Thwart optimization of free(malloc(1)) in microbench.
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@ -31,46 +31,52 @@ compare_funcs(uint64_t nwarmup, uint64_t niter, const char *name_a,
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}
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static void
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malloc_vs_mallocx_malloc(void)
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malloc_free(void)
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{
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free(malloc(1));
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/* The compiler can optimize away free(malloc(1))! */
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void *p = malloc(1);
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if (p == NULL) {
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test_fail("Unexpected malloc() failure");
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return;
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}
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free(p);
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}
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static void
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malloc_vs_mallocx_mallocx(void)
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mallocx_free(void)
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{
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free(mallocx(1, 0));
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void *p = mallocx(1, 0);
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if (p == NULL) {
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test_fail("Unexpected mallocx() failure");
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return;
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}
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free(p);
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}
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TEST_BEGIN(test_malloc_vs_mallocx)
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{
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compare_funcs(10*1000*1000, 100*1000*1000, "malloc",
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malloc_vs_mallocx_malloc, "mallocx", malloc_vs_mallocx_mallocx);
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malloc_free, "mallocx", mallocx_free);
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}
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TEST_END
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static void
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free_vs_dallocx_free(void)
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malloc_dallocx(void)
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{
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free(malloc(1));
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}
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static void
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free_vs_dallocx_dallocx(void)
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{
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dallocx(malloc(1), 0);
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void *p = malloc(1);
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if (p == NULL) {
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test_fail("Unexpected malloc() failure");
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return;
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}
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dallocx(p, 0);
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}
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TEST_BEGIN(test_free_vs_dallocx)
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{
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compare_funcs(10*1000*1000, 100*1000*1000, "free", free_vs_dallocx_free,
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"dallocx", free_vs_dallocx_dallocx);
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compare_funcs(10*1000*1000, 100*1000*1000, "free", malloc_free,
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"dallocx", malloc_dallocx);
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}
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TEST_END
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