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/* Parser for linespec for the GNU debugger, GDB.
Copyright (C) 1986-2005, 2007-2012 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 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "symtab.h"
#include "frame.h"
#include "command.h"
#include "symfile.h"
#include "objfiles.h"
#include "source.h"
#include "demangle.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 "exceptions.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"
typedef struct symtab *symtab_p;
DEF_VEC_P (symtab_p);
typedef struct symbol *symbolp;
DEF_VEC_P (symbolp);
typedef struct type *typep;
DEF_VEC_P (typep);
/* 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. */
struct address_entry
{
struct program_space *pspace;
CORE_ADDR addr;
};
/* A helper struct which just holds a minimal symbol and the object
file from which it came. */
typedef struct minsym_and_objfile
{
struct minimal_symbol *minsym;
struct objfile *objfile;
} minsym_and_objfile_d;
DEF_VEC_O (minsym_and_objfile_d);
/* An enumeration of possible signs for a line offset. */
enum offset_relative_sign
{
/* No sign */
LINE_OFFSET_NONE,
/* A plus sign ("+") */
LINE_OFFSET_PLUS,
/* A minus sign ("-") */
LINE_OFFSET_MINUS,
/* A special "sign" for unspecified offset. */
LINE_OFFSET_UNKNOWN
};
/* A line offset in a linespec. */
struct line_offset
{
/* Line offset and any specified sign. */
int offset;
enum offset_relative_sign sign;
};
/* 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. */
struct linespec
{
/* An expression and the resulting PC. Specifying an expression
currently precludes the use of other members. */
/* The expression entered by the user. */
char *expression;
/* The resulting PC expression derived from evaluating EXPRESSION. */
CORE_ADDR expr_pc;
/* Any specified file symtabs. */
/* The user-supplied source filename or NULL if none was specified. */
char *source_filename;
/* The list of symtabs to search to which to limit the search. May not
be NULL. If 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. */
VEC (symtab_p) *file_symtabs;
/* The name of a function or method and any matching symbols. */
/* The user-specified function name. If no function name was
supplied, this may be NULL. */
char *function_name;
/* A list of matching function symbols and minimal symbols. Both lists
may be NULL if no matching symbols were found. */
VEC (symbolp) *function_symbols;
VEC (minsym_and_objfile_d) *minimal_symbols;
/* The name of a label and matching symbols. */
/* The user-specified label name. */
char *label_name;
/* 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
{
VEC (symbolp) *label_symbols;
VEC (symbolp) *function_symbols;
} labels;
/* Line offset. It may be LINE_OFFSET_UNKNOWN, meaning that no
offset was specified. */
struct line_offset line_offset;
};
typedef struct linespec *linespec_p;
/* 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. */
struct linespec_state
{
/* The language in use during linespec processing. */
const struct language_defn *language;
/* The program space as seen when the module was entered. */
struct program_space *program_space;
/* The default symtab to use, if no other symtab is specified. */
struct symtab *default_symtab;
/* The default line to use. */
int default_line;
/* The 'funfirstline' value that was passed in to decode_line_1 or
decode_line_full. */
int funfirstline;
/* Nonzero if we are running in 'list' mode; see decode_line_list. */
int list_mode;
/* The 'canonical' value passed to decode_line_full, or NULL. */
struct linespec_result *canonical;
/* Canonical strings that mirror the symtabs_and_lines result. */
char **canonical_names;
/* 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;
};
/* This is a helper object that is used when collecting symbols into a
result. */
struct collect_info
{
/* The linespec object in use. */
struct linespec_state *state;
/* A list of symtabs to which to restrict matches. */
VEC (symtab_p) *file_symtabs;
/* The result being accumulated. */
struct
{
VEC (symbolp) *symbols;
VEC (minsym_and_objfile_d) *minimal_symbols;
} result;
};
/* Token types */
enum ls_token_type
{
/* A keyword */
LSTOKEN_KEYWORD = 0,
/* A colon "separator" */
LSTOKEN_COLON,
/* A string */
LSTOKEN_STRING,
/* A number */
LSTOKEN_NUMBER,
/* A comma */
LSTOKEN_COMMA,
/* EOI (end of input) */
LSTOKEN_EOI,
/* Consumed token */
LSTOKEN_CONSUMED
};
typedef enum ls_token_type linespec_token_type;
/* List of keywords */
static const char * const linespec_keywords[] = { "if", "thread", "task" };
/* A token of the linespec lexer */
struct ls_token
{
/* The type of the token */
linespec_token_type type;
/* Data for the token */
union
{
/* A string, given as a stoken */
struct stoken string;
/* A keyword */
const char *keyword;
} data;
};
typedef struct ls_token linespec_token;
#define LS_TOKEN_STOKEN(TOK) (TOK).data.string
#define LS_TOKEN_KEYWORD(TOK) (TOK).data.keyword
/* An instance of the linespec parser. */
struct ls_parser
{
/* Lexer internal data */
struct
{
/* Save head of input stream. */
char *saved_arg;
/* Head of the input stream. */
char **stream;
#define PARSER_STREAM(P) (*(P)->lexer.stream)
/* The current token. */
linespec_token current;
} lexer;
/* Is the entire linespec quote-enclosed? */
int is_quote_enclosed;
/* The state of the parse. */
struct linespec_state state;
#define PARSER_STATE(PPTR) (&(PPTR)->state)
/* The result of the parse. */
struct linespec result;
#define PARSER_RESULT(PPTR) (&(PPTR)->result)
};
typedef struct ls_parser linespec_parser;
/* Prototypes for local functions. */
static void initialize_defaults (struct symtab **default_symtab,
int *default_line);
static CORE_ADDR linespec_expression_to_pc (char **exp_ptr);
static struct symtabs_and_lines decode_objc (struct linespec_state *self,
linespec_p ls,
char **argptr);
static VEC (symtab_p) *symtabs_from_filename (const char *);
static VEC (symbolp) *find_label_symbols (struct linespec_state *self,
VEC (symbolp) *function_symbols,
VEC (symbolp) **label_funcs_ret,
const char *name);
void find_linespec_symbols (struct linespec_state *self,
VEC (symtab_p) *file_symtabs,
const char *name,
VEC (symbolp) **symbols,
VEC (minsym_and_objfile_d) **minsyms);
static struct line_offset
linespec_parse_variable (struct linespec_state *self,
const char *variable);
static int symbol_to_sal (struct symtab_and_line *result,
int funfirstline, struct symbol *sym);
static void add_matching_symbols_to_info (const char *name,
struct collect_info *info,
struct program_space *pspace);
static void add_all_symbol_names_from_pspace (struct collect_info *info,
struct program_space *pspace,
VEC (const_char_ptr) *names);
static VEC (symtab_p) *collect_symtabs_from_filename (const char *file);
static void decode_digits_ordinary (struct linespec_state *self,
linespec_p ls,
int line,
struct symtabs_and_lines *sals,
struct linetable_entry **best_entry);
static void decode_digits_list_mode (struct linespec_state *self,
linespec_p ls,
struct symtabs_and_lines *values,
struct symtab_and_line val);
static void minsym_found (struct linespec_state *self, struct objfile *objfile,
struct minimal_symbol *msymbol,
struct symtabs_and_lines *result);
static int compare_symbols (const void *a, const void *b);
static int compare_msymbols (const void *a, const void *b);
static const char *find_toplevel_char (const char *s, char c);
/* 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 = "\"\'";
/* Lexer functions. */
/* Lex a number from the input in PARSER. This only supports
decimal numbers.
Return true if input is decimal numbers. Return false if not. */
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);
/* Keep any sign at the start of the stream. */
if (*PARSER_STREAM (parser) == '+' || *PARSER_STREAM (parser) == '-')
{
++LS_TOKEN_STOKEN (*tokenp).length;
++(PARSER_STREAM (parser));
}
while (isdigit (*PARSER_STREAM (parser)))
{
++LS_TOKEN_STOKEN (*tokenp).length;
++(PARSER_STREAM (parser));
}
/* If the next character in the input buffer is not a space, comma,
quote, or colon, the 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)))
{
PARSER_STREAM (parser) = LS_TOKEN_STOKEN (*tokenp).ptr;
return 0;
}
return 1;
}
/* Does P represent one of the keywords? If so, return
the keyword. If not, return NULL. */
static const char *
linespec_lexer_lex_keyword (const char *p)
{
int i;
if (p != NULL)
{
for (i = 0; i < ARRAY_SIZE (linespec_keywords); ++i)
{
int len = strlen (linespec_keywords[i]);
/* If P begins with one of the keywords and the next
character is not a valid identifier character,
we have found a keyword. */
if (strncmp (p, linespec_keywords[i], len) == 0
&& !(isalnum (p[len]) || p[len] == '_'))
return linespec_keywords[i];
}
}
return NULL;
}
/* Does STRING represent an Ada operator? If so, return the length
of the decoded operator name. If not, return 0. */
static int
is_ada_operator (const char *string)
{
const struct ada_opname_map *mapping;
for (mapping = ada_opname_table;
mapping->encoded != NULL
&& strncmp (mapping->decoded, string,
strlen (mapping->decoded)) != 0; ++mapping)
;
return mapping->decoded == NULL ? 0 : strlen (mapping->decoded);
}
/* 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)
{
const char *p, *last;
p = last = find_toplevel_char (string, quote_char);
while (p && *p != '\0' && *p != ':')
{
p = find_toplevel_char (p, quote_char);
if (p != NULL)
last = p++;
}
return last;
}
/* Make a writable copy of the string given in TOKEN, trimming
any trailing whitespace. */
static char *
copy_token_string (linespec_token token)
{
char *str, *s;
if (token.type == LSTOKEN_KEYWORD)
return xstrdup (LS_TOKEN_KEYWORD (token));
str = savestring (LS_TOKEN_STOKEN (token).ptr,
LS_TOKEN_STOKEN (token).length);
s = remove_trailing_whitespace (str, str + LS_TOKEN_STOKEN (token).length);
*s = '\0';
return str;
}
/* Does P represent the end of a quote-enclosed linespec? */
static int
is_closing_quote_enclosed (const char *p)
{
if (strchr (linespec_quote_characters, *p))
++p;
p = skip_spaces ((char *) p);
return (*p == '\0' || linespec_lexer_lex_keyword (p));
}
/* 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. */
static char *
find_parameter_list_end (char *input)
{
char end_char, start_char;
int depth;
char *p;
start_char = *input;
if (start_char == '(')
end_char = ')';
else if (start_char == '<')
end_char = '>';
else
return NULL;
p = input;
depth = 0;
while (*p)
{
if (*p == start_char)
++depth;
else if (*p == end_char)
{
if (--depth == 0)
{
++p;
break;
}
}
++p;
}
return p;
}
/* Lex a string from the input in PARSER. */
static linespec_token
linespec_lexer_lex_string (linespec_parser *parser)
{
linespec_token token;
char *start = PARSER_STREAM (parser);
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)))
{
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)
{
/* 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;
}
/* The input does not represent an Ada operator -- fall through
to normal quoted string handling. */
}
/* Skip past the beginning quote. */
++(PARSER_STREAM (parser));
/* Mark the start of the string. */
LS_TOKEN_STOKEN (token).ptr = PARSER_STREAM (parser);
/* Skip to the ending quote. */
end = skip_quote_char (PARSER_STREAM (parser), quote_char);
/* Error if the input did not terminate properly. */
if (end == NULL)
error (_("unmatched quote"));
/* 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
{
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));
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 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) == '(')
{
char *p;
p = find_parameter_list_end (PARSER_STREAM (parser));
if (p != NULL)
{
PARSER_STREAM (parser) = p;
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) > 8
/* strlen ("operator") */)
{
char *p = strstr (start, "operator");
if (p != NULL && is_operator_name (p))
{
/* 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. */
keyword = linespec_lexer_lex_keyword (PARSER_STREAM (parser));
if (keyword != NULL)
{
parser->lexer.current.type = LSTOKEN_KEYWORD;
LS_TOKEN_KEYWORD (parser->lexer.current) = 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
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. */
static linespec_token
linespec_lexer_consume_token (linespec_parser *parser)
{
parser->lexer.current.type = LSTOKEN_CONSUMED;
return linespec_lexer_lex_one (parser);
}
/* Return the next token without consuming the current token. */
static linespec_token
linespec_lexer_peek_token (linespec_parser *parser)
{
linespec_token next;
char *saved_stream = PARSER_STREAM (parser);
linespec_token saved_token = parser->lexer.current;
next = linespec_lexer_consume_token (parser);
PARSER_STREAM (parser) = saved_stream;
parser->lexer.current = saved_token;
return next;
}
/* Helper functions. */
/* Add SAL to SALS. */
static void
add_sal_to_sals_basic (struct symtabs_and_lines *sals,
struct symtab_and_line *sal)
{
++sals->nelts;
sals->sals = xrealloc (sals->sals, sals->nelts * sizeof (sals->sals[0]));
sals->sals[sals->nelts - 1] = *sal;
}
/* 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. */
static void
add_sal_to_sals (struct linespec_state *self,
struct symtabs_and_lines *sals,
struct symtab_and_line *sal,
const char *symname)
{
add_sal_to_sals_basic (sals, sal);
if (self->canonical)
{
char *canonical_name = NULL;
self->canonical_names = xrealloc (self->canonical_names,
sals->nelts * sizeof (char *));
if (sal->symtab && sal->symtab->filename)
{
char *filename = sal->symtab->filename;
/* 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_name = xstrprintf ("%s:%s:%d", filename, symname,
sal->line);
else if (symname != NULL)
canonical_name = xstrprintf ("%s:%s", filename, symname);
else
canonical_name = xstrprintf ("%s:%d", filename, sal->line);
}
self->canonical_names[sals->nelts - 1] = canonical_name;
}
}
/* A hash function for address_entry. */
static hashval_t
hash_address_entry (const void *p)
{
const struct address_entry *aep = 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 = a;
const struct address_entry *aeb = 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 callback function and the additional data to call it with. */
struct symbol_and_data_callback
{
/* The callback to use. */
symbol_found_callback_ftype *callback;
/* Data to be passed to the callback. */
void *data;
};
/* A helper for iterate_over_all_matching_symtabs that is used to
restrict calls to another callback to symbols representing inline
symbols only. */
static int
iterate_inline_only (struct symbol *sym, void *d)
{
if (SYMBOL_INLINED (sym))
{
struct symbol_and_data_callback *cad = d;
return cad->callback (sym, cad->data);
}
return 1; /* Continue iterating. */
}
/* Some data for the expand_symtabs_matching callback. */
struct symbol_matcher_data
{
/* The lookup name against which symbol name should be compared. */
const char *lookup_name;
/* The routine to be used for comparison. */
symbol_name_cmp_ftype symbol_name_cmp;
};
/* A helper for iterate_over_all_matching_symtabs that is passed as a
callback to the expand_symtabs_matching method. */
static int
iterate_name_matcher (const char *name, void *d)
{
const struct symbol_matcher_data *data = d;
if (data->symbol_name_cmp (name, data->lookup_name) == 0)
return 1; /* Expand this symbol's symbol table. */
return 0; /* Skip this symbol. */
}
/* 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 nonzero 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 char *name,
const domain_enum domain,
symbol_found_callback_ftype *callback,
void *data,
struct program_space *search_pspace,
int include_inline)
{
struct objfile *objfile;
struct program_space *pspace;
struct symbol_matcher_data matcher_data;
matcher_data.lookup_name = name;
matcher_data.symbol_name_cmp =
state->language->la_get_symbol_name_cmp != NULL
? state->language->la_get_symbol_name_cmp (name)
: strcmp_iw;
ALL_PSPACES (pspace)
{
if (search_pspace != NULL && search_pspace != pspace)
continue;
if (pspace->executing_startup)
continue;
set_current_program_space (pspace);
ALL_OBJFILES (objfile)
{
struct symtab *symtab;
if (objfile->sf)
objfile->sf->qf->expand_symtabs_matching (objfile, NULL,
iterate_name_matcher,
ALL_DOMAIN,
&matcher_data);
ALL_OBJFILE_PRIMARY_SYMTABS (objfile, symtab)
{
struct block *block;
block = BLOCKVECTOR_BLOCK (BLOCKVECTOR (symtab), STATIC_BLOCK);
LA_ITERATE_OVER_SYMBOLS (block, name, domain, callback, data);
if (include_inline)
{
struct symbol_and_data_callback cad = { callback, data };
int i;
for (i = FIRST_LOCAL_BLOCK;
i < BLOCKVECTOR_NBLOCKS (BLOCKVECTOR (symtab)); i++)
{
block = BLOCKVECTOR_BLOCK (BLOCKVECTOR (symtab), i);
LA_ITERATE_OVER_SYMBOLS (block, name, domain,
iterate_inline_only, &cad);
}
}
}
}
}
}
/* Returns the block to be used for symbol searches for the given SYMTAB,
which may be NULL. */
static struct block *
get_search_block (struct symtab *symtab)
{
struct block *block;
if (symtab != NULL)
block = BLOCKVECTOR_BLOCK (BLOCKVECTOR (symtab), STATIC_BLOCK);
else
{
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;
}
/* A helper for find_method. This finds all methods in type T 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, const char *name,
VEC (const_char_ptr) **result_names,
VEC (typep) **superclasses)
{
int i1 = 0;
int ibase;
const 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)
{
int method_counter;
int name_len = strlen (name);
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);
char dem_opname[64];
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;
}
if (strcmp_iw (method_name, name) == 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);
VEC_safe_push (const_char_ptr, *result_names, phys_name);
}
}
}
}
for (ibase = 0; ibase < TYPE_N_BASECLASSES (t); ibase++)
VEC_safe_push (typep, *superclasses, 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>. */
static 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--;
}
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 (strncmp (s, needle, strlen (needle)) == 0)
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;
}
/* 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,
struct symtabs_and_lines *result,
VEC (const_char_ptr) *filters)
{
int i;
const char *name;
for (i = 0; VEC_iterate (const_char_ptr, filters, i, name); ++i)
{
struct linespec_sals lsal;
int j;
memset (&lsal, 0, sizeof (lsal));
for (j = 0; j < result->nelts; ++j)
{
if (strcmp (name, self->canonical_names[j]) == 0)
add_sal_to_sals_basic (&lsal.sals, &result->sals[j]);
}
if (lsal.sals.nelts > 0)
{
lsal.canonical = xstrdup (name);
VEC_safe_push (linespec_sals, self->canonical->sals, &lsal);
}
}
self->canonical->pre_expanded = 0;
}
/* Store RESULT into SELF->CANONICAL. */
static void
convert_results_to_lsals (struct linespec_state *self,
struct symtabs_and_lines *result)
{
struct linespec_sals lsal;
lsal.canonical = NULL;
lsal.sals = *result;
VEC_safe_push (linespec_sals, self->canonical->sals, &lsal);
}
/* 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,
struct symtabs_and_lines *result,
const char *select_mode)
{
const char *iter;
char *args, *prompt;
int i;
struct cleanup *old_chain;
VEC (const_char_ptr) *item_names = NULL, *filters = NULL;
struct get_number_or_range_state state;
gdb_assert (select_mode != multiple_symbols_all);
gdb_assert (self->canonical != NULL);
old_chain = make_cleanup (VEC_cleanup (const_char_ptr), &item_names);
make_cleanup (VEC_cleanup (const_char_ptr), &filters);
for (i = 0; i < result->nelts; ++i)
{
int j, found = 0;
const char *iter;
gdb_assert (self->canonical_names[i] != NULL);
for (j = 0; VEC_iterate (const_char_ptr, item_names, j, iter); ++j)
{
if (strcmp (iter, self->canonical_names[i]) == 0)
{
found = 1;
break;
}
}
if (!found)
VEC_safe_push (const_char_ptr, item_names, self->canonical_names[i]);
}
if (select_mode == multiple_symbols_cancel
&& VEC_length (const_char_ptr, item_names) > 1)
error (_("canceled because the command is ambiguous\n"
"See set/show multiple-symbol."));
if (select_mode == multiple_symbols_all
|| VEC_length (const_char_ptr, item_names) == 1)
{
do_cleanups (old_chain);
convert_results_to_lsals (self, result);
return;
}
/* Sort the list of method names alphabetically. */
qsort (VEC_address (const_char_ptr, item_names),
VEC_length (const_char_ptr, item_names),
sizeof (const_char_ptr), compare_strings);
printf_unfiltered (_("[0] cancel\n[1] all\n"));
for (i = 0; VEC_iterate (const_char_ptr, item_names, i, iter); ++i)
printf_unfiltered ("[%d] %s\n", i + 2, iter);
prompt = getenv ("PS2");
if (prompt == NULL)
{
prompt = "> ";
}
args = command_line_input (prompt, 0, "overload-choice");
if (args == 0 || *args == 0)
error_no_arg (_("one or more choice numbers"));
init_number_or_range (&state, args);
while (!state.finished)
{
int num;
num = get_number_or_range (&state);
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. */
do_cleanups (old_chain);
convert_results_to_lsals (self, result);
return;
}
num -= 2;
if (num >= VEC_length (const_char_ptr, item_names))
printf_unfiltered (_("No choice number %d.\n"), num);
else
{
const char *elt = VEC_index (const_char_ptr, item_names, num);
if (elt != NULL)
{
VEC_safe_push (const_char_ptr, filters, elt);
VEC_replace (const_char_ptr, item_names, num, NULL);
}
else
{
printf_unfiltered (_("duplicate request for %d ignored.\n"),
num);
}
}
}
filter_results (self, result, filters);
do_cleanups (old_chain);
}
/* 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 (char *symbol, 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)
{
char *string;
struct cleanup *cleanup;
string = copy_token_string (token);
cleanup = make_cleanup (xfree, string);
throw_error (GENERIC_ERROR,
_("malformed linespec error: unexpected %s, \"%s\""),
token_type_strings[token.type], string);
}
else
throw_error (GENERIC_ERROR,
_("malformed linespec error: unexpected %s"),
token_type_strings[token.type]);
}
/* Parse and return a line offset in STRING. */
static struct line_offset
linespec_parse_line_offset (char *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;
}
/* Right now, we only allow base 10 for offsets. */
line_offset.offset = atoi (string);
return line_offset;
}
/* Parse the basic_spec in PARSER's input. */
static void
linespec_parse_basic (linespec_parser *parser)
{
char *name;
linespec_token token;
VEC (symbolp) *symbols, *labels;
VEC (minsym_and_objfile_d) *minimal_symbols;
struct cleanup *cleanup;
/* Get the next token. */
token = linespec_lexer_lex_one (parser);
/* If it is EOI or KEYWORD, issue an error. */
if (token.type == LSTOKEN_KEYWORD || token.type == LSTOKEN_EOI)
unexpected_linespec_error (parser);
/* If it is a LSTOKEN_NUMBER, we have an offset. */
else if (token.type == LSTOKEN_NUMBER)
{
/* Record the line offset and get the next token. */
name = copy_token_string (token);
cleanup = make_cleanup (xfree, name);
PARSER_RESULT (parser)->line_offset = linespec_parse_line_offset (name);
do_cleanups (cleanup);
/* 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)
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)
unexpected_linespec_error (parser);
/* The current token will contain the name of a function, method,
or label. */
name = copy_token_string (token);
cleanup = make_cleanup (xfree, name);
/* Try looking it up as a function/method. */
find_linespec_symbols (PARSER_STATE (parser),
PARSER_RESULT (parser)->file_symtabs, name,
&symbols, &minimal_symbols);
if (symbols != NULL || minimal_symbols != NULL)
{
PARSER_RESULT (parser)->function_symbols = symbols;
PARSER_RESULT (parser)->minimal_symbols = minimal_symbols;
PARSER_RESULT (parser)->function_name = name;
symbols = NULL;
discard_cleanups (cleanup);
}
else
{
/* NAME was not a function or a method. So it must be a label
name. */
labels = find_label_symbols (PARSER_STATE (parser), NULL,
&symbols, name);
if (labels != NULL)
{
PARSER_RESULT (parser)->labels.label_symbols = labels;
PARSER_RESULT (parser)->labels.function_symbols = symbols;
PARSER_RESULT (parser)->label_name = name;
symbols = NULL;
discard_cleanups (cleanup);
}
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_RESULT (parser)->function_name = name;
discard_cleanups (cleanup);
return;
}
}
/* Get the next token. */
token = linespec_lexer_consume_token (parser);
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. */
name = copy_token_string (token);
cleanup = make_cleanup (xfree, name);
PARSER_RESULT (parser)->line_offset
= linespec_parse_line_offset (name);
do_cleanups (cleanup);
/* Ge the next token. */
token = linespec_lexer_consume_token (parser);
}
else if (token.type == LSTOKEN_STRING)
{
/* Grab a copy of the label's name and look it up. */
name = copy_token_string (token);
cleanup = make_cleanup (xfree, name);
labels = find_label_symbols (PARSER_STATE (parser),
PARSER_RESULT (parser)->function_symbols,
&symbols, name);
if (labels != NULL)
{
PARSER_RESULT (parser)->labels.label_symbols = labels;
PARSER_RESULT (parser)->labels.function_symbols = symbols;
PARSER_RESULT (parser)->label_name = name;
symbols = NULL;
discard_cleanups (cleanup);
}
else
{
/* We don't know what it was, but it isn't a label. */
throw_error (NOT_FOUND_ERROR,
_("No label \"%s\" defined in function \"%s\"."),
name, PARSER_RESULT (parser)->function_name);
}
/* Check for a line offset. */
token = linespec_lexer_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 lione offset and get the next token. */
name = copy_token_string (token);
cleanup = make_cleanup (xfree, name);
PARSER_RESULT (parser)->line_offset
= linespec_parse_line_offset (name);
do_cleanups (cleanup);
/* 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. */
static void
canonicalize_linespec (struct linespec_state *state, linespec_p ls)
{
/* If canonicalization was not requested, no need to do anything. */
if (!state->canonical)
return;
/* Shortcut expressions, which can only appear by themselves. */
if (ls->expression != NULL)
state->canonical->addr_string = xstrdup (ls->expression);
else
{
struct ui_file *buf;
int need_colon = 0;
buf = mem_fileopen ();
if (ls->source_filename)
{
fputs_unfiltered (ls->source_filename, buf);
need_colon = 1;
}
if (ls->function_name)
{
if (need_colon)
fputc_unfiltered (':', buf);
fputs_unfiltered (ls->function_name, buf);
need_colon = 1;
}
if (ls->label_name)
{
if (need_colon)
fputc_unfiltered (':', buf);
if (ls->function_name == NULL)
{
struct symbol *s;
/* No function was specified, so add the symbol name. */
gdb_assert (ls->labels.function_symbols != NULL
&& (VEC_length (symbolp, ls->labels.function_symbols)
== 1));
s = VEC_index (symbolp, ls->labels.function_symbols, 0);
fputs_unfiltered (SYMBOL_NATURAL_NAME (s), buf);
fputc_unfiltered (':', buf);
}
fputs_unfiltered (ls->label_name, buf);
need_colon = 1;
state->canonical->special_display = 1;
}
if (ls->line_offset.sign != LINE_OFFSET_UNKNOWN)
{
if (need_colon)
fputc_unfiltered (':', buf);
fprintf_filtered (buf, "%s%d",
(ls->line_offset.sign == LINE_OFFSET_NONE ? ""
: (ls->line_offset.sign
== LINE_OFFSET_PLUS ? "+" : "-")),
ls->line_offset.offset);
}
state->canonical->addr_string = ui_file_xstrdup (buf, NULL);
ui_file_delete (buf);
}
}
/* Given a line offset in LS, construct the relevant SALs. */
static struct symtabs_and_lines
create_sals_line_offset (struct linespec_state *self,
linespec_p ls)
{
struct symtabs_and_lines values;
struct symtab_and_line val;
int use_default = 0;
init_sal (&val);
values.sals = NULL;
values.nelts = 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 anme, since
set_default_source_symtab_and_line uses
select_source_symtab that calls us with such an argument. */
if (VEC_length (symtab_p, ls->file_symtabs) == 1
&& VEC_index (symtab_p, ls->file_symtabs, 0) == NULL)
{
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);
VEC_pop (symtab_p, ls->file_symtabs);
VEC_free (symtab_p, ls->file_symtabs);
ls->file_symtabs
= collect_symtabs_from_filename (self->default_symtab->filename);
use_default = 1;
}
val.line = ls->line_offset.offset;
switch (ls->line_offset.sign)
{
case LINE_OFFSET_PLUS:
if (ls->line_offset.offset == 0)
val.line = 5;
if (use_default)
val.line = self->default_line + val.line;
break;
case LINE_OFFSET_MINUS:
if (ls->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. */
}
if (self->list_mode)
decode_digits_list_mode (self, ls, &values, val);
else
{
struct linetable_entry *best_entry = NULL;
int *filter;
struct block **blocks;
struct cleanup *cleanup;
struct symtabs_and_lines intermediate_results;
int i, j;
intermediate_results.sals = NULL;
intermediate_results.nelts = 0;
decode_digits_ordinary (self, ls, val.line, &intermediate_results,
&best_entry);
if (intermediate_results.nelts == 0 && best_entry != NULL)
decode_digits_ordinary (self, ls, best_entry->line,
&intermediate_results, &best_entry);
cleanup = make_cleanup (xfree, intermediate_results.sals);
/* 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. */
filter = XNEWVEC (int, intermediate_results.nelts);
make_cleanup (xfree, filter);
blocks = XNEWVEC (struct block *, intermediate_results.nelts);
make_cleanup (xfree, blocks);
for (i = 0; i < intermediate_results.nelts; ++i)
{
set_current_program_space (intermediate_results.sals[i].pspace);
filter[i] = 1;
blocks[i] = block_for_pc_sect (intermediate_results.sals[i].pc,
intermediate_results.sals[i].section);
}
for (i = 0; i < intermediate_results.nelts; ++i)
{
if (blocks[i] != NULL)
for (j = i + 1; j < intermediate_results.nelts; ++j)
{
if (blocks[j] == blocks[i])
{
filter[j] = 0;
break;
}
}
}
for (i = 0; i < intermediate_results.nelts; ++i)
if (filter[i])
{
struct symbol *sym = (blocks[i]
? block_containing_function (blocks[i])
: NULL);
if (self->funfirstline)
skip_prologue_sal (&intermediate_results.sals[i]);
/* Make sure the line matches the request, not what was
found. */
intermediate_results.sals[i].line = val.line;
add_sal_to_sals (self, &values, &intermediate_results.sals[i],
sym ? SYMBOL_NATURAL_NAME (sym) : NULL);
}
do_cleanups (cleanup);
}
if (values.nelts == 0)
{
if (ls->source_filename)
throw_error (NOT_FOUND_ERROR, _("No line %d in file \"%s\"."),
val.line, ls->source_filename);
else
throw_error (NOT_FOUND_ERROR, _("No line %d in the current file."),
val.line);
}
return values;
}
/* Create and return SALs from the linespec LS. */
static struct symtabs_and_lines
convert_linespec_to_sals (struct linespec_state *state, linespec_p ls)
{
struct symtabs_and_lines sals = {NULL, 0};
if (ls->expression != NULL)
{
/* We have an expression. No other attribute is allowed. */
sals.sals = XMALLOC (struct symtab_and_line);
sals.nelts = 1;
sals.sals[0] = find_pc_line (ls->expr_pc, 0);
sals.sals[0].pc = ls->expr_pc;
sals.sals[0].section = find_pc_overlay (ls->expr_pc);
sals.sals[0].explicit_pc = 1;
}
else if (ls->labels.label_symbols != NULL)
{
/* We have just a bunch of functions/methods or labels. */
int i;
struct symtab_and_line sal;
struct symbol *sym;
for (i = 0; VEC_iterate (symbolp, ls->labels.label_symbols, i, sym); ++i)
{
if (symbol_to_sal (&sal, state->funfirstline, sym))
add_sal_to_sals (state, &sals, &sal,
SYMBOL_NATURAL_NAME (sym));
}
}
else if (ls->function_symbols != NULL || ls->minimal_symbols != NULL)
{
/* We have just a bunch of functions and/or methods. */
int i;
struct symtab_and_line sal;
struct symbol *sym;
minsym_and_objfile_d *elem;
struct program_space *pspace;
if (ls->function_symbols != NULL)
{
/* Sort symbols so that symbols with the same program space are next
to each other. */
qsort (VEC_address (symbolp, ls->function_symbols),
VEC_length (symbolp, ls->function_symbols),
sizeof (symbolp), compare_symbols);
for (i = 0; VEC_iterate (symbolp, ls->function_symbols, i, sym); ++i)
{
pspace = SYMTAB_PSPACE (SYMBOL_SYMTAB (sym));
set_current_program_space (pspace);
if (symbol_to_sal (&sal, state->funfirstline, sym)
&& maybe_add_address (state->addr_set, pspace, sal.pc))
add_sal_to_sals (state, &sals, &sal, SYMBOL_NATURAL_NAME (sym));
}
}
if (ls->minimal_symbols != NULL)
{
/* Sort minimal symbols by program space, too. */
qsort (VEC_address (minsym_and_objfile_d, ls->minimal_symbols),
VEC_length (minsym_and_objfile_d, ls->minimal_symbols),
sizeof (minsym_and_objfile_d), compare_msymbols);
for (i = 0;
VEC_iterate (minsym_and_objfile_d, ls->minimal_symbols, i, elem);
++i)
{
pspace = elem->objfile->pspace;
set_current_program_space (pspace);
minsym_found (state, elem->objfile, elem->minsym, &sals);
}
}
}
else if (ls->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->source_filename == NULL)
ls->source_filename = xstrdup (state->default_symtab->filename);
}
else
{
/* We haven't found any results... */
return sals;
}
canonicalize_linespec (state, ls);
if (sals.nelts > 0 && state->canonical != NULL)
state->canonical->pre_expanded = 1;
return sals;
}
/* Parse a string that specifies a linespec.
Pass the address of a char * variable; that variable will be
advanced over the characters actually parsed.
The basic grammar of linespecs:
linespec -> expr_spec | var_spec | basic_spec
expr_spec -> '*' STRING
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 ARGPTR. */
static struct symtabs_and_lines
parse_linespec (linespec_parser *parser, char **argptr)
{
linespec_token token;
struct symtabs_and_lines values;
volatile struct gdb_exception file_exception;
struct cleanup *cleanup;
/* 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 (!is_ada_operator (*argptr)
&& strchr (linespec_quote_characters, **argptr) != NULL)
{
const char *end;
end = skip_quote_char (*argptr + 1, **argptr);
if (end != NULL && is_closing_quote_enclosed (end))
{
/* Here's the special case. Skip ARGPTR past the initial
quote. */
++(*argptr);
parser->is_quote_enclosed = 1;
}
}
parser->lexer.saved_arg = *argptr;
parser->lexer.stream = argptr;
file_exception.reason = 0;
/* Initialize the default symtab and line offset. */
initialize_defaults (&PARSER_STATE (parser)->default_symtab,
&PARSER_STATE (parser)->default_line);
/* Objective-C shortcut. */
values = decode_objc (PARSER_STATE (parser), PARSER_RESULT (parser), argptr);
if (values.sals != NULL)
return values;
/* Start parsing. */
/* Get the first token. */
token = linespec_lexer_lex_one (parser);
/* It must be either LSTOKEN_STRING or LSTOKEN_NUMBER. */
if (token.type == LSTOKEN_STRING && *LS_TOKEN_STOKEN (token).ptr == '*')
{
char *expr, *copy;
/* User specified an expression, *EXPR. */
copy = expr = copy_token_string (token);
cleanup = make_cleanup (xfree, expr);
PARSER_RESULT (parser)->expr_pc = linespec_expression_to_pc (&copy);
discard_cleanups (cleanup);
PARSER_RESULT (parser)->expression = expr;
/* This is a little hacky/tricky. If linespec_expression_to_pc
did not evaluate the entire token, then we must find the
string COPY inside the original token buffer. */
if (*copy != '\0')
{
PARSER_STREAM (parser) = strstr (parser->lexer.saved_arg, copy);
gdb_assert (PARSER_STREAM (parser) != NULL);
}
/* Consume the token. */
linespec_lexer_consume_token (parser);
goto convert_to_sals;
}
else if (token.type == LSTOKEN_STRING && *LS_TOKEN_STOKEN (token).ptr == '$')
{
char *var;
/* A NULL entry means to use GLOBAL_DEFAULT_SYMTAB. */
VEC_safe_push (symtab_p, PARSER_RESULT (parser)->file_symtabs, NULL);
/* User specified a convenience variable or history value. */
var = copy_token_string (token);
cleanup = make_cleanup (xfree, var);
PARSER_RESULT (parser)->line_offset
= linespec_parse_variable (PARSER_STATE (parser), var);
/* If a line_offset wasn't found (VAR is the name of a user
variable/function), then skip to normal symbol processing. */
if (PARSER_RESULT (parser)->line_offset.sign != LINE_OFFSET_UNKNOWN)
{
discard_cleanups (cleanup);
/* Consume this token. */
linespec_lexer_consume_token (parser);
goto convert_to_sals;
}
do_cleanups (cleanup);
}
else if (token.type != LSTOKEN_STRING && token.type != LSTOKEN_NUMBER)
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)
{
char *user_filename;
/* Get the current token again and extract the filename. */
token = linespec_lexer_lex_one (parser);
user_filename = copy_token_string (token);
/* Check if the input is a filename. */
TRY_CATCH (file_exception, RETURN_MASK_ERROR)
{
PARSER_RESULT (parser)->file_symtabs
= symtabs_from_filename (user_filename);
}
if (file_exception.reason >= 0)
{
/* Symtabs were found for the file. Record the filename. */
PARSER_RESULT (parser)->source_filename = user_filename;
/* Get the next token. */
token = linespec_lexer_consume_token (parser);
/* This is LSTOKEN_COLON; consume it. */
linespec_lexer_consume_token (parser);
}
else
{
/* No symtabs found -- discard user_filename. */
xfree (user_filename);
/* A NULL entry means to use GLOBAL_DEFAULT_SYMTAB. */
VEC_safe_push (symtab_p, PARSER_RESULT (parser)->file_symtabs, NULL);
}
}
/* If the next token is not EOI, KEYWORD, or COMMA, issue an error. */
else if (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. */
VEC_safe_push (symtab_p, PARSER_RESULT (parser)->file_symtabs, NULL);
}
/* Parse the rest of the linespec. */
linespec_parse_basic (parser);
if (PARSER_RESULT (parser)->function_symbols == NULL
&& PARSER_RESULT (parser)->labels.label_symbols == NULL
&& PARSER_RESULT (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_RESULT (parser)->function_name,
PARSER_RESULT (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)
PARSER_STREAM (parser) = LS_TOKEN_STOKEN (token).ptr;
/* Convert the data in PARSER_RESULT to SALs. */
values = convert_linespec_to_sals (PARSER_STATE (parser),
PARSER_RESULT (parser));
return values;
}
/* A constructor for linespec_state. */
static void
linespec_state_constructor (struct linespec_state *self,
int flags, const struct language_defn *language,
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->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);
}
/* Initialize a new linespec parser. */
static void
linespec_parser_new (linespec_parser *parser,
int flags, const struct language_defn *language,
struct symtab *default_symtab,
int default_line,
struct linespec_result *canonical)
{
parser->lexer.current.type = LSTOKEN_CONSUMED;
memset (PARSER_RESULT (parser), 0, sizeof (struct linespec));
PARSER_RESULT (parser)->line_offset.sign = LINE_OFFSET_UNKNOWN;
linespec_state_constructor (PARSER_STATE (parser), flags, language,
default_symtab, default_line, canonical);
}
/* A destructor for linespec_state. */
static void
linespec_state_destructor (struct linespec_state *self)
{
htab_delete (self->addr_set);
}
/* Delete a linespec parser. */
static void
linespec_parser_delete (void *arg)
{
linespec_parser *parser = (linespec_parser *) arg;
if (PARSER_RESULT (parser)->expression)
xfree (PARSER_RESULT (parser)->expression);
if (PARSER_RESULT (parser)->source_filename)
xfree (PARSER_RESULT (parser)->source_filename);
if (PARSER_RESULT (parser)->label_name)
xfree (PARSER_RESULT (parser)->label_name);
if (PARSER_RESULT (parser)->function_name)
xfree (PARSER_RESULT (parser)->function_name);
if (PARSER_RESULT (parser)->file_symtabs != NULL)
VEC_free (symtab_p, PARSER_RESULT (parser)->file_symtabs);
if (PARSER_RESULT (parser)->function_symbols != NULL)
VEC_free (symbolp, PARSER_RESULT (parser)->function_symbols);
if (PARSER_RESULT (parser)->minimal_symbols != NULL)
VEC_free (minsym_and_objfile_d, PARSER_RESULT (parser)->minimal_symbols);
if (PARSER_RESULT (parser)->labels.label_symbols != NULL)
VEC_free (symbolp, PARSER_RESULT (parser)->labels.label_symbols);
if (PARSER_RESULT (parser)->labels.function_symbols != NULL)
VEC_free (symbolp, PARSER_RESULT (parser)->labels.function_symbols);
linespec_state_destructor (PARSER_STATE (parser));
}
/* See linespec.h. */
void
decode_line_full (char **argptr, int flags,
struct symtab *default_symtab,
int default_line, struct linespec_result *canonical,
const char *select_mode,
const char *filter)
{
struct symtabs_and_lines result;
struct cleanup *cleanups;
char *arg_start = *argptr;
VEC (const_char_ptr) *filters = NULL;
linespec_parser parser;
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_new (&parser, flags, current_language, default_symtab,
default_line, canonical);
cleanups = make_cleanup (linespec_parser_delete, &parser);
save_current_program_space ();
result = parse_linespec (&parser, argptr);
state = PARSER_STATE (&parser);
gdb_assert (result.nelts == 1 || canonical->pre_expanded);
gdb_assert (canonical->addr_string != NULL);
canonical->pre_expanded = 1;
/* Fill in the missing canonical names. */
if (result.nelts > 0)
{
int i;
if (state->canonical_names == NULL)
state->canonical_names = xcalloc (result.nelts, sizeof (char *));
make_cleanup (xfree, state->canonical_names);
for (i = 0; i < result.nelts; ++i)
{
if (state->canonical_names[i] == NULL)
state->canonical_names[i] = savestring (arg_start,
*argptr - arg_start);
make_cleanup (xfree, state->canonical_names[i]);
}
}
if (select_mode == NULL)
{
if (ui_out_is_mi_like_p (interp_ui_out (top_level_interpreter ())))
select_mode = multiple_symbols_all;
else
select_mode = multiple_symbols_select_mode ();
}
if (select_mode == multiple_symbols_all)
{
if (filter != NULL)
{
make_cleanup (VEC_cleanup (const_char_ptr), &filters);
VEC_safe_push (const_char_ptr, filters, filter);
filter_results (state, &result, filters);
}
else
convert_results_to_lsals (state, &result);
}
else
decode_line_2 (state, &result, select_mode);
do_cleanups (cleanups);
}
/* See linespec.h. */
struct symtabs_and_lines
decode_line_1 (char **argptr, int flags,
struct symtab *default_symtab,
int default_line)
{
struct symtabs_and_lines result;
linespec_parser parser;
struct cleanup *cleanups;
linespec_parser_new (&parser, flags, current_language, default_symtab,
default_line, NULL);
cleanups = make_cleanup (linespec_parser_delete, &parser);
save_current_program_space ();
result = parse_linespec (&parser, argptr);
do_cleanups (cleanups);
return result;
}
/* See linespec.h. */
struct symtabs_and_lines
decode_line_with_current_source (char *string, int flags)
{
struct symtabs_and_lines sals;
struct symtab_and_line cursal;
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! */
cursal = get_current_source_symtab_and_line ();
sals = decode_line_1 (&string, flags,
cursal.symtab, cursal.line);
if (*string)
error (_("Junk at end of line specification: %s"), string);
return sals;
}
/* See linespec.h. */
struct symtabs_and_lines
decode_line_with_last_displayed (char *string, int flags)
{
struct symtabs_and_lines sals;
if (string == 0)
error (_("Empty line specification."));
if (last_displayed_sal_is_valid ())
sals = decode_line_1 (&string, flags,
get_last_displayed_symtab (),
get_last_displayed_line ());
else
sals = decode_line_1 (&string, flags, (struct symtab *) NULL, 0);
if (*string)
error (_("Junk at end of line specification: %s"), string);
return sals;
}
/* 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;
}
}
/* Evaluate the expression pointed to by EXP_PTR into a CORE_ADDR,
advancing EXP_PTR past any parsed text. */
static CORE_ADDR
linespec_expression_to_pc (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));
}
/* 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 struct symtabs_and_lines
decode_objc (struct linespec_state *self, linespec_p ls, char **argptr)
{
struct collect_info info;
VEC (const_char_ptr) *symbol_names = NULL;
struct symtabs_and_lines values;
char *new_argptr;
struct cleanup *cleanup = make_cleanup (VEC_cleanup (const_char_ptr),
&symbol_names);
info.state = self;
info.file_symtabs = NULL;
VEC_safe_push (symtab_p, info.file_symtabs, NULL);
make_cleanup (VEC_cleanup (symtab_p), &info.file_symtabs);
info.result.symbols = NULL;
info.result.minimal_symbols = NULL;
values.nelts = 0;
values.sals = NULL;
new_argptr = find_imps (*argptr, &symbol_names);
if (VEC_empty (const_char_ptr, symbol_names))
{
do_cleanups (cleanup);
return values;
}
add_all_symbol_names_from_pspace (&info, NULL, symbol_names);
if (!VEC_empty (symbolp, info.result.symbols)
|| !VEC_empty (minsym_and_objfile_d, info.result.minimal_symbols))
{
char *saved_arg;
saved_arg = alloca (new_argptr - *argptr + 1);
memcpy (saved_arg, *argptr, new_argptr - *argptr);
saved_arg[new_argptr - *argptr] = '\0';
ls->function_symbols = info.result.symbols;
ls->minimal_symbols = info.result.minimal_symbols;
values = convert_linespec_to_sals (self, ls);
if (self->canonical)
{
self->canonical->pre_expanded = 1;
if (ls->source_filename)
self->canonical->addr_string
= xstrprintf ("%s:%s", ls->source_filename, saved_arg);
else
self->canonical->addr_string = xstrdup (saved_arg);
}
}
*argptr = new_argptr;
do_cleanups (cleanup);
return values;
}
/* An instance of this type is used when collecting prefix symbols for
decode_compound. */
struct decode_compound_collector
{
/* The result vector. */
VEC (symbolp) *symbols;
/* A hash table of all symbols we found. We use this to avoid
adding any symbol more than once. */
htab_t unique_syms;
};
/* A callback for iterate_over_symbols that is used by
lookup_prefix_sym to collect type symbols. */
static int
collect_one_symbol (struct symbol *sym, void *d)
{
struct decode_compound_collector *collector = d;
void **slot;
struct type *t;
if (SYMBOL_CLASS (sym) != LOC_TYPEDEF)
return 1; /* Continue iterating. */
t = SYMBOL_TYPE (sym);
CHECK_TYPEDEF (t);
if (TYPE_CODE (t) != TYPE_CODE_STRUCT
&& TYPE_CODE (t) != TYPE_CODE_UNION
&& TYPE_CODE (t) != TYPE_CODE_NAMESPACE)
return 1; /* Continue iterating. */
slot = htab_find_slot (collector->unique_syms, sym, INSERT);
if (!*slot)
{
*slot = sym;
VEC_safe_push (symbolp, collector->symbols, sym);
}
return 1; /* Continue iterating. */
}
/* Return any symbols corresponding to CLASS_NAME in FILE_SYMTABS. */
static VEC (symbolp) *
lookup_prefix_sym (struct linespec_state *state, VEC (symtab_p) *file_symtabs,
const char *class_name)
{
int ix;
struct symtab *elt;
struct decode_compound_collector collector;
struct cleanup *outer;
struct cleanup *cleanup;
collector.symbols = NULL;
outer = make_cleanup (VEC_cleanup (symbolp), &collector.symbols);
collector.unique_syms = htab_create_alloc (1, htab_hash_pointer,
htab_eq_pointer, NULL,
xcalloc, xfree);
cleanup = make_cleanup_htab_delete (collector.unique_syms);
for (ix = 0; VEC_iterate (symtab_p, file_symtabs, ix, elt); ++ix)
{
if (elt == NULL)
{
iterate_over_all_matching_symtabs (state, class_name, STRUCT_DOMAIN,
collect_one_symbol, &collector,
NULL, 0);
iterate_over_all_matching_symtabs (state, class_name, VAR_DOMAIN,
collect_one_symbol, &collector,
NULL, 0);
}
else
{
struct block *search_block;
/* 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));
search_block = get_search_block (elt);
LA_ITERATE_OVER_SYMBOLS (search_block, class_name, STRUCT_DOMAIN,
collect_one_symbol, &collector);
LA_ITERATE_OVER_SYMBOLS (search_block, class_name, VAR_DOMAIN,
collect_one_symbol, &collector);
}
}
do_cleanups (cleanup);
discard_cleanups (outer);
return collector.symbols;
}
/* A qsort 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 int
compare_symbols (const void *a, const void *b)
{
struct symbol * const *sa = a;
struct symbol * const *sb = b;
uintptr_t uia, uib;
uia = (uintptr_t) SYMTAB_PSPACE (SYMBOL_SYMTAB (*sa));
uib = (uintptr_t) SYMTAB_PSPACE (SYMBOL_SYMTAB (*sb));
if (uia < uib)
return -1;
if (uia > uib)
return 1;
uia = (uintptr_t) *sa;
uib = (uintptr_t) *sb;
if (uia < uib)
return -1;
if (uia > uib)
return 1;
return 0;
}
/* Like compare_symbols but for minimal symbols. */
static int
compare_msymbols (const void *a, const void *b)
{
const struct minsym_and_objfile *sa = a;
const struct minsym_and_objfile *sb = b;
uintptr_t uia, uib;
uia = (uintptr_t) sa->objfile->pspace;
uib = (uintptr_t) sa->objfile->pspace;
if (uia < uib)
return -1;
if (uia > uib)
return 1;
uia = (uintptr_t) sa->minsym;
uib = (uintptr_t) sb->minsym;
if (uia < uib)
return -1;
if (uia > uib)
return 1;
return 0;
}
/* 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,
VEC (const_char_ptr) *names)
{
int ix;
const char *iter;
for (ix = 0; VEC_iterate (const_char_ptr, names, ix, iter); ++ix)
add_matching_symbols_to_info (iter, info, pspace);
}
static void
find_superclass_methods (VEC (typep) *superclasses,
const char *name,
VEC (const_char_ptr) **result_names)
{
int old_len = VEC_length (const_char_ptr, *result_names);
VEC (typep) *iter_classes;
struct cleanup *cleanup = make_cleanup (null_cleanup, NULL);
iter_classes = superclasses;
while (1)
{
VEC (typep) *new_supers = NULL;
int ix;
struct type *t;
make_cleanup (VEC_cleanup (typep), &new_supers);
for (ix = 0; VEC_iterate (typep, iter_classes, ix, t); ++ix)
find_methods (t, name, result_names, &new_supers);
if (VEC_length (const_char_ptr, *result_names) != old_len
|| VEC_empty (typep, new_supers))
break;
iter_classes = new_supers;
}
do_cleanups (cleanup);
}
/* 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, VEC (symtab_p) *file_symtabs,
const char *class_name, const char *method_name,
VEC (symbolp) *sym_classes, VEC (symbolp) **symbols,
VEC (minsym_and_objfile_d) **minsyms)
{
struct symbol *sym;
struct cleanup *cleanup = make_cleanup (null_cleanup, NULL);
int ix;
int last_result_len;
VEC (typep) *superclass_vec;
VEC (const_char_ptr) *result_names;
struct collect_info info;
/* Sort symbols so that symbols with the same program space are next
to each other. */
qsort (VEC_address (symbolp, sym_classes),
VEC_length (symbolp, sym_classes),
sizeof (symbolp),
compare_symbols);
info.state = self;
info.file_symtabs = file_symtabs;
info.result.symbols = NULL;
info.result.minimal_symbols = NULL;
/* 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. */
superclass_vec = NULL;
make_cleanup (VEC_cleanup (typep), &superclass_vec);
result_names = NULL;
make_cleanup (VEC_cleanup (const_char_ptr), &result_names);
last_result_len = 0;
for (ix = 0; VEC_iterate (symbolp, sym_classes, ix, sym); ++ix)
{
struct type *t;
struct program_space *pspace;
/* Program spaces that are executing startup should have
been filtered out earlier. */
gdb_assert (!SYMTAB_PSPACE (SYMBOL_SYMTAB (sym))->executing_startup);
pspace = SYMTAB_PSPACE (SYMBOL_SYMTAB (sym));
set_current_program_space (pspace);
t = check_typedef (SYMBOL_TYPE (sym));
find_methods (t, 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 == VEC_length (symbolp, sym_classes) - 1
|| (pspace
!= SYMTAB_PSPACE (SYMBOL_SYMTAB (VEC_index (symbolp, sym_classes,
ix + 1)))))
{
/* If we did not find a direct implementation anywhere in
this program space, consider superclasses. */
if (VEC_length (const_char_ptr, result_names) == last_result_len)
find_superclass_methods (superclass_vec, method_name,
&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);
VEC_truncate (typep, superclass_vec, 0);
last_result_len = VEC_length (const_char_ptr, result_names);
}
}
if (!VEC_empty (symbolp, info.result.symbols)
|| !VEC_empty (minsym_and_objfile_d, info.result.minimal_symbols))
{
*symbols = info.result.symbols;
*minsyms = info.result.minimal_symbols;
do_cleanups (cleanup);
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"));
}
/* This object is used when collecting all matching symtabs. */
struct symtab_collector
{
/* The result vector of symtabs. */
VEC (symtab_p) *symtabs;
/* This is used to ensure the symtabs are unique. */
htab_t symtab_table;
};
/* Callback for iterate_over_symtabs. */
static int
add_symtabs_to_list (struct symtab *symtab, void *d)
{
struct symtab_collector *data = d;
void **slot;
slot = htab_find_slot (data->symtab_table, symtab, INSERT);
if (!*slot)
{
*slot = symtab;
VEC_safe_push (symtab_p, data->symtabs, symtab);
}
return 0;
}
/* Given a file name, return a VEC of all matching symtabs. */
static VEC (symtab_p) *
collect_symtabs_from_filename (const char *file)
{
struct symtab_collector collector;
struct cleanup *cleanups;
struct program_space *pspace;
collector.symtabs = NULL;
collector.symtab_table = htab_create (1, htab_hash_pointer, htab_eq_pointer,
NULL);
cleanups = make_cleanup_htab_delete (collector.symtab_table);
/* Find that file's data. */
ALL_PSPACES (pspace)
{
if (pspace->executing_startup)
continue;
set_current_program_space (pspace