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

   1 /*
   2  * trace-event-python.  Feed trace events to an embedded Python interpreter.
   3  *
   4  * Copyright (C) 2010 Tom Zanussi <tzanussi@gmail.com>
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  */
  21
  22 #include <Python.h>
  23
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <errno.h>
  28
  29 #include "../../perf.h"
  30 #include "../evsel.h"
  31 #include "../util.h"
  32 #include "../event.h"
  33 #include "../thread.h"
  34 #include "../trace-event.h"
  35
  36 PyMODINIT_FUNC initperf_trace_context(void);
  37
  38 #define FTRACE_MAX_EVENT                                \
  39         ((1 << (sizeof(unsigned short) * 8)) - 1)
  40
  41 struct event_format *events[FTRACE_MAX_EVENT];
  42
  43 #define MAX_FIELDS      64
  44 #define N_COMMON_FIELDS 7
  45
  46 extern struct scripting_context *scripting_context;
  47
  48 static char *cur_field_name;
  49 static int zero_flag_atom;
  50
  51 static PyObject *main_module, *main_dict;
  52
  53 static void handler_call_die(const char *handler_name)
  54 {
  55         PyErr_Print();
  56         Py_FatalError("problem in Python trace event handler");
  57 }
  58
  59 /*
  60  * Insert val into into the dictionary and decrement the reference counter.
  61  * This is necessary for dictionaries since PyDict_SetItemString() does not
  62  * steal a reference, as opposed to PyTuple_SetItem().
  63  */
  64 static void pydict_set_item_string_decref(PyObject *dict, const char *key, PyObject *val)
  65 {
  66         PyDict_SetItemString(dict, key, val);
  67         Py_DECREF(val);
  68 }
  69
  70 static void define_value(enum print_arg_type field_type,
  71                          const char *ev_name,
  72                          const char *field_name,
  73                          const char *field_value,
  74                          const char *field_str)
  75 {
  76         const char *handler_name = "define_flag_value";
  77         PyObject *handler, *t, *retval;
  78         unsigned long long value;
  79         unsigned n = 0;
  80
  81         if (field_type == PRINT_SYMBOL)
  82                 handler_name = "define_symbolic_value";
  83
  84         t = PyTuple_New(4);
  85         if (!t)
  86                 Py_FatalError("couldn't create Python tuple");
  87
  88         value = eval_flag(field_value);
  89
  90         PyTuple_SetItem(t, n++, PyString_FromString(ev_name));
  91         PyTuple_SetItem(t, n++, PyString_FromString(field_name));
  92         PyTuple_SetItem(t, n++, PyInt_FromLong(value));
  93         PyTuple_SetItem(t, n++, PyString_FromString(field_str));
  94
  95         handler = PyDict_GetItemString(main_dict, handler_name);
  96         if (handler && PyCallable_Check(handler)) {
  97                 retval = PyObject_CallObject(handler, t);
  98                 if (retval == NULL)
  99                         handler_call_die(handler_name);
 100         }
 101
 102         Py_DECREF(t);
 103 }
 104
 105 static void define_values(enum print_arg_type field_type,
 106                           struct print_flag_sym *field,
 107                           const char *ev_name,
 108                           const char *field_name)
 109 {
 110         define_value(field_type, ev_name, field_name, field->value,
 111                      field->str);
 112
 113         if (field->next)
 114                 define_values(field_type, field->next, ev_name, field_name);
 115 }
 116
 117 static void define_field(enum print_arg_type field_type,
 118                          const char *ev_name,
 119                          const char *field_name,
 120                          const char *delim)
 121 {
 122         const char *handler_name = "define_flag_field";
 123         PyObject *handler, *t, *retval;
 124         unsigned n = 0;
 125
 126         if (field_type == PRINT_SYMBOL)
 127                 handler_name = "define_symbolic_field";
 128
 129         if (field_type == PRINT_FLAGS)
 130                 t = PyTuple_New(3);
 131         else
 132                 t = PyTuple_New(2);
 133         if (!t)
 134                 Py_FatalError("couldn't create Python tuple");
 135
 136         PyTuple_SetItem(t, n++, PyString_FromString(ev_name));
 137         PyTuple_SetItem(t, n++, PyString_FromString(field_name));
 138         if (field_type == PRINT_FLAGS)
 139                 PyTuple_SetItem(t, n++, PyString_FromString(delim));
 140
 141         handler = PyDict_GetItemString(main_dict, handler_name);
 142         if (handler && PyCallable_Check(handler)) {
 143                 retval = PyObject_CallObject(handler, t);
 144                 if (retval == NULL)
 145                         handler_call_die(handler_name);
 146         }
 147
 148         Py_DECREF(t);
 149 }
 150
 151 static void define_event_symbols(struct event_format *event,
 152                                  const char *ev_name,
 153                                  struct print_arg *args)
 154 {
 155         switch (args->type) {
 156         case PRINT_NULL:
 157                 break;
 158         case PRINT_ATOM:
 159                 define_value(PRINT_FLAGS, ev_name, cur_field_name, "0",
 160                              args->atom.atom);
 161                 zero_flag_atom = 0;
 162                 break;
 163         case PRINT_FIELD:
 164                 free(cur_field_name);
 165                 cur_field_name = strdup(args->field.name);
 166                 break;
 167         case PRINT_FLAGS:
 168                 define_event_symbols(event, ev_name, args->flags.field);
 169                 define_field(PRINT_FLAGS, ev_name, cur_field_name,
 170                              args->flags.delim);
 171                 define_values(PRINT_FLAGS, args->flags.flags, ev_name,
 172                               cur_field_name);
 173                 break;
 174         case PRINT_SYMBOL:
 175                 define_event_symbols(event, ev_name, args->symbol.field);
 176                 define_field(PRINT_SYMBOL, ev_name, cur_field_name, NULL);
 177                 define_values(PRINT_SYMBOL, args->symbol.symbols, ev_name,
 178                               cur_field_name);
 179                 break;
 180         case PRINT_HEX:
 181                 define_event_symbols(event, ev_name, args->hex.field);
 182                 define_event_symbols(event, ev_name, args->hex.size);
 183                 break;
 184         case PRINT_STRING:
 185                 break;
 186         case PRINT_TYPE:
 187                 define_event_symbols(event, ev_name, args->typecast.item);
 188                 break;
 189         case PRINT_OP:
 190                 if (strcmp(args->op.op, ":") == 0)
 191                         zero_flag_atom = 1;
 192                 define_event_symbols(event, ev_name, args->op.left);
 193                 define_event_symbols(event, ev_name, args->op.right);
 194                 break;
 195         default:
 196                 /* gcc warns for these? */
 197         case PRINT_BSTRING:
 198         case PRINT_DYNAMIC_ARRAY:
 199         case PRINT_FUNC:
 200         case PRINT_BITMASK:
 201                 /* we should warn... */
 202                 return;
 203         }
 204
 205         if (args->next)
 206                 define_event_symbols(event, ev_name, args->next);
 207 }
 208
 209 static inline struct event_format *find_cache_event(struct perf_evsel *evsel)
 210 {
 211         static char ev_name[256];
 212         struct event_format *event;
 213         int type = evsel->attr.config;
 214
 215         /*
 216          * XXX: Do we really need to cache this since now we have evsel->tp_format
 217          * cached already? Need to re-read this "cache" routine that as well calls
 218          * define_event_symbols() :-\
 219          */
 220         if (events[type])
 221                 return events[type];
 222
 223         events[type] = event = evsel->tp_format;
 224         if (!event)
 225                 return NULL;
 226
 227         sprintf(ev_name, "%s__%s", event->system, event->name);
 228
 229         define_event_symbols(event, ev_name, event->print_fmt.args);
 230
 231         return event;
 232 }
 233
 234 static PyObject *get_field_numeric_entry(struct event_format *event,
 235                 struct format_field *field, void *data)
 236 {
 237         PyObject *obj;
 238         unsigned long long val;
 239
 240         val = read_size(event, data + field->offset, field->size);
 241         if (field->flags & FIELD_IS_SIGNED) {
 242                 if ((long long)val >= LONG_MIN &&
 243                                 (long long)val <= LONG_MAX)
 244                         obj = PyInt_FromLong(val);
 245                 else
 246                         obj = PyLong_FromLongLong(val);
 247         } else {
 248                 if (val <= LONG_MAX)
 249                         obj = PyInt_FromLong(val);
 250                 else
 251                         obj = PyLong_FromUnsignedLongLong(val);
 252         }
 253         return obj;
 254 }
 255
 256 static void python_process_tracepoint(struct perf_sample *sample,
 257                                       struct perf_evsel *evsel,
 258                                       struct thread *thread,
 259                                       struct addr_location *al)
 260 {
 261         PyObject *handler, *retval, *context, *t, *obj, *dict = NULL;
 262         static char handler_name[256];
 263         struct format_field *field;
 264         unsigned long s, ns;
 265         struct event_format *event;
 266         unsigned n = 0;
 267         int pid;
 268         int cpu = sample->cpu;
 269         void *data = sample->raw_data;
 270         unsigned long long nsecs = sample->time;
 271         const char *comm = thread__comm_str(thread);
 272
 273         t = PyTuple_New(MAX_FIELDS);
 274         if (!t)
 275                 Py_FatalError("couldn't create Python tuple");
 276
 277         event = find_cache_event(evsel);
 278         if (!event)
 279                 die("ug! no event found for type %d", (int)evsel->attr.config);
 280
 281         pid = raw_field_value(event, "common_pid", data);
 282
 283         sprintf(handler_name, "%s__%s", event->system, event->name);
 284
 285         handler = PyDict_GetItemString(main_dict, handler_name);
 286         if (handler && !PyCallable_Check(handler))
 287                 handler = NULL;
 288         if (!handler) {
 289                 dict = PyDict_New();
 290                 if (!dict)
 291                         Py_FatalError("couldn't create Python dict");
 292         }
 293         s = nsecs / NSECS_PER_SEC;
 294         ns = nsecs - s * NSECS_PER_SEC;
 295
 296         scripting_context->event_data = data;
 297         scripting_context->pevent = evsel->tp_format->pevent;
 298
 299         context = PyCObject_FromVoidPtr(scripting_context, NULL);
 300
 301         PyTuple_SetItem(t, n++, PyString_FromString(handler_name));
 302         PyTuple_SetItem(t, n++, context);
 303
 304         if (handler) {
 305                 PyTuple_SetItem(t, n++, PyInt_FromLong(cpu));
 306                 PyTuple_SetItem(t, n++, PyInt_FromLong(s));
 307                 PyTuple_SetItem(t, n++, PyInt_FromLong(ns));
 308                 PyTuple_SetItem(t, n++, PyInt_FromLong(pid));
 309                 PyTuple_SetItem(t, n++, PyString_FromString(comm));
 310         } else {
 311                 pydict_set_item_string_decref(dict, "common_cpu", PyInt_FromLong(cpu));
 312                 pydict_set_item_string_decref(dict, "common_s", PyInt_FromLong(s));
 313                 pydict_set_item_string_decref(dict, "common_ns", PyInt_FromLong(ns));
 314                 pydict_set_item_string_decref(dict, "common_pid", PyInt_FromLong(pid));
 315                 pydict_set_item_string_decref(dict, "common_comm", PyString_FromString(comm));
 316         }
 317         for (field = event->format.fields; field; field = field->next) {
 318                 if (field->flags & FIELD_IS_STRING) {
 319                         int offset;
 320                         if (field->flags & FIELD_IS_DYNAMIC) {
 321                                 offset = *(int *)(data + field->offset);
 322                                 offset &= 0xffff;
 323                         } else
 324                                 offset = field->offset;
 325                         obj = PyString_FromString((char *)data + offset);
 326                 } else { /* FIELD_IS_NUMERIC */
 327                         obj = get_field_numeric_entry(event, field, data);
 328                 }
 329                 if (handler)
 330                         PyTuple_SetItem(t, n++, obj);
 331                 else
 332                         pydict_set_item_string_decref(dict, field->name, obj);
 333
 334         }
 335         if (!handler)
 336                 PyTuple_SetItem(t, n++, dict);
 337
 338         if (_PyTuple_Resize(&t, n) == -1)
 339                 Py_FatalError("error resizing Python tuple");
 340
 341         if (handler) {
 342                 retval = PyObject_CallObject(handler, t);
 343                 if (retval == NULL)
 344                         handler_call_die(handler_name);
 345         } else {
 346                 handler = PyDict_GetItemString(main_dict, "trace_unhandled");
 347                 if (handler && PyCallable_Check(handler)) {
 348
 349                         retval = PyObject_CallObject(handler, t);
 350                         if (retval == NULL)
 351                                 handler_call_die("trace_unhandled");
 352                 }
 353                 Py_DECREF(dict);
 354         }
 355
 356         Py_DECREF(t);
 357 }
 358
 359 static void python_process_general_event(struct perf_sample *sample,
 360                                          struct perf_evsel *evsel,
 361                                          struct thread *thread,
 362                                          struct addr_location *al)
 363 {
 364         PyObject *handler, *retval, *t, *dict;
 365         static char handler_name[64];
 366         unsigned n = 0;
 367
 368         /*
 369          * Use the MAX_FIELDS to make the function expandable, though
 370          * currently there is only one item for the tuple.
 371          */
 372         t = PyTuple_New(MAX_FIELDS);
 373         if (!t)
 374                 Py_FatalError("couldn't create Python tuple");
 375
 376         dict = PyDict_New();
 377         if (!dict)
 378                 Py_FatalError("couldn't create Python dictionary");
 379
 380         snprintf(handler_name, sizeof(handler_name), "%s", "process_event");
 381
 382         handler = PyDict_GetItemString(main_dict, handler_name);
 383         if (!handler || !PyCallable_Check(handler))
 384                 goto exit;
 385
 386         pydict_set_item_string_decref(dict, "ev_name", PyString_FromString(perf_evsel__name(evsel)));
 387         pydict_set_item_string_decref(dict, "attr", PyString_FromStringAndSize(
 388                         (const char *)&evsel->attr, sizeof(evsel->attr)));
 389         pydict_set_item_string_decref(dict, "sample", PyString_FromStringAndSize(
 390                         (const char *)sample, sizeof(*sample)));
 391         pydict_set_item_string_decref(dict, "raw_buf", PyString_FromStringAndSize(
 392                         (const char *)sample->raw_data, sample->raw_size));
 393         pydict_set_item_string_decref(dict, "comm",
 394                         PyString_FromString(thread__comm_str(thread)));
 395         if (al->map) {
 396                 pydict_set_item_string_decref(dict, "dso",
 397                         PyString_FromString(al->map->dso->name));
 398         }
 399         if (al->sym) {
 400                 pydict_set_item_string_decref(dict, "symbol",
 401                         PyString_FromString(al->sym->name));
 402         }
 403
 404         PyTuple_SetItem(t, n++, dict);
 405         if (_PyTuple_Resize(&t, n) == -1)
 406                 Py_FatalError("error resizing Python tuple");
 407
 408         retval = PyObject_CallObject(handler, t);
 409         if (retval == NULL)
 410                 handler_call_die(handler_name);
 411 exit:
 412         Py_DECREF(dict);
 413         Py_DECREF(t);
 414 }
 415
 416 static void python_process_event(union perf_event *event __maybe_unused,
 417                                  struct perf_sample *sample,
 418                                  struct perf_evsel *evsel,
 419                                  struct thread *thread,
 420                                  struct addr_location *al)
 421 {
 422         switch (evsel->attr.type) {
 423         case PERF_TYPE_TRACEPOINT:
 424                 python_process_tracepoint(sample, evsel, thread, al);
 425                 break;
 426         /* Reserve for future process_hw/sw/raw APIs */
 427         default:
 428                 python_process_general_event(sample, evsel, thread, al);
 429         }
 430 }
 431
 432 static int run_start_sub(void)
 433 {
 434         PyObject *handler, *retval;
 435         int err = 0;
 436
 437         main_module = PyImport_AddModule("__main__");
 438         if (main_module == NULL)
 439                 return -1;
 440         Py_INCREF(main_module);
 441
 442         main_dict = PyModule_GetDict(main_module);
 443         if (main_dict == NULL) {
 444                 err = -1;
 445                 goto error;
 446         }
 447         Py_INCREF(main_dict);
 448
 449         handler = PyDict_GetItemString(main_dict, "trace_begin");
 450         if (handler == NULL || !PyCallable_Check(handler))
 451                 goto out;
 452
 453         retval = PyObject_CallObject(handler, NULL);
 454         if (retval == NULL)
 455                 handler_call_die("trace_begin");
 456
 457         Py_DECREF(retval);
 458         return err;
 459 error:
 460         Py_XDECREF(main_dict);
 461         Py_XDECREF(main_module);
 462 out:
 463         return err;
 464 }
 465
 466 /*
 467  * Start trace script
 468  */
 469 static int python_start_script(const char *script, int argc, const char **argv)
 470 {
 471         const char **command_line;
 472         char buf[PATH_MAX];
 473         int i, err = 0;
 474         FILE *fp;
 475
 476         command_line = malloc((argc + 1) * sizeof(const char *));
 477         command_line[0] = script;
 478         for (i = 1; i < argc + 1; i++)
 479                 command_line[i] = argv[i - 1];
 480
 481         Py_Initialize();
 482
 483         initperf_trace_context();
 484
 485         PySys_SetArgv(argc + 1, (char **)command_line);
 486
 487         fp = fopen(script, "r");
 488         if (!fp) {
 489                 sprintf(buf, "Can't open python script \"%s\"", script);
 490                 perror(buf);
 491                 err = -1;
 492                 goto error;
 493         }
 494
 495         err = PyRun_SimpleFile(fp, script);
 496         if (err) {
 497                 fprintf(stderr, "Error running python script %s\n", script);
 498                 goto error;
 499         }
 500
 501         err = run_start_sub();
 502         if (err) {
 503                 fprintf(stderr, "Error starting python script %s\n", script);
 504                 goto error;
 505         }
 506
 507         free(command_line);
 508
 509         return err;
 510 error:
 511         Py_Finalize();
 512         free(command_line);
 513
 514         return err;
 515 }
 516
 517 /*
 518  * Stop trace script
 519  */
 520 static int python_stop_script(void)
 521 {
 522         PyObject *handler, *retval;
 523         int err = 0;
 524
 525         handler = PyDict_GetItemString(main_dict, "trace_end");
 526         if (handler == NULL || !PyCallable_Check(handler))
 527                 goto out;
 528
 529         retval = PyObject_CallObject(handler, NULL);
 530         if (retval == NULL)
 531                 handler_call_die("trace_end");
 532         else
 533                 Py_DECREF(retval);
 534 out:
 535         Py_XDECREF(main_dict);
 536         Py_XDECREF(main_module);
 537         Py_Finalize();
 538
 539         return err;
 540 }
 541
 542 static int python_generate_script(struct pevent *pevent, const char *outfile)
 543 {
 544         struct event_format *event = NULL;
 545         struct format_field *f;
 546         char fname[PATH_MAX];
 547         int not_first, count;
 548         FILE *ofp;
 549
 550         sprintf(fname, "%s.py", outfile);
 551         ofp = fopen(fname, "w");
 552         if (ofp == NULL) {
 553                 fprintf(stderr, "couldn't open %s\n", fname);
 554                 return -1;
 555         }
 556         fprintf(ofp, "# perf script event handlers, "
 557                 "generated by perf script -g python\n");
 558
 559         fprintf(ofp, "# Licensed under the terms of the GNU GPL"
 560                 " License version 2\n\n");
 561
 562         fprintf(ofp, "# The common_* event handler fields are the most useful "
 563                 "fields common to\n");
 564
 565         fprintf(ofp, "# all events.  They don't necessarily correspond to "
 566                 "the 'common_*' fields\n");
 567
 568         fprintf(ofp, "# in the format files.  Those fields not available as "
 569                 "handler params can\n");
 570
 571         fprintf(ofp, "# be retrieved using Python functions of the form "
 572                 "common_*(context).\n");
 573
 574         fprintf(ofp, "# See the perf-trace-python Documentation for the list "
 575                 "of available functions.\n\n");
 576
 577         fprintf(ofp, "import os\n");
 578         fprintf(ofp, "import sys\n\n");
 579
 580         fprintf(ofp, "sys.path.append(os.environ['PERF_EXEC_PATH'] + \\\n");
 581         fprintf(ofp, "\t'/scripts/python/Perf-Trace-Util/lib/Perf/Trace')\n");
 582         fprintf(ofp, "\nfrom perf_trace_context import *\n");
 583         fprintf(ofp, "from Core import *\n\n\n");
 584
 585         fprintf(ofp, "def trace_begin():\n");
 586         fprintf(ofp, "\tprint \"in trace_begin\"\n\n");
 587
 588         fprintf(ofp, "def trace_end():\n");
 589         fprintf(ofp, "\tprint \"in trace_end\"\n\n");
 590
 591         while ((event = trace_find_next_event(pevent, event))) {
 592                 fprintf(ofp, "def %s__%s(", event->system, event->name);
 593                 fprintf(ofp, "event_name, ");
 594                 fprintf(ofp, "context, ");
 595                 fprintf(ofp, "common_cpu,\n");
 596                 fprintf(ofp, "\tcommon_secs, ");
 597                 fprintf(ofp, "common_nsecs, ");
 598                 fprintf(ofp, "common_pid, ");
 599                 fprintf(ofp, "common_comm,\n\t");
 600
 601                 not_first = 0;
 602                 count = 0;
 603
 604                 for (f = event->format.fields; f; f = f->next) {
 605                         if (not_first++)
 606                                 fprintf(ofp, ", ");
 607                         if (++count % 5 == 0)
 608                                 fprintf(ofp, "\n\t");
 609
 610                         fprintf(ofp, "%s", f->name);
 611                 }
 612                 fprintf(ofp, "):\n");
 613
 614                 fprintf(ofp, "\t\tprint_header(event_name, common_cpu, "
 615                         "common_secs, common_nsecs,\n\t\t\t"
 616                         "common_pid, common_comm)\n\n");
 617
 618                 fprintf(ofp, "\t\tprint \"");
 619
 620                 not_first = 0;
 621                 count = 0;
 622
 623                 for (f = event->format.fields; f; f = f->next) {
 624                         if (not_first++)
 625                                 fprintf(ofp, ", ");
 626                         if (count && count % 3 == 0) {
 627                                 fprintf(ofp, "\" \\\n\t\t\"");
 628                         }
 629                         count++;
 630
 631                         fprintf(ofp, "%s=", f->name);
 632                         if (f->flags & FIELD_IS_STRING ||
 633                             f->flags & FIELD_IS_FLAG ||
 634                             f->flags & FIELD_IS_ARRAY ||
 635                             f->flags & FIELD_IS_SYMBOLIC)
 636                                 fprintf(ofp, "%%s");
 637                         else if (f->flags & FIELD_IS_SIGNED)
 638                                 fprintf(ofp, "%%d");
 639                         else
 640                                 fprintf(ofp, "%%u");
 641                 }
 642
 643                 fprintf(ofp, "\\n\" %% \\\n\t\t(");
 644
 645                 not_first = 0;
 646                 count = 0;
 647
 648                 for (f = event->format.fields; f; f = f->next) {
 649                         if (not_first++)
 650                                 fprintf(ofp, ", ");
 651
 652                         if (++count % 5 == 0)
 653                                 fprintf(ofp, "\n\t\t");
 654
 655                         if (f->flags & FIELD_IS_FLAG) {
 656                                 if ((count - 1) % 5 != 0) {
 657                                         fprintf(ofp, "\n\t\t");
 658                                         count = 4;
 659                                 }
 660                                 fprintf(ofp, "flag_str(\"");
 661                                 fprintf(ofp, "%s__%s\", ", event->system,
 662                                         event->name);
 663                                 fprintf(ofp, "\"%s\", %s)", f->name,
 664                                         f->name);
 665                         } else if (f->flags & FIELD_IS_SYMBOLIC) {
 666                                 if ((count - 1) % 5 != 0) {
 667                                         fprintf(ofp, "\n\t\t");
 668                                         count = 4;
 669                                 }
 670                                 fprintf(ofp, "symbol_str(\"");
 671                                 fprintf(ofp, "%s__%s\", ", event->system,
 672                                         event->name);
 673                                 fprintf(ofp, "\"%s\", %s)", f->name,
 674                                         f->name);
 675                         } else
 676                                 fprintf(ofp, "%s", f->name);
 677                 }
 678
 679                 fprintf(ofp, "),\n\n");
 680         }
 681
 682         fprintf(ofp, "def trace_unhandled(event_name, context, "
 683                 "event_fields_dict):\n");
 684
 685         fprintf(ofp, "\t\tprint ' '.join(['%%s=%%s'%%(k,str(v))"
 686                 "for k,v in sorted(event_fields_dict.items())])\n\n");
 687
 688         fprintf(ofp, "def print_header("
 689                 "event_name, cpu, secs, nsecs, pid, comm):\n"
 690                 "\tprint \"%%-20s %%5u %%05u.%%09u %%8u %%-20s \" %% \\\n\t"
 691                 "(event_name, cpu, secs, nsecs, pid, comm),\n");
 692
 693         fclose(ofp);
 694
 695         fprintf(stderr, "generated Python script: %s\n", fname);
 696
 697         return 0;
 698 }
 699
 700 struct scripting_ops python_scripting_ops = {
 701         .name = "Python",
 702         .start_script = python_start_script,
 703         .stop_script = python_stop_script,
 704         .process_event = python_process_event,
 705         .generate_script = python_generate_script,
 706 };