292 lines
7.6 KiB
C
292 lines
7.6 KiB
C
/*
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* Ikarus Scheme -- A compiler for R6RS Scheme.
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* Copyright (C) 2006,2007,2008 Abdulaziz Ghuloum
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 3 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "bootfileloc.h"
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#include "ikarus-data.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <string.h>
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#include <errno.h>
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#include <gmp.h>
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#include <signal.h>
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#include <sys/mman.h>
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void register_handlers();
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void register_alt_stack();
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void ikarus_usage_short(){
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fprintf(stderr, "ikarus -h for more help\n");
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}
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void ikarus_usage(){
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static char* helpstring =
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"\n\
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Options for running ikarus scheme:\n\
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\n ikarus -h\n\
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Prints this help message then exits.\n\
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\n ikarus [-b <bootfile>] --r6rs-script <scriptfile> opts ...\n\
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Starts ikarus in r6rs-script mode. The script file is treated\n\
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as an R6RS-script. The options opts ... can be obtained using\n\
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the \"command-line\" procedure in the (rnrs programs) library.\n\
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\n ikarus [-b <bootfile>] <file> ... [-- opts ...]\n\
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Starts ikarus in interactive mode. Each of the files is first\n\
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loaded into the interaction environment before the interactive\n\
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repl is started. The options opts can be obtained using the\n\
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\"command-line\" procedure.\n\
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\n\
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If the option [-b <bootfile>] is provided, the bootfile is used\n\
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as the system's initial boot file from which the environment is\n\
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initialized. If the -b option is not supplied, the default boot\n\
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file is used. The current default boot file location is\n\
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\"%s\".\n\
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Consult the Ikarus Scheme User's Guide for more details.\n\n";
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fprintf(stderr, helpstring, BOOTFILE);
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}
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ikpcb* the_pcb;
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/* get_option
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takes pointers to argc and argv and looks for the first
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option matching opt. If one exists, it removes it from the argv
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list, updates argc, and returns a pointer to the option value.
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returns null if option is not found.
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*/
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char*
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get_option(char* opt, int argc, char** argv){
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int i;
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for(i=1; i<argc; i++){
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if(strcmp(opt, argv[i]) == 0){
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if((i+1) < argc){
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char* rv = argv[i+1];
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int j;
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for(j=i+2; j<argc; j++, i++){
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argv[i] = argv[j];
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}
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return rv;
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}
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else {
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fprintf(stderr,
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"ikarus error: option %s requires a value, none provided\n",
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opt);
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ikarus_usage_short();
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exit(-1);
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}
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}
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else if(strcmp("--", argv[i]) == 0){
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return 0;
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}
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}
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return 0;
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}
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int
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get_option0(char* opt, int argc, char** argv){
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int i;
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for(i=1; i<argc; i++){
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if(strcmp(opt, argv[i]) == 0){
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int j;
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for(j=i+1; j<argc; j++, i++){
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argv[i] = argv[j];
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}
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return 1;
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}
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else if(strcmp("--", argv[i]) == 0){
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return 0;
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}
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}
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return 0;
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}
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int
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file_exists(char* filename){
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struct stat sb;
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int s = stat(filename, &sb);
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return (s == 0);
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}
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extern int cpu_has_sse2();
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int main(int argc, char** argv){
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if(! cpu_has_sse2()){
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fprintf(stderr, "Ikarus Scheme cannot run on your computer because\n");
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fprintf(stderr, "your CPU does not support the SSE2 instruction set.\n");
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fprintf(stderr, "Refer to the Ikarus Scheme User's Guide for the\n");
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fprintf(stderr, "minimum hardware requirements.\n");
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exit(-1);
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}
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if(get_option0("-h", argc, argv)){
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ikarus_usage();
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exit(0);
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}
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char* boot_file = get_option("-b", argc, argv);
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if(boot_file){
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argc -= 2;
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} else {
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boot_file = BOOTFILE;
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}
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if(sizeof(mp_limb_t) != sizeof(long int)){
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fprintf(stderr, "ERROR: limb size does not match\n");
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exit(-1);
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}
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if(mp_bits_per_limb != (8*sizeof(long int))){
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fprintf(stderr, "ERROR: invalid bits_per_limb=%d\n", mp_bits_per_limb);
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exit(-1);
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}
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ikpcb* pcb = ik_make_pcb();
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the_pcb = pcb;
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{ /* set up arg_list */
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ikptr arg_list = null_object;
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int i = argc-1;
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while(i > 0){
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char* s = argv[i];
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int n = strlen(s);
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ikptr str = ik_unsafe_alloc(pcb, align(n*string_char_size+disp_string_data+1))
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+ string_tag;
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ref(str, off_string_length) = fix(n);
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{
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int i;
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for(i=0; i<n; i++){
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string_set(str, i, integer_to_char(s[i]));
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}
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}
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ikptr p = ik_unsafe_alloc(pcb, pair_size);
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ref(p, disp_car) = str;
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ref(p, disp_cdr) = arg_list;
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arg_list = p+pair_tag;
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i--;
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}
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pcb->arg_list = arg_list;
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}
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register_handlers();
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register_alt_stack();
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ik_fasl_load(pcb, boot_file);
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/*
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fprintf(stderr, "collect time: %d.%03d utime, %d.%03d stime (%d collections)\n",
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pcb->collect_utime.tv_sec,
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pcb->collect_utime.tv_usec/1000,
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pcb->collect_stime.tv_sec,
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pcb->collect_stime.tv_usec/1000,
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pcb->collection_id );
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*/
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ik_delete_pcb(pcb);
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return 0;
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}
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#if 0
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Notice how the bsd manpages have incorrect type for the handler.
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#include <signal.h>
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struct sigaction {
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union {
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void (*__sa_handler)(int);
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void (*__sa_sigaction)(int, struct __siginfo *, void *);
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} __sigaction_u; /* signal handler */
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int sa_flags; /* see signal options below */
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sigset_t sa_mask; /* signal mask to apply */
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};
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#define sa_handler __sigaction_u.__sa_handler
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#define sa_sigaction __sigaction_u.__sa_sigaction
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int
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sigaction(int sig, const struct sigaction * restrict act,
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struct sigaction * restrict oact);
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#endif
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void handler(int signo, siginfo_t* info, void* uap){
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the_pcb->engine_counter = -1;
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the_pcb->interrupted = 1;
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}
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void
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register_handlers(){
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struct sigaction sa;
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sa.sa_sigaction = handler;
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#ifdef __CYGWIN__
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sa.sa_flags = SA_SIGINFO;
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#else
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sa.sa_flags = SA_SIGINFO | SA_ONSTACK;
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#endif
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sigemptyset(&sa.sa_mask);
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int err = sigaction(SIGINT, &sa, 0);
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if(err){
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fprintf(stderr, "Sigaction Failed: %s\n", strerror(errno));
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exit(-1);
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}
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/* ignore sigpipes */
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{
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sigset_t set;
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sigprocmask(0, 0, &set); /* get the set */
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sigaddset(&set, SIGPIPE);
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int err = sigprocmask(SIG_SETMASK, &set, &set);
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if(err){
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fprintf(stderr, "Sigprocmask Failed: %s\n", strerror(errno));
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exit(-1);
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}
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}
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}
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#if 0
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SYNOPSIS
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#include <sys/types.h>
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#include <signal.h>
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struct sigaltstack {
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char *ss_sp;
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int ss_size;
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int ss_flags;
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};
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int
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sigaltstack(const struct sigaltstack *ss, struct sigaltstack *oss);
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#endif
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void
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register_alt_stack(){
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#if HAVE_SIGALTSTACK
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char* stk = mmap(0, SIGSTKSZ, PROT_READ|PROT_WRITE|PROT_EXEC,
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MAP_PRIVATE|MAP_ANON, -1, 0);
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// char* stk = ik_mmap(SIGSTKSZ);
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if(stk == (char*)-1){
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fprintf(stderr, "Cannot maloc an alt stack\n");
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exit(-1);
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}
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stack_t sa;
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sa.ss_sp = stk;
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sa.ss_size = SIGSTKSZ;
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sa.ss_flags = 0;
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int err = sigaltstack(&sa, 0);
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if(err){
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fprintf(stderr, "Cannot set alt stack: %s\n", strerror(errno));
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exit(-1);
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}
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#endif
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}
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