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| author | Stan Shebs <stanshebs@google.com> | 2018-05-09 11:26:35 -0700 |
|---|---|---|
| committer | Stan Shebs <stanshebs@google.com> | 2018-05-09 11:26:35 -0700 |
| commit | 40513af8adceabbfbfd7c64631c0fb6e57373c23 (patch) | |
| tree | ad966a99268528c474077f95c17d800badda1425 /string | |
| parent | 903b7aed7c0122c37f5c5fe93a20a92f5274b10a (diff) | |
| download | glibc-40513af8adceabbfbfd7c64631c0fb6e57373c23.zip glibc-40513af8adceabbfbfd7c64631c0fb6e57373c23.tar.gz glibc-40513af8adceabbfbfd7c64631c0fb6e57373c23.tar.bz2 | |
Forestall optimization-out of a buffer.
Diffstat (limited to 'string')
| -rw-r--r-- | string/tst-xbzero-opt.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/string/tst-xbzero-opt.c b/string/tst-xbzero-opt.c index cf7041f..e9c411b 100644 --- a/string/tst-xbzero-opt.c +++ b/string/tst-xbzero-opt.c @@ -110,11 +110,17 @@ prepare_test_buffer (unsigned char *buf) abort (); } +/* Use a volatile global to ensure that aggressive compilers don't + decide that the test buffer is unused and evaporate it. */ + +volatile unsigned char *vol_glob; + static void setup_no_clear (void) { unsigned char buf[TEST_BUFFER_SIZE]; prepare_test_buffer (buf); + vol_glob = buf; } static void @@ -123,6 +129,7 @@ setup_ordinary_clear (void) unsigned char buf[TEST_BUFFER_SIZE]; prepare_test_buffer (buf); memset (buf, 0, TEST_BUFFER_SIZE); + vol_glob = buf; } static void |