| 1 | // Test that malloc_zone_from_ptr returns a valid zone for a 0-sized allocation. |
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| 2 | // Test that malloc_size does not crash for an invalid pointer. |
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| 3 | |
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| 4 | // RUN: %clang_tsan %s -o %t -framework Foundation |
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| 5 | // RUN: %run %t 2>&1 | FileCheck %s |
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| 6 | |
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| 7 | #include <malloc/malloc.h> |
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| 8 | #include <stdio.h> |
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| 9 | #include <stdlib.h> |
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| 10 | #include <sys/mman.h> |
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| 11 | |
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| 12 | int some_global; |
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| 13 | |
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| 14 | void describe_zone(void *p) { |
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| 15 | malloc_zone_t *z = malloc_zone_from_ptr(p); |
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| 16 | if (z) { |
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| 17 | fprintf(stderr, "zone = %p\n" , z); |
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| 18 | } else { |
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| 19 | fprintf(stderr, format: "zone = no zone\n" ); |
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| 20 | } |
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| 21 | } |
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| 22 | |
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| 23 | int main() { |
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| 24 | void *p; |
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| 25 | size_t s; |
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| 26 | |
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| 27 | p = malloc(size: 0x40); |
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| 28 | s = malloc_size(p); |
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| 29 | fprintf(stderr, format: "size = 0x%zx\n" , s); |
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| 30 | // CHECK: size = 0x40 |
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| 31 | describe_zone(p); |
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| 32 | // CHECK: zone = 0x{{[0-9a-f]+}} |
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| 33 | |
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| 34 | p = malloc(size: 0); |
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| 35 | s = malloc_size(p); |
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| 36 | fprintf(stderr, format: "size = 0x%zx\n" , s); |
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| 37 | // CHECK: size = 0x1 |
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| 38 | describe_zone(p); |
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| 39 | // CHECK: zone = 0x{{[0-9a-f]+}} |
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| 40 | |
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| 41 | p = &some_global; |
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| 42 | s = malloc_size(p); |
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| 43 | fprintf(stderr, format: "size = 0x%zx\n" , s); |
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| 44 | // CHECK: size = 0x0 |
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| 45 | describe_zone(p); |
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| 46 | // CHECK: zone = no zone |
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| 47 | |
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| 48 | p = mmap(addr: 0, len: 0x1000, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, fd: -1, offset: 0); |
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| 49 | if (!p) { |
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| 50 | fprintf(stderr, format: "mmap failed\n" ); |
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| 51 | exit(status: 1); |
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| 52 | } |
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| 53 | s = malloc_size(p); |
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| 54 | fprintf(stderr, format: "size = 0x%zx\n" , s); |
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| 55 | // CHECK: size = 0x0 |
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| 56 | describe_zone(p); |
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| 57 | // CHECK: zone = no zone |
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| 58 | |
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| 59 | p = (void *)0x42; // invalid pointer |
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| 60 | s = malloc_size(p); |
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| 61 | fprintf(stderr, format: "size = 0x%zx\n" , s); |
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| 62 | // CHECK: size = 0x0 |
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| 63 | describe_zone(p); |
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| 64 | // CHECK: zone = no zone |
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| 65 | |
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| 66 | return 0; |
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| 67 | } |
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| 68 | |
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