mirror of
https://github.com/golang/go
synced 2024-11-25 01:37:57 -07:00
50 lines
1.2 KiB
Go
50 lines
1.2 KiB
Go
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// run
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// Copyright 2014 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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// issue 7690 - Stack and other routines did not back up initial PC
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// into CALL instruction, instead reporting line number of next instruction,
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// which might be on a different line.
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package main
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import (
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"bytes"
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"regexp"
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"runtime"
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"strconv"
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)
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func main() {
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buf1 := make([]byte, 1000)
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buf2 := make([]byte, 1000)
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runtime.Stack(buf1, false) // CALL is last instruction on this line
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n := runtime.Stack(buf2, false) // CALL is followed by load of result from stack
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buf1 = buf1[:bytes.IndexByte(buf1, 0)]
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buf2 = buf2[:n]
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re := regexp.MustCompile(`(?m)^main\.main\(\)\n.*/issue7690.go:([0-9]+)`)
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m1 := re.FindStringSubmatch(string(buf1))
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if m1 == nil {
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println("BUG: cannot find main.main in first trace")
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return
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}
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m2 := re.FindStringSubmatch(string(buf2))
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if m2 == nil {
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println("BUG: cannot find main.main in second trace")
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return
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}
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n1, _ := strconv.Atoi(m1[1])
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n2, _ := strconv.Atoi(m2[1])
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if n1+1 != n2 {
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println("BUG: expect runtime.Stack on back to back lines, have", n1, n2)
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println(string(buf1))
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println(string(buf2))
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}
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}
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