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43f3e411c4
Currently "symtabs" in gdb are stored as a single linked list of struct symtab that contains both symbol symtabs (the blockvectors) and file symtabs (the linetables). This has led to confusion, bugs, and performance issues. This patch is conceptually very simple: split struct symtab into two pieces: one part containing things common across the entire compilation unit, and one part containing things specific to each source file. Example. For the case of a program built out of these files: foo.c foo1.h foo2.h bar.c foo1.h bar.h Today we have a single list of struct symtabs: objfile -> foo.c -> foo1.h -> foo2.h -> bar.c -> foo1.h -> bar.h -> NULL where "->" means the "next" pointer in struct symtab. With this patch, that turns into: objfile -> foo.c(cu) -> bar.c(cu) -> NULL | | v v foo.c bar.c | | v v foo1.h foo1.h | | v v foo2.h bar.h | | v v NULL NULL where "foo.c(cu)" and "bar.c(cu)" are struct compunit_symtab objects, and the files foo.c, etc. are struct symtab objects. So now, for example, when we want to iterate over all blockvectors we can now just iterate over the compunit_symtab list. Plus a lot of the data that was either unused or replicated for each symtab in a compilation unit now lives in struct compunit_symtab. E.g., the objfile pointer, the producer string, etc. I thought of moving "language" out of struct symtab but there is logic to try to compute the language based on previously seen files, and I think that's best left as is for now. With my standard monster benchmark with -readnow (which I can't actually do, but based on my calculations), whereas today the list requires 77MB to store all the struct symtabs, it now only requires 37MB. A modest space savings given the gigabytes needed for all the debug info, etc. Still, it's nice. Plus, whereas today we create a copy of dirname for each source file symtab in a compilation unit, we now only create one for the compunit. So this patch is basically just a data structure reorg, I don't expect significant performance improvements from it. Notes: 1) A followup patch can do a similar split for struct partial_symtab. I have left that until after I get the changes I want in to better utilize .gdb_index (it may affect how we do partial syms). 2) Another followup patch *could* rename struct symtab. The term "symtab" is ambiguous and has been a source of confusion. In this patch I'm leaving it alone, calling it the "historical" name of "filetabs", which is what they are now: just the file-name + line-table. gdb/ChangeLog: Split struct symtab into two: struct symtab and compunit_symtab. * amd64-tdep.c (amd64_skip_xmm_prologue): Fetch producer from compunit. * block.c (blockvector_for_pc_sect): Change "struct symtab *" argument to "struct compunit_symtab *". All callers updated. (set_block_compunit_symtab): Renamed from set_block_symtab. Change "struct symtab *" argument to "struct compunit_symtab *". All callers updated. (get_block_compunit_symtab): Renamed from get_block_symtab. Change result to "struct compunit_symtab *". All callers updated. (find_iterator_compunit_symtab): Renamed from find_iterator_symtab. Change result to "struct compunit_symtab *". All callers updated. * block.h (struct global_block) <compunit_symtab>: Renamed from symtab. hange type to "struct compunit_symtab *". All uses updated. (struct block_iterator) <d.compunit_symtab>: Renamed from "d.symtab". Change type to "struct compunit_symtab *". All uses updated. * buildsym.c (struct buildsym_compunit): New struct. (subfiles, buildsym_compdir, buildsym_objfile, main_subfile): Delete. (buildsym_compunit): New static global. (finish_block_internal): Update to fetch objfile from buildsym_compunit. (make_blockvector): Delete objfile argument. (start_subfile): Rewrite to use buildsym_compunit. Don't initialize debugformat, producer. (start_buildsym_compunit): New function. (free_buildsym_compunit): Renamed from free_subfiles_list. All callers updated. (patch_subfile_names): Rewrite to use buildsym_compunit. (get_compunit_symtab): New function. (get_macro_table): Delete argument comp_dir. All callers updated. (start_symtab): Change result to "struct compunit_symtab *". All callers updated. Create the subfile of the main source file. (watch_main_source_file_lossage): Rewrite to use buildsym_compunit. (reset_symtab_globals): Update. (end_symtab_get_static_block): Update to use buildsym_compunit. (end_symtab_without_blockvector): Rewrite. (end_symtab_with_blockvector): Change result to "struct compunit_symtab *". All callers updated. Update to use buildsym_compunit. Don't set symtab->dirname, instead set it in the compunit. Explicitly make sure main symtab is first in its list. Set debugformat, producer, blockvector, block_line_section, and macrotable in the compunit. (end_symtab_from_static_block): Change result to "struct compunit_symtab *". All callers updated. (end_symtab, end_expandable_symtab): Ditto. (set_missing_symtab): Change symtab argument to "struct compunit_symtab *". All callers updated. (augment_type_symtab): Ditto. (record_debugformat): Update to use buildsym_compunit. (record_producer): Update to use buildsym_compunit. * buildsym.h (struct subfile) <dirname>: Delete. <producer, debugformat>: Delete. <buildsym_compunit>: New member. (get_compunit_symtab): Declare. * dwarf2read.c (struct type_unit_group) <compunit_symtab>: Renamed from primary_symtab. Change type to "struct compunit_symtab *". All uses updated. (dwarf2_start_symtab): Change result to "struct compunit_symtab *". All callers updated. (dwarf_decode_macros): Delete comp_dir argument. All callers updated. (struct dwarf2_per_cu_quick_data) <compunit_symtab>: Renamed from symtab. Change type to "struct compunit_symtab *". All uses updated. (dw2_instantiate_symtab): Change result to "struct compunit_symtab *". All callers updated. (dw2_find_last_source_symtab): Ditto. (dw2_lookup_symbol): Ditto. (recursively_find_pc_sect_compunit_symtab): Renamed from recursively_find_pc_sect_symtab. Change result to "struct compunit_symtab *". All callers updated. (dw2_find_pc_sect_compunit_symtab): Renamed from dw2_find_pc_sect_symtab. Change result to "struct compunit_symtab *". All callers updated. (get_compunit_symtab): Renamed from get_symtab. Change result to "struct compunit_symtab *". All callers updated. (recursively_compute_inclusions): Change type of immediate_parent argument to "struct compunit_symtab *". All callers updated. (compute_compunit_symtab_includes): Renamed from compute_symtab_includes. All callers updated. Rewrite to compute includes of compunit_symtabs and not symtabs. (process_full_comp_unit): Update to work with struct compunit_symtab. (process_full_type_unit): Ditto. (dwarf_decode_lines_1): Delete argument comp_dir. All callers updated. (dwarf_decode_lines): Remove special case handling of main subfile. (macro_start_file): Delete argument comp_dir. All callers updated. (dwarf_decode_macro_bytes): Ditto. * guile/scm-block.c (bkscm_print_block_syms_progress_smob): Update to use struct compunit_symtab. * i386-tdep.c (i386_skip_prologue): Fetch producer from compunit. * jit.c (finalize_symtab): Build compunit_symtab. * jv-lang.c (get_java_class_symtab): Change result to "struct compunit_symtab *". All callers updated. * macroscope.c (sal_macro_scope): Fetch macro table from compunit. * macrotab.c (struct macro_table) <compunit_symtab>: Renamed from comp_dir. Change type to "struct compunit_symtab *". All uses updated. (new_macro_table): Change comp_dir argument to cust, "struct compunit_symtab *". All callers updated. * maint.c (struct cmd_stats) <nr_compunit_symtabs>: Renamed from nr_primary_symtabs. All uses updated. (count_symtabs_and_blocks): Update to handle compunits. (report_command_stats): Update output, "primary symtabs" renamed to "compunits". * mdebugread.c (new_symtab): Change result to "struct compunit_symtab *". All callers updated. (parse_procedure): Change type of search_symtab argument to "struct compunit_symtab *". All callers updated. * objfiles.c (objfile_relocate1): Loop over blockvectors in a separate loop. * objfiles.h (struct objfile) <compunit_symtabs>: Renamed from symtabs. Change type to "struct compunit_symtab *". All uses updated. (ALL_OBJFILE_FILETABS): Renamed from ALL_OBJFILE_SYMTABS. All uses updated. (ALL_OBJFILE_COMPUNITS): Renamed from ALL_OBJFILE_PRIMARY_SYMTABS. All uses updated. (ALL_FILETABS): Renamed from ALL_SYMTABS. All uses updated. (ALL_COMPUNITS): Renamed from ALL_PRIMARY_SYMTABS. All uses updated. * psympriv.h (struct partial_symtab) <compunit_symtab>: Renamed from symtab. Change type to "struct compunit_symtab *". All uses updated. * psymtab.c (psymtab_to_symtab): Change result type to "struct compunit_symtab *". All callers updated. (find_pc_sect_compunit_symtab_from_partial): Renamed from find_pc_sect_symtab_from_partial. Change result type to "struct compunit_symtab *". All callers updated. (lookup_symbol_aux_psymtabs): Change result type to "struct compunit_symtab *". All callers updated. (find_last_source_symtab_from_partial): Ditto. * python/py-symtab.c (stpy_get_producer): Fetch producer from compunit. * source.c (forget_cached_source_info_for_objfile): Fetch debugformat and macro_table from compunit. * symfile-debug.c (debug_qf_find_last_source_symtab): Change result type to "struct compunit_symtab *". All callers updated. (debug_qf_lookup_symbol): Ditto. (debug_qf_find_pc_sect_compunit_symtab): Renamed from debug_qf_find_pc_sect_symtab, change result type to "struct compunit_symtab *". All callers updated. * symfile.c (allocate_symtab): Delete objfile argument. New argument cust. (allocate_compunit_symtab): New function. (add_compunit_symtab_to_objfile): New function. * symfile.h (struct quick_symbol_functions) <lookup_symbol>: Change result type to "struct compunit_symtab *". All uses updated. <find_pc_sect_compunit_symtab>: Renamed from find_pc_sect_symtab. Change result type to "struct compunit_symtab *". All uses updated. * symmisc.c (print_objfile_statistics): Compute blockvector count in separate loop. (dump_symtab_1): Update test for primary source symtab. (maintenance_info_symtabs): Update to handle compunit symtabs. (maintenance_check_symtabs): Ditto. * symtab.c (set_primary_symtab): Delete. (compunit_primary_filetab): New function. (compunit_language): New function. (iterate_over_some_symtabs): Change type of arguments "first", "after_last" to "struct compunit_symtab *". All callers updated. Update to loop over symtabs in each compunit. (error_in_psymtab_expansion): Rename symtab argument to cust, and change type to "struct compunit_symtab *". All callers updated. (find_pc_sect_compunit_symtab): Renamed from find_pc_sect_symtab. Change result type to "struct compunit_symtab *". All callers updated. (find_pc_compunit_symtab): Renamed from find_pc_symtab. Change result type to "struct compunit_symtab *". All callers updated. (find_pc_sect_line): Only loop over symtabs within selected compunit instead of all symtabs in the objfile. * symtab.h (struct symtab) <blockvector>: Moved to compunit_symtab. <compunit_symtab> New member. <block_line_section>: Moved to compunit_symtab. <locations_valid>: Ditto. <epilogue_unwind_valid>: Ditto. <macro_table>: Ditto. <dirname>: Ditto. <debugformat>: Ditto. <producer>: Ditto. <objfile>: Ditto. <call_site_htab>: Ditto. <includes>: Ditto. <user>: Ditto. <primary>: Delete (SYMTAB_COMPUNIT): New macro. (SYMTAB_BLOCKVECTOR): Update definition. (SYMTAB_OBJFILE): Update definition. (SYMTAB_DIRNAME): Update definition. (struct compunit_symtab): New type. Common members among all source symtabs within a compilation unit moved here. All uses updated. (COMPUNIT_OBJFILE): New macro. (COMPUNIT_FILETABS): New macro. (COMPUNIT_DEBUGFORMAT): New macro. (COMPUNIT_PRODUCER): New macro. (COMPUNIT_DIRNAME): New macro. (COMPUNIT_BLOCKVECTOR): New macro. (COMPUNIT_BLOCK_LINE_SECTION): New macro. (COMPUNIT_LOCATIONS_VALID): New macro. (COMPUNIT_EPILOGUE_UNWIND_VALID): New macro. (COMPUNIT_CALL_SITE_HTAB): New macro. (COMPUNIT_MACRO_TABLE): New macro. (ALL_COMPUNIT_FILETABS): New macro. (compunit_symtab_ptr): New typedef. (DEF_VEC_P (compunit_symtab_ptr)): New vector type. gdb/testsuite/ChangeLog: * gdb.base/maint.exp: Update expected output.
653 lines
24 KiB
C
653 lines
24 KiB
C
/* Definitions for reading symbol files into GDB.
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Copyright (C) 1990-2014 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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#if !defined (SYMFILE_H)
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#define SYMFILE_H
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/* This file requires that you first include "bfd.h". */
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#include "symtab.h"
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#include "probe.h"
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/* Opaque declarations. */
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struct target_section;
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struct objfile;
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struct obj_section;
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struct obstack;
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struct block;
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struct probe;
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struct value;
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struct frame_info;
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struct agent_expr;
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struct axs_value;
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/* Comparison function for symbol look ups. */
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typedef int (symbol_compare_ftype) (const char *string1,
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const char *string2);
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/* Partial symbols are stored in the psymbol_cache and pointers to
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them are kept in a dynamically grown array that is obtained from
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malloc and grown as necessary via realloc. Each objfile typically
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has two of these, one for global symbols and one for static
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symbols. Although this adds a level of indirection for storing or
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accessing the partial symbols, it allows us to throw away duplicate
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psymbols and set all pointers to the single saved instance. */
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struct psymbol_allocation_list
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{
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/* Pointer to beginning of dynamically allocated array of pointers
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to partial symbols. The array is dynamically expanded as
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necessary to accommodate more pointers. */
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struct partial_symbol **list;
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/* Pointer to next available slot in which to store a pointer to a
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partial symbol. */
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struct partial_symbol **next;
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/* Number of allocated pointer slots in current dynamic array (not
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the number of bytes of storage). The "next" pointer will always
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point somewhere between list[0] and list[size], and when at
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list[size] the array will be expanded on the next attempt to
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store a pointer. */
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int size;
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};
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/* Define an array of addresses to accommodate non-contiguous dynamic
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loading of modules. This is for use when entering commands, so we
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can keep track of the section names until we read the file and can
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map them to bfd sections. This structure is also used by solib.c
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to communicate the section addresses in shared objects to
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symbol_file_add (). */
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struct section_addr_info
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{
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/* The number of sections for which address information is
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available. */
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size_t num_sections;
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/* Sections whose names are file format dependent. */
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struct other_sections
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{
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CORE_ADDR addr;
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char *name;
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/* SECTINDEX must be valid for associated BFD or set to -1. */
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int sectindex;
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} other[1];
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};
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/* A table listing the load segments in a symfile, and which segment
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each BFD section belongs to. */
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struct symfile_segment_data
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{
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/* How many segments are present in this file. If there are
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two, the text segment is the first one and the data segment
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is the second one. */
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int num_segments;
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/* If NUM_SEGMENTS is greater than zero, the original base address
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of each segment. */
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CORE_ADDR *segment_bases;
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/* If NUM_SEGMENTS is greater than zero, the memory size of each
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segment. */
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CORE_ADDR *segment_sizes;
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/* If NUM_SEGMENTS is greater than zero, this is an array of entries
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recording which segment contains each BFD section.
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SEGMENT_INFO[I] is S+1 if the I'th BFD section belongs to segment
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S, or zero if it is not in any segment. */
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int *segment_info;
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};
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/* Callback for quick_symbol_functions->map_symbol_filenames. */
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typedef void (symbol_filename_ftype) (const char *filename,
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const char *fullname, void *data);
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/* Callback for quick_symbol_functions->expand_symtabs_matching
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to match a file name. */
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typedef int (expand_symtabs_file_matcher_ftype) (const char *filename,
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void *data, int basenames);
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/* Callback for quick_symbol_functions->expand_symtabs_matching
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to match a symbol name. */
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typedef int (expand_symtabs_symbol_matcher_ftype) (const char *name,
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void *data);
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/* The "quick" symbol functions exist so that symbol readers can
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avoiding an initial read of all the symbols. For example, symbol
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readers might choose to use the "partial symbol table" utilities,
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which is one implementation of the quick symbol functions.
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The quick symbol functions are generally opaque: the underlying
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representation is hidden from the caller.
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In general, these functions should only look at whatever special
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index the symbol reader creates -- looking through the symbol
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tables themselves is handled by generic code. If a function is
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defined as returning a "symbol table", this means that the function
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should only return a newly-created symbol table; it should not
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examine pre-existing ones.
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The exact list of functions here was determined in an ad hoc way
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based on gdb's history. */
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struct quick_symbol_functions
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{
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/* Return true if this objfile has any "partial" symbols
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available. */
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int (*has_symbols) (struct objfile *objfile);
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/* Return the symbol table for the "last" file appearing in
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OBJFILE. */
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struct symtab *(*find_last_source_symtab) (struct objfile *objfile);
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/* Forget all cached full file names for OBJFILE. */
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void (*forget_cached_source_info) (struct objfile *objfile);
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/* Expand and iterate over each "partial" symbol table in OBJFILE
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where the source file is named NAME.
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If NAME is not absolute, a match after a '/' in the symbol table's
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file name will also work, REAL_PATH is NULL then. If NAME is
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absolute then REAL_PATH is non-NULL absolute file name as resolved
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via gdb_realpath from NAME.
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If a match is found, the "partial" symbol table is expanded.
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Then, this calls iterate_over_some_symtabs (or equivalent) over
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all newly-created symbol tables, passing CALLBACK and DATA to it.
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The result of this call is returned. */
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int (*map_symtabs_matching_filename) (struct objfile *objfile,
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const char *name,
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const char *real_path,
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int (*callback) (struct symtab *,
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void *),
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void *data);
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/* Check to see if the symbol is defined in a "partial" symbol table
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of OBJFILE. BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK,
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depending on whether we want to search global symbols or static
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symbols. NAME is the name of the symbol to look for. DOMAIN
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indicates what sort of symbol to search for.
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Returns the newly-expanded compunit in which the symbol is
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defined, or NULL if no such symbol table exists. If OBJFILE
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contains !TYPE_OPAQUE symbol prefer its compunit. If it contains
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only TYPE_OPAQUE symbol(s), return at least that compunit. */
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struct compunit_symtab *(*lookup_symbol) (struct objfile *objfile,
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int block_index, const char *name,
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domain_enum domain);
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/* Print statistics about any indices loaded for OBJFILE. The
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statistics should be printed to gdb_stdout. This is used for
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"maint print statistics". */
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void (*print_stats) (struct objfile *objfile);
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/* Dump any indices loaded for OBJFILE. The dump should go to
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gdb_stdout. This is used for "maint print objfiles". */
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void (*dump) (struct objfile *objfile);
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/* This is called by objfile_relocate to relocate any indices loaded
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for OBJFILE. */
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void (*relocate) (struct objfile *objfile,
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const struct section_offsets *new_offsets,
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const struct section_offsets *delta);
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/* Find all the symbols in OBJFILE named FUNC_NAME, and ensure that
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the corresponding symbol tables are loaded. */
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void (*expand_symtabs_for_function) (struct objfile *objfile,
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const char *func_name);
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/* Read all symbol tables associated with OBJFILE. */
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void (*expand_all_symtabs) (struct objfile *objfile);
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/* Read all symbol tables associated with OBJFILE which have
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symtab_to_fullname equal to FULLNAME.
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This is for the purposes of examining code only, e.g., expand_line_sal.
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The routine may ignore debug info that is known to not be useful with
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code, e.g., DW_TAG_type_unit for dwarf debug info. */
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void (*expand_symtabs_with_fullname) (struct objfile *objfile,
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const char *fullname);
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/* Find global or static symbols in all tables that are in NAMESPACE
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and for which MATCH (symbol name, NAME) == 0, passing each to
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CALLBACK, reading in partial symbol tables as needed. Look
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through global symbols if GLOBAL and otherwise static symbols.
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Passes NAME, NAMESPACE, and DATA to CALLBACK with each symbol
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found. After each block is processed, passes NULL to CALLBACK.
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MATCH must be weaker than strcmp_iw_ordered in the sense that
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strcmp_iw_ordered(x,y) == 0 --> MATCH(x,y) == 0. ORDERED_COMPARE,
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if non-null, must be an ordering relation compatible with
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strcmp_iw_ordered in the sense that
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strcmp_iw_ordered(x,y) == 0 --> ORDERED_COMPARE(x,y) == 0
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and
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strcmp_iw_ordered(x,y) <= 0 --> ORDERED_COMPARE(x,y) <= 0
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(allowing strcmp_iw_ordered(x,y) < 0 while ORDERED_COMPARE(x, y) == 0).
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CALLBACK returns 0 to indicate that the scan should continue, or
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non-zero to indicate that the scan should be terminated. */
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void (*map_matching_symbols) (struct objfile *,
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const char *name, domain_enum namespace,
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int global,
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int (*callback) (struct block *,
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struct symbol *, void *),
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void *data,
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symbol_compare_ftype *match,
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symbol_compare_ftype *ordered_compare);
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/* Expand all symbol tables in OBJFILE matching some criteria.
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FILE_MATCHER is called for each file in OBJFILE. The file name
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and the DATA argument are passed to it. If it returns zero, this
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file is skipped. If FILE_MATCHER is NULL such file is not skipped.
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If BASENAMES is non-zero the function should consider only base name of
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DATA (passed file name is already only the lbasename part).
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Otherwise, if KIND does not match this symbol is skipped.
|
|
|
|
If even KIND matches, then SYMBOL_MATCHER is called for each symbol
|
|
defined in the file. The symbol "search" name and DATA are passed
|
|
to SYMBOL_MATCHER.
|
|
|
|
If SYMBOL_MATCHER returns zero, then this symbol is skipped.
|
|
|
|
Otherwise, this symbol's symbol table is expanded.
|
|
|
|
DATA is user data that is passed unmodified to the callback
|
|
functions. */
|
|
void (*expand_symtabs_matching)
|
|
(struct objfile *objfile,
|
|
expand_symtabs_file_matcher_ftype *file_matcher,
|
|
expand_symtabs_symbol_matcher_ftype *symbol_matcher,
|
|
enum search_domain kind,
|
|
void *data);
|
|
|
|
/* Return the comp unit from OBJFILE that contains PC and
|
|
SECTION. Return NULL if there is no such compunit. This
|
|
should return the compunit that contains a symbol whose
|
|
address exactly matches PC, or, if there is no exact match, the
|
|
compunit that contains a symbol whose address is closest to
|
|
PC. */
|
|
struct compunit_symtab *(*find_pc_sect_compunit_symtab)
|
|
(struct objfile *objfile, struct bound_minimal_symbol msymbol,
|
|
CORE_ADDR pc, struct obj_section *section, int warn_if_readin);
|
|
|
|
/* Call a callback for every file defined in OBJFILE whose symtab is
|
|
not already read in. FUN is the callback. It is passed the file's
|
|
FILENAME, the file's FULLNAME (if need_fullname is non-zero), and
|
|
the DATA passed to this function. */
|
|
void (*map_symbol_filenames) (struct objfile *objfile,
|
|
symbol_filename_ftype *fun, void *data,
|
|
int need_fullname);
|
|
};
|
|
|
|
/* Structure of functions used for probe support. If one of these functions
|
|
is provided, all must be. */
|
|
|
|
struct sym_probe_fns
|
|
{
|
|
/* If non-NULL, return an array of probe objects.
|
|
|
|
The returned value does not have to be freed and it has lifetime of the
|
|
OBJFILE. */
|
|
VEC (probe_p) *(*sym_get_probes) (struct objfile *);
|
|
};
|
|
|
|
/* Structure to keep track of symbol reading functions for various
|
|
object file types. */
|
|
|
|
struct sym_fns
|
|
{
|
|
/* Initializes anything that is global to the entire symbol table.
|
|
It is called during symbol_file_add, when we begin debugging an
|
|
entirely new program. */
|
|
|
|
void (*sym_new_init) (struct objfile *);
|
|
|
|
/* Reads any initial information from a symbol file, and initializes
|
|
the struct sym_fns SF in preparation for sym_read(). It is
|
|
called every time we read a symbol file for any reason. */
|
|
|
|
void (*sym_init) (struct objfile *);
|
|
|
|
/* sym_read (objfile, symfile_flags) Reads a symbol file into a psymtab
|
|
(or possibly a symtab). OBJFILE is the objfile struct for the
|
|
file we are reading. SYMFILE_FLAGS are the flags passed to
|
|
symbol_file_add & co. */
|
|
|
|
void (*sym_read) (struct objfile *, int);
|
|
|
|
/* Read the partial symbols for an objfile. This may be NULL, in which case
|
|
gdb has to check other ways if this objfile has any symbols. This may
|
|
only be non-NULL if the objfile actually does have debuginfo available.
|
|
*/
|
|
|
|
void (*sym_read_psymbols) (struct objfile *);
|
|
|
|
/* Called when we are finished with an objfile. Should do all
|
|
cleanup that is specific to the object file format for the
|
|
particular objfile. */
|
|
|
|
void (*sym_finish) (struct objfile *);
|
|
|
|
/* This function produces a file-dependent section_offsets
|
|
structure, allocated in the objfile's storage, and based on the
|
|
parameter. The parameter is currently a CORE_ADDR (FIXME!) for
|
|
backward compatibility with the higher levels of GDB. It should
|
|
probably be changed to a string, where NULL means the default,
|
|
and others are parsed in a file dependent way. */
|
|
|
|
void (*sym_offsets) (struct objfile *, const struct section_addr_info *);
|
|
|
|
/* This function produces a format-independent description of
|
|
the segments of ABFD. Each segment is a unit of the file
|
|
which may be relocated independently. */
|
|
|
|
struct symfile_segment_data *(*sym_segments) (bfd *abfd);
|
|
|
|
/* This function should read the linetable from the objfile when
|
|
the line table cannot be read while processing the debugging
|
|
information. */
|
|
|
|
void (*sym_read_linetable) (struct objfile *);
|
|
|
|
/* Relocate the contents of a debug section SECTP. The
|
|
contents are stored in BUF if it is non-NULL, or returned in a
|
|
malloc'd buffer otherwise. */
|
|
|
|
bfd_byte *(*sym_relocate) (struct objfile *, asection *sectp, bfd_byte *buf);
|
|
|
|
/* If non-NULL, this objfile has probe support, and all the probe
|
|
functions referred to here will be non-NULL. */
|
|
const struct sym_probe_fns *sym_probe_fns;
|
|
|
|
/* The "quick" (aka partial) symbol functions for this symbol
|
|
reader. */
|
|
const struct quick_symbol_functions *qf;
|
|
};
|
|
|
|
extern struct section_addr_info *
|
|
build_section_addr_info_from_objfile (const struct objfile *objfile);
|
|
|
|
extern void relative_addr_info_to_section_offsets
|
|
(struct section_offsets *section_offsets, int num_sections,
|
|
const struct section_addr_info *addrs);
|
|
|
|
extern void addr_info_make_relative (struct section_addr_info *addrs,
|
|
bfd *abfd);
|
|
|
|
/* The default version of sym_fns.sym_offsets for readers that don't
|
|
do anything special. */
|
|
|
|
extern void default_symfile_offsets (struct objfile *objfile,
|
|
const struct section_addr_info *);
|
|
|
|
/* The default version of sym_fns.sym_segments for readers that don't
|
|
do anything special. */
|
|
|
|
extern struct symfile_segment_data *default_symfile_segments (bfd *abfd);
|
|
|
|
/* The default version of sym_fns.sym_relocate for readers that don't
|
|
do anything special. */
|
|
|
|
extern bfd_byte *default_symfile_relocate (struct objfile *objfile,
|
|
asection *sectp, bfd_byte *buf);
|
|
|
|
extern struct symtab *allocate_symtab (struct compunit_symtab *, const char *)
|
|
ATTRIBUTE_NONNULL (1);
|
|
|
|
extern struct compunit_symtab *allocate_compunit_symtab (struct objfile *,
|
|
const char *)
|
|
ATTRIBUTE_NONNULL (1);
|
|
|
|
extern void add_compunit_symtab_to_objfile (struct compunit_symtab *cu);
|
|
|
|
extern void add_symtab_fns (enum bfd_flavour flavour, const struct sym_fns *);
|
|
|
|
/* This enum encodes bit-flags passed as ADD_FLAGS parameter to
|
|
symbol_file_add, etc. */
|
|
|
|
enum symfile_add_flags
|
|
{
|
|
/* Be chatty about what you are doing. */
|
|
SYMFILE_VERBOSE = 1 << 1,
|
|
|
|
/* This is the main symbol file (as opposed to symbol file for dynamically
|
|
loaded code). */
|
|
SYMFILE_MAINLINE = 1 << 2,
|
|
|
|
/* Do not call breakpoint_re_set when adding this symbol file. */
|
|
SYMFILE_DEFER_BP_RESET = 1 << 3,
|
|
|
|
/* Do not immediately read symbols for this file. By default,
|
|
symbols are read when the objfile is created. */
|
|
SYMFILE_NO_READ = 1 << 4
|
|
};
|
|
|
|
extern void new_symfile_objfile (struct objfile *, int);
|
|
|
|
extern struct objfile *symbol_file_add (const char *, int,
|
|
struct section_addr_info *, int);
|
|
|
|
extern struct objfile *symbol_file_add_from_bfd (bfd *, const char *, int,
|
|
struct section_addr_info *,
|
|
int, struct objfile *parent);
|
|
|
|
extern void symbol_file_add_separate (bfd *, const char *, int,
|
|
struct objfile *);
|
|
|
|
extern char *find_separate_debug_file_by_debuglink (struct objfile *);
|
|
|
|
/* Create a new section_addr_info, with room for NUM_SECTIONS. */
|
|
|
|
extern struct section_addr_info *alloc_section_addr_info (size_t
|
|
num_sections);
|
|
|
|
/* Build (allocate and populate) a section_addr_info struct from an
|
|
existing section table. */
|
|
|
|
extern struct section_addr_info
|
|
*build_section_addr_info_from_section_table (const struct target_section
|
|
*start,
|
|
const struct target_section
|
|
*end);
|
|
|
|
/* Free all memory allocated by
|
|
build_section_addr_info_from_section_table. */
|
|
|
|
extern void free_section_addr_info (struct section_addr_info *);
|
|
|
|
|
|
/* Variables */
|
|
|
|
/* If non-zero, shared library symbols will be added automatically
|
|
when the inferior is created, new libraries are loaded, or when
|
|
attaching to the inferior. This is almost always what users will
|
|
want to have happen; but for very large programs, the startup time
|
|
will be excessive, and so if this is a problem, the user can clear
|
|
this flag and then add the shared library symbols as needed. Note
|
|
that there is a potential for confusion, since if the shared
|
|
library symbols are not loaded, commands like "info fun" will *not*
|
|
report all the functions that are actually present. */
|
|
|
|
extern int auto_solib_add;
|
|
|
|
/* From symfile.c */
|
|
|
|
extern void set_initial_language (void);
|
|
|
|
extern void find_lowest_section (bfd *, asection *, void *);
|
|
|
|
extern bfd *symfile_bfd_open (const char *);
|
|
|
|
extern bfd *gdb_bfd_open_maybe_remote (const char *);
|
|
|
|
extern int get_section_index (struct objfile *, char *);
|
|
|
|
extern int print_symbol_loading_p (int from_tty, int mainline, int full);
|
|
|
|
/* Utility functions for overlay sections: */
|
|
extern enum overlay_debugging_state
|
|
{
|
|
ovly_off,
|
|
ovly_on,
|
|
ovly_auto
|
|
} overlay_debugging;
|
|
extern int overlay_cache_invalid;
|
|
|
|
/* Return the "mapped" overlay section containing the PC. */
|
|
extern struct obj_section *find_pc_mapped_section (CORE_ADDR);
|
|
|
|
/* Return any overlay section containing the PC (even in its LMA
|
|
region). */
|
|
extern struct obj_section *find_pc_overlay (CORE_ADDR);
|
|
|
|
/* Return true if the section is an overlay. */
|
|
extern int section_is_overlay (struct obj_section *);
|
|
|
|
/* Return true if the overlay section is currently "mapped". */
|
|
extern int section_is_mapped (struct obj_section *);
|
|
|
|
/* Return true if pc belongs to section's VMA. */
|
|
extern CORE_ADDR pc_in_mapped_range (CORE_ADDR, struct obj_section *);
|
|
|
|
/* Return true if pc belongs to section's LMA. */
|
|
extern CORE_ADDR pc_in_unmapped_range (CORE_ADDR, struct obj_section *);
|
|
|
|
/* Map an address from a section's LMA to its VMA. */
|
|
extern CORE_ADDR overlay_mapped_address (CORE_ADDR, struct obj_section *);
|
|
|
|
/* Map an address from a section's VMA to its LMA. */
|
|
extern CORE_ADDR overlay_unmapped_address (CORE_ADDR, struct obj_section *);
|
|
|
|
/* Convert an address in an overlay section (force into VMA range). */
|
|
extern CORE_ADDR symbol_overlayed_address (CORE_ADDR, struct obj_section *);
|
|
|
|
/* Load symbols from a file. */
|
|
extern void symbol_file_add_main (const char *args, int from_tty);
|
|
|
|
/* Clear GDB symbol tables. */
|
|
extern void symbol_file_clear (int from_tty);
|
|
|
|
/* Default overlay update function. */
|
|
extern void simple_overlay_update (struct obj_section *);
|
|
|
|
extern bfd_byte *symfile_relocate_debug_section (struct objfile *, asection *,
|
|
bfd_byte *);
|
|
|
|
extern int symfile_map_offsets_to_segments (bfd *,
|
|
const struct symfile_segment_data *,
|
|
struct section_offsets *,
|
|
int, const CORE_ADDR *);
|
|
struct symfile_segment_data *get_symfile_segment_data (bfd *abfd);
|
|
void free_symfile_segment_data (struct symfile_segment_data *data);
|
|
|
|
extern struct cleanup *increment_reading_symtab (void);
|
|
|
|
void expand_symtabs_matching (expand_symtabs_file_matcher_ftype *,
|
|
expand_symtabs_symbol_matcher_ftype *,
|
|
enum search_domain kind, void *data);
|
|
|
|
void map_symbol_filenames (symbol_filename_ftype *fun, void *data,
|
|
int need_fullname);
|
|
|
|
/* From dwarf2read.c */
|
|
|
|
/* Names for a dwarf2 debugging section. The field NORMAL is the normal
|
|
section name (usually from the DWARF standard), while the field COMPRESSED
|
|
is the name of compressed sections. If your object file format doesn't
|
|
support compressed sections, the field COMPRESSED can be NULL. Likewise,
|
|
the debugging section is not supported, the field NORMAL can be NULL too.
|
|
It doesn't make sense to have a NULL NORMAL field but a non-NULL COMPRESSED
|
|
field. */
|
|
|
|
struct dwarf2_section_names {
|
|
const char *normal;
|
|
const char *compressed;
|
|
};
|
|
|
|
/* List of names for dward2 debugging sections. Also most object file formats
|
|
use the standardized (ie ELF) names, some (eg XCOFF) have customized names
|
|
due to restrictions.
|
|
The table for the standard names is defined in dwarf2read.c. Please
|
|
update all instances of dwarf2_debug_sections if you add a field to this
|
|
structure. It is always safe to use { NULL, NULL } in this case. */
|
|
|
|
struct dwarf2_debug_sections {
|
|
struct dwarf2_section_names info;
|
|
struct dwarf2_section_names abbrev;
|
|
struct dwarf2_section_names line;
|
|
struct dwarf2_section_names loc;
|
|
struct dwarf2_section_names macinfo;
|
|
struct dwarf2_section_names macro;
|
|
struct dwarf2_section_names str;
|
|
struct dwarf2_section_names ranges;
|
|
struct dwarf2_section_names types;
|
|
struct dwarf2_section_names addr;
|
|
struct dwarf2_section_names frame;
|
|
struct dwarf2_section_names eh_frame;
|
|
struct dwarf2_section_names gdb_index;
|
|
/* This field has no meaning, but exists solely to catch changes to
|
|
this structure which are not reflected in some instance. */
|
|
int sentinel;
|
|
};
|
|
|
|
extern int dwarf2_has_info (struct objfile *,
|
|
const struct dwarf2_debug_sections *);
|
|
|
|
/* Dwarf2 sections that can be accessed by dwarf2_get_section_info. */
|
|
enum dwarf2_section_enum {
|
|
DWARF2_DEBUG_FRAME,
|
|
DWARF2_EH_FRAME
|
|
};
|
|
|
|
extern void dwarf2_get_section_info (struct objfile *,
|
|
enum dwarf2_section_enum,
|
|
asection **, const gdb_byte **,
|
|
bfd_size_type *);
|
|
|
|
extern int dwarf2_initialize_objfile (struct objfile *);
|
|
extern void dwarf2_build_psymtabs (struct objfile *);
|
|
extern void dwarf2_build_frame_info (struct objfile *);
|
|
|
|
void dwarf2_free_objfile (struct objfile *);
|
|
|
|
/* From mdebugread.c */
|
|
|
|
extern void mdebug_build_psymtabs (struct objfile *,
|
|
const struct ecoff_debug_swap *,
|
|
struct ecoff_debug_info *);
|
|
|
|
extern void elfmdebug_build_psymtabs (struct objfile *,
|
|
const struct ecoff_debug_swap *,
|
|
asection *);
|
|
|
|
/* From minidebug.c. */
|
|
|
|
extern bfd *find_separate_debug_file_in_section (struct objfile *);
|
|
|
|
#endif /* !defined(SYMFILE_H) */
|