derek.holloway
7502bf64a4
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45 lines
2.1 KiB
C
45 lines
2.1 KiB
C
// RUN: %clang_hwasan -O0 -DISREAD=1 %s -o %t && not %run %t 2>&1 | FileCheck %s --check-prefixes=CHECK
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// RUN: %clang_hwasan -O1 -DISREAD=1 %s -o %t && not %run %t 2>&1 | FileCheck %s --check-prefixes=CHECK
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// RUN: %clang_hwasan -O2 -DISREAD=1 %s -o %t && not %run %t 2>&1 | FileCheck %s --check-prefixes=CHECK
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// RUN: %clang_hwasan -O3 -DISREAD=1 %s -o %t && not %run %t 2>&1 | FileCheck %s --check-prefixes=CHECK
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// RUN: %clang_hwasan -O0 -DISREAD=0 %s -o %t && not %run %t 2>&1 | FileCheck %s --check-prefixes=CHECK
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#include <stdlib.h>
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#include <stdio.h>
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#include <sanitizer/hwasan_interface.h>
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int main() {
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__hwasan_enable_allocator_tagging();
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char * volatile x = (char*)malloc(10);
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free(x);
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__hwasan_disable_allocator_tagging();
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fprintf(stderr, ISREAD ? "Going to do a READ\n" : "Going to do a WRITE\n");
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fflush(stderr);
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// CHECK: Going to do a [[TYPE:[A-Z]*]]
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int r = 0;
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if (ISREAD) r = x[5]; else x[5] = 42; // should be on the same line.
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// CHECK: ERROR: HWAddressSanitizer: tag-mismatch on address {{.*}} at pc {{[0x]+}}[[PC:.*]]
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// CHECK: [[TYPE]] of size 1 at {{.*}} tags: [[PTR_TAG:[0-9a-f][0-9a-f]]]/[[MEM_TAG:[0-9a-f][0-9a-f]]] (ptr/mem)
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// CHECK: #{{[0-9]}} {{[0-9]+}}{{.*}}[[PC]]
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// If we instrument using calls (default on x86), main is not the top frame
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// of the fault.
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// CHECK: in main {{.*}}use-after-free.c:[[@LINE-6]]
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// Offset is 5 or 11 depending on left/right alignment.
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// CHECK: is a small unallocated heap chunk; size: {{16|32}} offset: {{5|11}}
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// CHECK: Cause: use-after-free
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// CHECK: is located 5 bytes inside a 10-byte region
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//
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// CHECK: freed by thread {{.*}} here:
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// CHECK: #0 {{.*}} in {{.*}}free{{.*}} {{.*}}hwasan_allocation_functions.cpp
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// CHECK: #1 {{.*}} in main {{.*}}use-after-free.c:[[@LINE-20]]
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// CHECK: previously allocated by thread {{.*}} here:
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// CHECK: #0 {{.*}} in {{.*}}malloc{{.*}} {{.*}}hwasan_allocation_functions.cpp
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// CHECK: #1 {{.*}} in main {{.*}}use-after-free.c:[[@LINE-25]]
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// CHECK: Memory tags around the buggy address (one tag corresponds to 16 bytes):
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// CHECK: =>{{.*}}[[MEM_TAG]]
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// CHECK: SUMMARY: HWAddressSanitizer: tag-mismatch {{.*}} in main
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return r;
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}
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