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
Bug: 174222126
Test: repro steps from the bug
atest android.media.cts.VisualizerTest
Change-Id: Ice5f510b1c9020b5ba73bd6223c1669ab8eae24c
Merged-In: Ice5f510b1c9020b5ba73bd6223c1669ab8eae24c
diff --git a/media/libaudioclient/AudioEffect.cpp b/media/libaudioclient/AudioEffect.cpp
index 3ead6cb..73b96ab 100644
--- a/media/libaudioclient/AudioEffect.cpp
+++ b/media/libaudioclient/AudioEffect.cpp
@@ -36,64 +36,10 @@
// ---------------------------------------------------------------------------
AudioEffect::AudioEffect(const String16& opPackageName)
- : mStatus(NO_INIT), mProbe(false), mOpPackageName(opPackageName)
+ : mOpPackageName(opPackageName)
{
}
-
-AudioEffect::AudioEffect(const effect_uuid_t *type,
- const String16& opPackageName,
- const effect_uuid_t *uuid,
- int32_t priority,
- effect_callback_t cbf,
- void* user,
- audio_session_t sessionId,
- audio_io_handle_t io,
- const AudioDeviceTypeAddr& device,
- bool probe
- )
- : mStatus(NO_INIT), mProbe(false), mOpPackageName(opPackageName)
-{
- AutoMutex lock(mConstructLock);
- mStatus = set(type, uuid, priority, cbf, user, sessionId, io, device, probe);
-}
-
-AudioEffect::AudioEffect(const char *typeStr,
- const String16& opPackageName,
- const char *uuidStr,
- int32_t priority,
- effect_callback_t cbf,
- void* user,
- audio_session_t sessionId,
- audio_io_handle_t io,
- const AudioDeviceTypeAddr& device,
- bool probe
- )
- : mStatus(NO_INIT), mProbe(false), mOpPackageName(opPackageName)
-{
- effect_uuid_t type;
- effect_uuid_t *pType = NULL;
- effect_uuid_t uuid;
- effect_uuid_t *pUuid = NULL;
-
- ALOGV("Constructor string\n - type: %s\n - uuid: %s", typeStr, uuidStr);
-
- if (typeStr != NULL) {
- if (stringToGuid(typeStr, &type) == NO_ERROR) {
- pType = &type;
- }
- }
-
- if (uuidStr != NULL) {
- if (stringToGuid(uuidStr, &uuid) == NO_ERROR) {
- pUuid = &uuid;
- }
- }
-
- AutoMutex lock(mConstructLock);
- mStatus = set(pType, pUuid, priority, cbf, user, sessionId, io, device, probe);
-}
-
status_t AudioEffect::set(const effect_uuid_t *type,
const effect_uuid_t *uuid,
int32_t priority,
@@ -194,6 +140,34 @@
return mStatus;
}
+status_t AudioEffect::set(const char *typeStr,
+ const char *uuidStr,
+ int32_t priority,
+ effect_callback_t cbf,
+ void* user,
+ audio_session_t sessionId,
+ audio_io_handle_t io,
+ const AudioDeviceTypeAddr& device,
+ bool probe)
+{
+ effect_uuid_t type;
+ effect_uuid_t *pType = nullptr;
+ effect_uuid_t uuid;
+ effect_uuid_t *pUuid = nullptr;
+
+ ALOGV("AudioEffect::set string\n - type: %s\n - uuid: %s",
+ typeStr ? typeStr : "nullptr", uuidStr ? uuidStr : "nullptr");
+
+ if (stringToGuid(typeStr, &type) == NO_ERROR) {
+ pType = &type;
+ }
+ if (stringToGuid(uuidStr, &uuid) == NO_ERROR) {
+ pUuid = &uuid;
+ }
+
+ return set(pType, pUuid, priority, cbf, user, sessionId, io, device, probe);
+}
+
AudioEffect::~AudioEffect()
{