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Methods and their definitions can be allocated/deallocated on-the-fly. One pathological situation is when a method is deallocated then another one is allocated immediately after that. Address of those old/new method entries/definitions can be the same then, depending on underlying malloc/free implementation. So pointer comparison is insufficient. We have to check the contents. To do so we introduce def->method_serial, which is an integer unique to that specific method definition. PS: Note that method_serial being uintptr_t rather than rb_serial_t is intentional. This is because rb_serial_t can be bigger than a pointer on a 32bit system (rb_serial_t is at least 64bit). In order to preserve old packing of struct rb_call_cache, rb_serial_t is inappropriate.
267 lines
8.2 KiB
C
267 lines
8.2 KiB
C
/**********************************************************************
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insnhelper.h - helper macros to implement each instructions
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$Author$
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created at: 04/01/01 15:50:34 JST
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Copyright (C) 2004-2007 Koichi Sasada
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**********************************************************************/
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#ifndef RUBY_INSNHELPER_H
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#define RUBY_INSNHELPER_H
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RUBY_SYMBOL_EXPORT_BEGIN
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RUBY_EXTERN VALUE ruby_vm_const_missing_count;
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RUBY_EXTERN rb_serial_t ruby_vm_global_method_state;
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RUBY_EXTERN rb_serial_t ruby_vm_global_constant_state;
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RUBY_EXTERN rb_serial_t ruby_vm_class_serial;
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RUBY_SYMBOL_EXPORT_END
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#if VM_COLLECT_USAGE_DETAILS
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#define COLLECT_USAGE_INSN(insn) vm_collect_usage_insn(insn)
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#define COLLECT_USAGE_OPERAND(insn, n, op) vm_collect_usage_operand((insn), (n), ((VALUE)(op)))
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#define COLLECT_USAGE_REGISTER(reg, s) vm_collect_usage_register((reg), (s))
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#else
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#define COLLECT_USAGE_INSN(insn) /* none */
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#define COLLECT_USAGE_OPERAND(insn, n, op) /* none */
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#define COLLECT_USAGE_REGISTER(reg, s) /* none */
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#endif
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/**********************************************************/
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/* deal with stack */
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/**********************************************************/
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#define PUSH(x) (SET_SV(x), INC_SP(1))
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#define TOPN(n) (*(GET_SP()-(n)-1))
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#define POPN(n) (DEC_SP(n))
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#define POP() (DEC_SP(1))
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#define STACK_ADDR_FROM_TOP(n) (GET_SP()-(n))
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/**********************************************************/
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/* deal with registers */
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/**********************************************************/
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#define VM_REG_CFP (reg_cfp)
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#define VM_REG_PC (VM_REG_CFP->pc)
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#define VM_REG_SP (VM_REG_CFP->sp)
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#define VM_REG_EP (VM_REG_CFP->ep)
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#define RESTORE_REGS() do { \
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VM_REG_CFP = ec->cfp; \
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} while (0)
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#if VM_COLLECT_USAGE_DETAILS
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enum vm_regan_regtype {
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VM_REGAN_PC = 0,
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VM_REGAN_SP = 1,
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VM_REGAN_EP = 2,
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VM_REGAN_CFP = 3,
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VM_REGAN_SELF = 4,
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VM_REGAN_ISEQ = 5
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};
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enum vm_regan_acttype {
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VM_REGAN_ACT_GET = 0,
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VM_REGAN_ACT_SET = 1
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};
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#define COLLECT_USAGE_REGISTER_HELPER(a, b, v) \
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(COLLECT_USAGE_REGISTER((VM_REGAN_##a), (VM_REGAN_ACT_##b)), (v))
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#else
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#define COLLECT_USAGE_REGISTER_HELPER(a, b, v) (v)
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#endif
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/* PC */
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#define GET_PC() (COLLECT_USAGE_REGISTER_HELPER(PC, GET, VM_REG_PC))
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#define SET_PC(x) (VM_REG_PC = (COLLECT_USAGE_REGISTER_HELPER(PC, SET, (x))))
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#define GET_CURRENT_INSN() (*GET_PC())
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#define GET_OPERAND(n) (GET_PC()[(n)])
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#define ADD_PC(n) (SET_PC(VM_REG_PC + (n)))
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#define JUMP(dst) (SET_PC(VM_REG_PC + (dst)))
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/* frame pointer, environment pointer */
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#define GET_CFP() (COLLECT_USAGE_REGISTER_HELPER(CFP, GET, VM_REG_CFP))
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#define GET_EP() (COLLECT_USAGE_REGISTER_HELPER(EP, GET, VM_REG_EP))
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#define SET_EP(x) (VM_REG_EP = (COLLECT_USAGE_REGISTER_HELPER(EP, SET, (x))))
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#define GET_LEP() (VM_EP_LEP(GET_EP()))
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/* SP */
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#define GET_SP() (COLLECT_USAGE_REGISTER_HELPER(SP, GET, VM_REG_SP))
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#define SET_SP(x) (VM_REG_SP = (COLLECT_USAGE_REGISTER_HELPER(SP, SET, (x))))
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#define INC_SP(x) (VM_REG_SP += (COLLECT_USAGE_REGISTER_HELPER(SP, SET, (x))))
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#define DEC_SP(x) (VM_REG_SP -= (COLLECT_USAGE_REGISTER_HELPER(SP, SET, (x))))
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#define SET_SV(x) (*GET_SP() = (x))
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/* set current stack value as x */
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/* instruction sequence C struct */
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#define GET_ISEQ() (GET_CFP()->iseq)
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/**********************************************************/
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/* deal with variables */
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/**********************************************************/
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#define GET_PREV_EP(ep) ((VALUE *)((ep)[VM_ENV_DATA_INDEX_SPECVAL] & ~0x03))
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/**********************************************************/
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/* deal with values */
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/**********************************************************/
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#define GET_SELF() (COLLECT_USAGE_REGISTER_HELPER(SELF, GET, GET_CFP()->self))
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/**********************************************************/
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/* deal with control flow 2: method/iterator */
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/**********************************************************/
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/* set fastpath when cached method is *NOT* protected
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* because inline method cache does not care about receiver.
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*/
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static inline void
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CC_SET_FASTPATH(CALL_CACHE cc, vm_call_handler func, bool enabled)
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{
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if (LIKELY(enabled)) {
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cc->call = func;
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}
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}
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static inline void
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CC_SET_ME(CALL_CACHE cc, const rb_callable_method_entry_t *me)
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{
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cc->me = me;
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cc->method_serial = me ? me->def->method_serial : 0;
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}
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#define GET_BLOCK_HANDLER() (GET_LEP()[VM_ENV_DATA_INDEX_SPECVAL])
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/**********************************************************/
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/* deal with control flow 3: exception */
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/**********************************************************/
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/**********************************************************/
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/* deal with stack canary */
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/**********************************************************/
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#if VM_CHECK_MODE > 0
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#define SETUP_CANARY() \
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VALUE *canary; \
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if (leaf) { \
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canary = GET_SP(); \
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SET_SV(vm_stack_canary); \
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} \
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else {\
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SET_SV(Qfalse); /* cleanup */ \
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}
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#define CHECK_CANARY() \
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if (leaf) { \
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if (*canary == vm_stack_canary) { \
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*canary = Qfalse; /* cleanup */ \
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} \
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else { \
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vm_canary_is_found_dead(INSN_ATTR(bin), *canary); \
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} \
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}
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#else
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#define SETUP_CANARY() /* void */
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#define CHECK_CANARY() /* void */
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#endif
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/**********************************************************/
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/* others */
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/**********************************************************/
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#ifndef MJIT_HEADER
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#define CALL_SIMPLE_METHOD() do { \
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rb_snum_t x = leaf ? INSN_ATTR(width) : 0; \
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rb_snum_t y = attr_width_opt_send_without_block(0); \
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rb_snum_t z = x - y; \
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ADD_PC(z); \
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DISPATCH_ORIGINAL_INSN(opt_send_without_block); \
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} while (0)
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#endif
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#define PREV_CLASS_SERIAL() (ruby_vm_class_serial)
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#define NEXT_CLASS_SERIAL() (++ruby_vm_class_serial)
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#define GET_GLOBAL_METHOD_STATE() (ruby_vm_global_method_state)
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#define INC_GLOBAL_METHOD_STATE() (++ruby_vm_global_method_state)
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#define GET_GLOBAL_CONSTANT_STATE() (ruby_vm_global_constant_state)
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#define INC_GLOBAL_CONSTANT_STATE() (++ruby_vm_global_constant_state)
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static inline struct vm_throw_data *
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THROW_DATA_NEW(VALUE val, const rb_control_frame_t *cf, int st)
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{
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struct vm_throw_data *obj = (struct vm_throw_data *)rb_imemo_new(imemo_throw_data, val, (VALUE)cf, 0, 0);
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obj->throw_state = st;
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return obj;
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}
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static inline VALUE
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THROW_DATA_VAL(const struct vm_throw_data *obj)
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{
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VM_ASSERT(THROW_DATA_P(obj));
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return obj->throw_obj;
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}
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static inline const rb_control_frame_t *
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THROW_DATA_CATCH_FRAME(const struct vm_throw_data *obj)
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{
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VM_ASSERT(THROW_DATA_P(obj));
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return obj->catch_frame;
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}
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static inline int
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THROW_DATA_STATE(const struct vm_throw_data *obj)
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{
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VM_ASSERT(THROW_DATA_P(obj));
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return obj->throw_state;
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}
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static inline int
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THROW_DATA_CONSUMED_P(const struct vm_throw_data *obj)
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{
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VM_ASSERT(THROW_DATA_P(obj));
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return obj->flags & THROW_DATA_CONSUMED;
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}
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static inline void
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THROW_DATA_CATCH_FRAME_SET(struct vm_throw_data *obj, const rb_control_frame_t *cfp)
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{
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VM_ASSERT(THROW_DATA_P(obj));
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obj->catch_frame = cfp;
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}
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static inline void
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THROW_DATA_STATE_SET(struct vm_throw_data *obj, int st)
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{
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VM_ASSERT(THROW_DATA_P(obj));
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obj->throw_state = st;
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}
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static inline void
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THROW_DATA_CONSUMED_SET(struct vm_throw_data *obj)
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{
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if (THROW_DATA_P(obj) &&
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THROW_DATA_STATE(obj) == TAG_BREAK) {
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obj->flags |= THROW_DATA_CONSUMED;
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}
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}
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#define IS_ARGS_SPLAT(ci) ((ci)->flag & VM_CALL_ARGS_SPLAT)
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#define IS_ARGS_KEYWORD(ci) ((ci)->flag & VM_CALL_KWARG)
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#define IS_ARGS_KW_SPLAT(ci) ((ci)->flag & VM_CALL_KW_SPLAT)
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#define IS_ARGS_KW_OR_KW_SPLAT(ci) ((ci)->flag & (VM_CALL_KWARG | VM_CALL_KW_SPLAT))
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/* If this returns true, an optimized function returned by `vm_call_iseq_setup_func`
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can be used as a fastpath. */
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static bool
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vm_call_iseq_optimizable_p(const struct rb_call_info *ci, const struct rb_call_cache *cc)
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{
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return !IS_ARGS_SPLAT(ci) && !IS_ARGS_KEYWORD(ci) &&
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!(METHOD_ENTRY_VISI(cc->me) == METHOD_VISI_PROTECTED);
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}
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#endif /* RUBY_INSNHELPER_H */
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