142 lines
4.6 KiB
C++
142 lines
4.6 KiB
C++
// Copyright 2018 The Crashpad Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "snapshot/fuchsia/exception_snapshot_fuchsia.h"
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#include "base/numerics/safe_conversions.h"
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#include "snapshot/fuchsia/cpu_context_fuchsia.h"
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#include "snapshot/fuchsia/process_reader_fuchsia.h"
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namespace crashpad {
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namespace internal {
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ExceptionSnapshotFuchsia::ExceptionSnapshotFuchsia() = default;
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ExceptionSnapshotFuchsia::~ExceptionSnapshotFuchsia() = default;
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bool ExceptionSnapshotFuchsia::Initialize(
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ProcessReaderFuchsia* process_reader,
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zx_koid_t thread_id,
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const zx_exception_report_t& exception_report) {
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INITIALIZATION_STATE_SET_INITIALIZING(initialized_);
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exception_ = exception_report.header.type;
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thread_id_ = thread_id;
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// TODO(scottmg): Not sure whether these values for exception_info_ are
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// helpful or correct. Other values in the structures are stored below into
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// Codes() in case they are useful.
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#if defined(ARCH_CPU_X86_64)
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DCHECK(base::IsValueInRangeForNumericType<uint32_t>(
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exception_report.context.arch.u.x86_64.err_code));
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exception_info_ = exception_report.context.arch.u.x86_64.err_code;
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#elif defined(ARCH_CPU_ARM64)
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exception_info_ = exception_report.context.arch.u.arm_64.esr;
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#endif
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codes_.push_back(exception_);
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codes_.push_back(exception_info_);
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#if defined(ARCH_CPU_X86_64)
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codes_.push_back(exception_report.context.arch.u.x86_64.vector);
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codes_.push_back(exception_report.context.arch.u.x86_64.cr2);
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#elif defined(ARCH_CPU_ARM64)
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codes_.push_back(exception_report.context.arch.u.arm_64.far);
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#endif
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const auto threads = process_reader->Threads();
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const auto& t =
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std::find_if(threads.begin(),
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threads.end(),
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[thread_id](const ProcessReaderFuchsia::Thread& thread) {
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return thread.id == thread_id;
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});
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if (t == threads.end()) {
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// If no threads have been read, then context_ can't be initalized, and the
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// exception snapshot can't be considered initialized_.
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return false;
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}
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#if defined(ARCH_CPU_X86_64)
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context_.architecture = kCPUArchitectureX86_64;
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context_.x86_64 = &context_arch_;
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// TODO(fxbug.dev/5496): Add float context once saved in |t|.
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InitializeCPUContextX86_64_NoFloatingPoint(t->general_registers,
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context_.x86_64);
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#elif defined(ARCH_CPU_ARM64)
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context_.architecture = kCPUArchitectureARM64;
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context_.arm64 = &context_arch_;
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InitializeCPUContextARM64(
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t->general_registers, t->vector_registers, context_.arm64);
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#else
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#error Port.
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#endif
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if (context_.InstructionPointer() != 0 &&
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(exception_ == ZX_EXCP_UNDEFINED_INSTRUCTION ||
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exception_ == ZX_EXCP_SW_BREAKPOINT ||
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exception_ == ZX_EXCP_HW_BREAKPOINT)) {
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exception_address_ = context_.InstructionPointer();
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} else {
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#if defined(ARCH_CPU_X86_64)
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exception_address_ = exception_report.context.arch.u.x86_64.cr2;
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#elif defined(ARCH_CPU_ARM64)
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exception_address_ = exception_report.context.arch.u.arm_64.far;
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#else
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#error Port.
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#endif
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}
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INITIALIZATION_STATE_SET_VALID(initialized_);
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return true;
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}
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const CPUContext* ExceptionSnapshotFuchsia::Context() const {
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INITIALIZATION_STATE_DCHECK_VALID(initialized_);
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return &context_;
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}
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uint64_t ExceptionSnapshotFuchsia::ThreadID() const {
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INITIALIZATION_STATE_DCHECK_VALID(initialized_);
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return thread_id_;
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}
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uint32_t ExceptionSnapshotFuchsia::Exception() const {
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INITIALIZATION_STATE_DCHECK_VALID(initialized_);
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return exception_;
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}
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uint32_t ExceptionSnapshotFuchsia::ExceptionInfo() const {
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INITIALIZATION_STATE_DCHECK_VALID(initialized_);
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return exception_info_;
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}
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uint64_t ExceptionSnapshotFuchsia::ExceptionAddress() const {
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INITIALIZATION_STATE_DCHECK_VALID(initialized_);
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return exception_address_;
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}
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const std::vector<uint64_t>& ExceptionSnapshotFuchsia::Codes() const {
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INITIALIZATION_STATE_DCHECK_VALID(initialized_);
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return codes_;
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}
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std::vector<const MemorySnapshot*> ExceptionSnapshotFuchsia::ExtraMemory()
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const {
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INITIALIZATION_STATE_DCHECK_VALID(initialized_);
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return std::vector<const MemorySnapshot*>();
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}
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} // namespace internal
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} // namespace crashpad
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