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am 345effc2: Merge "Fix memory leak where we close the descriptor instead of the file." into lmp-mr1-dev

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* commit '345effc2b20a01a892acb4752d8e0c84d8a6ba7d':
  Fix memory leak where we close the descriptor instead of the file.
This commit is contained in:
Derek Sollenberger
2014-09-30 14:53:02 +00:00
committed by Android Git Automerger
parent 61ee8979de 345effc2b2
commit 713e0683ae
1 changed files with 15 additions and 4 deletions
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19
core/jni/android/graphics/BitmapFactory.cpp
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@@ -478,7 +478,7 @@ static jobject nativeDecodeFileDescriptor(JNIEnv* env, jobject clazz, jobject fi
NPE_CHECK_RETURN_ZERO(env, fileDescriptor);
jint descriptor = jniGetFDFromFileDescriptor(env, fileDescriptor);
int descriptor = jniGetFDFromFileDescriptor(env, fileDescriptor);
struct stat fdStat;
if (fstat(descriptor, &fdStat) == -1) {
@@ -486,16 +486,27 @@ static jobject nativeDecodeFileDescriptor(JNIEnv* env, jobject clazz, jobject fi
return nullObjectReturn("fstat return -1");
}
// Restore the descriptor's offset on exiting this function.
// Restore the descriptor's offset on exiting this function. Even though
// we dup the descriptor, both the original and dup refer to the same open
// file description and changes to the file offset in one impact the other.
AutoFDSeek autoRestore(descriptor);
FILE* file = fdopen(descriptor, "r");
// Duplicate the descriptor here to prevent leaking memory. A leak occurs
// if we only close the file descriptor and not the file object it is used to
// create. If we don't explicitly clean up the file (which in turn closes the
// descriptor) the buffers allocated internally by fseek will be leaked.
int dupDescriptor = dup(descriptor);
FILE* file = fdopen(dupDescriptor, "r");
if (file == NULL) {
// cleanup the duplicated descriptor since it will not be closed when the
// file is cleaned up (fclose).
close(dupDescriptor);
return nullObjectReturn("Could not open file");
}
SkAutoTUnref<SkFILEStream> fileStream(new SkFILEStream(file,
SkFILEStream::kCallerRetains_Ownership));
SkFILEStream::kCallerPasses_Ownership));
// Use a buffered stream. Although an SkFILEStream can be rewound, this
// ensures that SkImageDecoder::Factory never rewinds beyond the