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7e068895c3
Updates #15756 Updates #19822 Change-Id: I98b17dcbbfd80e7e164b0523185382175fe2d89b Reviewed-on: https://go-review.googlesource.com/39554 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
103 lines
2.2 KiB
Go
103 lines
2.2 KiB
Go
// Copyright 2015 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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package gc
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import (
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"os"
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"runtime"
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"runtime/pprof"
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)
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// Line returns n's position as a string. If n has been inlined,
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// it uses the outermost position where n has been inlined.
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func (n *Node) Line() string {
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return linestr(n.Pos)
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}
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var atExitFuncs []func()
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func atExit(f func()) {
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atExitFuncs = append(atExitFuncs, f)
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}
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func Exit(code int) {
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for i := len(atExitFuncs) - 1; i >= 0; i-- {
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f := atExitFuncs[i]
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atExitFuncs = atExitFuncs[:i]
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f()
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}
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os.Exit(code)
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}
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var (
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blockprofile string
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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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mutexprofile string
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)
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func startProfile() {
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if cpuprofile != "" {
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f, err := os.Create(cpuprofile)
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if err != nil {
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Fatalf("%v", err)
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}
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if err := pprof.StartCPUProfile(f); err != nil {
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Fatalf("%v", err)
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}
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atExit(pprof.StopCPUProfile)
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}
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if memprofile != "" {
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if memprofilerate != 0 {
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runtime.MemProfileRate = int(memprofilerate)
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}
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f, err := os.Create(memprofile)
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if err != nil {
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Fatalf("%v", err)
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}
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atExit(func() {
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// Profile all outstanding allocations.
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runtime.GC()
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// compilebench parses the memory profile to extract memstats,
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// which are only written in the legacy pprof format.
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// See golang.org/issue/18641 and runtime/pprof/pprof.go:writeHeap.
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const writeLegacyFormat = 1
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if err := pprof.Lookup("heap").WriteTo(f, writeLegacyFormat); err != nil {
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Fatalf("%v", err)
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}
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})
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} else {
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// Not doing memory profiling; disable it entirely.
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runtime.MemProfileRate = 0
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}
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if blockprofile != "" {
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f, err := os.Create(blockprofile)
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if err != nil {
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Fatalf("%v", err)
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}
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runtime.SetBlockProfileRate(1)
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atExit(func() {
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pprof.Lookup("block").WriteTo(f, 0)
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f.Close()
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})
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}
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if mutexprofile != "" {
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f, err := os.Create(mutexprofile)
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if err != nil {
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Fatalf("%v", err)
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}
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startMutexProfiling()
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atExit(func() {
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pprof.Lookup("mutex").WriteTo(f, 0)
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f.Close()
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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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