600 lines
16 KiB
C++
600 lines
16 KiB
C++
#include "master.hpp"
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using namespace std;
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namespace factor {
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bool factor_print_p = true;
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ostream& operator<<(ostream& out, const string* str) {
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for (cell i = 0; i < string_capacity(str); i++)
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out << (char)str->data()[i];
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return out;
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}
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void factor_vm::print_word(ostream& out, word* word, cell nesting) {
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if (tagged<object>(word->vocabulary).type_p(STRING_TYPE))
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out << untag<string>(word->vocabulary) << ":";
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if (tagged<object>(word->name).type_p(STRING_TYPE))
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out << untag<string>(word->name);
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else {
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out << "#<not a string: ";
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print_nested_obj(out, word->name, nesting);
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out << ">";
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}
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}
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void factor_vm::print_factor_string(ostream& out, string* str) {
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out << '"' << str << '"';
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}
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void factor_vm::print_array(ostream& out, array* array, cell nesting) {
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cell length = array_capacity(array);
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cell i;
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bool trimmed;
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if (length > 10 && !full_output) {
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trimmed = true;
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length = 10;
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} else
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trimmed = false;
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for (i = 0; i < length; i++) {
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out << " ";
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print_nested_obj(out, array_nth(array, i), nesting);
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}
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if (trimmed)
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out << "...";
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}
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void factor_vm::print_alien(ostream& out, alien* alien, cell nesting) {
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if (to_boolean(alien->expired))
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out << "#<expired alien>";
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else if (to_boolean(alien->base)) {
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out << "#<displaced alien " << alien->displacement << "+";
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print_nested_obj(out, alien->base, nesting);
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out << ">";
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} else {
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out << "#<alien " << (void*)alien->address << ">";
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}
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}
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void factor_vm::print_byte_array(ostream& out, byte_array* array, cell nesting) {
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cell length = array->capacity;
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cell i;
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bool trimmed;
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unsigned char* data = array->data<unsigned char>();
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if (length > 16 && !full_output) {
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trimmed = true;
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length = 16;
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} else
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trimmed = false;
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for (i = 0; i < length; i++) {
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out << " " << (unsigned) data[i];
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}
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if (trimmed)
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out << "...";
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}
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void factor_vm::print_tuple(ostream& out, tuple* tuple, cell nesting) {
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tuple_layout* layout = untag<tuple_layout>(tuple->layout);
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cell length = to_cell(layout->size);
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out << " ";
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print_nested_obj(out, layout->klass, nesting);
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bool trimmed;
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if (length > 10 && !full_output) {
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trimmed = true;
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length = 10;
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} else
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trimmed = false;
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for (cell i = 0; i < length; i++) {
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out << " ";
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print_nested_obj(out, tuple->data()[i], nesting);
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}
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if (trimmed)
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out << "...";
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}
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void factor_vm::print_nested_obj(ostream& out, cell obj, fixnum nesting) {
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if (nesting <= 0 && !full_output) {
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out << " ... ";
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return;
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}
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quotation* quot;
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switch (tagged<object>(obj).type()) {
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case FIXNUM_TYPE:
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out << untag_fixnum(obj);
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break;
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case FLOAT_TYPE:
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out << untag_float(obj);
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break;
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case WORD_TYPE:
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print_word(out, untag<word>(obj), nesting - 1);
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break;
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case STRING_TYPE:
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print_factor_string(out, untag<string>(obj));
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break;
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case F_TYPE:
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out << "f";
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break;
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case TUPLE_TYPE:
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out << "T{";
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print_tuple(out, untag<tuple>(obj), nesting - 1);
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out << " }";
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break;
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case WRAPPER_TYPE:
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out << "W{ ";
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print_nested_obj(out, untag<wrapper>(obj)->object, nesting - 1);
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out << " }";
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break;
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case BYTE_ARRAY_TYPE:
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out << "B{";
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print_byte_array(out, untag<byte_array>(obj), nesting - 1);
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out << " }";
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break;
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case ARRAY_TYPE:
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out << "{";
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print_array(out, untag<array>(obj), nesting - 1);
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out << " }";
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break;
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case QUOTATION_TYPE:
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out << "[";
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quot = untag<quotation>(obj);
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print_array(out, untag<array>(quot->array), nesting - 1);
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out << " ]";
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break;
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case ALIEN_TYPE:
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print_alien(out, untag<alien>(obj), nesting - 1);
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break;
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default:
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out << "#<" << type_name(tagged<object>(obj).type()) << " @ ";
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out << (void*)obj << ">";
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break;
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}
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out << flush;
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}
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void factor_vm::print_obj(ostream& out, cell obj) {
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print_nested_obj(out, obj, 10);
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}
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void factor_vm::print_objects(ostream& out, cell* start, cell* end) {
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for (; start <= end; start++) {
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print_obj(out, *start);
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cout << endl;
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}
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}
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void factor_vm::print_datastack(ostream& out) {
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out << "==== DATA STACK:" << endl;
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if (ctx)
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print_objects(out,
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(cell*)ctx->datastack_seg->start,
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(cell*)ctx->datastack);
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else
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out << "*** Context not initialized" << endl;
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}
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void factor_vm::print_retainstack(ostream& out) {
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out << "==== RETAIN STACK:" << endl;
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if (ctx)
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print_objects(out,
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(cell*)ctx->retainstack_seg->start,
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(cell*)ctx->retainstack);
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else
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out << "*** Context not initialized" << endl;
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}
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struct stack_frame_printer {
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factor_vm* parent;
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ostream& out;
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explicit stack_frame_printer(factor_vm* parent, ostream& out)
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: parent(parent), out(out) {}
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void operator()(cell frame_top, cell size, code_block* owner, cell addr) {
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out << endl;
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out << "frame: " << (void*)frame_top << " size " << size << endl;
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out << "executing: ";
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parent->print_obj(out, owner->owner);
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out << endl;
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out << "scan: ";
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parent->print_obj(out, owner->scan(parent, addr));
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out << endl;
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out << "word/quot addr: ";
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out << hex << owner->owner << dec;
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out << endl;
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out << "word/quot xt: ";
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out << hex << owner->entry_point() << dec;
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out << endl;
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out << "return address: ";
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out << hex << addr << dec;
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out << endl;
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}
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};
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void factor_vm::print_callstack(ostream& out) {
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out << "==== CALL STACK:" << endl;
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if (ctx) {
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stack_frame_printer printer(this, out);
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iterate_callstack(ctx, printer);
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} else
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out << "*** Context not initialized" << endl;
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}
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void factor_vm::print_callstack_object(ostream& out, callstack* obj) {
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stack_frame_printer printer(this, out);
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iterate_callstack_object(obj, printer);
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}
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struct padded_address {
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cell value;
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explicit padded_address(cell value) : value(value) {}
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};
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ostream& operator<<(ostream& out, const padded_address& value) {
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char prev = out.fill('0');
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out.width(sizeof(cell) * 2);
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out << hex << value.value << dec;
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out.fill(prev);
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return out;
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}
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void factor_vm::dump_cell(ostream& out, cell x) {
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out << padded_address(x) << ": ";
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x = *(cell*)x;
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out << padded_address(x) << " tag " << TAG(x) << endl;
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}
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void factor_vm::dump_memory(ostream& out, cell from, cell to) {
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from = UNTAG(from);
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for (; from <= to; from += sizeof(cell))
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dump_cell(out, from);
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}
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template <typename Generation>
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void factor_vm::dump_generation(ostream& out, const char* name, Generation* gen) {
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out << name << ": ";
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out << "Start=" << gen->start;
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out << ", size=" << gen->size;
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out << ", end=" << gen->end;
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out << endl;
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}
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void factor_vm::dump_generations(ostream& out) {
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out << hex;
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dump_generation(out, "Nursery", &nursery);
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dump_generation(out, "Aging", data->aging);
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dump_generation(out, "Tenured", data->tenured);
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out << "Cards:";
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out << "base=" << (cell)data->cards << ", ";
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out << "size=" << (cell)(data->cards_end - data->cards) << endl;
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out << dec;
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}
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struct object_dumper {
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factor_vm* parent;
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cell type;
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ostream& out;
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object_dumper(factor_vm* parent, cell type, ostream& out)
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: parent(parent), type(type), out(out) {}
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void operator()(object* obj) {
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if (type == TYPE_COUNT || obj->type() == type) {
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out << padded_address((cell)obj) << " ";
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parent->print_nested_obj(out, tag_dynamic(obj), 2);
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out << endl;
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}
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}
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};
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void factor_vm::dump_objects(ostream& out, cell type) {
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primitive_full_gc();
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object_dumper dumper(this, type, out);
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each_object(dumper);
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}
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struct find_data_reference_slot_visitor {
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cell look_for;
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object* obj;
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factor_vm* parent;
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ostream& out;
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find_data_reference_slot_visitor(cell look_for,
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object* obj,
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factor_vm* parent,
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ostream& out)
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: look_for(look_for), obj(obj), parent(parent), out(out) {}
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void operator()(cell* scan) {
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if (look_for == *scan) {
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out << padded_address((cell)obj) << " ";
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parent->print_nested_obj(out, tag_dynamic(obj), 2);
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out << endl;
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}
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}
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};
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struct dump_edges_slot_visitor {
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object* obj;
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factor_vm* parent;
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ostream& out;
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dump_edges_slot_visitor(cell, object* obj, factor_vm* parent, ostream& out)
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: obj(obj), parent(parent), out(out) {}
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void operator()(cell* scan) {
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if (TAG(*scan) > F_TYPE)
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out << (void*)tag_dynamic(obj) << " ==> " << (void*)*scan << endl;
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}
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};
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template <typename SlotVisitor> struct data_reference_object_visitor {
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cell look_for;
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factor_vm* parent;
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ostream& out;
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data_reference_object_visitor(cell look_for, factor_vm* parent, ostream& out)
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: look_for(look_for), parent(parent), out(out) {}
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void operator()(object* obj) {
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SlotVisitor visitor(look_for, obj, parent, out);
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obj->each_slot(visitor);
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}
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};
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void factor_vm::find_data_references(ostream& out, cell look_for) {
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data_reference_object_visitor<find_data_reference_slot_visitor>
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visitor(look_for, this, out);
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each_object(visitor);
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}
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void factor_vm::dump_edges(ostream& out) {
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data_reference_object_visitor<dump_edges_slot_visitor> visitor(0, this, out);
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each_object(visitor);
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}
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struct code_block_printer {
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factor_vm* parent;
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ostream& out;
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cell reloc_size, parameter_size;
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explicit code_block_printer(factor_vm* parent, ostream& out)
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: parent(parent), out(out), reloc_size(0), parameter_size(0) {}
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void operator()(code_block* scan, cell size) {
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const char* status;
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if (scan->free_p())
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status = "free";
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else {
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reloc_size += parent->object_size(scan->relocation);
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parameter_size += parent->object_size(scan->parameters);
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if (parent->code->allocator->state.marked_p((cell)scan))
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status = "marked";
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else
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status = "allocated";
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out << hex << (cell)scan << dec << " ";
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out << hex << size << dec << " ";
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out << status << " ";
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out << "stack frame " << scan->stack_frame_size();
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out << endl;
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}
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}
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};
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/* Dump all code blocks for debugging */
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void factor_vm::dump_code_heap(ostream& out) {
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code_block_printer printer(this, out);
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code->allocator->iterate(printer);
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out << printer.reloc_size << " bytes used by relocation tables" << endl;
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out << printer.parameter_size << " bytes used by parameter tables" << endl;
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}
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void factor_vm::factorbug_usage(bool advanced_p) {
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cout << "Basic commands:" << endl;
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#ifdef WINDOWS
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cout << " q ^Z -- quit Factor" << endl;
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#else
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cout << " q ^D -- quit Factor" << endl;
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#endif
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cout << " c -- continue executing Factor - NOT SAFE"
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<< endl;
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cout << " t -- throw exception in Factor - NOT SAFE"
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<< endl;
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cout << " .s .r .c -- print data, retain, call stacks"
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<< endl;
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if (advanced_p) {
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cout << " help -- reprint this message" << endl;
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cout << "Advanced commands:" << endl;
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cout << " e -- dump environment" << endl;
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cout << " d <addr> <count> -- dump memory" << endl;
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cout << " u <addr> -- dump object at tagged <addr>"
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<< endl;
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cout << " . <addr> -- print object at tagged <addr>"
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<< endl;
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cout << " g -- dump generations" << endl;
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cout << " ds dr -- dump data, retain stacks" << endl;
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cout << " trim -- toggle output trimming" << endl;
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cout << " data -- data heap dump" << endl;
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cout << " words -- words dump" << endl;
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cout << " tuples -- tuples dump" << endl;
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cout << " edges -- print all object-to-object references"
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<< endl;
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cout << " refs <addr> -- find data heap references to object"
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<< endl;
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cout << " push <addr> -- push object on data stack - NOT SAFE"
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<< endl;
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cout << " gc -- trigger full GC - NOT SAFE"
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<< endl;
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cout << " compact-gc -- trigger compacting GC - NOT SAFE"
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<< endl;
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cout << " code -- code heap dump" << endl;
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cout << " abort -- call abort()" << endl;
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cout << " breakpoint -- trigger system breakpoint" << endl;
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} else {
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cout << " help -- full help, including advanced commands"
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<< endl;
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}
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cout << endl;
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}
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static void exit_fep(factor_vm* vm) {
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vm->unlock_console();
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vm->handle_ctrl_c();
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vm->fep_p = false;
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}
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void factor_vm::factorbug() {
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if (fep_disabled) {
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cout << "Low level debugger disabled" << endl;
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exit(1);
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}
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if (sampling_profiler_p)
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end_sampling_profiler();
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fep_p = true;
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cout << "Starting low level debugger..." << endl;
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// Even though we've stopped the VM, the stdin_loop thread (see os-*.cpp)
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// that pumps the console is still running concurrently. We lock a mutex so
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// the thread will take a break and give us exclusive access to stdin.
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lock_console();
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ignore_ctrl_c();
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if (!fep_help_was_shown) {
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factorbug_usage(false);
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fep_help_was_shown = true;
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}
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bool seen_command = false;
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for (;;) {
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std::string cmd;
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cout << "> " << flush;
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cin >> setw(1024) >> cmd >> setw(0);
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if (!cin.good()) {
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if (!seen_command) {
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/* If we exit with an EOF immediately, then
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dump stacks. This is useful for builder and
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other cases where Factor is run with stdin
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redirected to /dev/null */
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fep_disabled = true;
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print_datastack(cout);
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print_retainstack(cout);
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print_callstack(cout);
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}
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exit(1);
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}
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seen_command = true;
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if (cmd == "q")
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exit(1);
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if (cmd == "d") {
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cell addr = read_cell_hex();
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if (cin.peek() == ' ')
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cin.ignore();
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if (!cin.good())
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break;
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cell count = read_cell_hex();
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dump_memory(cout, addr, addr + count);
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} else if (cmd == "u") {
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cell addr = read_cell_hex();
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cell count = object_size(addr);
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dump_memory(cout, addr, addr + count);
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} else if (cmd == ".") {
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cell addr = read_cell_hex();
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print_obj(cout, addr);
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cout << endl;
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} else if (cmd == "trim")
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full_output = !full_output;
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else if (cmd == "ds")
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dump_memory(cout, ctx->datastack_seg->start, ctx->datastack);
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else if (cmd == "dr")
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dump_memory(cout, ctx->retainstack_seg->start, ctx->retainstack);
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else if (cmd == ".s")
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print_datastack(cout);
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else if (cmd == ".r")
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print_retainstack(cout);
|
|
else if (cmd == ".c")
|
|
print_callstack(cout);
|
|
else if (cmd == "e") {
|
|
for (cell i = 0; i < special_object_count; i++)
|
|
dump_cell(cout, (cell)&special_objects[i]);
|
|
} else if (cmd == "g")
|
|
dump_generations(cout);
|
|
else if (cmd == "c") {
|
|
exit_fep(this);
|
|
return;
|
|
} else if (cmd == "t") {
|
|
exit_fep(this);
|
|
general_error(ERROR_INTERRUPT, false_object, false_object);
|
|
FACTOR_ASSERT(false);
|
|
} else if (cmd == "data")
|
|
dump_objects(cout, TYPE_COUNT);
|
|
else if (cmd == "edges")
|
|
dump_edges(cout);
|
|
else if (cmd == "refs") {
|
|
cell addr = read_cell_hex();
|
|
cout << "Data heap references:" << endl;
|
|
find_data_references(cout, addr);
|
|
cout << endl;
|
|
} else if (cmd == "words")
|
|
dump_objects(cout, WORD_TYPE);
|
|
else if (cmd == "tuples")
|
|
dump_objects(cout, TUPLE_TYPE);
|
|
else if (cmd == "push") {
|
|
cell addr = read_cell_hex();
|
|
ctx->push(addr);
|
|
} else if (cmd == "code")
|
|
dump_code_heap(cout);
|
|
else if (cmd == "compact-gc")
|
|
primitive_compact_gc();
|
|
else if (cmd == "gc")
|
|
primitive_full_gc();
|
|
else if (cmd == "compact-gc")
|
|
primitive_compact_gc();
|
|
else if (cmd == "help")
|
|
factorbug_usage(true);
|
|
else if (cmd == "abort")
|
|
abort();
|
|
else if (cmd == "breakpoint")
|
|
breakpoint();
|
|
else
|
|
cout << "unknown command" << endl;
|
|
}
|
|
}
|
|
|
|
void factor_vm::primitive_die() {
|
|
cout << "The die word was called by the library. Unless you called it "
|
|
"yourself," << endl;
|
|
cout << "you have triggered a bug in Factor. Please report."
|
|
<< endl;
|
|
factorbug();
|
|
}
|
|
|
|
}
|