File size: 1,302 Bytes
13c2bf6 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 | // 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.
// Tests CPU profiling.
//go:build ignore
package main
/*
#include <pthread.h>
void go_callback();
void go_callback2();
static void *thr(void *arg) {
go_callback();
return 0;
}
static void foo() {
pthread_t th;
pthread_attr_t attr;
pthread_attr_init(&attr);
pthread_attr_setstacksize(&attr, 256 << 10);
pthread_create(&th, &attr, thr, 0);
pthread_join(th, 0);
}
static void bar() {
go_callback2();
}
*/
import "C"
import (
"log"
"os"
"runtime"
"runtime/trace"
)
//export go_callback
func go_callback() {
// Do another call into C, just to test that path too.
C.bar()
}
//export go_callback2
func go_callback2() {
runtime.GC()
}
func main() {
// Start tracing.
if err := trace.Start(os.Stdout); err != nil {
log.Fatalf("failed to start tracing: %v", err)
}
// Do a whole bunch of cgocallbacks.
const n = 10
done := make(chan bool)
for i := 0; i < n; i++ {
go func() {
C.foo()
done <- true
}()
}
for i := 0; i < n; i++ {
<-done
}
// Do something to steal back any Ps from the Ms, just
// for coverage.
runtime.GC()
// End of traced execution.
trace.Stop()
}
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