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