factor/vm/objects.hpp

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namespace factor {
// Special object count and identifiers must be kept in sync with:
// core/kernel/kernel.factor
// basis/bootstrap/image/image.factor
static const cell special_object_count = 85;
enum special_object {
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OBJ_WALKER_HOOK = 3, /* non-local exit hook, used by library only */
OBJ_CALLCC_1, /* used to pass the value in callcc1 */
ERROR_HANDLER_QUOT = 5, /* quotation called when VM throws an error */
OBJ_CELL_SIZE = 7, /* sizeof(cell) */
OBJ_CPU, /* CPU architecture */
OBJ_OS, /* operating system name */
OBJ_ARGS = 10, /* command line arguments */
OBJ_STDIN, /* stdin FILE* handle */
OBJ_STDOUT, /* stdout FILE* handle */
OBJ_IMAGE = 13, /* image path name */
OBJ_EXECUTABLE, /* runtime executable path name */
OBJ_EMBEDDED = 15, /* are we embedded in another app? */
OBJ_EVAL_CALLBACK, /* used when Factor is embedded in a C app */
OBJ_YIELD_CALLBACK, /* used when Factor is embedded in a C app */
OBJ_SLEEP_CALLBACK, /* used when Factor is embedded in a C app */
OBJ_STARTUP_QUOT = 20, /* startup quotation */
OBJ_GLOBAL, /* global namespace */
OBJ_SHUTDOWN_QUOT, /* shutdown quotation */
/* Quotation compilation in quotations.cpp */
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JIT_PROLOG = 23,
JIT_PRIMITIVE_WORD,
JIT_PRIMITIVE,
JIT_WORD_JUMP,
JIT_WORD_CALL,
JIT_IF_WORD,
JIT_IF,
JIT_SAFEPOINT,
JIT_EPILOG,
JIT_RETURN,
JIT_UNUSED,
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JIT_PUSH_IMMEDIATE,
JIT_DIP_WORD,
JIT_DIP,
JIT_2DIP_WORD,
JIT_2DIP,
JIT_3DIP_WORD,
JIT_3DIP,
JIT_EXECUTE,
JIT_DECLARE_WORD,
/* External entry points. These are defined in the files in
bootstrap/assembler/ */
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C_TO_FACTOR_WORD = 43,
LAZY_JIT_COMPILE_WORD,
UNWIND_NATIVE_FRAMES_WORD,
GET_FPU_STATE_WORD,
SET_FPU_STATE_WORD,
SIGNAL_HANDLER_WORD,
LEAF_SIGNAL_HANDLER_WORD,
WIN_EXCEPTION_HANDLER,
UNUSED2,
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/* Incremented on every modify-code-heap call; invalidates call( inline
caching */
REDEFINITION_COUNTER = 52,
/* Callback stub generation in callbacks.cpp */
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CALLBACK_STUB = 53,
/* Polymorphic inline cache generation in inline_cache.cpp */
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PIC_LOAD = 54,
PIC_TAG,
PIC_TUPLE,
PIC_CHECK_TAG,
PIC_CHECK_TUPLE,
PIC_HIT,
PIC_MISS_WORD,
PIC_MISS_TAIL_WORD,
/* Megamorphic cache generation in dispatch.cpp */
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MEGA_LOOKUP = 62,
MEGA_LOOKUP_WORD,
MEGA_MISS_WORD,
OBJ_UNDEFINED = 65, /* default quotation for undefined words */
OBJ_STDERR = 66, /* stderr FILE* handle */
OBJ_STAGE2 = 67, /* have we bootstrapped? */
OBJ_CURRENT_THREAD = 68,
OBJ_THREADS = 69,
OBJ_RUN_QUEUE = 70,
OBJ_SLEEP_QUEUE = 71,
OBJ_VM_COMPILER = 72, /* version string of the compiler we were built with */
OBJ_WAITING_CALLBACKS = 73,
OBJ_SIGNAL_PIPE = 74, /* file descriptor for pipe used to communicate signals
only used on unix */
OBJ_VM_COMPILE_TIME = 75, /* when the binary was built */
OBJ_VM_VERSION = 76, /* factor version */
OBJ_VM_GIT_LABEL = 77, /* git label (git describe --all --long) */
/* Canonical truth value. In Factor, 't' */
OBJ_CANONICAL_TRUE = 78,
/* Canonical bignums. These needs to be kept in the image in case
some heap objects refer to them. */
OBJ_BIGNUM_ZERO,
OBJ_BIGNUM_POS_ONE,
OBJ_BIGNUM_NEG_ONE = 81,
};
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/* save-image-and-exit discards special objects that are filled in on startup
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anyway, to reduce image size */
inline static bool save_special_p(cell i) {
/* Need to fix the order here. */
return (i >= OBJ_STARTUP_QUOT && i <= LEAF_SIGNAL_HANDLER_WORD) ||
(i >= REDEFINITION_COUNTER && i <= OBJ_UNDEFINED) ||
i == OBJ_STAGE2 ||
(i >= OBJ_CANONICAL_TRUE && i <= OBJ_BIGNUM_NEG_ONE);
}
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template <typename Iterator> void object::each_slot(Iterator& iter) {
cell* start = (cell*)this + 1;
cell* end = start + slot_count();
while (start < end) {
iter(start);
start++;
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}
}
}