clib/nit_main.c

   1 /* This file is part of NIT ( http://www.nitlanguage.org ).
   2  *
   3  * Copyright 2006-2009 Jean Privat <jean@pryen.org>
   4  *
   5  * This file is free software, which comes along with NIT.  This software is
   6  * distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
   7  * without  even  the implied warranty of  MERCHANTABILITY or  FITNESS FOR A
   8  * PARTICULAR PURPOSE.  You can modify it is you want,  provided this header
   9  * is kept unaltered, and a notification of the changes is added.
  10  * You  are  allowed  to  redistribute it and sell it, alone or is a part of
  11  * another product.
  12  */
  13
  14 #include "nit_common.h"
  15 #include <signal.h>
  16 #include <stdarg.h>
  17 #include "gc.h"
  18
  19 bigint object_id_counter = 1000000;
  20 enum gc_option { large, gc_opt_malloc, boehm, nitgc } gc_option;
  21
  22 #ifdef WITH_LIBGC
  23 #define GC_DEBUG
  24 #include <gc/gc.h>
  25 #endif
  26
  27 void *raw_alloc(size_t s0)
  28 {
  29         switch (gc_option) {
  30         case nitgc: return malloc(s0);
  31         case gc_opt_malloc: return malloc(s0);
  32         default: return alloc(s0);
  33         }
  34 }
  35
  36 void register_static_object(val_t *o)
  37 {
  38         switch (gc_option) {
  39         case nitgc: GC_add_static_object(o); break;
  40         default: break;
  41         }
  42         return;
  43 }
  44
  45 void *large_alloc(size_t s0)
  46 {
  47         static char * alloc_pos = NULL;
  48         static size_t alloc_size = 0;
  49         void * res;
  50         size_t s = ((s0+3)/4)*4;
  51         if(alloc_size < s) {
  52                 alloc_size = s + 1024*1024;
  53                 alloc_pos = (char *)calloc(alloc_size, 1);
  54         }
  55         res = alloc_pos;
  56         alloc_size -= s;
  57         alloc_pos += s;
  58         return res;
  59 }
  60
  61 void * alloc(size_t s0)
  62 {
  63         switch (gc_option) {
  64 #ifdef WITH_LIBGC
  65         case boehm: return GC_MALLOC(s0);
  66 #endif
  67         case nitgc: return Nit_gc_malloc(s0);
  68         case gc_opt_malloc: return calloc(1, s0);
  69         case large:
  70         default: return large_alloc(s0);
  71         }
  72 }
  73
  74 int glob_argc;
  75 char **glob_argv;
  76 val_t G_sys;
  77
  78 void exithandler(int s) {
  79         fprintf(stderr, "Recieved signal %d\n", s);
  80         nit_exit(1);
  81 }
  82 void initialize_gc_option(void) {
  83         /* GC default */
  84         char *def;
  85         gc_option = nitgc;
  86         def = "nitgc";
  87
  88         /* Process GC runtime selection */
  89         if (getenv("NIT_GC_OPTION") != NULL) {
  90                 char *opt=getenv("NIT_GC_OPTION");
  91                 if (strcmp(opt, "boehm")==0) {
  92 #ifdef WITH_LIBGC
  93                         gc_option = boehm;
  94 #else
  95                 fprintf(stderr, "Compiled without Boehm GC support. Using default '%s'.\n", def);
  96 #endif
  97                 } else if (strcmp(opt, "nitgc")==0) {
  98                         gc_option = nitgc;
  99                 } else if (strcmp(opt, "malloc")==0) {
 100                         gc_option = gc_opt_malloc;
 101                 } else if (strcmp(opt, "large")==0) {
 102                         gc_option = large;
 103                 } else if (strcmp(opt, "help")==0) {
 104                         fprintf(stderr, "NIT_GC_OPTION accepts 'nitgc'"
 105 #ifdef WITH_LIBGC
 106                                         ", 'boehm'"
 107 #endif
 108                                         ", 'large', 'malloc'. Default is '%s'.\n", def);
 109                         exit(1);
 110                 } else {
 111                         fprintf(stderr, "Invalid GC option in NIT_GC_OPTION environment variable. Using default '%s'.\n", def);
 112                 }
 113         }
 114
 115         /* Initialize GC (if needed) */
 116         switch(gc_option) {
 117 #ifdef WITH_LIBGC
 118                 case boehm: GC_INIT(); break;
 119 #endif
 120                 case nitgc: Nit_gc_init(); break;
 121                 default: break; /* Nothing */
 122         }
 123
 124         /* Initialize global references list */
 125         nitni_global_ref_list_init();
 126 }
 127 void prepare_signals(void) {
 128         initialize_gc_option();
 129
 130         signal(SIGINT,exithandler);
 131         signal(SIGABRT,exithandler);
 132         signal(SIGSEGV,exithandler);
 133         signal(SIGILL, exithandler);
 134         signal(SIGFPE, exithandler);
 135         signal(SIGTERM,exithandler);
 136         signal(SIGBUS, exithandler);
 137 }
 138 struct stack_frame_t *stack_frame_head = NULL;
 139 void nit_exit(int i) {
 140         char *opt=getenv("NIT_NO_STACK");
 141         if (opt == NULL || strcmp(opt, "0")==0) {
 142                 fprintf(stderr, ",---- Stack trace -- - -  -\n");
 143                 while(stack_frame_head != NULL) {
 144                         fprintf(stderr, "| %s (%s:%d)\n", stack_frame_head->meth, stack_frame_head->file, stack_frame_head->line);
 145                         if (stack_frame_head == stack_frame_head->prev) break;
 146                         stack_frame_head = stack_frame_head->prev;
 147                 }
 148                 fprintf(stderr, "`------------------- - -  -\n");
 149         }
 150         exit(i);
 151 }
 152
 153 void nit_abort(const char* s, const char* msg, const char* loc, int line) {
 154         fprintf(stderr, s, msg);
 155         fprintf(stderr, " (%s", loc);
 156         if (line != 0) fprintf(stderr, ":%d", line);
 157         fprintf(stderr, ")\n");
 158         nit_exit(1);
 159 }
 160
 161 /* Register reference to Nit object with the latest extern method called. */
 162 void nitni_local_ref_add( struct nitni_ref *ref ) {
 163         struct nitni_ref_array_link **link_p;
 164         struct nitni_ref_array_link * link = NULL;
 165
 166         /* find usable link or link to create */
 167         link_p = &( stack_frame_head->nitni_local_ref_head );
 168         while ( (*link_p) != NULL &&
 169                         (*link_p)->count >= NITNI_REF_ARRAY_LINK_SIZE ) {
 170                 link_p = &((*link_p)->next);
 171         }
 172
 173         /* create link if needed */
 174         if ( *link_p == NULL ) {
 175                 link = malloc( sizeof(struct nitni_ref_array_link) );
 176                 link->count = 0;
 177                 link->next = NULL;
 178
 179                 (*link_p) = link;
 180         } else {
 181                 link = *link_p;
 182         }
 183
 184         /* add to link */
 185         link->reg[ link->count ] = ref;
 186         link->count ++;
 187 }
 188
 189 /* Clean all references associated to the current (but returning) extern method. */
 190 void nitni_local_ref_clean( void ) {
 191         struct nitni_ref_array_link * link,
 192                 * last_link;
 193         int i;
 194
 195         link = stack_frame_head->nitni_local_ref_head;
 196         while ( link != NULL )
 197         {
 198                 for ( i = 0; i < link->count; i ++ ) {
 199                         if ( link->reg[i]->count == 0 ) { /* not registered globally */
 200                                 free( link->reg[ i ] );
 201                         }
 202                 }
 203
 204                 last_link = link;
 205                 if ( link->count == NITNI_REF_ARRAY_LINK_SIZE )
 206                         link = link->next;
 207                 else
 208                         link = NULL;
 209
 210                 free(last_link);
 211         }
 212
 213         stack_frame_head->nitni_local_ref_head = NULL;
 214 }
 215
 216 struct nitni_global_ref_list_t *nitni_global_ref_list;
 217 void nitni_global_ref_list_init() {
 218         nitni_global_ref_list = (struct nitni_global_ref_list_t*)malloc(sizeof(struct nitni_global_ref_list_t));
 219         nitni_global_ref_list->head = NULL;
 220         nitni_global_ref_list->tail = NULL;
 221 }
 222
 223 void nitni_global_ref_add( struct nitni_ref *ref ) {
 224         if ( nitni_global_ref_list->head == NULL ) {
 225                 nitni_global_ref_list->head = ref;
 226                 nitni_global_ref_list->tail = ref;
 227
 228                 ref->prev = NULL;
 229         } else {
 230                 nitni_global_ref_list->tail->next = ref;
 231                 ref->prev = nitni_global_ref_list->tail;
 232         }
 233
 234         ref->next = NULL;
 235 }
 236
 237 void nitni_global_ref_remove( struct nitni_ref *ref ) {
 238         if ( ref->prev == NULL ) {
 239                 nitni_global_ref_list->head = ref->next;
 240         } else {
 241                 ref->prev->next = ref->next;
 242         }
 243
 244         if ( ref->next == NULL ) {
 245                 nitni_global_ref_list->tail = ref->prev;
 246         } else {
 247                 ref->next->prev = ref->prev;
 248         }
 249 }
 250
 251 extern void nitni_global_ref_incr( struct nitni_ref *ref ) {
 252         if ( ref->count == 0 ) /* not registered */
 253         {
 254                 /* add to list */
 255                 nitni_global_ref_add( ref );
 256         }
 257
 258         ref->count ++;
 259 }
 260
 261 extern void nitni_global_ref_decr( struct nitni_ref *ref ) {
 262         if ( ref->count == 1 ) /* was last reference */
 263         {
 264                 /* remove from list */
 265                 nitni_global_ref_remove( ref );
 266         }
 267
 268         ref->count --;
 269 }