1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826
|
/* gdb commands implemented in Python
Copyright (C) 2008-2015 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "arch-utils.h"
#include "value.h"
#include "python-internal.h"
#include "charset.h"
#include "gdbcmd.h"
#include "cli/cli-decode.h"
#include "completer.h"
#include "language.h"
/* Struct representing built-in completion types. */
struct cmdpy_completer
{
/* Python symbol name.
This isn't a const char * for Python 2.4's sake.
PyModule_AddIntConstant only takes a char *, sigh. */
char *name;
/* Completion function. */
completer_ftype *completer;
};
static const struct cmdpy_completer completers[] =
{
{ "COMPLETE_NONE", noop_completer },
{ "COMPLETE_FILENAME", filename_completer },
{ "COMPLETE_LOCATION", location_completer },
{ "COMPLETE_COMMAND", command_completer },
{ "COMPLETE_SYMBOL", make_symbol_completion_list_fn },
{ "COMPLETE_EXPRESSION", expression_completer },
};
#define N_COMPLETERS (sizeof (completers) / sizeof (completers[0]))
/* A gdb command. For the time being only ordinary commands (not
set/show commands) are allowed. */
struct cmdpy_object
{
PyObject_HEAD
/* The corresponding gdb command object, or NULL if the command is
no longer installed. */
struct cmd_list_element *command;
/* A prefix command requires storage for a list of its sub-commands.
A pointer to this is passed to add_prefix_command, and to add_cmd
for sub-commands of that prefix. If this Command is not a prefix
command, then this field is unused. */
struct cmd_list_element *sub_list;
};
typedef struct cmdpy_object cmdpy_object;
extern PyTypeObject cmdpy_object_type
CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF ("cmdpy_object");
/* Constants used by this module. */
static PyObject *invoke_cst;
static PyObject *complete_cst;
/* Python function which wraps dont_repeat. */
static PyObject *
cmdpy_dont_repeat (PyObject *self, PyObject *args)
{
dont_repeat ();
Py_RETURN_NONE;
}
/* Called if the gdb cmd_list_element is destroyed. */
static void
cmdpy_destroyer (struct cmd_list_element *self, void *context)
{
cmdpy_object *cmd;
struct cleanup *cleanup;
cleanup = ensure_python_env (get_current_arch (), current_language);
/* Release our hold on the command object. */
cmd = (cmdpy_object *) context;
cmd->command = NULL;
Py_DECREF (cmd);
/* We allocated the name, doc string, and perhaps the prefix
name. */
xfree ((char *) self->name);
xfree ((char *) self->doc);
xfree ((char *) self->prefixname);
do_cleanups (cleanup);
}
/* Called by gdb to invoke the command. */
static void
cmdpy_function (struct cmd_list_element *command, char *args, int from_tty)
{
cmdpy_object *obj = (cmdpy_object *) get_cmd_context (command);
PyObject *argobj, *ttyobj, *result;
struct cleanup *cleanup;
cleanup = ensure_python_env (get_current_arch (), current_language);
if (! obj)
error (_("Invalid invocation of Python command object."));
if (! PyObject_HasAttr ((PyObject *) obj, invoke_cst))
{
if (obj->command->prefixname)
{
/* A prefix command does not need an invoke method. */
do_cleanups (cleanup);
return;
}
error (_("Python command object missing 'invoke' method."));
}
if (! args)
args = "";
argobj = PyUnicode_Decode (args, strlen (args), host_charset (), NULL);
if (! argobj)
{
gdbpy_print_stack ();
error (_("Could not convert arguments to Python string."));
}
ttyobj = from_tty ? Py_True : Py_False;
Py_INCREF (ttyobj);
result = PyObject_CallMethodObjArgs ((PyObject *) obj, invoke_cst, argobj,
ttyobj, NULL);
Py_DECREF (argobj);
Py_DECREF (ttyobj);
if (! result)
{
PyObject *ptype, *pvalue, *ptraceback;
char *msg;
PyErr_Fetch (&ptype, &pvalue, &ptraceback);
/* Try to fetch an error message contained within ptype, pvalue.
When fetching the error message we need to make our own copy,
we no longer own ptype, pvalue after the call to PyErr_Restore. */
msg = gdbpy_exception_to_string (ptype, pvalue);
make_cleanup (xfree, msg);
if (msg == NULL)
{
/* An error occurred computing the string representation of the
error message. This is rare, but we should inform the user. */
printf_filtered (_("An error occurred in a Python command\n"
"and then another occurred computing the "
"error message.\n"));
gdbpy_print_stack ();
}
/* Don't print the stack for gdb.GdbError exceptions.
It is generally used to flag user errors.
We also don't want to print "Error occurred in Python command"
for user errors. However, a missing message for gdb.GdbError
exceptions is arguably a bug, so we flag it as such. */
if (! PyErr_GivenExceptionMatches (ptype, gdbpy_gdberror_exc)
|| msg == NULL || *msg == '\0')
{
PyErr_Restore (ptype, pvalue, ptraceback);
gdbpy_print_stack ();
if (msg != NULL && *msg != '\0')
error (_("Error occurred in Python command: %s"), msg);
else
error (_("Error occurred in Python command."));
}
else
{
Py_XDECREF (ptype);
Py_XDECREF (pvalue);
Py_XDECREF (ptraceback);
error ("%s", msg);
}
}
Py_DECREF (result);
do_cleanups (cleanup);
}
/* Helper function for the Python command completers (both "pure"
completer and brkchar handler). This function takes COMMAND, TEXT
and WORD and tries to call the Python method for completion with
these arguments.
This function is usually called twice: once when we are figuring out
the break characters to be used, and another to perform the real
completion itself. The reason for this two step dance is that we
need to know the set of "brkchars" to use early on, before we
actually try to perform the completion. But if a Python command
supplies a "complete" method then we have to call that method
first: it may return as its result the kind of completion to
perform and that will in turn specify which brkchars to use. IOW,
we need the result of the "complete" method before we actually
perform the completion. The only situation when this function is
not called twice is when the user uses the "complete" command: in
this scenario, there is no call to determine the "brkchars".
Ideally, it would be nice to cache the result of the first call (to
determine the "brkchars") and return this value directly in the
second call (to perform the actual completion). However, due to
the peculiarity of the "complete" command mentioned above, it is
possible to put GDB in a bad state if you perform a TAB-completion
and then a "complete"-completion sequentially. Therefore, we just
recalculate everything twice for TAB-completions.
This function returns the PyObject representing the Python method
call. */
static PyObject *
cmdpy_completer_helper (struct cmd_list_element *command,
const char *text, const char *word)
{
cmdpy_object *obj = (cmdpy_object *) get_cmd_context (command);
PyObject *textobj, *wordobj;
PyObject *resultobj;
if (obj == NULL)
error (_("Invalid invocation of Python command object."));
if (!PyObject_HasAttr ((PyObject *) obj, complete_cst))
{
/* If there is no complete method, don't error. */
return NULL;
}
textobj = PyUnicode_Decode (text, strlen (text), host_charset (), NULL);
if (textobj == NULL)
error (_("Could not convert argument to Python string."));
wordobj = PyUnicode_Decode (word, strlen (word), host_charset (), NULL);
if (wordobj == NULL)
{
Py_DECREF (textobj);
error (_("Could not convert argument to Python string."));
}
resultobj = PyObject_CallMethodObjArgs ((PyObject *) obj, complete_cst,
textobj, wordobj, NULL);
Py_DECREF (textobj);
Py_DECREF (wordobj);
if (!resultobj)
{
/* Just swallow errors here. */
PyErr_Clear ();
}
Py_XINCREF (resultobj);
return resultobj;
}
/* Python function called to determine the break characters of a
certain completer. We are only interested in knowing if the
completer registered by the user will return one of the integer
codes (see COMPLETER_* symbols). */
static void
cmdpy_completer_handle_brkchars (struct cmd_list_element *command,
const char *text, const char *word)
{
PyObject *resultobj = NULL;
struct cleanup *cleanup;
cleanup = ensure_python_env (get_current_arch (), current_language);
/* Calling our helper to obtain the PyObject of the Python
function. */
resultobj = cmdpy_completer_helper (command, text, word);
/* Check if there was an error. */
if (resultobj == NULL)
goto done;
if (PyInt_Check (resultobj))
{
/* User code may also return one of the completion constants,
thus requesting that sort of completion. We are only
interested in this kind of return. */
long value;
if (!gdb_py_int_as_long (resultobj, &value))
{
/* Ignore. */
PyErr_Clear ();
}
else if (value >= 0 && value < (long) N_COMPLETERS)
{
/* This is the core of this function. Depending on which
completer type the Python function returns, we have to
adjust the break characters accordingly. */
set_gdb_completion_word_break_characters
(completers[value].completer);
}
}
done:
Py_XDECREF (resultobj);
do_cleanups (cleanup);
}
/* Called by gdb for command completion. */
static VEC (char_ptr) *
cmdpy_completer (struct cmd_list_element *command,
const char *text, const char *word)
{
PyObject *resultobj = NULL;
VEC (char_ptr) *result = NULL;
struct cleanup *cleanup;
cleanup = ensure_python_env (get_current_arch (), current_language);
/* Calling our helper to obtain the PyObject of the Python
function. */
resultobj = cmdpy_completer_helper (command, text, word);
/* If the result object of calling the Python function is NULL, it
means that there was an error. In this case, just give up and
return NULL. */
if (resultobj == NULL)
goto done;
result = NULL;
if (PyInt_Check (resultobj))
{
/* User code may also return one of the completion constants,
thus requesting that sort of completion. */
long value;
if (! gdb_py_int_as_long (resultobj, &value))
{
/* Ignore. */
PyErr_Clear ();
}
else if (value >= 0 && value < (long) N_COMPLETERS)
result = completers[value].completer (command, text, word);
}
else
{
PyObject *iter = PyObject_GetIter (resultobj);
PyObject *elt;
if (iter == NULL)
goto done;
while ((elt = PyIter_Next (iter)) != NULL)
{
char *item;
if (! gdbpy_is_string (elt))
{
/* Skip problem elements. */
Py_DECREF (elt);
continue;
}
item = python_string_to_host_string (elt);
Py_DECREF (elt);
if (item == NULL)
{
/* Skip problem elements. */
PyErr_Clear ();
continue;
}
VEC_safe_push (char_ptr, result, item);
}
Py_DECREF (iter);
/* If we got some results, ignore problems. Otherwise, report
the problem. */
if (result != NULL && PyErr_Occurred ())
PyErr_Clear ();
}
done:
Py_XDECREF (resultobj);
do_cleanups (cleanup);
return result;
}
/* Helper for cmdpy_init which locates the command list to use and
pulls out the command name.
NAME is the command name list. The final word in the list is the
name of the new command. All earlier words must be existing prefix
commands.
*BASE_LIST is set to the final prefix command's list of
*sub-commands.
START_LIST is the list in which the search starts.
This function returns the xmalloc()d name of the new command. On
error sets the Python error and returns NULL. */
char *
gdbpy_parse_command_name (const char *name,
struct cmd_list_element ***base_list,
struct cmd_list_element **start_list)
{
struct cmd_list_element *elt;
int len = strlen (name);
int i, lastchar;
char *prefix_text;
const char *prefix_text2;
char *result;
/* Skip trailing whitespace. */
for (i = len - 1; i >= 0 && (name[i] == ' ' || name[i] == '\t'); --i)
;
if (i < 0)
{
PyErr_SetString (PyExc_RuntimeError, _("No command name found."));
return NULL;
}
lastchar = i;
/* Find first character of the final word. */
for (; i > 0 && (isalnum (name[i - 1])
|| name[i - 1] == '-'
|| name[i - 1] == '_');
--i)
;
result = (char *) xmalloc (lastchar - i + 2);
memcpy (result, &name[i], lastchar - i + 1);
result[lastchar - i + 1] = '\0';
/* Skip whitespace again. */
for (--i; i >= 0 && (name[i] == ' ' || name[i] == '\t'); --i)
;
if (i < 0)
{
*base_list = start_list;
return result;
}
prefix_text = (char *) xmalloc (i + 2);
memcpy (prefix_text, name, i + 1);
prefix_text[i + 1] = '\0';
prefix_text2 = prefix_text;
elt = lookup_cmd_1 (&prefix_text2, *start_list, NULL, 1);
if (elt == NULL || elt == CMD_LIST_AMBIGUOUS)
{
PyErr_Format (PyExc_RuntimeError, _("Could not find command prefix %s."),
prefix_text);
xfree (prefix_text);
xfree (result);
return NULL;
}
if (elt->prefixlist)
{
xfree (prefix_text);
*base_list = elt->prefixlist;
return result;
}
PyErr_Format (PyExc_RuntimeError, _("'%s' is not a prefix command."),
prefix_text);
xfree (prefix_text);
xfree (result);
return NULL;
}
/* Object initializer; sets up gdb-side structures for command.
Use: __init__(NAME, COMMAND_CLASS [, COMPLETER_CLASS][, PREFIX]]).
NAME is the name of the command. It may consist of multiple words,
in which case the final word is the name of the new command, and
earlier words must be prefix commands.
COMMAND_CLASS is the kind of command. It should be one of the COMMAND_*
constants defined in the gdb module.
COMPLETER_CLASS is the kind of completer. If not given, the
"complete" method will be used. Otherwise, it should be one of the
COMPLETE_* constants defined in the gdb module.
If PREFIX is True, then this command is a prefix command.
The documentation for the command is taken from the doc string for
the python class. */
static int
cmdpy_init (PyObject *self, PyObject *args, PyObject *kw)
{
cmdpy_object *obj = (cmdpy_object *) self;
const char *name;
int cmdtype;
int completetype = -1;
char *docstring = NULL;
struct cmd_list_element **cmd_list;
char *cmd_name, *pfx_name;
static char *keywords[] = { "name", "command_class", "completer_class",
"prefix", NULL };
PyObject *is_prefix = NULL;
int cmp;
if (obj->command)
{
/* Note: this is apparently not documented in Python. We return
0 for success, -1 for failure. */
PyErr_Format (PyExc_RuntimeError,
_("Command object already initialized."));
return -1;
}
if (! PyArg_ParseTupleAndKeywords (args, kw, "si|iO",
keywords, &name, &cmdtype,
&completetype, &is_prefix))
return -1;
if (cmdtype != no_class && cmdtype != class_run
&& cmdtype != class_vars && cmdtype != class_stack
&& cmdtype != class_files && cmdtype != class_support
&& cmdtype != class_info && cmdtype != class_breakpoint
&& cmdtype != class_trace && cmdtype != class_obscure
&& cmdtype != class_maintenance && cmdtype != class_user)
{
PyErr_Format (PyExc_RuntimeError, _("Invalid command class argument."));
return -1;
}
if (completetype < -1 || completetype >= (int) N_COMPLETERS)
{
PyErr_Format (PyExc_RuntimeError,
_("Invalid completion type argument."));
return -1;
}
cmd_name = gdbpy_parse_command_name (name, &cmd_list, &cmdlist);
if (! cmd_name)
return -1;
pfx_name = NULL;
if (is_prefix != NULL)
{
cmp = PyObject_IsTrue (is_prefix);
if (cmp == 1)
{
int i, out;
/* Make a normalized form of the command name. */
pfx_name = (char *) xmalloc (strlen (name) + 2);
i = 0;
out = 0;
while (name[i])
{
/* Skip whitespace. */
while (name[i] == ' ' || name[i] == '\t')
++i;
/* Copy non-whitespace characters. */
while (name[i] && name[i] != ' ' && name[i] != '\t')
pfx_name[out++] = name[i++];
/* Add a single space after each word -- including the final
word. */
pfx_name[out++] = ' ';
}
pfx_name[out] = '\0';
}
else if (cmp < 0)
{
xfree (cmd_name);
return -1;
}
}
if (PyObject_HasAttr (self, gdbpy_doc_cst))
{
PyObject *ds_obj = PyObject_GetAttr (self, gdbpy_doc_cst);
if (ds_obj && gdbpy_is_string (ds_obj))
{
docstring = python_string_to_host_string (ds_obj);
if (docstring == NULL)
{
xfree (cmd_name);
xfree (pfx_name);
Py_DECREF (ds_obj);
return -1;
}
}
Py_XDECREF (ds_obj);
}
if (! docstring)
docstring = xstrdup (_("This command is not documented."));
Py_INCREF (self);
TRY
{
struct cmd_list_element *cmd;
if (pfx_name)
{
int allow_unknown;
/* If we have our own "invoke" method, then allow unknown
sub-commands. */
allow_unknown = PyObject_HasAttr (self, invoke_cst);
cmd = add_prefix_cmd (cmd_name, (enum command_class) cmdtype,
NULL, docstring, &obj->sub_list,
pfx_name, allow_unknown, cmd_list);
}
else
cmd = add_cmd (cmd_name, (enum command_class) cmdtype, NULL,
docstring, cmd_list);
/* There appears to be no API to set this. */
cmd->func = cmdpy_function;
cmd->destroyer = cmdpy_destroyer;
obj->command = cmd;
set_cmd_context (cmd, self);
set_cmd_completer (cmd, ((completetype == -1) ? cmdpy_completer
: completers[completetype].completer));
if (completetype == -1)
set_cmd_completer_handle_brkchars (cmd,
cmdpy_completer_handle_brkchars);
}
CATCH (except, RETURN_MASK_ALL)
{
xfree (cmd_name);
xfree (docstring);
xfree (pfx_name);
Py_DECREF (self);
PyErr_Format (except.reason == RETURN_QUIT
? PyExc_KeyboardInterrupt : PyExc_RuntimeError,
"%s", except.message);
return -1;
}
END_CATCH
return 0;
}
/* Initialize the 'commands' code. */
int
gdbpy_initialize_commands (void)
{
int i;
cmdpy_object_type.tp_new = PyType_GenericNew;
if (PyType_Ready (&cmdpy_object_type) < 0)
return -1;
/* Note: alias and user are special; pseudo appears to be unused,
and there is no reason to expose tui, I think. */
if (PyModule_AddIntConstant (gdb_module, "COMMAND_NONE", no_class) < 0
|| PyModule_AddIntConstant (gdb_module, "COMMAND_RUNNING", class_run) < 0
|| PyModule_AddIntConstant (gdb_module, "COMMAND_DATA", class_vars) < 0
|| PyModule_AddIntConstant (gdb_module, "COMMAND_STACK", class_stack) < 0
|| PyModule_AddIntConstant (gdb_module, "COMMAND_FILES", class_files) < 0
|| PyModule_AddIntConstant (gdb_module, "COMMAND_SUPPORT",
class_support) < 0
|| PyModule_AddIntConstant (gdb_module, "COMMAND_STATUS", class_info) < 0
|| PyModule_AddIntConstant (gdb_module, "COMMAND_BREAKPOINTS",
class_breakpoint) < 0
|| PyModule_AddIntConstant (gdb_module, "COMMAND_TRACEPOINTS",
class_trace) < 0
|| PyModule_AddIntConstant (gdb_module, "COMMAND_OBSCURE",
class_obscure) < 0
|| PyModule_AddIntConstant (gdb_module, "COMMAND_MAINTENANCE",
class_maintenance) < 0
|| PyModule_AddIntConstant (gdb_module, "COMMAND_USER", class_user) < 0)
return -1;
for (i = 0; i < N_COMPLETERS; ++i)
{
if (PyModule_AddIntConstant (gdb_module, completers[i].name, i) < 0)
return -1;
}
if (gdb_pymodule_addobject (gdb_module, "Command",
(PyObject *) &cmdpy_object_type) < 0)
return -1;
invoke_cst = PyString_FromString ("invoke");
if (invoke_cst == NULL)
return -1;
complete_cst = PyString_FromString ("complete");
if (complete_cst == NULL)
return -1;
return 0;
}
static PyMethodDef cmdpy_object_methods[] =
{
{ "dont_repeat", cmdpy_dont_repeat, METH_NOARGS,
"Prevent command repetition when user enters empty line." },
{ 0 }
};
PyTypeObject cmdpy_object_type =
{
PyVarObject_HEAD_INIT (NULL, 0)
"gdb.Command", /*tp_name*/
sizeof (cmdpy_object), /*tp_basicsize*/
0, /*tp_itemsize*/
0, /*tp_dealloc*/
0, /*tp_print*/
0, /*tp_getattr*/
0, /*tp_setattr*/
0, /*tp_compare*/
0, /*tp_repr*/
0, /*tp_as_number*/
0, /*tp_as_sequence*/
0, /*tp_as_mapping*/
0, /*tp_hash */
0, /*tp_call*/
0, /*tp_str*/
0, /*tp_getattro*/
0, /*tp_setattro*/
0, /*tp_as_buffer*/
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /*tp_flags*/
"GDB command object", /* tp_doc */
0, /* tp_traverse */
0, /* tp_clear */
0, /* tp_richcompare */
0, /* tp_weaklistoffset */
0, /* tp_iter */
0, /* tp_iternext */
cmdpy_object_methods, /* tp_methods */
0, /* tp_members */
0, /* tp_getset */
0, /* tp_base */
0, /* tp_dict */
0, /* tp_descr_get */
0, /* tp_descr_set */
0, /* tp_dictoffset */
cmdpy_init, /* tp_init */
0, /* tp_alloc */
};
/* Utility to build a buildargv-like result from ARGS.
This intentionally parses arguments the way libiberty/argv.c:buildargv
does. It splits up arguments in a reasonable way, and we want a standard
way of parsing arguments. Several gdb commands use buildargv to parse their
arguments. Plus we want to be able to write compatible python
implementations of gdb commands. */
PyObject *
gdbpy_string_to_argv (PyObject *self, PyObject *args)
{
PyObject *py_argv;
const char *input;
if (!PyArg_ParseTuple (args, "s", &input))
return NULL;
py_argv = PyList_New (0);
if (py_argv == NULL)
return NULL;
/* buildargv uses NULL to represent an empty argument list, but we can't use
that in Python. Instead, if ARGS is "" then return an empty list.
This undoes the NULL -> "" conversion that cmdpy_function does. */
if (*input != '\0')
{
char **c_argv = gdb_buildargv (input);
int i;
for (i = 0; c_argv[i] != NULL; ++i)
{
PyObject *argp = PyString_FromString (c_argv[i]);
if (argp == NULL
|| PyList_Append (py_argv, argp) < 0)
{
Py_XDECREF (argp);
Py_DECREF (py_argv);
freeargv (c_argv);
return NULL;
}
Py_DECREF (argp);
}
freeargv (c_argv);
}
return py_argv;
}
|