From: Jan Kratochvil <jan.kratochvil@redhat.com>
Date: Mon, 8 Oct 2012 21:51:31 +0000 (+0200)
Subject: lib/
X-Git-Tag: elfutils-0.156~82
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1d67c0c87a56349f7a0169e6bef6385696d86af2;p=thirdparty%2Felfutils.git

lib/
system.h (eu_static_assert): New macro.

libdw/
cfi.c: New include system.h.
(execute_cfi) (enough_registers): Clear new memory after realloc.

Signed-off-by: Jan Kratochvil <jan.kratochvil@redhat.com>
---

diff --git a/lib/ChangeLog b/lib/ChangeLog
index 47e831ea8..46eeeca05 100644
--- a/lib/ChangeLog
+++ b/lib/ChangeLog
@@ -1,3 +1,7 @@
+2012-10-08  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	* system.h (eu_static_assert): New macro.
+
 2012-01-21  Ulrich Drepper  <drepper@gmail.com>
 
 	* Makefile.am (libeu_a_SOURCES): Add color.c.
diff --git a/lib/system.h b/lib/system.h
index 9ac01f894..d9adee9c2 100644
--- a/lib/system.h
+++ b/lib/system.h
@@ -121,4 +121,11 @@ extern char *color_weak;
 
 extern const char color_off[];
 
+/* A static assertion.  This will cause a compile-time error if EXPR,
+   which must be a compile-time constant, is false.  */
+
+#define eu_static_assert(expr)						\
+  extern int never_defined_just_used_for_checking[(expr) ? 1 : -1]	\
+    __attribute__ ((unused))
+
 #endif /* system.h */
diff --git a/libdw/ChangeLog b/libdw/ChangeLog
index 0d2d5f113..7db34ea5d 100644
--- a/libdw/ChangeLog
+++ b/libdw/ChangeLog
@@ -1,3 +1,8 @@
+2012-10-08  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	* cfi.c: New include system.h.
+	(execute_cfi) (enough_registers): Clear new memory after realloc.
+
 2012-10-08  Jan Kratochvil  <jan.kratochvil@redhat.com>
 
 	* fde.c (__libdw_find_fde): Change <fde != NULL> to likely.  Return
diff --git a/libdw/cfi.c b/libdw/cfi.c
index f59f17d61..b1e8d4858 100644
--- a/libdw/cfi.c
+++ b/libdw/cfi.c
@@ -35,6 +35,7 @@
 #include "cfi.h"
 #include "memory-access.h"
 #include "encoded-value.h"
+#include "system.h"
 #include <assert.h>
 #include <stdlib.h>
 #include <string.h>
@@ -89,6 +90,9 @@ execute_cfi (Dwarf_CFI *cache,
 	    }
 	  else
 	    {
+	      eu_static_assert (reg_unspecified == 0);
+	      memset (bigger->regs + bigger->nregs, 0,
+		      (reg + 1 - bigger->nregs) * sizeof bigger->regs[0]);
 	      bigger->nregs = reg + 1;
 	      fs = bigger;
 	    }