File: chained_origin_empty_stack.cpp

package info (click to toggle)
llvm-toolchain-15 1%3A15.0.6-4
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,554,644 kB
  • sloc: cpp: 5,922,452; ansic: 1,012,136; asm: 674,362; python: 191,568; objc: 73,855; f90: 42,327; lisp: 31,913; pascal: 11,973; javascript: 10,144; sh: 9,421; perl: 7,447; ml: 5,527; awk: 3,523; makefile: 2,520; xml: 885; cs: 573; fortran: 567
file content (34 lines) | stat: -rw-r--r-- 773 bytes parent folder | download | duplicates (20) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
 
// RUN: %clangxx_msan -fsanitize-memory-track-origins=2 -O3 %s -o %t && \
// RUN:     MSAN_OPTIONS=store_context_size=1 not %run %t 2>&1 | FileCheck %s

// Test that stack trace for the intermediate store is not empty.

// CHECK: MemorySanitizer: use-of-uninitialized-value
// CHECK:   #0 {{.*}} in main

// CHECK: Uninitialized value was stored to memory at
// CHECK:   #0 {{.*}} in fn_g
// CHECK-NOT: #1

// CHECK: Uninitialized value was created by an allocation of 'z' in the stack frame of function 'main'
// CHECK:   #0 {{.*}} in main

#include <stdio.h>

volatile int x;

__attribute__((noinline))
void fn_g(int a) {
  x = a;
}

__attribute__((noinline))
void fn_f(int a) {
  fn_g(a);
}

int main(int argc, char *argv[]) {
  int volatile z;
  fn_f(z);
  return x;
}