mirror of https://github.com/golang/go.git
79 lines
2.0 KiB
Go
79 lines
2.0 KiB
Go
// Copyright 2009 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 base
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import (
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"os"
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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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// To enable tracing support (-t flag), set EnableTrace to true.
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const EnableTrace = false
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func Compiling(pkgs []string) bool {
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if Ctxt.Pkgpath != "" {
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for _, p := range pkgs {
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if Ctxt.Pkgpath == p {
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return true
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}
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}
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}
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return false
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}
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// The racewalk pass is currently handled in three parts.
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//
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// First, for flag_race, it inserts calls to racefuncenter and
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// racefuncexit at the start and end (respectively) of each
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// function. This is handled below.
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//
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// Second, during buildssa, it inserts appropriate instrumentation
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// calls immediately before each memory load or store. This is handled
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// by the (*state).instrument method in ssa.go, so here we just set
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// the Func.InstrumentBody flag as needed. For background on why this
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// is done during SSA construction rather than a separate SSA pass,
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// see issue #19054.
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//
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// Third we remove calls to racefuncenter and racefuncexit, for leaf
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// functions without instrumented operations. This is done as part of
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// ssa opt pass via special rule.
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// TODO(dvyukov): do not instrument initialization as writes:
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// a := make([]int, 10)
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// Do not instrument the following packages at all,
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// at best instrumentation would cause infinite recursion.
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var NoInstrumentPkgs = []string{
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"runtime/internal/atomic",
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"runtime/internal/math",
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"runtime/internal/sys",
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"runtime/internal/syscall",
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"runtime",
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"runtime/race",
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"runtime/msan",
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"runtime/asan",
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"internal/cpu",
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"buildcfg",
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}
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// Don't insert racefuncenter/racefuncexit into the following packages.
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// Memory accesses in the packages are either uninteresting or will cause false positives.
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var NoRacePkgs = []string{"sync", "sync/atomic"}
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