744 lines
20 KiB
C
744 lines
20 KiB
C
/* Skipping uninteresting files and functions while stepping.
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Copyright (C) 2011-2017 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "skip.h"
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#include "value.h"
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#include "valprint.h"
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#include "ui-out.h"
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#include "symtab.h"
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#include "gdbcmd.h"
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#include "command.h"
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#include "completer.h"
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#include "stack.h"
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#include "cli/cli-utils.h"
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#include "arch-utils.h"
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#include "linespec.h"
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#include "objfiles.h"
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#include "breakpoint.h" /* for get_sal_arch () */
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#include "source.h"
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#include "filenames.h"
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#include "fnmatch.h"
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#include "gdb_regex.h"
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struct skiplist_entry
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{
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int number;
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/* Non-zero if FILE is a glob-style pattern.
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Otherewise it is the plain file name (possibly with directories). */
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int file_is_glob;
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/* The name of the file or NULL.
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The skiplist entry owns this pointer. */
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char *file;
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/* Non-zero if FUNCTION is a regexp.
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Otherwise it is a plain function name (possibly with arguments,
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for C++). */
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int function_is_regexp;
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/* The name of the function or NULL.
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The skiplist entry owns this pointer. */
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char *function;
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/* If this is a function regexp, the compiled form. */
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regex_t compiled_function_regexp;
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/* Non-zero if the function regexp has been compiled. */
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int compiled_function_regexp_is_valid;
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int enabled;
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struct skiplist_entry *next;
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};
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static void add_skiplist_entry (struct skiplist_entry *e);
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static struct skiplist_entry *skiplist_entry_chain;
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static int skiplist_entry_count;
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#define ALL_SKIPLIST_ENTRIES(E) \
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for (E = skiplist_entry_chain; E; E = E->next)
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#define ALL_SKIPLIST_ENTRIES_SAFE(E,TMP) \
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for (E = skiplist_entry_chain; \
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E ? (TMP = E->next, 1) : 0; \
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E = TMP)
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/* Create a skip object. */
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static struct skiplist_entry *
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make_skip_entry (int file_is_glob, const char *file,
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int function_is_regexp, const char *function)
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{
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struct skiplist_entry *e = XCNEW (struct skiplist_entry);
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gdb_assert (file != NULL || function != NULL);
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if (file_is_glob)
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gdb_assert (file != NULL);
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if (function_is_regexp)
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gdb_assert (function != NULL);
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if (file != NULL)
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e->file = xstrdup (file);
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if (function != NULL)
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e->function = xstrdup (function);
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e->file_is_glob = file_is_glob;
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e->function_is_regexp = function_is_regexp;
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e->enabled = 1;
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return e;
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}
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/* Free a skiplist entry. */
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static void
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free_skiplist_entry (struct skiplist_entry *e)
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{
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xfree (e->file);
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xfree (e->function);
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if (e->function_is_regexp && e->compiled_function_regexp_is_valid)
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regfree (&e->compiled_function_regexp);
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xfree (e);
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}
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/* Wrapper to free_skiplist_entry for use as a cleanup. */
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static void
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free_skiplist_entry_cleanup (void *e)
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{
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free_skiplist_entry ((struct skiplist_entry *) e);
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}
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/* Create a cleanup to free skiplist entry E. */
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static struct cleanup *
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make_free_skiplist_entry_cleanup (struct skiplist_entry *e)
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{
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return make_cleanup (free_skiplist_entry_cleanup, e);
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}
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static void
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skip_file_command (char *arg, int from_tty)
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{
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struct symtab *symtab;
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const char *filename = NULL;
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/* If no argument was given, try to default to the last
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displayed codepoint. */
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if (arg == NULL)
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{
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symtab = get_last_displayed_symtab ();
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if (symtab == NULL)
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error (_("No default file now."));
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/* It is not a typo, symtab_to_filename_for_display woule be needlessly
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ambiguous. */
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filename = symtab_to_fullname (symtab);
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}
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else
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filename = arg;
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add_skiplist_entry (make_skip_entry (0, filename, 0, NULL));
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printf_filtered (_("File %s will be skipped when stepping.\n"), filename);
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}
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/* Create a skiplist entry for the given function NAME and add it to the
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list. */
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static void
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skip_function (const char *name)
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{
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add_skiplist_entry (make_skip_entry (0, NULL, 0, name));
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printf_filtered (_("Function %s will be skipped when stepping.\n"), name);
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}
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static void
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skip_function_command (char *arg, int from_tty)
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{
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/* Default to the current function if no argument is given. */
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if (arg == NULL)
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{
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const char *name = NULL;
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CORE_ADDR pc;
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if (!last_displayed_sal_is_valid ())
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error (_("No default function now."));
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pc = get_last_displayed_addr ();
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if (!find_pc_partial_function (pc, &name, NULL, NULL))
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{
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error (_("No function found containing current program point %s."),
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paddress (get_current_arch (), pc));
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}
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skip_function (name);
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return;
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}
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skip_function (arg);
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}
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/* Compile the regexp in E.
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An error is thrown if there's an error.
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MESSAGE is used as a prefix of the error message. */
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static void
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compile_skip_regexp (struct skiplist_entry *e, const char *message)
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{
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int code;
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int flags = REG_NOSUB;
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#ifdef REG_EXTENDED
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flags |= REG_EXTENDED;
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#endif
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gdb_assert (e->function_is_regexp && e->function != NULL);
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code = regcomp (&e->compiled_function_regexp, e->function, flags);
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if (code != 0)
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{
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char *err = get_regcomp_error (code, &e->compiled_function_regexp);
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make_cleanup (xfree, err);
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error (_("%s: %s"), message, err);
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}
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e->compiled_function_regexp_is_valid = 1;
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}
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/* Process "skip ..." that does not match "skip file" or "skip function". */
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static void
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skip_command (char *arg, int from_tty)
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{
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const char *file = NULL;
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const char *gfile = NULL;
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const char *function = NULL;
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const char *rfunction = NULL;
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char **argv;
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struct cleanup *cleanups;
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struct skiplist_entry *e;
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int i;
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if (arg == NULL)
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{
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skip_function_command (arg, from_tty);
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return;
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}
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argv = buildargv (arg);
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cleanups = make_cleanup_freeargv (argv);
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for (i = 0; argv[i] != NULL; ++i)
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{
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const char *p = argv[i];
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const char *value = argv[i + 1];
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if (strcmp (p, "-fi") == 0
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|| strcmp (p, "-file") == 0)
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{
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if (value == NULL)
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error (_("Missing value for %s option."), p);
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file = value;
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++i;
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}
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else if (strcmp (p, "-gfi") == 0
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|| strcmp (p, "-gfile") == 0)
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{
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if (value == NULL)
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error (_("Missing value for %s option."), p);
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gfile = value;
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++i;
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}
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else if (strcmp (p, "-fu") == 0
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|| strcmp (p, "-function") == 0)
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{
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if (value == NULL)
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error (_("Missing value for %s option."), p);
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function = value;
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++i;
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}
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else if (strcmp (p, "-rfu") == 0
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|| strcmp (p, "-rfunction") == 0)
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{
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if (value == NULL)
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error (_("Missing value for %s option."), p);
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rfunction = value;
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++i;
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}
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else if (*p == '-')
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error (_("Invalid skip option: %s"), p);
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else if (i == 0)
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{
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/* Assume the user entered "skip FUNCTION-NAME".
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FUNCTION-NAME may be `foo (int)', and therefore we pass the
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complete original arg to skip_function command as if the user
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typed "skip function arg". */
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do_cleanups (cleanups);
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skip_function_command (arg, from_tty);
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return;
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}
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else
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error (_("Invalid argument: %s"), p);
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}
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if (file != NULL && gfile != NULL)
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error (_("Cannot specify both -file and -gfile."));
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if (function != NULL && rfunction != NULL)
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error (_("Cannot specify both -function and -rfunction."));
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/* This shouldn't happen as "skip" by itself gets punted to
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skip_function_command. */
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gdb_assert (file != NULL || gfile != NULL
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|| function != NULL || rfunction != NULL);
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e = make_skip_entry (gfile != NULL, file ? file : gfile,
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rfunction != NULL, function ? function : rfunction);
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if (rfunction != NULL)
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{
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struct cleanup *rf_cleanups = make_free_skiplist_entry_cleanup (e);
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compile_skip_regexp (e, _("regexp"));
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discard_cleanups (rf_cleanups);
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}
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add_skiplist_entry (e);
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/* I18N concerns drive some of the choices here (we can't piece together
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the output too much). OTOH we want to keep this simple. Therefore the
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only polish we add to the output is to append "(s)" to "File" or
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"Function" if they're a glob/regexp. */
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{
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const char *file_to_print = file != NULL ? file : gfile;
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const char *function_to_print = function != NULL ? function : rfunction;
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const char *file_text = gfile != NULL ? _("File(s)") : _("File");
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const char *lower_file_text = gfile != NULL ? _("file(s)") : _("file");
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const char *function_text
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= rfunction != NULL ? _("Function(s)") : _("Function");
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if (function_to_print == NULL)
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{
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printf_filtered (_("%s %s will be skipped when stepping.\n"),
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file_text, file_to_print);
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}
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else if (file_to_print == NULL)
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{
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printf_filtered (_("%s %s will be skipped when stepping.\n"),
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function_text, function_to_print);
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}
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else
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{
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printf_filtered (_("%s %s in %s %s will be skipped"
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" when stepping.\n"),
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function_text, function_to_print,
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lower_file_text, file_to_print);
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}
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}
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do_cleanups (cleanups);
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}
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static void
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skip_info (char *arg, int from_tty)
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{
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struct skiplist_entry *e;
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int num_printable_entries = 0;
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struct value_print_options opts;
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struct cleanup *tbl_chain;
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get_user_print_options (&opts);
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/* Count the number of rows in the table and see if we need space for a
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64-bit address anywhere. */
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ALL_SKIPLIST_ENTRIES (e)
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if (arg == NULL || number_is_in_list (arg, e->number))
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num_printable_entries++;
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if (num_printable_entries == 0)
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{
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if (arg == NULL)
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current_uiout->message (_("Not skipping any files or functions.\n"));
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else
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current_uiout->message (
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_("No skiplist entries found with number %s.\n"), arg);
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return;
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}
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tbl_chain = make_cleanup_ui_out_table_begin_end (current_uiout, 6,
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num_printable_entries,
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"SkiplistTable");
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current_uiout->table_header (5, ui_left, "number", "Num"); /* 1 */
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current_uiout->table_header (3, ui_left, "enabled", "Enb"); /* 2 */
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current_uiout->table_header (4, ui_right, "regexp", "Glob"); /* 3 */
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current_uiout->table_header (20, ui_left, "file", "File"); /* 4 */
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current_uiout->table_header (2, ui_right, "regexp", "RE"); /* 5 */
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current_uiout->table_header (40, ui_noalign, "function", "Function"); /* 6 */
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current_uiout->table_body ();
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ALL_SKIPLIST_ENTRIES (e)
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{
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struct cleanup *entry_chain;
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QUIT;
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if (arg != NULL && !number_is_in_list (arg, e->number))
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continue;
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entry_chain = make_cleanup_ui_out_tuple_begin_end (current_uiout,
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"blklst-entry");
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current_uiout->field_int ("number", e->number); /* 1 */
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if (e->enabled)
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current_uiout->field_string ("enabled", "y"); /* 2 */
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else
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current_uiout->field_string ("enabled", "n"); /* 2 */
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if (e->file_is_glob)
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current_uiout->field_string ("regexp", "y"); /* 3 */
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else
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current_uiout->field_string ("regexp", "n"); /* 3 */
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current_uiout->field_string ("file",
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e->file ? e->file : "<none>"); /* 4 */
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if (e->function_is_regexp)
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current_uiout->field_string ("regexp", "y"); /* 5 */
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else
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current_uiout->field_string ("regexp", "n"); /* 5 */
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current_uiout->field_string (
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"function", e->function ? e->function : "<none>"); /* 6 */
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current_uiout->text ("\n");
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do_cleanups (entry_chain);
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}
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do_cleanups (tbl_chain);
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}
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static void
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skip_enable_command (char *arg, int from_tty)
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{
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struct skiplist_entry *e;
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int found = 0;
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ALL_SKIPLIST_ENTRIES (e)
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if (arg == NULL || number_is_in_list (arg, e->number))
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{
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e->enabled = 1;
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found = 1;
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}
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if (!found)
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error (_("No skiplist entries found with number %s."), arg);
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}
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static void
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skip_disable_command (char *arg, int from_tty)
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{
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struct skiplist_entry *e;
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int found = 0;
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ALL_SKIPLIST_ENTRIES (e)
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if (arg == NULL || number_is_in_list (arg, e->number))
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{
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e->enabled = 0;
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found = 1;
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}
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if (!found)
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error (_("No skiplist entries found with number %s."), arg);
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}
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static void
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skip_delete_command (char *arg, int from_tty)
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{
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struct skiplist_entry *e, *temp, *b_prev;
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int found = 0;
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b_prev = 0;
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ALL_SKIPLIST_ENTRIES_SAFE (e, temp)
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if (arg == NULL || number_is_in_list (arg, e->number))
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{
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if (b_prev != NULL)
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b_prev->next = e->next;
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else
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skiplist_entry_chain = e->next;
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free_skiplist_entry (e);
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found = 1;
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}
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else
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{
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b_prev = e;
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}
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if (!found)
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error (_("No skiplist entries found with number %s."), arg);
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}
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/* Add the given skiplist entry to our list, and set the entry's number. */
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static void
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add_skiplist_entry (struct skiplist_entry *e)
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{
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struct skiplist_entry *e1;
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e->number = ++skiplist_entry_count;
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/* Add to the end of the chain so that the list of
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skiplist entries will be in numerical order. */
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e1 = skiplist_entry_chain;
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if (e1 == NULL)
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skiplist_entry_chain = e;
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else
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{
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while (e1->next)
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e1 = e1->next;
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e1->next = e;
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}
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}
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/* Return non-zero if we're stopped at a file to be skipped. */
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static int
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skip_file_p (struct skiplist_entry *e,
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const struct symtab_and_line *function_sal)
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{
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gdb_assert (e->file != NULL && !e->file_is_glob);
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if (function_sal->symtab == NULL)
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return 0;
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/* Check first sole SYMTAB->FILENAME. It may not be a substring of
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symtab_to_fullname as it may contain "./" etc. */
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if (compare_filenames_for_search (function_sal->symtab->filename, e->file))
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return 1;
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/* Before we invoke realpath, which can get expensive when many
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files are involved, do a quick comparison of the basenames. */
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if (!basenames_may_differ
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&& filename_cmp (lbasename (function_sal->symtab->filename),
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lbasename (e->file)) != 0)
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return 0;
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/* Note: symtab_to_fullname caches its result, thus we don't have to. */
|
|
{
|
|
const char *fullname = symtab_to_fullname (function_sal->symtab);
|
|
|
|
if (compare_filenames_for_search (fullname, e->file))
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Return non-zero if we're stopped at a globbed file to be skipped. */
|
|
|
|
static int
|
|
skip_gfile_p (struct skiplist_entry *e,
|
|
const struct symtab_and_line *function_sal)
|
|
{
|
|
gdb_assert (e->file != NULL && e->file_is_glob);
|
|
|
|
if (function_sal->symtab == NULL)
|
|
return 0;
|
|
|
|
/* Check first sole SYMTAB->FILENAME. It may not be a substring of
|
|
symtab_to_fullname as it may contain "./" etc. */
|
|
if (gdb_filename_fnmatch (e->file, function_sal->symtab->filename,
|
|
FNM_FILE_NAME | FNM_NOESCAPE) == 0)
|
|
return 1;
|
|
|
|
/* Before we invoke symtab_to_fullname, which is expensive, do a quick
|
|
comparison of the basenames.
|
|
Note that we assume that lbasename works with glob-style patterns.
|
|
If the basename of the glob pattern is something like "*.c" then this
|
|
isn't much of a win. Oh well. */
|
|
if (!basenames_may_differ
|
|
&& gdb_filename_fnmatch (lbasename (e->file),
|
|
lbasename (function_sal->symtab->filename),
|
|
FNM_FILE_NAME | FNM_NOESCAPE) != 0)
|
|
return 0;
|
|
|
|
/* Note: symtab_to_fullname caches its result, thus we don't have to. */
|
|
{
|
|
const char *fullname = symtab_to_fullname (function_sal->symtab);
|
|
|
|
if (compare_glob_filenames_for_search (fullname, e->file))
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Return non-zero if we're stopped at a function to be skipped. */
|
|
|
|
static int
|
|
skip_function_p (struct skiplist_entry *e, const char *function_name)
|
|
{
|
|
gdb_assert (e->function != NULL && !e->function_is_regexp);
|
|
return strcmp_iw (function_name, e->function) == 0;
|
|
}
|
|
|
|
/* Return non-zero if we're stopped at a function regexp to be skipped. */
|
|
|
|
static int
|
|
skip_rfunction_p (struct skiplist_entry *e, const char *function_name)
|
|
{
|
|
gdb_assert (e->function != NULL && e->function_is_regexp
|
|
&& e->compiled_function_regexp_is_valid);
|
|
return (regexec (&e->compiled_function_regexp, function_name, 0, NULL, 0)
|
|
== 0);
|
|
}
|
|
|
|
/* See skip.h. */
|
|
|
|
int
|
|
function_name_is_marked_for_skip (const char *function_name,
|
|
const struct symtab_and_line *function_sal)
|
|
{
|
|
struct skiplist_entry *e;
|
|
|
|
if (function_name == NULL)
|
|
return 0;
|
|
|
|
ALL_SKIPLIST_ENTRIES (e)
|
|
{
|
|
int skip_by_file = 0;
|
|
int skip_by_function = 0;
|
|
|
|
if (!e->enabled)
|
|
continue;
|
|
|
|
if (e->file != NULL)
|
|
{
|
|
if (e->file_is_glob)
|
|
{
|
|
if (skip_gfile_p (e, function_sal))
|
|
skip_by_file = 1;
|
|
}
|
|
else
|
|
{
|
|
if (skip_file_p (e, function_sal))
|
|
skip_by_file = 1;
|
|
}
|
|
}
|
|
if (e->function != NULL)
|
|
{
|
|
if (e->function_is_regexp)
|
|
{
|
|
if (skip_rfunction_p (e, function_name))
|
|
skip_by_function = 1;
|
|
}
|
|
else
|
|
{
|
|
if (skip_function_p (e, function_name))
|
|
skip_by_function = 1;
|
|
}
|
|
}
|
|
|
|
/* If both file and function must match, make sure we don't errantly
|
|
exit if only one of them match. */
|
|
if (e->file != NULL && e->function != NULL)
|
|
{
|
|
if (skip_by_file && skip_by_function)
|
|
return 1;
|
|
}
|
|
/* Only one of file/function is specified. */
|
|
else if (skip_by_file || skip_by_function)
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Provide a prototype to silence -Wmissing-prototypes. */
|
|
extern initialize_file_ftype _initialize_step_skip;
|
|
|
|
void
|
|
_initialize_step_skip (void)
|
|
{
|
|
static struct cmd_list_element *skiplist = NULL;
|
|
struct cmd_list_element *c;
|
|
|
|
skiplist_entry_chain = 0;
|
|
skiplist_entry_count = 0;
|
|
|
|
add_prefix_cmd ("skip", class_breakpoint, skip_command, _("\
|
|
Ignore a function while stepping.\n\
|
|
\n\
|
|
Usage: skip [FUNCTION-NAME]\n\
|
|
skip [<file-spec>] [<function-spec>]\n\
|
|
If no arguments are given, ignore the current function.\n\
|
|
\n\
|
|
<file-spec> is one of:\n\
|
|
-fi|-file FILE-NAME\n\
|
|
-gfi|-gfile GLOB-FILE-PATTERN\n\
|
|
<function-spec> is one of:\n\
|
|
-fu|-function FUNCTION-NAME\n\
|
|
-rfu|-rfunction FUNCTION-NAME-REGULAR-EXPRESSION"),
|
|
&skiplist, "skip ", 1, &cmdlist);
|
|
|
|
c = add_cmd ("file", class_breakpoint, skip_file_command, _("\
|
|
Ignore a file while stepping.\n\
|
|
Usage: skip file [FILE-NAME]\n\
|
|
If no filename is given, ignore the current file."),
|
|
&skiplist);
|
|
set_cmd_completer (c, filename_completer);
|
|
|
|
c = add_cmd ("function", class_breakpoint, skip_function_command, _("\
|
|
Ignore a function while stepping.\n\
|
|
Usage: skip function [FUNCTION-NAME]\n\
|
|
If no function name is given, skip the current function."),
|
|
&skiplist);
|
|
set_cmd_completer (c, location_completer);
|
|
|
|
add_cmd ("enable", class_breakpoint, skip_enable_command, _("\
|
|
Enable skip entries. You can specify numbers (e.g. \"skip enable 1 3\"), \
|
|
ranges (e.g. \"skip enable 4-8\"), or both (e.g. \"skip enable 1 3 4-8\").\n\n\
|
|
If you don't specify any numbers or ranges, we'll enable all skip entries.\n\n\
|
|
Usage: skip enable [NUMBERS AND/OR RANGES]"),
|
|
&skiplist);
|
|
|
|
add_cmd ("disable", class_breakpoint, skip_disable_command, _("\
|
|
Disable skip entries. You can specify numbers (e.g. \"skip disable 1 3\"), \
|
|
ranges (e.g. \"skip disable 4-8\"), or both (e.g. \"skip disable 1 3 4-8\").\n\n\
|
|
If you don't specify any numbers or ranges, we'll disable all skip entries.\n\n\
|
|
Usage: skip disable [NUMBERS AND/OR RANGES]"),
|
|
&skiplist);
|
|
|
|
add_cmd ("delete", class_breakpoint, skip_delete_command, _("\
|
|
Delete skip entries. You can specify numbers (e.g. \"skip delete 1 3\"), \
|
|
ranges (e.g. \"skip delete 4-8\"), or both (e.g. \"skip delete 1 3 4-8\").\n\n\
|
|
If you don't specify any numbers or ranges, we'll delete all skip entries.\n\n\
|
|
Usage: skip delete [NUMBERS AND/OR RANGES]"),
|
|
&skiplist);
|
|
|
|
add_info ("skip", skip_info, _("\
|
|
Display the status of skips. You can specify numbers (e.g. \"skip info 1 3\"), \
|
|
ranges (e.g. \"skip info 4-8\"), or both (e.g. \"skip info 1 3 4-8\").\n\n\
|
|
If you don't specify any numbers or ranges, we'll show all skips.\n\n\
|
|
Usage: skip info [NUMBERS AND/OR RANGES]\n\
|
|
The \"Type\" column indicates one of:\n\
|
|
\tfile - ignored file\n\
|
|
\tfunction - ignored function"));
|
|
}
|