[msan] Fix a typo and enable poison_in_free flag.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@193529 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 17 insertions, 1 deletions

diff --git a/lib/msan/lit_tests/poison_in_free.cc b/lib/msan/lit_tests/poison_in_free.cc
new file mode 100644
index 00000000..f134d05a
--- /dev/null
+++ b/lib/msan/lit_tests/poison_in_free.cc
@@ -0,0 +1,16 @@
+// RUN: %clangxx_msan -O0 %s -o %t && not %t >%t.out 2>&1
+// FileCheck %s <%t.out
+// RUN: %clangxx_msan -O0 %s -o %t && MSAN_OPTIONS=poison_in_free=0 %t >%t.out 2>&1
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+int main(int argc, char **argv) {
+  char *volatile x = (char*)malloc(50 * sizeof(char));
+  memset(x, 0, 50);
+  free(x);
+  return x[25];
+  // CHECK: MemorySanitizer: use-of-uninitialized-value
+  // CHECK: #0 {{.*}} in main{{.*}}poison_in_free.cc:[[@LINE-2]]
+}
diff --git a/lib/msan/msan.cc b/lib/msan/msan.cc
index 7865044c..92384315 100644
--- a/lib/msan/msan.cc
+++ b/lib/msan/msan.cc
@@ -122,7 +122,7 @@ static void ParseFlagsFromString(Flags *f, const char *str) {
   ParseFlag(str, &f->poison_heap_with_zeroes, "poison_heap_with_zeroes");
   ParseFlag(str, &f->poison_stack_with_zeroes, "poison_stack_with_zeroes");
   ParseFlag(str, &f->poison_in_malloc, "poison_in_malloc");
-  ParseFlag(str, &f->poison_in_malloc, "poison_in_free");
+  ParseFlag(str, &f->poison_in_free, "poison_in_free");
   ParseFlag(str, &f->exit_code, "exit_code");
   if (f->exit_code < 0 || f->exit_code > 127) {
     Printf("Exit code not in [0, 128) range: %d\n", f->exit_code);