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https://github.com/golang/go
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9ee6ba089d
Unlike function calls, when processing instructions that directly fault we must not subtract 1 from the pc before looking up the file/line information. Since the file/line lookup unconditionally subtracts 1, add 1 to the faulting instruction PCs to compensate. Fixes #34123 Change-Id: Ie7361e3d2f84a0d4f48d97e5a9e74f6291ba7a8b Reviewed-on: https://go-review.googlesource.com/c/go/+/196962 Run-TryBot: Keith Randall <khr@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
44 lines
735 B
Go
44 lines
735 B
Go
// run
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// Copyright 2019 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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// Make sure that the line number is reported correctly
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// for faulting instructions.
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package main
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import (
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"fmt"
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"runtime"
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)
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var x byte
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var p *byte
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//go:noinline
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func f() {
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q := p
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x = 11 // line 23
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*q = 12 // line 24
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}
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func main() {
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defer func() {
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recover()
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var pcs [10]uintptr
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n := runtime.Callers(1, pcs[:])
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frames := runtime.CallersFrames(pcs[:n])
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for {
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f, more := frames.Next()
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if f.Function == "main.f" && f.Line != 24 {
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panic(fmt.Errorf("expected line 24, got line %d", f.Line))
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}
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if !more {
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break
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}
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}
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}()
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f()
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}
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