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n3.4.8
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n3.3
n3.2.15
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n3.2.13
n3.2.12
n3.2.11
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n3.0.8
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n3.0.1
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n2.8.17
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n2.8.15
n2.8.14
n2.8.13
n2.8.12
n2.8.11
n2.8.10
n2.8.9
n2.8.8
n2.8.7
n2.8.6
n2.8.5
n2.8.4
n2.8.3
n2.8.2
n2.8.1
n2.8
n2.7.7
n2.7.6
n2.7.5
n2.7.4
n2.7.3
n2.7.2
n2.7.1
n2.7
n2.6.9
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n2.6.5
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n2.6.1
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n2.5.11
n2.5.10
n2.5.9
n2.5.8
n2.5.7
n2.5.6
n2.5.5
n2.5.4
n2.5.3
n2.5.2
n2.5.1
n2.5
n2.4.14
n2.4.13
n2.4.12
n2.4.11
n2.4.10
n2.4.9
n2.4.8
n2.4.7
n2.4.6
n2.4.5
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n2.4.3
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n2.4.1
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n2.3.3
n2.3.2
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n2.2.16
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n2.2.12
n2.2.11
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n2.2.1
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n2.1.8
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n2.1.3
n2.1.2
n2.1.1
n2.1
n2.0.7
n2.0.6
n2.0.5
n2.0.4
n2.0.3
n2.0.2
n2.0.1
n2.0
n1.2.12
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n1.2.9
n1.2.8
n1.2.7
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n1.2.1
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n1.1.16
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n1.1.12
n1.1.11
n1.1.10
n1.1.9
n1.1.8
n1.1.7
n1.1.6
n1.1.5
n1.1.4
n1.1.3
n1.1.2
n1.1.1
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n1.0.10
n1.0.9
n1.0.8
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n1.0.6
n1.0.5
n1.0.4
n1.0.3
n1.0.2
n1.0.1
n1.0
n0.11.5
n0.11.4
n0.11.3
n0.11.2
n0.11.1
n0.11
n0.10.16
n0.10.15
n0.10.14
n0.10.13
n0.10.12
n0.10.11
n0.10.10
n0.10.9
n0.10.8
n0.10.7
n0.10.6
n0.10.5
n0.10.4
n0.10.3
n0.10.2
n0.10.1
n0.10
n0.9.4
n0.9.3
n0.9.2
n0.9.1
n0.9
n0.8.15
n0.8.14
n0.8.13
n0.8.12
n0.8.11
n0.8.10
n0.8.9
n0.8.8
n0.8.7
n0.8.6
n0.8.5
n0.8.4
n0.8.3
n0.8.2
n0.8.1
n0.8
n0.7.17
n0.7.16
n0.7.15
n0.7.14
n0.7.13
n0.7.12
n0.7.11
n0.7.10
n0.7.9
n0.7.8
n0.7.7
n0.7.6
n0.7.5
n0.7.4
n0.7.3
n0.7.2
n0.7.1
n0.6.7
n0.6.6
n0.6.5
n0.6.4
ffmpeg-0.6.3
n0.5.15
n0.5.14
n0.5.13
n0.5.12
n0.5.11
n0.5.10
n0.5.9
n0.5.8
n0.5.7
n0.5.6
n0.5.5
N
1 Commits (bca41545b371efc34e38d1fa8bb12dba8b614da0)
1 Commits (bca41545b371efc34e38d1fa8bb12dba8b614da0)
| Author | SHA1 | Message | Date |
|---|---|---|---|
 Wan-Teh Chang
|
2170017a1c |
avutil: fix data race in av_get_cpu_flags()
Make the one-time initialization in av_get_cpu_flags() thread-safe. The
static variables |flags|, |cpuflags_mask|, and |checked| in
libavutil/cpu.c are read and written using normal load and store
operations. These are considered as data races. The fix is to use atomic
load and store operations.
Remove the |checked| variable because the invalid value of -1 for
|flags| can be used to indicate the same condition. Rename |flags| to
|cpu_flags| and move it to file scope.
The fix can be verified by running the libavutil/tests/cpu_init.c test
program under ThreadSanitizer:
./configure --toolchain=clang-tsan
make libavutil/tests/cpu_init
libavutil/tests/cpu_init
There should be no warnings from ThreadSanitizer.
Co-author: Dmitry Vyukov of Google, who suggested the data race fix.
Signed-off-by: Wan-Teh Chang <wtc@google.com>
|
9 years ago |