Fix core dumps with gcc -fsanitize=address and GNU/Linux.

On my Fedora 19 platform the core dumps were so big that
my desktop became nearly catatonic.
* configure.ac: Check whether addresses are sanitized.
(CANNOT_DUMP): Warn if addresses are sanitized and not CANNOT_DUMP.
(DOUG_LEA_MALLOC): Do not define if addresses are sanitized.
(SYSTEM_MALLOC): Define if addresses are sanitized.
* src/alloc.c (no_sanitize_memcpy) [MAX_SAVE_STACK > 0]: New function.
(Fgarbage_collect) [MAX_SAVE_STACK > 0]: Use it.
(USE_ALIGNED_MALLOC): Do not define if addresses are sanitized.
(mark_memory): Use ATTRIBUTE_NO_SANITIZE_ADDRESS rather than
a clang-only syntax.
* src/conf_post.h (__has_feature): New macro, if not already defined.
(ADDRESS_SANITIZER, ADDRESS_SANITIZER_WORKAROUND)
(ATTRIBUTE_NO_SANITIZE_ADDRESS): New macros.

1 files changed, 14 insertions, 0 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 1e8684c4ddb..70df9cd3641 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,17 @@
+2013-12-26  Paul Eggert  <eggert@cs.ucla.edu>
+
+        Fix core dumps with gcc -fsanitize=address and GNU/Linux.
+        On my Fedora 19 platform the core dumps were so big that
+        my desktop became nearly catatonic.
+        * alloc.c (no_sanitize_memcpy) [MAX_SAVE_STACK > 0]: New function.
+        (Fgarbage_collect) [MAX_SAVE_STACK > 0]: Use it.
+        (USE_ALIGNED_MALLOC): Do not define if addresses are sanitized.
+        (mark_memory): Use ATTRIBUTE_NO_SANITIZE_ADDRESS rather than
+        a clang-only syntax.
+        * conf_post.h (__has_feature): New macro, if not already defined.
+        (ADDRESS_SANITIZER, ADDRESS_SANITIZER_WORKAROUND)
+        (ATTRIBUTE_NO_SANITIZE_ADDRESS): New macros.
+
 2013-12-25  Eli Zaretskii  <eliz@gnu.org>
 
         * w32fns.c (Fw32_shell_execute): Make DOCUMENT absolute only if it