forked from mirrors/gecko-dev
62565b25fc
Split the GetCodeCoverageSummary API into a variant for a specific realm vs checking all realms. This restores the original behaviour of the getLcovInfo testing function to only return info on current realm. This makes testing OOM behaviour much more predictable. Differential Revision: https://phabricator.services.mozilla.com/D46167 --HG-- extra : moz-landing-system : lando
144 lines
4.3 KiB
C++
144 lines
4.3 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include <stdio.h>
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#ifdef XP_WIN
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# include <process.h>
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# define getpid _getpid
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#else
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# include <signal.h>
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# include <unistd.h>
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#endif
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#include "mozilla/dom/ScriptSettings.h" // for AutoJSAPI
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#include "mozilla/CodeCoverageHandler.h"
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#include "mozilla/ClearOnShutdown.h"
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#include "mozilla/DebugOnly.h"
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#include "nsAppRunner.h"
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#include "nsIOutputStream.h"
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#include "nsNetUtil.h"
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#include "nsPrintfCString.h"
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#include "prtime.h"
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using namespace mozilla;
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// The __gcov_flush function writes the coverage counters to gcda files and then
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// resets them to zero. It is defined at
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// https://github.com/gcc-mirror/gcc/blob/aad93da1a579b9ae23ede6b9cf8523360f0a08b4/libgcc/libgcov-interface.c.
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// __gcov_flush is protected by a mutex in GCC, but not in LLVM, so we are using
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// a CrossProcessMutex to protect it.
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// We rename __gcov_flush to __custom_llvm_gcov_flush in our build of LLVM for
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// Linux, to avoid naming clashes in builds which mix GCC and LLVM. So, when we
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// are building with LLVM exclusively, we need to use __custom_llvm_gcov_flush
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// instead.
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#if !defined(XP_WIN) && defined(__clang__)
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# define __gcov_flush __custom_llvm_gcov_flush
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#endif
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extern "C" void __gcov_flush();
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StaticAutoPtr<CodeCoverageHandler> CodeCoverageHandler::instance;
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void CodeCoverageHandler::FlushCounters() {
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printf_stderr("[CodeCoverage] Requested flush for %d.\n", getpid());
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CrossProcessMutexAutoLock lock(*CodeCoverageHandler::Get()->GetMutex());
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__gcov_flush();
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printf_stderr("[CodeCoverage] flush completed.\n");
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const char* outDir = getenv("JS_CODE_COVERAGE_OUTPUT_DIR");
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if (!outDir || *outDir == 0) {
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return;
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}
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dom::AutoJSAPI jsapi;
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jsapi.Init();
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size_t length;
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JS::UniqueChars result = js::GetCodeCoverageSummaryAll(jsapi.cx(), &length);
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if (!result) {
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return;
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}
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nsCOMPtr<nsIFile> file;
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nsresult rv = NS_NewNativeLocalFile(nsDependentCString(outDir), false,
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getter_AddRefs(file));
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MOZ_ASSERT(NS_SUCCEEDED(rv));
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rv = file->AppendNative(
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nsPrintfCString("%lu-%d.info", PR_Now() / PR_USEC_PER_MSEC, getpid()));
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rv = file->CreateUnique(nsIFile::NORMAL_FILE_TYPE, 0666);
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MOZ_ASSERT(NS_SUCCEEDED(rv));
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nsCOMPtr<nsIOutputStream> outputStream;
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rv = NS_NewLocalFileOutputStream(getter_AddRefs(outputStream), file);
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MOZ_ASSERT(NS_SUCCEEDED(rv));
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char* data = result.get();
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while (length) {
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uint32_t n = 0;
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rv = outputStream->Write(data, length, &n);
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MOZ_ASSERT(NS_SUCCEEDED(rv));
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data += n;
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length -= n;
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}
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rv = outputStream->Close();
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MOZ_ASSERT(NS_SUCCEEDED(rv));
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printf_stderr("[CodeCoverage] JS flush completed.\n");
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}
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void CodeCoverageHandler::FlushCountersSignalHandler(int) { FlushCounters(); }
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void CodeCoverageHandler::SetSignalHandlers() {
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#ifndef XP_WIN
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printf_stderr("[CodeCoverage] Setting handlers for process %d.\n", getpid());
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struct sigaction dump_sa;
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dump_sa.sa_handler = CodeCoverageHandler::FlushCountersSignalHandler;
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dump_sa.sa_flags = SA_RESTART;
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sigemptyset(&dump_sa.sa_mask);
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DebugOnly<int> r1 = sigaction(SIGUSR1, &dump_sa, nullptr);
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MOZ_ASSERT(r1 == 0, "Failed to install GCOV SIGUSR1 handler");
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#endif
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}
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CodeCoverageHandler::CodeCoverageHandler() : mGcovLock("GcovLock") {
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SetSignalHandlers();
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}
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CodeCoverageHandler::CodeCoverageHandler(const CrossProcessMutexHandle& aHandle)
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: mGcovLock(aHandle) {
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SetSignalHandlers();
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}
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void CodeCoverageHandler::Init() {
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MOZ_ASSERT(!instance);
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MOZ_ASSERT(XRE_IsParentProcess());
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instance = new CodeCoverageHandler();
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ClearOnShutdown(&instance);
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}
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void CodeCoverageHandler::Init(const CrossProcessMutexHandle& aHandle) {
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MOZ_ASSERT(!instance);
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MOZ_ASSERT(!XRE_IsParentProcess());
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instance = new CodeCoverageHandler(aHandle);
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ClearOnShutdown(&instance);
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}
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CodeCoverageHandler* CodeCoverageHandler::Get() {
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MOZ_ASSERT(instance);
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return instance;
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}
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CrossProcessMutex* CodeCoverageHandler::GetMutex() { return &mGcovLock; }
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CrossProcessMutexHandle CodeCoverageHandler::GetMutexHandle(int aProcId) {
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return mGcovLock.ShareToProcess(aProcId);
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}
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