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, 8 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 3630d570b28..ddf7d92ac14 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2013-12-26  Paul Eggert  <eggert@cs.ucla.edu>
+
+        Fix core dumps with gcc -fsanitize=address and GNU/Linux.
+        * 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.
+
 2013-12-24  Paul Eggert  <eggert@cs.ucla.edu>
 
         Automate the procedure for updating copyright year.