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infallible_new.cpp revision 1.1.1.1 
      1 #include <stdio.h>
      2 
      3 #include "test/jemalloc_test.h"
      4 
      5 static_assert(JEMALLOC_INFALLIBLE_NEW == 1);
      6 
      7 /*
      8  * Verifies that, when jemalloc is built with --enable-cxx-infallible-new,
      9  * throwing operator new on OOM aborts via safety_check_fail. The test hook
     10  * intercepts the abort and asserts the size-bearing message prefix.
     11  */
     12 bool fake_abort_called;
     13 void
     14 fake_abort(const char *message) {
     15 	const char *expected_start = "<jemalloc>: Allocation of size";
     16 	if (strncmp(message, expected_start, strlen(expected_start)) != 0) {
     17 		abort();
     18 	}
     19 	fake_abort_called = true;
     20 }
     21 
     22 static bool
     23 own_operator_new(void) {
     24 	uint64_t before, after;
     25 	size_t   sz = sizeof(before);
     26 
     27 	/* thread.allocated is always available, even w/o config_stats. */
     28 	expect_d_eq(mallctl("thread.allocated", (void *)&before, &sz, NULL, 0),
     29 	    0, "Unexpected mallctl failure reading stats");
     30 	void *volatile ptr = ::operator new((size_t)8);
     31 	expect_ptr_not_null(ptr, "Unexpected allocation failure");
     32 	expect_d_eq(mallctl("thread.allocated", (void *)&after, &sz, NULL, 0),
     33 	    0, "Unexpected mallctl failure reading stats");
     34 
     35 	return (after != before);
     36 }
     37 
     38 TEST_BEGIN(test_failing_alloc) {
     39 	test_hooks_safety_check_abort = &fake_abort;
     40 
     41 	/*
     42 	 * Not owning operator new is only expected to happen on MinGW which
     43 	 * does not support operator new / delete replacement.
     44 	 */
     45 #ifdef _WIN32
     46 	test_skip_if(!own_operator_new());
     47 #else
     48 	expect_true(own_operator_new(), "No operator new overload");
     49 #endif
     50 	void *volatile ptr = (void *)1;
     51 	try {
     52 		/* Too big of an allocation to succeed. */
     53 		ptr = ::operator new((size_t)-1);
     54 	} catch (...) {
     55 		abort();
     56 	}
     57 	expect_ptr_null(ptr, "Allocation should have failed");
     58 	expect_b_eq(fake_abort_called, true, "Abort hook not invoked");
     59 	test_hooks_safety_check_abort = NULL;
     60 }
     61 TEST_END
     62 
     63 int
     64 main(void) {
     65 	return test(test_failing_alloc);
     66 }
     67