clang understands the malloc library call and can optimise calls to it. In particular it will avoid calling malloc completely if it detects that the result is not used.
Signed-off-by: Chris Dearman <[email protected]> --- .../conformance/interfaces/pthread_cond_init/4-1.c | 19 ++++++++++++------- 1 files changed, 12 insertions(+), 7 deletions(-) diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_init/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_init/4-1.c index 287fda1..7932ec2 100644 --- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_init/4-1.c +++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_init/4-1.c @@ -50,7 +50,7 @@ #define ERR_MSG(f, rc) printf("Failed: func: %s rc: %s (%u)\n", \ f, strerror(rc), rc); -/* Max memory for child is 81B */ +/* Max memory for child is 1MB */ #define MAX_MEM ((1<<20)) /* @@ -59,8 +59,8 @@ */ static void child(void) { - char *curr; - char *prev = NULL; + void *curr; + void *prev = NULL; struct rlimit rl; pthread_cond_t cond; pthread_condattr_t attr; @@ -76,10 +76,15 @@ static void child(void) exit(PTS_UNRESOLVED); } - /* Consume all memory we can */ - do { - curr = malloc(1); - } while (curr); + /* + * Consume all memory we can + * It's important to use the malloc() return value in a + * meaningful way to bypass potential compiler optimisations. + */ + while ((curr = malloc(sizeof(void *)))) { + *(void **)curr = prev; + prev = curr; + } if (errno != ENOMEM) { ERR_MSG("malloc()", errno); exit(PTS_UNRESOLVED); -- 1.7.1 ------------------------------------------------------------------------------ Don't let slow site performance ruin your business. Deploy New Relic APM Deploy New Relic app performance management and know exactly what is happening inside your Ruby, Python, PHP, Java, and .NET app Try New Relic at no cost today and get our sweet Data Nerd shirt too! http://p.sf.net/sfu/newrelic-dev2dev _______________________________________________ Ltp-list mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/ltp-list
