context() const {
|
|
INITIALIZATION_STATE_DCHECK_VALID(initialized_);
|
|
return &context_;
|
|
}
|
|
|
|
uint64_t ExceptionSnapshotLinux::ThreadID() const {
|
|
INITIALIZATION_STATE_DCHECK_VALID(initialized_);
|
|
return thread_id_;
|
|
}
|
|
|
|
uint32_t ExceptionSnapshotLinux::Exception() const {
|
|
INITIALIZATION_STATE_DCHECK_VALID(initialized_);
|
|
return signal_number_;
|
|
}
|
|
|
|
uint32_t ExceptionSnapshotLinux::ExceptionInfo() const {
|
|
INITIALIZATION_STATE_DCHECK_VALID(initialized_);
|
|
return signal_code_;
|
|
}
|
|
|
|
uint64_t ExceptionSnapshotLinux::ExceptionAddress() const {
|
|
INITIALIZATION_STATE_DCHECK_VALID(initialized_);
|
|
return exception_address_;
|
|
}
|
|
|
|
const std::vector<uint64_t>& ExceptionSnapshotLinux::Codes() const {
|
|
INITIALIZATION_STATE_DCHECK_VALID(initialized_);
|
|
return codes_;
|
|
}
|
|
|
|
std::vector<const MemorySnapshot*> ExceptionSnapshotLinux::ExtraMemory() const {
|
|
INITIALIZATION_STATE_DCHECK_VALID(initialized_);
|
|
std::vector<const MemorySnapshot*> result;
|
|
result.reserve(extra_memory_.size());
|
|
for (const auto& em : extra_memory_) {
|
|
result.push_back(em.get());
|
|
}
|
|
return result;
|
|
}
|
|
|
|
} // namespace internal
|
|
} // namespace crashpad
|