gcc_openbsd_amd64.c

Documentation: runtime/cgo

		 1// Copyright 2009 The Go Authors. All rights reserved.
		 2// Use of this source code is governed by a BSD-style
		 3// license that can be found in the LICENSE file.
		 4
		 5#include <sys/types.h>
		 6#include <pthread.h>
		 7#include <signal.h>
		 8#include <string.h>
		 9#include "libcgo.h"
		10#include "libcgo_unix.h"
		11
		12static void* threadentry(void*);
		13static void (*setg_gcc)(void*);
		14
		15void
		16x_cgo_init(G *g, void (*setg)(void*))
		17{
		18	pthread_attr_t attr;
		19	size_t size;
		20
		21	setg_gcc = setg;
		22	pthread_attr_init(&attr);
		23	pthread_attr_getstacksize(&attr, &size);
		24	g->stacklo = (uintptr)&attr - size + 4096;
		25	pthread_attr_destroy(&attr);
		26}
		27
		28void
		29_cgo_sys_thread_start(ThreadStart *ts)
		30{
		31	pthread_attr_t attr;
		32	sigset_t ign, oset;
		33	pthread_t p;
		34	size_t size;
		35	int err;
		36
		37	sigfillset(&ign);
		38	pthread_sigmask(SIG_SETMASK, &ign, &oset);
		39
		40	pthread_attr_init(&attr);
		41	pthread_attr_getstacksize(&attr, &size);
		42
		43	// Leave stacklo=0 and set stackhi=size; mstart will do the rest.
		44	ts->g->stackhi = size;
		45	err = _cgo_try_pthread_create(&p, &attr, threadentry, ts);
		46
		47	pthread_sigmask(SIG_SETMASK, &oset, nil);
		48
		49	if (err != 0) {
		50		fprintf(stderr, "runtime/cgo: pthread_create failed: %s\n", strerror(err));
		51		abort();
		52	}
		53}
		54
		55static void*
		56threadentry(void *v)
		57{
		58	ThreadStart ts;
		59
		60	ts = *(ThreadStart*)v;
		61	free(v);
		62
		63	crosscall_amd64(ts.fn, setg_gcc, (void*)ts.g);
		64	return nil;
		65}
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