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 <tzanussi@gmail.com>
   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, *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
 390 static void python_process_tracepoint(struct perf_sample *sample,
 391                                       struct perf_evsel *evsel,
 392                                       struct addr_location *al)
 393 {
 394         struct event_format *event = evsel->tp_format;
 395         PyObject *handler, *context, *t, *obj, *callchain;
 396         PyObject *dict = NULL;
 397         static char handler_name[256];
 398         struct format_field *field;
 399         unsigned long s, ns;
 400         unsigned n = 0;
 401         int pid;
 402         int cpu = sample->cpu;
 403         void *data = sample->raw_data;
 404         unsigned long long nsecs = sample->time;
 405         const char *comm = thread__comm_str(al->thread);
 406
 407         t = PyTuple_New(MAX_FIELDS);
 408         if (!t)
 409                 Py_FatalError("couldn't create Python tuple");
 410
 411         if (!event) {
 412                 snprintf(handler_name, sizeof(handler_name),
 413                          "ug! no event found for type %" PRIu64, (u64)evsel->attr.config);
 414                 Py_FatalError(handler_name);
 415         }
 416
 417         pid = raw_field_value(event, "common_pid", data);
 418
 419         sprintf(handler_name, "%s__%s", event->system, event->name);
 420
 421         if (!test_and_set_bit(event->id, events_defined))
 422                 define_event_symbols(event, handler_name, event->print_fmt.args);
 423
 424         handler = get_handler(handler_name);
 425         if (!handler) {
 426                 dict = PyDict_New();
 427                 if (!dict)
 428                         Py_FatalError("couldn't create Python dict");
 429         }
 430         s = nsecs / NSECS_PER_SEC;
 431         ns = nsecs - s * NSECS_PER_SEC;
 432
 433         scripting_context->event_data = data;
 434         scripting_context->pevent = evsel->tp_format->pevent;
 435
 436         context = PyCObject_FromVoidPtr(scripting_context, NULL);
 437
 438         PyTuple_SetItem(t, n++, PyString_FromString(handler_name));
 439         PyTuple_SetItem(t, n++, context);
 440
 441         /* ip unwinding */
 442         callchain = python_process_callchain(sample, evsel, al);
 443
 444         if (handler) {
 445                 PyTuple_SetItem(t, n++, PyInt_FromLong(cpu));
 446                 PyTuple_SetItem(t, n++, PyInt_FromLong(s));
 447                 PyTuple_SetItem(t, n++, PyInt_FromLong(ns));
 448                 PyTuple_SetItem(t, n++, PyInt_FromLong(pid));
 449                 PyTuple_SetItem(t, n++, PyString_FromString(comm));
 450                 PyTuple_SetItem(t, n++, callchain);
 451         } else {
 452                 pydict_set_item_string_decref(dict, "common_cpu", PyInt_FromLong(cpu));
 453                 pydict_set_item_string_decref(dict, "common_s", PyInt_FromLong(s));
 454                 pydict_set_item_string_decref(dict, "common_ns", PyInt_FromLong(ns));
 455                 pydict_set_item_string_decref(dict, "common_pid", PyInt_FromLong(pid));
 456                 pydict_set_item_string_decref(dict, "common_comm", PyString_FromString(comm));
 457                 pydict_set_item_string_decref(dict, "common_callchain", callchain);
 458         }
 459         for (field = event->format.fields; field; field = field->next) {
 460                 if (field->flags & FIELD_IS_STRING) {
 461                         int offset;
 462                         if (field->flags & FIELD_IS_DYNAMIC) {
 463                                 offset = *(int *)(data + field->offset);
 464                                 offset &= 0xffff;
 465                         } else
 466                                 offset = field->offset;
 467                         obj = PyString_FromString((char *)data + offset);
 468                 } else { /* FIELD_IS_NUMERIC */
 469                         obj = get_field_numeric_entry(event, field, data);
 470                 }
 471                 if (handler)
 472                         PyTuple_SetItem(t, n++, obj);
 473                 else
 474                         pydict_set_item_string_decref(dict, field->name, obj);
 475
 476         }
 477
 478         if (!handler)
 479                 PyTuple_SetItem(t, n++, dict);
 480
 481         if (_PyTuple_Resize(&t, n) == -1)
 482                 Py_FatalError("error resizing Python tuple");
 483
 484         if (handler) {
 485                 call_object(handler, t, handler_name);
 486         } else {
 487                 try_call_object("trace_unhandled", t);
 488                 Py_DECREF(dict);
 489         }
 490
 491         Py_DECREF(t);
 492 }
 493
 494 static PyObject *tuple_new(unsigned int sz)
 495 {
 496         PyObject *t;
 497
 498         t = PyTuple_New(sz);
 499         if (!t)
 500                 Py_FatalError("couldn't create Python tuple");
 501         return t;
 502 }
 503
 504 static int tuple_set_u64(PyObject *t, unsigned int pos, u64 val)
 505 {
 506 #if BITS_PER_LONG == 64
 507         return PyTuple_SetItem(t, pos, PyInt_FromLong(val));
 508 #endif
 509 #if BITS_PER_LONG == 32
 510         return PyTuple_SetItem(t, pos, PyLong_FromLongLong(val));
 511 #endif
 512 }
 513
 514 static int tuple_set_s32(PyObject *t, unsigned int pos, s32 val)
 515 {
 516         return PyTuple_SetItem(t, pos, PyInt_FromLong(val));
 517 }
 518
 519 static int tuple_set_string(PyObject *t, unsigned int pos, const char *s)
 520 {
 521         return PyTuple_SetItem(t, pos, PyString_FromString(s));
 522 }
 523
 524 static int python_export_evsel(struct db_export *dbe, struct perf_evsel *evsel)
 525 {
 526         struct tables *tables = container_of(dbe, struct tables, dbe);
 527         PyObject *t;
 528
 529         t = tuple_new(2);
 530
 531         tuple_set_u64(t, 0, evsel->db_id);
 532         tuple_set_string(t, 1, perf_evsel__name(evsel));
 533
 534         call_object(tables->evsel_handler, t, "evsel_table");
 535
 536         Py_DECREF(t);
 537
 538         return 0;
 539 }
 540
 541 static int python_export_machine(struct db_export *dbe,
 542                                  struct machine *machine)
 543 {
 544         struct tables *tables = container_of(dbe, struct tables, dbe);
 545         PyObject *t;
 546
 547         t = tuple_new(3);
 548
 549         tuple_set_u64(t, 0, machine->db_id);
 550         tuple_set_s32(t, 1, machine->pid);
 551         tuple_set_string(t, 2, machine->root_dir ? machine->root_dir : "");
 552
 553         call_object(tables->machine_handler, t, "machine_table");
 554
 555         Py_DECREF(t);
 556
 557         return 0;
 558 }
 559
 560 static int python_export_thread(struct db_export *dbe, struct thread *thread,
 561                                 u64 main_thread_db_id, struct machine *machine)
 562 {
 563         struct tables *tables = container_of(dbe, struct tables, dbe);
 564         PyObject *t;
 565
 566         t = tuple_new(5);
 567
 568         tuple_set_u64(t, 0, thread->db_id);
 569         tuple_set_u64(t, 1, machine->db_id);
 570         tuple_set_u64(t, 2, main_thread_db_id);
 571         tuple_set_s32(t, 3, thread->pid_);
 572         tuple_set_s32(t, 4, thread->tid);
 573
 574         call_object(tables->thread_handler, t, "thread_table");
 575
 576         Py_DECREF(t);
 577
 578         return 0;
 579 }
 580
 581 static int python_export_comm(struct db_export *dbe, struct comm *comm)
 582 {
 583         struct tables *tables = container_of(dbe, struct tables, dbe);
 584         PyObject *t;
 585
 586         t = tuple_new(2);
 587
 588         tuple_set_u64(t, 0, comm->db_id);
 589         tuple_set_string(t, 1, comm__str(comm));
 590
 591         call_object(tables->comm_handler, t, "comm_table");
 592
 593         Py_DECREF(t);
 594
 595         return 0;
 596 }
 597
 598 static int python_export_comm_thread(struct db_export *dbe, u64 db_id,
 599                                      struct comm *comm, struct thread *thread)
 600 {
 601         struct tables *tables = container_of(dbe, struct tables, dbe);
 602         PyObject *t;
 603
 604         t = tuple_new(3);
 605
 606         tuple_set_u64(t, 0, db_id);
 607         tuple_set_u64(t, 1, comm->db_id);
 608         tuple_set_u64(t, 2, thread->db_id);
 609
 610         call_object(tables->comm_thread_handler, t, "comm_thread_table");
 611
 612         Py_DECREF(t);
 613
 614         return 0;
 615 }
 616
 617 static int python_export_dso(struct db_export *dbe, struct dso *dso,
 618                              struct machine *machine)
 619 {
 620         struct tables *tables = container_of(dbe, struct tables, dbe);
 621         char sbuild_id[SBUILD_ID_SIZE];
 622         PyObject *t;
 623
 624         build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id);
 625
 626         t = tuple_new(5);
 627
 628         tuple_set_u64(t, 0, dso->db_id);
 629         tuple_set_u64(t, 1, machine->db_id);
 630         tuple_set_string(t, 2, dso->short_name);
 631         tuple_set_string(t, 3, dso->long_name);
 632         tuple_set_string(t, 4, sbuild_id);
 633
 634         call_object(tables->dso_handler, t, "dso_table");
 635
 636         Py_DECREF(t);
 637
 638         return 0;
 639 }
 640
 641 static int python_export_symbol(struct db_export *dbe, struct symbol *sym,
 642                                 struct dso *dso)
 643 {
 644         struct tables *tables = container_of(dbe, struct tables, dbe);
 645         u64 *sym_db_id = symbol__priv(sym);
 646         PyObject *t;
 647
 648         t = tuple_new(6);
 649
 650         tuple_set_u64(t, 0, *sym_db_id);
 651         tuple_set_u64(t, 1, dso->db_id);
 652         tuple_set_u64(t, 2, sym->start);
 653         tuple_set_u64(t, 3, sym->end);
 654         tuple_set_s32(t, 4, sym->binding);
 655         tuple_set_string(t, 5, sym->name);
 656
 657         call_object(tables->symbol_handler, t, "symbol_table");
 658
 659         Py_DECREF(t);
 660
 661         return 0;
 662 }
 663
 664 static int python_export_branch_type(struct db_export *dbe, u32 branch_type,
 665                                      const char *name)
 666 {
 667         struct tables *tables = container_of(dbe, struct tables, dbe);
 668         PyObject *t;
 669
 670         t = tuple_new(2);
 671
 672         tuple_set_s32(t, 0, branch_type);
 673         tuple_set_string(t, 1, name);
 674
 675         call_object(tables->branch_type_handler, t, "branch_type_table");
 676
 677         Py_DECREF(t);
 678
 679         return 0;
 680 }
 681
 682 static int python_export_sample(struct db_export *dbe,
 683                                 struct export_sample *es)
 684 {
 685         struct tables *tables = container_of(dbe, struct tables, dbe);
 686         PyObject *t;
 687
 688         t = tuple_new(22);
 689
 690         tuple_set_u64(t, 0, es->db_id);
 691         tuple_set_u64(t, 1, es->evsel->db_id);
 692         tuple_set_u64(t, 2, es->al->machine->db_id);
 693         tuple_set_u64(t, 3, es->al->thread->db_id);
 694         tuple_set_u64(t, 4, es->comm_db_id);
 695         tuple_set_u64(t, 5, es->dso_db_id);
 696         tuple_set_u64(t, 6, es->sym_db_id);
 697         tuple_set_u64(t, 7, es->offset);
 698         tuple_set_u64(t, 8, es->sample->ip);
 699         tuple_set_u64(t, 9, es->sample->time);
 700         tuple_set_s32(t, 10, es->sample->cpu);
 701         tuple_set_u64(t, 11, es->addr_dso_db_id);
 702         tuple_set_u64(t, 12, es->addr_sym_db_id);
 703         tuple_set_u64(t, 13, es->addr_offset);
 704         tuple_set_u64(t, 14, es->sample->addr);
 705         tuple_set_u64(t, 15, es->sample->period);
 706         tuple_set_u64(t, 16, es->sample->weight);
 707         tuple_set_u64(t, 17, es->sample->transaction);
 708         tuple_set_u64(t, 18, es->sample->data_src);
 709         tuple_set_s32(t, 19, es->sample->flags & PERF_BRANCH_MASK);
 710         tuple_set_s32(t, 20, !!(es->sample->flags & PERF_IP_FLAG_IN_TX));
 711         tuple_set_u64(t, 21, es->call_path_id);
 712
 713         call_object(tables->sample_handler, t, "sample_table");
 714
 715         Py_DECREF(t);
 716
 717         return 0;
 718 }
 719
 720 static int python_export_call_path(struct db_export *dbe, struct call_path *cp)
 721 {
 722         struct tables *tables = container_of(dbe, struct tables, dbe);
 723         PyObject *t;
 724         u64 parent_db_id, sym_db_id;
 725
 726         parent_db_id = cp->parent ? cp->parent->db_id : 0;
 727         sym_db_id = cp->sym ? *(u64 *)symbol__priv(cp->sym) : 0;
 728
 729         t = tuple_new(4);
 730
 731         tuple_set_u64(t, 0, cp->db_id);
 732         tuple_set_u64(t, 1, parent_db_id);
 733         tuple_set_u64(t, 2, sym_db_id);
 734         tuple_set_u64(t, 3, cp->ip);
 735
 736         call_object(tables->call_path_handler, t, "call_path_table");
 737
 738         Py_DECREF(t);
 739
 740         return 0;
 741 }
 742
 743 static int python_export_call_return(struct db_export *dbe,
 744                                      struct call_return *cr)
 745 {
 746         struct tables *tables = container_of(dbe, struct tables, dbe);
 747         u64 comm_db_id = cr->comm ? cr->comm->db_id : 0;
 748         PyObject *t;
 749
 750         t = tuple_new(11);
 751
 752         tuple_set_u64(t, 0, cr->db_id);
 753         tuple_set_u64(t, 1, cr->thread->db_id);
 754         tuple_set_u64(t, 2, comm_db_id);
 755         tuple_set_u64(t, 3, cr->cp->db_id);
 756         tuple_set_u64(t, 4, cr->call_time);
 757         tuple_set_u64(t, 5, cr->return_time);
 758         tuple_set_u64(t, 6, cr->branch_count);
 759         tuple_set_u64(t, 7, cr->call_ref);
 760         tuple_set_u64(t, 8, cr->return_ref);
 761         tuple_set_u64(t, 9, cr->cp->parent->db_id);
 762         tuple_set_s32(t, 10, cr->flags);
 763
 764         call_object(tables->call_return_handler, t, "call_return_table");
 765
 766         Py_DECREF(t);
 767
 768         return 0;
 769 }
 770
 771 static int python_process_call_return(struct call_return *cr, void *data)
 772 {
 773         struct db_export *dbe = data;
 774
 775         return db_export__call_return(dbe, cr);
 776 }
 777
 778 static void python_process_general_event(struct perf_sample *sample,
 779                                          struct perf_evsel *evsel,
 780                                          struct addr_location *al)
 781 {
 782         PyObject *handler, *t, *dict, *callchain, *dict_sample;
 783         static char handler_name[64];
 784         unsigned n = 0;
 785
 786         /*
 787          * Use the MAX_FIELDS to make the function expandable, though
 788          * currently there is only one item for the tuple.
 789          */
 790         t = PyTuple_New(MAX_FIELDS);
 791         if (!t)
 792                 Py_FatalError("couldn't create Python tuple");
 793
 794         dict = PyDict_New();
 795         if (!dict)
 796                 Py_FatalError("couldn't create Python dictionary");
 797
 798         dict_sample = PyDict_New();
 799         if (!dict_sample)
 800                 Py_FatalError("couldn't create Python dictionary");
 801
 802         snprintf(handler_name, sizeof(handler_name), "%s", "process_event");
 803
 804         handler = get_handler(handler_name);
 805         if (!handler)
 806                 goto exit;
 807
 808         pydict_set_item_string_decref(dict, "ev_name", PyString_FromString(perf_evsel__name(evsel)));
 809         pydict_set_item_string_decref(dict, "attr", PyString_FromStringAndSize(
 810                         (const char *)&evsel->attr, sizeof(evsel->attr)));
 811
 812         pydict_set_item_string_decref(dict_sample, "pid",
 813                         PyInt_FromLong(sample->pid));
 814         pydict_set_item_string_decref(dict_sample, "tid",
 815                         PyInt_FromLong(sample->tid));
 816         pydict_set_item_string_decref(dict_sample, "cpu",
 817                         PyInt_FromLong(sample->cpu));
 818         pydict_set_item_string_decref(dict_sample, "ip",
 819                         PyLong_FromUnsignedLongLong(sample->ip));
 820         pydict_set_item_string_decref(dict_sample, "time",
 821                         PyLong_FromUnsignedLongLong(sample->time));
 822         pydict_set_item_string_decref(dict_sample, "period",
 823                         PyLong_FromUnsignedLongLong(sample->period));
 824         pydict_set_item_string_decref(dict, "sample", dict_sample);
 825
 826         pydict_set_item_string_decref(dict, "raw_buf", PyString_FromStringAndSize(
 827                         (const char *)sample->raw_data, sample->raw_size));
 828         pydict_set_item_string_decref(dict, "comm",
 829                         PyString_FromString(thread__comm_str(al->thread)));
 830         if (al->map) {
 831                 pydict_set_item_string_decref(dict, "dso",
 832                         PyString_FromString(al->map->dso->name));
 833         }
 834         if (al->sym) {
 835                 pydict_set_item_string_decref(dict, "symbol",
 836                         PyString_FromString(al->sym->name));
 837         }
 838
 839         /* ip unwinding */
 840         callchain = python_process_callchain(sample, evsel, al);
 841         pydict_set_item_string_decref(dict, "callchain", callchain);
 842
 843         PyTuple_SetItem(t, n++, dict);
 844         if (_PyTuple_Resize(&t, n) == -1)
 845                 Py_FatalError("error resizing Python tuple");
 846
 847         call_object(handler, t, handler_name);
 848 exit:
 849         Py_DECREF(dict);
 850         Py_DECREF(t);
 851 }
 852
 853 static void python_process_event(union perf_event *event,
 854                                  struct perf_sample *sample,
 855                                  struct perf_evsel *evsel,
 856                                  struct addr_location *al)
 857 {
 858         struct tables *tables = &tables_global;
 859
 860         switch (evsel->attr.type) {
 861         case PERF_TYPE_TRACEPOINT:
 862                 python_process_tracepoint(sample, evsel, al);
 863                 break;
 864         /* Reserve for future process_hw/sw/raw APIs */
 865         default:
 866                 if (tables->db_export_mode)
 867                         db_export__sample(&tables->dbe, event, sample, evsel, al);
 868                 else
 869                         python_process_general_event(sample, evsel, al);
 870         }
 871 }
 872
 873 static void get_handler_name(char *str, size_t size,
 874                              struct perf_evsel *evsel)
 875 {
 876         char *p = str;
 877
 878         scnprintf(str, size, "stat__%s", perf_evsel__name(evsel));
 879
 880         while ((p = strchr(p, ':'))) {
 881                 *p = '_';
 882                 p++;
 883         }
 884 }
 885
 886 static void
 887 process_stat(struct perf_evsel *counter, int cpu, int thread, u64 tstamp,
 888              struct perf_counts_values *count)
 889 {
 890         PyObject *handler, *t;
 891         static char handler_name[256];
 892         int n = 0;
 893
 894         t = PyTuple_New(MAX_FIELDS);
 895         if (!t)
 896                 Py_FatalError("couldn't create Python tuple");
 897
 898         get_handler_name(handler_name, sizeof(handler_name),
 899                          counter);
 900
 901         handler = get_handler(handler_name);
 902         if (!handler) {
 903                 pr_debug("can't find python handler %s\n", handler_name);
 904                 return;
 905         }
 906
 907         PyTuple_SetItem(t, n++, PyInt_FromLong(cpu));
 908         PyTuple_SetItem(t, n++, PyInt_FromLong(thread));
 909
 910         tuple_set_u64(t, n++, tstamp);
 911         tuple_set_u64(t, n++, count->val);
 912         tuple_set_u64(t, n++, count->ena);
 913         tuple_set_u64(t, n++, count->run);
 914
 915         if (_PyTuple_Resize(&t, n) == -1)
 916                 Py_FatalError("error resizing Python tuple");
 917
 918         call_object(handler, t, handler_name);
 919
 920         Py_DECREF(t);
 921 }
 922
 923 static void python_process_stat(struct perf_stat_config *config,
 924                                 struct perf_evsel *counter, u64 tstamp)
 925 {
 926         struct thread_map *threads = counter->threads;
 927         struct cpu_map *cpus = counter->cpus;
 928         int cpu, thread;
 929
 930         if (config->aggr_mode == AGGR_GLOBAL) {
 931                 process_stat(counter, -1, -1, tstamp,
 932                              &counter->counts->aggr);
 933                 return;
 934         }
 935
 936         for (thread = 0; thread < threads->nr; thread++) {
 937                 for (cpu = 0; cpu < cpus->nr; cpu++) {
 938                         process_stat(counter, cpus->map[cpu],
 939                                      thread_map__pid(threads, thread), tstamp,
 940                                      perf_counts(counter->counts, cpu, thread));
 941                 }
 942         }
 943 }
 944
 945 static void python_process_stat_interval(u64 tstamp)
 946 {
 947         PyObject *handler, *t;
 948         static const char handler_name[] = "stat__interval";
 949         int n = 0;
 950
 951         t = PyTuple_New(MAX_FIELDS);
 952         if (!t)
 953                 Py_FatalError("couldn't create Python tuple");
 954
 955         handler = get_handler(handler_name);
 956         if (!handler) {
 957                 pr_debug("can't find python handler %s\n", handler_name);
 958                 return;
 959         }
 960
 961         tuple_set_u64(t, n++, tstamp);
 962
 963         if (_PyTuple_Resize(&t, n) == -1)
 964                 Py_FatalError("error resizing Python tuple");
 965
 966         call_object(handler, t, handler_name);
 967
 968         Py_DECREF(t);
 969 }
 970
 971 static int run_start_sub(void)
 972 {
 973         main_module = PyImport_AddModule("__main__");
 974         if (main_module == NULL)
 975                 return -1;
 976         Py_INCREF(main_module);
 977
 978         main_dict = PyModule_GetDict(main_module);
 979         if (main_dict == NULL)
 980                 goto error;
 981         Py_INCREF(main_dict);
 982
 983         try_call_object("trace_begin", NULL);
 984
 985         return 0;
 986
 987 error:
 988         Py_XDECREF(main_dict);
 989         Py_XDECREF(main_module);
 990         return -1;
 991 }
 992
 993 #define SET_TABLE_HANDLER_(name, handler_name, table_name) do {         \
 994         tables->handler_name = get_handler(#table_name);                \
 995         if (tables->handler_name)                                       \
 996                 tables->dbe.export_ ## name = python_export_ ## name;   \
 997 } while (0)
 998
 999 #define SET_TABLE_HANDLER(name) \
1000         SET_TABLE_HANDLER_(name, name ## _handler, name ## _table)
1001
1002 static void set_table_handlers(struct tables *tables)
1003 {
1004         const char *perf_db_export_mode = "perf_db_export_mode";
1005         const char *perf_db_export_calls = "perf_db_export_calls";
1006         const char *perf_db_export_callchains = "perf_db_export_callchains";
1007         PyObject *db_export_mode, *db_export_calls, *db_export_callchains;
1008         bool export_calls = false;
1009         bool export_callchains = false;
1010         int ret;
1011
1012         memset(tables, 0, sizeof(struct tables));
1013         if (db_export__init(&tables->dbe))
1014                 Py_FatalError("failed to initialize export");
1015
1016         db_export_mode = PyDict_GetItemString(main_dict, perf_db_export_mode);
1017         if (!db_export_mode)
1018                 return;
1019
1020         ret = PyObject_IsTrue(db_export_mode);
1021         if (ret == -1)
1022                 handler_call_die(perf_db_export_mode);
1023         if (!ret)
1024                 return;
1025
1026         /* handle export calls */
1027         tables->dbe.crp = NULL;
1028         db_export_calls = PyDict_GetItemString(main_dict, perf_db_export_calls);
1029         if (db_export_calls) {
1030                 ret = PyObject_IsTrue(db_export_calls);
1031                 if (ret == -1)
1032                         handler_call_die(perf_db_export_calls);
1033                 export_calls = !!ret;
1034         }
1035
1036         if (export_calls) {
1037                 tables->dbe.crp =
1038                         call_return_processor__new(python_process_call_return,
1039                                                    &tables->dbe);
1040                 if (!tables->dbe.crp)
1041                         Py_FatalError("failed to create calls processor");
1042         }
1043
1044         /* handle export callchains */
1045         tables->dbe.cpr = NULL;
1046         db_export_callchains = PyDict_GetItemString(main_dict,
1047                                                     perf_db_export_callchains);
1048         if (db_export_callchains) {
1049                 ret = PyObject_IsTrue(db_export_callchains);
1050                 if (ret == -1)
1051                         handler_call_die(perf_db_export_callchains);
1052                 export_callchains = !!ret;
1053         }
1054
1055         if (export_callchains) {
1056                 /*
1057                  * Attempt to use the call path root from the call return
1058                  * processor, if the call return processor is in use. Otherwise,
1059                  * we allocate a new call path root. This prevents exporting
1060                  * duplicate call path ids when both are in use simultaniously.
1061                  */
1062                 if (tables->dbe.crp)
1063                         tables->dbe.cpr = tables->dbe.crp->cpr;
1064                 else
1065                         tables->dbe.cpr = call_path_root__new();
1066
1067                 if (!tables->dbe.cpr)
1068                         Py_FatalError("failed to create call path root");
1069         }
1070
1071         tables->db_export_mode = true;
1072         /*
1073          * Reserve per symbol space for symbol->db_id via symbol__priv()
1074          */
1075         symbol_conf.priv_size = sizeof(u64);
1076
1077         SET_TABLE_HANDLER(evsel);
1078         SET_TABLE_HANDLER(machine);
1079         SET_TABLE_HANDLER(thread);
1080         SET_TABLE_HANDLER(comm);
1081         SET_TABLE_HANDLER(comm_thread);
1082         SET_TABLE_HANDLER(dso);
1083         SET_TABLE_HANDLER(symbol);
1084         SET_TABLE_HANDLER(branch_type);
1085         SET_TABLE_HANDLER(sample);
1086         SET_TABLE_HANDLER(call_path);
1087         SET_TABLE_HANDLER(call_return);
1088 }
1089
1090 /*
1091  * Start trace script
1092  */
1093 static int python_start_script(const char *script, int argc, const char **argv)
1094 {
1095         struct tables *tables = &tables_global;
1096         const char **command_line;
1097         char buf[PATH_MAX];
1098         int i, err = 0;
1099         FILE *fp;
1100
1101         command_line = malloc((argc + 1) * sizeof(const char *));
1102         command_line[0] = script;
1103         for (i = 1; i < argc + 1; i++)
1104                 command_line[i] = argv[i - 1];
1105
1106         Py_Initialize();
1107
1108         initperf_trace_context();
1109
1110         PySys_SetArgv(argc + 1, (char **)command_line);
1111
1112         fp = fopen(script, "r");
1113         if (!fp) {
1114                 sprintf(buf, "Can't open python script \"%s\"", script);
1115                 perror(buf);
1116                 err = -1;
1117                 goto error;
1118         }
1119
1120         err = PyRun_SimpleFile(fp, script);
1121         if (err) {
1122                 fprintf(stderr, "Error running python script %s\n", script);
1123                 goto error;
1124         }
1125
1126         err = run_start_sub();
1127         if (err) {
1128                 fprintf(stderr, "Error starting python script %s\n", script);
1129                 goto error;
1130         }
1131
1132         set_table_handlers(tables);
1133
1134         if (tables->db_export_mode) {
1135                 err = db_export__branch_types(&tables->dbe);
1136                 if (err)
1137                         goto error;
1138         }
1139
1140         free(command_line);
1141
1142         return err;
1143 error:
1144         Py_Finalize();
1145         free(command_line);
1146
1147         return err;
1148 }
1149
1150 static int python_flush_script(void)
1151 {
1152         struct tables *tables = &tables_global;
1153
1154         return db_export__flush(&tables->dbe);
1155 }
1156
1157 /*
1158  * Stop trace script
1159  */
1160 static int python_stop_script(void)
1161 {
1162         struct tables *tables = &tables_global;
1163
1164         try_call_object("trace_end", NULL);
1165
1166         db_export__exit(&tables->dbe);
1167
1168         Py_XDECREF(main_dict);
1169         Py_XDECREF(main_module);
1170         Py_Finalize();
1171
1172         return 0;
1173 }
1174
1175 static int python_generate_script(struct pevent *pevent, const char *outfile)
1176 {
1177         struct event_format *event = NULL;
1178         struct format_field *f;
1179         char fname[PATH_MAX];
1180         int not_first, count;
1181         FILE *ofp;
1182
1183         sprintf(fname, "%s.py", outfile);
1184         ofp = fopen(fname, "w");
1185         if (ofp == NULL) {
1186                 fprintf(stderr, "couldn't open %s\n", fname);
1187                 return -1;
1188         }
1189         fprintf(ofp, "# perf script event handlers, "
1190                 "generated by perf script -g python\n");
1191
1192         fprintf(ofp, "# Licensed under the terms of the GNU GPL"
1193                 " License version 2\n\n");
1194
1195         fprintf(ofp, "# The common_* event handler fields are the most useful "
1196                 "fields common to\n");
1197
1198         fprintf(ofp, "# all events.  They don't necessarily correspond to "
1199                 "the 'common_*' fields\n");
1200
1201         fprintf(ofp, "# in the format files.  Those fields not available as "
1202                 "handler params can\n");
1203
1204         fprintf(ofp, "# be retrieved using Python functions of the form "
1205                 "common_*(context).\n");
1206
1207         fprintf(ofp, "# See the perf-trace-python Documentation for the list "
1208                 "of available functions.\n\n");
1209
1210         fprintf(ofp, "import os\n");
1211         fprintf(ofp, "import sys\n\n");
1212
1213         fprintf(ofp, "sys.path.append(os.environ['PERF_EXEC_PATH'] + \\\n");
1214         fprintf(ofp, "\t'/scripts/python/Perf-Trace-Util/lib/Perf/Trace')\n");
1215         fprintf(ofp, "\nfrom perf_trace_context import *\n");
1216         fprintf(ofp, "from Core import *\n\n\n");
1217
1218         fprintf(ofp, "def trace_begin():\n");
1219         fprintf(ofp, "\tprint \"in trace_begin\"\n\n");
1220
1221         fprintf(ofp, "def trace_end():\n");
1222         fprintf(ofp, "\tprint \"in trace_end\"\n\n");
1223
1224         while ((event = trace_find_next_event(pevent, event))) {
1225                 fprintf(ofp, "def %s__%s(", event->system, event->name);
1226                 fprintf(ofp, "event_name, ");
1227                 fprintf(ofp, "context, ");
1228                 fprintf(ofp, "common_cpu,\n");
1229                 fprintf(ofp, "\tcommon_secs, ");
1230                 fprintf(ofp, "common_nsecs, ");
1231                 fprintf(ofp, "common_pid, ");
1232                 fprintf(ofp, "common_comm,\n\t");
1233                 fprintf(ofp, "common_callchain, ");
1234
1235                 not_first = 0;
1236                 count = 0;
1237
1238                 for (f = event->format.fields; f; f = f->next) {
1239                         if (not_first++)
1240                                 fprintf(ofp, ", ");
1241                         if (++count % 5 == 0)
1242                                 fprintf(ofp, "\n\t");
1243
1244                         fprintf(ofp, "%s", f->name);
1245                 }
1246                 fprintf(ofp, "):\n");
1247
1248                 fprintf(ofp, "\t\tprint_header(event_name, common_cpu, "
1249                         "common_secs, common_nsecs,\n\t\t\t"
1250                         "common_pid, common_comm)\n\n");
1251
1252                 fprintf(ofp, "\t\tprint \"");
1253
1254                 not_first = 0;
1255                 count = 0;
1256
1257                 for (f = event->format.fields; f; f = f->next) {
1258                         if (not_first++)
1259                                 fprintf(ofp, ", ");
1260                         if (count && count % 3 == 0) {
1261                                 fprintf(ofp, "\" \\\n\t\t\"");
1262                         }
1263                         count++;
1264
1265                         fprintf(ofp, "%s=", f->name);
1266                         if (f->flags & FIELD_IS_STRING ||
1267                             f->flags & FIELD_IS_FLAG ||
1268                             f->flags & FIELD_IS_ARRAY ||
1269                             f->flags & FIELD_IS_SYMBOLIC)
1270                                 fprintf(ofp, "%%s");
1271                         else if (f->flags & FIELD_IS_SIGNED)
1272                                 fprintf(ofp, "%%d");
1273                         else
1274                                 fprintf(ofp, "%%u");
1275                 }
1276
1277                 fprintf(ofp, "\" %% \\\n\t\t(");
1278
1279                 not_first = 0;
1280                 count = 0;
1281
1282                 for (f = event->format.fields; f; f = f->next) {
1283                         if (not_first++)
1284                                 fprintf(ofp, ", ");
1285
1286                         if (++count % 5 == 0)
1287                                 fprintf(ofp, "\n\t\t");
1288
1289                         if (f->flags & FIELD_IS_FLAG) {
1290                                 if ((count - 1) % 5 != 0) {
1291                                         fprintf(ofp, "\n\t\t");
1292                                         count = 4;
1293                                 }
1294                                 fprintf(ofp, "flag_str(\"");
1295                                 fprintf(ofp, "%s__%s\", ", event->system,
1296                                         event->name);
1297                                 fprintf(ofp, "\"%s\", %s)", f->name,
1298                                         f->name);
1299                         } else if (f->flags & FIELD_IS_SYMBOLIC) {
1300                                 if ((count - 1) % 5 != 0) {
1301                                         fprintf(ofp, "\n\t\t");
1302                                         count = 4;
1303                                 }
1304                                 fprintf(ofp, "symbol_str(\"");
1305                                 fprintf(ofp, "%s__%s\", ", event->system,
1306                                         event->name);
1307                                 fprintf(ofp, "\"%s\", %s)", f->name,
1308                                         f->name);
1309                         } else
1310                                 fprintf(ofp, "%s", f->name);
1311                 }
1312
1313                 fprintf(ofp, ")\n\n");
1314
1315                 fprintf(ofp, "\t\tfor node in common_callchain:");
1316                 fprintf(ofp, "\n\t\t\tif 'sym' in node:");
1317                 fprintf(ofp, "\n\t\t\t\tprint \"\\t[%%x] %%s\" %% (node['ip'], node['sym']['name'])");
1318                 fprintf(ofp, "\n\t\t\telse:");
1319                 fprintf(ofp, "\n\t\t\t\tprint \"\t[%%x]\" %% (node['ip'])\n\n");
1320                 fprintf(ofp, "\t\tprint \"\\n\"\n\n");
1321
1322         }
1323
1324         fprintf(ofp, "def trace_unhandled(event_name, context, "
1325                 "event_fields_dict):\n");
1326
1327         fprintf(ofp, "\t\tprint ' '.join(['%%s=%%s'%%(k,str(v))"
1328                 "for k,v in sorted(event_fields_dict.items())])\n\n");
1329
1330         fprintf(ofp, "def print_header("
1331                 "event_name, cpu, secs, nsecs, pid, comm):\n"
1332                 "\tprint \"%%-20s %%5u %%05u.%%09u %%8u %%-20s \" %% \\\n\t"
1333                 "(event_name, cpu, secs, nsecs, pid, comm),\n");
1334
1335         fclose(ofp);
1336
1337         fprintf(stderr, "generated Python script: %s\n", fname);
1338
1339         return 0;
1340 }
1341
1342 struct scripting_ops python_scripting_ops = {
1343         .name                   = "Python",
1344         .start_script           = python_start_script,
1345         .flush_script           = python_flush_script,
1346         .stop_script            = python_stop_script,
1347         .process_event          = python_process_event,
1348         .process_stat           = python_process_stat,
1349         .process_stat_interval  = python_process_stat_interval,
1350         .generate_script        = python_generate_script,
1351 };