[msan] Add one more test for the handling of stack origins.

llvm-svn: 223229

diff --git a/compiler-rt/test/msan/stack-origin2.cc b/compiler-rt/test/msan/stack-origin2.cc
new file mode 100644 (file)
index 0000000..0ba5760
--- /dev/null
+++ b/compiler-rt/test/msan/stack-origin2.cc
@@ -0,0 +1,41 @@
+// Test that on the second entry to a function the origins are still right.
+
+// RUN: %clangxx_msan -m64 -O0 %s -o %t && not %run %t >%t.out 2>&1
+// RUN: FileCheck %s < %t.out
+// RUN: %clangxx_msan -m64 -O1 %s -o %t && not %run %t >%t.out 2>&1
+// RUN: FileCheck %s < %t.out
+// RUN: %clangxx_msan -m64 -O2 %s -o %t && not %run %t >%t.out 2>&1
+// RUN: FileCheck %s < %t.out
+// RUN: %clangxx_msan -m64 -O3 %s -o %t && not %run %t >%t.out 2>&1
+// RUN: FileCheck %s < %t.out
+
+// RUN: %clangxx_msan -fsanitize-memory-track-origins -m64 -O0 %s -o %t && not %run %t >%t.out 2>&1
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-ORIGINS < %t.out
+// RUN: %clangxx_msan -fsanitize-memory-track-origins -m64 -O1 %s -o %t && not %run %t >%t.out 2>&1
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-ORIGINS < %t.out
+// RUN: %clangxx_msan -fsanitize-memory-track-origins -m64 -O2 %s -o %t && not %run %t >%t.out 2>&1
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-ORIGINS < %t.out
+// RUN: %clangxx_msan -fsanitize-memory-track-origins -m64 -O3 %s -o %t && not %run %t >%t.out 2>&1
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-ORIGINS < %t.out
+
+#include <stdlib.h>
+
+extern "C"
+int f(int depth) {
+  if (depth) return f(depth - 1);
+
+  int x;
+  int *volatile p = &x;
+  return *p;
+}
+
+int main(int argc, char **argv) {
+  return f(1);
+  // CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value
+  // CHECK: {{#0 0x.* in main .*stack-origin2.cc:}}[[@LINE-2]]
+
+  // CHECK-ORIGINS: Uninitialized value was created by an allocation of 'x' in the stack frame of function 'f'
+  // CHECK-ORIGINS: {{#0 0x.* in f .*stack-origin2.cc:}}[[@LINE-14]]
+
+  // CHECK: SUMMARY: MemorySanitizer: use-of-uninitialized-value {{.*stack-origin2.cc:.* main}}
+}