Nvidia TX1 開発キットの SurfaceTexture にストリーミング オーディオおよびビデオ データをデコードするために、いくつかの MediaCodec インスタンスをインスタンス化するアプリに取り組んでいます。1 つのオーディオ デコーダーと 1 つのビデオ デコーダーを数分間使用しただけで、弱いグローバル参照テーブルのオーバーフローに関するエラーが表示されます。
A/art: art/runtime/indirect_reference_table.cc:118] JNI ERROR (app bug): weak global reference table overflow (max=51200 holes= 0 sizecheck=51200)
A/art: art/runtime/indirect_reference_table.cc:118] weak global reference table dump:
A/art: art/runtime/indirect_reference_table.cc:118] Last 100 entries (of 51200):
A/art: art/runtime/indirect_reference_table.cc:118] 51199: 0x12c00460 java.lang.Thread
A/art: art/runtime/indirect_reference_table.cc:118] 51198: 0x12c00400 java.lang.Thread
A/art: art/runtime/indirect_reference_table.cc:118] 51197: 0x12c003a0 java.lang.Thread
A/art: art/runtime/indirect_reference_table.cc:118] 51196: 0x12c00340 java.lang.Thread
A/art: art/runtime/indirect_reference_table.cc:118] 51195: 0x12c002e0 java.lang.Thread
A/art: art/runtime/indirect_reference_table.cc:118] 51194: 0x12c00280 java.lang.Thread
A/art: art/runtime/indirect_reference_table.cc:118] 51193: 0x12c001c0 java.lang.Thread
A/art: art/runtime/indirect_reference_table.cc:118] 51192: 0x12c009a0 java.lang.Thread
A/art: art/runtime/indirect_reference_table.cc:118] 51191: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51190: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51189: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51188: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51187: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51186: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51185: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51184: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51183: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51182: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51181: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51180: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51179: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51178: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51177: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51176: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51175: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51174: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51173: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51172: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51171: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51170: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51169: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51168: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51167: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51166: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51165: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51164: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51163: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51162: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51161: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51160: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51159: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51158: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51157: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51156: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51155: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51154: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51153: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51152: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51151: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51150: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51149: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51148: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51147: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51146: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51145: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51144: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51143: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51142: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51141: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51140: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51139: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51138: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51137: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51136: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51135: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51134: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51133: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51132: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51131: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51130: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51129: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51128: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51127: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51126: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51125: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51124: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51123: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51122: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51121: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51120: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51119: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51118: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51117: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51116: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51115: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51114: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51113: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51112: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51111: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51110: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51109: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51108: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51107: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51106: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51105: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51104: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51103: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51102: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51101: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] 51100: cleared jweak
A/art: art/runtime/indirect_reference_table.cc:118] Summary:
A/art: art/runtime/indirect_reference_table.cc:118] 6497 of java.lang.Class (6497 unique instances)
A/art: art/runtime/indirect_reference_table.cc:118] 1 of java.lang.ThreadGroup
A/art: art/runtime/indirect_reference_table.cc:118] 2 of byte[] (100 elements) (2 unique instances)
A/art: art/runtime/indirect_reference_table.cc:118] 4 of byte[] (576 elements) (4 unique instances)
A/art: art/runtime/indirect_reference_table.cc:118] 5 of byte[] (18432 elements) (5 unique instances)
A/art: art/runtime/indirect_reference_table.cc:118] 1 of byte[] (36608 elements)
A/art: art/runtime/indirect_reference_table.cc:118] 18 of java.lang.Thread (18 unique instances)
A/art: art/runtime/indirect_reference_table.cc:118] 1 of android.media.MediaCodec
A/art: art/runtime/indirect_reference_table.cc:118]
Android イメージを再コンパイルできるので、表示されるエントリのリストを 10 から 100 に拡張しました。
記録のために、私は自分のコードで弱い参照を使用していません。また、アプリで直接 JNI を使用していません。
これは私のコードの下にある何かのバグのようです。アプリがクラッシュすると、JNISurfaceTexture スレッドで発生します。どうやらスレッドをスリープ状態にすると、このテーブルに別のエントリが作成されます。これは、ランタイムの背中を壊すストローのようです。
ほとんどのエントリは「cleared jweak」であるように見えます。これは、実際には使用されていないことを示しています。要約情報も、表にあると思われる 51200 エントリに近いところまで加算されません。
弱いグローバル参照を追跡し、スタック トレースを取得しました。
D/StackDump: #00 pc 00000000002758c0 /system/lib64/libart.so (art::IndirectReferenceTable::Add(unsigned int, art::mirror::Object*)+300)
D/StackDump: #01 pc 000000000030c9c0 /system/lib64/libart.so (art::JavaVMExt::AddWeakGlobalRef(art::Thread*, art::mirror::Object*)+68)
D/StackDump: #02 pc 00000000003616cc /system/lib64/libart.so (art::JNI::NewWeakGlobalRef(_JNIEnv*, _jobject*)+320)
D/StackDump: #03 pc 0000000000152530 /system/lib64/libart.so (art::CheckJNI::NewRef(char const*, _JNIEnv*, _jobject*, art::IndirectRefKind)+704)
D/StackDump: #04 pc 0000000000327ad0 /system/lib64/libart.so (unsigned long art::ObjectRegistry::InternalAdd<art::mirror::Object>(art::Handle<art::mirror::Object>)+880)
D/StackDump: #05 pc 0000000000327dd0 /system/lib64/libart.so (art::ObjectRegistry::Add(art::mirror::Object*)+128)
D/StackDump: #06 pc 00000000001aec5c /system/lib64/libart.so (art::Dbg::GetThreadId(art::Thread*)+364)
D/StackDump: #07 pc 0000000000317268 /system/lib64/libart.so (art::JDWP::JdwpState::PostThreadChange(art::Thread*, bool)+696)
D/StackDump: #08 pc 00000000001b5a44 /system/lib64/libart.so (art::Dbg::PostThreadStart(art::Thread*)+44)
D/StackDump: #09 pc 000000000045f6d4 /system/lib64/libart.so (art::Thread::Attach(char const*, bool, _jobject*, bool)+744)
D/StackDump: #10 pc 0000000000433440 /system/lib64/libart.so (art::Runtime::AttachCurrentThread(char const*, bool, _jobject*, bool)+24)
D/StackDump: #11 pc 000000000030d6a4 /system/lib64/libart.so (art::JII::AttachCurrentThread(_JavaVM*, _JNIEnv**, void*)+208)
D/StackDump: #12 pc 00000000001471bc /system/lib64/libart.so (art::CheckJII::AttachCurrentThread(_JavaVM*, _JNIEnv**, void*)+124)
D/StackDump: #13 pc 00000000000fcd3c /system/lib64/libandroid_runtime.so (android::JNISurfaceTextureContext::getJNIEnv(bool*)+112)
D/StackDump: #14 pc 00000000000fced0 /system/lib64/libandroid_runtime.so (android::JNISurfaceTextureContext::onFrameAvailable(android::BufferItem const&)+28)
D/StackDump: #15 pc 000000000005cfb8 /system/lib64/libgui.so (android::ConsumerBase::onFrameAvailable(android::BufferItem const&)+212)
D/StackDump: #16 pc 00000000000528c0 /system/lib64/libgui.so (android::BufferQueue::ProxyConsumerListener::onFrameAvailable(android::BufferItem const&)+84)
D/StackDump: #17 pc 000000000005a440 /system/lib64/libgui.so (android::BufferQueueProducer::queueBuffer(int, android::IGraphicBufferProducer::QueueBufferInput const&, android::IGraphicBufferProducer::QueueBufferOutput*)+2440)
D/StackDump: #18 pc 00000000000730ac /system/lib64/libgui.so (android::Surface::queueBuffer(ANativeWindowBuffer*, int)+892)
D/StackDump: #19 pc 000000000009a818 /system/lib64/libstagefright.so (android::ACodec::BaseState::onOutputBufferDrained(android::sp<android::AMessage> const&)+892)
D/StackDump: #20 pc 00000000000987bc /system/lib64/libstagefright.so (android::ACodec::BaseState::onMessageReceived(android::sp<android::AMessage> const&)+908)
D/StackDump: #21 pc 000000000000dc08 /system/lib64/libstagefright_foundation.so (android::AHierarchicalStateMachine::handleMessage(android::sp<android::AMessage> const&)+124)
D/StackDump: #22 pc 000000000000d998 /system/lib64/libstagefright_foundation.so (android::AHandler::deliverMessage(android::sp<android::AMessage> const&)+32)
D/StackDump: #23 pc 00000000000114c8 /system/lib64/libstagefright_foundation.so (android::AMessage::deliver()+92)
D/StackDump: #24 pc 000000000000ea0c /system/lib64/libstagefright_foundation.so (android::ALooper::loop()+404)
D/StackDump: #25 pc 0000000000015bf8 /system/lib64/libutils.so (android::Thread::_threadLoop(void*)+208)
D/StackDump: #26 pc 0000000000015448 /system/lib64/libutils.so
D/StackDump: #27 pc 0000000000065ce4 /system/lib64/libc.so (__pthread_start(void*)+52)
D/StackDump: #28 pc 000000000001ebc4 /system/lib64/libc.so (__start_thread+16)
最初は、おそらくこれは、MediaCodec が書き込んでいる SurfaceTexture で setSurfaceTextureListener() を使用することに関連していると思いました。ただし、これをプログラムから削除しても役に立ちませんでした。デバッガーが関与しているように見えますか？
アプリケーション層からこれを修正するためにできることはありますか? 私はおそらくガベージコレクションに飢えていますか？または、これは Android/Nvidia の問題ですか?