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139 lines
4.3 KiB
C++
139 lines
4.3 KiB
C++
// Copyright 2015 The Crashpad Authors. All rights reserved.
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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 "handler/mac/crash_report_exception_handler.h"
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#include "base/logging.h"
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#include "base/strings/stringprintf.h"
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#include "minidump/minidump_file_writer.h"
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#include "snapshot/mac/process_snapshot_mac.h"
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#include "util/file/file_writer.h"
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#include "util/mach/exception_behaviors.h"
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#include "util/mach/mach_extensions.h"
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#include "util/mach/scoped_task_suspend.h"
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#include "util/misc/uuid.h"
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namespace crashpad {
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namespace {
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// Calls CrashReportDatabase::ErrorWritingCrashReport() upon destruction unless
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// disarmed by calling Disarm(). Armed upon construction.
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class CallErrorWritingCrashReport {
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public:
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CallErrorWritingCrashReport(CrashReportDatabase* database,
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CrashReportDatabase::NewReport* new_report)
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: database_(database),
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new_report_(new_report) {
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}
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~CallErrorWritingCrashReport() {
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if (new_report_) {
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database_->ErrorWritingCrashReport(new_report_);
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}
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}
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void Disarm() {
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new_report_ = nullptr;
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}
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private:
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CrashReportDatabase* database_; // weak
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CrashReportDatabase::NewReport* new_report_; // weak
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DISALLOW_COPY_AND_ASSIGN(CallErrorWritingCrashReport);
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};
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} // namespace
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CrashReportExceptionHandler::CrashReportExceptionHandler(
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CrashReportDatabase* database)
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: database_(database) {
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}
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CrashReportExceptionHandler::~CrashReportExceptionHandler() {
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}
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kern_return_t CrashReportExceptionHandler::CatchMachException(
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exception_behavior_t behavior,
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exception_handler_t exception_port,
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thread_t thread,
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task_t task,
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exception_type_t exception,
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const mach_exception_data_type_t* code,
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mach_msg_type_number_t code_count,
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thread_state_flavor_t* flavor,
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const natural_t* old_state,
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mach_msg_type_number_t old_state_count,
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thread_state_t new_state,
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mach_msg_type_number_t* new_state_count,
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const mach_msg_trailer_t* trailer,
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bool* destroy_complex_request) {
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*destroy_complex_request = true;
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// The expected behavior is EXCEPTION_STATE_IDENTITY | MACH_EXCEPTION_CODES,
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// but it’s possible to deal with any exception behavior as long as it
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// carries identity information (valid thread and task ports).
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if (!ExceptionBehaviorHasIdentity(behavior)) {
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LOG(ERROR) << base::StringPrintf(
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"unexpected exception behavior 0x%x, rejecting", behavior);
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return KERN_FAILURE;
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} else if (behavior != (EXCEPTION_STATE_IDENTITY | kMachExceptionCodes)) {
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LOG(WARNING) << base::StringPrintf(
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"unexpected exception behavior 0x%x, proceeding", behavior);
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}
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if (task == mach_task_self()) {
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LOG(ERROR) << "cannot suspend myself";
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return KERN_FAILURE;
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}
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ScopedTaskSuspend suspend(task);
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ProcessSnapshotMac process_snapshot;
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if (!process_snapshot.Initialize(task)) {
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return KERN_FAILURE;
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}
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CrashReportDatabase::NewReport* new_report;
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CrashReportDatabase::OperationStatus database_status =
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database_->PrepareNewCrashReport(&new_report);
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if (database_status != CrashReportDatabase::kNoError) {
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return KERN_FAILURE;
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}
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CallErrorWritingCrashReport call_error_writing_crash_report(database_,
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new_report);
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WeakFileHandleFileWriter file_writer(new_report->handle);
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MinidumpFileWriter minidump;
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minidump.InitializeFromSnapshot(&process_snapshot);
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if (!minidump.WriteEverything(&file_writer)) {
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return KERN_FAILURE;
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}
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call_error_writing_crash_report.Disarm();
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UUID uuid;
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database_status = database_->FinishedWritingCrashReport(new_report, &uuid);
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if (database_status != CrashReportDatabase::kNoError) {
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return KERN_FAILURE;
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}
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return ExcServerSuccessfulReturnValue(behavior, false);
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}
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} // namespace crashpad
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