From: Russ Cox <rsc@golang.org>
Date: Mon, 6 Feb 2012 16:24:14 +0000 (-0500)
Subject: runtime: use GOTRACEBACK to decide whether to show runtime frames
X-Git-Tag: weekly.2012-02-07~42
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=48bd13911de978effd30402253de523b8eb4bb11;p=gostls13.git

runtime: use GOTRACEBACK to decide whether to show runtime frames

Right now, GOTRACEBACK=0 means do not show any stack traces.
Unset means the default behavior (declutter by hiding runtime routines).

This CL makes GOTRACEBACK=2 mean include the runtime routines.
It avoids having to recompile the runtime when you want to see
the runtime in the tracebacks.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5633050
---

diff --git a/src/pkg/runtime/symtab.c b/src/pkg/runtime/symtab.c
index 0346a420b5..df4c9ad76c 100644
--- a/src/pkg/runtime/symtab.c
+++ b/src/pkg/runtime/symtab.c
@@ -507,6 +507,9 @@ contains(String s, int8 *p)
 bool
 runtime·showframe(Func *f)
 {
-	// return 1;  // for debugging - show all frames
-	return contains(f->name, ".") && !hasprefix(f->name, "runtime.");
+	static int32 traceback = -1;
+	
+	if(traceback < 0)
+		traceback = runtime·gotraceback();
+	return traceback > 1 || contains(f->name, ".") && !hasprefix(f->name, "runtime.");
 }