| 1 | // RUN: %clang_hwasan %s -o %t && not %env_hwasan_opts=verbose_threads=1 %run %t 2>&1 | FileCheck %s |
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| 2 | |
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| 3 | #include <pthread.h> |
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| 4 | #include <stdlib.h> |
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| 5 | #include <stdio.h> |
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| 6 | |
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| 7 | #include <sanitizer/hwasan_interface.h> |
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| 8 | |
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| 9 | void *BoringThread(void *arg) { |
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| 10 | char * volatile x = (char*)malloc(size: 10); |
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| 11 | x[5] = 0; |
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| 12 | free(ptr: x); |
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| 13 | return NULL; |
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| 14 | } |
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| 15 | |
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| 16 | // CHECK: Creating : T0 |
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| 17 | // CHECK: Creating : T1 |
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| 18 | // CHECK: Destroying: T1 |
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| 19 | // CHECK: Creating : T1100 |
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| 20 | // CHECK: Destroying: T1100 |
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| 21 | // CHECK: Creating : T1101 |
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| 22 | |
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| 23 | void *UAFThread(void *arg) { |
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| 24 | char * volatile x = (char*)malloc(size: 10); |
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| 25 | fprintf(stderr, format: "ZZZ %p\n" , x); |
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| 26 | free(ptr: x); |
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| 27 | x[5] = 42; |
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| 28 | // CHECK: ERROR: HWAddressSanitizer: tag-mismatch on address |
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| 29 | // CHECK: WRITE of size 1 |
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| 30 | // CHECK: many-threads-uaf.c:[[@LINE-3]] |
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| 31 | // CHECK: Thread: T1101 |
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| 32 | return NULL; |
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| 33 | } |
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| 34 | |
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| 35 | int main() { |
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| 36 | __hwasan_enable_allocator_tagging(); |
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| 37 | pthread_t t; |
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| 38 | for (int i = 0; i < 1100; i++) { |
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| 39 | pthread_create(newthread: &t, NULL, start_routine: BoringThread, NULL); |
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| 40 | pthread_join(th: t, NULL); |
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| 41 | } |
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| 42 | pthread_create(newthread: &t, NULL, start_routine: UAFThread, NULL); |
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| 43 | pthread_join(th: t, NULL); |
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| 44 | } |
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| 45 | |
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