From: Rob Pike <r@golang.org>
Date: Mon, 14 Jul 2008 23:00:44 +0000 (-0700)
Subject: stop traceback when pc leaves text segment
X-Git-Tag: weekly.2009-11-06~3503
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=bad8c3d5dd57086b5c971271fc049976748feb1f;p=gostls13.git

stop traceback when pc leaves text segment

SVN=127088
---

diff --git a/src/runtime/rt2_amd64.c b/src/runtime/rt2_amd64.c
index a5f5d109a9..91bef54340 100644
--- a/src/runtime/rt2_amd64.c
+++ b/src/runtime/rt2_amd64.c
@@ -8,6 +8,8 @@ extern int32	debug;
 
 static int8 spmark[] = "\xa7\xf1\xd9\x2a\x82\xc8\xd8\xfe";
 
+extern uint8 end;
+
 void
 traceback(uint8 *pc, uint8 *sp, void* r15)
 {
@@ -39,6 +41,8 @@ traceback(uint8 *pc, uint8 *sp, void* r15)
 		}
 		/* find SP offset by stepping back through instructions to SP offset marker */
 		while(pc > (uint8*)0x1000+sizeof spmark-1) {
+			if(pc >= &end)
+				return;
 			for(spp = spmark; *spp != '\0' && *pc++ == (uint8)*spp++; )
 				;
 			if(*spp == '\0'){