From 0d1b033387342e34b9d3a973dfe40d31dc1a07b4 Mon Sep 17 00:00:00 2001
From: Jan Kratochvil <jan.kratochvil@redhat.com>
Date: Wed, 29 Jun 2011 20:51:10 +0000
Subject: [PATCH] readline/ 	Avoid free from a signal handler. 	*
 Makefile.in (xfree.o): Add readline.h. 	* xfree.c: Include stdio.h and
 readline.h. 	(xfree): Return on RL_STATE_SIGHANDLER. 	* xmalloc.h
 (xfree): New definition.

---
 readline/ChangeLog.gdb | 8 ++++++++
 readline/Makefile.in   | 2 +-
 readline/xfree.c       | 7 +++++++
 readline/xmalloc.h     | 3 +++
 4 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/readline/ChangeLog.gdb b/readline/ChangeLog.gdb
index 22766a40fc3..229aa31e9d4 100644
--- a/readline/ChangeLog.gdb
+++ b/readline/ChangeLog.gdb
@@ -1,3 +1,11 @@
+2011-06-29  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	Avoid free from a signal handler.
+	* Makefile.in (xfree.o): Add readline.h.
+	* xfree.c: Include stdio.h and readline.h.
+	(xfree): Return on RL_STATE_SIGHANDLER.
+	* xmalloc.h (xfree): New definition.
+
 2011-05-11  Jan Kratochvil  <jan.kratochvil@redhat.com>
 
 	Workaround gdb.base/completion.exp regression on readline-6.2.
diff --git a/readline/Makefile.in b/readline/Makefile.in
index 23194306bc1..f4ed8110a29 100644
--- a/readline/Makefile.in
+++ b/readline/Makefile.in
@@ -422,7 +422,7 @@ vi_mode.o: rldefs.h ${BUILD_DIR}/config.h rlconf.h
 vi_mode.o: readline.h keymaps.h rltypedefs.h chardefs.h tilde.h
 vi_mode.o: history.h ansi_stdlib.h rlstdc.h
 xfree.o: ${BUILD_DIR}/config.h
-xfree.o: ansi_stdlib.h
+xfree.o: ansi_stdlib.h readline.h
 xmalloc.o: ${BUILD_DIR}/config.h
 xmalloc.o: ansi_stdlib.h
 
diff --git a/readline/xfree.c b/readline/xfree.c
index 37a81e6c236..d3af7d9aef0 100644
--- a/readline/xfree.c
+++ b/readline/xfree.c
@@ -31,7 +31,10 @@
 #  include "ansi_stdlib.h"
 #endif /* HAVE_STDLIB_H */
 
+#include <stdio.h>
+
 #include "xmalloc.h"
+#include "readline.h"
 
 /* **************************************************************** */
 /*								    */
@@ -45,6 +48,10 @@ void
 xfree (string)
      PTR_T string;
 {
+  /* Leak a bit.  */
+  if (RL_ISSTATE(RL_STATE_SIGHANDLER))
+    return;
+
   if (string)
     free (string);
 }
diff --git a/readline/xmalloc.h b/readline/xmalloc.h
index f40d7a596a2..0fb6a1960e1 100644
--- a/readline/xmalloc.h
+++ b/readline/xmalloc.h
@@ -38,6 +38,9 @@
 
 #endif /* !PTR_T */
 
+/* xmalloc and xrealloc should be also protected from RL_STATE_SIGHANDLER.  */
+#define xfree xfree_readline
+
 extern PTR_T xmalloc PARAMS((size_t));
 extern PTR_T xrealloc PARAMS((void *, size_t));
 extern void xfree PARAMS((void *));
-- 
2.30.2