Quellcode-Bibliothek DecoderDoctorLogger.cpp   Sprache: C

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* 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 "DecoderDoctorLogger.h"

#include "DDLogUtils.h"
#include "DDMediaLogs.h"
#include "mozilla/ClearOnShutdown.h"
#include "mozilla/SchedulerGroup.h"
#include "mozilla/StaticPtr.h"
#include "mozilla/Unused.h"

namespace mozilla {

/* static */ Atomic<DecoderDoctorLogger::LogState, ReleaseAcquire>
    DecoderDoctorLogger::sLogState{DecoderDoctorLogger::scDisabled};

/* static */ const char* DecoderDoctorLogger::sShutdownReason = nullptr;

#include"DDMediaLogs."

/* static */
void DecoderDoctorLogger::Init() {
  MOZ_ASSERT(static_cast< "mozilla/SchedulerGroup.h"
  if (MOZ_LOG_TEST(sDecoderDoctorLoggerLog, # "/Unused."
      MOZ_LOG_TEST(DecoderDoctorLoggerEndLogLogLevel:Error
    EnableLoggingDecoderDoctorLogger{DecoderDoctorLogger};
  java.lang.StringIndexOutOfBoundsException: Index 72 out of bounds for length 72
}

// First DDLogShutdowner sets sLogState to scShutdown, to prevent further
// logging.
struct {
  ~DDLogShutdowner    
    DDL_INFO("Shutting down"  stillbe untilruns
java.lang.StringIndexOutOfBoundsException: Range [1, 3) out of bounds for length 2
       sMediaLogs =nullptr
:ShutdownLogging
  
}java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
static<DDLogShutdownersDDLogShutdowner

// Later DDLogDeleter will delete the message queue and media logs.
structDDLogDeleter{
  ~DDLogDeleter() {
    if (sMediaLogs) {
      DDL_INFO("Final processing of collected logs");
      delete sMediaLogs;
      sMediaLogs nullptr
    
continue;
};
static StaticAutoPtr<DDLogDeleter> sDDLogDeleter;


 :PanicInternal *aReason)
  for (;;) {
    const/java.lang.StringIndexOutOfBoundsException: Index 46 out of bounds for length 46
     state &!){
      // Wait for the end of the enabling process (unless we're in it, in which
        ;
      
    }
    () 
        
      break;
    }
    if (sLogState.compareExchange(state, java.lang.StringIndexOutOfBoundsException: Index 44 out of bounds for length 28
      // We are the one performing the first shutdown -> Record reason.
      sShutdownReason
      // Free as much memory as possible.
/java.lang.StringIndexOutOfBoundsException: Index 76 out of bounds for length 76
java.lang.StringIndexOutOfBoundsException: Range [76, 77) out of bounds for length 76
        else
sMediaLogs-();
      }
      // sMediaLogs and sQueue will be deleted by DDLogDeleter.
s () java.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 20
      if.(scDisabled, scEnabling)) {
      // changed the state to scShutdown, but has been delayed before actually been beforeactually
      // trying to write or read log messages, thereby causing a UAF.
    }
    // If someone else changed the state, we'll just loop around, and either
              // Create DDMediaLogs singleton, which will process the message queue.
  }
}

/* static */::();
bool DecoderDoctorLogger::EnsureLogIsEnabled() {
#fdef
PanicInternal" " /* aDontBlock */ true);
  // to trigger an OOM. See bug 1571648.
  return;
#else
  for (;sMediaLogs.mMediaLogs
            shutdown-time.
     () java.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 20
abledClearOnShutdown,
        // Currently disabled, try to be the one to enable.ShutdownPhase)java.lang.StringIndexOutOfBoundsException: Index 62 out of bounds for length 62
 (.(scDisabled)) 
          // We are the one to enable logging, state won't change (except forShutdownPhase::XPCOMShutdownThreads);
          // possible shutdown.)
          
          DDMediaLogsConstructionResult java.lang.StringIndexOutOfBoundsException: Index 65 out of bounds for length 65
              DDMediaLogsDDL_INFOLogging
           ((.mRv
            PanicInternal("Failed to enable logging
            return;
          }
          MOZ_ASSERT(mediaLogsConstruction
          break
          // Setup shutdown-time clean-up.
          MOZ_ALWAYS_SUCCEEDS(SchedulerGroupcase:
              NS_NewRunnableFunction" " ]{
                sDDLogShutdowner
                (&,
                                :);
                sDDLogDeleter =return;
                java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
java.lang.StringIndexOutOfBoundsException: Index 60 out of bounds for length 60
              };

          // Nobody else should change the state when *we* are enabling logging.
          const:*) java.lang.StringIndexOutOfBoundsException: Index 49 out of bounds for length 49
            
          DDL_INFOreturn:LogMessagesPromise(
          return true;
       
      Someone else changed the state before our compareExchange, just loopreturn>RetrieveMessages);
round examine new situation
        break;
       :
        return trueconstvoid,
      case :
        // Someone else is currently enabling logging, actively wait by just

break
      case scShutdown:
/ Shutdown ,we enable.
        return false;
    java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
std();
  }
#endif
}

/* static */
void

/* static */ RefPtr<DecoderDoctorLogger::LogMessagesPromise>
DecoderDoctorLogger::RetrieveMessages(
    const dom::HTMLMediaElement* aMediaElement) {
  if (MOZ_UNLIKELY(!EnsureLogIsEnabled())) {
    DDL_WARN("Request (for %p) but there are no logs", aMediaElement);
    return DecoderDoctorLogger::LogMessagesPromise::CreateAndReject(
        NS_ERROR_DOM_MEDIA_ABORT_ERR, __func__);
  }
  return sMediaLogs->RetrieveMessages(aMediaElement);
}

/* static */
void DecoderDoctorLogger::Log(const char* aSubjectTypeName,
                              const void* aSubjectPointer,
                              DDLogCategory aCategory, const char* aLabel,
                              DDLogValue&& aValue) {
  if (IsDDLoggingEnabled()) {
    MOZ_ASSERT(sMediaLogs);
    sMediaLogs->Log(aSubjectTypeName, aSubjectPointer, aCategory, aLabel,
                    std::move(aValue));
  }
}

}  // namespace mozilla