X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gdb%2Fparser-defs.h;h=ed022ad1c89db94d6ea7a0a3b8d785a2e4d91d08;hb=d7561cbbf27a8ff771f85baf6696aa7645250484;hp=ded9c330f401b887ed152b2fb30fdbb6c3a6e27f;hpb=a14ed312fd86dd2c862847230931451da2e49942;p=deliverable%2Fbinutils-gdb.git diff --git a/gdb/parser-defs.h b/gdb/parser-defs.h index ded9c330f4..ed022ad1c8 100644 --- a/gdb/parser-defs.h +++ b/gdb/parser-defs.h @@ -1,5 +1,7 @@ /* Parser definitions for GDB. - Copyright (C) 1986, 1989, 1990, 1991 Free Software Foundation, Inc. + + Copyright (C) 1986-2013 Free Software Foundation, Inc. + Modified from expread.y by the Department of Computer Science at the State University of New York at Buffalo. @@ -7,7 +9,7 @@ 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 + 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, @@ -16,54 +18,76 @@ 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., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ + 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" -extern struct std_regs *std_regs; -extern unsigned num_std_regs; +struct block; + +extern int parser_debug; extern struct expression *expout; extern int expout_size; extern int expout_ptr; +#define parse_gdbarch (expout->gdbarch) +#define parse_language (expout->language_defn) + /* 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; + +/* 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 innermost context required by the stack and register variables - we've encountered so far. */ -extern struct block *innermost_block; + we've encountered so far. */ +extern const struct block *innermost_block; /* 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; +extern const struct block *block_found; /* 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; @@ -77,22 +101,75 @@ struct symtoken int is_a_field_of_this; }; +struct objc_class_str + { + struct stoken stoken; + struct type *type; + int class; + }; + +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; + struct type_stack *stack_val; + VEC (type_ptr) *typelist_val; }; -extern union type_stack_elt *type_stack; -extern int type_stack_depth, type_stack_size; -extern void write_exp_elt (union exp_element); +/* 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; +}; + +/* Helper function to initialize the expout, expout_size, expout_ptr + trio 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 initialize_expout (int, const struct language_defn *, + struct gdbarch *); + +/* Helper function that frees any unsed space in the expout array. + It is generally used when the parser has just been parsed and + created. */ + +extern void reallocate_expout (void); + +/* 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 int prefixify_expression (struct expression *expr); extern void write_exp_elt_opcode (enum exp_opcode); @@ -102,25 +179,29 @@ extern void write_exp_elt_longcst (LONGEST); extern void write_exp_elt_dblcst (DOUBLEST); +extern void write_exp_elt_decfloatcst (gdb_byte *); + extern void write_exp_elt_type (struct type *); extern void write_exp_elt_intern (struct internalvar *); extern void write_exp_string (struct stoken); +void write_exp_string_vector (int type, struct stoken_vector *vec); + extern void write_exp_bitstring (struct stoken); -extern void write_exp_elt_block (struct block *); +extern void write_exp_elt_block (const struct block *); + +extern void write_exp_elt_objfile (struct objfile *objfile); -extern void write_exp_msymbol (struct minimal_symbol *, - struct type *, struct type *); +extern void write_exp_msymbol (struct bound_minimal_symbol); extern void write_dollar_variable (struct stoken str); -extern struct symbol *parse_nested_classes_for_hpacc (char *, int, char **, - int *, char **); +extern void mark_struct_expression (void); -extern char *find_template_name_end (char *); +extern const char *find_template_name_end (const char *); extern void start_arglist (void); @@ -128,33 +209,66 @@ 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 void push_type_int (int); +extern void insert_type_address_space (char *); + extern enum type_pieces pop_type (void); extern int pop_type_int (void); +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 *); -/* During parsing of a C expression, the pointer to the next character - is in this variable. */ +extern void null_post_parser (struct expression **, int); -extern char *lexptr; +extern int parse_float (const char *p, int len, DOUBLEST *d, + const char **suffix); -/* Tokens that refer to names do so with explicit pointer and length, - so they can share the storage that lexptr is parsing. +extern int parse_c_float (struct gdbarch *gdbarch, const char *p, int len, + DOUBLEST *d, struct type **t); - 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. +/* During parsing of a C expression, the pointer to the next character + is in this variable. */ - namecopy is allocated once, guaranteed big enough, for each parsing. */ +extern const char *lexptr; -extern char *namecopy; +/* 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. */ @@ -191,14 +305,75 @@ struct op_print enum precedence precedence; /* For a binary operator: 1 iff right associate. - For a unary operator: 1 iff postfix. */ + For a unary operator: 1 iff postfix. */ int right_assoc; }; -/* The generic method for targets to specify how their registers are - named. The mapping can be derived from three sources: - REGISTER_NAME; std_regs; or a target specific alias hook. */ +/* 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 TYPE_FUNC and OBJFILE_FUNC for any TYPE and OBJFILE found being + referenced by the single operator of EXP at position POS. Operator + parameters are located at positive (POS + number) offsets in EXP. + The functions should never be called with NULL TYPE or NULL OBJFILE. + Functions should get passed an arbitrary caller supplied DATA pointer. + If any of the functions 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; -extern int target_map_name_to_register (char *, int); +/* 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); #endif /* PARSER_DEFS_H */ +