chained_origin.cpp
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// 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-%short-stack --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-%short-stack --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-%short-stack --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.cpp:}}[[@LINE-4]]
// CHECK: Uninitialized value was stored to memory at
// CHECK-FULL-STACK: {{#0 .* in fn_h.*chained_origin.cpp:}}[[@LINE-19]]
// CHECK-FULL-STACK: {{#1 .* in main.*chained_origin.cpp:}}[[@LINE-9]]
// CHECK-SHORT-STACK: {{#0 .* in fn_h.*chained_origin.cpp:}}[[@LINE-21]]
// CHECK: Uninitialized value was stored to memory at
// CHECK-FULL-STACK: {{#0 .* in fn_g.*chained_origin.cpp:}}[[@LINE-34]]
// CHECK-FULL-STACK: {{#1 .* in fn_f.*chained_origin.cpp:}}[[@LINE-30]]
// CHECK-FULL-STACK: {{#2 .* in main.*chained_origin.cpp:}}[[@LINE-16]]
// CHECK-SHORT-STACK: {{#0 .* in fn_g.*chained_origin.cpp:}}[[@LINE-37]]
// 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.cpp:}}[[@LINE-27]]
// CHECK-HEAP: Uninitialized value was created by a heap allocation
// CHECK-HEAP: {{#1 .* in main.*chained_origin.cpp:}}[[@LINE-28]]