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      1 #include "test/jemalloc_test.h"
      2 
      3 static size_t
      4 zero_reallocs() {
      5 	if (!config_stats) {
      6 		return 0;
      7 	}
      8 	size_t count = 12345;
      9 	size_t sz = sizeof(count);
     10 
     11 	expect_d_eq(mallctl("stats.zero_reallocs", (void *)&count, &sz,
     12 	    NULL, 0), 0, "Unexpected mallctl failure");
     13 	return count;
     14 }
     15 
     16 TEST_BEGIN(test_zero_reallocs) {
     17 	test_skip_if(!config_stats);
     18 
     19 	for (size_t i = 0; i < 100; ++i) {
     20 		void *ptr = mallocx(i * i + 1, 0);
     21 		expect_ptr_not_null(ptr, "Unexpected mallocx error");
     22 		size_t count = zero_reallocs();
     23 		expect_zu_eq(i, count, "Incorrect zero realloc count");
     24 		ptr = realloc(ptr, 0);
     25 		expect_ptr_null(ptr, "Realloc didn't free");
     26 		count = zero_reallocs();
     27 		expect_zu_eq(i + 1, count, "Realloc didn't adjust count");
     28 	}
     29 }
     30 TEST_END
     31 
     32 int
     33 main(void) {
     34 	/*
     35 	 * We expect explicit counts; reentrant tests run multiple times, so
     36 	 * counts leak across runs.
     37 	 */
     38 	return test_no_reentrancy(
     39 	    test_zero_reallocs);
     40 }
     41