// basis/vm/vm.factor
// basis/compiler/constants/constants.factor
- /* Current context */
+ // Current context
context* ctx;
- /* Spare context -- for callbacks */
+ // Spare context -- for callbacks
context* spare_ctx;
- /* New objects are allocated here, use the data->nursery reference
- instead from c++ code. */
+ // New objects are allocated here, use the data->nursery reference
+ // instead from c++ code.
bump_allocator nursery;
- /* Add this to a shifted address to compute write barrier offsets */
+ // Add this to a shifted address to compute write barrier offsets
cell cards_offset;
cell decks_offset;
- /* cdecl signal handler address, used by signal handler subprimitives */
+ // cdecl signal handler address, used by signal handler subprimitives
cell signal_handler_addr;
- /* are we handling a memory error? used to detect double faults */
- cell faulting_p;
+ // are we handling a memory error? used to detect double faults
+ bool faulting_p;
- /* Various special objects, accessed by special-object and
- set-special-object primitives */
+ // Various special objects, accessed by special-object and
+ // set-special-object primitives
cell special_objects[special_object_count];
// THESE FIELDS ARE ACCESSED DIRECTLY FROM FACTOR.
// ^^^^^^
//
- /* Handle to the main thread we run in */
+ // Handle to the main thread we run in
THREADHANDLE thread;
- /* Data stack and retain stack sizes */
+ // Data stack and retain stack sizes
cell datastack_size, retainstack_size, callstack_size;
- /* Stack of callback IDs */
+ // Stack of callback IDs
std::vector<int> callback_ids;
- /* Next callback ID */
+ // Next callback ID
int callback_id;
- /* List of callback function descriptors for PPC */
+ // List of callback function descriptors for PPC
std::list<void**> function_descriptors;
- /* Pooling unused contexts to make context allocation cheaper */
+ // Pooling unused contexts to make context allocation cheaper
std::list<context*> unused_contexts;
- /* Active contexts, for tracing by the GC */
+ // Active contexts, for tracing by the GC
std::set<context*> active_contexts;
- /* Canonical truth value. In Factor, 't' */
- cell true_object;
-
- /* External entry points */
+ // External entry points
c_to_factor_func_type c_to_factor_func;
- /* Is profiling enabled? */
- volatile cell sampling_profiler_p;
+ // Is profiling enabled?
+ volatile bool sampling_profiler_p;
fixnum samples_per_second;
- /* Global variables used to pass fault handler state from signal handler
- to VM */
+ // Global variables used to pass fault handler state from signal handler
+ // to VM
bool signal_resumable;
cell signal_number;
cell signal_fault_addr;
cell signal_fault_pc;
unsigned int signal_fpu_status;
- /* Pipe used to notify Factor multiplexer of signals */
+ // Pipe used to notify Factor multiplexer of signals
int signal_pipe_input, signal_pipe_output;
- /* State kept by the sampling profiler */
+ // State kept by the sampling profiler
std::vector<profiling_sample> samples;
- std::vector<cell> sample_callstacks;
+ volatile profiling_sample current_sample;
- /* GC is off during heap walking */
+ // GC is off during heap walking
bool gc_off;
- /* Data heap */
+ // Data heap
data_heap* data;
- /* Code heap */
+ // Code heap
code_heap* code;
- /* Pinned callback stubs */
+ // Pinned callback stubs
callback_heap* callbacks;
- /* Only set if we're performing a GC */
+ // Only set if we're performing a GC
gc_state* current_gc;
- volatile cell current_gc_p;
+ volatile bool current_gc_p;
- /* Set if we're in the jit */
+ // Set if we're in the jit
volatile fixnum current_jit_count;
- /* Mark stack */
+ // Mark stack used for mark & sweep GC
std::vector<cell> mark_stack;
- /* If not NULL, we push GC events here */
+ // If not NULL, we push GC events here
std::vector<gc_event>* gc_events;
- /* If a runtime function needs to call another function which potentially
- allocates memory, it must wrap any references to the data and code
- heaps with data_root and code_root smart pointers, which register
- themselves here. See data_roots.hpp and code_roots.hpp */
+ // If a runtime function needs to call another function which potentially
+ // allocates memory, it must wrap any references to the data and code
+ // heaps with data_root and code_root smart pointers, which register
+ // themselves here. See data_roots.hpp and code_roots.hpp
std::vector<cell*> data_roots;
std::vector<code_root*> code_roots;
- /* Debugger */
+ // Debugger
bool fep_p;
bool fep_help_was_shown;
bool fep_disabled;
bool full_output;
- /* Canonical bignums */
- cell bignum_zero;
- cell bignum_pos_one;
- cell bignum_neg_one;
-
- /* Method dispatch statistics */
+ // Method dispatch statistics
dispatch_statistics dispatch_stats;
- /* Number of entries in a polymorphic inline cache */
+ // Number of entries in a polymorphic inline cache
cell max_pic_size;
- /* Incrementing object counter for identity hashing */
+ // Incrementing object counter for identity hashing
cell object_counter;
- /* Sanity check to ensure that monotonic counter doesn't decrease */
+ // Sanity check to ensure that monotonic counter doesn't decrease
uint64_t last_nano_count;
- /* Stack for signal handlers, only used on Unix */
+ // Stack for signal handlers, only used on Unix
segment* signal_callstack_seg;
- /* Are we already handling a fault? Used to catch double memory faults */
+ // Are we already handling a fault? Used to catch double memory faults
static bool fatal_erroring_p;
- /* Safepoint state */
- volatile safepoint_state safepoint;
+ // Two fep_p variants, one might be redundant.
+ volatile bool safepoint_fep_p;
+
+ // Allow Ctrl-Break a busy loop in the Listener, only used on Windows
+ volatile bool stop_on_ctrl_break;
// contexts
context* new_context();
void init_context(context* ctx);
void delete_context();
- void init_contexts(cell datastack_size_, cell retainstack_size_,
- cell callstack_size_);
- void delete_contexts();
cell begin_callback(cell quot);
void end_callback();
void primitive_current_callback();
void primitive_set_context_object();
cell stack_to_array(cell bottom, cell top, vm_error_type error);
cell datastack_to_array(context* ctx);
- void primitive_datastack();
void primitive_datastack_for();
cell retainstack_to_array(context* ctx);
- void primitive_retainstack();
void primitive_retainstack_for();
- cell array_to_stack(array* array, cell bottom);
- void set_datastack(context* ctx, array* array);
void primitive_set_datastack();
- void set_retainstack(context* ctx, array* array);
void primitive_set_retainstack();
void primitive_check_datastack();
void primitive_load_locals();
void primitive_special_object();
void primitive_set_special_object();
void primitive_identity_hashcode();
- void compute_identity_hashcode(object* obj);
void primitive_compute_identity_hashcode();
- cell object_size(cell tagged);
- cell clone_object(cell obj_);
void primitive_clone();
void primitive_become();
// sampling_profiler
- void clear_samples();
void record_sample(bool prolog_p);
- void record_callstack_sample(cell* begin, cell* end, bool prolog_p);
void start_sampling_profiler(fixnum rate);
void end_sampling_profiler();
- void set_sampling_profiler(fixnum rate);
- void primitive_sampling_profiler();
+ void set_profiling(fixnum rate);
+ void primitive_set_profiling();
void primitive_get_samples();
- void primitive_clear_samples();
+ array* allot_growarr();
+ void growarr_add(array *growarr_, cell value);
// errors
void general_error(vm_error_type error, cell arg1, cell arg2);
void type_error(cell type, cell tagged);
- void not_implemented_error();
- void verify_memory_protection_error(cell addr);
- void memory_protection_error(cell pc, cell addr);
+ void set_memory_protection_error(cell fault_addr, cell fault_pc);
void divide_by_zero_error();
- void primitive_unimplemented();
- void memory_signal_handler_impl();
- void synchronous_signal_handler_impl();
- void fp_signal_handler_impl();
// bignum
int bignum_equal_p(bignum* x, bignum* y);
void bignum_destructive_unnormalization(bignum* bn, int shift_right);
bignum_digit_type bignum_digit_divide(
bignum_digit_type uh, bignum_digit_type ul, bignum_digit_type v,
- bignum_digit_type* q) /* return value */;
+ bignum_digit_type* q); // return value
bignum_digit_type bignum_digit_divide_subtract(bignum_digit_type v1,
bignum_digit_type v2,
bignum_digit_type guess,
bignum* bignum_gcd(bignum* a_, bignum* b_);
//data heap
- void init_card_decks();
void set_data_heap(data_heap* data_);
- void init_data_heap(cell young_size, cell aging_size, cell tenured_size);
void primitive_size();
data_heap_room data_room();
void primitive_data_room();
- void begin_scan();
- void end_scan();
cell instances(cell type);
void primitive_all_instances();
template <typename Iterator> inline void each_object(Iterator& iterator) {
- /* The nursery can't be iterated because there may be gaps between
- the objects (see factor_vm::reallot_array) so we require it to
- be empty first. */
+ // The nursery can't be iterated because there may be gaps between
+ // the objects (see factor_vm::reallot_array) so we require it to
+ // be empty first.
FACTOR_ASSERT(data->nursery->occupied_space() == 0);
gc_off = true;
gc_off = false;
}
- /* the write barrier must be called any time we are potentially storing a
- pointer from an older generation to a younger one */
+ template <typename Iterator>
+ inline void each_object_each_slot(Iterator& iterator) {
+ auto each_object_func = [&](object* obj) {
+ auto each_slot_func = [&](cell* slot) {
+ iterator(obj, slot);
+ };
+ obj->each_slot(each_slot_func);
+ };
+ each_object(each_object_func);
+ }
+
+ // the write barrier must be called any time we are potentially storing a
+ // pointer from an older generation to a younger one
inline void write_barrier(cell* slot_ptr) {
- *(char*)(cards_offset + ((cell)slot_ptr >> card_bits)) = card_mark_mask;
- *(char*)(decks_offset + ((cell)slot_ptr >> deck_bits)) = card_mark_mask;
+ *(unsigned char*)(cards_offset + ((cell)slot_ptr >> card_bits)) = card_mark_mask;
+ *(unsigned char*)(decks_offset + ((cell)slot_ptr >> deck_bits)) = card_mark_mask;
}
inline void write_barrier(object* obj, cell size) {
void check_data_heap();
// gc
- void end_gc();
void set_current_gc_op(gc_op op);
void start_gc_again();
void collect_nursery();
void collect_aging();
void collect_to_tenured();
- void update_code_roots_for_sweep();
void update_code_roots_for_compaction();
void collect_mark_impl();
void collect_sweep_impl();
void collect_full();
void collect_compact_impl();
void collect_compact();
- void collect_growing_heap(cell requested_size);
+ void collect_growing_data_heap(cell requested_size);
void gc(gc_op op, cell requested_size);
void primitive_minor_gc();
void primitive_full_gc();
object* allot_object(cell type, cell size);
object* allot_large_object(cell type, cell size);
- /* Allocates memory */
+ // Allocates memory
template <typename Type> Type* allot(cell size) {
return (Type*)allot_object(Type::type_number, size);
}
void print_callstack_object(ostream& out, callstack* obj);
void dump_cell(ostream& out, cell x);
void dump_memory(ostream& out, cell from, cell to);
- template <typename Generation>
- void dump_generation(ostream& out, const char* name, Generation* gen);
- void dump_generations(ostream& out);
+ void dump_memory_layout(ostream& out);
void dump_objects(ostream& out, cell type);
void dump_edges(ostream& out);
void find_data_references(ostream& out, cell look_for_);
void factorbug_usage(bool advanced_p);
void factorbug();
void primitive_die();
+ void primitive_enable_ctrl_break();
+ void primitive_disable_ctrl_break();
// arrays
inline void set_array_nth(array* array, cell slot, cell value);
// booleans
cell tag_boolean(cell untagged) {
- return (untagged ? true_object : false_object);
+ return untagged ? special_objects[OBJ_CANONICAL_TRUE] : false_object;
}
// byte arrays
void primitive_word_optimized_p();
void primitive_wrapper();
void jit_compile_word(cell word_, cell def_, bool relocating);
- cell find_all_words();
- void compile_all_words();
// math
void primitive_bignum_to_fixnum();
inline double fixnum_to_float(cell tagged);
// tagged
- template <typename Type> Type* untag_check(cell value);
+ template <typename Type> void check_tagged(tagged<Type> t) {
+ if (!t.type_p())
+ type_error(Type::type_number, t.value_);
+ }
+
+ template <typename Type> Type* untag_check(cell value) {
+ tagged<Type> t(value);
+ check_tagged(t);
+ return t.untagged();
+ }
// io
- void init_c_io();
void io_error_if_not_EINTR();
- FILE* safe_fopen(char* filename, char* mode);
+ FILE* safe_fopen(char* filename, const char* mode);
int safe_fgetc(FILE* stream);
size_t safe_fread(void* ptr, size_t size, size_t nitems, FILE* stream);
void safe_fputc(int c, FILE* stream);
size_t safe_fwrite(void* ptr, size_t size, size_t nitems, FILE* stream);
- int safe_ftell(FILE* stream);
+ off_t safe_ftell(FILE* stream);
void safe_fseek(FILE* stream, off_t offset, int whence);
void safe_fflush(FILE* stream);
- void safe_fclose(FILE* stream);
void primitive_fopen();
FILE* pop_file_handle();
FILE* peek_file_handle();
void primitive_fclose();
// code_block
- cell compute_entry_point_address(cell obj);
cell compute_entry_point_pic_address(word* w, cell tagged_quot);
cell compute_entry_point_pic_address(cell w_);
cell compute_entry_point_pic_tail_address(cell w_);
cell compute_external_address(instruction_operand op);
- cell code_block_owner(code_block* compiled);
void update_word_references(code_block* compiled, bool reset_inline_caches);
void undefined_symbol();
- cell compute_dlsym_address(array* literals, cell index);
-#ifdef FACTOR_PPC
- cell compute_dlsym_toc_address(array* literals, cell index);
-#endif
- cell compute_vm_address(cell arg);
+ cell compute_dlsym_address(array* literals, cell index, bool toc);
cell lookup_external_address(relocation_type rel_type,
code_block* compiled,
array* parameters,
cell index);
- cell compute_here_address(cell arg, cell offset, code_block* compiled);
void initialize_code_block(code_block* compiled, cell literals);
void initialize_code_block(code_block* compiled);
void fixup_labels(array* labels, code_block* compiled);
//code heap
template <typename Iterator> void each_code_block(Iterator& iter) {
- code->allocator->iterate(iter);
+ code->allocator->iterate(iter, no_fixup());
}
void update_code_heap_words(bool reset_inline_caches);
- void initialize_code_blocks();
void primitive_modify_code_heap();
void primitive_code_room();
void primitive_strip_stack_traces();
- cell code_blocks();
void primitive_code_blocks();
// callbacks
- void init_callbacks(cell size);
void primitive_free_callback();
void primitive_callback();
void primitive_callback_room();
// image
- void init_objects(image_header* h);
void load_data_heap(FILE* file, image_header* h, vm_parameters* p);
void load_code_heap(FILE* file, image_header* h, vm_parameters* p);
bool save_image(const vm_char* saving_filename, const vm_char* filename);
void primitive_save_image();
- void fixup_data(cell data_offset, cell code_offset);
- void fixup_code(cell data_offset, cell code_offset);
- FILE* open_image(vm_parameters* p);
+ void fixup_heaps(cell data_offset, cell code_offset);
void load_image(vm_parameters* p);
bool read_embedded_image_footer(FILE* file, embedded_image_footer* footer);
bool embedded_image_p();
callstack* allot_callstack(cell size);
cell second_from_top_stack_frame(context* ctx);
cell capture_callstack(context* ctx);
- void primitive_callstack();
void primitive_callstack_for();
- cell frame_predecessor(cell frame_top);
void primitive_callstack_to_array();
void primitive_innermost_stack_frame_executing();
void primitive_innermost_stack_frame_scan();
// cpu-*
void dispatch_signal_handler(cell* sp, cell* pc, cell newpc);
+#if defined(FACTOR_X86) || defined(FACTOR_64)
+ void dispatch_non_resumable_signal(cell* sp, cell* pc,
+ cell handler,
+ cell limit);
+ void dispatch_resumable_signal(cell* sp, cell* pc, cell handler);
+#endif
// alien
char* pinned_alien_offset(cell obj);
cell allot_alien(cell delegate_, cell displacement);
- cell allot_alien(void* address);
+ cell allot_alien(cell address);
void primitive_displaced_alien();
void primitive_alien_address();
void* alien_pointer();
cell lazy_jit_compile(cell quot);
bool quotation_compiled_p(quotation* quot);
void primitive_quotation_compiled_p();
- void initialize_all_quotations();
// dispatch
- cell search_lookup_alist(cell table, cell klass);
- cell search_lookup_hash(cell table, cell klass, cell hashcode);
- cell nth_superclass(tuple_layout* layout, fixnum echelon);
- cell nth_hashcode(tuple_layout* layout, fixnum echelon);
cell lookup_tuple_method(cell obj, cell methods);
cell lookup_method(cell obj, cell methods);
void primitive_lookup_method();
cell object_class(cell obj);
- cell method_cache_hashcode(cell klass, array* array);
void update_method_cache(cell cache, cell klass, cell method);
void primitive_mega_cache_miss();
void primitive_reset_dispatch_stats();
void primitive_dispatch_stats();
// inline cache
- void init_inline_caching(int max_size);
void deallocate_inline_cache(cell return_address);
- cell determine_inline_cache_type(array* cache_entries);
void update_pic_count(cell type);
- code_block* compile_inline_cache(fixnum index, cell generic_word_,
- cell methods_, cell cache_entries_,
- bool tail_call_p);
- cell inline_cache_size(cell cache_entries);
cell add_inline_cache_entry(cell cache_entries_, cell klass_, cell method_);
void update_pic_transitions(cell pic_size);
cell inline_cache_miss(cell return_address);
cell get_fpu_state();
void set_fpu_state(cell state);
+ // safepoints
+ void handle_safepoint(cell pc);
+ void enqueue_samples(cell samples, cell pc, bool foreign_thread_p);
+ void enqueue_fep();
+
// factor
- void default_parameters(vm_parameters* p);
- bool factor_arg(const vm_char* str, const vm_char* arg, cell* value);
- void init_parameters_from_args(vm_parameters* p, int argc, vm_char** argv);
void prepare_boot_image();
void init_factor(vm_parameters* p);
void pass_args_to_factor(int argc, vm_char** argv);
- void start_factor(vm_parameters* p);
void stop_factor();
- void start_embedded_factor(vm_parameters* p);
void start_standalone_factor(int argc, vm_char** argv);
char* factor_eval_string(char* string);
void factor_eval_free(char* result);
// os-*
void primitive_existsp();
- void move_file(const vm_char* path1, const vm_char* path2);
void init_ffi();
void ffi_dlopen(dll* dll);
- void* ffi_dlsym(dll* dll, symbol_char* symbol);
- void* ffi_dlsym_raw(dll* dll, symbol_char* symbol);
-#ifdef FACTOR_PPC
- void* ffi_dlsym_toc(dll* dll, symbol_char* symbol);
-#endif
+ cell ffi_dlsym(dll* dll, symbol_char* symbol);
+ cell ffi_dlsym_raw(dll* dll, symbol_char* symbol);
void ffi_dlclose(dll* dll);
void c_to_factor_toplevel(cell quot);
void init_signals();
// os-windows
#if defined(WINDOWS)
+ /* Id of the main thread we run in. Used for Ctrl-Break handling. */
+ DWORD thread_id;
+
+ HANDLE ctrl_break_thread;
+
HANDLE sampler_thread;
void sampler_thread_loop();
const vm_char* vm_executable_path();
const vm_char* default_image_path();
- void windows_image_path(vm_char* full_path, vm_char* temp_path,
- unsigned int length);
BOOL windows_stat(vm_char* path);
LONG exception_handler(PEXCEPTION_RECORD e, void* frame, PCONTEXT c,
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