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// Copyright 2022 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 gosym
import (
"strings"
sv "golang.org/x/mod/semver"
"golang.org/x/vuln/internal/semver"
)
const (
funcSymNameGo119Lower string = "go.func.*"
funcSymNameGo120 string = "go:func.*"
)
// FuncSymName returns symbol name for Go functions
// used in binaries based on Go version. Supported
// Go versions are 1.18, 1.19, and 1.20. Otherwise,
// returns an empty string.
func FuncSymName(goVersion string) string {
// Support devel goX.Y...
v := strings.TrimPrefix(goVersion, "devel ")
v = semver.GoTagToSemver(v)
mm := sv.MajorMinor(v)
if mm == "v1.18" || mm == "v1.19" {
return funcSymNameGo119Lower
} else if mm == "v1.20" {
return funcSymNameGo120
} else if v == "" && strings.HasPrefix(goVersion, "devel") {
// We currently don't have a direct way of mapping
// Go versions of the form devel <hash> to semver,
// so we map it to the most recent supported major
// Go version, which is currently go1.20.
return funcSymNameGo120
}
return ""
}
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