740 lines
21 KiB
C
740 lines
21 KiB
C
/* Skipping uninteresting files and functions while stepping.
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Copyright (C) 2011-2018 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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#include "common/gdb_optional.h"
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#include <list>
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/* True if we want to print debug printouts related to file/function
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skipping. */
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static int debug_skip = 0;
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class skiplist_entry
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{
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public:
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/* Create a skiplist_entry object and add it to the chain. */
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static void add_entry (bool file_is_glob,
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std::string &&file,
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bool function_is_regexp,
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std::string &&function);
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/* Return true if the skip entry has a file or glob-style file
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pattern that matches FUNCTION_SAL. */
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bool skip_file_p (const symtab_and_line &function_sal) const;
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/* Return true if the skip entry has a function or function regexp
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that matches FUNCTION_NAME. */
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bool skip_function_p (const char *function_name) const;
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/* Getters. */
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int number () const { return m_number; };
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bool enabled () const { return m_enabled; };
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bool file_is_glob () const { return m_file_is_glob; }
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const std::string &file () const { return m_file; }
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const std::string &function () const { return m_function; }
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bool function_is_regexp () const { return m_function_is_regexp; }
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/* Setters. */
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void enable () { m_enabled = true; };
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void disable () { m_enabled = false; };
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/* Disable copy. */
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skiplist_entry (const skiplist_entry &) = delete;
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void operator= (const skiplist_entry &) = delete;
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private:
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/* Key that grants access to the constructor. */
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struct private_key {};
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public:
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/* Public so we can construct with container::emplace_back. Since
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it requires a private class key, it can't be called from outside.
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Use the add_entry static factory method to construct instead. */
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skiplist_entry (bool file_is_glob, std::string &&file,
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bool function_is_regexp, std::string &&function,
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private_key);
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private:
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/* Return true if we're stopped at a file to be skipped. */
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bool do_skip_file_p (const symtab_and_line &function_sal) const;
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/* Return true if we're stopped at a globbed file to be skipped. */
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bool do_skip_gfile_p (const symtab_and_line &function_sal) const;
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private: /* data */
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int m_number = -1;
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/* True if FILE is a glob-style pattern.
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Otherwise it is the plain file name (possibly with directories). */
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bool m_file_is_glob;
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/* The name of the file or empty if no name. */
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std::string m_file;
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/* True 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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bool m_function_is_regexp;
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/* The name of the function or empty if no name. */
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std::string m_function;
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/* If this is a function regexp, the compiled form. */
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gdb::optional<compiled_regex> m_compiled_function_regexp;
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/* Enabled/disabled state. */
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bool m_enabled = true;
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};
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static std::list<skiplist_entry> skiplist_entries;
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static int highest_skiplist_entry_num = 0;
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skiplist_entry::skiplist_entry (bool file_is_glob,
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std::string &&file,
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bool function_is_regexp,
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std::string &&function,
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private_key)
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: m_file_is_glob (file_is_glob),
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m_file (std::move (file)),
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m_function_is_regexp (function_is_regexp),
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m_function (std::move (function))
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{
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gdb_assert (!m_file.empty () || !m_function.empty ());
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if (m_file_is_glob)
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gdb_assert (!m_file.empty ());
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if (m_function_is_regexp)
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{
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gdb_assert (!m_function.empty ());
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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 (!m_function.empty ());
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m_compiled_function_regexp.emplace (m_function.c_str (), flags,
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_("regexp"));
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}
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}
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void
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skiplist_entry::add_entry (bool file_is_glob, std::string &&file,
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bool function_is_regexp, std::string &&function)
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{
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skiplist_entries.emplace_back (file_is_glob,
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std::move (file),
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function_is_regexp,
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std::move (function),
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private_key {});
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/* Incremented after push_back, in case push_back throws. */
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skiplist_entries.back ().m_number = ++highest_skiplist_entry_num;
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}
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static void
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skip_file_command (const 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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skiplist_entry::add_entry (false, std::string (filename),
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false, std::string ());
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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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skiplist_entry::add_entry (false, std::string (), false, std::string (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 (const 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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/* Process "skip ..." that does not match "skip file" or "skip function". */
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static void
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skip_command (const 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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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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gdb_argv argv (arg);
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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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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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std::string entry_file;
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if (file != NULL)
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entry_file = file;
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else if (gfile != NULL)
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entry_file = gfile;
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std::string entry_function;
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if (function != NULL)
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entry_function = function;
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else if (rfunction != NULL)
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entry_function = rfunction;
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skiplist_entry::add_entry (gfile != NULL, std::move (entry_file),
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rfunction != NULL, std::move (entry_function));
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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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}
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static void
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info_skip_command (const char *arg, int from_tty)
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{
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int num_printable_entries = 0;
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struct value_print_options opts;
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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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for (const skiplist_entry &e : skiplist_entries)
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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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ui_out_emit_table table_emitter (current_uiout, 6, 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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for (const skiplist_entry &e : skiplist_entries)
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{
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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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ui_out_emit_tuple tuple_emitter (current_uiout, "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 ().empty () ? "<none>"
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: e.file ().c_str ()); /* 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 ("function",
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e.function ().empty () ? "<none>"
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: e.function ().c_str ()); /* 6 */
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current_uiout->text ("\n");
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}
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}
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static void
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skip_enable_command (const char *arg, int from_tty)
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{
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bool found = false;
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for (skiplist_entry &e : skiplist_entries)
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if (arg == NULL || number_is_in_list (arg, e.number ()))
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{
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e.enable ();
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found = true;
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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 (const char *arg, int from_tty)
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{
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bool found = false;
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for (skiplist_entry &e : skiplist_entries)
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if (arg == NULL || number_is_in_list (arg, e.number ()))
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{
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e.disable ();
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found = true;
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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 (const char *arg, int from_tty)
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{
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bool found = false;
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for (auto it = skiplist_entries.begin (),
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end = skiplist_entries.end ();
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it != end;)
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{
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const skiplist_entry &e = *it;
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if (arg == NULL || number_is_in_list (arg, e.number ()))
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{
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it = skiplist_entries.erase (it);
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found = true;
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}
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else
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++it;
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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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bool
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skiplist_entry::do_skip_file_p (const symtab_and_line &function_sal) const
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{
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if (debug_skip)
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fprintf_unfiltered (gdb_stdlog,
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"skip: checking if file %s matches non-glob %s...",
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function_sal.symtab->filename, m_file.c_str ());
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bool result;
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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,
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m_file.c_str ()))
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result = true;
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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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else if (!basenames_may_differ
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&& filename_cmp (lbasename (function_sal.symtab->filename),
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lbasename (m_file.c_str ())) != 0)
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result = false;
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else
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{
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/* Note: symtab_to_fullname caches its result, thus we don't have to. */
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const char *fullname = symtab_to_fullname (function_sal.symtab);
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result = compare_filenames_for_search (fullname, m_file.c_str ());
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}
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if (debug_skip)
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fprintf_unfiltered (gdb_stdlog, result ? "yes.\n" : "no.\n");
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return result;
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}
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bool
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skiplist_entry::do_skip_gfile_p (const symtab_and_line &function_sal) const
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{
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if (debug_skip)
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fprintf_unfiltered (gdb_stdlog,
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|
"skip: checking if file %s matches glob %s...",
|
|
function_sal.symtab->filename, m_file.c_str ());
|
|
|
|
bool result;
|
|
|
|
/* Check first sole SYMTAB->FILENAME. It may not be a substring of
|
|
symtab_to_fullname as it may contain "./" etc. */
|
|
if (gdb_filename_fnmatch (m_file.c_str (), function_sal.symtab->filename,
|
|
FNM_FILE_NAME | FNM_NOESCAPE) == 0)
|
|
result = true;
|
|
|
|
/* 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. */
|
|
else if (!basenames_may_differ
|
|
&& gdb_filename_fnmatch (lbasename (m_file.c_str ()),
|
|
lbasename (function_sal.symtab->filename),
|
|
FNM_FILE_NAME | FNM_NOESCAPE) != 0)
|
|
result = false;
|
|
else
|
|
{
|
|
/* Note: symtab_to_fullname caches its result, thus we don't have to. */
|
|
const char *fullname = symtab_to_fullname (function_sal.symtab);
|
|
|
|
result = compare_glob_filenames_for_search (fullname, m_file.c_str ());
|
|
}
|
|
|
|
if (debug_skip)
|
|
fprintf_unfiltered (gdb_stdlog, result ? "yes.\n" : "no.\n");
|
|
|
|
return result;
|
|
}
|
|
|
|
bool
|
|
skiplist_entry::skip_file_p (const symtab_and_line &function_sal) const
|
|
{
|
|
if (m_file.empty ())
|
|
return false;
|
|
|
|
if (function_sal.symtab == NULL)
|
|
return false;
|
|
|
|
if (m_file_is_glob)
|
|
return do_skip_gfile_p (function_sal);
|
|
else
|
|
return do_skip_file_p (function_sal);
|
|
}
|
|
|
|
bool
|
|
skiplist_entry::skip_function_p (const char *function_name) const
|
|
{
|
|
if (m_function.empty ())
|
|
return false;
|
|
|
|
bool result;
|
|
|
|
if (m_function_is_regexp)
|
|
{
|
|
if (debug_skip)
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"skip: checking if function %s matches regex %s...",
|
|
function_name, m_function.c_str ());
|
|
|
|
gdb_assert (m_compiled_function_regexp);
|
|
result
|
|
= (m_compiled_function_regexp->exec (function_name, 0, NULL, 0) == 0);
|
|
}
|
|
else
|
|
{
|
|
if (debug_skip)
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
("skip: checking if function %s matches non-regex "
|
|
"%s..."),
|
|
function_name, m_function.c_str ());
|
|
result = (strcmp_iw (function_name, m_function.c_str ()) == 0);
|
|
}
|
|
|
|
if (debug_skip)
|
|
fprintf_unfiltered (gdb_stdlog, result ? "yes.\n" : "no.\n");
|
|
|
|
return result;
|
|
}
|
|
|
|
/* See skip.h. */
|
|
|
|
bool
|
|
function_name_is_marked_for_skip (const char *function_name,
|
|
const symtab_and_line &function_sal)
|
|
{
|
|
if (function_name == NULL)
|
|
return false;
|
|
|
|
for (const skiplist_entry &e : skiplist_entries)
|
|
{
|
|
if (!e.enabled ())
|
|
continue;
|
|
|
|
bool skip_by_file = e.skip_file_p (function_sal);
|
|
bool skip_by_function = e.skip_function_p (function_name);
|
|
|
|
/* If both file and function must match, make sure we don't errantly
|
|
exit if only one of them match. */
|
|
if (!e.file ().empty () && !e.function ().empty ())
|
|
{
|
|
if (skip_by_file && skip_by_function)
|
|
return true;
|
|
}
|
|
/* Only one of file/function is specified. */
|
|
else if (skip_by_file || skip_by_function)
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/* Completer for skip numbers. */
|
|
|
|
static void
|
|
complete_skip_number (cmd_list_element *cmd,
|
|
completion_tracker &completer,
|
|
const char *text, const char *word)
|
|
{
|
|
size_t word_len = strlen (word);
|
|
|
|
for (const skiplist_entry &entry : skiplist_entries)
|
|
{
|
|
gdb::unique_xmalloc_ptr<char> name (xstrprintf ("%d", entry.number ()));
|
|
if (strncmp (word, name.get (), word_len) == 0)
|
|
completer.add_completion (std::move (name));
|
|
}
|
|
}
|
|
|
|
void
|
|
_initialize_step_skip (void)
|
|
{
|
|
static struct cmd_list_element *skiplist = NULL;
|
|
struct cmd_list_element *c;
|
|
|
|
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);
|
|
|
|
c = 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 [NUMBER | RANGE]..."),
|
|
&skiplist);
|
|
set_cmd_completer (c, complete_skip_number);
|
|
|
|
c = 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 [NUMBER | RANGE]..."),
|
|
&skiplist);
|
|
set_cmd_completer (c, complete_skip_number);
|
|
|
|
c = 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 [NUMBER | RANGES]..."),
|
|
&skiplist);
|
|
set_cmd_completer (c, complete_skip_number);
|
|
|
|
c = add_info ("skip", info_skip_command, _("\
|
|
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 [NUMBER | RANGES]...\n\
|
|
The \"Type\" column indicates one of:\n\
|
|
\tfile - ignored file\n\
|
|
\tfunction - ignored function"));
|
|
set_cmd_completer (c, complete_skip_number);
|
|
|
|
add_setshow_boolean_cmd ("skip", class_maintenance,
|
|
&debug_skip, _("\
|
|
Set whether to print the debug output about skipping files and functions."),
|
|
_("\
|
|
Show whether the debug output about skipping files and functions is printed"),
|
|
_("\
|
|
When non-zero, debug output about skipping files and functions is displayed."),
|
|
NULL, NULL,
|
|
&setdebuglist, &showdebuglist);
|
|
}
|