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 <inttypes.h>
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <stdbool.h>
  29 #include <errno.h>
  30 #include <linux/bitmap.h>
  31 #include <linux/time64.h>
  32
  33 #include "../../perf.h"
  34 #include "../debug.h"
  35 #include "../callchain.h"
  36 #include "../evsel.h"
  37 #include "../util.h"
  38 #include "../event.h"
  39 #include "../thread.h"
  40 #include "../comm.h"
  41 #include "../machine.h"
  42 #include "../db-export.h"
  43 #include "../thread-stack.h"
  44 #include "../trace-event.h"
  45 #include "../machine.h"
  46 #include "../call-path.h"
  47 #include "thread_map.h"
  48 #include "cpumap.h"
  49 #include "print_binary.h"
  50 #include "stat.h"
  51
  52 PyMODINIT_FUNC initperf_trace_context(void);
  53
  54 #define TRACE_EVENT_TYPE_MAX                            \
  55         ((1 << (sizeof(unsigned short) * 8)) - 1)
  56
  57 static DECLARE_BITMAP(events_defined, TRACE_EVENT_TYPE_MAX);
  58
  59 #define MAX_FIELDS      64
  60 #define N_COMMON_FIELDS 7
  61
  62 extern struct scripting_context *scripting_context;
  63
  64 static char *cur_field_name;
  65 static int zero_flag_atom;
  66
  67 static PyObject *main_module, *main_dict;
  68
  69 struct tables {
  70         struct db_export        dbe;
  71         PyObject                *evsel_handler;
  72         PyObject                *machine_handler;
  73         PyObject                *thread_handler;
  74         PyObject                *comm_handler;
  75         PyObject                *comm_thread_handler;
  76         PyObject                *dso_handler;
  77         PyObject                *symbol_handler;
  78         PyObject                *branch_type_handler;
  79         PyObject                *sample_handler;
  80         PyObject                *call_path_handler;
  81         PyObject                *call_return_handler;
  82         bool                    db_export_mode;
  83 };
  84
  85 static struct tables tables_global;
  86
  87 static void handler_call_die(const char *handler_name) NORETURN;
  88 static void handler_call_die(const char *handler_name)
  89 {
  90         PyErr_Print();
  91         Py_FatalError("problem in Python trace event handler");
  92         // Py_FatalError does not return
  93         // but we have to make the compiler happy
  94         abort();
  95 }
  96
  97 /*
  98  * Insert val into into the dictionary and decrement the reference counter.
  99  * This is necessary for dictionaries since PyDict_SetItemString() does not
 100  * steal a reference, as opposed to PyTuple_SetItem().
 101  */
 102 static void pydict_set_item_string_decref(PyObject *dict, const char *key, PyObject *val)
 103 {
 104         PyDict_SetItemString(dict, key, val);
 105         Py_DECREF(val);
 106 }
 107
 108 static PyObject *get_handler(const char *handler_name)
 109 {
 110         PyObject *handler;
 111
 112         handler = PyDict_GetItemString(main_dict, handler_name);
 113         if (handler && !PyCallable_Check(handler))
 114                 return NULL;
 115         return handler;
 116 }
 117
 118 static void call_object(PyObject *handler, PyObject *args, const char *die_msg)
 119 {
 120         PyObject *retval;
 121
 122         retval = PyObject_CallObject(handler, args);
 123         if (retval == NULL)
 124                 handler_call_die(die_msg);
 125         Py_DECREF(retval);
 126 }
 127
 128 static void try_call_object(const char *handler_name, PyObject *args)
 129 {
 130         PyObject *handler;
 131
 132         handler = get_handler(handler_name);
 133         if (handler)
 134                 call_object(handler, args, handler_name);
 135 }
 136
 137 static void define_value(enum print_arg_type field_type,
 138                          const char *ev_name,
 139                          const char *field_name,
 140                          const char *field_value,
 141                          const char *field_str)
 142 {
 143         const char *handler_name = "define_flag_value";
 144         PyObject *t;
 145         unsigned long long value;
 146         unsigned n = 0;
 147
 148         if (field_type == PRINT_SYMBOL)
 149                 handler_name = "define_symbolic_value";
 150
 151         t = PyTuple_New(4);
 152         if (!t)
 153                 Py_FatalError("couldn't create Python tuple");
 154
 155         value = eval_flag(field_value);
 156
 157         PyTuple_SetItem(t, n++, PyString_FromString(ev_name));
 158         PyTuple_SetItem(t, n++, PyString_FromString(field_name));
 159         PyTuple_SetItem(t, n++, PyInt_FromLong(value));
 160         PyTuple_SetItem(t, n++, PyString_FromString(field_str));
 161
 162         try_call_object(handler_name, t);
 163
 164         Py_DECREF(t);
 165 }
 166
 167 static void define_values(enum print_arg_type field_type,
 168                           struct print_flag_sym *field,
 169                           const char *ev_name,
 170                           const char *field_name)
 171 {
 172         define_value(field_type, ev_name, field_name, field->value,
 173                      field->str);
 174
 175         if (field->next)
 176                 define_values(field_type, field->next, ev_name, field_name);
 177 }
 178
 179 static void define_field(enum print_arg_type field_type,
 180                          const char *ev_name,
 181                          const char *field_name,
 182                          const char *delim)
 183 {
 184         const char *handler_name = "define_flag_field";
 185         PyObject *t;
 186         unsigned n = 0;
 187
 188         if (field_type == PRINT_SYMBOL)
 189                 handler_name = "define_symbolic_field";
 190
 191         if (field_type == PRINT_FLAGS)
 192                 t = PyTuple_New(3);
 193         else
 194                 t = PyTuple_New(2);
 195         if (!t)
 196                 Py_FatalError("couldn't create Python tuple");
 197
 198         PyTuple_SetItem(t, n++, PyString_FromString(ev_name));
 199         PyTuple_SetItem(t, n++, PyString_FromString(field_name));
 200         if (field_type == PRINT_FLAGS)
 201                 PyTuple_SetItem(t, n++, PyString_FromString(delim));
 202
 203         try_call_object(handler_name, t);
 204
 205         Py_DECREF(t);
 206 }
 207
 208 static void define_event_symbols(struct event_format *event,
 209                                  const char *ev_name,
 210                                  struct print_arg *args)
 211 {
 212         if (args == NULL)
 213                 return;
 214
 215         switch (args->type) {
 216         case PRINT_NULL:
 217                 break;
 218         case PRINT_ATOM:
 219                 define_value(PRINT_FLAGS, ev_name, cur_field_name, "0",
 220                              args->atom.atom);
 221                 zero_flag_atom = 0;
 222                 break;
 223         case PRINT_FIELD:
 224                 free(cur_field_name);
 225                 cur_field_name = strdup(args->field.name);
 226                 break;
 227         case PRINT_FLAGS:
 228                 define_event_symbols(event, ev_name, args->flags.field);
 229                 define_field(PRINT_FLAGS, ev_name, cur_field_name,
 230                              args->flags.delim);
 231                 define_values(PRINT_FLAGS, args->flags.flags, ev_name,
 232                               cur_field_name);
 233                 break;
 234         case PRINT_SYMBOL:
 235                 define_event_symbols(event, ev_name, args->symbol.field);
 236                 define_field(PRINT_SYMBOL, ev_name, cur_field_name, NULL);
 237                 define_values(PRINT_SYMBOL, args->symbol.symbols, ev_name,
 238                               cur_field_name);
 239                 break;
 240         case PRINT_HEX:
 241         case PRINT_HEX_STR:
 242                 define_event_symbols(event, ev_name, args->hex.field);
 243                 define_event_symbols(event, ev_name, args->hex.size);
 244                 break;
 245         case PRINT_INT_ARRAY:
 246                 define_event_symbols(event, ev_name, args->int_array.field);
 247                 define_event_symbols(event, ev_name, args->int_array.count);
 248                 define_event_symbols(event, ev_name, args->int_array.el_size);
 249                 break;
 250         case PRINT_STRING:
 251                 break;
 252         case PRINT_TYPE:
 253                 define_event_symbols(event, ev_name, args->typecast.item);
 254                 break;
 255         case PRINT_OP:
 256                 if (strcmp(args->op.op, ":") == 0)
 257                         zero_flag_atom = 1;
 258                 define_event_symbols(event, ev_name, args->op.left);
 259                 define_event_symbols(event, ev_name, args->op.right);
 260                 break;
 261         default:
 262                 /* gcc warns for these? */
 263         case PRINT_BSTRING:
 264         case PRINT_DYNAMIC_ARRAY:
 265         case PRINT_DYNAMIC_ARRAY_LEN:
 266         case PRINT_FUNC:
 267         case PRINT_BITMASK:
 268                 /* we should warn... */
 269                 return;
 270         }
 271
 272         if (args->next)
 273                 define_event_symbols(event, ev_name, args->next);
 274 }
 275
 276 static PyObject *get_field_numeric_entry(struct event_format *event,
 277                 struct format_field *field, void *data)
 278 {
 279         bool is_array = field->flags & FIELD_IS_ARRAY;
 280         PyObject *obj = NULL, *list = NULL;
 281         unsigned long long val;
 282         unsigned int item_size, n_items, i;
 283
 284         if (is_array) {
 285                 list = PyList_New(field->arraylen);
 286                 item_size = field->size / field->arraylen;
 287                 n_items = field->arraylen;
 288         } else {
 289                 item_size = field->size;
 290                 n_items = 1;
 291         }
 292
 293         for (i = 0; i < n_items; i++) {
 294
 295                 val = read_size(event, data + field->offset + i * item_size,
 296                                 item_size);
 297                 if (field->flags & FIELD_IS_SIGNED) {
 298                         if ((long long)val >= LONG_MIN &&
 299                                         (long long)val <= LONG_MAX)
 300                                 obj = PyInt_FromLong(val);
 301                         else
 302                                 obj = PyLong_FromLongLong(val);
 303                 } else {
 304                         if (val <= LONG_MAX)
 305                                 obj = PyInt_FromLong(val);
 306                         else
 307                                 obj = PyLong_FromUnsignedLongLong(val);
 308                 }
 309                 if (is_array)
 310                         PyList_SET_ITEM(list, i, obj);
 311         }
 312         if (is_array)
 313                 obj = list;
 314         return obj;
 315 }
 316
 317
 318 static PyObject *python_process_callchain(struct perf_sample *sample,
 319                                          struct perf_evsel *evsel,
 320                                          struct addr_location *al)
 321 {
 322         PyObject *pylist;
 323
 324         pylist = PyList_New(0);
 325         if (!pylist)
 326                 Py_FatalError("couldn't create Python list");
 327
 328         if (!symbol_conf.use_callchain || !sample->callchain)
 329                 goto exit;
 330
 331         if (thread__resolve_callchain(al->thread, &callchain_cursor, evsel,
 332                                       sample, NULL, NULL,
 333                                       scripting_max_stack) != 0) {
 334                 pr_err("Failed to resolve callchain. Skipping\n");
 335                 goto exit;
 336         }
 337         callchain_cursor_commit(&callchain_cursor);
 338
 339
 340         while (1) {
 341                 PyObject *pyelem;
 342                 struct callchain_cursor_node *node;
 343                 node = callchain_cursor_current(&callchain_cursor);
 344                 if (!node)
 345                         break;
 346
 347                 pyelem = PyDict_New();
 348                 if (!pyelem)
 349                         Py_FatalError("couldn't create Python dictionary");
 350
 351
 352                 pydict_set_item_string_decref(pyelem, "ip",
 353                                 PyLong_FromUnsignedLongLong(node->ip));
 354
 355                 if (node->sym) {
 356                         PyObject *pysym  = PyDict_New();
 357                         if (!pysym)
 358                                 Py_FatalError("couldn't create Python dictionary");
 359                         pydict_set_item_string_decref(pysym, "start",
 360                                         PyLong_FromUnsignedLongLong(node->sym->start));
 361                         pydict_set_item_string_decref(pysym, "end",
 362                                         PyLong_FromUnsignedLongLong(node->sym->end));
 363                         pydict_set_item_string_decref(pysym, "binding",
 364                                         PyInt_FromLong(node->sym->binding));
 365                         pydict_set_item_string_decref(pysym, "name",
 366                                         PyString_FromStringAndSize(node->sym->name,
 367                                                         node->sym->namelen));
 368                         pydict_set_item_string_decref(pyelem, "sym", pysym);
 369                 }
 370
 371                 if (node->map) {
 372                         struct map *map = node->map;
 373                         const char *dsoname = "[unknown]";
 374                         if (map && map->dso) {
 375                                 if (symbol_conf.show_kernel_path && map->dso->long_name)
 376                                         dsoname = map->dso->long_name;
 377                                 else
 378                                         dsoname = map->dso->name;
 379                         }
 380                         pydict_set_item_string_decref(pyelem, "dso",
 381                                         PyString_FromString(dsoname));
 382                 }
 383
 384                 callchain_cursor_advance(&callchain_cursor);
 385                 PyList_Append(pylist, pyelem);
 386                 Py_DECREF(pyelem);
 387         }
 388
 389 exit:
 390         return pylist;
 391 }
 392
 393 static void python_process_tracepoint(struct perf_sample *sample,
 394                                       struct perf_evsel *evsel,
 395                                       struct addr_location *al)
 396 {
 397         struct event_format *event = evsel->tp_format;
 398         PyObject *handler, *context, *t, *obj = NULL, *callchain;
 399         PyObject *dict = NULL;
 400         static char handler_name[256];
 401         struct format_field *field;
 402         unsigned long s, ns;
 403         unsigned n = 0;
 404         int pid;
 405         int cpu = sample->cpu;
 406         void *data = sample->raw_data;
 407         unsigned long long nsecs = sample->time;
 408         const char *comm = thread__comm_str(al->thread);
 409
 410         t = PyTuple_New(MAX_FIELDS);
 411         if (!t)
 412                 Py_FatalError("couldn't create Python tuple");
 413
 414         if (!event) {
 415                 snprintf(handler_name, sizeof(handler_name),
 416                          "ug! no event found for type %" PRIu64, (u64)evsel->attr.config);
 417                 Py_FatalError(handler_name);
 418         }
 419
 420         pid = raw_field_value(event, "common_pid", data);
 421
 422         sprintf(handler_name, "%s__%s", event->system, event->name);
 423
 424         if (!test_and_set_bit(event->id, events_defined))
 425                 define_event_symbols(event, handler_name, event->print_fmt.args);
 426
 427         handler = get_handler(handler_name);
 428         if (!handler) {
 429                 dict = PyDict_New();
 430                 if (!dict)
 431                         Py_FatalError("couldn't create Python dict");
 432         }
 433         s = nsecs / NSEC_PER_SEC;
 434         ns = nsecs - s * NSEC_PER_SEC;
 435
 436         scripting_context->event_data = data;
 437         scripting_context->pevent = evsel->tp_format->pevent;
 438
 439         context = PyCObject_FromVoidPtr(scripting_context, NULL);
 440
 441         PyTuple_SetItem(t, n++, PyString_FromString(handler_name));
 442         PyTuple_SetItem(t, n++, context);
 443
 444         /* ip unwinding */
 445         callchain = python_process_callchain(sample, evsel, al);
 446
 447         if (handler) {
 448                 PyTuple_SetItem(t, n++, PyInt_FromLong(cpu));
 449                 PyTuple_SetItem(t, n++, PyInt_FromLong(s));
 450                 PyTuple_SetItem(t, n++, PyInt_FromLong(ns));
 451                 PyTuple_SetItem(t, n++, PyInt_FromLong(pid));
 452                 PyTuple_SetItem(t, n++, PyString_FromString(comm));
 453                 PyTuple_SetItem(t, n++, callchain);
 454         } else {
 455                 pydict_set_item_string_decref(dict, "common_cpu", PyInt_FromLong(cpu));
 456                 pydict_set_item_string_decref(dict, "common_s", PyInt_FromLong(s));
 457                 pydict_set_item_string_decref(dict, "common_ns", PyInt_FromLong(ns));
 458                 pydict_set_item_string_decref(dict, "common_pid", PyInt_FromLong(pid));
 459                 pydict_set_item_string_decref(dict, "common_comm", PyString_FromString(comm));
 460                 pydict_set_item_string_decref(dict, "common_callchain", callchain);
 461         }
 462         for (field = event->format.fields; field; field = field->next) {
 463                 unsigned int offset, len;
 464                 unsigned long long val;
 465
 466                 if (field->flags & FIELD_IS_ARRAY) {
 467                         offset = field->offset;
 468                         len    = field->size;
 469                         if (field->flags & FIELD_IS_DYNAMIC) {
 470                                 val     = pevent_read_number(scripting_context->pevent,
 471                                                              data + offset, len);
 472                                 offset  = val;
 473                                 len     = offset >> 16;
 474                                 offset &= 0xffff;
 475                         }
 476                         if (field->flags & FIELD_IS_STRING &&
 477                             is_printable_array(data + offset, len)) {
 478                                 obj = PyString_FromString((char *) data + offset);
 479                         } else {
 480                                 obj = PyByteArray_FromStringAndSize((const char *) data + offset, len);
 481                                 field->flags &= ~FIELD_IS_STRING;
 482                         }
 483                 } else { /* FIELD_IS_NUMERIC */
 484                         obj = get_field_numeric_entry(event, field, data);
 485                 }
 486                 if (handler)
 487                         PyTuple_SetItem(t, n++, obj);
 488                 else
 489                         pydict_set_item_string_decref(dict, field->name, obj);
 490
 491         }
 492
 493         if (!handler)
 494                 PyTuple_SetItem(t, n++, dict);
 495
 496         if (_PyTuple_Resize(&t, n) == -1)
 497                 Py_FatalError("error resizing Python tuple");
 498
 499         if (handler) {
 500                 call_object(handler, t, handler_name);
 501         } else {
 502                 try_call_object("trace_unhandled", t);
 503                 Py_DECREF(dict);
 504         }
 505
 506         Py_DECREF(t);
 507 }
 508
 509 static PyObject *tuple_new(unsigned int sz)
 510 {
 511         PyObject *t;
 512
 513         t = PyTuple_New(sz);
 514         if (!t)
 515                 Py_FatalError("couldn't create Python tuple");
 516         return t;
 517 }
 518
 519 static int tuple_set_u64(PyObject *t, unsigned int pos, u64 val)
 520 {
 521 #if BITS_PER_LONG == 64
 522         return PyTuple_SetItem(t, pos, PyInt_FromLong(val));
 523 #endif
 524 #if BITS_PER_LONG == 32
 525         return PyTuple_SetItem(t, pos, PyLong_FromLongLong(val));
 526 #endif
 527 }
 528
 529 static int tuple_set_s32(PyObject *t, unsigned int pos, s32 val)
 530 {
 531         return PyTuple_SetItem(t, pos, PyInt_FromLong(val));
 532 }
 533
 534 static int tuple_set_string(PyObject *t, unsigned int pos, const char *s)
 535 {
 536         return PyTuple_SetItem(t, pos, PyString_FromString(s));
 537 }
 538
 539 static int python_export_evsel(struct db_export *dbe, struct perf_evsel *evsel)
 540 {
 541         struct tables *tables = container_of(dbe, struct tables, dbe);
 542         PyObject *t;
 543
 544         t = tuple_new(2);
 545
 546         tuple_set_u64(t, 0, evsel->db_id);
 547         tuple_set_string(t, 1, perf_evsel__name(evsel));
 548
 549         call_object(tables->evsel_handler, t, "evsel_table");
 550
 551         Py_DECREF(t);
 552
 553         return 0;
 554 }
 555
 556 static int python_export_machine(struct db_export *dbe,
 557                                  struct machine *machine)
 558 {
 559         struct tables *tables = container_of(dbe, struct tables, dbe);
 560         PyObject *t;
 561
 562         t = tuple_new(3);
 563
 564         tuple_set_u64(t, 0, machine->db_id);
 565         tuple_set_s32(t, 1, machine->pid);
 566         tuple_set_string(t, 2, machine->root_dir ? machine->root_dir : "");
 567
 568         call_object(tables->machine_handler, t, "machine_table");
 569
 570         Py_DECREF(t);
 571
 572         return 0;
 573 }
 574
 575 static int python_export_thread(struct db_export *dbe, struct thread *thread,
 576                                 u64 main_thread_db_id, struct machine *machine)
 577 {
 578         struct tables *tables = container_of(dbe, struct tables, dbe);
 579         PyObject *t;
 580
 581         t = tuple_new(5);
 582
 583         tuple_set_u64(t, 0, thread->db_id);
 584         tuple_set_u64(t, 1, machine->db_id);
 585         tuple_set_u64(t, 2, main_thread_db_id);
 586         tuple_set_s32(t, 3, thread->pid_);
 587         tuple_set_s32(t, 4, thread->tid);
 588
 589         call_object(tables->thread_handler, t, "thread_table");
 590
 591         Py_DECREF(t);
 592
 593         return 0;
 594 }
 595
 596 static int python_export_comm(struct db_export *dbe, struct comm *comm)
 597 {
 598         struct tables *tables = container_of(dbe, struct tables, dbe);
 599         PyObject *t;
 600
 601         t = tuple_new(2);
 602
 603         tuple_set_u64(t, 0, comm->db_id);
 604         tuple_set_string(t, 1, comm__str(comm));
 605
 606         call_object(tables->comm_handler, t, "comm_table");
 607
 608         Py_DECREF(t);
 609
 610         return 0;
 611 }
 612
 613 static int python_export_comm_thread(struct db_export *dbe, u64 db_id,
 614                                      struct comm *comm, struct thread *thread)
 615 {
 616         struct tables *tables = container_of(dbe, struct tables, dbe);
 617         PyObject *t;
 618
 619         t = tuple_new(3);
 620
 621         tuple_set_u64(t, 0, db_id);
 622         tuple_set_u64(t, 1, comm->db_id);
 623         tuple_set_u64(t, 2, thread->db_id);
 624
 625         call_object(tables->comm_thread_handler, t, "comm_thread_table");
 626
 627         Py_DECREF(t);
 628
 629         return 0;
 630 }
 631
 632 static int python_export_dso(struct db_export *dbe, struct dso *dso,
 633                              struct machine *machine)
 634 {
 635         struct tables *tables = container_of(dbe, struct tables, dbe);
 636         char sbuild_id[SBUILD_ID_SIZE];
 637         PyObject *t;
 638
 639         build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id);
 640
 641         t = tuple_new(5);
 642
 643         tuple_set_u64(t, 0, dso->db_id);
 644         tuple_set_u64(t, 1, machine->db_id);
 645         tuple_set_string(t, 2, dso->short_name);
 646         tuple_set_string(t, 3, dso->long_name);
 647         tuple_set_string(t, 4, sbuild_id);
 648
 649         call_object(tables->dso_handler, t, "dso_table");
 650
 651         Py_DECREF(t);
 652
 653         return 0;
 654 }
 655
 656 static int python_export_symbol(struct db_export *dbe, struct symbol *sym,
 657                                 struct dso *dso)
 658 {
 659         struct tables *tables = container_of(dbe, struct tables, dbe);
 660         u64 *sym_db_id = symbol__priv(sym);
 661         PyObject *t;
 662
 663         t = tuple_new(6);
 664
 665         tuple_set_u64(t, 0, *sym_db_id);
 666         tuple_set_u64(t, 1, dso->db_id);
 667         tuple_set_u64(t, 2, sym->start);
 668         tuple_set_u64(t, 3, sym->end);
 669         tuple_set_s32(t, 4, sym->binding);
 670         tuple_set_string(t, 5, sym->name);
 671
 672         call_object(tables->symbol_handler, t, "symbol_table");
 673
 674         Py_DECREF(t);
 675
 676         return 0;
 677 }
 678
 679 static int python_export_branch_type(struct db_export *dbe, u32 branch_type,
 680                                      const char *name)
 681 {
 682         struct tables *tables = container_of(dbe, struct tables, dbe);
 683         PyObject *t;
 684
 685         t = tuple_new(2);
 686
 687         tuple_set_s32(t, 0, branch_type);
 688         tuple_set_string(t, 1, name);
 689
 690         call_object(tables->branch_type_handler, t, "branch_type_table");
 691
 692         Py_DECREF(t);
 693
 694         return 0;
 695 }
 696
 697 static int python_export_sample(struct db_export *dbe,
 698                                 struct export_sample *es)
 699 {
 700         struct tables *tables = container_of(dbe, struct tables, dbe);
 701         PyObject *t;
 702
 703         t = tuple_new(22);
 704
 705         tuple_set_u64(t, 0, es->db_id);
 706         tuple_set_u64(t, 1, es->evsel->db_id);
 707         tuple_set_u64(t, 2, es->al->machine->db_id);
 708         tuple_set_u64(t, 3, es->al->thread->db_id);
 709         tuple_set_u64(t, 4, es->comm_db_id);
 710         tuple_set_u64(t, 5, es->dso_db_id);
 711         tuple_set_u64(t, 6, es->sym_db_id);
 712         tuple_set_u64(t, 7, es->offset);
 713         tuple_set_u64(t, 8, es->sample->ip);
 714         tuple_set_u64(t, 9, es->sample->time);
 715         tuple_set_s32(t, 10, es->sample->cpu);
 716         tuple_set_u64(t, 11, es->addr_dso_db_id);
 717         tuple_set_u64(t, 12, es->addr_sym_db_id);
 718         tuple_set_u64(t, 13, es->addr_offset);
 719         tuple_set_u64(t, 14, es->sample->addr);
 720         tuple_set_u64(t, 15, es->sample->period);
 721         tuple_set_u64(t, 16, es->sample->weight);
 722         tuple_set_u64(t, 17, es->sample->transaction);
 723         tuple_set_u64(t, 18, es->sample->data_src);
 724         tuple_set_s32(t, 19, es->sample->flags & PERF_BRANCH_MASK);
 725         tuple_set_s32(t, 20, !!(es->sample->flags & PERF_IP_FLAG_IN_TX));
 726         tuple_set_u64(t, 21, es->call_path_id);
 727
 728         call_object(tables->sample_handler, t, "sample_table");
 729
 730         Py_DECREF(t);
 731
 732         return 0;
 733 }
 734
 735 static int python_export_call_path(struct db_export *dbe, struct call_path *cp)
 736 {
 737         struct tables *tables = container_of(dbe, struct tables, dbe);
 738         PyObject *t;
 739         u64 parent_db_id, sym_db_id;
 740
 741         parent_db_id = cp->parent ? cp->parent->db_id : 0;
 742         sym_db_id = cp->sym ? *(u64 *)symbol__priv(cp->sym) : 0;
 743
 744         t = tuple_new(4);
 745
 746         tuple_set_u64(t, 0, cp->db_id);
 747         tuple_set_u64(t, 1, parent_db_id);
 748         tuple_set_u64(t, 2, sym_db_id);
 749         tuple_set_u64(t, 3, cp->ip);
 750
 751         call_object(tables->call_path_handler, t, "call_path_table");
 752
 753         Py_DECREF(t);
 754
 755         return 0;
 756 }
 757
 758 static int python_export_call_return(struct db_export *dbe,
 759                                      struct call_return *cr)
 760 {
 761         struct tables *tables = container_of(dbe, struct tables, dbe);
 762         u64 comm_db_id = cr->comm ? cr->comm->db_id : 0;
 763         PyObject *t;
 764
 765         t = tuple_new(11);
 766
 767         tuple_set_u64(t, 0, cr->db_id);
 768         tuple_set_u64(t, 1, cr->thread->db_id);
 769         tuple_set_u64(t, 2, comm_db_id);
 770         tuple_set_u64(t, 3, cr->cp->db_id);
 771         tuple_set_u64(t, 4, cr->call_time);
 772         tuple_set_u64(t, 5, cr->return_time);
 773         tuple_set_u64(t, 6, cr->branch_count);
 774         tuple_set_u64(t, 7, cr->call_ref);
 775         tuple_set_u64(t, 8, cr->return_ref);
 776         tuple_set_u64(t, 9, cr->cp->parent->db_id);
 777         tuple_set_s32(t, 10, cr->flags);
 778
 779         call_object(tables->call_return_handler, t, "call_return_table");
 780
 781         Py_DECREF(t);
 782
 783         return 0;
 784 }
 785
 786 static int python_process_call_return(struct call_return *cr, void *data)
 787 {
 788         struct db_export *dbe = data;
 789
 790         return db_export__call_return(dbe, cr);
 791 }
 792
 793 static void python_process_general_event(struct perf_sample *sample,
 794                                          struct perf_evsel *evsel,
 795                                          struct addr_location *al)
 796 {
 797         PyObject *handler, *t, *dict, *callchain, *dict_sample;
 798         static char handler_name[64];
 799         unsigned n = 0;
 800
 801         /*
 802          * Use the MAX_FIELDS to make the function expandable, though
 803          * currently there is only one item for the tuple.
 804          */
 805         t = PyTuple_New(MAX_FIELDS);
 806         if (!t)
 807                 Py_FatalError("couldn't create Python tuple");
 808
 809         dict = PyDict_New();
 810         if (!dict)
 811                 Py_FatalError("couldn't create Python dictionary");
 812
 813         dict_sample = PyDict_New();
 814         if (!dict_sample)
 815                 Py_FatalError("couldn't create Python dictionary");
 816
 817         snprintf(handler_name, sizeof(handler_name), "%s", "process_event");
 818
 819         handler = get_handler(handler_name);
 820         if (!handler)
 821                 goto exit;
 822
 823         pydict_set_item_string_decref(dict, "ev_name", PyString_FromString(perf_evsel__name(evsel)));
 824         pydict_set_item_string_decref(dict, "attr", PyString_FromStringAndSize(
 825                         (const char *)&evsel->attr, sizeof(evsel->attr)));
 826
 827         pydict_set_item_string_decref(dict_sample, "pid",
 828                         PyInt_FromLong(sample->pid));
 829         pydict_set_item_string_decref(dict_sample, "tid",
 830                         PyInt_FromLong(sample->tid));
 831         pydict_set_item_string_decref(dict_sample, "cpu",
 832                         PyInt_FromLong(sample->cpu));
 833         pydict_set_item_string_decref(dict_sample, "ip",
 834                         PyLong_FromUnsignedLongLong(sample->ip));
 835         pydict_set_item_string_decref(dict_sample, "time",
 836                         PyLong_FromUnsignedLongLong(sample->time));
 837         pydict_set_item_string_decref(dict_sample, "period",
 838                         PyLong_FromUnsignedLongLong(sample->period));
 839         pydict_set_item_string_decref(dict, "sample", dict_sample);
 840
 841         pydict_set_item_string_decref(dict, "raw_buf", PyString_FromStringAndSize(
 842                         (const char *)sample->raw_data, sample->raw_size));
 843         pydict_set_item_string_decref(dict, "comm",
 844                         PyString_FromString(thread__comm_str(al->thread)));
 845         if (al->map) {
 846                 pydict_set_item_string_decref(dict, "dso",
 847                         PyString_FromString(al->map->dso->name));
 848         }
 849         if (al->sym) {
 850                 pydict_set_item_string_decref(dict, "symbol",
 851                         PyString_FromString(al->sym->name));
 852         }
 853
 854         /* ip unwinding */
 855         callchain = python_process_callchain(sample, evsel, al);
 856         pydict_set_item_string_decref(dict, "callchain", callchain);
 857
 858         PyTuple_SetItem(t, n++, dict);
 859         if (_PyTuple_Resize(&t, n) == -1)
 860                 Py_FatalError("error resizing Python tuple");
 861
 862         call_object(handler, t, handler_name);
 863 exit:
 864         Py_DECREF(dict);
 865         Py_DECREF(t);
 866 }
 867
 868 static void python_process_event(union perf_event *event,
 869                                  struct perf_sample *sample,
 870                                  struct perf_evsel *evsel,
 871                                  struct addr_location *al)
 872 {
 873         struct tables *tables = &tables_global;
 874
 875         switch (evsel->attr.type) {
 876         case PERF_TYPE_TRACEPOINT:
 877                 python_process_tracepoint(sample, evsel, al);
 878                 break;
 879         /* Reserve for future process_hw/sw/raw APIs */
 880         default:
 881                 if (tables->db_export_mode)
 882                         db_export__sample(&tables->dbe, event, sample, evsel, al);
 883                 else
 884                         python_process_general_event(sample, evsel, al);
 885         }
 886 }
 887
 888 static void get_handler_name(char *str, size_t size,
 889                              struct perf_evsel *evsel)
 890 {
 891         char *p = str;
 892
 893         scnprintf(str, size, "stat__%s", perf_evsel__name(evsel));
 894
 895         while ((p = strchr(p, ':'))) {
 896                 *p = '_';
 897                 p++;
 898         }
 899 }
 900
 901 static void
 902 process_stat(struct perf_evsel *counter, int cpu, int thread, u64 tstamp,
 903              struct perf_counts_values *count)
 904 {
 905         PyObject *handler, *t;
 906         static char handler_name[256];
 907         int n = 0;
 908
 909         t = PyTuple_New(MAX_FIELDS);
 910         if (!t)
 911                 Py_FatalError("couldn't create Python tuple");
 912
 913         get_handler_name(handler_name, sizeof(handler_name),
 914                          counter);
 915
 916         handler = get_handler(handler_name);
 917         if (!handler) {
 918                 pr_debug("can't find python handler %s\n", handler_name);
 919                 return;
 920         }
 921
 922         PyTuple_SetItem(t, n++, PyInt_FromLong(cpu));
 923         PyTuple_SetItem(t, n++, PyInt_FromLong(thread));
 924
 925         tuple_set_u64(t, n++, tstamp);
 926         tuple_set_u64(t, n++, count->val);
 927         tuple_set_u64(t, n++, count->ena);
 928         tuple_set_u64(t, n++, count->run);
 929
 930         if (_PyTuple_Resize(&t, n) == -1)
 931                 Py_FatalError("error resizing Python tuple");
 932
 933         call_object(handler, t, handler_name);
 934
 935         Py_DECREF(t);
 936 }
 937
 938 static void python_process_stat(struct perf_stat_config *config,
 939                                 struct perf_evsel *counter, u64 tstamp)
 940 {
 941         struct thread_map *threads = counter->threads;
 942         struct cpu_map *cpus = counter->cpus;
 943         int cpu, thread;
 944
 945         if (config->aggr_mode == AGGR_GLOBAL) {
 946                 process_stat(counter, -1, -1, tstamp,
 947                              &counter->counts->aggr);
 948                 return;
 949         }
 950
 951         for (thread = 0; thread < threads->nr; thread++) {
 952                 for (cpu = 0; cpu < cpus->nr; cpu++) {
 953                         process_stat(counter, cpus->map[cpu],
 954                                      thread_map__pid(threads, thread), tstamp,
 955                                      perf_counts(counter->counts, cpu, thread));
 956                 }
 957         }
 958 }
 959
 960 static void python_process_stat_interval(u64 tstamp)
 961 {
 962         PyObject *handler, *t;
 963         static const char handler_name[] = "stat__interval";
 964         int n = 0;
 965
 966         t = PyTuple_New(MAX_FIELDS);
 967         if (!t)
 968                 Py_FatalError("couldn't create Python tuple");
 969
 970         handler = get_handler(handler_name);
 971         if (!handler) {
 972                 pr_debug("can't find python handler %s\n", handler_name);
 973                 return;
 974         }
 975
 976         tuple_set_u64(t, n++, tstamp);
 977
 978         if (_PyTuple_Resize(&t, n) == -1)
 979                 Py_FatalError("error resizing Python tuple");
 980
 981         call_object(handler, t, handler_name);
 982
 983         Py_DECREF(t);
 984 }
 985
 986 static int run_start_sub(void)
 987 {
 988         main_module = PyImport_AddModule("__main__");
 989         if (main_module == NULL)
 990                 return -1;
 991         Py_INCREF(main_module);
 992
 993         main_dict = PyModule_GetDict(main_module);
 994         if (main_dict == NULL)
 995                 goto error;
 996         Py_INCREF(main_dict);
 997
 998         try_call_object("trace_begin", NULL);
 999
1000         return 0;
1001
1002 error:
1003         Py_XDECREF(main_dict);
1004         Py_XDECREF(main_module);
1005         return -1;
1006 }
1007
1008 #define SET_TABLE_HANDLER_(name, handler_name, table_name) do {         \
1009         tables->handler_name = get_handler(#table_name);                \
1010         if (tables->handler_name)                                       \
1011                 tables->dbe.export_ ## name = python_export_ ## name;   \
1012 } while (0)
1013
1014 #define SET_TABLE_HANDLER(name) \
1015         SET_TABLE_HANDLER_(name, name ## _handler, name ## _table)
1016
1017 static void set_table_handlers(struct tables *tables)
1018 {
1019         const char *perf_db_export_mode = "perf_db_export_mode";
1020         const char *perf_db_export_calls = "perf_db_export_calls";
1021         const char *perf_db_export_callchains = "perf_db_export_callchains";
1022         PyObject *db_export_mode, *db_export_calls, *db_export_callchains;
1023         bool export_calls = false;
1024         bool export_callchains = false;
1025         int ret;
1026
1027         memset(tables, 0, sizeof(struct tables));
1028         if (db_export__init(&tables->dbe))
1029                 Py_FatalError("failed to initialize export");
1030
1031         db_export_mode = PyDict_GetItemString(main_dict, perf_db_export_mode);
1032         if (!db_export_mode)
1033                 return;
1034
1035         ret = PyObject_IsTrue(db_export_mode);
1036         if (ret == -1)
1037                 handler_call_die(perf_db_export_mode);
1038         if (!ret)
1039                 return;
1040
1041         /* handle export calls */
1042         tables->dbe.crp = NULL;
1043         db_export_calls = PyDict_GetItemString(main_dict, perf_db_export_calls);
1044         if (db_export_calls) {
1045                 ret = PyObject_IsTrue(db_export_calls);
1046                 if (ret == -1)
1047                         handler_call_die(perf_db_export_calls);
1048                 export_calls = !!ret;
1049         }
1050
1051         if (export_calls) {
1052                 tables->dbe.crp =
1053                         call_return_processor__new(python_process_call_return,
1054                                                    &tables->dbe);
1055                 if (!tables->dbe.crp)
1056                         Py_FatalError("failed to create calls processor");
1057         }
1058
1059         /* handle export callchains */
1060         tables->dbe.cpr = NULL;
1061         db_export_callchains = PyDict_GetItemString(main_dict,
1062                                                     perf_db_export_callchains);
1063         if (db_export_callchains) {
1064                 ret = PyObject_IsTrue(db_export_callchains);
1065                 if (ret == -1)
1066                         handler_call_die(perf_db_export_callchains);
1067                 export_callchains = !!ret;
1068         }
1069
1070         if (export_callchains) {
1071                 /*
1072                  * Attempt to use the call path root from the call return
1073                  * processor, if the call return processor is in use. Otherwise,
1074                  * we allocate a new call path root. This prevents exporting
1075                  * duplicate call path ids when both are in use simultaniously.
1076                  */
1077                 if (tables->dbe.crp)
1078                         tables->dbe.cpr = tables->dbe.crp->cpr;
1079                 else
1080                         tables->dbe.cpr = call_path_root__new();
1081
1082                 if (!tables->dbe.cpr)
1083                         Py_FatalError("failed to create call path root");
1084         }
1085
1086         tables->db_export_mode = true;
1087         /*
1088          * Reserve per symbol space for symbol->db_id via symbol__priv()
1089          */
1090         symbol_conf.priv_size = sizeof(u64);
1091
1092         SET_TABLE_HANDLER(evsel);
1093         SET_TABLE_HANDLER(machine);
1094         SET_TABLE_HANDLER(thread);
1095         SET_TABLE_HANDLER(comm);
1096         SET_TABLE_HANDLER(comm_thread);
1097         SET_TABLE_HANDLER(dso);
1098         SET_TABLE_HANDLER(symbol);
1099         SET_TABLE_HANDLER(branch_type);
1100         SET_TABLE_HANDLER(sample);
1101         SET_TABLE_HANDLER(call_path);
1102         SET_TABLE_HANDLER(call_return);
1103 }
1104
1105 /*
1106  * Start trace script
1107  */
1108 static int python_start_script(const char *script, int argc, const char **argv)
1109 {
1110         struct tables *tables = &tables_global;
1111         const char **command_line;
1112         char buf[PATH_MAX];
1113         int i, err = 0;
1114         FILE *fp;
1115
1116         command_line = malloc((argc + 1) * sizeof(const char *));
1117         command_line[0] = script;
1118         for (i = 1; i < argc + 1; i++)
1119                 command_line[i] = argv[i - 1];
1120
1121         Py_Initialize();
1122
1123         initperf_trace_context();
1124
1125         PySys_SetArgv(argc + 1, (char **)command_line);
1126
1127         fp = fopen(script, "r");
1128         if (!fp) {
1129                 sprintf(buf, "Can't open python script \"%s\"", script);
1130                 perror(buf);
1131                 err = -1;
1132                 goto error;
1133         }
1134
1135         err = PyRun_SimpleFile(fp, script);
1136         if (err) {
1137                 fprintf(stderr, "Error running python script %s\n", script);
1138                 goto error;
1139         }
1140
1141         err = run_start_sub();
1142         if (err) {
1143                 fprintf(stderr, "Error starting python script %s\n", script);
1144                 goto error;
1145         }
1146
1147         set_table_handlers(tables);
1148
1149         if (tables->db_export_mode) {
1150                 err = db_export__branch_types(&tables->dbe);
1151                 if (err)
1152                         goto error;
1153         }
1154
1155         free(command_line);
1156
1157         return err;
1158 error:
1159         Py_Finalize();
1160         free(command_line);
1161
1162         return err;
1163 }
1164
1165 static int python_flush_script(void)
1166 {
1167         struct tables *tables = &tables_global;
1168
1169         return db_export__flush(&tables->dbe);
1170 }
1171
1172 /*
1173  * Stop trace script
1174  */
1175 static int python_stop_script(void)
1176 {
1177         struct tables *tables = &tables_global;
1178
1179         try_call_object("trace_end", NULL);
1180
1181         db_export__exit(&tables->dbe);
1182
1183         Py_XDECREF(main_dict);
1184         Py_XDECREF(main_module);
1185         Py_Finalize();
1186
1187         return 0;
1188 }
1189
1190 static int python_generate_script(struct pevent *pevent, const char *outfile)
1191 {
1192         struct event_format *event = NULL;
1193         struct format_field *f;
1194         char fname[PATH_MAX];
1195         int not_first, count;
1196         FILE *ofp;
1197
1198         sprintf(fname, "%s.py", outfile);
1199         ofp = fopen(fname, "w");
1200         if (ofp == NULL) {
1201                 fprintf(stderr, "couldn't open %s\n", fname);
1202                 return -1;
1203         }
1204         fprintf(ofp, "# perf script event handlers, "
1205                 "generated by perf script -g python\n");
1206
1207         fprintf(ofp, "# Licensed under the terms of the GNU GPL"
1208                 " License version 2\n\n");
1209
1210         fprintf(ofp, "# The common_* event handler fields are the most useful "
1211                 "fields common to\n");
1212
1213         fprintf(ofp, "# all events.  They don't necessarily correspond to "
1214                 "the 'common_*' fields\n");
1215
1216         fprintf(ofp, "# in the format files.  Those fields not available as "
1217                 "handler params can\n");
1218
1219         fprintf(ofp, "# be retrieved using Python functions of the form "
1220                 "common_*(context).\n");
1221
1222         fprintf(ofp, "# See the perf-script-python Documentation for the list "
1223                 "of available functions.\n\n");
1224
1225         fprintf(ofp, "import os\n");
1226         fprintf(ofp, "import sys\n\n");
1227
1228         fprintf(ofp, "sys.path.append(os.environ['PERF_EXEC_PATH'] + \\\n");
1229         fprintf(ofp, "\t'/scripts/python/Perf-Trace-Util/lib/Perf/Trace')\n");
1230         fprintf(ofp, "\nfrom perf_trace_context import *\n");
1231         fprintf(ofp, "from Core import *\n\n\n");
1232
1233         fprintf(ofp, "def trace_begin():\n");
1234         fprintf(ofp, "\tprint \"in trace_begin\"\n\n");
1235
1236         fprintf(ofp, "def trace_end():\n");
1237         fprintf(ofp, "\tprint \"in trace_end\"\n\n");
1238
1239         while ((event = trace_find_next_event(pevent, event))) {
1240                 fprintf(ofp, "def %s__%s(", event->system, event->name);
1241                 fprintf(ofp, "event_name, ");
1242                 fprintf(ofp, "context, ");
1243                 fprintf(ofp, "common_cpu,\n");
1244                 fprintf(ofp, "\tcommon_secs, ");
1245                 fprintf(ofp, "common_nsecs, ");
1246                 fprintf(ofp, "common_pid, ");
1247                 fprintf(ofp, "common_comm,\n\t");
1248                 fprintf(ofp, "common_callchain, ");
1249
1250                 not_first = 0;
1251                 count = 0;
1252
1253                 for (f = event->format.fields; f; f = f->next) {
1254                         if (not_first++)
1255                                 fprintf(ofp, ", ");
1256                         if (++count % 5 == 0)
1257                                 fprintf(ofp, "\n\t");
1258
1259                         fprintf(ofp, "%s", f->name);
1260                 }
1261                 fprintf(ofp, "):\n");
1262
1263                 fprintf(ofp, "\t\tprint_header(event_name, common_cpu, "
1264                         "common_secs, common_nsecs,\n\t\t\t"
1265                         "common_pid, common_comm)\n\n");
1266
1267                 fprintf(ofp, "\t\tprint \"");
1268
1269                 not_first = 0;
1270                 count = 0;
1271
1272                 for (f = event->format.fields; f; f = f->next) {
1273                         if (not_first++)
1274                                 fprintf(ofp, ", ");
1275                         if (count && count % 3 == 0) {
1276                                 fprintf(ofp, "\" \\\n\t\t\"");
1277                         }
1278                         count++;
1279
1280                         fprintf(ofp, "%s=", f->name);
1281                         if (f->flags & FIELD_IS_STRING ||
1282                             f->flags & FIELD_IS_FLAG ||
1283                             f->flags & FIELD_IS_ARRAY ||
1284                             f->flags & FIELD_IS_SYMBOLIC)
1285                                 fprintf(ofp, "%%s");
1286                         else if (f->flags & FIELD_IS_SIGNED)
1287                                 fprintf(ofp, "%%d");
1288                         else
1289                                 fprintf(ofp, "%%u");
1290                 }
1291
1292                 fprintf(ofp, "\" %% \\\n\t\t(");
1293
1294                 not_first = 0;
1295                 count = 0;
1296
1297                 for (f = event->format.fields; f; f = f->next) {
1298                         if (not_first++)
1299                                 fprintf(ofp, ", ");
1300
1301                         if (++count % 5 == 0)
1302                                 fprintf(ofp, "\n\t\t");
1303
1304                         if (f->flags & FIELD_IS_FLAG) {
1305                                 if ((count - 1) % 5 != 0) {
1306                                         fprintf(ofp, "\n\t\t");
1307                                         count = 4;
1308                                 }
1309                                 fprintf(ofp, "flag_str(\"");
1310                                 fprintf(ofp, "%s__%s\", ", event->system,
1311                                         event->name);
1312                                 fprintf(ofp, "\"%s\", %s)", f->name,
1313                                         f->name);
1314                         } else if (f->flags & FIELD_IS_SYMBOLIC) {
1315                                 if ((count - 1) % 5 != 0) {
1316                                         fprintf(ofp, "\n\t\t");
1317                                         count = 4;
1318                                 }
1319                                 fprintf(ofp, "symbol_str(\"");
1320                                 fprintf(ofp, "%s__%s\", ", event->system,
1321                                         event->name);
1322                                 fprintf(ofp, "\"%s\", %s)", f->name,
1323                                         f->name);
1324                         } else
1325                                 fprintf(ofp, "%s", f->name);
1326                 }
1327
1328                 fprintf(ofp, ")\n\n");
1329
1330                 fprintf(ofp, "\t\tfor node in common_callchain:");
1331                 fprintf(ofp, "\n\t\t\tif 'sym' in node:");
1332                 fprintf(ofp, "\n\t\t\t\tprint \"\\t[%%x] %%s\" %% (node['ip'], node['sym']['name'])");
1333                 fprintf(ofp, "\n\t\t\telse:");
1334                 fprintf(ofp, "\n\t\t\t\tprint \"\t[%%x]\" %% (node['ip'])\n\n");
1335                 fprintf(ofp, "\t\tprint \"\\n\"\n\n");
1336
1337         }
1338
1339         fprintf(ofp, "def trace_unhandled(event_name, context, "
1340                 "event_fields_dict):\n");
1341
1342         fprintf(ofp, "\t\tprint ' '.join(['%%s=%%s'%%(k,str(v))"
1343                 "for k,v in sorted(event_fields_dict.items())])\n\n");
1344
1345         fprintf(ofp, "def print_header("
1346                 "event_name, cpu, secs, nsecs, pid, comm):\n"
1347                 "\tprint \"%%-20s %%5u %%05u.%%09u %%8u %%-20s \" %% \\\n\t"
1348                 "(event_name, cpu, secs, nsecs, pid, comm),\n");
1349
1350         fclose(ofp);
1351
1352         fprintf(stderr, "generated Python script: %s\n", fname);
1353
1354         return 0;
1355 }
1356
1357 struct scripting_ops python_scripting_ops = {
1358         .name                   = "Python",
1359         .start_script           = python_start_script,
1360         .flush_script           = python_flush_script,
1361         .stop_script            = python_stop_script,
1362         .process_event          = python_process_event,
1363         .process_stat           = python_process_stat,
1364         .process_stat_interval  = python_process_stat_interval,
1365         .generate_script        = python_generate_script,
1366 };