| 1 | /* MI Interpreter Definitions and Commands for GDB, the GNU debugger. |
| 2 | |
| 3 | Copyright (C) 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010 |
| 4 | Free Software Foundation, Inc. |
| 5 | |
| 6 | This file is part of GDB. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 3 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 20 | |
| 21 | #include "defs.h" |
| 22 | #include "gdb_string.h" |
| 23 | #include "interps.h" |
| 24 | #include "event-top.h" |
| 25 | #include "event-loop.h" |
| 26 | #include "inferior.h" |
| 27 | #include "ui-out.h" |
| 28 | #include "top.h" |
| 29 | #include "exceptions.h" |
| 30 | #include "mi-main.h" |
| 31 | #include "mi-cmds.h" |
| 32 | #include "mi-out.h" |
| 33 | #include "mi-console.h" |
| 34 | #include "mi-common.h" |
| 35 | #include "observer.h" |
| 36 | #include "gdbthread.h" |
| 37 | #include "solist.h" |
| 38 | |
| 39 | /* These are the interpreter setup, etc. functions for the MI interpreter */ |
| 40 | static void mi_execute_command_wrapper (char *cmd); |
| 41 | static void mi_command_loop (int mi_version); |
| 42 | |
| 43 | /* These are hooks that we put in place while doing interpreter_exec |
| 44 | so we can report interesting things that happened "behind the mi's |
| 45 | back" in this command */ |
| 46 | static int mi_interp_query_hook (const char *ctlstr, va_list ap) |
| 47 | ATTR_FORMAT (printf, 1, 0); |
| 48 | |
| 49 | static void mi3_command_loop (void); |
| 50 | static void mi2_command_loop (void); |
| 51 | static void mi1_command_loop (void); |
| 52 | |
| 53 | static void mi_insert_notify_hooks (void); |
| 54 | static void mi_remove_notify_hooks (void); |
| 55 | static void mi_on_normal_stop (struct bpstats *bs, int print_frame); |
| 56 | |
| 57 | static void mi_new_thread (struct thread_info *t); |
| 58 | static void mi_thread_exit (struct thread_info *t, int silent); |
| 59 | static void mi_inferior_appeared (int pid); |
| 60 | static void mi_inferior_exit (int pid); |
| 61 | static void mi_on_resume (ptid_t ptid); |
| 62 | static void mi_solib_loaded (struct so_list *solib); |
| 63 | static void mi_solib_unloaded (struct so_list *solib); |
| 64 | static void mi_about_to_proceed (void); |
| 65 | |
| 66 | static void * |
| 67 | mi_interpreter_init (int top_level) |
| 68 | { |
| 69 | struct mi_interp *mi = XMALLOC (struct mi_interp); |
| 70 | |
| 71 | /* HACK: We need to force stdout/stderr to point at the console. This avoids |
| 72 | any potential side effects caused by legacy code that is still |
| 73 | using the TUI / fputs_unfiltered_hook. So we set up output channels for |
| 74 | this now, and swap them in when we are run. */ |
| 75 | |
| 76 | raw_stdout = stdio_fileopen (stdout); |
| 77 | |
| 78 | /* Create MI channels */ |
| 79 | mi->out = mi_console_file_new (raw_stdout, "~", '"'); |
| 80 | mi->err = mi_console_file_new (raw_stdout, "&", '"'); |
| 81 | mi->log = mi->err; |
| 82 | mi->targ = mi_console_file_new (raw_stdout, "@", '"'); |
| 83 | mi->event_channel = mi_console_file_new (raw_stdout, "=", 0); |
| 84 | |
| 85 | if (top_level) |
| 86 | { |
| 87 | observer_attach_new_thread (mi_new_thread); |
| 88 | observer_attach_thread_exit (mi_thread_exit); |
| 89 | observer_attach_inferior_appeared (mi_inferior_appeared); |
| 90 | observer_attach_inferior_exit (mi_inferior_exit); |
| 91 | observer_attach_normal_stop (mi_on_normal_stop); |
| 92 | observer_attach_target_resumed (mi_on_resume); |
| 93 | observer_attach_solib_loaded (mi_solib_loaded); |
| 94 | observer_attach_solib_unloaded (mi_solib_unloaded); |
| 95 | observer_attach_about_to_proceed (mi_about_to_proceed); |
| 96 | } |
| 97 | |
| 98 | return mi; |
| 99 | } |
| 100 | |
| 101 | static int |
| 102 | mi_interpreter_resume (void *data) |
| 103 | { |
| 104 | struct mi_interp *mi = data; |
| 105 | /* As per hack note in mi_interpreter_init, swap in the output channels... */ |
| 106 | |
| 107 | gdb_setup_readline (); |
| 108 | |
| 109 | /* These overwrite some of the initialization done in |
| 110 | _intialize_event_loop. */ |
| 111 | call_readline = gdb_readline2; |
| 112 | input_handler = mi_execute_command_wrapper; |
| 113 | add_file_handler (input_fd, stdin_event_handler, 0); |
| 114 | async_command_editing_p = 0; |
| 115 | /* FIXME: This is a total hack for now. PB's use of the MI |
| 116 | implicitly relies on a bug in the async support which allows |
| 117 | asynchronous commands to leak through the commmand loop. The bug |
| 118 | involves (but is not limited to) the fact that sync_execution was |
| 119 | erroneously initialized to 0. Duplicate by initializing it thus |
| 120 | here... */ |
| 121 | sync_execution = 0; |
| 122 | |
| 123 | gdb_stdout = mi->out; |
| 124 | /* Route error and log output through the MI */ |
| 125 | gdb_stderr = mi->err; |
| 126 | gdb_stdlog = mi->log; |
| 127 | /* Route target output through the MI. */ |
| 128 | gdb_stdtarg = mi->targ; |
| 129 | /* Route target error through the MI as well. */ |
| 130 | gdb_stdtargerr = mi->targ; |
| 131 | |
| 132 | /* Replace all the hooks that we know about. There really needs to |
| 133 | be a better way of doing this... */ |
| 134 | clear_interpreter_hooks (); |
| 135 | |
| 136 | deprecated_show_load_progress = mi_load_progress; |
| 137 | |
| 138 | /* If we're _the_ interpreter, take control. */ |
| 139 | if (current_interp_named_p (INTERP_MI1)) |
| 140 | deprecated_command_loop_hook = mi1_command_loop; |
| 141 | else if (current_interp_named_p (INTERP_MI2)) |
| 142 | deprecated_command_loop_hook = mi2_command_loop; |
| 143 | else if (current_interp_named_p (INTERP_MI3)) |
| 144 | deprecated_command_loop_hook = mi3_command_loop; |
| 145 | else |
| 146 | deprecated_command_loop_hook = mi2_command_loop; |
| 147 | |
| 148 | return 1; |
| 149 | } |
| 150 | |
| 151 | static int |
| 152 | mi_interpreter_suspend (void *data) |
| 153 | { |
| 154 | gdb_disable_readline (); |
| 155 | return 1; |
| 156 | } |
| 157 | |
| 158 | static struct gdb_exception |
| 159 | mi_interpreter_exec (void *data, const char *command) |
| 160 | { |
| 161 | static struct gdb_exception ok; |
| 162 | char *tmp = alloca (strlen (command) + 1); |
| 163 | strcpy (tmp, command); |
| 164 | mi_execute_command_wrapper (tmp); |
| 165 | return exception_none; |
| 166 | } |
| 167 | |
| 168 | /* Never display the default gdb prompt in mi case. */ |
| 169 | static int |
| 170 | mi_interpreter_prompt_p (void *data) |
| 171 | { |
| 172 | return 0; |
| 173 | } |
| 174 | |
| 175 | void |
| 176 | mi_cmd_interpreter_exec (char *command, char **argv, int argc) |
| 177 | { |
| 178 | struct interp *interp_to_use; |
| 179 | int i; |
| 180 | struct interp_procs *procs; |
| 181 | char *mi_error_message = NULL; |
| 182 | struct cleanup *old_chain; |
| 183 | |
| 184 | if (argc < 2) |
| 185 | error ("mi_cmd_interpreter_exec: Usage: -interpreter-exec interp command"); |
| 186 | |
| 187 | interp_to_use = interp_lookup (argv[0]); |
| 188 | if (interp_to_use == NULL) |
| 189 | error ("mi_cmd_interpreter_exec: could not find interpreter \"%s\"", argv[0]); |
| 190 | |
| 191 | if (!interp_exec_p (interp_to_use)) |
| 192 | error ("mi_cmd_interpreter_exec: interpreter \"%s\" does not support command execution", |
| 193 | argv[0]); |
| 194 | |
| 195 | /* Insert the MI out hooks, making sure to also call the interpreter's hooks |
| 196 | if it has any. */ |
| 197 | /* KRS: We shouldn't need this... Events should be installed and they should |
| 198 | just ALWAYS fire something out down the MI channel... */ |
| 199 | mi_insert_notify_hooks (); |
| 200 | |
| 201 | /* Now run the code... */ |
| 202 | |
| 203 | old_chain = make_cleanup (null_cleanup, 0); |
| 204 | for (i = 1; i < argc; i++) |
| 205 | { |
| 206 | struct gdb_exception e = interp_exec (interp_to_use, argv[i]); |
| 207 | if (e.reason < 0) |
| 208 | { |
| 209 | mi_error_message = xstrdup (e.message); |
| 210 | make_cleanup (xfree, mi_error_message); |
| 211 | break; |
| 212 | } |
| 213 | } |
| 214 | |
| 215 | mi_remove_notify_hooks (); |
| 216 | |
| 217 | if (mi_error_message != NULL) |
| 218 | error ("%s", mi_error_message); |
| 219 | do_cleanups (old_chain); |
| 220 | } |
| 221 | |
| 222 | /* |
| 223 | * mi_insert_notify_hooks - This inserts a number of hooks that are meant to produce |
| 224 | * async-notify ("=") MI messages while running commands in another interpreter |
| 225 | * using mi_interpreter_exec. The canonical use for this is to allow access to |
| 226 | * the gdb CLI interpreter from within the MI, while still producing MI style output |
| 227 | * when actions in the CLI command change gdb's state. |
| 228 | */ |
| 229 | |
| 230 | static void |
| 231 | mi_insert_notify_hooks (void) |
| 232 | { |
| 233 | deprecated_query_hook = mi_interp_query_hook; |
| 234 | } |
| 235 | |
| 236 | static void |
| 237 | mi_remove_notify_hooks (void) |
| 238 | { |
| 239 | deprecated_query_hook = NULL; |
| 240 | } |
| 241 | |
| 242 | static int |
| 243 | mi_interp_query_hook (const char *ctlstr, va_list ap) |
| 244 | { |
| 245 | return 1; |
| 246 | } |
| 247 | |
| 248 | static void |
| 249 | mi_execute_command_wrapper (char *cmd) |
| 250 | { |
| 251 | mi_execute_command (cmd, stdin == instream); |
| 252 | } |
| 253 | |
| 254 | static void |
| 255 | mi1_command_loop (void) |
| 256 | { |
| 257 | mi_command_loop (1); |
| 258 | } |
| 259 | |
| 260 | static void |
| 261 | mi2_command_loop (void) |
| 262 | { |
| 263 | mi_command_loop (2); |
| 264 | } |
| 265 | |
| 266 | static void |
| 267 | mi3_command_loop (void) |
| 268 | { |
| 269 | mi_command_loop (3); |
| 270 | } |
| 271 | |
| 272 | static void |
| 273 | mi_command_loop (int mi_version) |
| 274 | { |
| 275 | /* Turn off 8 bit strings in quoted output. Any character with the |
| 276 | high bit set is printed using C's octal format. */ |
| 277 | sevenbit_strings = 1; |
| 278 | /* Tell the world that we're alive */ |
| 279 | fputs_unfiltered ("(gdb) \n", raw_stdout); |
| 280 | gdb_flush (raw_stdout); |
| 281 | start_event_loop (); |
| 282 | } |
| 283 | |
| 284 | static void |
| 285 | mi_new_thread (struct thread_info *t) |
| 286 | { |
| 287 | struct mi_interp *mi = top_level_interpreter_data (); |
| 288 | |
| 289 | fprintf_unfiltered (mi->event_channel, |
| 290 | "thread-created,id=\"%d\",group-id=\"%d\"", |
| 291 | t->num, t->ptid.pid); |
| 292 | gdb_flush (mi->event_channel); |
| 293 | } |
| 294 | |
| 295 | static void |
| 296 | mi_thread_exit (struct thread_info *t, int silent) |
| 297 | { |
| 298 | struct mi_interp *mi; |
| 299 | |
| 300 | if (silent) |
| 301 | return; |
| 302 | |
| 303 | mi = top_level_interpreter_data (); |
| 304 | target_terminal_ours (); |
| 305 | fprintf_unfiltered (mi->event_channel, |
| 306 | "thread-exited,id=\"%d\",group-id=\"%d\"", |
| 307 | t->num,t->ptid.pid); |
| 308 | gdb_flush (mi->event_channel); |
| 309 | } |
| 310 | |
| 311 | void |
| 312 | mi_inferior_appeared (int pid) |
| 313 | { |
| 314 | struct mi_interp *mi = top_level_interpreter_data (); |
| 315 | target_terminal_ours (); |
| 316 | fprintf_unfiltered (mi->event_channel, "thread-group-created,id=\"%d\"", |
| 317 | pid); |
| 318 | gdb_flush (mi->event_channel); |
| 319 | } |
| 320 | |
| 321 | static void |
| 322 | mi_inferior_exit (int pid) |
| 323 | { |
| 324 | struct mi_interp *mi = top_level_interpreter_data (); |
| 325 | target_terminal_ours (); |
| 326 | fprintf_unfiltered (mi->event_channel, "thread-group-exited,id=\"%d\"", |
| 327 | pid); |
| 328 | gdb_flush (mi->event_channel); |
| 329 | } |
| 330 | |
| 331 | static void |
| 332 | mi_on_normal_stop (struct bpstats *bs, int print_frame) |
| 333 | { |
| 334 | /* Since this can be called when CLI command is executing, |
| 335 | using cli interpreter, be sure to use MI uiout for output, |
| 336 | not the current one. */ |
| 337 | struct ui_out *mi_uiout = interp_ui_out (top_level_interpreter ()); |
| 338 | struct mi_interp *mi = top_level_interpreter_data (); |
| 339 | |
| 340 | if (print_frame) |
| 341 | { |
| 342 | if (uiout != mi_uiout) |
| 343 | { |
| 344 | /* The normal_stop function has printed frame information into |
| 345 | CLI uiout, or some other non-MI uiout. There's no way we |
| 346 | can extract proper fields from random uiout object, so we print |
| 347 | the frame again. In practice, this can only happen when running |
| 348 | a CLI command in MI. */ |
| 349 | struct ui_out *saved_uiout = uiout; |
| 350 | uiout = mi_uiout; |
| 351 | print_stack_frame (get_selected_frame (NULL), 0, SRC_AND_LOC); |
| 352 | uiout = saved_uiout; |
| 353 | } |
| 354 | |
| 355 | ui_out_field_int (mi_uiout, "thread-id", |
| 356 | pid_to_thread_id (inferior_ptid)); |
| 357 | if (non_stop) |
| 358 | { |
| 359 | struct cleanup *back_to = make_cleanup_ui_out_list_begin_end |
| 360 | (mi_uiout, "stopped-threads"); |
| 361 | ui_out_field_int (mi_uiout, NULL, |
| 362 | pid_to_thread_id (inferior_ptid)); |
| 363 | do_cleanups (back_to); |
| 364 | } |
| 365 | else |
| 366 | ui_out_field_string (mi_uiout, "stopped-threads", "all"); |
| 367 | } |
| 368 | |
| 369 | fputs_unfiltered ("*stopped", raw_stdout); |
| 370 | mi_out_put (mi_uiout, raw_stdout); |
| 371 | mi_out_rewind (mi_uiout); |
| 372 | mi_print_timing_maybe (); |
| 373 | fputs_unfiltered ("\n", raw_stdout); |
| 374 | gdb_flush (raw_stdout); |
| 375 | } |
| 376 | |
| 377 | static void |
| 378 | mi_about_to_proceed (void) |
| 379 | { |
| 380 | /* Suppress output while calling an inferior function. */ |
| 381 | |
| 382 | if (!ptid_equal (inferior_ptid, null_ptid)) |
| 383 | { |
| 384 | struct thread_info *tp = inferior_thread (); |
| 385 | if (tp->in_infcall) |
| 386 | return; |
| 387 | } |
| 388 | |
| 389 | mi_proceeded = 1; |
| 390 | } |
| 391 | |
| 392 | static int |
| 393 | mi_output_running_pid (struct thread_info *info, void *arg) |
| 394 | { |
| 395 | ptid_t *ptid = arg; |
| 396 | |
| 397 | if (ptid_get_pid (*ptid) == ptid_get_pid (info->ptid)) |
| 398 | fprintf_unfiltered (raw_stdout, |
| 399 | "*running,thread-id=\"%d\"\n", |
| 400 | info->num); |
| 401 | |
| 402 | return 0; |
| 403 | } |
| 404 | |
| 405 | static int |
| 406 | mi_inferior_count (struct inferior *inf, void *arg) |
| 407 | { |
| 408 | if (inf->pid != 0) |
| 409 | { |
| 410 | int *count_p = arg; |
| 411 | (*count_p)++; |
| 412 | } |
| 413 | |
| 414 | return 0; |
| 415 | } |
| 416 | |
| 417 | static void |
| 418 | mi_on_resume (ptid_t ptid) |
| 419 | { |
| 420 | struct thread_info *tp = NULL; |
| 421 | |
| 422 | if (ptid_equal (ptid, minus_one_ptid) || ptid_is_pid (ptid)) |
| 423 | tp = inferior_thread (); |
| 424 | else |
| 425 | tp = find_thread_ptid (ptid); |
| 426 | |
| 427 | /* Suppress output while calling an inferior function. */ |
| 428 | if (tp->in_infcall) |
| 429 | return; |
| 430 | |
| 431 | /* To cater for older frontends, emit ^running, but do it only once |
| 432 | per each command. We do it here, since at this point we know |
| 433 | that the target was successfully resumed, and in non-async mode, |
| 434 | we won't return back to MI interpreter code until the target |
| 435 | is done running, so delaying the output of "^running" until then |
| 436 | will make it impossible for frontend to know what's going on. |
| 437 | |
| 438 | In future (MI3), we'll be outputting "^done" here. */ |
| 439 | if (!running_result_record_printed && mi_proceeded) |
| 440 | { |
| 441 | fprintf_unfiltered (raw_stdout, "%s^running\n", |
| 442 | current_token ? current_token : ""); |
| 443 | } |
| 444 | |
| 445 | if (PIDGET (ptid) == -1) |
| 446 | fprintf_unfiltered (raw_stdout, "*running,thread-id=\"all\"\n"); |
| 447 | else if (ptid_is_pid (ptid)) |
| 448 | { |
| 449 | int count = 0; |
| 450 | |
| 451 | /* Backwards compatibility. If there's only one inferior, |
| 452 | output "all", otherwise, output each resumed thread |
| 453 | individually. */ |
| 454 | iterate_over_inferiors (mi_inferior_count, &count); |
| 455 | |
| 456 | if (count == 1) |
| 457 | fprintf_unfiltered (raw_stdout, "*running,thread-id=\"all\"\n"); |
| 458 | else |
| 459 | iterate_over_threads (mi_output_running_pid, &ptid); |
| 460 | } |
| 461 | else |
| 462 | { |
| 463 | struct thread_info *ti = find_thread_ptid (ptid); |
| 464 | gdb_assert (ti); |
| 465 | fprintf_unfiltered (raw_stdout, "*running,thread-id=\"%d\"\n", ti->num); |
| 466 | } |
| 467 | |
| 468 | if (!running_result_record_printed && mi_proceeded) |
| 469 | { |
| 470 | running_result_record_printed = 1; |
| 471 | /* This is what gdb used to do historically -- printing prompt even if |
| 472 | it cannot actually accept any input. This will be surely removed |
| 473 | for MI3, and may be removed even earler. */ |
| 474 | /* FIXME: review the use of target_is_async_p here -- is that |
| 475 | what we want? */ |
| 476 | if (!target_is_async_p ()) |
| 477 | fputs_unfiltered ("(gdb) \n", raw_stdout); |
| 478 | } |
| 479 | gdb_flush (raw_stdout); |
| 480 | } |
| 481 | |
| 482 | static void |
| 483 | mi_solib_loaded (struct so_list *solib) |
| 484 | { |
| 485 | struct mi_interp *mi = top_level_interpreter_data (); |
| 486 | target_terminal_ours (); |
| 487 | fprintf_unfiltered (mi->event_channel, |
| 488 | "library-loaded,id=\"%s\",target-name=\"%s\",host-name=\"%s\",symbols-loaded=\"%d\"", |
| 489 | solib->so_original_name, solib->so_original_name, |
| 490 | solib->so_name, solib->symbols_loaded); |
| 491 | gdb_flush (mi->event_channel); |
| 492 | } |
| 493 | |
| 494 | static void |
| 495 | mi_solib_unloaded (struct so_list *solib) |
| 496 | { |
| 497 | struct mi_interp *mi = top_level_interpreter_data (); |
| 498 | target_terminal_ours (); |
| 499 | fprintf_unfiltered (mi->event_channel, |
| 500 | "library-unloaded,id=\"%s\",target-name=\"%s\",host-name=\"%s\"", |
| 501 | solib->so_original_name, solib->so_original_name, |
| 502 | solib->so_name); |
| 503 | gdb_flush (mi->event_channel); |
| 504 | } |
| 505 | |
| 506 | |
| 507 | extern initialize_file_ftype _initialize_mi_interp; /* -Wmissing-prototypes */ |
| 508 | |
| 509 | void |
| 510 | _initialize_mi_interp (void) |
| 511 | { |
| 512 | static const struct interp_procs procs = |
| 513 | { |
| 514 | mi_interpreter_init, /* init_proc */ |
| 515 | mi_interpreter_resume, /* resume_proc */ |
| 516 | mi_interpreter_suspend, /* suspend_proc */ |
| 517 | mi_interpreter_exec, /* exec_proc */ |
| 518 | mi_interpreter_prompt_p /* prompt_proc_p */ |
| 519 | }; |
| 520 | |
| 521 | /* The various interpreter levels. */ |
| 522 | interp_add (interp_new (INTERP_MI1, NULL, mi_out_new (1), &procs)); |
| 523 | interp_add (interp_new (INTERP_MI2, NULL, mi_out_new (2), &procs)); |
| 524 | interp_add (interp_new (INTERP_MI3, NULL, mi_out_new (3), &procs)); |
| 525 | |
| 526 | /* "mi" selects the most recent released version. "mi2" was |
| 527 | released as part of GDB 6.0. */ |
| 528 | interp_add (interp_new (INTERP_MI, NULL, mi_out_new (2), &procs)); |
| 529 | } |