factor/vm/profiler.c

86 lines
1.8 KiB
C
Executable File

#include "master.h"
/* Allocates memory */
F_CODE_BLOCK *compile_profiling_stub(F_WORD *word)
{
CELL literals = allot_array_1(tag_object(word));
REGISTER_ROOT(literals);
F_ARRAY *quadruple = untag_object(userenv[JIT_PROFILING]);
CELL code = array_nth(quadruple,0);
REGISTER_ROOT(code);
F_REL rel;
rel.type = to_fixnum(array_nth(quadruple,2)) | (to_fixnum(array_nth(quadruple,1)) << 8);
rel.offset = to_fixnum(array_nth(quadruple,3)) * compiled_code_format();
F_BYTE_ARRAY *relocation = allot_byte_array(sizeof(F_REL));
memcpy((void *)BREF(relocation,0),&rel,sizeof(F_REL));
UNREGISTER_ROOT(code);
UNREGISTER_ROOT(literals);
return add_compiled_block(
WORD_TYPE,
untag_object(code),
NULL, /* no labels */
tag_object(relocation),
literals);
}
/* Allocates memory */
void update_word_xt(F_WORD *word)
{
if(profiling_p)
{
if(!word->profiling)
{
REGISTER_UNTAGGED(word);
F_CODE_BLOCK *profiling = compile_profiling_stub(word);
UNREGISTER_UNTAGGED(word);
word->profiling = profiling;
}
word->xt = (XT)(word->profiling + 1);
}
else
word->xt = (XT)(word->code + 1);
}
void set_profiling(bool profiling)
{
if(profiling == profiling_p)
return;
profiling_p = profiling;
/* Push everything to tenured space so that we can heap scan
and allocate profiling blocks if necessary */
gc();
CELL words = find_all_words();
REGISTER_ROOT(words);
CELL i;
CELL length = array_capacity(untag_object(words));
for(i = 0; i < length; i++)
{
F_WORD *word = untag_word(array_nth(untag_array(words),i));
if(profiling)
word->counter = tag_fixnum(0);
update_word_xt(word);
}
UNREGISTER_ROOT(words);
/* Update XTs in code heap */
iterate_code_heap(relocate_code_block);
}
void primitive_profiling(void)
{
set_profiling(to_boolean(dpop()));
}