cmd/link, plugin: always encode path

Both the linker and the plugin package were inconsistent
about when they applied the path encoding defined in
objabi.PathToPrefix. As a result, only some symbols from
a package path that required encoding were being found.

So always encoding the path.

Fixes #22295

Change-Id: Ife86c79ca20b2e9307008ed83885e193d32b7dc4
Reviewed-on: https://go-review.googlesource.com/72390
Run-TryBot: David Crawshaw <crawshaw@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

1 files changed, 16 insertions, 0 deletions

diff --git a/misc/cgo/testplugin/src/issue22295.pkg/plugin.go b/misc/cgo/testplugin/src/issue22295.pkg/plugin.go
new file mode 100644
index 0000000000..46b08a405b
--- /dev/null
+++ b/misc/cgo/testplugin/src/issue22295.pkg/plugin.go
@@ -0,0 +1,16 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+var f *int
+
+func init() {
+	f = new(int)
+	*f = 2503
+}
+
+func F() int { return *f }
+
+func main() {}