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Introduce class completion_tracker & rewrite completion<->readline interaction

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This patch reworks the whole completion machinery, and prepares it
for later enhancements.

Adds a new "completion_tracker" class that is meant to hold everything
about the state of the current completion operation.

This class now has the responsibility of tracking the list of
completion matches, and checking whether the max completions limit has
been reached.  You can look at this as this patch starting out by
C++fying the existing "completion_tracker" in symtab.c (it's just an
htab_t typedef currently), moving it to completer.h/c, and then making
it a class/generalizing/enhancing it.

Unlike with the current tracking, completion_tracker now checks
whether the limit has been reached on each completion match list
insertion.  This both simplifies the max-completions handling code
(maybe_add_completion_enum is gone, for example), and is a
prerequisite for follow up patches.

The current completion_tracker is only used for symbol completions,
and the symbol code gets at the current instance via globals.  This
patch cleans that up by adding a completion_tracker reference to the
signature of the completion functions, and passing the tracker around
everywhere necessary.

Then, the patch changes how the completion match list is handed over
to readline.  Currently, we're using the rl_completion_entry_function
readline entry point, and the patch switches to
rl_attempted_completion_function.  A following patch will want to let
GDB itself decide the common completion prefix between all matches
(what readline calls the "lowest common denominator"), instead of
having readline compute it, and that's not possible with the
rl_completion_entry_function entry point.  Also,
rl_attempted_completion_function lets GDB hand over the match list to
readline as an array in one go instead of passing down matches one by
one, so from that angle it's a nicer entry point anyway.

Lastly, the patch catches exceptions around the readline entry points,
because we can't let C++ exceptions cross readline.  We handle that in
the readline input entry point, but the completion entry point isn't
guarded, so GDB can abort if completion throws.  E.g., in current
master:

 (gdb) b -function "fun<tab>
 terminate called after throwing an instance of 'gdb_exception_RETURN_MASK_ERROR'
 Aborted (core dumped)

This patch fixes that.  This will be exercised in the new tests added
later on in the series.

gdb/ChangeLog:
2017-07-17  Pedro Alves  <palves@redhat.com>

	* ada-lang.c (symbol_completion_match): Adjust comments.
	(symbol_completion_add): Replace vector parameter with
	completion_tracker parameter.  Use it.
	(ada_make_symbol_completion_list): Rename to...
	(ada_collect_symbol_completion_matches): ... this.  Add
	completion_tracker parameter and use it.
	(ada_language_defn): Adjust.
	* break-catch-syscall.c (catch_syscall_completer): Adjust
	prototype and work with completion_tracker instead of VEC.
	* breakpoint.c (condition_completer): Adjust prototype and work
	with completion_tracker instead of VEC.
	* c-lang.c (c_language_defn, cplus_language_defn)
	(asm_language_defn, minimal_language_defn): Adjust to renames.
	* cli/cli-cmds.c (complete_command): Rework using
	completion_tracker.  Catch exceptions when completing.
	* cli/cli-decode.c (integer_unlimited_completer)
	(complete_on_cmdlist, complete_on_enum): Adjust prototype and work
	with completion_tracker instead of VEC.
	* command.h (struct completion_tracker): Forward declare.
	(completer_ftype, completer_handle_brkchars_ftype): Change
	types.
	(complete_on_cmdlist, complete_on_enum): Adjust.
	* completer.c: Include <algorithm>.
	(struct gdb_completer_state): New.
	(current_completion): New global.
	(readline_line_completion_function): Delete.
	(noop_completer, filename_completer)
	(filename_completer_handle_brkchars, complete_files_symbols)
	(linespec_location_completer): Adjust to work with a
	completion_tracker instead of a VEC.
	(string_or_empty): New.
	(collect_explicit_location_matches): Adjust to work with a
	completion_tracker instead of a VEC.
	(explicit_location_completer): Rename to ...
	(complete_explicit_location): ... this and adjust to work with a
	completion_tracker instead of a VEC.
	(location_completer): Adjust to work with a completion_tracker
	instead of a VEC.
	(add_struct_fields): Adjust to work with a completion_list instead
	of VEC.
	(expression_completer): Rename to ...
	(complete_expression): ... this and adjust to work with a
	completion_tracker instead of a VEC.  Use complete_files_symbols.
	(expression_completer): Reimplement on top of complete_expression.
	(symbol_completer): Adjust to work with a completion_tracker
	instead of a VEC.
	(enum complete_line_internal_reason): Add describing comments.
	(complete_line_internal_normal_command): Adjust to work with a
	completion_tracker instead of a VEC.
	(complete_line_internal): Rename to ...
	(complete_line_internal_1): ... this and adjust to work with a
	completion_tracker instead of a VEC.  Assert TEXT is NULL in the
	handle_brkchars phase.
	(new_completion_tracker): Delete.
	(complete_line_internal): Reimplement as TRY/CATCH wrapper around
	complete_line_internal_1.
	(free_completion_tracker): Delete.
	(INITIAL_COMPLETION_HTAB_SIZE): New.
	(completion_tracker::completion_tracker)
	(completion_tracker::~completion_tracker): New.
	(maybe_add_completion): Delete.
	(completion_tracker::maybe_add_completion)
	(completion_tracker::add_completion)
	(completion_tracker::add_completions): New.
	(throw_max_completions_reached_error): Delete.
	(complete_line): Adjust to work with a completion_tracker instead
	of a VEC.  Don't create a completion_tracker_t or check for max
	completions here.
	(command_completer, command_completer_handle_brkchars)
	(signal_completer, reg_or_group_completer_1)
	(reg_or_group_completer, default_completer_handle_brkchars):
	Adjust to work with a completion_tracker.
	(gdb_completion_word_break_characters_throw): New.
	(gdb_completion_word_break_characters): Reimplement.
	(line_completion_function): Delete.
	(completion_tracker::recompute_lowest_common_denominator)
	(expand_preserving_ws)
	(completion_tracker::build_completion_result)
	(completion_result::completion_result)
	(completion_result::completion_result)
	(completion_result::~completion_result)
	(completion_result::completion_result)
	(completion_result::release_match_list, compare_cstrings)
	(completion_result::sort_match_list)
	(completion_result::reset_match_list)
	(gdb_rl_attempted_completion_function_throw)
	(gdb_rl_attempted_completion_function): New.
	* completer.h (completion_list, struct completion_result)
	(class completion_tracker): New.
	(complete_line): Add completion_tracker parameter.
	(readline_line_completion_function): Delete.
	(gdb_rl_attempted_completion_function): New.
	(noop_completer, filename_completer, expression_completer)
	(location_completer, symbol_completer, command_completer)
	(signal_completer, reg_or_group_completer): Update prototypes.
	(completion_tracker_t, new_completion_tracker)
	(make_cleanup_free_completion_tracker): Delete.
	(enum maybe_add_completion_enum): Delete.
	(maybe_add_completion): Delete.
	(throw_max_completions_reached_error): Delete.
	* corefile.c (complete_set_gnutarget): Adjust to work with a
	completion_tracker instead of a VEC.
	* cp-abi.c (cp_abi_completer): Adjust to work with a
	completion_tracker instead of a VEC.
	* d-lang.c (d_language_defn): Adjust.
	* disasm.c (disassembler_options_completer): Adjust to work with a
	completion_tracker instead of a VEC.
	* f-lang.c (f_make_symbol_completion_list): Rename to ...
	(f_collect_symbol_completion_matches): ... this.  Adjust to work
	with a completion_tracker instead of a VEC.
	(f_language_defn): Adjust.
	* go-lang.c (go_language_defn): Adjust.
	* guile/scm-cmd.c (cmdscm_add_completion, cmdscm_completer):
	Adjust to work with a completion_tracker instead of a VEC.
	* infrun.c (handle_completer): Likewise.
	* interps.c (interpreter_completer): Likewise.
	* interps.h (interpreter_completer): Likewise.
	* language.c (unknown_language_defn, auto_language_defn)
	(local_language_defn): Adjust.
	* language.h (language_defn::la_make_symbol_completion_list):
	Rename to ...
	(language_defn::la_collect_symbol_completion_matches): ... this
	and adjust to work with a completion_tracker instead of a VEC.
	* m2-lang.c (m2_language_defn): Adjust.
	* objc-lang.c (objc_language_defn): Adjust.
	* opencl-lang.c (opencl_language_defn): Adjust.
	* p-lang.c (pascal_language_defn): Adjust.
	* python/py-cmd.c (cmdpy_completer_helper): Handle NULL word.
	(cmdpy_completer_handle_brkchars, cmdpy_completer): Adjust to work
	with a completion_tracker.
	* rust-lang.c (rust_language_defn): Adjust.
	* symtab.c (free_completion_list, do_free_completion_list)
	(return_val, completion_tracker): Delete.
	(completion_list_add_name, completion_list_add_symbol)
	(completion_list_add_msymbol, completion_list_objc_symbol)
	(completion_list_add_fields, add_symtab_completions): Add
	completion_tracker parameter and use it.
	(default_make_symbol_completion_list_break_on_1): Rename to...
	(default_collect_symbol_completion_matches_break_on): ... this.
	Add completion_tracker parameter and use it instead of allocating
	a completion tracker here.
	(default_make_symbol_completion_list_break_on): Delete old
	implementation.
	(default_make_symbol_completion_list): Delete.
	(default_collect_symbol_completion_matches): New.
	(make_symbol_completion_list): Delete.
	(collect_symbol_completion_matches): New.
	(make_symbol_completion_type): Rename to ...
	(collect_symbol_completion_matches_type): ... this.  Add
	completion_tracker parameter and use it instead of VEC.
	(make_file_symbol_completion_list_1): Rename to...
	(collect_file_symbol_completion_matches): ... this.  Add
	completion_tracker parameter and use it instead of VEC.
	(make_file_symbol_completion_list): Delete.
	(add_filename_to_list): Use completion_list instead of a VEC.
	(add_partial_filename_data::list): Now a completion_list.
	(make_source_files_completion_list): Work with a completion_list
	instead of a VEC.
	* symtab.h: Include "completer.h".
	(default_make_symbol_completion_list_break_on)
	(default_make_symbol_completion_list, make_symbol_completion_list)
	(make_symbol_completion_type, make_file_symbol_completion_list)
	(make_source_files_completion_list): Delete.
	(default_collect_symbol_completion_matches_break_on)
	(default_collect_symbol_completion_matches)
	(collect_symbol_completion_matches)
	(collect_symbol_completion_matches_type)
	(collect_file_symbol_completion_matches)
	(make_source_files_completion_list): New.
	* top.c (init_main): Don't install a rl_completion_entry_function
	hook.  Install a rl_attempted_completion_function hook instead.
	* tui/tui-layout.c (layout_completer): Adjust to work with a
	completion_tracker.
	* tui/tui-regs.c (tui_reggroup_completer):
	* tui/tui-win.c (window_name_completer, focus_completer)
	(winheight_completer): Adjust to work with a completion_tracker.
	* value.c: Include "completer.h".
	(complete_internalvar): Adjust to work with a completion_tracker.
	* value.h (complete_internalvar): Likewise.
This commit is contained in:
Pedro Alves 2017-07-17 14:45:59 +01:00
parent 6e1dbf8cda
commit eb3ff9a551
36 changed files with 1256 additions and 846 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

182
gdb/ChangeLog
View File

@ -1,3 +1,185 @@
2017-07-17 Pedro Alves <palves@redhat.com>
* ada-lang.c (symbol_completion_match): Adjust comments.
(symbol_completion_add): Replace vector parameter with
completion_tracker parameter. Use it.
(ada_make_symbol_completion_list): Rename to...
(ada_collect_symbol_completion_matches): ... this. Add
completion_tracker parameter and use it.
(ada_language_defn): Adjust.
* break-catch-syscall.c (catch_syscall_completer): Adjust
prototype and work with completion_tracker instead of VEC.
* breakpoint.c (condition_completer): Adjust prototype and work
with completion_tracker instead of VEC.
* c-lang.c (c_language_defn, cplus_language_defn)
(asm_language_defn, minimal_language_defn): Adjust to renames.
* cli/cli-cmds.c (complete_command): Rework using
completion_tracker. Catch exceptions when completing.
* cli/cli-decode.c (integer_unlimited_completer)
(complete_on_cmdlist, complete_on_enum): Adjust prototype and work
with completion_tracker instead of VEC.
* command.h (struct completion_tracker): Forward declare.
(completer_ftype, completer_handle_brkchars_ftype): Change
types.
(complete_on_cmdlist, complete_on_enum): Adjust.
* completer.c: Include <algorithm>.
(struct gdb_completer_state): New.
(current_completion): New global.
(readline_line_completion_function): Delete.
(noop_completer, filename_completer)
(filename_completer_handle_brkchars, complete_files_symbols)
(linespec_location_completer): Adjust to work with a
completion_tracker instead of a VEC.
(string_or_empty): New.
(collect_explicit_location_matches): Adjust to work with a
completion_tracker instead of a VEC.
(explicit_location_completer): Rename to ...
(complete_explicit_location): ... this and adjust to work with a
completion_tracker instead of a VEC.
(location_completer): Adjust to work with a completion_tracker
instead of a VEC.
(add_struct_fields): Adjust to work with a completion_list instead
of VEC.
(expression_completer): Rename to ...
(complete_expression): ... this and adjust to work with a
completion_tracker instead of a VEC. Use complete_files_symbols.
(expression_completer): Reimplement on top of complete_expression.
(symbol_completer): Adjust to work with a completion_tracker
instead of a VEC.
(enum complete_line_internal_reason): Add describing comments.
(complete_line_internal_normal_command): Adjust to work with a
completion_tracker instead of a VEC.
(complete_line_internal): Rename to ...
(complete_line_internal_1): ... this and adjust to work with a
completion_tracker instead of a VEC. Assert TEXT is NULL in the
handle_brkchars phase.
(new_completion_tracker): Delete.
(complete_line_internal): Reimplement as TRY/CATCH wrapper around
complete_line_internal_1.
(free_completion_tracker): Delete.
(INITIAL_COMPLETION_HTAB_SIZE): New.
(completion_tracker::completion_tracker)
(completion_tracker::~completion_tracker): New.
(maybe_add_completion): Delete.
(completion_tracker::maybe_add_completion)
(completion_tracker::add_completion)
(completion_tracker::add_completions): New.
(throw_max_completions_reached_error): Delete.
(complete_line): Adjust to work with a completion_tracker instead
of a VEC. Don't create a completion_tracker_t or check for max
completions here.
(command_completer, command_completer_handle_brkchars)
(signal_completer, reg_or_group_completer_1)
(reg_or_group_completer, default_completer_handle_brkchars):
Adjust to work with a completion_tracker.
(gdb_completion_word_break_characters_throw): New.
(gdb_completion_word_break_characters): Reimplement.
(line_completion_function): Delete.
(completion_tracker::recompute_lowest_common_denominator)
(expand_preserving_ws)
(completion_tracker::build_completion_result)
(completion_result::completion_result)
(completion_result::completion_result)
(completion_result::~completion_result)
(completion_result::completion_result)
(completion_result::release_match_list, compare_cstrings)
(completion_result::sort_match_list)
(completion_result::reset_match_list)
(gdb_rl_attempted_completion_function_throw)
(gdb_rl_attempted_completion_function): New.
* completer.h (completion_list, struct completion_result)
(class completion_tracker): New.
(complete_line): Add completion_tracker parameter.
(readline_line_completion_function): Delete.
(gdb_rl_attempted_completion_function): New.
(noop_completer, filename_completer, expression_completer)
(location_completer, symbol_completer, command_completer)
(signal_completer, reg_or_group_completer): Update prototypes.
(completion_tracker_t, new_completion_tracker)
(make_cleanup_free_completion_tracker): Delete.
(enum maybe_add_completion_enum): Delete.
(maybe_add_completion): Delete.
(throw_max_completions_reached_error): Delete.
* corefile.c (complete_set_gnutarget): Adjust to work with a
completion_tracker instead of a VEC.
* cp-abi.c (cp_abi_completer): Adjust to work with a
completion_tracker instead of a VEC.
* d-lang.c (d_language_defn): Adjust.
* disasm.c (disassembler_options_completer): Adjust to work with a
completion_tracker instead of a VEC.
* f-lang.c (f_make_symbol_completion_list): Rename to ...
(f_collect_symbol_completion_matches): ... this. Adjust to work
with a completion_tracker instead of a VEC.
(f_language_defn): Adjust.
* go-lang.c (go_language_defn): Adjust.
* guile/scm-cmd.c (cmdscm_add_completion, cmdscm_completer):
Adjust to work with a completion_tracker instead of a VEC.
* infrun.c (handle_completer): Likewise.
* interps.c (interpreter_completer): Likewise.
* interps.h (interpreter_completer): Likewise.
* language.c (unknown_language_defn, auto_language_defn)
(local_language_defn): Adjust.
* language.h (language_defn::la_make_symbol_completion_list):
Rename to ...
(language_defn::la_collect_symbol_completion_matches): ... this
and adjust to work with a completion_tracker instead of a VEC.
* m2-lang.c (m2_language_defn): Adjust.
* objc-lang.c (objc_language_defn): Adjust.
* opencl-lang.c (opencl_language_defn): Adjust.
* p-lang.c (pascal_language_defn): Adjust.
* python/py-cmd.c (cmdpy_completer_helper): Handle NULL word.
(cmdpy_completer_handle_brkchars, cmdpy_completer): Adjust to work
with a completion_tracker.
* rust-lang.c (rust_language_defn): Adjust.
* symtab.c (free_completion_list, do_free_completion_list)
(return_val, completion_tracker): Delete.
(completion_list_add_name, completion_list_add_symbol)
(completion_list_add_msymbol, completion_list_objc_symbol)
(completion_list_add_fields, add_symtab_completions): Add
completion_tracker parameter and use it.
(default_make_symbol_completion_list_break_on_1): Rename to...
(default_collect_symbol_completion_matches_break_on): ... this.
Add completion_tracker parameter and use it instead of allocating
a completion tracker here.
(default_make_symbol_completion_list_break_on): Delete old
implementation.
(default_make_symbol_completion_list): Delete.
(default_collect_symbol_completion_matches): New.
(make_symbol_completion_list): Delete.
(collect_symbol_completion_matches): New.
(make_symbol_completion_type): Rename to ...
(collect_symbol_completion_matches_type): ... this. Add
completion_tracker parameter and use it instead of VEC.
(make_file_symbol_completion_list_1): Rename to...
(collect_file_symbol_completion_matches): ... this. Add
completion_tracker parameter and use it instead of VEC.
(make_file_symbol_completion_list): Delete.
(add_filename_to_list): Use completion_list instead of a VEC.
(add_partial_filename_data::list): Now a completion_list.
(make_source_files_completion_list): Work with a completion_list
instead of a VEC.
* symtab.h: Include "completer.h".
(default_make_symbol_completion_list_break_on)
(default_make_symbol_completion_list, make_symbol_completion_list)
(make_symbol_completion_type, make_file_symbol_completion_list)
(make_source_files_completion_list): Delete.
(default_collect_symbol_completion_matches_break_on)
(default_collect_symbol_completion_matches)
(collect_symbol_completion_matches)
(collect_symbol_completion_matches_type)
(collect_file_symbol_completion_matches)
(make_source_files_completion_list): New.
* top.c (init_main): Don't install a rl_completion_entry_function
hook. Install a rl_attempted_completion_function hook instead.
* tui/tui-layout.c (layout_completer): Adjust to work with a
completion_tracker.
* tui/tui-regs.c (tui_reggroup_completer):
* tui/tui-win.c (window_name_completer, focus_completer)
(winheight_completer): Adjust to work with a completion_tracker.
* value.c: Include "completer.h".
(complete_internalvar): Adjust to work with a completion_tracker.
* value.h (complete_internalvar): Likewise.
2017-07-17 Pedro Alves <palves@redhat.com>
* cli/cli-decode.c (set_cmd_completer_handle_brkchars): Adjust to

35
gdb/ada-lang.c
View File

@ -6440,10 +6440,10 @@ symbol_completion_match (const char *sym_name,
return sym_name;
}
/* A companion function to ada_make_symbol_completion_list().
/* A companion function to ada_collect_symbol_completion_matches().
Check if SYM_NAME represents a symbol which name would be suitable
to complete TEXT (TEXT_LEN is the length of TEXT), in which case
it is appended at the end of the given string vector SV.
to complete TEXT (TEXT_LEN is the length of TEXT), in which case it
is added as a completion match to TRACKER.
ORIG_TEXT is the string original string from the user command
that needs to be completed. WORD is the entire command on which
@ -6456,8 +6456,8 @@ symbol_completion_match (const char *sym_name,
encoded). */
static void
symbol_completion_add (VEC(char_ptr) **sv,
const char *sym_name,
symbol_completion_add (completion_tracker &tracker,
const char *sym_name,
const char *text, int text_len,
const char *orig_text, const char *word,
int wild_match_p, int encoded_p)
@ -6492,21 +6492,21 @@ symbol_completion_add (VEC(char_ptr) **sv,
strcat (completion, match);
}
VEC_safe_push (char_ptr, *sv, completion);
tracker.add_completion (gdb::unique_xmalloc_ptr<char> (completion));
}
/* Return a list of possible symbol names completing TEXT0. WORD is
the entire command on which completion is made. */
/* Add the list of possible symbol names completing TEXT0 to TRACKER.
WORD is the entire command on which completion is made. */
static VEC (char_ptr) *
ada_make_symbol_completion_list (const char *text0, const char *word,
enum type_code code)
static void
ada_collect_symbol_completion_matches (completion_tracker &tracker,
const char *text0, const char *word,
enum type_code code)
{
char *text;
int text_len;
int wild_match_p;
int encoded_p;
VEC(char_ptr) *completions = VEC_alloc (char_ptr, 128);
struct symbol *sym;
struct compunit_symtab *s;
struct minimal_symbol *msymbol;
@ -6562,7 +6562,7 @@ ada_make_symbol_completion_list (const char *text0, const char *word,
ALL_MSYMBOLS (objfile, msymbol)
{
QUIT;
symbol_completion_add (&completions, MSYMBOL_LINKAGE_NAME (msymbol),
symbol_completion_add (tracker, MSYMBOL_LINKAGE_NAME (msymbol),
text, text_len, text0, word, wild_match_p,
encoded_p);
}
@ -6577,7 +6577,7 @@ ada_make_symbol_completion_list (const char *text0, const char *word,
ALL_BLOCK_SYMBOLS (b, iter, sym)
{
symbol_completion_add (&completions, SYMBOL_LINKAGE_NAME (sym),
symbol_completion_add (tracker, SYMBOL_LINKAGE_NAME (sym),
text, text_len, text0, word,
wild_match_p, encoded_p);
}
@ -6592,7 +6592,7 @@ ada_make_symbol_completion_list (const char *text0, const char *word,
b = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (s), GLOBAL_BLOCK);
ALL_BLOCK_SYMBOLS (b, iter, sym)
{
symbol_completion_add (&completions, SYMBOL_LINKAGE_NAME (sym),
symbol_completion_add (tracker, SYMBOL_LINKAGE_NAME (sym),
text, text_len, text0, word,
wild_match_p, encoded_p);
}
@ -6607,14 +6607,13 @@ ada_make_symbol_completion_list (const char *text0, const char *word,
continue;
ALL_BLOCK_SYMBOLS (b, iter, sym)
{
symbol_completion_add (&completions, SYMBOL_LINKAGE_NAME (sym),
symbol_completion_add (tracker, SYMBOL_LINKAGE_NAME (sym),
text, text_len, text0, word,
wild_match_p, encoded_p);
}
}
do_cleanups (old_chain);
return completions;
}
/* Field Access */
@ -14010,7 +14009,7 @@ const struct language_defn ada_language_defn = {
0, /* c-style arrays */
1, /* String lower bound */
ada_get_gdb_completer_word_break_characters,
ada_make_symbol_completion_list,
ada_collect_symbol_completion_matches,
ada_language_arch_info,
ada_print_array_index,
default_pass_by_reference,

25
gdb/break-catch-syscall.c
View File

@ -612,15 +612,14 @@ catching_syscall_number (int syscall_number)
}
/* Complete syscall names. Used by "catch syscall". */
static VEC (char_ptr) *
static void
catch_syscall_completer (struct cmd_list_element *cmd,
completion_tracker &tracker,
const char *text, const char *word)
{
struct gdbarch *gdbarch = get_current_arch ();
struct cleanup *cleanups = make_cleanup (null_cleanup, NULL);
VEC (char_ptr) *group_retlist = NULL;
VEC (char_ptr) *syscall_retlist = NULL;
VEC (char_ptr) *retlist = NULL;
const char **group_list = NULL;
const char **syscall_list = NULL;
const char *prefix;
@ -636,8 +635,8 @@ catch_syscall_completer (struct cmd_list_element *cmd,
{
/* Perform completion inside 'group:' namespace only. */
group_list = get_syscall_group_names (gdbarch);
retlist = (group_list == NULL
? NULL : complete_on_enum (group_list, word, word));
if (group_list != NULL)
complete_on_enum (tracker, group_list, word, word);
}
else
{
@ -654,21 +653,15 @@ catch_syscall_completer (struct cmd_list_element *cmd,
make_cleanup (xfree, prefixed_group);
}
syscall_retlist = ((syscall_list == NULL)
? NULL : complete_on_enum (syscall_list, word, word));
group_retlist = ((group_list == NULL)
? NULL : complete_on_enum (group_list, word, word));
retlist = VEC_merge (char_ptr, syscall_retlist, group_retlist);
if (syscall_list != NULL)
complete_on_enum (tracker, syscall_list, word, word);
if (group_list != NULL)
complete_on_enum (tracker, group_list, word, word);
}
VEC_free (char_ptr, syscall_retlist);
VEC_free (char_ptr, group_retlist);
xfree (syscall_list);
xfree (group_list);
do_cleanups (cleanups);
return retlist;
}
static void

18
gdb/breakpoint.c
View File

@ -1042,8 +1042,9 @@ set_breakpoint_condition (struct breakpoint *b, const char *exp,
/* Completion for the "condition" command. */
static VEC (char_ptr) *
static void
condition_completer (struct cmd_list_element *cmd,
completion_tracker &tracker,
const char *text, const char *word)
{
const char *space;
@ -1059,9 +1060,9 @@ condition_completer (struct cmd_list_element *cmd,
if (text[0] == '$')
{
/* We don't support completion of history indices. */
if (isdigit (text[1]))
return NULL;
return complete_internalvar (&text[1]);
if (!isdigit (text[1]))
complete_internalvar (tracker, &text[1]);
return;
}
/* We're completing the breakpoint number. */
@ -1074,15 +1075,18 @@ condition_completer (struct cmd_list_element *cmd,
xsnprintf (number, sizeof (number), "%d", b->number);
if (strncmp (number, text, len) == 0)
VEC_safe_push (char_ptr, result, xstrdup (number));
{
gdb::unique_xmalloc_ptr<char> copy (xstrdup (number));
tracker.add_completion (std::move (copy));
}
}
return result;
return;
}
/* We're completing the expression part. */
text = skip_spaces_const (space);
return expression_completer (cmd, text, word);
expression_completer (cmd, tracker, text, word);
}
/* condition N EXP -- set break condition of breakpoint N to EXP. */

8
gdb/c-lang.c
View File

@ -865,7 +865,7 @@ const struct language_defn c_language_defn =
1, /* c-style arrays */
0, /* String lower bound */
default_word_break_characters,
default_make_symbol_completion_list,
default_collect_symbol_completion_matches,
c_language_arch_info,
default_print_array_index,
default_pass_by_reference,
@ -1009,7 +1009,7 @@ const struct language_defn cplus_language_defn =
1, /* c-style arrays */
0, /* String lower bound */
default_word_break_characters,
default_make_symbol_completion_list,
default_collect_symbol_completion_matches,
cplus_language_arch_info,
default_print_array_index,
cp_pass_by_reference,
@ -1062,7 +1062,7 @@ const struct language_defn asm_language_defn =
1, /* c-style arrays */
0, /* String lower bound */
default_word_break_characters,
default_make_symbol_completion_list,
default_collect_symbol_completion_matches,
c_language_arch_info, /* FIXME: la_language_arch_info. */
default_print_array_index,
default_pass_by_reference,
@ -1115,7 +1115,7 @@ const struct language_defn minimal_language_defn =
1, /* c-style arrays */
0, /* String lower bound */
default_word_break_characters,
default_make_symbol_completion_list,
default_collect_symbol_completion_matches,
c_language_arch_info,
default_print_array_index,
default_pass_by_reference,

54
gdb/cli/cli-cmds.c
View File

@ -238,6 +238,7 @@ help_command (char *command, int from_tty)
help_cmd (command, gdb_stdout);
}
/* Note: The "complete" command is used by Emacs to implement completion.
[Is that why this function writes output with *_unfiltered?] */
@ -246,8 +247,6 @@ complete_command (char *arg_entry, int from_tty)
{
const char *arg = arg_entry;
int argpoint;
char *arg_prefix;
VEC (char_ptr) *completions;
dont_repeat ();
@ -279,43 +278,46 @@ complete_command (char *arg_entry, int from_tty)
point--;
}
arg_prefix = (char *) alloca (point - arg + 1);
memcpy (arg_prefix, arg, point - arg);
arg_prefix[point - arg] = 0;
completion_tracker tracker_handle_completions;
completions = complete_line (point, arg, argpoint);
if (completions)
TRY
{
int ix, size = VEC_length (char_ptr, completions);
char *item, *prev = NULL;
complete_line (tracker_handle_completions, point, arg, strlen (arg));
}
CATCH (ex, RETURN_MASK_ALL)
{
return;
}
qsort (VEC_address (char_ptr, completions), size,
sizeof (char *), compare_strings);
std::string arg_prefix (arg, point - arg);
/* We do extra processing here since we only want to print each
unique item once. */
for (ix = 0; VEC_iterate (char_ptr, completions, ix, item); ++ix)
completion_result result
= (tracker_handle_completions.build_completion_result
(point, point - arg, strlen (arg)));
if (result.number_matches != 0)
{
if (result.number_matches == 1)
printf_unfiltered ("%s%s\n", arg_prefix.c_str (), result.match_list[0]);
else
{
if (prev == NULL || strcmp (item, prev) != 0)
result.sort_match_list ();
for (size_t i = 0; i < result.number_matches; i++)
{
printf_unfiltered ("%s%s\n", arg_prefix, item);
xfree (prev);
prev = item;
printf_unfiltered ("%s%s",
arg_prefix.c_str (),
result.match_list[i + 1]);
printf_unfiltered ("\n");
}
else
xfree (item);
}
xfree (prev);
VEC_free (char_ptr, completions);
if (size == max_completions)
if (result.number_matches == max_completions)
{
/* ARG_PREFIX and POINT are included in the output so that emacs
will include the message in the output. */
printf_unfiltered (_("%s%s %s\n"),
arg_prefix, point,
arg_prefix.c_str (), point,
get_max_completions_reached_message ());
}
}

35
gdb/cli/cli-decode.c
View File

@ -657,8 +657,9 @@ add_setshow_optional_filename_cmd (const char *name, enum command_class theclass
/* Completes on literal "unlimited". Used by integer commands that
support a special "unlimited" value. */
static VEC (char_ptr) *
static void
integer_unlimited_completer (struct cmd_list_element *ignore,
completion_tracker &tracker,
const char *text, const char *word)
{
static const char * const keywords[] =
@ -667,7 +668,7 @@ integer_unlimited_completer (struct cmd_list_element *ignore,
NULL,
};
return complete_on_enum (keywords, text, word);
complete_on_enum (tracker, keywords, text, word);
}
/* Add element named NAME to both the set and show command LISTs (the
@ -1771,13 +1772,13 @@ lookup_cmd_composition (const char *text,
"foo" and we want to complete to "foobar". If WORD is "oo", return
"oobar"; if WORD is "baz/foo", return "baz/foobar". */
VEC (char_ptr) *
void
complete_on_cmdlist (struct cmd_list_element *list,
completion_tracker &tracker,
const char *text, const char *word,
int ignore_help_classes)
{
struct cmd_list_element *ptr;
VEC (char_ptr) *matchlist = NULL;
int textlen = strlen (text);
int pass;
int saw_deprecated_match = 0;
@ -1786,8 +1787,10 @@ complete_on_cmdlist (struct cmd_list_element *list,
commands. If we see no matching commands in the first pass, and
if we did happen to see a matching deprecated command, we do
another loop to collect those. */
for (pass = 0; matchlist == 0 && pass < 2; ++pass)
for (pass = 0; pass < 2; ++pass)
{
bool got_matches = false;
for (ptr = list; ptr; ptr = ptr->next)
if (!strncmp (ptr->name, text, textlen)
&& !ptr->abbrev_flag
@ -1820,32 +1823,34 @@ complete_on_cmdlist (struct cmd_list_element *list,
match[text - word] = '\0';
strcat (match, ptr->name);
}
VEC_safe_push (char_ptr, matchlist, match);
tracker.add_completion (gdb::unique_xmalloc_ptr<char> (match));
got_matches = true;
}
if (got_matches)
break;
/* If we saw no matching deprecated commands in the first pass,
just bail out. */
if (!saw_deprecated_match)
break;
}
return matchlist;
}
/* Helper function for SYMBOL_COMPLETION_FUNCTION. */
/* Return a vector of char pointers which point to the different
possible completions in CMD of TEXT.
/* Add the different possible completions in ENUMLIST of TEXT.
WORD points in the same buffer as TEXT, and completions should be
returned relative to this position. For example, suppose TEXT is "foo"
and we want to complete to "foobar". If WORD is "oo", return
"oobar"; if WORD is "baz/foo", return "baz/foobar". */
VEC (char_ptr) *
complete_on_enum (const char *const *enumlist,
void
complete_on_enum (completion_tracker &tracker,
const char *const *enumlist,
const char *text, const char *word)
{
VEC (char_ptr) *matchlist = NULL;
int textlen = strlen (text);
int i;
const char *name;
@ -1870,10 +1875,8 @@ complete_on_enum (const char *const *enumlist,
match[text - word] = '\0';
strcat (match, name);
}
VEC_safe_push (char_ptr, matchlist, match);
tracker.add_completion (gdb::unique_xmalloc_ptr<char> (match));
}
return matchlist;
}

20
gdb/command.h
View File

@ -21,6 +21,8 @@
#include "gdb_vecs.h"
#include "common/scoped_restore.h"
struct completion_tracker;
/* This file defines the public interface for any code wanting to
create commands. */
@ -174,7 +176,7 @@ typedef void cmd_sfunc_ftype (char *args, int from_tty,
extern void set_cmd_sfunc (struct cmd_list_element *cmd,
cmd_sfunc_ftype *sfunc);
/* A completion routine. Return a list of possible completions.
/* A completion routine. Add possible completions to tracker.
TEXT is the text beyond what was matched for the command itself
(leading whitespace is skipped). It stops where we are supposed to
@ -183,11 +185,13 @@ extern void set_cmd_sfunc (struct cmd_list_element *cmd,
relative to this position. For example, suppose TEXT is "foo" and
we want to complete to "foobar". If WORD is "oo", return "oobar";
if WORD is "baz/foo", return "baz/foobar". */
typedef VEC (char_ptr) *completer_ftype (struct cmd_list_element *,
const char *text, const char *word);
typedef void completer_ftype (struct cmd_list_element *,
completion_tracker &tracker,
const char *text, const char *word);
/* Same, but for set_cmd_completer_handle_brkchars. */
typedef void completer_handle_brkchars_ftype (struct cmd_list_element *,
completion_tracker &tracker,
const char *text, const char *word);
extern void set_cmd_completer (struct cmd_list_element *, completer_ftype *);
@ -259,11 +263,13 @@ extern struct cmd_list_element *add_info (const char *,
extern struct cmd_list_element *add_info_alias (const char *, const char *,
int);
extern VEC (char_ptr) *complete_on_cmdlist (struct cmd_list_element *,
const char *, const char *, int);
extern void complete_on_cmdlist (struct cmd_list_element *,
completion_tracker &tracker,
const char *, const char *, int);
extern VEC (char_ptr) *complete_on_enum (const char *const *enumlist,
const char *, const char *);
extern void complete_on_enum (completion_tracker &tracker,
const char *const *enumlist,
const char *, const char *);
/* Functions that implement commands about CLI commands. */

937
gdb/completer.c
View File

File diff suppressed because it is too large Load Diff

244
gdb/completer.h
View File

@ -63,44 +63,184 @@ struct match_list_displayer
mld_read_key_ftype *read_key;
};
/* A list of completion candidates. Each element is a malloc string,
because ownership of the strings is transferred to readline, which
calls free on each element. */
typedef std::vector<gdb::unique_xmalloc_ptr<char>> completion_list;
/* The final result of a completion that is handed over to either
readline or the "completion" command (which pretends to be
readline). Mainly a wrapper for a readline-style match list array,
though other bits of info are included too. */
struct completion_result
{
/* Create an empty result. */
completion_result ();
/* Create a result. */
completion_result (char **match_list, size_t number_matches,
bool completion_suppress_append);
/* Destroy a result. */
~completion_result ();
/* Disable copying, since we don't need it. */
completion_result (const completion_result &rhs) = delete;
void operator= (const completion_result &rhs) = delete;
/* Move a result. */
completion_result (completion_result &&rhs);
/* Release ownership of the match list array. */
char **release_match_list ();
/* Sort the match list. */
void sort_match_list ();
private:
/* Destroy the match list array and its contents. */
void reset_match_list ();
public:
/* (There's no point in making these fields private, since the whole
point of this wrapper is to build data in the layout expected by
readline. Making them private would require adding getters for
the "complete" command, which would expose the same
implementation details anyway.) */
/* The match list array, in the format that readline expects.
match_list[0] contains the common prefix. The real match list
starts at index 1. The list is NULL terminated. If there's only
one match, then match_list[1] is NULL. If there are no matches,
then this is NULL. */
char **match_list;
/* The number of matched completions in MATCH_LIST. Does not
include the NULL terminator or the common prefix. */
size_t number_matches;
/* Whether readline should suppress appending a whitespace, when
there's only one possible completion. */
bool completion_suppress_append;
};
/* Object used by completers to build a completion match list to hand
over to readline. It tracks:
- How many unique completions have been generated, to terminate
completion list generation early if the list has grown to a size
so large as to be useless. This helps avoid GDB seeming to lock
up in the event the user requests to complete on something vague
that necessitates the time consuming expansion of many symbol
tables.
*/
class completion_tracker
{
public:
completion_tracker ();
~completion_tracker ();
/* Disable copy. */
completion_tracker (const completion_tracker &rhs) = delete;
void operator= (const completion_tracker &rhs) = delete;
/* Add the completion NAME to the list of generated completions if
it is not there already. If too many completions were already
found, this throws an error. */
void add_completion (gdb::unique_xmalloc_ptr<char> name);
/* Add all completions matches in LIST. Elements are moved out of
LIST. */
void add_completions (completion_list &&list);
/* True if we have any completion match recorded. */
bool have_completions () const
{ return !m_entries_vec.empty (); }
/* Build a completion_result containing the list of completion
matches to hand over to readline. The parameters are as in
rl_attempted_completion_function. */
completion_result build_completion_result (const char *text,
int start, int end);
private:
/* Add the completion NAME to the list of generated completions if
it is not there already. If false is returned, too many
completions were found. */
bool maybe_add_completion (gdb::unique_xmalloc_ptr<char> name);
/* Given a new match, recompute the lowest common denominator (LCD)
to hand over to readline. */
void recompute_lowest_common_denominator (const char *new_match);
/* The completion matches found so far, in a vector. */
completion_list m_entries_vec;
/* The completion matches found so far, in a hash table, for
duplicate elimination as entries are added. Otherwise the user
is left scratching his/her head: readline and complete_command
will remove duplicates, and if removal of duplicates there brings
the total under max_completions the user may think gdb quit
searching too early. */
htab_t m_entries_hash;
/* Our idea of lowest common denominator to hand over to readline. */
char *m_lowest_common_denominator = NULL;
/* If true, the LCD is unique. I.e., all completion candidates had
the same string. */
bool m_lowest_common_denominator_unique = false;
};
extern void gdb_display_match_list (char **matches, int len, int max,
const struct match_list_displayer *);
extern const char *get_max_completions_reached_message (void);
extern VEC (char_ptr) *complete_line (const char *text,
const char *line_buffer,
int point);
extern void complete_line (completion_tracker &tracker,
const char *text,
const char *line_buffer,
int point);
extern char *readline_line_completion_function (const char *text,
int matches);
extern char **gdb_rl_attempted_completion_function (const char *text,
int start, int end);
extern VEC (char_ptr) *noop_completer (struct cmd_list_element *,
const char *, const char *);
extern void noop_completer (struct cmd_list_element *,
completion_tracker &tracker,
const char *, const char *);
extern VEC (char_ptr) *filename_completer (struct cmd_list_element *,
const char *, const char *);
extern void filename_completer (struct cmd_list_element *,
completion_tracker &tracker,
const char *, const char *);
extern VEC (char_ptr) *expression_completer (struct cmd_list_element *,
const char *, const char *);
extern void expression_completer (struct cmd_list_element *,
completion_tracker &tracker,
const char *, const char *);
extern VEC (char_ptr) *location_completer (struct cmd_list_element *,
const char *, const char *);
extern void location_completer (struct cmd_list_element *,
completion_tracker &tracker,
const char *, const char *);
extern VEC (char_ptr) *symbol_completer (struct cmd_list_element *,
const char *, const char *);
extern void symbol_completer (struct cmd_list_element *,
completion_tracker &tracker,
const char *, const char *);
extern VEC (char_ptr) *command_completer (struct cmd_list_element *,
const char *, const char *);
extern void command_completer (struct cmd_list_element *,
completion_tracker &tracker,
const char *, const char *);
extern VEC (char_ptr) *signal_completer (struct cmd_list_element *,
const char *, const char *);
extern void signal_completer (struct cmd_list_element *,
completion_tracker &tracker,
const char *, const char *);
extern VEC (char_ptr) *reg_or_group_completer (struct cmd_list_element *,
const char *, const char *);
extern void reg_or_group_completer (struct cmd_list_element *,
completion_tracker &tracker,
const char *, const char *);
extern VEC (char_ptr) *reggroup_completer (struct cmd_list_element *,
const char *, const char *);
extern void reggroup_completer (struct cmd_list_element *,
completion_tracker &tracker,
const char *, const char *);
extern const char *get_gdb_completer_quote_characters (void);
@ -134,62 +274,4 @@ extern const char *skip_quoted (const char *);
extern int max_completions;
/* Object to track how many unique completions have been generated.
Used to limit the size of generated completion lists. */
typedef htab_t completion_tracker_t;
/* Create a new completion tracker.
The result is a hash table to track added completions, or NULL
if max_completions <= 0. If max_completions < 0, tracking is disabled.
If max_completions == 0, the max is indeed zero. */
extern completion_tracker_t new_completion_tracker (void);
/* Make a cleanup to free a completion tracker, and reset its pointer
to NULL. */
extern struct cleanup *make_cleanup_free_completion_tracker
(completion_tracker_t *tracker_ptr);
/* Return values for maybe_add_completion. */
enum maybe_add_completion_enum
{
/* NAME has been recorded and max_completions has not been reached,
or completion tracking is disabled (max_completions < 0). */
MAYBE_ADD_COMPLETION_OK,
/* NAME has been recorded and max_completions has been reached
(thus the caller can stop searching). */
MAYBE_ADD_COMPLETION_OK_MAX_REACHED,
/* max-completions entries has been reached.
Whether NAME is a duplicate or not is not determined. */
MAYBE_ADD_COMPLETION_MAX_REACHED,
/* NAME has already been recorded.
Note that this is never returned if completion tracking is disabled
(max_completions < 0). */
MAYBE_ADD_COMPLETION_DUPLICATE
};
/* Add the completion NAME to the list of generated completions if
it is not there already.
If max_completions is negative, nothing is done, not even watching
for duplicates, and MAYBE_ADD_COMPLETION_OK is always returned.
If MAYBE_ADD_COMPLETION_MAX_REACHED is returned, callers are required to
record at least one more completion. The final list will be pruned to
max_completions, but recording at least one more than max_completions is
the signal to the completion machinery that too many completions were
found. */
extern enum maybe_add_completion_enum
maybe_add_completion (completion_tracker_t tracker, char *name);
/* Wrapper to throw MAX_COMPLETIONS_REACHED_ERROR. */
extern void throw_max_completions_reached_error (void);
#endif /* defined (COMPLETER_H) */

5
gdb/corefile.c
View File

@ -483,8 +483,9 @@ set_gnutarget_command (char *ignore, int from_tty,
/* A completion function for "set gnutarget". */
static VEC (char_ptr) *
static void
complete_set_gnutarget (struct cmd_list_element *cmd,
completion_tracker &tracker,
const char *text, const char *word)
{
static const char **bfd_targets;
@ -502,7 +503,7 @@ complete_set_gnutarget (struct cmd_list_element *cmd,
bfd_targets[last + 1] = NULL;
}
return complete_on_enum (bfd_targets, text, word);
complete_on_enum (tracker, bfd_targets, text, word);
}
/* Set the gnutarget. */

5
gdb/cp-abi.c
View File

@ -355,8 +355,9 @@ set_cp_abi_cmd (char *args, int from_tty)
/* A completion function for "set cp-abi". */
static VEC (char_ptr) *
static void
cp_abi_completer (struct cmd_list_element *ignore,
completion_tracker &tracker,
const char *text, const char *word)
{
static const char **cp_abi_names;
@ -371,7 +372,7 @@ cp_abi_completer (struct cmd_list_element *ignore,
cp_abi_names[i] = NULL;
}
return complete_on_enum (cp_abi_names, text, word);
complete_on_enum (tracker, cp_abi_names, text, word);
}
/* Show the currently selected C++ ABI. */

2
gdb/d-lang.c
View File

@ -239,7 +239,7 @@ static const struct language_defn d_language_defn =
1, /* C-style arrays. */
0, /* String lower bound. */
default_word_break_characters,
default_make_symbol_completion_list,
default_collect_symbol_completion_matches,
d_language_arch_info,
default_print_array_index,
default_pass_by_reference,

6
gdb/disasm.c
View File

@ -1030,8 +1030,9 @@ The following disassembler options are supported for use with the\n\
/* A completion function for "set disassembler". */
static VEC (char_ptr) *
static void
disassembler_options_completer (struct cmd_list_element *ignore,
completion_tracker &tracker,
const char *text, const char *word)
{
struct gdbarch *gdbarch = get_current_arch ();
@ -1044,9 +1045,8 @@ disassembler_options_completer (struct cmd_list_element *ignore,
if (separator != NULL)
text = separator + 1;
text = skip_spaces_const (text);
return complete_on_enum (opts->name, text, word);
complete_on_enum (tracker, opts->name, text, word);
}
return NULL;
}

12
gdb/f-lang.c
View File

@ -228,11 +228,13 @@ f_word_break_characters (void)
/* Consider the modules separator :: as a valid symbol name character
class. */
static VEC (char_ptr) *
f_make_symbol_completion_list (const char *text, const char *word,
enum type_code code)
static void
f_collect_symbol_completion_matches (completion_tracker &tracker,
const char *text, const char *word,
enum type_code code)
{
return default_make_symbol_completion_list_break_on (text, word, ":", code);
default_collect_symbol_completion_matches_break_on (tracker,
text, word, ":", code);
}
static const char *f_extensions[] =
@ -282,7 +284,7 @@ const struct language_defn f_language_defn =
0, /* arrays are first-class (not c-style) */
1, /* String lower bound */
f_word_break_characters,
f_make_symbol_completion_list,
f_collect_symbol_completion_matches,
f_language_arch_info,
default_print_array_index,
default_pass_by_reference,

4
gdb/go-lang.c
View File

@ -600,13 +600,13 @@ static const struct language_defn go_language_defn =
1, /* C-style arrays. */
0, /* String lower bound. */
default_word_break_characters,
default_make_symbol_completion_list,
default_collect_symbol_completion_matches,
go_language_arch_info,
default_print_array_index,
default_pass_by_reference,
c_get_string,
c_watch_location_expression,
NULL,
NULL, /* la_get_symbol_name_cmp */
iterate_over_symbols,
&default_varobj_ops,
NULL,

38
gdb/guile/scm-cmd.c
View File

@ -350,9 +350,8 @@ cmdscm_bad_completion_result (const char *msg, SCM completion)
The result is a boolean indicating success. */
static int
cmdscm_add_completion (SCM completion, VEC (char_ptr) **result)
cmdscm_add_completion (SCM completion, completion_tracker &tracker)
{
char *item;
SCM except_scm;
if (!scm_is_string (completion))
@ -363,8 +362,9 @@ cmdscm_add_completion (SCM completion, VEC (char_ptr) **result)
return 0;
}
item = gdbscm_scm_to_string (completion, NULL, host_charset (), 1,
&except_scm);
gdb::unique_xmalloc_ptr<char> item
(gdbscm_scm_to_string (completion, NULL, host_charset (), 1,
&except_scm));
if (item == NULL)
{
/* Inform the user, but otherwise ignore the entire result. */
@ -372,21 +372,21 @@ cmdscm_add_completion (SCM completion, VEC (char_ptr) **result)
return 0;
}
VEC_safe_push (char_ptr, *result, item);
tracker.add_completion (std::move (item));
return 1;
}
/* Called by gdb for command completion. */
static VEC (char_ptr) *
static void
cmdscm_completer (struct cmd_list_element *command,
completion_tracker &tracker,
const char *text, const char *word)
{
command_smob *c_smob/*obj*/ = (command_smob *) get_cmd_context (command);
SCM completer_result_scm;
SCM text_scm, word_scm, result_scm;
VEC (char_ptr) *result = NULL;
gdb_assert (c_smob != NULL);
gdb_assert (gdbscm_is_procedure (c_smob->complete));
@ -408,7 +408,7 @@ cmdscm_completer (struct cmd_list_element *command,
{
/* Inform the user, but otherwise ignore. */
gdbscm_print_gdb_exception (SCM_BOOL_F, completer_result_scm);
goto done;
return;
}
if (gdbscm_is_true (scm_list_p (completer_result_scm)))
@ -419,11 +419,8 @@ cmdscm_completer (struct cmd_list_element *command,
{
SCM next = scm_car (list);
if (!cmdscm_add_completion (next, &result))
{
VEC_free (char_ptr, result);
goto done;
}
if (!cmdscm_add_completion (next, tracker))
break;
list = scm_cdr (list);
}
@ -437,17 +434,13 @@ cmdscm_completer (struct cmd_list_element *command,
{
if (gdbscm_is_exception (next))
{
/* Inform the user, but otherwise ignore the entire result. */
/* Inform the user. */
gdbscm_print_gdb_exception (SCM_BOOL_F, completer_result_scm);
VEC_free (char_ptr, result);
goto done;
break;
}
if (!cmdscm_add_completion (next, &result))
{
VEC_free (char_ptr, result);
goto done;
}
if (cmdscm_add_completion (next, tracker))
break;
next = itscm_safe_call_next_x (iter, NULL);
}
@ -458,9 +451,6 @@ cmdscm_completer (struct cmd_list_element *command,
cmdscm_bad_completion_result (_("Bad completer result: "),
completer_result_scm);
}
done:
return result;
}
/* Helper for gdbscm_make_command which locates the command list to use and

13
gdb/infrun.c
View File

@ -8691,11 +8691,11 @@ Are you sure you want to change it? "),
/* Complete the "handle" command. */
static VEC (char_ptr) *
static void
handle_completer (struct cmd_list_element *ignore,
completion_tracker &tracker,
const char *text, const char *word)
{
VEC (char_ptr) *vec_signals, *vec_keywords, *return_val;
static const char * const keywords[] =
{
"all",
@ -8710,13 +8710,8 @@ handle_completer (struct cmd_list_element *ignore,
NULL,
};
vec_signals = signal_completer (ignore, text, word);
vec_keywords = complete_on_enum (keywords, word, word);
return_val = VEC_merge (char_ptr, vec_signals, vec_keywords);
VEC_free (char_ptr, vec_signals);
VEC_free (char_ptr, vec_keywords);
return return_val;
signal_completer (ignore, tracker, text, word);
complete_on_enum (tracker, keywords, word, word);
}
enum gdb_signal

8
gdb/interps.c
View File

@ -452,13 +452,13 @@ interpreter_exec_cmd (char *args, int from_tty)
/* See interps.h. */
VEC (char_ptr) *
void
interpreter_completer (struct cmd_list_element *ignore,
completion_tracker &tracker,
const char *text, const char *word)
{
struct interp_factory *interp;
int textlen;
VEC (char_ptr) *matches = NULL;
int ix;
textlen = strlen (text);
@ -485,11 +485,9 @@ interpreter_completer (struct cmd_list_element *ignore,
match[text - word] = '\0';
strcat (match, interp->name);
}
VEC_safe_push (char_ptr, matches, match);
tracker.add_completion (gdb::unique_xmalloc_ptr<char> (match));
}
}
return matches;
}
struct interp *

7
gdb/interps.h
View File

@ -138,9 +138,10 @@ extern void interp_pre_command_loop (struct interp *interp);
/* List the possible interpreters which could complete the given
text. */
extern VEC (char_ptr) *interpreter_completer (struct cmd_list_element *ignore,
const char *text,
const char *word);
extern void interpreter_completer (struct cmd_list_element *ignore,
completion_tracker &tracker,
const char *text,
const char *word);
/* well-known interpreters */
#define INTERP_CONSOLE "console"

6
gdb/language.c
View File

@ -855,7 +855,7 @@ const struct language_defn unknown_language_defn =
1, /* c-style arrays */
0, /* String lower bound */
default_word_break_characters,
default_make_symbol_completion_list,
default_collect_symbol_completion_matches,
unknown_language_arch_info, /* la_language_arch_info. */
default_print_array_index,
default_pass_by_reference,
@ -905,7 +905,7 @@ const struct language_defn auto_language_defn =
1, /* c-style arrays */
0, /* String lower bound */
default_word_break_characters,
default_make_symbol_completion_list,
default_collect_symbol_completion_matches,
unknown_language_arch_info, /* la_language_arch_info. */
default_print_array_index,
default_pass_by_reference,
@ -953,7 +953,7 @@ const struct language_defn local_language_defn =
1, /* c-style arrays */
0, /* String lower bound */
default_word_break_characters,
default_make_symbol_completion_list,
default_collect_symbol_completion_matches,
unknown_language_arch_info, /* la_language_arch_info. */
default_print_array_index,
default_pass_by_reference,

12
gdb/language.h
View File

@ -134,7 +134,7 @@ struct language_arch_info
transformed for lookup. */
typedef int (*symbol_name_cmp_ftype) (const char *symbol_search_name,
const char *lookup_name);
const char *lookup_name);
/* Structure tying together assorted information about a language. */
@ -323,14 +323,16 @@ struct language_defn
/* The list of characters forming word boundaries. */
const char *(*la_word_break_characters) (void);
/* Should return a vector of all symbols which are possible
/* Add to the completion tracker all symbols which are possible
completions for TEXT. WORD is the entire command on which the
completion is being made. If CODE is TYPE_CODE_UNDEF, then all
symbols should be examined; otherwise, only STRUCT_DOMAIN
symbols whose type has a code of CODE should be matched. */
VEC (char_ptr) *(*la_make_symbol_completion_list) (const char *text,
const char *word,
enum type_code code);
void (*la_collect_symbol_completion_matches)
(completion_tracker &tracker,
const char *text,
const char *word,
enum type_code code);
/* The per-architecture (OS/ABI) language information. */
void (*la_language_arch_info) (struct gdbarch *,

2
gdb/m2-lang.c
View File

@ -388,7 +388,7 @@ const struct language_defn m2_language_defn =
0, /* arrays are first-class (not c-style) */
0, /* String lower bound */
default_word_break_characters,
default_make_symbol_completion_list,
default_collect_symbol_completion_matches,
m2_language_arch_info,
default_print_array_index,
default_pass_by_reference,

2
gdb/objc-lang.c
View File

@ -397,7 +397,7 @@ const struct language_defn objc_language_defn = {
1, /* C-style arrays */
0, /* String lower bound */
default_word_break_characters,
default_make_symbol_completion_list,
default_collect_symbol_completion_matches,
c_language_arch_info,
default_print_array_index,
default_pass_by_reference,

2
gdb/opencl-lang.c
View File

@ -1077,7 +1077,7 @@ const struct language_defn opencl_language_defn =
1, /* c-style arrays */
0, /* String lower bound */
default_word_break_characters,
default_make_symbol_completion_list,
default_collect_symbol_completion_matches,
opencl_language_arch_info,
default_print_array_index,
default_pass_by_reference,

2
gdb/p-lang.c
View File

@ -451,7 +451,7 @@ const struct language_defn pascal_language_defn =
1, /* c-style arrays */
0, /* String lower bound */
default_word_break_characters,
default_make_symbol_completion_list,
default_collect_symbol_completion_matches,
pascal_language_arch_info,
default_print_array_index,
default_pass_by_reference,

45
gdb/python/py-cmd.c
View File

@ -242,10 +242,21 @@ cmdpy_completer_helper (struct cmd_list_element *command,
NULL));
if (textobj == NULL)
error (_("Could not convert argument to Python string."));
gdbpy_ref<> wordobj (PyUnicode_Decode (word, strlen (word), host_charset (),
NULL));
if (wordobj == NULL)
error (_("Could not convert argument to Python string."));
gdbpy_ref<> wordobj;
if (word == NULL)
{
/* "brkchars" phase. */
wordobj.reset (Py_None);
Py_INCREF (Py_None);
}
else
{
wordobj.reset (PyUnicode_Decode (word, strlen (word), host_charset (),
NULL));
if (wordobj == NULL)
error (_("Could not convert argument to Python string."));
}
gdbpy_ref<> resultobj (PyObject_CallMethodObjArgs ((PyObject *) obj,
complete_cst,
@ -267,6 +278,7 @@ cmdpy_completer_helper (struct cmd_list_element *command,
static void
cmdpy_completer_handle_brkchars (struct cmd_list_element *command,
completion_tracker &tracker,
const char *text, const char *word)
{
gdbpy_enter enter_py (get_current_arch (), current_language);
@ -300,19 +312,18 @@ cmdpy_completer_handle_brkchars (struct cmd_list_element *command,
adjust the break characters accordingly. */
brkchars_fn = (completer_handle_brkchars_func_for_completer
(completers[value].completer));
brkchars_fn (command, text, word);
brkchars_fn (command, tracker, text, word);
}
}
}
/* Called by gdb for command completion. */
static VEC (char_ptr) *
static void
cmdpy_completer (struct cmd_list_element *command,
completion_tracker &tracker,
const char *text, const char *word)
{
VEC (char_ptr) *result = NULL;
gdbpy_enter enter_py (get_current_arch (), current_language);
/* Calling our helper to obtain the PyObject of the Python
@ -320,12 +331,10 @@ cmdpy_completer (struct cmd_list_element *command,
gdbpy_ref<> resultobj (cmdpy_completer_helper (command, text, word));
/* If the result object of calling the Python function is NULL, it
means that there was an error. In this case, just give up and
return NULL. */
means that there was an error. In this case, just give up. */
if (resultobj == NULL)
return NULL;
return;
result = NULL;
if (PyInt_Check (resultobj.get ()))
{
/* User code may also return one of the completion constants,
@ -338,15 +347,16 @@ cmdpy_completer (struct cmd_list_element *command,
PyErr_Clear ();
}
else if (value >= 0 && value < (long) N_COMPLETERS)
result = completers[value].completer (command, text, word);
completers[value].completer (command, tracker, text, word);
}
else
{
gdbpy_ref<> iter (PyObject_GetIter (resultobj.get ()));
if (iter == NULL)
return NULL;
return;
bool got_matches = false;
while (true)
{
gdbpy_ref<> elt (PyIter_Next (iter.get ()));
@ -366,16 +376,15 @@ cmdpy_completer (struct cmd_list_element *command,
PyErr_Clear ();
continue;
}
VEC_safe_push (char_ptr, result, item.release ());
tracker.add_completion (std::move (item));
got_matches = true;
}
/* If we got some results, ignore problems. Otherwise, report
the problem. */
if (result != NULL && PyErr_Occurred ())
if (got_matches && PyErr_Occurred ())
PyErr_Clear ();
}
return result;
}
/* Helper for cmdpy_init which locates the command list to use and

2
gdb/rust-lang.c
View File

@ -2184,7 +2184,7 @@ static const struct language_defn rust_language_defn =
1, /* c-style arrays */
0, /* String lower bound */
default_word_break_characters,
default_make_symbol_completion_list,
default_collect_symbol_completion_matches,
rust_language_arch_info,
default_print_array_index,
default_pass_by_reference,

274
gdb/symtab.c
View File

@ -4747,44 +4747,13 @@ compare_symbol_name (const char *name, const char *sym_text, int sym_text_len)
return 1;
}
/* Free any memory associated with a completion list. */
static void
free_completion_list (VEC (char_ptr) **list_ptr)
{
int i;
char *p;
for (i = 0; VEC_iterate (char_ptr, *list_ptr, i, p); ++i)
xfree (p);
VEC_free (char_ptr, *list_ptr);
}
/* Callback for make_cleanup. */
static void
do_free_completion_list (void *list)
{
free_completion_list ((VEC (char_ptr) **) list);
}
static VEC (char_ptr) *return_val;
/* Tracker for how many unique completions have been generated. Used
to terminate completion list generation early if the list has grown
to a size so large as to be useless. This helps avoid GDB seeming
to lock up in the event the user requests to complete on something
vague that necessitates the time consuming expansion of many symbol
tables. */
static completion_tracker_t completion_tracker;
/* Test to see if the symbol specified by SYMNAME (which is already
demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN
characters. If so, add it to the current completion list. */
static void
completion_list_add_name (const char *symname,
completion_list_add_name (completion_tracker &tracker,
const char *symname,
const char *sym_text, int sym_text_len,
const char *text, const char *word)
{
@ -4797,7 +4766,6 @@ completion_list_add_name (const char *symname,
{
char *newobj;
enum maybe_add_completion_enum add_status;
if (word == sym_text)
{
@ -4819,45 +4787,33 @@ completion_list_add_name (const char *symname,
strcat (newobj, symname);
}
add_status = maybe_add_completion (completion_tracker, newobj);
gdb::unique_xmalloc_ptr<char> completion (newobj);
switch (add_status)
{
case MAYBE_ADD_COMPLETION_OK:
VEC_safe_push (char_ptr, return_val, newobj);
break;
case MAYBE_ADD_COMPLETION_OK_MAX_REACHED:
VEC_safe_push (char_ptr, return_val, newobj);
throw_max_completions_reached_error ();
case MAYBE_ADD_COMPLETION_MAX_REACHED:
xfree (newobj);
throw_max_completions_reached_error ();
case MAYBE_ADD_COMPLETION_DUPLICATE:
xfree (newobj);
break;
}
tracker.add_completion (std::move (completion));
}
}
/* completion_list_add_name wrapper for struct symbol. */
static void
completion_list_add_symbol (symbol *sym,
completion_list_add_symbol (completion_tracker &tracker,
symbol *sym,
const char *sym_text, int sym_text_len,
const char *text, const char *word)
{
completion_list_add_name (SYMBOL_NATURAL_NAME (sym),
completion_list_add_name (tracker, SYMBOL_NATURAL_NAME (sym),
sym_text, sym_text_len, text, word);
}
/* completion_list_add_name wrapper for struct minimal_symbol. */
static void
completion_list_add_msymbol (minimal_symbol *sym,
completion_list_add_msymbol (completion_tracker &tracker,
minimal_symbol *sym,
const char *sym_text, int sym_text_len,
const char *text, const char *word)
{
completion_list_add_name (MSYMBOL_NATURAL_NAME (sym),
completion_list_add_name (tracker, MSYMBOL_NATURAL_NAME (sym),
sym_text, sym_text_len, text, word);
}
@ -4865,7 +4821,8 @@ completion_list_add_msymbol (minimal_symbol *sym,
again and feed all the selectors into the mill. */
static void
completion_list_objc_symbol (struct minimal_symbol *msymbol,
completion_list_objc_symbol (completion_tracker &tracker,
struct minimal_symbol *msymbol,
const char *sym_text, int sym_text_len,
const char *text, const char *word)
{
@ -4883,7 +4840,8 @@ completion_list_objc_symbol (struct minimal_symbol *msymbol,
if (sym_text[0] == '[')
/* Complete on shortened method method. */
completion_list_add_name (method + 1, sym_text, sym_text_len, text, word);
completion_list_add_name (tracker, method + 1,
sym_text, sym_text_len, text, word);
while ((strlen (method) + 1) >= tmplen)
{
@ -4904,9 +4862,11 @@ completion_list_objc_symbol (struct minimal_symbol *msymbol,
memcpy (tmp, method, (category - method));
tmp[category - method] = ' ';
memcpy (tmp + (category - method) + 1, selector, strlen (selector) + 1);
completion_list_add_name (tmp, sym_text, sym_text_len, text, word);
completion_list_add_name (tracker, tmp,
sym_text, sym_text_len, text, word);
if (sym_text[0] == '[')
completion_list_add_name (tmp + 1, sym_text, sym_text_len, text, word);
completion_list_add_name (tracker, tmp + 1,
sym_text, sym_text_len, text, word);
}
if (selector != NULL)
@ -4917,7 +4877,8 @@ completion_list_objc_symbol (struct minimal_symbol *msymbol,
if (tmp2 != NULL)
*tmp2 = '\0';
completion_list_add_name (tmp, sym_text, sym_text_len, text, word);
completion_list_add_name (tracker, tmp,
sym_text, sym_text_len, text, word);
}
}
@ -4968,9 +4929,10 @@ language_search_unquoted_string (const char *text, const char *p)
}
static void
completion_list_add_fields (struct symbol *sym, const char *sym_text,
int sym_text_len, const char *text,
const char *word)
completion_list_add_fields (completion_tracker &tracker,
struct symbol *sym,
const char *sym_text, int sym_text_len,
const char *text, const char *word)
{
if (SYMBOL_CLASS (sym) == LOC_TYPEDEF)
{
@ -4981,7 +4943,7 @@ completion_list_add_fields (struct symbol *sym, const char *sym_text,
if (c == TYPE_CODE_UNION || c == TYPE_CODE_STRUCT)
for (j = TYPE_N_BASECLASSES (t); j < TYPE_NFIELDS (t); j++)
if (TYPE_FIELD_NAME (t, j))
completion_list_add_name (TYPE_FIELD_NAME (t, j),
completion_list_add_name (tracker, TYPE_FIELD_NAME (t, j),
sym_text, sym_text_len, text, word);
}
}
@ -4990,6 +4952,7 @@ completion_list_add_fields (struct symbol *sym, const char *sym_text,
static void
add_symtab_completions (struct compunit_symtab *cust,
completion_tracker &tracker,
const char *sym_text, int sym_text_len,
const char *text, const char *word,
enum type_code code)
@ -5011,18 +4974,18 @@ add_symtab_completions (struct compunit_symtab *cust,
if (code == TYPE_CODE_UNDEF
|| (SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN
&& TYPE_CODE (SYMBOL_TYPE (sym)) == code))
completion_list_add_symbol (sym,
completion_list_add_symbol (tracker, sym,
sym_text, sym_text_len,
text, word);
}
}
}
static void
default_make_symbol_completion_list_break_on_1 (const char *text,
const char *word,
const char *break_on,
enum type_code code)
void
default_collect_symbol_completion_matches_break_on
(completion_tracker &tracker,
const char *text, const char *word,
const char *break_on, enum type_code code)
{
/* Problem: All of the symbols have to be copied because readline
frees them. I'm not going to worry about this; hopefully there
@ -5039,7 +5002,6 @@ default_make_symbol_completion_list_break_on_1 (const char *text,
const char *sym_text;
/* Length of sym_text. */
int sym_text_len;
struct cleanup *cleanups;
/* Now look for the symbol we are supposed to complete on. */
{
@ -5109,9 +5071,6 @@ default_make_symbol_completion_list_break_on_1 (const char *text,
}
gdb_assert (sym_text[sym_text_len] == '\0' || sym_text[sym_text_len] == '(');
completion_tracker = new_completion_tracker ();
cleanups = make_cleanup_free_completion_tracker (&completion_tracker);
/* At this point scan through the misc symbol vectors and add each
symbol you find to the list. Eventually we want to ignore
anything that isn't a text symbol (everything else will be
@ -5122,18 +5081,21 @@ default_make_symbol_completion_list_break_on_1 (const char *text,
ALL_MSYMBOLS (objfile, msymbol)
{
QUIT;
completion_list_add_msymbol (msymbol, sym_text, sym_text_len, text,
word);
completion_list_objc_symbol (msymbol, sym_text, sym_text_len, text,
word);
completion_list_add_msymbol (tracker,
msymbol, sym_text, sym_text_len,
text, word);
completion_list_objc_symbol (tracker,
msymbol, sym_text, sym_text_len,
text, word);
}
}
/* Add completions for all currently loaded symbol tables. */
ALL_COMPUNITS (objfile, cust)
add_symtab_completions (cust, sym_text, sym_text_len, text, word,
code);
add_symtab_completions (cust, tracker,
sym_text, sym_text_len, text, word, code);
/* Look through the partial symtabs for all symbols which begin by
matching SYM_TEXT. Expand all CUs that you find to the list. */
@ -5147,6 +5109,7 @@ default_make_symbol_completion_list_break_on_1 (const char *text,
[&] (compunit_symtab *symtab) /* expansion notify */
{
add_symtab_completions (symtab,
tracker,
sym_text, sym_text_len,
text, word, code);
},
@ -5169,14 +5132,17 @@ default_make_symbol_completion_list_break_on_1 (const char *text,
{
if (code == TYPE_CODE_UNDEF)
{
completion_list_add_symbol (sym, sym_text, sym_text_len, text,
completion_list_add_symbol (tracker, sym,
sym_text, sym_text_len, text,
word);
completion_list_add_fields (sym, sym_text, sym_text_len, text,
completion_list_add_fields (tracker, sym,
sym_text, sym_text_len, text,
word);
}
else if (SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN
&& TYPE_CODE (SYMBOL_TYPE (sym)) == code)
completion_list_add_symbol (sym, sym_text, sym_text_len, text,
completion_list_add_symbol (tracker, sym,
sym_text, sym_text_len, text,
word);
}
@ -5194,11 +5160,13 @@ default_make_symbol_completion_list_break_on_1 (const char *text,
{
if (surrounding_static_block != NULL)
ALL_BLOCK_SYMBOLS (surrounding_static_block, iter, sym)
completion_list_add_fields (sym, sym_text, sym_text_len, text, word);
completion_list_add_fields (tracker, sym,
sym_text, sym_text_len, text, word);
if (surrounding_global_block != NULL)
ALL_BLOCK_SYMBOLS (surrounding_global_block, iter, sym)
completion_list_add_fields (sym, sym_text, sym_text_len, text, word);
completion_list_add_fields (tracker, sym,
sym_text, sym_text_len, text, word);
}
/* Skip macros if we are completing a struct tag -- arguable but
@ -5214,7 +5182,7 @@ default_make_symbol_completion_list_break_on_1 (const char *text,
macro_source_file *,
int)
{
completion_list_add_name (macro_name,
completion_list_add_name (tracker, macro_name,
sym_text, sym_text_len,
text, word);
};
@ -5237,74 +5205,52 @@ default_make_symbol_completion_list_break_on_1 (const char *text,
/* User-defined macros are always visible. */
macro_for_each (macro_user_macros, add_macro_name);
}
do_cleanups (cleanups);
}
VEC (char_ptr) *
default_make_symbol_completion_list_break_on (const char *text,
const char *word,
const char *break_on,
enum type_code code)
void
default_collect_symbol_completion_matches (completion_tracker &tracker,
const char *text, const char *word,
enum type_code code)
{
struct cleanup *back_to;
return_val = NULL;
back_to = make_cleanup (do_free_completion_list, &return_val);
TRY
{
default_make_symbol_completion_list_break_on_1 (text, word,
break_on, code);
}
CATCH (except, RETURN_MASK_ERROR)
{
if (except.error != MAX_COMPLETIONS_REACHED_ERROR)
throw_exception (except);
}
END_CATCH
discard_cleanups (back_to);
return return_val;
return default_collect_symbol_completion_matches_break_on (tracker,
text, word, "",
code);
}
VEC (char_ptr) *
default_make_symbol_completion_list (const char *text, const char *word,
enum type_code code)
/* Collect all symbols (regardless of class) which begin by matching
TEXT. */
void
collect_symbol_completion_matches (completion_tracker &tracker,
const char *text, const char *word)
{
return default_make_symbol_completion_list_break_on (text, word, "", code);
current_language->la_collect_symbol_completion_matches (tracker,
text, word,
TYPE_CODE_UNDEF);
}
/* Return a vector of all symbols (regardless of class) which begin by
matching TEXT. If the answer is no symbols, then the return value
is NULL. */
/* Like collect_symbol_completion_matches, but only collect
STRUCT_DOMAIN symbols whose type code is CODE. */
VEC (char_ptr) *
make_symbol_completion_list (const char *text, const char *word)
{
return current_language->la_make_symbol_completion_list (text, word,
TYPE_CODE_UNDEF);
}
/* Like make_symbol_completion_list, but only return STRUCT_DOMAIN
symbols whose type code is CODE. */
VEC (char_ptr) *
make_symbol_completion_type (const char *text, const char *word,
enum type_code code)
void
collect_symbol_completion_matches_type (completion_tracker &tracker,
const char *text, const char *word,
enum type_code code)
{
gdb_assert (code == TYPE_CODE_UNION
|| code == TYPE_CODE_STRUCT
|| code == TYPE_CODE_ENUM);
return current_language->la_make_symbol_completion_list (text, word, code);
current_language->la_collect_symbol_completion_matches (tracker,
text, word, code);
}
/* Like make_symbol_completion_list, but returns a list of symbols
defined in all source files name SRCFILE. */
/* Like collect_symbol_completion_matches, but collects a list of
symbols defined in all source files named SRCFILE. */
static VEC (char_ptr) *
make_file_symbol_completion_list_1 (const char *text, const char *word,
const char *srcfile)
void
collect_file_symbol_completion_matches (completion_tracker &tracker,
const char *text, const char *word,
const char *srcfile)
{
/* The symbol we are completing on. Points in same buffer as text. */
const char *sym_text;
@ -5345,7 +5291,7 @@ make_file_symbol_completion_list_1 (const char *text, const char *word,
/* A double-quoted string is never a symbol, nor does it make sense
to complete it any other way. */
{
return NULL;
return;
}
else
{
@ -5361,42 +5307,11 @@ make_file_symbol_completion_list_1 (const char *text, const char *word,
iterate_over_symtabs (srcfile, [&] (symtab *s)
{
add_symtab_completions (SYMTAB_COMPUNIT (s),
tracker,
sym_text, sym_text_len,
text, word, TYPE_CODE_UNDEF);
return false;
});
return (return_val);
}
/* Wrapper around make_file_symbol_completion_list_1
to handle MAX_COMPLETIONS_REACHED_ERROR. */
VEC (char_ptr) *
make_file_symbol_completion_list (const char *text, const char *word,
const char *srcfile)
{
struct cleanup *back_to, *cleanups;
completion_tracker = new_completion_tracker ();
cleanups = make_cleanup_free_completion_tracker (&completion_tracker);
return_val = NULL;
back_to = make_cleanup (do_free_completion_list, &return_val);
TRY
{
make_file_symbol_completion_list_1 (text, word, srcfile);
}
CATCH (except, RETURN_MASK_ERROR)
{
if (except.error != MAX_COMPLETIONS_REACHED_ERROR)
throw_exception (except);
}
END_CATCH
discard_cleanups (back_to);
do_cleanups (cleanups);
return return_val;
}
/* A helper function for make_source_files_completion_list. It adds
@ -5405,7 +5320,7 @@ make_file_symbol_completion_list (const char *text, const char *word,
static void
add_filename_to_list (const char *fname, const char *text, const char *word,
VEC (char_ptr) **list)
completion_list *list)
{
char *newobj;
size_t fnlen = strlen (fname);
@ -5430,7 +5345,7 @@ add_filename_to_list (const char *fname, const char *text, const char *word,
newobj[text - word] = '\0';
strcat (newobj, fname);
}
VEC_safe_push (char_ptr, *list, newobj);
list->emplace_back (newobj);
}
static int
@ -5458,7 +5373,7 @@ struct add_partial_filename_data
const char *text;
const char *word;
int text_len;
VEC (char_ptr) **list;
completion_list *list;
};
/* A callback for map_partial_symbol_filenames. */
@ -5490,19 +5405,18 @@ maybe_add_partial_symtab_filename (const char *filename, const char *fullname,
}
}
/* Return a vector of all source files whose names begin with matching
/* Return a list of all source files whose names begin with matching
TEXT. The file names are looked up in the symbol tables of this
program. If the answer is no matchess, then the return value is
NULL. */
program. */
VEC (char_ptr) *
completion_list
make_source_files_completion_list (const char *text, const char *word)
{
struct compunit_symtab *cu;
struct symtab *s;
struct objfile *objfile;
size_t text_len = strlen (text);
VEC (char_ptr) *list = NULL;
completion_list list;
const char *base_name;
struct add_partial_filename_data datum;
struct cleanup *back_to;
@ -5510,8 +5424,6 @@ make_source_files_completion_list (const char *text, const char *word)
if (!have_full_symbols () && !have_partial_symbols ())
return list;
back_to = make_cleanup (do_free_completion_list, &list);
filename_seen_cache filenames_seen;
ALL_FILETABS (objfile, cu, s)
@ -5547,8 +5459,6 @@ make_source_files_completion_list (const char *text, const char *word)
map_symbol_filenames (maybe_add_partial_symtab_filename, &datum,
0 /*need_fullname*/);
discard_cleanups (back_to);
return list;
}

31
gdb/symtab.h
View File

@ -25,6 +25,7 @@
#include "gdbtypes.h"
#include "common/enum-flags.h"
#include "common/function-view.h"
#include "completer.h"
/* Opaque declarations. */
struct ui_file;
@ -1498,22 +1499,28 @@ extern void forget_cached_source_info (void);
extern void select_source_symtab (struct symtab *);
extern VEC (char_ptr) *default_make_symbol_completion_list_break_on
(const char *text, const char *word, const char *break_on,
extern void default_collect_symbol_completion_matches_break_on
(completion_tracker &tracker,
const char *text, const char *word, const char *break_on,
enum type_code code);
extern VEC (char_ptr) *default_make_symbol_completion_list (const char *,
const char *,
enum type_code);
extern VEC (char_ptr) *make_symbol_completion_list (const char *, const char *);
extern VEC (char_ptr) *make_symbol_completion_type (const char *, const char *,
extern void default_collect_symbol_completion_matches
(completion_tracker &tracker,
const char *,
const char *,
enum type_code);
extern void collect_symbol_completion_matches (completion_tracker &tracker,
const char *, const char *);
extern void collect_symbol_completion_matches_type (completion_tracker &tracker,
const char *, const char *,
enum type_code);
extern VEC (char_ptr) *make_file_symbol_completion_list (const char *,
const char *,
const char *);
extern void collect_file_symbol_completion_matches (completion_tracker &tracker,
const char *,
const char *,
const char *);
extern VEC (char_ptr) *make_source_files_completion_list (const char *,
const char *);
extern completion_list
make_source_files_completion_list (const char *, const char *);
/* symtab.c */

2
gdb/top.c
View File

@ -2023,7 +2023,7 @@ init_main (void)
/* Setup important stuff for command line editing. */
rl_completion_word_break_hook = gdb_completion_word_break_characters;
rl_completion_entry_function = readline_line_completion_function;
rl_attempted_completion_function = gdb_rl_attempted_completion_function;
set_rl_completer_word_break_characters (default_word_break_characters ());
rl_completer_quote_characters = get_gdb_completer_quote_characters ();
rl_completion_display_matches_hook = cli_display_match_list;

5
gdb/tui/tui-layout.c
View File

@ -353,14 +353,15 @@ tui_default_win_viewport_height (enum tui_win_type type,
/* Complete possible layout names. TEXT is the complete text entered so
far, WORD is the word currently being completed. */
static VEC (char_ptr) *
static void
layout_completer (struct cmd_list_element *ignore,
completion_tracker &tracker,
const char *text, const char *word)
{
static const char *layout_names [] =
{ "src", "asm", "split", "regs", "next", "prev", NULL };
return complete_on_enum (layout_names, text, word);
complete_on_enum (tracker, layout_names, text, word);
}
/* Function to initialize gdb commands, for tui window layout

11
gdb/tui/tui-regs.c
View File

@ -668,24 +668,23 @@ tui_reg_command (char *args, int from_tty)
/* Complete names of register groups, and add the special "prev" and "next"
names. */
static VEC (char_ptr) *
static void
tui_reggroup_completer (struct cmd_list_element *ignore,
completion_tracker &tracker,
const char *text, const char *word)
{
VEC (char_ptr) *result = NULL;
static const char *extra[] = { "next", "prev", NULL };
size_t len = strlen (word);
const char **tmp;
result = reggroup_completer (ignore, text, word);
reggroup_completer (ignore, tracker, text, word);
/* XXXX use complete_on_enum instead? */
for (tmp = extra; *tmp != NULL; ++tmp)
{
if (strncmp (word, *tmp, len) == 0)
VEC_safe_push (char_ptr, result, xstrdup (*tmp));
tracker.add_completion (gdb::unique_xmalloc_ptr<char> (xstrdup (*tmp)));
}
return result;
}
/* Provide a prototype to silence -Wmissing-prototypes. */

28
gdb/tui/tui-win.c
View File

@ -359,12 +359,12 @@ tui_set_var_cmd (char *null_args, int from_tty, struct cmd_list_element *c)
window names 'next' and 'prev' will also be considered as possible
completions of the window name. */
static VEC (char_ptr) *
window_name_completer (int include_next_prev_p,
static void
window_name_completer (completion_tracker &tracker,
int include_next_prev_p,
const char *text, const char *word)
{
VEC (const_char_ptr) *completion_name_vec = NULL;
VEC (char_ptr) *matches_vec;
int win_type;
for (win_type = SRC_WIN; win_type < MAX_MAJOR_WINDOWS; win_type++)
@ -398,39 +398,39 @@ window_name_completer (int include_next_prev_p,
}
VEC_safe_push (const_char_ptr, completion_name_vec, NULL);
matches_vec
= complete_on_enum (VEC_address (const_char_ptr, completion_name_vec),
text, word);
complete_on_enum (tracker,
VEC_address (const_char_ptr, completion_name_vec),
text, word);
VEC_free (const_char_ptr, completion_name_vec);
return matches_vec;
}
/* Complete possible window names to focus on. TEXT is the complete text
entered so far, WORD is the word currently being completed. */
static VEC (char_ptr) *
static void
focus_completer (struct cmd_list_element *ignore,
const char *text, const char *word)
completion_tracker &tracker,
const char *text, const char *word)
{
return window_name_completer (1, text, word);
window_name_completer (tracker, 1, text, word);
}
/* Complete possible window names for winheight command. TEXT is the
complete text entered so far, WORD is the word currently being
completed. */
static VEC (char_ptr) *
static void
winheight_completer (struct cmd_list_element *ignore,
completion_tracker &tracker,
const char *text, const char *word)
{
/* The first word is the window name. That we can complete. Subsequent
words can't be completed. */
if (word != text)
return NULL;
return;
return window_name_completer (0, text, word);
window_name_completer (tracker, 0, text, word);
}
/* Function to initialize gdb commands, for tui window

17
gdb/value.c
View File

@ -41,6 +41,7 @@
#include "cp-abi.h"
#include "user-regs.h"
#include <algorithm>
#include "completer.h"
/* Prototypes for exported functions. */
@ -2144,14 +2145,12 @@ lookup_only_internalvar (const char *name)
return NULL;
}
/* Complete NAME by comparing it to the names of internal variables.
Returns a vector of newly allocated strings, or NULL if no matches
were found. */
/* Complete NAME by comparing it to the names of internal
variables. */
VEC (char_ptr) *
complete_internalvar (const char *name)
void
complete_internalvar (completion_tracker &tracker, const char *name)
{
VEC (char_ptr) *result = NULL;
struct internalvar *var;
int len;
@ -2160,12 +2159,10 @@ complete_internalvar (const char *name)
for (var = internalvars; var; var = var->next)
if (strncmp (var->name, name, len) == 0)
{
char *r = xstrdup (var->name);
gdb::unique_xmalloc_ptr<char> copy (xstrdup (var->name));
VEC_safe_push (char_ptr, result, r);
tracker.add_completion (std::move (copy));
}
return result;
}
/* Create an internal variable with name NAME and with a void value.

3
gdb/value.h
View File

@ -927,7 +927,8 @@ extern struct internalvar *lookup_only_internalvar (const char *name);
extern struct internalvar *create_internalvar (const char *name);
extern VEC (char_ptr) *complete_internalvar (const char *name);
extern void complete_internalvar (completion_tracker &tracker,
const char *name);
/* An internalvar can be dynamically computed by supplying a vector of
function pointers to perform various operations. */