1 /* Build symbol tables in GDB's internal format.
2 Copyright (C) 1986-2018 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
19 #if !defined (BUILDSYM_H)
25 struct compunit_symtab;
28 /* This module provides definitions used for creating and adding to
29 the symbol table. These routines are called from various symbol-
30 file-reading routines.
32 They originated in dbxread.c of gdb-4.2, and were split out to
33 make xcoffread.c more maintainable by sharing code.
35 Variables declared in this file can be defined by #define-ing the
36 name EXTERN to null. It is used to declare variables that are
37 normally extern, but which get defined in a single module using
49 #define HASHSIZE 127 /* Size of things hashed via
52 /* Core address of start of text of current source file. This too
53 comes from the N_SO symbol. For Dwarf it typically comes from the
54 DW_AT_low_pc attribute of a DW_TAG_compile_unit DIE. */
56 EXTERN CORE_ADDR last_source_start_addr;
58 /* The list of sub-source-files within the current individual
59 compilation. Each file gets its own symtab with its own linetable
60 and associated info, but they all share one blockvector. */
65 /* Space for this is malloc'd. */
67 /* Space for this is malloc'd. */
68 struct linetable *line_vector;
69 int line_vector_length;
70 /* The "containing" compunit. */
71 struct buildsym_compunit *buildsym_compunit;
72 enum language language;
73 struct symtab *symtab;
76 EXTERN struct subfile *current_subfile;
78 /* Global variable which, when set, indicates that we are processing a
79 .o file compiled with gcc */
81 EXTERN unsigned char processing_gcc_compilation;
83 /* When set, we are processing a .o file compiled by sun acc. This is
84 misnamed; it refers to all stabs-in-elf implementations which use
85 N_UNDF the way Sun does, including Solaris gcc. Hopefully all
86 stabs-in-elf implementations ever invented will choose to be
89 EXTERN unsigned char processing_acc_compilation;
91 /* Count symbols as they are processed, for error messages. */
93 EXTERN unsigned int symnum;
95 /* Record the symbols defined for each context in a list. We don't
96 create a struct block for the context until we know how long to
99 #define PENDINGSIZE 100
103 struct pending *next;
105 struct symbol *symbol[PENDINGSIZE];
108 /* Here are the three lists that symbols are put on. */
110 /* static at top level, and types */
112 EXTERN struct pending *file_symbols;
114 /* global functions and variables */
116 EXTERN struct pending *global_symbols;
118 /* everything local to lexical context */
120 EXTERN struct pending *local_symbols;
122 /* "using" directives local to lexical context. */
124 EXTERN struct using_direct *local_using_directives;
126 /* global "using" directives. */
128 EXTERN struct using_direct *global_using_directives;
130 /* Stack representing unclosed lexical contexts (that will become
131 blocks, eventually). */
135 /* Outer locals at the time we entered */
137 struct pending *locals;
139 /* Pending using directives at the time we entered. */
141 struct using_direct *local_using_directives;
143 /* Pointer into blocklist as of entry */
145 struct pending_block *old_blocks;
147 /* Name of function, if any, defining context */
151 /* Expression that computes the frame base of the lexically enclosing
152 function, if any. NULL otherwise. */
154 struct dynamic_prop *static_link;
156 /* PC where this context starts */
158 CORE_ADDR start_addr;
160 /* Temp slot for exception handling. */
164 /* For error-checking matching push/pop */
170 EXTERN struct context_stack *context_stack;
172 /* Index of first unused entry in context stack. */
174 EXTERN int context_stack_depth;
176 /* Currently allocated size of context stack. */
178 EXTERN int context_stack_size;
180 /* Non-zero if the context stack is empty. */
181 #define outermost_context_p() (context_stack_depth == 0)
183 /* Nonzero if within a function (so symbols should be local, if
184 nothing says specifically). */
186 EXTERN int within_function;
188 /* The type of the record_line function. */
189 typedef void (record_line_ftype) (struct subfile *subfile, int line,
194 #define next_symbol_text(objfile) (*next_symbol_text_func)(objfile)
196 /* Function to invoke get the next symbol. Return the symbol name. */
198 EXTERN const char *(*next_symbol_text_func) (struct objfile *);
200 extern void add_symbol_to_list (struct symbol *symbol,
201 struct pending **listhead);
203 extern struct symbol *find_symbol_in_list (struct pending *list,
204 char *name, int length);
206 extern struct block *finish_block (struct symbol *symbol,
207 struct pending **listhead,
208 struct pending_block *old_blocks,
209 const struct dynamic_prop *static_link,
213 extern void record_block_range (struct block *,
214 CORE_ADDR start, CORE_ADDR end_inclusive);
216 class scoped_free_pendings
220 scoped_free_pendings () = default;
221 ~scoped_free_pendings ();
223 DISABLE_COPY_AND_ASSIGN (scoped_free_pendings);
226 extern void start_subfile (const char *name);
228 extern void patch_subfile_names (struct subfile *subfile, const char *name);
230 extern void push_subfile (void);
232 extern char *pop_subfile (void);
234 extern struct block *end_symtab_get_static_block (CORE_ADDR end_addr,
238 extern struct compunit_symtab *
239 end_symtab_from_static_block (struct block *static_block,
240 int section, int expandable);
242 extern struct compunit_symtab *end_symtab (CORE_ADDR end_addr, int section);
244 extern struct compunit_symtab *end_expandable_symtab (CORE_ADDR end_addr,
247 extern void augment_type_symtab (void);
249 /* Defined in stabsread.c. */
251 extern void scan_file_globals (struct objfile *objfile);
253 extern void buildsym_new_init (void);
255 extern void buildsym_init (void);
257 extern struct context_stack *push_context (int desc, CORE_ADDR valu);
259 extern struct context_stack *pop_context (void);
261 extern record_line_ftype record_line;
263 extern struct compunit_symtab *start_symtab (struct objfile *objfile,
265 const char *comp_dir,
266 CORE_ADDR start_addr,
267 enum language language);
269 extern void restart_symtab (struct compunit_symtab *cust,
270 const char *name, CORE_ADDR start_addr);
272 extern int hashname (const char *name);
274 extern void free_pending_blocks (void);
276 /* Record the name of the debug format in the current pending symbol
277 table. FORMAT must be a string with a lifetime at least as long as
278 the symtab's objfile. */
280 extern void record_debugformat (const char *format);
282 /* Record the name of the debuginfo producer (usually the compiler) in
283 the current pending symbol table. PRODUCER must be a string with a
284 lifetime at least as long as the symtab's objfile. */
286 extern void record_producer (const char *producer);
288 extern void merge_symbol_lists (struct pending **srclist,
289 struct pending **targetlist);
291 /* Set the name of the last source file. NAME is copied by this
294 extern void set_last_source_file (const char *name);
296 /* Fetch the name of the last source file. */
298 extern const char *get_last_source_file (void);
300 /* Return the compunit symtab object.
301 It is only valid to call this between calls to start_symtab and the
302 end_symtab* functions. */
304 extern struct compunit_symtab *buildsym_compunit_symtab (void);
306 /* Return the macro table.
307 Initialize it if this is the first use.
308 It is only valid to call this between calls to start_symtab and the
309 end_symtab* functions. */
311 extern struct macro_table *get_macro_table (void);
315 #endif /* defined (BUILDSYM_H) */