1efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen// Copyright 2015 The Go Authors. All rights reserved. 2efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen// Use of this source code is governed by a BSD-style 3efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen// license that can be found in the LICENSE file. 4efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen 5efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen#include <pthread.h> 6efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen#include <string.h> 7efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen#include <signal.h> 8efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen#include <ucontext.h> 9efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen#include "libcgo.h" 10efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen#include "libcgo_unix.h" 11efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen 12efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsenstatic void* threadentry(void*); 13efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsenstatic void (*setg_gcc)(void*); 14efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen 15efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsenvoid 16efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsenx_cgo_init(G *g, void (*setg)(void*)) 17efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen{ 18efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen ucontext_t ctx; 19efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen 20efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen setg_gcc = setg; 21efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen if (getcontext(&ctx) != 0) 22efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen perror("runtime/cgo: getcontext failed"); 23efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen g->stacklo = (uintptr_t)ctx.uc_stack.ss_sp; 24efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen 25efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen // Solaris processes report a tiny stack when run with "ulimit -s unlimited". 26efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen // Correct that as best we can: assume it's at least 1 MB. 27efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen // See golang.org/issue/12210. 28efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen if(ctx.uc_stack.ss_size < 1024*1024) 29efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen g->stacklo -= 1024*1024 - ctx.uc_stack.ss_size; 30efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen} 31efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen 32efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsenvoid 33efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen_cgo_sys_thread_start(ThreadStart *ts) 34efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen{ 35efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen pthread_attr_t attr; 36efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen sigset_t ign, oset; 37efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen pthread_t p; 38efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen void *base; 39efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen size_t size; 40efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen int err; 41efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen 42efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen sigfillset(&ign); 43efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen pthread_sigmask(SIG_SETMASK, &ign, &oset); 44efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen 45efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen pthread_attr_init(&attr); 46efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen 47efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen if (pthread_attr_getstack(&attr, &base, &size) != 0) 48efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen perror("runtime/cgo: pthread_attr_getstack failed"); 49efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen if (size == 0) { 50efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen ts->g->stackhi = 2 << 20; 51efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen if (pthread_attr_setstack(&attr, NULL, ts->g->stackhi) != 0) 52efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen perror("runtime/cgo: pthread_attr_setstack failed"); 53efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen } else { 54efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen ts->g->stackhi = size; 55efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen } 56efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED); 57efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen err = _cgo_try_pthread_create(&p, &attr, threadentry, ts); 58efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen 59efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen pthread_sigmask(SIG_SETMASK, &oset, nil); 60efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen 61efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen if (err != 0) { 62efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen fprintf(stderr, "runtime/cgo: pthread_create failed: %s\n", strerror(err)); 63efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen abort(); 64efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen } 65efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen} 66efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen 67efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsenstatic void* 68efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsenthreadentry(void *v) 69efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen{ 70efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen ThreadStart ts; 71efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen 72efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen ts = *(ThreadStart*)v; 73efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen free(v); 74efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen 75efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen /* 76efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen * Set specific keys. 77efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen */ 78efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen setg_gcc((void*)ts.g); 79efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen 80efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen crosscall_amd64(ts.fn); 81efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen return nil; 82efea46b87b2dcc66da02dfbf66fd901d24c7a09Dan Willemsen} 83