mirror of
https://github.com/HeyPuter/firefox.git
synced 2026-11-13 20:14:57 -10:00
101 lines
2.7 KiB
C++
101 lines
2.7 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* 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/. */
|
|
|
|
#include <stdio.h>
|
|
#ifdef XP_WIN
|
|
#include <process.h>
|
|
#define getpid _getpid
|
|
#else
|
|
#include <signal.h>
|
|
#include <unistd.h>
|
|
#endif
|
|
#include "mozilla/CodeCoverageHandler.h"
|
|
#include "mozilla/ClearOnShutdown.h"
|
|
#include "mozilla/DebugOnly.h"
|
|
#include "nsAppRunner.h"
|
|
|
|
using namespace mozilla;
|
|
|
|
// The __gcov_flush function writes the coverage counters to gcda files and then resets them to zero.
|
|
// It is defined at https://github.com/gcc-mirror/gcc/blob/aad93da1a579b9ae23ede6b9cf8523360f0a08b4/libgcc/libgcov-interface.c.
|
|
// __gcov_flush is protected by a mutex in GCC, but not in LLVM, so we are using a CrossProcessMutex to protect it.
|
|
|
|
extern "C" void __gcov_flush();
|
|
|
|
StaticAutoPtr<CodeCoverageHandler> CodeCoverageHandler::instance;
|
|
|
|
void CodeCoverageHandler::FlushCounters()
|
|
{
|
|
printf_stderr("[CodeCoverage] Requested flush for %d.\n", getpid());
|
|
|
|
CrossProcessMutexAutoLock lock(*CodeCoverageHandler::Get()->GetMutex());
|
|
|
|
__gcov_flush();
|
|
printf_stderr("[CodeCoverage] flush completed.\n");
|
|
}
|
|
|
|
void CodeCoverageHandler::FlushCountersSignalHandler(int)
|
|
{
|
|
FlushCounters();
|
|
}
|
|
|
|
void CodeCoverageHandler::SetSignalHandlers()
|
|
{
|
|
#ifndef XP_WIN
|
|
printf_stderr("[CodeCoverage] Setting handlers for process %d.\n", getpid());
|
|
|
|
struct sigaction dump_sa;
|
|
dump_sa.sa_handler = CodeCoverageHandler::FlushCountersSignalHandler;
|
|
dump_sa.sa_flags = SA_RESTART;
|
|
sigemptyset(&dump_sa.sa_mask);
|
|
DebugOnly<int> r1 = sigaction(SIGUSR1, &dump_sa, nullptr);
|
|
MOZ_ASSERT(r1 == 0, "Failed to install GCOV SIGUSR1 handler");
|
|
#endif
|
|
}
|
|
|
|
CodeCoverageHandler::CodeCoverageHandler()
|
|
: mGcovLock("GcovLock")
|
|
{
|
|
SetSignalHandlers();
|
|
}
|
|
|
|
CodeCoverageHandler::CodeCoverageHandler(const CrossProcessMutexHandle& aHandle)
|
|
: mGcovLock(aHandle)
|
|
{
|
|
SetSignalHandlers();
|
|
}
|
|
|
|
void CodeCoverageHandler::Init()
|
|
{
|
|
MOZ_ASSERT(!instance);
|
|
MOZ_ASSERT(XRE_IsParentProcess());
|
|
instance = new CodeCoverageHandler();
|
|
ClearOnShutdown(&instance);
|
|
}
|
|
|
|
void CodeCoverageHandler::Init(const CrossProcessMutexHandle& aHandle)
|
|
{
|
|
MOZ_ASSERT(!instance);
|
|
MOZ_ASSERT(!XRE_IsParentProcess());
|
|
instance = new CodeCoverageHandler(aHandle);
|
|
ClearOnShutdown(&instance);
|
|
}
|
|
|
|
CodeCoverageHandler* CodeCoverageHandler::Get()
|
|
{
|
|
MOZ_ASSERT(instance);
|
|
return instance;
|
|
}
|
|
|
|
CrossProcessMutex* CodeCoverageHandler::GetMutex()
|
|
{
|
|
return &mGcovLock;
|
|
}
|
|
|
|
CrossProcessMutexHandle CodeCoverageHandler::GetMutexHandle(int aProcId)
|
|
{
|
|
return mGcovLock.ShareToProcess(aProcId);
|
|
}
|