[Python-checkins] Disable getc_unlocked() with MemorySanitizer. (GH-10499)

Mon Nov 12 22:47:23 EST 2018

https://github.com/python/cpython/commit/e6c77d8301ec1703abb755a7d3ce5bd8c999c082
commit: e6c77d8301ec1703abb755a7d3ce5bd8c999c082
branch: master
author: Gregory P. Smith <greg at krypto.org>
committer: GitHub <noreply at github.com>
date: 2018年11月12日T19:47:13-08:00
summary:
Disable getc_unlocked() with MemorySanitizer. (GH-10499)
clang's MemorySanitizer understand getc() but does not understand
getc_unlocked(). Workaround: Don't use it on msan builds.
files:
M Objects/fileobject.c

diff --git a/Objects/fileobject.c b/Objects/fileobject.c
index db788a9eccbb..10e8391fb479 100644
--- a/Objects/fileobject.c
+++ b/Objects/fileobject.c
@@ -3,7 +3,8 @@
 #define PY_SSIZE_T_CLEAN
 #include "Python.h"
 
-#ifdef HAVE_GETC_UNLOCKED
+#if defined(HAVE_GETC_UNLOCKED) && !defined(MEMORY_SANITIZER)
+/* clang MemorySanitizer doesn't yet understand getc_unlocked. */
 #define GETC(f) getc_unlocked(f)
 #define FLOCKFILE(f) flockfile(f)
 #define FUNLOCKFILE(f) funlockfile(f)
