Avoid storing 'this' in a wp<AudioEffect> while in constructor
Storing 'this' into wp<AudioEffect> while running the constructor
of an AudioEffect can lead to premature instance destruction
because the owner of this weak pointer may promote to sp<>
on a thread running in parallel to the constructor.
Fixed by removing a call to AudioEffect::set from the constructor
and moving the responsibility for calling it to client code.
Bug: 162323621
Test: repro steps from the bug
atest android.media.cts.VisualizerTest
Change-Id: Ice5f510b1c9020b5ba73bd6223c1669ab8eae24c
diff --git a/services/audiopolicy/service/AudioPolicyEffects.cpp b/services/audiopolicy/service/AudioPolicyEffects.cpp
index 1ec0c5e..b738633 100644
--- a/services/audiopolicy/service/AudioPolicyEffects.cpp
+++ b/services/audiopolicy/service/AudioPolicyEffects.cpp
@@ -121,8 +121,8 @@
Vector <EffectDesc *> effects = mInputSources.valueAt(index)->mEffects;
for (size_t i = 0; i < effects.size(); i++) {
EffectDesc *effect = effects[i];
- sp<AudioEffect> fx = new AudioEffect(NULL, String16("android"), &effect->mUuid, -1, 0,
- 0, audioSession, input);
+ sp<AudioEffect> fx = new AudioEffect(String16("android"));
+ fx->set(NULL, &effect->mUuid, -1, 0, 0, audioSession, input);
status_t status = fx->initCheck();
if (status != NO_ERROR && status != ALREADY_EXISTS) {
ALOGW("addInputEffects(): failed to create Fx %s on source %d",
@@ -270,8 +270,8 @@
Vector <EffectDesc *> effects = mOutputStreams.valueAt(index)->mEffects;
for (size_t i = 0; i < effects.size(); i++) {
EffectDesc *effect = effects[i];
- sp<AudioEffect> fx = new AudioEffect(NULL, String16("android"), &effect->mUuid, 0, 0, 0,
- audioSession, output);
+ sp<AudioEffect> fx = new AudioEffect(String16("android"));
+ fx->set(NULL, &effect->mUuid, 0, 0, 0, audioSession, output);
status_t status = fx->initCheck();
if (status != NO_ERROR && status != ALREADY_EXISTS) {
ALOGE("addOutputSessionEffects(): failed to create Fx %s on session %d",
@@ -970,11 +970,11 @@
for (const auto& deviceEffectsIter : mDeviceEffects) {
const auto& deviceEffects = deviceEffectsIter.second;
for (const auto& effectDesc : deviceEffects->mEffectDescriptors->mEffects) {
- auto fx = std::make_unique<AudioEffect>(
- EFFECT_UUID_NULL, String16("android"), &effectDesc->mUuid, 0, nullptr,
- nullptr, AUDIO_SESSION_DEVICE, AUDIO_IO_HANDLE_NONE,
- AudioDeviceTypeAddr{deviceEffects->getDeviceType(),
- deviceEffects->getDeviceAddress()});
+ auto fx = std::make_unique<AudioEffect>(String16("android"));
+ fx->set(EFFECT_UUID_NULL, &effectDesc->mUuid, 0, nullptr,
+ nullptr, AUDIO_SESSION_DEVICE, AUDIO_IO_HANDLE_NONE,
+ AudioDeviceTypeAddr{deviceEffects->getDeviceType(),
+ deviceEffects->getDeviceAddress()});
status_t status = fx->initCheck();
if (status != NO_ERROR && status != ALREADY_EXISTS) {
ALOGE("%s(): failed to create Fx %s on port type=%d address=%s", __func__,