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

   1 /*
   2  * trace-event-python.  Feed trace events to an embedded Python interpreter.
   3  *
   4  * Copyright (C) 2010 Tom Zanussi <[email protected]>
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  */
  21
  22 #include <Python.h>
  23
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <stdbool.h>
  28 #include <errno.h>
  29 #include <linux/bitmap.h>
  30 #include <linux/time64.h>
  31
  32 #include "../../perf.h"
  33 #include "../debug.h"
  34 #include "../callchain.h"
  35 #include "../evsel.h"
  36 #include "../util.h"
  37 #include "../event.h"
  38 #include "../thread.h"
  39 #include "../comm.h"
  40 #include "../machine.h"
  41 #include "../db-export.h"
  42 #include "../thread-stack.h"
  43 #include "../trace-event.h"
  44 #include "../machine.h"
  45 #include "../call-path.h"
  46 #include "thread_map.h"
  47 #include "cpumap.h"
  48 #include "stat.h"
  49
  50 PyMODINIT_FUNC initperf_trace_context(void);
  51
  52 #define TRACE_EVENT_TYPE_MAX                            \
  53         ((1 << (sizeof(unsigned short) * 8)) - 1)
  54
  55 static DECLARE_BITMAP(events_defined, TRACE_EVENT_TYPE_MAX);
  56
  57 #define MAX_FIELDS      64
  58 #define N_COMMON_FIELDS 7
  59
  60 extern struct scripting_context *scripting_context;
  61
  62 static char *cur_field_name;
  63 static int zero_flag_atom;
  64
  65 static PyObject *main_module, *main_dict;
  66
  67 struct tables {
  68         struct db_export        dbe;
  69         PyObject                *evsel_handler;
  70         PyObject                *machine_handler;
  71         PyObject                *thread_handler;
  72         PyObject                *comm_handler;
  73         PyObject                *comm_thread_handler;
  74         PyObject                *dso_handler;
  75         PyObject                *symbol_handler;
  76         PyObject                *branch_type_handler;
  77         PyObject                *sample_handler;
  78         PyObject                *call_path_handler;
  79         PyObject                *call_return_handler;
  80         bool                    db_export_mode;
  81 };
  82
  83 static struct tables tables_global;
  84
  85 static void handler_call_die(const char *handler_name) NORETURN;
  86 static void handler_call_die(const char *handler_name)
  87 {
  88         PyErr_Print();
  89         Py_FatalError("problem in Python trace event handler");
  90         // Py_FatalError does not return
  91         // but we have to make the compiler happy
  92         abort();
  93 }
  94
  95 /*
  96  * Insert val into into the dictionary and decrement the reference counter.
  97  * This is necessary for dictionaries since PyDict_SetItemString() does not
  98  * steal a reference, as opposed to PyTuple_SetItem().
  99  */
 100 static void pydict_set_item_string_decref(PyObject *dict, const char *key, PyObject *val)
 101 {
 102         PyDict_SetItemString(dict, key, val);
 103         Py_DECREF(val);
 104 }
 105
 106 static PyObject *get_handler(const char *handler_name)
 107 {
 108         PyObject *handler;
 109
 110         handler = PyDict_GetItemString(main_dict, handler_name);
 111         if (handler && !PyCallable_Check(handler))
 112                 return NULL;
 113         return handler;
 114 }
 115
 116 static void call_object(PyObject *handler, PyObject *args, const char *die_msg)
 117 {
 118         PyObject *retval;
 119
 120         retval = PyObject_CallObject(handler, args);
 121         if (retval == NULL)
 122                 handler_call_die(die_msg);
 123         Py_DECREF(retval);
 124 }
 125
 126 static void try_call_object(const char *handler_name, PyObject *args)
 127 {
 128         PyObject *handler;
 129
 130         handler = get_handler(handler_name);
 131         if (handler)
 132                 call_object(handler, args, handler_name);
 133 }
 134
 135 static void define_value(enum print_arg_type field_type,
 136                          const char *ev_name,
 137                          const char *field_name,
 138                          const char *field_value,
 139                          const char *field_str)
 140 {
 141         const char *handler_name = "define_flag_value";
 142         PyObject *t;
 143         unsigned long long value;
 144         unsigned n = 0;
 145
 146         if (field_type == PRINT_SYMBOL)
 147                 handler_name = "define_symbolic_value";
 148
 149         t = PyTuple_New(4);
 150         if (!t)
 151                 Py_FatalError("couldn't create Python tuple");
 152
 153         value = eval_flag(field_value);
 154
 155         PyTuple_SetItem(t, n++, PyString_FromString(ev_name));
 156         PyTuple_SetItem(t, n++, PyString_FromString(field_name));
 157         PyTuple_SetItem(t, n++, PyInt_FromLong(value));
 158         PyTuple_SetItem(t, n++, PyString_FromString(field_str));
 159
 160         try_call_object(handler_name, t);
 161
 162         Py_DECREF(t);
 163 }
 164
 165 static void define_values(enum print_arg_type field_type,
 166                           struct print_flag_sym *field,
 167                           const char *ev_name,
 168                           const char *field_name)
 169 {
 170         define_value(field_type, ev_name, field_name, field->value,
 171                      field->str);
 172
 173         if (field->next)
 174                 define_values(field_type, field->next, ev_name, field_name);
 175 }
 176
 177 static void define_field(enum print_arg_type field_type,
 178                          const char *ev_name,
 179                          const char *field_name,
 180                          const char *delim)
 181 {
 182         const char *handler_name = "define_flag_field";
 183         PyObject *t;
 184         unsigned n = 0;
 185
 186         if (field_type == PRINT_SYMBOL)
 187                 handler_name = "define_symbolic_field";
 188
 189         if (field_type == PRINT_FLAGS)
 190                 t = PyTuple_New(3);
 191         else
 192                 t = PyTuple_New(2);
 193         if (!t)
 194                 Py_FatalError("couldn't create Python tuple");
 195
 196         PyTuple_SetItem(t, n++, PyString_FromString(ev_name));
 197         PyTuple_SetItem(t, n++, PyString_FromString(field_name));
 198         if (field_type == PRINT_FLAGS)
 199                 PyTuple_SetItem(t, n++, PyString_FromString(delim));
 200
 201         try_call_object(handler_name, t);
 202
 203         Py_DECREF(t);
 204 }
 205
 206 static void define_event_symbols(struct event_format *event,
 207                                  const char *ev_name,
 208                                  struct print_arg *args)
 209 {
 210         if (args == NULL)
 211                 return;
 212
 213         switch (args->type) {
 214         case PRINT_NULL:
 215                 break;
 216         case PRINT_ATOM:
 217                 define_value(PRINT_FLAGS, ev_name, cur_field_name, "0",
 218                              args->atom.atom);
 219                 zero_flag_atom = 0;
 220                 break;
 221         case PRINT_FIELD:
 222                 free(cur_field_name);
 223                 cur_field_name = strdup(args->field.name);
 224                 break;
 225         case PRINT_FLAGS:
 226                 define_event_symbols(event, ev_name, args->flags.field);
 227                 define_field(PRINT_FLAGS, ev_name, cur_field_name,
 228                              args->flags.delim);
 229                 define_values(PRINT_FLAGS, args->flags.flags, ev_name,
 230                               cur_field_name);
 231                 break;
 232         case PRINT_SYMBOL:
 233                 define_event_symbols(event, ev_name, args->symbol.field);
 234                 define_field(PRINT_SYMBOL, ev_name, cur_field_name, NULL);
 235                 define_values(PRINT_SYMBOL, args->symbol.symbols, ev_name,
 236                               cur_field_name);
 237                 break;
 238         case PRINT_HEX:
 239         case PRINT_HEX_STR:
 240                 define_event_symbols(event, ev_name, args->hex.field);
 241                 define_event_symbols(event, ev_name, args->hex.size);
 242                 break;
 243         case PRINT_INT_ARRAY:
 244                 define_event_symbols(event, ev_name, args->int_array.field);
 245                 define_event_symbols(event, ev_name, args->int_array.count);
 246                 define_event_symbols(event, ev_name, args->int_array.el_size);
 247                 break;
 248         case PRINT_STRING:
 249                 break;
 250         case PRINT_TYPE:
 251                 define_event_symbols(event, ev_name, args->typecast.item);
 252                 break;
 253         case PRINT_OP:
 254                 if (strcmp(args->op.op, ":") == 0)
 255                         zero_flag_atom = 1;
 256                 define_event_symbols(event, ev_name, args->op.left);
 257                 define_event_symbols(event, ev_name, args->op.right);
 258                 break;
 259         default:
 260                 /* gcc warns for these? */
 261         case PRINT_BSTRING:
 262         case PRINT_DYNAMIC_ARRAY:
 263         case PRINT_DYNAMIC_ARRAY_LEN:
 264         case PRINT_FUNC:
 265         case PRINT_BITMASK:
 266                 /* we should warn... */
 267                 return;
 268         }
 269
 270         if (args->next)
 271                 define_event_symbols(event, ev_name, args->next);
 272 }
 273
 274 static PyObject *get_field_numeric_entry(struct event_format *event,
 275                 struct format_field *field, void *data)
 276 {
 277         bool is_array = field->flags & FIELD_IS_ARRAY;
 278         PyObject *obj = NULL, *list = NULL;
 279         unsigned long long val;
 280         unsigned int item_size, n_items, i;
 281
 282         if (is_array) {
 283                 list = PyList_New(field->arraylen);
 284                 item_size = field->size / field->arraylen;
 285                 n_items = field->arraylen;
 286         } else {
 287                 item_size = field->size;
 288                 n_items = 1;
 289         }
 290
 291         for (i = 0; i < n_items; i++) {
 292
 293                 val = read_size(event, data + field->offset + i * item_size,
 294                                 item_size);
 295                 if (field->flags & FIELD_IS_SIGNED) {
 296                         if ((long long)val >= LONG_MIN &&
 297                                         (long long)val <= LONG_MAX)
 298                                 obj = PyInt_FromLong(val);
 299                         else
 300                                 obj = PyLong_FromLongLong(val);
 301                 } else {
 302                         if (val <= LONG_MAX)
 303                                 obj = PyInt_FromLong(val);
 304                         else
 305                                 obj = PyLong_FromUnsignedLongLong(val);
 306                 }
 307                 if (is_array)
 308                         PyList_SET_ITEM(list, i, obj);
 309         }
 310         if (is_array)
 311                 obj = list;
 312         return obj;
 313 }
 314
 315
 316 static PyObject *python_process_callchain(struct perf_sample *sample,
 317                                          struct perf_evsel *evsel,
 318                                          struct addr_location *al)
 319 {
 320         PyObject *pylist;
 321
 322         pylist = PyList_New(0);
 323         if (!pylist)
 324                 Py_FatalError("couldn't create Python list");
 325
 326         if (!symbol_conf.use_callchain || !sample->callchain)
 327                 goto exit;
 328
 329         if (thread__resolve_callchain(al->thread, &callchain_cursor, evsel,
 330                                       sample, NULL, NULL,
 331                                       scripting_max_stack) != 0) {
 332                 pr_err("Failed to resolve callchain. Skipping\n");
 333                 goto exit;
 334         }
 335         callchain_cursor_commit(&callchain_cursor);
 336
 337
 338         while (1) {
 339                 PyObject *pyelem;
 340                 struct callchain_cursor_node *node;
 341                 node = callchain_cursor_current(&callchain_cursor);
 342                 if (!node)
 343                         break;
 344
 345                 pyelem = PyDict_New();
 346                 if (!pyelem)
 347                         Py_FatalError("couldn't create Python dictionary");
 348
 349
 350                 pydict_set_item_string_decref(pyelem, "ip",
 351                                 PyLong_FromUnsignedLongLong(node->ip));
 352
 353                 if (node->sym) {
 354                         PyObject *pysym  = PyDict_New();
 355                         if (!pysym)
 356                                 Py_FatalError("couldn't create Python dictionary");
 357                         pydict_set_item_string_decref(pysym, "start",
 358                                         PyLong_FromUnsignedLongLong(node->sym->start));
 359                         pydict_set_item_string_decref(pysym, "end",
 360                                         PyLong_FromUnsignedLongLong(node->sym->end));
 361                         pydict_set_item_string_decref(pysym, "binding",
 362                                         PyInt_FromLong(node->sym->binding));
 363                         pydict_set_item_string_decref(pysym, "name",
 364                                         PyString_FromStringAndSize(node->sym->name,
 365                                                         node->sym->namelen));
 366                         pydict_set_item_string_decref(pyelem, "sym", pysym);
 367                 }
 368
 369                 if (node->map) {
 370                         struct map *map = node->map;
 371                         const char *dsoname = "[unknown]";
 372                         if (map && map->dso) {
 373                                 if (symbol_conf.show_kernel_path && map->dso->long_name)
 374                                         dsoname = map->dso->long_name;
 375                                 else
 376                                         dsoname = map->dso->name;
 377                         }
 378                         pydict_set_item_string_decref(pyelem, "dso",
 379                                         PyString_FromString(dsoname));
 380                 }
 381
 382                 callchain_cursor_advance(&callchain_cursor);
 383                 PyList_Append(pylist, pyelem);
 384                 Py_DECREF(pyelem);
 385         }
 386
 387 exit:
 388         return pylist;
 389 }
 390
 391 static void python_process_tracepoint(struct perf_sample *sample,
 392                                       struct perf_evsel *evsel,
 393                                       struct addr_location *al)
 394 {
 395         struct event_format *event = evsel->tp_format;
 396         PyObject *handler, *context, *t, *obj = NULL, *callchain;
 397         PyObject *dict = NULL;
 398         static char handler_name[256];
 399         struct format_field *field;
 400         unsigned long s, ns;
 401         unsigned n = 0;
 402         int pid;
 403         int cpu = sample->cpu;
 404         void *data = sample->raw_data;
 405         unsigned long long nsecs = sample->time;
 406         const char *comm = thread__comm_str(al->thread);
 407
 408         t = PyTuple_New(MAX_FIELDS);
 409         if (!t)
 410                 Py_FatalError("couldn't create Python tuple");
 411
 412         if (!event) {
 413                 snprintf(handler_name, sizeof(handler_name),
 414                          "ug! no event found for type %" PRIu64, (u64)evsel->attr.config);
 415                 Py_FatalError(handler_name);
 416         }
 417
 418         pid = raw_field_value(event, "common_pid", data);
 419
 420         sprintf(handler_name, "%s__%s", event->system, event->name);
 421
 422         if (!test_and_set_bit(event->id, events_defined))
 423                 define_event_symbols(event, handler_name, event->print_fmt.args);
 424
 425         handler = get_handler(handler_name);
 426         if (!handler) {
 427                 dict = PyDict_New();
 428                 if (!dict)
 429                         Py_FatalError("couldn't create Python dict");
 430         }
 431         s = nsecs / NSEC_PER_SEC;
 432         ns = nsecs - s * NSEC_PER_SEC;
 433
 434         scripting_context->event_data = data;
 435         scripting_context->pevent = evsel->tp_format->pevent;
 436
 437         context = PyCObject_FromVoidPtr(scripting_context, NULL);
 438
 439         PyTuple_SetItem(t, n++, PyString_FromString(handler_name));
 440         PyTuple_SetItem(t, n++, context);
 441
 442         /* ip unwinding */
 443         callchain = python_process_callchain(sample, evsel, al);
 444
 445         if (handler) {
 446                 PyTuple_SetItem(t, n++, PyInt_FromLong(cpu));
 447                 PyTuple_SetItem(t, n++, PyInt_FromLong(s));
 448                 PyTuple_SetItem(t, n++, PyInt_FromLong(ns));
 449                 PyTuple_SetItem(t, n++, PyInt_FromLong(pid));
 450                 PyTuple_SetItem(t, n++, PyString_FromString(comm));
 451                 PyTuple_SetItem(t, n++, callchain);
 452         } else {
 453                 pydict_set_item_string_decref(dict, "common_cpu", PyInt_FromLong(cpu));
 454                 pydict_set_item_string_decref(dict, "common_s", PyInt_FromLong(s));
 455                 pydict_set_item_string_decref(dict, "common_ns", PyInt_FromLong(ns));
 456                 pydict_set_item_string_decref(dict, "common_pid", PyInt_FromLong(pid));
 457                 pydict_set_item_string_decref(dict, "common_comm", PyString_FromString(comm));
 458                 pydict_set_item_string_decref(dict, "common_callchain", callchain);
 459         }
 460         for (field = event->format.fields; field; field = field->next) {
 461                 unsigned int offset, len;
 462                 unsigned long long val;
 463
 464                 if (field->flags & FIELD_IS_ARRAY) {
 465                         offset = field->offset;
 466                         len    = field->size;
 467                         if (field->flags & FIELD_IS_DYNAMIC) {
 468                                 val     = pevent_read_number(scripting_context->pevent,
 469                                                              data + offset, len);
 470                                 offset  = val;
 471                                 len     = offset >> 16;
 472                                 offset &= 0xffff;
 473                         }
 474                         if (field->flags & FIELD_IS_STRING &&
 475                             is_printable_array(data + offset, len)) {
 476                                 obj = PyString_FromString((char *) data + offset);
 477                         } else {
 478                                 obj = PyByteArray_FromStringAndSize((const char *) data + offset, len);
 479                                 field->flags &= ~FIELD_IS_STRING;
 480                         }
 481                 } else { /* FIELD_IS_NUMERIC */
 482                         obj = get_field_numeric_entry(event, field, data);
 483                 }
 484                 if (handler)
 485                         PyTuple_SetItem(t, n++, obj);
 486                 else
 487                         pydict_set_item_string_decref(dict, field->name, obj);
 488
 489         }
 490
 491         if (!handler)
 492                 PyTuple_SetItem(t, n++, dict);
 493
 494         if (_PyTuple_Resize(&t, n) == -1)
 495                 Py_FatalError("error resizing Python tuple");
 496
 497         if (handler) {
 498                 call_object(handler, t, handler_name);
 499         } else {
 500                 try_call_object("trace_unhandled", t);
 501                 Py_DECREF(dict);
 502         }
 503
 504         Py_DECREF(t);
 505 }
 506
 507 static PyObject *tuple_new(unsigned int sz)
 508 {
 509         PyObject *t;
 510
 511         t = PyTuple_New(sz);
 512         if (!t)
 513                 Py_FatalError("couldn't create Python tuple");
 514         return t;
 515 }
 516
 517 static int tuple_set_u64(PyObject *t, unsigned int pos, u64 val)
 518 {
 519 #if BITS_PER_LONG == 64
 520         return PyTuple_SetItem(t, pos, PyInt_FromLong(val));
 521 #endif
 522 #if BITS_PER_LONG == 32
 523         return PyTuple_SetItem(t, pos, PyLong_FromLongLong(val));
 524 #endif
 525 }
 526
 527 static int tuple_set_s32(PyObject *t, unsigned int pos, s32 val)
 528 {
 529         return PyTuple_SetItem(t, pos, PyInt_FromLong(val));
 530 }
 531
 532 static int tuple_set_string(PyObject *t, unsigned int pos, const char *s)
 533 {
 534         return PyTuple_SetItem(t, pos, PyString_FromString(s));
 535 }
 536
 537 static int python_export_evsel(struct db_export *dbe, struct perf_evsel *evsel)
 538 {
 539         struct tables *tables = container_of(dbe, struct tables, dbe);
 540         PyObject *t;
 541
 542         t = tuple_new(2);
 543
 544         tuple_set_u64(t, 0, evsel->db_id);
 545         tuple_set_string(t, 1, perf_evsel__name(evsel));
 546
 547         call_object(tables->evsel_handler, t, "evsel_table");
 548
 549         Py_DECREF(t);
 550
 551         return 0;
 552 }
 553
 554 static int python_export_machine(struct db_export *dbe,
 555                                  struct machine *machine)
 556 {
 557         struct tables *tables = container_of(dbe, struct tables, dbe);
 558         PyObject *t;
 559
 560         t = tuple_new(3);
 561
 562         tuple_set_u64(t, 0, machine->db_id);
 563         tuple_set_s32(t, 1, machine->pid);
 564         tuple_set_string(t, 2, machine->root_dir ? machine->root_dir : "");
 565
 566         call_object(tables->machine_handler, t, "machine_table");
 567
 568         Py_DECREF(t);
 569
 570         return 0;
 571 }
 572
 573 static int python_export_thread(struct db_export *dbe, struct thread *thread,
 574                                 u64 main_thread_db_id, struct machine *machine)
 575 {
 576         struct tables *tables = container_of(dbe, struct tables, dbe);
 577         PyObject *t;
 578
 579         t = tuple_new(5);
 580
 581         tuple_set_u64(t, 0, thread->db_id);
 582         tuple_set_u64(t, 1, machine->db_id);
 583         tuple_set_u64(t, 2, main_thread_db_id);
 584         tuple_set_s32(t, 3, thread->pid_);
 585         tuple_set_s32(t, 4, thread->tid);
 586
 587         call_object(tables->thread_handler, t, "thread_table");
 588
 589         Py_DECREF(t);
 590
 591         return 0;
 592 }
 593
 594 static int python_export_comm(struct db_export *dbe, struct comm *comm)
 595 {
 596         struct tables *tables = container_of(dbe, struct tables, dbe);
 597         PyObject *t;
 598
 599         t = tuple_new(2);
 600
 601         tuple_set_u64(t, 0, comm->db_id);
 602         tuple_set_string(t, 1, comm__str(comm));
 603
 604         call_object(tables->comm_handler, t, "comm_table");
 605
 606         Py_DECREF(t);
 607
 608         return 0;
 609 }
 610
 611 static int python_export_comm_thread(struct db_export *dbe, u64 db_id,
 612                                      struct comm *comm, struct thread *thread)
 613 {
 614         struct tables *tables = container_of(dbe, struct tables, dbe);
 615         PyObject *t;
 616
 617         t = tuple_new(3);
 618
 619         tuple_set_u64(t, 0, db_id);
 620         tuple_set_u64(t, 1, comm->db_id);
 621         tuple_set_u64(t, 2, thread->db_id);
 622
 623         call_object(tables->comm_thread_handler, t, "comm_thread_table");
 624
 625         Py_DECREF(t);
 626
 627         return 0;
 628 }
 629
 630 static int python_export_dso(struct db_export *dbe, struct dso *dso,
 631                              struct machine *machine)
 632 {
 633         struct tables *tables = container_of(dbe, struct tables, dbe);
 634         char sbuild_id[SBUILD_ID_SIZE];
 635         PyObject *t;
 636
 637         build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id);
 638
 639         t = tuple_new(5);
 640
 641         tuple_set_u64(t, 0, dso->db_id);
 642         tuple_set_u64(t, 1, machine->db_id);
 643         tuple_set_string(t, 2, dso->short_name);
 644         tuple_set_string(t, 3, dso->long_name);
 645         tuple_set_string(t, 4, sbuild_id);
 646
 647         call_object(tables->dso_handler, t, "dso_table");
 648
 649         Py_DECREF(t);
 650
 651         return 0;
 652 }
 653
 654 static int python_export_symbol(struct db_export *dbe, struct symbol *sym,
 655                                 struct dso *dso)
 656 {
 657         struct tables *tables = container_of(dbe, struct tables, dbe);
 658         u64 *sym_db_id = symbol__priv(sym);
 659         PyObject *t;
 660
 661         t = tuple_new(6);
 662
 663         tuple_set_u64(t, 0, *sym_db_id);
 664         tuple_set_u64(t, 1, dso->db_id);
 665         tuple_set_u64(t, 2, sym->start);
 666         tuple_set_u64(t, 3, sym->end);
 667         tuple_set_s32(t, 4, sym->binding);
 668         tuple_set_string(t, 5, sym->name);
 669
 670         call_object(tables->symbol_handler, t, "symbol_table");
 671
 672         Py_DECREF(t);
 673
 674         return 0;
 675 }
 676
 677 static int python_export_branch_type(struct db_export *dbe, u32 branch_type,
 678                                      const char *name)
 679 {
 680         struct tables *tables = container_of(dbe, struct tables, dbe);
 681         PyObject *t;
 682
 683         t = tuple_new(2);
 684
 685         tuple_set_s32(t, 0, branch_type);
 686         tuple_set_string(t, 1, name);
 687
 688         call_object(tables->branch_type_handler, t, "branch_type_table");
 689
 690         Py_DECREF(t);
 691
 692         return 0;
 693 }
 694
 695 static int python_export_sample(struct db_export *dbe,
 696                                 struct export_sample *es)
 697 {
 698         struct tables *tables = container_of(dbe, struct tables, dbe);
 699         PyObject *t;
 700
 701         t = tuple_new(22);
 702
 703         tuple_set_u64(t, 0, es->db_id);
 704         tuple_set_u64(t, 1, es->evsel->db_id);
 705         tuple_set_u64(t, 2, es->al->machine->db_id);
 706         tuple_set_u64(t, 3, es->al->thread->db_id);
 707         tuple_set_u64(t, 4, es->comm_db_id);
 708         tuple_set_u64(t, 5, es->dso_db_id);
 709         tuple_set_u64(t, 6, es->sym_db_id);
 710         tuple_set_u64(t, 7, es->offset);
 711         tuple_set_u64(t, 8, es->sample->ip);
 712         tuple_set_u64(t, 9, es->sample->time);
 713         tuple_set_s32(t, 10, es->sample->cpu);
 714         tuple_set_u64(t, 11, es->addr_dso_db_id);
 715         tuple_set_u64(t, 12, es->addr_sym_db_id);
 716         tuple_set_u64(t, 13, es->addr_offset);
 717         tuple_set_u64(t, 14, es->sample->addr);
 718         tuple_set_u64(t, 15, es->sample->period);
 719         tuple_set_u64(t, 16, es->sample->weight);
 720         tuple_set_u64(t, 17, es->sample->transaction);
 721         tuple_set_u64(t, 18, es->sample->data_src);
 722         tuple_set_s32(t, 19, es->sample->flags & PERF_BRANCH_MASK);
 723         tuple_set_s32(t, 20, !!(es->sample->flags & PERF_IP_FLAG_IN_TX));
 724         tuple_set_u64(t, 21, es->call_path_id);
 725
 726         call_object(tables->sample_handler, t, "sample_table");
 727
 728         Py_DECREF(t);
 729
 730         return 0;
 731 }
 732
 733 static int python_export_call_path(struct db_export *dbe, struct call_path *cp)
 734 {
 735         struct tables *tables = container_of(dbe, struct tables, dbe);
 736         PyObject *t;
 737         u64 parent_db_id, sym_db_id;
 738
 739         parent_db_id = cp->parent ? cp->parent->db_id : 0;
 740         sym_db_id = cp->sym ? *(u64 *)symbol__priv(cp->sym) : 0;
 741
 742         t = tuple_new(4);
 743
 744         tuple_set_u64(t, 0, cp->db_id);
 745         tuple_set_u64(t, 1, parent_db_id);
 746         tuple_set_u64(t, 2, sym_db_id);
 747         tuple_set_u64(t, 3, cp->ip);
 748
 749         call_object(tables->call_path_handler, t, "call_path_table");
 750
 751         Py_DECREF(t);
 752
 753         return 0;
 754 }
 755
 756 static int python_export_call_return(struct db_export *dbe,
 757                                      struct call_return *cr)
 758 {
 759         struct tables *tables = container_of(dbe, struct tables, dbe);
 760         u64 comm_db_id = cr->comm ? cr->comm->db_id : 0;
 761         PyObject *t;
 762
 763         t = tuple_new(11);
 764
 765         tuple_set_u64(t, 0, cr->db_id);
 766         tuple_set_u64(t, 1, cr->thread->db_id);
 767         tuple_set_u64(t, 2, comm_db_id);
 768         tuple_set_u64(t, 3, cr->cp->db_id);
 769         tuple_set_u64(t, 4, cr->call_time);
 770         tuple_set_u64(t, 5, cr->return_time);
 771         tuple_set_u64(t, 6, cr->branch_count);
 772         tuple_set_u64(t, 7, cr->call_ref);
 773         tuple_set_u64(t, 8, cr->return_ref);
 774         tuple_set_u64(t, 9, cr->cp->parent->db_id);
 775         tuple_set_s32(t, 10, cr->flags);
 776
 777         call_object(tables->call_return_handler, t, "call_return_table");
 778
 779         Py_DECREF(t);
 780
 781         return 0;
 782 }
 783
 784 static int python_process_call_return(struct call_return *cr, void *data)
 785 {
 786         struct db_export *dbe = data;
 787
 788         return db_export__call_return(dbe, cr);
 789 }
 790
 791 static void python_process_general_event(struct perf_sample *sample,
 792                                          struct perf_evsel *evsel,
 793                                          struct addr_location *al)
 794 {
 795         PyObject *handler, *t, *dict, *callchain, *dict_sample;
 796         static char handler_name[64];
 797         unsigned n = 0;
 798
 799         /*
 800          * Use the MAX_FIELDS to make the function expandable, though
 801          * currently there is only one item for the tuple.
 802          */
 803         t = PyTuple_New(MAX_FIELDS);
 804         if (!t)
 805                 Py_FatalError("couldn't create Python tuple");
 806
 807         dict = PyDict_New();
 808         if (!dict)
 809                 Py_FatalError("couldn't create Python dictionary");
 810
 811         dict_sample = PyDict_New();
 812         if (!dict_sample)
 813                 Py_FatalError("couldn't create Python dictionary");
 814
 815         snprintf(handler_name, sizeof(handler_name), "%s", "process_event");
 816
 817         handler = get_handler(handler_name);
 818         if (!handler)
 819                 goto exit;
 820
 821         pydict_set_item_string_decref(dict, "ev_name", PyString_FromString(perf_evsel__name(evsel)));
 822         pydict_set_item_string_decref(dict, "attr", PyString_FromStringAndSize(
 823                         (const char *)&evsel->attr, sizeof(evsel->attr)));
 824
 825         pydict_set_item_string_decref(dict_sample, "pid",
 826                         PyInt_FromLong(sample->pid));
 827         pydict_set_item_string_decref(dict_sample, "tid",
 828                         PyInt_FromLong(sample->tid));
 829         pydict_set_item_string_decref(dict_sample, "cpu",
 830                         PyInt_FromLong(sample->cpu));
 831         pydict_set_item_string_decref(dict_sample, "ip",
 832                         PyLong_FromUnsignedLongLong(sample->ip));
 833         pydict_set_item_string_decref(dict_sample, "time",
 834                         PyLong_FromUnsignedLongLong(sample->time));
 835         pydict_set_item_string_decref(dict_sample, "period",
 836                         PyLong_FromUnsignedLongLong(sample->period));
 837         pydict_set_item_string_decref(dict, "sample", dict_sample);
 838
 839         pydict_set_item_string_decref(dict, "raw_buf", PyString_FromStringAndSize(
 840                         (const char *)sample->raw_data, sample->raw_size));
 841         pydict_set_item_string_decref(dict, "comm",
 842                         PyString_FromString(thread__comm_str(al->thread)));
 843         if (al->map) {
 844                 pydict_set_item_string_decref(dict, "dso",
 845                         PyString_FromString(al->map->dso->name));
 846         }
 847         if (al->sym) {
 848                 pydict_set_item_string_decref(dict, "symbol",
 849                         PyString_FromString(al->sym->name));
 850         }
 851
 852         /* ip unwinding */
 853         callchain = python_process_callchain(sample, evsel, al);
 854         pydict_set_item_string_decref(dict, "callchain", callchain);
 855
 856         PyTuple_SetItem(t, n++, dict);
 857         if (_PyTuple_Resize(&t, n) == -1)
 858                 Py_FatalError("error resizing Python tuple");
 859
 860         call_object(handler, t, handler_name);
 861 exit:
 862         Py_DECREF(dict);
 863         Py_DECREF(t);
 864 }
 865
 866 static void python_process_event(union perf_event *event,
 867                                  struct perf_sample *sample,
 868                                  struct perf_evsel *evsel,
 869                                  struct addr_location *al)
 870 {
 871         struct tables *tables = &tables_global;
 872
 873         switch (evsel->attr.type) {
 874         case PERF_TYPE_TRACEPOINT:
 875                 python_process_tracepoint(sample, evsel, al);
 876                 break;
 877         /* Reserve for future process_hw/sw/raw APIs */
 878         default:
 879                 if (tables->db_export_mode)
 880                         db_export__sample(&tables->dbe, event, sample, evsel, al);
 881                 else
 882                         python_process_general_event(sample, evsel, al);
 883         }
 884 }
 885
 886 static void get_handler_name(char *str, size_t size,
 887                              struct perf_evsel *evsel)
 888 {
 889         char *p = str;
 890
 891         scnprintf(str, size, "stat__%s", perf_evsel__name(evsel));
 892
 893         while ((p = strchr(p, ':'))) {
 894                 *p = '_';
 895                 p++;
 896         }
 897 }
 898
 899 static void
 900 process_stat(struct perf_evsel *counter, int cpu, int thread, u64 tstamp,
 901              struct perf_counts_values *count)
 902 {
 903         PyObject *handler, *t;
 904         static char handler_name[256];
 905         int n = 0;
 906
 907         t = PyTuple_New(MAX_FIELDS);
 908         if (!t)
 909                 Py_FatalError("couldn't create Python tuple");
 910
 911         get_handler_name(handler_name, sizeof(handler_name),
 912                          counter);
 913
 914         handler = get_handler(handler_name);
 915         if (!handler) {
 916                 pr_debug("can't find python handler %s\n", handler_name);
 917                 return;
 918         }
 919
 920         PyTuple_SetItem(t, n++, PyInt_FromLong(cpu));
 921         PyTuple_SetItem(t, n++, PyInt_FromLong(thread));
 922
 923         tuple_set_u64(t, n++, tstamp);
 924         tuple_set_u64(t, n++, count->val);
 925         tuple_set_u64(t, n++, count->ena);
 926         tuple_set_u64(t, n++, count->run);
 927
 928         if (_PyTuple_Resize(&t, n) == -1)
 929                 Py_FatalError("error resizing Python tuple");
 930
 931         call_object(handler, t, handler_name);
 932
 933         Py_DECREF(t);
 934 }
 935
 936 static void python_process_stat(struct perf_stat_config *config,
 937                                 struct perf_evsel *counter, u64 tstamp)
 938 {
 939         struct thread_map *threads = counter->threads;
 940         struct cpu_map *cpus = counter->cpus;
 941         int cpu, thread;
 942
 943         if (config->aggr_mode == AGGR_GLOBAL) {
 944                 process_stat(counter, -1, -1, tstamp,
 945                              &counter->counts->aggr);
 946                 return;
 947         }
 948
 949         for (thread = 0; thread < threads->nr; thread++) {
 950                 for (cpu = 0; cpu < cpus->nr; cpu++) {
 951                         process_stat(counter, cpus->map[cpu],
 952                                      thread_map__pid(threads, thread), tstamp,
 953                                      perf_counts(counter->counts, cpu, thread));
 954                 }
 955         }
 956 }
 957
 958 static void python_process_stat_interval(u64 tstamp)
 959 {
 960         PyObject *handler, *t;
 961         static const char handler_name[] = "stat__interval";
 962         int n = 0;
 963
 964         t = PyTuple_New(MAX_FIELDS);
 965         if (!t)
 966                 Py_FatalError("couldn't create Python tuple");
 967
 968         handler = get_handler(handler_name);
 969         if (!handler) {
 970                 pr_debug("can't find python handler %s\n", handler_name);
 971                 return;
 972         }
 973
 974         tuple_set_u64(t, n++, tstamp);
 975
 976         if (_PyTuple_Resize(&t, n) == -1)
 977                 Py_FatalError("error resizing Python tuple");
 978
 979         call_object(handler, t, handler_name);
 980
 981         Py_DECREF(t);
 982 }
 983
 984 static int run_start_sub(void)
 985 {
 986         main_module = PyImport_AddModule("__main__");
 987         if (main_module == NULL)
 988                 return -1;
 989         Py_INCREF(main_module);
 990
 991         main_dict = PyModule_GetDict(main_module);
 992         if (main_dict == NULL)
 993                 goto error;
 994         Py_INCREF(main_dict);
 995
 996         try_call_object("trace_begin", NULL);
 997
 998         return 0;
 999
1000 error:
1001         Py_XDECREF(main_dict);
1002         Py_XDECREF(main_module);
1003         return -1;
1004 }
1005
1006 #define SET_TABLE_HANDLER_(name, handler_name, table_name) do {         \
1007         tables->handler_name = get_handler(#table_name);                \
1008         if (tables->handler_name)                                       \
1009                 tables->dbe.export_ ## name = python_export_ ## name;   \
1010 } while (0)
1011
1012 #define SET_TABLE_HANDLER(name) \
1013         SET_TABLE_HANDLER_(name, name ## _handler, name ## _table)
1014
1015 static void set_table_handlers(struct tables *tables)
1016 {
1017         const char *perf_db_export_mode = "perf_db_export_mode";
1018         const char *perf_db_export_calls = "perf_db_export_calls";
1019         const char *perf_db_export_callchains = "perf_db_export_callchains";
1020         PyObject *db_export_mode, *db_export_calls, *db_export_callchains;
1021         bool export_calls = false;
1022         bool export_callchains = false;
1023         int ret;
1024
1025         memset(tables, 0, sizeof(struct tables));
1026         if (db_export__init(&tables->dbe))
1027                 Py_FatalError("failed to initialize export");
1028
1029         db_export_mode = PyDict_GetItemString(main_dict, perf_db_export_mode);
1030         if (!db_export_mode)
1031                 return;
1032
1033         ret = PyObject_IsTrue(db_export_mode);
1034         if (ret == -1)
1035                 handler_call_die(perf_db_export_mode);
1036         if (!ret)
1037                 return;
1038
1039         /* handle export calls */
1040         tables->dbe.crp = NULL;
1041         db_export_calls = PyDict_GetItemString(main_dict, perf_db_export_calls);
1042         if (db_export_calls) {
1043                 ret = PyObject_IsTrue(db_export_calls);
1044                 if (ret == -1)
1045                         handler_call_die(perf_db_export_calls);
1046                 export_calls = !!ret;
1047         }
1048
1049         if (export_calls) {
1050                 tables->dbe.crp =
1051                         call_return_processor__new(python_process_call_return,
1052                                                    &tables->dbe);
1053                 if (!tables->dbe.crp)
1054                         Py_FatalError("failed to create calls processor");
1055         }
1056
1057         /* handle export callchains */
1058         tables->dbe.cpr = NULL;
1059         db_export_callchains = PyDict_GetItemString(main_dict,
1060                                                     perf_db_export_callchains);
1061         if (db_export_callchains) {
1062                 ret = PyObject_IsTrue(db_export_callchains);
1063                 if (ret == -1)
1064                         handler_call_die(perf_db_export_callchains);
1065                 export_callchains = !!ret;
1066         }
1067
1068         if (export_callchains) {
1069                 /*
1070                  * Attempt to use the call path root from the call return
1071                  * processor, if the call return processor is in use. Otherwise,
1072                  * we allocate a new call path root. This prevents exporting
1073                  * duplicate call path ids when both are in use simultaniously.
1074                  */
1075                 if (tables->dbe.crp)
1076                         tables->dbe.cpr = tables->dbe.crp->cpr;
1077                 else
1078                         tables->dbe.cpr = call_path_root__new();
1079
1080                 if (!tables->dbe.cpr)
1081                         Py_FatalError("failed to create call path root");
1082         }
1083
1084         tables->db_export_mode = true;
1085         /*
1086          * Reserve per symbol space for symbol->db_id via symbol__priv()
1087          */
1088         symbol_conf.priv_size = sizeof(u64);
1089
1090         SET_TABLE_HANDLER(evsel);
1091         SET_TABLE_HANDLER(machine);
1092         SET_TABLE_HANDLER(thread);
1093         SET_TABLE_HANDLER(comm);
1094         SET_TABLE_HANDLER(comm_thread);
1095         SET_TABLE_HANDLER(dso);
1096         SET_TABLE_HANDLER(symbol);
1097         SET_TABLE_HANDLER(branch_type);
1098         SET_TABLE_HANDLER(sample);
1099         SET_TABLE_HANDLER(call_path);
1100         SET_TABLE_HANDLER(call_return);
1101 }
1102
1103 /*
1104  * Start trace script
1105  */
1106 static int python_start_script(const char *script, int argc, const char **argv)
1107 {
1108         struct tables *tables = &tables_global;
1109         const char **command_line;
1110         char buf[PATH_MAX];
1111         int i, err = 0;
1112         FILE *fp;
1113
1114         command_line = malloc((argc + 1) * sizeof(const char *));
1115         command_line[0] = script;
1116         for (i = 1; i < argc + 1; i++)
1117                 command_line[i] = argv[i - 1];
1118
1119         Py_Initialize();
1120
1121         initperf_trace_context();
1122
1123         PySys_SetArgv(argc + 1, (char **)command_line);
1124
1125         fp = fopen(script, "r");
1126         if (!fp) {
1127                 sprintf(buf, "Can't open python script \"%s\"", script);
1128                 perror(buf);
1129                 err = -1;
1130                 goto error;
1131         }
1132
1133         err = PyRun_SimpleFile(fp, script);
1134         if (err) {
1135                 fprintf(stderr, "Error running python script %s\n", script);
1136                 goto error;
1137         }
1138
1139         err = run_start_sub();
1140         if (err) {
1141                 fprintf(stderr, "Error starting python script %s\n", script);
1142                 goto error;
1143         }
1144
1145         set_table_handlers(tables);
1146
1147         if (tables->db_export_mode) {
1148                 err = db_export__branch_types(&tables->dbe);
1149                 if (err)
1150                         goto error;
1151         }
1152
1153         free(command_line);
1154
1155         return err;
1156 error:
1157         Py_Finalize();
1158         free(command_line);
1159
1160         return err;
1161 }
1162
1163 static int python_flush_script(void)
1164 {
1165         struct tables *tables = &tables_global;
1166
1167         return db_export__flush(&tables->dbe);
1168 }
1169
1170 /*
1171  * Stop trace script
1172  */
1173 static int python_stop_script(void)
1174 {
1175         struct tables *tables = &tables_global;
1176
1177         try_call_object("trace_end", NULL);
1178
1179         db_export__exit(&tables->dbe);
1180
1181         Py_XDECREF(main_dict);
1182         Py_XDECREF(main_module);
1183         Py_Finalize();
1184
1185         return 0;
1186 }
1187
1188 static int python_generate_script(struct pevent *pevent, const char *outfile)
1189 {
1190         struct event_format *event = NULL;
1191         struct format_field *f;
1192         char fname[PATH_MAX];
1193         int not_first, count;
1194         FILE *ofp;
1195
1196         sprintf(fname, "%s.py", outfile);
1197         ofp = fopen(fname, "w");
1198         if (ofp == NULL) {
1199                 fprintf(stderr, "couldn't open %s\n", fname);
1200                 return -1;
1201         }
1202         fprintf(ofp, "# perf script event handlers, "
1203                 "generated by perf script -g python\n");
1204
1205         fprintf(ofp, "# Licensed under the terms of the GNU GPL"
1206                 " License version 2\n\n");
1207
1208         fprintf(ofp, "# The common_* event handler fields are the most useful "
1209                 "fields common to\n");
1210
1211         fprintf(ofp, "# all events.  They don't necessarily correspond to "
1212                 "the 'common_*' fields\n");
1213
1214         fprintf(ofp, "# in the format files.  Those fields not available as "
1215                 "handler params can\n");
1216
1217         fprintf(ofp, "# be retrieved using Python functions of the form "
1218                 "common_*(context).\n");
1219
1220         fprintf(ofp, "# See the perf-trace-python Documentation for the list "
1221                 "of available functions.\n\n");
1222
1223         fprintf(ofp, "import os\n");
1224         fprintf(ofp, "import sys\n\n");
1225
1226         fprintf(ofp, "sys.path.append(os.environ['PERF_EXEC_PATH'] + \\\n");
1227         fprintf(ofp, "\t'/scripts/python/Perf-Trace-Util/lib/Perf/Trace')\n");
1228         fprintf(ofp, "\nfrom perf_trace_context import *\n");
1229         fprintf(ofp, "from Core import *\n\n\n");
1230
1231         fprintf(ofp, "def trace_begin():\n");
1232         fprintf(ofp, "\tprint \"in trace_begin\"\n\n");
1233
1234         fprintf(ofp, "def trace_end():\n");
1235         fprintf(ofp, "\tprint \"in trace_end\"\n\n");
1236
1237         while ((event = trace_find_next_event(pevent, event))) {
1238                 fprintf(ofp, "def %s__%s(", event->system, event->name);
1239                 fprintf(ofp, "event_name, ");
1240                 fprintf(ofp, "context, ");
1241                 fprintf(ofp, "common_cpu,\n");
1242                 fprintf(ofp, "\tcommon_secs, ");
1243                 fprintf(ofp, "common_nsecs, ");
1244                 fprintf(ofp, "common_pid, ");
1245                 fprintf(ofp, "common_comm,\n\t");
1246                 fprintf(ofp, "common_callchain, ");
1247
1248                 not_first = 0;
1249                 count = 0;
1250
1251                 for (f = event->format.fields; f; f = f->next) {
1252                         if (not_first++)
1253                                 fprintf(ofp, ", ");
1254                         if (++count % 5 == 0)
1255                                 fprintf(ofp, "\n\t");
1256
1257                         fprintf(ofp, "%s", f->name);
1258                 }
1259                 fprintf(ofp, "):\n");
1260
1261                 fprintf(ofp, "\t\tprint_header(event_name, common_cpu, "
1262                         "common_secs, common_nsecs,\n\t\t\t"
1263                         "common_pid, common_comm)\n\n");
1264
1265                 fprintf(ofp, "\t\tprint \"");
1266
1267                 not_first = 0;
1268                 count = 0;
1269
1270                 for (f = event->format.fields; f; f = f->next) {
1271                         if (not_first++)
1272                                 fprintf(ofp, ", ");
1273                         if (count && count % 3 == 0) {
1274                                 fprintf(ofp, "\" \\\n\t\t\"");
1275                         }
1276                         count++;
1277
1278                         fprintf(ofp, "%s=", f->name);
1279                         if (f->flags & FIELD_IS_STRING ||
1280                             f->flags & FIELD_IS_FLAG ||
1281                             f->flags & FIELD_IS_ARRAY ||
1282                             f->flags & FIELD_IS_SYMBOLIC)
1283                                 fprintf(ofp, "%%s");
1284                         else if (f->flags & FIELD_IS_SIGNED)
1285                                 fprintf(ofp, "%%d");
1286                         else
1287                                 fprintf(ofp, "%%u");
1288                 }
1289
1290                 fprintf(ofp, "\" %% \\\n\t\t(");
1291
1292                 not_first = 0;
1293                 count = 0;
1294
1295                 for (f = event->format.fields; f; f = f->next) {
1296                         if (not_first++)
1297                                 fprintf(ofp, ", ");
1298
1299                         if (++count % 5 == 0)
1300                                 fprintf(ofp, "\n\t\t");
1301
1302                         if (f->flags & FIELD_IS_FLAG) {
1303                                 if ((count - 1) % 5 != 0) {
1304                                         fprintf(ofp, "\n\t\t");
1305                                         count = 4;
1306                                 }
1307                                 fprintf(ofp, "flag_str(\"");
1308                                 fprintf(ofp, "%s__%s\", ", event->system,
1309                                         event->name);
1310                                 fprintf(ofp, "\"%s\", %s)", f->name,
1311                                         f->name);
1312                         } else if (f->flags & FIELD_IS_SYMBOLIC) {
1313                                 if ((count - 1) % 5 != 0) {
1314                                         fprintf(ofp, "\n\t\t");
1315                                         count = 4;
1316                                 }
1317                                 fprintf(ofp, "symbol_str(\"");
1318                                 fprintf(ofp, "%s__%s\", ", event->system,
1319                                         event->name);
1320                                 fprintf(ofp, "\"%s\", %s)", f->name,
1321                                         f->name);
1322                         } else
1323                                 fprintf(ofp, "%s", f->name);
1324                 }
1325
1326                 fprintf(ofp, ")\n\n");
1327
1328                 fprintf(ofp, "\t\tfor node in common_callchain:");
1329                 fprintf(ofp, "\n\t\t\tif 'sym' in node:");
1330                 fprintf(ofp, "\n\t\t\t\tprint \"\\t[%%x] %%s\" %% (node['ip'], node['sym']['name'])");
1331                 fprintf(ofp, "\n\t\t\telse:");
1332                 fprintf(ofp, "\n\t\t\t\tprint \"\t[%%x]\" %% (node['ip'])\n\n");
1333                 fprintf(ofp, "\t\tprint \"\\n\"\n\n");
1334
1335         }
1336
1337         fprintf(ofp, "def trace_unhandled(event_name, context, "
1338                 "event_fields_dict):\n");
1339
1340         fprintf(ofp, "\t\tprint ' '.join(['%%s=%%s'%%(k,str(v))"
1341                 "for k,v in sorted(event_fields_dict.items())])\n\n");
1342
1343         fprintf(ofp, "def print_header("
1344                 "event_name, cpu, secs, nsecs, pid, comm):\n"
1345                 "\tprint \"%%-20s %%5u %%05u.%%09u %%8u %%-20s \" %% \\\n\t"
1346                 "(event_name, cpu, secs, nsecs, pid, comm),\n");
1347
1348         fclose(ofp);
1349
1350         fprintf(stderr, "generated Python script: %s\n", fname);
1351
1352         return 0;
1353 }
1354
1355 struct scripting_ops python_scripting_ops = {
1356         .name                   = "Python",
1357         .start_script           = python_start_script,
1358         .flush_script           = python_flush_script,
1359         .stop_script            = python_stop_script,
1360         .process_event          = python_process_event,
1361         .process_stat           = python_process_stat,
1362         .process_stat_interval  = python_process_stat_interval,
1363         .generate_script        = python_generate_script,
1364 };