compiler-rt/test/msan/stack-origin2.cpp

   1 // Test that on the second entry to a function the origins are still right.
   2
   3 // RUN: %clangxx_msan -O0 %s -o %t && not %run %t >%t.out 2>&1
   4 // RUN: FileCheck %s < %t.out
   5 // RUN: %clangxx_msan -O1 %s -o %t && not %run %t >%t.out 2>&1
   6 // RUN: FileCheck %s < %t.out
   7 // RUN: %clangxx_msan -O2 %s -o %t && not %run %t >%t.out 2>&1
   8 // RUN: FileCheck %s < %t.out
   9 // RUN: %clangxx_msan -O3 %s -o %t && not %run %t >%t.out 2>&1
  10 // RUN: FileCheck %s < %t.out
  11
  12 // RUN: %clangxx_msan -fsanitize-memory-track-origins -O0 %s -o %t && not %run %t >%t.out 2>&1
  13 // RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-ORIGINS < %t.out
  14 // RUN: %clangxx_msan -fsanitize-memory-track-origins -O1 %s -o %t && not %run %t >%t.out 2>&1
  15 // RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-ORIGINS < %t.out
  16 // RUN: %clangxx_msan -fsanitize-memory-track-origins -O2 %s -o %t && not %run %t >%t.out 2>&1
  17 // RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-ORIGINS < %t.out
  18 // RUN: %clangxx_msan -fsanitize-memory-track-origins -O3 %s -o %t && not %run %t >%t.out 2>&1
  19 // RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-ORIGINS < %t.out
  20
  21 #include <stdlib.h>
  22
  23 int t;
  24
  25 extern "C" void f(int depth) {
  26   if (depth)
  27     return f(depth - 1);
  28
  29   volatile int x;
  30   t = x;
  31 }
  32
  33 int main(int argc, char **argv) {
  34   f(1);
  35   return t;
  36   // CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value
  37   // CHECK: {{#0 0x.* in main .*stack-origin2.cpp:}}[[@LINE-2]]
  38
  39   // CHECK-ORIGINS: Uninitialized value was created by an allocation of 'x' in the stack frame
  40   // CHECK-ORIGINS: {{#0 0x.* in f .*stack-origin2.cpp:}}[[@LINE-11]]
  41
  42   // CHECK: SUMMARY: MemorySanitizer: use-of-uninitialized-value {{.*stack-origin2.cpp:.* main}}
  43 }