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
  18 bigint object_id_counter = 1000000;
  19 enum gc_option { large, boehm } gc_option;
  20
  21 #ifdef WITH_LIBGC
  22 #define GC_DEBUG
  23 #include <gc/gc.h>
  24 #endif
  25
  26 void *large_alloc(size_t s0)
  27 {
  28         static char * alloc_pos = NULL;
  29         static size_t alloc_size = 0;
  30         void * res;
  31         size_t s = ((s0+3)/4)*4;
  32         if(alloc_size < s) {
  33                 alloc_size = s + 1024*1024;
  34                 alloc_pos = (char *)calloc(alloc_size, 1);
  35         }
  36         res = alloc_pos;
  37         alloc_size -= s;
  38         alloc_pos += s;
  39         return res;
  40 }
  41
  42 void * alloc(size_t s0)
  43 {
  44         switch (gc_option) {
  45 #ifdef WITH_LIBGC
  46         case boehm: return GC_MALLOC(s0);
  47 #endif
  48         case large:
  49         default: return large_alloc(s0);
  50         }
  51 }
  52
  53 int glob_argc;
  54 char **glob_argv;
  55 val_t G_sys;
  56
  57 void exithandler(int s) {
  58         fprintf(stderr, "Recieved signal %d\n", s);
  59         nit_exit(1);
  60 }
  61 void initialize_gc_option(void) {
  62         /* GC default */
  63 #ifdef WITH_LIBGC
  64         gc_option = boehm;
  65 #else
  66         gc_option = large;
  67 #endif
  68
  69         /* Process GC runtime selection */
  70         if (getenv("NIT_GC_OPTION") != NULL) {
  71                 char *opt=getenv("NIT_GC_OPTION");
  72                 if (strcmp(opt, "boehm")==0) {
  73 #ifdef WITH_LIBGC
  74                         gc_option = boehm;
  75 #else
  76                 fprintf(stderr, "Compiled without Boehm GC support. Using default.\n");
  77 #endif
  78                 } else if (strcmp(opt, "large")==0) {
  79                         gc_option = large;
  80                 } else {
  81                         fprintf(stderr, "Invalid GC option in NIT_GC_OPTION environment variable. Using default.\n");
  82                 }
  83         }
  84
  85         /* Initialize GC (if needed) */
  86         switch(gc_option) {
  87 #ifdef WITH_LIBGC
  88                 case boehm: GC_INIT(); break;
  89 #endif
  90                 default: break; /* Nothing */
  91         }
  92 }
  93 void prepare_signals(void) {
  94         initialize_gc_option();
  95
  96         signal(SIGINT,exithandler);
  97         signal(SIGABRT,exithandler);
  98         signal(SIGSEGV,exithandler);
  99         signal(SIGILL, exithandler);
 100         signal(SIGFPE, exithandler);
 101         signal(SIGTERM,exithandler);
 102         signal(SIGBUS, exithandler);
 103 }
 104 struct trace_t *tracehead = NULL;
 105 void nit_exit(int i) {
 106         fprintf(stderr, ",---- Stack trace -- - -  -\n");
 107         while(tracehead != NULL) {
 108                 fprintf(stderr, "| %s (%s:%d)\n", tracehead->meth, tracehead->file, tracehead->line);
 109                 if (tracehead == tracehead->prev) break;
 110                 tracehead = tracehead->prev;
 111         }
 112         fprintf(stderr, "`------------------- - -  -\n");
 113         exit(i);
 114 }