tools/perf/util/scripting-engines/trace-event-python.c

   1 /*
   2  * trace-event-python.  Feed trace events to an embedded Python interpreter.
   3  *
   4  * Copyright (C) 2010 Tom Zanussi <[email protected]>
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  */
  21
  22 #include <Python.h>
  23
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <stdbool.h>
  28 #include <errno.h>
  29 #include <linux/bitmap.h>
  30
  31 #include "../../perf.h"
  32 #include "../debug.h"
  33 #include "../callchain.h"
  34 #include "../evsel.h"
  35 #include "../util.h"
  36 #include "../event.h"
  37 #include "../thread.h"
  38 #include "../comm.h"
  39 #include "../machine.h"
  40 #include "../db-export.h"
  41 #include "../thread-stack.h"
  42 #include "../trace-event.h"
  43 #include "../machine.h"
  44 #include "../call-path.h"
  45 #include "thread_map.h"
  46 #include "cpumap.h"
  47 #include "stat.h"
  48
  49 PyMODINIT_FUNC initperf_trace_context(void);
  50
  51 #define TRACE_EVENT_TYPE_MAX                            \
  52         ((1 << (sizeof(unsigned short) * 8)) - 1)
  53
  54 static DECLARE_BITMAP(events_defined, TRACE_EVENT_TYPE_MAX);
  55
  56 #define MAX_FIELDS      64
  57 #define N_COMMON_FIELDS 7
  58
  59 extern struct scripting_context *scripting_context;
  60
  61 static char *cur_field_name;
  62 static int zero_flag_atom;
  63
  64 static PyObject *main_module, *main_dict;
  65
  66 struct tables {
  67         struct db_export        dbe;
  68         PyObject                *evsel_handler;
  69         PyObject                *machine_handler;
  70         PyObject                *thread_handler;
  71         PyObject                *comm_handler;
  72         PyObject                *comm_thread_handler;
  73         PyObject                *dso_handler;
  74         PyObject                *symbol_handler;
  75         PyObject                *branch_type_handler;
  76         PyObject                *sample_handler;
  77         PyObject                *call_path_handler;
  78         PyObject                *call_return_handler;
  79         bool                    db_export_mode;
  80 };
  81
  82 static struct tables tables_global;
  83
  84 static void handler_call_die(const char *handler_name) NORETURN;
  85 static void handler_call_die(const char *handler_name)
  86 {
  87         PyErr_Print();
  88         Py_FatalError("problem in Python trace event handler");
  89         // Py_FatalError does not return
  90         // but we have to make the compiler happy
  91         abort();
  92 }
  93
  94 /*
  95  * Insert val into into the dictionary and decrement the reference counter.
  96  * This is necessary for dictionaries since PyDict_SetItemString() does not
  97  * steal a reference, as opposed to PyTuple_SetItem().
  98  */
  99 static void pydict_set_item_string_decref(PyObject *dict, const char *key, PyObject *val)
 100 {
 101         PyDict_SetItemString(dict, key, val);
 102         Py_DECREF(val);
 103 }
 104
 105 static PyObject *get_handler(const char *handler_name)
 106 {
 107         PyObject *handler;
 108
 109         handler = PyDict_GetItemString(main_dict, handler_name);
 110         if (handler && !PyCallable_Check(handler))
 111                 return NULL;
 112         return handler;
 113 }
 114
 115 static void call_object(PyObject *handler, PyObject *args, const char *die_msg)
 116 {
 117         PyObject *retval;
 118
 119         retval = PyObject_CallObject(handler, args);
 120         if (retval == NULL)
 121                 handler_call_die(die_msg);
 122         Py_DECREF(retval);
 123 }
 124
 125 static void try_call_object(const char *handler_name, PyObject *args)
 126 {
 127         PyObject *handler;
 128
 129         handler = get_handler(handler_name);
 130         if (handler)
 131                 call_object(handler, args, handler_name);
 132 }
 133
 134 static void define_value(enum print_arg_type field_type,
 135                          const char *ev_name,
 136                          const char *field_name,
 137                          const char *field_value,
 138                          const char *field_str)
 139 {
 140         const char *handler_name = "define_flag_value";
 141         PyObject *t;
 142         unsigned long long value;
 143         unsigned n = 0;
 144
 145         if (field_type == PRINT_SYMBOL)
 146                 handler_name = "define_symbolic_value";
 147
 148         t = PyTuple_New(4);
 149         if (!t)
 150                 Py_FatalError("couldn't create Python tuple");
 151
 152         value = eval_flag(field_value);
 153
 154         PyTuple_SetItem(t, n++, PyString_FromString(ev_name));
 155         PyTuple_SetItem(t, n++, PyString_FromString(field_name));
 156         PyTuple_SetItem(t, n++, PyInt_FromLong(value));
 157         PyTuple_SetItem(t, n++, PyString_FromString(field_str));
 158
 159         try_call_object(handler_name, t);
 160
 161         Py_DECREF(t);
 162 }
 163
 164 static void define_values(enum print_arg_type field_type,
 165                           struct print_flag_sym *field,
 166                           const char *ev_name,
 167                           const char *field_name)
 168 {
 169         define_value(field_type, ev_name, field_name, field->value,
 170                      field->str);
 171
 172         if (field->next)
 173                 define_values(field_type, field->next, ev_name, field_name);
 174 }
 175
 176 static void define_field(enum print_arg_type field_type,
 177                          const char *ev_name,
 178                          const char *field_name,
 179                          const char *delim)
 180 {
 181         const char *handler_name = "define_flag_field";
 182         PyObject *t;
 183         unsigned n = 0;
 184
 185         if (field_type == PRINT_SYMBOL)
 186                 handler_name = "define_symbolic_field";
 187
 188         if (field_type == PRINT_FLAGS)
 189                 t = PyTuple_New(3);
 190         else
 191                 t = PyTuple_New(2);
 192         if (!t)
 193                 Py_FatalError("couldn't create Python tuple");
 194
 195         PyTuple_SetItem(t, n++, PyString_FromString(ev_name));
 196         PyTuple_SetItem(t, n++, PyString_FromString(field_name));
 197         if (field_type == PRINT_FLAGS)
 198                 PyTuple_SetItem(t, n++, PyString_FromString(delim));
 199
 200         try_call_object(handler_name, t);
 201
 202         Py_DECREF(t);
 203 }
 204
 205 static void define_event_symbols(struct event_format *event,
 206                                  const char *ev_name,
 207                                  struct print_arg *args)
 208 {
 209         if (args == NULL)
 210                 return;
 211
 212         switch (args->type) {
 213         case PRINT_NULL:
 214                 break;
 215         case PRINT_ATOM:
 216                 define_value(PRINT_FLAGS, ev_name, cur_field_name, "0",
 217                              args->atom.atom);
 218                 zero_flag_atom = 0;
 219                 break;
 220         case PRINT_FIELD:
 221                 free(cur_field_name);
 222                 cur_field_name = strdup(args->field.name);
 223                 break;
 224         case PRINT_FLAGS:
 225                 define_event_symbols(event, ev_name, args->flags.field);
 226                 define_field(PRINT_FLAGS, ev_name, cur_field_name,
 227                              args->flags.delim);
 228                 define_values(PRINT_FLAGS, args->flags.flags, ev_name,
 229                               cur_field_name);
 230                 break;
 231         case PRINT_SYMBOL:
 232                 define_event_symbols(event, ev_name, args->symbol.field);
 233                 define_field(PRINT_SYMBOL, ev_name, cur_field_name, NULL);
 234                 define_values(PRINT_SYMBOL, args->symbol.symbols, ev_name,
 235                               cur_field_name);
 236                 break;
 237         case PRINT_HEX:
 238                 define_event_symbols(event, ev_name, args->hex.field);
 239                 define_event_symbols(event, ev_name, args->hex.size);
 240                 break;
 241         case PRINT_INT_ARRAY:
 242                 define_event_symbols(event, ev_name, args->int_array.field);
 243                 define_event_symbols(event, ev_name, args->int_array.count);
 244                 define_event_symbols(event, ev_name, args->int_array.el_size);
 245                 break;
 246         case PRINT_STRING:
 247                 break;
 248         case PRINT_TYPE:
 249                 define_event_symbols(event, ev_name, args->typecast.item);
 250                 break;
 251         case PRINT_OP:
 252                 if (strcmp(args->op.op, ":") == 0)
 253                         zero_flag_atom = 1;
 254                 define_event_symbols(event, ev_name, args->op.left);
 255                 define_event_symbols(event, ev_name, args->op.right);
 256                 break;
 257         default:
 258                 /* gcc warns for these? */
 259         case PRINT_BSTRING:
 260         case PRINT_DYNAMIC_ARRAY:
 261         case PRINT_DYNAMIC_ARRAY_LEN:
 262         case PRINT_FUNC:
 263         case PRINT_BITMASK:
 264                 /* we should warn... */
 265                 return;
 266         }
 267
 268         if (args->next)
 269                 define_event_symbols(event, ev_name, args->next);
 270 }
 271
 272 static PyObject *get_field_numeric_entry(struct event_format *event,
 273                 struct format_field *field, void *data)
 274 {
 275         bool is_array = field->flags & FIELD_IS_ARRAY;
 276         PyObject *obj = NULL, *list = NULL;
 277         unsigned long long val;
 278         unsigned int item_size, n_items, i;
 279
 280         if (is_array) {
 281                 list = PyList_New(field->arraylen);
 282                 item_size = field->size / field->arraylen;
 283                 n_items = field->arraylen;
 284         } else {
 285                 item_size = field->size;
 286                 n_items = 1;
 287         }
 288
 289         for (i = 0; i < n_items; i++) {
 290
 291                 val = read_size(event, data + field->offset + i * item_size,
 292                                 item_size);
 293                 if (field->flags & FIELD_IS_SIGNED) {
 294                         if ((long long)val >= LONG_MIN &&
 295                                         (long long)val <= LONG_MAX)
 296                                 obj = PyInt_FromLong(val);
 297                         else
 298                                 obj = PyLong_FromLongLong(val);
 299                 } else {
 300                         if (val <= LONG_MAX)
 301                                 obj = PyInt_FromLong(val);
 302                         else
 303                                 obj = PyLong_FromUnsignedLongLong(val);
 304                 }
 305                 if (is_array)
 306                         PyList_SET_ITEM(list, i, obj);
 307         }
 308         if (is_array)
 309                 obj = list;
 310         return obj;
 311 }
 312
 313
 314 static PyObject *python_process_callchain(struct perf_sample *sample,
 315                                          struct perf_evsel *evsel,
 316                                          struct addr_location *al)
 317 {
 318         PyObject *pylist;
 319
 320         pylist = PyList_New(0);
 321         if (!pylist)
 322                 Py_FatalError("couldn't create Python list");
 323
 324         if (!symbol_conf.use_callchain || !sample->callchain)
 325                 goto exit;
 326
 327         if (thread__resolve_callchain(al->thread, &callchain_cursor, evsel,
 328                                       sample, NULL, NULL,
 329                                       scripting_max_stack) != 0) {
 330                 pr_err("Failed to resolve callchain. Skipping\n");
 331                 goto exit;
 332         }
 333         callchain_cursor_commit(&callchain_cursor);
 334
 335
 336         while (1) {
 337                 PyObject *pyelem;
 338                 struct callchain_cursor_node *node;
 339                 node = callchain_cursor_current(&callchain_cursor);
 340                 if (!node)
 341                         break;
 342
 343                 pyelem = PyDict_New();
 344                 if (!pyelem)
 345                         Py_FatalError("couldn't create Python dictionary");
 346
 347
 348                 pydict_set_item_string_decref(pyelem, "ip",
 349                                 PyLong_FromUnsignedLongLong(node->ip));
 350
 351                 if (node->sym) {
 352                         PyObject *pysym  = PyDict_New();
 353                         if (!pysym)
 354                                 Py_FatalError("couldn't create Python dictionary");
 355                         pydict_set_item_string_decref(pysym, "start",
 356                                         PyLong_FromUnsignedLongLong(node->sym->start));
 357                         pydict_set_item_string_decref(pysym, "end",
 358                                         PyLong_FromUnsignedLongLong(node->sym->end));
 359                         pydict_set_item_string_decref(pysym, "binding",
 360                                         PyInt_FromLong(node->sym->binding));
 361                         pydict_set_item_string_decref(pysym, "name",
 362                                         PyString_FromStringAndSize(node->sym->name,
 363                                                         node->sym->namelen));
 364                         pydict_set_item_string_decref(pyelem, "sym", pysym);
 365                 }
 366
 367                 if (node->map) {
 368                         struct map *map = node->map;
 369                         const char *dsoname = "[unknown]";
 370                         if (map && map->dso && (map->dso->name || map->dso->long_name)) {
 371                                 if (symbol_conf.show_kernel_path && map->dso->long_name)
 372                                         dsoname = map->dso->long_name;
 373                                 else if (map->dso->name)
 374                                         dsoname = map->dso->name;
 375                         }
 376                         pydict_set_item_string_decref(pyelem, "dso",
 377                                         PyString_FromString(dsoname));
 378                 }
 379
 380                 callchain_cursor_advance(&callchain_cursor);
 381                 PyList_Append(pylist, pyelem);
 382                 Py_DECREF(pyelem);
 383         }
 384
 385 exit:
 386         return pylist;
 387 }
 388
 389 static void python_process_tracepoint(struct perf_sample *sample,
 390                                       struct perf_evsel *evsel,
 391                                       struct addr_location *al)
 392 {
 393         struct event_format *event = evsel->tp_format;
 394         PyObject *handler, *context, *t, *obj = NULL, *callchain;
 395         PyObject *dict = NULL;
 396         static char handler_name[256];
 397         struct format_field *field;
 398         unsigned long s, ns;
 399         unsigned n = 0;
 400         int pid;
 401         int cpu = sample->cpu;
 402         void *data = sample->raw_data;
 403         unsigned long long nsecs = sample->time;
 404         const char *comm = thread__comm_str(al->thread);
 405
 406         t = PyTuple_New(MAX_FIELDS);
 407         if (!t)
 408                 Py_FatalError("couldn't create Python tuple");
 409
 410         if (!event) {
 411                 snprintf(handler_name, sizeof(handler_name),
 412                          "ug! no event found for type %" PRIu64, (u64)evsel->attr.config);
 413                 Py_FatalError(handler_name);
 414         }
 415
 416         pid = raw_field_value(event, "common_pid", data);
 417
 418         sprintf(handler_name, "%s__%s", event->system, event->name);
 419
 420         if (!test_and_set_bit(event->id, events_defined))
 421                 define_event_symbols(event, handler_name, event->print_fmt.args);
 422
 423         handler = get_handler(handler_name);
 424         if (!handler) {
 425                 dict = PyDict_New();
 426                 if (!dict)
 427                         Py_FatalError("couldn't create Python dict");
 428         }
 429         s = nsecs / NSECS_PER_SEC;
 430         ns = nsecs - s * NSECS_PER_SEC;
 431
 432         scripting_context->event_data = data;
 433         scripting_context->pevent = evsel->tp_format->pevent;
 434
 435         context = PyCObject_FromVoidPtr(scripting_context, NULL);
 436
 437         PyTuple_SetItem(t, n++, PyString_FromString(handler_name));
 438         PyTuple_SetItem(t, n++, context);
 439
 440         /* ip unwinding */
 441         callchain = python_process_callchain(sample, evsel, al);
 442
 443         if (handler) {
 444                 PyTuple_SetItem(t, n++, PyInt_FromLong(cpu));
 445                 PyTuple_SetItem(t, n++, PyInt_FromLong(s));
 446                 PyTuple_SetItem(t, n++, PyInt_FromLong(ns));
 447                 PyTuple_SetItem(t, n++, PyInt_FromLong(pid));
 448                 PyTuple_SetItem(t, n++, PyString_FromString(comm));
 449                 PyTuple_SetItem(t, n++, callchain);
 450         } else {
 451                 pydict_set_item_string_decref(dict, "common_cpu", PyInt_FromLong(cpu));
 452                 pydict_set_item_string_decref(dict, "common_s", PyInt_FromLong(s));
 453                 pydict_set_item_string_decref(dict, "common_ns", PyInt_FromLong(ns));
 454                 pydict_set_item_string_decref(dict, "common_pid", PyInt_FromLong(pid));
 455                 pydict_set_item_string_decref(dict, "common_comm", PyString_FromString(comm));
 456                 pydict_set_item_string_decref(dict, "common_callchain", callchain);
 457         }
 458         for (field = event->format.fields; field; field = field->next) {
 459                 unsigned int offset, len;
 460                 unsigned long long val;
 461
 462                 if (field->flags & FIELD_IS_ARRAY) {
 463                         offset = field->offset;
 464                         len    = field->size;
 465                         if (field->flags & FIELD_IS_DYNAMIC) {
 466                                 val     = pevent_read_number(scripting_context->pevent,
 467                                                              data + offset, len);
 468                                 offset  = val;
 469                                 len     = offset >> 16;
 470                                 offset &= 0xffff;
 471                         }
 472                         if (field->flags & FIELD_IS_STRING &&
 473                             is_printable_array(data + offset, len)) {
 474                                 obj = PyString_FromString((char *) data + offset);
 475                         } else {
 476                                 obj = PyByteArray_FromStringAndSize((const char *) data + offset, len);
 477                                 field->flags &= ~FIELD_IS_STRING;
 478                         }
 479                 } else { /* FIELD_IS_NUMERIC */
 480                         obj = get_field_numeric_entry(event, field, data);
 481                 }
 482                 if (handler)
 483                         PyTuple_SetItem(t, n++, obj);
 484                 else
 485                         pydict_set_item_string_decref(dict, field->name, obj);
 486
 487         }
 488
 489         if (!handler)
 490                 PyTuple_SetItem(t, n++, dict);
 491
 492         if (_PyTuple_Resize(&t, n) == -1)
 493                 Py_FatalError("error resizing Python tuple");
 494
 495         if (handler) {
 496                 call_object(handler, t, handler_name);
 497         } else {
 498                 try_call_object("trace_unhandled", t);
 499                 Py_DECREF(dict);
 500         }
 501
 502         Py_DECREF(t);
 503 }
 504
 505 static PyObject *tuple_new(unsigned int sz)
 506 {
 507         PyObject *t;
 508
 509         t = PyTuple_New(sz);
 510         if (!t)
 511                 Py_FatalError("couldn't create Python tuple");
 512         return t;
 513 }
 514
 515 static int tuple_set_u64(PyObject *t, unsigned int pos, u64 val)
 516 {
 517 #if BITS_PER_LONG == 64
 518         return PyTuple_SetItem(t, pos, PyInt_FromLong(val));
 519 #endif
 520 #if BITS_PER_LONG == 32
 521         return PyTuple_SetItem(t, pos, PyLong_FromLongLong(val));
 522 #endif
 523 }
 524
 525 static int tuple_set_s32(PyObject *t, unsigned int pos, s32 val)
 526 {
 527         return PyTuple_SetItem(t, pos, PyInt_FromLong(val));
 528 }
 529
 530 static int tuple_set_string(PyObject *t, unsigned int pos, const char *s)
 531 {
 532         return PyTuple_SetItem(t, pos, PyString_FromString(s));
 533 }
 534
 535 static int python_export_evsel(struct db_export *dbe, struct perf_evsel *evsel)
 536 {
 537         struct tables *tables = container_of(dbe, struct tables, dbe);
 538         PyObject *t;
 539
 540         t = tuple_new(2);
 541
 542         tuple_set_u64(t, 0, evsel->db_id);
 543         tuple_set_string(t, 1, perf_evsel__name(evsel));
 544
 545         call_object(tables->evsel_handler, t, "evsel_table");
 546
 547         Py_DECREF(t);
 548
 549         return 0;
 550 }
 551
 552 static int python_export_machine(struct db_export *dbe,
 553                                  struct machine *machine)
 554 {
 555         struct tables *tables = container_of(dbe, struct tables, dbe);
 556         PyObject *t;
 557
 558         t = tuple_new(3);
 559
 560         tuple_set_u64(t, 0, machine->db_id);
 561         tuple_set_s32(t, 1, machine->pid);
 562         tuple_set_string(t, 2, machine->root_dir ? machine->root_dir : "");
 563
 564         call_object(tables->machine_handler, t, "machine_table");
 565
 566         Py_DECREF(t);
 567
 568         return 0;
 569 }
 570
 571 static int python_export_thread(struct db_export *dbe, struct thread *thread,
 572                                 u64 main_thread_db_id, struct machine *machine)
 573 {
 574         struct tables *tables = container_of(dbe, struct tables, dbe);
 575         PyObject *t;
 576
 577         t = tuple_new(5);
 578
 579         tuple_set_u64(t, 0, thread->db_id);
 580         tuple_set_u64(t, 1, machine->db_id);
 581         tuple_set_u64(t, 2, main_thread_db_id);
 582         tuple_set_s32(t, 3, thread->pid_);
 583         tuple_set_s32(t, 4, thread->tid);
 584
 585         call_object(tables->thread_handler, t, "thread_table");
 586
 587         Py_DECREF(t);
 588
 589         return 0;
 590 }
 591
 592 static int python_export_comm(struct db_export *dbe, struct comm *comm)
 593 {
 594         struct tables *tables = container_of(dbe, struct tables, dbe);
 595         PyObject *t;
 596
 597         t = tuple_new(2);
 598
 599         tuple_set_u64(t, 0, comm->db_id);
 600         tuple_set_string(t, 1, comm__str(comm));
 601
 602         call_object(tables->comm_handler, t, "comm_table");
 603
 604         Py_DECREF(t);
 605
 606         return 0;
 607 }
 608
 609 static int python_export_comm_thread(struct db_export *dbe, u64 db_id,
 610                                      struct comm *comm, struct thread *thread)
 611 {
 612         struct tables *tables = container_of(dbe, struct tables, dbe);
 613         PyObject *t;
 614
 615         t = tuple_new(3);
 616
 617         tuple_set_u64(t, 0, db_id);
 618         tuple_set_u64(t, 1, comm->db_id);
 619         tuple_set_u64(t, 2, thread->db_id);
 620
 621         call_object(tables->comm_thread_handler, t, "comm_thread_table");
 622
 623         Py_DECREF(t);
 624
 625         return 0;
 626 }
 627
 628 static int python_export_dso(struct db_export *dbe, struct dso *dso,
 629                              struct machine *machine)
 630 {
 631         struct tables *tables = container_of(dbe, struct tables, dbe);
 632         char sbuild_id[SBUILD_ID_SIZE];
 633         PyObject *t;
 634
 635         build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id);
 636
 637         t = tuple_new(5);
 638
 639         tuple_set_u64(t, 0, dso->db_id);
 640         tuple_set_u64(t, 1, machine->db_id);
 641         tuple_set_string(t, 2, dso->short_name);
 642         tuple_set_string(t, 3, dso->long_name);
 643         tuple_set_string(t, 4, sbuild_id);
 644
 645         call_object(tables->dso_handler, t, "dso_table");
 646
 647         Py_DECREF(t);
 648
 649         return 0;
 650 }
 651
 652 static int python_export_symbol(struct db_export *dbe, struct symbol *sym,
 653                                 struct dso *dso)
 654 {
 655         struct tables *tables = container_of(dbe, struct tables, dbe);
 656         u64 *sym_db_id = symbol__priv(sym);
 657         PyObject *t;
 658
 659         t = tuple_new(6);
 660
 661         tuple_set_u64(t, 0, *sym_db_id);
 662         tuple_set_u64(t, 1, dso->db_id);
 663         tuple_set_u64(t, 2, sym->start);
 664         tuple_set_u64(t, 3, sym->end);
 665         tuple_set_s32(t, 4, sym->binding);
 666         tuple_set_string(t, 5, sym->name);
 667
 668         call_object(tables->symbol_handler, t, "symbol_table");
 669
 670         Py_DECREF(t);
 671
 672         return 0;
 673 }
 674
 675 static int python_export_branch_type(struct db_export *dbe, u32 branch_type,
 676                                      const char *name)
 677 {
 678         struct tables *tables = container_of(dbe, struct tables, dbe);
 679         PyObject *t;
 680
 681         t = tuple_new(2);
 682
 683         tuple_set_s32(t, 0, branch_type);
 684         tuple_set_string(t, 1, name);
 685
 686         call_object(tables->branch_type_handler, t, "branch_type_table");
 687
 688         Py_DECREF(t);
 689
 690         return 0;
 691 }
 692
 693 static int python_export_sample(struct db_export *dbe,
 694                                 struct export_sample *es)
 695 {
 696         struct tables *tables = container_of(dbe, struct tables, dbe);
 697         PyObject *t;
 698
 699         t = tuple_new(22);
 700
 701         tuple_set_u64(t, 0, es->db_id);
 702         tuple_set_u64(t, 1, es->evsel->db_id);
 703         tuple_set_u64(t, 2, es->al->machine->db_id);
 704         tuple_set_u64(t, 3, es->al->thread->db_id);
 705         tuple_set_u64(t, 4, es->comm_db_id);
 706         tuple_set_u64(t, 5, es->dso_db_id);
 707         tuple_set_u64(t, 6, es->sym_db_id);
 708         tuple_set_u64(t, 7, es->offset);
 709         tuple_set_u64(t, 8, es->sample->ip);
 710         tuple_set_u64(t, 9, es->sample->time);
 711         tuple_set_s32(t, 10, es->sample->cpu);
 712         tuple_set_u64(t, 11, es->addr_dso_db_id);
 713         tuple_set_u64(t, 12, es->addr_sym_db_id);
 714         tuple_set_u64(t, 13, es->addr_offset);
 715         tuple_set_u64(t, 14, es->sample->addr);
 716         tuple_set_u64(t, 15, es->sample->period);
 717         tuple_set_u64(t, 16, es->sample->weight);
 718         tuple_set_u64(t, 17, es->sample->transaction);
 719         tuple_set_u64(t, 18, es->sample->data_src);
 720         tuple_set_s32(t, 19, es->sample->flags & PERF_BRANCH_MASK);
 721         tuple_set_s32(t, 20, !!(es->sample->flags & PERF_IP_FLAG_IN_TX));
 722         tuple_set_u64(t, 21, es->call_path_id);
 723
 724         call_object(tables->sample_handler, t, "sample_table");
 725
 726         Py_DECREF(t);
 727
 728         return 0;
 729 }
 730
 731 static int python_export_call_path(struct db_export *dbe, struct call_path *cp)
 732 {
 733         struct tables *tables = container_of(dbe, struct tables, dbe);
 734         PyObject *t;
 735         u64 parent_db_id, sym_db_id;
 736
 737         parent_db_id = cp->parent ? cp->parent->db_id : 0;
 738         sym_db_id = cp->sym ? *(u64 *)symbol__priv(cp->sym) : 0;
 739
 740         t = tuple_new(4);
 741
 742         tuple_set_u64(t, 0, cp->db_id);
 743         tuple_set_u64(t, 1, parent_db_id);
 744         tuple_set_u64(t, 2, sym_db_id);
 745         tuple_set_u64(t, 3, cp->ip);
 746
 747         call_object(tables->call_path_handler, t, "call_path_table");
 748
 749         Py_DECREF(t);
 750
 751         return 0;
 752 }
 753
 754 static int python_export_call_return(struct db_export *dbe,
 755                                      struct call_return *cr)
 756 {
 757         struct tables *tables = container_of(dbe, struct tables, dbe);
 758         u64 comm_db_id = cr->comm ? cr->comm->db_id : 0;
 759         PyObject *t;
 760
 761         t = tuple_new(11);
 762
 763         tuple_set_u64(t, 0, cr->db_id);
 764         tuple_set_u64(t, 1, cr->thread->db_id);
 765         tuple_set_u64(t, 2, comm_db_id);
 766         tuple_set_u64(t, 3, cr->cp->db_id);
 767         tuple_set_u64(t, 4, cr->call_time);
 768         tuple_set_u64(t, 5, cr->return_time);
 769         tuple_set_u64(t, 6, cr->branch_count);
 770         tuple_set_u64(t, 7, cr->call_ref);
 771         tuple_set_u64(t, 8, cr->return_ref);
 772         tuple_set_u64(t, 9, cr->cp->parent->db_id);
 773         tuple_set_s32(t, 10, cr->flags);
 774
 775         call_object(tables->call_return_handler, t, "call_return_table");
 776
 777         Py_DECREF(t);
 778
 779         return 0;
 780 }
 781
 782 static int python_process_call_return(struct call_return *cr, void *data)
 783 {
 784         struct db_export *dbe = data;
 785
 786         return db_export__call_return(dbe, cr);
 787 }
 788
 789 static void python_process_general_event(struct perf_sample *sample,
 790                                          struct perf_evsel *evsel,
 791                                          struct addr_location *al)
 792 {
 793         PyObject *handler, *t, *dict, *callchain, *dict_sample;
 794         static char handler_name[64];
 795         unsigned n = 0;
 796
 797         /*
 798          * Use the MAX_FIELDS to make the function expandable, though
 799          * currently there is only one item for the tuple.
 800          */
 801         t = PyTuple_New(MAX_FIELDS);
 802         if (!t)
 803                 Py_FatalError("couldn't create Python tuple");
 804
 805         dict = PyDict_New();
 806         if (!dict)
 807                 Py_FatalError("couldn't create Python dictionary");
 808
 809         dict_sample = PyDict_New();
 810         if (!dict_sample)
 811                 Py_FatalError("couldn't create Python dictionary");
 812
 813         snprintf(handler_name, sizeof(handler_name), "%s", "process_event");
 814
 815         handler = get_handler(handler_name);
 816         if (!handler)
 817                 goto exit;
 818
 819         pydict_set_item_string_decref(dict, "ev_name", PyString_FromString(perf_evsel__name(evsel)));
 820         pydict_set_item_string_decref(dict, "attr", PyString_FromStringAndSize(
 821                         (const char *)&evsel->attr, sizeof(evsel->attr)));
 822
 823         pydict_set_item_string_decref(dict_sample, "pid",
 824                         PyInt_FromLong(sample->pid));
 825         pydict_set_item_string_decref(dict_sample, "tid",
 826                         PyInt_FromLong(sample->tid));
 827         pydict_set_item_string_decref(dict_sample, "cpu",
 828                         PyInt_FromLong(sample->cpu));
 829         pydict_set_item_string_decref(dict_sample, "ip",
 830                         PyLong_FromUnsignedLongLong(sample->ip));
 831         pydict_set_item_string_decref(dict_sample, "time",
 832                         PyLong_FromUnsignedLongLong(sample->time));
 833         pydict_set_item_string_decref(dict_sample, "period",
 834                         PyLong_FromUnsignedLongLong(sample->period));
 835         pydict_set_item_string_decref(dict, "sample", dict_sample);
 836
 837         pydict_set_item_string_decref(dict, "raw_buf", PyString_FromStringAndSize(
 838                         (const char *)sample->raw_data, sample->raw_size));
 839         pydict_set_item_string_decref(dict, "comm",
 840                         PyString_FromString(thread__comm_str(al->thread)));
 841         if (al->map) {
 842                 pydict_set_item_string_decref(dict, "dso",
 843                         PyString_FromString(al->map->dso->name));
 844         }
 845         if (al->sym) {
 846                 pydict_set_item_string_decref(dict, "symbol",
 847                         PyString_FromString(al->sym->name));
 848         }
 849
 850         /* ip unwinding */
 851         callchain = python_process_callchain(sample, evsel, al);
 852         pydict_set_item_string_decref(dict, "callchain", callchain);
 853
 854         PyTuple_SetItem(t, n++, dict);
 855         if (_PyTuple_Resize(&t, n) == -1)
 856                 Py_FatalError("error resizing Python tuple");
 857
 858         call_object(handler, t, handler_name);
 859 exit:
 860         Py_DECREF(dict);
 861         Py_DECREF(t);
 862 }
 863
 864 static void python_process_event(union perf_event *event,
 865                                  struct perf_sample *sample,
 866                                  struct perf_evsel *evsel,
 867                                  struct addr_location *al)
 868 {
 869         struct tables *tables = &tables_global;
 870
 871         switch (evsel->attr.type) {
 872         case PERF_TYPE_TRACEPOINT:
 873                 python_process_tracepoint(sample, evsel, al);
 874                 break;
 875         /* Reserve for future process_hw/sw/raw APIs */
 876         default:
 877                 if (tables->db_export_mode)
 878                         db_export__sample(&tables->dbe, event, sample, evsel, al);
 879                 else
 880                         python_process_general_event(sample, evsel, al);
 881         }
 882 }
 883
 884 static void get_handler_name(char *str, size_t size,
 885                              struct perf_evsel *evsel)
 886 {
 887         char *p = str;
 888
 889         scnprintf(str, size, "stat__%s", perf_evsel__name(evsel));
 890
 891         while ((p = strchr(p, ':'))) {
 892                 *p = '_';
 893                 p++;
 894         }
 895 }
 896
 897 static void
 898 process_stat(struct perf_evsel *counter, int cpu, int thread, u64 tstamp,
 899              struct perf_counts_values *count)
 900 {
 901         PyObject *handler, *t;
 902         static char handler_name[256];
 903         int n = 0;
 904
 905         t = PyTuple_New(MAX_FIELDS);
 906         if (!t)
 907                 Py_FatalError("couldn't create Python tuple");
 908
 909         get_handler_name(handler_name, sizeof(handler_name),
 910                          counter);
 911
 912         handler = get_handler(handler_name);
 913         if (!handler) {
 914                 pr_debug("can't find python handler %s\n", handler_name);
 915                 return;
 916         }
 917
 918         PyTuple_SetItem(t, n++, PyInt_FromLong(cpu));
 919         PyTuple_SetItem(t, n++, PyInt_FromLong(thread));
 920
 921         tuple_set_u64(t, n++, tstamp);
 922         tuple_set_u64(t, n++, count->val);
 923         tuple_set_u64(t, n++, count->ena);
 924         tuple_set_u64(t, n++, count->run);
 925
 926         if (_PyTuple_Resize(&t, n) == -1)
 927                 Py_FatalError("error resizing Python tuple");
 928
 929         call_object(handler, t, handler_name);
 930
 931         Py_DECREF(t);
 932 }
 933
 934 static void python_process_stat(struct perf_stat_config *config,
 935                                 struct perf_evsel *counter, u64 tstamp)
 936 {
 937         struct thread_map *threads = counter->threads;
 938         struct cpu_map *cpus = counter->cpus;
 939         int cpu, thread;
 940
 941         if (config->aggr_mode == AGGR_GLOBAL) {
 942                 process_stat(counter, -1, -1, tstamp,
 943                              &counter->counts->aggr);
 944                 return;
 945         }
 946
 947         for (thread = 0; thread < threads->nr; thread++) {
 948                 for (cpu = 0; cpu < cpus->nr; cpu++) {
 949                         process_stat(counter, cpus->map[cpu],
 950                                      thread_map__pid(threads, thread), tstamp,
 951                                      perf_counts(counter->counts, cpu, thread));
 952                 }
 953         }
 954 }
 955
 956 static void python_process_stat_interval(u64 tstamp)
 957 {
 958         PyObject *handler, *t;
 959         static const char handler_name[] = "stat__interval";
 960         int n = 0;
 961
 962         t = PyTuple_New(MAX_FIELDS);
 963         if (!t)
 964                 Py_FatalError("couldn't create Python tuple");
 965
 966         handler = get_handler(handler_name);
 967         if (!handler) {
 968                 pr_debug("can't find python handler %s\n", handler_name);
 969                 return;
 970         }
 971
 972         tuple_set_u64(t, n++, tstamp);
 973
 974         if (_PyTuple_Resize(&t, n) == -1)
 975                 Py_FatalError("error resizing Python tuple");
 976
 977         call_object(handler, t, handler_name);
 978
 979         Py_DECREF(t);
 980 }
 981
 982 static int run_start_sub(void)
 983 {
 984         main_module = PyImport_AddModule("__main__");
 985         if (main_module == NULL)
 986                 return -1;
 987         Py_INCREF(main_module);
 988
 989         main_dict = PyModule_GetDict(main_module);
 990         if (main_dict == NULL)
 991                 goto error;
 992         Py_INCREF(main_dict);
 993
 994         try_call_object("trace_begin", NULL);
 995
 996         return 0;
 997
 998 error:
 999         Py_XDECREF(main_dict);
1000         Py_XDECREF(main_module);
1001         return -1;
1002 }
1003
1004 #define SET_TABLE_HANDLER_(name, handler_name, table_name) do {         \
1005         tables->handler_name = get_handler(#table_name);                \
1006         if (tables->handler_name)                                       \
1007                 tables->dbe.export_ ## name = python_export_ ## name;   \
1008 } while (0)
1009
1010 #define SET_TABLE_HANDLER(name) \
1011         SET_TABLE_HANDLER_(name, name ## _handler, name ## _table)
1012
1013 static void set_table_handlers(struct tables *tables)
1014 {
1015         const char *perf_db_export_mode = "perf_db_export_mode";
1016         const char *perf_db_export_calls = "perf_db_export_calls";
1017         const char *perf_db_export_callchains = "perf_db_export_callchains";
1018         PyObject *db_export_mode, *db_export_calls, *db_export_callchains;
1019         bool export_calls = false;
1020         bool export_callchains = false;
1021         int ret;
1022
1023         memset(tables, 0, sizeof(struct tables));
1024         if (db_export__init(&tables->dbe))
1025                 Py_FatalError("failed to initialize export");
1026
1027         db_export_mode = PyDict_GetItemString(main_dict, perf_db_export_mode);
1028         if (!db_export_mode)
1029                 return;
1030
1031         ret = PyObject_IsTrue(db_export_mode);
1032         if (ret == -1)
1033                 handler_call_die(perf_db_export_mode);
1034         if (!ret)
1035                 return;
1036
1037         /* handle export calls */
1038         tables->dbe.crp = NULL;
1039         db_export_calls = PyDict_GetItemString(main_dict, perf_db_export_calls);
1040         if (db_export_calls) {
1041                 ret = PyObject_IsTrue(db_export_calls);
1042                 if (ret == -1)
1043                         handler_call_die(perf_db_export_calls);
1044                 export_calls = !!ret;
1045         }
1046
1047         if (export_calls) {
1048                 tables->dbe.crp =
1049                         call_return_processor__new(python_process_call_return,
1050                                                    &tables->dbe);
1051                 if (!tables->dbe.crp)
1052                         Py_FatalError("failed to create calls processor");
1053         }
1054
1055         /* handle export callchains */
1056         tables->dbe.cpr = NULL;
1057         db_export_callchains = PyDict_GetItemString(main_dict,
1058                                                     perf_db_export_callchains);
1059         if (db_export_callchains) {
1060                 ret = PyObject_IsTrue(db_export_callchains);
1061                 if (ret == -1)
1062                         handler_call_die(perf_db_export_callchains);
1063                 export_callchains = !!ret;
1064         }
1065
1066         if (export_callchains) {
1067                 /*
1068                  * Attempt to use the call path root from the call return
1069                  * processor, if the call return processor is in use. Otherwise,
1070                  * we allocate a new call path root. This prevents exporting
1071                  * duplicate call path ids when both are in use simultaniously.
1072                  */
1073                 if (tables->dbe.crp)
1074                         tables->dbe.cpr = tables->dbe.crp->cpr;
1075                 else
1076                         tables->dbe.cpr = call_path_root__new();
1077
1078                 if (!tables->dbe.cpr)
1079                         Py_FatalError("failed to create call path root");
1080         }
1081
1082         tables->db_export_mode = true;
1083         /*
1084          * Reserve per symbol space for symbol->db_id via symbol__priv()
1085          */
1086         symbol_conf.priv_size = sizeof(u64);
1087
1088         SET_TABLE_HANDLER(evsel);
1089         SET_TABLE_HANDLER(machine);
1090         SET_TABLE_HANDLER(thread);
1091         SET_TABLE_HANDLER(comm);
1092         SET_TABLE_HANDLER(comm_thread);
1093         SET_TABLE_HANDLER(dso);
1094         SET_TABLE_HANDLER(symbol);
1095         SET_TABLE_HANDLER(branch_type);
1096         SET_TABLE_HANDLER(sample);
1097         SET_TABLE_HANDLER(call_path);
1098         SET_TABLE_HANDLER(call_return);
1099 }
1100
1101 /*
1102  * Start trace script
1103  */
1104 static int python_start_script(const char *script, int argc, const char **argv)
1105 {
1106         struct tables *tables = &tables_global;
1107         const char **command_line;
1108         char buf[PATH_MAX];
1109         int i, err = 0;
1110         FILE *fp;
1111
1112         command_line = malloc((argc + 1) * sizeof(const char *));
1113         command_line[0] = script;
1114         for (i = 1; i < argc + 1; i++)
1115                 command_line[i] = argv[i - 1];
1116
1117         Py_Initialize();
1118
1119         initperf_trace_context();
1120
1121         PySys_SetArgv(argc + 1, (char **)command_line);
1122
1123         fp = fopen(script, "r");
1124         if (!fp) {
1125                 sprintf(buf, "Can't open python script \"%s\"", script);
1126                 perror(buf);
1127                 err = -1;
1128                 goto error;
1129         }
1130
1131         err = PyRun_SimpleFile(fp, script);
1132         if (err) {
1133                 fprintf(stderr, "Error running python script %s\n", script);
1134                 goto error;
1135         }
1136
1137         err = run_start_sub();
1138         if (err) {
1139                 fprintf(stderr, "Error starting python script %s\n", script);
1140                 goto error;
1141         }
1142
1143         set_table_handlers(tables);
1144
1145         if (tables->db_export_mode) {
1146                 err = db_export__branch_types(&tables->dbe);
1147                 if (err)
1148                         goto error;
1149         }
1150
1151         free(command_line);
1152
1153         return err;
1154 error:
1155         Py_Finalize();
1156         free(command_line);
1157
1158         return err;
1159 }
1160
1161 static int python_flush_script(void)
1162 {
1163         struct tables *tables = &tables_global;
1164
1165         return db_export__flush(&tables->dbe);
1166 }
1167
1168 /*
1169  * Stop trace script
1170  */
1171 static int python_stop_script(void)
1172 {
1173         struct tables *tables = &tables_global;
1174
1175         try_call_object("trace_end", NULL);
1176
1177         db_export__exit(&tables->dbe);
1178
1179         Py_XDECREF(main_dict);
1180         Py_XDECREF(main_module);
1181         Py_Finalize();
1182
1183         return 0;
1184 }
1185
1186 static int python_generate_script(struct pevent *pevent, const char *outfile)
1187 {
1188         struct event_format *event = NULL;
1189         struct format_field *f;
1190         char fname[PATH_MAX];
1191         int not_first, count;
1192         FILE *ofp;
1193
1194         sprintf(fname, "%s.py", outfile);
1195         ofp = fopen(fname, "w");
1196         if (ofp == NULL) {
1197                 fprintf(stderr, "couldn't open %s\n", fname);
1198                 return -1;
1199         }
1200         fprintf(ofp, "# perf script event handlers, "
1201                 "generated by perf script -g python\n");
1202
1203         fprintf(ofp, "# Licensed under the terms of the GNU GPL"
1204                 " License version 2\n\n");
1205
1206         fprintf(ofp, "# The common_* event handler fields are the most useful "
1207                 "fields common to\n");
1208
1209         fprintf(ofp, "# all events.  They don't necessarily correspond to "
1210                 "the 'common_*' fields\n");
1211
1212         fprintf(ofp, "# in the format files.  Those fields not available as "
1213                 "handler params can\n");
1214
1215         fprintf(ofp, "# be retrieved using Python functions of the form "
1216                 "common_*(context).\n");
1217
1218         fprintf(ofp, "# See the perf-trace-python Documentation for the list "
1219                 "of available functions.\n\n");
1220
1221         fprintf(ofp, "import os\n");
1222         fprintf(ofp, "import sys\n\n");
1223
1224         fprintf(ofp, "sys.path.append(os.environ['PERF_EXEC_PATH'] + \\\n");
1225         fprintf(ofp, "\t'/scripts/python/Perf-Trace-Util/lib/Perf/Trace')\n");
1226         fprintf(ofp, "\nfrom perf_trace_context import *\n");
1227         fprintf(ofp, "from Core import *\n\n\n");
1228
1229         fprintf(ofp, "def trace_begin():\n");
1230         fprintf(ofp, "\tprint \"in trace_begin\"\n\n");
1231
1232         fprintf(ofp, "def trace_end():\n");
1233         fprintf(ofp, "\tprint \"in trace_end\"\n\n");
1234
1235         while ((event = trace_find_next_event(pevent, event))) {
1236                 fprintf(ofp, "def %s__%s(", event->system, event->name);
1237                 fprintf(ofp, "event_name, ");
1238                 fprintf(ofp, "context, ");
1239                 fprintf(ofp, "common_cpu,\n");
1240                 fprintf(ofp, "\tcommon_secs, ");
1241                 fprintf(ofp, "common_nsecs, ");
1242                 fprintf(ofp, "common_pid, ");
1243                 fprintf(ofp, "common_comm,\n\t");
1244                 fprintf(ofp, "common_callchain, ");
1245
1246                 not_first = 0;
1247                 count = 0;
1248
1249                 for (f = event->format.fields; f; f = f->next) {
1250                         if (not_first++)
1251                                 fprintf(ofp, ", ");
1252                         if (++count % 5 == 0)
1253                                 fprintf(ofp, "\n\t");
1254
1255                         fprintf(ofp, "%s", f->name);
1256                 }
1257                 fprintf(ofp, "):\n");
1258
1259                 fprintf(ofp, "\t\tprint_header(event_name, common_cpu, "
1260                         "common_secs, common_nsecs,\n\t\t\t"
1261                         "common_pid, common_comm)\n\n");
1262
1263                 fprintf(ofp, "\t\tprint \"");
1264
1265                 not_first = 0;
1266                 count = 0;
1267
1268                 for (f = event->format.fields; f; f = f->next) {
1269                         if (not_first++)
1270                                 fprintf(ofp, ", ");
1271                         if (count && count % 3 == 0) {
1272                                 fprintf(ofp, "\" \\\n\t\t\"");
1273                         }
1274                         count++;
1275
1276                         fprintf(ofp, "%s=", f->name);
1277                         if (f->flags & FIELD_IS_STRING ||
1278                             f->flags & FIELD_IS_FLAG ||
1279                             f->flags & FIELD_IS_ARRAY ||
1280                             f->flags & FIELD_IS_SYMBOLIC)
1281                                 fprintf(ofp, "%%s");
1282                         else if (f->flags & FIELD_IS_SIGNED)
1283                                 fprintf(ofp, "%%d");
1284                         else
1285                                 fprintf(ofp, "%%u");
1286                 }
1287
1288                 fprintf(ofp, "\" %% \\\n\t\t(");
1289
1290                 not_first = 0;
1291                 count = 0;
1292
1293                 for (f = event->format.fields; f; f = f->next) {
1294                         if (not_first++)
1295                                 fprintf(ofp, ", ");
1296
1297                         if (++count % 5 == 0)
1298                                 fprintf(ofp, "\n\t\t");
1299
1300                         if (f->flags & FIELD_IS_FLAG) {
1301                                 if ((count - 1) % 5 != 0) {
1302                                         fprintf(ofp, "\n\t\t");
1303                                         count = 4;
1304                                 }
1305                                 fprintf(ofp, "flag_str(\"");
1306                                 fprintf(ofp, "%s__%s\", ", event->system,
1307                                         event->name);
1308                                 fprintf(ofp, "\"%s\", %s)", f->name,
1309                                         f->name);
1310                         } else if (f->flags & FIELD_IS_SYMBOLIC) {
1311                                 if ((count - 1) % 5 != 0) {
1312                                         fprintf(ofp, "\n\t\t");
1313                                         count = 4;
1314                                 }
1315                                 fprintf(ofp, "symbol_str(\"");
1316                                 fprintf(ofp, "%s__%s\", ", event->system,
1317                                         event->name);
1318                                 fprintf(ofp, "\"%s\", %s)", f->name,
1319                                         f->name);
1320                         } else
1321                                 fprintf(ofp, "%s", f->name);
1322                 }
1323
1324                 fprintf(ofp, ")\n\n");
1325
1326                 fprintf(ofp, "\t\tfor node in common_callchain:");
1327                 fprintf(ofp, "\n\t\t\tif 'sym' in node:");
1328                 fprintf(ofp, "\n\t\t\t\tprint \"\\t[%%x] %%s\" %% (node['ip'], node['sym']['name'])");
1329                 fprintf(ofp, "\n\t\t\telse:");
1330                 fprintf(ofp, "\n\t\t\t\tprint \"\t[%%x]\" %% (node['ip'])\n\n");
1331                 fprintf(ofp, "\t\tprint \"\\n\"\n\n");
1332
1333         }
1334
1335         fprintf(ofp, "def trace_unhandled(event_name, context, "
1336                 "event_fields_dict):\n");
1337
1338         fprintf(ofp, "\t\tprint ' '.join(['%%s=%%s'%%(k,str(v))"
1339                 "for k,v in sorted(event_fields_dict.items())])\n\n");
1340
1341         fprintf(ofp, "def print_header("
1342                 "event_name, cpu, secs, nsecs, pid, comm):\n"
1343                 "\tprint \"%%-20s %%5u %%05u.%%09u %%8u %%-20s \" %% \\\n\t"
1344                 "(event_name, cpu, secs, nsecs, pid, comm),\n");
1345
1346         fclose(ofp);
1347
1348         fprintf(stderr, "generated Python script: %s\n", fname);
1349
1350         return 0;
1351 }
1352
1353 struct scripting_ops python_scripting_ops = {
1354         .name                   = "Python",
1355         .start_script           = python_start_script,
1356         .flush_script           = python_flush_script,
1357         .stop_script            = python_stop_script,
1358         .process_event          = python_process_event,
1359         .process_stat           = python_process_stat,
1360         .process_stat_interval  = python_process_stat_interval,
1361         .generate_script        = python_generate_script,
1362 };