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Text file src/runtime/cgo/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	
    12	static void* threadentry(void*);
    13	static void (*setg_gcc)(void*);
    14	
    15	void
    16	x_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	
    28	void
    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	
    55	static void*
    56	threadentry(void *v)
    57	{
    58		ThreadStart ts;
    59	
    60		ts = *(ThreadStart*)v;
    61		free(v);
    62	
    63		/*
    64		 * Set specific keys.
    65		 */
    66		setg_gcc((void*)ts.g);
    67	
    68		crosscall_amd64(ts.fn);
    69		return nil;
    70	}

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