ikarus/src/ikarus-main.c

195 lines
5.1 KiB
C

/*
* Ikarus Scheme -- A compiler for R6RS Scheme.
* Copyright (C) 2006,2007,2008 Abdulaziz Ghuloum
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "bootfileloc.h"
#include "ikarus-data.h"
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <errno.h>
#include <gmp.h>
#include <signal.h>
#include <sys/mman.h>
void register_handlers();
void register_alt_stack();
ikpcb* the_pcb;
int
file_exists(char* filename){
struct stat sb;
int s = stat(filename, &sb);
return (s == 0);
}
extern int cpu_has_sse2();
int ikarus_main(int argc, char** argv, char* boot_file){
if(! cpu_has_sse2()){
fprintf(stderr, "Ikarus Scheme cannot run on your computer because\n");
fprintf(stderr, "your CPU does not support the SSE2 instruction set.\n");
fprintf(stderr, "Refer to the Ikarus Scheme User's Guide for the\n");
fprintf(stderr, "minimum hardware requirements.\n");
exit(-1);
}
if(sizeof(mp_limb_t) != sizeof(long int)){
fprintf(stderr, "ERROR: limb size does not match\n");
exit(-1);
}
if(mp_bits_per_limb != (8*sizeof(long int))){
fprintf(stderr, "ERROR: invalid bits_per_limb=%d\n", mp_bits_per_limb);
exit(-1);
}
ikpcb* pcb = ik_make_pcb();
the_pcb = pcb;
{ /* set up arg_list */
ikptr arg_list = null_object;
int i = argc-1;
while(i > 0){
char* s = argv[i];
int n = strlen(s);
ikptr bv = ik_unsafe_alloc(pcb, align(disp_bytevector_data+n+1))
+ bytevector_tag;
ref(bv, off_bytevector_length) = fix(n);
memcpy((char*)(bv+off_bytevector_data), s, n+1);
ikptr p = ik_unsafe_alloc(pcb, pair_size);
ref(p, disp_car) = bv;
ref(p, disp_cdr) = arg_list;
arg_list = p+pair_tag;
i--;
}
pcb->arg_list = arg_list;
}
register_handlers();
register_alt_stack();
ik_fasl_load(pcb, boot_file);
/*
fprintf(stderr, "collect time: %d.%03d utime, %d.%03d stime (%d collections)\n",
pcb->collect_utime.tv_sec,
pcb->collect_utime.tv_usec/1000,
pcb->collect_stime.tv_sec,
pcb->collect_stime.tv_usec/1000,
pcb->collection_id );
*/
ik_delete_pcb(pcb);
return 0;
}
#if 0
Notice how the bsd manpages have incorrect type for the handler.
#include <signal.h>
struct sigaction {
union {
void (*__sa_handler)(int);
void (*__sa_sigaction)(int, struct __siginfo *, void *);
} __sigaction_u; /* signal handler */
int sa_flags; /* see signal options below */
sigset_t sa_mask; /* signal mask to apply */
};
#define sa_handler __sigaction_u.__sa_handler
#define sa_sigaction __sigaction_u.__sa_sigaction
int
sigaction(int sig, const struct sigaction * restrict act,
struct sigaction * restrict oact);
#endif
void handler(int signo, siginfo_t* info, void* uap){
signo=signo; info=info; uap=uap; /* no warning */
the_pcb->engine_counter = fix(-1);
the_pcb->interrupted = 1;
}
void
register_handlers(){
struct sigaction sa;
sa.sa_sigaction = handler;
#ifdef __CYGWIN__
sa.sa_flags = SA_SIGINFO;
#else
sa.sa_flags = SA_SIGINFO | SA_ONSTACK;
#endif
sigemptyset(&sa.sa_mask);
int err = sigaction(SIGINT, &sa, 0);
if(err){
fprintf(stderr, "Sigaction Failed: %s\n", strerror(errno));
exit(-1);
}
/* ignore sigpipes */
{
sigset_t set;
sigprocmask(0, 0, &set); /* get the set */
sigaddset(&set, SIGPIPE);
int err = sigprocmask(SIG_SETMASK, &set, &set);
if(err){
fprintf(stderr, "Sigprocmask Failed: %s\n", strerror(errno));
exit(-1);
}
}
}
#if 0
SYNOPSIS
#include <sys/types.h>
#include <signal.h>
struct sigaltstack {
char *ss_sp;
int ss_size;
int ss_flags;
};
int
sigaltstack(const struct sigaltstack *ss, struct sigaltstack *oss);
#endif
void
register_alt_stack(){
#if HAVE_SIGALTSTACK
char* stk = mmap(0, SIGSTKSZ, PROT_READ|PROT_WRITE|PROT_EXEC,
MAP_PRIVATE|MAP_ANON, -1, 0);
// char* stk = ik_mmap(SIGSTKSZ);
if(stk == (char*)-1){
fprintf(stderr, "Cannot maloc an alt stack\n");
exit(-1);
}
stack_t sa;
sa.ss_sp = stk;
sa.ss_size = SIGSTKSZ;
sa.ss_flags = 0;
int err = sigaltstack(&sa, 0);
if(err){
fprintf(stderr, "Cannot set alt stack: %s\n", strerror(errno));
exit(-1);
}
#endif
}