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