1999-10-06 01:13:56 +02:00
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/* Handling of inferior events for the event loop for GDB, the GNU debugger.
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2010-01-01 08:32:07 +01:00
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Copyright (C) 1999, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
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1999-10-06 01:13:56 +02:00
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Written by Elena Zannoni <ezannoni@cygnus.com> of Cygnus Solutions.
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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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2007-08-23 20:08:50 +02:00
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the Free Software Foundation; either version 3 of the License, or
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1999-10-06 01:13:56 +02:00
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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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2007-08-23 20:08:50 +02:00
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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1999-10-06 01:13:56 +02:00
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#include "defs.h"
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#include "inferior.h" /* For fetch_inferior_event. */
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#include "target.h" /* For enum inferior_event_type. */
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#include "event-loop.h"
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#include "event-top.h"
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#include "inf-loop.h"
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2008-03-14 16:14:49 +01:00
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#include "remote.h"
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2005-01-12 Andrew Cagney <cagney@gnu.org>
* exceptions.h (enum return_reason, RETURN_MASK)
(RETURN_MASK_QUIT, RETURN_MASK_ERROR, RETURN_MASK_ALL)
(return_mask, throw_exception, catch_exceptions_ftype)
(catch_exceptions_with_msg, catch_errors_ftype, catch_errors)
(catch_command_errors_ftype, catch_command_errors): Move to
exceptions.h.
* exceptions.c, exceptions.h: New files.
* top.c: Do not include <setjmp.h>.
(SIGJMP_BUF, SIGSETJMP, SIGLONGJMP, catch_return)
(throw_exception, catcher, catch_exceptions)
(catch_exceptions_with_msg, struct catch_errors_args)
(do_catch_errors, catch_errors, struct captured_command_args)
(do_captured_command, catch_command_errors): Move to exceptions.c.
* wrapper.c, wince.c, win32-nat.c, utils.c: Include "exceptions.h".
* tui/tui-interp.c, top.c, thread.c, symmisc.c: Ditto.
* symfile-mem.c, stack.c, solib.c, rs6000-nat.c: Ditto.
* remote-sds.c, remote-mips.c, remote-fileio.c: Ditto.
* remote-e7000.c, objc-lang.c, ocd.c: Ditto.
* remote.c, nto-procfs.c, monitor.c, mi/mi-main.c: Ditto.
* main.c, m32r-rom.c, infrun.c, inf-loop.c: Ditto.
* hppa-hpux-tdep.c, frame.c, event-top.c, event-loop.c: Ditto.
* corelow.c, corefile.c, cli/cli-interp.c, breakpoint.c: Ditto.
* ada-valprint.c, ada-lang.c: Ditto.
* Makefile.in (HFILES_NO_SRCDIR, COMMON_OBS): Add exceptions.h and
exceptions.o. Update all dependencies.
2005-01-12 19:31:35 +01:00
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#include "exceptions.h"
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2008-03-14 19:57:44 +01:00
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#include "language.h"
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2008-07-10 00:16:15 +02:00
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#include "gdbthread.h"
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1999-10-06 01:13:56 +02:00
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static int fetch_inferior_event_wrapper (gdb_client_data client_data);
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1999-10-12 06:37:53 +02:00
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void
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inferior_event_handler_wrapper (gdb_client_data client_data)
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{
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inferior_event_handler (INF_QUIT_REQ, client_data);
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}
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1999-10-06 01:13:56 +02:00
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/* General function to handle events in the inferior. So far it just
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takes care of detecting errors reported by select() or poll(),
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otherwise it assumes that all is OK, and goes on reading data from
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the fd. This however may not always be what we want to do. */
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void
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inferior_event_handler (enum inferior_event_type event_type,
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gdb_client_data client_data)
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{
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2008-05-05 11:02:59 +02:00
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struct gdb_exception e;
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2008-03-14 19:57:44 +01:00
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int was_sync = 0;
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2010-05-14 23:25:51 +02:00
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1999-10-06 01:13:56 +02:00
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switch (event_type)
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{
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case INF_ERROR:
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2005-02-11 Andrew Cagney <cagney@gnu.org>
Mark up some of printf_filtered and printf_unfiltered.
* ada-lang.c, annotate.c, arch-utils.c, breakpoint.c: Update.
* corelow.c, cp-namespace.c, cp-support.c, dcache.c: Update.
* demangle.c, dsrec.c, dwarf2read.c, dwarfread.c: Update.
* event-loop.c, event-top.c, exec.c, f-valprint.c: Update.
* gdbtypes.c, inf-loop.c, inf-ptrace.c, inf-ttrace.c: Update.
* infcmd.c, inflow.c, infrun.c, inftarg.c, language.c: Update.
* linespec.c, linux-nat.c, linux-thread-db.c, maint.c: Update.
* mdebugread.c, memattr.c, monitor.c, objc-lang.c: Update.
* ocd.c, osabi.c, printcmd.c, procfs.c, regcache.c: Update.
* remote.c, solib-som.c, solib.c, somsolib.c, source.c: Update.
* stack.c, symfile.c, symmisc.c, target.c, thread.c: Update.
* top.c, utils.c, valprint.c, value.c, cli/cli-cmds.c: Update.
* cli/cli-dump.c, cli/cli-logging.c, tui/tui-hooks.c: Update.
* tui/tui-regs.c, tui/tui-win.c: Update.
2005-02-12 01:39:24 +01:00
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printf_unfiltered (_("error detected from target.\n"));
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2008-11-04 21:52:24 +01:00
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pop_all_targets_above (file_stratum, 0);
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2008-07-12 21:25:42 +02:00
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discard_all_intermediate_continuations ();
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discard_all_continuations ();
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2008-03-14 20:55:51 +01:00
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async_enable_stdin ();
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1999-10-06 01:13:56 +02:00
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break;
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case INF_REG_EVENT:
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/* Use catch errors for now, until the inner layers of
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fetch_inferior_event (i.e. readchar) can return meaningful
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error status. If an error occurs while getting an event from
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the target, just get rid of the target. */
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if (!catch_errors (fetch_inferior_event_wrapper,
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client_data, "", RETURN_MASK_ALL))
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{
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2008-11-04 21:52:24 +01:00
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pop_all_targets_above (file_stratum, 0);
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2008-07-12 21:25:42 +02:00
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discard_all_intermediate_continuations ();
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discard_all_continuations ();
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2008-03-14 20:55:51 +01:00
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async_enable_stdin ();
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1999-10-06 01:13:56 +02:00
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display_gdb_prompt (0);
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}
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break;
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case INF_EXEC_COMPLETE:
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Non-stop inferior control.
* infrun.c (resume): In non-stop mode, always resume just one
thread.
(proceed): Don't call prepare_to_proceed in non-stop mode.
(fetch_inferior_event): In non-stop mode, switch context before
handling the event.
(error_is_running, ensure_not_running): New.
(handle_inferior_event): In non-stop mode: Mark only the event
thread as stopped. Require that the target module manages adding
threads to the thread list. Assert that there isn't a
deferred_step_ptid set. Don't switch to infwait_thread_hop_state.
(normal_stop): Only mark not-running if inferior hasn't exited.
In non-stop mode, only mark the event thread.
* thread.c:Include "cli/cli-decode.h".
(print_thread_info): Don't read from a running thread.
Output "(running)" if thread is running.
(switch_to_thread): Don't read stop_pc if thread is executing.
(do_restore_current_thread_cleanup): Don't write to a running
thread.
(thread_apply_all_command): Don't read from a running thread. In
non-stop mode, do a full context-switch instead of just switching
threads.
(thread_apply_command): In non-stop mode, do a full context-switch
instead of just switching threads.
(do_captured_thread_select): Likewise. Inform user if selected
thread is running.
(_initialize_thread): Mark "info threads" and "thread" and
async_ok.
* inf-loop.c (inferior_event_handler): In non-stop mode, don't
unregister the target from the event loop.
* infcmd.c (continue_command, step_1, jump_command)
(signal_command): Ensure the selected thread isn't running.
(interrupt_target_command): In non-stop mode, interrupt only the
selected thread.
* inferior.h (error_is_running, ensure_not_running): Declare.
* target.h (struct target_ops): Add ptid argument to the to_stop
member.
(target_stop): Add ptid_t argument.
* target.c (update_current_target): Add ptid argument to to_stop's
type.
(debug_to_stop): Add ptid_t argument.
(debug_to_rcmd): Set to_stop_ptid.
* remote.c (remote_stop): Add ptid_t argument.
(async_remote_interrupt): Add inferior_ptid to target_stop.
* inf-ptrace.c (inf_ptrace_stop): Add ptid argument.
* Makefile.in (thread.o): Depend on $(cli_decode_h).
2008-07-10 00:42:43 +02:00
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if (!non_stop)
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{
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/* Unregister the inferior from the event loop. This is done
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so that when the inferior is not running we don't get
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distracted by spurious inferior output. */
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if (target_has_execution)
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target_async (NULL, 0);
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}
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2008-03-14 19:57:44 +01:00
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2008-03-14 20:55:51 +01:00
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/* The call to async_enable_stdin below resets 'sync_execution'.
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However, if sync_execution is 1 now, we also need to show the
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prompt below, so save the current value. */
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2008-03-14 19:57:44 +01:00
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was_sync = sync_execution;
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2008-03-14 20:55:51 +01:00
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async_enable_stdin ();
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2008-03-14 19:57:44 +01:00
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2008-11-05 21:23:07 +01:00
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/* Do all continuations associated with the whole inferior (not
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a particular thread). */
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if (!ptid_equal (inferior_ptid, null_ptid))
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do_all_inferior_continuations ();
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2008-04-17 13:49:56 +02:00
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/* If we were doing a multi-step (eg: step n, next n), but it
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got interrupted by a breakpoint, still do the pending
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continuations. The continuation itself is responsible for
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2008-05-06 20:49:19 +02:00
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distinguishing the cases. The continuations are allowed to
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touch the inferior memory, e.g. to remove breakpoints, so run
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them before running breakpoint commands, which may resume the
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target. */
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Remove global continuations in favour of a per-thread
continuations.
* gdbthread.h (struct thread_info): Add comments around
continuations and intermediate_continuations.
(save_infrun_state, load_infrun_state): Delete continuations and
intermediate_continuations arguments.
* infrun.c (fetch_inferior_event): Only call normal_stop if
stop_soon is NO_STOP_QUIETLY.
(context_switch): Don't context-switch the continuations.
* thread.c (clear_thread_inferior_resources): Discard all
continuations of the thread we're clearing.
(save_infrun_state, load_infrun_state): Delete continuations and
intermediate_continuations arguments, and the code referencing
them.
* utils.c: Include "gdbthread.h".
(cmd_continuation, intermediate_continuation): Delete.
(add_continuation): Add thread_info* argument. Install the
continuation on it.
(restore_thread_cleanup): New.
(do_all_continuations_ptid, do_all_continuations_thread_callback):
New.
(do_all_continuations): Reimplement.
(discard_all_continuations_thread_callback,
discard_all_continuations_thread): New.
(discard_all_continuations): Reimplement.
(add_intermediate_continuation): Add thread_info* argument.
Install the continuation on it.
(do_all_intermediate_continuations_thread_callback)
(do_all_intermediate_continuations_thread): New.
(do_all_intermediate_continuations): Reimplement.
(discard_all_intermediate_continuations_thread_callback): New.
(discard_all_intermediate_continuations_thread): New.
(discard_all_intermediate_continuations): Reimplement.
* breakpoint.c (until_break_command): Install the continuation on
the current thread.
* defs.h (cmd_continuation, intermediate_continuation): Delete.
(struct thread_info): Forward declare.
(add_continuation, add_intermediate_continuation): Add
thread_info* argument.
(do_all_continuations_thread, discard_all_continuations_thread)
(do_all_intermediate_continuations_thread)
(discard_all_intermediate_continuations_thread): Declare.
* inf-loop.c (inferior_event_handler): In non-stop only run
continuations on the thread that stopped. In all-stop, run
continuations on all threads.
* infcmd.c (step_once, finish_command): Adjust.
2008-09-08 23:57:42 +02:00
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if (non_stop
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&& target_has_execution
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&& !ptid_equal (inferior_ptid, null_ptid))
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do_all_intermediate_continuations_thread (inferior_thread ());
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else
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do_all_intermediate_continuations ();
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2008-04-17 13:49:56 +02:00
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2008-05-06 20:49:19 +02:00
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/* Always finish the previous command before running any
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breakpoint commands. Any stop cancels the previous command.
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E.g. a "finish" or "step-n" command interrupted by an
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unrelated breakpoint is canceled. */
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Remove global continuations in favour of a per-thread
continuations.
* gdbthread.h (struct thread_info): Add comments around
continuations and intermediate_continuations.
(save_infrun_state, load_infrun_state): Delete continuations and
intermediate_continuations arguments.
* infrun.c (fetch_inferior_event): Only call normal_stop if
stop_soon is NO_STOP_QUIETLY.
(context_switch): Don't context-switch the continuations.
* thread.c (clear_thread_inferior_resources): Discard all
continuations of the thread we're clearing.
(save_infrun_state, load_infrun_state): Delete continuations and
intermediate_continuations arguments, and the code referencing
them.
* utils.c: Include "gdbthread.h".
(cmd_continuation, intermediate_continuation): Delete.
(add_continuation): Add thread_info* argument. Install the
continuation on it.
(restore_thread_cleanup): New.
(do_all_continuations_ptid, do_all_continuations_thread_callback):
New.
(do_all_continuations): Reimplement.
(discard_all_continuations_thread_callback,
discard_all_continuations_thread): New.
(discard_all_continuations): Reimplement.
(add_intermediate_continuation): Add thread_info* argument.
Install the continuation on it.
(do_all_intermediate_continuations_thread_callback)
(do_all_intermediate_continuations_thread): New.
(do_all_intermediate_continuations): Reimplement.
(discard_all_intermediate_continuations_thread_callback): New.
(discard_all_intermediate_continuations_thread): New.
(discard_all_intermediate_continuations): Reimplement.
* breakpoint.c (until_break_command): Install the continuation on
the current thread.
* defs.h (cmd_continuation, intermediate_continuation): Delete.
(struct thread_info): Forward declare.
(add_continuation, add_intermediate_continuation): Add
thread_info* argument.
(do_all_continuations_thread, discard_all_continuations_thread)
(do_all_intermediate_continuations_thread)
(discard_all_intermediate_continuations_thread): Declare.
* inf-loop.c (inferior_event_handler): In non-stop only run
continuations on the thread that stopped. In all-stop, run
continuations on all threads.
* infcmd.c (step_once, finish_command): Adjust.
2008-09-08 23:57:42 +02:00
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if (non_stop
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&& target_has_execution
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&& !ptid_equal (inferior_ptid, null_ptid))
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do_all_continuations_thread (inferior_thread ());
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else
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do_all_continuations ();
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2008-03-14 19:57:44 +01:00
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2008-05-06 20:49:19 +02:00
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if (current_language != expected_language
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&& language_mode == language_mode_auto)
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language_info (1); /* Print what changed. */
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/* Don't propagate breakpoint commands errors. Either we're
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stopping or some command resumes the inferior. The user will
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be informed. */
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TRY_CATCH (e, RETURN_MASK_ALL)
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2008-03-14 19:57:44 +01:00
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{
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2008-09-08 23:46:21 +02:00
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bpstat_do_actions ();
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2008-03-14 19:57:44 +01:00
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}
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2009-03-28 01:58:31 +01:00
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if (!was_sync
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&& exec_done_display_p
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&& (ptid_equal (inferior_ptid, null_ptid)
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|| !is_running (inferior_ptid)))
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Exited threads.
* thread.c (enum thread_state): New.
(thread_state main_thread_running): Delete, in favor of...
(thread_state main_thread_state): ... this. Update throughout.
(clear_thread_inferior_resources): New, split from free_thread.
(free_thread): Call clear_thread_inferior_resources.
(init_thread_list): Set main thread to stopped state.
(add_thread_silent): Take care of PTID reuses.
(delete_thread): If deleting inferior_ptid or a thread with
refcount > 0, mark it as exited, but still keep it in the list.
Only notify of thread exits, if we haven't done so yet.
(iterate_over_threads): Make it safe to delete threads while
iterating over them.
(do_captured_list_thread_ids): Don't account for exited threads.
(thread_alive): Check for the THREAD_EXITED state, and don't set
ptid to -1 on exited threads.
(set_running): Update to account for extra possible states.
(is_thread_state): New.
(is_stopped, is_exited): New.
(is_running): Implement in terms of is_thread_state.
(any_running): Update.
(print_thread_info): Update. Account for exited threads. Don't
warn about missed frame restoring here, its done in the cleanup.
(switch_to_thread): Don't read from a thread that has gone.
(restore_current_thread): In non-stop mode, do a full context
switch.
(restore_selected_frame): Add a frame_level argument. Rewrite.
(struct current_thread_cleanup): Add selected_frame_level and
was_stopped members.
(do_restore_current_thread_cleanup): Check if thread was stopped
and still is, and if the target has registers, stack and memory
before restoring the selected frame. Don't delete the cleanup
argument here.
(restore_current_thread_cleanup_dtor): New.
(make_cleanup_restore_current_thread): Remove all arguments.
Rewrite.
(thread_apply_all_command): Update. Prune threads.
(thread_apply_command): Update.
(thread_command): Account for currently selected exited thread.
(do_captured_thread_select): Check for a running thread. Prune
threads.
(_initialize_thread): Make "info threads", "thread", "thread
apply", and "thread apply all" appliable without a selected thread.
* gdbthread.h (struct thread_info): Replace running_ by state_.
Add refcount.
(is_exited, is_stopped): Declare.
(make_cleanup_restore_current_thread): Remove all arguments.
* infrun.c: Include "event-top.h".
(fetch_inferior_event): In non-stop mode, restore selected thread
and frame after handling the event and running breakpoint
commands. Display GDB prompt if needed.
(normal_stop): In non-stop mode, don't print thread switching
notice.
* cli/cli-decode.c (set_cmd_no_selected_thread_ok)
(get_cmd_no_selected_thread_ok): New.
* cli/cli-decode.h (CMD_NO_SELECTED_THREAD_OK): New.
(set_cmd_no_selected_thread_ok, get_cmd_no_selected_thread_ok):
Declare.
* cli/cli-cmds.c: Set "pwd", "help", "info", "show" as
no-selected-thread ok.
* top.c (execute_command): Check for non no-selected-thread-ok
commands.
* linux-nat.c (struct saved_ptids, threads_to_delete)
(record_dead_thread, prune_lwps): Delete.
(exit_lwp): Unconditionally delete thread.
(linux_nat_resume): Remove prune_lwps call.
* infcmd.c (proceed_thread_callback): Check if !is_stopped instead
of is_running. Adjust to make_cleanup_restore_current_thread
interface change.
* mi/mi-main.c (mi_cmd_execute): Only allow a few commands if the
selected thread has exited.
* inf-loop.c (inferior_event_handler): Don't display the prompt
here.
* varobj.c (c_value_of_root): Update.
* defs.h (make_cleanup_dtor): Declare.
* utils.c (make_cleanup_dtor): New.
* Makefile.in (infrun.o): Depend on $(event_top_h).
2008-07-11 13:07:39 +02:00
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printf_unfiltered (_("completed.\n"));
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1999-10-06 01:13:56 +02:00
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break;
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|
|
|
1999-12-07 04:56:43 +01:00
|
|
|
case INF_EXEC_CONTINUE:
|
|
|
|
/* Is there anything left to do for the command issued to
|
|
|
|
complete? */
|
Remove global continuations in favour of a per-thread
continuations.
* gdbthread.h (struct thread_info): Add comments around
continuations and intermediate_continuations.
(save_infrun_state, load_infrun_state): Delete continuations and
intermediate_continuations arguments.
* infrun.c (fetch_inferior_event): Only call normal_stop if
stop_soon is NO_STOP_QUIETLY.
(context_switch): Don't context-switch the continuations.
* thread.c (clear_thread_inferior_resources): Discard all
continuations of the thread we're clearing.
(save_infrun_state, load_infrun_state): Delete continuations and
intermediate_continuations arguments, and the code referencing
them.
* utils.c: Include "gdbthread.h".
(cmd_continuation, intermediate_continuation): Delete.
(add_continuation): Add thread_info* argument. Install the
continuation on it.
(restore_thread_cleanup): New.
(do_all_continuations_ptid, do_all_continuations_thread_callback):
New.
(do_all_continuations): Reimplement.
(discard_all_continuations_thread_callback,
discard_all_continuations_thread): New.
(discard_all_continuations): Reimplement.
(add_intermediate_continuation): Add thread_info* argument.
Install the continuation on it.
(do_all_intermediate_continuations_thread_callback)
(do_all_intermediate_continuations_thread): New.
(do_all_intermediate_continuations): Reimplement.
(discard_all_intermediate_continuations_thread_callback): New.
(discard_all_intermediate_continuations_thread): New.
(discard_all_intermediate_continuations): Reimplement.
* breakpoint.c (until_break_command): Install the continuation on
the current thread.
* defs.h (cmd_continuation, intermediate_continuation): Delete.
(struct thread_info): Forward declare.
(add_continuation, add_intermediate_continuation): Add
thread_info* argument.
(do_all_continuations_thread, discard_all_continuations_thread)
(do_all_intermediate_continuations_thread)
(discard_all_intermediate_continuations_thread): Declare.
* inf-loop.c (inferior_event_handler): In non-stop only run
continuations on the thread that stopped. In all-stop, run
continuations on all threads.
* infcmd.c (step_once, finish_command): Adjust.
2008-09-08 23:57:42 +02:00
|
|
|
|
|
|
|
if (non_stop)
|
|
|
|
do_all_intermediate_continuations_thread (inferior_thread ());
|
|
|
|
else
|
|
|
|
do_all_intermediate_continuations ();
|
1999-12-07 04:56:43 +01:00
|
|
|
break;
|
|
|
|
|
2008-03-14 16:14:49 +01:00
|
|
|
case INF_QUIT_REQ:
|
|
|
|
/* FIXME: ezannoni 1999-10-04. This call should really be a
|
|
|
|
target vector entry, so that it can be used for any kind of
|
|
|
|
targets. */
|
|
|
|
async_remote_interrupt_twice (NULL);
|
1999-10-12 06:37:53 +02:00
|
|
|
break;
|
|
|
|
|
1999-10-06 01:13:56 +02:00
|
|
|
case INF_TIMER:
|
|
|
|
default:
|
2005-02-11 Andrew Cagney <cagney@gnu.org>
Mark up some of printf_filtered and printf_unfiltered.
* ada-lang.c, annotate.c, arch-utils.c, breakpoint.c: Update.
* corelow.c, cp-namespace.c, cp-support.c, dcache.c: Update.
* demangle.c, dsrec.c, dwarf2read.c, dwarfread.c: Update.
* event-loop.c, event-top.c, exec.c, f-valprint.c: Update.
* gdbtypes.c, inf-loop.c, inf-ptrace.c, inf-ttrace.c: Update.
* infcmd.c, inflow.c, infrun.c, inftarg.c, language.c: Update.
* linespec.c, linux-nat.c, linux-thread-db.c, maint.c: Update.
* mdebugread.c, memattr.c, monitor.c, objc-lang.c: Update.
* ocd.c, osabi.c, printcmd.c, procfs.c, regcache.c: Update.
* remote.c, solib-som.c, solib.c, somsolib.c, source.c: Update.
* stack.c, symfile.c, symmisc.c, target.c, thread.c: Update.
* top.c, utils.c, valprint.c, value.c, cli/cli-cmds.c: Update.
* cli/cli-dump.c, cli/cli-logging.c, tui/tui-hooks.c: Update.
* tui/tui-regs.c, tui/tui-win.c: Update.
2005-02-12 01:39:24 +01:00
|
|
|
printf_unfiltered (_("Event type not recognized.\n"));
|
1999-10-06 01:13:56 +02:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
fetch_inferior_event_wrapper (gdb_client_data client_data)
|
|
|
|
{
|
|
|
|
fetch_inferior_event (client_data);
|
|
|
|
return 1;
|
|
|
|
}
|