X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=gdb%2Fparser-defs.h;h=a377ec3b77d176c0a30eaff1bc3ef4b43b8af7eb;hb=b2f7c7e8b7046bf3dd99e3fb7329feb962a6bc7d;hp=fd03a6e0649a8b6efa9cc96175c7871b053d4a0d;hpb=703e4251af287e5ab16b3e91b5aea293fb49be7c;p=deliverable%2Fbinutils-gdb.git diff --git a/gdb/parser-defs.h b/gdb/parser-defs.h index fd03a6e064..a377ec3b77 100644 --- a/gdb/parser-defs.h +++ b/gdb/parser-defs.h @@ -1,67 +1,102 @@ /* Parser definitions for GDB. - Copyright (C) 1986, 1989, 1990, 1991 Free Software Foundation, Inc. + + Copyright (C) 1986-2015 Free Software Foundation, Inc. + Modified from expread.y by the Department of Computer Science at the State University of New York at Buffalo. -This file is part of GDB. + This file is part of GDB. -This program is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2 of the License, or -(at your option) any later version. + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. -This program is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. -You should have received a copy of the GNU General Public License -along with this program; if not, write to the Free Software -Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ + You should have received a copy of the GNU General Public License + along with this program. If not, see . */ #if !defined (PARSER_DEFS_H) #define PARSER_DEFS_H 1 -struct std_regs { - char *name; - int regnum; -}; +#include "doublest.h" +#include "vec.h" +#include "expression.h" + +struct block; +struct language_defn; +struct internalvar; + +extern int parser_debug; + +#define parse_gdbarch(ps) ((ps)->expout->gdbarch) +#define parse_language(ps) ((ps)->expout->language_defn) + +struct parser_state +{ + /* The expression related to this parser state. */ + + struct expression *expout; + + /* The size of the expression above. */ + + size_t expout_size; -extern struct std_regs std_regs[]; -extern unsigned num_std_regs; + /* The number of elements already in the expression. This is used + to know where to put new elements. */ -extern struct expression *expout; -extern int expout_size; -extern int expout_ptr; + size_t expout_ptr; +}; /* If this is nonzero, this block is used as the lexical context for symbol names. */ -extern struct block *expression_context_block; +extern const struct block *expression_context_block; -/* The innermost context required by the stack and register variables - we've encountered so far. */ -extern struct block *innermost_block; +/* If expression_context_block is non-zero, then this is the PC within + the block that we want to evaluate expressions at. When debugging + C or C++ code, we use this to find the exact line we're at, and + then look up the macro definitions active at that point. */ +extern CORE_ADDR expression_context_pc; -/* The block in which the most recently discovered symbol was found. - FIXME: Should be declared along with lookup_symbol in symtab.h; is not - related specifically to parsing. */ -extern struct block *block_found; +/* The innermost context required by the stack and register variables + we've encountered so far. */ +extern const struct block *innermost_block; /* Number of arguments seen so far in innermost function call. */ extern int arglist_len; /* A string token, either a char-string or bit-string. Char-strings are - used, for example, for the names of symbols. */ + used, for example, for the names of symbols. */ struct stoken { - /* Pointer to first byte of char-string or first bit of bit-string */ + /* Pointer to first byte of char-string or first bit of bit-string. */ + const char *ptr; + /* Length of string in bytes for char-string or bits for bit-string. */ + int length; + }; + +struct typed_stoken + { + /* A language-specific type field. */ + int type; + /* Pointer to first byte of char-string or first bit of bit-string. */ char *ptr; - /* Length of string in bytes for char-string or bits for bit-string */ + /* Length of string in bytes for char-string or bits for bit-string. */ int length; }; +struct stoken_vector + { + int len; + struct typed_stoken *tokens; + }; + struct ttype { struct stoken stoken; @@ -75,79 +110,179 @@ struct symtoken int is_a_field_of_this; }; +struct objc_class_str + { + struct stoken stoken; + struct type *type; + int theclass; + }; + +typedef struct type *type_ptr; +DEF_VEC_P (type_ptr); + /* For parsing of complicated types. An array should be preceded in the list by the size of the array. */ enum type_pieces - {tp_end = -1, tp_pointer, tp_reference, tp_array, tp_function}; + { + tp_end = -1, + tp_pointer, + tp_reference, + tp_array, + tp_function, + tp_function_with_arguments, + tp_const, + tp_volatile, + tp_space_identifier, + tp_type_stack + }; /* The stack can contain either an enum type_pieces or an int. */ -union type_stack_elt { - enum type_pieces piece; - int int_val; +union type_stack_elt + { + enum type_pieces piece; + int int_val; + struct type_stack *stack_val; + VEC (type_ptr) *typelist_val; + }; + +/* The type stack is an instance of this structure. */ + +struct type_stack +{ + /* Elements on the stack. */ + union type_stack_elt *elements; + /* Current stack depth. */ + int depth; + /* Allocated size of stack. */ + int size; }; -extern union type_stack_elt *type_stack; -extern int type_stack_depth, type_stack_size; -extern void write_exp_elt PARAMS ((union exp_element)); +/* Helper function to initialize the expout, expout_size, expout_ptr + trio inside PS before it is used to store expression elements created + during the parsing of an expression. INITIAL_SIZE is the initial size of + the expout array. LANG is the language used to parse the expression. + And GDBARCH is the gdbarch to use during parsing. */ -extern void write_exp_elt_opcode PARAMS ((enum exp_opcode)); +extern void initialize_expout (struct parser_state *ps, + size_t initial_size, + const struct language_defn *lang, + struct gdbarch *gdbarch); -extern void write_exp_elt_sym PARAMS ((struct symbol *)); +/* Helper function that reallocates the EXPOUT inside PS in order to + eliminate any unused space. It is generally used when the expression + has just been parsed and created. */ -extern void write_exp_elt_longcst PARAMS ((LONGEST)); +extern void reallocate_expout (struct parser_state *ps); -extern void write_exp_elt_dblcst PARAMS ((double)); +/* Reverse an expression from suffix form (in which it is constructed) + to prefix form (in which we can conveniently print or execute it). + Ordinarily this always returns -1. However, if EXPOUT_LAST_STRUCT + is not -1 (i.e., we are trying to complete a field name), it will + return the index of the subexpression which is the left-hand-side + of the struct operation at EXPOUT_LAST_STRUCT. */ -extern void write_exp_elt_type PARAMS ((struct type *)); +extern int prefixify_expression (struct expression *expr); -extern void write_exp_elt_intern PARAMS ((struct internalvar *)); +extern void write_exp_elt_opcode (struct parser_state *, enum exp_opcode); -extern void write_exp_string PARAMS ((struct stoken)); +extern void write_exp_elt_sym (struct parser_state *, struct symbol *); -extern void write_exp_bitstring PARAMS ((struct stoken)); +extern void write_exp_elt_longcst (struct parser_state *, LONGEST); -extern void write_exp_elt_block PARAMS ((struct block *)); +extern void write_exp_elt_dblcst (struct parser_state *, DOUBLEST); -extern void write_exp_msymbol PARAMS ((struct minimal_symbol *, - struct type *, struct type *)); +extern void write_exp_elt_decfloatcst (struct parser_state *, gdb_byte *); -extern void -start_arglist PARAMS ((void)); +extern void write_exp_elt_type (struct parser_state *, struct type *); -extern int -end_arglist PARAMS ((void)); +extern void write_exp_elt_intern (struct parser_state *, struct internalvar *); -extern char * -copy_name PARAMS ((struct stoken)); +extern void write_exp_string (struct parser_state *, struct stoken); -extern void -push_type PARAMS ((enum type_pieces)); +void write_exp_string_vector (struct parser_state *, int type, + struct stoken_vector *vec); -extern void -push_type_int PARAMS ((int)); +extern void write_exp_bitstring (struct parser_state *, struct stoken); -extern enum type_pieces -pop_type PARAMS ((void)); +extern void write_exp_elt_block (struct parser_state *, const struct block *); -extern int -pop_type_int PARAMS ((void)); +extern void write_exp_elt_objfile (struct parser_state *, + struct objfile *objfile); -extern struct type *follow_types PARAMS ((struct type *)); +extern void write_exp_msymbol (struct parser_state *, + struct bound_minimal_symbol); -/* During parsing of a C expression, the pointer to the next character - is in this variable. */ +extern void write_dollar_variable (struct parser_state *, struct stoken str); + +extern void mark_struct_expression (struct parser_state *); + +extern const char *find_template_name_end (const char *); + +extern void start_arglist (void); + +extern int end_arglist (void); + +extern char *copy_name (struct stoken); + +extern void insert_type (enum type_pieces); + +extern void push_type (enum type_pieces); -extern char *lexptr; +extern void push_type_int (int); -/* Tokens that refer to names do so with explicit pointer and length, - so they can share the storage that lexptr is parsing. +extern void insert_type_address_space (struct parser_state *, char *); - When it is necessary to pass a name to a function that expects - a null-terminated string, the substring is copied out - into a block of storage that namecopy points to. +extern enum type_pieces pop_type (void); - namecopy is allocated once, guaranteed big enough, for each parsing. */ +extern int pop_type_int (void); -extern char *namecopy; +extern struct type_stack *get_type_stack (void); + +extern struct type_stack *append_type_stack (struct type_stack *to, + struct type_stack *from); + +extern void push_type_stack (struct type_stack *stack); + +extern void type_stack_cleanup (void *arg); + +extern void push_typelist (VEC (type_ptr) *typelist); + +extern int length_of_subexp (struct expression *, int); + +extern int dump_subexp (struct expression *, struct ui_file *, int); + +extern int dump_subexp_body_standard (struct expression *, + struct ui_file *, int); + +extern void operator_length (const struct expression *, int, int *, int *); + +extern void operator_length_standard (const struct expression *, int, int *, + int *); + +extern int operator_check_standard (struct expression *exp, int pos, + int (*objfile_func) + (struct objfile *objfile, void *data), + void *data); + +extern char *op_name_standard (enum exp_opcode); + +extern struct type *follow_types (struct type *); + +extern void null_post_parser (struct expression **, int); + +extern int parse_float (const char *p, int len, DOUBLEST *d, + const char **suffix); + +extern int parse_c_float (struct gdbarch *gdbarch, const char *p, int len, + DOUBLEST *d, struct type **t); + +/* During parsing of a C expression, the pointer to the next character + is in this variable. */ + +extern const char *lexptr; + +/* After a token has been recognized, this variable points to it. + Currently used only for error reporting. */ +extern const char *prev_lexptr; /* Current depth in parentheses within the expression. */ @@ -166,21 +301,99 @@ extern int comma_terminates; they are used as the "surrounding precedence" to force various kinds of things to be parenthesized. */ enum precedence -{ PREC_NULL, PREC_COMMA, PREC_ABOVE_COMMA, PREC_ASSIGN, PREC_LOGICAL_OR, - PREC_LOGICAL_AND, PREC_BITWISE_IOR, PREC_BITWISE_AND, PREC_BITWISE_XOR, - PREC_EQUAL, PREC_ORDER, PREC_SHIFT, PREC_ADD, PREC_MUL, PREC_REPEAT, - PREC_HYPER, PREC_PREFIX, PREC_SUFFIX }; + { + PREC_NULL, PREC_COMMA, PREC_ABOVE_COMMA, PREC_ASSIGN, PREC_LOGICAL_OR, + PREC_LOGICAL_AND, PREC_BITWISE_IOR, PREC_BITWISE_AND, PREC_BITWISE_XOR, + PREC_EQUAL, PREC_ORDER, PREC_SHIFT, PREC_ADD, PREC_MUL, PREC_REPEAT, + PREC_HYPER, PREC_PREFIX, PREC_SUFFIX, PREC_BUILTIN_FUNCTION + }; /* Table mapping opcodes into strings for printing operators and precedences of the operators. */ struct op_print -{ - char *string; - enum exp_opcode opcode; - /* Precedence of operator. These values are used only by comparisons. */ - enum precedence precedence; - int right_assoc; -}; + { + char *string; + enum exp_opcode opcode; + /* Precedence of operator. These values are used only by comparisons. */ + enum precedence precedence; + + /* For a binary operator: 1 iff right associate. + For a unary operator: 1 iff postfix. */ + int right_assoc; + }; + +/* Information needed to print, prefixify, and evaluate expressions for + a given language. */ + +struct exp_descriptor + { + /* Print subexpression. */ + void (*print_subexp) (struct expression *, int *, struct ui_file *, + enum precedence); + + /* Returns number of exp_elements needed to represent an operator and + the number of subexpressions it takes. */ + void (*operator_length) (const struct expression*, int, int*, int *); + + /* Call OBJFILE_FUNC for any objfile found being referenced by the + single operator of EXP at position POS. Operator parameters are + located at positive (POS + number) offsets in EXP. OBJFILE_FUNC + should never be called with NULL OBJFILE. OBJFILE_FUNC should + get passed an arbitrary caller supplied DATA pointer. If it + returns non-zero value then (any other) non-zero value should be + immediately returned to the caller. Otherwise zero should be + returned. */ + int (*operator_check) (struct expression *exp, int pos, + int (*objfile_func) (struct objfile *objfile, + void *data), + void *data); + + /* Name of this operator for dumping purposes. + The returned value should never be NULL, even if EXP_OPCODE is + an unknown opcode (a string containing an image of the numeric + value of the opcode can be returned, for instance). */ + char *(*op_name) (enum exp_opcode); + + /* Dump the rest of this (prefix) expression after the operator + itself has been printed. See dump_subexp_body_standard in + (expprint.c). */ + int (*dump_subexp_body) (struct expression *, struct ui_file *, int); + + /* Evaluate an expression. */ + struct value *(*evaluate_exp) (struct type *, struct expression *, + int *, enum noside); + }; + + +/* Default descriptor containing standard definitions of all + elements. */ +extern const struct exp_descriptor exp_descriptor_standard; + +/* Functions used by language-specific extended operators to (recursively) + print/dump subexpressions. */ + +extern void print_subexp (struct expression *, int *, struct ui_file *, + enum precedence); + +extern void print_subexp_standard (struct expression *, int *, + struct ui_file *, enum precedence); + +/* Function used to avoid direct calls to fprintf + in the code generated by the bison parser. */ + +extern void parser_fprintf (FILE *, const char *, ...) ATTRIBUTE_PRINTF (2, 3); + +extern int exp_uses_objfile (struct expression *exp, struct objfile *objfile); + +extern void mark_completion_tag (enum type_code, const char *ptr, + int length); + +/* Reallocate the `expout' pointer inside PS so that it can accommodate + at least LENELT expression elements. This function does nothing if + there is enough room for the elements. */ + +extern void increase_expout_size (struct parser_state *ps, size_t lenelt); + +#endif /* PARSER_DEFS_H */ -#endif /* PARSER_DEFS_H */