mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-09 04:21:49 +08:00
492d29ea1c
This patch splits the TRY_CATCH macro into three, so that we go from this: ~~~ volatile gdb_exception ex; TRY_CATCH (ex, RETURN_MASK_ERROR) { } if (ex.reason < 0) { } ~~~ to this: ~~~ TRY { } CATCH (ex, RETURN_MASK_ERROR) { } END_CATCH ~~~ Thus, we'll be getting rid of the local volatile exception object, and declaring the caught exception in the catch block. This allows reimplementing TRY/CATCH in terms of C++ exceptions when building in C++ mode, while still allowing to build GDB in C mode (using setjmp/longjmp), as a transition step. TBC, after this patch, is it _not_ valid to have code between the TRY and the CATCH blocks, like: TRY { } // some code here. CATCH (ex, RETURN_MASK_ERROR) { } END_CATCH Just like it isn't valid to do that with C++'s native try/catch. By switching to creating the exception object inside the CATCH block scope, we can get rid of all the explicitly allocated volatile exception objects all over the tree, and map the CATCH block more directly to C++'s catch blocks. The majority of the TRY_CATCH -> TRY+CATCH+END_CATCH conversion was done with a script, rerun from scratch at every rebase, no manual editing involved. After the mechanical conversion, a few places needed manual intervention, to fix preexisting cases where we were using the exception object outside of the TRY_CATCH block, and cases where we were using "else" after a 'if (ex.reason) < 0)' [a CATCH after this patch]. The result was folded into this patch so that GDB still builds at each incremental step. END_CATCH is necessary for two reasons: First, because we name the exception object in the CATCH block, which requires creating a scope, which in turn must be closed somewhere. Declaring the exception variable in the initializer field of a for block, like: #define CATCH(EXCEPTION, mask) \ for (struct gdb_exception EXCEPTION; \ exceptions_state_mc_catch (&EXCEPTION, MASK); \ EXCEPTION = exception_none) would avoid needing END_CATCH, but alas, in C mode, we build with C90, which doesn't allow mixed declarations and code. Second, because when TRY/CATCH are wired to real C++ try/catch, as long as we need to handle cleanup chains, even if there's no CATCH block that wants to catch the exception, we need for stop at every frame in the unwind chain and run cleanups, then rethrow. That will be done in END_CATCH. After we require C++, we'll still need TRY/CATCH/END_CATCH until cleanups are completely phased out -- TRY/CATCH in C++ mode will save/restore the current cleanup chain, like in C mode, and END_CATCH catches otherwise uncaugh exceptions, runs cleanups and rethrows, so that C++ cleanups and exceptions can coexist. IMO, this still makes the TRY/CATCH code look a bit more like a newcomer would expect, so IMO worth it even if we weren't considering C++. gdb/ChangeLog. 2015-03-07 Pedro Alves <palves@redhat.com> * common/common-exceptions.c (struct catcher) <exception>: No longer a pointer to volatile exception. Now an exception value. <mask>: Delete field. (exceptions_state_mc_init): Remove all parameters. Adjust. (exceptions_state_mc): No longer pop the catcher here. (exceptions_state_mc_catch): New function. (throw_exception): Adjust. * common/common-exceptions.h (exceptions_state_mc_init): Remove all parameters. (exceptions_state_mc_catch): Declare. (TRY_CATCH): Rename to ... (TRY): ... this. Remove EXCEPTION and MASK parameters. (CATCH, END_CATCH): New. All callers adjusted. gdb/gdbserver/ChangeLog: 2015-03-07 Pedro Alves <palves@redhat.com> Adjust all callers of TRY_CATCH to use TRY/CATCH/END_CATCH instead.
1992 lines
57 KiB
C
1992 lines
57 KiB
C
/* Top level stuff for GDB, the GNU debugger.
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Copyright (C) 1986-2015 Free Software Foundation, Inc.
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This file is part of GDB.
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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 "gdbcmd.h"
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#include "cli/cli-cmds.h"
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#include "cli/cli-script.h"
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#include "cli/cli-setshow.h"
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#include "cli/cli-decode.h"
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#include "symtab.h"
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#include "inferior.h"
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#include "infrun.h"
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#include <signal.h>
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#include "target.h"
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#include "target-dcache.h"
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#include "breakpoint.h"
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#include "gdbtypes.h"
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#include "expression.h"
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#include "value.h"
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#include "language.h"
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#include "terminal.h" /* For job_control. */
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#include "annotate.h"
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#include "completer.h"
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#include "top.h"
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#include "version.h"
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#include "serial.h"
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#include "doublest.h"
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#include "main.h"
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#include "event-loop.h"
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#include "gdbthread.h"
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#include "extension.h"
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#include "interps.h"
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#include "observer.h"
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#include "maint.h"
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#include "filenames.h"
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/* readline include files. */
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#include "readline/readline.h"
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#include "readline/history.h"
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/* readline defines this. */
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#undef savestring
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#include <sys/types.h>
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#include "event-top.h"
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#include <sys/stat.h>
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#include <ctype.h>
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#include "ui-out.h"
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#include "cli-out.h"
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#include "tracepoint.h"
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#include "inf-loop.h"
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extern void initialize_all_files (void);
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#define PROMPT(X) the_prompts.prompt_stack[the_prompts.top + X].prompt
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#define PREFIX(X) the_prompts.prompt_stack[the_prompts.top + X].prefix
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#define SUFFIX(X) the_prompts.prompt_stack[the_prompts.top + X].suffix
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/* Default command line prompt. This is overriden in some configs. */
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#ifndef DEFAULT_PROMPT
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#define DEFAULT_PROMPT "(gdb) "
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#endif
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/* Initialization file name for gdb. This is host-dependent. */
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const char gdbinit[] = GDBINIT;
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int inhibit_gdbinit = 0;
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extern char lang_frame_mismatch_warn[]; /* language.c */
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/* Flag for whether we want to confirm potentially dangerous
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operations. Default is yes. */
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int confirm = 1;
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static void
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show_confirm (struct ui_file *file, int from_tty,
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struct cmd_list_element *c, const char *value)
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{
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fprintf_filtered (file, _("Whether to confirm potentially "
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"dangerous operations is %s.\n"),
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value);
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}
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/* stdio stream that command input is being read from. Set to stdin
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normally. Set by source_command to the file we are sourcing. Set
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to NULL if we are executing a user-defined command or interacting
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via a GUI. */
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FILE *instream;
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/* Flag to indicate whether a user defined command is currently running. */
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int in_user_command;
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/* Current working directory. */
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char *current_directory;
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/* The directory name is actually stored here (usually). */
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char gdb_dirbuf[1024];
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/* Function to call before reading a command, if nonzero.
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The function receives two args: an input stream,
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and a prompt string. */
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void (*window_hook) (FILE *, char *);
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/* Buffer used for reading command lines, and the size
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allocated for it so far. */
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char *saved_command_line;
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int saved_command_line_size = 100;
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/* Nonzero if the current command is modified by "server ". This
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affects things like recording into the command history, commands
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repeating on RETURN, etc. This is so a user interface (emacs, GUI,
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whatever) can issue its own commands and also send along commands
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from the user, and have the user not notice that the user interface
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is issuing commands too. */
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int server_command;
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/* Timeout limit for response from target. */
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/* The default value has been changed many times over the years. It
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was originally 5 seconds. But that was thought to be a long time
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to sit and wait, so it was changed to 2 seconds. That was thought
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to be plenty unless the connection was going through some terminal
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server or multiplexer or other form of hairy serial connection.
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In mid-1996, remote_timeout was moved from remote.c to top.c and
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it began being used in other remote-* targets. It appears that the
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default was changed to 20 seconds at that time, perhaps because the
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Renesas E7000 ICE didn't always respond in a timely manner.
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But if 5 seconds is a long time to sit and wait for retransmissions,
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20 seconds is far worse. This demonstrates the difficulty of using
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a single variable for all protocol timeouts.
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As remote.c is used much more than remote-e7000.c, it was changed
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back to 2 seconds in 1999. */
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int remote_timeout = 2;
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/* Non-zero tells remote* modules to output debugging info. */
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int remote_debug = 0;
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/* Sbrk location on entry to main. Used for statistics only. */
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#ifdef HAVE_SBRK
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char *lim_at_start;
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#endif
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/* Hooks for alternate command interfaces. */
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/* Called after most modules have been initialized, but before taking
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users command file.
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If the UI fails to initialize and it wants GDB to continue using
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the default UI, then it should clear this hook before returning. */
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void (*deprecated_init_ui_hook) (char *argv0);
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/* This hook is called from within gdb's many mini-event loops which
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could steal control from a real user interface's event loop. It
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returns non-zero if the user is requesting a detach, zero
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otherwise. */
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int (*deprecated_ui_loop_hook) (int);
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/* Called from print_frame_info to list the line we stopped in. */
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void (*deprecated_print_frame_info_listing_hook) (struct symtab * s,
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int line,
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int stopline,
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int noerror);
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/* Replaces most of query. */
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int (*deprecated_query_hook) (const char *, va_list);
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/* Replaces most of warning. */
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void (*deprecated_warning_hook) (const char *, va_list);
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/* These three functions support getting lines of text from the user.
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They are used in sequence. First deprecated_readline_begin_hook is
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called with a text string that might be (for example) a message for
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the user to type in a sequence of commands to be executed at a
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breakpoint. If this function calls back to a GUI, it might take
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this opportunity to pop up a text interaction window with this
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message. Next, deprecated_readline_hook is called with a prompt
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that is emitted prior to collecting the user input. It can be
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called multiple times. Finally, deprecated_readline_end_hook is
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called to notify the GUI that we are done with the interaction
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window and it can close it. */
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void (*deprecated_readline_begin_hook) (char *, ...);
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char *(*deprecated_readline_hook) (const char *);
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void (*deprecated_readline_end_hook) (void);
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/* Called as appropriate to notify the interface that we have attached
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to or detached from an already running process. */
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void (*deprecated_attach_hook) (void);
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void (*deprecated_detach_hook) (void);
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/* Called during long calculations to allow GUI to repair window
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damage, and to check for stop buttons, etc... */
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void (*deprecated_interactive_hook) (void);
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/* Tell the GUI someone changed the register REGNO. -1 means
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that the caller does not know which register changed or
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that several registers have changed (see value_assign). */
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void (*deprecated_register_changed_hook) (int regno);
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/* Called when going to wait for the target. Usually allows the GUI
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to run while waiting for target events. */
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ptid_t (*deprecated_target_wait_hook) (ptid_t ptid,
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struct target_waitstatus *status,
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int options);
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/* Used by UI as a wrapper around command execution. May do various
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things like enabling/disabling buttons, etc... */
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void (*deprecated_call_command_hook) (struct cmd_list_element * c,
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char *cmd, int from_tty);
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/* Called when the current thread changes. Argument is thread id. */
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void (*deprecated_context_hook) (int id);
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/* Handler for SIGHUP. */
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#ifdef SIGHUP
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/* NOTE 1999-04-29: This function will be static again, once we modify
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gdb to use the event loop as the default command loop and we merge
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event-top.c into this file, top.c. */
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/* static */ void
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quit_cover (void)
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{
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/* Stop asking user for confirmation --- we're exiting. This
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prevents asking the user dumb questions. */
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confirm = 0;
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quit_command ((char *) 0, 0);
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}
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#endif /* defined SIGHUP */
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/* Line number we are currently in, in a file which is being sourced. */
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/* NOTE 1999-04-29: This variable will be static again, once we modify
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gdb to use the event loop as the default command loop and we merge
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event-top.c into this file, top.c. */
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/* static */ int source_line_number;
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/* Name of the file we are sourcing. */
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/* NOTE 1999-04-29: This variable will be static again, once we modify
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gdb to use the event loop as the default command loop and we merge
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event-top.c into this file, top.c. */
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/* static */ const char *source_file_name;
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/* Clean up on error during a "source" command (or execution of a
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user-defined command). */
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void
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do_restore_instream_cleanup (void *stream)
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{
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/* Restore the previous input stream. */
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instream = stream;
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}
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/* Read commands from STREAM. */
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void
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read_command_file (FILE *stream)
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{
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struct cleanup *cleanups;
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cleanups = make_cleanup (do_restore_instream_cleanup, instream);
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instream = stream;
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command_loop ();
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do_cleanups (cleanups);
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}
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void (*pre_init_ui_hook) (void);
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#ifdef __MSDOS__
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static void
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do_chdir_cleanup (void *old_dir)
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{
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chdir (old_dir);
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xfree (old_dir);
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}
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#endif
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struct cleanup *
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prepare_execute_command (void)
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{
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struct value *mark;
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struct cleanup *cleanup;
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mark = value_mark ();
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cleanup = make_cleanup_value_free_to_mark (mark);
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/* With multiple threads running while the one we're examining is
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stopped, the dcache can get stale without us being able to detect
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it. For the duration of the command, though, use the dcache to
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help things like backtrace. */
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if (non_stop)
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target_dcache_invalidate ();
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return cleanup;
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}
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/* Tell the user if the language has changed (except first time) after
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executing a command. */
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void
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check_frame_language_change (void)
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{
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static int warned = 0;
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/* First make sure that a new frame has been selected, in case the
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command or the hooks changed the program state. */
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deprecated_safe_get_selected_frame ();
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if (current_language != expected_language)
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{
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if (language_mode == language_mode_auto && info_verbose)
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{
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language_info (1); /* Print what changed. */
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}
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warned = 0;
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}
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/* Warn the user if the working language does not match the language
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of the current frame. Only warn the user if we are actually
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running the program, i.e. there is a stack. */
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/* FIXME: This should be cacheing the frame and only running when
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the frame changes. */
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if (has_stack_frames ())
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{
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enum language flang;
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flang = get_frame_language ();
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if (!warned
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&& flang != language_unknown
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&& flang != current_language->la_language)
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{
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printf_filtered ("%s\n", lang_frame_mismatch_warn);
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warned = 1;
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}
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}
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}
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/* See top.h. */
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void
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maybe_wait_sync_command_done (int was_sync)
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{
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/* If the interpreter is in sync mode (we're running a user
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command's list, running command hooks or similars), and we
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just ran a synchronous command that started the target, wait
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for that command to end. */
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if (!interpreter_async && !was_sync && sync_execution)
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{
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while (gdb_do_one_event () >= 0)
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if (!sync_execution)
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break;
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}
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}
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/* Execute the line P as a command, in the current user context.
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Pass FROM_TTY as second argument to the defining function. */
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void
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execute_command (char *p, int from_tty)
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{
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struct cleanup *cleanup_if_error, *cleanup;
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struct cmd_list_element *c;
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char *line;
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cleanup_if_error = make_bpstat_clear_actions_cleanup ();
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cleanup = prepare_execute_command ();
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/* Force cleanup of any alloca areas if using C alloca instead of
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a builtin alloca. */
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alloca (0);
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/* This can happen when command_line_input hits end of file. */
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if (p == NULL)
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{
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do_cleanups (cleanup);
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discard_cleanups (cleanup_if_error);
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return;
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}
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target_log_command (p);
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while (*p == ' ' || *p == '\t')
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p++;
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if (*p)
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{
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const char *cmd = p;
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char *arg;
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int was_sync = sync_execution;
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line = p;
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/* If trace-commands is set then this will print this command. */
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print_command_trace (p);
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c = lookup_cmd (&cmd, cmdlist, "", 0, 1);
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p = (char *) cmd;
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/* Pass null arg rather than an empty one. */
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arg = *p ? p : 0;
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/* FIXME: cagney/2002-02-02: The c->type test is pretty dodgy
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while the is_complete_command(cfunc) test is just plain
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bogus. They should both be replaced by a test of the form
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c->strip_trailing_white_space_p. */
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/* NOTE: cagney/2002-02-02: The function.cfunc in the below
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can't be replaced with func. This is because it is the
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cfunc, and not the func, that has the value that the
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is_complete_command hack is testing for. */
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/* Clear off trailing whitespace, except for set and complete
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command. */
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if (arg
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&& c->type != set_cmd
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&& !is_complete_command (c))
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{
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p = arg + strlen (arg) - 1;
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while (p >= arg && (*p == ' ' || *p == '\t'))
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p--;
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*(p + 1) = '\0';
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}
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/* If this command has been pre-hooked, run the hook first. */
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execute_cmd_pre_hook (c);
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if (c->deprecated_warn_user)
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deprecated_cmd_warning (line);
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/* c->user_commands would be NULL in the case of a python command. */
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if (c->theclass == class_user && c->user_commands)
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execute_user_command (c, arg);
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else if (c->type == set_cmd)
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do_set_command (arg, from_tty, c);
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else if (c->type == show_cmd)
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do_show_command (arg, from_tty, c);
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||
else if (!cmd_func_p (c))
|
||
error (_("That is not a command, just a help topic."));
|
||
else if (deprecated_call_command_hook)
|
||
deprecated_call_command_hook (c, arg, from_tty);
|
||
else
|
||
cmd_func (c, arg, from_tty);
|
||
|
||
maybe_wait_sync_command_done (was_sync);
|
||
|
||
/* If this command has been post-hooked, run the hook last. */
|
||
execute_cmd_post_hook (c);
|
||
|
||
}
|
||
|
||
check_frame_language_change ();
|
||
|
||
do_cleanups (cleanup);
|
||
discard_cleanups (cleanup_if_error);
|
||
}
|
||
|
||
/* Run execute_command for P and FROM_TTY. Capture its output into the
|
||
returned string, do not display it to the screen. BATCH_FLAG will be
|
||
temporarily set to true. */
|
||
|
||
char *
|
||
execute_command_to_string (char *p, int from_tty)
|
||
{
|
||
struct ui_file *str_file;
|
||
struct cleanup *cleanup;
|
||
char *retval;
|
||
|
||
/* GDB_STDOUT should be better already restored during these
|
||
restoration callbacks. */
|
||
cleanup = set_batch_flag_and_make_cleanup_restore_page_info ();
|
||
|
||
make_cleanup_restore_integer (&interpreter_async);
|
||
interpreter_async = 0;
|
||
|
||
str_file = mem_fileopen ();
|
||
|
||
make_cleanup_ui_file_delete (str_file);
|
||
make_cleanup_restore_ui_file (&gdb_stdout);
|
||
make_cleanup_restore_ui_file (&gdb_stderr);
|
||
make_cleanup_restore_ui_file (&gdb_stdlog);
|
||
make_cleanup_restore_ui_file (&gdb_stdtarg);
|
||
make_cleanup_restore_ui_file (&gdb_stdtargerr);
|
||
|
||
if (ui_out_redirect (current_uiout, str_file) < 0)
|
||
warning (_("Current output protocol does not support redirection"));
|
||
else
|
||
make_cleanup_ui_out_redirect_pop (current_uiout);
|
||
|
||
gdb_stdout = str_file;
|
||
gdb_stderr = str_file;
|
||
gdb_stdlog = str_file;
|
||
gdb_stdtarg = str_file;
|
||
gdb_stdtargerr = str_file;
|
||
|
||
execute_command (p, from_tty);
|
||
|
||
retval = ui_file_xstrdup (str_file, NULL);
|
||
|
||
do_cleanups (cleanup);
|
||
|
||
return retval;
|
||
}
|
||
|
||
/* Read commands from `instream' and execute them
|
||
until end of file or error reading instream. */
|
||
|
||
void
|
||
command_loop (void)
|
||
{
|
||
struct cleanup *old_chain;
|
||
char *command;
|
||
int stdin_is_tty = ISATTY (stdin);
|
||
|
||
while (instream && !feof (instream))
|
||
{
|
||
if (window_hook && instream == stdin)
|
||
(*window_hook) (instream, get_prompt ());
|
||
|
||
clear_quit_flag ();
|
||
if (instream == stdin && stdin_is_tty)
|
||
reinitialize_more_filter ();
|
||
old_chain = make_cleanup (null_cleanup, 0);
|
||
|
||
/* Get a command-line. This calls the readline package. */
|
||
command = command_line_input (instream == stdin ?
|
||
get_prompt () : (char *) NULL,
|
||
instream == stdin, "prompt");
|
||
if (command == 0)
|
||
{
|
||
do_cleanups (old_chain);
|
||
return;
|
||
}
|
||
|
||
make_command_stats_cleanup (1);
|
||
|
||
/* Do not execute commented lines. */
|
||
if (command[0] != '#')
|
||
{
|
||
execute_command (command, instream == stdin);
|
||
|
||
/* Do any commands attached to breakpoint we are stopped at. */
|
||
bpstat_do_actions ();
|
||
}
|
||
do_cleanups (old_chain);
|
||
}
|
||
}
|
||
|
||
/* When nonzero, cause dont_repeat to do nothing. This should only be
|
||
set via prevent_dont_repeat. */
|
||
|
||
static int suppress_dont_repeat = 0;
|
||
|
||
/* Commands call this if they do not want to be repeated by null lines. */
|
||
|
||
void
|
||
dont_repeat (void)
|
||
{
|
||
if (suppress_dont_repeat || server_command)
|
||
return;
|
||
|
||
/* If we aren't reading from standard input, we are saving the last
|
||
thing read from stdin in line and don't want to delete it. Null
|
||
lines won't repeat here in any case. */
|
||
if (instream == stdin)
|
||
*saved_command_line = 0;
|
||
}
|
||
|
||
/* Prevent dont_repeat from working, and return a cleanup that
|
||
restores the previous state. */
|
||
|
||
struct cleanup *
|
||
prevent_dont_repeat (void)
|
||
{
|
||
struct cleanup *result = make_cleanup_restore_integer (&suppress_dont_repeat);
|
||
|
||
suppress_dont_repeat = 1;
|
||
return result;
|
||
}
|
||
|
||
|
||
/* Read a line from the stream "instream" without command line editing.
|
||
|
||
It prints PROMPT_ARG once at the start.
|
||
Action is compatible with "readline", e.g. space for the result is
|
||
malloc'd and should be freed by the caller.
|
||
|
||
A NULL return means end of file. */
|
||
char *
|
||
gdb_readline (const char *prompt_arg)
|
||
{
|
||
int c;
|
||
char *result;
|
||
int input_index = 0;
|
||
int result_size = 80;
|
||
|
||
if (prompt_arg)
|
||
{
|
||
/* Don't use a _filtered function here. It causes the assumed
|
||
character position to be off, since the newline we read from
|
||
the user is not accounted for. */
|
||
fputs_unfiltered (prompt_arg, gdb_stdout);
|
||
gdb_flush (gdb_stdout);
|
||
}
|
||
|
||
result = (char *) xmalloc (result_size);
|
||
|
||
while (1)
|
||
{
|
||
/* Read from stdin if we are executing a user defined command.
|
||
This is the right thing for prompt_for_continue, at least. */
|
||
c = fgetc (instream ? instream : stdin);
|
||
|
||
if (c == EOF)
|
||
{
|
||
if (input_index > 0)
|
||
/* The last line does not end with a newline. Return it, and
|
||
if we are called again fgetc will still return EOF and
|
||
we'll return NULL then. */
|
||
break;
|
||
xfree (result);
|
||
return NULL;
|
||
}
|
||
|
||
if (c == '\n')
|
||
{
|
||
if (input_index > 0 && result[input_index - 1] == '\r')
|
||
input_index--;
|
||
break;
|
||
}
|
||
|
||
result[input_index++] = c;
|
||
while (input_index >= result_size)
|
||
{
|
||
result_size *= 2;
|
||
result = (char *) xrealloc (result, result_size);
|
||
}
|
||
}
|
||
|
||
result[input_index++] = '\0';
|
||
return result;
|
||
}
|
||
|
||
/* Variables which control command line editing and history
|
||
substitution. These variables are given default values at the end
|
||
of this file. */
|
||
static int command_editing_p;
|
||
|
||
/* NOTE 1999-04-29: This variable will be static again, once we modify
|
||
gdb to use the event loop as the default command loop and we merge
|
||
event-top.c into this file, top.c. */
|
||
|
||
/* static */ int history_expansion_p;
|
||
|
||
static int write_history_p;
|
||
static void
|
||
show_write_history_p (struct ui_file *file, int from_tty,
|
||
struct cmd_list_element *c, const char *value)
|
||
{
|
||
fprintf_filtered (file, _("Saving of the history record on exit is %s.\n"),
|
||
value);
|
||
}
|
||
|
||
/* The variable associated with the "set/show history size"
|
||
command. */
|
||
static unsigned int history_size_setshow_var;
|
||
|
||
static void
|
||
show_history_size (struct ui_file *file, int from_tty,
|
||
struct cmd_list_element *c, const char *value)
|
||
{
|
||
fprintf_filtered (file, _("The size of the command history is %s.\n"),
|
||
value);
|
||
}
|
||
|
||
static char *history_filename;
|
||
static void
|
||
show_history_filename (struct ui_file *file, int from_tty,
|
||
struct cmd_list_element *c, const char *value)
|
||
{
|
||
fprintf_filtered (file, _("The filename in which to record "
|
||
"the command history is \"%s\".\n"),
|
||
value);
|
||
}
|
||
|
||
/* This is like readline(), but it has some gdb-specific behavior.
|
||
gdb may want readline in both the synchronous and async modes during
|
||
a single gdb invocation. At the ordinary top-level prompt we might
|
||
be using the async readline. That means we can't use
|
||
rl_pre_input_hook, since it doesn't work properly in async mode.
|
||
However, for a secondary prompt (" >", such as occurs during a
|
||
`define'), gdb wants a synchronous response.
|
||
|
||
We used to call readline() directly, running it in synchronous
|
||
mode. But mixing modes this way is not supported, and as of
|
||
readline 5.x it no longer works; the arrow keys come unbound during
|
||
the synchronous call. So we make a nested call into the event
|
||
loop. That's what gdb_readline_wrapper is for. */
|
||
|
||
/* A flag set as soon as gdb_readline_wrapper_line is called; we can't
|
||
rely on gdb_readline_wrapper_result, which might still be NULL if
|
||
the user types Control-D for EOF. */
|
||
static int gdb_readline_wrapper_done;
|
||
|
||
/* The result of the current call to gdb_readline_wrapper, once a newline
|
||
is seen. */
|
||
static char *gdb_readline_wrapper_result;
|
||
|
||
/* Any intercepted hook. Operate-and-get-next sets this, expecting it
|
||
to be called after the newline is processed (which will redisplay
|
||
the prompt). But in gdb_readline_wrapper we will not get a new
|
||
prompt until the next call, or until we return to the event loop.
|
||
So we disable this hook around the newline and restore it before we
|
||
return. */
|
||
static void (*saved_after_char_processing_hook) (void);
|
||
|
||
/* This function is called when readline has seen a complete line of
|
||
text. */
|
||
|
||
static void
|
||
gdb_readline_wrapper_line (char *line)
|
||
{
|
||
gdb_assert (!gdb_readline_wrapper_done);
|
||
gdb_readline_wrapper_result = line;
|
||
gdb_readline_wrapper_done = 1;
|
||
|
||
/* Prevent operate-and-get-next from acting too early. */
|
||
saved_after_char_processing_hook = after_char_processing_hook;
|
||
after_char_processing_hook = NULL;
|
||
|
||
/* Prevent parts of the prompt from being redisplayed if annotations
|
||
are enabled, and readline's state getting out of sync. We'll
|
||
reinstall the callback handler, which puts the terminal in raw
|
||
mode (or in readline lingo, in prepped state), when we're next
|
||
ready to process user input, either in display_gdb_prompt, or if
|
||
we're handling an asynchronous target event and running in the
|
||
background, just before returning to the event loop to process
|
||
further input (or more target events). */
|
||
if (async_command_editing_p)
|
||
gdb_rl_callback_handler_remove ();
|
||
}
|
||
|
||
struct gdb_readline_wrapper_cleanup
|
||
{
|
||
void (*handler_orig) (char *);
|
||
int already_prompted_orig;
|
||
|
||
/* Whether the target was async. */
|
||
int target_is_async_orig;
|
||
};
|
||
|
||
static void
|
||
gdb_readline_wrapper_cleanup (void *arg)
|
||
{
|
||
struct gdb_readline_wrapper_cleanup *cleanup = arg;
|
||
|
||
rl_already_prompted = cleanup->already_prompted_orig;
|
||
|
||
gdb_assert (input_handler == gdb_readline_wrapper_line);
|
||
input_handler = cleanup->handler_orig;
|
||
|
||
/* Don't restore our input handler in readline yet. That would make
|
||
readline prep the terminal (putting it in raw mode), while the
|
||
line we just read may trigger execution of a command that expects
|
||
the terminal in the default cooked/canonical mode, such as e.g.,
|
||
running Python's interactive online help utility. See
|
||
gdb_readline_wrapper_line for when we'll reinstall it. */
|
||
|
||
gdb_readline_wrapper_result = NULL;
|
||
gdb_readline_wrapper_done = 0;
|
||
|
||
after_char_processing_hook = saved_after_char_processing_hook;
|
||
saved_after_char_processing_hook = NULL;
|
||
|
||
if (cleanup->target_is_async_orig)
|
||
target_async (inferior_event_handler, 0);
|
||
|
||
xfree (cleanup);
|
||
}
|
||
|
||
char *
|
||
gdb_readline_wrapper (const char *prompt)
|
||
{
|
||
struct cleanup *back_to;
|
||
struct gdb_readline_wrapper_cleanup *cleanup;
|
||
char *retval;
|
||
|
||
cleanup = xmalloc (sizeof (*cleanup));
|
||
cleanup->handler_orig = input_handler;
|
||
input_handler = gdb_readline_wrapper_line;
|
||
|
||
cleanup->already_prompted_orig = rl_already_prompted;
|
||
|
||
cleanup->target_is_async_orig = target_is_async_p ();
|
||
|
||
back_to = make_cleanup (gdb_readline_wrapper_cleanup, cleanup);
|
||
|
||
if (cleanup->target_is_async_orig)
|
||
target_async (NULL, NULL);
|
||
|
||
/* Display our prompt and prevent double prompt display. */
|
||
display_gdb_prompt (prompt);
|
||
rl_already_prompted = 1;
|
||
|
||
if (after_char_processing_hook)
|
||
(*after_char_processing_hook) ();
|
||
gdb_assert (after_char_processing_hook == NULL);
|
||
|
||
while (gdb_do_one_event () >= 0)
|
||
if (gdb_readline_wrapper_done)
|
||
break;
|
||
|
||
retval = gdb_readline_wrapper_result;
|
||
do_cleanups (back_to);
|
||
return retval;
|
||
}
|
||
|
||
|
||
/* The current saved history number from operate-and-get-next.
|
||
This is -1 if not valid. */
|
||
static int operate_saved_history = -1;
|
||
|
||
/* This is put on the appropriate hook and helps operate-and-get-next
|
||
do its work. */
|
||
static void
|
||
gdb_rl_operate_and_get_next_completion (void)
|
||
{
|
||
int delta = where_history () - operate_saved_history;
|
||
|
||
/* The `key' argument to rl_get_previous_history is ignored. */
|
||
rl_get_previous_history (delta, 0);
|
||
operate_saved_history = -1;
|
||
|
||
/* readline doesn't automatically update the display for us. */
|
||
rl_redisplay ();
|
||
|
||
after_char_processing_hook = NULL;
|
||
rl_pre_input_hook = NULL;
|
||
}
|
||
|
||
/* This is a gdb-local readline command handler. It accepts the
|
||
current command line (like RET does) and, if this command was taken
|
||
from the history, arranges for the next command in the history to
|
||
appear on the command line when the prompt returns.
|
||
We ignore the arguments. */
|
||
static int
|
||
gdb_rl_operate_and_get_next (int count, int key)
|
||
{
|
||
int where;
|
||
|
||
/* Use the async hook. */
|
||
after_char_processing_hook = gdb_rl_operate_and_get_next_completion;
|
||
|
||
/* Find the current line, and find the next line to use. */
|
||
where = where_history();
|
||
|
||
if ((history_is_stifled () && (history_length >= history_max_entries))
|
||
|| (where >= history_length - 1))
|
||
operate_saved_history = where;
|
||
else
|
||
operate_saved_history = where + 1;
|
||
|
||
return rl_newline (1, key);
|
||
}
|
||
|
||
/* Number of user commands executed during this session. */
|
||
|
||
static int command_count = 0;
|
||
|
||
/* Add the user command COMMAND to the input history list. */
|
||
|
||
void
|
||
gdb_add_history (const char *command)
|
||
{
|
||
add_history (command);
|
||
command_count++;
|
||
}
|
||
|
||
/* Safely append new history entries to the history file in a corruption-free
|
||
way using an intermediate local history file. */
|
||
|
||
static void
|
||
gdb_safe_append_history (void)
|
||
{
|
||
int ret, saved_errno;
|
||
char *local_history_filename;
|
||
struct cleanup *old_chain;
|
||
|
||
local_history_filename
|
||
= xstrprintf ("%s-gdb%d~", history_filename, getpid ());
|
||
old_chain = make_cleanup (xfree, local_history_filename);
|
||
|
||
ret = rename (history_filename, local_history_filename);
|
||
saved_errno = errno;
|
||
if (ret < 0 && saved_errno != ENOENT)
|
||
{
|
||
warning (_("Could not rename %s to %s: %s"),
|
||
history_filename, local_history_filename,
|
||
safe_strerror (saved_errno));
|
||
}
|
||
else
|
||
{
|
||
if (ret < 0)
|
||
{
|
||
/* If the rename failed with ENOENT then either the global history
|
||
file never existed in the first place or another GDB process is
|
||
currently appending to it (and has thus temporarily renamed it).
|
||
Since we can't distinguish between these two cases, we have to
|
||
conservatively assume the first case and therefore must write out
|
||
(not append) our known history to our local history file and try
|
||
to move it back anyway. Otherwise a global history file would
|
||
never get created! */
|
||
gdb_assert (saved_errno == ENOENT);
|
||
write_history (local_history_filename);
|
||
}
|
||
else
|
||
{
|
||
append_history (command_count, local_history_filename);
|
||
history_truncate_file (local_history_filename, history_max_entries);
|
||
}
|
||
|
||
ret = rename (local_history_filename, history_filename);
|
||
saved_errno = errno;
|
||
if (ret < 0 && saved_errno != EEXIST)
|
||
warning (_("Could not rename %s to %s: %s"),
|
||
local_history_filename, history_filename,
|
||
safe_strerror (saved_errno));
|
||
}
|
||
|
||
do_cleanups (old_chain);
|
||
}
|
||
|
||
/* Read one line from the command input stream `instream'
|
||
into the local static buffer `linebuffer' (whose current length
|
||
is `linelength').
|
||
The buffer is made bigger as necessary.
|
||
Returns the address of the start of the line.
|
||
|
||
NULL is returned for end of file.
|
||
|
||
*If* the instream == stdin & stdin is a terminal, the line read
|
||
is copied into the file line saver (global var char *line,
|
||
length linesize) so that it can be duplicated.
|
||
|
||
This routine either uses fancy command line editing or
|
||
simple input as the user has requested. */
|
||
|
||
char *
|
||
command_line_input (const char *prompt_arg, int repeat, char *annotation_suffix)
|
||
{
|
||
static char *linebuffer = 0;
|
||
static unsigned linelength = 0;
|
||
const char *prompt = prompt_arg;
|
||
char *p;
|
||
char *p1;
|
||
char *rl;
|
||
char *nline;
|
||
char got_eof = 0;
|
||
|
||
/* The annotation suffix must be non-NULL. */
|
||
if (annotation_suffix == NULL)
|
||
annotation_suffix = "";
|
||
|
||
if (annotation_level > 1 && instream == stdin)
|
||
{
|
||
char *local_prompt;
|
||
|
||
local_prompt = alloca ((prompt == NULL ? 0 : strlen (prompt))
|
||
+ strlen (annotation_suffix) + 40);
|
||
if (prompt == NULL)
|
||
local_prompt[0] = '\0';
|
||
else
|
||
strcpy (local_prompt, prompt);
|
||
strcat (local_prompt, "\n\032\032");
|
||
strcat (local_prompt, annotation_suffix);
|
||
strcat (local_prompt, "\n");
|
||
|
||
prompt = local_prompt;
|
||
}
|
||
|
||
if (linebuffer == 0)
|
||
{
|
||
linelength = 80;
|
||
linebuffer = (char *) xmalloc (linelength);
|
||
}
|
||
|
||
p = linebuffer;
|
||
|
||
/* Control-C quits instantly if typed while in this loop
|
||
since it should not wait until the user types a newline. */
|
||
immediate_quit++;
|
||
QUIT;
|
||
#ifdef STOP_SIGNAL
|
||
if (job_control)
|
||
signal (STOP_SIGNAL, handle_stop_sig);
|
||
#endif
|
||
|
||
while (1)
|
||
{
|
||
/* Make sure that all output has been output. Some machines may
|
||
let you get away with leaving out some of the gdb_flush, but
|
||
not all. */
|
||
wrap_here ("");
|
||
gdb_flush (gdb_stdout);
|
||
gdb_flush (gdb_stderr);
|
||
|
||
if (source_file_name != NULL)
|
||
++source_line_number;
|
||
|
||
if (annotation_level > 1 && instream == stdin)
|
||
{
|
||
puts_unfiltered ("\n\032\032pre-");
|
||
puts_unfiltered (annotation_suffix);
|
||
puts_unfiltered ("\n");
|
||
}
|
||
|
||
/* Don't use fancy stuff if not talking to stdin. */
|
||
if (deprecated_readline_hook && input_from_terminal_p ())
|
||
{
|
||
rl = (*deprecated_readline_hook) (prompt);
|
||
}
|
||
else if (command_editing_p && input_from_terminal_p ())
|
||
{
|
||
rl = gdb_readline_wrapper (prompt);
|
||
}
|
||
else
|
||
{
|
||
rl = gdb_readline (prompt);
|
||
}
|
||
|
||
if (annotation_level > 1 && instream == stdin)
|
||
{
|
||
puts_unfiltered ("\n\032\032post-");
|
||
puts_unfiltered (annotation_suffix);
|
||
puts_unfiltered ("\n");
|
||
}
|
||
|
||
if (!rl || rl == (char *) EOF)
|
||
{
|
||
got_eof = 1;
|
||
break;
|
||
}
|
||
if (strlen (rl) + 1 + (p - linebuffer) > linelength)
|
||
{
|
||
linelength = strlen (rl) + 1 + (p - linebuffer);
|
||
nline = (char *) xrealloc (linebuffer, linelength);
|
||
p += nline - linebuffer;
|
||
linebuffer = nline;
|
||
}
|
||
p1 = rl;
|
||
/* Copy line. Don't copy null at end. (Leaves line alone
|
||
if this was just a newline). */
|
||
while (*p1)
|
||
*p++ = *p1++;
|
||
|
||
xfree (rl); /* Allocated in readline. */
|
||
|
||
if (p == linebuffer || *(p - 1) != '\\')
|
||
break;
|
||
|
||
p--; /* Put on top of '\'. */
|
||
prompt = NULL;
|
||
}
|
||
|
||
#ifdef STOP_SIGNAL
|
||
if (job_control)
|
||
signal (STOP_SIGNAL, SIG_DFL);
|
||
#endif
|
||
immediate_quit--;
|
||
|
||
if (got_eof)
|
||
return NULL;
|
||
|
||
#define SERVER_COMMAND_LENGTH 7
|
||
server_command =
|
||
(p - linebuffer > SERVER_COMMAND_LENGTH)
|
||
&& strncmp (linebuffer, "server ", SERVER_COMMAND_LENGTH) == 0;
|
||
if (server_command)
|
||
{
|
||
/* Note that we don't set `line'. Between this and the check in
|
||
dont_repeat, this insures that repeating will still do the
|
||
right thing. */
|
||
*p = '\0';
|
||
return linebuffer + SERVER_COMMAND_LENGTH;
|
||
}
|
||
|
||
/* Do history expansion if that is wished. */
|
||
if (history_expansion_p && instream == stdin
|
||
&& ISATTY (instream))
|
||
{
|
||
char *history_value;
|
||
int expanded;
|
||
|
||
*p = '\0'; /* Insert null now. */
|
||
expanded = history_expand (linebuffer, &history_value);
|
||
if (expanded)
|
||
{
|
||
/* Print the changes. */
|
||
printf_unfiltered ("%s\n", history_value);
|
||
|
||
/* If there was an error, call this function again. */
|
||
if (expanded < 0)
|
||
{
|
||
xfree (history_value);
|
||
return command_line_input (prompt, repeat,
|
||
annotation_suffix);
|
||
}
|
||
if (strlen (history_value) > linelength)
|
||
{
|
||
linelength = strlen (history_value) + 1;
|
||
linebuffer = (char *) xrealloc (linebuffer, linelength);
|
||
}
|
||
strcpy (linebuffer, history_value);
|
||
p = linebuffer + strlen (linebuffer);
|
||
}
|
||
xfree (history_value);
|
||
}
|
||
|
||
/* If we just got an empty line, and that is supposed to repeat the
|
||
previous command, return the value in the global buffer. */
|
||
if (repeat && p == linebuffer)
|
||
return saved_command_line;
|
||
for (p1 = linebuffer; *p1 == ' ' || *p1 == '\t'; p1++);
|
||
if (repeat && !*p1)
|
||
return saved_command_line;
|
||
|
||
*p = 0;
|
||
|
||
/* Add line to history if appropriate. */
|
||
if (*linebuffer && input_from_terminal_p ())
|
||
gdb_add_history (linebuffer);
|
||
|
||
/* Save into global buffer if appropriate. */
|
||
if (repeat)
|
||
{
|
||
if (linelength > saved_command_line_size)
|
||
{
|
||
saved_command_line = xrealloc (saved_command_line, linelength);
|
||
saved_command_line_size = linelength;
|
||
}
|
||
strcpy (saved_command_line, linebuffer);
|
||
return saved_command_line;
|
||
}
|
||
|
||
return linebuffer;
|
||
}
|
||
|
||
/* Print the GDB banner. */
|
||
void
|
||
print_gdb_version (struct ui_file *stream)
|
||
{
|
||
/* From GNU coding standards, first line is meant to be easy for a
|
||
program to parse, and is just canonical program name and version
|
||
number, which starts after last space. */
|
||
|
||
fprintf_filtered (stream, "GNU gdb %s%s\n", PKGVERSION, version);
|
||
|
||
/* Second line is a copyright notice. */
|
||
|
||
fprintf_filtered (stream,
|
||
"Copyright (C) 2015 Free Software Foundation, Inc.\n");
|
||
|
||
/* Following the copyright is a brief statement that the program is
|
||
free software, that users are free to copy and change it on
|
||
certain conditions, that it is covered by the GNU GPL, and that
|
||
there is no warranty. */
|
||
|
||
fprintf_filtered (stream, "\
|
||
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\
|
||
\nThis is free software: you are free to change and redistribute it.\n\
|
||
There is NO WARRANTY, to the extent permitted by law. Type \"show copying\"\n\
|
||
and \"show warranty\" for details.\n");
|
||
|
||
/* After the required info we print the configuration information. */
|
||
|
||
fprintf_filtered (stream, "This GDB was configured as \"");
|
||
if (strcmp (host_name, target_name) != 0)
|
||
{
|
||
fprintf_filtered (stream, "--host=%s --target=%s",
|
||
host_name, target_name);
|
||
}
|
||
else
|
||
{
|
||
fprintf_filtered (stream, "%s", host_name);
|
||
}
|
||
fprintf_filtered (stream, "\".\n\
|
||
Type \"show configuration\" for configuration details.");
|
||
|
||
if (REPORT_BUGS_TO[0])
|
||
{
|
||
fprintf_filtered (stream,
|
||
_("\nFor bug reporting instructions, please see:\n"));
|
||
fprintf_filtered (stream, "%s.\n", REPORT_BUGS_TO);
|
||
}
|
||
fprintf_filtered (stream,
|
||
_("Find the GDB manual and other documentation \
|
||
resources online at:\n<http://www.gnu.org/software/gdb/documentation/>.\n"));
|
||
fprintf_filtered (stream, _("For help, type \"help\".\n"));
|
||
fprintf_filtered (stream, _("Type \"apropos word\" to search for \
|
||
commands related to \"word\"."));
|
||
}
|
||
|
||
/* Print the details of GDB build-time configuration. */
|
||
void
|
||
print_gdb_configuration (struct ui_file *stream)
|
||
{
|
||
fprintf_filtered (stream, _("\
|
||
This GDB was configured as follows:\n\
|
||
configure --host=%s --target=%s\n\
|
||
"), host_name, target_name);
|
||
fprintf_filtered (stream, _("\
|
||
--with-auto-load-dir=%s\n\
|
||
--with-auto-load-safe-path=%s\n\
|
||
"), AUTO_LOAD_DIR, AUTO_LOAD_SAFE_PATH);
|
||
#if HAVE_LIBEXPAT
|
||
fprintf_filtered (stream, _("\
|
||
--with-expat\n\
|
||
"));
|
||
#else
|
||
fprintf_filtered (stream, _("\
|
||
--without-expat\n\
|
||
"));
|
||
#endif
|
||
if (GDB_DATADIR[0])
|
||
fprintf_filtered (stream, _("\
|
||
--with-gdb-datadir=%s%s\n\
|
||
"), GDB_DATADIR, GDB_DATADIR_RELOCATABLE ? " (relocatable)" : "");
|
||
#ifdef ICONV_BIN
|
||
fprintf_filtered (stream, _("\
|
||
--with-iconv-bin=%s%s\n\
|
||
"), ICONV_BIN, ICONV_BIN_RELOCATABLE ? " (relocatable)" : "");
|
||
#endif
|
||
if (JIT_READER_DIR[0])
|
||
fprintf_filtered (stream, _("\
|
||
--with-jit-reader-dir=%s%s\n\
|
||
"), JIT_READER_DIR, JIT_READER_DIR_RELOCATABLE ? " (relocatable)" : "");
|
||
#if HAVE_LIBUNWIND_IA64_H
|
||
fprintf_filtered (stream, _("\
|
||
--with-libunwind-ia64\n\
|
||
"));
|
||
#else
|
||
fprintf_filtered (stream, _("\
|
||
--without-libunwind-ia64\n\
|
||
"));
|
||
#endif
|
||
#if HAVE_LIBLZMA
|
||
fprintf_filtered (stream, _("\
|
||
--with-lzma\n\
|
||
"));
|
||
#else
|
||
fprintf_filtered (stream, _("\
|
||
--without-lzma\n\
|
||
"));
|
||
#endif
|
||
#ifdef WITH_PYTHON_PATH
|
||
fprintf_filtered (stream, _("\
|
||
--with-python=%s%s\n\
|
||
"), WITH_PYTHON_PATH, PYTHON_PATH_RELOCATABLE ? " (relocatable)" : "");
|
||
#endif
|
||
#if HAVE_GUILE
|
||
fprintf_filtered (stream, _("\
|
||
--with-guile\n\
|
||
"));
|
||
#else
|
||
fprintf_filtered (stream, _("\
|
||
--without-guile\n\
|
||
"));
|
||
#endif
|
||
#ifdef RELOC_SRCDIR
|
||
fprintf_filtered (stream, _("\
|
||
--with-relocated-sources=%s\n\
|
||
"), RELOC_SRCDIR);
|
||
#endif
|
||
if (DEBUGDIR[0])
|
||
fprintf_filtered (stream, _("\
|
||
--with-separate-debug-dir=%s%s\n\
|
||
"), DEBUGDIR, DEBUGDIR_RELOCATABLE ? " (relocatable)" : "");
|
||
if (TARGET_SYSTEM_ROOT[0])
|
||
fprintf_filtered (stream, _("\
|
||
--with-sysroot=%s%s\n\
|
||
"), TARGET_SYSTEM_ROOT, TARGET_SYSTEM_ROOT_RELOCATABLE ? " (relocatable)" : "");
|
||
if (SYSTEM_GDBINIT[0])
|
||
fprintf_filtered (stream, _("\
|
||
--with-system-gdbinit=%s%s\n\
|
||
"), SYSTEM_GDBINIT, SYSTEM_GDBINIT_RELOCATABLE ? " (relocatable)" : "");
|
||
#if HAVE_ZLIB_H
|
||
fprintf_filtered (stream, _("\
|
||
--with-zlib\n\
|
||
"));
|
||
#else
|
||
fprintf_filtered (stream, _("\
|
||
--without-zlib\n\
|
||
"));
|
||
#endif
|
||
#if HAVE_LIBBABELTRACE
|
||
fprintf_filtered (stream, _("\
|
||
--with-babeltrace\n\
|
||
"));
|
||
#else
|
||
fprintf_filtered (stream, _("\
|
||
--without-babeltrace\n\
|
||
"));
|
||
#endif
|
||
/* We assume "relocatable" will be printed at least once, thus we always
|
||
print this text. It's a reasonably safe assumption for now. */
|
||
fprintf_filtered (stream, _("\n\
|
||
(\"Relocatable\" means the directory can be moved with the GDB installation\n\
|
||
tree, and GDB will still find it.)\n\
|
||
"));
|
||
}
|
||
|
||
|
||
/* The current top level prompt, settable with "set prompt", and/or
|
||
with the python `gdb.prompt_hook' hook. */
|
||
static char *top_prompt;
|
||
|
||
/* Access method for the GDB prompt string. */
|
||
|
||
char *
|
||
get_prompt (void)
|
||
{
|
||
return top_prompt;
|
||
}
|
||
|
||
/* Set method for the GDB prompt string. */
|
||
|
||
void
|
||
set_prompt (const char *s)
|
||
{
|
||
char *p = xstrdup (s);
|
||
|
||
xfree (top_prompt);
|
||
top_prompt = p;
|
||
}
|
||
|
||
|
||
struct qt_args
|
||
{
|
||
char *args;
|
||
int from_tty;
|
||
};
|
||
|
||
/* Callback for iterate_over_inferiors. Kills or detaches the given
|
||
inferior, depending on how we originally gained control of it. */
|
||
|
||
static int
|
||
kill_or_detach (struct inferior *inf, void *args)
|
||
{
|
||
struct qt_args *qt = args;
|
||
struct thread_info *thread;
|
||
|
||
if (inf->pid == 0)
|
||
return 0;
|
||
|
||
thread = any_thread_of_process (inf->pid);
|
||
if (thread != NULL)
|
||
{
|
||
switch_to_thread (thread->ptid);
|
||
|
||
/* Leave core files alone. */
|
||
if (target_has_execution)
|
||
{
|
||
if (inf->attach_flag)
|
||
target_detach (qt->args, qt->from_tty);
|
||
else
|
||
target_kill ();
|
||
}
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Callback for iterate_over_inferiors. Prints info about what GDB
|
||
will do to each inferior on a "quit". ARG points to a struct
|
||
ui_out where output is to be collected. */
|
||
|
||
static int
|
||
print_inferior_quit_action (struct inferior *inf, void *arg)
|
||
{
|
||
struct ui_file *stb = arg;
|
||
|
||
if (inf->pid == 0)
|
||
return 0;
|
||
|
||
if (inf->attach_flag)
|
||
fprintf_filtered (stb,
|
||
_("\tInferior %d [%s] will be detached.\n"), inf->num,
|
||
target_pid_to_str (pid_to_ptid (inf->pid)));
|
||
else
|
||
fprintf_filtered (stb,
|
||
_("\tInferior %d [%s] will be killed.\n"), inf->num,
|
||
target_pid_to_str (pid_to_ptid (inf->pid)));
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* If necessary, make the user confirm that we should quit. Return
|
||
non-zero if we should quit, zero if we shouldn't. */
|
||
|
||
int
|
||
quit_confirm (void)
|
||
{
|
||
struct ui_file *stb;
|
||
struct cleanup *old_chain;
|
||
char *str;
|
||
int qr;
|
||
|
||
/* Don't even ask if we're only debugging a core file inferior. */
|
||
if (!have_live_inferiors ())
|
||
return 1;
|
||
|
||
/* Build the query string as a single string. */
|
||
stb = mem_fileopen ();
|
||
old_chain = make_cleanup_ui_file_delete (stb);
|
||
|
||
fprintf_filtered (stb, _("A debugging session is active.\n\n"));
|
||
iterate_over_inferiors (print_inferior_quit_action, stb);
|
||
fprintf_filtered (stb, _("\nQuit anyway? "));
|
||
|
||
str = ui_file_xstrdup (stb, NULL);
|
||
make_cleanup (xfree, str);
|
||
|
||
qr = query ("%s", str);
|
||
do_cleanups (old_chain);
|
||
return qr;
|
||
}
|
||
|
||
/* Quit without asking for confirmation. */
|
||
|
||
void
|
||
quit_force (char *args, int from_tty)
|
||
{
|
||
int exit_code = 0;
|
||
struct qt_args qt;
|
||
|
||
/* An optional expression may be used to cause gdb to terminate with the
|
||
value of that expression. */
|
||
if (args)
|
||
{
|
||
struct value *val = parse_and_eval (args);
|
||
|
||
exit_code = (int) value_as_long (val);
|
||
}
|
||
else if (return_child_result)
|
||
exit_code = return_child_result_value;
|
||
|
||
qt.args = args;
|
||
qt.from_tty = from_tty;
|
||
|
||
/* We want to handle any quit errors and exit regardless. */
|
||
|
||
/* Get out of tfind mode, and kill or detach all inferiors. */
|
||
TRY
|
||
{
|
||
disconnect_tracing ();
|
||
iterate_over_inferiors (kill_or_detach, &qt);
|
||
}
|
||
CATCH (ex, RETURN_MASK_ALL)
|
||
{
|
||
exception_print (gdb_stderr, ex);
|
||
}
|
||
END_CATCH
|
||
|
||
/* Give all pushed targets a chance to do minimal cleanup, and pop
|
||
them all out. */
|
||
TRY
|
||
{
|
||
pop_all_targets ();
|
||
}
|
||
CATCH (ex, RETURN_MASK_ALL)
|
||
{
|
||
exception_print (gdb_stderr, ex);
|
||
}
|
||
END_CATCH
|
||
|
||
/* Save the history information if it is appropriate to do so. */
|
||
TRY
|
||
{
|
||
if (write_history_p && history_filename
|
||
&& input_from_terminal_p ())
|
||
gdb_safe_append_history ();
|
||
}
|
||
CATCH (ex, RETURN_MASK_ALL)
|
||
{
|
||
exception_print (gdb_stderr, ex);
|
||
}
|
||
END_CATCH
|
||
|
||
/* Do any final cleanups before exiting. */
|
||
TRY
|
||
{
|
||
do_final_cleanups (all_cleanups ());
|
||
}
|
||
CATCH (ex, RETURN_MASK_ALL)
|
||
{
|
||
exception_print (gdb_stderr, ex);
|
||
}
|
||
END_CATCH
|
||
|
||
exit (exit_code);
|
||
}
|
||
|
||
/* Returns whether GDB is running on a terminal and input is
|
||
currently coming from that terminal. */
|
||
|
||
int
|
||
input_from_terminal_p (void)
|
||
{
|
||
if (batch_flag)
|
||
return 0;
|
||
|
||
if (gdb_has_a_terminal () && instream == stdin)
|
||
return 1;
|
||
|
||
/* If INSTREAM is unset, and we are not in a user command, we
|
||
must be in Insight. That's like having a terminal, for our
|
||
purposes. */
|
||
if (instream == NULL && !in_user_command)
|
||
return 1;
|
||
|
||
return 0;
|
||
}
|
||
|
||
static void
|
||
dont_repeat_command (char *ignored, int from_tty)
|
||
{
|
||
/* Can't call dont_repeat here because we're not necessarily reading
|
||
from stdin. */
|
||
*saved_command_line = 0;
|
||
}
|
||
|
||
/* Functions to manipulate command line editing control variables. */
|
||
|
||
/* Number of commands to print in each call to show_commands. */
|
||
#define Hist_print 10
|
||
void
|
||
show_commands (char *args, int from_tty)
|
||
{
|
||
/* Index for history commands. Relative to history_base. */
|
||
int offset;
|
||
|
||
/* Number of the history entry which we are planning to display next.
|
||
Relative to history_base. */
|
||
static int num = 0;
|
||
|
||
/* Print out some of the commands from the command history. */
|
||
|
||
if (args)
|
||
{
|
||
if (args[0] == '+' && args[1] == '\0')
|
||
/* "info editing +" should print from the stored position. */
|
||
;
|
||
else
|
||
/* "info editing <exp>" should print around command number <exp>. */
|
||
num = (parse_and_eval_long (args) - history_base) - Hist_print / 2;
|
||
}
|
||
/* "show commands" means print the last Hist_print commands. */
|
||
else
|
||
{
|
||
num = history_length - Hist_print;
|
||
}
|
||
|
||
if (num < 0)
|
||
num = 0;
|
||
|
||
/* If there are at least Hist_print commands, we want to display the last
|
||
Hist_print rather than, say, the last 6. */
|
||
if (history_length - num < Hist_print)
|
||
{
|
||
num = history_length - Hist_print;
|
||
if (num < 0)
|
||
num = 0;
|
||
}
|
||
|
||
for (offset = num;
|
||
offset < num + Hist_print && offset < history_length;
|
||
offset++)
|
||
{
|
||
printf_filtered ("%5d %s\n", history_base + offset,
|
||
(history_get (history_base + offset))->line);
|
||
}
|
||
|
||
/* The next command we want to display is the next one that we haven't
|
||
displayed yet. */
|
||
num += Hist_print;
|
||
|
||
/* If the user repeats this command with return, it should do what
|
||
"show commands +" does. This is unnecessary if arg is null,
|
||
because "show commands +" is not useful after "show commands". */
|
||
if (from_tty && args)
|
||
{
|
||
args[0] = '+';
|
||
args[1] = '\0';
|
||
}
|
||
}
|
||
|
||
/* Called by do_setshow_command. */
|
||
static void
|
||
set_history_size_command (char *args, int from_tty, struct cmd_list_element *c)
|
||
{
|
||
/* Readline's history interface works with 'int', so it can only
|
||
handle history sizes up to INT_MAX. The command itself is
|
||
uinteger, so UINT_MAX means "unlimited", but we only get that if
|
||
the user does "set history size 0" -- "set history size <UINT_MAX>"
|
||
throws out-of-range. */
|
||
if (history_size_setshow_var > INT_MAX
|
||
&& history_size_setshow_var != UINT_MAX)
|
||
{
|
||
unsigned int new_value = history_size_setshow_var;
|
||
|
||
/* Restore previous value before throwing. */
|
||
if (history_is_stifled ())
|
||
history_size_setshow_var = history_max_entries;
|
||
else
|
||
history_size_setshow_var = UINT_MAX;
|
||
|
||
error (_("integer %u out of range"), new_value);
|
||
}
|
||
|
||
/* Commit the new value to readline's history. */
|
||
if (history_size_setshow_var == UINT_MAX)
|
||
unstifle_history ();
|
||
else
|
||
stifle_history (history_size_setshow_var);
|
||
}
|
||
|
||
void
|
||
set_history (char *args, int from_tty)
|
||
{
|
||
printf_unfiltered (_("\"set history\" must be followed "
|
||
"by the name of a history subcommand.\n"));
|
||
help_list (sethistlist, "set history ", all_commands, gdb_stdout);
|
||
}
|
||
|
||
void
|
||
show_history (char *args, int from_tty)
|
||
{
|
||
cmd_show_list (showhistlist, from_tty, "");
|
||
}
|
||
|
||
int info_verbose = 0; /* Default verbose msgs off. */
|
||
|
||
/* Called by do_setshow_command. An elaborate joke. */
|
||
void
|
||
set_verbose (char *args, int from_tty, struct cmd_list_element *c)
|
||
{
|
||
const char *cmdname = "verbose";
|
||
struct cmd_list_element *showcmd;
|
||
|
||
showcmd = lookup_cmd_1 (&cmdname, showlist, NULL, 1);
|
||
gdb_assert (showcmd != NULL && showcmd != CMD_LIST_AMBIGUOUS);
|
||
|
||
if (info_verbose)
|
||
{
|
||
c->doc = "Set verbose printing of informational messages.";
|
||
showcmd->doc = "Show verbose printing of informational messages.";
|
||
}
|
||
else
|
||
{
|
||
c->doc = "Set verbosity.";
|
||
showcmd->doc = "Show verbosity.";
|
||
}
|
||
}
|
||
|
||
/* Init the history buffer. Note that we are called after the init file(s)
|
||
have been read so that the user can change the history file via his
|
||
.gdbinit file (for instance). The GDBHISTFILE environment variable
|
||
overrides all of this. */
|
||
|
||
void
|
||
init_history (void)
|
||
{
|
||
char *tmpenv;
|
||
|
||
tmpenv = getenv ("HISTSIZE");
|
||
if (tmpenv)
|
||
{
|
||
int var;
|
||
|
||
var = atoi (tmpenv);
|
||
if (var < 0)
|
||
{
|
||
/* Prefer ending up with no history rather than overflowing
|
||
readline's history interface, which uses signed 'int'
|
||
everywhere. */
|
||
var = 0;
|
||
}
|
||
|
||
history_size_setshow_var = var;
|
||
}
|
||
/* If the init file hasn't set a size yet, pick the default. */
|
||
else if (history_size_setshow_var == 0)
|
||
history_size_setshow_var = 256;
|
||
|
||
/* Note that unlike "set history size 0", "HISTSIZE=0" really sets
|
||
the history size to 0... */
|
||
stifle_history (history_size_setshow_var);
|
||
|
||
tmpenv = getenv ("GDBHISTFILE");
|
||
if (tmpenv)
|
||
history_filename = xstrdup (tmpenv);
|
||
else if (!history_filename)
|
||
{
|
||
/* We include the current directory so that if the user changes
|
||
directories the file written will be the same as the one
|
||
that was read. */
|
||
#ifdef __MSDOS__
|
||
/* No leading dots in file names are allowed on MSDOS. */
|
||
history_filename = concat (current_directory, "/_gdb_history",
|
||
(char *)NULL);
|
||
#else
|
||
history_filename = concat (current_directory, "/.gdb_history",
|
||
(char *)NULL);
|
||
#endif
|
||
}
|
||
read_history (history_filename);
|
||
}
|
||
|
||
static void
|
||
show_prompt (struct ui_file *file, int from_tty,
|
||
struct cmd_list_element *c, const char *value)
|
||
{
|
||
fprintf_filtered (file, _("Gdb's prompt is \"%s\".\n"), value);
|
||
}
|
||
|
||
static void
|
||
show_async_command_editing_p (struct ui_file *file, int from_tty,
|
||
struct cmd_list_element *c, const char *value)
|
||
{
|
||
fprintf_filtered (file, _("Editing of command lines as "
|
||
"they are typed is %s.\n"),
|
||
value);
|
||
}
|
||
|
||
static void
|
||
show_annotation_level (struct ui_file *file, int from_tty,
|
||
struct cmd_list_element *c, const char *value)
|
||
{
|
||
fprintf_filtered (file, _("Annotation_level is %s.\n"), value);
|
||
}
|
||
|
||
static void
|
||
show_exec_done_display_p (struct ui_file *file, int from_tty,
|
||
struct cmd_list_element *c, const char *value)
|
||
{
|
||
fprintf_filtered (file, _("Notification of completion for "
|
||
"asynchronous execution commands is %s.\n"),
|
||
value);
|
||
}
|
||
|
||
/* New values of the "data-directory" parameter are staged here. */
|
||
static char *staged_gdb_datadir;
|
||
|
||
/* "set" command for the gdb_datadir configuration variable. */
|
||
|
||
static void
|
||
set_gdb_datadir (char *args, int from_tty, struct cmd_list_element *c)
|
||
{
|
||
set_gdb_data_directory (staged_gdb_datadir);
|
||
observer_notify_gdb_datadir_changed ();
|
||
}
|
||
|
||
/* "show" command for the gdb_datadir configuration variable. */
|
||
|
||
static void
|
||
show_gdb_datadir (struct ui_file *file, int from_tty,
|
||
struct cmd_list_element *c, const char *value)
|
||
{
|
||
fprintf_filtered (file, _("GDB's data directory is \"%s\".\n"),
|
||
gdb_datadir);
|
||
}
|
||
|
||
static void
|
||
set_history_filename (char *args, int from_tty, struct cmd_list_element *c)
|
||
{
|
||
/* We include the current directory so that if the user changes
|
||
directories the file written will be the same as the one
|
||
that was read. */
|
||
if (!IS_ABSOLUTE_PATH (history_filename))
|
||
history_filename = reconcat (history_filename, current_directory, "/",
|
||
history_filename, (char *) NULL);
|
||
}
|
||
|
||
static void
|
||
init_main (void)
|
||
{
|
||
/* Initialize the prompt to a simple "(gdb) " prompt or to whatever
|
||
the DEFAULT_PROMPT is. */
|
||
set_prompt (DEFAULT_PROMPT);
|
||
|
||
/* Set things up for annotation_level > 1, if the user ever decides
|
||
to use it. */
|
||
async_annotation_suffix = "prompt";
|
||
|
||
/* Set the important stuff up for command editing. */
|
||
command_editing_p = 1;
|
||
history_expansion_p = 0;
|
||
write_history_p = 0;
|
||
|
||
/* Setup important stuff for command line editing. */
|
||
rl_completion_word_break_hook = gdb_completion_word_break_characters;
|
||
rl_completion_entry_function = readline_line_completion_function;
|
||
rl_completer_word_break_characters = default_word_break_characters ();
|
||
rl_completer_quote_characters = get_gdb_completer_quote_characters ();
|
||
rl_completion_display_matches_hook = cli_display_match_list;
|
||
rl_readline_name = "gdb";
|
||
rl_terminal_name = getenv ("TERM");
|
||
|
||
/* The name for this defun comes from Bash, where it originated.
|
||
15 is Control-o, the same binding this function has in Bash. */
|
||
rl_add_defun ("operate-and-get-next", gdb_rl_operate_and_get_next, 15);
|
||
|
||
add_setshow_string_cmd ("prompt", class_support,
|
||
&top_prompt,
|
||
_("Set gdb's prompt"),
|
||
_("Show gdb's prompt"),
|
||
NULL, NULL,
|
||
show_prompt,
|
||
&setlist, &showlist);
|
||
|
||
add_com ("dont-repeat", class_support, dont_repeat_command, _("\
|
||
Don't repeat this command.\nPrimarily \
|
||
used inside of user-defined commands that should not be repeated when\n\
|
||
hitting return."));
|
||
|
||
add_setshow_boolean_cmd ("editing", class_support,
|
||
&async_command_editing_p, _("\
|
||
Set editing of command lines as they are typed."), _("\
|
||
Show editing of command lines as they are typed."), _("\
|
||
Use \"on\" to enable the editing, and \"off\" to disable it.\n\
|
||
Without an argument, command line editing is enabled. To edit, use\n\
|
||
EMACS-like or VI-like commands like control-P or ESC."),
|
||
set_async_editing_command,
|
||
show_async_command_editing_p,
|
||
&setlist, &showlist);
|
||
|
||
add_setshow_boolean_cmd ("save", no_class, &write_history_p, _("\
|
||
Set saving of the history record on exit."), _("\
|
||
Show saving of the history record on exit."), _("\
|
||
Use \"on\" to enable the saving, and \"off\" to disable it.\n\
|
||
Without an argument, saving is enabled."),
|
||
NULL,
|
||
show_write_history_p,
|
||
&sethistlist, &showhistlist);
|
||
|
||
add_setshow_uinteger_cmd ("size", no_class, &history_size_setshow_var, _("\
|
||
Set the size of the command history,"), _("\
|
||
Show the size of the command history,"), _("\
|
||
ie. the number of previous commands to keep a record of.\n\
|
||
If set to \"unlimited\", the number of commands kept in the history\n\
|
||
list is unlimited. This defaults to the value of the environment\n\
|
||
variable \"HISTSIZE\", or to 256 if this variable is not set."),
|
||
set_history_size_command,
|
||
show_history_size,
|
||
&sethistlist, &showhistlist);
|
||
|
||
add_setshow_filename_cmd ("filename", no_class, &history_filename, _("\
|
||
Set the filename in which to record the command history"), _("\
|
||
Show the filename in which to record the command history"), _("\
|
||
(the list of previous commands of which a record is kept)."),
|
||
set_history_filename,
|
||
show_history_filename,
|
||
&sethistlist, &showhistlist);
|
||
|
||
add_setshow_boolean_cmd ("confirm", class_support, &confirm, _("\
|
||
Set whether to confirm potentially dangerous operations."), _("\
|
||
Show whether to confirm potentially dangerous operations."), NULL,
|
||
NULL,
|
||
show_confirm,
|
||
&setlist, &showlist);
|
||
|
||
add_setshow_zinteger_cmd ("annotate", class_obscure, &annotation_level, _("\
|
||
Set annotation_level."), _("\
|
||
Show annotation_level."), _("\
|
||
0 == normal; 1 == fullname (for use when running under emacs)\n\
|
||
2 == output annotated suitably for use by programs that control GDB."),
|
||
NULL,
|
||
show_annotation_level,
|
||
&setlist, &showlist);
|
||
|
||
add_setshow_boolean_cmd ("exec-done-display", class_support,
|
||
&exec_done_display_p, _("\
|
||
Set notification of completion for asynchronous execution commands."), _("\
|
||
Show notification of completion for asynchronous execution commands."), _("\
|
||
Use \"on\" to enable the notification, and \"off\" to disable it."),
|
||
NULL,
|
||
show_exec_done_display_p,
|
||
&setlist, &showlist);
|
||
|
||
add_setshow_filename_cmd ("data-directory", class_maintenance,
|
||
&staged_gdb_datadir, _("Set GDB's data directory."),
|
||
_("Show GDB's data directory."),
|
||
_("\
|
||
When set, GDB uses the specified path to search for data files."),
|
||
set_gdb_datadir, show_gdb_datadir,
|
||
&setlist,
|
||
&showlist);
|
||
}
|
||
|
||
void
|
||
gdb_init (char *argv0)
|
||
{
|
||
if (pre_init_ui_hook)
|
||
pre_init_ui_hook ();
|
||
|
||
/* Run the init function of each source file. */
|
||
|
||
#ifdef __MSDOS__
|
||
/* Make sure we return to the original directory upon exit, come
|
||
what may, since the OS doesn't do that for us. */
|
||
make_final_cleanup (do_chdir_cleanup, xstrdup (current_directory));
|
||
#endif
|
||
|
||
init_cmd_lists (); /* This needs to be done first. */
|
||
initialize_targets (); /* Setup target_terminal macros for utils.c. */
|
||
initialize_utils (); /* Make errors and warnings possible. */
|
||
|
||
/* Here is where we call all the _initialize_foo routines. */
|
||
initialize_all_files ();
|
||
|
||
/* This creates the current_program_space. Do this after all the
|
||
_initialize_foo routines have had a chance to install their
|
||
per-sspace data keys. Also do this before
|
||
initialize_current_architecture is called, because it accesses
|
||
exec_bfd of the current program space. */
|
||
initialize_progspace ();
|
||
initialize_inferiors ();
|
||
initialize_current_architecture ();
|
||
init_cli_cmds();
|
||
init_main (); /* But that omits this file! Do it now. */
|
||
|
||
initialize_stdin_serial ();
|
||
|
||
/* Take a snapshot of our tty state before readline/ncurses have had a chance
|
||
to alter it. */
|
||
set_initial_gdb_ttystate ();
|
||
|
||
async_init_signals ();
|
||
|
||
/* We need a default language for parsing expressions, so simple
|
||
things like "set width 0" won't fail if no language is explicitly
|
||
set in a config file or implicitly set by reading an executable
|
||
during startup. */
|
||
set_language (language_c);
|
||
expected_language = current_language; /* Don't warn about the change. */
|
||
|
||
/* Allow another UI to initialize. If the UI fails to initialize,
|
||
and it wants GDB to revert to the CLI, it should clear
|
||
deprecated_init_ui_hook. */
|
||
if (deprecated_init_ui_hook)
|
||
deprecated_init_ui_hook (argv0);
|
||
|
||
/* Python initialization, for example, can require various commands to be
|
||
installed. For example "info pretty-printer" needs the "info"
|
||
prefix to be installed. Keep things simple and just do final
|
||
script initialization here. */
|
||
finish_ext_lang_initialization ();
|
||
}
|