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246 lines
8.3 KiB
C
246 lines
8.3 KiB
C
/* Private partial symbol table definitions.
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Copyright (C) 2009-2013 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef PSYMPRIV_H
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#define PSYMPRIV_H
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#include "psymtab.h"
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struct psymbol_allocation_list;
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/* A partial_symbol records the name, domain, and address class of
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symbols whose types we have not parsed yet. For functions, it also
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contains their memory address, so we can find them from a PC value.
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Each partial_symbol sits in a partial_symtab, all of which are chained
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on a partial symtab list and which points to the corresponding
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normal symtab once the partial_symtab has been referenced. */
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/* This structure is space critical. See space comments at the top of
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symtab.h. */
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struct partial_symbol
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{
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/* The general symbol info required for all types of symbols. */
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struct general_symbol_info ginfo;
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/* Name space code. */
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ENUM_BITFIELD(domain_enum_tag) domain : 6;
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/* Address class (for info_symbols). Note that we don't allow
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synthetic "aclass" values here at present, simply because there's
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no need. */
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ENUM_BITFIELD(address_class) aclass : 6;
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};
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#define PSYMBOL_DOMAIN(psymbol) (psymbol)->domain
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#define PSYMBOL_CLASS(psymbol) (psymbol)->aclass
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/* A convenience enum to give names to some constants used when
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searching psymtabs. This is internal to psymtab and should not be
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used elsewhere. */
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enum psymtab_search_status
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{
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PST_NOT_SEARCHED,
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PST_SEARCHED_AND_FOUND,
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PST_SEARCHED_AND_NOT_FOUND
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};
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/* Each source file that has not been fully read in is represented by
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a partial_symtab. This contains the information on where in the
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executable the debugging symbols for a specific file are, and a
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list of names of global symbols which are located in this file.
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They are all chained on partial symtab lists.
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Even after the source file has been read into a symtab, the
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partial_symtab remains around. They are allocated on an obstack,
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objfile_obstack. */
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struct partial_symtab
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{
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/* Chain of all existing partial symtabs. */
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struct partial_symtab *next;
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/* Name of the source file which this partial_symtab defines,
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or if the psymtab is anonymous then a descriptive name for
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debugging purposes, or "". It must not be NULL. */
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const char *filename;
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/* Full path of the source file. NULL if not known. */
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char *fullname;
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/* Directory in which it was compiled, or NULL if we don't know. */
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const char *dirname;
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/* Set of relocation offsets to apply to each section.
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This is typically objfile->section_offsets, but in some cases
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it's different. See, e.g., elfstab_offset_sections. */
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struct section_offsets *section_offsets;
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/* Range of text addresses covered by this file; texthigh is the
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beginning of the next section. Do not use if PSYMTABS_ADDRMAP_SUPPORTED
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is set. */
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CORE_ADDR textlow;
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CORE_ADDR texthigh;
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/* Array of pointers to all of the partial_symtab's which this one
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depends on. Since this array can only be set to previous or
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the current (?) psymtab, this dependency tree is guaranteed not
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to have any loops. "depends on" means that symbols must be read
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for the dependencies before being read for this psymtab; this is
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for type references in stabs, where if foo.c includes foo.h, declarations
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in foo.h may use type numbers defined in foo.c. For other debugging
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formats there may be no need to use dependencies. */
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struct partial_symtab **dependencies;
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int number_of_dependencies;
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/* If NULL, this is an ordinary partial symbol table.
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If non-NULL, this holds a single includer of this partial symbol
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table, and this partial symbol table is a shared one.
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A shared psymtab is one that is referenced by multiple other
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psymtabs, and which conceptually has its contents directly
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included in those.
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Shared psymtabs have special semantics. When a search finds a
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symbol in a shared table, we instead return one of the non-shared
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tables that include this one.
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A shared psymtabs can be referred to by other shared ones.
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The psymtabs that refer to a shared psymtab will list the shared
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psymtab in their 'dependencies' array.
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In DWARF terms, a shared psymtab is a DW_TAG_partial_unit; but
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of course using a name based on that would be too confusing, so
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"shared" was chosen instead.
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Only a single user is needed because, when expanding a shared
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psymtab, we only need to expand its "canonical" non-shared user.
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The choice of which one should be canonical is left to the
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debuginfo reader; it can be arbitrary. */
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struct partial_symtab *user;
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/* Global symbol list. This list will be sorted after readin to
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improve access. Binary search will be the usual method of
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finding a symbol within it. globals_offset is an integer offset
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within global_psymbols[]. */
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int globals_offset;
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int n_global_syms;
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/* Static symbol list. This list will *not* be sorted after readin;
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to find a symbol in it, exhaustive search must be used. This is
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reasonable because searches through this list will eventually
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lead to either the read in of a files symbols for real (assumed
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to take a *lot* of time; check) or an error (and we don't care
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how long errors take). This is an offset and size within
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static_psymbols[]. */
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int statics_offset;
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int n_static_syms;
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/* Non-zero if the symtab corresponding to this psymtab has been
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readin. This is located here so that this structure packs better
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on 64-bit systems. */
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unsigned char readin;
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/* True iff objfile->psymtabs_addrmap is properly populated for this
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partial_symtab. For discontiguous overlapping psymtabs is the only usable
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info in PSYMTABS_ADDRMAP. */
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unsigned char psymtabs_addrmap_supported;
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/* True if the name of this partial symtab is not a source file name. */
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unsigned char anonymous;
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/* A flag that is temporarily used when searching psymtabs. */
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ENUM_BITFIELD (psymtab_search_status) searched_flag : 2;
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/* Pointer to symtab eventually allocated for this source file, 0 if
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!readin or if we haven't looked for the symtab after it was readin. */
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struct symtab *symtab;
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/* Pointer to function which will read in the symtab corresponding to
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this psymtab. */
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void (*read_symtab) (struct partial_symtab *, struct objfile *);
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/* Information that lets read_symtab() locate the part of the symbol table
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that this psymtab corresponds to. This information is private to the
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format-dependent symbol reading routines. For further detail examine
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the various symbol reading modules. */
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void *read_symtab_private;
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};
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extern void sort_pst_symbols (struct objfile *, struct partial_symtab *);
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/* Add any kind of symbol to a psymbol_allocation_list. */
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extern void add_psymbol_to_list (const char *, int,
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int, domain_enum,
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enum address_class,
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struct psymbol_allocation_list *,
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long, CORE_ADDR,
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enum language, struct objfile *);
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extern void init_psymbol_list (struct objfile *, int);
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extern struct partial_symtab *start_psymtab_common (struct objfile *,
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struct section_offsets *,
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const char *, CORE_ADDR,
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struct partial_symbol **,
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struct partial_symbol **);
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extern struct partial_symtab *allocate_psymtab (const char *,
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struct objfile *)
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ATTRIBUTE_NONNULL (1);
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extern void discard_psymtab (struct objfile *, struct partial_symtab *);
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extern struct cleanup *make_cleanup_discard_psymtabs (struct objfile *);
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/* Traverse all psymtabs in one objfile. */
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#define ALL_OBJFILE_PSYMTABS(objfile, p) \
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for ((p) = (objfile) -> psymtabs; (p) != NULL; (p) = (p) -> next)
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#endif /* PSYMPRIV_H */
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