cmd/compile/internal/gc: add runtime/trace support

This change adds runtime/trace support to go tool compile.

Change-Id: I6c496b9b063796123f75eba6af511c53a57c0196
Reviewed-on: https://go-review.googlesource.com/25354
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Crawshaw <crawshaw@golang.org>

1 files changed, 27 insertions, 0 deletions

diff --git a/src/cmd/compile/internal/gc/trace.go b/src/cmd/compile/internal/gc/trace.go
new file mode 100644
index 0000000000..ed4b5a268d
--- /dev/null
+++ b/src/cmd/compile/internal/gc/trace.go
@@ -0,0 +1,27 @@
+// Copyright 2016 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.
+
+// +build go1.7
+
+package gc
+
+import (
+	"os"
+	tracepkg "runtime/trace"
+)
+
+func init() {
+	traceHandler = traceHandlerGo17
+}
+
+func traceHandlerGo17(traceprofile string) {
+	f, err := os.Create(traceprofile)
+	if err != nil {
+		Fatalf("%v", err)
+	}
+	if err := tracepkg.Start(f); err != nil {
+		Fatalf("%v", err)
+	}
+	atExit(tracepkg.Stop)
+}