200 lines
6.5 KiB
C
200 lines
6.5 KiB
C
/***********************************************************************/
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/* */
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/* OCaml */
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/* */
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/* Xavier Leroy and Damien Doligez, INRIA Rocquencourt */
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/* */
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/* Copyright 1996 Institut National de Recherche en Informatique et */
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/* en Automatique. All rights reserved. This file is distributed */
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/* under the terms of the GNU Library General Public License, with */
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/* the special exception on linking described in file ../LICENSE. */
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/* */
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/***********************************************************************/
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/* Start-up code */
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#include <stdio.h>
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#include <stdlib.h>
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#include "callback.h"
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#include "backtrace.h"
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#include "custom.h"
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#include "debugger.h"
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#include "fail.h"
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#include "freelist.h"
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#include "gc.h"
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#include "gc_ctrl.h"
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#include "intext.h"
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#include "memory.h"
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#include "misc.h"
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#include "mlvalues.h"
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#include "osdeps.h"
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#include "printexc.h"
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#include "stack.h"
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#include "sys.h"
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#ifdef HAS_UI
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#include "ui.h"
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#endif
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extern int caml_parser_trace;
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CAMLexport header_t caml_atom_table[256];
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char * caml_code_area_start, * caml_code_area_end;
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/* Initialize the atom table and the static data and code area limits. */
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struct segment { char * begin; char * end; };
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static void init_atoms(void)
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{
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extern struct segment caml_data_segments[], caml_code_segments[];
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int i;
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struct code_fragment * cf;
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for (i = 0; i < 256; i++) {
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caml_atom_table[i] = Make_header(0, i, Caml_white);
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}
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if (caml_page_table_add(In_static_data,
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caml_atom_table, caml_atom_table + 256) != 0)
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caml_fatal_error("Fatal error: not enough memory for initial page table");
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for (i = 0; caml_data_segments[i].begin != 0; i++) {
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/* PR#5509: we must include the zero word at end of data segment,
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because pointers equal to caml_data_segments[i].end are static data. */
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if (caml_page_table_add(In_static_data,
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caml_data_segments[i].begin,
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caml_data_segments[i].end + sizeof(value)) != 0)
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caml_fatal_error("Fatal error: not enough memory for initial page table");
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}
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caml_code_area_start = caml_code_segments[0].begin;
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caml_code_area_end = caml_code_segments[0].end;
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for (i = 1; caml_code_segments[i].begin != 0; i++) {
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if (caml_code_segments[i].begin < caml_code_area_start)
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caml_code_area_start = caml_code_segments[i].begin;
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if (caml_code_segments[i].end > caml_code_area_end)
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caml_code_area_end = caml_code_segments[i].end;
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}
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/* Register the code in the table of code fragments */
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cf = caml_stat_alloc(sizeof(struct code_fragment));
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cf->code_start = caml_code_area_start;
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cf->code_end = caml_code_area_end;
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cf->digest_computed = 0;
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caml_ext_table_init(&caml_code_fragments_table, 8);
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caml_ext_table_add(&caml_code_fragments_table, cf);
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}
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/* Configuration parameters and flags */
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static uintnat percent_free_init = Percent_free_def;
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static uintnat max_percent_free_init = Max_percent_free_def;
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static uintnat minor_heap_init = Minor_heap_def;
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static uintnat heap_chunk_init = Heap_chunk_def;
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static uintnat heap_size_init = Init_heap_def;
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static uintnat max_stack_init = Max_stack_def;
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/* Parse the CAMLRUNPARAM variable */
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/* The option letter for each runtime option is the first letter of the
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last word of the ML name of the option (see [stdlib/gc.mli]).
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Except for l (maximum stack size) and h (initial heap size).
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*/
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/* Note: option l is irrelevant to the native-code runtime. */
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/* If you change these functions, see also their copy in byterun/startup.c */
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static void scanmult (char *opt, uintnat *var)
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{
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char mult = ' ';
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int val;
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sscanf (opt, "=%u%c", &val, &mult);
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sscanf (opt, "=0x%x%c", &val, &mult);
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switch (mult) {
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case 'k': *var = (uintnat) val * 1024; break;
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case 'M': *var = (uintnat) val * 1024 * 1024; break;
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case 'G': *var = (uintnat) val * 1024 * 1024 * 1024; break;
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default: *var = (uintnat) val; break;
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}
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}
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static void parse_camlrunparam(void)
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{
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char *opt = getenv ("OCAMLRUNPARAM");
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uintnat p;
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if (opt == NULL) opt = getenv ("CAMLRUNPARAM");
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if (opt != NULL){
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while (*opt != '\0'){
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switch (*opt++){
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case 's': scanmult (opt, &minor_heap_init); break;
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case 'i': scanmult (opt, &heap_chunk_init); break;
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case 'h': scanmult (opt, &heap_size_init); break;
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case 'l': scanmult (opt, &max_stack_init); break;
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case 'o': scanmult (opt, &percent_free_init); break;
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case 'O': scanmult (opt, &max_percent_free_init); break;
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case 'v': scanmult (opt, &caml_verb_gc); break;
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case 'b': caml_record_backtrace(Val_true); break;
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case 'p': caml_parser_trace = 1; break;
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case 'a': scanmult (opt, &p); caml_set_allocation_policy (p); break;
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}
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}
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}
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}
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/* These are termination hooks used by the systhreads library */
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struct longjmp_buffer caml_termination_jmpbuf;
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void (*caml_termination_hook)(void *) = NULL;
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extern value caml_start_program (void);
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extern void caml_init_ieee_floats (void);
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extern void caml_init_signals (void);
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#ifdef _MSC_VER
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/* PR 4887: avoid crash box of windows runtime on some system calls */
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extern void caml_install_invalid_parameter_handler();
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#endif
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void caml_main(char **argv)
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{
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char * exe_name;
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static char proc_self_exe[256];
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value res;
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char tos;
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caml_init_ieee_floats();
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#ifdef _MSC_VER
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caml_install_invalid_parameter_handler();
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#endif
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caml_init_custom_operations();
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#ifdef DEBUG
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caml_verb_gc = 63;
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#endif
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caml_top_of_stack = &tos;
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parse_camlrunparam();
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caml_init_gc (minor_heap_init, heap_size_init, heap_chunk_init,
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percent_free_init, max_percent_free_init);
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init_atoms();
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caml_init_signals();
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caml_debugger_init (); /* force debugger.o stub to be linked */
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exe_name = argv[0];
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if (exe_name == NULL) exe_name = "";
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if (caml_executable_name(proc_self_exe, sizeof(proc_self_exe)) == 0)
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exe_name = proc_self_exe;
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else
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exe_name = caml_search_exe_in_path(exe_name);
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caml_sys_init(exe_name, argv);
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if (sigsetjmp(caml_termination_jmpbuf.buf, 0)) {
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if (caml_termination_hook != NULL) caml_termination_hook(NULL);
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return;
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}
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res = caml_start_program();
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if (Is_exception_result(res))
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caml_fatal_uncaught_exception(Extract_exception(res));
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}
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void caml_startup(char **argv)
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{
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caml_main(argv);
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}
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