factor/vm/debug.cpp

461 lines
9.9 KiB
C++
Executable File

#include "master.hpp"
namespace factor
{
void factor_vm::print_chars(string* str)
{
cell i;
for(i = 0; i < string_capacity(str); i++)
putchar(string_nth(str,i));
}
void factor_vm::print_word(word* word, cell nesting)
{
if(tagged<object>(word->vocabulary).type_p(STRING_TYPE))
{
print_chars(untag<string>(word->vocabulary));
print_string(":");
}
if(tagged<object>(word->name).type_p(STRING_TYPE))
print_chars(untag<string>(word->name));
else
{
print_string("#<not a string: ");
print_nested_obj(word->name,nesting);
print_string(">");
}
}
void factor_vm::print_factor_string(string* str)
{
putchar('"');
print_chars(str);
putchar('"');
}
void factor_vm::print_array(array* array, cell nesting)
{
cell length = array_capacity(array);
cell i;
bool trimmed;
if(length > 10 && !full_output)
{
trimmed = true;
length = 10;
}
else
trimmed = false;
for(i = 0; i < length; i++)
{
print_string(" ");
print_nested_obj(array_nth(array,i),nesting);
}
if(trimmed)
print_string("...");
}
void factor_vm::print_tuple(tuple *tuple, cell nesting)
{
tuple_layout *layout = untag<tuple_layout>(tuple->layout);
cell length = to_fixnum(layout->size);
print_string(" ");
print_nested_obj(layout->klass,nesting);
cell i;
bool trimmed;
if(length > 10 && !full_output)
{
trimmed = true;
length = 10;
}
else
trimmed = false;
for(i = 0; i < length; i++)
{
print_string(" ");
print_nested_obj(tuple->data()[i],nesting);
}
if(trimmed)
print_string("...");
}
void factor_vm::print_nested_obj(cell obj, fixnum nesting)
{
if(nesting <= 0 && !full_output)
{
print_string(" ... ");
return;
}
quotation *quot;
switch(tagged<object>(obj).type())
{
case FIXNUM_TYPE:
print_fixnum(untag_fixnum(obj));
break;
case WORD_TYPE:
print_word(untag<word>(obj),nesting - 1);
break;
case STRING_TYPE:
print_factor_string(untag<string>(obj));
break;
case F_TYPE:
print_string("f");
break;
case TUPLE_TYPE:
print_string("T{");
print_tuple(untag<tuple>(obj),nesting - 1);
print_string(" }");
break;
case ARRAY_TYPE:
print_string("{");
print_array(untag<array>(obj),nesting - 1);
print_string(" }");
break;
case QUOTATION_TYPE:
print_string("[");
quot = untag<quotation>(obj);
print_array(untag<array>(quot->array),nesting - 1);
print_string(" ]");
break;
default:
print_string("#<type ");
print_cell(tagged<object>(obj).type());
print_string(" @ ");
print_cell_hex(obj);
print_string(">");
break;
}
}
void factor_vm::print_obj(cell obj)
{
print_nested_obj(obj,10);
}
void factor_vm::print_objects(cell *start, cell *end)
{
for(; start <= end; start++)
{
print_obj(*start);
nl();
}
}
void factor_vm::print_datastack()
{
print_string("==== DATA STACK:\n");
print_objects((cell *)ds_bot,(cell *)ds);
}
void factor_vm::print_retainstack()
{
print_string("==== RETAIN STACK:\n");
print_objects((cell *)rs_bot,(cell *)rs);
}
struct stack_frame_printer {
factor_vm *parent;
explicit stack_frame_printer(factor_vm *parent_) : parent(parent_) {}
void operator()(stack_frame *frame)
{
parent->print_obj(parent->frame_executing(frame));
print_string("\n");
parent->print_obj(parent->frame_scan(frame));
print_string("\n");
print_string("word/quot addr: ");
print_cell_hex((cell)parent->frame_executing(frame));
print_string("\n");
print_string("word/quot xt: ");
print_cell_hex((cell)frame->xt);
print_string("\n");
print_string("return address: ");
print_cell_hex((cell)FRAME_RETURN_ADDRESS(frame,parent));
print_string("\n");
}
};
void factor_vm::print_callstack()
{
print_string("==== CALL STACK:\n");
stack_frame_printer printer(this);
iterate_callstack(ctx,printer);
}
void factor_vm::dump_cell(cell x)
{
print_cell_hex_pad(x); print_string(": ");
x = *(cell *)x;
print_cell_hex_pad(x); print_string(" tag "); print_cell(TAG(x));
nl();
}
void factor_vm::dump_memory(cell from, cell to)
{
from = UNTAG(from);
for(; from <= to; from += sizeof(cell))
dump_cell(from);
}
void factor_vm::dump_zone(const char *name, zone *z)
{
print_string(name); print_string(": ");
print_string("Start="); print_cell(z->start);
print_string(", size="); print_cell(z->size);
print_string(", here="); print_cell(z->here - z->start); nl();
}
void factor_vm::dump_generations()
{
dump_zone("Nursery",&nursery);
dump_zone("Aging",data->aging);
dump_zone("Tenured",data->tenured);
print_string("Cards: base=");
print_cell((cell)data->cards);
print_string(", size=");
print_cell((cell)(data->cards_end - data->cards));
nl();
}
void factor_vm::dump_objects(cell type)
{
primitive_full_gc();
begin_scan();
cell obj;
while(to_boolean(obj = next_object()))
{
if(type == TYPE_COUNT || tagged<object>(obj).type_p(type))
{
print_cell_hex_pad(obj);
print_string(" ");
print_nested_obj(obj,2);
nl();
}
}
end_scan();
}
struct data_references_finder {
cell look_for, obj;
factor_vm *parent;
explicit data_references_finder(cell look_for_, cell obj_, factor_vm *parent_)
: look_for(look_for_), obj(obj_), parent(parent_) { }
void operator()(cell *scan)
{
if(look_for == *scan)
{
print_cell_hex_pad(obj);
print_string(" ");
parent->print_nested_obj(obj,2);
nl();
}
}
};
void factor_vm::find_data_references(cell look_for)
{
begin_scan();
cell obj;
while(to_boolean(obj = next_object()))
{
data_references_finder finder(look_for,obj,this);
do_slots(UNTAG(obj),finder);
}
end_scan();
}
/* Dump all code blocks for debugging */
void factor_vm::dump_code_heap()
{
cell reloc_size = 0, literal_size = 0;
heap_block *scan = code->first_block();
while(scan)
{
const char *status;
if(scan->type() == FREE_BLOCK_TYPE)
status = "free";
else if(code->state->is_marked_p(scan))
{
reloc_size += object_size(((code_block *)scan)->relocation);
literal_size += object_size(((code_block *)scan)->literals);
status = "marked";
}
else
{
reloc_size += object_size(((code_block *)scan)->relocation);
literal_size += object_size(((code_block *)scan)->literals);
status = "allocated";
}
print_cell_hex((cell)scan); print_string(" ");
print_cell_hex(scan->size()); print_string(" ");
print_string(status); print_string("\n");
scan = code->next_block(scan);
}
print_cell(reloc_size); print_string(" bytes of relocation data\n");
print_cell(literal_size); print_string(" bytes of literal data\n");
}
void factor_vm::factorbug()
{
if(fep_disabled)
{
print_string("Low level debugger disabled\n");
exit(1);
}
/* open_console(); */
print_string("Starting low level debugger...\n");
print_string(" Basic commands:\n");
print_string("q -- continue executing Factor - NOT SAFE\n");
print_string("im -- save image to fep.image\n");
print_string("x -- exit Factor\n");
print_string(" Advanced commands:\n");
print_string("d <addr> <count> -- dump memory\n");
print_string("u <addr> -- dump object at tagged <addr>\n");
print_string(". <addr> -- print object at tagged <addr>\n");
print_string("t -- toggle output trimming\n");
print_string("s r -- dump data, retain stacks\n");
print_string(".s .r .c -- print data, retain, call stacks\n");
print_string("e -- dump environment\n");
print_string("g -- dump generations\n");
print_string("data -- data heap dump\n");
print_string("words -- words dump\n");
print_string("tuples -- tuples dump\n");
print_string("refs <addr> -- find data heap references to object\n");
print_string("push <addr> -- push object on data stack - NOT SAFE\n");
print_string("code -- code heap dump\n");
bool seen_command = false;
for(;;)
{
char cmd[1024];
print_string("READY\n");
fflush(stdout);
if(scanf("%1000s",cmd) <= 0)
{
if(!seen_command)
{
/* If we exit with an EOF immediately, then
dump stacks. This is useful for builder and
other cases where Factor is run with stdin
redirected to /dev/null */
fep_disabled = true;
print_datastack();
print_retainstack();
print_callstack();
}
exit(1);
}
seen_command = true;
if(strcmp(cmd,"d") == 0)
{
cell addr = read_cell_hex();
if(scanf(" ") < 0) break;
cell count = read_cell_hex();
dump_memory(addr,addr+count);
}
else if(strcmp(cmd,"u") == 0)
{
cell addr = read_cell_hex();
cell count = object_size(addr);
dump_memory(addr,addr+count);
}
else if(strcmp(cmd,".") == 0)
{
cell addr = read_cell_hex();
print_obj(addr);
print_string("\n");
}
else if(strcmp(cmd,"t") == 0)
full_output = !full_output;
else if(strcmp(cmd,"s") == 0)
dump_memory(ds_bot,ds);
else if(strcmp(cmd,"r") == 0)
dump_memory(rs_bot,rs);
else if(strcmp(cmd,".s") == 0)
print_datastack();
else if(strcmp(cmd,".r") == 0)
print_retainstack();
else if(strcmp(cmd,".c") == 0)
print_callstack();
else if(strcmp(cmd,"e") == 0)
{
int i;
for(i = 0; i < USER_ENV; i++)
dump_cell((cell)&userenv[i]);
}
else if(strcmp(cmd,"g") == 0)
dump_generations();
else if(strcmp(cmd,"q") == 0)
return;
else if(strcmp(cmd,"x") == 0)
exit(1);
else if(strcmp(cmd,"im") == 0)
save_image(STRING_LITERAL("fep.image"));
else if(strcmp(cmd,"data") == 0)
dump_objects(TYPE_COUNT);
else if(strcmp(cmd,"refs") == 0)
{
cell addr = read_cell_hex();
print_string("Data heap references:\n");
find_data_references(addr);
nl();
}
else if(strcmp(cmd,"words") == 0)
dump_objects(WORD_TYPE);
else if(strcmp(cmd,"tuples") == 0)
dump_objects(TUPLE_TYPE);
else if(strcmp(cmd,"push") == 0)
{
cell addr = read_cell_hex();
dpush(addr);
}
else if(strcmp(cmd,"code") == 0)
dump_code_heap();
else
print_string("unknown command\n");
}
}
void factor_vm::primitive_die()
{
print_string("The die word was called by the library. Unless you called it yourself,\n");
print_string("you have triggered a bug in Factor. Please report.\n");
factorbug();
}
}