| 1 | // RUN: %clangxx_msan -O0 -g %s -o %t && %run %t |
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| 2 | // RUN: %clangxx_msan -O0 -g -DPOSITIVE %s -o %t && not %run %t 2>&1 | FileCheck %s |
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| 3 | |
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| 4 | #include <obstack.h> |
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| 5 | #include <sanitizer/msan_interface.h> |
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| 6 | #include <stdlib.h> |
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| 7 | |
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| 8 | static void *obstack_chunk_alloc(size_t sz) { |
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| 9 | return malloc(size: sz); |
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| 10 | } |
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| 11 | |
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| 12 | static void obstack_chunk_free(void *p) { |
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| 13 | free(ptr: p); |
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| 14 | } |
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| 15 | |
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| 16 | int main(void) { |
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| 17 | obstack obs; |
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| 18 | obstack_init(&obs); |
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| 19 | for (size_t sz = 16; sz < 0xFFFF; sz *= 2) { |
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| 20 | void *p = obstack_alloc(&obs, sz); |
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| 21 | int data[10] = {0}; |
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| 22 | obstack_grow(&obs, &data, sizeof(data)); |
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| 23 | obstack_blank(&obs, sz); |
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| 24 | obstack_grow(&obs, &data, sizeof(data)); |
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| 25 | obstack_int_grow(&obs, 13); |
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| 26 | p = obstack_finish(&obs); |
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| 27 | #ifdef POSITIVE |
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| 28 | if (sz == 4096) { |
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| 29 | __msan_check_mem_is_initialized(p, sizeof(data)); |
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| 30 | __msan_check_mem_is_initialized(p, sizeof(data) + 1); |
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| 31 | } |
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| 32 | // CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value |
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| 33 | // CHECK: #0 0x{{.*}} in main{{.*}}obstack.cpp:[[@LINE-3]] |
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| 34 | #endif |
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| 35 | } |
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| 36 | obstack_free(&obs, 0); |
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| 37 | } |
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| 38 | |
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