X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gdb%2Fparser-defs.h;h=1b1d3c366bca1e712b89f6d07a5ff83d3bc01613;hb=11cf4ffb5e256d268a8f4cea0fc88a0a46bf824c;hp=6fcf7ae53058e2b5cf4c1c8592645a4bd6495fe2;hpb=4c38e0a4fcb69f8586d8db0b9cdb8dbab5980811;p=deliverable%2Fbinutils-gdb.git diff --git a/gdb/parser-defs.h b/gdb/parser-defs.h index 6fcf7ae530..1b1d3c366b 100644 --- a/gdb/parser-defs.h +++ b/gdb/parser-defs.h @@ -1,8 +1,6 @@ /* Parser definitions for GDB. - Copyright (C) 1986, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, - 1998, 1999, 2000, 2002, 2007, 2008, 2009, 2010 - Free Software Foundation, Inc. + Copyright (C) 1986-2016 Free Software Foundation, Inc. Modified from expread.y by the Department of Computer Science at the State University of New York at Buffalo. @@ -26,20 +24,38 @@ #define PARSER_DEFS_H 1 #include "doublest.h" +#include "vec.h" +#include "expression.h" struct block; +struct language_defn; +struct internalvar; -extern struct expression *expout; -extern int expout_size; -extern int expout_ptr; +extern int parser_debug; -#define parse_gdbarch (expout->gdbarch) -#define parse_language (expout->language_defn) +#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; + + /* The number of elements already in the expression. This is used + to know where to put new elements. */ + + 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; /* If expression_context_block is non-zero, then this is the PC within the block that we want to evaluate expressions at. When debugging @@ -48,25 +64,20 @@ extern struct block *expression_context_block; 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; - -/* 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; + 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 */ - char *ptr; - /* Length of string in bytes for char-string or bits for 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; }; @@ -74,9 +85,9 @@ struct typed_stoken { /* A language-specific type field. */ int type; - /* 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. */ 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; }; @@ -95,7 +106,7 @@ struct ttype struct symtoken { struct stoken stoken; - struct symbol *sym; + struct block_symbol sym; int is_a_field_of_this; }; @@ -103,9 +114,11 @@ struct objc_class_str { struct stoken stoken; struct type *type; - int class; + 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. */ @@ -115,53 +128,94 @@ enum type_pieces tp_pointer, tp_reference, tp_array, - tp_function, + tp_function, + tp_function_with_arguments, tp_const, tp_volatile, - tp_space_identifier + 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; +}; -extern void write_exp_elt_opcode (enum exp_opcode); +/* 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_sym (struct symbol *); +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_longcst (LONGEST); +/* 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_dblcst (DOUBLEST); +extern void reallocate_expout (struct parser_state *ps); -extern void write_exp_elt_decfloatcst (gdb_byte *); +/* 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 (struct type *); +extern int prefixify_expression (struct expression *expr); -extern void write_exp_elt_intern (struct internalvar *); +extern void write_exp_elt_opcode (struct parser_state *, enum exp_opcode); -extern void write_exp_string (struct stoken); +extern void write_exp_elt_sym (struct parser_state *, struct symbol *); -void write_exp_string_vector (int type, struct stoken_vector *vec); +extern void write_exp_elt_longcst (struct parser_state *, LONGEST); -extern void write_exp_bitstring (struct stoken); +extern void write_exp_elt_dblcst (struct parser_state *, DOUBLEST); -extern void write_exp_elt_block (struct block *); +extern void write_exp_elt_decfloatcst (struct parser_state *, gdb_byte *); -extern void write_exp_elt_objfile (struct objfile *objfile); +extern void write_exp_elt_type (struct parser_state *, struct type *); -extern void write_exp_msymbol (struct minimal_symbol *); +extern void write_exp_elt_intern (struct parser_state *, struct internalvar *); -extern void write_dollar_variable (struct stoken str); +extern void write_exp_string (struct parser_state *, struct stoken); -extern void mark_struct_expression (void); +void write_exp_string_vector (struct parser_state *, int type, + struct stoken_vector *vec); -extern char *find_template_name_end (char *); +extern void write_exp_bitstring (struct parser_state *, struct stoken); + +extern void write_exp_elt_block (struct parser_state *, const struct block *); + +extern void write_exp_elt_objfile (struct parser_state *, + struct objfile *objfile); + +extern void write_exp_msymbol (struct parser_state *, + struct bound_minimal_symbol); + +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); @@ -169,16 +223,29 @@ 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 push_type_address_space (char *); +extern void insert_type_address_space (struct parser_state *, 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); @@ -186,9 +253,15 @@ 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 (struct expression *, int, int *, int *); +extern void operator_length (const struct expression *, int, int *, int *); + +extern void operator_length_standard (const struct expression *, int, int *, + int *); -extern void operator_length_standard (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); @@ -196,25 +269,20 @@ 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 char *lexptr; +extern const char *lexptr; -/* After a token has been recognized, this variable points to it. +/* After a token has been recognized, this variable points to it. Currently used only for error reporting. */ -extern char *prev_lexptr; - -/* Tokens that refer to names do so with explicit pointer and length, - so they can share the storage that lexptr is parsing. - - 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. - - namecopy is allocated once, guaranteed big enough, for each parsing. */ - -extern char *namecopy; +extern const char *prev_lexptr; /* Current depth in parentheses within the expression. */ @@ -251,7 +319,7 @@ 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; }; @@ -266,9 +334,25 @@ struct exp_descriptor /* Returns number of exp_elements needed to represent an operator and the number of subexpressions it takes. */ - void (*operator_length) (struct expression*, int, int*, int *); - - /* Name of this operator for dumping purposes. */ + 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 @@ -298,6 +382,18 @@ extern void print_subexp_standard (struct expression *, int *, /* Function used to avoid direct calls to fprintf in the code generated by the bison parser. */ -extern void parser_fprintf (FILE *, const char *, ...) ATTR_FORMAT (printf, 2 ,3); +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 */ +