github.com/peggyl/go@v0.0.0-20151008231540-ae315999c2d5/src/runtime/cgo/gcc_solaris_amd64.c (about)

     1  // Copyright 2015 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 <pthread.h>
     6  #include <string.h>
     7  #include <signal.h>
     8  #include <ucontext.h>
     9  #include "libcgo.h"
    10  
    11  static void* threadentry(void*);
    12  static void (*setg_gcc)(void*);
    13  
    14  void
    15  x_cgo_init(G *g, void (*setg)(void*))
    16  {
    17  	ucontext_t ctx;
    18  
    19  	setg_gcc = setg;
    20  	if (getcontext(&ctx) != 0)
    21  		perror("runtime/cgo: getcontext failed");
    22  	g->stacklo = (uintptr_t)ctx.uc_stack.ss_sp;
    23  }
    24  
    25  void
    26  _cgo_sys_thread_start(ThreadStart *ts)
    27  {
    28  	pthread_attr_t attr;
    29  	sigset_t ign, oset;
    30  	pthread_t p;
    31  	void *base;
    32  	size_t size;
    33  	int err;
    34  
    35  	sigfillset(&ign);
    36  	pthread_sigmask(SIG_SETMASK, &ign, &oset);
    37  
    38  	pthread_attr_init(&attr);
    39  
    40  	if (pthread_attr_getstack(&attr, &base, &size) != 0)
    41  		perror("runtime/cgo: pthread_attr_getstack failed");
    42  	if (size == 0) {
    43  		ts->g->stackhi = 2 << 20;
    44  		if (pthread_attr_setstack(&attr, NULL, ts->g->stackhi) != 0)
    45  			perror("runtime/cgo: pthread_attr_setstack failed");
    46  	} else {
    47  		ts->g->stackhi = size;
    48  	}
    49  	pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
    50  	err = pthread_create(&p, &attr, threadentry, ts);
    51  
    52  	pthread_sigmask(SIG_SETMASK, &oset, nil);
    53  
    54  	if (err != 0) {
    55  		fprintf(stderr, "runtime/cgo: pthread_create failed: %s\n", strerror(err));
    56  		abort();
    57  	}
    58  }
    59  
    60  static void*
    61  threadentry(void *v)
    62  {
    63  	ThreadStart ts;
    64  
    65  	ts = *(ThreadStart*)v;
    66  	free(v);
    67  
    68  	/*
    69  	 * Set specific keys.
    70  	 */
    71  	setg_gcc((void*)ts.g);
    72  
    73  	crosscall_amd64(ts.fn);
    74  	return nil;
    75  }