The Tor Browser: tools/profiler/nsProfiler.cpp@b8a032363ba2 (annotated)

tools/profiler/nsProfiler.cpp@b8a032363ba2 (annotated)

tools/profiler/nsProfiler.cpp

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
 /* 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 <string>
 #include <sstream>
 #ifdef MOZ_INSTRUMENT_EVENT_LOOP
 #include "EventTracer.h"
 #endif
 #include "GeckoProfiler.h"
 #include "nsProfiler.h"
 #include "nsMemory.h"
 #include "nsString.h"
 #include "mozilla/Services.h"
 #include "nsIObserverService.h"
 #include "nsIInterfaceRequestor.h"
 #include "nsILoadContext.h"
 #include "nsIWebNavigation.h"
 #include "nsIInterfaceRequestorUtils.h"
 #include "shared-libraries.h"
 #include "js/Value.h"
 using std::string;
 NS_IMPL_ISUPPORTS(nsProfiler, nsIProfiler)
 nsProfiler::nsProfiler()
   : mLockedForPrivateBrowsing(false)
 {
 }
 nsProfiler::~nsProfiler()
 {
   nsCOMPtr<nsIObserverService> observerService = mozilla::services::GetObserverService();
   if (observerService) {
     observerService->RemoveObserver(this, "chrome-document-global-created");
     observerService->RemoveObserver(this, "last-pb-context-exited");
   }
 }
 nsresult
 nsProfiler::Init() {
   nsCOMPtr<nsIObserverService> observerService = mozilla::services::GetObserverService();
   if (observerService) {
     observerService->AddObserver(this, "chrome-document-global-created", false);
     observerService->AddObserver(this, "last-pb-context-exited", false);
   }
   return NS_OK;
 }
 NS_IMETHODIMP
 nsProfiler::Observe(nsISupports *aSubject,
                     const char *aTopic,
                     const char16_t *aData)
 {
   if (strcmp(aTopic, "chrome-document-global-created") == 0) {
     nsCOMPtr<nsIInterfaceRequestor> requestor = do_QueryInterface(aSubject);
     nsCOMPtr<nsIWebNavigation> parentWebNav = do_GetInterface(requestor);
     nsCOMPtr<nsILoadContext> loadContext = do_QueryInterface(parentWebNav);
     if (loadContext && loadContext->UsePrivateBrowsing() && !mLockedForPrivateBrowsing) {
       mLockedForPrivateBrowsing = true;
       profiler_lock();
     }
   } else if (strcmp(aTopic, "last-pb-context-exited") == 0) {
     mLockedForPrivateBrowsing = false;
     profiler_unlock();
   }
   return NS_OK;
 }
 NS_IMETHODIMP
 nsProfiler::StartProfiler(uint32_t aEntries, double aInterval,
                           const char** aFeatures, uint32_t aFeatureCount,
                           const char** aThreadNameFilters, uint32_t aFilterCount)
 {
   if (mLockedForPrivateBrowsing) {
     return NS_ERROR_NOT_AVAILABLE;
   }
   profiler_start(aEntries, aInterval,
                  aFeatures, aFeatureCount,
                  aThreadNameFilters, aFilterCount);
 #ifdef MOZ_INSTRUMENT_EVENT_LOOP
   bool printToConsole = false;
   mozilla::InitEventTracing(printToConsole);
 #endif
   return NS_OK;
 }
 NS_IMETHODIMP
 nsProfiler::StopProfiler()
 {
   profiler_stop();
   return NS_OK;
 }
 NS_IMETHODIMP
 nsProfiler::IsPaused(bool *aIsPaused)
 {
   *aIsPaused = profiler_is_paused();
   return NS_OK;
 }
 NS_IMETHODIMP
 nsProfiler::PauseSampling()
 {
   profiler_pause();
   return NS_OK;
 }
 NS_IMETHODIMP
 nsProfiler::ResumeSampling()
 {
   profiler_resume();
   return NS_OK;
 }
 NS_IMETHODIMP
 nsProfiler::AddMarker(const char *aMarker)
 {
   PROFILER_MARKER(aMarker);
   return NS_OK;
 }
 NS_IMETHODIMP
 nsProfiler::GetProfile(char **aProfile)
 {
   char *profile = profiler_get_profile();
   if (profile) {
     size_t len = strlen(profile);
     char *profileStr = static_cast<char *>
                          (nsMemory::Clone(profile, (len + 1) * sizeof(char)));
     profileStr[len] = '\0';
     *aProfile = profileStr;
     free(profile);
   }
   return NS_OK;
 }
 static void
 AddSharedLibraryInfoToStream(std::ostream& aStream, const SharedLibrary& aLib)
 {
   aStream << "{";
   aStream << "\"start\":" << aLib.GetStart();
   aStream << ",\"end\":" << aLib.GetEnd();
   aStream << ",\"offset\":" << aLib.GetOffset();
   aStream << ",\"name\":\"" << aLib.GetName() << "\"";
   const std::string &breakpadId = aLib.GetBreakpadId();
   aStream << ",\"breakpadId\":\"" << breakpadId << "\"";
 #ifdef XP_WIN
   // FIXME: remove this XP_WIN code when the profiler plugin has switched to
   // using breakpadId.
   std::string pdbSignature = breakpadId.substr(0, 32);
   std::string pdbAgeStr = breakpadId.substr(32,  breakpadId.size() - 1);
   std::stringstream stream;
   stream << pdbAgeStr;
   unsigned pdbAge;
   stream << std::hex;
   stream >> pdbAge;
 #ifdef DEBUG
   std::ostringstream oStream;
   oStream << pdbSignature << std::hex << std::uppercase << pdbAge;
   MOZ_ASSERT(breakpadId == oStream.str());
 #endif
   aStream << ",\"pdbSignature\":\"" << pdbSignature << "\"";
   aStream << ",\"pdbAge\":" << pdbAge;
   aStream << ",\"pdbName\":\"" << aLib.GetName() << "\"";
 #endif
   aStream << "}";
 }
 std::string
 GetSharedLibraryInfoString()
 {
   SharedLibraryInfo info = SharedLibraryInfo::GetInfoForSelf();
   if (info.GetSize() == 0)
     return "[]";
   std::ostringstream os;
   os << "[";
   AddSharedLibraryInfoToStream(os, info.GetEntry(0));
   for (size_t i = 1; i < info.GetSize(); i++) {
     os << ",";
     AddSharedLibraryInfoToStream(os, info.GetEntry(i));
   }
   os << "]";
   return os.str();
 }
 NS_IMETHODIMP
 nsProfiler::GetSharedLibraryInformation(nsAString& aOutString)
 {
   aOutString.Assign(NS_ConvertUTF8toUTF16(GetSharedLibraryInfoString().c_str()));
   return NS_OK;
 }
 NS_IMETHODIMP nsProfiler::GetProfileData(JSContext* aCx,
                                          JS::MutableHandle<JS::Value> aResult)
 {
   JS::RootedObject obj(aCx, profiler_get_profile_jsobject(aCx));
   if (!obj) {
     return NS_ERROR_FAILURE;
   }
   aResult.setObject(*obj);
   return NS_OK;
 }
 NS_IMETHODIMP
 nsProfiler::IsActive(bool *aIsActive)
 {
   *aIsActive = profiler_is_active();
   return NS_OK;
 }
 NS_IMETHODIMP
 nsProfiler::GetResponsivenessTimes(uint32_t *aCount, double **aResult)
 {
   unsigned int len = 100;
   const double* times = profiler_get_responsiveness();
   if (!times) {
     *aCount = 0;
     *aResult = nullptr;
     return NS_OK;
   }
   double *fs = static_cast<double *>
                        (nsMemory::Clone(times, len * sizeof(double)));
   *aCount = len;
   *aResult = fs;
   return NS_OK;
 }
 NS_IMETHODIMP
 nsProfiler::GetFeatures(uint32_t *aCount, char ***aFeatures)
 {
   uint32_t len = 0;
   const char **features = profiler_get_features();
   if (!features) {
     *aCount = 0;
     *aFeatures = nullptr;
     return NS_OK;
   }
   while (features[len]) {
     len++;
   }
   char **featureList = static_cast<char **>
                        (nsMemory::Alloc(len * sizeof(char*)));
   for (size_t i = 0; i < len; i++) {
     size_t strLen = strlen(features[i]);
     featureList[i] = static_cast<char *>
                          (nsMemory::Clone(features[i], (strLen + 1) * sizeof(char)));
   }
   *aFeatures = featureList;
   *aCount = len;
   return NS_OK;
 }

The Tor Browser / annotate

tools/profiler/nsProfiler.cpp@b8a032363ba2 (annotated)

tools/profiler/nsProfiler.cpp