forked from OSchip/llvm-project
38 lines
1012 B
C++
38 lines
1012 B
C++
// RUN: %clangxx_msan -O0 -g %s -o %t && %run %t
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// RUN: %clangxx_msan -O0 -g -DPOSITIVE %s -o %t && not %run %t 2>&1 | FileCheck %s
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#include <obstack.h>
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#include <sanitizer/msan_interface.h>
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#include <stdlib.h>
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static void *obstack_chunk_alloc(size_t sz) {
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return malloc(sz);
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}
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static void obstack_chunk_free(void *p) {
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free(p);
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}
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int main(void) {
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obstack obs;
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obstack_init(&obs);
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for (size_t sz = 16; sz < 0xFFFF; sz *= 2) {
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void *p = obstack_alloc(&obs, sz);
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int data[10] = {0};
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obstack_grow(&obs, &data, sizeof(data));
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obstack_blank(&obs, sz);
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obstack_grow(&obs, &data, sizeof(data));
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obstack_int_grow(&obs, 13);
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p = obstack_finish(&obs);
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#ifdef POSITIVE
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if (sz == 4096) {
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__msan_check_mem_is_initialized(p, sizeof(data));
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__msan_check_mem_is_initialized(p, sizeof(data) + 1);
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}
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// CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value
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// CHECK: #0 0x{{.*}} in main{{.*}}obstack.cc:[[@LINE-3]]
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#endif
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}
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obstack_free(&obs, 0);
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}
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