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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>
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@ -208,6 +208,7 @@ func Main() {
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flag.StringVar(&cpuprofile, "cpuprofile", "", "write cpu profile to `file`")
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flag.StringVar(&memprofile, "memprofile", "", "write memory profile to `file`")
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flag.Int64Var(&memprofilerate, "memprofilerate", 0, "set runtime.MemProfileRate to `rate`")
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flag.StringVar(&traceprofile, "traceprofile", "", "write an execution trace to `file`")
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flag.StringVar(&benchfile, "bench", "", "append benchmark times to `file`")
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obj.Flagparse(usage)
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27
src/cmd/compile/internal/gc/trace.go
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27
src/cmd/compile/internal/gc/trace.go
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@ -0,0 +1,27 @@
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// Copyright 2016 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build go1.7
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package gc
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import (
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"os"
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tracepkg "runtime/trace"
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)
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func init() {
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traceHandler = traceHandlerGo17
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}
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func traceHandlerGo17(traceprofile string) {
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f, err := os.Create(traceprofile)
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if err != nil {
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Fatalf("%v", err)
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}
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if err := tracepkg.Start(f); err != nil {
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Fatalf("%v", err)
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}
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atExit(tracepkg.Stop)
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}
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@ -33,6 +33,8 @@ var (
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cpuprofile string
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memprofile string
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memprofilerate int64
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traceprofile string
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traceHandler func(string)
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)
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func startProfile() {
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@ -61,4 +63,7 @@ func startProfile() {
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}
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})
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}
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if traceprofile != "" && traceHandler != nil {
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traceHandler(traceprofile)
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}
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}
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