1 // RUN: %clangxx_msan -fsanitize-memory-track-origins=2 -O3 %s -o %t && \ 2 // RUN: not %run %t >%t.out 2>&1 3 // RUN: FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-STACK < %t.out 4 5 // RUN: %clangxx_msan -fsanitize-memory-track-origins=2 -DHEAP=1 -O3 %s -o %t && \ 6 // RUN: not %run %t >%t.out 2>&1 7 // RUN: FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-HEAP < %t.out 8 9 10 // RUN: %clangxx_msan -mllvm -msan-instrumentation-with-call-threshold=0 -fsanitize-memory-track-origins=2 -O3 %s -o %t && \ 11 // RUN: not %run %t >%t.out 2>&1 12 // RUN: FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-STACK < %t.out 13 14 // RUN: %clangxx_msan -mllvm -msan-instrumentation-with-call-threshold=0 -fsanitize-memory-track-origins=2 -DHEAP=1 -O3 %s -o %t && \ 15 // RUN: not %run %t >%t.out 2>&1 16 // RUN: FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-HEAP < %t.out 17 18 19 #include <stdio.h> 20 21 volatile int x, y; 22 23 __attribute__((noinline)) 24 void fn_g(int a) { 25 x = a; 26 } 27 28 __attribute__((noinline)) 29 void fn_f(int a) { 30 fn_g(a); 31 } 32 33 __attribute__((noinline)) 34 void fn_h() { 35 y = x; 36 } 37 38 int main(int argc, char *argv[]) { 39 #ifdef HEAP 40 int * volatile zz = new int; 41 int z = *zz; 42 #else 43 int volatile z; 44 #endif 45 fn_f(z); 46 fn_h(); 47 return y; 48 } 49 50 // CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value 51 // CHECK: {{#0 .* in main.*chained_origin.cc:47}} 52 53 // CHECK: Uninitialized value was stored to memory at 54 // CHECK: {{#0 .* in fn_h.*chained_origin.cc:35}} 55 // CHECK: {{#1 .* in main.*chained_origin.cc:46}} 56 57 // CHECK: Uninitialized value was stored to memory at 58 // CHECK: {{#0 .* in fn_g.*chained_origin.cc:25}} 59 // CHECK: {{#1 .* in fn_f.*chained_origin.cc:30}} 60 // CHECK: {{#2 .* in main.*chained_origin.cc:45}} 61 62 // CHECK-STACK: Uninitialized value was created by an allocation of 'z' in the stack frame of function 'main' 63 // CHECK-STACK: {{#0 .* in main.*chained_origin.cc:38}} 64 65 // CHECK-HEAP: Uninitialized value was created by a heap allocation 66 // CHECK-HEAP: {{#1 .* in main.*chained_origin.cc:40}} 67
