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// Copyright 2023 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
/*
// Defined in trace_*.c.
void cCalledFromGo(void);
*/
import "C"
import (
"context"
"fmt"
"log"
"os"
"runtime/trace"
)
func init() {
register("Trace", Trace)
}
// Trace is used by TestTraceUnwindCGO.
func Trace() {
file, err := os.CreateTemp("", "testprogcgo_trace")
if err != nil {
log.Fatalf("failed to create temp file: %s", err)
}
defer file.Close()
if err := trace.Start(file); err != nil {
log.Fatal(err)
}
defer trace.Stop()
goCalledFromGo()
<-goCalledFromCThreadChan
fmt.Printf("trace path:%s", file.Name())
}
// goCalledFromGo calls cCalledFromGo which calls back into goCalledFromC and
// goCalledFromCThread.
func goCalledFromGo() {
C.cCalledFromGo()
}
//export goCalledFromC
func goCalledFromC() {
trace.Log(context.Background(), "goCalledFromC", "")
}
var goCalledFromCThreadChan = make(chan struct{})
//export goCalledFromCThread
func goCalledFromCThread() {
trace.Log(context.Background(), "goCalledFromCThread", "")
close(goCalledFromCThreadChan)
}
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