gdb/python/py-record-btrace.c

   1 /* Python interface to btrace instruction history.
   2
   3    Copyright 2016-2018 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include "defs.h"
  21 #include "gdbcore.h"
  22 #include "gdbcmd.h"
  23 #include "gdbthread.h"
  24 #include "btrace.h"
  25 #include "py-record.h"
  26 #include "py-record-btrace.h"
  27 #include "record-btrace.h"
  28 #include "disasm.h"
  29
  30 #if defined (IS_PY3K)
  31
  32 #define BTPY_PYSLICE(x) (x)
  33
  34 #else
  35
  36 #define BTPY_PYSLICE(x) ((PySliceObject *) x)
  37
  38 #endif
  39
  40 /* Python object for btrace record lists.  */
  41
  42 typedef struct {
  43   PyObject_HEAD
  44
  45   /* The thread this list belongs to.  */
  46   thread_info *thread;
  47
  48   /* The first index being part of this list.  */
  49   Py_ssize_t first;
  50
  51   /* The last index begin part of this list.  */
  52   Py_ssize_t last;
  53
  54   /* Stride size.  */
  55   Py_ssize_t step;
  56
  57   /* Either &BTPY_CALL_TYPE or &RECPY_INSN_TYPE.  */
  58   PyTypeObject* element_type;
  59 } btpy_list_object;
  60
  61 /* Python type for btrace lists.  */
  62
  63 static PyTypeObject btpy_list_type = {
  64   PyVarObject_HEAD_INIT (NULL, 0)
  65 };
  66
  67 /* Returns either a btrace_insn for the given Python gdb.RecordInstruction
  68    object or sets an appropriate Python exception and returns NULL.  */
  69
  70 static const btrace_insn *
  71 btrace_insn_from_recpy_insn (const PyObject * const pyobject)
  72 {
  73   const btrace_insn *insn;
  74   const recpy_element_object *obj;
  75   thread_info *tinfo;
  76   btrace_insn_iterator iter;
  77
  78   if (Py_TYPE (pyobject) != &recpy_insn_type)
  79     {
  80       PyErr_Format (gdbpy_gdb_error, _("Must be gdb.RecordInstruction"));
  81       return NULL;
  82     }
  83
  84   obj = (const recpy_element_object *) pyobject;
  85   tinfo = obj->thread;
  86
  87   if (tinfo == NULL || btrace_is_empty (tinfo))
  88     {
  89       PyErr_Format (gdbpy_gdb_error, _("No such instruction."));
  90       return NULL;
  91     }
  92
  93   if (btrace_find_insn_by_number (&iter, &tinfo->btrace, obj->number) == 0)
  94     {
  95       PyErr_Format (gdbpy_gdb_error, _("No such instruction."));
  96       return NULL;
  97     }
  98
  99   insn = btrace_insn_get (&iter);
 100   if (insn == NULL)
 101     {
 102       PyErr_Format (gdbpy_gdb_error, _("Not a valid instruction."));
 103       return NULL;
 104     }
 105
 106   return insn;
 107 }
 108
 109 /* Returns either a btrace_function for the given Python
 110    gdb.RecordFunctionSegment object or sets an appropriate Python exception and
 111    returns NULL.  */
 112
 113 static const btrace_function *
 114 btrace_func_from_recpy_func (const PyObject * const pyobject)
 115 {
 116   const btrace_function *func;
 117   const recpy_element_object *obj;
 118   thread_info *tinfo;
 119   btrace_call_iterator iter;
 120
 121   if (Py_TYPE (pyobject) != &recpy_func_type)
 122     {
 123       PyErr_Format (gdbpy_gdb_error, _("Must be gdb.RecordFunctionSegment"));
 124       return NULL;
 125     }
 126
 127   obj = (const recpy_element_object *) pyobject;
 128   tinfo = obj->thread;
 129
 130   if (tinfo == NULL || btrace_is_empty (tinfo))
 131     {
 132       PyErr_Format (gdbpy_gdb_error, _("No such function segment."));
 133       return NULL;
 134     }
 135
 136   if (btrace_find_call_by_number (&iter, &tinfo->btrace, obj->number) == 0)
 137     {
 138       PyErr_Format (gdbpy_gdb_error, _("No such function segment."));
 139       return NULL;
 140     }
 141
 142   func = btrace_call_get (&iter);
 143   if (func == NULL)
 144     {
 145       PyErr_Format (gdbpy_gdb_error, _("Not a valid function segment."));
 146       return NULL;
 147     }
 148
 149   return func;
 150 }
 151
 152 /* Looks at the recorded item with the number NUMBER and create a
 153    gdb.RecordInstruction or gdb.RecordGap object for it accordingly.  */
 154
 155 static PyObject *
 156 btpy_insn_or_gap_new (thread_info *tinfo, Py_ssize_t number)
 157 {
 158   btrace_insn_iterator iter;
 159   int err_code;
 160
 161   btrace_find_insn_by_number (&iter, &tinfo->btrace, number);
 162   err_code = btrace_insn_get_error (&iter);
 163
 164   if (err_code != 0)
 165     {
 166       const btrace_config *config;
 167       const char *err_string;
 168
 169       config = btrace_conf (&tinfo->btrace);
 170       err_string = btrace_decode_error (config->format, err_code);
 171
 172       return recpy_gap_new (err_code, err_string, number);
 173     }
 174
 175   return recpy_insn_new (tinfo, RECORD_METHOD_BTRACE, number);
 176 }
 177
 178 /* Create a new gdb.BtraceList object.  */
 179
 180 static PyObject *
 181 btpy_list_new (thread_info *thread, Py_ssize_t first, Py_ssize_t last, Py_ssize_t step,
 182                PyTypeObject *element_type)
 183 {
 184   btpy_list_object * const obj = PyObject_New (btpy_list_object,
 185                                                &btpy_list_type);
 186
 187   if (obj == NULL)
 188     return NULL;
 189
 190   obj->thread = thread;
 191   obj->first = first;
 192   obj->last = last;
 193   obj->step = step;
 194   obj->element_type = element_type;
 195
 196   return (PyObject *) obj;
 197 }
 198
 199 /* Implementation of RecordInstruction.sal [gdb.Symtab_and_line] for btrace.
 200    Returns the SAL associated with this instruction.  */
 201
 202 PyObject *
 203 recpy_bt_insn_sal (PyObject *self, void *closure)
 204 {
 205   const btrace_insn * const insn = btrace_insn_from_recpy_insn (self);
 206   PyObject *result = NULL;
 207
 208   if (insn == NULL)
 209     return NULL;
 210
 211   TRY
 212     {
 213       result = symtab_and_line_to_sal_object (find_pc_line (insn->pc, 0));
 214     }
 215   CATCH (except, RETURN_MASK_ALL)
 216     {
 217       GDB_PY_HANDLE_EXCEPTION (except);
 218     }
 219   END_CATCH
 220
 221   return result;
 222 }
 223
 224 /* Implementation of RecordInstruction.pc [int] for btrace.
 225    Returns the instruction address.  */
 226
 227 PyObject *
 228 recpy_bt_insn_pc (PyObject *self, void *closure)
 229 {
 230   const btrace_insn * const insn = btrace_insn_from_recpy_insn (self);
 231
 232   if (insn == NULL)
 233     return NULL;
 234
 235   return gdb_py_long_from_ulongest (insn->pc);
 236 }
 237
 238 /* Implementation of RecordInstruction.size [int] for btrace.
 239    Returns the instruction size.  */
 240
 241 PyObject *
 242 recpy_bt_insn_size (PyObject *self, void *closure)
 243 {
 244   const btrace_insn * const insn = btrace_insn_from_recpy_insn (self);
 245
 246   if (insn == NULL)
 247     return NULL;
 248
 249   return PyInt_FromLong (insn->size);
 250 }
 251
 252 /* Implementation of RecordInstruction.is_speculative [bool] for btrace.
 253    Returns if this instruction was executed speculatively.  */
 254
 255 PyObject *
 256 recpy_bt_insn_is_speculative (PyObject *self, void *closure)
 257 {
 258   const btrace_insn * const insn = btrace_insn_from_recpy_insn (self);
 259
 260   if (insn == NULL)
 261     return NULL;
 262
 263   if (insn->flags & BTRACE_INSN_FLAG_SPECULATIVE)
 264     Py_RETURN_TRUE;
 265   else
 266     Py_RETURN_FALSE;
 267 }
 268
 269 /* Implementation of RecordInstruction.data [buffer] for btrace.
 270    Returns raw instruction data.  */
 271
 272 PyObject *
 273 recpy_bt_insn_data (PyObject *self, void *closure)
 274 {
 275   const btrace_insn * const insn = btrace_insn_from_recpy_insn (self);
 276   gdb_byte *buffer = NULL;
 277   PyObject *object;
 278
 279   if (insn == NULL)
 280     return NULL;
 281
 282   TRY
 283     {
 284       buffer = (gdb_byte *) xmalloc (insn->size);
 285       read_memory (insn->pc, buffer, insn->size);
 286     }
 287   CATCH (except, RETURN_MASK_ALL)
 288     {
 289       xfree (buffer);
 290       GDB_PY_HANDLE_EXCEPTION (except);
 291     }
 292   END_CATCH
 293
 294   object = PyBytes_FromStringAndSize ((const char*) buffer, insn->size);
 295   xfree (buffer);
 296
 297   if (object == NULL)
 298     return NULL;
 299
 300 #ifdef IS_PY3K
 301   return PyMemoryView_FromObject (object);
 302 #else
 303   return PyBuffer_FromObject (object, 0, Py_END_OF_BUFFER);
 304 #endif
 305
 306 }
 307
 308 /* Implementation of RecordInstruction.decoded [str] for btrace.
 309    Returns the instruction as human readable string.  */
 310
 311 PyObject *
 312 recpy_bt_insn_decoded (PyObject *self, void *closure)
 313 {
 314   const btrace_insn * const insn = btrace_insn_from_recpy_insn (self);
 315   string_file strfile;
 316
 317   if (insn == NULL)
 318     return NULL;
 319
 320   TRY
 321     {
 322       gdb_print_insn (target_gdbarch (), insn->pc, &strfile, NULL);
 323     }
 324   CATCH (except, RETURN_MASK_ALL)
 325     {
 326       gdbpy_convert_exception (except);
 327       return NULL;
 328     }
 329   END_CATCH
 330
 331
 332   return PyBytes_FromString (strfile.string ().c_str ());
 333 }
 334
 335 /* Implementation of RecordFunctionSegment.level [int] for btrace.
 336    Returns the call level.  */
 337
 338 PyObject *
 339 recpy_bt_func_level (PyObject *self, void *closure)
 340 {
 341   const btrace_function * const func = btrace_func_from_recpy_func (self);
 342   thread_info *tinfo;
 343
 344   if (func == NULL)
 345     return NULL;
 346
 347   tinfo = ((recpy_element_object *) self)->thread;
 348   return PyInt_FromLong (tinfo->btrace.level + func->level);
 349 }
 350
 351 /* Implementation of RecordFunctionSegment.symbol [gdb.Symbol] for btrace.
 352    Returns the symbol associated with this function call.  */
 353
 354 PyObject *
 355 recpy_bt_func_symbol (PyObject *self, void *closure)
 356 {
 357   const btrace_function * const func = btrace_func_from_recpy_func (self);
 358
 359   if (func == NULL)
 360     return NULL;
 361
 362   if (func->sym == NULL)
 363     Py_RETURN_NONE;
 364
 365   return symbol_to_symbol_object (func->sym);
 366 }
 367
 368 /* Implementation of RecordFunctionSegment.instructions [list] for btrace.
 369    Returns the list of instructions that belong to this function call.  */
 370
 371 PyObject *
 372 recpy_bt_func_instructions (PyObject *self, void *closure)
 373 {
 374   const btrace_function * const func = btrace_func_from_recpy_func (self);
 375   unsigned int len;
 376
 377   if (func == NULL)
 378     return NULL;
 379
 380   len = func->insn.size ();
 381
 382   /* Gaps count as one instruction.  */
 383   if (len == 0)
 384     len = 1;
 385
 386   return btpy_list_new (((recpy_element_object *) self)->thread,
 387                         func->insn_offset, func->insn_offset + len, 1,
 388                         &recpy_insn_type);
 389 }
 390
 391 /* Implementation of RecordFunctionSegment.up [RecordFunctionSegment] for
 392    btrace.  Returns the caller / returnee of this function.  */
 393
 394 PyObject *
 395 recpy_bt_func_up (PyObject *self, void *closure)
 396 {
 397   const btrace_function * const func = btrace_func_from_recpy_func (self);
 398
 399   if (func == NULL)
 400     return NULL;
 401
 402   if (func->up == 0)
 403     Py_RETURN_NONE;
 404
 405   return recpy_func_new (((recpy_element_object *) self)->thread,
 406                          RECORD_METHOD_BTRACE, func->up);
 407 }
 408
 409 /* Implementation of RecordFunctionSegment.prev [RecordFunctionSegment] for
 410    btrace.  Returns a previous segment of this function.  */
 411
 412 PyObject *
 413 recpy_bt_func_prev (PyObject *self, void *closure)
 414 {
 415   const btrace_function * const func = btrace_func_from_recpy_func (self);
 416
 417   if (func == NULL)
 418     return NULL;
 419
 420   if (func->prev == 0)
 421     Py_RETURN_NONE;
 422
 423   return recpy_func_new (((recpy_element_object *) self)->thread,
 424                          RECORD_METHOD_BTRACE, func->prev);
 425 }
 426
 427 /* Implementation of RecordFunctionSegment.next [RecordFunctionSegment] for
 428    btrace.  Returns a following segment of this function.  */
 429
 430 PyObject *
 431 recpy_bt_func_next (PyObject *self, void *closure)
 432 {
 433   const btrace_function * const func = btrace_func_from_recpy_func (self);
 434
 435   if (func == NULL)
 436     return NULL;
 437
 438   if (func->next == 0)
 439     Py_RETURN_NONE;
 440
 441   return recpy_func_new (((recpy_element_object *) self)->thread,
 442                          RECORD_METHOD_BTRACE, func->next);
 443 }
 444
 445 /* Implementation of BtraceList.__len__ (self) -> int.  */
 446
 447 static Py_ssize_t
 448 btpy_list_length (PyObject *self)
 449 {
 450   const btpy_list_object * const obj = (btpy_list_object *) self;
 451   const Py_ssize_t distance = obj->last - obj->first;
 452   const Py_ssize_t result = distance / obj->step;
 453
 454   if ((distance % obj->step) == 0)
 455     return result;
 456
 457   return result + 1;
 458 }
 459
 460 /* Implementation of
 461    BtraceList.__getitem__ (self, key) -> BtraceInstruction and
 462    BtraceList.__getitem__ (self, key) -> BtraceFunctionCall.  */
 463
 464 static PyObject *
 465 btpy_list_item (PyObject *self, Py_ssize_t index)
 466 {
 467   const btpy_list_object * const obj = (btpy_list_object *) self;
 468   Py_ssize_t number;
 469
 470   if (index < 0 || index >= btpy_list_length (self))
 471     return PyErr_Format (PyExc_IndexError, _("Index out of range: %zd."),
 472                          index);
 473
 474   number = obj->first + (obj->step * index);
 475
 476   if (obj->element_type == &recpy_insn_type)
 477     return recpy_insn_new (obj->thread, RECORD_METHOD_BTRACE, number);
 478   else
 479     return recpy_func_new (obj->thread, RECORD_METHOD_BTRACE, number);
 480 }
 481
 482 /* Implementation of BtraceList.__getitem__ (self, slice) -> BtraceList.  */
 483
 484 static PyObject *
 485 btpy_list_slice (PyObject *self, PyObject *value)
 486 {
 487   const btpy_list_object * const obj = (btpy_list_object *) self;
 488   const Py_ssize_t length = btpy_list_length (self);
 489   Py_ssize_t start, stop, step, slicelength;
 490
 491   if (PyInt_Check (value))
 492     {
 493       Py_ssize_t index = PyInt_AsSsize_t (value);
 494
 495       /* Emulate Python behavior for negative indices.  */
 496       if (index < 0)
 497         index += length;
 498
 499       return btpy_list_item (self, index);
 500     }
 501
 502   if (!PySlice_Check (value))
 503     return PyErr_Format (PyExc_TypeError, _("Index must be int or slice."));
 504
 505   if (0 != PySlice_GetIndicesEx (BTPY_PYSLICE (value), length, &start, &stop,
 506                                  &step, &slicelength))
 507     return NULL;
 508
 509   return btpy_list_new (obj->thread, obj->first + obj->step * start,
 510                         obj->first + obj->step * stop, obj->step * step,
 511                         obj->element_type);
 512 }
 513
 514 /* Helper function that returns the position of an element in a BtraceList
 515    or -1 if the element is not in the list.  */
 516
 517 static LONGEST
 518 btpy_list_position (PyObject *self, PyObject *value)
 519 {
 520   const btpy_list_object * const list_obj = (btpy_list_object *) self;
 521   const recpy_element_object * const obj = (const recpy_element_object *) value;
 522   Py_ssize_t index = obj->number;
 523
 524   if (list_obj->element_type != Py_TYPE (value))
 525     return -1;
 526
 527   if (list_obj->thread != obj->thread)
 528     return -1;
 529
 530   if (index < list_obj->first || index > list_obj->last)
 531     return -1;
 532
 533   index -= list_obj->first;
 534
 535   if (index % list_obj->step != 0)
 536     return -1;
 537
 538   return index / list_obj->step;
 539 }
 540
 541 /* Implementation of "in" operator for BtraceLists.  */
 542
 543 static int
 544 btpy_list_contains (PyObject *self, PyObject *value)
 545 {
 546   if (btpy_list_position (self, value) < 0)
 547     return 0;
 548
 549   return 1;
 550 }
 551
 552 /* Implementation of BtraceLists.index (self, value) -> int.  */
 553
 554 static PyObject *
 555 btpy_list_index (PyObject *self, PyObject *value)
 556 {
 557   const LONGEST index = btpy_list_position (self, value);
 558
 559   if (index < 0)
 560     return PyErr_Format (PyExc_ValueError, _("Not in list."));
 561
 562   return gdb_py_long_from_longest (index);
 563 }
 564
 565 /* Implementation of BtraceList.count (self, value) -> int.  */
 566
 567 static PyObject *
 568 btpy_list_count (PyObject *self, PyObject *value)
 569 {
 570   /* We know that if an element is in the list, it is so exactly one time,
 571      enabling us to reuse the "is element of" check.  */
 572   return PyInt_FromLong (btpy_list_contains (self, value));
 573 }
 574
 575 /* Python rich compare function to allow for equality and inequality checks
 576    in Python.  */
 577
 578 static PyObject *
 579 btpy_list_richcompare (PyObject *self, PyObject *other, int op)
 580 {
 581   const btpy_list_object * const obj1 = (btpy_list_object *) self;
 582   const btpy_list_object * const obj2 = (btpy_list_object *) other;
 583
 584   if (Py_TYPE (self) != Py_TYPE (other))
 585     {
 586       Py_INCREF (Py_NotImplemented);
 587       return Py_NotImplemented;
 588     }
 589
 590   switch (op)
 591   {
 592     case Py_EQ:
 593       if (obj1->thread == obj2->thread
 594           && obj1->element_type == obj2->element_type
 595           && obj1->first == obj2->first
 596           && obj1->last == obj2->last
 597           && obj1->step == obj2->step)
 598         Py_RETURN_TRUE;
 599       else
 600         Py_RETURN_FALSE;
 601
 602     case Py_NE:
 603       if (obj1->thread != obj2->thread
 604           || obj1->element_type != obj2->element_type
 605           || obj1->first != obj2->first
 606           || obj1->last != obj2->last
 607           || obj1->step != obj2->step)
 608         Py_RETURN_TRUE;
 609       else
 610         Py_RETURN_FALSE;
 611
 612     default:
 613       break;
 614   }
 615
 616   Py_INCREF (Py_NotImplemented);
 617   return Py_NotImplemented;
 618 }
 619
 620 /* Implementation of
 621    BtraceRecord.method [str].  */
 622
 623 PyObject *
 624 recpy_bt_method (PyObject *self, void *closure)
 625 {
 626   return PyString_FromString ("btrace");
 627 }
 628
 629 /* Implementation of
 630    BtraceRecord.format [str].  */
 631
 632 PyObject *
 633 recpy_bt_format (PyObject *self, void *closure)
 634 {
 635   const recpy_record_object * const record = (recpy_record_object *) self;
 636   const struct thread_info * const tinfo = record->thread;
 637   const struct btrace_config * config;
 638
 639   if (tinfo == NULL)
 640     Py_RETURN_NONE;
 641
 642   config = btrace_conf (&tinfo->btrace);
 643
 644   if (config == NULL)
 645     Py_RETURN_NONE;
 646
 647   return PyString_FromString (btrace_format_short_string (config->format));
 648 }
 649
 650 /* Implementation of
 651    BtraceRecord.replay_position [BtraceInstruction].  */
 652
 653 PyObject *
 654 recpy_bt_replay_position (PyObject *self, void *closure)
 655 {
 656   const recpy_record_object * const record = (recpy_record_object *) self;
 657   thread_info * tinfo = record->thread;
 658
 659   if (tinfo == NULL)
 660     Py_RETURN_NONE;
 661
 662   if (tinfo->btrace.replay == NULL)
 663     Py_RETURN_NONE;
 664
 665   return btpy_insn_or_gap_new (tinfo,
 666                                btrace_insn_number (tinfo->btrace.replay));
 667 }
 668
 669 /* Implementation of
 670    BtraceRecord.begin [BtraceInstruction].  */
 671
 672 PyObject *
 673 recpy_bt_begin (PyObject *self, void *closure)
 674 {
 675   const recpy_record_object * const record = (recpy_record_object *) self;
 676   thread_info *const tinfo = record->thread;
 677   struct btrace_insn_iterator iterator;
 678
 679   if (tinfo == NULL)
 680     Py_RETURN_NONE;
 681
 682   btrace_fetch (tinfo, record_btrace_get_cpu ());
 683
 684   if (btrace_is_empty (tinfo))
 685     Py_RETURN_NONE;
 686
 687   btrace_insn_begin (&iterator, &tinfo->btrace);
 688   return btpy_insn_or_gap_new (tinfo, btrace_insn_number (&iterator));
 689 }
 690
 691 /* Implementation of
 692    BtraceRecord.end [BtraceInstruction].  */
 693
 694 PyObject *
 695 recpy_bt_end (PyObject *self, void *closure)
 696 {
 697   const recpy_record_object * const record = (recpy_record_object *) self;
 698   thread_info *const tinfo = record->thread;
 699   struct btrace_insn_iterator iterator;
 700
 701   if (tinfo == NULL)
 702     Py_RETURN_NONE;
 703
 704   btrace_fetch (tinfo, record_btrace_get_cpu ());
 705
 706   if (btrace_is_empty (tinfo))
 707     Py_RETURN_NONE;
 708
 709   btrace_insn_end (&iterator, &tinfo->btrace);
 710   return btpy_insn_or_gap_new (tinfo, btrace_insn_number (&iterator));
 711 }
 712
 713 /* Implementation of
 714    BtraceRecord.instruction_history [list].  */
 715
 716 PyObject *
 717 recpy_bt_instruction_history (PyObject *self, void *closure)
 718 {
 719   const recpy_record_object * const record = (recpy_record_object *) self;
 720   thread_info *const tinfo = record->thread;
 721   struct btrace_insn_iterator iterator;
 722   unsigned long first = 0;
 723   unsigned long last = 0;
 724
 725    if (tinfo == NULL)
 726      Py_RETURN_NONE;
 727
 728    btrace_fetch (tinfo, record_btrace_get_cpu ());
 729
 730    if (btrace_is_empty (tinfo))
 731      Py_RETURN_NONE;
 732
 733    btrace_insn_begin (&iterator, &tinfo->btrace);
 734    first = btrace_insn_number (&iterator);
 735
 736    btrace_insn_end (&iterator, &tinfo->btrace);
 737    last = btrace_insn_number (&iterator);
 738
 739    return btpy_list_new (tinfo, first, last, 1, &recpy_insn_type);
 740 }
 741
 742 /* Implementation of
 743    BtraceRecord.function_call_history [list].  */
 744
 745 PyObject *
 746 recpy_bt_function_call_history (PyObject *self, void *closure)
 747 {
 748   const recpy_record_object * const record = (recpy_record_object *) self;
 749   thread_info *const tinfo = record->thread;
 750   struct btrace_call_iterator iterator;
 751   unsigned long first = 0;
 752   unsigned long last = 0;
 753
 754   if (tinfo == NULL)
 755     Py_RETURN_NONE;
 756
 757   btrace_fetch (tinfo, record_btrace_get_cpu ());
 758
 759   if (btrace_is_empty (tinfo))
 760     Py_RETURN_NONE;
 761
 762   btrace_call_begin (&iterator, &tinfo->btrace);
 763   first = btrace_call_number (&iterator);
 764
 765   btrace_call_end (&iterator, &tinfo->btrace);
 766   last = btrace_call_number (&iterator);
 767
 768   return btpy_list_new (tinfo, first, last, 1, &recpy_func_type);
 769 }
 770
 771 /* Implementation of BtraceRecord.goto (self, BtraceInstruction) -> None.  */
 772
 773 PyObject *
 774 recpy_bt_goto (PyObject *self, PyObject *args)
 775 {
 776   const recpy_record_object * const record = (recpy_record_object *) self;
 777   thread_info *const tinfo = record->thread;
 778   const recpy_element_object *obj;
 779
 780   if (tinfo == NULL || btrace_is_empty (tinfo))
 781         return PyErr_Format (gdbpy_gdb_error, _("Empty branch trace."));
 782
 783   if (!PyArg_ParseTuple (args, "O", &obj))
 784     return NULL;
 785
 786   if (Py_TYPE (obj) != &recpy_insn_type)
 787     return PyErr_Format (PyExc_TypeError, _("Argument must be instruction."));
 788
 789   TRY
 790     {
 791       struct btrace_insn_iterator iter;
 792
 793       btrace_insn_end (&iter, &tinfo->btrace);
 794
 795       if (btrace_insn_number (&iter) == obj->number)
 796         target_goto_record_end ();
 797       else
 798         target_goto_record (obj->number);
 799     }
 800   CATCH (except, RETURN_MASK_ALL)
 801     {
 802       GDB_PY_HANDLE_EXCEPTION (except);
 803     }
 804   END_CATCH
 805
 806   Py_RETURN_NONE;
 807 }
 808
 809 /* BtraceList methods.  */
 810
 811 struct PyMethodDef btpy_list_methods[] =
 812 {
 813   { "count", btpy_list_count, METH_O, "count number of occurences"},
 814   { "index", btpy_list_index, METH_O, "index of entry"},
 815   {NULL}
 816 };
 817
 818 /* BtraceList sequence methods.  */
 819
 820 static PySequenceMethods btpy_list_sequence_methods =
 821 {
 822   NULL
 823 };
 824
 825 /* BtraceList mapping methods.  Necessary for slicing.  */
 826
 827 static PyMappingMethods btpy_list_mapping_methods =
 828 {
 829   NULL
 830 };
 831
 832 /* Sets up the btrace record API.  */
 833
 834 int
 835 gdbpy_initialize_btrace (void)
 836 {
 837   btpy_list_type.tp_new = PyType_GenericNew;
 838   btpy_list_type.tp_flags = Py_TPFLAGS_DEFAULT;
 839   btpy_list_type.tp_basicsize = sizeof (btpy_list_object);
 840   btpy_list_type.tp_name = "gdb.BtraceObjectList";
 841   btpy_list_type.tp_doc = "GDB btrace list object";
 842   btpy_list_type.tp_methods = btpy_list_methods;
 843   btpy_list_type.tp_as_sequence = &btpy_list_sequence_methods;
 844   btpy_list_type.tp_as_mapping = &btpy_list_mapping_methods;
 845   btpy_list_type.tp_richcompare = btpy_list_richcompare;
 846
 847   btpy_list_sequence_methods.sq_item = btpy_list_item;
 848   btpy_list_sequence_methods.sq_length = btpy_list_length;
 849   btpy_list_sequence_methods.sq_contains = btpy_list_contains;
 850
 851   btpy_list_mapping_methods.mp_subscript = btpy_list_slice;
 852
 853   return PyType_Ready (&btpy_list_type);
 854 }