Charry pick libsanitizer r355488 (PR sanitizer/88684).

2019-03-06 Martin Liska <mliska@suse.cz> PR sanitizer/88684 * sanitizer_common/sanitizer_platform.h (defined): Cherry pick. (SANITIZER_NON_UNIQUE_TYPEINFO): Likewise. * ubsan/ubsan_type_hash_itanium.cc (isDerivedFromAtOffset): Likewise. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@269419 138bc75d-0d04-0410-961f-82ee72b054a4
kprobinson · Mar 6, 2019 · 8946305 · 8946305
1 parent 13825fb
commit 8946305
Show file tree

Hide file tree

Showing 3 changed files with 12 additions and 3 deletions.
diff --git a/libsanitizer/ChangeLog b/libsanitizer/ChangeLog
@@ -1,3 +1,11 @@
+2019-03-06  Martin Liska  <mliska@suse.cz>
+
+	PR sanitizer/88684
+	* sanitizer_common/sanitizer_platform.h (defined): Cherry pick.
+	(SANITIZER_NON_UNIQUE_TYPEINFO): Likewise.
+	* ubsan/ubsan_type_hash_itanium.cc (isDerivedFromAtOffset):
+	Likewise.
+
 2019-02-20  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR sanitizer/89409

diff --git a/libsanitizer/sanitizer_common/sanitizer_platform.h b/libsanitizer/sanitizer_common/sanitizer_platform.h
@@ -290,10 +290,10 @@
 # define MSC_PREREQ(version) 0
 #endif
 
-#if defined(__arm64__) && SANITIZER_IOS
-# define SANITIZER_NON_UNIQUE_TYPEINFO 1
-#else
+#if SANITIZER_MAC && !(defined(__arm64__) && SANITIZER_IOS)
 # define SANITIZER_NON_UNIQUE_TYPEINFO 0
+#else
+# define SANITIZER_NON_UNIQUE_TYPEINFO 1
 #endif
 
 // On linux, some architectures had an ABI transition from 64-bit long double

diff --git a/libsanitizer/ubsan/ubsan_type_hash_itanium.cc b/libsanitizer/ubsan/ubsan_type_hash_itanium.cc
@@ -117,6 +117,7 @@ static bool isDerivedFromAtOffset(const abi::__class_type_info *Derived,
                                   sptr Offset) {
   if (Derived->__type_name == Base->__type_name ||
       (SANITIZER_NON_UNIQUE_TYPEINFO &&
+       Derived->__type_name[0] != '*' &&
        !internal_strcmp(Derived->__type_name, Base->__type_name)))
     return Offset == 0;