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 <inttypes.h>
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <stdbool.h>
  29 #include <errno.h>
  30 #include <linux/bitmap.h>
  31 #include <linux/compiler.h>
  32 #include <linux/time64.h>
  33
  34 #include "../../perf.h"
  35 #include "../debug.h"
  36 #include "../callchain.h"
  37 #include "../evsel.h"
  38 #include "../util.h"
  39 #include "../event.h"
  40 #include "../thread.h"
  41 #include "../comm.h"
  42 #include "../machine.h"
  43 #include "../db-export.h"
  44 #include "../thread-stack.h"
  45 #include "../trace-event.h"
  46 #include "../machine.h"
  47 #include "../call-path.h"
  48 #include "thread_map.h"
  49 #include "cpumap.h"
  50 #include "print_binary.h"
  51 #include "stat.h"
  52
  53 PyMODINIT_FUNC initperf_trace_context(void);
  54
  55 #define TRACE_EVENT_TYPE_MAX                            \
  56         ((1 << (sizeof(unsigned short) * 8)) - 1)
  57
  58 static DECLARE_BITMAP(events_defined, TRACE_EVENT_TYPE_MAX);
  59
  60 #define MAX_FIELDS      64
  61 #define N_COMMON_FIELDS 7
  62
  63 extern struct scripting_context *scripting_context;
  64
  65 static char *cur_field_name;
  66 static int zero_flag_atom;
  67
  68 static PyObject *main_module, *main_dict;
  69
  70 struct tables {
  71         struct db_export        dbe;
  72         PyObject                *evsel_handler;
  73         PyObject                *machine_handler;
  74         PyObject                *thread_handler;
  75         PyObject                *comm_handler;
  76         PyObject                *comm_thread_handler;
  77         PyObject                *dso_handler;
  78         PyObject                *symbol_handler;
  79         PyObject                *branch_type_handler;
  80         PyObject                *sample_handler;
  81         PyObject                *call_path_handler;
  82         PyObject                *call_return_handler;
  83         bool                    db_export_mode;
  84 };
  85
  86 static struct tables tables_global;
  87
  88 static void handler_call_die(const char *handler_name) __noreturn;
  89 static void handler_call_die(const char *handler_name)
  90 {
  91         PyErr_Print();
  92         Py_FatalError("problem in Python trace event handler");
  93         // Py_FatalError does not return
  94         // but we have to make the compiler happy
  95         abort();
  96 }
  97
  98 /*
  99  * Insert val into into the dictionary and decrement the reference counter.
 100  * This is necessary for dictionaries since PyDict_SetItemString() does not
 101  * steal a reference, as opposed to PyTuple_SetItem().
 102  */
 103 static void pydict_set_item_string_decref(PyObject *dict, const char *key, PyObject *val)
 104 {
 105         PyDict_SetItemString(dict, key, val);
 106         Py_DECREF(val);
 107 }
 108
 109 static PyObject *get_handler(const char *handler_name)
 110 {
 111         PyObject *handler;
 112
 113         handler = PyDict_GetItemString(main_dict, handler_name);
 114         if (handler && !PyCallable_Check(handler))
 115                 return NULL;
 116         return handler;
 117 }
 118
 119 static void call_object(PyObject *handler, PyObject *args, const char *die_msg)
 120 {
 121         PyObject *retval;
 122
 123         retval = PyObject_CallObject(handler, args);
 124         if (retval == NULL)
 125                 handler_call_die(die_msg);
 126         Py_DECREF(retval);
 127 }
 128
 129 static void try_call_object(const char *handler_name, PyObject *args)
 130 {
 131         PyObject *handler;
 132
 133         handler = get_handler(handler_name);
 134         if (handler)
 135                 call_object(handler, args, handler_name);
 136 }
 137
 138 static void define_value(enum print_arg_type field_type,
 139                          const char *ev_name,
 140                          const char *field_name,
 141                          const char *field_value,
 142                          const char *field_str)
 143 {
 144         const char *handler_name = "define_flag_value";
 145         PyObject *t;
 146         unsigned long long value;
 147         unsigned n = 0;
 148
 149         if (field_type == PRINT_SYMBOL)
 150                 handler_name = "define_symbolic_value";
 151
 152         t = PyTuple_New(4);
 153         if (!t)
 154                 Py_FatalError("couldn't create Python tuple");
 155
 156         value = eval_flag(field_value);
 157
 158         PyTuple_SetItem(t, n++, PyString_FromString(ev_name));
 159         PyTuple_SetItem(t, n++, PyString_FromString(field_name));
 160         PyTuple_SetItem(t, n++, PyInt_FromLong(value));
 161         PyTuple_SetItem(t, n++, PyString_FromString(field_str));
 162
 163         try_call_object(handler_name, t);
 164
 165         Py_DECREF(t);
 166 }
 167
 168 static void define_values(enum print_arg_type field_type,
 169                           struct print_flag_sym *field,
 170                           const char *ev_name,
 171                           const char *field_name)
 172 {
 173         define_value(field_type, ev_name, field_name, field->value,
 174                      field->str);
 175
 176         if (field->next)
 177                 define_values(field_type, field->next, ev_name, field_name);
 178 }
 179
 180 static void define_field(enum print_arg_type field_type,
 181                          const char *ev_name,
 182                          const char *field_name,
 183                          const char *delim)
 184 {
 185         const char *handler_name = "define_flag_field";
 186         PyObject *t;
 187         unsigned n = 0;
 188
 189         if (field_type == PRINT_SYMBOL)
 190                 handler_name = "define_symbolic_field";
 191
 192         if (field_type == PRINT_FLAGS)
 193                 t = PyTuple_New(3);
 194         else
 195                 t = PyTuple_New(2);
 196         if (!t)
 197                 Py_FatalError("couldn't create Python tuple");
 198
 199         PyTuple_SetItem(t, n++, PyString_FromString(ev_name));
 200         PyTuple_SetItem(t, n++, PyString_FromString(field_name));
 201         if (field_type == PRINT_FLAGS)
 202                 PyTuple_SetItem(t, n++, PyString_FromString(delim));
 203
 204         try_call_object(handler_name, t);
 205
 206         Py_DECREF(t);
 207 }
 208
 209 static void define_event_symbols(struct event_format *event,
 210                                  const char *ev_name,
 211                                  struct print_arg *args)
 212 {
 213         if (args == NULL)
 214                 return;
 215
 216         switch (args->type) {
 217         case PRINT_NULL:
 218                 break;
 219         case PRINT_ATOM:
 220                 define_value(PRINT_FLAGS, ev_name, cur_field_name, "0",
 221                              args->atom.atom);
 222                 zero_flag_atom = 0;
 223                 break;
 224         case PRINT_FIELD:
 225                 free(cur_field_name);
 226                 cur_field_name = strdup(args->field.name);
 227                 break;
 228         case PRINT_FLAGS:
 229                 define_event_symbols(event, ev_name, args->flags.field);
 230                 define_field(PRINT_FLAGS, ev_name, cur_field_name,
 231                              args->flags.delim);
 232                 define_values(PRINT_FLAGS, args->flags.flags, ev_name,
 233                               cur_field_name);
 234                 break;
 235         case PRINT_SYMBOL:
 236                 define_event_symbols(event, ev_name, args->symbol.field);
 237                 define_field(PRINT_SYMBOL, ev_name, cur_field_name, NULL);
 238                 define_values(PRINT_SYMBOL, args->symbol.symbols, ev_name,
 239                               cur_field_name);
 240                 break;
 241         case PRINT_HEX:
 242         case PRINT_HEX_STR:
 243                 define_event_symbols(event, ev_name, args->hex.field);
 244                 define_event_symbols(event, ev_name, args->hex.size);
 245                 break;
 246         case PRINT_INT_ARRAY:
 247                 define_event_symbols(event, ev_name, args->int_array.field);
 248                 define_event_symbols(event, ev_name, args->int_array.count);
 249                 define_event_symbols(event, ev_name, args->int_array.el_size);
 250                 break;
 251         case PRINT_STRING:
 252                 break;
 253         case PRINT_TYPE:
 254                 define_event_symbols(event, ev_name, args->typecast.item);
 255                 break;
 256         case PRINT_OP:
 257                 if (strcmp(args->op.op, ":") == 0)
 258                         zero_flag_atom = 1;
 259                 define_event_symbols(event, ev_name, args->op.left);
 260                 define_event_symbols(event, ev_name, args->op.right);
 261                 break;
 262         default:
 263                 /* gcc warns for these? */
 264         case PRINT_BSTRING:
 265         case PRINT_DYNAMIC_ARRAY:
 266         case PRINT_DYNAMIC_ARRAY_LEN:
 267         case PRINT_FUNC:
 268         case PRINT_BITMASK:
 269                 /* we should warn... */
 270                 return;
 271         }
 272
 273         if (args->next)
 274                 define_event_symbols(event, ev_name, args->next);
 275 }
 276
 277 static PyObject *get_field_numeric_entry(struct event_format *event,
 278                 struct format_field *field, void *data)
 279 {
 280         bool is_array = field->flags & FIELD_IS_ARRAY;
 281         PyObject *obj = NULL, *list = NULL;
 282         unsigned long long val;
 283         unsigned int item_size, n_items, i;
 284
 285         if (is_array) {
 286                 list = PyList_New(field->arraylen);
 287                 item_size = field->size / field->arraylen;
 288                 n_items = field->arraylen;
 289         } else {
 290                 item_size = field->size;
 291                 n_items = 1;
 292         }
 293
 294         for (i = 0; i < n_items; i++) {
 295
 296                 val = read_size(event, data + field->offset + i * item_size,
 297                                 item_size);
 298                 if (field->flags & FIELD_IS_SIGNED) {
 299                         if ((long long)val >= LONG_MIN &&
 300                                         (long long)val <= LONG_MAX)
 301                                 obj = PyInt_FromLong(val);
 302                         else
 303                                 obj = PyLong_FromLongLong(val);
 304                 } else {
 305                         if (val <= LONG_MAX)
 306                                 obj = PyInt_FromLong(val);
 307                         else
 308                                 obj = PyLong_FromUnsignedLongLong(val);
 309                 }
 310                 if (is_array)
 311                         PyList_SET_ITEM(list, i, obj);
 312         }
 313         if (is_array)
 314                 obj = list;
 315         return obj;
 316 }
 317
 318
 319 static PyObject *python_process_callchain(struct perf_sample *sample,
 320                                          struct perf_evsel *evsel,
 321                                          struct addr_location *al)
 322 {
 323         PyObject *pylist;
 324
 325         pylist = PyList_New(0);
 326         if (!pylist)
 327                 Py_FatalError("couldn't create Python list");
 328
 329         if (!symbol_conf.use_callchain || !sample->callchain)
 330                 goto exit;
 331
 332         if (thread__resolve_callchain(al->thread, &callchain_cursor, evsel,
 333                                       sample, NULL, NULL,
 334                                       scripting_max_stack) != 0) {
 335                 pr_err("Failed to resolve callchain. Skipping\n");
 336                 goto exit;
 337         }
 338         callchain_cursor_commit(&callchain_cursor);
 339
 340
 341         while (1) {
 342                 PyObject *pyelem;
 343                 struct callchain_cursor_node *node;
 344                 node = callchain_cursor_current(&callchain_cursor);
 345                 if (!node)
 346                         break;
 347
 348                 pyelem = PyDict_New();
 349                 if (!pyelem)
 350                         Py_FatalError("couldn't create Python dictionary");
 351
 352
 353                 pydict_set_item_string_decref(pyelem, "ip",
 354                                 PyLong_FromUnsignedLongLong(node->ip));
 355
 356                 if (node->sym) {
 357                         PyObject *pysym  = PyDict_New();
 358                         if (!pysym)
 359                                 Py_FatalError("couldn't create Python dictionary");
 360                         pydict_set_item_string_decref(pysym, "start",
 361                                         PyLong_FromUnsignedLongLong(node->sym->start));
 362                         pydict_set_item_string_decref(pysym, "end",
 363                                         PyLong_FromUnsignedLongLong(node->sym->end));
 364                         pydict_set_item_string_decref(pysym, "binding",
 365                                         PyInt_FromLong(node->sym->binding));
 366                         pydict_set_item_string_decref(pysym, "name",
 367                                         PyString_FromStringAndSize(node->sym->name,
 368                                                         node->sym->namelen));
 369                         pydict_set_item_string_decref(pyelem, "sym", pysym);
 370                 }
 371
 372                 if (node->map) {
 373                         struct map *map = node->map;
 374                         const char *dsoname = "[unknown]";
 375                         if (map && map->dso) {
 376                                 if (symbol_conf.show_kernel_path && map->dso->long_name)
 377                                         dsoname = map->dso->long_name;
 378                                 else
 379                                         dsoname = map->dso->name;
 380                         }
 381                         pydict_set_item_string_decref(pyelem, "dso",
 382                                         PyString_FromString(dsoname));
 383                 }
 384
 385                 callchain_cursor_advance(&callchain_cursor);
 386                 PyList_Append(pylist, pyelem);
 387                 Py_DECREF(pyelem);
 388         }
 389
 390 exit:
 391         return pylist;
 392 }
 393
 394 static void python_process_tracepoint(struct perf_sample *sample,
 395                                       struct perf_evsel *evsel,
 396                                       struct addr_location *al)
 397 {
 398         struct event_format *event = evsel->tp_format;
 399         PyObject *handler, *context, *t, *obj = NULL, *callchain;
 400         PyObject *dict = NULL;
 401         static char handler_name[256];
 402         struct format_field *field;
 403         unsigned long s, ns;
 404         unsigned n = 0;
 405         int pid;
 406         int cpu = sample->cpu;
 407         void *data = sample->raw_data;
 408         unsigned long long nsecs = sample->time;
 409         const char *comm = thread__comm_str(al->thread);
 410
 411         t = PyTuple_New(MAX_FIELDS);
 412         if (!t)
 413                 Py_FatalError("couldn't create Python tuple");
 414
 415         if (!event) {
 416                 snprintf(handler_name, sizeof(handler_name),
 417                          "ug! no event found for type %" PRIu64, (u64)evsel->attr.config);
 418                 Py_FatalError(handler_name);
 419         }
 420
 421         pid = raw_field_value(event, "common_pid", data);
 422
 423         sprintf(handler_name, "%s__%s", event->system, event->name);
 424
 425         if (!test_and_set_bit(event->id, events_defined))
 426                 define_event_symbols(event, handler_name, event->print_fmt.args);
 427
 428         handler = get_handler(handler_name);
 429         if (!handler) {
 430                 dict = PyDict_New();
 431                 if (!dict)
 432                         Py_FatalError("couldn't create Python dict");
 433         }
 434         s = nsecs / NSEC_PER_SEC;
 435         ns = nsecs - s * NSEC_PER_SEC;
 436
 437         scripting_context->event_data = data;
 438         scripting_context->pevent = evsel->tp_format->pevent;
 439
 440         context = PyCObject_FromVoidPtr(scripting_context, NULL);
 441
 442         PyTuple_SetItem(t, n++, PyString_FromString(handler_name));
 443         PyTuple_SetItem(t, n++, context);
 444
 445         /* ip unwinding */
 446         callchain = python_process_callchain(sample, evsel, al);
 447
 448         if (handler) {
 449                 PyTuple_SetItem(t, n++, PyInt_FromLong(cpu));
 450                 PyTuple_SetItem(t, n++, PyInt_FromLong(s));
 451                 PyTuple_SetItem(t, n++, PyInt_FromLong(ns));
 452                 PyTuple_SetItem(t, n++, PyInt_FromLong(pid));
 453                 PyTuple_SetItem(t, n++, PyString_FromString(comm));
 454                 PyTuple_SetItem(t, n++, callchain);
 455         } else {
 456                 pydict_set_item_string_decref(dict, "common_cpu", PyInt_FromLong(cpu));
 457                 pydict_set_item_string_decref(dict, "common_s", PyInt_FromLong(s));
 458                 pydict_set_item_string_decref(dict, "common_ns", PyInt_FromLong(ns));
 459                 pydict_set_item_string_decref(dict, "common_pid", PyInt_FromLong(pid));
 460                 pydict_set_item_string_decref(dict, "common_comm", PyString_FromString(comm));
 461                 pydict_set_item_string_decref(dict, "common_callchain", callchain);
 462         }
 463         for (field = event->format.fields; field; field = field->next) {
 464                 unsigned int offset, len;
 465                 unsigned long long val;
 466
 467                 if (field->flags & FIELD_IS_ARRAY) {
 468                         offset = field->offset;
 469                         len    = field->size;
 470                         if (field->flags & FIELD_IS_DYNAMIC) {
 471                                 val     = pevent_read_number(scripting_context->pevent,
 472                                                              data + offset, len);
 473                                 offset  = val;
 474                                 len     = offset >> 16;
 475                                 offset &= 0xffff;
 476                         }
 477                         if (field->flags & FIELD_IS_STRING &&
 478                             is_printable_array(data + offset, len)) {
 479                                 obj = PyString_FromString((char *) data + offset);
 480                         } else {
 481                                 obj = PyByteArray_FromStringAndSize((const char *) data + offset, len);
 482                                 field->flags &= ~FIELD_IS_STRING;
 483                         }
 484                 } else { /* FIELD_IS_NUMERIC */
 485                         obj = get_field_numeric_entry(event, field, data);
 486                 }
 487                 if (handler)
 488                         PyTuple_SetItem(t, n++, obj);
 489                 else
 490                         pydict_set_item_string_decref(dict, field->name, obj);
 491
 492         }
 493
 494         if (!handler)
 495                 PyTuple_SetItem(t, n++, dict);
 496
 497         if (_PyTuple_Resize(&t, n) == -1)
 498                 Py_FatalError("error resizing Python tuple");
 499
 500         if (handler) {
 501                 call_object(handler, t, handler_name);
 502         } else {
 503                 try_call_object("trace_unhandled", t);
 504                 Py_DECREF(dict);
 505         }
 506
 507         Py_DECREF(t);
 508 }
 509
 510 static PyObject *tuple_new(unsigned int sz)
 511 {
 512         PyObject *t;
 513
 514         t = PyTuple_New(sz);
 515         if (!t)
 516                 Py_FatalError("couldn't create Python tuple");
 517         return t;
 518 }
 519
 520 static int tuple_set_u64(PyObject *t, unsigned int pos, u64 val)
 521 {
 522 #if BITS_PER_LONG == 64
 523         return PyTuple_SetItem(t, pos, PyInt_FromLong(val));
 524 #endif
 525 #if BITS_PER_LONG == 32
 526         return PyTuple_SetItem(t, pos, PyLong_FromLongLong(val));
 527 #endif
 528 }
 529
 530 static int tuple_set_s32(PyObject *t, unsigned int pos, s32 val)
 531 {
 532         return PyTuple_SetItem(t, pos, PyInt_FromLong(val));
 533 }
 534
 535 static int tuple_set_string(PyObject *t, unsigned int pos, const char *s)
 536 {
 537         return PyTuple_SetItem(t, pos, PyString_FromString(s));
 538 }
 539
 540 static int python_export_evsel(struct db_export *dbe, struct perf_evsel *evsel)
 541 {
 542         struct tables *tables = container_of(dbe, struct tables, dbe);
 543         PyObject *t;
 544
 545         t = tuple_new(2);
 546
 547         tuple_set_u64(t, 0, evsel->db_id);
 548         tuple_set_string(t, 1, perf_evsel__name(evsel));
 549
 550         call_object(tables->evsel_handler, t, "evsel_table");
 551
 552         Py_DECREF(t);
 553
 554         return 0;
 555 }
 556
 557 static int python_export_machine(struct db_export *dbe,
 558                                  struct machine *machine)
 559 {
 560         struct tables *tables = container_of(dbe, struct tables, dbe);
 561         PyObject *t;
 562
 563         t = tuple_new(3);
 564
 565         tuple_set_u64(t, 0, machine->db_id);
 566         tuple_set_s32(t, 1, machine->pid);
 567         tuple_set_string(t, 2, machine->root_dir ? machine->root_dir : "");
 568
 569         call_object(tables->machine_handler, t, "machine_table");
 570
 571         Py_DECREF(t);
 572
 573         return 0;
 574 }
 575
 576 static int python_export_thread(struct db_export *dbe, struct thread *thread,
 577                                 u64 main_thread_db_id, struct machine *machine)
 578 {
 579         struct tables *tables = container_of(dbe, struct tables, dbe);
 580         PyObject *t;
 581
 582         t = tuple_new(5);
 583
 584         tuple_set_u64(t, 0, thread->db_id);
 585         tuple_set_u64(t, 1, machine->db_id);
 586         tuple_set_u64(t, 2, main_thread_db_id);
 587         tuple_set_s32(t, 3, thread->pid_);
 588         tuple_set_s32(t, 4, thread->tid);
 589
 590         call_object(tables->thread_handler, t, "thread_table");
 591
 592         Py_DECREF(t);
 593
 594         return 0;
 595 }
 596
 597 static int python_export_comm(struct db_export *dbe, struct comm *comm)
 598 {
 599         struct tables *tables = container_of(dbe, struct tables, dbe);
 600         PyObject *t;
 601
 602         t = tuple_new(2);
 603
 604         tuple_set_u64(t, 0, comm->db_id);
 605         tuple_set_string(t, 1, comm__str(comm));
 606
 607         call_object(tables->comm_handler, t, "comm_table");
 608
 609         Py_DECREF(t);
 610
 611         return 0;
 612 }
 613
 614 static int python_export_comm_thread(struct db_export *dbe, u64 db_id,
 615                                      struct comm *comm, struct thread *thread)
 616 {
 617         struct tables *tables = container_of(dbe, struct tables, dbe);
 618         PyObject *t;
 619
 620         t = tuple_new(3);
 621
 622         tuple_set_u64(t, 0, db_id);
 623         tuple_set_u64(t, 1, comm->db_id);
 624         tuple_set_u64(t, 2, thread->db_id);
 625
 626         call_object(tables->comm_thread_handler, t, "comm_thread_table");
 627
 628         Py_DECREF(t);
 629
 630         return 0;
 631 }
 632
 633 static int python_export_dso(struct db_export *dbe, struct dso *dso,
 634                              struct machine *machine)
 635 {
 636         struct tables *tables = container_of(dbe, struct tables, dbe);
 637         char sbuild_id[SBUILD_ID_SIZE];
 638         PyObject *t;
 639
 640         build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id);
 641
 642         t = tuple_new(5);
 643
 644         tuple_set_u64(t, 0, dso->db_id);
 645         tuple_set_u64(t, 1, machine->db_id);
 646         tuple_set_string(t, 2, dso->short_name);
 647         tuple_set_string(t, 3, dso->long_name);
 648         tuple_set_string(t, 4, sbuild_id);
 649
 650         call_object(tables->dso_handler, t, "dso_table");
 651
 652         Py_DECREF(t);
 653
 654         return 0;
 655 }
 656
 657 static int python_export_symbol(struct db_export *dbe, struct symbol *sym,
 658                                 struct dso *dso)
 659 {
 660         struct tables *tables = container_of(dbe, struct tables, dbe);
 661         u64 *sym_db_id = symbol__priv(sym);
 662         PyObject *t;
 663
 664         t = tuple_new(6);
 665
 666         tuple_set_u64(t, 0, *sym_db_id);
 667         tuple_set_u64(t, 1, dso->db_id);
 668         tuple_set_u64(t, 2, sym->start);
 669         tuple_set_u64(t, 3, sym->end);
 670         tuple_set_s32(t, 4, sym->binding);
 671         tuple_set_string(t, 5, sym->name);
 672
 673         call_object(tables->symbol_handler, t, "symbol_table");
 674
 675         Py_DECREF(t);
 676
 677         return 0;
 678 }
 679
 680 static int python_export_branch_type(struct db_export *dbe, u32 branch_type,
 681                                      const char *name)
 682 {
 683         struct tables *tables = container_of(dbe, struct tables, dbe);
 684         PyObject *t;
 685
 686         t = tuple_new(2);
 687
 688         tuple_set_s32(t, 0, branch_type);
 689         tuple_set_string(t, 1, name);
 690
 691         call_object(tables->branch_type_handler, t, "branch_type_table");
 692
 693         Py_DECREF(t);
 694
 695         return 0;
 696 }
 697
 698 static int python_export_sample(struct db_export *dbe,
 699                                 struct export_sample *es)
 700 {
 701         struct tables *tables = container_of(dbe, struct tables, dbe);
 702         PyObject *t;
 703
 704         t = tuple_new(22);
 705
 706         tuple_set_u64(t, 0, es->db_id);
 707         tuple_set_u64(t, 1, es->evsel->db_id);
 708         tuple_set_u64(t, 2, es->al->machine->db_id);
 709         tuple_set_u64(t, 3, es->al->thread->db_id);
 710         tuple_set_u64(t, 4, es->comm_db_id);
 711         tuple_set_u64(t, 5, es->dso_db_id);
 712         tuple_set_u64(t, 6, es->sym_db_id);
 713         tuple_set_u64(t, 7, es->offset);
 714         tuple_set_u64(t, 8, es->sample->ip);
 715         tuple_set_u64(t, 9, es->sample->time);
 716         tuple_set_s32(t, 10, es->sample->cpu);
 717         tuple_set_u64(t, 11, es->addr_dso_db_id);
 718         tuple_set_u64(t, 12, es->addr_sym_db_id);
 719         tuple_set_u64(t, 13, es->addr_offset);
 720         tuple_set_u64(t, 14, es->sample->addr);
 721         tuple_set_u64(t, 15, es->sample->period);
 722         tuple_set_u64(t, 16, es->sample->weight);
 723         tuple_set_u64(t, 17, es->sample->transaction);
 724         tuple_set_u64(t, 18, es->sample->data_src);
 725         tuple_set_s32(t, 19, es->sample->flags & PERF_BRANCH_MASK);
 726         tuple_set_s32(t, 20, !!(es->sample->flags & PERF_IP_FLAG_IN_TX));
 727         tuple_set_u64(t, 21, es->call_path_id);
 728
 729         call_object(tables->sample_handler, t, "sample_table");
 730
 731         Py_DECREF(t);
 732
 733         return 0;
 734 }
 735
 736 static int python_export_call_path(struct db_export *dbe, struct call_path *cp)
 737 {
 738         struct tables *tables = container_of(dbe, struct tables, dbe);
 739         PyObject *t;
 740         u64 parent_db_id, sym_db_id;
 741
 742         parent_db_id = cp->parent ? cp->parent->db_id : 0;
 743         sym_db_id = cp->sym ? *(u64 *)symbol__priv(cp->sym) : 0;
 744
 745         t = tuple_new(4);
 746
 747         tuple_set_u64(t, 0, cp->db_id);
 748         tuple_set_u64(t, 1, parent_db_id);
 749         tuple_set_u64(t, 2, sym_db_id);
 750         tuple_set_u64(t, 3, cp->ip);
 751
 752         call_object(tables->call_path_handler, t, "call_path_table");
 753
 754         Py_DECREF(t);
 755
 756         return 0;
 757 }
 758
 759 static int python_export_call_return(struct db_export *dbe,
 760                                      struct call_return *cr)
 761 {
 762         struct tables *tables = container_of(dbe, struct tables, dbe);
 763         u64 comm_db_id = cr->comm ? cr->comm->db_id : 0;
 764         PyObject *t;
 765
 766         t = tuple_new(11);
 767
 768         tuple_set_u64(t, 0, cr->db_id);
 769         tuple_set_u64(t, 1, cr->thread->db_id);
 770         tuple_set_u64(t, 2, comm_db_id);
 771         tuple_set_u64(t, 3, cr->cp->db_id);
 772         tuple_set_u64(t, 4, cr->call_time);
 773         tuple_set_u64(t, 5, cr->return_time);
 774         tuple_set_u64(t, 6, cr->branch_count);
 775         tuple_set_u64(t, 7, cr->call_ref);
 776         tuple_set_u64(t, 8, cr->return_ref);
 777         tuple_set_u64(t, 9, cr->cp->parent->db_id);
 778         tuple_set_s32(t, 10, cr->flags);
 779
 780         call_object(tables->call_return_handler, t, "call_return_table");
 781
 782         Py_DECREF(t);
 783
 784         return 0;
 785 }
 786
 787 static int python_process_call_return(struct call_return *cr, void *data)
 788 {
 789         struct db_export *dbe = data;
 790
 791         return db_export__call_return(dbe, cr);
 792 }
 793
 794 static void python_process_general_event(struct perf_sample *sample,
 795                                          struct perf_evsel *evsel,
 796                                          struct addr_location *al)
 797 {
 798         PyObject *handler, *t, *dict, *callchain, *dict_sample;
 799         static char handler_name[64];
 800         unsigned n = 0;
 801
 802         /*
 803          * Use the MAX_FIELDS to make the function expandable, though
 804          * currently there is only one item for the tuple.
 805          */
 806         t = PyTuple_New(MAX_FIELDS);
 807         if (!t)
 808                 Py_FatalError("couldn't create Python tuple");
 809
 810         dict = PyDict_New();
 811         if (!dict)
 812                 Py_FatalError("couldn't create Python dictionary");
 813
 814         dict_sample = PyDict_New();
 815         if (!dict_sample)
 816                 Py_FatalError("couldn't create Python dictionary");
 817
 818         snprintf(handler_name, sizeof(handler_name), "%s", "process_event");
 819
 820         handler = get_handler(handler_name);
 821         if (!handler)
 822                 goto exit;
 823
 824         pydict_set_item_string_decref(dict, "ev_name", PyString_FromString(perf_evsel__name(evsel)));
 825         pydict_set_item_string_decref(dict, "attr", PyString_FromStringAndSize(
 826                         (const char *)&evsel->attr, sizeof(evsel->attr)));
 827
 828         pydict_set_item_string_decref(dict_sample, "pid",
 829                         PyInt_FromLong(sample->pid));
 830         pydict_set_item_string_decref(dict_sample, "tid",
 831                         PyInt_FromLong(sample->tid));
 832         pydict_set_item_string_decref(dict_sample, "cpu",
 833                         PyInt_FromLong(sample->cpu));
 834         pydict_set_item_string_decref(dict_sample, "ip",
 835                         PyLong_FromUnsignedLongLong(sample->ip));
 836         pydict_set_item_string_decref(dict_sample, "time",
 837                         PyLong_FromUnsignedLongLong(sample->time));
 838         pydict_set_item_string_decref(dict_sample, "period",
 839                         PyLong_FromUnsignedLongLong(sample->period));
 840         pydict_set_item_string_decref(dict, "sample", dict_sample);
 841
 842         pydict_set_item_string_decref(dict, "raw_buf", PyString_FromStringAndSize(
 843                         (const char *)sample->raw_data, sample->raw_size));
 844         pydict_set_item_string_decref(dict, "comm",
 845                         PyString_FromString(thread__comm_str(al->thread)));
 846         if (al->map) {
 847                 pydict_set_item_string_decref(dict, "dso",
 848                         PyString_FromString(al->map->dso->name));
 849         }
 850         if (al->sym) {
 851                 pydict_set_item_string_decref(dict, "symbol",
 852                         PyString_FromString(al->sym->name));
 853         }
 854
 855         /* ip unwinding */
 856         callchain = python_process_callchain(sample, evsel, al);
 857         pydict_set_item_string_decref(dict, "callchain", callchain);
 858
 859         PyTuple_SetItem(t, n++, dict);
 860         if (_PyTuple_Resize(&t, n) == -1)
 861                 Py_FatalError("error resizing Python tuple");
 862
 863         call_object(handler, t, handler_name);
 864 exit:
 865         Py_DECREF(dict);
 866         Py_DECREF(t);
 867 }
 868
 869 static void python_process_event(union perf_event *event,
 870                                  struct perf_sample *sample,
 871                                  struct perf_evsel *evsel,
 872                                  struct addr_location *al)
 873 {
 874         struct tables *tables = &tables_global;
 875
 876         switch (evsel->attr.type) {
 877         case PERF_TYPE_TRACEPOINT:
 878                 python_process_tracepoint(sample, evsel, al);
 879                 break;
 880         /* Reserve for future process_hw/sw/raw APIs */
 881         default:
 882                 if (tables->db_export_mode)
 883                         db_export__sample(&tables->dbe, event, sample, evsel, al);
 884                 else
 885                         python_process_general_event(sample, evsel, al);
 886         }
 887 }
 888
 889 static void get_handler_name(char *str, size_t size,
 890                              struct perf_evsel *evsel)
 891 {
 892         char *p = str;
 893
 894         scnprintf(str, size, "stat__%s", perf_evsel__name(evsel));
 895
 896         while ((p = strchr(p, ':'))) {
 897                 *p = '_';
 898                 p++;
 899         }
 900 }
 901
 902 static void
 903 process_stat(struct perf_evsel *counter, int cpu, int thread, u64 tstamp,
 904              struct perf_counts_values *count)
 905 {
 906         PyObject *handler, *t;
 907         static char handler_name[256];
 908         int n = 0;
 909
 910         t = PyTuple_New(MAX_FIELDS);
 911         if (!t)
 912                 Py_FatalError("couldn't create Python tuple");
 913
 914         get_handler_name(handler_name, sizeof(handler_name),
 915                          counter);
 916
 917         handler = get_handler(handler_name);
 918         if (!handler) {
 919                 pr_debug("can't find python handler %s\n", handler_name);
 920                 return;
 921         }
 922
 923         PyTuple_SetItem(t, n++, PyInt_FromLong(cpu));
 924         PyTuple_SetItem(t, n++, PyInt_FromLong(thread));
 925
 926         tuple_set_u64(t, n++, tstamp);
 927         tuple_set_u64(t, n++, count->val);
 928         tuple_set_u64(t, n++, count->ena);
 929         tuple_set_u64(t, n++, count->run);
 930
 931         if (_PyTuple_Resize(&t, n) == -1)
 932                 Py_FatalError("error resizing Python tuple");
 933
 934         call_object(handler, t, handler_name);
 935
 936         Py_DECREF(t);
 937 }
 938
 939 static void python_process_stat(struct perf_stat_config *config,
 940                                 struct perf_evsel *counter, u64 tstamp)
 941 {
 942         struct thread_map *threads = counter->threads;
 943         struct cpu_map *cpus = counter->cpus;
 944         int cpu, thread;
 945
 946         if (config->aggr_mode == AGGR_GLOBAL) {
 947                 process_stat(counter, -1, -1, tstamp,
 948                              &counter->counts->aggr);
 949                 return;
 950         }
 951
 952         for (thread = 0; thread < threads->nr; thread++) {
 953                 for (cpu = 0; cpu < cpus->nr; cpu++) {
 954                         process_stat(counter, cpus->map[cpu],
 955                                      thread_map__pid(threads, thread), tstamp,
 956                                      perf_counts(counter->counts, cpu, thread));
 957                 }
 958         }
 959 }
 960
 961 static void python_process_stat_interval(u64 tstamp)
 962 {
 963         PyObject *handler, *t;
 964         static const char handler_name[] = "stat__interval";
 965         int n = 0;
 966
 967         t = PyTuple_New(MAX_FIELDS);
 968         if (!t)
 969                 Py_FatalError("couldn't create Python tuple");
 970
 971         handler = get_handler(handler_name);
 972         if (!handler) {
 973                 pr_debug("can't find python handler %s\n", handler_name);
 974                 return;
 975         }
 976
 977         tuple_set_u64(t, n++, tstamp);
 978
 979         if (_PyTuple_Resize(&t, n) == -1)
 980                 Py_FatalError("error resizing Python tuple");
 981
 982         call_object(handler, t, handler_name);
 983
 984         Py_DECREF(t);
 985 }
 986
 987 static int run_start_sub(void)
 988 {
 989         main_module = PyImport_AddModule("__main__");
 990         if (main_module == NULL)
 991                 return -1;
 992         Py_INCREF(main_module);
 993
 994         main_dict = PyModule_GetDict(main_module);
 995         if (main_dict == NULL)
 996                 goto error;
 997         Py_INCREF(main_dict);
 998
 999         try_call_object("trace_begin", NULL);
1000
1001         return 0;
1002
1003 error:
1004         Py_XDECREF(main_dict);
1005         Py_XDECREF(main_module);
1006         return -1;
1007 }
1008
1009 #define SET_TABLE_HANDLER_(name, handler_name, table_name) do {         \
1010         tables->handler_name = get_handler(#table_name);                \
1011         if (tables->handler_name)                                       \
1012                 tables->dbe.export_ ## name = python_export_ ## name;   \
1013 } while (0)
1014
1015 #define SET_TABLE_HANDLER(name) \
1016         SET_TABLE_HANDLER_(name, name ## _handler, name ## _table)
1017
1018 static void set_table_handlers(struct tables *tables)
1019 {
1020         const char *perf_db_export_mode = "perf_db_export_mode";
1021         const char *perf_db_export_calls = "perf_db_export_calls";
1022         const char *perf_db_export_callchains = "perf_db_export_callchains";
1023         PyObject *db_export_mode, *db_export_calls, *db_export_callchains;
1024         bool export_calls = false;
1025         bool export_callchains = false;
1026         int ret;
1027
1028         memset(tables, 0, sizeof(struct tables));
1029         if (db_export__init(&tables->dbe))
1030                 Py_FatalError("failed to initialize export");
1031
1032         db_export_mode = PyDict_GetItemString(main_dict, perf_db_export_mode);
1033         if (!db_export_mode)
1034                 return;
1035
1036         ret = PyObject_IsTrue(db_export_mode);
1037         if (ret == -1)
1038                 handler_call_die(perf_db_export_mode);
1039         if (!ret)
1040                 return;
1041
1042         /* handle export calls */
1043         tables->dbe.crp = NULL;
1044         db_export_calls = PyDict_GetItemString(main_dict, perf_db_export_calls);
1045         if (db_export_calls) {
1046                 ret = PyObject_IsTrue(db_export_calls);
1047                 if (ret == -1)
1048                         handler_call_die(perf_db_export_calls);
1049                 export_calls = !!ret;
1050         }
1051
1052         if (export_calls) {
1053                 tables->dbe.crp =
1054                         call_return_processor__new(python_process_call_return,
1055                                                    &tables->dbe);
1056                 if (!tables->dbe.crp)
1057                         Py_FatalError("failed to create calls processor");
1058         }
1059
1060         /* handle export callchains */
1061         tables->dbe.cpr = NULL;
1062         db_export_callchains = PyDict_GetItemString(main_dict,
1063                                                     perf_db_export_callchains);
1064         if (db_export_callchains) {
1065                 ret = PyObject_IsTrue(db_export_callchains);
1066                 if (ret == -1)
1067                         handler_call_die(perf_db_export_callchains);
1068                 export_callchains = !!ret;
1069         }
1070
1071         if (export_callchains) {
1072                 /*
1073                  * Attempt to use the call path root from the call return
1074                  * processor, if the call return processor is in use. Otherwise,
1075                  * we allocate a new call path root. This prevents exporting
1076                  * duplicate call path ids when both are in use simultaniously.
1077                  */
1078                 if (tables->dbe.crp)
1079                         tables->dbe.cpr = tables->dbe.crp->cpr;
1080                 else
1081                         tables->dbe.cpr = call_path_root__new();
1082
1083                 if (!tables->dbe.cpr)
1084                         Py_FatalError("failed to create call path root");
1085         }
1086
1087         tables->db_export_mode = true;
1088         /*
1089          * Reserve per symbol space for symbol->db_id via symbol__priv()
1090          */
1091         symbol_conf.priv_size = sizeof(u64);
1092
1093         SET_TABLE_HANDLER(evsel);
1094         SET_TABLE_HANDLER(machine);
1095         SET_TABLE_HANDLER(thread);
1096         SET_TABLE_HANDLER(comm);
1097         SET_TABLE_HANDLER(comm_thread);
1098         SET_TABLE_HANDLER(dso);
1099         SET_TABLE_HANDLER(symbol);
1100         SET_TABLE_HANDLER(branch_type);
1101         SET_TABLE_HANDLER(sample);
1102         SET_TABLE_HANDLER(call_path);
1103         SET_TABLE_HANDLER(call_return);
1104 }
1105
1106 /*
1107  * Start trace script
1108  */
1109 static int python_start_script(const char *script, int argc, const char **argv)
1110 {
1111         struct tables *tables = &tables_global;
1112         const char **command_line;
1113         char buf[PATH_MAX];
1114         int i, err = 0;
1115         FILE *fp;
1116
1117         command_line = malloc((argc + 1) * sizeof(const char *));
1118         command_line[0] = script;
1119         for (i = 1; i < argc + 1; i++)
1120                 command_line[i] = argv[i - 1];
1121
1122         Py_Initialize();
1123
1124         initperf_trace_context();
1125
1126         PySys_SetArgv(argc + 1, (char **)command_line);
1127
1128         fp = fopen(script, "r");
1129         if (!fp) {
1130                 sprintf(buf, "Can't open python script \"%s\"", script);
1131                 perror(buf);
1132                 err = -1;
1133                 goto error;
1134         }
1135
1136         err = PyRun_SimpleFile(fp, script);
1137         if (err) {
1138                 fprintf(stderr, "Error running python script %s\n", script);
1139                 goto error;
1140         }
1141
1142         err = run_start_sub();
1143         if (err) {
1144                 fprintf(stderr, "Error starting python script %s\n", script);
1145                 goto error;
1146         }
1147
1148         set_table_handlers(tables);
1149
1150         if (tables->db_export_mode) {
1151                 err = db_export__branch_types(&tables->dbe);
1152                 if (err)
1153                         goto error;
1154         }
1155
1156         free(command_line);
1157
1158         return err;
1159 error:
1160         Py_Finalize();
1161         free(command_line);
1162
1163         return err;
1164 }
1165
1166 static int python_flush_script(void)
1167 {
1168         struct tables *tables = &tables_global;
1169
1170         return db_export__flush(&tables->dbe);
1171 }
1172
1173 /*
1174  * Stop trace script
1175  */
1176 static int python_stop_script(void)
1177 {
1178         struct tables *tables = &tables_global;
1179
1180         try_call_object("trace_end", NULL);
1181
1182         db_export__exit(&tables->dbe);
1183
1184         Py_XDECREF(main_dict);
1185         Py_XDECREF(main_module);
1186         Py_Finalize();
1187
1188         return 0;
1189 }
1190
1191 static int python_generate_script(struct pevent *pevent, const char *outfile)
1192 {
1193         struct event_format *event = NULL;
1194         struct format_field *f;
1195         char fname[PATH_MAX];
1196         int not_first, count;
1197         FILE *ofp;
1198
1199         sprintf(fname, "%s.py", outfile);
1200         ofp = fopen(fname, "w");
1201         if (ofp == NULL) {
1202                 fprintf(stderr, "couldn't open %s\n", fname);
1203                 return -1;
1204         }
1205         fprintf(ofp, "# perf script event handlers, "
1206                 "generated by perf script -g python\n");
1207
1208         fprintf(ofp, "# Licensed under the terms of the GNU GPL"
1209                 " License version 2\n\n");
1210
1211         fprintf(ofp, "# The common_* event handler fields are the most useful "
1212                 "fields common to\n");
1213
1214         fprintf(ofp, "# all events.  They don't necessarily correspond to "
1215                 "the 'common_*' fields\n");
1216
1217         fprintf(ofp, "# in the format files.  Those fields not available as "
1218                 "handler params can\n");
1219
1220         fprintf(ofp, "# be retrieved using Python functions of the form "
1221                 "common_*(context).\n");
1222
1223         fprintf(ofp, "# See the perf-script-python Documentation for the list "
1224                 "of available functions.\n\n");
1225
1226         fprintf(ofp, "import os\n");
1227         fprintf(ofp, "import sys\n\n");
1228
1229         fprintf(ofp, "sys.path.append(os.environ['PERF_EXEC_PATH'] + \\\n");
1230         fprintf(ofp, "\t'/scripts/python/Perf-Trace-Util/lib/Perf/Trace')\n");
1231         fprintf(ofp, "\nfrom perf_trace_context import *\n");
1232         fprintf(ofp, "from Core import *\n\n\n");
1233
1234         fprintf(ofp, "def trace_begin():\n");
1235         fprintf(ofp, "\tprint \"in trace_begin\"\n\n");
1236
1237         fprintf(ofp, "def trace_end():\n");
1238         fprintf(ofp, "\tprint \"in trace_end\"\n\n");
1239
1240         while ((event = trace_find_next_event(pevent, event))) {
1241                 fprintf(ofp, "def %s__%s(", event->system, event->name);
1242                 fprintf(ofp, "event_name, ");
1243                 fprintf(ofp, "context, ");
1244                 fprintf(ofp, "common_cpu,\n");
1245                 fprintf(ofp, "\tcommon_secs, ");
1246                 fprintf(ofp, "common_nsecs, ");
1247                 fprintf(ofp, "common_pid, ");
1248                 fprintf(ofp, "common_comm,\n\t");
1249                 fprintf(ofp, "common_callchain, ");
1250
1251                 not_first = 0;
1252                 count = 0;
1253
1254                 for (f = event->format.fields; f; f = f->next) {
1255                         if (not_first++)
1256                                 fprintf(ofp, ", ");
1257                         if (++count % 5 == 0)
1258                                 fprintf(ofp, "\n\t");
1259
1260                         fprintf(ofp, "%s", f->name);
1261                 }
1262                 fprintf(ofp, "):\n");
1263
1264                 fprintf(ofp, "\t\tprint_header(event_name, common_cpu, "
1265                         "common_secs, common_nsecs,\n\t\t\t"
1266                         "common_pid, common_comm)\n\n");
1267
1268                 fprintf(ofp, "\t\tprint \"");
1269
1270                 not_first = 0;
1271                 count = 0;
1272
1273                 for (f = event->format.fields; f; f = f->next) {
1274                         if (not_first++)
1275                                 fprintf(ofp, ", ");
1276                         if (count && count % 3 == 0) {
1277                                 fprintf(ofp, "\" \\\n\t\t\"");
1278                         }
1279                         count++;
1280
1281                         fprintf(ofp, "%s=", f->name);
1282                         if (f->flags & FIELD_IS_STRING ||
1283                             f->flags & FIELD_IS_FLAG ||
1284                             f->flags & FIELD_IS_ARRAY ||
1285                             f->flags & FIELD_IS_SYMBOLIC)
1286                                 fprintf(ofp, "%%s");
1287                         else if (f->flags & FIELD_IS_SIGNED)
1288                                 fprintf(ofp, "%%d");
1289                         else
1290                                 fprintf(ofp, "%%u");
1291                 }
1292
1293                 fprintf(ofp, "\" %% \\\n\t\t(");
1294
1295                 not_first = 0;
1296                 count = 0;
1297
1298                 for (f = event->format.fields; f; f = f->next) {
1299                         if (not_first++)
1300                                 fprintf(ofp, ", ");
1301
1302                         if (++count % 5 == 0)
1303                                 fprintf(ofp, "\n\t\t");
1304
1305                         if (f->flags & FIELD_IS_FLAG) {
1306                                 if ((count - 1) % 5 != 0) {
1307                                         fprintf(ofp, "\n\t\t");
1308                                         count = 4;
1309                                 }
1310                                 fprintf(ofp, "flag_str(\"");
1311                                 fprintf(ofp, "%s__%s\", ", event->system,
1312                                         event->name);
1313                                 fprintf(ofp, "\"%s\", %s)", f->name,
1314                                         f->name);
1315                         } else if (f->flags & FIELD_IS_SYMBOLIC) {
1316                                 if ((count - 1) % 5 != 0) {
1317                                         fprintf(ofp, "\n\t\t");
1318                                         count = 4;
1319                                 }
1320                                 fprintf(ofp, "symbol_str(\"");
1321                                 fprintf(ofp, "%s__%s\", ", event->system,
1322                                         event->name);
1323                                 fprintf(ofp, "\"%s\", %s)", f->name,
1324                                         f->name);
1325                         } else
1326                                 fprintf(ofp, "%s", f->name);
1327                 }
1328
1329                 fprintf(ofp, ")\n\n");
1330
1331                 fprintf(ofp, "\t\tfor node in common_callchain:");
1332                 fprintf(ofp, "\n\t\t\tif 'sym' in node:");
1333                 fprintf(ofp, "\n\t\t\t\tprint \"\\t[%%x] %%s\" %% (node['ip'], node['sym']['name'])");
1334                 fprintf(ofp, "\n\t\t\telse:");
1335                 fprintf(ofp, "\n\t\t\t\tprint \"\t[%%x]\" %% (node['ip'])\n\n");
1336                 fprintf(ofp, "\t\tprint \"\\n\"\n\n");
1337
1338         }
1339
1340         fprintf(ofp, "def trace_unhandled(event_name, context, "
1341                 "event_fields_dict):\n");
1342
1343         fprintf(ofp, "\t\tprint ' '.join(['%%s=%%s'%%(k,str(v))"
1344                 "for k,v in sorted(event_fields_dict.items())])\n\n");
1345
1346         fprintf(ofp, "def print_header("
1347                 "event_name, cpu, secs, nsecs, pid, comm):\n"
1348                 "\tprint \"%%-20s %%5u %%05u.%%09u %%8u %%-20s \" %% \\\n\t"
1349                 "(event_name, cpu, secs, nsecs, pid, comm),\n");
1350
1351         fclose(ofp);
1352
1353         fprintf(stderr, "generated Python script: %s\n", fname);
1354
1355         return 0;
1356 }
1357
1358 struct scripting_ops python_scripting_ops = {
1359         .name                   = "Python",
1360         .start_script           = python_start_script,
1361         .flush_script           = python_flush_script,
1362         .stop_script            = python_stop_script,
1363         .process_event          = python_process_event,
1364         .process_stat           = python_process_stat,
1365         .process_stat_interval  = python_process_stat_interval,
1366         .generate_script        = python_generate_script,
1367 };