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59 lines
1.4 KiB
59 lines
1.4 KiB
// run
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// Copyright 2018 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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// Loads of 8 byte go.strings cannot use DS relocation
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// in case the alignment is not a multiple of 4.
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package main
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import (
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"fmt"
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)
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type Level string
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// The following are all go.strings. A link time error can
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// occur if an 8 byte load is used to load a go.string that is
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// not aligned to 4 bytes due to the type of relocation that
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// is generated for the instruction. A fix was made to avoid
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// generating an instruction with DS relocation for go.strings
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// since their alignment is not known until link time.
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// This problem only affects go.string since other types have
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// correct alignment.
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const (
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LevelBad Level = "badvals"
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LevelNone Level = "No"
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LevelMetadata Level = "Metadata"
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LevelRequest Level = "Request"
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LevelRequestResponse Level = "RequestResponse"
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)
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func ordLevel(l Level) int {
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switch l {
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case LevelMetadata:
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return 1
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case LevelRequest:
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return 2
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case LevelRequestResponse:
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return 3
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default:
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return 0
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}
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}
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//go:noinline
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func test(l Level) {
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if ordLevel(l) < ordLevel(LevelMetadata) {
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fmt.Printf("OK\n")
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}
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}
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func main() {
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test(LevelMetadata)
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}
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