vm/vm.hpp

   1 namespace factor
   2 {
   3
   4 struct growable_array;
   5 struct code_root;
   6
   7 struct factor_vm
   8 {
   9         //
  10         // vvvvvv
  11         // THESE FIELDS ARE ACCESSED DIRECTLY FROM FACTOR. See:
  12         //   basis/vm/vm.factor
  13         //   basis/compiler/constants/constants.factor
  14
  15         /* Current context */
  16         context *ctx;
  17
  18         /* Spare context -- for callbacks */
  19         context *spare_ctx;
  20
  21         /* New objects are allocated here */
  22         nursery_space nursery;
  23
  24         /* Add this to a shifted address to compute write barrier offsets */
  25         cell cards_offset;
  26         cell decks_offset;
  27
  28         /* cdecl signal handler address, used by signal handler subprimitives */
  29         cell signal_handler_addr;
  30
  31         /* Various special objects, accessed by special-object and
  32         set-special-object primitives */
  33         cell special_objects[special_object_count];
  34
  35         // THESE FIELDS ARE ACCESSED DIRECTLY FROM FACTOR.
  36         // ^^^^^^
  37         //
  38
  39         /* Data stack and retain stack sizes */
  40         cell datastack_size, retainstack_size, callstack_size;
  41
  42         /* Stack of callback IDs */
  43         std::vector<int> callback_ids;
  44
  45         /* Next callback ID */
  46         int callback_id;
  47
  48         /* List of callback function descriptors for PPC */
  49         std::list<void **> function_descriptors;
  50
  51         /* Pooling unused contexts to make context allocation cheaper */
  52         std::list<context *> unused_contexts;
  53
  54         /* Active contexts, for tracing by the GC */
  55         std::set<context *> active_contexts;
  56
  57         /* Canonical truth value. In Factor, 't' */
  58         cell true_object;
  59
  60         /* External entry points */
  61         c_to_factor_func_type c_to_factor_func;
  62
  63         /* Is profiling enabled? */
  64         bool counting_profiler_p;
  65         volatile bool sampling_profiler_p;
  66         fixnum samples_per_second;
  67
  68         /* Global variables used to pass fault handler state from signal handler
  69         to VM */
  70         bool signal_resumable;
  71         cell signal_number;
  72         cell signal_fault_addr;
  73         unsigned int signal_fpu_status;
  74         volatile bool safepoint_fep;
  75
  76         /* State kept by the sampling profiler */
  77         std::vector<profiling_sample> samples;
  78         std::vector<cell> sample_callstacks;
  79         volatile profiling_sample_count safepoint_sample_counts;
  80
  81         /* GC is off during heap walking */
  82         bool gc_off;
  83
  84         /* Data heap */
  85         data_heap *data;
  86
  87         /* Code heap */
  88         code_heap *code;
  89
  90         /* Pinned callback stubs */
  91         callback_heap *callbacks;
  92
  93         /* Only set if we're performing a GC */
  94         volatile gc_state *current_gc;
  95
  96         /* Mark stack */
  97         std::vector<cell> mark_stack;
  98
  99         /* If not NULL, we push GC events here */
 100         std::vector<gc_event> *gc_events;
 101
 102         /* If a runtime function needs to call another function which potentially
 103            allocates memory, it must wrap any references to the data and code
 104            heaps with data_root and code_root smart pointers, which register
 105            themselves here. See data_roots.hpp and code_roots.hpp */
 106         std::vector<data_root_range> data_roots;
 107         std::vector<cell> bignum_roots;
 108         std::vector<code_root *> code_roots;
 109
 110         /* Debugger */
 111         bool fep_p;
 112         bool fep_help_was_shown;
 113         bool fep_disabled;
 114         bool full_output;
 115
 116         /* Canonical bignums */
 117         cell bignum_zero;
 118         cell bignum_pos_one;
 119         cell bignum_neg_one;
 120
 121         /* Method dispatch statistics */
 122         dispatch_statistics dispatch_stats;
 123
 124         /* Number of entries in a polymorphic inline cache */
 125         cell max_pic_size;
 126
 127         /* Incrementing object counter for identity hashing */
 128         cell object_counter;
 129
 130         /* Sanity check to ensure that monotonic counter doesn't
 131         decrease */
 132         u64 last_nano_count;
 133
 134         /* Stack for signal handlers, only used on Unix */
 135         segment *signal_callstack_seg;
 136
 137         /* Are we already handling a fault? Used to catch double memory faults */
 138         bool faulting_p;
 139
 140         // contexts
 141         context *new_context();
 142         void init_context(context *ctx);
 143         void delete_context(context *old_context);
 144         void init_contexts(cell datastack_size_, cell retainstack_size_, cell callstack_size_);
 145         void delete_contexts();
 146         cell begin_callback(cell quot);
 147         void end_callback();
 148         void primitive_current_callback();
 149         void primitive_context_object();
 150         void primitive_context_object_for();
 151         void primitive_set_context_object();
 152         cell stack_to_array(cell bottom, cell top);
 153         cell datastack_to_array(context *ctx);
 154         void primitive_datastack();
 155         void primitive_datastack_for();
 156         cell retainstack_to_array(context *ctx);
 157         void primitive_retainstack();
 158         void primitive_retainstack_for();
 159         cell array_to_stack(array *array, cell bottom);
 160         void set_datastack(context *ctx, array *array);
 161         void primitive_set_datastack();
 162         void set_retainstack(context *ctx, array *array);
 163         void primitive_set_retainstack();
 164         void primitive_check_datastack();
 165         void primitive_load_locals();
 166
 167         template<typename Iterator> void iterate_active_callstacks(Iterator &iter)
 168         {
 169                 std::set<context *>::const_iterator begin = active_contexts.begin();
 170                 std::set<context *>::const_iterator end = active_contexts.end();
 171                 while(begin != end) iterate_callstack(*begin++,iter);
 172         }
 173
 174         // run
 175         void primitive_exit();
 176         void primitive_nano_count();
 177         void primitive_sleep();
 178         void primitive_set_slot();
 179
 180         // objects
 181         void primitive_special_object();
 182         void primitive_set_special_object();
 183         void primitive_identity_hashcode();
 184         void compute_identity_hashcode(object *obj);
 185         void primitive_compute_identity_hashcode();
 186         cell object_size(cell tagged);
 187         cell clone_object(cell obj_);
 188         void primitive_clone();
 189         void primitive_become();
 190
 191         // counting_profiler
 192         void init_counting_profiler();
 193         code_block *compile_counting_profiler_stub(cell word_);
 194         void set_counting_profiler(bool counting_profiler);
 195         void primitive_counting_profiler();
 196
 197         /* Sampling profiler */
 198         void clear_samples();
 199         void record_sample();
 200         void record_callstack_sample(cell *begin, cell *end);
 201         void start_sampling_profiler(fixnum rate);
 202         void end_sampling_profiler();
 203         void set_sampling_profiler(fixnum rate);
 204         void enqueue_safepoint_sample(cell samples, cell pc, bool foreign_thread_p);
 205         void primitive_sampling_profiler();
 206         void primitive_get_samples();
 207         void primitive_clear_samples();
 208
 209         // errors
 210         void general_error(vm_error_type error, cell arg1, cell arg2);
 211         void type_error(cell type, cell tagged);
 212         void not_implemented_error();
 213         void memory_protection_error(cell addr);
 214         void signal_error(cell signal);
 215         void divide_by_zero_error();
 216         void fp_trap_error(unsigned int fpu_status);
 217         void primitive_unimplemented();
 218         void memory_signal_handler_impl();
 219         void synchronous_signal_handler_impl();
 220         void fp_signal_handler_impl();
 221         void enqueue_safepoint_fep();
 222         void handle_safepoint();
 223
 224         // bignum
 225         int bignum_equal_p(bignum * x, bignum * y);
 226         enum bignum_comparison bignum_compare(bignum * x, bignum * y);
 227         bignum *bignum_add(bignum * x, bignum * y);
 228         bignum *bignum_subtract(bignum * x, bignum * y);
 229         bignum *bignum_multiply(bignum * x, bignum * y);
 230         void bignum_divide(bignum * numerator, bignum * denominator, bignum * * quotient, bignum * * remainder);
 231         bignum *bignum_quotient(bignum * numerator, bignum * denominator);
 232         bignum *bignum_remainder(bignum * numerator, bignum * denominator);
 233         cell bignum_to_cell(bignum * bignum);
 234         fixnum bignum_to_fixnum(bignum * bignum);
 235         s64 bignum_to_long_long(bignum * bignum);
 236         u64 bignum_to_ulong_long(bignum * bignum);
 237         bignum *double_to_bignum(double x);
 238         int bignum_equal_p_unsigned(bignum * x, bignum * y);
 239         enum bignum_comparison bignum_compare_unsigned(bignum * x, bignum * y);
 240         bignum *bignum_add_unsigned(bignum * x, bignum * y, int negative_p);
 241         bignum *bignum_subtract_unsigned(bignum * x, bignum * y);
 242         bignum *bignum_multiply_unsigned(bignum * x, bignum * y, int negative_p);
 243         bignum *bignum_multiply_unsigned_small_factor(bignum * x, bignum_digit_type y,int negative_p);
 244         void bignum_destructive_add(bignum * bignum, bignum_digit_type n);
 245         void bignum_destructive_scale_up(bignum * bignum, bignum_digit_type factor);
 246         void bignum_divide_unsigned_large_denominator(bignum * numerator, bignum * denominator,
 247                                                         bignum * * quotient, bignum * * remainder, int q_negative_p, int r_negative_p);
 248         void bignum_divide_unsigned_normalized(bignum * u, bignum * v, bignum * q);
 249         bignum_digit_type bignum_divide_subtract(bignum_digit_type * v_start, bignum_digit_type * v_end,
 250                                                         bignum_digit_type guess, bignum_digit_type * u_start);
 251         void bignum_divide_unsigned_medium_denominator(bignum * numerator,bignum_digit_type denominator,
 252                                                         bignum * * quotient, bignum * * remainder,int q_negative_p, int r_negative_p);
 253         void bignum_destructive_normalization(bignum * source, bignum * target, int shift_left);
 254         void bignum_destructive_unnormalization(bignum * bignum, int shift_right);
 255         bignum_digit_type bignum_digit_divide(bignum_digit_type uh, bignum_digit_type ul,
 256                                                         bignum_digit_type v, bignum_digit_type * q) /* return value */;
 257         bignum_digit_type bignum_digit_divide_subtract(bignum_digit_type v1, bignum_digit_type v2,
 258                                                         bignum_digit_type guess, bignum_digit_type * u);
 259         void bignum_divide_unsigned_small_denominator(bignum * numerator, bignum_digit_type denominator,
 260                                                         bignum * * quotient, bignum * * remainder,int q_negative_p, int r_negative_p);
 261         bignum_digit_type bignum_destructive_scale_down(bignum * bignum, bignum_digit_type denominator);
 262         bignum * bignum_remainder_unsigned_small_denominator(bignum * n, bignum_digit_type d, int negative_p);
 263         bignum *bignum_digit_to_bignum(bignum_digit_type digit, int negative_p);
 264         bignum *allot_bignum(bignum_length_type length, int negative_p);
 265         bignum * allot_bignum_zeroed(bignum_length_type length, int negative_p);
 266         bignum *bignum_shorten_length(bignum * bignum, bignum_length_type length);
 267         bignum *bignum_trim(bignum * bignum);
 268         bignum *bignum_new_sign(bignum * x, int negative_p);
 269         bignum *bignum_maybe_new_sign(bignum * x, int negative_p);
 270         void bignum_destructive_copy(bignum * source, bignum * target);
 271         bignum *bignum_bitwise_not(bignum * x);
 272         bignum *bignum_arithmetic_shift(bignum * arg1, fixnum n);
 273         bignum *bignum_bitwise_and(bignum * arg1, bignum * arg2);
 274         bignum *bignum_bitwise_ior(bignum * arg1, bignum * arg2);
 275         bignum *bignum_bitwise_xor(bignum * arg1, bignum * arg2);
 276         bignum *bignum_magnitude_ash(bignum * arg1, fixnum n);
 277         bignum *bignum_pospos_bitwise_op(int op, bignum * arg1, bignum * arg2);
 278         bignum *bignum_posneg_bitwise_op(int op, bignum * arg1, bignum * arg2);
 279         bignum *bignum_negneg_bitwise_op(int op, bignum * arg1, bignum * arg2);
 280         void bignum_negate_magnitude(bignum * arg);
 281         bignum *bignum_integer_length(bignum * x);
 282         int bignum_logbitp(int shift, bignum * arg);
 283         int bignum_unsigned_logbitp(int shift, bignum * bignum);
 284
 285         //data heap
 286         void init_card_decks();
 287         void set_data_heap(data_heap *data_);
 288         void init_data_heap(cell young_size, cell aging_size, cell tenured_size);
 289         void primitive_size();
 290         data_heap_room data_room();
 291         void primitive_data_room();
 292         void begin_scan();
 293         void end_scan();
 294         cell instances(cell type);
 295         void primitive_all_instances();
 296
 297         template<typename Generation, typename Iterator>
 298         inline void each_object(Generation *gen, Iterator &iterator)
 299         {
 300                 cell obj = gen->first_object();
 301                 while(obj)
 302                 {
 303                         iterator((object *)obj);
 304                         obj = gen->next_object_after(obj);
 305                 }
 306         }
 307
 308         template<typename Iterator> inline void each_object(Iterator &iterator)
 309         {
 310                 gc_off = true;
 311
 312                 each_object(data->tenured,iterator);
 313                 each_object(data->aging,iterator);
 314                 each_object(data->nursery,iterator);
 315
 316                 gc_off = false;
 317         }
 318
 319         /* the write barrier must be called any time we are potentially storing a
 320            pointer from an older generation to a younger one */
 321         inline void write_barrier(cell *slot_ptr)
 322         {
 323                 *(char *)(cards_offset + ((cell)slot_ptr >> card_bits)) = card_mark_mask;
 324                 *(char *)(decks_offset + ((cell)slot_ptr >> deck_bits)) = card_mark_mask;
 325         }
 326
 327         inline void write_barrier(object *obj, cell size)
 328         {
 329                 cell start = (cell)obj & (~card_size + 1);
 330                 cell end = ((cell)obj + size + card_size - 1) & (~card_size + 1);
 331
 332                 for(cell offset = start; offset < end; offset += card_size)
 333                         write_barrier((cell *)offset);
 334         }
 335
 336         // data heap checker
 337         void check_data_heap();
 338
 339         // gc
 340         void end_gc();
 341         void set_current_gc_op(gc_op op);
 342         void start_gc_again();
 343         void update_code_heap_for_minor_gc(std::set<code_block *> *remembered_set);
 344         void collect_nursery();
 345         void collect_aging();
 346         void collect_to_tenured();
 347         void update_code_roots_for_sweep();
 348         void update_code_roots_for_compaction();
 349         void collect_mark_impl(bool trace_contexts_p);
 350         void collect_sweep_impl();
 351         void collect_full(bool trace_contexts_p);
 352         void collect_compact_impl(bool trace_contexts_p);
 353         void collect_compact_code_impl(bool trace_contexts_p);
 354         void collect_compact(bool trace_contexts_p);
 355         void collect_growing_heap(cell requested_size, bool trace_contexts_p);
 356         void gc(gc_op op, cell requested_size, bool trace_contexts_p);
 357         void scrub_context(context *ctx);
 358         void scrub_contexts();
 359         void primitive_minor_gc();
 360         void primitive_full_gc();
 361         void primitive_compact_gc();
 362         void primitive_enable_gc_events();
 363         void primitive_disable_gc_events();
 364         object *allot_object(cell type, cell size);
 365         object *allot_large_object(cell type, cell size);
 366
 367         template<typename Type> Type *allot(cell size)
 368         {
 369                 return (Type *)allot_object(Type::type_number,size);
 370         }
 371
 372         inline void check_data_pointer(object *pointer)
 373         {
 374         #ifdef FACTOR_DEBUG
 375                 if(!(current_gc && current_gc->op == collect_growing_heap_op))
 376                         assert(data->seg->in_segment_p((cell)pointer));
 377         #endif
 378         }
 379
 380         // generic arrays
 381         template<typename Array> Array *allot_uninitialized_array(cell capacity);
 382         template<typename Array> bool reallot_array_in_place_p(Array *array, cell capacity);
 383         template<typename Array> Array *reallot_array(Array *array_, cell capacity);
 384
 385         // debug
 386         void print_chars(string* str);
 387         void print_word(word* word, cell nesting);
 388         void print_factor_string(string* str);
 389         void print_array(array* array, cell nesting);
 390         void print_tuple(tuple *tuple, cell nesting);
 391         void print_nested_obj(cell obj, fixnum nesting);
 392         void print_obj(cell obj);
 393         void print_objects(cell *start, cell *end);
 394         void print_datastack();
 395         void print_retainstack();
 396         void print_callstack();
 397         void dump_cell(cell x);
 398         void dump_memory(cell from, cell to);
 399         template<typename Generation> void dump_generation(const char *name, Generation *gen);
 400         void dump_generations();
 401         void dump_objects(cell type);
 402         void find_data_references_step(cell *scan);
 403         void find_data_references(cell look_for_);
 404         void dump_code_heap();
 405         void factorbug_usage(bool advanced_p);
 406         void factorbug();
 407         void primitive_die();
 408
 409         // arrays
 410         inline void set_array_nth(array *array, cell slot, cell value);
 411         array *allot_array(cell capacity, cell fill_);
 412         void primitive_array();
 413         cell allot_array_1(cell obj_);
 414         cell allot_array_2(cell v1_, cell v2_);
 415         cell allot_array_4(cell v1_, cell v2_, cell v3_, cell v4_);
 416         void primitive_resize_array();
 417         cell std_vector_to_array(std::vector<cell> &elements);
 418
 419         // strings
 420         string *allot_string_internal(cell capacity);
 421         void fill_string(string *str_, cell start, cell capacity, cell fill);
 422         string *allot_string(cell capacity, cell fill);
 423         void primitive_string();
 424         bool reallot_string_in_place_p(string *str, cell capacity);
 425         string* reallot_string(string *str_, cell capacity);
 426         void primitive_resize_string();
 427         void primitive_set_string_nth_fast();
 428
 429         // booleans
 430         cell tag_boolean(cell untagged)
 431         {
 432                 return (untagged ? true_object : false_object);
 433         }
 434
 435         // byte arrays
 436         byte_array *allot_byte_array(cell size);
 437         void primitive_byte_array();
 438         void primitive_uninitialized_byte_array();
 439         void primitive_resize_byte_array();
 440
 441         template<typename Type> byte_array *byte_array_from_value(Type *value);
 442
 443         // tuples
 444         void primitive_tuple();
 445         void primitive_tuple_boa();
 446
 447         // words
 448         word *allot_word(cell name_, cell vocab_, cell hashcode_);
 449         void primitive_word();
 450         void primitive_word_code();
 451         void update_word_entry_point(word *w_);
 452         void primitive_optimized_p();
 453         void primitive_wrapper();
 454         void jit_compile_word(cell word_, cell def_, bool relocating);
 455         cell find_all_words();
 456         void compile_all_words();
 457
 458         // math
 459         void primitive_bignum_to_fixnum();
 460         void primitive_float_to_fixnum();
 461         void primitive_fixnum_divint();
 462         void primitive_fixnum_divmod();
 463         bignum *fixnum_to_bignum(fixnum);
 464         bignum *cell_to_bignum(cell);
 465         bignum *long_long_to_bignum(s64 n);
 466         bignum *ulong_long_to_bignum(u64 n);
 467         inline fixnum sign_mask(fixnum x);
 468         inline fixnum branchless_max(fixnum x, fixnum y);
 469         inline fixnum branchless_abs(fixnum x);
 470         void primitive_fixnum_shift();
 471         void primitive_fixnum_to_bignum();
 472         void primitive_float_to_bignum();
 473         void primitive_bignum_eq();
 474         void primitive_bignum_add();
 475         void primitive_bignum_subtract();
 476         void primitive_bignum_multiply();
 477         void primitive_bignum_divint();
 478         void primitive_bignum_divmod();
 479         void primitive_bignum_mod();
 480         void primitive_bignum_and();
 481         void primitive_bignum_or();
 482         void primitive_bignum_xor();
 483         void primitive_bignum_shift();
 484         void primitive_bignum_less();
 485         void primitive_bignum_lesseq();
 486         void primitive_bignum_greater();
 487         void primitive_bignum_greatereq();
 488         void primitive_bignum_not();
 489         void primitive_bignum_bitp();
 490         void primitive_bignum_log2();
 491         inline cell unbox_array_size();
 492         cell unbox_array_size_slow();
 493         void primitive_fixnum_to_float();
 494         void primitive_format_float();
 495         void primitive_float_eq();
 496         void primitive_float_add();
 497         void primitive_float_subtract();
 498         void primitive_float_multiply();
 499         void primitive_float_divfloat();
 500         void primitive_float_less();
 501         void primitive_float_lesseq();
 502         void primitive_float_greater();
 503         void primitive_float_greatereq();
 504         void primitive_float_bits();
 505         void primitive_bits_float();
 506         void primitive_double_bits();
 507         void primitive_bits_double();
 508         fixnum to_fixnum(cell tagged);
 509         cell to_cell(cell tagged);
 510         cell from_signed_8(s64 n);
 511         s64 to_signed_8(cell obj);
 512         cell from_unsigned_8(u64 n);
 513         u64 to_unsigned_8(cell obj);
 514         float to_float(cell value);
 515         double to_double(cell value);
 516         inline void overflow_fixnum_add(fixnum x, fixnum y);
 517         inline void overflow_fixnum_subtract(fixnum x, fixnum y);
 518         inline void overflow_fixnum_multiply(fixnum x, fixnum y);
 519         inline cell from_signed_cell(fixnum x);
 520         inline cell from_unsigned_cell(cell x);
 521         inline cell allot_float(double n);
 522         inline bignum *float_to_bignum(cell tagged);
 523         inline double untag_float(cell tagged);
 524         inline double untag_float_check(cell tagged);
 525         inline fixnum float_to_fixnum(cell tagged);
 526         inline double fixnum_to_float(cell tagged);
 527
 528         // tagged
 529         template<typename Type> Type *untag_check(cell value);
 530
 531         // io
 532         void init_c_io();
 533         void io_error();
 534         FILE* safe_fopen(char *filename, char *mode);
 535         int safe_fgetc(FILE *stream);
 536         size_t safe_fread(void *ptr, size_t size, size_t nitems, FILE *stream);
 537         void safe_fputc(int c, FILE* stream);
 538         size_t safe_fwrite(void *ptr, size_t size, size_t nitems, FILE *stream);
 539         int safe_ftell(FILE *stream);
 540         void safe_fseek(FILE *stream, off_t offset, int whence);
 541         void safe_fflush(FILE *stream);
 542         void safe_fclose(FILE *stream);
 543         void primitive_fopen();
 544         FILE *pop_file_handle();
 545         void primitive_fgetc();
 546         void primitive_fread();
 547         void primitive_fputc();
 548         void primitive_fwrite();
 549         void primitive_ftell();
 550         void primitive_fseek();
 551         void primitive_fflush();
 552         void primitive_fclose();
 553
 554         // code_block
 555         cell compute_entry_point_address(cell obj);
 556         cell compute_entry_point_pic_address(word *w, cell tagged_quot);
 557         cell compute_entry_point_pic_address(cell w_);
 558         cell compute_entry_point_pic_tail_address(cell w_);
 559         cell code_block_owner(code_block *compiled);
 560         void update_word_references(code_block *compiled, bool reset_inline_caches);
 561         void undefined_symbol();
 562         cell compute_dlsym_address(array *literals, cell index);
 563 #ifdef FACTOR_PPC
 564         cell compute_dlsym_toc_address(array *literals, cell index);
 565 #endif
 566         cell compute_vm_address(cell arg);
 567         void store_external_address(instruction_operand op);
 568         cell compute_here_address(cell arg, cell offset, code_block *compiled);
 569         void initialize_code_block(code_block *compiled, cell literals);
 570         void initialize_code_block(code_block *compiled);
 571         void fixup_labels(array *labels, code_block *compiled);
 572         code_block *allot_code_block(cell size, code_block_type type);
 573         code_block *add_code_block(code_block_type type, cell code_, cell labels_, cell owner_, cell relocation_, cell parameters_, cell literals_);
 574
 575         //code heap
 576         inline void check_code_pointer(cell ptr) { }
 577
 578         template<typename Iterator> void each_code_block(Iterator &iter)
 579         {
 580                 code->allocator->iterate(iter);
 581         }
 582
 583         void init_code_heap(cell size);
 584         void update_code_heap_words(bool reset_inline_caches);
 585         void initialize_code_blocks();
 586         void primitive_modify_code_heap();
 587         code_heap_room code_room();
 588         void primitive_code_room();
 589         void primitive_strip_stack_traces();
 590         cell code_blocks();
 591         void primitive_code_blocks();
 592
 593         // callbacks
 594         void init_callbacks(cell size);
 595         void primitive_callback();
 596
 597         // image
 598         void init_objects(image_header *h);
 599         void load_data_heap(FILE *file, image_header *h, vm_parameters *p);
 600         void load_code_heap(FILE *file, image_header *h, vm_parameters *p);
 601         bool save_image(const vm_char *saving_filename, const vm_char *filename);
 602         void primitive_save_image();
 603         void primitive_save_image_and_exit();
 604         void fixup_data(cell data_offset, cell code_offset);
 605         void fixup_code(cell data_offset, cell code_offset);
 606         void load_image(vm_parameters *p);
 607
 608         // callstack
 609         template<typename Iterator> void iterate_callstack_object(callstack *stack_, Iterator &iterator);
 610         void check_frame(stack_frame *frame);
 611         callstack *allot_callstack(cell size);
 612         stack_frame *second_from_top_stack_frame(context *ctx);
 613         cell capture_callstack(context *ctx);
 614         void primitive_callstack();
 615         void primitive_callstack_for();
 616         code_block *frame_code(stack_frame *frame);
 617         code_block_type frame_type(stack_frame *frame);
 618         cell frame_executing(stack_frame *frame);
 619         cell frame_executing_quot(stack_frame *frame);
 620         stack_frame *frame_successor(stack_frame *frame);
 621         cell frame_scan(stack_frame *frame);
 622         cell frame_offset(stack_frame *frame);
 623         void set_frame_offset(stack_frame *frame, cell offset);
 624         void primitive_callstack_to_array();
 625         stack_frame *innermost_stack_frame(stack_frame *bottom, stack_frame *top);
 626         void primitive_innermost_stack_frame_executing();
 627         void primitive_innermost_stack_frame_scan();
 628         void primitive_set_innermost_stack_frame_quot();
 629         void primitive_callstack_bounds();
 630         template<typename Iterator> void iterate_callstack(context *ctx, Iterator &iterator);
 631
 632         // cpu-*
 633         void dispatch_signal_handler(cell *sp, cell *pc, cell newpc);
 634
 635         // alien
 636         char *pinned_alien_offset(cell obj);
 637         cell allot_alien(cell delegate_, cell displacement);
 638         cell allot_alien(void *address);
 639         void primitive_displaced_alien();
 640         void primitive_alien_address();
 641         void *alien_pointer();
 642         void primitive_dlopen();
 643         void primitive_dlsym();
 644         void primitive_dlsym_raw();
 645         void primitive_dlclose();
 646         void primitive_dll_validp();
 647         char *alien_offset(cell obj);
 648
 649         // quotations
 650         void primitive_jit_compile();
 651         code_block *lazy_jit_compile_block();
 652         void primitive_array_to_quotation();
 653         void primitive_quotation_code();
 654         void set_quot_entry_point(quotation *quot, code_block *code);
 655         code_block *jit_compile_quot(cell owner_, cell quot_, bool relocating);
 656         void jit_compile_quot(cell quot_, bool relocating);
 657         fixnum quot_code_offset_to_scan(cell quot_, cell offset);
 658         cell lazy_jit_compile(cell quot);
 659         bool quot_compiled_p(quotation *quot);
 660         void primitive_quot_compiled_p();
 661         cell find_all_quotations();
 662         void initialize_all_quotations();
 663
 664         // dispatch
 665         cell search_lookup_alist(cell table, cell klass);
 666         cell search_lookup_hash(cell table, cell klass, cell hashcode);
 667         cell nth_superclass(tuple_layout *layout, fixnum echelon);
 668         cell nth_hashcode(tuple_layout *layout, fixnum echelon);
 669         cell lookup_tuple_method(cell obj, cell methods);
 670         cell lookup_method(cell obj, cell methods);
 671         void primitive_lookup_method();
 672         cell object_class(cell obj);
 673         cell method_cache_hashcode(cell klass, array *array);
 674         void update_method_cache(cell cache, cell klass, cell method);
 675         void primitive_mega_cache_miss();
 676         void primitive_reset_dispatch_stats();
 677         void primitive_dispatch_stats();
 678
 679         // inline cache
 680         void init_inline_caching(int max_size);
 681         void deallocate_inline_cache(cell return_address);
 682         cell determine_inline_cache_type(array *cache_entries);
 683         void update_pic_count(cell type);
 684         code_block *compile_inline_cache(fixnum index,cell generic_word_,cell methods_,cell cache_entries_,bool tail_call_p);
 685         void *megamorphic_call_stub(cell generic_word);
 686         cell inline_cache_size(cell cache_entries);
 687         cell add_inline_cache_entry(cell cache_entries_, cell klass_, cell method_);
 688         void update_pic_transitions(cell pic_size);
 689         void *inline_cache_miss(cell return_address);
 690
 691         // entry points
 692         void c_to_factor(cell quot);
 693         template<typename Func> Func get_entry_point(cell n);
 694         void unwind_native_frames(cell quot, stack_frame *to);
 695         cell get_fpu_state();
 696         void set_fpu_state(cell state);
 697
 698         // factor
 699         void default_parameters(vm_parameters *p);
 700         bool factor_arg(const vm_char *str, const vm_char *arg, cell *value);
 701         void init_parameters_from_args(vm_parameters *p, int argc, vm_char **argv);
 702         void prepare_boot_image();
 703         void init_factor(vm_parameters *p);
 704         void pass_args_to_factor(int argc, vm_char **argv);
 705         void start_factor(vm_parameters *p);
 706         void stop_factor();
 707         void start_embedded_factor(vm_parameters *p);
 708         void start_standalone_factor(int argc, vm_char **argv);
 709         char *factor_eval_string(char *string);
 710         void factor_eval_free(char *result);
 711         void factor_yield();
 712         void factor_sleep(long us);
 713
 714         // os-*
 715         void primitive_existsp();
 716         void move_file(const vm_char *path1, const vm_char *path2);
 717         void init_ffi();
 718         void ffi_dlopen(dll *dll);
 719         void *ffi_dlsym(dll *dll, symbol_char *symbol);
 720         void *ffi_dlsym_raw(dll *dll, symbol_char *symbol);
 721  #ifdef FACTOR_PPC
 722         void *ffi_dlsym_toc(dll *dll, symbol_char *symbol);
 723  #endif
 724         void ffi_dlclose(dll *dll);
 725         void c_to_factor_toplevel(cell quot);
 726         void init_signals();
 727         void start_sampling_profiler_timer();
 728         void end_sampling_profiler_timer();
 729
 730         // os-windows
 731   #if defined(WINDOWS)
 732         HANDLE sampler_thread;
 733         void sampler_thread_loop();
 734
 735         const vm_char *vm_executable_path();
 736         const vm_char *default_image_path();
 737         void windows_image_path(vm_char *full_path, vm_char *temp_path, unsigned int length);
 738         BOOL windows_stat(vm_char *path);
 739
 740         void open_console();
 741         LONG exception_handler(PEXCEPTION_RECORD e, void *frame, PCONTEXT c, void *dispatch);
 742
 743   #else  // UNIX
 744         void dispatch_signal(void *uap, void (handler)());
 745         void enqueue_safepoint_signal(cell signal);
 746         void unix_init_signals();
 747   #endif
 748
 749   #ifdef __APPLE__
 750         void call_fault_handler(exception_type_t exception, exception_data_type_t code, MACH_EXC_STATE_TYPE *exc_state, MACH_THREAD_STATE_TYPE *thread_state, MACH_FLOAT_STATE_TYPE *float_state);
 751   #endif
 752
 753         factor_vm();
 754         ~factor_vm();
 755 };
 756
 757 }