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      1 #include "test/jemalloc_test.h"
      2 
      3 TEST_BEGIN(test_overflow) {
      4 	unsigned nlextents;
      5 	size_t mib[4];
      6 	size_t sz, miblen, max_size_class;
      7 	void *p;
      8 
      9 	sz = sizeof(unsigned);
     10 	assert_d_eq(mallctl("arenas.nlextents", (void *)&nlextents, &sz, NULL,
     11 	    0), 0, "Unexpected mallctl() error");
     12 
     13 	miblen = sizeof(mib) / sizeof(size_t);
     14 	assert_d_eq(mallctlnametomib("arenas.lextent.0.size", mib, &miblen), 0,
     15 	    "Unexpected mallctlnametomib() error");
     16 	mib[2] = nlextents - 1;
     17 
     18 	sz = sizeof(size_t);
     19 	assert_d_eq(mallctlbymib(mib, miblen, (void *)&max_size_class, &sz,
     20 	    NULL, 0), 0, "Unexpected mallctlbymib() error");
     21 
     22 	assert_ptr_null(malloc(max_size_class + 1),
     23 	    "Expected OOM due to over-sized allocation request");
     24 	assert_ptr_null(malloc(SIZE_T_MAX),
     25 	    "Expected OOM due to over-sized allocation request");
     26 
     27 	assert_ptr_null(calloc(1, max_size_class + 1),
     28 	    "Expected OOM due to over-sized allocation request");
     29 	assert_ptr_null(calloc(1, SIZE_T_MAX),
     30 	    "Expected OOM due to over-sized allocation request");
     31 
     32 	p = malloc(1);
     33 	assert_ptr_not_null(p, "Unexpected malloc() OOM");
     34 	assert_ptr_null(realloc(p, max_size_class + 1),
     35 	    "Expected OOM due to over-sized allocation request");
     36 	assert_ptr_null(realloc(p, SIZE_T_MAX),
     37 	    "Expected OOM due to over-sized allocation request");
     38 	free(p);
     39 }
     40 TEST_END
     41 
     42 int
     43 main(void) {
     44 	return test(
     45 	    test_overflow);
     46 }
     47