+++ /dev/null
-// 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
-
-// This program failed when run under the C/C++ ThreadSanitizer.
-// There was no TSAN synchronization for the call to the cgo
-// traceback routine.
-
-/*
-#cgo CFLAGS: -g -fsanitize=thread
-#cgo LDFLAGS: -g -fsanitize=thread
-
-#include <pthread.h>
-#include <stdint.h>
-#include <stdlib.h>
-#include <sys/time.h>
-#include <unistd.h>
-
-struct tracebackArg {
- uintptr_t Context;
- uintptr_t SigContext;
- uintptr_t* Buf;
- uintptr_t Max;
-};
-
-void tsanTraceback(struct tracebackArg *arg) {
- arg->Buf[0] = 0;
-}
-
-static void* spin(void *arg) {
- size_t n;
- struct timeval tvstart, tvnow;
- int diff;
- void *prev;
- void *cur;
-
- prev = NULL;
- gettimeofday(&tvstart, NULL);
- for (n = 0; n < 1<<20; n++) {
- cur = malloc(n);
- free(prev);
- prev = cur;
-
- gettimeofday(&tvnow, NULL);
- diff = (tvnow.tv_sec - tvstart.tv_sec) * 1000 * 1000 + (tvnow.tv_usec - tvstart.tv_usec);
-
- // Profile frequency is 100Hz so we should definitely
- // get some signals in 50 milliseconds.
- if (diff > 50 * 1000) {
- break;
- }
- }
-
- free(prev);
-
- return NULL;
-}
-
-static void runThreads(int n) {
- pthread_t ids[64];
- int i;
-
- if (n > 64) {
- n = 64;
- }
- for (i = 0; i < n; i++) {
- pthread_create(&ids[i], NULL, spin, NULL);
- }
- for (i = 0; i < n; i++) {
- pthread_join(ids[i], NULL);
- }
-}
-*/
-import "C"
-
-import (
- "io"
- "runtime"
- "runtime/pprof"
- "unsafe"
-)
-
-func main() {
- runtime.SetCgoTraceback(0, unsafe.Pointer(C.tsanTraceback), nil, nil)
- pprof.StartCPUProfile(io.Discard)
- C.runThreads(C.int(runtime.GOMAXPROCS(0)))
- pprof.StopCPUProfile()
-}