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, 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); break;
  31         default: return alloc(s0);
  32         }
  33 }
  34
  35 void register_static_object(val_t *o)
  36 {
  37         switch (gc_option) {
  38         case nitgc: GC_add_static_object(o); break;
  39         default: break;
  40         }
  41         return;
  42 }
  43
  44 void *large_alloc(size_t s0)
  45 {
  46         static char * alloc_pos = NULL;
  47         static size_t alloc_size = 0;
  48         void * res;
  49         size_t s = ((s0+3)/4)*4;
  50         if(alloc_size < s) {
  51                 alloc_size = s + 1024*1024;
  52                 alloc_pos = (char *)calloc(alloc_size, 1);
  53         }
  54         res = alloc_pos;
  55         alloc_size -= s;
  56         alloc_pos += s;
  57         return res;
  58 }
  59
  60 void * alloc(size_t s0)
  61 {
  62         switch (gc_option) {
  63 #ifdef WITH_LIBGC
  64         case boehm: return GC_MALLOC(s0);
  65 #endif
  66         case nitgc: return Nit_gc_malloc(s0);
  67         case large:
  68         default: return large_alloc(s0);
  69         }
  70 }
  71
  72 int glob_argc;
  73 char **glob_argv;
  74 val_t G_sys;
  75
  76 void exithandler(int s) {
  77         fprintf(stderr, "Recieved signal %d\n", s);
  78         nit_exit(1);
  79 }
  80 void initialize_gc_option(void) {
  81         /* GC default */
  82         char *def;
  83 #ifdef WITH_LIBGC
  84         gc_option = boehm;
  85         def = "boehm";
  86 #else
  87         gc_option = nitgc;
  88         def = "nitgc";
  89 #endif
  90
  91         /* Process GC runtime selection */
  92         if (getenv("NIT_GC_OPTION") != NULL) {
  93                 char *opt=getenv("NIT_GC_OPTION");
  94                 if (strcmp(opt, "boehm")==0) {
  95 #ifdef WITH_LIBGC
  96                         gc_option = boehm;
  97 #else
  98                 fprintf(stderr, "Compiled without Boehm GC support. Using default '%s'.\n", def);
  99 #endif
 100                 } else if (strcmp(opt, "nitgc")==0) {
 101                         gc_option = nitgc;
 102                 } else if (strcmp(opt, "large")==0) {
 103                         gc_option = large;
 104                 } else if (strcmp(opt, "help")==0) {
 105                         fprintf(stderr, "NIT_GC_OPTION accepts 'nitgc'"
 106 #ifdef WITH_LIBGC
 107                                         ", 'boehm'"
 108 #endif
 109                                         ", 'large'. Default is '%s'.\n", def);
 110                         exit(1);
 111                 } else {
 112                         fprintf(stderr, "Invalid GC option in NIT_GC_OPTION environment variable. Using default '%s'.\n", def);
 113                 }
 114         }
 115
 116         /* Initialize GC (if needed) */
 117         switch(gc_option) {
 118 #ifdef WITH_LIBGC
 119                 case boehm: GC_INIT(); break;
 120 #endif
 121                 case nitgc: Nit_gc_init(); break;
 122                 default: break; /* Nothing */
 123         }
 124 }
 125 void prepare_signals(void) {
 126         initialize_gc_option();
 127
 128         signal(SIGINT,exithandler);
 129         signal(SIGABRT,exithandler);
 130         signal(SIGSEGV,exithandler);
 131         signal(SIGILL, exithandler);
 132         signal(SIGFPE, exithandler);
 133         signal(SIGTERM,exithandler);
 134         signal(SIGBUS, exithandler);
 135 }
 136 struct stack_frame_t *stack_frame_head = NULL;
 137 void nit_exit(int i) {
 138         char *opt=getenv("NIT_NO_STACK");
 139         if (opt == NULL || strcmp(opt, "0")==0) {
 140                 fprintf(stderr, ",---- Stack trace -- - -  -\n");
 141                 while(stack_frame_head != NULL) {
 142                         fprintf(stderr, "| %s (%s:%d)\n", stack_frame_head->meth, stack_frame_head->file, stack_frame_head->line);
 143                         if (stack_frame_head == stack_frame_head->prev) break;
 144                         stack_frame_head = stack_frame_head->prev;
 145                 }
 146                 fprintf(stderr, "`------------------- - -  -\n");
 147         }
 148         exit(i);
 149 }