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// 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 <errno.h>
#include <sys/signalvar.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;
// Deal with memory sanitizer/clang interaction.
// See gcc_linux_amd64.c for details.
setg_gcc = setg;
attr = (pthread_attr_t*)malloc(sizeof *attr);
if (attr == NULL) {
fatalf("malloc failed: %s", strerror(errno));
}
pthread_attr_init(attr);
pthread_attr_getstacksize(attr, &size);
g->stacklo = (uintptr)&attr - size + 4096;
pthread_attr_destroy(attr);
free(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) {
fatalf("pthread_create failed: %s", strerror(err));
}
}
static void*
threadentry(void *v)
{
ThreadStart ts;
ts = *(ThreadStart*)v;
_cgo_tsan_acquire();
free(v);
_cgo_tsan_release();
crosscall_amd64(ts.fn, setg_gcc, (void*)ts.g);
return nil;
}
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