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