jemalloc/test/integration/thread_tcache_enabled.c

#include "test/jemalloc_test.h"

static const bool config_tcache =
#ifdef JEMALLOC_TCACHE
    true
#else
    false
#endif
    ;

void *
thd_start(void *arg)
{
	int err;
	size_t sz;
	bool e0, e1;

	sz = sizeof(bool);
	if ((err = mallctl("thread.tcache.enabled", &e0, &sz, NULL, 0))) {
		if (err == ENOENT) {
			assert_false(config_tcache,
			    "ENOENT should only be returned if tcache is "
			    "disabled");
		}
		goto label_ENOENT;
	}

	if (e0) {
		e1 = false;
		assert_d_eq(mallctl("thread.tcache.enabled", &e0, &sz, &e1, sz),
		    0, "Unexpected mallctl() error");
		assert_true(e0, "tcache should be enabled");
	}

	e1 = true;
	assert_d_eq(mallctl("thread.tcache.enabled", &e0, &sz, &e1, sz), 0,
	    "Unexpected mallctl() error");
	assert_false(e0, "tcache should be disabled");

	e1 = true;
	assert_d_eq(mallctl("thread.tcache.enabled", &e0, &sz, &e1, sz), 0,
	    "Unexpected mallctl() error");
	assert_true(e0, "tcache should be enabled");

	e1 = false;
	assert_d_eq(mallctl("thread.tcache.enabled", &e0, &sz, &e1, sz), 0,
	    "Unexpected mallctl() error");
	assert_true(e0, "tcache should be enabled");

	e1 = false;
	assert_d_eq(mallctl("thread.tcache.enabled", &e0, &sz, &e1, sz), 0,
	    "Unexpected mallctl() error");
	assert_false(e0, "tcache should be disabled");

	free(malloc(1));
	e1 = true;
	assert_d_eq(mallctl("thread.tcache.enabled", &e0, &sz, &e1, sz), 0,
	    "Unexpected mallctl() error");
	assert_false(e0, "tcache should be disabled");

	free(malloc(1));
	e1 = true;
	assert_d_eq(mallctl("thread.tcache.enabled", &e0, &sz, &e1, sz), 0,
	    "Unexpected mallctl() error");
	assert_true(e0, "tcache should be enabled");

	free(malloc(1));
	e1 = false;
	assert_d_eq(mallctl("thread.tcache.enabled", &e0, &sz, &e1, sz), 0,
	    "Unexpected mallctl() error");
	assert_true(e0, "tcache should be enabled");

	free(malloc(1));
	e1 = false;
	assert_d_eq(mallctl("thread.tcache.enabled", &e0, &sz, &e1, sz), 0,
	    "Unexpected mallctl() error");
	assert_false(e0, "tcache should be disabled");

	free(malloc(1));
	return (NULL);
label_ENOENT:
	test_skip("\"thread.tcache.enabled\" mallctl not available");
	return (NULL);
}

TEST_BEGIN(test_main_thread)
{

	thd_start(NULL);
}
TEST_END

TEST_BEGIN(test_subthread)
{
	thd_t thd;

	thd_create(&thd, thd_start, NULL);
	thd_join(thd, NULL);
}
TEST_END

int
main(void)
{

	/* Run tests multiple times to check for bad interactions. */
	return (test(
	    test_main_thread,
	    test_subthread,
	    test_main_thread,
	    test_subthread,
	    test_main_thread));
}