github.com/ice-blockchain/go/src@v0.0.0-20240403114104-1564d284e521/runtime/cgo/gcc_linux.c (about)

     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  //go:build linux && (386 || arm || loong64 || mips || mipsle || mips64 || mips64le || riscv64)
     6  
     7  #include <pthread.h>
     8  #include <string.h>
     9  #include <signal.h>
    10  #include "libcgo.h"
    11  #include "libcgo_unix.h"
    12  
    13  static void *threadentry(void*);
    14  
    15  void (*x_cgo_inittls)(void **tlsg, void **tlsbase) __attribute__((common));
    16  static void (*setg_gcc)(void*);
    17  
    18  void
    19  x_cgo_init(G *g, void (*setg)(void*), void **tlsg, void **tlsbase)
    20  {
    21  	setg_gcc = setg;
    22  
    23  	_cgo_set_stacklo(g, NULL);
    24  
    25  	if (x_cgo_inittls) {
    26  		x_cgo_inittls(tlsg, tlsbase);
    27  	}
    28  }
    29  
    30  void
    31  _cgo_sys_thread_start(ThreadStart *ts)
    32  {
    33  	pthread_attr_t attr;
    34  	sigset_t ign, oset;
    35  	pthread_t p;
    36  	size_t size;
    37  	int err;
    38  
    39  	sigfillset(&ign);
    40  	pthread_sigmask(SIG_SETMASK, &ign, &oset);
    41  
    42  	pthread_attr_init(&attr);
    43  	pthread_attr_getstacksize(&attr, &size);
    44  	// Leave stacklo=0 and set stackhi=size; mstart will do the rest.
    45  	ts->g->stackhi = size;
    46  	err = _cgo_try_pthread_create(&p, &attr, threadentry, ts);
    47  
    48  	pthread_sigmask(SIG_SETMASK, &oset, nil);
    49  
    50  	if (err != 0) {
    51  		fatalf("pthread_create failed: %s", strerror(err));
    52  	}
    53  }
    54  
    55  extern void crosscall1(void (*fn)(void), void (*setg_gcc)(void*), void *g);
    56  static void*
    57  threadentry(void *v)
    58  {
    59  	ThreadStart ts;
    60  
    61  	ts = *(ThreadStart*)v;
    62  	free(v);
    63  
    64  	crosscall1(ts.fn, setg_gcc, ts.g);
    65  	return nil;
    66  }