1// RUN: %clangxx_msan -fsanitize-memory-track-origins=2 -DOFFSET=0 -O3 %s -o %t && \
2// RUN:     not %run %t >%t.out 2>&1
3// RUN: FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-Z1 < %t.out
4
5// RUN: %clangxx_msan -fsanitize-memory-track-origins=2 -DOFFSET=10 -O3 %s -o %t && \
6// RUN:     not %run %t >%t.out 2>&1
7// RUN: FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-Z2 < %t.out
8
9
10// RUN: %clangxx_msan -mllvm -msan-instrumentation-with-call-threshold=0 -fsanitize-memory-track-origins=2 -DOFFSET=0 -O3 %s -o %t && \
11// RUN:     not %run %t >%t.out 2>&1
12// RUN: FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-Z1 < %t.out
13
14// RUN: %clangxx_msan -mllvm -msan-instrumentation-with-call-threshold=0 -fsanitize-memory-track-origins=2 -DOFFSET=10 -O3 %s -o %t && \
15// RUN:     not %run %t >%t.out 2>&1
16// RUN: FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-Z2 < %t.out
17
18
19#include <stdio.h>
20#include <string.h>
21
22int xx[10000];
23int yy[10000];
24volatile int idx = 30;
25
26__attribute__((noinline))
27void fn_g(int a, int b) {
28  xx[idx] = a; xx[idx + 10] = b;
29}
30
31__attribute__((noinline))
32void fn_f(int a, int b) {
33  fn_g(a, b);
34}
35
36__attribute__((noinline))
37void fn_h() {
38  memcpy(&yy, &xx, sizeof(xx));
39}
40
41int main(int argc, char *argv[]) {
42  int volatile z1;
43  int volatile z2;
44  fn_f(z1, z2);
45  fn_h();
46  return yy[idx + OFFSET];
47}
48
49// CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value
50// CHECK: {{#0 .* in main .*chained_origin_memcpy.cc:46}}
51
52// CHECK: Uninitialized value was stored to memory at
53// CHECK: {{#1 .* in fn_h.*chained_origin_memcpy.cc:38}}
54
55// CHECK: Uninitialized value was stored to memory at
56// CHECK: {{#0 .* in fn_g.*chained_origin_memcpy.cc:28}}
57// CHECK: {{#1 .* in fn_f.*chained_origin_memcpy.cc:33}}
58
59// CHECK-Z1: Uninitialized value was created by an allocation of 'z1' in the stack frame of function 'main'
60// CHECK-Z2: Uninitialized value was created by an allocation of 'z2' in the stack frame of function 'main'
61// CHECK: {{#0 .* in main.*chained_origin_memcpy.cc:41}}
62