gdb
PR breakpoints/11816: * linespec.c (decode_line_1): Parse `function:label' linespecs. (decode_compound): Update. (find_function_symbol): New function. (decode_dollar): Update. (decode_label): Add 'function_symbol' parameter. Handle function-relative labels. (decode_variable): Update. (symbol_found): Add 'function_symbol' parameter. Use label's PC, not its line. Set `special_display' and canonical name for labels. gdb/doc * gdb.texinfo (Specify Location): Document `function:label' linespec. gdb/testsuite * gdb.base/label.exp: Use `main:there' linespec. Add re-running test.
This commit is contained in:
Tom Tromey
parent
56435ebec8
commit
9ef07c8ca4
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@ -1,3 +1,17 @@
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2011-03-24 Tom Tromey <tromey@redhat.com>
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PR breakpoints/11816:
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* linespec.c (decode_line_1): Parse `function:label' linespecs.
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(decode_compound): Update.
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(find_function_symbol): New function.
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(decode_dollar): Update.
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(decode_label): Add 'function_symbol' parameter. Handle
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function-relative labels.
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(decode_variable): Update.
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(symbol_found): Add 'function_symbol' parameter. Use label's PC,
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not its line. Set `special_display' and canonical name for
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labels.
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2011-03-24 Tom Tromey <tromey@redhat.com>
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* linespec.h (struct linespec_result) <special_display>: New
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@ -1,3 +1,8 @@
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2011-03-24 Tom Tromey <tromey@redhat.com>
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* gdb.texinfo (Specify Location): Document `function:label'
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linespec.
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2011-03-18 Phil Muldoon <pmuldoon@redhat.com>
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PR python/12149
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@ -6361,6 +6361,9 @@ Specifies the line @var{linenum} in the source file @var{filename}.
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Specifies the line that begins the body of the function @var{function}.
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For example, in C, this is the line with the open brace.
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@item @var{function}:@var{label}
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Specifies the line where @var{label} appears in @var{function}.
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@item @var{filename}:@var{function}
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Specifies the line that begins the body of the function @var{function}
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in the file @var{filename}. You only need the file name with a
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138
gdb/linespec.c
138
gdb/linespec.c
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@ -111,6 +111,9 @@ static struct symtab *symtab_from_filename (char **argptr,
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char *p, int is_quote_enclosed,
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int *not_found_ptr);
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static struct symbol *find_function_symbol (char **argptr, char *p,
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int is_quote_enclosed);
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static struct
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symtabs_and_lines decode_all_digits (char **argptr,
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struct symtab *default_symtab,
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@ -125,7 +128,8 @@ static struct symtabs_and_lines decode_dollar (char *copy,
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struct linespec_result *canonical,
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struct symtab *file_symtab);
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static int decode_label (char *copy, struct linespec_result *canonical,
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static int decode_label (struct symbol *function_symbol,
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char *copy, struct linespec_result *canonical,
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struct symtabs_and_lines *result);
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static struct symtabs_and_lines decode_variable (char *copy,
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@ -139,7 +143,8 @@ symtabs_and_lines symbol_found (int funfirstline,
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struct linespec_result *canonical,
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char *copy,
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struct symbol *sym,
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struct symtab *file_symtab);
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struct symtab *file_symtab,
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struct symbol *function_symbol);
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static struct
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symtabs_and_lines minsym_found (int funfirstline,
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@ -813,6 +818,13 @@ decode_line_1 (char **argptr, int funfirstline, struct symtab *default_symtab,
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/* The "first half" of the linespec. */
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char *first_half;
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/* If we are parsing `function:label', this holds the symbol for the
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function. */
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struct symbol *function_symbol = NULL;
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/* If FUNCTION_SYMBOL is not NULL, then this is the exception that
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was thrown when trying to parse a filename. */
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volatile struct gdb_exception file_exception;
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if (not_found_ptr)
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*not_found_ptr = 0;
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@ -885,8 +897,22 @@ decode_line_1 (char **argptr, int funfirstline, struct symtab *default_symtab,
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/* No, the first part is a filename; set file_symtab to be that file's
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symtab. Also, move argptr past the filename. */
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file_symtab = symtab_from_filename (argptr, p, is_quote_enclosed,
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not_found_ptr);
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TRY_CATCH (file_exception, RETURN_MASK_ERROR)
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{
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file_symtab = symtab_from_filename (argptr, p, is_quote_enclosed,
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not_found_ptr);
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}
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/* If that failed, maybe we have `function:label'. */
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if (file_exception.reason < 0)
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{
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function_symbol = find_function_symbol (argptr, p, is_quote_enclosed);
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/* If we did not find a function, re-throw the original
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exception. */
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if (!function_symbol)
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throw_exception (file_exception);
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if (not_found_ptr)
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*not_found_ptr = 0;
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}
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/* Check for single quotes on the non-filename part. */
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if (!is_quoted)
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@ -900,6 +926,8 @@ decode_line_1 (char **argptr, int funfirstline, struct symtab *default_symtab,
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}
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/* file_symtab is specified file's symtab, or 0 if no file specified.
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If we are parsing `function:symbol', then FUNCTION_SYMBOL is the
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function before the `:'.
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arg no longer contains the file name. */
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/* If the filename was quoted, we must re-check the quotation. */
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@ -921,7 +949,8 @@ decode_line_1 (char **argptr, int funfirstline, struct symtab *default_symtab,
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while (*q >= '0' && *q <= '9')
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q++;
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if (q != *argptr && (*q == 0 || *q == ' ' || *q == '\t' || *q == ','))
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if (q != *argptr && (*q == 0 || *q == ' ' || *q == '\t' || *q == ',')
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&& function_symbol == NULL)
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/* We found a token consisting of all digits -- at least one digit. */
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return decode_all_digits (argptr, default_symtab, default_line,
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canonical, file_symtab, q);
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@ -972,7 +1001,7 @@ decode_line_1 (char **argptr, int funfirstline, struct symtab *default_symtab,
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(e.g. HP-UX millicode routines such as $$dyncall), or it may
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be history value, or it may be a convenience variable. */
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if (*copy == '$')
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if (*copy == '$' && function_symbol == NULL)
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return decode_dollar (copy, funfirstline, default_symtab,
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canonical, file_symtab);
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@ -982,10 +1011,17 @@ decode_line_1 (char **argptr, int funfirstline, struct symtab *default_symtab,
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if (!file_symtab)
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{
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struct symtabs_and_lines label_result;
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if (decode_label (copy, canonical, &label_result))
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if (decode_label (function_symbol, copy, canonical, &label_result))
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return label_result;
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}
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if (function_symbol)
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{
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if (not_found_ptr)
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*not_found_ptr = 1;
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throw_exception (file_exception);
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}
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/* Look up that token as a variable.
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If file specified, use that file's per-file block to start with. */
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@ -1573,7 +1609,7 @@ decode_compound (char **argptr, int funfirstline,
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/* Look up entire name. */
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sym = lookup_symbol (copy, get_selected_block (0), VAR_DOMAIN, 0);
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if (sym)
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return symbol_found (funfirstline, canonical, copy, sym, NULL);
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return symbol_found (funfirstline, canonical, copy, sym, NULL, NULL);
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else
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{
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struct minimal_symbol *msym;
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@ -1811,6 +1847,44 @@ symtab_from_filename (char **argptr, char *p, int is_quote_enclosed,
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return file_symtab;
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}
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/* Look up a function symbol in *ARGPTR. If found, advance *ARGPTR
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and return the symbol. If not found, return NULL. */
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static struct symbol *
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find_function_symbol (char **argptr, char *p, int is_quote_enclosed)
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{
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char *p1;
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char *copy;
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struct symbol *function_symbol;
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p1 = p;
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while (p != *argptr && p[-1] == ' ')
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--p;
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if ((*p == '"') && is_quote_enclosed)
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--p;
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copy = (char *) alloca (p - *argptr + 1);
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memcpy (copy, *argptr, p - *argptr);
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/* It may have the ending quote right after the file name. */
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if ((is_quote_enclosed && copy[p - *argptr - 1] == '"')
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|| copy[p - *argptr - 1] == '\'')
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copy[p - *argptr - 1] = 0;
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else
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copy[p - *argptr] = 0;
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function_symbol = lookup_symbol (copy, get_selected_block (0),
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VAR_DOMAIN, 0);
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if (!function_symbol || SYMBOL_CLASS (function_symbol) != LOC_BLOCK)
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return NULL;
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/* Discard the file name from the arg. */
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p = p1 + 1;
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while (*p == ' ' || *p == '\t')
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p++;
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*argptr = p;
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return function_symbol;
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}
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/* This decodes a line where the argument is all digits (possibly
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@ -1945,7 +2019,7 @@ decode_dollar (char *copy, int funfirstline, struct symtab *default_symtab,
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need_canonical = 1;
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/* Symbol was found --> jump to normal symbol processing. */
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if (sym)
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return symbol_found (funfirstline, canonical, copy, sym, NULL);
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return symbol_found (funfirstline, canonical, copy, sym, NULL, NULL);
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/* If symbol was not found, look in minimal symbol tables. */
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msymbol = lookup_minimal_symbol (copy, NULL, NULL);
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@ -1981,6 +2055,8 @@ decode_dollar (char *copy, int funfirstline, struct symtab *default_symtab,
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/* A helper for decode_line_1 that tries to find a label. The label
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is searched for in the current block.
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FUNCTION_SYMBOL is the enclosing function; or NULL if none
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specified.
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COPY is the name of the label to find.
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CANONICAL is the same as the "canonical" argument to decode_line_1.
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RESULT is a pointer to a symtabs_and_lines structure which will be
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@ -1988,15 +2064,31 @@ decode_dollar (char *copy, int funfirstline, struct symtab *default_symtab,
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This function returns 1 if a label was found, 0 otherwise. */
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static int
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decode_label (char *copy, struct linespec_result *canonical,
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decode_label (struct symbol *function_symbol, char *copy,
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struct linespec_result *canonical,
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struct symtabs_and_lines *result)
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{
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struct symbol *sym;
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struct block *block;
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sym = lookup_symbol (copy, get_selected_block (0), LABEL_DOMAIN, 0);
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if (function_symbol)
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block = SYMBOL_BLOCK_VALUE (function_symbol);
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else
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{
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block = get_selected_block (0);
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for (;
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block && !BLOCK_FUNCTION (block);
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block = BLOCK_SUPERBLOCK (block))
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;
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if (!block)
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return 0;
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function_symbol = BLOCK_FUNCTION (block);
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}
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sym = lookup_symbol (copy, block, LABEL_DOMAIN, 0);
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if (sym != NULL)
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*result = symbol_found (0, canonical, copy, sym, NULL);
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*result = symbol_found (0, canonical, copy, sym, NULL, function_symbol);
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return sym != NULL;
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}
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@ -2022,7 +2114,7 @@ decode_variable (char *copy, int funfirstline,
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VAR_DOMAIN, 0);
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if (sym != NULL)
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return symbol_found (funfirstline, canonical, copy, sym, file_symtab);
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return symbol_found (funfirstline, canonical, copy, sym, file_symtab, NULL);
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msymbol = lookup_minimal_symbol (copy, NULL, NULL);
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@ -2051,7 +2143,8 @@ decode_variable (char *copy, int funfirstline,
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static struct symtabs_and_lines
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symbol_found (int funfirstline, struct linespec_result *canonical, char *copy,
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struct symbol *sym, struct symtab *file_symtab)
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struct symbol *sym, struct symtab *file_symtab,
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struct symbol *function_symbol)
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{
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struct symtabs_and_lines values;
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@ -2083,16 +2176,29 @@ symbol_found (int funfirstline, struct linespec_result *canonical, char *copy,
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{
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if (funfirstline && SYMBOL_CLASS (sym) != LOC_LABEL)
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error (_("\"%s\" is not a function"), copy);
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else if (SYMBOL_LINE (sym) != 0)
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else if (SYMBOL_VALUE_ADDRESS (sym) != 0)
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{
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/* We know its line number. */
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values.sals = (struct symtab_and_line *)
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xmalloc (sizeof (struct symtab_and_line));
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values.nelts = 1;
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memset (&values.sals[0], 0, sizeof (values.sals[0]));
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init_sal (&values.sals[0]);
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values.sals[0].symtab = SYMBOL_SYMTAB (sym);
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values.sals[0].line = SYMBOL_LINE (sym);
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values.sals[0].pc = SYMBOL_VALUE_ADDRESS (sym);
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values.sals[0].pspace = SYMTAB_PSPACE (SYMBOL_SYMTAB (sym));
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values.sals[0].explicit_pc = 1;
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if (canonical)
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{
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canonical->special_display = 1;
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canonical->canonical = xmalloc (sizeof (char *));
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canonical->canonical[0]
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= xstrprintf ("%s:%s",
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SYMBOL_NATURAL_NAME (function_symbol),
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SYMBOL_NATURAL_NAME (sym));
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}
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return values;
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}
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else
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@ -1,3 +1,8 @@
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2011-03-24 Tom Tromey <tromey@redhat.com>
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* gdb.base/label.exp: Use `main:there' linespec. Add re-running
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test.
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2011-03-22 Jan Kratochvil <jan.kratochvil@redhat.com>
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* gdb.dwarf2/dw2-entry-value-main.c: New file.
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@ -46,7 +46,7 @@ gdb_test "break here" \
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"Breakpoint.*at.*" \
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"breakpoint here"
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gdb_test "break there" \
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gdb_test "break main:there" \
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"Breakpoint.*at.*" \
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"breakpoint there"
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@ -57,3 +57,9 @@ gdb_test "cont" \
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gdb_test "cont" \
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"Breakpoint 2,.*" \
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"continue to 'here'"
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rerun_to_main
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gdb_test "cont" \
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"Breakpoint 3,.*" \
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"continue to 'there' after re-run"
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