mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-12-07 05:15:09 +00:00
693 lines
20 KiB
C++
693 lines
20 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
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include <string>
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#include <stdio.h>
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#include <fstream>
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#include <sstream>
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#include "GeckoProfiler.h"
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#include "SaveProfileTask.h"
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#include "ProfileEntry.h"
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#include "SyncProfile.h"
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#include "platform.h"
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#include "nsThreadUtils.h"
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#include "prenv.h"
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#include "prtime.h"
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#include "shared-libraries.h"
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#include "mozilla/StackWalk.h"
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#include "TableTicker.h"
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#include "nsXULAppAPI.h"
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// JSON
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#include "JSObjectBuilder.h"
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#include "JSCustomObjectBuilder.h"
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// Meta
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#include "nsXPCOM.h"
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#include "nsXPCOMCID.h"
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#include "nsIHttpProtocolHandler.h"
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#include "nsServiceManagerUtils.h"
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#include "nsIXULRuntime.h"
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#include "nsIXULAppInfo.h"
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#include "nsDirectoryServiceUtils.h"
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#include "nsDirectoryServiceDefs.h"
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#include "nsIObserverService.h"
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#include "mozilla/Services.h"
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#include "PlatformMacros.h"
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#if defined(SPS_OS_android) && !defined(MOZ_WIDGET_GONK)
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#include "AndroidBridge.h"
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#endif
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// JS
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#include "js/OldDebugAPI.h"
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#if defined(MOZ_PROFILING) && (defined(XP_MACOSX) || defined(XP_WIN))
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#define USE_NS_STACKWALK
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#endif
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#ifdef USE_NS_STACKWALK
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#include "nsStackWalk.h"
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#endif
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#if defined(XP_WIN)
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typedef CONTEXT tickcontext_t;
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#elif defined(LINUX)
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#include <ucontext.h>
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typedef ucontext_t tickcontext_t;
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#endif
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#if defined(LINUX) || defined(XP_MACOSX)
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#include <sys/types.h>
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pid_t gettid();
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#endif
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#if defined(SPS_ARCH_arm) && defined(MOZ_WIDGET_GONK)
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// Should also work on other Android and ARM Linux, but not tested there yet.
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#define USE_EHABI_STACKWALK
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#endif
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#ifdef USE_EHABI_STACKWALK
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#include "EHABIStackWalk.h"
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#endif
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using std::string;
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using namespace mozilla;
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#ifndef MAXPATHLEN
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#ifdef PATH_MAX
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#define MAXPATHLEN PATH_MAX
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#elif defined(MAX_PATH)
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#define MAXPATHLEN MAX_PATH
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#elif defined(_MAX_PATH)
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#define MAXPATHLEN _MAX_PATH
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#elif defined(CCHMAXPATH)
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#define MAXPATHLEN CCHMAXPATH
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#else
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#define MAXPATHLEN 1024
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#endif
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#endif
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///////////////////////////////////////////////////////////////////////
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// BEGIN SaveProfileTask et al
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std::string GetSharedLibraryInfoString();
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void TableTicker::HandleSaveRequest()
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{
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if (!mSaveRequested)
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return;
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mSaveRequested = false;
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// TODO: Use use the ipc/chromium Tasks here to support processes
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// without XPCOM.
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nsCOMPtr<nsIRunnable> runnable = new SaveProfileTask();
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NS_DispatchToMainThread(runnable);
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}
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template <typename Builder>
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typename Builder::Object TableTicker::GetMetaJSCustomObject(Builder& b)
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{
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typename Builder::RootedObject meta(b.context(), b.CreateObject());
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b.DefineProperty(meta, "version", 2);
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b.DefineProperty(meta, "interval", interval());
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b.DefineProperty(meta, "stackwalk", mUseStackWalk);
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b.DefineProperty(meta, "jank", mJankOnly);
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b.DefineProperty(meta, "processType", XRE_GetProcessType());
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TimeDuration delta = TimeStamp::Now() - sStartTime;
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b.DefineProperty(meta, "startTime", PR_Now()/1000.0 - delta.ToMilliseconds());
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nsresult res;
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nsCOMPtr<nsIHttpProtocolHandler> http = do_GetService(NS_NETWORK_PROTOCOL_CONTRACTID_PREFIX "http", &res);
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if (!NS_FAILED(res)) {
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nsAutoCString string;
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res = http->GetPlatform(string);
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if (!NS_FAILED(res))
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b.DefineProperty(meta, "platform", string.Data());
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res = http->GetOscpu(string);
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if (!NS_FAILED(res))
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b.DefineProperty(meta, "oscpu", string.Data());
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res = http->GetMisc(string);
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if (!NS_FAILED(res))
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b.DefineProperty(meta, "misc", string.Data());
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}
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nsCOMPtr<nsIXULRuntime> runtime = do_GetService("@mozilla.org/xre/runtime;1");
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if (runtime) {
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nsAutoCString string;
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res = runtime->GetXPCOMABI(string);
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if (!NS_FAILED(res))
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b.DefineProperty(meta, "abi", string.Data());
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res = runtime->GetWidgetToolkit(string);
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if (!NS_FAILED(res))
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b.DefineProperty(meta, "toolkit", string.Data());
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}
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nsCOMPtr<nsIXULAppInfo> appInfo = do_GetService("@mozilla.org/xre/app-info;1");
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if (appInfo) {
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nsAutoCString string;
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res = appInfo->GetName(string);
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if (!NS_FAILED(res))
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b.DefineProperty(meta, "product", string.Data());
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}
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return meta;
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}
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void TableTicker::ToStreamAsJSON(std::ostream& stream)
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{
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JSCustomObjectBuilder b;
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JSCustomObject* profile = b.CreateObject();
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BuildJSObject(b, profile);
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b.Serialize(profile, stream);
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b.DeleteObject(profile);
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}
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JSObject* TableTicker::ToJSObject(JSContext *aCx)
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{
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JSObjectBuilder b(aCx);
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JS::RootedObject profile(aCx, b.CreateObject());
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BuildJSObject(b, profile);
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return profile;
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}
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template <typename Builder>
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struct SubprocessClosure {
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SubprocessClosure(Builder *aBuilder, typename Builder::ArrayHandle aThreads)
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: mBuilder(aBuilder), mThreads(aThreads)
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{}
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Builder* mBuilder;
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typename Builder::ArrayHandle mThreads;
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};
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template <typename Builder>
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void SubProcessCallback(const char* aProfile, void* aClosure)
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{
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// Called by the observer to get their profile data included
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// as a sub profile
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SubprocessClosure<Builder>* closure = (SubprocessClosure<Builder>*)aClosure;
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closure->mBuilder->ArrayPush(closure->mThreads, aProfile);
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}
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#if defined(SPS_OS_android) && !defined(MOZ_WIDGET_GONK)
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template <typename Builder>
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static
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typename Builder::Object BuildJavaThreadJSObject(Builder& b)
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{
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typename Builder::RootedObject javaThread(b.context(), b.CreateObject());
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b.DefineProperty(javaThread, "name", "Java Main Thread");
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typename Builder::RootedArray samples(b.context(), b.CreateArray());
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b.DefineProperty(javaThread, "samples", samples);
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int sampleId = 0;
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while (true) {
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int frameId = 0;
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typename Builder::RootedObject sample(b.context());
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typename Builder::RootedArray frames(b.context());
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while (true) {
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nsCString result;
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bool hasFrame = AndroidBridge::Bridge()->GetFrameNameJavaProfiling(0, sampleId, frameId, result);
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if (!hasFrame) {
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if (frames) {
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b.DefineProperty(sample, "frames", frames);
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}
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break;
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}
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if (!sample) {
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sample = b.CreateObject();
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frames = b.CreateArray();
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b.DefineProperty(sample, "frames", frames);
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b.ArrayPush(samples, sample);
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double sampleTime = GeckoJavaSampler::GetSampleTimeJavaProfiling(0, sampleId);
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b.DefineProperty(sample, "time", sampleTime);
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}
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typename Builder::RootedObject frame(b.context(), b.CreateObject());
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b.DefineProperty(frame, "location", result.BeginReading());
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b.ArrayPush(frames, frame);
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frameId++;
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}
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if (frameId == 0) {
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break;
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}
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sampleId++;
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}
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return javaThread;
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}
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#endif
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template <typename Builder>
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void TableTicker::BuildJSObject(Builder& b, typename Builder::ObjectHandle profile)
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{
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// Put shared library info
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b.DefineProperty(profile, "libs", GetSharedLibraryInfoString().c_str());
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// Put meta data
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typename Builder::RootedObject meta(b.context(), GetMetaJSCustomObject(b));
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b.DefineProperty(profile, "meta", meta);
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// Lists the samples for each ThreadProfile
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typename Builder::RootedArray threads(b.context(), b.CreateArray());
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b.DefineProperty(profile, "threads", threads);
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SetPaused(true);
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{
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mozilla::MutexAutoLock lock(*sRegisteredThreadsMutex);
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for (size_t i = 0; i < sRegisteredThreads->size(); i++) {
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// Thread not being profiled, skip it
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if (!sRegisteredThreads->at(i)->Profile())
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continue;
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MutexAutoLock lock(*sRegisteredThreads->at(i)->Profile()->GetMutex());
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typename Builder::RootedObject threadSamples(b.context(), b.CreateObject());
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sRegisteredThreads->at(i)->Profile()->BuildJSObject(b, threadSamples);
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b.ArrayPush(threads, threadSamples);
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}
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}
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#if defined(SPS_OS_android) && !defined(MOZ_WIDGET_GONK)
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if (ProfileJava()) {
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GeckoJavaSampler::PauseJavaProfiling();
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typename Builder::RootedObject javaThread(b.context(), BuildJavaThreadJSObject(b));
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b.ArrayPush(threads, javaThread);
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GeckoJavaSampler::UnpauseJavaProfiling();
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}
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#endif
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SetPaused(false);
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// Send a event asking any subprocesses (plugins) to
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// give us their information
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SubprocessClosure<Builder> closure(&b, threads);
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nsCOMPtr<nsIObserverService> os = mozilla::services::GetObserverService();
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if (os) {
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nsRefPtr<ProfileSaveEvent> pse = new ProfileSaveEvent(SubProcessCallback<Builder>, &closure);
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os->NotifyObservers(pse, "profiler-subprocess", nullptr);
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}
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}
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// END SaveProfileTask et al
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////////////////////////////////////////////////////////////////////////
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static
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void addDynamicTag(ThreadProfile &aProfile, char aTagName, const char *aStr)
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{
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aProfile.addTag(ProfileEntry(aTagName, ""));
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// Add one to store the null termination
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size_t strLen = strlen(aStr) + 1;
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for (size_t j = 0; j < strLen;) {
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// Store as many characters in the void* as the platform allows
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char text[sizeof(void*)];
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size_t len = sizeof(void*)/sizeof(char);
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if (j+len >= strLen) {
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len = strLen - j;
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}
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memcpy(text, &aStr[j], len);
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j += sizeof(void*)/sizeof(char);
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// Cast to *((void**) to pass the text data to a void*
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aProfile.addTag(ProfileEntry('d', *((void**)(&text[0]))));
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}
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}
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static
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void addProfileEntry(volatile StackEntry &entry, ThreadProfile &aProfile,
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PseudoStack *stack, void *lastpc)
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{
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int lineno = -1;
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// First entry has tagName 's' (start)
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// Check for magic pointer bit 1 to indicate copy
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const char* sampleLabel = entry.label();
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if (entry.isCopyLabel()) {
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// Store the string using 1 or more 'd' (dynamic) tags
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// that will happen to the preceding tag
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addDynamicTag(aProfile, 'c', sampleLabel);
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if (entry.js()) {
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if (!entry.pc()) {
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// The JIT only allows the top-most entry to have a nullptr pc
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MOZ_ASSERT(&entry == &stack->mStack[stack->stackSize() - 1]);
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// If stack-walking was disabled, then that's just unfortunate
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if (lastpc) {
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jsbytecode *jspc = js::ProfilingGetPC(stack->mRuntime, entry.script(),
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lastpc);
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if (jspc) {
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lineno = JS_PCToLineNumber(nullptr, entry.script(), jspc);
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}
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}
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} else {
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lineno = JS_PCToLineNumber(nullptr, entry.script(), entry.pc());
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}
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} else {
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lineno = entry.line();
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}
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} else {
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aProfile.addTag(ProfileEntry('c', sampleLabel));
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lineno = entry.line();
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}
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if (lineno != -1) {
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aProfile.addTag(ProfileEntry('n', lineno));
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}
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}
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#if defined(USE_NS_STACKWALK) || defined(USE_EHABI_STACKWALK)
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typedef struct {
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void** array;
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void** sp_array;
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size_t size;
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size_t count;
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} PCArray;
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static void mergeNativeBacktrace(ThreadProfile &aProfile, const PCArray &array) {
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aProfile.addTag(ProfileEntry('s', "(root)"));
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PseudoStack* stack = aProfile.GetPseudoStack();
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uint32_t pseudoStackPos = 0;
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/* We have two stacks, the native C stack we extracted from unwinding,
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* and the pseudostack we managed during execution. We want to consolidate
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* the two in order. We do so by merging using the approximate stack address
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* when each entry was push. When pushing JS entry we may not now the stack
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* address in which case we have a nullptr stack address in which case we assume
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* that it follows immediatly the previous element.
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*
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* C Stack | Address -- Pseudo Stack | Address
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* main() | 0x100 run_js() | 0x40
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* start() | 0x80 jsCanvas() | nullptr
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* timer() | 0x50 drawLine() | nullptr
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* azure() | 0x10
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*
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* Merged: main(), start(), timer(), run_js(), jsCanvas(), drawLine(), azure()
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*/
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// i is the index in C stack starting at main and decreasing
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// pseudoStackPos is the position in the Pseudo stack starting
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// at the first frame (run_js in the example) and increasing.
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for (size_t i = array.count; i > 0; --i) {
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while (pseudoStackPos < stack->stackSize()) {
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volatile StackEntry& entry = stack->mStack[pseudoStackPos];
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if (entry.stackAddress() < array.sp_array[i-1] && entry.stackAddress())
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break;
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addProfileEntry(entry, aProfile, stack, array.array[0]);
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pseudoStackPos++;
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}
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aProfile.addTag(ProfileEntry('l', (void*)array.array[i-1]));
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}
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}
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#endif
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#ifdef USE_NS_STACKWALK
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static
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void StackWalkCallback(void* aPC, void* aSP, void* aClosure)
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{
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PCArray* array = static_cast<PCArray*>(aClosure);
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MOZ_ASSERT(array->count < array->size);
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array->sp_array[array->count] = aSP;
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array->array[array->count] = aPC;
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array->count++;
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}
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void TableTicker::doNativeBacktrace(ThreadProfile &aProfile, TickSample* aSample)
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{
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#ifndef XP_MACOSX
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uintptr_t thread = GetThreadHandle(aSample->threadProfile->GetPlatformData());
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MOZ_ASSERT(thread);
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#endif
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void* pc_array[1000];
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void* sp_array[1000];
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PCArray array = {
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pc_array,
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sp_array,
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mozilla::ArrayLength(pc_array),
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0
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};
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// Start with the current function.
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StackWalkCallback(aSample->pc, aSample->sp, &array);
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uint32_t maxFrames = uint32_t(array.size - array.count);
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#ifdef XP_MACOSX
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pthread_t pt = GetProfiledThread(aSample->threadProfile->GetPlatformData());
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void *stackEnd = reinterpret_cast<void*>(-1);
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if (pt)
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stackEnd = static_cast<char*>(pthread_get_stackaddr_np(pt));
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nsresult rv = NS_OK;
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if (aSample->fp >= aSample->sp && aSample->fp <= stackEnd)
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rv = FramePointerStackWalk(StackWalkCallback, /* skipFrames */ 0,
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maxFrames, &array,
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reinterpret_cast<void**>(aSample->fp), stackEnd);
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#else
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void *platformData = nullptr;
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#ifdef XP_WIN
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if (aSample->isSamplingCurrentThread) {
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// In this case we want NS_StackWalk to know that it's walking the
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// current thread's stack, so we pass 0 as the thread handle.
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thread = 0;
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}
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platformData = aSample->context;
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#endif // XP_WIN
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nsresult rv = NS_StackWalk(StackWalkCallback, /* skipFrames */ 0, maxFrames,
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&array, thread, platformData);
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#endif
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if (NS_SUCCEEDED(rv))
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mergeNativeBacktrace(aProfile, array);
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}
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#endif
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#ifdef USE_EHABI_STACKWALK
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void TableTicker::doNativeBacktrace(ThreadProfile &aProfile, TickSample* aSample)
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{
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void *pc_array[1000];
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void *sp_array[1000];
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PCArray array = {
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pc_array,
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sp_array,
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mozilla::ArrayLength(pc_array),
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0
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};
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ucontext_t *ucontext = reinterpret_cast<ucontext_t *>(aSample->context);
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array.count = EHABIStackWalk(ucontext->uc_mcontext, aProfile.GetStackTop(),
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sp_array, pc_array, array.size);
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mergeNativeBacktrace(aProfile, array);
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}
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#endif
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static
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void doSampleStackTrace(PseudoStack *aStack, ThreadProfile &aProfile, TickSample *sample)
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{
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// Sample
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// 's' tag denotes the start of a sample block
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// followed by 0 or more 'c' tags.
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aProfile.addTag(ProfileEntry('s', "(root)"));
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for (uint32_t i = 0; i < aStack->stackSize(); i++) {
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addProfileEntry(aStack->mStack[i], aProfile, aStack, nullptr);
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}
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#ifdef ENABLE_SPS_LEAF_DATA
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if (sample) {
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aProfile.addTag(ProfileEntry('l', (void*)sample->pc));
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#ifdef ENABLE_ARM_LR_SAVING
|
|
aProfile.addTag(ProfileEntry('L', (void*)sample->lr));
|
|
#endif
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void TableTicker::Tick(TickSample* sample)
|
|
{
|
|
if (HasUnwinderThread()) {
|
|
UnwinderTick(sample);
|
|
} else {
|
|
InplaceTick(sample);
|
|
}
|
|
}
|
|
|
|
void TableTicker::InplaceTick(TickSample* sample)
|
|
{
|
|
ThreadProfile& currThreadProfile = *sample->threadProfile;
|
|
|
|
PseudoStack* stack = currThreadProfile.GetPseudoStack();
|
|
bool recordSample = true;
|
|
#if defined(XP_WIN)
|
|
bool powerSample = false;
|
|
#endif
|
|
|
|
/* Don't process the PeudoStack's markers or honour jankOnly if we're
|
|
immediately sampling the current thread. */
|
|
if (!sample->isSamplingCurrentThread) {
|
|
// Marker(s) come before the sample
|
|
ProfilerMarkerLinkedList* pendingMarkersList = stack->getPendingMarkers();
|
|
while (pendingMarkersList && pendingMarkersList->peek()) {
|
|
ProfilerMarker* marker = pendingMarkersList->popHead();
|
|
stack->addStoredMarker(marker);
|
|
currThreadProfile.addTag(ProfileEntry('m', marker));
|
|
}
|
|
stack->updateGeneration(currThreadProfile.GetGenerationID());
|
|
|
|
#if defined(XP_WIN)
|
|
if (mProfilePower) {
|
|
mIntelPowerGadget->TakeSample();
|
|
powerSample = true;
|
|
}
|
|
#endif
|
|
|
|
if (mJankOnly) {
|
|
// if we are on a different event we can discard any temporary samples
|
|
// we've kept around
|
|
if (sLastSampledEventGeneration != sCurrentEventGeneration) {
|
|
// XXX: we also probably want to add an entry to the profile to help
|
|
// distinguish which samples are part of the same event. That, or record
|
|
// the event generation in each sample
|
|
currThreadProfile.erase();
|
|
}
|
|
sLastSampledEventGeneration = sCurrentEventGeneration;
|
|
|
|
recordSample = false;
|
|
// only record the events when we have a we haven't seen a tracer event for 100ms
|
|
if (!sLastTracerEvent.IsNull()) {
|
|
TimeDuration delta = sample->timestamp - sLastTracerEvent;
|
|
if (delta.ToMilliseconds() > 100.0) {
|
|
recordSample = true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#if defined(USE_NS_STACKWALK) || defined(USE_EHABI_STACKWALK)
|
|
if (mUseStackWalk) {
|
|
doNativeBacktrace(currThreadProfile, sample);
|
|
} else {
|
|
doSampleStackTrace(stack, currThreadProfile, mAddLeafAddresses ? sample : nullptr);
|
|
}
|
|
#else
|
|
doSampleStackTrace(stack, currThreadProfile, mAddLeafAddresses ? sample : nullptr);
|
|
#endif
|
|
|
|
if (recordSample)
|
|
currThreadProfile.flush();
|
|
|
|
if (!sLastTracerEvent.IsNull() && sample && currThreadProfile.IsMainThread()) {
|
|
TimeDuration delta = sample->timestamp - sLastTracerEvent;
|
|
currThreadProfile.addTag(ProfileEntry('r', delta.ToMilliseconds()));
|
|
}
|
|
|
|
if (sample) {
|
|
TimeDuration delta = sample->timestamp - sStartTime;
|
|
currThreadProfile.addTag(ProfileEntry('t', delta.ToMilliseconds()));
|
|
}
|
|
|
|
#if defined(XP_WIN)
|
|
if (powerSample) {
|
|
currThreadProfile.addTag(ProfileEntry('p', mIntelPowerGadget->GetTotalPackagePowerInWatts()));
|
|
}
|
|
#endif
|
|
|
|
if (sLastFrameNumber != sFrameNumber) {
|
|
currThreadProfile.addTag(ProfileEntry('f', sFrameNumber));
|
|
sLastFrameNumber = sFrameNumber;
|
|
}
|
|
}
|
|
|
|
namespace {
|
|
|
|
SyncProfile* NewSyncProfile()
|
|
{
|
|
PseudoStack* stack = tlsPseudoStack.get();
|
|
if (!stack) {
|
|
MOZ_ASSERT(stack);
|
|
return nullptr;
|
|
}
|
|
Thread::tid_t tid = Thread::GetCurrentId();
|
|
|
|
SyncProfile* profile = new SyncProfile("SyncProfile",
|
|
GET_BACKTRACE_DEFAULT_ENTRY,
|
|
stack, tid, NS_IsMainThread());
|
|
return profile;
|
|
}
|
|
|
|
} // anonymous namespace
|
|
|
|
SyncProfile* TableTicker::GetBacktrace()
|
|
{
|
|
SyncProfile* profile = NewSyncProfile();
|
|
|
|
TickSample sample;
|
|
sample.threadProfile = profile;
|
|
|
|
#if defined(HAVE_NATIVE_UNWIND)
|
|
#if defined(XP_WIN) || defined(LINUX)
|
|
tickcontext_t context;
|
|
sample.PopulateContext(&context);
|
|
#elif defined(XP_MACOSX)
|
|
sample.PopulateContext(nullptr);
|
|
#endif
|
|
#endif
|
|
|
|
sample.isSamplingCurrentThread = true;
|
|
sample.timestamp = mozilla::TimeStamp::Now();
|
|
|
|
if (!HasUnwinderThread()) {
|
|
profile->BeginUnwind();
|
|
}
|
|
|
|
Tick(&sample);
|
|
|
|
if (!HasUnwinderThread()) {
|
|
profile->EndUnwind();
|
|
}
|
|
|
|
return profile;
|
|
}
|
|
|
|
static void print_callback(const ProfileEntry& entry, const char* tagStringData)
|
|
{
|
|
switch (entry.getTagName()) {
|
|
case 's':
|
|
case 'c':
|
|
printf_stderr(" %s\n", tagStringData);
|
|
}
|
|
}
|
|
|
|
void mozilla_sampler_print_location1()
|
|
{
|
|
if (!stack_key_initialized)
|
|
profiler_init(nullptr);
|
|
|
|
SyncProfile* syncProfile = NewSyncProfile();
|
|
if (!syncProfile) {
|
|
return;
|
|
}
|
|
|
|
syncProfile->BeginUnwind();
|
|
doSampleStackTrace(syncProfile->GetPseudoStack(), *syncProfile, nullptr);
|
|
syncProfile->EndUnwind();
|
|
|
|
printf_stderr("Backtrace:\n");
|
|
syncProfile->IterateTags(print_callback);
|
|
delete syncProfile;
|
|
}
|
|
|
|
|