PR gdb/13860: don't lose '-interpreter-exec console EXECUTION_COMMAND''s output in async mode.
The other part of PR gdb/13860 is about console execution commands in MI getting their output half lost. E.g., take the finish command, executed on a frontend's GDB console: sync: finish &"finish\n" ~"Run till exit from #0 usleep (useconds=10) at ../sysdeps/unix/sysv/linux/usleep.c:27\n" ^running *running,thread-id="1" (gdb) ~"0x00000000004004d7 in foo () at stepinf.c:6\n" ~"6\t usleep (10);\n" ~"Value returned is $1 = 0\n" *stopped,reason="function-finished",frame={addr="0x00000000004004d7",func="foo",args=[],file="stepinf.c",fullname="/home/pedro/gdb/tests/stepinf.c",line="6"},thread-id="1",stopped-threads="all",core="1" async: finish &"finish\n" ~"Run till exit from #0 usleep (useconds=10) at ../sysdeps/unix/sysv/linux/usleep.c:27\n" ^running *running,thread-id="1" (gdb) *stopped,reason="function-finished",frame={addr="0x00000000004004d7",func="foo",args=[],file="stepinf.c",fullname="/home/pedro/gdb/tests/stepinf.c",line="6"},gdb-result-var="$1",return-value="0",thread-id="1",stopped-threads="all",core="0" Note how all the "Value returned" etc. output is missing in async mode. The same happens with e.g., catchpoints: =breakpoint-modified,bkpt={number="1",type="catchpoint",disp="keep",enabled="y",what="22016",times="1"} ~"\nCatchpoint " ~"1 (forked process 22016), 0x0000003791cbd8a6 in __libc_fork () at ../nptl/sysdeps/unix/sysv/linux/fork.c:131\n" ~"131\t pid = ARCH_FORK ();\n" *stopped,reason="fork",disp="keep",bkptno="1",newpid="22016",frame={addr="0x0000003791cbd8a6",func="__libc_fork",args=[],file="../nptl/sysdeps/unix/sysv/linux/fork.c",fullname="/usr/src/debug/glibc-2.14-394-g8f3b1ff/nptl/sysdeps/unix/sysv/linux/fork.c",line="131"},thread-id="1",stopped-threads="all",core="0" where all those ~ lines are missing in async mode, or just the "step" current line indication: s &"s\n" ^running *running,thread-id="all" (gdb) ~"13\t foo ();\n" *stopped,frame={addr="0x00000000004004ef",func="main",args=[{name="argc",value="1"},{name="argv",value="0x7fffffffdd78"}],file="stepinf.c",fullname="/home/pedro/gdb/tests/stepinf.c",line="13"},thread-id="1",stopped-threads="all",core="3" (gdb) Or in the case of the PRs example, the "Stopped due to shared library event" note: start &"start\n" ~"Temporary breakpoint 1 at 0x400608: file ../../../src/gdb/testsuite/gdb.mi/solib-main.c, line 21.\n" =breakpoint-created,bkpt={number="1",type="breakpoint",disp="del",enabled="y",addr="0x0000000000400608",func="main",file="../../../src/gdb/testsuite/gdb.mi/solib-main.c",fullname="/home/pedro/gdb/mygit/src/gdb/testsuite/gdb.mi/solib-main.c",line="21",times="0",original-location="main"} ~"Starting program: /home/pedro/gdb/mygit/build/gdb/testsuite/gdb.mi/solib-main \n" =thread-group-started,id="i1",pid="21990" =thread-created,id="1",group-id="i1" ^running *running,thread-id="all" (gdb) =library-loaded,id="/lib64/ld-linux-x86-64.so.2",target-name="/lib64/ld-linux-x86-64.so.2",host-name="/lib64/ld-linux-x86-64.so.2",symbols-loaded="0",thread-group="i1" ~"Stopped due to shared library event (no libraries added or removed)\n" *stopped,reason="solib-event",thread-id="1",stopped-threads="all",core="3" (gdb) IMO, if you're typing execution commands in a frontend's console, you expect to see their output. Indeed it's what you get in sync mode. I think async mode should do the same. Deciding what to mirror to the console wrt to breakpoints and random stops gets messy real fast. E.g., say "s" trips on a breakpoint. We'd clearly want to mirror the event to the console in this case. But what about more complicated cases like "s&; thread n; s&", and one of those steps spawning a new thread, and that thread hitting a breakpoint? It's impossible in general to track whether the thread had any relation to the commands that had been executed. So I think we should just simplify and always mirror breakpoints and random events to the console. Notes: - mi->out is the same as gdb_stdout when MI is the current interpreter. I think that referring to that directly is cleaner. An earlier revision of this patch made the changes that are now done in mi_on_normal_stop directly in infrun.c:normal_stop, and so not having an obvious place to put the new uiout by then, and not wanting to abuse CLI's uiout, I made a temporary uiout when necessary. - Hopefuly the rest of the patch is more or less obvious given the comments added. Tested on x86_64 Fedora 20, no regressions. 2014-05-21 Pedro Alves <palves@redhat.com> PR gdb/13860 * gdbthread.h (struct thread_control_state): New field `command_interp'. * infrun.c (follow_fork): Copy the new thread control field to the child fork thread. (clear_proceed_status_thread): Clear the new thread control field. (proceed): Set the new thread control field. * interps.h (command_interp): Declare. * interps.c (command_interpreter): New global. (command_interp): New function. (interp_exec): Set `command_interpreter' while here. * cli-out.c (cli_uiout_dtor): New function. (cli_ui_out_impl): Install it. * mi/mi-interp.c: Include cli-out.h. (mi_cmd_interpreter_exec): Add comment. (restore_current_uiout_cleanup): New function. (ui_out_free_cleanup): New function. (mi_on_normal_stop): If finishing an execution command started by a CLI command, or any kind of breakpoint-like event triggered, print the stop event to the output (CLI) stream. * mi/mi-out.c (mi_ui_out_impl): Install NULL `dtor' handler. 2014-05-21 Pedro Alves <palves@redhat.com> PR gdb/13860 * gdb.mi/mi-cli.exp (line_callee4_next_step): New global. (top level): Test that output related to execution commands is sent to the console with CLI commands, but not with MI commands. Test that breakpoint events are always mirrored to the console. Also expect the new source line to be output after a "next" in async mode too. Make it a pass/fail test. * gdb.mi/mi-solib.exp: Test that the CLI solib event note is output. * lib/mi-support.exp (mi_gdb_expect_cli_output): New procedure.
This commit is contained in:
Pedro Alves
parent
5166082f5f
commit
17b2616cba
@ -1,3 +1,27 @@
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2014-05-21 Pedro Alves <palves@redhat.com>
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PR gdb/13860
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* gdbthread.h (struct thread_control_state): New field
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`command_interp'.
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* infrun.c (follow_fork): Copy the new thread control field to the
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child fork thread.
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(clear_proceed_status_thread): Clear the new thread control field.
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(proceed): Set the new thread control field.
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* interps.h (command_interp): Declare.
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* interps.c (command_interpreter): New global.
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(command_interp): New function.
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(interp_exec): Set `command_interpreter' while here.
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* cli-out.c (cli_uiout_dtor): New function.
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(cli_ui_out_impl): Install it.
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* mi/mi-interp.c: Include cli-out.h.
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(mi_cmd_interpreter_exec): Add comment.
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(restore_current_uiout_cleanup): New function.
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(ui_out_free_cleanup): New function.
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(mi_on_normal_stop): If finishing an execution command started by
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a CLI command, or any kind of breakpoint-like event triggered,
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print the stop event to the output (CLI) stream.
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* mi/mi-out.c (mi_ui_out_impl): Install NULL `dtor' handler.
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2014-05-21 Pedro Alves <palves@redhat.com>
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* cli/cli-cmds.c (list_command): Handle the first "list" after the
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@ -40,6 +40,17 @@ static void out_field_fmt (struct ui_out *uiout, int fldno,
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const char *fldname,
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const char *format,...) ATTRIBUTE_PRINTF (4, 5);
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/* The destructor. */
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static void
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cli_uiout_dtor (struct ui_out *ui_out)
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{
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cli_out_data *data = ui_out_data (ui_out);
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VEC_free (ui_filep, data->streams);
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xfree (data);
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}
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/* These are the CLI output functions */
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/* Mark beginning of a table */
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@ -367,7 +378,7 @@ const struct ui_out_impl cli_ui_out_impl =
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cli_wrap_hint,
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cli_flush,
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cli_redirect,
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0,
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cli_uiout_dtor,
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0, /* Does not need MI hacks (i.e. needs CLI hacks). */
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};
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@ -122,6 +122,11 @@ struct thread_control_state
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/* Chain containing status of breakpoint(s) the thread stopped
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at. */
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bpstat stop_bpstat;
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/* The interpreter that issued the execution command. NULL if the
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thread was resumed as a result of a command applied to some other
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thread (e.g., "next" with scheduler-locking off). */
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struct interp *command_interp;
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};
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/* Inferior thread specific part of `struct infcall_suspend_state'.
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14
gdb/infrun.c
14
gdb/infrun.c
@ -428,6 +428,7 @@ follow_fork (void)
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CORE_ADDR step_range_start = 0;
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CORE_ADDR step_range_end = 0;
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struct frame_id step_frame_id = { 0 };
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struct interp *command_interp = NULL;
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if (!non_stop)
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{
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@ -479,6 +480,7 @@ follow_fork (void)
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step_frame_id = tp->control.step_frame_id;
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exception_resume_breakpoint
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= clone_momentary_breakpoint (tp->control.exception_resume_breakpoint);
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command_interp = tp->control.command_interp;
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/* For now, delete the parent's sr breakpoint, otherwise,
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parent/child sr breakpoints are considered duplicates,
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@ -490,6 +492,7 @@ follow_fork (void)
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tp->control.step_range_end = 0;
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tp->control.step_frame_id = null_frame_id;
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delete_exception_resume_breakpoint (tp);
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tp->control.command_interp = NULL;
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}
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parent = inferior_ptid;
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@ -534,6 +537,7 @@ follow_fork (void)
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tp->control.step_frame_id = step_frame_id;
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tp->control.exception_resume_breakpoint
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= exception_resume_breakpoint;
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tp->control.command_interp = command_interp;
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}
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else
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{
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@ -2024,6 +2028,8 @@ clear_proceed_status_thread (struct thread_info *tp)
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tp->control.proceed_to_finish = 0;
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tp->control.command_interp = NULL;
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/* Discard any remaining commands or status from previous stop. */
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bpstat_clear (&tp->control.stop_bpstat);
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}
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@ -2229,6 +2235,14 @@ proceed (CORE_ADDR addr, enum gdb_signal siggnal, int step)
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regcache_write_pc (regcache, addr);
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}
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/* Record the interpreter that issued the execution command that
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caused this thread to resume. If the top level interpreter is
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MI/async, and the execution command was a CLI command
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(next/step/etc.), we'll want to print stop event output to the MI
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console channel (the stepped-to line, etc.), as if the user
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entered the execution command on a real GDB console. */
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inferior_thread ()->control.command_interp = command_interp ();
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if (debug_infrun)
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fprintf_unfiltered (gdb_stdlog,
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"infrun: proceed (addr=%s, signal=%s, step=%d)\n",
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@ -318,6 +318,29 @@ current_interp_display_prompt_p (void)
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data);
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}
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/* The interpreter that is active while `interp_exec' is active, NULL
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at all other times. */
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static struct interp *command_interpreter;
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/* The interpreter that was active when a command was executed.
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Normally that'd always be CURRENT_INTERPRETER, except that MI's
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-interpreter-exec command doesn't actually flip the current
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interpreter when running its sub-command. The
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`command_interpreter' global tracks when interp_exec is called
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(IOW, when -interpreter-exec is called). If that is set, it is
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INTERP in '-interpreter-exec INTERP "CMD"' or in 'interpreter-exec
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INTERP "CMD". Otherwise, interp_exec isn't active, and so the
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interpreter running the command is the current interpreter. */
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struct interp *
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command_interp (void)
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{
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if (command_interpreter != NULL)
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return command_interpreter;
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else
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return current_interpreter;
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}
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/* Run the current command interpreter's main loop. */
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void
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current_interp_command_loop (void)
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@ -351,9 +374,20 @@ interp_set_quiet (struct interp *interp, int quiet)
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struct gdb_exception
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interp_exec (struct interp *interp, const char *command_str)
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{
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struct gdb_exception ex;
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struct interp *save_command_interp;
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gdb_assert (interp->procs->exec_proc != NULL);
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return interp->procs->exec_proc (interp->data, command_str);
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/* See `command_interp' for why we do this. */
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save_command_interp = command_interpreter;
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command_interpreter = interp;
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ex = interp->procs->exec_proc (interp->data, command_str);
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command_interpreter = save_command_interp;
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return ex;
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}
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/* A convenience routine that nulls out all the common command hooks.
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@ -96,6 +96,8 @@ extern int current_interp_set_logging (int start_log, struct ui_file *out,
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extern void *top_level_interpreter_data (void);
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extern struct interp *top_level_interpreter (void);
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extern struct interp *command_interp (void);
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/* True if the current interpreter is in async mode, false if in sync
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mode. If in sync mode, running a synchronous execution command
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(with execute_command, e.g, "next") will not return until the
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@ -37,6 +37,7 @@
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#include "gdb.h"
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#include "objfiles.h"
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#include "tracepoint.h"
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#include "cli-out.h"
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/* These are the interpreter setup, etc. functions for the MI
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interpreter. */
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@ -231,6 +232,10 @@ mi_cmd_interpreter_exec (char *command, char **argv, int argc)
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error (_("-interpreter-exec: could not find interpreter \"%s\""),
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argv[0]);
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/* Note that unlike the CLI version of this command, we don't
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actually set INTERP_TO_USE as the current interpreter, as we
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still want gdb_stdout, etc. to point at MI streams. */
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/* Insert the MI out hooks, making sure to also call the
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interpreter's hooks if it has any. */
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/* KRS: We shouldn't need this... Events should be installed and
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@ -415,6 +420,26 @@ mi_inferior_removed (struct inferior *inf)
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gdb_flush (mi->event_channel);
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}
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/* Cleanup that restores a previous current uiout. */
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static void
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restore_current_uiout_cleanup (void *arg)
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{
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struct ui_out *saved_uiout = arg;
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current_uiout = saved_uiout;
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}
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/* Cleanup that destroys the a ui_out object. */
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static void
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ui_out_free_cleanup (void *arg)
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{
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struct ui_out *uiout = arg;
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ui_out_destroy (uiout);
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}
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static void
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mi_on_normal_stop (struct bpstats *bs, int print_frame)
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{
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@ -445,6 +470,58 @@ mi_on_normal_stop (struct bpstats *bs, int print_frame)
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current_uiout = saved_uiout;
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}
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/* Otherwise, frame information has already been printed by
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normal_stop. */
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else
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{
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/* Breakpoint hits should always be mirrored to the console.
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Deciding what to mirror to the console wrt to breakpoints
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and random stops gets messy real fast. E.g., say "s"
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trips on a breakpoint. We'd clearly want to mirror the
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event to the console in this case. But what about more
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complicated cases like "s&; thread n; s&", and one of
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those steps spawning a new thread, and that thread
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hitting a breakpoint? It's impossible in general to
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track whether the thread had any relation to the commands
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that had been executed. So we just simplify and always
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mirror breakpoints and random events to the console.
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Also, CLI execution commands (-interpreter-exec console
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"next", for example) in async mode have the opposite
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issue as described in the "then" branch above --
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normal_stop has already printed frame information to MI
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uiout, but nothing has printed the same information to
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the CLI channel. We should print the source line to the
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console when stepping or other similar commands, iff the
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step was started by a console command (but not if it was
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started with -exec-step or similar). */
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struct thread_info *tp = inferior_thread ();
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if ((!tp->control.stop_step
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&& !tp->control.proceed_to_finish)
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|| (tp->control.command_interp != NULL
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&& tp->control.command_interp != top_level_interpreter ()))
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{
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struct mi_interp *mi = top_level_interpreter_data ();
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struct target_waitstatus last;
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ptid_t last_ptid;
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struct ui_out *cli_uiout;
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struct cleanup *old_chain;
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/* Sets the current uiout to a new temporary CLI uiout
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assigned to STREAM. */
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cli_uiout = cli_out_new (mi->out);
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old_chain = make_cleanup (ui_out_free_cleanup, cli_uiout);
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make_cleanup (restore_current_uiout_cleanup, current_uiout);
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current_uiout = cli_uiout;
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get_last_target_status (&last_ptid, &last);
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print_stop_event (&last);
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do_cleanups (old_chain);
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}
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}
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ui_out_field_int (mi_uiout, "thread-id",
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pid_to_thread_id (inferior_ptid));
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@ -1,3 +1,16 @@
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2014-05-21 Pedro Alves <palves@redhat.com>
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PR gdb/13860
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* gdb.mi/mi-cli.exp (line_callee4_next_step): New global.
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(top level): Test that output related to execution commands is
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sent to the console with CLI commands, but not with MI commands.
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Test that breakpoint events are always mirrored to the console.
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Also expect the new source line to be output after a "next" in
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async mode too. Make it a pass/fail test.
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* gdb.mi/mi-solib.exp: Test that the CLI solib event note is
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output.
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* lib/mi-support.exp (mi_gdb_expect_cli_output): New procedure.
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2014-05-21 Pedro Alves <palves@redhat.com>
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* gdb.base/list.exp (build_pattern, test_list): New procedures.
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@ -69,6 +69,7 @@ set line_main_callme_2 [expr $line_main_return + 1]
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set line_callee4_head [gdb_get_line_number "callee4 ("]
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set line_callee4_body [expr $line_callee4_head + 2]
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set line_callee4_next [expr $line_callee4_body + 1]
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set line_callee4_next_step [expr $line_callee4_next + 3]
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mi_gdb_test "-interpreter-exec console \"set args foobar\"" \
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".*=cmd-param-changed,param=\"args\",value=\"foobar\".*\\^done" \
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@ -153,13 +154,44 @@ if {$async} {
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mi_execute_to "interpreter-exec console step" $reason "callee4" "" ".*basics.c" $line_callee4_next \
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"" "check *stopped from CLI command"
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mi_send_resuming_command "exec-step" "-exec-step to line \$line_callee4_next_step"
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# Test that the new current source line is _not_ output, given we
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# executed MI's -exec-next, not CLI's 'next' command.
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set output [mi_gdb_expect_cli_output "\\*stopped" "collect CLI output for -exec-step"]
|
||||
|
||||
set test "-exec-step does not produce CLI step output"
|
||||
if {[regexp "A + B" "$output"]} {
|
||||
fail $test
|
||||
} else {
|
||||
pass $test
|
||||
}
|
||||
|
||||
mi_expect_stop "end-stepping-range" "callee4" "" ".*basics.c" $line_callee4_next_step \
|
||||
"" "check *stopped from CLI command 2"
|
||||
|
||||
mi_gdb_test "600-break-insert -t basics.c:$line_main_hello" \
|
||||
{600\^done,bkpt=.number="3",type="breakpoint".*\}} \
|
||||
"-break-insert -t basics.c:\$line_main_hello"
|
||||
|
||||
mi_execute_to "exec-continue" "breakpoint-hit" "main" "" ".*basics.c" \
|
||||
$line_main_hello { "" "disp=\"del\"" } \
|
||||
"-exec-continue to line \$line_main_hello"
|
||||
# Test that breakpoint events are always mirrored to the CLI output
|
||||
# stream (both sync and async modes).
|
||||
mi_send_resuming_command "exec-continue" "-exec-continue to line \$line_main_hello"
|
||||
|
||||
set output [mi_gdb_expect_cli_output "\\*stopped" "collect CLI output for breakpoint hit"]
|
||||
set test "breakpoint hit produces CLI output"
|
||||
set pattern "\\\\nTemporary breakpoint 3, main \\(\\) at \[^\n\]+basics.c:$line_main_hello\\\\n\[^\n\]+Hello"
|
||||
|
||||
if {[regexp $pattern $output]} {
|
||||
pass $test
|
||||
} else {
|
||||
fail $test
|
||||
}
|
||||
|
||||
# Test the MI output.
|
||||
mi_expect_stop "breakpoint-hit" "main" "" ".*basics.c" \
|
||||
$line_main_hello { "" "disp=\"del\"" } "temporary breakpoint output hit in MI"
|
||||
|
||||
# Test that the token is output even for CLI commands
|
||||
# Also test that *stopped includes frame information.
|
||||
@ -167,10 +199,16 @@ mi_gdb_test "34 next" \
|
||||
".*34\\\^running.*\\*running,thread-id=\"all\"" \
|
||||
"34 next: run"
|
||||
|
||||
if {!$async} {
|
||||
gdb_expect {
|
||||
-re "~\[^\r\n\]+\r\n" {
|
||||
}
|
||||
# Test that the new current source line is output to the console
|
||||
# stream, given we executed the console 'next' command, not
|
||||
# -exec-next.
|
||||
set test "34 next: CLI output"
|
||||
gdb_expect {
|
||||
-re "~\"$line_main_return\[^\r\n\]+\r\n" {
|
||||
pass $test
|
||||
}
|
||||
timeout {
|
||||
fail "$test (timeout)"
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
@ -60,4 +60,15 @@ mi_gdb_test "777-gdb-set stop-on-solib-events 1" "777\\^done" \
|
||||
# commands still cause the correct MI output to be generated.
|
||||
mi_run_with_cli
|
||||
|
||||
# Also test that the CLI solib event note is output.
|
||||
set test "CLI prints solib event"
|
||||
gdb_expect {
|
||||
-re "~\"Stopped due to shared library event \\(no libraries added or removed\\)\\\\n" {
|
||||
pass "$test"
|
||||
}
|
||||
timeout {
|
||||
fail "$test (timeout)"
|
||||
}
|
||||
}
|
||||
|
||||
mi_expect_stop solib-event .* .* .* .* .* "check for solib event"
|
||||
|
||||
@ -799,6 +799,30 @@ proc mi_gdb_test { args } {
|
||||
return $result
|
||||
}
|
||||
|
||||
# Collect output sent to the console output stream until UNTIL is
|
||||
# seen. UNTIL is a regular expression. MESSAGE is the message to be
|
||||
# printed in case of timeout.
|
||||
|
||||
proc mi_gdb_expect_cli_output {until message} {
|
||||
|
||||
set output ""
|
||||
gdb_expect {
|
||||
-re "~\"(\[^\r\n\]+)\"\r\n" {
|
||||
append output $expect_out(1,string)
|
||||
exp_continue
|
||||
}
|
||||
-notransfer -re "$until" {
|
||||
# Done
|
||||
}
|
||||
timeout {
|
||||
fail "$message (timeout)"
|
||||
return ""
|
||||
}
|
||||
}
|
||||
|
||||
return $output
|
||||
}
|
||||
|
||||
#
|
||||
# MI run command. (A modified version of gdb_run_cmd)
|
||||
#
|
||||
|
||||
Loading…
Reference in New Issue
Block a user