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Thwart optimization of free(malloc(1)) in microbench.

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This commit is contained in:
Jason Evans 2014-09-08 16:23:48 -07:00
parent c54f93f186
commit a1f3929ffd
1 changed files with 25 additions and 19 deletions
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44
test/stress/microbench.c
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@ -31,46 +31,52 @@ compare_funcs(uint64_t nwarmup, uint64_t niter, const char *name_a,
}
static void
malloc_vs_mallocx_malloc(void)
malloc_free(void)
{
free(malloc(1));
/* The compiler can optimize away free(malloc(1))! */
void *p = malloc(1);
if (p == NULL) {
test_fail("Unexpected malloc() failure");
return;
}
free(p);
}
static void
malloc_vs_mallocx_mallocx(void)
mallocx_free(void)
{
free(mallocx(1, 0));
void *p = mallocx(1, 0);
if (p == NULL) {
test_fail("Unexpected mallocx() failure");
return;
}
free(p);
}
TEST_BEGIN(test_malloc_vs_mallocx)
{
compare_funcs(10*1000*1000, 100*1000*1000, "malloc",
malloc_vs_mallocx_malloc, "mallocx", malloc_vs_mallocx_mallocx);
malloc_free, "mallocx", mallocx_free);
}
TEST_END
static void
free_vs_dallocx_free(void)
malloc_dallocx(void)
{
free(malloc(1));
}
static void
free_vs_dallocx_dallocx(void)
{
dallocx(malloc(1), 0);
void *p = malloc(1);
if (p == NULL) {
test_fail("Unexpected malloc() failure");
return;
}
dallocx(p, 0);
}
TEST_BEGIN(test_free_vs_dallocx)
{
compare_funcs(10*1000*1000, 100*1000*1000, "free", free_vs_dallocx_free,
"dallocx", free_vs_dallocx_dallocx);
compare_funcs(10*1000*1000, 100*1000*1000, "free", malloc_free,
"dallocx", malloc_dallocx);
}
TEST_END