text: #include "test/jemalloc_test.h"
  
  static size_t
  zero_reallocs() {
  	if (!config_stats) {
  		return 0;
  	}
  	size_t count = 12345;
  	size_t sz = sizeof(count);
  
  	expect_d_eq(mallctl("stats.zero_reallocs", (void *)&count, &sz,
  	    NULL, 0), 0, "Unexpected mallctl failure");
  	return count;
  }
  
  TEST_BEGIN(test_zero_reallocs) {
  	test_skip_if(!config_stats);
  
  	for (size_t i = 0; i < 100; ++i) {
  		void *ptr = mallocx(i * i + 1, 0);
  		expect_ptr_not_null(ptr, "Unexpected mallocx error");
  		size_t count = zero_reallocs();
  		expect_zu_eq(i, count, "Incorrect zero realloc count");
  		ptr = realloc(ptr, 0);
  		expect_ptr_null(ptr, "Realloc didn't free");
  		count = zero_reallocs();
  		expect_zu_eq(i + 1, count, "Realloc didn't adjust count");
  	}
  }
  TEST_END
  
  int
  main(void) {
  	/*
  	 * We expect explicit counts; reentrant tests run multiple times, so
  	 * counts leak across runs.
  	 */
  	return test_no_reentrancy(
  	    test_zero_reallocs);
  }
  