mirror of
https://github.com/golang/go
synced 2024-11-08 07:46:15 -07:00
c4e0e81653
Change-Id: I6265ac81e5c38b201e14ddba2d6b9f0e73d8445c Reviewed-on: https://go-review.googlesource.com/46310 Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
83 lines
1.8 KiB
C
83 lines
1.8 KiB
C
// Copyright 2009 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.
|
|
|
|
#include <sys/types.h>
|
|
#include <pthread.h>
|
|
#include <signal.h>
|
|
#include <string.h>
|
|
#include "libcgo.h"
|
|
#include "libcgo_unix.h"
|
|
|
|
static void* threadentry(void*);
|
|
static void (*setg_gcc)(void*);
|
|
|
|
void
|
|
x_cgo_init(G *g, void (*setg)(void*))
|
|
{
|
|
pthread_attr_t attr;
|
|
size_t size;
|
|
|
|
setg_gcc = setg;
|
|
pthread_attr_init(&attr);
|
|
pthread_attr_getstacksize(&attr, &size);
|
|
g->stacklo = (uintptr)&attr - size + 4096;
|
|
pthread_attr_destroy(&attr);
|
|
}
|
|
|
|
|
|
void
|
|
_cgo_sys_thread_start(ThreadStart *ts)
|
|
{
|
|
pthread_attr_t attr;
|
|
sigset_t ign, oset;
|
|
pthread_t p;
|
|
size_t size;
|
|
int err;
|
|
|
|
sigfillset(&ign);
|
|
pthread_sigmask(SIG_SETMASK, &ign, &oset);
|
|
|
|
pthread_attr_init(&attr);
|
|
pthread_attr_getstacksize(&attr, &size);
|
|
// Leave stacklo=0 and set stackhi=size; mstart will do the rest.
|
|
ts->g->stackhi = size;
|
|
err = _cgo_try_pthread_create(&p, &attr, threadentry, ts);
|
|
|
|
pthread_sigmask(SIG_SETMASK, &oset, nil);
|
|
|
|
if (err != 0) {
|
|
fprintf(stderr, "runtime/cgo: pthread_create failed: %s\n", strerror(err));
|
|
abort();
|
|
}
|
|
}
|
|
|
|
static void*
|
|
threadentry(void *v)
|
|
{
|
|
ThreadStart ts;
|
|
stack_t ss;
|
|
|
|
ts = *(ThreadStart*)v;
|
|
free(v);
|
|
|
|
/*
|
|
* Set specific keys.
|
|
*/
|
|
setg_gcc((void*)ts.g);
|
|
|
|
// On NetBSD, a new thread inherits the signal stack of the
|
|
// creating thread. That confuses minit, so we remove that
|
|
// signal stack here before calling the regular mstart. It's
|
|
// a bit baroque to remove a signal stack here only to add one
|
|
// in minit, but it's a simple change that keeps NetBSD
|
|
// working like other OS's. At this point all signals are
|
|
// blocked, so there is no race.
|
|
memset(&ss, 0, sizeof ss);
|
|
ss.ss_flags = SS_DISABLE;
|
|
sigaltstack(&ss, nil);
|
|
|
|
crosscall_386(ts.fn);
|
|
return nil;
|
|
}
|