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// RUN: %clangxx_msan -fsanitize-memory-track-origins=2 -m64 -DOFFSET=0 -O3 %s -o %t && \
// RUN: not %t >%t.out 2>&1
// RUN: FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-Z1 < %t.out
// RUN: %clangxx_msan -fsanitize-memory-track-origins=2 -DOFFSET=10 -m64 -O3 %s -o %t && \
// RUN: not %t >%t.out 2>&1
// RUN: FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-Z2 < %t.out
#include <stdio.h>
#include <string.h>
int xx[10000];
int yy[10000];
volatile int idx = 30;
__attribute__((noinline))
void fn_g(int a, int b) {
xx[idx] = a; xx[idx + 10] = b;
}
__attribute__((noinline))
void fn_f(int a, int b) {
fn_g(a, b);
}
__attribute__((noinline))
void fn_h() {
memcpy(&yy, &xx, sizeof(xx));
}
int main(int argc, char *argv[]) {
int volatile z1;
int volatile z2;
fn_f(z1, z2);
fn_h();
return yy[idx + OFFSET];
}
// CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value
// CHECK: {{#0 .* in main .*chained_origin_memcpy.cc:36}}
// CHECK: Uninitialized value was stored to memory at
// CHECK: {{#1 .* in fn_h.*chained_origin_memcpy.cc:28}}
// CHECK: Uninitialized value was stored to memory at
// CHECK: {{#0 .* in fn_g.*chained_origin_memcpy.cc:18}}
// CHECK: {{#1 .* in fn_f.*chained_origin_memcpy.cc:23}}
// CHECK-Z1: Uninitialized value was created by an allocation of 'z1' in the stack frame of function 'main'
// CHECK-Z2: Uninitialized value was created by an allocation of 'z2' in the stack frame of function 'main'
// CHECK: {{#0 .* in main.*chained_origin_memcpy.cc:31}}
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