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/* Parser for linespec for the GNU debugger, GDB.
Copyright (C) 1986-2021 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 "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 "gdbsupport/function-view.h"
#include "gdbsupport/def-vector.h"
#include <algorithm>
#include "inferior.h"
/* 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,
/* A function/method name. Due to ambiguity between
(gdb) b source[TAB]
source_file.c
source_function
this can also indicate a source filename, iff we haven't seen a
separate source filename component, as in "b source.c:function". */
FUNCTION,
/* A label symbol. E.g., break file.c:function:LABEL. */
LABEL,
/* An expression. E.g., "break foo if EXPR", or "break *EXPR". */
EXPRESSION,
/* A linespec keyword ("if"/"thread"/"task"/"-force-condition").
E.g., "break func threa<tab>". */
KEYWORD,
};
/* 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 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 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;
};
/* A canonical linespec represented as a symtab-related string.
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. */
struct linespec_canonical_name
{
/* Remaining text part of the linespec string. */
char *suffix;
/* If NULL then SUFFIX is the whole linespec string. */
struct symtab *symtab;
};
/* 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;
/* If not NULL, the search is restricted to just this program
space. */
struct program_space *search_pspace;
/* 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 std::vector<symtab_and_line> result. */
struct linespec_canonical_name *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;
/* Are we building a linespec? */
int is_linespec;
};
/* 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. */
std::vector<symtab *> *file_symtabs;
/* The result being accumulated. */
struct
{
std::vector<block_symbol> *symbols;
std::vector<bound_minimal_symbol> *minimal_symbols;
} result;
/* Possibly add a symbol to the results. */
virtual bool add_symbol (block_symbol *bsym);
};
bool
collect_info::add_symbol (block_symbol *bsym)
{
/* 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);
/* Continue iterating. */
return true;
}
/* Custom collect_info for symbol_searcher. */
struct symbol_searcher_collect_info
: collect_info
{
bool add_symbol (block_symbol *bsym) override
{
/* Add everything. */
this->result.symbols->push_back (*bsym);
/* Continue iterating. */
return true;
}
};
/* 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. This is NULL-terminated so that it can be used
as enum completer. */
const char * const linespec_keywords[] = { "if", "thread", "task", "-force-condition", NULL };
#define IF_KEYWORD_INDEX 0
#define FORCE_KEYWORD_INDEX 3
/* A token of the linespec lexer */
struct linespec_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;
};
#define LS_TOKEN_STOKEN(TOK) (TOK).data.string
#define LS_TOKEN_KEYWORD(TOK) (TOK).data.keyword
/* An instance of the linespec parser. */
struct 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);
~linespec_parser ();
DISABLE_COPY_AND_ASSIGN (linespec_parser);
/* Lexer internal data */
struct
{
/* Save head of input stream. */
const char *saved_arg;
/* Head of the input stream. */
const 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 = 0;
/* 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)
/* What the parser believes the current word point should complete
to. */
linespec_complete_what complete_what = linespec_complete_what::NOTHING;
/* 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;
/* If the current token was a quoted string, then this is the
quoting character (either " or '). */
int completion_quote_char = 0;
/* If the current token was a quoted string, then this points at the
end of the quoted string. */
const char *completion_quote_end = nullptr;
/* If parsing for completion, then this points at the completion
tracker. Otherwise, this is NULL. */
struct completion_tracker *completion_tracker = nullptr;
};
/* A convenience macro for accessing the explicit location result of
the parser. */
#define PARSER_EXPLICIT(PPTR) (&PARSER_RESULT ((PPTR))->explicit_loc)
/* Prototypes for local functions. */
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);
static void initialize_defaults (struct symtab **default_symtab,
int *default_line);
CORE_ADDR linespec_expression_to_pc (const char **exp_ptr);
static std::vector<symtab_and_line> decode_objc (struct linespec_state *self,
linespec *ls,
const char *arg);
static std::vector<symtab *> symtabs_from_filename
(const char *, struct program_space *pspace);
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);
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);
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,
symbol_name_match_type name_match_type,
enum search_domain search_domain,
struct collect_info *info,
struct program_space *pspace);
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);
static std::vector<symtab *>
collect_symtabs_from_filename (const char *file,
struct program_space *pspace);
static std::vector<symtab_and_line> decode_digits_ordinary
(struct linespec_state *self,
linespec *ls,
int line,
linetable_entry **best_entry);
static std::vector<symtab_and_line> decode_digits_list_mode
(struct linespec_state *self,
linespec *ls,
struct symtab_and_line val);
static void minsym_found (struct linespec_state *self, struct objfile *objfile,
struct minimal_symbol *msymbol,
std::vector<symtab_and_line> *result);
static bool compare_symbols (const block_symbol &a, const block_symbol &b);
static bool compare_msymbols (const bound_minimal_symbol &a,
const bound_minimal_symbol &b);
/* 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 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, 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)))
{
PARSER_STREAM (parser) = LS_TOKEN_STOKEN (*tokenp).ptr;
return 0;
}
return 1;
}
/* See linespec.h. */
const char *
linespec_lexer_lex_keyword (const char *p)
{
int i;
if (p != NULL)
{
for (i = 0; linespec_keywords[i] != NULL; ++i)
{
int len = strlen (linespec_keywords[i]);
/* If P begins with
- "thread" or "task" 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.
- "-force-condition", the next character may be EOF
since this keyword does not take any arguments. Otherwise,
it should be followed by a keyword.
- "if", ALWAYS stop 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 (strncmp (p, linespec_keywords[i], len) == 0)
{
int j;
if (i == FORCE_KEYWORD_INDEX && p[len] == '\0')
return linespec_keywords[i];
if (!isspace (p[len]))
continue;
if (i == FORCE_KEYWORD_INDEX)
{
p += len;
p = skip_spaces (p);
for (j = 0; linespec_keywords[j] != NULL; ++j)
{
int nextlen = strlen (linespec_keywords[j]);
if (strncmp (p, linespec_keywords[j], nextlen) == 0
&& isspace (p[nextlen]))
return linespec_keywords[i];
}
}
else if (i != IF_KEYWORD_INDEX)
{
/* We matched a "thread" or "task". */
p += len;
p = skip_spaces (p);
for (j = 0; linespec_keywords[j] != NULL; ++j)
{
int nextlen = strlen (linespec_keywords[j]);
if (strncmp (p, linespec_keywords[j], nextlen) == 0
&& isspace (p[nextlen]))
return NULL;
}
}
return linespec_keywords[i];
}
}
}
return NULL;
}
/* See description in linespec.h. */
int
is_ada_operator (const char *string)
{
const struct ada_opname_map *mapping;
for (mapping = ada_opname_table;
mapping->encoded != NULL
&& !startswith (string, mapping->decoded); ++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 gdb::unique_xmalloc_ptr<char>
copy_token_string (linespec_token token)
{
const char *str, *s;
if (token.type == LSTOKEN_KEYWORD)
return make_unique_xstrdup (LS_TOKEN_KEYWORD (token));
str = LS_TOKEN_STOKEN (token).ptr;
s = remove_trailing_whitespace (str, str + LS_TOKEN_STOKEN (token).length);
return gdb::unique_xmalloc_ptr<char> (savestring (str, s - 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 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 = input;
depth = 0;
while (*p)
{
if (*p == start_char)
++depth;
else if (*p == end_char)
{
if (--depth == 0)
{
++p;
break;
}
}
++p;
}
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)
{
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;
}
return -1;
}
/* Lex a string from the input in PARSER. */
static linespec_token
linespec_lexer_lex_string (linespec_parser *parser)
{
linespec_token token;
const 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);
/* 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"))
{
/* Nothing. */
}
/* 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. */
gdb_assert (*(PARSER_STREAM (parser)) != '\0');
++(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
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)
{
for (struct program_space *pspace : program_spaces)
{
if (search_pspace != NULL && search_pspace != pspace)
continue;
if (pspace->executing_startup)
continue;
set_current_program_space (pspace);
for (objfile *objfile : current_program_space->objfiles ())
{
objfile->expand_symtabs_matching (NULL, &lookup_name, NULL, NULL,
(SEARCH_GLOBAL_BLOCK
| SEARCH_STATIC_BLOCK),
UNDEF_DOMAIN,
search_domain);
for (compunit_symtab *cu : objfile->compunits ())
{
struct symtab *symtab = COMPUNIT_FILETABS (cu);
iterate_over_file_blocks (symtab, lookup_name, name_domain,
callback);
if (include_inline)
{
const 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->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)
{
/* get_selected_block can change the current language when there is
no selected frame yet. */
scoped_restore_current_language save_language;
return get_selected_block (0);
}
/* 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)
{
const struct block *block;
for (block = BLOCKVECTOR_BLOCK (SYMTAB_BLOCKVECTOR (symtab), STATIC_BLOCK);
block != NULL;
block = BLOCK_SUPERBLOCK (block))
current_language->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 = t->name ();
/* 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
= language_def (t_lang)->get_symbol_name_matcher (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))
{
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 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)
{
const 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);
}
/* 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 *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 (s.symbol->natural_name ());
}
}
/* 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 *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)
{
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);
*ls->file_symtabs
= collect_symtabs_from_filename (self->default_symtab->filename,
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 ? sym->natural_name () : 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 *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,
sym.symbol->natural_name (), 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
= elem.objfile->arch ();
msym_addr
= (gdbarch_convert_from_func_ptr_addr
(gdbarch,
msym_addr,
current_inferior ()->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,
sym.symbol->natural_name (), 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 *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 (const gdb_exception_error &except)
{
source_file_not_found_error (source_filename);
}
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 *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;
/* 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 (gdb_exception_error &ex)
{
file_exception = std::move (ex);
}
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 (std::move (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::FUNCTIO