1 // Test that malloc_zone_from_ptr returns a valid zone for a 0-sized allocation. 2 3 // RUN: %clang_tsan %s -o %t -framework Foundation 4 // RUN: %run %t 2>&1 | FileCheck %s 5 6 #include <malloc/malloc.h> 7 #include <stdio.h> 8 #include <stdlib.h> 9 #include <sys/mman.h> 10 11 int some_global; 12 13 void describe_zone(void *p) { 14 malloc_zone_t *z = malloc_zone_from_ptr(p); 15 if (z) { 16 fprintf(stderr, "zone = %p\n", z); 17 } else { 18 fprintf(stderr, "zone = no zone\n"); 19 } 20 } 21 22 int main() { 23 void *p; 24 size_t s; 25 26 p = malloc(0x40); 27 s = malloc_size(p); 28 fprintf(stderr, "size = 0x%zx\n", s); 29 // CHECK: size = 0x40 30 describe_zone(p); 31 // CHECK: zone = 0x{{[0-9a-f]+}} 32 33 p = malloc(0); 34 s = malloc_size(p); 35 fprintf(stderr, "size = 0x%zx\n", s); 36 // CHECK: size = 0x1 37 describe_zone(p); 38 // CHECK: zone = 0x{{[0-9a-f]+}} 39 40 p = &some_global; 41 s = malloc_size(p); 42 fprintf(stderr, "size = 0x%zx\n", s); 43 // CHECK: size = 0x0 44 describe_zone(p); 45 // CHECK: zone = no zone 46 47 p = mmap(0, 0x1000, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, -1, 0); 48 if (!p) { 49 fprintf(stderr, "mmap failed\n"); 50 exit(1); 51 } 52 s = malloc_size(p); 53 fprintf(stderr, "size = 0x%zx\n", s); 54 // CHECK: size = 0x0 55 describe_zone(p); 56 // CHECK: zone = no zone 57 } 58
