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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at */
#ifndef mozilla_ipc_CrashReporterHost_h
#define mozilla_ipc_CrashReporterHost_h
#include <functional>
#include "mozilla/UniquePtr.h"
#include "base/process.h"
#include "nsExceptionHandler.h"
#include "nsThreadUtils.h"
#include "mozilla/ipc/ProtocolUtils.h"
namespace mozilla {
namespace ipc {
// This is the newer replacement for CrashReporterParent. It is created in
// response to a InitCrashReporter message on a top-level actor. When the
// process terminates abnormally, the top-level should call GenerateCrashReport
// to automatically integrate metadata.
class CrashReporterHost {
typedef CrashReporter::AnnotationTable AnnotationTable;
CrashReporterHost(GeckoProcessType aProcessType,
CrashReporter::ThreadId aThreadId);
// Helper function for generating a crash report for a process that probably
// crashed (i.e., had an AbnormalShutdown in ActorDestroy). Returns true if
// the process has a minidump attached and we were able to generate a report.
bool GenerateCrashReport(base::ProcessId aPid);
// Given an existing minidump for a crashed child process, take ownership of
// it from IPDL. After this, FinalizeCrashReport may be called.
RefPtr<nsIFile> TakeCrashedChildMinidump(base::ProcessId aPid,
uint32_t* aOutSequence);
// Replace the stored minidump with a new one. After this,
// FinalizeCrashReport may be called.
bool AdoptMinidump(nsIFile* aFile, const AnnotationTable& aAnnotations);
// If a minidump was already captured (e.g. via the hang reporter), this
// finalizes the existing report by attaching metadata, writing out the
// .extra file and notifying the crash service.
bool FinalizeCrashReport();
// Generate a paired minidump. This does not take the crash report, as
// GenerateCrashReport does. After this, FinalizeCrashReport may be called.
// This calls TakeCrashedChildMinidump and FinalizeCrashReport.
template <typename Toplevel>
bool GenerateMinidumpAndPair(Toplevel* aToplevelProtocol,
nsIFile* aMinidumpToPair,
const nsACString& aPairName) {
ScopedProcessHandle childHandle;
#ifdef XP_MACOSX
childHandle = aToplevelProtocol->Process()->GetChildTask();
if (!base::OpenPrivilegedProcessHandle(aToplevelProtocol->OtherPid(),
&childHandle.rwget())) {
NS_WARNING("Failed to open child process handle.");
return false;
nsCOMPtr<nsIFile> targetDump;
if (!CrashReporter::CreateMinidumpsAndPair(
childHandle, mThreadId, aPairName, aMinidumpToPair,
mExtraAnnotations, getter_AddRefs(targetDump))) {
return false;
return CrashReporter::GetIDFromMinidump(targetDump, mDumpID);
void AddAnnotation(CrashReporter::Annotation aKey, bool aValue);
void AddAnnotation(CrashReporter::Annotation aKey, int aValue);
void AddAnnotation(CrashReporter::Annotation aKey, unsigned int aValue);
void AddAnnotation(CrashReporter::Annotation aKey, const nsACString& aValue);
bool HasMinidump() const { return !mDumpID.IsEmpty(); }
const nsString& MinidumpID() const {
return mDumpID;
const nsCString& AdditionalMinidumps() const {
return mExtraAnnotations[CrashReporter::Annotation::additional_minidumps];
// Return `true` if this crash reporter has been identified as a likely OOM.
// At the time of this writing, OOMs detection is considered reliable under
// Windows but other platforms quite often return false negatives.
// `CrashReporterHost::FinalizeCrashReport()` MUST have been called already.
bool IsLikelyOOM();
// This is a static helper function to notify the crash service that a
// crash has occurred and record the crash with telemetry. This can be called
// from any thread, and if not called from the main thread, will post a
// synchronous message to the main thread.
static void RecordCrash(GeckoProcessType aProcessType, int32_t aCrashType,
const nsString& aChildDumpID);
// Get the nsICrashService crash type to use for an impending crash.
int32_t GetCrashType();
static void RecordCrashWithTelemetry(GeckoProcessType aProcessType,
int32_t aCrashType);
static void NotifyCrashService(GeckoProcessType aProcessType,
int32_t aCrashType,
const nsString& aChildDumpID);
GeckoProcessType mProcessType;
CrashReporter::ThreadId mThreadId;
time_t mStartTime;
AnnotationTable mExtraAnnotations;
nsString mDumpID;
bool mFinalized;
} // namespace ipc
} // namespace mozilla
#endif // mozilla_ipc_CrashReporterHost_h