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 <pthread.h> 6 #include <string.h> // strerror 7 #include <signal.h> 8 #include "libcgo.h" 9 10 static void* threadentry(void*); 11 static void (*setg_gcc)(void*); 12 13 void 14 x_cgo_init(G* g, void (*setg)(void*)) 15 { 16 pthread_attr_t attr; 17 size_t size; 18 19 setg_gcc = setg; 20 pthread_attr_init(&attr); 21 pthread_attr_getstacksize(&attr, &size); 22 g->stacklo = (uintptr)&attr - size + 4096; 23 pthread_attr_destroy(&attr); 24 } 25 26 27 void 28 _cgo_sys_thread_start(ThreadStart *ts) 29 { 30 pthread_attr_t attr; 31 sigset_t ign, oset; 32 pthread_t p; 33 size_t size; 34 int err; 35 36 sigfillset(&ign); 37 pthread_sigmask(SIG_SETMASK, &ign, &oset); 38 39 pthread_attr_init(&attr); 40 pthread_attr_getstacksize(&attr, &size); 41 // Leave stacklo=0 and set stackhi=size; mstack will do the rest. 42 ts->g->stackhi = size; 43 err = pthread_create(&p, &attr, threadentry, ts); 44 45 pthread_sigmask(SIG_SETMASK, &oset, nil); 46 47 if (err != 0) { 48 fatalf("pthread_create failed: %s", strerror(err)); 49 } 50 } 51 52 static void* 53 threadentry(void *v) 54 { 55 ThreadStart ts; 56 57 ts = *(ThreadStart*)v; 58 free(v); 59 60 /* 61 * Set specific keys. 62 */ 63 setg_gcc((void*)ts.g); 64 65 crosscall_amd64(ts.fn); 66 return nil; 67 } 68
