1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/tools/profiler/TableTicker.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,751 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#include <string>
1.10 +#include <stdio.h>
1.11 +#include <fstream>
1.12 +#include <sstream>
1.13 +#include "GeckoProfiler.h"
1.14 +#include "SaveProfileTask.h"
1.15 +#include "ProfileEntry.h"
1.16 +#include "SyncProfile.h"
1.17 +#include "platform.h"
1.18 +#include "nsThreadUtils.h"
1.19 +#include "prenv.h"
1.20 +#include "prtime.h"
1.21 +#include "shared-libraries.h"
1.22 +#include "mozilla/StackWalk.h"
1.23 +#include "TableTicker.h"
1.24 +#include "nsXULAppAPI.h"
1.25 +
1.26 +// JSON
1.27 +#include "JSStreamWriter.h"
1.28 +
1.29 +// Meta
1.30 +#include "nsXPCOM.h"
1.31 +#include "nsXPCOMCID.h"
1.32 +#include "nsIHttpProtocolHandler.h"
1.33 +#include "nsServiceManagerUtils.h"
1.34 +#include "nsIXULRuntime.h"
1.35 +#include "nsIXULAppInfo.h"
1.36 +#include "nsDirectoryServiceUtils.h"
1.37 +#include "nsDirectoryServiceDefs.h"
1.38 +#include "nsIObserverService.h"
1.39 +#include "mozilla/Services.h"
1.40 +#include "PlatformMacros.h"
1.41 +
1.42 +#if defined(SPS_OS_android) && !defined(MOZ_WIDGET_GONK)
1.43 + #include "AndroidBridge.h"
1.44 +#endif
1.45 +
1.46 +// JS
1.47 +#include "js/OldDebugAPI.h"
1.48 +
1.49 +#if defined(MOZ_PROFILING) && (defined(XP_MACOSX) || defined(XP_WIN))
1.50 + #define USE_NS_STACKWALK
1.51 +#endif
1.52 +#ifdef USE_NS_STACKWALK
1.53 + #include "nsStackWalk.h"
1.54 +#endif
1.55 +
1.56 +#if defined(XP_WIN)
1.57 +typedef CONTEXT tickcontext_t;
1.58 +#elif defined(LINUX)
1.59 +#include <ucontext.h>
1.60 +typedef ucontext_t tickcontext_t;
1.61 +#endif
1.62 +
1.63 +#if defined(LINUX) || defined(XP_MACOSX)
1.64 +#include <sys/types.h>
1.65 +pid_t gettid();
1.66 +#endif
1.67 +
1.68 +#if defined(SPS_ARCH_arm) && defined(MOZ_WIDGET_GONK)
1.69 + // Should also work on other Android and ARM Linux, but not tested there yet.
1.70 + #define USE_EHABI_STACKWALK
1.71 +#endif
1.72 +#ifdef USE_EHABI_STACKWALK
1.73 + #include "EHABIStackWalk.h"
1.74 +#endif
1.75 +
1.76 +using std::string;
1.77 +using namespace mozilla;
1.78 +
1.79 +#ifndef MAXPATHLEN
1.80 + #ifdef PATH_MAX
1.81 + #define MAXPATHLEN PATH_MAX
1.82 + #elif defined(MAX_PATH)
1.83 + #define MAXPATHLEN MAX_PATH
1.84 + #elif defined(_MAX_PATH)
1.85 + #define MAXPATHLEN _MAX_PATH
1.86 + #elif defined(CCHMAXPATH)
1.87 + #define MAXPATHLEN CCHMAXPATH
1.88 + #else
1.89 + #define MAXPATHLEN 1024
1.90 + #endif
1.91 +#endif
1.92 +
1.93 +///////////////////////////////////////////////////////////////////////
1.94 +// BEGIN SaveProfileTask et al
1.95 +
1.96 +std::string GetSharedLibraryInfoString();
1.97 +
1.98 +void TableTicker::HandleSaveRequest()
1.99 +{
1.100 + if (!mSaveRequested)
1.101 + return;
1.102 + mSaveRequested = false;
1.103 +
1.104 + // TODO: Use use the ipc/chromium Tasks here to support processes
1.105 + // without XPCOM.
1.106 + nsCOMPtr<nsIRunnable> runnable = new SaveProfileTask();
1.107 + NS_DispatchToMainThread(runnable);
1.108 +}
1.109 +
1.110 +void TableTicker::StreamMetaJSCustomObject(JSStreamWriter& b)
1.111 +{
1.112 + b.BeginObject();
1.113 +
1.114 + b.NameValue("version", 2);
1.115 + b.NameValue("interval", interval());
1.116 + b.NameValue("stackwalk", mUseStackWalk);
1.117 + b.NameValue("jank", mJankOnly);
1.118 + b.NameValue("processType", XRE_GetProcessType());
1.119 +
1.120 + TimeDuration delta = TimeStamp::Now() - sStartTime;
1.121 + b.NameValue("startTime", static_cast<float>(PR_Now()/1000.0 - delta.ToMilliseconds()));
1.122 +
1.123 + nsresult res;
1.124 + nsCOMPtr<nsIHttpProtocolHandler> http = do_GetService(NS_NETWORK_PROTOCOL_CONTRACTID_PREFIX "http", &res);
1.125 + if (!NS_FAILED(res)) {
1.126 + nsAutoCString string;
1.127 +
1.128 + res = http->GetPlatform(string);
1.129 + if (!NS_FAILED(res))
1.130 + b.NameValue("platform", string.Data());
1.131 +
1.132 + res = http->GetOscpu(string);
1.133 + if (!NS_FAILED(res))
1.134 + b.NameValue("oscpu", string.Data());
1.135 +
1.136 + res = http->GetMisc(string);
1.137 + if (!NS_FAILED(res))
1.138 + b.NameValue("misc", string.Data());
1.139 + }
1.140 +
1.141 + nsCOMPtr<nsIXULRuntime> runtime = do_GetService("@mozilla.org/xre/runtime;1");
1.142 + if (runtime) {
1.143 + nsAutoCString string;
1.144 +
1.145 + res = runtime->GetXPCOMABI(string);
1.146 + if (!NS_FAILED(res))
1.147 + b.NameValue("abi", string.Data());
1.148 +
1.149 + res = runtime->GetWidgetToolkit(string);
1.150 + if (!NS_FAILED(res))
1.151 + b.NameValue("toolkit", string.Data());
1.152 + }
1.153 +
1.154 + nsCOMPtr<nsIXULAppInfo> appInfo = do_GetService("@mozilla.org/xre/app-info;1");
1.155 + if (appInfo) {
1.156 + nsAutoCString string;
1.157 +
1.158 + res = appInfo->GetName(string);
1.159 + if (!NS_FAILED(res))
1.160 + b.NameValue("product", string.Data());
1.161 + }
1.162 +
1.163 + b.EndObject();
1.164 +}
1.165 +
1.166 +void TableTicker::ToStreamAsJSON(std::ostream& stream)
1.167 +{
1.168 + JSStreamWriter b(stream);
1.169 + StreamJSObject(b);
1.170 +}
1.171 +
1.172 +JSObject* TableTicker::ToJSObject(JSContext *aCx)
1.173 +{
1.174 + JS::RootedValue val(aCx);
1.175 + std::stringstream ss;
1.176 + {
1.177 + // Define a scope to prevent a moving GC during ~JSStreamWriter from
1.178 + // trashing the return value.
1.179 + JSStreamWriter b(ss);
1.180 + StreamJSObject(b);
1.181 + NS_ConvertUTF8toUTF16 js_string(nsDependentCString(ss.str().c_str()));
1.182 + JS_ParseJSON(aCx, static_cast<const jschar*>(js_string.get()), js_string.Length(), &val);
1.183 + }
1.184 + return &val.toObject();
1.185 +}
1.186 +
1.187 +struct SubprocessClosure {
1.188 + SubprocessClosure(JSStreamWriter *aWriter)
1.189 + : mWriter(aWriter)
1.190 + {}
1.191 +
1.192 + JSStreamWriter* mWriter;
1.193 +};
1.194 +
1.195 +void SubProcessCallback(const char* aProfile, void* aClosure)
1.196 +{
1.197 + // Called by the observer to get their profile data included
1.198 + // as a sub profile
1.199 + SubprocessClosure* closure = (SubprocessClosure*)aClosure;
1.200 +
1.201 + // Add the string profile into the profile
1.202 + closure->mWriter->Value(aProfile);
1.203 +}
1.204 +
1.205 +
1.206 +#if defined(SPS_OS_android) && !defined(MOZ_WIDGET_GONK)
1.207 +static
1.208 +void BuildJavaThreadJSObject(JSStreamWriter& b)
1.209 +{
1.210 + b.BeginObject();
1.211 +
1.212 + b.NameValue("name", "Java Main Thread");
1.213 +
1.214 + b.Name("samples");
1.215 + b.BeginArray();
1.216 +
1.217 + // for each sample
1.218 + for (int sampleId = 0; true; sampleId++) {
1.219 + bool firstRun = true;
1.220 + // for each frame
1.221 + for (int frameId = 0; true; frameId++) {
1.222 + nsCString result;
1.223 + bool hasFrame = AndroidBridge::Bridge()->GetFrameNameJavaProfiling(0, sampleId, frameId, result);
1.224 + // when we run out of frames, we stop looping
1.225 + if (!hasFrame) {
1.226 + // if we found at least one frame, we have objects to close
1.227 + if (!firstRun) {
1.228 + b.EndArray();
1.229 + b.EndObject();
1.230 + }
1.231 + break;
1.232 + }
1.233 + // the first time around, open the sample object and frames array
1.234 + if (firstRun) {
1.235 + firstRun = false;
1.236 +
1.237 + double sampleTime =
1.238 + mozilla::widget::android::GeckoJavaSampler::GetSampleTimeJavaProfiling(0, sampleId);
1.239 +
1.240 + b.BeginObject();
1.241 + b.NameValue("time", sampleTime);
1.242 +
1.243 + b.Name("frames");
1.244 + b.BeginArray();
1.245 + }
1.246 + // add a frame to the sample
1.247 + b.BeginObject();
1.248 + b.NameValue("location", result.BeginReading());
1.249 + b.EndObject();
1.250 + }
1.251 + // if we found no frames for this sample, we are done
1.252 + if (firstRun) {
1.253 + break;
1.254 + }
1.255 + }
1.256 +
1.257 + b.EndArray();
1.258 +
1.259 + b.EndObject();
1.260 +}
1.261 +#endif
1.262 +
1.263 +void TableTicker::StreamJSObject(JSStreamWriter& b)
1.264 +{
1.265 + b.BeginObject();
1.266 + // Put shared library info
1.267 + b.NameValue("libs", GetSharedLibraryInfoString().c_str());
1.268 +
1.269 + // Put meta data
1.270 + b.Name("meta");
1.271 + StreamMetaJSCustomObject(b);
1.272 +
1.273 + // Lists the samples for each ThreadProfile
1.274 + b.Name("threads");
1.275 + b.BeginArray();
1.276 +
1.277 + SetPaused(true);
1.278 +
1.279 + {
1.280 + mozilla::MutexAutoLock lock(*sRegisteredThreadsMutex);
1.281 +
1.282 + for (size_t i = 0; i < sRegisteredThreads->size(); i++) {
1.283 + // Thread not being profiled, skip it
1.284 + if (!sRegisteredThreads->at(i)->Profile())
1.285 + continue;
1.286 +
1.287 + MutexAutoLock lock(*sRegisteredThreads->at(i)->Profile()->GetMutex());
1.288 +
1.289 + sRegisteredThreads->at(i)->Profile()->StreamJSObject(b);
1.290 + }
1.291 + }
1.292 +
1.293 + if (Sampler::CanNotifyObservers()) {
1.294 + // Send a event asking any subprocesses (plugins) to
1.295 + // give us their information
1.296 + SubprocessClosure closure(&b);
1.297 + nsCOMPtr<nsIObserverService> os = mozilla::services::GetObserverService();
1.298 + if (os) {
1.299 + nsRefPtr<ProfileSaveEvent> pse = new ProfileSaveEvent(SubProcessCallback, &closure);
1.300 + os->NotifyObservers(pse, "profiler-subprocess", nullptr);
1.301 + }
1.302 + }
1.303 +
1.304 + #if defined(SPS_OS_android) && !defined(MOZ_WIDGET_GONK)
1.305 + if (ProfileJava()) {
1.306 + mozilla::widget::android::GeckoJavaSampler::PauseJavaProfiling();
1.307 +
1.308 + BuildJavaThreadJSObject(b);
1.309 +
1.310 + mozilla::widget::android::GeckoJavaSampler::UnpauseJavaProfiling();
1.311 + }
1.312 + #endif
1.313 +
1.314 + SetPaused(false);
1.315 + b.EndArray();
1.316 +
1.317 + b.EndObject();
1.318 +}
1.319 +
1.320 +// END SaveProfileTask et al
1.321 +////////////////////////////////////////////////////////////////////////
1.322 +
1.323 +static
1.324 +void addDynamicTag(ThreadProfile &aProfile, char aTagName, const char *aStr)
1.325 +{
1.326 + aProfile.addTag(ProfileEntry(aTagName, ""));
1.327 + // Add one to store the null termination
1.328 + size_t strLen = strlen(aStr) + 1;
1.329 + for (size_t j = 0; j < strLen;) {
1.330 + // Store as many characters in the void* as the platform allows
1.331 + char text[sizeof(void*)];
1.332 + size_t len = sizeof(void*)/sizeof(char);
1.333 + if (j+len >= strLen) {
1.334 + len = strLen - j;
1.335 + }
1.336 + memcpy(text, &aStr[j], len);
1.337 + j += sizeof(void*)/sizeof(char);
1.338 + // Cast to *((void**) to pass the text data to a void*
1.339 + aProfile.addTag(ProfileEntry('d', *((void**)(&text[0]))));
1.340 + }
1.341 +}
1.342 +
1.343 +static
1.344 +void addProfileEntry(volatile StackEntry &entry, ThreadProfile &aProfile,
1.345 + PseudoStack *stack, void *lastpc)
1.346 +{
1.347 + int lineno = -1;
1.348 +
1.349 + // First entry has tagName 's' (start)
1.350 + // Check for magic pointer bit 1 to indicate copy
1.351 + const char* sampleLabel = entry.label();
1.352 + if (entry.isCopyLabel()) {
1.353 + // Store the string using 1 or more 'd' (dynamic) tags
1.354 + // that will happen to the preceding tag
1.355 +
1.356 + addDynamicTag(aProfile, 'c', sampleLabel);
1.357 + if (entry.js()) {
1.358 + if (!entry.pc()) {
1.359 + // The JIT only allows the top-most entry to have a nullptr pc
1.360 + MOZ_ASSERT(&entry == &stack->mStack[stack->stackSize() - 1]);
1.361 + // If stack-walking was disabled, then that's just unfortunate
1.362 + if (lastpc) {
1.363 + jsbytecode *jspc = js::ProfilingGetPC(stack->mRuntime, entry.script(),
1.364 + lastpc);
1.365 + if (jspc) {
1.366 + lineno = JS_PCToLineNumber(nullptr, entry.script(), jspc);
1.367 + }
1.368 + }
1.369 + } else {
1.370 + lineno = JS_PCToLineNumber(nullptr, entry.script(), entry.pc());
1.371 + }
1.372 + } else {
1.373 + lineno = entry.line();
1.374 + }
1.375 + } else {
1.376 + aProfile.addTag(ProfileEntry('c', sampleLabel));
1.377 + lineno = entry.line();
1.378 + }
1.379 + if (lineno != -1) {
1.380 + aProfile.addTag(ProfileEntry('n', lineno));
1.381 + }
1.382 +}
1.383 +
1.384 +#if defined(USE_NS_STACKWALK) || defined(USE_EHABI_STACKWALK)
1.385 +typedef struct {
1.386 + void** array;
1.387 + void** sp_array;
1.388 + size_t size;
1.389 + size_t count;
1.390 +} PCArray;
1.391 +
1.392 +static void mergeNativeBacktrace(ThreadProfile &aProfile, const PCArray &array) {
1.393 + aProfile.addTag(ProfileEntry('s', "(root)"));
1.394 +
1.395 + PseudoStack* stack = aProfile.GetPseudoStack();
1.396 + uint32_t pseudoStackPos = 0;
1.397 +
1.398 + /* We have two stacks, the native C stack we extracted from unwinding,
1.399 + * and the pseudostack we managed during execution. We want to consolidate
1.400 + * the two in order. We do so by merging using the approximate stack address
1.401 + * when each entry was push. When pushing JS entry we may not now the stack
1.402 + * address in which case we have a nullptr stack address in which case we assume
1.403 + * that it follows immediatly the previous element.
1.404 + *
1.405 + * C Stack | Address -- Pseudo Stack | Address
1.406 + * main() | 0x100 run_js() | 0x40
1.407 + * start() | 0x80 jsCanvas() | nullptr
1.408 + * timer() | 0x50 drawLine() | nullptr
1.409 + * azure() | 0x10
1.410 + *
1.411 + * Merged: main(), start(), timer(), run_js(), jsCanvas(), drawLine(), azure()
1.412 + */
1.413 + // i is the index in C stack starting at main and decreasing
1.414 + // pseudoStackPos is the position in the Pseudo stack starting
1.415 + // at the first frame (run_js in the example) and increasing.
1.416 + for (size_t i = array.count; i > 0; --i) {
1.417 + while (pseudoStackPos < stack->stackSize()) {
1.418 + volatile StackEntry& entry = stack->mStack[pseudoStackPos];
1.419 +
1.420 + if (entry.stackAddress() < array.sp_array[i-1] && entry.stackAddress())
1.421 + break;
1.422 +
1.423 + addProfileEntry(entry, aProfile, stack, array.array[0]);
1.424 + pseudoStackPos++;
1.425 + }
1.426 +
1.427 + aProfile.addTag(ProfileEntry('l', (void*)array.array[i-1]));
1.428 + }
1.429 +}
1.430 +
1.431 +#endif
1.432 +
1.433 +#ifdef USE_NS_STACKWALK
1.434 +static
1.435 +void StackWalkCallback(void* aPC, void* aSP, void* aClosure)
1.436 +{
1.437 + PCArray* array = static_cast<PCArray*>(aClosure);
1.438 + MOZ_ASSERT(array->count < array->size);
1.439 + array->sp_array[array->count] = aSP;
1.440 + array->array[array->count] = aPC;
1.441 + array->count++;
1.442 +}
1.443 +
1.444 +void TableTicker::doNativeBacktrace(ThreadProfile &aProfile, TickSample* aSample)
1.445 +{
1.446 +#ifndef XP_MACOSX
1.447 + uintptr_t thread = GetThreadHandle(aSample->threadProfile->GetPlatformData());
1.448 + MOZ_ASSERT(thread);
1.449 +#endif
1.450 + void* pc_array[1000];
1.451 + void* sp_array[1000];
1.452 + PCArray array = {
1.453 + pc_array,
1.454 + sp_array,
1.455 + mozilla::ArrayLength(pc_array),
1.456 + 0
1.457 + };
1.458 +
1.459 + // Start with the current function.
1.460 + StackWalkCallback(aSample->pc, aSample->sp, &array);
1.461 +
1.462 + uint32_t maxFrames = uint32_t(array.size - array.count);
1.463 +#ifdef XP_MACOSX
1.464 + pthread_t pt = GetProfiledThread(aSample->threadProfile->GetPlatformData());
1.465 + void *stackEnd = reinterpret_cast<void*>(-1);
1.466 + if (pt)
1.467 + stackEnd = static_cast<char*>(pthread_get_stackaddr_np(pt));
1.468 + nsresult rv = NS_OK;
1.469 + if (aSample->fp >= aSample->sp && aSample->fp <= stackEnd)
1.470 + rv = FramePointerStackWalk(StackWalkCallback, /* skipFrames */ 0,
1.471 + maxFrames, &array,
1.472 + reinterpret_cast<void**>(aSample->fp), stackEnd);
1.473 +#else
1.474 + void *platformData = nullptr;
1.475 +#ifdef XP_WIN
1.476 + if (aSample->isSamplingCurrentThread) {
1.477 + // In this case we want NS_StackWalk to know that it's walking the
1.478 + // current thread's stack, so we pass 0 as the thread handle.
1.479 + thread = 0;
1.480 + }
1.481 + platformData = aSample->context;
1.482 +#endif // XP_WIN
1.483 +
1.484 + nsresult rv = NS_StackWalk(StackWalkCallback, /* skipFrames */ 0, maxFrames,
1.485 + &array, thread, platformData);
1.486 +#endif
1.487 + if (NS_SUCCEEDED(rv))
1.488 + mergeNativeBacktrace(aProfile, array);
1.489 +}
1.490 +#endif
1.491 +
1.492 +#ifdef USE_EHABI_STACKWALK
1.493 +void TableTicker::doNativeBacktrace(ThreadProfile &aProfile, TickSample* aSample)
1.494 +{
1.495 + void *pc_array[1000];
1.496 + void *sp_array[1000];
1.497 + PCArray array = {
1.498 + pc_array,
1.499 + sp_array,
1.500 + mozilla::ArrayLength(pc_array),
1.501 + 0
1.502 + };
1.503 +
1.504 + const mcontext_t *mcontext = &reinterpret_cast<ucontext_t *>(aSample->context)->uc_mcontext;
1.505 + mcontext_t savedContext;
1.506 + PseudoStack *pseudoStack = aProfile.GetPseudoStack();
1.507 +
1.508 + array.count = 0;
1.509 + // The pseudostack contains an "EnterJIT" frame whenever we enter
1.510 + // JIT code with profiling enabled; the stack pointer value points
1.511 + // the saved registers. We use this to unwind resume unwinding
1.512 + // after encounting JIT code.
1.513 + for (uint32_t i = pseudoStack->stackSize(); i > 0; --i) {
1.514 + // The pseudostack grows towards higher indices, so we iterate
1.515 + // backwards (from callee to caller).
1.516 + volatile StackEntry &entry = pseudoStack->mStack[i - 1];
1.517 + if (!entry.js() && strcmp(entry.label(), "EnterJIT") == 0) {
1.518 + // Found JIT entry frame. Unwind up to that point (i.e., force
1.519 + // the stack walk to stop before the block of saved registers;
1.520 + // note that it yields nondecreasing stack pointers), then restore
1.521 + // the saved state.
1.522 + uint32_t *vSP = reinterpret_cast<uint32_t*>(entry.stackAddress());
1.523 +
1.524 + array.count += EHABIStackWalk(*mcontext,
1.525 + /* stackBase = */ vSP,
1.526 + sp_array + array.count,
1.527 + pc_array + array.count,
1.528 + array.size - array.count);
1.529 +
1.530 + memset(&savedContext, 0, sizeof(savedContext));
1.531 + // See also: struct EnterJITStack in js/src/jit/arm/Trampoline-arm.cpp
1.532 + savedContext.arm_r4 = *vSP++;
1.533 + savedContext.arm_r5 = *vSP++;
1.534 + savedContext.arm_r6 = *vSP++;
1.535 + savedContext.arm_r7 = *vSP++;
1.536 + savedContext.arm_r8 = *vSP++;
1.537 + savedContext.arm_r9 = *vSP++;
1.538 + savedContext.arm_r10 = *vSP++;
1.539 + savedContext.arm_fp = *vSP++;
1.540 + savedContext.arm_lr = *vSP++;
1.541 + savedContext.arm_sp = reinterpret_cast<uint32_t>(vSP);
1.542 + savedContext.arm_pc = savedContext.arm_lr;
1.543 + mcontext = &savedContext;
1.544 + }
1.545 + }
1.546 +
1.547 + // Now unwind whatever's left (starting from either the last EnterJIT
1.548 + // frame or, if no EnterJIT was found, the original registers).
1.549 + array.count += EHABIStackWalk(*mcontext,
1.550 + aProfile.GetStackTop(),
1.551 + sp_array + array.count,
1.552 + pc_array + array.count,
1.553 + array.size - array.count);
1.554 +
1.555 + mergeNativeBacktrace(aProfile, array);
1.556 +}
1.557 +
1.558 +#endif
1.559 +
1.560 +static
1.561 +void doSampleStackTrace(PseudoStack *aStack, ThreadProfile &aProfile, TickSample *sample)
1.562 +{
1.563 + // Sample
1.564 + // 's' tag denotes the start of a sample block
1.565 + // followed by 0 or more 'c' tags.
1.566 + aProfile.addTag(ProfileEntry('s', "(root)"));
1.567 + for (uint32_t i = 0; i < aStack->stackSize(); i++) {
1.568 + addProfileEntry(aStack->mStack[i], aProfile, aStack, nullptr);
1.569 + }
1.570 +#ifdef ENABLE_SPS_LEAF_DATA
1.571 + if (sample) {
1.572 + aProfile.addTag(ProfileEntry('l', (void*)sample->pc));
1.573 +#ifdef ENABLE_ARM_LR_SAVING
1.574 + aProfile.addTag(ProfileEntry('L', (void*)sample->lr));
1.575 +#endif
1.576 + }
1.577 +#endif
1.578 +}
1.579 +
1.580 +void TableTicker::Tick(TickSample* sample)
1.581 +{
1.582 + if (HasUnwinderThread()) {
1.583 + UnwinderTick(sample);
1.584 + } else {
1.585 + InplaceTick(sample);
1.586 + }
1.587 +}
1.588 +
1.589 +void TableTicker::InplaceTick(TickSample* sample)
1.590 +{
1.591 + ThreadProfile& currThreadProfile = *sample->threadProfile;
1.592 +
1.593 + PseudoStack* stack = currThreadProfile.GetPseudoStack();
1.594 + bool recordSample = true;
1.595 +#if defined(XP_WIN)
1.596 + bool powerSample = false;
1.597 +#endif
1.598 +
1.599 + /* Don't process the PeudoStack's markers or honour jankOnly if we're
1.600 + immediately sampling the current thread. */
1.601 + if (!sample->isSamplingCurrentThread) {
1.602 + // Marker(s) come before the sample
1.603 + ProfilerMarkerLinkedList* pendingMarkersList = stack->getPendingMarkers();
1.604 + while (pendingMarkersList && pendingMarkersList->peek()) {
1.605 + ProfilerMarker* marker = pendingMarkersList->popHead();
1.606 + stack->addStoredMarker(marker);
1.607 + currThreadProfile.addTag(ProfileEntry('m', marker));
1.608 + }
1.609 + stack->updateGeneration(currThreadProfile.GetGenerationID());
1.610 +
1.611 +#if defined(XP_WIN)
1.612 + if (mProfilePower) {
1.613 + mIntelPowerGadget->TakeSample();
1.614 + powerSample = true;
1.615 + }
1.616 +#endif
1.617 +
1.618 + if (mJankOnly) {
1.619 + // if we are on a different event we can discard any temporary samples
1.620 + // we've kept around
1.621 + if (sLastSampledEventGeneration != sCurrentEventGeneration) {
1.622 + // XXX: we also probably want to add an entry to the profile to help
1.623 + // distinguish which samples are part of the same event. That, or record
1.624 + // the event generation in each sample
1.625 + currThreadProfile.erase();
1.626 + }
1.627 + sLastSampledEventGeneration = sCurrentEventGeneration;
1.628 +
1.629 + recordSample = false;
1.630 + // only record the events when we have a we haven't seen a tracer event for 100ms
1.631 + if (!sLastTracerEvent.IsNull()) {
1.632 + TimeDuration delta = sample->timestamp - sLastTracerEvent;
1.633 + if (delta.ToMilliseconds() > 100.0) {
1.634 + recordSample = true;
1.635 + }
1.636 + }
1.637 + }
1.638 + }
1.639 +
1.640 +#if defined(USE_NS_STACKWALK) || defined(USE_EHABI_STACKWALK)
1.641 + if (mUseStackWalk) {
1.642 + doNativeBacktrace(currThreadProfile, sample);
1.643 + } else {
1.644 + doSampleStackTrace(stack, currThreadProfile, mAddLeafAddresses ? sample : nullptr);
1.645 + }
1.646 +#else
1.647 + doSampleStackTrace(stack, currThreadProfile, mAddLeafAddresses ? sample : nullptr);
1.648 +#endif
1.649 +
1.650 + if (recordSample)
1.651 + currThreadProfile.flush();
1.652 +
1.653 + if (!sLastTracerEvent.IsNull() && sample && currThreadProfile.IsMainThread()) {
1.654 + TimeDuration delta = sample->timestamp - sLastTracerEvent;
1.655 + currThreadProfile.addTag(ProfileEntry('r', static_cast<float>(delta.ToMilliseconds())));
1.656 + }
1.657 +
1.658 + if (sample) {
1.659 + TimeDuration delta = sample->timestamp - sStartTime;
1.660 + currThreadProfile.addTag(ProfileEntry('t', static_cast<float>(delta.ToMilliseconds())));
1.661 + }
1.662 +
1.663 +#if defined(XP_WIN)
1.664 + if (powerSample) {
1.665 + currThreadProfile.addTag(ProfileEntry('p', static_cast<float>(mIntelPowerGadget->GetTotalPackagePowerInWatts())));
1.666 + }
1.667 +#endif
1.668 +
1.669 + if (sLastFrameNumber != sFrameNumber) {
1.670 + currThreadProfile.addTag(ProfileEntry('f', sFrameNumber));
1.671 + sLastFrameNumber = sFrameNumber;
1.672 + }
1.673 +}
1.674 +
1.675 +namespace {
1.676 +
1.677 +SyncProfile* NewSyncProfile()
1.678 +{
1.679 + PseudoStack* stack = tlsPseudoStack.get();
1.680 + if (!stack) {
1.681 + MOZ_ASSERT(stack);
1.682 + return nullptr;
1.683 + }
1.684 + Thread::tid_t tid = Thread::GetCurrentId();
1.685 +
1.686 + SyncProfile* profile = new SyncProfile("SyncProfile",
1.687 + GET_BACKTRACE_DEFAULT_ENTRY,
1.688 + stack, tid, NS_IsMainThread());
1.689 + return profile;
1.690 +}
1.691 +
1.692 +} // anonymous namespace
1.693 +
1.694 +SyncProfile* TableTicker::GetBacktrace()
1.695 +{
1.696 + SyncProfile* profile = NewSyncProfile();
1.697 +
1.698 + TickSample sample;
1.699 + sample.threadProfile = profile;
1.700 +
1.701 +#if defined(HAVE_NATIVE_UNWIND)
1.702 +#if defined(XP_WIN) || defined(LINUX)
1.703 + tickcontext_t context;
1.704 + sample.PopulateContext(&context);
1.705 +#elif defined(XP_MACOSX)
1.706 + sample.PopulateContext(nullptr);
1.707 +#endif
1.708 +#endif
1.709 +
1.710 + sample.isSamplingCurrentThread = true;
1.711 + sample.timestamp = mozilla::TimeStamp::Now();
1.712 +
1.713 + if (!HasUnwinderThread()) {
1.714 + profile->BeginUnwind();
1.715 + }
1.716 +
1.717 + Tick(&sample);
1.718 +
1.719 + if (!HasUnwinderThread()) {
1.720 + profile->EndUnwind();
1.721 + }
1.722 +
1.723 + return profile;
1.724 +}
1.725 +
1.726 +static void print_callback(const ProfileEntry& entry, const char* tagStringData)
1.727 +{
1.728 + switch (entry.getTagName()) {
1.729 + case 's':
1.730 + case 'c':
1.731 + printf_stderr(" %s\n", tagStringData);
1.732 + }
1.733 +}
1.734 +
1.735 +void mozilla_sampler_print_location1()
1.736 +{
1.737 + if (!stack_key_initialized)
1.738 + profiler_init(nullptr);
1.739 +
1.740 + SyncProfile* syncProfile = NewSyncProfile();
1.741 + if (!syncProfile) {
1.742 + return;
1.743 + }
1.744 +
1.745 + syncProfile->BeginUnwind();
1.746 + doSampleStackTrace(syncProfile->GetPseudoStack(), *syncProfile, nullptr);
1.747 + syncProfile->EndUnwind();
1.748 +
1.749 + printf_stderr("Backtrace:\n");
1.750 + syncProfile->IterateTags(print_callback);
1.751 + delete syncProfile;
1.752 +}
1.753 +
1.754 +
