324 lines
10 KiB
C++
324 lines
10 KiB
C++
// Copyright 2017 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/linux/process_snapshot_linux.h"
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#include <utility>
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#include "base/logging.h"
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#include "build/build_config.h"
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#include "util/linux/exception_information.h"
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namespace crashpad {
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ProcessSnapshotLinux::ProcessSnapshotLinux() = default;
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ProcessSnapshotLinux::~ProcessSnapshotLinux() = default;
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bool ProcessSnapshotLinux::Initialize(PtraceConnection* connection) {
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INITIALIZATION_STATE_SET_INITIALIZING(initialized_);
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if (gettimeofday(&snapshot_time_, nullptr) != 0) {
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PLOG(ERROR) << "gettimeofday";
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return false;
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}
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if (!process_reader_.Initialize(connection) ||
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!memory_range_.Initialize(process_reader_.Memory(),
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process_reader_.Is64Bit())) {
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return false;
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}
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client_id_.InitializeToZero();
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system_.Initialize(&process_reader_, &snapshot_time_);
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InitializeModules();
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GetCrashpadOptionsInternal((&options_));
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InitializeThreads();
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InitializeAnnotations();
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INITIALIZATION_STATE_SET_VALID(initialized_);
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return true;
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}
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pid_t ProcessSnapshotLinux::FindThreadWithStackAddress(
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VMAddress stack_address) {
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INITIALIZATION_STATE_DCHECK_VALID(initialized_);
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for (const auto& thread : process_reader_.Threads()) {
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if (stack_address >= thread.stack_region_address &&
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stack_address <
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thread.stack_region_address + thread.stack_region_size) {
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return thread.tid;
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}
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}
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return -1;
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}
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bool ProcessSnapshotLinux::InitializeException(
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LinuxVMAddress exception_info_address,
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pid_t exception_thread_id) {
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INITIALIZATION_STATE_DCHECK_VALID(initialized_);
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DCHECK(!exception_);
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ExceptionInformation info;
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if (!process_reader_.Memory()->Read(
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exception_info_address, sizeof(info), &info)) {
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LOG(ERROR) << "Couldn't read exception info";
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return false;
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}
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if (exception_thread_id >= 0) {
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info.thread_id = exception_thread_id;
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}
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uint32_t* budget_remaining_pointer =
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options_.gather_indirectly_referenced_memory == TriState::kEnabled
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? &options_.indirectly_referenced_memory_cap
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: nullptr;
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exception_.reset(new internal::ExceptionSnapshotLinux());
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if (!exception_->Initialize(&process_reader_,
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info.siginfo_address,
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info.context_address,
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info.thread_id,
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budget_remaining_pointer)) {
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exception_.reset();
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return false;
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}
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// The thread's existing snapshot will have captured the stack for the signal
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// handler. Replace it with a thread snapshot which captures the stack for the
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// exception context.
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for (const auto& reader_thread : process_reader_.Threads()) {
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if (reader_thread.tid == info.thread_id) {
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ProcessReaderLinux::Thread thread = reader_thread;
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thread.InitializeStackFromSP(&process_reader_,
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exception_->Context()->StackPointer());
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auto exc_thread_snapshot =
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std::make_unique<internal::ThreadSnapshotLinux>();
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if (!exc_thread_snapshot->Initialize(&process_reader_, thread, nullptr)) {
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return false;
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}
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#ifdef CLIENT_STACKTRACES_ENABLED
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exc_thread_snapshot->TrimStackTrace(
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exception_->Context()->InstructionPointer());
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#endif
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for (auto& thread_snapshot : threads_) {
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if (thread_snapshot->ThreadID() ==
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static_cast<uint64_t>(info.thread_id)) {
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thread_snapshot.reset(exc_thread_snapshot.release());
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return true;
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}
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}
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LOG(ERROR) << "thread not found " << info.thread_id;
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return false;
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}
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}
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LOG(ERROR) << "thread not found " << info.thread_id;
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return false;
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}
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void ProcessSnapshotLinux::GetCrashpadOptions(
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CrashpadInfoClientOptions* options) {
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INITIALIZATION_STATE_DCHECK_VALID(initialized_);
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*options = options_;
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}
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void ProcessSnapshotLinux::GetCrashpadOptionsInternal(
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CrashpadInfoClientOptions* options) {
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CrashpadInfoClientOptions local_options;
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for (const auto& module : modules_) {
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CrashpadInfoClientOptions module_options;
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if (!module->GetCrashpadOptions(&module_options)) {
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continue;
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}
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if (local_options.crashpad_handler_behavior == TriState::kUnset) {
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local_options.crashpad_handler_behavior =
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module_options.crashpad_handler_behavior;
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}
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if (local_options.system_crash_reporter_forwarding == TriState::kUnset) {
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local_options.system_crash_reporter_forwarding =
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module_options.system_crash_reporter_forwarding;
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}
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if (local_options.gather_indirectly_referenced_memory == TriState::kUnset) {
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local_options.gather_indirectly_referenced_memory =
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module_options.gather_indirectly_referenced_memory;
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local_options.indirectly_referenced_memory_cap =
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module_options.indirectly_referenced_memory_cap;
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}
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// If non-default values have been found for all options, the loop can end
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// early.
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if (local_options.crashpad_handler_behavior != TriState::kUnset &&
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local_options.system_crash_reporter_forwarding != TriState::kUnset &&
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local_options.gather_indirectly_referenced_memory != TriState::kUnset) {
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break;
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}
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}
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*options = local_options;
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}
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crashpad::ProcessID ProcessSnapshotLinux::ProcessID() const {
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INITIALIZATION_STATE_DCHECK_VALID(initialized_);
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return process_reader_.ProcessID();
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}
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crashpad::ProcessID ProcessSnapshotLinux::ParentProcessID() const {
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INITIALIZATION_STATE_DCHECK_VALID(initialized_);
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return process_reader_.ParentProcessID();
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}
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void ProcessSnapshotLinux::SnapshotTime(timeval* snapshot_time) const {
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INITIALIZATION_STATE_DCHECK_VALID(initialized_);
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*snapshot_time = snapshot_time_;
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}
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void ProcessSnapshotLinux::ProcessStartTime(timeval* start_time) const {
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INITIALIZATION_STATE_DCHECK_VALID(initialized_);
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process_reader_.StartTime(start_time);
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}
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void ProcessSnapshotLinux::ProcessCPUTimes(timeval* user_time,
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timeval* system_time) const {
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INITIALIZATION_STATE_DCHECK_VALID(initialized_);
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process_reader_.CPUTimes(user_time, system_time);
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}
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void ProcessSnapshotLinux::ReportID(UUID* report_id) const {
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INITIALIZATION_STATE_DCHECK_VALID(initialized_);
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*report_id = report_id_;
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}
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void ProcessSnapshotLinux::ClientID(UUID* client_id) const {
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INITIALIZATION_STATE_DCHECK_VALID(initialized_);
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*client_id = client_id_;
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}
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const std::map<std::string, std::string>&
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ProcessSnapshotLinux::AnnotationsSimpleMap() const {
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INITIALIZATION_STATE_DCHECK_VALID(initialized_);
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return annotations_simple_map_;
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}
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const SystemSnapshot* ProcessSnapshotLinux::System() const {
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INITIALIZATION_STATE_DCHECK_VALID(initialized_);
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return &system_;
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}
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std::vector<const ThreadSnapshot*> ProcessSnapshotLinux::Threads() const {
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INITIALIZATION_STATE_DCHECK_VALID(initialized_);
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std::vector<const ThreadSnapshot*> threads;
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for (const auto& thread : threads_) {
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threads.push_back(thread.get());
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}
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return threads;
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}
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std::vector<const ModuleSnapshot*> ProcessSnapshotLinux::Modules() const {
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INITIALIZATION_STATE_DCHECK_VALID(initialized_);
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std::vector<const ModuleSnapshot*> modules;
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for (const auto& module : modules_) {
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modules.push_back(module.get());
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}
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return modules;
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}
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std::vector<UnloadedModuleSnapshot> ProcessSnapshotLinux::UnloadedModules()
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const {
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INITIALIZATION_STATE_DCHECK_VALID(initialized_);
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// TODO(jperaza): Can this be implemented on Linux?
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return std::vector<UnloadedModuleSnapshot>();
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}
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const ExceptionSnapshot* ProcessSnapshotLinux::Exception() const {
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INITIALIZATION_STATE_DCHECK_VALID(initialized_);
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return exception_.get();
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}
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std::vector<const MemoryMapRegionSnapshot*> ProcessSnapshotLinux::MemoryMap()
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const {
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INITIALIZATION_STATE_DCHECK_VALID(initialized_);
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// TODO(jperaza): do this.
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return std::vector<const MemoryMapRegionSnapshot*>();
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}
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std::vector<HandleSnapshot> ProcessSnapshotLinux::Handles() const {
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INITIALIZATION_STATE_DCHECK_VALID(initialized_);
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return std::vector<HandleSnapshot>();
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}
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std::vector<const MemorySnapshot*> ProcessSnapshotLinux::ExtraMemory() 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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const ProcessMemory* ProcessSnapshotLinux::Memory() const {
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INITIALIZATION_STATE_DCHECK_VALID(initialized_);
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return process_reader_.Memory();
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}
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void ProcessSnapshotLinux::InitializeThreads() {
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const std::vector<ProcessReaderLinux::Thread>& process_reader_threads =
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process_reader_.Threads();
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uint32_t* budget_remaining_pointer =
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options_.gather_indirectly_referenced_memory == TriState::kEnabled
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? &options_.indirectly_referenced_memory_cap
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: nullptr;
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for (const ProcessReaderLinux::Thread& process_reader_thread :
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process_reader_threads) {
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auto thread = std::make_unique<internal::ThreadSnapshotLinux>();
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if (thread->Initialize(&process_reader_,
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process_reader_thread,
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budget_remaining_pointer)) {
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threads_.push_back(std::move(thread));
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}
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}
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}
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void ProcessSnapshotLinux::InitializeModules() {
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for (const ProcessReaderLinux::Module& reader_module :
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process_reader_.Modules()) {
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auto module =
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std::make_unique<internal::ModuleSnapshotElf>(reader_module.name,
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reader_module.elf_reader,
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reader_module.type,
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&memory_range_,
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process_reader_.Memory());
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if (module->Initialize()) {
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modules_.push_back(std::move(module));
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}
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}
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}
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void ProcessSnapshotLinux::InitializeAnnotations() {
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#if BUILDFLAG(IS_ANDROID)
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const std::string& abort_message = process_reader_.AbortMessage();
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if (!abort_message.empty()) {
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annotations_simple_map_["abort_message"] = abort_message;
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}
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#endif
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}
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} // namespace crashpad
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