gecko/ipc/glue/FileDescriptorUtils.h
Jed Davis 0f6f582170 Bug 973090 - IPC remoting for child GC/CC logging. r=mccr8, r=bent
This has a few semi-interdependent pieces:

* Factoring out the file opening/closing/renaming from the GC/CC logging.

* Using IPC to have the child log to files that the parent opened.

* Changing nsIMemoryInfoDumper.dumpGCAndCCLogsToFile to report completion
  of child process logging (which was impossible before this, and which is
  needed to have a meaningful test case).

* Changing about:memory to dump logs for child processes, matching the
  behavior of the "Measure" button, because it can tell the user where
  they are now.

* Add a test for multiprocess GC/CC log dumping (only of the XPCOM
  interface, not by clicking buttons and scraping the about:memory page,
  but done as a chrome mochitest to start remote browsers); based on
  test_memoryReporters2.xul in the same directory.
2014-05-13 13:13:00 -04:00

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1.6 KiB
C++

/* 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_FileDescriptorUtils_h
#define mozilla_ipc_FileDescriptorUtils_h
#include "mozilla/Attributes.h"
#include "mozilla/ipc/FileDescriptor.h"
#include "nsIRunnable.h"
#include <stdio.h>
namespace mozilla {
namespace ipc {
// When Dispatch() is called (from main thread) this class arranges to close the
// provided FileDescriptor on one of the socket transport service threads (to
// avoid main thread I/O).
class CloseFileRunnable MOZ_FINAL : public nsIRunnable
{
typedef mozilla::ipc::FileDescriptor FileDescriptor;
FileDescriptor mFileDescriptor;
public:
CloseFileRunnable(const FileDescriptor& aFileDescriptor)
#ifdef DEBUG
;
#else
: mFileDescriptor(aFileDescriptor)
{ }
#endif
NS_DECL_THREADSAFE_ISUPPORTS
NS_DECL_NSIRUNNABLE
void Dispatch();
private:
~CloseFileRunnable();
void CloseFile();
};
// On failure, FileDescriptorToFILE closes the given descriptor; on
// success, fclose()ing the returned FILE* will close the handle.
// This is meant for use with FileDescriptors received over IPC.
FILE* FileDescriptorToFILE(const FileDescriptor& aDesc,
const char* aOpenMode);
// FILEToFileDescriptor does not consume the given FILE*; it must be
// fclose()d as normal, and this does not invalidate the returned
// FileDescriptor.
FileDescriptor FILEToFileDescriptor(FILE* aStream);
} // namespace ipc
} // namespace mozilla
#endif // mozilla_ipc_FileDescriptorUtils_h