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[tor-commits] [Git][tpo/applications/tor-browser][tor-browser-102.12.0esr-12.0-1] Bug 1832832 - protect encoder accesses in Java callbacks. r=media-playback-reviewers, alwu a=pascalc

Title: GitLab

richard pushed to branch tor-browser-102.12.0esr-12.0-1 at The Tor Project / Applications / Tor Browser

Commits:

  • d661761c
    by John Lin at 2023-06-06T16:34:36+00:00 
    Bug 1832832 - protect encoder accesses in Java callbacks. r=media-playback-reviewers,alwu a=pascalc

Differential Revision: https://phabricator.services.mozilla.com/D178564

2 changed files:

Changes:

  • dom/media/platforms/android/AndroidDataEncoder.cpp
    ... ... @@ -494,7 +494,10 @@ void AndroidDataEncoder<ConfigType>::CallbacksSupport::HandleInput(
    494 494 
     template <typename ConfigType>
    495 495 
     void AndroidDataEncoder<ConfigType>::CallbacksSupport::HandleOutput(
    496 496 
         java::Sample::Param aSample, java::SampleBuffer::Param aBuffer) {
    497 
    -  mEncoder->ProcessOutput(std::move(aSample), std::move(aBuffer));
    497 
    +  MutexAutoLock lock(mMutex);
    498 
    +  if (mEncoder) {
    499 
    +    mEncoder->ProcessOutput(std::move(aSample), std::move(aBuffer));
    500 
    +  }
    498 501 
     }
    499 502
    500 503 
     template <typename ConfigType>
    ... ... @@ -504,7 +507,10 @@ void AndroidDataEncoder<ConfigType>::CallbacksSupport::
    504 507 
     template <typename ConfigType>
    505 508 
     void AndroidDataEncoder<ConfigType>::CallbacksSupport::HandleError(
    506 509 
         const MediaResult& aError) {
    507 
    -  mEncoder->Error(aError);
    510 
    +  MutexAutoLock lock(mMutex);
    511 
    +  if (mEncoder) {
    512 
    +    mEncoder->Error(aError);
    513 
    +  }
    508 514 
     }
    509 515
    510 516 
     // Force compiler to generate code.

  • dom/media/platforms/android/AndroidDataEncoder.h
    ... ... @@ -13,6 +13,7 @@
    13 13
    14 14 
     #include "mozilla/Maybe.h"
    15 15 
     #include "mozilla/Monitor.h"
    16 
    +#include "mozilla/Mutex.h"
    16 17
    17 18 
     namespace mozilla {
    18 19
    ... ... @@ -36,7 +37,15 @@ class AndroidDataEncoder final : public MediaDataEncoder {
    36 37 
       class CallbacksSupport final : public JavaCallbacksSupport {
    37 38 
        public:
    38 39 
         explicit CallbacksSupport(AndroidDataEncoder* aEncoder)
    39 
    -        : mEncoder(aEncoder) {}
    40 
    +        : mMutex("AndroidDataEncoder::CallbacksSupport") {
    41 
    +      MutexAutoLock lock(mMutex);
    42 
    +      mEncoder = aEncoder;
    43 
    +    }
    44 
    +
    45 
    +    ~CallbacksSupport() {
    46 
    +      MutexAutoLock lock(mMutex);
    47 
    +      mEncoder = nullptr;
    48 
    +    }
    40 49
    41 50 
         void HandleInput(int64_t aTimestamp, bool aProcessed) override;
    42 51 
         void HandleOutput(java::Sample::Param aSample,
    ... ... @@ -46,7 +55,8 @@ class AndroidDataEncoder final : public MediaDataEncoder {
    46 55 
         void HandleError(const MediaResult& aError) override;
    47 56
    48 57 
        private:
    49 
    -    AndroidDataEncoder* mEncoder;
    58 
    +    Mutex mMutex;
    59 
    +    AndroidDataEncoder* mEncoder MOZ_GUARDED_BY(mMutex);
    50 60 
       };
    51 61 
       friend class CallbacksSupport;
    52 62

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