ipc/glue/CrashReporterHost.h
author Brian Hackett <bhackett1024@gmail.com>
Wed, 14 Nov 2018 16:09:58 -1000
changeset 446931 1c7fc8389e012c987347efefca6b35f3948b742a
parent 436926 588d96e4eec804258700aed86937c5ac1bfcab51
child 448947 6f3709b3878117466168c40affa7bca0b60cf75b
permissions -rw-r--r--
Bug 1507359 Part 2 - Bindings and internal changes to allow ReplayDebugger to control child pausing/resuming, r=mccr8.

/* -*- 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 http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_ipc_CrashReporterHost_h
#define mozilla_ipc_CrashReporterHost_h

#include <functional>

#include "mozilla/UniquePtr.h"
#include "mozilla/ipc/Shmem.h"
#include "base/process.h"
#include "nsExceptionHandler.h"
#include "nsThreadUtils.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, and simply
// holds the metadata shmem alive until the process ends. When the process
// terminates abnormally, the top-level should call GenerateCrashReport to
// automatically integrate metadata.
class CrashReporterHost
{
  typedef mozilla::ipc::Shmem Shmem;
  typedef CrashReporter::AnnotationTable AnnotationTable;

public:

  CrashReporterHost(GeckoProcessType aProcessType,
                    const Shmem& aShmem,
                    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);

  // If a minidump was already captured (e.g. via the hang reporter), this
  // finalizes the existing report by attaching metadata 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();
#else
    if (!base::OpenPrivilegedProcessHandle(aToplevelProtocol->OtherPid(),
                                           &childHandle.rwget()))
    {
      NS_WARNING("Failed to open child process handle.");
      return false;
    }
#endif

    nsCOMPtr<nsIFile> targetDump;
    if (!CrashReporter::CreateMinidumpsAndPair(childHandle,
                                               mThreadId,
                                               aPairName,
                                               aMinidumpToPair,
                                               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 nsCString& aValue);

  bool HasMinidump() const {
    return !mDumpID.IsEmpty();
  }
  const nsString& MinidumpID() const {
    MOZ_ASSERT(HasMinidump());
    return mDumpID;
  }

private:
  static void AsyncAddCrash(int32_t aProcessType, int32_t aCrashType,
                            const nsString& aChildDumpID);

  // Get the nsICrashService crash type to use for an impending crash.
  int32_t GetCrashType(const CrashReporter::AnnotationTable& aAnnotations);

  // This is a static helper function to notify the crash service that a
  // crash has occurred. 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 NotifyCrashService(
    GeckoProcessType aProcessType,
    int32_t aCrashType,
    const nsString& aChildDumpID);

private:
  GeckoProcessType mProcessType;
  Shmem mShmem;
  CrashReporter::ThreadId mThreadId;
  time_t mStartTime;
  AnnotationTable mExtraAnnotations;
  nsString mDumpID;
  bool mFinalized;
};

} // namespace ipc
} // namespace mozilla

#endif // mozilla_ipc_CrashReporterHost_h