1 // Copyright 2013 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 11 static void *threadentry(void*); 12 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 29 void 30 _cgo_sys_thread_start(ThreadStart *ts) 31 { 32 pthread_attr_t attr; 33 sigset_t ign, oset; 34 pthread_t p; 35 size_t size; 36 int err; 37 38 sigfillset(&ign); 39 pthread_sigmask(SIG_SETMASK, &ign, &oset); 40 41 pthread_attr_init(&attr); 42 pthread_attr_getstacksize(&attr, &size); 43 // Leave stacklo=0 and set stackhi=size; mstack will do the rest. 44 ts->g->stackhi = size; 45 err = 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 extern void crosscall_arm1(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 crosscall_arm1(ts.fn, setg_gcc, (void*)ts.g); 65 return nil; 66 } 67
