Adds an utility function to make it shorter to write the common case
of wrapping an xstrdup with a unique_xmalloc_ptr, and uses it
throughout.
Note: I tried to put this in common/common-utils.h near skip_spaces,
etc. but that is included in common/common-defs.h before
common/gdb_unique_ptr.h is included, so it would fail to compile
because gdb::unique_xmalloc_ptr isn't defined at that point yet. I
tried moving the gdb_unique_ptr.h inclusion before common-utils.h, but
that doesn't work because gdb_unique_ptr.h depends on common-utils.h
for xfree.
gdb/ChangeLog:
2019-06-04 Pedro Alves <palves@redhat.com>
* common/gdb_unique_ptr.h (make_unique_xstrdup): New.
* ada-lang.c (catch_ada_completer): Use make_unique_xstrdup.
* breakpoint.c (condition_completer): Likewise.
* cli/cli-dump.c (scan_expression): Likewise.
* common/filestuff.c (mkdir_recursive): Likewise.
* common/gdb_tilde_expand.c (gdb_tilde_expand_up)
* common/pathstuff.c (gdb_realpath, gdb_realpath_keepfile)
(gdb_abspath): Likewise.
* compile/compile-cplus-types.c
(compile_cplus_instance::decl_name): Likewise.
* completer.c (complete_explicit_location):
(signal_completer, reg_or_group_completer_1): Likewise.
* cp-support.c (cp_remove_params_if_any): Likewise.
* fbsd-tdep.c (fbsd_core_vnode_path): Likewise.
* guile/scm-safe-call.c (gdbscm_safe_eval_string): Likewise.
* infcmd.c (strip_bg_char): Likewise.
* linespec.c (copy_token_string): Likewise.
* mi/mi-main.c (output_cores): Likewise.
* psymtab.c (psymtab_search_name):
* symfile.c (test_set_ext_lang_command): Likewise.
* target.c (target_fileio_read_stralloc): Likewise.
* tui/tui-regs.c (tui_reggroup_completer): Likewise.
* value.c (complete_internalvar): Likewise.
gdb/gdbserver/ChangeLog:
2019-06-04 Pedro Alves <palves@redhat.com>
* server.c (captured_main): Use make_unique_xstrdup.
This patch partly reverts commit 8a6d42345 ("Change representation of
psymbol to flush out accessors"); specifically, it changes
partial_symbol to no longer derive from general_symbol_info.
The basic problem here is that the bcache compares objects bitwise,
and this change made it less likely that the relevant fields in the
psymbol would be fully initialized. This could be seen by running a
test under valgrind on the Fedora-i686 buildbot.
I considered a simpler patch, namely just zeroing the psymbol's
"value" field in add_psymbol_to_bcache. However, it wasn't clear to
me that this memset could not then be optimized away by the compiler.
Regression tested by the buildbot. I think this should go in 8.3 as
well.
gdb/ChangeLog
2019-05-04 Tom Tromey <tom@tromey.com>
* psymtab.c (psymbol_name_matches, match_partial_symbol)
(lookup_partial_symbol, print_partial_symbols)
(recursively_search_psymtabs, sort_pst_symbols, psymbol_hash)
(psymbol_compare): Update.
(add_psymbol_to_bcache): Clear the entire psymbol.
(maintenance_check_psymtabs): Update.
* psympriv.h (struct partial_symbol): Don't derive from
general_symbol_info.
<obj_section, unrelocated_address, address,
set_unrelocated_address>: Update.
<ginfo>: New member.
* dwarf-index-write.c (write_psymbols, debug_names::insert)
(debug_names::write_psymbols): Update.
I noticed that there are still many places referring to non-const
blocks. This constifies all the remaining ones that I found that
could be constified.
In a few spots, this search found unused variables or fields. I
removed these. I've also removed some unnecessary casts to
"struct block *".
gdb/ChangeLog
2019-03-24 Tom Tromey <tom@tromey.com>
* c-exp.y (typebase): Remove casts.
* gdbtypes.c (lookup_unsigned_typename, )
(lookup_signed_typename): Remove cast.
* eval.c (parse_to_comma_and_eval): Remove cast.
* parse.c (write_dollar_variable): Remove cast.
* block.h (struct block) <superblock>: Now const.
* symfile-debug.c (debug_qf_map_matching_symbols): Update.
* psymtab.c (psym_map_matching_symbols): Make "block" const.
(map_block): Make "block" const.
* symfile.h (struct quick_symbol_functions)
<map_matching_symbols>: Constify block argument to "callback".
* symtab.c (basic_lookup_transparent_type_quick): Make "block"
const.
(find_pc_sect_compunit_symtab): Make "b" const.
(find_symbol_at_address): Likewise.
(search_symbols): Likewise.
* dwarf2read.c (dw2_lookup_symbol): Make "block" const.
(dw2_debug_names_lookup_symbol): Likewise.
(dw2_map_matching_symbols): Update.
* p-valprint.c (pascal_val_print): Remove "block".
* ada-lang.c (ada_add_global_exceptions): Make "b" const.
(aux_add_nonlocal_symbols): Make "block" const.
(resolve_subexp): Remove cast.
* linespec.c (iterate_over_all_matching_symtabs): Make "block"
const.
(iterate_over_file_blocks): Likewise.
* f-exp.y (%union) <bval>: Remove.
* coffread.c (patch_opaque_types): Make "b" const.
* spu-tdep.c (spu_catch_start): Make "block" const.
* c-valprint.c (print_unpacked_pointer): Remove "block".
* symmisc.c (dump_symtab_1): Make "b" const.
(block_depth): Make "block" const.
* d-exp.y (%union) <bval>: Remove.
* cp-support.h (cp_lookup_rtti_type): Update.
* cp-support.c (cp_lookup_rtti_type): Make "block" const.
* psymtab.c (psym_lookup_symbol): Make "block" const.
(maintenance_check_psymtabs): Make "b" const.
* python/py-framefilter.c (extract_sym): Make "sym_block" const.
(enumerate_locals, enumerate_args): Update.
* python/py-symtab.c (stpy_global_block): Make "block" const.
(stpy_static_block): Likewise.
* inline-frame.c (block_starting_point_at): Make "new_block"
const.
* block.c (find_block_in_blockvector): Make return type const.
(blockvector_for_pc_sect): Make "b" const.
(find_block_in_blockvector): Make "b" const.
This removes the objfile_psymtabs class in favor of a method on
objfile and on psymtab_storage.
2019-01-16 Tom Tromey <tom@tromey.com>
* objfiles.h (struct objfile) <psymtabs>: New method.
(class objfile_psymtabs): Remove.
* psymtab.h (class psymtab_storage) <partial_symtab_range>: New
typedef.
<range>: New method.
(require_partial_symbols): Change return type.
* psymtab.c (require_partial_symbols)
(psym_expand_symtabs_matching): Update.
* mdebugread.c (parse_partial_symbols): Update.
* dbxread.c (dbx_end_psymtab): Update.
Previously, the psymtab obstack was just a pointer to the objfile
obstack. This patch changes psymtabs to use their own obstack,
instead. A gdb::optional is used to avoid unnecessary allocation when
the obstack is not needed.
After this patch, the psymtab code lifetime model is that, in the core
psymtab code, objects allocated on the psymtab obstack may point to
other such objects, or to objects on the per-BFD obstack -- but never
to the objfile obstack.
Note however that this invariant is only obeyed the core psymtab code,
and even there not quite fully: there is still a link from the psymtab
to the full symtab.
Symbol readers are free to work however they like; and in particular,
even after this patch, in practice all symbol readers violate this
invariant via the read_symtab_private field.
gdb/ChangeLog
2019-01-10 Tom Tromey <tom@tromey.com>
* objfiles.h (objfile::reset_psymtabs): Update.
* objfiles.c (objfile::objfile): Update.
* psymtab.h (psymtab_storage::obstack): Update.
(psymtab_storage::m_obstack): Use gdb::optional.
(class psymtab_storage): Update comment. Remove objfile
parameter.
* psymtab.c (psymtab_storage::psymtab_storage): Update.
This adds a new psymtab allocation method to psymtab_storage and
changes the free_psymtabs member to be private. While not strictly
necessary, this seems like a decent cleanup, and also makes it simpler
to move psymtabs off of obstacks entirely, should that prove
desirable.
gdb/ChangeLog
2019-01-10 Tom Tromey <tom@tromey.com>
* psymtab.h (psymtab_storage::allocate_psymtab): New method.
<free_psymtabs>: Now private.
* psymtab.c (psymtab_storage::allocate_psymtab): Implement.
(allocate_psymtab): Use new method.
This moves a couple more psymtab-related allocations to the psymtab
obstack.
gdb/ChangeLog
2019-01-10 Tom Tromey <tom@tromey.com>
* psymtab.c (add_psymbol_to_bcache): Pass psymtab obstack to
PSYMBOL_SET_LANGUAGE.
(allocate_psymtab): Allocate psymtab on the psymtab obstack.
After this patch, the psymtab address map will now be allocated on the
psymtab obstack rather than the objfile obstack. This also changes
the psymtab storage object to make the obstack private; this will be
used later.
gdb/ChangeLog
2019-01-10 Tom Tromey <tom@tromey.com>
* psymtab.h (psymtab_storage::obstack): New method.
<m_obstack>: Rename from obstack; now private.
* psymtab.c (psymtab_storage): Update.
* dwarf2read.c (create_addrmap_from_index)
(create_addrmap_from_aranges, dwarf2_build_psymtabs_hard):
Update.
This introduces a new psymtab_storage class, which holds all
psymbol-related objects that are independent of the objfile. (This
latter contraint explains why psymbol_map was not moved; though this
could still be done with some work.)
This patch does not yet change where psymtab allocation is done --
that comes later. This just wraps everything in a single object to
make further transformations simpler.
Note that a shared_ptr is used to link from the objfile to the
psymtab_storage object. The end goal here is to allow a given symbol
reader to simply attach to the psymtab_storage object to the BFD, then
reuse it in later invocations; shared_ptr makes this simple to reason
about.
gdb/ChangeLog
2019-01-10 Tom Tromey <tom@tromey.com>
* symmisc.c (print_symbol_bcache_statistics): Update.
(print_objfile_statistics): Update.
* symfile.c (reread_symbols): Update.
* psymtab.h (class psymtab_storage): New.
* psymtab.c (psymtab_storage): New constructor.
(~psymtab_storage): New destructor.
(require_partial_symbols): Update.
(ALL_OBJFILE_PSYMTABS_REQUIRED): Rewrite.
(find_pc_sect_psymtab, find_pc_sect_psymbol)
(match_partial_symbol, lookup_partial_symbol, dump_psymtab)
(psym_dump, recursively_search_psymtabs, psym_has_symbols)
(psym_find_compunit_symtab_by_address, sort_pst_symbols)
(start_psymtab_common, end_psymtab_common)
(add_psymbol_to_bcache, add_psymbol_to_list, init_psymbol_list)
(allocate_psymtab): Update.
(psymtab_storage::discard_psymtab): Rename from discard_psymtab.
Update.
(dump_psymtab_addrmap, maintenance_print_psymbols)
(maintenance_check_psymtabs): Update.
(class objfile_psymtabs): Move to objfiles.h.
* psympriv.h (discard_psymtab): Now inline.
(psymtab_discarder::psymtab_discarder): Update.
(psymtab_discarder::~psymtab_discarder): Update.
(ALL_OBJFILE_PSYMTABS): Rewrite.
* objfiles.h (struct objfile) <psymtabs, psymtabs_addrmap,
free_psymtabs, psymbol_cache, global_psymbols, static_psymbols>:
Remove fields.
<partial_symtabs>: New field.
(class objfile_psymtabs): Move from psymtab.h. Update.
* objfiles.c (objfile::objfile): Initialize partial_symtabs, not
psymbol_cache.
(objfile::~objfile): Don't destroy psymbol_cache.
* mdebugread.c (parse_partial_symbols): Update.
* dwarf2read.c (create_addrmap_from_index)
(create_addrmap_from_aranges, dw2_find_pc_sect_compunit_symtab)
(process_psymtab_comp_unit_reader, dwarf2_build_psymtabs_hard)
(add_partial_subprogram, dwarf2_ranges_read): Update.
* dwarf-index-write.c (write_address_map)
(write_one_signatured_type, recursively_write_psymbols)
(class debug_names, class debug_names, write_psymtabs_to_index):
Update.
This changes symbol_set_names to take an objfile_per_bfd_storage
argument, and updates the users. It also changes PSYMBOL_SET_NAMES to
take this argument directly; I feel this clarifies the storage
location of objects created in psymtab.c.
gdb/ChangeLog
2019-01-10 Tom Tromey <tom@tromey.com>
* symtab.h (SYMBOL_SET_NAMES): Update.
(symbol_set_names): Update.
(MSYMBOL_SET_NAMES): Update.
* symtab.c (symbol_set_names): Change argument to be an
objfile_per_bfd_storage.
* psymtab.c (add_psymbol_to_bcache): Update.
* psympriv.h (PSYMBOL_SET_NAMES): Take per_bfd argument.
Existing callers to init_psymbol_list were checking to see if psymbols
had already been initialized. It seemed better to me to do this check
directly in init_psymbol_list, simplifying the callers.
gdb/ChangeLog
2019-01-10 Tom Tromey <tom@tromey.com>
* xcoffread.c (xcoff_initial_scan): Unconditionally call
init_psymbol_list.
* psymtab.c (init_psymbol_list): Do nothing if already called.
* psympriv.h (init_psymbol_list): Add comment.
* dwarf2read.c (dwarf2_build_psymtabs): Unconditionally call
init_psymbol_list.
* dbxread.c (dbx_symfile_read): Unconditionally call
init_psymbol_list.
This changes add_psymbol_to_list to use an enum, rather than a pointer
to a vector, to decide where to put the new symbol. This reduces the
number of direct references to the static_psymbols and global_psymbols
members of the objfile, which is handy in a later patch.
gdb/ChangeLog
2019-01-10 Tom Tromey <tom@tromey.com>
* xcoffread.c (scan_xcoff_symtab): Update.
* psymtab.c (add_psymbol_to_list): Replace "list" parameter with
"where".
* mdebugread.c (parse_partial_symbols)
(handle_psymbol_enumerators): Update.
* dwarf2read.c (add_partial_symbol, load_partial_dies): Update.
* dbxread.c (read_dbx_symtab): Update.
* psympriv.h (psymbol_placement): New enum.
(add_psymbol_to_list): Update.
start_psymtab_common takes references to the global_psymbols and
static_psymbols vectors, but it also has an objfile parameter. This
is redundant, so this patch simplifies the function by removing those
reference parameters.
gdb/ChangeLog
2019-01-10 Tom Tromey <tom@tromey.com>
* xcoffread.c (xcoff_start_psymtab): Remove global_psymbols and
static_psymbols parameters.
(scan_xcoff_symtab): Update.
* psymtab.c (start_psymtab_common): Remove global_psymbols and
static_psymbols parameters.
* psympriv.h (start_psymtab_common): Update.
* mdebugread.c (parse_partial_symbols): Update.
* dwarf2read.c (create_partial_symtab): Update.
* dbxread.c (read_dbx_symtab): Update.
(start_psymtab): Remove global_psymbols and static_psymbols
parameters.
allocate_psymtab has long cleared the new psymtab that is returned.
This patch documents this behavior and then removes some redundant
initializations.
gdb/ChangeLog
2019-01-10 Tom Tromey <tom@tromey.com>
* xcoffread.c (xcoff_end_psymtab): Remove some initializations.
* psymtab.c (allocate_psymtab): Add comment.
* psympriv.h (allocate_psymtab): Add comment.
* dwarf2read.c (dwarf2_create_include_psymtab): Remove some
initializations.
* dbxread.c (dbx_end_psymtab): Remove some initializations.
This removes most uses of ALL_OBJFILES, replacing them with ranged for
loops. The remaining uses are all in macros, and will be removed in
subsequent patches.
gdb/ChangeLog
2019-01-09 Tom Tromey <tom@tromey.com>
* symtab.c (iterate_over_symtabs, matching_obj_sections)
(expand_symtab_containing_pc, lookup_static_symbol)
(basic_lookup_transparent_type, find_pc_sect_compunit_symtab)
(find_symbol_at_address, find_line_symtab, find_main_name): Use
all_objfiles.
* probe.c (find_probe_by_pc, collect_probes): Use all_objfiles.
* breakpoint.c (create_overlay_event_breakpoint)
(create_longjmp_master_breakpoint)
(create_std_terminate_master_breakpoint)
(create_exception_master_breakpoint): Use all_objfiles.
* linux-thread-db.c (try_thread_db_load_from_pdir)
(has_libpthread): Use all_objfiles.
* ada-lang.c (add_nonlocal_symbols): Use all_objfiles.
* linespec.c (iterate_over_all_matching_symtabs)
(search_minsyms_for_name): Use all_objfiles.
* maint.c (maintenance_info_sections): Use all_objfiles.
* main.c (captured_main_1): Use all_objfiles.
* spu-tdep.c (spu_objfile_from_frame): Use all_objfiles.
* guile/scm-objfile.c (gdbscm_objfiles): Use all_objfiles.
* guile/scm-pretty-print.c
(ppscm_find_pretty_printer_from_objfiles): Use all_objfiles.
* solib-spu.c (append_ocl_sos): Use all_objfiles.
* symmisc.c (maintenance_print_symbols): Use all_objfiles.
(maintenance_print_msymbols): Use all_objfiles.
* source.c (select_source_symtab): Use all_objfiles.
* jit.c (jit_find_objf_with_entry_addr): Use all_objfiles.
* symfile.c (remove_symbol_file_command)
(expand_symtabs_matching, map_symbol_filenames): Use
all_objfiles.
* ppc-linux-tdep.c (ppc_linux_spe_context_inferior_created): Use
all_objfiles.
* dwarf2-frame.c (dwarf2_frame_find_fde): Use all_objfiles.
* objc-lang.c (find_methods): Use all_objfiles.
* objfiles.c (have_partial_symbols, have_full_symbols)
(have_minimal_symbols, qsort_cmp)
(default_iterate_over_objfiles_in_search_order): Use
all_objfiles.
* hppa-tdep.c (find_unwind_entry): Use all_objfiles.
* psymtab.c (maintenance_print_psymbols): Use all_objfiles.
(maintenance_check_psymtabs): Use all_objfiles.
(ALL_PSYMTABS): Remove.
* compile/compile-object-run.c (do_module_cleanup): Use
all_objfiles.
* blockframe.c (find_pc_partial_function): Use all_objfiles.
* cp-support.c (add_symbol_overload_list_qualified): Use
all_objfiles.
* windows-tdep.c (windows_iterate_over_objfiles_in_search_order):
Use all_objfiles.
* dwarf-index-write.c (save_gdb_index_command): Use all_objfiles.
* python/py-xmethods.c (gdbpy_get_matching_xmethod_workers): Use
all_objfiles.
* python/py-objfile.c (objfpy_lookup_objfile_by_name)
(objfpy_lookup_objfile_by_build_id): Use all_objfiles.
* python/py-prettyprint.c (find_pretty_printer_from_objfiles):
Uses all_objfiles.
* solib.c (solib_read_symbols): Use all_objfiles
This removes the ALL_PSPACE_OBJFILES macro in favor of ranged for
loops.
gdb/ChangeLog
2019-01-09 Tom Tromey <tom@tromey.com>
* probe.c (parse_probes_in_pspace): Use all_objfiles.
* guile/scm-progspace.c (gdbscm_progspace_objfiles): Use
all_objfiles.
* objfiles.h (ALL_PSPACE_OBJFILES): Remove.
* symmisc.c (print_symbol_bcache_statistics)
(print_objfile_statistics, maintenance_print_objfiles)
(maintenance_info_symtabs, maintenance_check_symtabs)
(maintenance_expand_symtabs, maintenance_info_line_tables): Use
all_objfiles.
* source.c (forget_cached_source_info): Use all_objfiles.
* symfile-debug.c (set_debug_symfile): Use all_objfiles.
* elfread.c (elf_gnu_ifunc_resolve_by_cache)
(elf_gnu_ifunc_resolve_by_got): Use all_objfiles.
* objfiles.c (update_section_map): Use all_objfiles.
(shared_objfile_contains_address_p): Likewise.
* psymtab.c (maintenance_info_psymtabs): Use all_objfiles.
* python/py-progspace.c (pspy_get_objfiles): Use all_objfiles.
I noticed a few places where a Usage line in gdb did not use upper
case for metasyntactic variables. This patch fixes all the instances
I found.
Tested on x86-64 Fedora 28.
gdb/ChangeLog
2019-01-04 Tom Tromey <tom@tromey.com>
* compile/compile.c (_initialize_compile): Use upper case for
metasyntactic variables.
* symmisc.c (_initialize_symmisc): Use upper case for
metasyntactic variables.
* psymtab.c (_initialize_psymtab): Use upper case for
metasyntactic variables.
* demangle.c (demangle_command): Use upper case for metasyntactic
variables.
(_initialize_demangler): Likewise.
* ax-gdb.c (_initialize_ax_gdb): Use upper case for metasyntactic
variables.
This commit applies all changes made after running the gdb/copyright.py
script.
Note that one file was flagged by the script, due to an invalid
copyright header
(gdb/unittests/basic_string_view/element_access/char/empty.cc).
As the file was copied from GCC's libstdc++-v3 testsuite, this commit
leaves this file untouched for the time being; a patch to fix the header
was sent to gcc-patches first.
gdb/ChangeLog:
Update copyright year range in all GDB files.
This is just to make sure one of the parameters doesn't end past
the 80 characters limit. And while at it, since all parameters were
on their own line except the first two that were listed on the same
line, it felf more consistent to just split them to have each and
every parameter on their own line.
gdb/ChangeLog:
* psymtab.c (recursively_search_psymtabs): Reformat parameters
to avoid exceeding 80 characters per line limit.
Tested by rebuilding GDB on x86_64-linux.
This patch is another attempt to fix PR cli/19551. Unlike my previous
attempt, it doesn't print progress. Instead, it just changes some
messages and adds newlines to make the output a bit nicer.
It also removes the "done." text that was previously emitted. The
idea here is that it is obvious when gdb is done reading debug info,
as it starts then doing something else; and that while this message
did not provide much benefit to users, it did make it harder to make
the output clean.
After this change the output from "./gdb -iex 'set complaint 1' -nx ./gdb"
reads:
Reading symbols from ./gdb...
.debug_ranges entry has start address of zero [in module /home/tromey/gdb/build/gdb/gdb]
DW_AT_low_pc 0x0 is zero for DIE at 0x17116c1 [in module /home/tromey/gdb/build/gdb/gdb]
.debug_line address at offset 0xa22f5 is 0 [in module /home/tromey/gdb/build/gdb/gdb]
During symbol reading, unsupported tag: 'DW_TAG_unspecified_type'.
During symbol reading, const value length mismatch for 'std::ratio<1, 1000000000>::num', got 8, expected 0.
gdb/ChangeLog
2018-10-04 Tom Tromey <tom@tromey.com>
PR cli/19551:
* symfile.c (symbol_file_add_with_addrs): Update output.
* psymtab.c (require_partial_symbols): Update output.
gdb/testsuite/ChangeLog
2018-10-04 Tom Tromey <tom@tromey.com>
PR cli/19551:
* lib/mi-support.exp (mi_gdb_file_cmd): Update.
* lib/gdb.exp (gdb_file_cmd): Update.
* gdb.stabs/weird.exp (print_weird_var): Update.
* gdb.server/solib-list.exp: Update.
* gdb.multi/remove-inferiors.exp (test_remove_inferiors): Update.
* gdb.mi/mi-cli.exp: Update.
* gdb.linespec/linespec.exp: Update.
* gdb.dwarf2/dw2-stack-boundary.exp: Update.
* gdb.dwarf2/dw2-objfile-overlap.exp: Update.
* gdb.cp/cp-relocate.exp: Update.
* gdb.base/sym-file.exp: Update.
* gdb.base/relocate.exp: Update.
* gdb.base/readnever.exp: Update.
* gdb.base/print-symbol-loading.exp (test_load_core): Update.
* gdb.base/kill-detach-inferiors-cmd.exp: Update.
* gdb.base/dbx.exp (gdb_file_cmd): Update.
* gdb.base/code_elim.exp: Update.
* gdb.base/break-unload-file.exp (test_break): Update.
* gdb.base/break-interp.exp (test_attach_gdb): Update.
* gdb.base/break-idempotent.exp (force_breakpoint_re_set):
Update.
* gdb.base/attach.exp (do_attach_tests): Update.
* gdb.base/sepdebug.exp: Update.
* gdb.python/py-section-script.exp: Update.
While working on this series, I found some unfiltered prints that
didn't make sense -- many things, like complaints, are filtered, while
their context (in this case the "Reading symbols ..." messages) may
not be.
This patch changes some spots in symbol reading to use filtered
prints. I think this is preferable overall; in fact I'd go farther
and say that unfiltered printing should just be removed.
One of these spots was not strictly related (the change to
dump_psymtab), but I left it in partly because it makes psymtab.c
"unfiltered-clean", and partly because it is an example of filtered
and unfiltered printing being mixed in the same function.
gdb/ChangeLog
2018-10-04 Tom Tromey <tom@tromey.com>
* symfile.c (symbol_file_add_with_addrs, symbol_file_clear)
(separate_debug_file_exists, find_separate_debug_file)
(add_symbol_file_command, reread_symbols, allocate_symtab)
(allocate_compunit_symtab): Use filtered printing, not
unfiltered.
* psymtab.c (require_partial_symbols, dump_psymtab)
(allocate_psymtab): Use filtered printing, not unfiltered.
This patch finally makes partial symbols and partial symtabs
independent of the program space.
Specifically:
It changes add_psymbol_to_list to accept a section index, and changes
the psymbol readers to pass this. At the same time it removes the
code to add the objfile's section offset to the psymbol.
It adds an objfile argument to the psymtab textlow and texthigh
accessors and changes some code to use the raw variants instead.
It removes the "relocate" method from struct quick_symbol_functions,
as it is no longer needed any more.
It changes partial_symbol::address so that the relevant offset is now
applied at the point of use.
gdb/ChangeLog
2018-07-26 Tom Tromey <tom@tromey.com>
* dwarf-index-write.c (add_address_entry): Don't add objfile
offsets.
* dbxread.c (find_stab_function): Rename from
find_stab_function_addr. Return a bound_minimal_symbol.
(read_dbx_symtab): Use raw_text_low, raw_text_high.
Don't add objfile offsets.
(end_psymtab): Use raw_text_low, raw_text_high,
MSYMBOL_VALUE_RAW_ADDRESS.
(read_ofile_symtab): Update.
(process_one_symbol): Update.
* dwarf2read.c (create_addrmap_from_index): Don't add objfile
offsets.
(dw2_relocate): Remove.
(dw2_find_pc_sect_symtab): Bias PC by the text offset before
searching addrmap.
(dwarf2_gdb_index_functions, dwarf2_debug_names_functions):
Update.
(process_psymtab_comp_unit_reader, add_partial_symbol)
(add_partial_subprogram, dwarf2_ranges_read): Update.
(load_partial_dies): Update.
(add_address_entry): Don't add objfile offsets.
(dwarf2_build_include_psymtabs): Update.
(create_addrmap_from_aranges): Don't add objfile offsets.
(dw2_find_pc_sect_compunit_symtab): Update.
* mdebugread.c (parse_symbol): Don't add objfile offsets.
(parse_lines): Remove 'pst' parameter, replace with 'textlow'.
Update.
(parse_partial_symbols): Don't add objfile offsets. Use
raw_text_low, raw_text_high. Update.
(handle_psymbol_enumerators, psymtab_to_symtab_1): Update.
* objfiles.c (objfile_relocate1): Don't relocate psymtabs_addrmap
or call 'relocate' quick function. Clear psymbol_map.
* psympriv.h (struct partial_symbol) <address>: Add section
offset.
<set_unrelocated_address>: Rename from set_address.
<raw_text_low, raw_text_high>: New methods.
<text_low, text_high>: Add objfile parameter.
(add_psymbol_to_bcache): Add 'section' parameter. Call
set_unrelocated_address.
* psymtab.c (find_pc_sect_psymtab_closer, find_pc_sect_psymtab)
(find_pc_psymbol): Update.
(fixup_psymbol_section, relocate_psymtabs): Remove.
(dump_psymtab, psym_functions): Update.
(add_psymbol_to_bcache, add_psymbol_to_list): Add 'section'
parameter.
(maintenance_info_psymtabs, maintenance_check_psymtabs): Update.
(start_psymtab_common): Update.
* symfile-debug.c (debug_qf_relocate): Remove.
(debug_sym_quick_functions): Update.
* symfile.h (struct quick_symbol_functions) <relocate>: Remove.
* xcoffread.c (scan_xcoff_symtab): Don't add objfile offsets.
Update.
This introduces accessors for the partial symbol table textlow and
texthigh fields. This lets us later arrange to relocate these values
at their point of use.
I did this conversion by renaming the fields. I didn't rename the
fields back afterward, thinking that on the off chance that someone
has a patch touching this area, then a merge would helpfully break
their compile.
I looked at making the fields private, but this interferes with the
memset in allocate_psymtab, and I didn't want to chase this down.
This conversion can be done later if need be.
gdb/ChangeLog
2018-07-26 Tom Tromey <tom@tromey.com>
* dbxread.c (read_dbx_symtab, end_psymtab, read_ofile_symtab):
Update.
* dwarf2read.c (dwarf2_create_include_psymtab): Don't initialize
textlow and texthigh fields.
(process_psymtab_comp_unit_reader, dwarf2_build_include_psymtabs):
Update.
* mdebugread.c (parse_lines, parse_partial_symbols)
(psymtab_to_symtab_1): Update.
* psympriv.h (struct partial_symtab) <m_text_low, m_text_high>:
Rename fields. Update comment. Now private.
<text_low, text_high, set_text_low, set_text_high>: New methods.
* psymtab.c (find_pc_sect_psymtab_closer, find_pc_sect_psymtab)
(find_pc_sect_psymbol, relocate_psymtabs, dump_psymtab)
(start_psymtab_common, maintenance_info_psymtabs)
(maintenance_check_psymtabs): Update.
* xcoffread.c (xcoff_end_psymtab): Don't initialize textlow and
texthigh fields.
(scan_xcoff_symtab): Update.
This introduces a partial_symbol::address method. This method takes
an objfile argument. This is necessary so that we can later relocate
a partial symbol at its point of use. It also adds an accessor to
compute the unrelocated value; and a method to be used for setting the
field.
Note that the new method doesn't actually perform any relocation yet.
That will come in a subsequent patch. However, the comments are
written to reflect the intended, rather than the temporary, semantics.
gdb/ChangeLog
2018-07-26 Tom Tromey <tromey@redhat.com>
* psympriv.h (struct partial_symbol) <unrelocated_address,
address, set_address>: New methods.
* psymtab.c (find_pc_sect_psymtab_closer, find_pc_sect_psymbol)
(fixup_psymbol_section, relocate_psymtabs): Update.
(print_partial_symbols): Add 'objfile' parameter. Update.
(dump_psymtab, add_psymbol_to_bcache, psym_fill_psymbol_map):
Update.
This is the psymbol analog to the patch to change the representation
of minimal symbols:
https://sourceware.org/ml/gdb-patches/2013-10/msg00524.html
It has the same rationale: namely, that we're going to change the code
to apply psymbol offsets at runtime. This will be done by adding an
argument to the SYMBOL_VALUE_ADDRESS macro -- but since we can't
convert all the symbol types at once, we need a new approach.
Because gdb now is in C++, this patch changes partial_symbol to
inherit from general_symbol_info, rather than renaming the field.
This simplifies code in some places.
Also, as noted before, these macros implement a kind of "phony
polymorphism" that is not actually useful in practice; so this patch
removes the macros in favor of simply referring directly to members.
In a few cases -- obj_section in this patch and the symbol address in
the future -- methods will be used instead.
Note that this removes the blanket memset from add_psymbol_to_bcache.
This hasn't really been needed since bcache was modified to allow
holes in objects and since psymtab took advantage of that. This
deletion was required due to changing partial_symbol to derive from
general_symbol_info.
gdb/ChangeLog
2018-07-26 Tom Tromey <tom@tromey.com>
* dwarf-index-write.c (write_psymbols, debug_names::insert)
(debug_names::write_psymbols): Update.
* psympriv.h (struct partial_symbol): Derive from
general_symbol_info.
<obj_section>: New method.
(PSYMBOL_DOMAIN, PSYMBOL_CLASS): Remove.n
* psymtab.c (find_pc_sect_psymtab_closer, find_pc_sect_psymtab)
(find_pc_sect_psymbol, fixup_psymbol_section)
(match_partial_symbol, lookup_partial_symbol, relocate_psymtabs)
(print_partial_symbols, recursively_search_psymtabs)
(compare_psymbols, psymbol_hash, psymbol_compare)
(add_psymbol_to_bcache, maintenance_check_psymtabs)
(psymbol_name_matches, psym_fill_psymbol_map): Update.
Since XOBNEW/XOBNEWVEC/OBSTACK_ZALLOC are now poisoned to prevent using
them with non-trivially-constructible objects, it is worth using them
over plain obstack_alloc. This patch changes the locations I could find
where we can do that change easily.
gdb/ChangeLog:
* ada-lang.c (cache_symbol): Use XOBNEW and/or XOBNEWVEC and/or
OBSTACK_ZALLOC.
* dwarf2-frame.c (dwarf2_build_frame_info): Likewise.
* hppa-tdep.c (hppa_init_objfile_priv_data): Likewise.
* mdebugread.c (mdebug_build_psymtabs): Likewise.
(add_pending): Likewise.
(parse_symbol): Likewise.
(parse_partial_symbols): Likewise.
(psymtab_to_symtab_1): Likewise.
(new_psymtab): Likewise.
(elfmdebug_build_psymtabs): Likewise.
* minsyms.c (terminate_minimal_symbol_table): Likewise.
* objfiles.c (get_objfile_bfd_data): Likewise.
(objfile_register_static_link): Likewise.
* psymtab.c (allocate_psymtab): Likewise.
* stabsread.c (read_member_functions): Likewise.
* xcoffread.c (xcoff_end_psymtab): Likewise.
This changes openp, source_full_path_of, and find_and_open_source to
take a unique_xmalloc_ptr, rather than a char*, as an outgoing
argument type. This simplifies the API, ownership-wise, and allows
for the removal of some cleanups.
gdb/ChangeLog
2018-02-14 Tom Tromey <tom@tromey.com>
* symfile.c (symfile_bfd_open): Update.
* source.h (openp, source_full_path_of, find_and_open_source):
Change argument type to unique_xmalloc_ptr.
* source.c (openp): Take a unique_xmalloc_ptr.
(source_full_path_of, find_and_open_source): Likewise.
(open_source_file, symtab_to_fullname): Update.
* solist.h (struct target_so_ops) <find_and_open_solib>: Take a
unique_xmalloc_ptr.
* solib.c (solib_find_1): Use unique_xmalloc_ptr.
(exec_file_find): Update.
* psymtab.c (psymtab_to_fullname): Update.
* nto-tdep.h (nto_find_and_open_solib): Update.
* nto-tdep.c (nto_find_and_open_solib): Change temp_path to a
unique_xmalloc_ptr.
* exec.c (exec_file_attach): Update.
* dwarf2read.c (try_open_dwop_file): Use unique_xmalloc_ptr.
* cli/cli-cmds.c (find_and_open_script): Use unique_xmalloc_ptr.
Rename language_get_symbol_name_matcher -> get_symbol_name_matcher,
since the function is no longer a straight "language method".
gdb/ChangeLog:
2018-01-10 Pedro Alves <palves@redhat.com>
* language.h (language_get_symbol_name_matcher): Rename ...
(get_symbol_name_matcher): ... this.
* language.c (language_get_symbol_name_matcher): Ditto.
* dictionary.c, linespec.c, minsyms.c, psymtab.c, symtab.c: All
callers adjusted.
At <https://sourceware.org/ml/gdb-patches/2017-12/msg00298.html>, Joel
wrote:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Consider the following code which first declares a tagged type (the
equivalent of a class in Ada), and then a procedure which takes a
pointer (access) to this type's 'Class.
package Pck is
type Top_T is tagged record
N : Integer := 1;
end record;
procedure Inspect (Obj: access Top_T'Class);
end Pck;
Putting a breakpoint in that procedure and then running to it triggers
an internal error:
(gdb) break inspect
(gdb) continue
Breakpoint 1, pck.inspect (obj=0x63e010
/[...]/gdb/stack.c:621: internal-error: void print_frame_args(symbol*, frame_info*, int, ui_file*): Assertion `nsym != NULL' failed.
What's special about this subprogram is that it takes an access to
what we call a 'Class type, and for implementation reasons, the
compiler adds an extra argument named "objL". If you are curious why,
it allows the compiler for perform dynamic accessibility checks that
are mandated by the language.
If we look at the location where we get the internal error (in
stack.c), we find that we are looping over the symbol of each
parameter, and for each parameter, we do:
/* We have to look up the symbol because arguments can have
two entries (one a parameter, one a local) and the one we
want is the local, which lookup_symbol will find for us.
[...]
nsym = lookup_symbol (SYMBOL_LINKAGE_NAME (sym),
b, VAR_DOMAIN, NULL).symbol;
gdb_assert (nsym != NULL);
The lookup_symbol goes through the lookup structure, which means the
symbol's linkage name ("objL") gets transformed into a
lookup_name_info object (in block_lookup_symbol), before it gets fed
to the block symbol dictionary iterators. This, in turn, triggers the
symbol matching by comparing the "lookup" name which, for Ada, means
among other things, lowercasing the given name to "objl". It is this
transformation that causes the lookup find no matches, and therefore
trip this assertion.
Going back to the "offending" call to lookup_symbol in stack.c, what
we are trying to do, here, is do a lookup by linkage name. So, I
think what we mean to be doing is a completely literal symbol lookup,
so maybe not even strcmp_iw, but actually just plain strcmp???
In the past, in practice, you could get that effect by doing a lookup
using the C language. But that doesn't work, because we still end up
somehow using Ada's lookup_name routine which transforms "objL".
So, ideally, as I hinted before, I think what we need is a way to
perform a literal lookup so that searches by linkage names like the
above can be performed.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
This commit fixes the problem by implementing something similar to
Joel's literal idea, but with some important differences.
I considered adding a symbol_name_match_type::LINKAGE and supporting
searching by linkage name for any language, but the problem with that
is that the dictionaries only work with SYMBOL_SEARCH_NAME, because
that's what is used for hashing. We'd need separate dictionaries for
hashed linkage names.
So with the current symbol tables infrastructure, it's not literal
linkage names that we want to pass down, but instead literal _search_
names (SYMBOL_SEARCH_NAME, etc.).
However, psymbols have no overload/function parameter info in C++, so
a straight strcmp doesn't work properly for C++ name matching.
So what we do is be a little less aggressive then and add a new
symbol_name_match_type::SEARCH_SYMBOL instead that takes as input a
non-user-input search symbol, and then we skip any decoding/demangling
steps and make:
- Ada treat that as a verbatim match,
- other languages treat it as symbol_name_match_type::FULL.
This also fixes the new '"maint check-psymtabs" for Ada' testcase for
me (gdb.ada/maint_with_ada.exp). I've not removed the kfail yet
because Joel still sees that testcase failing with this patch.
That'll be fixed in follow up patches.
gdb/ChangeLog:
2018-01-05 Pedro Alves <palves@redhat.com>
PR gdb/22670
* ada-lang.c (literal_symbol_name_matcher): New function.
(ada_get_symbol_name_matcher): Use it for
symbol_name_match_type::SEARCH_NAME.
* block.c (block_lookup_symbol): New parameter 'match_type'. Pass
it down instead of assuming symbol_name_match_type::FULL.
* block.h (block_lookup_symbol): New parameter 'match_type'.
* c-valprint.c (print_unpacked_pointer): Use
lookup_symbol_search_name instead of lookup_symbol.
* compile/compile-object-load.c (get_out_value_type): Pass down
symbol_name_match_type::SEARCH_NAME.
* cp-namespace.c (cp_basic_lookup_symbol): Pass down
symbol_name_match_type::FULL.
* cp-support.c (cp_get_symbol_name_matcher): Handle
symbol_name_match_type::SEARCH_NAME.
* infrun.c (insert_exception_resume_breakpoint): Use
lookup_symbol_search_name.
* p-valprint.c (pascal_val_print): Use lookup_symbol_search_name.
* psymtab.c (maintenance_check_psymtabs): Use
symbol_name_match_type::SEARCH_NAME and SYMBOL_SEARCH_NAME.
* stack.c (print_frame_args): Use lookup_symbol_search_name and
SYMBOL_SEARCH_NAME.
* symtab.c (lookup_local_symbol): Don't demangle the lookup name
if symbol_name_match_type::SEARCH_NAME.
(lookup_symbol_in_language): Pass down
symbol_name_match_type::FULL.
(lookup_symbol_search_name): New.
(lookup_language_this): Pass down
symbol_name_match_type::SEARCH_NAME.
(lookup_symbol_aux, lookup_local_symbol): New parameter
'match_type'. Pass it down.
* symtab.h (symbol_name_match_type::SEARCH_NAME): New enumerator.
(lookup_symbol_search_name): New declaration.
(lookup_symbol_in_block): New 'match_type' parameter.
gdb/testsuite/ChangeLog:
2018-01-05 Joel Brobecker <brobecker@adacore.com>
PR gdb/22670
* gdb.ada/access_tagged_param.exp: New file.
* gdb.ada/access_tagged_param/foo.adb: New file.
The code here wants to find address of an element, and often this
element is one past the end of std::vector. Dereferencing that element
leads to undefined behavior, so it's better to simply use pointer
arithmetic instead of taking address of invalid dereference.
gdb/ChangeLog:
* psymtab.c (recursively_search_psymtabs): Use pointer arithmetic
instead of dereferencing std::vector past the end.
In Rust, virtual tables work a bit differently than they do in C++. In
C++, as you know, they are connected to a particular class hierarchy.
Rust, instead, can generate a virtual table for potentially any type --
in fact, one such virtual table for each trait (a trait is similar to an
abstract class or to a Java interface) that a type implements.
Objects that are referenced via a trait can't currently be inspected by
gdb. This patch implements the Rust equivalent of "set print object".
gdb relies heavily on the C++ ABI to decode virtual tables; primarily to
make "set print object" work; but also "info vtbl". However, Rust does
not currently have a specified ABI, so this approach seems unwise to
emulate.
Instead, I've changed the Rust compiler to emit some DWARF that
describes trait objects (previously their internal structure was
opaque), vtables (currently just a size -- but I hope to expand this in
the future), and the concrete type for which a vtable was emitted.
The concrete type is expressed as a DW_AT_containing_type on the
vtable's type. This is a small extension to DWARF.
This patch adds a new entry to quick_symbol_functions to return the
symtab that holds a data address. Previously there was no way in gdb to
look up a full (only minimal) non-text symbol by address. The psymbol
implementation of this method works by lazily filling in a map that is
added to the objfile. This avoids slowing down psymbol reading for a
feature that is likely to not be used too frequently.
I did not update .gdb_index. My thinking here is that the DWARF 5
indices will obsolete .gdb_index soon-ish, meaning that adding a new
feature to them is probably wasted work. If necessary I can update the
DWARF 5 index code when it lands in gdb.
Regression tested on x86-64 Fedora 25.
2017-11-17 Tom Tromey <tom@tromey.com>
* symtab.h (struct symbol) <is_rust_vtable>: New member.
(struct rust_vtable_symbol): New.
(find_symbol_at_address): Declare.
* symtab.c (find_symbol_at_address): New function.
* symfile.h (struct quick_symbol_functions)
<find_compunit_symtab_by_address>: New member.
* symfile-debug.c (debug_qf_find_compunit_symtab_by_address): New
function.
(debug_sym_quick_functions): Link to
debug_qf_find_compunit_symtab_by_address.
* rust-lang.c (rust_get_trait_object_pointer): New function.
(rust_evaluate_subexp) <case UNOP_IND>: New case. Call
rust_get_trait_object_pointer.
* psymtab.c (psym_relocate): Clear psymbol_map.
(psym_fill_psymbol_map, psym_find_compunit_symtab_by_address): New
functions.
(psym_functions): Link to psym_find_compunit_symtab_by_address.
* objfiles.h (struct objfile) <psymbol_map>: New member.
* dwarf2read.c (dwarf2_gdb_index_functions): Update.
(process_die) <DW_TAG_variable>: New case. Call read_variable.
(rust_containing_type, read_variable): New functions.
2017-11-17 Tom Tromey <tom@tromey.com>
* gdb.rust/traits.rs: New file.
* gdb.rust/traits.exp: New file.
This patch simplifies the psymbol_hash function, by changing it not to
examine the contents of the symbol's name. This change just mirrors
what psymbol_compare already does -- it is checking for name equality,
which is ok because symbol names are interned in symbol_set_names.
This change speeds up psymbol reading. "gdb -nx -batch gdb"
previously took ~1.8 seconds on my machine, and with this patch it now
takes ~1.7 seconds.
gdb/ChangeLog
2017-11-09 Tom Tromey <tom@tromey.com>
* psymtab.c (psymbol_hash): Do not hash string contents.
(psymbol_compare): Add comment.
A few places in the completion code look for a "(" to find a
function's parameter list, in order to strip it, because psymtabs (and
gdb index) don't include parameter info in the symbol names.
See compare_symbol_name and
default_collect_symbol_completion_matches_break_on.
This is too naive. Consider:
ns_overload2_test::([TAB]
We'd want to complete that to:
ns_overload2_test::(anonymous namespace)::struct_overload2_test
Or:
b (anonymous namespace)::[TAB]
That currently completes to:
b (anonymous namespace)
Which is obviously broken. This patch makes that work.
Also, the current compare_symbol_name hack means that while this
works:
"b function([TAB]" -> "b function()"
This does not:
"b function ([TAB]"
This patch fixes that. Whitespace "ignoring" now Just Works, i.e.,
assuming a symbol named "function(int, long)", this:
b function ( int , lon[TAB]
completes to:
b function ( int , long)
To address all of this, this patch builds on top of the rest of the
series, and pushes the responsibility of stripping parameters from a
lookup name to the new lookup_name_info object, where we can apply
per-language rules. Also note that we now only make a version of the
lookup name with parameters stripped out where it's actually required
to do that, in the psymtab and GDB index code.
For C++, the right way to strip parameters is with "cp_remove_params",
which uses a real parser (cp-name-parser.y) to split the name into a
component tree and then discards parameters.
The trouble for completion is that in that case we have an incomplete
name, like "foo::func(int" and thus cp_remove_params throws an error.
This patch sorts that by adding a cp_remove_params_if_any variant of
cp_remove_params that tries removing characters from the end of the
string until cp_remove_params works. So cp_remove_params_if_any
behaves like this:
With a complete name:
"foo::func(int)" => foo::func(int) # cp_remove_params_1 succeeds the first time.
With an incomplete name:
"foo::func(int" => NULL # cp_remove_params fails the first time.
"foo::func(in" => NULL # and again...
"foo::func(i" => NULL # and again...
"foo::func(" => NULL # and again...
"foo::func" => "foo::func" # success!
Note that even if this approach removes significant rightmost
characters, it's still OK, because this parameter stripping is only
necessary for psymtabs and gdb index, where we're determining whether
to expand a symbol table. Say cp_remove_params_if_any returned
"foo::" above for "foo::func(int". That'd cause us to expand more
symtabs than ideal (because we'd expand all symtabs with symbols that
start with "foo::", not just "foo::func"), but then when we actually
look for completion matches, we'd still use the original lookup name,
with parameter information ["foo::func(int"], and thus we'll return no
false positive to the user. Whether the stripping works as intended
and doesn't strip too much is thus covered by a unit test instead of a
testsuite test.
The "if_any" part of the name refers to the fact that while
cp_remove_params returns NULL if the input name has no parameters in
the first place, like:
"foo::func" => NULL # cp_remove_params
cp_remove_params_if_any still returns the function name:
"foo::func" => "foo::func" # cp_remove_params_if_any
gdb/ChangeLog:
2017-11-08 Pedro Alves <palves@redhat.com>
* Makefile.in (SUBDIR_UNITTESTS_SRCS): Add
unittests/lookup_name_info-selftests.c.
(SUBDIR_UNITTESTS_OBS): Add lookup_name_info-selftests.o.
* cp-support.c: Include "selftest.h".
(cp_remove_params_1): Rename from cp_remove_params. Add
'require_param' parameter, and handle it.
(cp_remove_params): Reimplement.
(cp_remove_params_if_any): New.
(selftests::quote): New.
(selftests::check_remove_params): New.
(selftests::test_cp_remove_params): New.
(_initialize_cp_support): Install
selftests::test_cp_remove_params.
* cp-support.h (cp_remove_params_if_any): Declare.
* dwarf2read.c :Include "selftest.h".
(dw2_expand_symtabs_matching_symbol): Use
lookup_name_info::make_ignore_params.
(selftests::dw2_expand_symtabs_matching::mock_mapped_index)
(selftests::dw2_expand_symtabs_matching::string_or_null)
(selftests::dw2_expand_symtabs_matching::check_match)
(selftests::dw2_expand_symtabs_matching::test_symbols)
(selftests::dw2_expand_symtabs_matching::run_test): New.
(_initialize_dwarf2_read): Register
selftests::dw2_expand_symtabs_matching::run_test.
* psymtab.c (psym_expand_symtabs_matching): Use
lookup_name_info::make_ignore_params.
* symtab.c (demangle_for_lookup_info::demangle_for_lookup_info):
If the lookup name wants to ignore parameters, strip them.
(compare_symbol_name): Remove sym_text/sym_text_len parameters and
code handling '('.
(completion_list_add_name): Don't pass down sym_text/sym_text_len.
(default_collect_symbol_completion_matches_break_on): Don't try to
strip parameters.
* symtab.h (lookup_name_info::lookup_name_info): Add
'ignore_parameters' parameter.
(lookup_name_info::ignore_parameters)
(lookup_name_info::make_ignore_params): New methods.
(lookup_name_info::m_ignore_parameters): New field.
* unittests/lookup_name_info-selftests.c: New file.
Summary:
- This is preparation for supporting wild name matching on C++ too.
- This is also preparation for TAB-completion fixes.
- Makes symbol name matching (think strcmp_iw) be based on a per-language method.
- Merges completion and non-completion name comparison (think
language_ops::la_get_symbol_name_cmp generalized).
- Avoid re-hashing lookup name multiple times
- Centralizes preparing a name for lookup (Ada name encoding / C++ Demangling),
both completion and non-completion.
- Fixes Ada latent bug with verbatim name matches in expressions
- Makes ada-lang.c use common|symtab.c completion code a bit more.
Ada's wild matching basically means that
"(gdb) break foo"
will find all methods named "foo" in all packages. Translating to
C++, it's roughly the same as saying that "break klass::method" sets
breakpoints on all "klass::method" methods of all classes, no matter
the namespace. A following patch will teach GDB about fullname vs
wild matching for C++ too. This patch is preparatory work to get
there.
Another idea here is to do symbol name matching based on the symbol
language's algorithm. I.e., avoid dependency on current language set.
This allows for example doing
(gdb) b foo::bar< int > (<tab>
and having gdb name match the C++ symbols correctly even if the
current language is C or Assembly (or Rust, or Ada, or ...), which can
easily happen if you step into an Assembly/C runtime library frame.
By encapsulating all the information related to a lookup name in a
class, we can also cache hash computation for a given language in the
lookup name object, to avoid recomputing it over and over.
Similarly, because we don't really know upfront which languages the
lookup name will be matched against, for each language we store the
lookup name transformed into a search name. E.g., for C++, that means
demangling the name. But for Ada, it means encoding the name. This
actually forces us to centralize all the different lookup name
encoding in a central place, resulting in clearer code, IMO. See
e.g., the new ada_lookup_name_info class.
The lookup name -> symbol search name computation is also done only
once per language.
The old language->la_get_symbol_name_cmp / symbol_name_cmp_ftype are
generalized to work with both completion, and normal symbol look up.
At some point early on, I had separate completion vs non-completion
language vector entry points, but a single method ends up being better
IMO for simplifying things -- the more we merge the completion /
non-completion name lookup code paths, the less changes for bugs
causing completion vs normal lookup finding different symbols.
The ada-lex.l change is necessary because when doing
(gdb) p <UpperCase>
then the name that is passed to write_ write_var_or_type ->
ada_lookup_symbol_list misses the "<>", i.e., it's just "UpperCase",
and we end up doing a wild match against "UpperCase" lowercased by
ada_lookup_name_info's constructor. I.e., "uppercase" wouldn't ever
match "UpperCase", and the symbol lookup fails.
This wouldn't cause any regression in the testsuite, but I added a new
test that would pass before the patch and fail after, if it weren't
for that fix.
This is latent bug that happens to go unnoticed because that
particular path was inconsistent with the rest of Ada symbol lookup by
not lowercasing the lookup name.
Ada's symbol_completion_add is deleted, replaced by using common
code's completion_list_add_name. To make the latter work for Ada, we
needed to add a new output parameter, because Ada wants to return back
a custom completion candidates that are not the symbol name.
With this patch, minimal symbol demangled name hashing is made
consistent with regular symbol hashing. I.e., it now goes via the
language vector's search_name_hash method too, as I had suggested in a
previous patch.
dw2_expand_symtabs_matching / .gdb_index symbol names were a
challenge. The problem is that we have no way to telling what is the
language of each symbol name found in the index, until we expand the
corresponding full symbol, which is off course what we're trying to
avoid. Language information is simply not considered in the index
format... Since the symbol name hashing and comparison routines are
per-language, we now have a problem. The patch sorts this out by
matching each name against all languages. This is inneficient, and
indeed slows down completion several times. E.g., with:
$ cat script.cmd
set pagination off
set $count = 0
while $count < 400
complete b string_prin
printf "count = %d\n", $count
set $count = $count + 1
end
$ time gdb --batch -q ./gdb-with-index -ex "source script-string_printf.cmd"
I get, before patch (-O2, x86-64):
real 0m1.773s
user 0m1.737s
sys 0m0.040s
While after patch (-O2, x86-64):
real 0m9.843s
user 0m9.482s
sys 0m0.034s
However, the following patch will optimize this, and will actually
make this use case faster compared to the "before patch" above:
real 0m1.321s
user 0m1.285s
sys 0m0.039s
gdb/ChangeLog:
2017-11-08 Pedro Alves <palves@redhat.com>
* ada-lang.c (ada_encode): Rename to ..
(ada_encode_1): ... this. Add throw_errors parameter and handle
it.
(ada_encode): Reimplement.
(match_name): Delete, folded into full_name.
(resolve_subexp): No longer pass the encoded name to
ada_lookup_symbol_list.
(should_use_wild_match): Delete.
(name_match_type_from_name): New.
(ada_lookup_simple_minsym): Use lookup_name_info and the
language's symbol_name_matcher_ftype.
(add_symbols_from_enclosing_procs, ada_add_local_symbols)
(ada_add_block_renamings): Adjust to use lookup_name_info.
(ada_lookup_name): New.
(add_nonlocal_symbols, ada_add_all_symbols)
(ada_lookup_symbol_list_worker, ada_lookup_symbol_list)
(ada_iterate_over_symbols): Adjust to use lookup_name_info.
(ada_name_for_lookup): Delete.
(ada_lookup_encoded_symbol): Construct a verbatim name.
(wild_match): Reverse sense of return type. Use bool.
(full_match): Reverse sense of return type. Inline bits of old
match_name here.
(ada_add_block_symbols): Adjust to use lookup_name_info.
(symbol_completion_match): Delete, folded into...
(ada_lookup_name_info::matches): ... .this new method.
(symbol_completion_add): Delete.
(ada_collect_symbol_completion_matches): Add name_match_type
parameter. Adjust to use lookup_name_info and
completion_list_add_name.
(get_var_value, ada_add_global_exceptions): Adjust to use
lookup_name_info.
(ada_get_symbol_name_cmp): Delete.
(do_wild_match, do_full_match): New functions.
(ada_lookup_name_info::ada_lookup_name_info): New method.
(ada_symbol_name_matches, ada_get_symbol_name_matcher): New
functions.
(ada_language_defn): Install ada_get_symbol_name_matcher.
* ada-lex.l (processId): If name starts with '<', copy it
verbatim.
* block.c (block_iter_match_step, block_iter_match_first)
(block_iter_match_next, block_lookup_symbol)
(block_lookup_symbol_primary, block_find_symbol): Adjust to use
lookup_name_info.
* block.h (block_iter_match_first, block_iter_match_next)
(ALL_BLOCK_SYMBOLS_WITH_NAME): Adjust to use lookup_name_info.
* c-lang.c (c_language_defn, cplus_language_defn)
(asm_language_defn, minimal_language_defn): Adjust comments to
refer to la_get_symbol_name_matcher.
* completer.c (complete_files_symbols)
(collect_explicit_location_matches, symbol_completer): Pass a
symbol_name_match_type down.
* completer.h (class completion_match, completion_match_result):
New classes.
(completion_tracker::reset_completion_match_result): New method.
(completion_tracker::m_completion_match_result): New field.
* cp-support.c (make_symbol_overload_list_block): Adjust to use
lookup_name_info.
(cp_fq_symbol_name_matches, cp_get_symbol_name_matcher): New
functions.
* cp-support.h (cp_get_symbol_name_matcher): New declaration.
* d-lang.c: Adjust comments to refer to
la_get_symbol_name_matcher.
* dictionary.c (dict_vector) <iter_match_first, iter_match_next>:
Adjust to use lookup_name_info.
(dict_iter_match_first, dict_iter_match_next)
(iter_match_first_hashed, iter_match_next_hashed)
(iter_match_first_linear, iter_match_next_linear): Adjust to work
with a lookup_name_info.
* dictionary.h (dict_iter_match_first, dict_iter_match_next):
Likewise.
* dwarf2read.c (dw2_lookup_symbol): Adjust to use lookup_name_info.
(dw2_map_matching_symbols): Adjust to use symbol_name_match_type.
(gdb_index_symbol_name_matcher): New class.
(dw2_expand_symtabs_matching) Adjust to use lookup_name_info and
gdb_index_symbol_name_matcher. Accept a NULL symbol_matcher.
* f-lang.c (f_collect_symbol_completion_matches): Adjust to work
with a symbol_name_match_type.
(f_language_defn): Adjust comments to refer to
la_get_symbol_name_matcher.
* go-lang.c (go_language_defn): Adjust comments to refer to
la_get_symbol_name_matcher.
* language.c (default_symbol_name_matcher)
(language_get_symbol_name_matcher): New functions.
(unknown_language_defn, auto_language_defn): Adjust comments to
refer to la_get_symbol_name_matcher.
* language.h (symbol_name_cmp_ftype): Delete.
(language_defn) <la_collect_symbol_completion_matches>: Add match
type parameter.
<la_get_symbol_name_cmp>: Delete field.
<la_get_symbol_name_matcher>: New field.
<la_iterate_over_symbols>: Adjust to use lookup_name_info.
(default_symbol_name_matcher, language_get_symbol_name_matcher):
Declare.
* linespec.c (iterate_over_all_matching_symtabs)
(iterate_over_file_blocks): Adjust to use lookup_name_info.
(find_methods): Add language parameter, and use lookup_name_info
and the language's symbol_name_matcher_ftype.
(linespec_complete_function): Adjust.
(lookup_prefix_sym): Use lookup_name_info.
(add_all_symbol_names_from_pspace): Adjust.
(find_superclass_methods): Add language parameter and pass it
down.
(find_method): Pass symbol language down.
(find_linespec_symbols): Don't demangle or Ada encode here.
(search_minsyms_for_name): Add lookup_name_info parameter.
(add_matching_symbols_to_info): Add name_match_type parameter.
Use lookup_name_info.
* m2-lang.c (m2_language_defn): Adjust comments to refer to
la_get_symbol_name_matcher.
* minsyms.c: Include <algorithm>.
(add_minsym_to_demangled_hash_table): Remove table parameter and
add objfile parameter. Use search_name_hash, and add language to
demangled languages vector.
(struct found_minimal_symbols): New struct.
(lookup_minimal_symbol_mangled, lookup_minimal_symbol_demangled):
New functions.
(lookup_minimal_symbol): Adjust to use them. Don't canonicalize
input names here. Use lookup_name_info instead. Lookup up
demangled names once for each language in the demangled names
vector.
(iterate_over_minimal_symbols): Use lookup_name_info. Lookup up
demangled names once for each language in the demangled names
vector.
(build_minimal_symbol_hash_tables): Adjust.
* minsyms.h (iterate_over_minimal_symbols): Adjust to pass down a
lookup_name_info.
* objc-lang.c (objc_language_defn): Adjust comment to refer to
la_get_symbol_name_matcher.
* objfiles.h: Include <vector>.
(objfile_per_bfd_storage) <demangled_hash_languages>: New field.
* opencl-lang.c (opencl_language_defn): Adjust comment to refer to
la_get_symbol_name_matcher.
* p-lang.c (pascal_language_defn): Adjust comment to refer to
la_get_symbol_name_matcher.
* psymtab.c (psym_lookup_symbol): Use lookup_name_info.
(match_partial_symbol): Use symbol_name_match_type,
lookup_name_info and psymbol_name_matches.
(lookup_partial_symbol): Use lookup_name_info.
(map_block): Use symbol_name_match_type and lookup_name_info.
(psym_map_matching_symbols): Use symbol_name_match_type.
(psymbol_name_matches): New.
(recursively_search_psymtabs): Use lookup_name_info and
psymbol_name_matches. Rename 'kind' parameter to 'domain'.
(psym_expand_symtabs_matching): Use lookup_name_info. Rename
'kind' parameter to 'domain'.
* rust-lang.c (rust_language_defn): Adjust comment to refer to
la_get_symbol_name_matcher.
* symfile-debug.c (debug_qf_map_matching_symbols)
(debug_qf_map_matching_symbols): Use symbol_name_match_type.
(debug_qf_expand_symtabs_matching): Use lookup_name_info.
* symfile.c (expand_symtabs_matching): Use lookup_name_info.
* symfile.h (quick_symbol_functions) <map_matching_symbols>:
Adjust to use symbol_name_match_type.
<expand_symtabs_matching>: Adjust to use lookup_name_info.
(expand_symtabs_matching): Adjust to use lookup_name_info.
* symmisc.c (maintenance_expand_symtabs): Use
lookup_name_info::match_any ().
* symtab.c (symbol_matches_search_name): New.
(eq_symbol_entry): Adjust to use lookup_name_info and the
language's matcher.
(demangle_for_lookup_info::demangle_for_lookup_info): New.
(lookup_name_info::match_any): New.
(iterate_over_symbols, search_symbols): Use lookup_name_info.
(compare_symbol_name): Add language, lookup_name_info and
completion_match_result parameters, and use them.
(completion_list_add_name): Make extern. Add language and
lookup_name_info parameters. Use them.
(completion_list_add_symbol, completion_list_add_msymbol)
(completion_list_objc_symbol): Add lookup_name_info parameters and
adjust. Pass down language.
(completion_list_add_fields): Add lookup_name_info parameters and
adjust. Pass down language.
(add_symtab_completions): Add lookup_name_info parameters and
adjust.
(default_collect_symbol_completion_matches_break_on): Add
name_match_type parameter, and use it. Use lookup_name_info.
(default_collect_symbol_completion_matches)
(collect_symbol_completion_matches): Add name_match_type
parameter, and pass it down.
(collect_symbol_completion_matches_type): Adjust.
(collect_file_symbol_completion_matches): Add name_match_type
parameter, and use lookup_name_info.
* symtab.h: Include <string> and "common/gdb_optional.h".
(enum class symbol_name_match_type): New.
(class ada_lookup_name_info): New.
(struct demangle_for_lookup_info): New.
(class lookup_name_info): New.
(symbol_name_matcher_ftype): New.
(SYMBOL_MATCHES_SEARCH_NAME): Use symbol_matches_search_name.
(symbol_matches_search_name): Declare.
(MSYMBOL_MATCHES_SEARCH_NAME): Delete.
(default_collect_symbol_completion_matches)
(collect_symbol_completion_matches)
(collect_file_symbol_completion_matches): Add name_match_type
parameter.
(iterate_over_symbols): Use lookup_name_info.
(completion_list_add_name): Declare.
* utils.c (enum class strncmp_iw_mode): Moved to utils.h.
(strncmp_iw_with_mode): Now extern.
* utils.h (enum class strncmp_iw_mode): Moved from utils.c.
(strncmp_iw_with_mode): Declare.
gdb/testsuite/ChangeLog:
2017-11-08 Pedro Alves <palves@redhat.com>
* gdb.ada/complete.exp (p <Exported_Capitalized>): New test.
(p Exported_Capitalized): New test.
(p exported_capitalized): New test.
psymbol_allocation_list is basically a vector implementation. We can
replace it with an std::vector, now that objfile has been C++-ified.
I sent this to the buildbot, there are a few suspicious failures, but
I don't think they are related to this patch. For example on powerpc:
new FAIL: gdb.base/catch-syscall.exp: execve: syscall execve has returned
new FAIL: gdb.base/catch-syscall.exp: execve: continue to main
new FAIL: gdb.base/catch-syscall.exp: execve: continue until exit
I get the same failures when testing manually on gcc112, without this
patch.
gdb/ChangeLog:
* objfiles.h: Don't include symfile.h.
(struct partial_symbol): Remove forward-declaration.
(struct objfile) <global_psymbols, static_psymbols>: Change type
to std::vector<partial_symbol *>.
* objfiles.c (objfile::objfile): Don't memset those fields.
(objfile::~objfile): Don't free those fields.
* psympriv.h (struct psymbol_allocation_list): Remove
forward-declaration.
(add_psymbol_to_list): Change psymbol_allocation_list parameter
to std::vector.
(start_psymtab_common): Change parameters to std::vector.
* psymtab.c: Include algorithm.
(require_partial_symbols): Call shrink_to_fit.
(find_pc_sect_psymbol): Adjust to vector change.
(match_partial_symbol): Likewise.
(lookup_partial_symbol): Likewise.
(psym_relocate): Likewise.
(dump_psymtab): Likewise.
(recursively_search_psymtabs): Likewise.
(compare_psymbols): Remove.
(sort_pst_symbols): Adjust to vector change.
(start_psymtab_common): Likewise.
(end_psymtab_common): Likewise.
(psymbol_bcache_full): De-constify return value.
(add_psymbol_to_bcache): Likewise.
(extend_psymbol_list): Remove.
(append_psymbol_to_list): Adjust to vector change.
(add_psymbol_to_list): Likewise.
(init_psymbol_list): Likewise.
(maintenance_info_psymtabs): Likewise.
(maintenance_check_psymtabs): Likewise.
* symfile.h (struct psymbol_allocation_list): Remove.
* symfile.c (reread_symbols): Adjust to vector change.
* dbxread.c (start_psymtab): Change type of parameters.
(dbx_symfile_read): Adjust to vector change.
(read_dbx_symtab): Likewise.
(start_psymtab): Change type of parameters.
* dwarf2read.c (dwarf2_build_psymtabs): Adjust to vector change.
(create_partial_symtab): Likewise.
(add_partial_symbol): Likewise.
(write_one_signatured_type): Likewise.
(recursively_write_psymbols): Likewise.
* mdebugread.c (parse_partial_symbols): Likewise.
* xcoffread.c (xcoff_start_psymtab): Change type of parameters.
(scan_xcoff_symtab): Adjust to vector change.
(xcoff_initial_scan): Likewise.
Use the type system instead of callers needing to know how the
returned string's memory is supposed to be managed.
gdb/ChangeLog:
2017-10-09 Pedro Alves <palves@redhat.com>
* cp-support.c (cp_remove_params): Return a gdb::unique_xmalloc_ptr.
Use bool.
(overload_list_add_symbol): Adjust to use gdb::unique_xmalloc_ptr.
* cp-support.h (cp_remove_params): Now returns a
gdb::unique_xmalloc_ptr.
* dwarf2read.c (find_slot_in_mapped_hash): Now returns bool.
Adjust to cp_remove_params returning a gdb::unique_xmalloc_ptr.
* psymtab.c (psymtab_search_name): Adjust to cp_remove_params
returning a gdb::unique_xmalloc_ptr.
(lookup_partial_symbol): Adjust to use gdb::unique_xmalloc_ptr.
* stack.c (find_frame_funname): Adjust to cp_remove_params
returning a gdb::unique_xmalloc_ptr.
This changes psymtab_search_name to return a unique_xmalloc_ptr and
fixes up its one caller. This allows the removal of some cleanups.
ChangeLog
2017-08-22 Tom Tromey <tom@tromey.com>
* psymtab.c (psymtab_search_name): Return a unique_xmalloc_ptr.
(lookup_partial_symbol): Update.
This changes rewrite_source_path to return a unique_xmalloc_ptr and
fixes up the callers. This allows removing some cleanups.
ChangeLog
2017-08-22 Tom Tromey <tom@tromey.com>
* source.h (rewrite_source_path): Return a unique_xmalloc_ptr.
* source.c (rewrite_source_path): Return a unique_xmalloc_ptr.
(find_and_open_source, symtab_to_fullname): Update.
* psymtab.c (psymtab_to_fullname): Update.
This patch changes most sites calling tilde_expand to use
gdb::unique_xmalloc_ptr, rather than a cleanup. It also changes
scan_expression_with_cleanup to return a unique pointer, because the
patch was already touching code in that area.
Regression tested on the buildbot.
ChangeLog
2017-08-05 Tom Tromey <tom@tromey.com>
* compile/compile-object-load.c (compile_object_load): Use
gdb::unique_xmalloc_ptr.
* cli/cli-dump.c (scan_filename): Rename from
scan_filename_with_cleanup. Change return type.
(scan_expression): Rename from scan_expression_with_cleanup.
Change return type.
(dump_memory_to_file, dump_value_to_file, restore_command):
Use gdb::unique_xmalloc_ptr. Update.
* cli/cli-cmds.c (find_and_open_script): Use
gdb::unique_xmalloc_ptr.
* tracefile-tfile.c (tfile_open): Use gdb::unique_xmalloc_ptr.
* symmisc.c (maintenance_print_symbols)
(maintenance_print_msymbols): Use gdb::unique_xmalloc_ptr.
* symfile.c (symfile_bfd_open, generic_load)
(add_symbol_file_command, remove_symbol_file_command): Use
gdb::unique_xmalloc_ptr.
* source.c (openp): Use gdb::unique_xmalloc_ptr.
* psymtab.c (maintenance_print_psymbols): Use
gdb::unique_xmalloc_ptr.
* corelow.c (core_open): Use gdb::unique_xmalloc_ptr.
* breakpoint.c (save_breakpoints): Use gdb::unique_xmalloc_ptr.
* solib.c (solib_map_sections): Use gdb::unique_xmalloc_ptr.
(reload_shared_libraries_1): Likewise.
This introduces gdb_argv, a class wrapping an "argv" pointer; that is,
a pointer to a NULL-terminated array of char*, where both the array
and each non-NULL element in the array are xmalloc'd.
This patch then changes most users of gdb_buildargv to use gdb_argv
instead.
ChangeLog
2017-08-03 Tom Tromey <tom@tromey.com>
* utils.h (struct gdb_argv_deleter): New.
(gdb_argv): New class.
* utils.c (gdb_argv::reset): New method.
* tracepoint.c (delete_trace_variable_command): Use gdb_argv.
* tracefile.c (tsave_command): Use gdb_argv.
* top.c (new_ui_command): Use gdb_argv.
* symmisc.c (maintenance_print_symbols)
(maintenance_print_msymbols, maintenance_expand_symtabs): Use gdb_argv.
* symfile.c (symbol_file_command, generic_load)
(remove_symbol_file_command): Use gdb_argv.
* stack.c (backtrace_command): Use gdb_argv.
* source.c (add_path, show_substitute_path_command)
(unset_substitute_path_command, set_substitute_path_command):
Use gdb_argv.
* skip.c (skip_command): Use gdb_argv. Use gdb_buildargv.
* ser-mingw.c (pipe_windows_open): Use gdb_argv.
* remote.c (extended_remote_run, remote_put_command)
(remote_get_command, remote_delete_command): Use gdb_argv.
* remote-sim.c (gdbsim_load, gdbsim_create_inferior)
(gdbsim_open): Use gdb_argv.
* python/py-cmd.c (gdbpy_string_to_argv): Use gdb_argv.
* psymtab.c (maintenance_print_psymbols): Use gdb_argv.
* procfs.c (procfs_info_proc): Use gdb_argv.
* interps.c (interpreter_exec_cmd): Use gdb_argv.
* infrun.c (handle_command): Use gdb_argv.
* inferior.c (add_inferior_command, clone_inferior_command):
Use gdb_argv.
* guile/scm-string.c (gdbscm_string_to_argv): Use gdb_argv.
* exec.c (exec_file_command): Use gdb_argv.
* cli/cli-cmds.c (alias_command): Use gdb_argv.
* compile/compile.c (build_argc_argv): Use gdb_argv.
gdb/ChangeLog:
2017-07-20 Pedro Alves <palves@redhat.com>
* dwarf2read.c (dw2_lookup_symbol): Use
SYMBOL_MATCHES_SEARCH_NAME.
* psymtab.c (psym_lookup_symbol): Use SYMBOL_MATCHES_SEARCH_NAME.
This changes increment_reading_symtab to return a scoped_restore, then
fixes up the users.
gdb/ChangeLog
2017-04-12 Tom Tromey <tom@tromey.com>
* symfile.h (increment_reading_symtab): Update type.
* symfile.c (decrement_reading_symtab): Remove.
(increment_reading_symtab): Return a scoped_restore_tmpl<int>.
* psymtab.c (psymtab_to_symtab): Update.
* dwarf2read.c (dw2_instantiate_symtab): Update.
Pedro Alves
Tom Tromey
Joel Brobecker
Simon Marchi
Ruslan Kabatsayev
John Baldwin