/* Parser for linespec for the GNU debugger, GDB.
- Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
- 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
- Free Software Foundation, Inc.
+
+ Copyright (C) 1986-2019 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "symtab.h"
#include "value.h"
#include "completer.h"
#include "cp-abi.h"
+#include "cp-support.h"
#include "parser-defs.h"
+#include "block.h"
+#include "objc-lang.h"
+#include "linespec.h"
+#include "language.h"
+#include "interps.h"
+#include "mi/mi-cmds.h"
+#include "target.h"
+#include "arch-utils.h"
+#include <ctype.h>
+#include "cli/cli-utils.h"
+#include "filenames.h"
+#include "ada-lang.h"
+#include "stack.h"
+#include "location.h"
+#include "common/function-view.h"
+#include "common/def-vector.h"
+#include <algorithm>
+
+/* An enumeration of the various things a user might attempt to
+ complete for a linespec location. */
+
+enum class linespec_complete_what
+{
+ /* Nothing, no possible completion. */
+ NOTHING,
-/* We share this one with symtab.c, but it is not exported widely. */
+ /* A function/method name. Due to ambiguity between
-extern char *operator_chars (char *, char **);
+ (gdb) b source[TAB]
+ source_file.c
+ source_function
-/* Prototypes for local functions */
+ this can also indicate a source filename, iff we haven't seen a
+ separate source filename component, as in "b source.c:function". */
+ FUNCTION,
-static void initialize_defaults (struct symtab **default_symtab,
- int *default_line);
+ /* A label symbol. E.g., break file.c:function:LABEL. */
+ LABEL,
-static void set_flags (char *arg, int *is_quoted, char **paren_pointer);
+ /* An expression. E.g., "break foo if EXPR", or "break *EXPR". */
+ EXPRESSION,
-static struct symtabs_and_lines decode_indirect (char **argptr);
+ /* A linespec keyword ("if"/"thread"/"task").
+ E.g., "break func threa<tab>". */
+ KEYWORD,
+};
-static char *locate_first_half (char **argptr, int *is_quote_enclosed);
+/* An address entry is used to ensure that any given location is only
+ added to the result a single time. It holds an address and the
+ program space from which the address came. */
-static struct symtabs_and_lines decode_compound (char **argptr,
- int funfirstline,
- char ***canonical,
- char *saved_arg,
- char *p);
+struct address_entry
+{
+ struct program_space *pspace;
+ CORE_ADDR addr;
+};
-static NORETURN void cplusplus_error (const char *name,
- const char *fmt, ...)
- ATTR_NORETURN ATTR_FORMAT (printf, 2, 3);
+/* A linespec. Elements of this structure are filled in by a parser
+ (either parse_linespec or some other function). The structure is
+ then converted into SALs by convert_linespec_to_sals. */
-static int total_number_of_methods (struct type *type);
+struct linespec
+{
+ /* An explicit location describing the SaLs. */
+ struct explicit_location explicit_loc;
+
+ /* The list of symtabs to search to which to limit the search. May not
+ be NULL. If explicit.SOURCE_FILENAME is NULL (no user-specified
+ filename), FILE_SYMTABS should contain one single NULL member. This
+ will cause the code to use the default symtab. */
+ std::vector<symtab *> *file_symtabs;
+
+ /* A list of matching function symbols and minimal symbols. Both lists
+ may be NULL (or empty) if no matching symbols were found. */
+ std::vector<block_symbol> *function_symbols;
+ std::vector<bound_minimal_symbol> *minimal_symbols;
+
+ /* A structure of matching label symbols and the corresponding
+ function symbol in which the label was found. Both may be NULL
+ or both must be non-NULL. */
+ struct
+ {
+ std::vector<block_symbol> *label_symbols;
+ std::vector<block_symbol> *function_symbols;
+ } labels;
+};
+typedef struct linespec *linespec_p;
-static int find_methods (struct type *, char *, struct symbol **);
+/* A canonical linespec represented as a symtab-related string.
-static void build_canonical_line_spec (struct symtab_and_line *,
- char *, char ***);
+ Each entry represents the "SYMTAB:SUFFIX" linespec string.
+ SYMTAB can be converted for example by symtab_to_fullname or
+ symtab_to_filename_for_display as needed. */
-static char *find_toplevel_char (char *s, char c);
+struct linespec_canonical_name
+{
+ /* Remaining text part of the linespec string. */
+ char *suffix;
-static struct symtabs_and_lines decode_line_2 (struct symbol *[],
- int, int, char ***);
+ /* If NULL then SUFFIX is the whole linespec string. */
+ struct symtab *symtab;
+};
-static struct symtab *symtab_from_filename (char **argptr,
- char *p, int is_quote_enclosed);
+/* An instance of this is used to keep all state while linespec
+ operates. This instance is passed around as a 'this' pointer to
+ the various implementation methods. */
-static struct
-symtabs_and_lines decode_all_digits (char **argptr,
- struct symtab *default_symtab,
- int default_line,
- char ***canonical,
- struct symtab *file_symtab,
- char *q);
+struct linespec_state
+{
+ /* The language in use during linespec processing. */
+ const struct language_defn *language;
-static struct symtabs_and_lines decode_dollar (char *copy,
- int funfirstline,
- struct symtab *default_symtab,
- char ***canonical,
- struct symtab *file_symtab);
+ /* The program space as seen when the module was entered. */
+ struct program_space *program_space;
-static struct symtabs_and_lines decode_variable (char *copy,
- int funfirstline,
- char ***canonical,
- struct symtab *file_symtab);
+ /* If not NULL, the search is restricted to just this program
+ space. */
+ struct program_space *search_pspace;
-static struct
-symtabs_and_lines symbol_found (int funfirstline,
- char ***canonical,
- char *copy,
- struct symbol *sym,
- struct symtab *file_symtab,
- struct symtab *sym_symtab);
+ /* The default symtab to use, if no other symtab is specified. */
+ struct symtab *default_symtab;
-static struct
-symtabs_and_lines minsym_found (int funfirstline,
- struct minimal_symbol *msymbol);
+ /* The default line to use. */
+ int default_line;
-/* Helper functions. */
+ /* The 'funfirstline' value that was passed in to decode_line_1 or
+ decode_line_full. */
+ int funfirstline;
-/* Issue a helpful hint on using the command completion feature on
- single quoted demangled C++ symbols as part of the completion
- error. */
+ /* Nonzero if we are running in 'list' mode; see decode_line_list. */
+ int list_mode;
-static NORETURN void
-cplusplus_error (const char *name, const char *fmt, ...)
-{
- struct ui_file *tmp_stream;
- tmp_stream = mem_fileopen ();
- make_cleanup_ui_file_delete (tmp_stream);
+ /* The 'canonical' value passed to decode_line_full, or NULL. */
+ struct linespec_result *canonical;
- {
- va_list args;
- va_start (args, fmt);
- vfprintf_unfiltered (tmp_stream, fmt, args);
- va_end (args);
- }
+ /* Canonical strings that mirror the std::vector<symtab_and_line> result. */
+ struct linespec_canonical_name *canonical_names;
- while (*name == '\'')
- name++;
- fprintf_unfiltered (tmp_stream,
- ("Hint: try '%s<TAB> or '%s<ESC-?>\n"
- "(Note leading single quote.)"),
- name, name);
- error_stream (tmp_stream);
-}
+ /* This is a set of address_entry objects which is used to prevent
+ duplicate symbols from being entered into the result. */
+ htab_t addr_set;
-/* Return the number of methods described for TYPE, including the
- methods from types it derives from. This can't be done in the symbol
- reader because the type of the baseclass might still be stubbed
- when the definition of the derived class is parsed. */
+ /* Are we building a linespec? */
+ int is_linespec;
+};
-static int
-total_number_of_methods (struct type *type)
-{
- int n;
- int count;
+/* This is a helper object that is used when collecting symbols into a
+ result. */
- CHECK_TYPEDEF (type);
- if (TYPE_CPLUS_SPECIFIC (type) == NULL)
- return 0;
- count = TYPE_NFN_FIELDS_TOTAL (type);
+struct collect_info
+{
+ /* The linespec object in use. */
+ struct linespec_state *state;
- for (n = 0; n < TYPE_N_BASECLASSES (type); n++)
- count += total_number_of_methods (TYPE_BASECLASS (type, n));
+ /* A list of symtabs to which to restrict matches. */
+ std::vector<symtab *> *file_symtabs;
- return count;
-}
+ /* The result being accumulated. */
+ struct
+ {
+ std::vector<block_symbol> *symbols;
+ std::vector<bound_minimal_symbol> *minimal_symbols;
+ } result;
-/* Recursive helper function for decode_line_1.
- Look for methods named NAME in type T.
- Return number of matches.
- Put matches in SYM_ARR, which should have been allocated with
- a size of total_number_of_methods (T) * sizeof (struct symbol *).
- Note that this function is g++ specific. */
+ /* Possibly add a symbol to the results. */
+ virtual bool add_symbol (block_symbol *bsym);
+};
-static int
-find_methods (struct type *t, char *name, struct symbol **sym_arr)
+bool
+collect_info::add_symbol (block_symbol *bsym)
{
- int i1 = 0;
- int ibase;
- char *class_name = type_name_no_tag (t);
-
- /* Ignore this class if it doesn't have a name. This is ugly, but
- unless we figure out how to get the physname without the name of
- the class, then the loop can't do any good. */
- if (class_name
- && (lookup_symbol (class_name, (struct block *) NULL,
- STRUCT_NAMESPACE, (int *) NULL,
- (struct symtab **) NULL)))
- {
- int method_counter;
- int name_len = strlen (name);
+ /* In list mode, add all matching symbols, regardless of class.
+ This allows the user to type "list a_global_variable". */
+ if (SYMBOL_CLASS (bsym->symbol) == LOC_BLOCK || this->state->list_mode)
+ this->result.symbols->push_back (*bsym);
- CHECK_TYPEDEF (t);
+ /* Continue iterating. */
+ return true;
+}
- /* Loop over each method name. At this level, all overloads of a name
- are counted as a single name. There is an inner loop which loops over
- each overload. */
+/* Custom collect_info for symbol_searcher. */
- for (method_counter = TYPE_NFN_FIELDS (t) - 1;
- method_counter >= 0;
- --method_counter)
- {
- int field_counter;
- char *method_name = TYPE_FN_FIELDLIST_NAME (t, method_counter);
- char dem_opname[64];
+struct symbol_searcher_collect_info
+ : collect_info
+{
+ bool add_symbol (block_symbol *bsym) override
+ {
+ /* Add everything. */
+ this->result.symbols->push_back (*bsym);
- if (strncmp (method_name, "__", 2) == 0 ||
- strncmp (method_name, "op", 2) == 0 ||
- strncmp (method_name, "type", 4) == 0)
- {
- if (cplus_demangle_opname (method_name, dem_opname, DMGL_ANSI))
- method_name = dem_opname;
- else if (cplus_demangle_opname (method_name, dem_opname, 0))
- method_name = dem_opname;
- }
+ /* Continue iterating. */
+ return true;
+ }
+};
- if (strcmp_iw (name, method_name) == 0)
- /* Find all the overloaded methods with that name. */
- for (field_counter = TYPE_FN_FIELDLIST_LENGTH (t, method_counter) - 1;
- field_counter >= 0;
- --field_counter)
- {
- struct fn_field *f;
- char *phys_name;
+/* Token types */
- f = TYPE_FN_FIELDLIST1 (t, method_counter);
+enum ls_token_type
+{
+ /* A keyword */
+ LSTOKEN_KEYWORD = 0,
- if (TYPE_FN_FIELD_STUB (f, field_counter))
- {
- char *tmp_name;
-
- tmp_name = gdb_mangle_name (t,
- method_counter,
- field_counter);
- phys_name = alloca (strlen (tmp_name) + 1);
- strcpy (phys_name, tmp_name);
- xfree (tmp_name);
- }
- else
- phys_name = TYPE_FN_FIELD_PHYSNAME (f, field_counter);
-
- /* Destructor is handled by caller, dont add it to the list */
- if (is_destructor_name (phys_name) != 0)
- continue;
-
- sym_arr[i1] = lookup_symbol (phys_name,
- NULL, VAR_NAMESPACE,
- (int *) NULL,
- (struct symtab **) NULL);
- if (sym_arr[i1])
- i1++;
- else
- {
- /* This error message gets printed, but the method
- still seems to be found
- fputs_filtered("(Cannot find method ", gdb_stdout);
- fprintf_symbol_filtered (gdb_stdout, phys_name,
- language_cplus,
- DMGL_PARAMS | DMGL_ANSI);
- fputs_filtered(" - possibly inlined.)\n", gdb_stdout);
- */
- }
- }
- else if (strncmp (class_name, name, name_len) == 0
- && (class_name[name_len] == '\0'
- || class_name[name_len] == '<'))
- {
- /* For GCC 3.x and stabs, constructors and destructors have names
- like __base_ctor and __complete_dtor. Check the physname for now
- if we're looking for a constructor. */
- for (field_counter
- = TYPE_FN_FIELDLIST_LENGTH (t, method_counter) - 1;
- field_counter >= 0;
- --field_counter)
- {
- struct fn_field *f;
- char *phys_name;
-
- f = TYPE_FN_FIELDLIST1 (t, method_counter);
+ /* A colon "separator" */
+ LSTOKEN_COLON,
- /* GCC 3.x will never produce stabs stub methods, so we don't need
- to handle this case. */
- if (TYPE_FN_FIELD_STUB (f, field_counter))
- continue;
- phys_name = TYPE_FN_FIELD_PHYSNAME (f, field_counter);
- if (! is_constructor_name (phys_name))
- continue;
+ /* A string */
+ LSTOKEN_STRING,
- /* If this method is actually defined, include it in the
- list. */
- sym_arr[i1] = lookup_symbol (phys_name,
- NULL, VAR_NAMESPACE,
- (int *) NULL,
- (struct symtab **) NULL);
- if (sym_arr[i1])
- i1++;
- }
- }
- }
- }
+ /* A number */
+ LSTOKEN_NUMBER,
- /* Only search baseclasses if there is no match yet, since names in
- derived classes override those in baseclasses.
+ /* A comma */
+ LSTOKEN_COMMA,
- FIXME: The above is not true; it is only true of member functions
- if they have the same number of arguments (??? - section 13.1 of the
- ARM says the function members are not in the same scope but doesn't
- really spell out the rules in a way I understand. In any case, if
- the number of arguments differ this is a case in which we can overload
- rather than hiding without any problem, and gcc 2.4.5 does overload
- rather than hiding in this case). */
+ /* EOI (end of input) */
+ LSTOKEN_EOI,
- if (i1 == 0)
- for (ibase = 0; ibase < TYPE_N_BASECLASSES (t); ibase++)
- i1 += find_methods (TYPE_BASECLASS (t, ibase), name, sym_arr + i1);
+ /* Consumed token */
+ LSTOKEN_CONSUMED
+};
+typedef enum ls_token_type linespec_token_type;
- return i1;
-}
+/* List of keywords. This is NULL-terminated so that it can be used
+ as enum completer. */
+const char * const linespec_keywords[] = { "if", "thread", "task", NULL };
+#define IF_KEYWORD_INDEX 0
-/* Helper function for decode_line_1.
- Build a canonical line spec in CANONICAL if it is non-NULL and if
- the SAL has a symtab.
- If SYMNAME is non-NULL the canonical line spec is `filename:symname'.
- If SYMNAME is NULL the line number from SAL is used and the canonical
- line spec is `filename:linenum'. */
+/* A token of the linespec lexer */
-static void
-build_canonical_line_spec (struct symtab_and_line *sal, char *symname,
- char ***canonical)
+struct ls_token
{
- char **canonical_arr;
- char *canonical_name;
- char *filename;
- struct symtab *s = sal->symtab;
+ /* The type of the token */
+ linespec_token_type type;
- if (s == (struct symtab *) NULL
- || s->filename == (char *) NULL
- || canonical == (char ***) NULL)
- return;
-
- canonical_arr = (char **) xmalloc (sizeof (char *));
- *canonical = canonical_arr;
-
- filename = s->filename;
- if (symname != NULL)
- {
- canonical_name = xmalloc (strlen (filename) + strlen (symname) + 2);
- sprintf (canonical_name, "%s:%s", filename, symname);
- }
- else
- {
- canonical_name = xmalloc (strlen (filename) + 30);
- sprintf (canonical_name, "%s:%d", filename, sal->line);
- }
- canonical_arr[0] = canonical_name;
-}
-
-
-
-/* Find an instance of the character C in the string S that is outside
- of all parenthesis pairs, single-quoted strings, and double-quoted
- strings. Also, ignore the char within a template name, like a ','
- within foo<int, int>. */
-
-static char *
-find_toplevel_char (char *s, char c)
-{
- int quoted = 0; /* zero if we're not in quotes;
- '"' if we're in a double-quoted string;
- '\'' if we're in a single-quoted string. */
- int depth = 0; /* number of unclosed parens we've seen */
- char *scan;
+ /* Data for the token */
+ union
+ {
+ /* A string, given as a stoken */
+ struct stoken string;
- for (scan = s; *scan; scan++)
- {
- if (quoted)
- {
- if (*scan == quoted)
- quoted = 0;
- else if (*scan == '\\' && *(scan + 1))
- scan++;
- }
- else if (*scan == c && ! quoted && depth == 0)
- return scan;
- else if (*scan == '"' || *scan == '\'')
- quoted = *scan;
- else if (*scan == '(' || *scan == '<')
- depth++;
- else if ((*scan == ')' || *scan == '>') && depth > 0)
- depth--;
- }
+ /* A keyword */
+ const char *keyword;
+ } data;
+};
+typedef struct ls_token linespec_token;
- return 0;
-}
+#define LS_TOKEN_STOKEN(TOK) (TOK).data.string
+#define LS_TOKEN_KEYWORD(TOK) (TOK).data.keyword
-/* Given a list of NELTS symbols in SYM_ARR, return a list of lines to
- operate on (ask user if necessary).
- If CANONICAL is non-NULL return a corresponding array of mangled names
- as canonical line specs there. */
+/* An instance of the linespec parser. */
-static struct symtabs_and_lines
-decode_line_2 (struct symbol *sym_arr[], int nelts, int funfirstline,
- char ***canonical)
+struct linespec_parser
{
- struct symtabs_and_lines values, return_values;
- char *args, *arg1;
- int i;
- char *prompt;
- char *symname;
- struct cleanup *old_chain;
- char **canonical_arr = (char **) NULL;
+ linespec_parser (int flags, const struct language_defn *language,
+ struct program_space *search_pspace,
+ struct symtab *default_symtab,
+ int default_line,
+ struct linespec_result *canonical);
- values.sals = (struct symtab_and_line *)
- alloca (nelts * sizeof (struct symtab_and_line));
- return_values.sals = (struct symtab_and_line *)
- xmalloc (nelts * sizeof (struct symtab_and_line));
- old_chain = make_cleanup (xfree, return_values.sals);
-
- if (canonical)
- {
- canonical_arr = (char **) xmalloc (nelts * sizeof (char *));
- make_cleanup (xfree, canonical_arr);
- memset (canonical_arr, 0, nelts * sizeof (char *));
- *canonical = canonical_arr;
- }
+ ~linespec_parser ();
- i = 0;
- printf_unfiltered ("[0] cancel\n[1] all\n");
- while (i < nelts)
- {
- init_sal (&return_values.sals[i]); /* initialize to zeroes */
- init_sal (&values.sals[i]);
- if (sym_arr[i] && SYMBOL_CLASS (sym_arr[i]) == LOC_BLOCK)
- {
- values.sals[i] = find_function_start_sal (sym_arr[i], funfirstline);
- printf_unfiltered ("[%d] %s at %s:%d\n",
- (i + 2),
- SYMBOL_SOURCE_NAME (sym_arr[i]),
- values.sals[i].symtab->filename,
- values.sals[i].line);
- }
- else
- printf_unfiltered ("?HERE\n");
- i++;
- }
+ DISABLE_COPY_AND_ASSIGN (linespec_parser);
- if ((prompt = getenv ("PS2")) == NULL)
- {
- prompt = "> ";
- }
- args = command_line_input (prompt, 0, "overload-choice");
+ /* Lexer internal data */
+ struct
+ {
+ /* Save head of input stream. */
+ const char *saved_arg;
- if (args == 0 || *args == 0)
- error_no_arg ("one or more choice numbers");
+ /* Head of the input stream. */
+ const char *stream;
+#define PARSER_STREAM(P) ((P)->lexer.stream)
- i = 0;
- while (*args)
- {
- int num;
+ /* The current token. */
+ linespec_token current;
+ } lexer {};
- arg1 = args;
- while (*arg1 >= '0' && *arg1 <= '9')
- arg1++;
- if (*arg1 && *arg1 != ' ' && *arg1 != '\t')
- error ("Arguments must be choice numbers.");
+ /* Is the entire linespec quote-enclosed? */
+ int is_quote_enclosed = 0;
- num = atoi (args);
+ /* The state of the parse. */
+ struct linespec_state state {};
+#define PARSER_STATE(PPTR) (&(PPTR)->state)
- if (num == 0)
- error ("canceled");
- else if (num == 1)
- {
- if (canonical_arr)
- {
- for (i = 0; i < nelts; i++)
- {
- if (canonical_arr[i] == NULL)
- {
- symname = SYMBOL_NAME (sym_arr[i]);
- canonical_arr[i] = savestring (symname, strlen (symname));
- }
- }
- }
- memcpy (return_values.sals, values.sals,
- (nelts * sizeof (struct symtab_and_line)));
- return_values.nelts = nelts;
- discard_cleanups (old_chain);
- return return_values;
- }
+ /* The result of the parse. */
+ struct linespec result {};
+#define PARSER_RESULT(PPTR) (&(PPTR)->result)
- if (num >= nelts + 2)
- {
- printf_unfiltered ("No choice number %d.\n", num);
- }
- else
- {
- num -= 2;
- if (values.sals[num].pc)
- {
- if (canonical_arr)
- {
- symname = SYMBOL_NAME (sym_arr[num]);
- make_cleanup (xfree, symname);
- canonical_arr[i] = savestring (symname, strlen (symname));
- }
- return_values.sals[i++] = values.sals[num];
- values.sals[num].pc = 0;
- }
- else
- {
- printf_unfiltered ("duplicate request for %d ignored.\n", num);
- }
- }
+ /* What the parser believes the current word point should complete
+ to. */
+ linespec_complete_what complete_what = linespec_complete_what::NOTHING;
- args = arg1;
- while (*args == ' ' || *args == '\t')
- args++;
- }
- return_values.nelts = i;
- discard_cleanups (old_chain);
- return return_values;
-}
-\f
-/* The parser of linespec itself. */
+ /* The completion word point. The parser advances this as it skips
+ tokens. At some point the input string will end or parsing will
+ fail, and then we attempt completion at the captured completion
+ word point, interpreting the string at completion_word as
+ COMPLETE_WHAT. */
+ const char *completion_word = nullptr;
-/* Parse a string that specifies a line number.
- Pass the address of a char * variable; that variable will be
- advanced over the characters actually parsed.
+ /* If the current token was a quoted string, then this is the
+ quoting character (either " or '). */
+ int completion_quote_char = 0;
- The string can be:
+ /* If the current token was a quoted string, then this points at the
+ end of the quoted string. */
+ const char *completion_quote_end = nullptr;
- LINENUM -- that line number in current file. PC returned is 0.
- FILE:LINENUM -- that line in that file. PC returned is 0.
- FUNCTION -- line number of openbrace of that function.
- PC returned is the start of the function.
- VARIABLE -- line number of definition of that variable.
- PC returned is 0.
- FILE:FUNCTION -- likewise, but prefer functions in that file.
- *EXPR -- line in which address EXPR appears.
+ /* If parsing for completion, then this points at the completion
+ tracker. Otherwise, this is NULL. */
+ struct completion_tracker *completion_tracker = nullptr;
+};
- This may all be followed by an "if EXPR", which we ignore.
+/* A convenience macro for accessing the explicit location result of
+ the parser. */
+#define PARSER_EXPLICIT(PPTR) (&PARSER_RESULT ((PPTR))->explicit_loc)
- FUNCTION may be an undebuggable function found in minimal symbol table.
+/* Prototypes for local functions. */
- If the argument FUNFIRSTLINE is nonzero, we want the first line
- of real code inside a function when a function is specified, and it is
- not OK to specify a variable or type to get its line number.
+static void iterate_over_file_blocks
+ (struct symtab *symtab, const lookup_name_info &name,
+ domain_enum domain,
+ gdb::function_view<symbol_found_callback_ftype> callback);
- DEFAULT_SYMTAB specifies the file to use if none is specified.
- It defaults to current_source_symtab.
- DEFAULT_LINE specifies the line number to use for relative
- line numbers (that start with signs). Defaults to current_source_line.
- If CANONICAL is non-NULL, store an array of strings containing the canonical
- line specs there if necessary. Currently overloaded member functions and
- line numbers or static functions without a filename yield a canonical
- line spec. The array and the line spec strings are allocated on the heap,
- it is the callers responsibility to free them.
+static void initialize_defaults (struct symtab **default_symtab,
+ int *default_line);
- Note that it is possible to return zero for the symtab
- if no file is validly specified. Callers must check that.
- Also, the line number returned may be invalid. */
+CORE_ADDR linespec_expression_to_pc (const char **exp_ptr);
-/* We allow single quotes in various places. This is a hideous
- kludge, which exists because the completer can't yet deal with the
- lack of single quotes. FIXME: write a linespec_completer which we
- can use as appropriate instead of make_symbol_completion_list. */
-
-struct symtabs_and_lines
-decode_line_1 (char **argptr, int funfirstline, struct symtab *default_symtab,
- int default_line, char ***canonical)
-{
- char *p;
- char *q;
- /* If a file name is specified, this is its symtab. */
- struct symtab *file_symtab = NULL;
-
- char *copy;
- /* This is NULL if there are no parens in *ARGPTR, or a pointer to
- the closing parenthesis if there are parens. */
- char *paren_pointer;
- /* This says whether or not something in *ARGPTR is quoted with
- completer_quotes (i.e. with single quotes). */
- int is_quoted;
- /* Is part of *ARGPTR is enclosed in double quotes? */
- int is_quote_enclosed;
- char *saved_arg = *argptr;
-
- /* Defaults have defaults. */
-
- initialize_defaults (&default_symtab, &default_line);
-
- /* See if arg is *PC */
+static std::vector<symtab_and_line> decode_objc (struct linespec_state *self,
+ linespec_p ls,
+ const char *arg);
- if (**argptr == '*')
- return decode_indirect (argptr);
+static std::vector<symtab *> symtabs_from_filename
+ (const char *, struct program_space *pspace);
- /* Set various flags.
- * 'paren_pointer' is important for overload checking, where
- * we allow things like:
- * (gdb) break c::f(int)
- */
+static std::vector<block_symbol> *find_label_symbols
+ (struct linespec_state *self, std::vector<block_symbol> *function_symbols,
+ std::vector<block_symbol> *label_funcs_ret, const char *name,
+ bool completion_mode = false);
- set_flags (*argptr, &is_quoted, &paren_pointer);
+static void find_linespec_symbols (struct linespec_state *self,
+ std::vector<symtab *> *file_symtabs,
+ const char *name,
+ symbol_name_match_type name_match_type,
+ std::vector<block_symbol> *symbols,
+ std::vector<bound_minimal_symbol> *minsyms);
- /* Check to see if it's a multipart linespec (with colons or
- periods). */
+static struct line_offset
+ linespec_parse_variable (struct linespec_state *self,
+ const char *variable);
- /* Locate the end of the first half of the linespec. */
+static int symbol_to_sal (struct symtab_and_line *result,
+ int funfirstline, struct symbol *sym);
- p = locate_first_half (argptr, &is_quote_enclosed);
+static void add_matching_symbols_to_info (const char *name,
+ symbol_name_match_type name_match_type,
+ enum search_domain search_domain,
+ struct collect_info *info,
+ struct program_space *pspace);
- /* Does it look like there actually were two parts? */
+static void add_all_symbol_names_from_pspace
+ (struct collect_info *info, struct program_space *pspace,
+ const std::vector<const char *> &names, enum search_domain search_domain);
- if ((p[0] == ':' || p[0] == '.') && paren_pointer == NULL)
- {
- if (is_quoted)
- *argptr = *argptr + 1;
-
- /* Is it a C++ or Java compound data structure? */
+static std::vector<symtab *>
+ collect_symtabs_from_filename (const char *file,
+ struct program_space *pspace);
- if (p[0] == '.' || p[1] == ':')
- return decode_compound (argptr, funfirstline, canonical,
- saved_arg, p);
+static std::vector<symtab_and_line> decode_digits_ordinary
+ (struct linespec_state *self,
+ linespec_p ls,
+ int line,
+ linetable_entry **best_entry);
- /* No, the first part is a filename; set s to be that file's
- symtab. Also, move argptr past the filename. */
+static std::vector<symtab_and_line> decode_digits_list_mode
+ (struct linespec_state *self,
+ linespec_p ls,
+ struct symtab_and_line val);
- file_symtab = symtab_from_filename (argptr, p, is_quote_enclosed);
- }
-#if 0
- /* No one really seems to know why this was added. It certainly
- breaks the command line, though, whenever the passed
- name is of the form ClassName::Method. This bit of code
- singles out the class name, and if funfirstline is set (for
- example, you are setting a breakpoint at this function),
- you get an error. This did not occur with earlier
- verions, so I am ifdef'ing this out. 3/29/99 */
- else
- {
- /* Check if what we have till now is a symbol name */
+static void minsym_found (struct linespec_state *self, struct objfile *objfile,
+ struct minimal_symbol *msymbol,
+ std::vector<symtab_and_line> *result);
- /* We may be looking at a template instantiation such
- as "foo<int>". Check here whether we know about it,
- instead of falling through to the code below which
- handles ordinary function names, because that code
- doesn't like seeing '<' and '>' in a name -- the
- skip_quoted call doesn't go past them. So see if we
- can figure it out right now. */
+static bool compare_symbols (const block_symbol &a, const block_symbol &b);
- copy = (char *) alloca (p - *argptr + 1);
- memcpy (copy, *argptr, p - *argptr);
- copy[p - *argptr] = '\000';
- sym = lookup_symbol (copy, 0, VAR_NAMESPACE, 0, &sym_symtab);
- if (sym)
- {
- *argptr = (*p == '\'') ? p + 1 : p;
- return symbol_found (funfirstline, canonical, copy, sym,
- NULL, sym_symtab);
- }
- /* Otherwise fall out from here and go to file/line spec
- processing, etc. */
- }
-#endif
+static bool compare_msymbols (const bound_minimal_symbol &a,
+ const bound_minimal_symbol &b);
- /* S is specified file's symtab, or 0 if no file specified.
- arg no longer contains the file name. */
+/* Permitted quote characters for the parser. This is different from the
+ completer's quote characters to allow backward compatibility with the
+ previous parser. */
+static const char *const linespec_quote_characters = "\"\'";
- /* Check whether arg is all digits (and sign) */
+/* Lexer functions. */
- q = *argptr;
- if (*q == '-' || *q == '+')
- q++;
- while (*q >= '0' && *q <= '9')
- q++;
+/* Lex a number from the input in PARSER. This only supports
+ decimal numbers.
- if (q != *argptr && (*q == 0 || *q == ' ' || *q == '\t' || *q == ','))
- /* We found a token consisting of all digits -- at least one digit. */
- return decode_all_digits (argptr, default_symtab, default_line,
- canonical, file_symtab, q);
+ Return true if input is decimal numbers. Return false if not. */
- /* Arg token is not digits => try it as a variable name
- Find the next token (everything up to end or next whitespace). */
+static int
+linespec_lexer_lex_number (linespec_parser *parser, linespec_token *tokenp)
+{
+ tokenp->type = LSTOKEN_NUMBER;
+ LS_TOKEN_STOKEN (*tokenp).length = 0;
+ LS_TOKEN_STOKEN (*tokenp).ptr = PARSER_STREAM (parser);
- if (**argptr == '$') /* May be a convenience variable */
- p = skip_quoted (*argptr + (((*argptr)[1] == '$') ? 2 : 1)); /* One or two $ chars possible */
- else if (is_quoted)
+ /* Keep any sign at the start of the stream. */
+ if (*PARSER_STREAM (parser) == '+' || *PARSER_STREAM (parser) == '-')
{
- p = skip_quoted (*argptr);
- if (p[-1] != '\'')
- error ("Unmatched single quote.");
+ ++LS_TOKEN_STOKEN (*tokenp).length;
+ ++(PARSER_STREAM (parser));
}
- else if (paren_pointer != NULL)
+
+ while (isdigit (*PARSER_STREAM (parser)))
{
- p = paren_pointer + 1;
+ ++LS_TOKEN_STOKEN (*tokenp).length;
+ ++(PARSER_STREAM (parser));
}
- else
+
+ /* If the next character in the input buffer is not a space, comma,
+ quote, or colon, this input does not represent a number. */
+ if (*PARSER_STREAM (parser) != '\0'
+ && !isspace (*PARSER_STREAM (parser)) && *PARSER_STREAM (parser) != ','
+ && *PARSER_STREAM (parser) != ':'
+ && !strchr (linespec_quote_characters, *PARSER_STREAM (parser)))
{
- p = skip_quoted (*argptr);
+ PARSER_STREAM (parser) = LS_TOKEN_STOKEN (*tokenp).ptr;
+ return 0;
}
- copy = (char *) alloca (p - *argptr + 1);
- memcpy (copy, *argptr, p - *argptr);
- copy[p - *argptr] = '\0';
- if (p != *argptr
- && copy[0]
- && copy[0] == copy[p - *argptr - 1]
- && strchr (get_gdb_completer_quote_characters (), copy[0]) != NULL)
+ return 1;
+}
+
+/* See linespec.h. */
+
+const char *
+linespec_lexer_lex_keyword (const char *p)
+{
+ int i;
+
+ if (p != NULL)
{
- copy[p - *argptr - 1] = '\0';
- copy++;
- }
- while (*p == ' ' || *p == '\t')
- p++;
- *argptr = p;
+ for (i = 0; linespec_keywords[i] != NULL; ++i)
+ {
+ int len = strlen (linespec_keywords[i]);
+
+ /* If P begins with one of the keywords and the next
+ character is whitespace, we may have found a keyword.
+ It is only a keyword if it is not followed by another
+ keyword. */
+ if (strncmp (p, linespec_keywords[i], len) == 0
+ && isspace (p[len]))
+ {
+ int j;
- /* If it starts with $: may be a legitimate variable or routine name
- (e.g. HP-UX millicode routines such as $$dyncall), or it may
- be history value, or it may be a convenience variable */
+ /* Special case: "if" ALWAYS stops the lexer, since it
+ is not possible to predict what is going to appear in
+ the condition, which can only be parsed after SaLs have
+ been found. */
+ if (i != IF_KEYWORD_INDEX)
+ {
+ p += len;
+ p = skip_spaces (p);
+ for (j = 0; linespec_keywords[j] != NULL; ++j)
+ {
+ int nextlen = strlen (linespec_keywords[j]);
- if (*copy == '$')
- return decode_dollar (copy, funfirstline, default_symtab,
- canonical, file_symtab);
+ if (strncmp (p, linespec_keywords[j], nextlen) == 0
+ && isspace (p[nextlen]))
+ return NULL;
+ }
+ }
- /* Look up that token as a variable.
- If file specified, use that file's per-file block to start with. */
+ return linespec_keywords[i];
+ }
+ }
+ }
- return decode_variable (copy, funfirstline, canonical, file_symtab);
+ return NULL;
}
-\f
+/* See description in linespec.h. */
-/* Now, more helper functions for decode_line_1. Some conventions
- that these functions follow:
-
- Decode_line_1 typically passes along some of its arguments or local
- variables to the subfunctions. It passes the variables by
- reference if they are modified by the subfunction, and by value
- otherwise.
-
- Some of the functions have side effects that don't arise from
- variables that are passed by reference. In particular, if a
- function is passed ARGPTR as an argument, it modifies what ARGPTR
- points to; typically, it advances *ARGPTR past whatever substring
- it has just looked at. (If it doesn't modify *ARGPTR, then the
- function gets passed *ARGPTR instead, which is then called ARG: see
- set_flags, for example.) Also, functions that return a struct
- symtabs_and_lines may modify CANONICAL, as in the description of
- decode_line_1.
-
- If a function returns a struct symtabs_and_lines, then that struct
- will immediately make its way up the call chain to be returned by
- decode_line_1. In particular, all of the functions decode_XXX
- calculate the appropriate struct symtabs_and_lines, under the
- assumption that their argument is of the form XXX. */
+int
+is_ada_operator (const char *string)
+{
+ const struct ada_opname_map *mapping;
-/* First, some functions to initialize stuff at the beggining of the
- function. */
+ for (mapping = ada_opname_table;
+ mapping->encoded != NULL
+ && !startswith (string, mapping->decoded); ++mapping)
+ ;
-static void
-initialize_defaults (struct symtab **default_symtab, int *default_line)
-{
- if (*default_symtab == 0)
- {
- /* Use whatever we have for the default source line. We don't use
- get_current_or_default_symtab_and_line as it can recurse and call
- us back! */
- struct symtab_and_line cursal =
- get_current_source_symtab_and_line ();
-
- *default_symtab = cursal.symtab;
- *default_line = cursal.line;
- }
+ return mapping->decoded == NULL ? 0 : strlen (mapping->decoded);
}
-static void
-set_flags (char *arg, int *is_quoted, char **paren_pointer)
+/* Find QUOTE_CHAR in STRING, accounting for the ':' terminal. Return
+ the location of QUOTE_CHAR, or NULL if not found. */
+
+static const char *
+skip_quote_char (const char *string, char quote_char)
{
- char *ii;
- int has_if = 0;
+ const char *p, *last;
- /* 'has_if' is for the syntax:
- * (gdb) break foo if (a==b)
- */
- if ((ii = strstr (arg, " if ")) != NULL ||
- (ii = strstr (arg, "\tif ")) != NULL ||
- (ii = strstr (arg, " if\t")) != NULL ||
- (ii = strstr (arg, "\tif\t")) != NULL ||
- (ii = strstr (arg, " if(")) != NULL ||
- (ii = strstr (arg, "\tif( ")) != NULL)
- has_if = 1;
- /* Temporarily zap out "if (condition)" to not
- * confuse the parenthesis-checking code below.
- * This is undone below. Do not change ii!!
- */
- if (has_if)
+ p = last = find_toplevel_char (string, quote_char);
+ while (p && *p != '\0' && *p != ':')
{
- *ii = '\0';
+ p = find_toplevel_char (p, quote_char);
+ if (p != NULL)
+ last = p++;
}
- *is_quoted = (*arg
- && strchr (get_gdb_completer_quote_characters (),
- *arg) != NULL);
-
- *paren_pointer = strchr (arg, '(');
- if (*paren_pointer != NULL)
- *paren_pointer = strrchr (*paren_pointer, ')');
-
- /* Now that we're safely past the paren_pointer check,
- * put back " if (condition)" so outer layers can see it
- */
- if (has_if)
- *ii = ' ';
+ return last;
}
-\f
-
-/* Decode arg of the form *PC. */
+/* Make a writable copy of the string given in TOKEN, trimming
+ any trailing whitespace. */
-static struct symtabs_and_lines
-decode_indirect (char **argptr)
+static gdb::unique_xmalloc_ptr<char>
+copy_token_string (linespec_token token)
{
- struct symtabs_and_lines values;
- CORE_ADDR pc;
-
- (*argptr)++;
- pc = parse_and_eval_address_1 (argptr);
+ const char *str, *s;
- values.sals = (struct symtab_and_line *)
- xmalloc (sizeof (struct symtab_and_line));
+ if (token.type == LSTOKEN_KEYWORD)
+ return gdb::unique_xmalloc_ptr<char> (xstrdup (LS_TOKEN_KEYWORD (token)));
- values.nelts = 1;
- values.sals[0] = find_pc_line (pc, 0);
- values.sals[0].pc = pc;
- values.sals[0].section = find_pc_overlay (pc);
+ str = LS_TOKEN_STOKEN (token).ptr;
+ s = remove_trailing_whitespace (str, str + LS_TOKEN_STOKEN (token).length);
- return values;
+ return gdb::unique_xmalloc_ptr<char> (savestring (str, s - str));
}
-\f
-
-/* Locate the first half of the linespec, ending in a colon, period,
- or whitespace. (More or less.) Also, check to see if *ARGPTR is
- enclosed in double quotes; if so, set is_quote_enclosed, advance
- ARGPTR past that and zero out the trailing double quote. */
+/* Does P represent the end of a quote-enclosed linespec? */
-static char *
-locate_first_half (char **argptr, int *is_quote_enclosed)
+static int
+is_closing_quote_enclosed (const char *p)
{
- char *ii;
- char *p, *p1;
- int has_comma;
-
- /* Maybe we were called with a line range FILENAME:LINENUM,FILENAME:LINENUM
- and we must isolate the first half. Outer layers will call again later
- for the second half.
-
- Don't count commas that appear in argument lists of overloaded
- functions, or in quoted strings. It's stupid to go to this much
- trouble when the rest of the function is such an obvious roach hotel. */
- ii = find_toplevel_char (*argptr, ',');
- has_comma = (ii != 0);
+ if (strchr (linespec_quote_characters, *p))
+ ++p;
+ p = skip_spaces ((char *) p);
+ return (*p == '\0' || linespec_lexer_lex_keyword (p));
+}
- /* Temporarily zap out second half to not
- * confuse the code below.
- * This is undone below. Do not change ii!!
- */
- if (has_comma)
- {
- *ii = '\0';
- }
+/* Find the end of the parameter list that starts with *INPUT.
+ This helper function assists with lexing string segments
+ which might contain valid (non-terminating) commas. */
- /* Maybe arg is FILE : LINENUM or FILE : FUNCTION */
- /* May also be CLASS::MEMBER, or NAMESPACE::NAME */
- /* Look for ':', but ignore inside of <> */
+static const char *
+find_parameter_list_end (const char *input)
+{
+ char end_char, start_char;
+ int depth;
+ const char *p;
+
+ start_char = *input;
+ if (start_char == '(')
+ end_char = ')';
+ else if (start_char == '<')
+ end_char = '>';
+ else
+ return NULL;
- p = *argptr;
- if (p[0] == '"')
+ p = input;
+ depth = 0;
+ while (*p)
{
- *is_quote_enclosed = 1;
- (*argptr)++;
- p++;
- }
- else
- *is_quote_enclosed = 0;
- for (; *p; p++)
- {
- if (p[0] == '<')
- {
- char *temp_end = find_template_name_end (p);
- if (!temp_end)
- error ("malformed template specification in command");
- p = temp_end;
- }
- /* Check for the end of the first half of the linespec. End of line,
- a tab, a double colon or the last single colon, or a space. But
- if enclosed in double quotes we do not break on enclosed spaces */
- if (!*p
- || p[0] == '\t'
- || ((p[0] == ':')
- && ((p[1] == ':') || (strchr (p + 1, ':') == NULL)))
- || ((p[0] == ' ') && !*is_quote_enclosed))
- break;
- if (p[0] == '.' && strchr (p, ':') == NULL) /* Java qualified method. */
+ if (*p == start_char)
+ ++depth;
+ else if (*p == end_char)
{
- /* Find the *last* '.', since the others are package qualifiers. */
- for (p1 = p; *p1; p1++)
+ if (--depth == 0)
{
- if (*p1 == '.')
- p = p1;
+ ++p;
+ break;
}
- break;
}
+ ++p;
}
- while (p[0] == ' ' || p[0] == '\t')
- p++;
- /* if the closing double quote was left at the end, remove it */
- if (*is_quote_enclosed)
+ return p;
+}
+
+/* If the [STRING, STRING_LEN) string ends with what looks like a
+ keyword, return the keyword start offset in STRING. Return -1
+ otherwise. */
+
+static size_t
+string_find_incomplete_keyword_at_end (const char * const *keywords,
+ const char *string, size_t string_len)
+{
+ const char *end = string + string_len;
+ const char *p = end;
+
+ while (p > string && *p != ' ')
+ --p;
+ if (p > string)
{
- char *closing_quote = strchr (p - 1, '"');
- if (closing_quote && closing_quote[1] == '\0')
- *closing_quote = '\0';
+ p++;
+ size_t len = end - p;
+ for (size_t i = 0; keywords[i] != NULL; ++i)
+ if (strncmp (keywords[i], p, len) == 0)
+ return p - string;
}
- /* Now that we've safely parsed the first half,
- * put back ',' so outer layers can see it
- */
- if (has_comma)
- *ii = ',';
-
- return p;
+ return -1;
}
-\f
+/* Lex a string from the input in PARSER. */
-/* This handles C++ and Java compound data structures. P should point
- at the first component separator, i.e. double-colon or period. */
-
-static struct symtabs_and_lines
-decode_compound (char **argptr, int funfirstline, char ***canonical,
- char *saved_arg, char *p)
-{
- struct symtabs_and_lines values;
- char *p1, *p2;
-#if 0
- char *q, *q1;
-#endif
- char *saved_arg2 = *argptr;
- char *temp_end;
- struct symbol *sym;
- /* The symtab that SYM was found in. */
- struct symtab *sym_symtab;
- char *copy;
- struct symbol *sym_class;
- int i1;
- struct symbol **sym_arr;
- struct type *t;
+static linespec_token
+linespec_lexer_lex_string (linespec_parser *parser)
+{
+ linespec_token token;
+ const char *start = PARSER_STREAM (parser);
- /* First check for "global" namespace specification,
- of the form "::foo". If found, skip over the colons
- and jump to normal symbol processing */
- if (p[0] == ':'
- && ((*argptr == p) || (p[-1] == ' ') || (p[-1] == '\t')))
- saved_arg2 += 2;
-
- /* We have what looks like a class or namespace
- scope specification (A::B), possibly with many
- levels of namespaces or classes (A::B::C::D).
-
- Some versions of the HP ANSI C++ compiler (as also possibly
- other compilers) generate class/function/member names with
- embedded double-colons if they are inside namespaces. To
- handle this, we loop a few times, considering larger and
- larger prefixes of the string as though they were single
- symbols. So, if the initially supplied string is
- A::B::C::D::foo, we have to look up "A", then "A::B",
- then "A::B::C", then "A::B::C::D", and finally
- "A::B::C::D::foo" as single, monolithic symbols, because
- A, B, C or D may be namespaces.
-
- Note that namespaces can nest only inside other
- namespaces, and not inside classes. So we need only
- consider *prefixes* of the string; there is no need to look up
- "B::C" separately as a symbol in the previous example. */
-
- p2 = p; /* save for restart */
- while (1)
+ token.type = LSTOKEN_STRING;
+
+ /* If the input stream starts with a quote character, skip to the next
+ quote character, regardless of the content. */
+ if (strchr (linespec_quote_characters, *PARSER_STREAM (parser)))
{
- /* Extract the class name. */
- p1 = p;
- while (p != *argptr && p[-1] == ' ')
- --p;
- copy = (char *) alloca (p - *argptr + 1);
- memcpy (copy, *argptr, p - *argptr);
- copy[p - *argptr] = 0;
-
- /* Discard the class name from the arg. */
- p = p1 + (p1[0] == ':' ? 2 : 1);
- while (*p == ' ' || *p == '\t')
- p++;
- *argptr = p;
-
- sym_class = lookup_symbol (copy, 0, STRUCT_NAMESPACE, 0,
- (struct symtab **) NULL);
-
- if (sym_class &&
- (t = check_typedef (SYMBOL_TYPE (sym_class)),
- (TYPE_CODE (t) == TYPE_CODE_STRUCT
- || TYPE_CODE (t) == TYPE_CODE_UNION)))
- {
- /* Arg token is not digits => try it as a function name
- Find the next token(everything up to end or next blank). */
- if (**argptr
- && strchr (get_gdb_completer_quote_characters (),
- **argptr) != NULL)
- {
- p = skip_quoted (*argptr);
- *argptr = *argptr + 1;
- }
- else
+ const char *end;
+ char quote_char = *PARSER_STREAM (parser);
+
+ /* Special case: Ada operators. */
+ if (PARSER_STATE (parser)->language->la_language == language_ada
+ && quote_char == '\"')
+ {
+ int len = is_ada_operator (PARSER_STREAM (parser));
+
+ if (len != 0)
{
- p = *argptr;
- while (*p && *p != ' ' && *p != '\t' && *p != ',' && *p != ':')
- p++;
+ /* The input is an Ada operator. Return the quoted string
+ as-is. */
+ LS_TOKEN_STOKEN (token).ptr = PARSER_STREAM (parser);
+ LS_TOKEN_STOKEN (token).length = len;
+ PARSER_STREAM (parser) += len;
+ return token;
}
-/*
- q = operator_chars (*argptr, &q1);
- if (q1 - q)
- {
- char *opname;
- char *tmp = alloca (q1 - q + 1);
- memcpy (tmp, q, q1 - q);
- tmp[q1 - q] = '\0';
- opname = cplus_mangle_opname (tmp, DMGL_ANSI);
- if (opname == NULL)
- {
- cplusplus_error (saved_arg, "no mangling for \"%s\"\n", tmp);
- }
- copy = (char*) alloca (3 + strlen(opname));
- sprintf (copy, "__%s", opname);
- p = q1;
- }
- else
- */
- {
- copy = (char *) alloca (p - *argptr + 1);
- memcpy (copy, *argptr, p - *argptr);
- copy[p - *argptr] = '\0';
- if (p != *argptr
- && copy[p - *argptr - 1]
- && strchr (get_gdb_completer_quote_characters (),
- copy[p - *argptr - 1]) != NULL)
- copy[p - *argptr - 1] = '\0';
- }
- /* no line number may be specified */
- while (*p == ' ' || *p == '\t')
- p++;
- *argptr = p;
+ /* The input does not represent an Ada operator -- fall through
+ to normal quoted string handling. */
+ }
- sym = 0;
- i1 = 0; /* counter for the symbol array */
- sym_arr = (struct symbol **) alloca (total_number_of_methods (t)
- * sizeof (struct symbol *));
+ /* Skip past the beginning quote. */
+ ++(PARSER_STREAM (parser));
- if (destructor_name_p (copy, t))
- {
- /* Destructors are a special case. */
- int m_index, f_index;
+ /* Mark the start of the string. */
+ LS_TOKEN_STOKEN (token).ptr = PARSER_STREAM (parser);
- if (get_destructor_fn_field (t, &m_index, &f_index))
- {
- struct fn_field *f = TYPE_FN_FIELDLIST1 (t, m_index);
-
- sym_arr[i1] =
- lookup_symbol (TYPE_FN_FIELD_PHYSNAME (f, f_index),
- NULL, VAR_NAMESPACE, (int *) NULL,
- (struct symtab **) NULL);
- if (sym_arr[i1])
- i1++;
+ /* Skip to the ending quote. */
+ end = skip_quote_char (PARSER_STREAM (parser), quote_char);
+
+ /* This helps the completer mode decide whether we have a
+ complete string. */
+ parser->completion_quote_char = quote_char;
+ parser->completion_quote_end = end;
+
+ /* Error if the input did not terminate properly, unless in
+ completion mode. */
+ if (end == NULL)
+ {
+ if (parser->completion_tracker == NULL)
+ error (_("unmatched quote"));
+
+ /* In completion mode, we'll try to complete the incomplete
+ token. */
+ token.type = LSTOKEN_STRING;
+ while (*PARSER_STREAM (parser) != '\0')
+ PARSER_STREAM (parser)++;
+ LS_TOKEN_STOKEN (token).length = PARSER_STREAM (parser) - 1 - start;
+ }
+ else
+ {
+ /* Skip over the ending quote and mark the length of the string. */
+ PARSER_STREAM (parser) = (char *) ++end;
+ LS_TOKEN_STOKEN (token).length = PARSER_STREAM (parser) - 2 - start;
+ }
+ }
+ else
+ {
+ const char *p;
+
+ /* Otherwise, only identifier characters are permitted.
+ Spaces are the exception. In general, we keep spaces,
+ but only if the next characters in the input do not resolve
+ to one of the keywords.
+
+ This allows users to forgo quoting CV-qualifiers, template arguments,
+ and similar common language constructs. */
+
+ while (1)
+ {
+ if (isspace (*PARSER_STREAM (parser)))
+ {
+ p = skip_spaces (PARSER_STREAM (parser));
+ /* When we get here we know we've found something followed by
+ a space (we skip over parens and templates below).
+ So if we find a keyword now, we know it is a keyword and not,
+ say, a function name. */
+ if (linespec_lexer_lex_keyword (p) != NULL)
+ {
+ LS_TOKEN_STOKEN (token).ptr = start;
+ LS_TOKEN_STOKEN (token).length
+ = PARSER_STREAM (parser) - start;
+ return token;
+ }
+
+ /* Advance past the whitespace. */
+ PARSER_STREAM (parser) = p;
+ }
+
+ /* If the next character is EOI or (single) ':', the
+ string is complete; return the token. */
+ if (*PARSER_STREAM (parser) == 0)
+ {
+ LS_TOKEN_STOKEN (token).ptr = start;
+ LS_TOKEN_STOKEN (token).length = PARSER_STREAM (parser) - start;
+ return token;
+ }
+ else if (PARSER_STREAM (parser)[0] == ':')
+ {
+ /* Do not tokenize the C++ scope operator. */
+ if (PARSER_STREAM (parser)[1] == ':')
+ ++(PARSER_STREAM (parser));
+
+ /* Do not tokenize ABI tags such as "[abi:cxx11]". */
+ else if (PARSER_STREAM (parser) - start > 4
+ && startswith (PARSER_STREAM (parser) - 4, "[abi"))
+ ++(PARSER_STREAM (parser));
+
+ /* Do not tokenify if the input length so far is one
+ (i.e, a single-letter drive name) and the next character
+ is a directory separator. This allows Windows-style
+ paths to be recognized as filenames without quoting it. */
+ else if ((PARSER_STREAM (parser) - start) != 1
+ || !IS_DIR_SEPARATOR (PARSER_STREAM (parser)[1]))
+ {
+ LS_TOKEN_STOKEN (token).ptr = start;
+ LS_TOKEN_STOKEN (token).length
+ = PARSER_STREAM (parser) - start;
+ return token;
+ }
+ }
+ /* Special case: permit quote-enclosed linespecs. */
+ else if (parser->is_quote_enclosed
+ && strchr (linespec_quote_characters,
+ *PARSER_STREAM (parser))
+ && is_closing_quote_enclosed (PARSER_STREAM (parser)))
+ {
+ LS_TOKEN_STOKEN (token).ptr = start;
+ LS_TOKEN_STOKEN (token).length = PARSER_STREAM (parser) - start;
+ return token;
+ }
+ /* Because commas may terminate a linespec and appear in
+ the middle of valid string input, special cases for
+ '<' and '(' are necessary. */
+ else if (*PARSER_STREAM (parser) == '<'
+ || *PARSER_STREAM (parser) == '(')
+ {
+ /* Don't interpret 'operator<' / 'operator<<' as a
+ template parameter list though. */
+ if (*PARSER_STREAM (parser) == '<'
+ && (PARSER_STATE (parser)->language->la_language
+ == language_cplus)
+ && (PARSER_STREAM (parser) - start) >= CP_OPERATOR_LEN)
+ {
+ const char *op = PARSER_STREAM (parser);
+
+ while (op > start && isspace (op[-1]))
+ op--;
+ if (op - start >= CP_OPERATOR_LEN)
+ {
+ op -= CP_OPERATOR_LEN;
+ if (strncmp (op, CP_OPERATOR_STR, CP_OPERATOR_LEN) == 0
+ && (op == start
+ || !(isalnum (op[-1]) || op[-1] == '_')))
+ {
+ /* This is an operator name. Keep going. */
+ ++(PARSER_STREAM (parser));
+ if (*PARSER_STREAM (parser) == '<')
+ ++(PARSER_STREAM (parser));
+ continue;
+ }
+ }
+ }
+
+ const char *end = find_parameter_list_end (PARSER_STREAM (parser));
+ PARSER_STREAM (parser) = end;
+
+ /* Don't loop around to the normal \0 case above because
+ we don't want to misinterpret a potential keyword at
+ the end of the token when the string isn't
+ "()<>"-balanced. This handles "b
+ function(thread<tab>" in completion mode. */
+ if (*end == '\0')
+ {
+ LS_TOKEN_STOKEN (token).ptr = start;
+ LS_TOKEN_STOKEN (token).length
+ = PARSER_STREAM (parser) - start;
+ return token;
+ }
+ else
+ continue;
+ }
+ /* Commas are terminators, but not if they are part of an
+ operator name. */
+ else if (*PARSER_STREAM (parser) == ',')
+ {
+ if ((PARSER_STATE (parser)->language->la_language
+ == language_cplus)
+ && (PARSER_STREAM (parser) - start) > CP_OPERATOR_LEN)
+ {
+ const char *op = strstr (start, CP_OPERATOR_STR);
+
+ if (op != NULL && is_operator_name (op))
+ {
+ /* This is an operator name. Keep going. */
+ ++(PARSER_STREAM (parser));
+ continue;
+ }
}
+
+ /* Comma terminates the string. */
+ LS_TOKEN_STOKEN (token).ptr = start;
+ LS_TOKEN_STOKEN (token).length = PARSER_STREAM (parser) - start;
+ return token;
+ }
+
+ /* Advance the stream. */
+ ++(PARSER_STREAM (parser));
+ }
+ }
+
+ return token;
+}
+
+/* Lex a single linespec token from PARSER. */
+
+static linespec_token
+linespec_lexer_lex_one (linespec_parser *parser)
+{
+ const char *keyword;
+
+ if (parser->lexer.current.type == LSTOKEN_CONSUMED)
+ {
+ /* Skip any whitespace. */
+ PARSER_STREAM (parser) = skip_spaces (PARSER_STREAM (parser));
+
+ /* Check for a keyword, they end the linespec. */
+ keyword = linespec_lexer_lex_keyword (PARSER_STREAM (parser));
+ if (keyword != NULL)
+ {
+ parser->lexer.current.type = LSTOKEN_KEYWORD;
+ LS_TOKEN_KEYWORD (parser->lexer.current) = keyword;
+ /* We do not advance the stream here intentionally:
+ we would like lexing to stop when a keyword is seen.
+
+ PARSER_STREAM (parser) += strlen (keyword); */
+
+ return parser->lexer.current;
+ }
+
+ /* Handle other tokens. */
+ switch (*PARSER_STREAM (parser))
+ {
+ case 0:
+ parser->lexer.current.type = LSTOKEN_EOI;
+ break;
+
+ case '+': case '-':
+ case '0': case '1': case '2': case '3': case '4':
+ case '5': case '6': case '7': case '8': case '9':
+ if (!linespec_lexer_lex_number (parser, &(parser->lexer.current)))
+ parser->lexer.current = linespec_lexer_lex_string (parser);
+ break;
+
+ case ':':
+ /* If we have a scope operator, lex the input as a string.
+ Otherwise, return LSTOKEN_COLON. */
+ if (PARSER_STREAM (parser)[1] == ':')
+ parser->lexer.current = linespec_lexer_lex_string (parser);
+ else
+ {
+ parser->lexer.current.type = LSTOKEN_COLON;
+ ++(PARSER_STREAM (parser));
+ }
+ break;
+
+ case '\'': case '\"':
+ /* Special case: permit quote-enclosed linespecs. */
+ if (parser->is_quote_enclosed
+ && is_closing_quote_enclosed (PARSER_STREAM (parser)))
+ {
+ ++(PARSER_STREAM (parser));
+ parser->lexer.current.type = LSTOKEN_EOI;
}
else
- i1 = find_methods (t, copy, sym_arr);
- if (i1 == 1)
+ parser->lexer.current = linespec_lexer_lex_string (parser);
+ break;
+
+ case ',':
+ parser->lexer.current.type = LSTOKEN_COMMA;
+ LS_TOKEN_STOKEN (parser->lexer.current).ptr
+ = PARSER_STREAM (parser);
+ LS_TOKEN_STOKEN (parser->lexer.current).length = 1;
+ ++(PARSER_STREAM (parser));
+ break;
+
+ default:
+ /* If the input is not a number, it must be a string.
+ [Keywords were already considered above.] */
+ parser->lexer.current = linespec_lexer_lex_string (parser);
+ break;
+ }
+ }
+
+ return parser->lexer.current;
+}
+
+/* Consume the current token and return the next token in PARSER's
+ input stream. Also advance the completion word for completion
+ mode. */
+
+static linespec_token
+linespec_lexer_consume_token (linespec_parser *parser)
+{
+ gdb_assert (parser->lexer.current.type != LSTOKEN_EOI);
+
+ bool advance_word = (parser->lexer.current.type != LSTOKEN_STRING
+ || *PARSER_STREAM (parser) != '\0');
+
+ /* If we're moving past a string to some other token, it must be the
+ quote was terminated. */
+ if (parser->completion_quote_char)
+ {
+ gdb_assert (parser->lexer.current.type == LSTOKEN_STRING);
+
+ /* If the string was the last (non-EOI) token, we're past the
+ quote, but remember that for later. */
+ if (*PARSER_STREAM (parser) != '\0')
+ {
+ parser->completion_quote_char = '\0';
+ parser->completion_quote_end = NULL;;
+ }
+ }
+
+ parser->lexer.current.type = LSTOKEN_CONSUMED;
+ linespec_lexer_lex_one (parser);
+
+ if (parser->lexer.current.type == LSTOKEN_STRING)
+ {
+ /* Advance the completion word past a potential initial
+ quote-char. */
+ parser->completion_word = LS_TOKEN_STOKEN (parser->lexer.current).ptr;
+ }
+ else if (advance_word)
+ {
+ /* Advance the completion word past any whitespace. */
+ parser->completion_word = PARSER_STREAM (parser);
+ }
+
+ return parser->lexer.current;
+}
+
+/* Return the next token without consuming the current token. */
+
+static linespec_token
+linespec_lexer_peek_token (linespec_parser *parser)
+{
+ linespec_token next;
+ const char *saved_stream = PARSER_STREAM (parser);
+ linespec_token saved_token = parser->lexer.current;
+ int saved_completion_quote_char = parser->completion_quote_char;
+ const char *saved_completion_quote_end = parser->completion_quote_end;
+ const char *saved_completion_word = parser->completion_word;
+
+ next = linespec_lexer_consume_token (parser);
+ PARSER_STREAM (parser) = saved_stream;
+ parser->lexer.current = saved_token;
+ parser->completion_quote_char = saved_completion_quote_char;
+ parser->completion_quote_end = saved_completion_quote_end;
+ parser->completion_word = saved_completion_word;
+ return next;
+}
+
+/* Helper functions. */
+
+/* Add SAL to SALS, and also update SELF->CANONICAL_NAMES to reflect
+ the new sal, if needed. If not NULL, SYMNAME is the name of the
+ symbol to use when constructing the new canonical name.
+
+ If LITERAL_CANONICAL is non-zero, SYMNAME will be used as the
+ canonical name for the SAL. */
+
+static void
+add_sal_to_sals (struct linespec_state *self,
+ std::vector<symtab_and_line> *sals,
+ struct symtab_and_line *sal,
+ const char *symname, int literal_canonical)
+{
+ sals->push_back (*sal);
+
+ if (self->canonical)
+ {
+ struct linespec_canonical_name *canonical;
+
+ self->canonical_names = XRESIZEVEC (struct linespec_canonical_name,
+ self->canonical_names,
+ sals->size ());
+ canonical = &self->canonical_names[sals->size () - 1];
+ if (!literal_canonical && sal->symtab)
+ {
+ symtab_to_fullname (sal->symtab);
+
+ /* Note that the filter doesn't have to be a valid linespec
+ input. We only apply the ":LINE" treatment to Ada for
+ the time being. */
+ if (symname != NULL && sal->line != 0
+ && self->language->la_language == language_ada)
+ canonical->suffix = xstrprintf ("%s:%d", symname, sal->line);
+ else if (symname != NULL)
+ canonical->suffix = xstrdup (symname);
+ else
+ canonical->suffix = xstrprintf ("%d", sal->line);
+ canonical->symtab = sal->symtab;
+ }
+ else
+ {
+ if (symname != NULL)
+ canonical->suffix = xstrdup (symname);
+ else
+ canonical->suffix = xstrdup ("<unknown>");
+ canonical->symtab = NULL;
+ }
+ }
+}
+
+/* A hash function for address_entry. */
+
+static hashval_t
+hash_address_entry (const void *p)
+{
+ const struct address_entry *aep = (const struct address_entry *) p;
+ hashval_t hash;
+
+ hash = iterative_hash_object (aep->pspace, 0);
+ return iterative_hash_object (aep->addr, hash);
+}
+
+/* An equality function for address_entry. */
+
+static int
+eq_address_entry (const void *a, const void *b)
+{
+ const struct address_entry *aea = (const struct address_entry *) a;
+ const struct address_entry *aeb = (const struct address_entry *) b;
+
+ return aea->pspace == aeb->pspace && aea->addr == aeb->addr;
+}
+
+/* Check whether the address, represented by PSPACE and ADDR, is
+ already in the set. If so, return 0. Otherwise, add it and return
+ 1. */
+
+static int
+maybe_add_address (htab_t set, struct program_space *pspace, CORE_ADDR addr)
+{
+ struct address_entry e, *p;
+ void **slot;
+
+ e.pspace = pspace;
+ e.addr = addr;
+ slot = htab_find_slot (set, &e, INSERT);
+ if (*slot)
+ return 0;
+
+ p = XNEW (struct address_entry);
+ memcpy (p, &e, sizeof (struct address_entry));
+ *slot = p;
+
+ return 1;
+}
+
+/* A helper that walks over all matching symtabs in all objfiles and
+ calls CALLBACK for each symbol matching NAME. If SEARCH_PSPACE is
+ not NULL, then the search is restricted to just that program
+ space. If INCLUDE_INLINE is true then symbols representing
+ inlined instances of functions will be included in the result. */
+
+static void
+iterate_over_all_matching_symtabs
+ (struct linespec_state *state,
+ const lookup_name_info &lookup_name,
+ const domain_enum name_domain,
+ enum search_domain search_domain,
+ struct program_space *search_pspace, bool include_inline,
+ gdb::function_view<symbol_found_callback_ftype> callback)
+{
+ struct program_space *pspace;
+
+ ALL_PSPACES (pspace)
+ {
+ if (search_pspace != NULL && search_pspace != pspace)
+ continue;
+ if (pspace->executing_startup)
+ continue;
+
+ set_current_program_space (pspace);
+
+ for (objfile *objfile : all_objfiles (current_program_space))
+ {
+ if (objfile->sf)
+ objfile->sf->qf->expand_symtabs_matching (objfile,
+ NULL,
+ lookup_name,
+ NULL, NULL,
+ search_domain);
+
+ for (compunit_symtab *cu : objfile_compunits (objfile))
+ {
+ struct symtab *symtab = COMPUNIT_FILETABS (cu);
+
+ iterate_over_file_blocks (symtab, lookup_name, name_domain,
+ callback);
+
+ if (include_inline)
+ {
+ struct block *block;
+ int i;
+
+ for (i = FIRST_LOCAL_BLOCK;
+ i < BLOCKVECTOR_NBLOCKS (SYMTAB_BLOCKVECTOR (symtab));
+ i++)
+ {
+ block = BLOCKVECTOR_BLOCK (SYMTAB_BLOCKVECTOR (symtab), i);
+ state->language->la_iterate_over_symbols
+ (block, lookup_name, name_domain,
+ [&] (block_symbol *bsym)
+ {
+ /* Restrict calls to CALLBACK to symbols
+ representing inline symbols only. */
+ if (SYMBOL_INLINED (bsym->symbol))
+ return callback (bsym);
+ return true;
+ });
+ }
+ }
+ }
+ }
+ }
+}
+
+/* Returns the block to be used for symbol searches from
+ the current location. */
+
+static const struct block *
+get_current_search_block (void)
+{
+ const struct block *block;
+ enum language save_language;
+
+ /* get_selected_block can change the current language when there is
+ no selected frame yet. */
+ save_language = current_language->la_language;
+ block = get_selected_block (0);
+ set_language (save_language);
+
+ return block;
+}
+
+/* Iterate over static and global blocks. */
+
+static void
+iterate_over_file_blocks
+ (struct symtab *symtab, const lookup_name_info &name,
+ domain_enum domain, gdb::function_view<symbol_found_callback_ftype> callback)
+{
+ struct block *block;
+
+ for (block = BLOCKVECTOR_BLOCK (SYMTAB_BLOCKVECTOR (symtab), STATIC_BLOCK);
+ block != NULL;
+ block = BLOCK_SUPERBLOCK (block))
+ LA_ITERATE_OVER_SYMBOLS (block, name, domain, callback);
+}
+
+/* A helper for find_method. This finds all methods in type T of
+ language T_LANG which match NAME. It adds matching symbol names to
+ RESULT_NAMES, and adds T's direct superclasses to SUPERCLASSES. */
+
+static void
+find_methods (struct type *t, enum language t_lang, const char *name,
+ std::vector<const char *> *result_names,
+ std::vector<struct type *> *superclasses)
+{
+ int ibase;
+ const char *class_name = TYPE_NAME (t);
+
+ /* Ignore this class if it doesn't have a name. This is ugly, but
+ unless we figure out how to get the physname without the name of
+ the class, then the loop can't do any good. */
+ if (class_name)
+ {
+ int method_counter;
+ lookup_name_info lookup_name (name, symbol_name_match_type::FULL);
+ symbol_name_matcher_ftype *symbol_name_compare
+ = get_symbol_name_matcher (language_def (t_lang), lookup_name);
+
+ t = check_typedef (t);
+
+ /* Loop over each method name. At this level, all overloads of a name
+ are counted as a single name. There is an inner loop which loops over
+ each overload. */
+
+ for (method_counter = TYPE_NFN_FIELDS (t) - 1;
+ method_counter >= 0;
+ --method_counter)
+ {
+ const char *method_name = TYPE_FN_FIELDLIST_NAME (t, method_counter);
+
+ if (symbol_name_compare (method_name, lookup_name, NULL))
{
- /* There is exactly one field with that name. */
- sym = sym_arr[0];
+ int field_counter;
+
+ for (field_counter = (TYPE_FN_FIELDLIST_LENGTH (t, method_counter)
+ - 1);
+ field_counter >= 0;
+ --field_counter)
+ {
+ struct fn_field *f;
+ const char *phys_name;
+
+ f = TYPE_FN_FIELDLIST1 (t, method_counter);
+ if (TYPE_FN_FIELD_STUB (f, field_counter))
+ continue;
+ phys_name = TYPE_FN_FIELD_PHYSNAME (f, field_counter);
+ result_names->push_back (phys_name);
+ }
+ }
+ }
+ }
+
+ for (ibase = 0; ibase < TYPE_N_BASECLASSES (t); ibase++)
+ superclasses->push_back (TYPE_BASECLASS (t, ibase));
+}
+
+/* Find an instance of the character C in the string S that is outside
+ of all parenthesis pairs, single-quoted strings, and double-quoted
+ strings. Also, ignore the char within a template name, like a ','
+ within foo<int, int>, while considering C++ operator</operator<<. */
+
+const char *
+find_toplevel_char (const char *s, char c)
+{
+ int quoted = 0; /* zero if we're not in quotes;
+ '"' if we're in a double-quoted string;
+ '\'' if we're in a single-quoted string. */
+ int depth = 0; /* Number of unclosed parens we've seen. */
+ const char *scan;
+
+ for (scan = s; *scan; scan++)
+ {
+ if (quoted)
+ {
+ if (*scan == quoted)
+ quoted = 0;
+ else if (*scan == '\\' && *(scan + 1))
+ scan++;
+ }
+ else if (*scan == c && ! quoted && depth == 0)
+ return scan;
+ else if (*scan == '"' || *scan == '\'')
+ quoted = *scan;
+ else if (*scan == '(' || *scan == '<')
+ depth++;
+ else if ((*scan == ')' || *scan == '>') && depth > 0)
+ depth--;
+ else if (*scan == 'o' && !quoted && depth == 0)
+ {
+ /* Handle C++ operator names. */
+ if (strncmp (scan, CP_OPERATOR_STR, CP_OPERATOR_LEN) == 0)
+ {
+ scan += CP_OPERATOR_LEN;
+ if (*scan == c)
+ return scan;
+ while (isspace (*scan))
+ {
+ ++scan;
+ if (*scan == c)
+ return scan;
+ }
+ if (*scan == '\0')
+ break;
+
+ switch (*scan)
+ {
+ /* Skip over one less than the appropriate number of
+ characters: the for loop will skip over the last
+ one. */
+ case '<':
+ if (scan[1] == '<')
+ {
+ scan++;
+ if (*scan == c)
+ return scan;
+ }
+ break;
+ case '>':
+ if (scan[1] == '>')
+ {
+ scan++;
+ if (*scan == c)
+ return scan;
+ }
+ break;
+ }
+ }
+ }
+ }
+
+ return 0;
+}
+
+/* The string equivalent of find_toplevel_char. Returns a pointer
+ to the location of NEEDLE in HAYSTACK, ignoring any occurrences
+ inside "()" and "<>". Returns NULL if NEEDLE was not found. */
+
+static const char *
+find_toplevel_string (const char *haystack, const char *needle)
+{
+ const char *s = haystack;
+
+ do
+ {
+ s = find_toplevel_char (s, *needle);
+
+ if (s != NULL)
+ {
+ /* Found first char in HAYSTACK; check rest of string. */
+ if (startswith (s, needle))
+ return s;
+
+ /* Didn't find it; loop over HAYSTACK, looking for the next
+ instance of the first character of NEEDLE. */
+ ++s;
+ }
+ }
+ while (s != NULL && *s != '\0');
+
+ /* NEEDLE was not found in HAYSTACK. */
+ return NULL;
+}
+
+/* Convert CANONICAL to its string representation using
+ symtab_to_fullname for SYMTAB. */
+
+static std::string
+canonical_to_fullform (const struct linespec_canonical_name *canonical)
+{
+ if (canonical->symtab == NULL)
+ return canonical->suffix;
+ else
+ return string_printf ("%s:%s", symtab_to_fullname (canonical->symtab),
+ canonical->suffix);
+}
+
+/* Given FILTERS, a list of canonical names, filter the sals in RESULT
+ and store the result in SELF->CANONICAL. */
+
+static void
+filter_results (struct linespec_state *self,
+ std::vector<symtab_and_line> *result,
+ const std::vector<const char *> &filters)
+{
+ for (const char *name : filters)
+ {
+ linespec_sals lsal;
+
+ for (size_t j = 0; j < result->size (); ++j)
+ {
+ const struct linespec_canonical_name *canonical;
+
+ canonical = &self->canonical_names[j];
+ std::string fullform = canonical_to_fullform (canonical);
+
+ if (name == fullform)
+ lsal.sals.push_back ((*result)[j]);
+ }
+
+ if (!lsal.sals.empty ())
+ {
+ lsal.canonical = xstrdup (name);
+ self->canonical->lsals.push_back (std::move (lsal));
+ }
+ }
+
+ self->canonical->pre_expanded = 0;
+}
+
+/* Store RESULT into SELF->CANONICAL. */
+
+static void
+convert_results_to_lsals (struct linespec_state *self,
+ std::vector<symtab_and_line> *result)
+{
+ struct linespec_sals lsal;
+
+ lsal.canonical = NULL;
+ lsal.sals = std::move (*result);
+ self->canonical->lsals.push_back (std::move (lsal));
+}
+
+/* A structure that contains two string representations of a struct
+ linespec_canonical_name:
+ - one where the the symtab's fullname is used;
+ - one where the filename followed the "set filename-display"
+ setting. */
+
+struct decode_line_2_item
+{
+ decode_line_2_item (std::string &&fullform_, std::string &&displayform_,
+ bool selected_)
+ : fullform (std::move (fullform_)),
+ displayform (std::move (displayform_)),
+ selected (selected_)
+ {
+ }
+
+ /* The form using symtab_to_fullname. */
+ std::string fullform;
+
+ /* The form using symtab_to_filename_for_display. */
+ std::string displayform;
+
+ /* Field is initialized to zero and it is set to one if the user
+ requested breakpoint for this entry. */
+ unsigned int selected : 1;
+};
+
+/* Helper for std::sort to sort decode_line_2_item entries by
+ DISPLAYFORM and secondarily by FULLFORM. */
+
+static bool
+decode_line_2_compare_items (const decode_line_2_item &a,
+ const decode_line_2_item &b)
+{
+ if (a.displayform != b.displayform)
+ return a.displayform < b.displayform;
+ return a.fullform < b.fullform;
+}
+
+/* Handle multiple results in RESULT depending on SELECT_MODE. This
+ will either return normally, throw an exception on multiple
+ results, or present a menu to the user. On return, the SALS vector
+ in SELF->CANONICAL is set up properly. */
+
+static void
+decode_line_2 (struct linespec_state *self,
+ std::vector<symtab_and_line> *result,
+ const char *select_mode)
+{
+ char *args;
+ const char *prompt;
+ int i;
+ std::vector<const char *> filters;
+ std::vector<struct decode_line_2_item> items;
+
+ gdb_assert (select_mode != multiple_symbols_all);
+ gdb_assert (self->canonical != NULL);
+ gdb_assert (!result->empty ());
+
+ /* Prepare ITEMS array. */
+ for (i = 0; i < result->size (); ++i)
+ {
+ const struct linespec_canonical_name *canonical;
+ std::string displayform;
+
+ canonical = &self->canonical_names[i];
+ gdb_assert (canonical->suffix != NULL);
+
+ std::string fullform = canonical_to_fullform (canonical);
+
+ if (canonical->symtab == NULL)
+ displayform = canonical->suffix;
+ else
+ {
+ const char *fn_for_display;
+
+ fn_for_display = symtab_to_filename_for_display (canonical->symtab);
+ displayform = string_printf ("%s:%s", fn_for_display,
+ canonical->suffix);
+ }
+
+ items.emplace_back (std::move (fullform), std::move (displayform),
+ false);
+ }
+
+ /* Sort the list of method names. */
+ std::sort (items.begin (), items.end (), decode_line_2_compare_items);
+
+ /* Remove entries with the same FULLFORM. */
+ items.erase (std::unique (items.begin (), items.end (),
+ [] (const struct decode_line_2_item &a,
+ const struct decode_line_2_item &b)
+ {
+ return a.fullform == b.fullform;
+ }),
+ items.end ());
+
+ if (select_mode == multiple_symbols_cancel && items.size () > 1)
+ error (_("canceled because the command is ambiguous\n"
+ "See set/show multiple-symbol."));
+
+ if (select_mode == multiple_symbols_all || items.size () == 1)
+ {
+ convert_results_to_lsals (self, result);
+ return;
+ }
+
+ printf_unfiltered (_("[0] cancel\n[1] all\n"));
+ for (i = 0; i < items.size (); i++)
+ printf_unfiltered ("[%d] %s\n", i + 2, items[i].displayform.c_str ());
+
+ prompt = getenv ("PS2");
+ if (prompt == NULL)
+ {
+ prompt = "> ";
+ }
+ args = command_line_input (prompt, "overload-choice");
+
+ if (args == 0 || *args == 0)
+ error_no_arg (_("one or more choice numbers"));
+
+ number_or_range_parser parser (args);
+ while (!parser.finished ())
+ {
+ int num = parser.get_number ();
+
+ if (num == 0)
+ error (_("canceled"));
+ else if (num == 1)
+ {
+ /* We intentionally make this result in a single breakpoint,
+ contrary to what older versions of gdb did. The
+ rationale is that this lets a user get the
+ multiple_symbols_all behavior even with the 'ask'
+ setting; and he can get separate breakpoints by entering
+ "2-57" at the query. */
+ convert_results_to_lsals (self, result);
+ return;
+ }
+
+ num -= 2;
+ if (num >= items.size ())
+ printf_unfiltered (_("No choice number %d.\n"), num);
+ else
+ {
+ struct decode_line_2_item *item = &items[num];
+
+ if (!item->selected)
+ {
+ filters.push_back (item->fullform.c_str ());
+ item->selected = 1;
+ }
+ else
+ {
+ printf_unfiltered (_("duplicate request for %d ignored.\n"),
+ num + 2);
+ }
+ }
+ }
+
+ filter_results (self, result, filters);
+}
+
+\f
+
+/* The parser of linespec itself. */
+
+/* Throw an appropriate error when SYMBOL is not found (optionally in
+ FILENAME). */
+
+static void ATTRIBUTE_NORETURN
+symbol_not_found_error (const char *symbol, const char *filename)
+{
+ if (symbol == NULL)
+ symbol = "";
+
+ if (!have_full_symbols ()
+ && !have_partial_symbols ()
+ && !have_minimal_symbols ())
+ throw_error (NOT_FOUND_ERROR,
+ _("No symbol table is loaded. Use the \"file\" command."));
+
+ /* If SYMBOL starts with '$', the user attempted to either lookup
+ a function/variable in his code starting with '$' or an internal
+ variable of that name. Since we do not know which, be concise and
+ explain both possibilities. */
+ if (*symbol == '$')
+ {
+ if (filename)
+ throw_error (NOT_FOUND_ERROR,
+ _("Undefined convenience variable or function \"%s\" "
+ "not defined in \"%s\"."), symbol, filename);
+ else
+ throw_error (NOT_FOUND_ERROR,
+ _("Undefined convenience variable or function \"%s\" "
+ "not defined."), symbol);
+ }
+ else
+ {
+ if (filename)
+ throw_error (NOT_FOUND_ERROR,
+ _("Function \"%s\" not defined in \"%s\"."),
+ symbol, filename);
+ else
+ throw_error (NOT_FOUND_ERROR,
+ _("Function \"%s\" not defined."), symbol);
+ }
+}
+
+/* Throw an appropriate error when an unexpected token is encountered
+ in the input. */
+
+static void ATTRIBUTE_NORETURN
+unexpected_linespec_error (linespec_parser *parser)
+{
+ linespec_token token;
+ static const char * token_type_strings[]
+ = {"keyword", "colon", "string", "number", "comma", "end of input"};
+
+ /* Get the token that generated the error. */
+ token = linespec_lexer_lex_one (parser);
+
+ /* Finally, throw the error. */
+ if (token.type == LSTOKEN_STRING || token.type == LSTOKEN_NUMBER
+ || token.type == LSTOKEN_KEYWORD)
+ {
+ gdb::unique_xmalloc_ptr<char> string = copy_token_string (token);
+ throw_error (GENERIC_ERROR,
+ _("malformed linespec error: unexpected %s, \"%s\""),
+ token_type_strings[token.type], string.get ());
+ }
+ else
+ throw_error (GENERIC_ERROR,
+ _("malformed linespec error: unexpected %s"),
+ token_type_strings[token.type]);
+}
+
+/* Throw an undefined label error. */
+
+static void ATTRIBUTE_NORETURN
+undefined_label_error (const char *function, const char *label)
+{
+ if (function != NULL)
+ throw_error (NOT_FOUND_ERROR,
+ _("No label \"%s\" defined in function \"%s\"."),
+ label, function);
+ else
+ throw_error (NOT_FOUND_ERROR,
+ _("No label \"%s\" defined in current function."),
+ label);
+}
+
+/* Throw a source file not found error. */
+
+static void ATTRIBUTE_NORETURN
+source_file_not_found_error (const char *name)
+{
+ throw_error (NOT_FOUND_ERROR, _("No source file named %s."), name);
+}
+
+/* Unless at EIO, save the current stream position as completion word
+ point, and consume the next token. */
+
+static linespec_token
+save_stream_and_consume_token (linespec_parser *parser)
+{
+ if (linespec_lexer_peek_token (parser).type != LSTOKEN_EOI)
+ parser->completion_word = PARSER_STREAM (parser);
+ return linespec_lexer_consume_token (parser);
+}
+
+/* See description in linespec.h. */
+
+struct line_offset
+linespec_parse_line_offset (const char *string)
+{
+ const char *start = string;
+ struct line_offset line_offset = {0, LINE_OFFSET_NONE};
+
+ if (*string == '+')
+ {
+ line_offset.sign = LINE_OFFSET_PLUS;
+ ++string;
+ }
+ else if (*string == '-')
+ {
+ line_offset.sign = LINE_OFFSET_MINUS;
+ ++string;
+ }
+
+ if (*string != '\0' && !isdigit (*string))
+ error (_("malformed line offset: \"%s\""), start);
+
+ /* Right now, we only allow base 10 for offsets. */
+ line_offset.offset = atoi (string);
+ return line_offset;
+}
+
+/* In completion mode, if the user is still typing the number, there's
+ no possible completion to offer. But if there's already input past
+ the number, setup to expect NEXT. */
+
+static void
+set_completion_after_number (linespec_parser *parser,
+ linespec_complete_what next)
+{
+ if (*PARSER_STREAM (parser) == ' ')
+ {
+ parser->completion_word = skip_spaces (PARSER_STREAM (parser) + 1);
+ parser->complete_what = next;
+ }
+ else
+ {
+ parser->completion_word = PARSER_STREAM (parser);
+ parser->complete_what = linespec_complete_what::NOTHING;
+ }
+}
+
+/* Parse the basic_spec in PARSER's input. */
+
+static void
+linespec_parse_basic (linespec_parser *parser)
+{
+ gdb::unique_xmalloc_ptr<char> name;
+ linespec_token token;
+ std::vector<block_symbol> symbols;
+ std::vector<block_symbol> *labels;
+ std::vector<bound_minimal_symbol> minimal_symbols;
+
+ /* Get the next token. */
+ token = linespec_lexer_lex_one (parser);
+
+ /* If it is EOI or KEYWORD, issue an error. */
+ if (token.type == LSTOKEN_KEYWORD)
+ {
+ parser->complete_what = linespec_complete_what::NOTHING;
+ unexpected_linespec_error (parser);
+ }
+ else if (token.type == LSTOKEN_EOI)
+ {
+ unexpected_linespec_error (parser);
+ }
+ /* If it is a LSTOKEN_NUMBER, we have an offset. */
+ else if (token.type == LSTOKEN_NUMBER)
+ {
+ set_completion_after_number (parser, linespec_complete_what::KEYWORD);
+
+ /* Record the line offset and get the next token. */
+ name = copy_token_string (token);
+ PARSER_EXPLICIT (parser)->line_offset
+ = linespec_parse_line_offset (name.get ());
+
+ /* Get the next token. */
+ token = linespec_lexer_consume_token (parser);
+
+ /* If the next token is a comma, stop parsing and return. */
+ if (token.type == LSTOKEN_COMMA)
+ {
+ parser->complete_what = linespec_complete_what::NOTHING;
+ return;
+ }
+
+ /* If the next token is anything but EOI or KEYWORD, issue
+ an error. */
+ if (token.type != LSTOKEN_KEYWORD && token.type != LSTOKEN_EOI)
+ unexpected_linespec_error (parser);
+ }
+
+ if (token.type == LSTOKEN_KEYWORD || token.type == LSTOKEN_EOI)
+ return;
+
+ /* Next token must be LSTOKEN_STRING. */
+ if (token.type != LSTOKEN_STRING)
+ {
+ parser->complete_what = linespec_complete_what::NOTHING;
+ unexpected_linespec_error (parser);
+ }
+
+ /* The current token will contain the name of a function, method,
+ or label. */
+ name = copy_token_string (token);
+
+ if (parser->completion_tracker != NULL)
+ {
+ /* If the function name ends with a ":", then this may be an
+ incomplete "::" scope operator instead of a label separator.
+ E.g.,
+ "b klass:<tab>"
+ which should expand to:
+ "b klass::method()"
+
+ Do a tentative completion assuming the later. If we find
+ completions, advance the stream past the colon token and make
+ it part of the function name/token. */
+
+ if (!parser->completion_quote_char
+ && strcmp (PARSER_STREAM (parser), ":") == 0)
+ {
+ completion_tracker tmp_tracker;
+ const char *source_filename
+ = PARSER_EXPLICIT (parser)->source_filename;
+ symbol_name_match_type match_type
+ = PARSER_EXPLICIT (parser)->func_name_match_type;
+
+ linespec_complete_function (tmp_tracker,
+ parser->completion_word,
+ match_type,
+ source_filename);
+
+ if (tmp_tracker.have_completions ())
+ {
+ PARSER_STREAM (parser)++;
+ LS_TOKEN_STOKEN (token).length++;
+
+ name.reset (savestring (parser->completion_word,
+ (PARSER_STREAM (parser)
+ - parser->completion_word)));
+ }
+ }
+
+ PARSER_EXPLICIT (parser)->function_name = name.release ();
+ }
+ else
+ {
+ /* Try looking it up as a function/method. */
+ find_linespec_symbols (PARSER_STATE (parser),
+ PARSER_RESULT (parser)->file_symtabs, name.get (),
+ PARSER_EXPLICIT (parser)->func_name_match_type,
+ &symbols, &minimal_symbols);
+
+ if (!symbols.empty () || !minimal_symbols.empty ())
+ {
+ PARSER_RESULT (parser)->function_symbols
+ = new std::vector<block_symbol> (std::move (symbols));
+ PARSER_RESULT (parser)->minimal_symbols
+ = new std::vector<bound_minimal_symbol>
+ (std::move (minimal_symbols));
+ PARSER_EXPLICIT (parser)->function_name = name.release ();
+ }
+ else
+ {
+ /* NAME was not a function or a method. So it must be a label
+ name or user specified variable like "break foo.c:$zippo". */
+ labels = find_label_symbols (PARSER_STATE (parser), NULL,
+ &symbols, name.get ());
+ if (labels != NULL)
+ {
+ PARSER_RESULT (parser)->labels.label_symbols = labels;
+ PARSER_RESULT (parser)->labels.function_symbols
+ = new std::vector<block_symbol> (std::move (symbols));
+ PARSER_EXPLICIT (parser)->label_name = name.release ();
+ }
+ else if (token.type == LSTOKEN_STRING
+ && *LS_TOKEN_STOKEN (token).ptr == '$')
+ {
+ /* User specified a convenience variable or history value. */
+ PARSER_EXPLICIT (parser)->line_offset
+ = linespec_parse_variable (PARSER_STATE (parser), name.get ());
+
+ if (PARSER_EXPLICIT (parser)->line_offset.sign == LINE_OFFSET_UNKNOWN)
+ {
+ /* The user-specified variable was not valid. Do not
+ throw an error here. parse_linespec will do it for us. */
+ PARSER_EXPLICIT (parser)->function_name = name.release ();
+ return;
+ }
+ }
+ else
+ {
+ /* The name is also not a label. Abort parsing. Do not throw
+ an error here. parse_linespec will do it for us. */
+
+ /* Save a copy of the name we were trying to lookup. */
+ PARSER_EXPLICIT (parser)->function_name = name.release ();
+ return;
+ }
+ }
+ }
+
+ int previous_qc = parser->completion_quote_char;
+
+ /* Get the next token. */
+ token = linespec_lexer_consume_token (parser);
+
+ if (token.type == LSTOKEN_EOI)
+ {
+ if (previous_qc && !parser->completion_quote_char)
+ parser->complete_what = linespec_complete_what::KEYWORD;
+ }
+ else if (token.type == LSTOKEN_COLON)
+ {
+ /* User specified a label or a lineno. */
+ token = linespec_lexer_consume_token (parser);
+
+ if (token.type == LSTOKEN_NUMBER)
+ {
+ /* User specified an offset. Record the line offset and
+ get the next token. */
+ set_completion_after_number (parser, linespec_complete_what::KEYWORD);
+
+ name = copy_token_string (token);
+ PARSER_EXPLICIT (parser)->line_offset
+ = linespec_parse_line_offset (name.get ());
+
+ /* Get the next token. */
+ token = linespec_lexer_consume_token (parser);
+ }
+ else if (token.type == LSTOKEN_EOI && parser->completion_tracker != NULL)
+ {
+ parser->complete_what = linespec_complete_what::LABEL;
+ }
+ else if (token.type == LSTOKEN_STRING)
+ {
+ parser->complete_what = linespec_complete_what::LABEL;
+
+ /* If we have text after the label separated by whitespace
+ (e.g., "b func():lab i<tab>"), don't consider it part of
+ the label. In completion mode that should complete to
+ "if", in normal mode, the 'i' should be treated as
+ garbage. */
+ if (parser->completion_quote_char == '\0')
+ {
+ const char *ptr = LS_TOKEN_STOKEN (token).ptr;
+ for (size_t i = 0; i < LS_TOKEN_STOKEN (token).length; i++)
+ {
+ if (ptr[i] == ' ')
+ {
+ LS_TOKEN_STOKEN (token).length = i;
+ PARSER_STREAM (parser) = skip_spaces (ptr + i + 1);
+ break;
+ }
+ }
+ }
+
+ if (parser->completion_tracker != NULL)
+ {
+ if (PARSER_STREAM (parser)[-1] == ' ')
+ {
+ parser->completion_word = PARSER_STREAM (parser);
+ parser->complete_what = linespec_complete_what::KEYWORD;
+ }
+ }
+ else
+ {
+ /* Grab a copy of the label's name and look it up. */
+ name = copy_token_string (token);
+ labels
+ = find_label_symbols (PARSER_STATE (parser),
+ PARSER_RESULT (parser)->function_symbols,
+ &symbols, name.get ());
+
+ if (labels != NULL)
+ {
+ PARSER_RESULT (parser)->labels.label_symbols = labels;
+ PARSER_RESULT (parser)->labels.function_symbols
+ = new std::vector<block_symbol> (std::move (symbols));
+ PARSER_EXPLICIT (parser)->label_name = name.release ();
+ }
+ else
+ {
+ /* We don't know what it was, but it isn't a label. */
+ undefined_label_error
+ (PARSER_EXPLICIT (parser)->function_name, name.get ());
+ }
+
+ }
+
+ /* Check for a line offset. */
+ token = save_stream_and_consume_token (parser);
+ if (token.type == LSTOKEN_COLON)
+ {
+ /* Get the next token. */
+ token = linespec_lexer_consume_token (parser);
+
+ /* It must be a line offset. */
+ if (token.type != LSTOKEN_NUMBER)
+ unexpected_linespec_error (parser);
+
+ /* Record the line offset and get the next token. */
+ name = copy_token_string (token);
+
+ PARSER_EXPLICIT (parser)->line_offset
+ = linespec_parse_line_offset (name.get ());
+
+ /* Get the next token. */
+ token = linespec_lexer_consume_token (parser);
+ }
+ }
+ else
+ {
+ /* Trailing ':' in the input. Issue an error. */
+ unexpected_linespec_error (parser);
+ }
+ }
+}
+
+/* Canonicalize the linespec contained in LS. The result is saved into
+ STATE->canonical. This function handles both linespec and explicit
+ locations. */
+
+static void
+canonicalize_linespec (struct linespec_state *state, const linespec_p ls)
+{
+ struct event_location *canon;
+ struct explicit_location *explicit_loc;
+
+ /* If canonicalization was not requested, no need to do anything. */
+ if (!state->canonical)
+ return;
+
+ /* Save everything as an explicit location. */
+ state->canonical->location
+ = new_explicit_location (&ls->explicit_loc);
+ canon = state->canonical->location.get ();
+ explicit_loc = get_explicit_location (canon);
+
+ if (explicit_loc->label_name != NULL)
+ {
+ state->canonical->special_display = 1;
+
+ if (explicit_loc->function_name == NULL)
+ {
+ /* No function was specified, so add the symbol name. */
+ gdb_assert (!ls->labels.function_symbols->empty ()
+ && (ls->labels.function_symbols->size () == 1));
+ block_symbol s = ls->labels.function_symbols->front ();
+ explicit_loc->function_name
+ = xstrdup (SYMBOL_NATURAL_NAME (s.symbol));
+ }
+ }
+
+ /* If this location originally came from a linespec, save a string
+ representation of it for display and saving to file. */
+ if (state->is_linespec)
+ {
+ char *linespec = explicit_location_to_linespec (explicit_loc);
+
+ set_event_location_string (canon, linespec);
+ xfree (linespec);
+ }
+}
+
+/* Given a line offset in LS, construct the relevant SALs. */
+
+static std::vector<symtab_and_line>
+create_sals_line_offset (struct linespec_state *self,
+ linespec_p ls)
+{
+ int use_default = 0;
+
+ /* This is where we need to make sure we have good defaults.
+ We must guarantee that this section of code is never executed
+ when we are called with just a function name, since
+ set_default_source_symtab_and_line uses
+ select_source_symtab that calls us with such an argument. */
+
+ if (ls->file_symtabs->size () == 1
+ && ls->file_symtabs->front () == nullptr)
+ {
+ const char *fullname;
+
+ set_current_program_space (self->program_space);
+
+ /* Make sure we have at least a default source line. */
+ set_default_source_symtab_and_line ();
+ initialize_defaults (&self->default_symtab, &self->default_line);
+ fullname = symtab_to_fullname (self->default_symtab);
+ *ls->file_symtabs
+ = collect_symtabs_from_filename (fullname, self->search_pspace);
+ use_default = 1;
+ }
+
+ symtab_and_line val;
+ val.line = ls->explicit_loc.line_offset.offset;
+ switch (ls->explicit_loc.line_offset.sign)
+ {
+ case LINE_OFFSET_PLUS:
+ if (ls->explicit_loc.line_offset.offset == 0)
+ val.line = 5;
+ if (use_default)
+ val.line = self->default_line + val.line;
+ break;
+
+ case LINE_OFFSET_MINUS:
+ if (ls->explicit_loc.line_offset.offset == 0)
+ val.line = 15;
+ if (use_default)
+ val.line = self->default_line - val.line;
+ else
+ val.line = -val.line;
+ break;
+
+ case LINE_OFFSET_NONE:
+ break; /* No need to adjust val.line. */
+ }
+
+ std::vector<symtab_and_line> values;
+ if (self->list_mode)
+ values = decode_digits_list_mode (self, ls, val);
+ else
+ {
+ struct linetable_entry *best_entry = NULL;
+ int i, j;
+
+ std::vector<symtab_and_line> intermediate_results
+ = decode_digits_ordinary (self, ls, val.line, &best_entry);
+ if (intermediate_results.empty () && best_entry != NULL)
+ intermediate_results = decode_digits_ordinary (self, ls,
+ best_entry->line,
+ &best_entry);
+
+ /* For optimized code, the compiler can scatter one source line
+ across disjoint ranges of PC values, even when no duplicate
+ functions or inline functions are involved. For example,
+ 'for (;;)' inside a non-template, non-inline, and non-ctor-or-dtor
+ function can result in two PC ranges. In this case, we don't
+ want to set a breakpoint on the first PC of each range. To filter
+ such cases, we use containing blocks -- for each PC found
+ above, we see if there are other PCs that are in the same
+ block. If yes, the other PCs are filtered out. */
+
+ gdb::def_vector<int> filter (intermediate_results.size ());
+ gdb::def_vector<const block *> blocks (intermediate_results.size ());
+
+ for (i = 0; i < intermediate_results.size (); ++i)
+ {
+ set_current_program_space (intermediate_results[i].pspace);
+
+ filter[i] = 1;
+ blocks[i] = block_for_pc_sect (intermediate_results[i].pc,
+ intermediate_results[i].section);
+ }
+
+ for (i = 0; i < intermediate_results.size (); ++i)
+ {
+ if (blocks[i] != NULL)
+ for (j = i + 1; j < intermediate_results.size (); ++j)
+ {
+ if (blocks[j] == blocks[i])
+ {
+ filter[j] = 0;
+ break;
+ }
+ }
+ }
+
+ for (i = 0; i < intermediate_results.size (); ++i)
+ if (filter[i])
+ {
+ struct symbol *sym = (blocks[i]
+ ? block_containing_function (blocks[i])
+ : NULL);
+
+ if (self->funfirstline)
+ skip_prologue_sal (&intermediate_results[i]);
+ intermediate_results[i].symbol = sym;
+ add_sal_to_sals (self, &values, &intermediate_results[i],
+ sym ? SYMBOL_NATURAL_NAME (sym) : NULL, 0);
+ }
+ }
+
+ if (values.empty ())
+ {
+ if (ls->explicit_loc.source_filename)
+ throw_error (NOT_FOUND_ERROR, _("No line %d in file \"%s\"."),
+ val.line, ls->explicit_loc.source_filename);
+ else
+ throw_error (NOT_FOUND_ERROR, _("No line %d in the current file."),
+ val.line);
+ }
+
+ return values;
+}
+
+/* Convert the given ADDRESS into SaLs. */
+
+static std::vector<symtab_and_line>
+convert_address_location_to_sals (struct linespec_state *self,
+ CORE_ADDR address)
+{
+ symtab_and_line sal = find_pc_line (address, 0);
+ sal.pc = address;
+ sal.section = find_pc_overlay (address);
+ sal.explicit_pc = 1;
+ sal.symbol = find_pc_sect_containing_function (sal.pc, sal.section);
+
+ std::vector<symtab_and_line> sals;
+ add_sal_to_sals (self, &sals, &sal, core_addr_to_string (address), 1);
+
+ return sals;
+}
+
+/* Create and return SALs from the linespec LS. */
+
+static std::vector<symtab_and_line>
+convert_linespec_to_sals (struct linespec_state *state, linespec_p ls)
+{
+ std::vector<symtab_and_line> sals;
+
+ if (ls->labels.label_symbols != NULL)
+ {
+ /* We have just a bunch of functions/methods or labels. */
+ struct symtab_and_line sal;
+
+ for (const auto &sym : *ls->labels.label_symbols)
+ {
+ struct program_space *pspace
+ = SYMTAB_PSPACE (symbol_symtab (sym.symbol));
+
+ if (symbol_to_sal (&sal, state->funfirstline, sym.symbol)
+ && maybe_add_address (state->addr_set, pspace, sal.pc))
+ add_sal_to_sals (state, &sals, &sal,
+ SYMBOL_NATURAL_NAME (sym.symbol), 0);
+ }
+ }
+ else if (ls->function_symbols != NULL || ls->minimal_symbols != NULL)
+ {
+ /* We have just a bunch of functions and/or methods. */
+ if (ls->function_symbols != NULL)
+ {
+ /* Sort symbols so that symbols with the same program space are next
+ to each other. */
+ std::sort (ls->function_symbols->begin (),
+ ls->function_symbols->end (),
+ compare_symbols);
+
+ for (const auto &sym : *ls->function_symbols)
+ {
+ program_space *pspace
+ = SYMTAB_PSPACE (symbol_symtab (sym.symbol));
+ set_current_program_space (pspace);
+
+ /* Don't skip to the first line of the function if we
+ had found an ifunc minimal symbol for this function,
+ because that means that this function is an ifunc
+ resolver with the same name as the ifunc itself. */
+ bool found_ifunc = false;
+
+ if (state->funfirstline
+ && ls->minimal_symbols != NULL
+ && SYMBOL_CLASS (sym.symbol) == LOC_BLOCK)
+ {
+ const CORE_ADDR addr
+ = BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (sym.symbol));
+
+ for (const auto &elem : *ls->minimal_symbols)
+ {
+ if (MSYMBOL_TYPE (elem.minsym) == mst_text_gnu_ifunc
+ || MSYMBOL_TYPE (elem.minsym) == mst_data_gnu_ifunc)
+ {
+ CORE_ADDR msym_addr = BMSYMBOL_VALUE_ADDRESS (elem);
+ if (MSYMBOL_TYPE (elem.minsym) == mst_data_gnu_ifunc)
+ {
+ struct gdbarch *gdbarch
+ = get_objfile_arch (elem.objfile);
+ msym_addr
+ = (gdbarch_convert_from_func_ptr_addr
+ (gdbarch,
+ msym_addr,
+ current_top_target ()));
+ }
+
+ if (msym_addr == addr)
+ {
+ found_ifunc = true;
+ break;
+ }
+ }
+ }
+ }
+
+ if (!found_ifunc)
+ {
+ symtab_and_line sal;
+ if (symbol_to_sal (&sal, state->funfirstline, sym.symbol)
+ && maybe_add_address (state->addr_set, pspace, sal.pc))
+ add_sal_to_sals (state, &sals, &sal,
+ SYMBOL_NATURAL_NAME (sym.symbol), 0);
+ }
+ }
+ }
+
+ if (ls->minimal_symbols != NULL)
+ {
+ /* Sort minimal symbols by program space, too */
+ std::sort (ls->minimal_symbols->begin (),
+ ls->minimal_symbols->end (),
+ compare_msymbols);
+
+ for (const auto &elem : *ls->minimal_symbols)
+ {
+ program_space *pspace = elem.objfile->pspace;
+ set_current_program_space (pspace);
+ minsym_found (state, elem.objfile, elem.minsym, &sals);
+ }
+ }
+ }
+ else if (ls->explicit_loc.line_offset.sign != LINE_OFFSET_UNKNOWN)
+ {
+ /* Only an offset was specified. */
+ sals = create_sals_line_offset (state, ls);
+
+ /* Make sure we have a filename for canonicalization. */
+ if (ls->explicit_loc.source_filename == NULL)
+ {
+ const char *fullname = symtab_to_fullname (state->default_symtab);
+
+ /* It may be more appropriate to keep DEFAULT_SYMTAB in its symtab
+ form so that displaying SOURCE_FILENAME can follow the current
+ FILENAME_DISPLAY_STRING setting. But as it is used only rarely
+ it has been kept for code simplicity only in absolute form. */
+ ls->explicit_loc.source_filename = xstrdup (fullname);
+ }
+ }
+ else
+ {
+ /* We haven't found any results... */
+ return sals;
+ }
+
+ canonicalize_linespec (state, ls);
+
+ if (!sals.empty () && state->canonical != NULL)
+ state->canonical->pre_expanded = 1;
+
+ return sals;
+}
+
+/* Build RESULT from the explicit location components SOURCE_FILENAME,
+ FUNCTION_NAME, LABEL_NAME and LINE_OFFSET. */
+
+static void
+convert_explicit_location_to_linespec (struct linespec_state *self,
+ linespec_p result,
+ const char *source_filename,
+ const char *function_name,
+ symbol_name_match_type fname_match_type,
+ const char *label_name,
+ struct line_offset line_offset)
+{
+ std::vector<block_symbol> symbols;
+ std::vector<block_symbol> *labels;
+ std::vector<bound_minimal_symbol> minimal_symbols;
+
+ result->explicit_loc.func_name_match_type = fname_match_type;
+
+ if (source_filename != NULL)
+ {
+ TRY
+ {
+ *result->file_symtabs
+ = symtabs_from_filename (source_filename, self->search_pspace);
+ }
+ CATCH (except, RETURN_MASK_ERROR)
+ {
+ source_file_not_found_error (source_filename);
+ }
+ END_CATCH
+ result->explicit_loc.source_filename = xstrdup (source_filename);
+ }
+ else
+ {
+ /* A NULL entry means to use the default symtab. */
+ result->file_symtabs->push_back (nullptr);
+ }
+
+ if (function_name != NULL)
+ {
+ find_linespec_symbols (self, result->file_symtabs,
+ function_name, fname_match_type,
+ &symbols, &minimal_symbols);
+
+ if (symbols.empty () && minimal_symbols.empty ())
+ symbol_not_found_error (function_name,
+ result->explicit_loc.source_filename);
+
+ result->explicit_loc.function_name = xstrdup (function_name);
+ result->function_symbols
+ = new std::vector<block_symbol> (std::move (symbols));
+ result->minimal_symbols
+ = new std::vector<bound_minimal_symbol> (std::move (minimal_symbols));
+ }
+
+ if (label_name != NULL)
+ {
+ labels = find_label_symbols (self, result->function_symbols,
+ &symbols, label_name);
+
+ if (labels == NULL)
+ undefined_label_error (result->explicit_loc.function_name,
+ label_name);
+
+ result->explicit_loc.label_name = xstrdup (label_name);
+ result->labels.label_symbols = labels;
+ result->labels.function_symbols
+ = new std::vector<block_symbol> (std::move (symbols));
+ }
+
+ if (line_offset.sign != LINE_OFFSET_UNKNOWN)
+ result->explicit_loc.line_offset = line_offset;
+}
+
+/* Convert the explicit location EXPLICIT_LOC into SaLs. */
+
+static std::vector<symtab_and_line>
+convert_explicit_location_to_sals (struct linespec_state *self,
+ linespec_p result,
+ const struct explicit_location *explicit_loc)
+{
+ convert_explicit_location_to_linespec (self, result,
+ explicit_loc->source_filename,
+ explicit_loc->function_name,
+ explicit_loc->func_name_match_type,
+ explicit_loc->label_name,
+ explicit_loc->line_offset);
+ return convert_linespec_to_sals (self, result);
+}
+
+/* Parse a string that specifies a linespec.
+
+ The basic grammar of linespecs:
+
+ linespec -> var_spec | basic_spec
+ var_spec -> '$' (STRING | NUMBER)
+
+ basic_spec -> file_offset_spec | function_spec | label_spec
+ file_offset_spec -> opt_file_spec offset_spec
+ function_spec -> opt_file_spec function_name_spec opt_label_spec
+ label_spec -> label_name_spec
+
+ opt_file_spec -> "" | file_name_spec ':'
+ opt_label_spec -> "" | ':' label_name_spec
+
+ file_name_spec -> STRING
+ function_name_spec -> STRING
+ label_name_spec -> STRING
+ function_name_spec -> STRING
+ offset_spec -> NUMBER
+ -> '+' NUMBER
+ -> '-' NUMBER
+
+ This may all be followed by several keywords such as "if EXPR",
+ which we ignore.
+
+ A comma will terminate parsing.
+
+ The function may be an undebuggable function found in minimal symbol table.
+
+ If the argument FUNFIRSTLINE is nonzero, we want the first line
+ of real code inside a function when a function is specified, and it is
+ not OK to specify a variable or type to get its line number.
+
+ DEFAULT_SYMTAB specifies the file to use if none is specified.
+ It defaults to current_source_symtab.
+ DEFAULT_LINE specifies the line number to use for relative
+ line numbers (that start with signs). Defaults to current_source_line.
+ If CANONICAL is non-NULL, store an array of strings containing the canonical
+ line specs there if necessary. Currently overloaded member functions and
+ line numbers or static functions without a filename yield a canonical
+ line spec. The array and the line spec strings are allocated on the heap,
+ it is the callers responsibility to free them.
+
+ Note that it is possible to return zero for the symtab
+ if no file is validly specified. Callers must check that.
+ Also, the line number returned may be invalid. */
+
+/* Parse the linespec in ARG. MATCH_TYPE indicates how function names
+ should be matched. */
+
+static std::vector<symtab_and_line>
+parse_linespec (linespec_parser *parser, const char *arg,
+ symbol_name_match_type match_type)
+{
+ linespec_token token;
+ struct gdb_exception file_exception = exception_none;
+
+ /* A special case to start. It has become quite popular for
+ IDEs to work around bugs in the previous parser by quoting
+ the entire linespec, so we attempt to deal with this nicely. */
+ parser->is_quote_enclosed = 0;
+ if (parser->completion_tracker == NULL
+ && !is_ada_operator (arg)
+ && strchr (linespec_quote_characters, *arg) != NULL)
+ {
+ const char *end;
+
+ end = skip_quote_char (arg + 1, *arg);
+ if (end != NULL && is_closing_quote_enclosed (end))
+ {
+ /* Here's the special case. Skip ARG past the initial
+ quote. */
+ ++arg;
+ parser->is_quote_enclosed = 1;
+ }
+ }
+
+ parser->lexer.saved_arg = arg;
+ parser->lexer.stream = arg;
+ parser->completion_word = arg;
+ parser->complete_what = linespec_complete_what::FUNCTION;
+ PARSER_EXPLICIT (parser)->func_name_match_type = match_type;
+
+ /* Initialize the default symtab and line offset. */
+ initialize_defaults (&PARSER_STATE (parser)->default_symtab,
+ &PARSER_STATE (parser)->default_line);
+
+ /* Objective-C shortcut. */
+ if (parser->completion_tracker == NULL)
+ {
+ std::vector<symtab_and_line> values
+ = decode_objc (PARSER_STATE (parser), PARSER_RESULT (parser), arg);
+ if (!values.empty ())
+ return values;
+ }
+ else
+ {
+ /* "-"/"+" is either an objc selector, or a number. There's
+ nothing to complete the latter to, so just let the caller
+ complete on functions, which finds objc selectors, if there's
+ any. */
+ if ((arg[0] == '-' || arg[0] == '+') && arg[1] == '\0')
+ return {};
+ }
+
+ /* Start parsing. */
+
+ /* Get the first token. */
+ token = linespec_lexer_consume_token (parser);
+
+ /* It must be either LSTOKEN_STRING or LSTOKEN_NUMBER. */
+ if (token.type == LSTOKEN_STRING && *LS_TOKEN_STOKEN (token).ptr == '$')
+ {
+ /* A NULL entry means to use GLOBAL_DEFAULT_SYMTAB. */
+ if (parser->completion_tracker == NULL)
+ PARSER_RESULT (parser)->file_symtabs->push_back (nullptr);
+
+ /* User specified a convenience variable or history value. */
+ gdb::unique_xmalloc_ptr<char> var = copy_token_string (token);
+ PARSER_EXPLICIT (parser)->line_offset
+ = linespec_parse_variable (PARSER_STATE (parser), var.get ());
+
+ /* If a line_offset wasn't found (VAR is the name of a user
+ variable/function), then skip to normal symbol processing. */
+ if (PARSER_EXPLICIT (parser)->line_offset.sign != LINE_OFFSET_UNKNOWN)
+ {
+ /* Consume this token. */
+ linespec_lexer_consume_token (parser);
+
+ goto convert_to_sals;
+ }
+ }
+ else if (token.type == LSTOKEN_EOI && parser->completion_tracker != NULL)
+ {
+ /* Let the default linespec_complete_what::FUNCTION kick in. */
+ unexpected_linespec_error (parser);
+ }
+ else if (token.type != LSTOKEN_STRING && token.type != LSTOKEN_NUMBER)
+ {
+ parser->complete_what = linespec_complete_what::NOTHING;
+ unexpected_linespec_error (parser);
+ }
+
+ /* Shortcut: If the next token is not LSTOKEN_COLON, we know that
+ this token cannot represent a filename. */
+ token = linespec_lexer_peek_token (parser);
+
+ if (token.type == LSTOKEN_COLON)
+ {
+ /* Get the current token again and extract the filename. */
+ token = linespec_lexer_lex_one (parser);
+ gdb::unique_xmalloc_ptr<char> user_filename = copy_token_string (token);
+
+ /* Check if the input is a filename. */
+ TRY
+ {
+ *PARSER_RESULT (parser)->file_symtabs
+ = symtabs_from_filename (user_filename.get (),
+ PARSER_STATE (parser)->search_pspace);
+ }
+ CATCH (ex, RETURN_MASK_ERROR)
+ {
+ file_exception = ex;
+ }
+ END_CATCH
+
+ if (file_exception.reason >= 0)
+ {
+ /* Symtabs were found for the file. Record the filename. */
+ PARSER_EXPLICIT (parser)->source_filename = user_filename.release ();
+
+ /* Get the next token. */
+ token = linespec_lexer_consume_token (parser);
+
+ /* This is LSTOKEN_COLON; consume it. */
+ linespec_lexer_consume_token (parser);
+ }
+ else
+ {
+ /* A NULL entry means to use GLOBAL_DEFAULT_SYMTAB. */
+ PARSER_RESULT (parser)->file_symtabs->push_back (nullptr);
+ }
+ }
+ /* If the next token is not EOI, KEYWORD, or COMMA, issue an error. */
+ else if (parser->completion_tracker == NULL
+ && (token.type != LSTOKEN_EOI && token.type != LSTOKEN_KEYWORD
+ && token.type != LSTOKEN_COMMA))
+ {
+ /* TOKEN is the _next_ token, not the one currently in the parser.
+ Consuming the token will give the correct error message. */
+ linespec_lexer_consume_token (parser);
+ unexpected_linespec_error (parser);
+ }
+ else
+ {
+ /* A NULL entry means to use GLOBAL_DEFAULT_SYMTAB. */
+ PARSER_RESULT (parser)->file_symtabs->push_back (nullptr);
+ }
+
+ /* Parse the rest of the linespec. */
+ linespec_parse_basic (parser);
+
+ if (parser->completion_tracker == NULL
+ && PARSER_RESULT (parser)->function_symbols == NULL
+ && PARSER_RESULT (parser)->labels.label_symbols == NULL
+ && PARSER_EXPLICIT (parser)->line_offset.sign == LINE_OFFSET_UNKNOWN
+ && PARSER_RESULT (parser)->minimal_symbols == NULL)
+ {
+ /* The linespec didn't parse. Re-throw the file exception if
+ there was one. */
+ if (file_exception.reason < 0)
+ throw_exception (file_exception);
+
+ /* Otherwise, the symbol is not found. */
+ symbol_not_found_error (PARSER_EXPLICIT (parser)->function_name,
+ PARSER_EXPLICIT (parser)->source_filename);
+ }
+
+ convert_to_sals:
+
+ /* Get the last token and record how much of the input was parsed,
+ if necessary. */
+ token = linespec_lexer_lex_one (parser);
+ if (token.type != LSTOKEN_EOI && token.type != LSTOKEN_KEYWORD)
+ unexpected_linespec_error (parser);
+ else if (token.type == LSTOKEN_KEYWORD)
+ {
+ /* Setup the completion word past the keyword. Lexing never
+ advances past a keyword automatically, so skip it
+ manually. */
+ parser->completion_word
+ = skip_spaces (skip_to_space (PARSER_STREAM (parser)));
+ parser->complete_what = linespec_complete_what::EXPRESSION;
+ }
+
+ /* Convert the data in PARSER_RESULT to SALs. */
+ if (parser->completion_tracker == NULL)
+ return convert_linespec_to_sals (PARSER_STATE (parser),
+ PARSER_RESULT (parser));
+
+ return {};
+}
+
+
+/* A constructor for linespec_state. */
+
+static void
+linespec_state_constructor (struct linespec_state *self,
+ int flags, const struct language_defn *language,
+ struct program_space *search_pspace,
+ struct symtab *default_symtab,
+ int default_line,
+ struct linespec_result *canonical)
+{
+ memset (self, 0, sizeof (*self));
+ self->language = language;
+ self->funfirstline = (flags & DECODE_LINE_FUNFIRSTLINE) ? 1 : 0;
+ self->list_mode = (flags & DECODE_LINE_LIST_MODE) ? 1 : 0;
+ self->search_pspace = search_pspace;
+ self->default_symtab = default_symtab;
+ self->default_line = default_line;
+ self->canonical = canonical;
+ self->program_space = current_program_space;
+ self->addr_set = htab_create_alloc (10, hash_address_entry, eq_address_entry,
+ xfree, xcalloc, xfree);
+ self->is_linespec = 0;
+}
+
+/* Initialize a new linespec parser. */
+
+linespec_parser::linespec_parser (int flags,
+ const struct language_defn *language,
+ struct program_space *search_pspace,
+ struct symtab *default_symtab,
+ int default_line,
+ struct linespec_result *canonical)
+{
+ lexer.current.type = LSTOKEN_CONSUMED;
+ PARSER_RESULT (this)->file_symtabs = new std::vector<symtab *> ();
+ PARSER_EXPLICIT (this)->func_name_match_type
+ = symbol_name_match_type::WILD;
+ PARSER_EXPLICIT (this)->line_offset.sign = LINE_OFFSET_UNKNOWN;
+ linespec_state_constructor (PARSER_STATE (this), flags, language,
+ search_pspace,
+ default_symtab, default_line, canonical);
+}
+
+/* A destructor for linespec_state. */
+
+static void
+linespec_state_destructor (struct linespec_state *self)
+{
+ htab_delete (self->addr_set);
+ xfree (self->canonical_names);
+}
+
+/* Delete a linespec parser. */
+
+linespec_parser::~linespec_parser ()
+{
+ xfree (PARSER_EXPLICIT (this)->source_filename);
+ xfree (PARSER_EXPLICIT (this)->label_name);
+ xfree (PARSER_EXPLICIT (this)->function_name);
+
+ delete PARSER_RESULT (this)->file_symtabs;
+ delete PARSER_RESULT (this)->function_symbols;
+ delete PARSER_RESULT (this)->minimal_symbols;
+ delete PARSER_RESULT (this)->labels.label_symbols;
+ delete PARSER_RESULT (this)->labels.function_symbols;
+
+ linespec_state_destructor (PARSER_STATE (this));
+}
+
+/* See description in linespec.h. */
+
+void
+linespec_lex_to_end (const char **stringp)
+{
+ linespec_token token;
+ const char *orig;
+
+ if (stringp == NULL || *stringp == NULL)
+ return;
+
+ linespec_parser parser (0, current_language, NULL, NULL, 0, NULL);
+ parser.lexer.saved_arg = *stringp;
+ PARSER_STREAM (&parser) = orig = *stringp;
+
+ do
+ {
+ /* Stop before any comma tokens; we need it to keep it
+ as the next token in the string. */
+ token = linespec_lexer_peek_token (&parser);
+ if (token.type == LSTOKEN_COMMA)
+ break;
+ token = linespec_lexer_consume_token (&parser);
+ }
+ while (token.type != LSTOKEN_EOI && token.type != LSTOKEN_KEYWORD);
+
+ *stringp += PARSER_STREAM (&parser) - orig;
+}
+
+/* See linespec.h. */
+
+void
+linespec_complete_function (completion_tracker &tracker,
+ const char *function,
+ symbol_name_match_type func_match_type,
+ const char *source_filename)
+{
+ complete_symbol_mode mode = complete_symbol_mode::LINESPEC;
+
+ if (source_filename != NULL)
+ {
+ collect_file_symbol_completion_matches (tracker, mode, func_match_type,
+ function, function, source_filename);
+ }
+ else
+ {
+ collect_symbol_completion_matches (tracker, mode, func_match_type,
+ function, function);
+
+ }
+}
+
+/* Helper for complete_linespec to simplify it. SOURCE_FILENAME is
+ only meaningful if COMPONENT is FUNCTION. */
+
+static void
+complete_linespec_component (linespec_parser *parser,
+ completion_tracker &tracker,
+ const char *text,
+ linespec_complete_what component,
+ const char *source_filename)
+{
+ if (component == linespec_complete_what::KEYWORD)
+ {
+ complete_on_enum (tracker, linespec_keywords, text, text);
+ }
+ else if (component == linespec_complete_what::EXPRESSION)
+ {
+ const char *word
+ = advance_to_expression_complete_word_point (tracker, text);
+ complete_expression (tracker, text, word);
+ }
+ else if (component == linespec_complete_what::FUNCTION)
+ {
+ completion_list fn_list;
+
+ symbol_name_match_type match_type
+ = PARSER_EXPLICIT (parser)->func_name_match_type;
+ linespec_complete_function (tracker, text, match_type, source_filename);
+ if (source_filename == NULL)
+ {
+ /* Haven't seen a source component, like in "b
+ file.c:function[TAB]". Maybe this wasn't a function, but
+ a filename instead, like "b file.[TAB]". */
+ fn_list = complete_source_filenames (text);
+ }
+
+ /* If we only have a single filename completion, append a ':' for
+ the user, since that's the only thing that can usefully follow
+ the filename. */
+ if (fn_list.size () == 1 && !tracker.have_completions ())
+ {
+ char *fn = fn_list[0].release ();
+
+ /* If we also need to append a quote char, it needs to be
+ appended before the ':'. Append it now, and make ':' the
+ new "quote" char. */
+ if (tracker.quote_char ())
+ {
+ char quote_char_str[2] = { (char) tracker.quote_char () };
+
+ fn = reconcat (fn, fn, quote_char_str, (char *) NULL);
+ tracker.set_quote_char (':');
+ }
+ else
+ fn = reconcat (fn, fn, ":", (char *) NULL);
+ fn_list[0].reset (fn);
+
+ /* Tell readline to skip appending a space. */
+ tracker.set_suppress_append_ws (true);
+ }
+ tracker.add_completions (std::move (fn_list));
+ }
+}
+
+/* Helper for linespec_complete_label. Find labels that match
+ LABEL_NAME in the function symbols listed in the PARSER, and add
+ them to the tracker. */
+
+static void
+complete_label (completion_tracker &tracker,
+ linespec_parser *parser,
+ const char *label_name)
+{
+ std::vector<block_symbol> label_function_symbols;
+ std::vector<block_symbol> *labels
+ = find_label_symbols (PARSER_STATE (parser),
+ PARSER_RESULT (parser)->function_symbols,
+ &label_function_symbols,
+ label_name, true);
+
+ if (labels != nullptr)
+ {
+ for (const auto &label : *labels)
+ {
+ char *match = xstrdup (SYMBOL_SEARCH_NAME (label.symbol));
+ tracker.add_completion (gdb::unique_xmalloc_ptr<char> (match));
+ }
+ delete labels;
+ }
+}
+
+/* See linespec.h. */
+
+void
+linespec_complete_label (completion_tracker &tracker,
+ const struct language_defn *language,
+ const char *source_filename,
+ const char *function_name,
+ symbol_name_match_type func_name_match_type,
+ const char *label_name)
+{
+ linespec_parser parser (0, language, NULL, NULL, 0, NULL);
+
+ line_offset unknown_offset = { 0, LINE_OFFSET_UNKNOWN };
+
+ TRY
+ {
+ convert_explicit_location_to_linespec (PARSER_STATE (&parser),
+ PARSER_RESULT (&parser),
+ source_filename,
+ function_name,
+ func_name_match_type,
+ NULL, unknown_offset);
+ }
+ CATCH (ex, RETURN_MASK_ERROR)
+ {
+ return;
+ }
+ END_CATCH
+
+ complete_label (tracker, &parser, label_name);
+}
+
+/* See description in linespec.h. */
+
+void
+linespec_complete (completion_tracker &tracker, const char *text,
+ symbol_name_match_type match_type)
+{
+ const char *orig = text;
+
+ linespec_parser parser (0, current_language, NULL, NULL, 0, NULL);
+ parser.lexer.saved_arg = text;
+ PARSER_EXPLICIT (&parser)->func_name_match_type = match_type;
+ PARSER_STREAM (&parser) = text;
+
+ parser.completion_tracker = &tracker;
+ PARSER_STATE (&parser)->is_linespec = 1;
+
+ /* Parse as much as possible. parser.completion_word will hold
+ furthest completion point we managed to parse to. */
+ TRY
+ {
+ parse_linespec (&parser, text, match_type);
+ }
+ CATCH (except, RETURN_MASK_ERROR)
+ {
+ }
+ END_CATCH
+
+ if (parser.completion_quote_char != '\0'
+ && parser.completion_quote_end != NULL
+ && parser.completion_quote_end[1] == '\0')
+ {
+ /* If completing a quoted string with the cursor right at
+ terminating quote char, complete the completion word without
+ interpretation, so that readline advances the cursor one
+ whitespace past the quote, even if there's no match. This
+ makes these cases behave the same:
+
+ before: "b function()"
+ after: "b function() "
+
+ before: "b 'function()'"
+ after: "b 'function()' "
+
+ and trusts the user in this case:
+
+ before: "b 'not_loaded_function_yet()'"
+ after: "b 'not_loaded_function_yet()' "
+ */
+ parser.complete_what = linespec_complete_what::NOTHING;
+ parser.completion_quote_char = '\0';
+
+ gdb::unique_xmalloc_ptr<char> text_copy
+ (xstrdup (parser.completion_word));
+ tracker.add_completion (std::move (text_copy));
+ }
+
+ tracker.set_quote_char (parser.completion_quote_char);
+
+ if (parser.complete_what == linespec_complete_what::LABEL)
+ {
+ parser.complete_what = linespec_complete_what::NOTHING;
+
+ const char *func_name = PARSER_EXPLICIT (&parser)->function_name;
+
+ std::vector<block_symbol> function_symbols;
+ std::vector<bound_minimal_symbol> minimal_symbols;
+ find_linespec_symbols (PARSER_STATE (&parser),
+ PARSER_RESULT (&parser)->file_symtabs,
+ func_name, match_type,
+ &function_symbols, &minimal_symbols);
+
+ PARSER_RESULT (&parser)->function_symbols
+ = new std::vector<block_symbol> (std::move (function_symbols));
+ PARSER_RESULT (&parser)->minimal_symbols
+ = new std::vector<bound_minimal_symbol> (std::move (minimal_symbols));
+
+ complete_label (tracker, &parser, parser.completion_word);
+ }
+ else if (parser.complete_what == linespec_complete_what::FUNCTION)
+ {
+ /* While parsing/lexing, we didn't know whether the completion
+ word completes to a unique function/source name already or
+ not.
+
+ E.g.:
+ "b function() <tab>"
+ may need to complete either to:
+ "b function() const"
+ or to:
+ "b function() if/thread/task"
+
+ Or, this:
+ "b foo t"
+ may need to complete either to:
+ "b foo template_fun<T>()"
+ with "foo" being the template function's return type, or to:
+ "b foo thread/task"
+
+ Or, this:
+ "b file<TAB>"
+ may need to complete either to a source file name:
+ "b file.c"
+ or this, also a filename, but a unique completion:
+ "b file.c:"
+ or to a function name:
+ "b file_function"
+
+ Address that by completing assuming source or function, and
+ seeing if we find a completion that matches exactly the
+ completion word. If so, then it must be a function (see note
+ below) and we advance the completion word to the end of input
+ and switch to KEYWORD completion mode.
+
+ Note: if we find a unique completion for a source filename,
+ then it won't match the completion word, because the LCD will
+ contain a trailing ':'. And if we're completing at or after
+ the ':', then complete_linespec_component won't try to
+ complete on source filenames. */
+
+ const char *word = parser.completion_word;
+
+ complete_linespec_component (&parser, tracker,
+ parser.completion_word,
+ linespec_complete_what::FUNCTION,
+ PARSER_EXPLICIT (&parser)->source_filename);
+
+ parser.complete_what = linespec_complete_what::NOTHING;
+
+ if (tracker.quote_char ())
+ {
+ /* The function/file name was not close-quoted, so this
+ can't be a keyword. Note: complete_linespec_component
+ may have swapped the original quote char for ':' when we
+ get here, but that still indicates the same. */
+ }
+ else if (!tracker.have_completions ())
+ {
+ size_t key_start;
+ size_t wordlen = strlen (parser.completion_word);
+
+ key_start
+ = string_find_incomplete_keyword_at_end (linespec_keywords,
+ parser.completion_word,
+ wordlen);
+
+ if (key_start != -1
+ || (wordlen > 0
+ && parser.completion_word[wordlen - 1] == ' '))
+ {
+ parser.completion_word += key_start;
+ parser.complete_what = linespec_complete_what::KEYWORD;
+ }
+ }
+ else if (tracker.completes_to_completion_word (word))
+ {
+ /* Skip the function and complete on keywords. */
+ parser.completion_word += strlen (word);
+ parser.complete_what = linespec_complete_what::KEYWORD;
+ tracker.discard_completions ();
+ }
+ }
+
+ tracker.advance_custom_word_point_by (parser.completion_word - orig);
+
+ complete_linespec_component (&parser, tracker,
+ parser.completion_word,
+ parser.complete_what,
+ PARSER_EXPLICIT (&parser)->source_filename);
+
+ /* If we're past the "filename:function:label:offset" linespec, and
+ didn't find any match, then assume the user might want to create
+ a pending breakpoint anyway and offer the keyword
+ completions. */
+ if (!parser.completion_quote_char
+ && (parser.complete_what == linespec_complete_what::FUNCTION
+ || parser.complete_what == linespec_complete_what::LABEL
+ || parser.complete_what == linespec_complete_what::NOTHING)
+ && !tracker.have_completions ())
+ {
+ const char *end
+ = parser.completion_word + strlen (parser.completion_word);
+
+ if (end > orig && end[-1] == ' ')
+ {
+ tracker.advance_custom_word_point_by (end - parser.completion_word);
+
+ complete_linespec_component (&parser, tracker, end,
+ linespec_complete_what::KEYWORD,
+ NULL);
+ }
+ }
+}
+
+/* A helper function for decode_line_full and decode_line_1 to
+ turn LOCATION into std::vector<symtab_and_line>. */
+
+static std::vector<symtab_and_line>
+event_location_to_sals (linespec_parser *parser,
+ const struct event_location *location)
+{
+ std::vector<symtab_and_line> result;
+
+ switch (event_location_type (location))
+ {
+ case LINESPEC_LOCATION:
+ {
+ PARSER_STATE (parser)->is_linespec = 1;
+ TRY
+ {
+ const linespec_location *ls = get_linespec_location (location);
+ result = parse_linespec (parser,
+ ls->spec_string, ls->match_type);
+ }
+ CATCH (except, RETURN_MASK_ERROR)
+ {
+ throw_exception (except);
+ }
+ END_CATCH
+ }
+ break;
+
+ case ADDRESS_LOCATION:
+ {
+ const char *addr_string = get_address_string_location (location);
+ CORE_ADDR addr = get_address_location (location);
+
+ if (addr_string != NULL)
+ {
+ addr = linespec_expression_to_pc (&addr_string);
+ if (PARSER_STATE (parser)->canonical != NULL)
+ PARSER_STATE (parser)->canonical->location
+ = copy_event_location (location);
+ }
+
+ result = convert_address_location_to_sals (PARSER_STATE (parser),
+ addr);
+ }
+ break;
+
+ case EXPLICIT_LOCATION:
+ {
+ const struct explicit_location *explicit_loc;
+
+ explicit_loc = get_explicit_location_const (location);
+ result = convert_explicit_location_to_sals (PARSER_STATE (parser),
+ PARSER_RESULT (parser),
+ explicit_loc);
+ }
+ break;
+
+ case PROBE_LOCATION:
+ /* Probes are handled by their own decoders. */
+ gdb_assert_not_reached ("attempt to decode probe location");
+ break;
+
+ default:
+ gdb_assert_not_reached ("unhandled event location type");
+ }
+
+ return result;
+}
+
+/* See linespec.h. */
+
+void
+decode_line_full (const struct event_location *location, int flags,
+ struct program_space *search_pspace,
+ struct symtab *default_symtab,
+ int default_line, struct linespec_result *canonical,
+ const char *select_mode,
+ const char *filter)
+{
+ std::vector<const char *> filters;
+ struct linespec_state *state;
+
+ gdb_assert (canonical != NULL);
+ /* The filter only makes sense for 'all'. */
+ gdb_assert (filter == NULL || select_mode == multiple_symbols_all);
+ gdb_assert (select_mode == NULL
+ || select_mode == multiple_symbols_all
+ || select_mode == multiple_symbols_ask
+ || select_mode == multiple_symbols_cancel);
+ gdb_assert ((flags & DECODE_LINE_LIST_MODE) == 0);
+
+ linespec_parser parser (flags, current_language,
+ search_pspace, default_symtab,
+ default_line, canonical);
+
+ scoped_restore_current_program_space restore_pspace;
+
+ std::vector<symtab_and_line> result = event_location_to_sals (&parser,
+ location);
+ state = PARSER_STATE (&parser);
+
+ gdb_assert (result.size () == 1 || canonical->pre_expanded);
+ canonical->pre_expanded = 1;
+
+ /* Arrange for allocated canonical names to be freed. */
+ std::vector<gdb::unique_xmalloc_ptr<char>> hold_names;
+ for (int i = 0; i < result.size (); ++i)
+ {
+ gdb_assert (state->canonical_names[i].suffix != NULL);
+ hold_names.emplace_back (state->canonical_names[i].suffix);
+ }
+
+ if (select_mode == NULL)
+ {
+ if (top_level_interpreter ()->interp_ui_out ()->is_mi_like_p ())
+ select_mode = multiple_symbols_all;
+ else
+ select_mode = multiple_symbols_select_mode ();
+ }
+
+ if (select_mode == multiple_symbols_all)
+ {
+ if (filter != NULL)
+ {
+ filters.push_back (filter);
+ filter_results (state, &result, filters);
+ }
+ else
+ convert_results_to_lsals (state, &result);
+ }
+ else
+ decode_line_2 (state, &result, select_mode);
+}
+
+/* See linespec.h. */
+
+std::vector<symtab_and_line>
+decode_line_1 (const struct event_location *location, int flags,
+ struct program_space *search_pspace,
+ struct symtab *default_symtab,
+ int default_line)
+{
+ linespec_parser parser (flags, current_language,
+ search_pspace, default_symtab,
+ default_line, NULL);
+
+ scoped_restore_current_program_space restore_pspace;
+
+ return event_location_to_sals (&parser, location);
+}
+
+/* See linespec.h. */
+
+std::vector<symtab_and_line>
+decode_line_with_current_source (const char *string, int flags)
+{
+ if (string == 0)
+ error (_("Empty line specification."));
+
+ /* We use whatever is set as the current source line. We do not try
+ and get a default source symtab+line or it will recursively call us! */
+ symtab_and_line cursal = get_current_source_symtab_and_line ();
+
+ event_location_up location = string_to_event_location (&string,
+ current_language);
+ std::vector<symtab_and_line> sals
+ = decode_line_1 (location.get (), flags, NULL, cursal.symtab, cursal.line);
+
+ if (*string)
+ error (_("Junk at end of line specification: %s"), string);
+
+ return sals;
+}
+
+/* See linespec.h. */
+
+std::vector<symtab_and_line>
+decode_line_with_last_displayed (const char *string, int flags)
+{
+ if (string == 0)
+ error (_("Empty line specification."));
+
+ event_location_up location = string_to_event_location (&string,
+ current_language);
+ std::vector<symtab_and_line> sals
+ = (last_displayed_sal_is_valid ()
+ ? decode_line_1 (location.get (), flags, NULL,
+ get_last_displayed_symtab (),
+ get_last_displayed_line ())
+ : decode_line_1 (location.get (), flags, NULL,
+ (struct symtab *) NULL, 0));
+
+ if (*string)
+ error (_("Junk at end of line specification: %s"), string);
+
+ return sals;
+}
+
+\f
+
+/* First, some functions to initialize stuff at the beggining of the
+ function. */
+
+static void
+initialize_defaults (struct symtab **default_symtab, int *default_line)
+{
+ if (*default_symtab == 0)
+ {
+ /* Use whatever we have for the default source line. We don't use
+ get_current_or_default_symtab_and_line as it can recurse and call
+ us back! */
+ struct symtab_and_line cursal =
+ get_current_source_symtab_and_line ();
+
+ *default_symtab = cursal.symtab;
+ *default_line = cursal.line;
+ }
+}
+
+\f
+
+/* Evaluate the expression pointed to by EXP_PTR into a CORE_ADDR,
+ advancing EXP_PTR past any parsed text. */
+
+CORE_ADDR
+linespec_expression_to_pc (const char **exp_ptr)
+{
+ if (current_program_space->executing_startup)
+ /* The error message doesn't really matter, because this case
+ should only hit during breakpoint reset. */
+ throw_error (NOT_FOUND_ERROR, _("cannot evaluate expressions while "
+ "program space is in startup"));
+
+ (*exp_ptr)++;
+ return value_as_address (parse_to_comma_and_eval (exp_ptr));
+}
+
+\f
+
+/* Here's where we recognise an Objective-C Selector. An Objective C
+ selector may be implemented by more than one class, therefore it
+ may represent more than one method/function. This gives us a
+ situation somewhat analogous to C++ overloading. If there's more
+ than one method that could represent the selector, then use some of
+ the existing C++ code to let the user choose one. */
+
+static std::vector<symtab_and_line>
+decode_objc (struct linespec_state *self, linespec_p ls, const char *arg)
+{
+ struct collect_info info;
+ std::vector<const char *> symbol_names;
+ const char *new_argptr;
+
+ info.state = self;
+ std::vector<symtab *> symtabs;
+ symtabs.push_back (nullptr);
+
+ info.file_symtabs = &symtabs;
+
+ std::vector<block_symbol> symbols;
+ info.result.symbols = &symbols;
+ std::vector<bound_minimal_symbol> minimal_symbols;
+ info.result.minimal_symbols = &minimal_symbols;
+
+ new_argptr = find_imps (arg, &symbol_names);
+ if (symbol_names.empty ())
+ return {};
+
+ add_all_symbol_names_from_pspace (&info, NULL, symbol_names,
+ FUNCTIONS_DOMAIN);
+
+ std::vector<symtab_and_line> values;
+ if (!symbols.empty () || !minimal_symbols.empty ())
+ {
+ char *saved_arg;
+
+ saved_arg = (char *) alloca (new_argptr - arg + 1);
+ memcpy (saved_arg, arg, new_argptr - arg);
+ saved_arg[new_argptr - arg] = '\0';
+
+ ls->explicit_loc.function_name = xstrdup (saved_arg);
+ ls->function_symbols
+ = new std::vector<block_symbol> (std::move (symbols));
+ ls->minimal_symbols
+ = new std::vector<bound_minimal_symbol> (std::move (minimal_symbols));
+ values = convert_linespec_to_sals (self, ls);
+
+ if (self->canonical)
+ {
+ std::string holder;
+ const char *str;
+
+ self->canonical->pre_expanded = 1;
+
+ if (ls->explicit_loc.source_filename)
+ {
+ holder = string_printf ("%s:%s",
+ ls->explicit_loc.source_filename,
+ saved_arg);
+ str = holder.c_str ();
+ }
+ else
+ str = saved_arg;
+
+ self->canonical->location
+ = new_linespec_location (&str, symbol_name_match_type::FULL);
+ }
+ }
+
+ return values;
+}
+
+namespace {
+
+/* A function object that serves as symbol_found_callback_ftype
+ callback for iterate_over_symbols. This is used by
+ lookup_prefix_sym to collect type symbols. */
+class decode_compound_collector
+{
+public:
+ decode_compound_collector ()
+ {
+ m_unique_syms = htab_create_alloc (1, htab_hash_pointer,
+ htab_eq_pointer, NULL,
+ xcalloc, xfree);
+ }
+
+ ~decode_compound_collector ()
+ {
+ if (m_unique_syms != NULL)
+ htab_delete (m_unique_syms);
+ }
+
+ /* Return all symbols collected. */
+ std::vector<block_symbol> release_symbols ()
+ {
+ return std::move (m_symbols);
+ }
+
+ /* Callable as a symbol_found_callback_ftype callback. */
+ bool operator () (block_symbol *bsym);
+
+private:
+ /* A hash table of all symbols we found. We use this to avoid
+ adding any symbol more than once. */
+ htab_t m_unique_syms;
+
+ /* The result vector. */
+ std::vector<block_symbol> m_symbols;
+};
+
+bool
+decode_compound_collector::operator () (block_symbol *bsym)
+{
+ void **slot;
+ struct type *t;
+ struct symbol *sym = bsym->symbol;
+
+ if (SYMBOL_CLASS (sym) != LOC_TYPEDEF)
+ return true; /* Continue iterating. */
+
+ t = SYMBOL_TYPE (sym);
+ t = check_typedef (t);
+ if (TYPE_CODE (t) != TYPE_CODE_STRUCT
+ && TYPE_CODE (t) != TYPE_CODE_UNION
+ && TYPE_CODE (t) != TYPE_CODE_NAMESPACE)
+ return true; /* Continue iterating. */
+
+ slot = htab_find_slot (m_unique_syms, sym, INSERT);
+ if (!*slot)
+ {
+ *slot = sym;
+ m_symbols.push_back (*bsym);
+ }
+
+ return true; /* Continue iterating. */
+}
+
+} // namespace
+
+/* Return any symbols corresponding to CLASS_NAME in FILE_SYMTABS. */
+
+static std::vector<block_symbol>
+lookup_prefix_sym (struct linespec_state *state,
+ std::vector<symtab *> *file_symtabs,
+ const char *class_name)
+{
+ decode_compound_collector collector;
+
+ lookup_name_info lookup_name (class_name, symbol_name_match_type::FULL);
+
+ for (const auto &elt : *file_symtabs)
+ {
+ if (elt == nullptr)
+ {
+ iterate_over_all_matching_symtabs (state, lookup_name,
+ STRUCT_DOMAIN, ALL_DOMAIN,
+ NULL, false, collector);
+ iterate_over_all_matching_symtabs (state, lookup_name,
+ VAR_DOMAIN, ALL_DOMAIN,
+ NULL, false, collector);
+ }
+ else
+ {
+ /* Program spaces that are executing startup should have
+ been filtered out earlier. */
+ gdb_assert (!SYMTAB_PSPACE (elt)->executing_startup);
+ set_current_program_space (SYMTAB_PSPACE (elt));
+ iterate_over_file_blocks (elt, lookup_name, STRUCT_DOMAIN, collector);
+ iterate_over_file_blocks (elt, lookup_name, VAR_DOMAIN, collector);
+ }
+ }
+
+ return collector.release_symbols ();
+}
+
+/* A std::sort comparison function for symbols. The resulting order does
+ not actually matter; we just need to be able to sort them so that
+ symbols with the same program space end up next to each other. */
+
+static bool
+compare_symbols (const block_symbol &a, const block_symbol &b)
+{
+ uintptr_t uia, uib;
+
+ uia = (uintptr_t) SYMTAB_PSPACE (symbol_symtab (a.symbol));
+ uib = (uintptr_t) SYMTAB_PSPACE (symbol_symtab (b.symbol));
+
+ if (uia < uib)
+ return true;
+ if (uia > uib)
+ return false;
+
+ uia = (uintptr_t) a.symbol;
+ uib = (uintptr_t) b.symbol;
+
+ if (uia < uib)
+ return true;
+
+ return false;
+}
+
+/* Like compare_symbols but for minimal symbols. */
+
+static bool
+compare_msymbols (const bound_minimal_symbol &a, const bound_minimal_symbol &b)
+{
+ uintptr_t uia, uib;
+
+ uia = (uintptr_t) a.objfile->pspace;
+ uib = (uintptr_t) a.objfile->pspace;
+
+ if (uia < uib)
+ return true;
+ if (uia > uib)
+ return false;
+
+ uia = (uintptr_t) a.minsym;
+ uib = (uintptr_t) b.minsym;
+
+ if (uia < uib)
+ return true;
+
+ return false;
+}
+
+/* Look for all the matching instances of each symbol in NAMES. Only
+ instances from PSPACE are considered; other program spaces are
+ handled by our caller. If PSPACE is NULL, then all program spaces
+ are considered. Results are stored into INFO. */
+
+static void
+add_all_symbol_names_from_pspace (struct collect_info *info,
+ struct program_space *pspace,
+ const std::vector<const char *> &names,
+ enum search_domain search_domain)
+{
+ for (const char *iter : names)
+ add_matching_symbols_to_info (iter,
+ symbol_name_match_type::FULL,
+ search_domain, info, pspace);
+}
+
+static void
+find_superclass_methods (std::vector<struct type *> &&superclasses,
+ const char *name, enum language name_lang,
+ std::vector<const char *> *result_names)
+{
+ size_t old_len = result_names->size ();
+
+ while (1)
+ {
+ std::vector<struct type *> new_supers;
- if (sym && SYMBOL_CLASS (sym) == LOC_BLOCK)
- {
- values.sals = (struct symtab_and_line *)
- xmalloc (sizeof (struct symtab_and_line));
- values.nelts = 1;
- values.sals[0] = find_function_start_sal (sym,
- funfirstline);
- }
- else
- {
- values.nelts = 0;
- }
- return values;
- }
- if (i1 > 0)
- {
- /* There is more than one field with that name
- (overloaded). Ask the user which one to use. */
- return decode_line_2 (sym_arr, i1, funfirstline, canonical);
- }
- else
- {
- char *tmp;
+ for (type *t : superclasses)
+ find_methods (t, name_lang, name, result_names, &new_supers);
- if (is_operator_name (copy))
- {
- tmp = (char *) alloca (strlen (copy + 3) + 9);
- strcpy (tmp, "operator ");
- strcat (tmp, copy + 3);
- }
- else
- tmp = copy;
- if (tmp[0] == '~')
- cplusplus_error (saved_arg,
- "the class `%s' does not have destructor defined\n",
- SYMBOL_SOURCE_NAME (sym_class));
- else
- cplusplus_error (saved_arg,
- "the class %s does not have any method named %s\n",
- SYMBOL_SOURCE_NAME (sym_class), tmp);
- }
- }
+ if (result_names->size () != old_len || new_supers.empty ())
+ break;
+
+ superclasses = std::move (new_supers);
+ }
+}
- /* Move pointer up to next possible class/namespace token */
- p = p2 + 1; /* restart with old value +1 */
- /* Move pointer ahead to next double-colon */
- while (*p && (p[0] != ' ') && (p[0] != '\t') && (p[0] != '\''))
+/* This finds the method METHOD_NAME in the class CLASS_NAME whose type is
+ given by one of the symbols in SYM_CLASSES. Matches are returned
+ in SYMBOLS (for debug symbols) and MINSYMS (for minimal symbols). */
+
+static void
+find_method (struct linespec_state *self, std::vector<symtab *> *file_symtabs,
+ const char *class_name, const char *method_name,
+ std::vector<block_symbol> *sym_classes,
+ std::vector<block_symbol> *symbols,
+ std::vector<bound_minimal_symbol> *minsyms)
+{
+ size_t last_result_len;
+ std::vector<struct type *> superclass_vec;
+ std::vector<const char *> result_names;
+ struct collect_info info;
+
+ /* Sort symbols so that symbols with the same program space are next
+ to each other. */
+ std::sort (sym_classes->begin (), sym_classes->end (),
+ compare_symbols);
+
+ info.state = self;
+ info.file_symtabs = file_symtabs;
+ info.result.symbols = symbols;
+ info.result.minimal_symbols = minsyms;
+
+ /* Iterate over all the types, looking for the names of existing
+ methods matching METHOD_NAME. If we cannot find a direct method in a
+ given program space, then we consider inherited methods; this is
+ not ideal (ideal would be to respect C++ hiding rules), but it
+ seems good enough and is what GDB has historically done. We only
+ need to collect the names because later we find all symbols with
+ those names. This loop is written in a somewhat funny way
+ because we collect data across the program space before deciding
+ what to do. */
+ last_result_len = 0;
+ unsigned int ix = 0;
+ for (const auto &elt : *sym_classes)
+ {
+ struct type *t;
+ struct program_space *pspace;
+ struct symbol *sym = elt.symbol;
+
+ /* Program spaces that are executing startup should have
+ been filtered out earlier. */
+ pspace = SYMTAB_PSPACE (symbol_symtab (sym));
+ gdb_assert (!pspace->executing_startup);
+ set_current_program_space (pspace);
+ t = check_typedef (SYMBOL_TYPE (sym));
+ find_methods (t, SYMBOL_LANGUAGE (sym),
+ method_name, &result_names, &superclass_vec);
+
+ /* Handle all items from a single program space at once; and be
+ sure not to miss the last batch. */
+ if (ix == sym_classes->size () - 1
+ || (pspace
+ != SYMTAB_PSPACE (symbol_symtab (sym_classes->at (ix + 1).symbol))))
{
- if (p[0] == '<')
- {
- temp_end = find_template_name_end (p);
- if (!temp_end)
- error ("malformed template specification in command");
- p = temp_end;
- }
- else if ((p[0] == ':') && (p[1] == ':'))
- break; /* found double-colon */
- else
- p++;
- }
-
- if (*p != ':')
- break; /* out of the while (1) */
-
- p2 = p; /* save restart for next time around */
- *argptr = saved_arg2; /* restore argptr */
- } /* while (1) */
-
- /* Last chance attempt -- check entire name as a symbol */
- /* Use "copy" in preparation for jumping out of this block,
- to be consistent with usage following the jump target */
- copy = (char *) alloca (p - saved_arg2 + 1);
- memcpy (copy, saved_arg2, p - saved_arg2);
- /* Note: if is_quoted should be true, we snuff out quote here anyway */
- copy[p - saved_arg2] = '\000';
- /* Set argptr to skip over the name */
- *argptr = (*p == '\'') ? p + 1 : p;
- /* Look up entire name */
- sym = lookup_symbol (copy, 0, VAR_NAMESPACE, 0, &sym_symtab);
- if (sym)
- return symbol_found (funfirstline, canonical, copy, sym,
- NULL, sym_symtab);
-
- /* Couldn't find any interpretation as classes/namespaces, so give up */
- /* The quotes are important if copy is empty. */
- cplusplus_error (saved_arg,
- "Can't find member of namespace, class, struct, or union named \"%s\"\n",
- copy);
+ /* If we did not find a direct implementation anywhere in
+ this program space, consider superclasses. */
+ if (result_names.size () == last_result_len)
+ find_superclass_methods (std::move (superclass_vec), method_name,
+ SYMBOL_LANGUAGE (sym), &result_names);
+
+ /* We have a list of candidate symbol names, so now we
+ iterate over the symbol tables looking for all
+ matches in this pspace. */
+ add_all_symbol_names_from_pspace (&info, pspace, result_names,
+ FUNCTIONS_DOMAIN);
+
+ superclass_vec.clear ();
+ last_result_len = result_names.size ();
+ ++ix;
+ }
+ }
+
+ if (!symbols->empty () || !minsyms->empty ())
+ return;
+
+ /* Throw an NOT_FOUND_ERROR. This will be caught by the caller
+ and other attempts to locate the symbol will be made. */
+ throw_error (NOT_FOUND_ERROR, _("see caller, this text doesn't matter"));
}
\f
-/* Return the symtab associated to the filename given by the substring
- of *ARGPTR ending at P, and advance ARGPTR past that filename. */
+namespace {
-static struct symtab *
-symtab_from_filename (char **argptr, char *p, int is_quote_enclosed)
+/* This function object is a callback for iterate_over_symtabs, used
+ when collecting all matching symtabs. */
+
+class symtab_collector
{
- char *p1;
- char *copy;
- struct symtab *file_symtab;
-
- p1 = p;
- while (p != *argptr && p[-1] == ' ')
- --p;
- if ((*p == '"') && is_quote_enclosed)
- --p;
- copy = (char *) alloca (p - *argptr + 1);
- memcpy (copy, *argptr, p - *argptr);
- /* It may have the ending quote right after the file name */
- if (is_quote_enclosed && copy[p - *argptr - 1] == '"')
- copy[p - *argptr - 1] = 0;
- else
- copy[p - *argptr] = 0;
+public:
+ symtab_collector ()
+ {
+ m_symtab_table = htab_create (1, htab_hash_pointer, htab_eq_pointer,
+ NULL);
+ }
+
+ ~symtab_collector ()
+ {
+ if (m_symtab_table != NULL)
+ htab_delete (m_symtab_table);
+ }
+
+ /* Callable as a symbol_found_callback_ftype callback. */
+ bool operator () (symtab *sym);
+
+ /* Return an rvalue reference to the collected symtabs. */
+ std::vector<symtab *> &&release_symtabs ()
+ {
+ return std::move (m_symtabs);
+ }
+
+private:
+ /* The result vector of symtabs. */
+ std::vector<symtab *> m_symtabs;
+
+ /* This is used to ensure the symtabs are unique. */
+ htab_t m_symtab_table;
+};
+
+bool
+symtab_collector::operator () (struct symtab *symtab)
+{
+ void **slot;
+
+ slot = htab_find_slot (m_symtab_table, symtab, INSERT);
+ if (!*slot)
+ {
+ *slot = symtab;
+ m_symtabs.push_back (symtab);
+ }
+
+ return false;
+}
+
+} // namespace
+
+/* Given a file name, return a list of all matching symtabs. If
+ SEARCH_PSPACE is not NULL, the search is restricted to just that
+ program space. */
+
+static std::vector<symtab *>
+collect_symtabs_from_filename (const char *file,
+ struct program_space *search_pspace)
+{
+ symtab_collector collector;
/* Find that file's data. */
- file_symtab = lookup_symtab (copy);
- if (file_symtab == 0)
+ if (search_pspace == NULL)
+ {
+ struct program_space *pspace;
+
+ ALL_PSPACES (pspace)
+ {
+ if (pspace->executing_startup)
+ continue;
+
+ set_current_program_space (pspace);
+ iterate_over_symtabs (file, collector);
+ }
+ }
+ else
+ {
+ set_current_program_space (search_pspace);
+ iterate_over_symtabs (file, collector);
+ }
+
+ return collector.release_symtabs ();
+}
+
+/* Return all the symtabs associated to the FILENAME. If SEARCH_PSPACE is
+ not NULL, the search is restricted to just that program space. */
+
+static std::vector<symtab *>
+symtabs_from_filename (const char *filename,
+ struct program_space *search_pspace)
+{
+ std::vector<symtab *> result
+ = collect_symtabs_from_filename (filename, search_pspace);
+
+ if (result.empty ())
{
if (!have_full_symbols () && !have_partial_symbols ())
- error ("No symbol table is loaded. Use the \"file\" command.");
- error ("No source file named %s.", copy);
+ throw_error (NOT_FOUND_ERROR,
+ _("No symbol table is loaded. "
+ "Use the \"file\" command."));
+ source_file_not_found_error (filename);
+ }
+
+ return result;
+}
+
+/* See symtab.h. */
+
+void
+symbol_searcher::find_all_symbols (const std::string &name,
+ const struct language_defn *language,
+ enum search_domain search_domain,
+ std::vector<symtab *> *search_symtabs,
+ struct program_space *search_pspace)
+{
+ symbol_searcher_collect_info info;
+ struct linespec_state state;
+
+ memset (&state, 0, sizeof (state));
+ state.language = language;
+ info.state = &state;
+
+ info.result.symbols = &m_symbols;
+ info.result.minimal_symbols = &m_minimal_symbols;
+ std::vector<symtab *> all_symtabs;
+ if (search_symtabs == nullptr)
+ {
+ all_symtabs.push_back (nullptr);
+ search_symtabs = &all_symtabs;
}
+ info.file_symtabs = search_symtabs;
+
+ add_matching_symbols_to_info (name.c_str (), symbol_name_match_type::WILD,
+ search_domain, &info, search_pspace);
+}
- /* Discard the file name from the arg. */
- p = p1 + 1;
- while (*p == ' ' || *p == '\t')
- p++;
- *argptr = p;
+/* Look up a function symbol named NAME in symtabs FILE_SYMTABS. Matching
+ debug symbols are returned in SYMBOLS. Matching minimal symbols are
+ returned in MINSYMS. */
- return file_symtab;
+static void
+find_function_symbols (struct linespec_state *state,
+ std::vector<symtab *> *file_symtabs, const char *name,
+ symbol_name_match_type name_match_type,
+ std::vector<block_symbol> *symbols,
+ std::vector<bound_minimal_symbol> *minsyms)
+{
+ struct collect_info info;
+ std::vector<const char *> symbol_names;
+
+ info.state = state;
+ info.result.symbols = symbols;
+ info.result.minimal_symbols = minsyms;
+ info.file_symtabs = file_symtabs;
+
+ /* Try NAME as an Objective-C selector. */
+ find_imps (name, &symbol_names);
+ if (!symbol_names.empty ())
+ add_all_symbol_names_from_pspace (&info, state->search_pspace,
+ symbol_names, FUNCTIONS_DOMAIN);
+ else
+ add_matching_symbols_to_info (name, name_match_type, FUNCTIONS_DOMAIN,
+ &info, state->search_pspace);
}
-\f
+/* Find all symbols named NAME in FILE_SYMTABS, returning debug symbols
+ in SYMBOLS and minimal symbols in MINSYMS. */
+
+static void
+find_linespec_symbols (struct linespec_state *state,
+ std::vector<symtab *> *file_symtabs,
+ const char *lookup_name,
+ symbol_name_match_type name_match_type,
+ std::vector <block_symbol> *symbols,
+ std::vector<bound_minimal_symbol> *minsyms)
+{
+ std::string canon = cp_canonicalize_string_no_typedefs (lookup_name);
+ if (!canon.empty ())
+ lookup_name = canon.c_str ();
+
+ /* It's important to not call expand_symtabs_matching unnecessarily
+ as it can really slow things down (by unnecessarily expanding
+ potentially 1000s of symtabs, which when debugging some apps can
+ cost 100s of seconds). Avoid this to some extent by *first* calling
+ find_function_symbols, and only if that doesn't find anything
+ *then* call find_method. This handles two important cases:
+ 1) break (anonymous namespace)::foo
+ 2) break class::method where method is in class (and not a baseclass) */
+
+ find_function_symbols (state, file_symtabs, lookup_name,
+ name_match_type, symbols, minsyms);
+
+ /* If we were unable to locate a symbol of the same name, try dividing
+ the name into class and method names and searching the class and its
+ baseclasses. */
+ if (symbols->empty () && minsyms->empty ())
+ {
+ std::string klass, method;
+ const char *last, *p, *scope_op;
+
+ /* See if we can find a scope operator and break this symbol
+ name into namespaces${SCOPE_OPERATOR}class_name and method_name. */
+ scope_op = "::";
+ p = find_toplevel_string (lookup_name, scope_op);
+
+ last = NULL;
+ while (p != NULL)
+ {
+ last = p;
+ p = find_toplevel_string (p + strlen (scope_op), scope_op);
+ }
-/* This decodes a line where the argument is all digits (possibly
- preceded by a sign). Q should point to the end of those digits;
- the other arguments are as usual. */
+ /* If no scope operator was found, there is nothing more we can do;
+ we already attempted to lookup the entire name as a symbol
+ and failed. */
+ if (last == NULL)
+ return;
-static struct symtabs_and_lines
-decode_all_digits (char **argptr, struct symtab *default_symtab,
- int default_line, char ***canonical,
- struct symtab *file_symtab, char *q)
+ /* LOOKUP_NAME points to the class name.
+ LAST points to the method name. */
+ klass = std::string (lookup_name, last - lookup_name);
+ /* Skip past the scope operator. */
+ last += strlen (scope_op);
+ method = last;
+
+ /* Find a list of classes named KLASS. */
+ std::vector<block_symbol> classes
+ = lookup_prefix_sym (state, file_symtabs, klass.c_str ());
+ if (!classes.empty ())
+ {
+ /* Now locate a list of suitable methods named METHOD. */
+ TRY
+ {
+ find_method (state, file_symtabs,
+ klass.c_str (), method.c_str (),
+ &classes, symbols, minsyms);
+ }
+
+ /* If successful, we're done. If NOT_FOUND_ERROR
+ was not thrown, rethrow the exception that we did get. */
+ CATCH (except, RETURN_MASK_ERROR)
+ {
+ if (except.error != NOT_FOUND_ERROR)
+ throw_exception (except);
+ }
+ END_CATCH
+ }
+ }
+}
+
+/* Helper for find_label_symbols. Find all labels that match name
+ NAME in BLOCK. Return all labels that match in FUNCTION_SYMBOLS.
+ Return the actual function symbol in which the label was found in
+ LABEL_FUNC_RET. If COMPLETION_MODE is true, then NAME is
+ interpreted as a label name prefix. Otherwise, only a label named
+ exactly NAME match. */
+
+static void
+find_label_symbols_in_block (const struct block *block,
+ const char *name, struct symbol *fn_sym,
+ bool completion_mode,
+ std::vector<block_symbol> *result,
+ std::vector<block_symbol> *label_funcs_ret)
{
- struct symtabs_and_lines values;
- struct symtab_and_line val;
+ if (completion_mode)
+ {
+ struct block_iterator iter;
+ struct symbol *sym;
+ size_t name_len = strlen (name);
- enum sign
+ int (*cmp) (const char *, const char *, size_t);
+ cmp = case_sensitivity == case_sensitive_on ? strncmp : strncasecmp;
+
+ ALL_BLOCK_SYMBOLS (block, iter, sym)
+ {
+ if (symbol_matches_domain (SYMBOL_LANGUAGE (sym),
+ SYMBOL_DOMAIN (sym), LABEL_DOMAIN)
+ && cmp (SYMBOL_SEARCH_NAME (sym), name, name_len) == 0)
+ {
+ result->push_back ({sym, block});
+ label_funcs_ret->push_back ({fn_sym, block});
+ }
+ }
+ }
+ else
{
- none, plus, minus
+ struct block_symbol label_sym
+ = lookup_symbol (name, block, LABEL_DOMAIN, 0);
+
+ if (label_sym.symbol != NULL)
+ {
+ result->push_back (label_sym);
+ label_funcs_ret->push_back ({fn_sym, block});
+ }
}
- sign = none;
+}
- /* We might need a canonical line spec if no file was specified. */
- int need_canonical = (file_symtab == 0) ? 1 : 0;
+/* Return all labels that match name NAME in FUNCTION_SYMBOLS or NULL
+ if no matches were found.
- init_sal (&val);
+ Return the actual function symbol in which the label was found in
+ LABEL_FUNC_RET. If COMPLETION_MODE is true, then NAME is
+ interpreted as a label name prefix. Otherwise, only labels named
+ exactly NAME match. */
- /* This is where we need to make sure that we have good defaults.
- We must guarantee that this section of code is never executed
- when we are called with just a function name, since
- set_default_source_symtab_and_line uses
- select_source_symtab that calls us with such an argument */
- if (file_symtab == 0 && default_symtab == 0)
+static std::vector<block_symbol> *
+find_label_symbols (struct linespec_state *self,
+ std::vector<block_symbol> *function_symbols,
+ std::vector<block_symbol> *label_funcs_ret,
+ const char *name,
+ bool completion_mode)
+{
+ const struct block *block;
+ struct symbol *fn_sym;
+ std::vector<block_symbol> result;
+
+ if (function_symbols == NULL)
{
- /* Make sure we have at least a default source file. */
- set_default_source_symtab_and_line ();
- initialize_defaults (&default_symtab, &default_line);
+ set_current_program_space (self->program_space);
+ block = get_current_search_block ();
+
+ for (;
+ block && !BLOCK_FUNCTION (block);
+ block = BLOCK_SUPERBLOCK (block))
+ ;
+ if (!block)
+ return NULL;
+ fn_sym = BLOCK_FUNCTION (block);
+
+ find_label_symbols_in_block (block, name, fn_sym, completion_mode,
+ &result, label_funcs_ret);
+ }
+ else
+ {
+ for (const auto &elt : *function_symbols)
+ {
+ fn_sym = elt.symbol;
+ set_current_program_space (SYMTAB_PSPACE (symbol_symtab (fn_sym)));
+ block = SYMBOL_BLOCK_VALUE (fn_sym);
+
+ find_label_symbols_in_block (block, name, fn_sym, completion_mode,
+ &result, label_funcs_ret);
+ }
}
- if (**argptr == '+')
- sign = plus, (*argptr)++;
- else if (**argptr == '-')
- sign = minus, (*argptr)++;
- val.line = atoi (*argptr);
- switch (sign)
+ if (!result.empty ())
+ return new std::vector<block_symbol> (std::move (result));
+ return nullptr;
+}
+
+\f
+
+/* A helper for create_sals_line_offset that handles the 'list_mode' case. */
+
+static std::vector<symtab_and_line>
+decode_digits_list_mode (struct linespec_state *self,
+ linespec_p ls,
+ struct symtab_and_line val)
+{
+ gdb_assert (self->list_mode);
+
+ std::vector<symtab_and_line> values;
+
+ for (const auto &elt : *ls->file_symtabs)
{
- case plus:
- if (q == *argptr)
- val.line = 5;
- if (file_symtab == 0)
- val.line = default_line + val.line;
- break;
- case minus:
- if (q == *argptr)
- val.line = 15;
- if (file_symtab == 0)
- val.line = default_line - val.line;
- else
- val.line = 1;
- break;
- case none:
- break; /* No need to adjust val.line. */
- }
-
- while (*q == ' ' || *q == '\t')
- q++;
- *argptr = q;
- if (file_symtab == 0)
- file_symtab = default_symtab;
-
- /* It is possible that this source file has more than one symtab,
- and that the new line number specification has moved us from the
- default (in file_symtab) to a new one. */
- val.symtab = find_line_symtab (file_symtab, val.line, NULL, NULL);
- if (val.symtab == 0)
- val.symtab = file_symtab;
-
- val.pc = 0;
- values.sals = (struct symtab_and_line *)
- xmalloc (sizeof (struct symtab_and_line));
- values.sals[0] = val;
- values.nelts = 1;
- if (need_canonical)
- build_canonical_line_spec (values.sals, NULL, canonical);
+ /* The logic above should ensure this. */
+ gdb_assert (elt != NULL);
+
+ set_current_program_space (SYMTAB_PSPACE (elt));
+
+ /* Simplistic search just for the list command. */
+ val.symtab = find_line_symtab (elt, val.line, NULL, NULL);
+ if (val.symtab == NULL)
+ val.symtab = elt;
+ val.pspace = SYMTAB_PSPACE (elt);
+ val.pc = 0;
+ val.explicit_line = 1;
+
+ add_sal_to_sals (self, &values, &val, NULL, 0);
+ }
+
return values;
}
+/* A helper for create_sals_line_offset that iterates over the symtabs,
+ adding lines to the VEC. */
+
+static std::vector<symtab_and_line>
+decode_digits_ordinary (struct linespec_state *self,
+ linespec_p ls,
+ int line,
+ struct linetable_entry **best_entry)
+{
+ std::vector<symtab_and_line> sals;
+ for (const auto &elt : *ls->file_symtabs)
+ {
+ std::vector<CORE_ADDR> pcs;
+
+ /* The logic above should ensure this. */
+ gdb_assert (elt != NULL);
+
+ set_current_program_space (SYMTAB_PSPACE (elt));
+
+ pcs = find_pcs_for_symtab_line (elt, line, best_entry);
+ for (CORE_ADDR pc : pcs)
+ {
+ symtab_and_line sal;
+ sal.pspace = SYMTAB_PSPACE (elt);
+ sal.symtab = elt;
+ sal.line = line;
+ sal.pc = pc;
+ sals.push_back (std::move (sal));
+ }
+ }
+
+ return sals;
+}
+
\f
-/* Decode a linespec starting with a dollar sign. */
+/* Return the line offset represented by VARIABLE. */
-static struct symtabs_and_lines
-decode_dollar (char *copy, int funfirstline, struct symtab *default_symtab,
- char ***canonical, struct symtab *file_symtab)
+static struct line_offset
+linespec_parse_variable (struct linespec_state *self, const char *variable)
{
- struct value *valx;
int index = 0;
- int need_canonical = 0;
- struct symtabs_and_lines values;
- struct symtab_and_line val;
- char *p;
- struct symbol *sym;
- /* The symtab that SYM was found in. */
- struct symtab *sym_symtab;
- struct minimal_symbol *msymbol;
-
- p = (copy[1] == '$') ? copy + 2 : copy + 1;
+ const char *p;
+ struct line_offset offset = {0, LINE_OFFSET_NONE};
+
+ p = (variable[1] == '$') ? variable + 2 : variable + 1;
+ if (*p == '$')
+ ++p;
while (*p >= '0' && *p <= '9')
- p++;
- if (!*p) /* reached end of token without hitting non-digit */
+ ++p;
+ if (!*p) /* Reached end of token without hitting non-digit. */
{
- /* We have a value history reference */
- sscanf ((copy[1] == '$') ? copy + 2 : copy + 1, "%d", &index);
- valx = access_value_history ((copy[1] == '$') ? -index : index);
- if (TYPE_CODE (VALUE_TYPE (valx)) != TYPE_CODE_INT)
- error ("History values used in line specs must have integer values.");
+ /* We have a value history reference. */
+ struct value *val_history;
+
+ sscanf ((variable[1] == '$') ? variable + 2 : variable + 1, "%d", &index);
+ val_history
+ = access_value_history ((variable[1] == '$') ? -index : index);
+ if (TYPE_CODE (value_type (val_history)) != TYPE_CODE_INT)
+ error (_("History values used in line "
+ "specs must have integer values."));
+ offset.offset = value_as_long (val_history);
}
else
{
/* Not all digits -- may be user variable/function or a
- convenience variable */
+ convenience variable. */
+ LONGEST valx;
+ struct internalvar *ivar;
+
+ /* Try it as a convenience variable. If it is not a convenience
+ variable, return and allow normal symbol lookup to occur. */
+ ivar = lookup_only_internalvar (variable + 1);
+ if (ivar == NULL)
+ /* No internal variable with that name. Mark the offset
+ as unknown to allow the name to be looked up as a symbol. */
+ offset.sign = LINE_OFFSET_UNKNOWN;
+ else
+ {
+ /* We found a valid variable name. If it is not an integer,
+ throw an error. */
+ if (!get_internalvar_integer (ivar, &valx))
+ error (_("Convenience variables used in line "
+ "specs must have integer values."));
+ else
+ offset.offset = valx;
+ }
+ }
+
+ return offset;
+}
+\f
+
+/* We've found a minimal symbol MSYMBOL in OBJFILE to associate with our
+ linespec; return the SAL in RESULT. This function should return SALs
+ matching those from find_function_start_sal, otherwise false
+ multiple-locations breakpoints could be placed. */
+
+static void
+minsym_found (struct linespec_state *self, struct objfile *objfile,
+ struct minimal_symbol *msymbol,
+ std::vector<symtab_and_line> *result)
+{
+ bool want_start_sal;
- /* Look up entire name as a symbol first */
- sym = lookup_symbol (copy, 0, VAR_NAMESPACE, 0, &sym_symtab);
- file_symtab = (struct symtab *) 0;
- need_canonical = 1;
- /* Symbol was found --> jump to normal symbol processing. */
- if (sym)
- return symbol_found (funfirstline, canonical, copy, sym,
- NULL, sym_symtab);
+ CORE_ADDR func_addr;
+ bool is_function = msymbol_is_function (objfile, msymbol, &func_addr);
- /* If symbol was not found, look in minimal symbol tables */
- msymbol = lookup_minimal_symbol (copy, NULL, NULL);
- /* Min symbol was found --> jump to minsym processing. */
- if (msymbol)
- return minsym_found (funfirstline, msymbol);
+ if (is_function)
+ {
+ const char *msym_name = MSYMBOL_LINKAGE_NAME (msymbol);
- /* Not a user variable or function -- must be convenience variable */
- need_canonical = (file_symtab == 0) ? 1 : 0;
- valx = value_of_internalvar (lookup_internalvar (copy + 1));
- if (TYPE_CODE (VALUE_TYPE (valx)) != TYPE_CODE_INT)
- error ("Convenience variables used in line specs must have integer values.");
+ if (MSYMBOL_TYPE (msymbol) == mst_text_gnu_ifunc
+ || MSYMBOL_TYPE (msymbol) == mst_data_gnu_ifunc)
+ want_start_sal = gnu_ifunc_resolve_name (msym_name, &func_addr);
+ else
+ want_start_sal = true;
}
- init_sal (&val);
+ symtab_and_line sal;
- /* Either history value or convenience value from above, in valx */
- val.symtab = file_symtab ? file_symtab : default_symtab;
- val.line = value_as_long (valx);
- val.pc = 0;
+ if (is_function && want_start_sal)
+ sal = find_function_start_sal (func_addr, NULL, self->funfirstline);
+ else
+ {
+ sal.objfile = objfile;
+ sal.msymbol = msymbol;
+ /* Store func_addr, not the minsym's address in case this was an
+ ifunc that hasn't been resolved yet. */
+ if (is_function)
+ sal.pc = func_addr;
+ else
+ sal.pc = MSYMBOL_VALUE_ADDRESS (objfile, msymbol);
+ sal.pspace = current_program_space;
+ }
- values.sals = (struct symtab_and_line *) xmalloc (sizeof val);
- values.sals[0] = val;
- values.nelts = 1;
+ sal.section = MSYMBOL_OBJ_SECTION (objfile, msymbol);
- if (need_canonical)
- build_canonical_line_spec (values.sals, NULL, canonical);
+ if (maybe_add_address (self->addr_set, objfile->pspace, sal.pc))
+ add_sal_to_sals (self, result, &sal, MSYMBOL_NATURAL_NAME (msymbol), 0);
+}
- return values;
+/* A helper function to classify a minimal_symbol_type according to
+ priority. */
+
+static int
+classify_mtype (enum minimal_symbol_type t)
+{
+ switch (t)
+ {
+ case mst_file_text:
+ case mst_file_data:
+ case mst_file_bss:
+ /* Intermediate priority. */
+ return 1;
+
+ case mst_solib_trampoline:
+ /* Lowest priority. */
+ return 2;
+
+ default:
+ /* Highest priority. */
+ return 0;
+ }
}
-\f
+/* Callback for std::sort that sorts symbols by priority. */
+
+static bool
+compare_msyms (const bound_minimal_symbol &a, const bound_minimal_symbol &b)
+{
+ enum minimal_symbol_type ta = MSYMBOL_TYPE (a.minsym);
+ enum minimal_symbol_type tb = MSYMBOL_TYPE (b.minsym);
-/* Decode a linespec that's a variable. If FILE_SYMTAB is non-NULL,
- look in that symtab's static variables first. */
+ return classify_mtype (ta) < classify_mtype (tb);
+}
+
+/* Helper for search_minsyms_for_name that adds the symbol to the
+ result. */
+
+static void
+add_minsym (struct minimal_symbol *minsym, struct objfile *objfile,
+ struct symtab *symtab, int list_mode,
+ std::vector<struct bound_minimal_symbol> *msyms)
+{
+ if (symtab != NULL)
+ {
+ /* We're looking for a label for which we don't have debug
+ info. */
+ CORE_ADDR func_addr;
+ if (msymbol_is_function (objfile, minsym, &func_addr))
+ {
+ symtab_and_line sal = find_pc_sect_line (func_addr, NULL, 0);
+
+ if (symtab != sal.symtab)
+ return;
+ }
+ }
+
+ /* Exclude data symbols when looking for breakpoint locations. */
+ if (!list_mode && !msymbol_is_function (objfile, minsym))
+ return;
+
+ struct bound_minimal_symbol mo = {minsym, objfile};
+ msyms->push_back (mo);
+ return;
+}
+
+/* Search for minimal symbols called NAME. If SEARCH_PSPACE
+ is not NULL, the search is restricted to just that program
+ space.
+
+ If SYMTAB is NULL, search all objfiles, otherwise
+ restrict results to the given SYMTAB. */
-static struct symtabs_and_lines
-decode_variable (char *copy, int funfirstline, char ***canonical,
- struct symtab *file_symtab)
+static void
+search_minsyms_for_name (struct collect_info *info,
+ const lookup_name_info &name,
+ struct program_space *search_pspace,
+ struct symtab *symtab)
{
- struct symbol *sym;
- /* The symtab that SYM was found in. */
- struct symtab *sym_symtab;
+ std::vector<struct bound_minimal_symbol> minsyms;
+
+ if (symtab == NULL)
+ {
+ struct program_space *pspace;
+
+ ALL_PSPACES (pspace)
+ {
+ if (search_pspace != NULL && search_pspace != pspace)
+ continue;
+ if (pspace->executing_startup)
+ continue;
- struct minimal_symbol *msymbol;
+ set_current_program_space (pspace);
- sym = lookup_symbol (copy,
- (file_symtab
- ? BLOCKVECTOR_BLOCK (BLOCKVECTOR (file_symtab),
- STATIC_BLOCK)
- : get_selected_block (0)),
- VAR_NAMESPACE, 0, &sym_symtab);
+ for (objfile *objfile : all_objfiles (current_program_space))
+ {
+ iterate_over_minimal_symbols (objfile, name,
+ [&] (struct minimal_symbol *msym)
+ {
+ add_minsym (msym, objfile, nullptr,
+ info->state->list_mode,
+ &minsyms);
+ return false;
+ });
+ }
+ }
+ }
+ else
+ {
+ if (search_pspace == NULL || SYMTAB_PSPACE (symtab) == search_pspace)
+ {
+ set_current_program_space (SYMTAB_PSPACE (symtab));
+ iterate_over_minimal_symbols
+ (SYMTAB_OBJFILE (symtab), name,
+ [&] (struct minimal_symbol *msym)
+ {
+ add_minsym (msym, SYMTAB_OBJFILE (symtab), symtab,
+ info->state->list_mode, &minsyms);
+ return false;
+ });
+ }
+ }
- if (sym != NULL)
- return symbol_found (funfirstline, canonical, copy, sym,
- file_symtab, sym_symtab);
+ if (!minsyms.empty ())
+ {
+ int classification;
- msymbol = lookup_minimal_symbol (copy, NULL, NULL);
+ std::sort (minsyms.begin (), minsyms.end (), compare_msyms);
- if (msymbol != NULL)
- return minsym_found (funfirstline, msymbol);
+ /* Now the minsyms are in classification order. So, we walk
+ over them and process just the minsyms with the same
+ classification as the very first minsym in the list. */
+ classification = classify_mtype (MSYMBOL_TYPE (minsyms[0].minsym));
- if (!have_full_symbols () &&
- !have_partial_symbols () && !have_minimal_symbols ())
- error ("No symbol table is loaded. Use the \"file\" command.");
+ for (const bound_minimal_symbol &item : minsyms)
+ {
+ if (classify_mtype (MSYMBOL_TYPE (item.minsym)) != classification)
+ break;
- error ("Function \"%s\" not defined.", copy);
+ info->result.minimal_symbols->push_back (item);
+ }
+ }
}
+/* A helper function to add all symbols matching NAME to INFO. If
+ PSPACE is not NULL, the search is restricted to just that program
+ space. */
+
+static void
+add_matching_symbols_to_info (const char *name,
+ symbol_name_match_type name_match_type,
+ enum search_domain search_domain,
+ struct collect_info *info,
+ struct program_space *pspace)
+{
+ lookup_name_info lookup_name (name, name_match_type);
+
+ for (const auto &elt : *info->file_symtabs)
+ {
+ if (elt == nullptr)
+ {
+ iterate_over_all_matching_symtabs (info->state, lookup_name,
+ VAR_DOMAIN, search_domain,
+ pspace, true,
+ [&] (block_symbol *bsym)
+ { return info->add_symbol (bsym); });
+ search_minsyms_for_name (info, lookup_name, pspace, NULL);
+ }
+ else if (pspace == NULL || pspace == SYMTAB_PSPACE (elt))
+ {
+ int prev_len = info->result.symbols->size ();
+
+ /* Program spaces that are executing startup should have
+ been filtered out earlier. */
+ gdb_assert (!SYMTAB_PSPACE (elt)->executing_startup);
+ set_current_program_space (SYMTAB_PSPACE (elt));
+ iterate_over_file_blocks (elt, lookup_name, VAR_DOMAIN,
+ [&] (block_symbol *bsym)
+ { return info->add_symbol (bsym); });
+
+ /* If no new symbols were found in this iteration and this symtab
+ is in assembler, we might actually be looking for a label for
+ which we don't have debug info. Check for a minimal symbol in
+ this case. */
+ if (prev_len == info->result.symbols->size ()
+ && elt->language == language_asm)
+ search_minsyms_for_name (info, lookup_name, pspace, elt);
+ }
+ }
+}
\f
/* Now come some functions that are called from multiple places within
decode_line_1. */
-/* We've found a symbol SYM to associate with our linespec; build a
- corresponding struct symtabs_and_lines. */
-
-static struct symtabs_and_lines
-symbol_found (int funfirstline, char ***canonical, char *copy,
- struct symbol *sym, struct symtab *file_symtab,
- struct symtab *sym_symtab)
+static int
+symbol_to_sal (struct symtab_and_line *result,
+ int funfirstline, struct symbol *sym)
{
- struct symtabs_and_lines values;
-
if (SYMBOL_CLASS (sym) == LOC_BLOCK)
{
- /* Arg is the name of a function */
- values.sals = (struct symtab_and_line *)
- xmalloc (sizeof (struct symtab_and_line));
- values.sals[0] = find_function_start_sal (sym, funfirstline);
- values.nelts = 1;
-
- /* Don't use the SYMBOL_LINE; if used at all it points to
- the line containing the parameters or thereabouts, not
- the first line of code. */
-
- /* We might need a canonical line spec if it is a static
- function. */
- if (file_symtab == 0)
- {
- struct blockvector *bv = BLOCKVECTOR (sym_symtab);
- struct block *b = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
- if (lookup_block_symbol (b, copy, NULL, VAR_NAMESPACE) != NULL)
- build_canonical_line_spec (values.sals, copy, canonical);
- }
- return values;
+ *result = find_function_start_sal (sym, funfirstline);
+ return 1;
}
else
{
- if (funfirstline)
- error ("\"%s\" is not a function", copy);
+ if (SYMBOL_CLASS (sym) == LOC_LABEL && SYMBOL_VALUE_ADDRESS (sym) != 0)
+ {
+ *result = {};
+ result->symtab = symbol_symtab (sym);
+ result->symbol = sym;
+ result->line = SYMBOL_LINE (sym);
+ result->pc = SYMBOL_VALUE_ADDRESS (sym);
+ result->pspace = SYMTAB_PSPACE (result->symtab);
+ result->explicit_pc = 1;
+ return 1;
+ }
+ else if (funfirstline)
+ {
+ /* Nothing. */
+ }
else if (SYMBOL_LINE (sym) != 0)
{
/* We know its line number. */
- values.sals = (struct symtab_and_line *)
- xmalloc (sizeof (struct symtab_and_line));
- values.nelts = 1;
- memset (&values.sals[0], 0, sizeof (values.sals[0]));
- values.sals[0].symtab = sym_symtab;
- values.sals[0].line = SYMBOL_LINE (sym);
- return values;
+ *result = {};
+ result->symtab = symbol_symtab (sym);
+ result->symbol = sym;
+ result->line = SYMBOL_LINE (sym);
+ result->pc = SYMBOL_VALUE_ADDRESS (sym);
+ result->pspace = SYMTAB_PSPACE (result->symtab);
+ return 1;
}
- else
- /* This can happen if it is compiled with a compiler which doesn't
- put out line numbers for variables. */
- /* FIXME: Shouldn't we just set .line and .symtab to zero
- and return? For example, "info line foo" could print
- the address. */
- error ("Line number not known for symbol \"%s\"", copy);
}
-}
-/* We've found a minimal symbol MSYMBOL to associate with our
- linespec; build a corresponding struct symtabs_and_lines. */
+ return 0;
+}
-static struct symtabs_and_lines
-minsym_found (int funfirstline, struct minimal_symbol *msymbol)
+linespec_result::~linespec_result ()
{
- struct symtabs_and_lines values;
+ for (linespec_sals &lsal : lsals)
+ xfree (lsal.canonical);
+}
- values.sals = (struct symtab_and_line *)
- xmalloc (sizeof (struct symtab_and_line));
- values.sals[0] = find_pc_sect_line (SYMBOL_VALUE_ADDRESS (msymbol),
- (struct sec *) 0, 0);
- values.sals[0].section = SYMBOL_BFD_SECTION (msymbol);
- if (funfirstline)
- {
- values.sals[0].pc += FUNCTION_START_OFFSET;
- values.sals[0].pc = SKIP_PROLOGUE (values.sals[0].pc);
- }
- values.nelts = 1;
- return values;
+/* Return the quote characters permitted by the linespec parser. */
+
+const char *
+get_gdb_linespec_parser_quote_characters (void)
+{
+ return linespec_quote_characters;
}