a8836c9358
Running mi-break.exp with MI on a secondary UI reveals that MI emits
spurious prompts compared MI running as primary UI:
-exec-continue
^running
*running,thread-id="all"
(gdb)
=breakpoint-modified,bkpt={number="9",type="breakpoint",disp="keep",enabled="y",func="callee2",line="39",script={"set $i=0","while $i<10","print $i","set $i=$i+1","end","continue"}}
~"\n"
~"Breakpoint 9, callee2 (intarg=2, strarg=0x400730 \"A string argument.\") at ...src/gdb/testsuite/gdb.mi/basics.c:39\n"
~"39\t callee3 (strarg);\n"
*stopped,reason="breakpoint-hit",disp="keep",bkptno="9",frame={addr="0x00000000004005dd",func="callee2",...
*running,thread-id="all"
>> (gdb)
=breakpoint-modified,bkpt={number="9",...
~"\n"
~"Breakpoint 9, callee2 (intarg=2, strarg=0x400730 \"A string argument.\") at ...src/gdb/testsuite/gdb.mi/basics.c:39\n"
~"39\t callee3 (strarg);\n"
*stopped,reason="breakpoint-hit",disp="keep",bkptno="9",...
*running,thread-id="all"
~"[Inferior 1 (process 12639) exited normally]\n"
=thread-exited,id="1",group-id="i1"
=thread-group-exited,id="i1",exit-code="0"
*stopped,reason="exited-normally"
FAIL: gdb.mi/mi-break.exp: intermediate stop and continue
FAIL: gdb.mi/mi-break.exp: test hitting breakpoint with commands (timeout)
Note the line marked >> above.
The test sets a breakpoint that runs "continue", a foreground command.
When we get to run the "continue", we've already emitted the *stopped
event on the MI UI, and set its prompt state to PROMPT_NEEDED (this is
done from within normal_stop). Since inferior events are always
handled with the main UI as current UI, breakpoint commands always run
with the main UI as current UI too. This means that the "continue"
ends up always disabling the prompt on the main UI, instead of the UI
that had just been done with synchronous execution.
I think we'll want to extend this with a concept of "set of
threads/inferiors a UI/interpreter is blocked waiting on", but I'm
leaving that for a separate series.
gdb/ChangeLog:
2016-06-21 Pedro Alves <palves@redhat.com>
* infcmd.c (prepare_execution_command): Use
all_uis_on_sync_execution_starting.
* infrun.c (all_uis_on_sync_execution_starting): New function.
* infrun.h (all_uis_on_sync_execution_starting): Declare.
246 lines
8.9 KiB
C
246 lines
8.9 KiB
C
/* Copyright (C) 1986-2016 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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#ifndef INFRUN_H
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#define INFRUN_H 1
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#include "symtab.h"
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struct target_waitstatus;
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struct frame_info;
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struct address_space;
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struct return_value_info;
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/* True if we are debugging run control. */
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extern unsigned int debug_infrun;
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/* True if we are debugging displaced stepping. */
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extern int debug_displaced;
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/* Nonzero if we want to give control to the user when we're notified
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of shared library events by the dynamic linker. */
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extern int stop_on_solib_events;
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/* True if execution commands resume all threads of all processes by
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default; otherwise, resume only threads of the current inferior
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process. */
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extern int sched_multi;
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/* When set, stop the 'step' command if we enter a function which has
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no line number information. The normal behavior is that we step
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over such function. */
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extern int step_stop_if_no_debug;
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/* If set, the inferior should be controlled in non-stop mode. In
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this mode, each thread is controlled independently. Execution
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commands apply only to the selected thread by default, and stop
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events stop only the thread that had the event -- the other threads
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are kept running freely. */
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extern int non_stop;
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/* When set (default), the target should attempt to disable the
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operating system's address space randomization feature when
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starting an inferior. */
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extern int disable_randomization;
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/* Returns a unique identifier for the current stop. This can be used
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to tell whether a command has proceeded the inferior past the
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current location. */
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extern ULONGEST get_stop_id (void);
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/* Reverse execution. */
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enum exec_direction_kind
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{
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EXEC_FORWARD,
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EXEC_REVERSE
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};
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/* The current execution direction. */
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extern enum exec_direction_kind execution_direction;
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extern void start_remote (int from_tty);
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/* Clear out all variables saying what to do when inferior is
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continued or stepped. First do this, then set the ones you want,
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then call `proceed'. STEP indicates whether we're preparing for a
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step/stepi command. */
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extern void clear_proceed_status (int step);
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extern void proceed (CORE_ADDR, enum gdb_signal);
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/* The `resume' routine should only be called in special circumstances.
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Normally, use `proceed', which handles a lot of bookkeeping. */
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extern void resume (enum gdb_signal);
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/* Return a ptid representing the set of threads that we will proceed,
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in the perspective of the user/frontend. We may actually resume
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fewer threads at first, e.g., if a thread is stopped at a
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breakpoint that needs stepping-off, but that should not be visible
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to the user/frontend, and neither should the frontend/user be
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allowed to proceed any of the threads that happen to be stopped for
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internal run control handling, if a previous command wanted them
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resumed. */
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extern ptid_t user_visible_resume_ptid (int step);
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extern void wait_for_inferior (void);
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/* Return control to GDB when the inferior stops for real. Print
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appropriate messages, remove breakpoints, give terminal our modes,
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and run the stop hook. Returns true if the stop hook proceeded the
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target, false otherwise. */
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extern int normal_stop (void);
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extern void get_last_target_status (ptid_t *ptid,
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struct target_waitstatus *status);
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extern void set_last_target_status (ptid_t ptid,
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struct target_waitstatus status);
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/* Stop all threads. Only returns after everything is halted. */
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extern void stop_all_threads (void);
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extern void prepare_for_detach (void);
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extern void fetch_inferior_event (void *);
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extern void init_wait_for_inferior (void);
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extern void insert_step_resume_breakpoint_at_sal (struct gdbarch *,
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struct symtab_and_line ,
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struct frame_id);
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/* Returns true if we're trying to step past the instruction at
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ADDRESS in ASPACE. */
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extern int stepping_past_instruction_at (struct address_space *aspace,
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CORE_ADDR address);
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/* Returns true if thread whose thread number is THREAD is stepping
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over a breakpoint. */
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extern int thread_is_stepping_over_breakpoint (int thread);
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/* Returns true if we're trying to step past an instruction that
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triggers a non-steppable watchpoint. */
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extern int stepping_past_nonsteppable_watchpoint (void);
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extern void set_step_info (struct frame_info *frame,
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struct symtab_and_line sal);
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/* Several print_*_reason helper functions to print why the inferior
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has stopped to the passed in UIOUT. */
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/* Signal received, print why the inferior has stopped. */
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extern void print_signal_received_reason (struct ui_out *uiout,
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enum gdb_signal siggnal);
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/* Print why the inferior has stopped. We are done with a
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step/next/si/ni command, print why the inferior has stopped. */
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extern void print_end_stepping_range_reason (struct ui_out *uiout);
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/* The inferior was terminated by a signal, print why it stopped. */
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extern void print_signal_exited_reason (struct ui_out *uiout,
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enum gdb_signal siggnal);
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/* The inferior program is finished, print why it stopped. */
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extern void print_exited_reason (struct ui_out *uiout, int exitstatus);
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/* Reverse execution: target ran out of history info, print why the
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inferior has stopped. */
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extern void print_no_history_reason (struct ui_out *uiout);
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/* Print the result of a function at the end of a 'finish' command.
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RV points at an object representing the captured return value/type
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and its position in the value history. */
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extern void print_return_value (struct ui_out *uiout,
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struct return_value_info *rv);
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/* Print current location without a level number, if we have changed
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functions or hit a breakpoint. Print source line if we have one.
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If the execution command captured a return value, print it. */
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extern void print_stop_event (struct ui_out *uiout);
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/* Pretty print the results of target_wait, for debugging purposes. */
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extern void print_target_wait_results (ptid_t waiton_ptid, ptid_t result_ptid,
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const struct target_waitstatus *ws);
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extern int signal_stop_state (int);
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extern int signal_print_state (int);
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extern int signal_pass_state (int);
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extern int signal_stop_update (int, int);
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extern int signal_print_update (int, int);
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extern int signal_pass_update (int, int);
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extern void update_signals_program_target (void);
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/* Clear the convenience variables associated with the exit of the
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inferior. Currently, those variables are $_exitcode and
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$_exitsignal. */
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extern void clear_exit_convenience_vars (void);
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/* Dump LEN bytes at BUF in hex to FILE, followed by a newline. */
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extern void displaced_step_dump_bytes (struct ui_file *file,
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const gdb_byte *buf, size_t len);
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extern struct displaced_step_closure *get_displaced_step_closure_by_addr
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(CORE_ADDR addr);
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extern void update_observer_mode (void);
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extern void signal_catch_update (const unsigned int *);
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/* In some circumstances we allow a command to specify a numeric
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signal. The idea is to keep these circumstances limited so that
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users (and scripts) develop portable habits. For comparison,
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POSIX.2 `kill' requires that 1,2,3,6,9,14, and 15 work (and using a
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numeric signal at all is obsolescent. We are slightly more lenient
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and allow 1-15 which should match host signal numbers on most
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systems. Use of symbolic signal names is strongly encouraged. */
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enum gdb_signal gdb_signal_from_command (int num);
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/* Enables/disables infrun's async event source in the event loop. */
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extern void infrun_async (int enable);
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/* Call infrun's event handler the next time through the event
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loop. */
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extern void mark_infrun_async_event_handler (void);
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/* The global queue of threads that need to do a step-over operation
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to get past e.g., a breakpoint. */
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extern struct thread_info *step_over_queue_head;
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/* Remove breakpoints if possible (usually that means, if everything
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is stopped). On failure, print a message. */
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extern void maybe_remove_breakpoints (void);
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/* If a UI was in sync execution mode, and now isn't, restore its
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prompt (a synchronous execution command has finished, and we're
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ready for input). */
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extern void all_uis_check_sync_execution_done (void);
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/* If a UI was in sync execution mode, and hasn't displayed the prompt
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yet, re-disable its prompt (a synchronous execution command was
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started or re-started). */
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extern void all_uis_on_sync_execution_starting (void);
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#endif /* INFRUN_H */
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