mirror of
https://github.com/golang/go
synced 2024-11-05 22:26:10 -07:00
956879dd0b
Returning the innermost frame instead of the outermost
makes code that walks the results of runtime.Caller{,s}
still work correctly in the presence of mid-stack inlining.
Fixes #29582
Change-Id: I2392e3dd5636eb8c6f58620a61cef2194fe660a7
Reviewed-on: https://go-review.googlesource.com/c/156364
Run-TryBot: Keith Randall <khr@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
96 lines
1.9 KiB
Go
96 lines
1.9 KiB
Go
// run -gcflags=-l=4
|
|
|
|
// Copyright 2017 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 main
|
|
|
|
import (
|
|
"fmt"
|
|
"runtime"
|
|
)
|
|
|
|
var skip int
|
|
var npcs int
|
|
var pcs = make([]uintptr, 32)
|
|
|
|
func f() {
|
|
g()
|
|
}
|
|
|
|
func g() {
|
|
h()
|
|
}
|
|
|
|
func h() {
|
|
npcs = runtime.Callers(skip, pcs)
|
|
}
|
|
|
|
func testCallers(skp int) (frames []string) {
|
|
skip = skp
|
|
f()
|
|
for i := 0; i < npcs; i++ {
|
|
fn := runtime.FuncForPC(pcs[i] - 1)
|
|
frames = append(frames, fn.Name())
|
|
if fn.Name() == "main.main" {
|
|
break
|
|
}
|
|
}
|
|
return
|
|
}
|
|
|
|
func testCallersFrames(skp int) (frames []string) {
|
|
skip = skp
|
|
f()
|
|
callers := pcs[:npcs]
|
|
ci := runtime.CallersFrames(callers)
|
|
for {
|
|
frame, more := ci.Next()
|
|
frames = append(frames, frame.Function)
|
|
if !more || frame.Function == "main.main" {
|
|
break
|
|
}
|
|
}
|
|
return
|
|
}
|
|
|
|
var expectedFrames [][]string = [][]string{
|
|
0: {"runtime.Callers", "main.h", "main.g", "main.f", "main.testCallers", "main.main"},
|
|
1: {"main.h", "main.g", "main.f", "main.testCallers", "main.main"},
|
|
2: {"main.g", "main.f", "main.testCallers", "main.main"},
|
|
3: {"main.f", "main.testCallers", "main.main"},
|
|
4: {"main.testCallers", "main.main"},
|
|
5: {"main.main"},
|
|
}
|
|
|
|
var allFrames = []string{"runtime.Callers", "main.h", "main.g", "main.f", "main.testCallersFrames", "main.main"}
|
|
|
|
func same(xs, ys []string) bool {
|
|
if len(xs) != len(ys) {
|
|
return false
|
|
}
|
|
for i := range xs {
|
|
if xs[i] != ys[i] {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
func main() {
|
|
for i := 0; i <= 5; i++ {
|
|
frames := testCallers(i)
|
|
expected := expectedFrames[i]
|
|
if !same(frames, expected) {
|
|
fmt.Printf("testCallers(%d):\n got %v\n want %v\n", i, frames, expected)
|
|
}
|
|
|
|
frames = testCallersFrames(i)
|
|
expected = allFrames[i:]
|
|
if !same(frames, expected) {
|
|
fmt.Printf("testCallersFrames(%d):\n got %v\n want %v\n", i, frames, expected)
|
|
}
|
|
}
|
|
}
|