#ifndef INTERPRET_H__ #define INTERPRET_H__ 1 #include #ifdef HAVE_SYS_TIME_H #include #endif #include #include #include "driver.h" #include "typedefs.h" #include "backend.h" #include "bytecode.h" #include "svalue.h" /* --- Types --- */ /* --- struct control_stack: one control stack element * * Every structure describes the previous function call levels, the * current function call data is kept in interpret's global variables.. * 'prog' is usually the same as ob->prog, except when * executing inherited functions. * * TODO: The frames should have special flags to mark stuff like * TODO:: sefun closures, closures, etc. */ struct control_stack { object_t *ob; /* Current object */ object_t *prev_ob; /* Save previous object */ program_t *prog; /* Current program, NULL in the bottom entry */ svalue_t lambda; /* Current lambda, counted, or svalue-0 if none */ bytecode_p pc; /* Program counter, points to next bytecode */ svalue_t *fp; /* Frame pointer: first arg on stack */ #ifdef USE_NEW_INLINES svalue_t *context; /* Context pointer */ #endif /* USE_NEW_INLINES */ bytecode_p funstart; /* Start of the function code. * Two magic values (SIMUL_EFUN_FUNSTART and EFUN_FUNSTART) mark * entries for simul-efun and efun closures. */ int num_local_variables; /* Number of local vars + arguments */ int function_index_offset; /* Index of current program's function block within the functions of the * current objects program (needed for inheritance). */ svalue_t *current_variables; /* Same */ int extern_call; /* TRUE if the call came from outside the object (call_others to * oneself are a special case of this). Only entries with this flag * set save the .ob and .prev_ob for the flagged and all previous * unflagged entries. * If the current this_object was changed, the 'imposter' object is * stored in .pretend_to_be and this flag is or'ed with CS_PRETEND. */ # define CS_PRETEND 0x80 Bool catch_call; /* This is the 'faked' call context for the code inside a catch(). * Since the interpreter fakes a subroutine call for this, F_RETURN * must be able to tell the contexts apart. * (Right now the LPC compiler prohibits the use of 'return' inside * of a catch, but providing it on this level already doesn't hurt). */ int instruction; /* For EFUN_FUNSTART entries, this is the efun executed. */ bytecode_p *break_sp; /* Points to address to branch to at next F_BREAK, which is also * the actual bottom of the break stack. */ object_t *pretend_to_be; /* After set_this_object(), the this_object imposter. * TODO: This should be mirrored in the current_object global variable, * TODO:: to avoid accesses to wrong functions/variables. */ #ifdef EVAL_COST_TRACE int32 eval_cost; /* The eval cost at that moment. */ #endif }; /* a general error handler structure. head is assigned as payload to an * T_LVALUE svalue of type T_ERROR_HANDLER and pushed onto the value stack. * If the stack is unrolled during runtime errors the error_handler function * is called and frees buff. */ typedef struct errorhandler_s { svalue_t head; /* The T_ERROR_HANDLER structure */ char * buff; /* The allocated buffer to free. */ } errorhandler_t; /* --- Constants --- */ static const short MAX_SHIFT = (sizeof(p_int) << 3) - 1; /* The maximally useful shift (left or right) of a number in LPC. */ /* --- Variables --- */ extern program_t *current_prog; extern int tracedepth; extern int trace_level; extern bytecode_p inter_pc; extern struct control_stack *csp; extern svalue_t * inter_sp; extern int function_index_offset; extern svalue_t *current_variables; extern int32 eval_cost; extern int32 assigned_eval_cost; extern svalue_t apply_return_value; extern svalue_t last_indexing_protector; #ifdef APPLY_CACHE_STAT extern p_uint apply_cache_hit; extern p_uint apply_cache_miss; #endif extern p_uint eval_number; extern unsigned long total_evalcost; extern unsigned long last_total_evalcost; extern struct timeval last_eval_duration; extern statistic_t stat_total_evalcost; extern statistic_t stat_eval_duration; /* --- Prototypes --- */ extern void assign_eval_cost(void); extern void mark_start_evaluation (void); extern void mark_end_evaluation(void); extern Bool eval_instruction(bytecode_p first_instruction, svalue_t *initial_sp); extern void free_string_svalue(svalue_t *v); #ifdef USE_NEW_INLINES extern void push_control_stack(svalue_t *sp, bytecode_p pc, svalue_t *fp, svalue_t *context); #else extern void push_control_stack(svalue_t *sp, bytecode_p pc, svalue_t *fp); #endif /* USE_NEW_INLINES */ extern void pop_control_stack(void); extern struct longjump_s *push_error_context(svalue_t *sp, int catch_flags); extern void pop_error_context (void); extern svalue_t *pull_error_context (svalue_t *sp, svalue_t *msg); extern void transfer_error_message (svalue_t *v, rt_context_t *rt); extern Bool destructed_object_ref (svalue_t *svp); extern void free_object_svalue(svalue_t *v); extern void zero_object_svalue(svalue_t *v); extern void free_svalue(svalue_t *v); extern void assign_svalue_no_free(svalue_t *to, svalue_t *from); extern void assign_svalue(svalue_t *dest, svalue_t *v); extern void copy_svalue_no_free (svalue_t *to, svalue_t *from); extern void transfer_svalue_no_free(svalue_t *dest, svalue_t *v); extern void transfer_svalue(svalue_t *dest, svalue_t *v); extern void put_c_string (svalue_t *sp, const char *p); extern void put_c_n_string (svalue_t *sp, const char *p, size_t len); extern void push_svalue(svalue_t *v); extern void push_svalue_block(int num, svalue_t *v); extern svalue_t *pop_n_elems (int n, svalue_t *sp); extern void pop_stack(void); extern void push_apply_value(void); extern void pop_apply_value (void); extern void push_referenced_mapping(mapping_t *m); extern svalue_t *push_error_handler(void (*errorhandler)(svalue_t *), svalue_t *arg); extern void *xalloc_with_error_handler(size_t size); extern void init_interpret(void); extern const char *typename(int type); extern const char *efun_arg_typename (long type); extern void vefun_bad_arg (int arg, svalue_t *sp) NORETURN; extern void efun_gen_arg_error (int arg, int got, svalue_t *sp) NORETURN; extern void vefun_gen_arg_error (int arg, int got, svalue_t *sp) NORETURN; extern void efun_arg_error (int arg, int expected, int got, svalue_t *sp) NORETURN; extern void efun_exp_arg_error (int arg, long expected, int got, svalue_t *sp) NORETURN; extern void vefun_arg_error (int arg, int expected, int got, svalue_t *sp) NORETURN; extern void vefun_exp_arg_error (int arg, long expected, int got, svalue_t *sp) NORETURN; extern Bool privilege_violation(string_t *what, svalue_t *arg, svalue_t *sp); extern Bool privilege_violation2(string_t *what, svalue_t *arg, svalue_t *arg2, svalue_t *sp); extern Bool privilege_violation4(string_t *what, object_t *whom, string_t *how_str, int how_num, svalue_t *sp); extern Bool privilege_violation_n(string_t *what, object_t *whom, svalue_t *sp, int num_arg); extern svalue_t *sapply_int(string_t *fun, object_t *ob, int num_arg, Bool b_ign_prot, Bool b_use_default); #define sapply(f,o,n) sapply_int(f,o,n, MY_FALSE, MY_TRUE) #define sapply_ign_prot(f,o,n) sapply_int(f,o,n, MY_TRUE, MY_TRUE) extern svalue_t *apply(string_t *fun, object_t *ob, int num_arg); extern void call_function(program_t *progp, int fx); extern int get_line_number(bytecode_p p, program_t *progp, string_t **namep); extern string_t *collect_trace(strbuf_t * sbuf, vector_t ** rvec); extern string_t *dump_trace(Bool how, vector_t **rvec); extern int get_line_number_if_any(string_t **name); extern void reset_machine(Bool first); extern void secure_apply_error(svalue_t *save_sp, struct control_stack *save_csp, Bool clear_costs); extern svalue_t *secure_apply_ob(string_t *fun, object_t *ob, int num_arg, Bool external); #define secure_apply(fun, ob, num_arg) secure_apply_ob(fun, ob, num_arg, MY_FALSE) #define secure_callback(fun, ob, num_arg) secure_apply_ob(fun, ob, num_arg, MY_TRUE) extern svalue_t *apply_master_ob(string_t *fun, int num_arg, Bool external); #define apply_master(fun, num_arg) apply_master_ob(fun, num_arg, MY_FALSE) #define callback_master(fun, num_arg) apply_master_ob(fun, num_arg, MY_TRUE) extern void assert_master_ob_loaded(void); extern svalue_t *secure_call_lambda(svalue_t *closure, int num_arg, Bool external); #define secure_apply_lambda(fun, num_arg) secure_call_lambda(fun, num_arg, MY_FALSE) #define secure_callback_lambda(fun, num_arg) secure_call_lambda(fun, num_arg, MY_TRUE) extern void remove_object_from_stack(object_t *ob); extern void int_call_lambda(svalue_t *lsvp, int num_arg, Bool allowRefs, Bool external); #define call_lambda(lsvp, num_arg) int_call_lambda(lsvp, num_arg, MY_FALSE, MY_TRUE) extern inherit_t *adjust_variable_offsets(const inherit_t *inheritp, const program_t *prog, const object_t *obj); extern void free_interpreter_temporaries(void); extern void invalidate_apply_low_cache(void); extern void m_indices_filter (svalue_t *key, svalue_t *data, void *extra); extern void m_values_filter (svalue_t *key, svalue_t *data, void *extra); extern void m_unmake_filter ( svalue_t *key, svalue_t *data, void *extra); extern svalue_t *v_apply (svalue_t *sp, int num_arg); extern svalue_t *v_funcall (svalue_t *sp, int num_arg); extern svalue_t *v_call_direct_resolved (svalue_t *sp, int num_arg); extern svalue_t *v_call_resolved (svalue_t *sp, int num_arg); extern svalue_t *f_caller_stack_depth (svalue_t *sp); extern svalue_t *f_caller_stack (svalue_t *sp); extern svalue_t *f_get_eval_cost (svalue_t *sp); extern svalue_t *f_previous_object (svalue_t *sp); extern svalue_t *f_set_this_object (svalue_t *sp); extern svalue_t *f_trace(svalue_t *sp); extern svalue_t *f_traceprefix(svalue_t *sp); #ifdef OPCPROF extern Bool opcdump(string_t *fname); #endif #ifdef TRACE_CODE extern svalue_t *f_last_instructions(svalue_t *sp); extern int last_instructions(int length, Bool verbose, svalue_t **svpp); #endif #ifdef DEBUG extern int check_state(void); extern void count_inherits(program_t *progp); extern void count_extra_ref_in_object(object_t *ob); extern void count_extra_ref_in_vector(svalue_t *svp, size_t num); extern void check_a_lot_ref_counts(program_t *search_prog); #endif extern size_t interpreter_overhead(void); #ifdef GC_SUPPORT extern void clear_interpreter_refs(void); extern void count_interpreter_refs(void); #endif extern int control_stack_depth(void); #endif /* INTERPRET_H__ */