From 6589a7f595c970381ed3933b8b059e92e012eaa3 Mon Sep 17 00:00:00 2001
From: Todd Lipcon <todd@cloudera.com>
Date: Wed, 21 Mar 2018 15:35:17 -0700
Subject: [PATCH] symbolz: skip un-symbolizable mappings

This fixes https://github.com/google/pprof/issues/339 by skipping
attempts to symbolize anything from system mappings like [vdso],
[vsyscall], etc.
---
 internal/symbolz/symbolz.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/internal/symbolz/symbolz.go b/internal/symbolz/symbolz.go
index 086c0ccb0..6f61d88d0 100644
--- a/internal/symbolz/symbolz.go
+++ b/internal/symbolz/symbolz.go
@@ -45,6 +45,10 @@ func Symbolize(p *profile.Profile, force bool, sources plugin.MappingSources, sy
 			// Only check for HasFunctions as symbolz only populates function names.
 			continue
 		}
+		// Skip well-known system mappings
+		if m.Unsymbolizable() {
+			continue
+		}
 		mappingSources := sources[m.File]
 		if m.BuildID != "" {
 			mappingSources = append(mappingSources, sources[m.BuildID]...)