diff options
Diffstat (limited to 'src/runtime/testdata')
| -rw-r--r-- | src/runtime/testdata/testprogcgo/threadprof.go | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/src/runtime/testdata/testprogcgo/threadprof.go b/src/runtime/testdata/testprogcgo/threadprof.go index 8081173c0f..d62d4b4be8 100644 --- a/src/runtime/testdata/testprogcgo/threadprof.go +++ b/src/runtime/testdata/testprogcgo/threadprof.go @@ -2,21 +2,22 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// We only build this file with the tag "threadprof", since it starts -// a thread running a busy loop at constructor time. - -//go:build !plan9 && !windows && threadprof -// +build !plan9,!windows,threadprof +//go:build !plan9 && !windows +// +build !plan9,!windows package main /* #include <stdint.h> +#include <stdlib.h> #include <signal.h> #include <pthread.h> volatile int32_t spinlock; +// Note that this thread is only started if GO_START_SIGPROF_THREAD +// is set in the environment, which is only done when running the +// CgoExternalThreadSIGPROF test. static void *thread1(void *p) { (void)p; while (spinlock == 0) @@ -26,9 +27,13 @@ static void *thread1(void *p) { return NULL; } +// This constructor function is run when the program starts. +// It is used for the CgoExternalThreadSIGPROF test. __attribute__((constructor)) void issue9456() { - pthread_t tid; - pthread_create(&tid, 0, thread1, NULL); + if (getenv("GO_START_SIGPROF_THREAD") != NULL) { + pthread_t tid; + pthread_create(&tid, 0, thread1, NULL); + } } void **nullptr; |