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// Copyright 2012 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 walk
import (
"cmd/compile/internal/base"
"cmd/compile/internal/ir"
"cmd/compile/internal/types"
"cmd/internal/src"
)
func instrument(fn *ir.Func) {
if fn.Pragma&ir.Norace != 0 || (fn.Linksym() != nil && fn.Linksym().ABIWrapper()) {
return
}
if !base.Flag.Race || !base.Compiling(base.NoRacePkgs) {
fn.SetInstrumentBody(true)
}
if base.Flag.Race {
lno := base.Pos
base.Pos = src.NoXPos
var init ir.Nodes
fn.Enter.Prepend(mkcallstmt("racefuncenter", mkcall("getcallerpc", types.Types[types.TUINTPTR], &init)))
if len(init) != 0 {
base.Fatalf("race walk: unexpected init for getcallerpc")
}
fn.Exit.Append(mkcallstmt("racefuncexit"))
base.Pos = lno
}
}
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