blob: ae72c10b6ac8d06c57a5e5f7d15aa111653bea26 (
plain) (
blame)
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
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
// RUN: %clangxx_msan -fsanitize-memory-track-origins=2 -O3 %s -o %t && \
// RUN: not %run %t >%t.out 2>&1
// RUN: FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-STACK < %t.out
// RUN: %clangxx_msan -fsanitize-memory-track-origins=2 -DHEAP=1 -O3 %s -o %t && \
// RUN: not %run %t >%t.out 2>&1
// RUN: FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-HEAP < %t.out
// RUN: %clangxx_msan -mllvm -msan-instrumentation-with-call-threshold=0 -fsanitize-memory-track-origins=2 -O3 %s -o %t && \
// RUN: not %run %t >%t.out 2>&1
// RUN: FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-STACK < %t.out
// RUN: %clangxx_msan -mllvm -msan-instrumentation-with-call-threshold=0 -fsanitize-memory-track-origins=2 -DHEAP=1 -O3 %s -o %t && \
// RUN: not %run %t >%t.out 2>&1
// RUN: FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-HEAP < %t.out
#include <stdio.h>
volatile int x, y;
__attribute__((noinline))
void fn_g(int a) {
x = a;
}
__attribute__((noinline))
void fn_f(int a) {
fn_g(a);
}
__attribute__((noinline))
void fn_h() {
y = x;
}
int main(int argc, char *argv[]) {
#ifdef HEAP
int * volatile zz = new int;
int z = *zz;
#else
int volatile z;
#endif
fn_f(z);
fn_h();
return y;
}
// CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value
// CHECK: {{#0 .* in main.*chained_origin.cc:47}}
// CHECK: Uninitialized value was stored to memory at
// CHECK: {{#0 .* in fn_h.*chained_origin.cc:35}}
// CHECK: {{#1 .* in main.*chained_origin.cc:46}}
// CHECK: Uninitialized value was stored to memory at
// CHECK: {{#0 .* in fn_g.*chained_origin.cc:25}}
// CHECK: {{#1 .* in fn_f.*chained_origin.cc:30}}
// CHECK: {{#2 .* in main.*chained_origin.cc:45}}
// CHECK-STACK: Uninitialized value was created by an allocation of 'z' in the stack frame of function 'main'
// CHECK-STACK: {{#0 .* in main.*chained_origin.cc:38}}
// CHECK-HEAP: Uninitialized value was created by a heap allocation
// CHECK-HEAP: {{#1 .* in main.*chained_origin.cc:40}}
|
