| 1 | // RUN: %clangxx_msan -fno-sanitize-memory-param-retval -fsanitize-memory-track-origins=2 -O3 %s -o %t && \ |
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| 2 | // RUN: env MSAN_OPTIONS=store_context_size=1 not %run %t 2>&1 | FileCheck %s |
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| 3 | |
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| 4 | // Test that stack trace for the intermediate store is not empty. |
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| 5 | |
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| 6 | // CHECK: MemorySanitizer: use-of-uninitialized-value |
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| 7 | // CHECK: #0 {{.*}} in main |
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| 8 | |
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| 9 | // CHECK: Uninitialized value was stored to memory at |
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| 10 | // CHECK: #0 {{.*}} in fn_g |
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| 11 | // CHECK-NOT: #1 |
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| 12 | |
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| 13 | // CHECK: Uninitialized value was created by an allocation of 'z' in the stack frame |
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| 14 | // CHECK: #0 {{.*}} in main |
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| 15 | |
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| 16 | #include <stdio.h> |
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| 17 | |
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| 18 | volatile int x; |
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| 19 | |
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| 20 | __attribute__((noinline)) |
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| 21 | void fn_g(int a) { |
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| 22 | x = a; |
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| 23 | } |
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| 24 | |
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| 25 | __attribute__((noinline)) |
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| 26 | void fn_f(int a) { |
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| 27 | fn_g(a); |
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| 28 | } |
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| 29 | |
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| 30 | int main(int argc, char *argv[]) { |
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| 31 | int volatile z; |
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| 32 | fn_f(a: z); |
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| 33 | return x; |
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| 34 | } |
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| 35 | |
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