From: Russ Cox <rsc@golang.org>
Date: Wed, 3 Dec 2014 19:14:00 +0000 (-0500)
Subject: cmd/pprof: fix symbol resolution for remote profiles
X-Git-Tag: go1.5beta1~2694
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=9f04a62a39133439e20ea32a658cc35c21d33729;p=gostls13.git

cmd/pprof: fix symbol resolution for remote profiles

Fixes #9199.

LGTM=iant
R=golang-codereviews, iant
CC=austin, golang-codereviews, minux
https://golang.org/cl/183080043
---

diff --git a/src/cmd/pprof/internal/symbolizer/symbolizer.go b/src/cmd/pprof/internal/symbolizer/symbolizer.go
index cabddaa76e..86de5640d2 100644
--- a/src/cmd/pprof/internal/symbolizer/symbolizer.go
+++ b/src/cmd/pprof/internal/symbolizer/symbolizer.go
@@ -32,6 +32,10 @@ func Symbolize(mode string, prof *profile.Profile, obj plugin.ObjTool, ui plugin
 		}
 	}
 
+	if len(prof.Mapping) == 0 {
+		return fmt.Errorf("no known mappings")
+	}
+
 	mt, err := newMapping(prof, obj, ui, force)
 	if err != nil {
 		return err