[sanitizer] Move fread and fwrite interceptors to sanitizer_common

{M, T, E}San have fread and fwrite interceptors, let's move them to sanitizer_common to enable ASan checks as well.

Differential Revision: https://reviews.llvm.org/D31456


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@299061 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 34 insertions, 0 deletions

diff --git a/test/msan/fread_fwrite.cc b/test/msan/fread_fwrite.cc
new file mode 100644
index 000000000..3d500342a
--- /dev/null
+++ b/test/msan/fread_fwrite.cc
@@ -0,0 +1,34 @@
+// RUN: %clangxx_msan -g %s -o %t
+// RUN: not %t 2>&1 | FileCheck %s
+// RUN: %t 1
+
+#include <stdio.h>
+#include <stdlib.h>
+
+int test_fread() {
+  FILE *f = fopen("/dev/zero", "r");
+  char c;
+  unsigned read = fread(&c, sizeof(c), 1, f);
+  fclose(f);
+  if (c == '1') // No error
+    return 1;
+  return 0;
+}
+
+int test_fwrite() {
+  FILE *f = fopen("/dev/null", "w");
+  char c;
+  if (fwrite(&c, sizeof(c), 1, f) != sizeof(c)) // BOOM
+    return 1;
+  return fclose(f);
+}
+
+int main(int argc, char *argv[]) {
+  if (argc > 1)
+    test_fread();
+  else
+    test_fwrite();
+  return 0;
+}
+
+// CHECK: Uninitialized bytes in __interceptor_fwrite at offset 0 inside