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 int get_argument_count(PyObject *handler)
 120 {
 121         int arg_count = 0;
 122
 123         /*
 124          * The attribute for the code object is func_code in Python 2,
 125          * whereas it is __code__ in Python 3.0+.
 126          */
 127         PyObject *code_obj = PyObject_GetAttrString(handler,
 128                 "func_code");
 129         if (PyErr_Occurred()) {
 130                 PyErr_Clear();
 131                 code_obj = PyObject_GetAttrString(handler,
 132                         "__code__");
 133         }
 134         PyErr_Clear();
 135         if (code_obj) {
 136                 PyObject *arg_count_obj = PyObject_GetAttrString(code_obj,
 137                         "co_argcount");
 138                 if (arg_count_obj) {
 139                         arg_count = (int) PyInt_AsLong(arg_count_obj);
 140                         Py_DECREF(arg_count_obj);
 141                 }
 142                 Py_DECREF(code_obj);
 143         }
 144         return arg_count;
 145 }
 146
 147 static void call_object(PyObject *handler, PyObject *args, const char *die_msg)
 148 {
 149         PyObject *retval;
 150
 151         retval = PyObject_CallObject(handler, args);
 152         if (retval == NULL)
 153                 handler_call_die(die_msg);
 154         Py_DECREF(retval);
 155 }
 156
 157 static void try_call_object(const char *handler_name, PyObject *args)
 158 {
 159         PyObject *handler;
 160
 161         handler = get_handler(handler_name);
 162         if (handler)
 163                 call_object(handler, args, handler_name);
 164 }
 165
 166 static void define_value(enum print_arg_type field_type,
 167                          const char *ev_name,
 168                          const char *field_name,
 169                          const char *field_value,
 170                          const char *field_str)
 171 {
 172         const char *handler_name = "define_flag_value";
 173         PyObject *t;
 174         unsigned long long value;
 175         unsigned n = 0;
 176
 177         if (field_type == PRINT_SYMBOL)
 178                 handler_name = "define_symbolic_value";
 179
 180         t = PyTuple_New(4);
 181         if (!t)
 182                 Py_FatalError("couldn't create Python tuple");
 183
 184         value = eval_flag(field_value);
 185
 186         PyTuple_SetItem(t, n++, PyString_FromString(ev_name));
 187         PyTuple_SetItem(t, n++, PyString_FromString(field_name));
 188         PyTuple_SetItem(t, n++, PyInt_FromLong(value));
 189         PyTuple_SetItem(t, n++, PyString_FromString(field_str));
 190
 191         try_call_object(handler_name, t);
 192
 193         Py_DECREF(t);
 194 }
 195
 196 static void define_values(enum print_arg_type field_type,
 197                           struct print_flag_sym *field,
 198                           const char *ev_name,
 199                           const char *field_name)
 200 {
 201         define_value(field_type, ev_name, field_name, field->value,
 202                      field->str);
 203
 204         if (field->next)
 205                 define_values(field_type, field->next, ev_name, field_name);
 206 }
 207
 208 static void define_field(enum print_arg_type field_type,
 209                          const char *ev_name,
 210                          const char *field_name,
 211                          const char *delim)
 212 {
 213         const char *handler_name = "define_flag_field";
 214         PyObject *t;
 215         unsigned n = 0;
 216
 217         if (field_type == PRINT_SYMBOL)
 218                 handler_name = "define_symbolic_field";
 219
 220         if (field_type == PRINT_FLAGS)
 221                 t = PyTuple_New(3);
 222         else
 223                 t = PyTuple_New(2);
 224         if (!t)
 225                 Py_FatalError("couldn't create Python tuple");
 226
 227         PyTuple_SetItem(t, n++, PyString_FromString(ev_name));
 228         PyTuple_SetItem(t, n++, PyString_FromString(field_name));
 229         if (field_type == PRINT_FLAGS)
 230                 PyTuple_SetItem(t, n++, PyString_FromString(delim));
 231
 232         try_call_object(handler_name, t);
 233
 234         Py_DECREF(t);
 235 }
 236
 237 static void define_event_symbols(struct event_format *event,
 238                                  const char *ev_name,
 239                                  struct print_arg *args)
 240 {
 241         if (args == NULL)
 242                 return;
 243
 244         switch (args->type) {
 245         case PRINT_NULL:
 246                 break;
 247         case PRINT_ATOM:
 248                 define_value(PRINT_FLAGS, ev_name, cur_field_name, "0",
 249                              args->atom.atom);
 250                 zero_flag_atom = 0;
 251                 break;
 252         case PRINT_FIELD:
 253                 free(cur_field_name);
 254                 cur_field_name = strdup(args->field.name);
 255                 break;
 256         case PRINT_FLAGS:
 257                 define_event_symbols(event, ev_name, args->flags.field);
 258                 define_field(PRINT_FLAGS, ev_name, cur_field_name,
 259                              args->flags.delim);
 260                 define_values(PRINT_FLAGS, args->flags.flags, ev_name,
 261                               cur_field_name);
 262                 break;
 263         case PRINT_SYMBOL:
 264                 define_event_symbols(event, ev_name, args->symbol.field);
 265                 define_field(PRINT_SYMBOL, ev_name, cur_field_name, NULL);
 266                 define_values(PRINT_SYMBOL, args->symbol.symbols, ev_name,
 267                               cur_field_name);
 268                 break;
 269         case PRINT_HEX:
 270         case PRINT_HEX_STR:
 271                 define_event_symbols(event, ev_name, args->hex.field);
 272                 define_event_symbols(event, ev_name, args->hex.size);
 273                 break;
 274         case PRINT_INT_ARRAY:
 275                 define_event_symbols(event, ev_name, args->int_array.field);
 276                 define_event_symbols(event, ev_name, args->int_array.count);
 277                 define_event_symbols(event, ev_name, args->int_array.el_size);
 278                 break;
 279         case PRINT_STRING:
 280                 break;
 281         case PRINT_TYPE:
 282                 define_event_symbols(event, ev_name, args->typecast.item);
 283                 break;
 284         case PRINT_OP:
 285                 if (strcmp(args->op.op, ":") == 0)
 286                         zero_flag_atom = 1;
 287                 define_event_symbols(event, ev_name, args->op.left);
 288                 define_event_symbols(event, ev_name, args->op.right);
 289                 break;
 290         default:
 291                 /* gcc warns for these? */
 292         case PRINT_BSTRING:
 293         case PRINT_DYNAMIC_ARRAY:
 294         case PRINT_DYNAMIC_ARRAY_LEN:
 295         case PRINT_FUNC:
 296         case PRINT_BITMASK:
 297                 /* we should warn... */
 298                 return;
 299         }
 300
 301         if (args->next)
 302                 define_event_symbols(event, ev_name, args->next);
 303 }
 304
 305 static PyObject *get_field_numeric_entry(struct event_format *event,
 306                 struct format_field *field, void *data)
 307 {
 308         bool is_array = field->flags & FIELD_IS_ARRAY;
 309         PyObject *obj = NULL, *list = NULL;
 310         unsigned long long val;
 311         unsigned int item_size, n_items, i;
 312
 313         if (is_array) {
 314                 list = PyList_New(field->arraylen);
 315                 item_size = field->size / field->arraylen;
 316                 n_items = field->arraylen;
 317         } else {
 318                 item_size = field->size;
 319                 n_items = 1;
 320         }
 321
 322         for (i = 0; i < n_items; i++) {
 323
 324                 val = read_size(event, data + field->offset + i * item_size,
 325                                 item_size);
 326                 if (field->flags & FIELD_IS_SIGNED) {
 327                         if ((long long)val >= LONG_MIN &&
 328                                         (long long)val <= LONG_MAX)
 329                                 obj = PyInt_FromLong(val);
 330                         else
 331                                 obj = PyLong_FromLongLong(val);
 332                 } else {
 333                         if (val <= LONG_MAX)
 334                                 obj = PyInt_FromLong(val);
 335                         else
 336                                 obj = PyLong_FromUnsignedLongLong(val);
 337                 }
 338                 if (is_array)
 339                         PyList_SET_ITEM(list, i, obj);
 340         }
 341         if (is_array)
 342                 obj = list;
 343         return obj;
 344 }
 345
 346
 347 static PyObject *python_process_callchain(struct perf_sample *sample,
 348                                          struct perf_evsel *evsel,
 349                                          struct addr_location *al)
 350 {
 351         PyObject *pylist;
 352
 353         pylist = PyList_New(0);
 354         if (!pylist)
 355                 Py_FatalError("couldn't create Python list");
 356
 357         if (!symbol_conf.use_callchain || !sample->callchain)
 358                 goto exit;
 359
 360         if (thread__resolve_callchain(al->thread, &callchain_cursor, evsel,
 361                                       sample, NULL, NULL,
 362                                       scripting_max_stack) != 0) {
 363                 pr_err("Failed to resolve callchain. Skipping\n");
 364                 goto exit;
 365         }
 366         callchain_cursor_commit(&callchain_cursor);
 367
 368
 369         while (1) {
 370                 PyObject *pyelem;
 371                 struct callchain_cursor_node *node;
 372                 node = callchain_cursor_current(&callchain_cursor);
 373                 if (!node)
 374                         break;
 375
 376                 pyelem = PyDict_New();
 377                 if (!pyelem)
 378                         Py_FatalError("couldn't create Python dictionary");
 379
 380
 381                 pydict_set_item_string_decref(pyelem, "ip",
 382                                 PyLong_FromUnsignedLongLong(node->ip));
 383
 384                 if (node->sym) {
 385                         PyObject *pysym  = PyDict_New();
 386                         if (!pysym)
 387                                 Py_FatalError("couldn't create Python dictionary");
 388                         pydict_set_item_string_decref(pysym, "start",
 389                                         PyLong_FromUnsignedLongLong(node->sym->start));
 390                         pydict_set_item_string_decref(pysym, "end",
 391                                         PyLong_FromUnsignedLongLong(node->sym->end));
 392                         pydict_set_item_string_decref(pysym, "binding",
 393                                         PyInt_FromLong(node->sym->binding));
 394                         pydict_set_item_string_decref(pysym, "name",
 395                                         PyString_FromStringAndSize(node->sym->name,
 396                                                         node->sym->namelen));
 397                         pydict_set_item_string_decref(pyelem, "sym", pysym);
 398                 }
 399
 400                 if (node->map) {
 401                         struct map *map = node->map;
 402                         const char *dsoname = "[unknown]";
 403                         if (map && map->dso) {
 404                                 if (symbol_conf.show_kernel_path && map->dso->long_name)
 405                                         dsoname = map->dso->long_name;
 406                                 else
 407                                         dsoname = map->dso->name;
 408                         }
 409                         pydict_set_item_string_decref(pyelem, "dso",
 410                                         PyString_FromString(dsoname));
 411                 }
 412
 413                 callchain_cursor_advance(&callchain_cursor);
 414                 PyList_Append(pylist, pyelem);
 415                 Py_DECREF(pyelem);
 416         }
 417
 418 exit:
 419         return pylist;
 420 }
 421
 422 static PyObject *get_sample_value_as_tuple(struct sample_read_value *value)
 423 {
 424         PyObject *t;
 425
 426         t = PyTuple_New(2);
 427         if (!t)
 428                 Py_FatalError("couldn't create Python tuple");
 429         PyTuple_SetItem(t, 0, PyLong_FromUnsignedLongLong(value->id));
 430         PyTuple_SetItem(t, 1, PyLong_FromUnsignedLongLong(value->value));
 431         return t;
 432 }
 433
 434 static void set_sample_read_in_dict(PyObject *dict_sample,
 435                                          struct perf_sample *sample,
 436                                          struct perf_evsel *evsel)
 437 {
 438         u64 read_format = evsel->attr.read_format;
 439         PyObject *values;
 440         unsigned int i;
 441
 442         if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
 443                 pydict_set_item_string_decref(dict_sample, "time_enabled",
 444                         PyLong_FromUnsignedLongLong(sample->read.time_enabled));
 445         }
 446
 447         if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
 448                 pydict_set_item_string_decref(dict_sample, "time_running",
 449                         PyLong_FromUnsignedLongLong(sample->read.time_running));
 450         }
 451
 452         if (read_format & PERF_FORMAT_GROUP)
 453                 values = PyList_New(sample->read.group.nr);
 454         else
 455                 values = PyList_New(1);
 456
 457         if (!values)
 458                 Py_FatalError("couldn't create Python list");
 459
 460         if (read_format & PERF_FORMAT_GROUP) {
 461                 for (i = 0; i < sample->read.group.nr; i++) {
 462                         PyObject *t = get_sample_value_as_tuple(&sample->read.group.values[i]);
 463                         PyList_SET_ITEM(values, i, t);
 464                 }
 465         } else {
 466                 PyObject *t = get_sample_value_as_tuple(&sample->read.one);
 467                 PyList_SET_ITEM(values, 0, t);
 468         }
 469         pydict_set_item_string_decref(dict_sample, "values", values);
 470 }
 471
 472 static PyObject *get_perf_sample_dict(struct perf_sample *sample,
 473                                          struct perf_evsel *evsel,
 474                                          struct addr_location *al,
 475                                          PyObject *callchain)
 476 {
 477         PyObject *dict, *dict_sample;
 478
 479         dict = PyDict_New();
 480         if (!dict)
 481                 Py_FatalError("couldn't create Python dictionary");
 482
 483         dict_sample = PyDict_New();
 484         if (!dict_sample)
 485                 Py_FatalError("couldn't create Python dictionary");
 486
 487         pydict_set_item_string_decref(dict, "ev_name", PyString_FromString(perf_evsel__name(evsel)));
 488         pydict_set_item_string_decref(dict, "attr", PyString_FromStringAndSize(
 489                         (const char *)&evsel->attr, sizeof(evsel->attr)));
 490
 491         pydict_set_item_string_decref(dict_sample, "pid",
 492                         PyInt_FromLong(sample->pid));
 493         pydict_set_item_string_decref(dict_sample, "tid",
 494                         PyInt_FromLong(sample->tid));
 495         pydict_set_item_string_decref(dict_sample, "cpu",
 496                         PyInt_FromLong(sample->cpu));
 497         pydict_set_item_string_decref(dict_sample, "ip",
 498                         PyLong_FromUnsignedLongLong(sample->ip));
 499         pydict_set_item_string_decref(dict_sample, "time",
 500                         PyLong_FromUnsignedLongLong(sample->time));
 501         pydict_set_item_string_decref(dict_sample, "period",
 502                         PyLong_FromUnsignedLongLong(sample->period));
 503         set_sample_read_in_dict(dict_sample, sample, evsel);
 504         pydict_set_item_string_decref(dict, "sample", dict_sample);
 505
 506         pydict_set_item_string_decref(dict, "raw_buf", PyString_FromStringAndSize(
 507                         (const char *)sample->raw_data, sample->raw_size));
 508         pydict_set_item_string_decref(dict, "comm",
 509                         PyString_FromString(thread__comm_str(al->thread)));
 510         if (al->map) {
 511                 pydict_set_item_string_decref(dict, "dso",
 512                         PyString_FromString(al->map->dso->name));
 513         }
 514         if (al->sym) {
 515                 pydict_set_item_string_decref(dict, "symbol",
 516                         PyString_FromString(al->sym->name));
 517         }
 518
 519         pydict_set_item_string_decref(dict, "callchain", callchain);
 520
 521         return dict;
 522 }
 523
 524 static void python_process_tracepoint(struct perf_sample *sample,
 525                                       struct perf_evsel *evsel,
 526                                       struct addr_location *al)
 527 {
 528         struct event_format *event = evsel->tp_format;
 529         PyObject *handler, *context, *t, *obj = NULL, *callchain;
 530         PyObject *dict = NULL, *all_entries_dict = NULL;
 531         static char handler_name[256];
 532         struct format_field *field;
 533         unsigned long s, ns;
 534         unsigned n = 0;
 535         int pid;
 536         int cpu = sample->cpu;
 537         void *data = sample->raw_data;
 538         unsigned long long nsecs = sample->time;
 539         const char *comm = thread__comm_str(al->thread);
 540         const char *default_handler_name = "trace_unhandled";
 541
 542         if (!event) {
 543                 snprintf(handler_name, sizeof(handler_name),
 544                          "ug! no event found for type %" PRIu64, (u64)evsel->attr.config);
 545                 Py_FatalError(handler_name);
 546         }
 547
 548         pid = raw_field_value(event, "common_pid", data);
 549
 550         sprintf(handler_name, "%s__%s", event->system, event->name);
 551
 552         if (!test_and_set_bit(event->id, events_defined))
 553                 define_event_symbols(event, handler_name, event->print_fmt.args);
 554
 555         handler = get_handler(handler_name);
 556         if (!handler) {
 557                 handler = get_handler(default_handler_name);
 558                 if (!handler)
 559                         return;
 560                 dict = PyDict_New();
 561                 if (!dict)
 562                         Py_FatalError("couldn't create Python dict");
 563         }
 564
 565         t = PyTuple_New(MAX_FIELDS);
 566         if (!t)
 567                 Py_FatalError("couldn't create Python tuple");
 568
 569
 570         s = nsecs / NSEC_PER_SEC;
 571         ns = nsecs - s * NSEC_PER_SEC;
 572
 573         scripting_context->event_data = data;
 574         scripting_context->pevent = evsel->tp_format->pevent;
 575
 576         context = PyCObject_FromVoidPtr(scripting_context, NULL);
 577
 578         PyTuple_SetItem(t, n++, PyString_FromString(handler_name));
 579         PyTuple_SetItem(t, n++, context);
 580
 581         /* ip unwinding */
 582         callchain = python_process_callchain(sample, evsel, al);
 583         /* Need an additional reference for the perf_sample dict */
 584         Py_INCREF(callchain);
 585
 586         if (!dict) {
 587                 PyTuple_SetItem(t, n++, PyInt_FromLong(cpu));
 588                 PyTuple_SetItem(t, n++, PyInt_FromLong(s));
 589                 PyTuple_SetItem(t, n++, PyInt_FromLong(ns));
 590                 PyTuple_SetItem(t, n++, PyInt_FromLong(pid));
 591                 PyTuple_SetItem(t, n++, PyString_FromString(comm));
 592                 PyTuple_SetItem(t, n++, callchain);
 593         } else {
 594                 pydict_set_item_string_decref(dict, "common_cpu", PyInt_FromLong(cpu));
 595                 pydict_set_item_string_decref(dict, "common_s", PyInt_FromLong(s));
 596                 pydict_set_item_string_decref(dict, "common_ns", PyInt_FromLong(ns));
 597                 pydict_set_item_string_decref(dict, "common_pid", PyInt_FromLong(pid));
 598                 pydict_set_item_string_decref(dict, "common_comm", PyString_FromString(comm));
 599                 pydict_set_item_string_decref(dict, "common_callchain", callchain);
 600         }
 601         for (field = event->format.fields; field; field = field->next) {
 602                 unsigned int offset, len;
 603                 unsigned long long val;
 604
 605                 if (field->flags & FIELD_IS_ARRAY) {
 606                         offset = field->offset;
 607                         len    = field->size;
 608                         if (field->flags & FIELD_IS_DYNAMIC) {
 609                                 val     = pevent_read_number(scripting_context->pevent,
 610                                                              data + offset, len);
 611                                 offset  = val;
 612                                 len     = offset >> 16;
 613                                 offset &= 0xffff;
 614                         }
 615                         if (field->flags & FIELD_IS_STRING &&
 616                             is_printable_array(data + offset, len)) {
 617                                 obj = PyString_FromString((char *) data + offset);
 618                         } else {
 619                                 obj = PyByteArray_FromStringAndSize((const char *) data + offset, len);
 620                                 field->flags &= ~FIELD_IS_STRING;
 621                         }
 622                 } else { /* FIELD_IS_NUMERIC */
 623                         obj = get_field_numeric_entry(event, field, data);
 624                 }
 625                 if (!dict)
 626                         PyTuple_SetItem(t, n++, obj);
 627                 else
 628                         pydict_set_item_string_decref(dict, field->name, obj);
 629
 630         }
 631
 632         if (dict)
 633                 PyTuple_SetItem(t, n++, dict);
 634
 635         if (get_argument_count(handler) == (int) n + 1) {
 636                 all_entries_dict = get_perf_sample_dict(sample, evsel, al,
 637                         callchain);
 638                 PyTuple_SetItem(t, n++, all_entries_dict);
 639         } else {
 640                 Py_DECREF(callchain);
 641         }
 642
 643         if (_PyTuple_Resize(&t, n) == -1)
 644                 Py_FatalError("error resizing Python tuple");
 645
 646         if (!dict) {
 647                 call_object(handler, t, handler_name);
 648         } else {
 649                 call_object(handler, t, default_handler_name);
 650                 Py_DECREF(dict);
 651         }
 652
 653         Py_XDECREF(all_entries_dict);
 654         Py_DECREF(t);
 655 }
 656
 657 static PyObject *tuple_new(unsigned int sz)
 658 {
 659         PyObject *t;
 660
 661         t = PyTuple_New(sz);
 662         if (!t)
 663                 Py_FatalError("couldn't create Python tuple");
 664         return t;
 665 }
 666
 667 static int tuple_set_u64(PyObject *t, unsigned int pos, u64 val)
 668 {
 669 #if BITS_PER_LONG == 64
 670         return PyTuple_SetItem(t, pos, PyInt_FromLong(val));
 671 #endif
 672 #if BITS_PER_LONG == 32
 673         return PyTuple_SetItem(t, pos, PyLong_FromLongLong(val));
 674 #endif
 675 }
 676
 677 static int tuple_set_s32(PyObject *t, unsigned int pos, s32 val)
 678 {
 679         return PyTuple_SetItem(t, pos, PyInt_FromLong(val));
 680 }
 681
 682 static int tuple_set_string(PyObject *t, unsigned int pos, const char *s)
 683 {
 684         return PyTuple_SetItem(t, pos, PyString_FromString(s));
 685 }
 686
 687 static int python_export_evsel(struct db_export *dbe, struct perf_evsel *evsel)
 688 {
 689         struct tables *tables = container_of(dbe, struct tables, dbe);
 690         PyObject *t;
 691
 692         t = tuple_new(2);
 693
 694         tuple_set_u64(t, 0, evsel->db_id);
 695         tuple_set_string(t, 1, perf_evsel__name(evsel));
 696
 697         call_object(tables->evsel_handler, t, "evsel_table");
 698
 699         Py_DECREF(t);
 700
 701         return 0;
 702 }
 703
 704 static int python_export_machine(struct db_export *dbe,
 705                                  struct machine *machine)
 706 {
 707         struct tables *tables = container_of(dbe, struct tables, dbe);
 708         PyObject *t;
 709
 710         t = tuple_new(3);
 711
 712         tuple_set_u64(t, 0, machine->db_id);
 713         tuple_set_s32(t, 1, machine->pid);
 714         tuple_set_string(t, 2, machine->root_dir ? machine->root_dir : "");
 715
 716         call_object(tables->machine_handler, t, "machine_table");
 717
 718         Py_DECREF(t);
 719
 720         return 0;
 721 }
 722
 723 static int python_export_thread(struct db_export *dbe, struct thread *thread,
 724                                 u64 main_thread_db_id, struct machine *machine)
 725 {
 726         struct tables *tables = container_of(dbe, struct tables, dbe);
 727         PyObject *t;
 728
 729         t = tuple_new(5);
 730
 731         tuple_set_u64(t, 0, thread->db_id);
 732         tuple_set_u64(t, 1, machine->db_id);
 733         tuple_set_u64(t, 2, main_thread_db_id);
 734         tuple_set_s32(t, 3, thread->pid_);
 735         tuple_set_s32(t, 4, thread->tid);
 736
 737         call_object(tables->thread_handler, t, "thread_table");
 738
 739         Py_DECREF(t);
 740
 741         return 0;
 742 }
 743
 744 static int python_export_comm(struct db_export *dbe, struct comm *comm)
 745 {
 746         struct tables *tables = container_of(dbe, struct tables, dbe);
 747         PyObject *t;
 748
 749         t = tuple_new(2);
 750
 751         tuple_set_u64(t, 0, comm->db_id);
 752         tuple_set_string(t, 1, comm__str(comm));
 753
 754         call_object(tables->comm_handler, t, "comm_table");
 755
 756         Py_DECREF(t);
 757
 758         return 0;
 759 }
 760
 761 static int python_export_comm_thread(struct db_export *dbe, u64 db_id,
 762                                      struct comm *comm, struct thread *thread)
 763 {
 764         struct tables *tables = container_of(dbe, struct tables, dbe);
 765         PyObject *t;
 766
 767         t = tuple_new(3);
 768
 769         tuple_set_u64(t, 0, db_id);
 770         tuple_set_u64(t, 1, comm->db_id);
 771         tuple_set_u64(t, 2, thread->db_id);
 772
 773         call_object(tables->comm_thread_handler, t, "comm_thread_table");
 774
 775         Py_DECREF(t);
 776
 777         return 0;
 778 }
 779
 780 static int python_export_dso(struct db_export *dbe, struct dso *dso,
 781                              struct machine *machine)
 782 {
 783         struct tables *tables = container_of(dbe, struct tables, dbe);
 784         char sbuild_id[SBUILD_ID_SIZE];
 785         PyObject *t;
 786
 787         build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id);
 788
 789         t = tuple_new(5);
 790
 791         tuple_set_u64(t, 0, dso->db_id);
 792         tuple_set_u64(t, 1, machine->db_id);
 793         tuple_set_string(t, 2, dso->short_name);
 794         tuple_set_string(t, 3, dso->long_name);
 795         tuple_set_string(t, 4, sbuild_id);
 796
 797         call_object(tables->dso_handler, t, "dso_table");
 798
 799         Py_DECREF(t);
 800
 801         return 0;
 802 }
 803
 804 static int python_export_symbol(struct db_export *dbe, struct symbol *sym,
 805                                 struct dso *dso)
 806 {
 807         struct tables *tables = container_of(dbe, struct tables, dbe);
 808         u64 *sym_db_id = symbol__priv(sym);
 809         PyObject *t;
 810
 811         t = tuple_new(6);
 812
 813         tuple_set_u64(t, 0, *sym_db_id);
 814         tuple_set_u64(t, 1, dso->db_id);
 815         tuple_set_u64(t, 2, sym->start);
 816         tuple_set_u64(t, 3, sym->end);
 817         tuple_set_s32(t, 4, sym->binding);
 818         tuple_set_string(t, 5, sym->name);
 819
 820         call_object(tables->symbol_handler, t, "symbol_table");
 821
 822         Py_DECREF(t);
 823
 824         return 0;
 825 }
 826
 827 static int python_export_branch_type(struct db_export *dbe, u32 branch_type,
 828                                      const char *name)
 829 {
 830         struct tables *tables = container_of(dbe, struct tables, dbe);
 831         PyObject *t;
 832
 833         t = tuple_new(2);
 834
 835         tuple_set_s32(t, 0, branch_type);
 836         tuple_set_string(t, 1, name);
 837
 838         call_object(tables->branch_type_handler, t, "branch_type_table");
 839
 840         Py_DECREF(t);
 841
 842         return 0;
 843 }
 844
 845 static int python_export_sample(struct db_export *dbe,
 846                                 struct export_sample *es)
 847 {
 848         struct tables *tables = container_of(dbe, struct tables, dbe);
 849         PyObject *t;
 850
 851         t = tuple_new(22);
 852
 853         tuple_set_u64(t, 0, es->db_id);
 854         tuple_set_u64(t, 1, es->evsel->db_id);
 855         tuple_set_u64(t, 2, es->al->machine->db_id);
 856         tuple_set_u64(t, 3, es->al->thread->db_id);
 857         tuple_set_u64(t, 4, es->comm_db_id);
 858         tuple_set_u64(t, 5, es->dso_db_id);
 859         tuple_set_u64(t, 6, es->sym_db_id);
 860         tuple_set_u64(t, 7, es->offset);
 861         tuple_set_u64(t, 8, es->sample->ip);
 862         tuple_set_u64(t, 9, es->sample->time);
 863         tuple_set_s32(t, 10, es->sample->cpu);
 864         tuple_set_u64(t, 11, es->addr_dso_db_id);
 865         tuple_set_u64(t, 12, es->addr_sym_db_id);
 866         tuple_set_u64(t, 13, es->addr_offset);
 867         tuple_set_u64(t, 14, es->sample->addr);
 868         tuple_set_u64(t, 15, es->sample->period);
 869         tuple_set_u64(t, 16, es->sample->weight);
 870         tuple_set_u64(t, 17, es->sample->transaction);
 871         tuple_set_u64(t, 18, es->sample->data_src);
 872         tuple_set_s32(t, 19, es->sample->flags & PERF_BRANCH_MASK);
 873         tuple_set_s32(t, 20, !!(es->sample->flags & PERF_IP_FLAG_IN_TX));
 874         tuple_set_u64(t, 21, es->call_path_id);
 875
 876         call_object(tables->sample_handler, t, "sample_table");
 877
 878         Py_DECREF(t);
 879
 880         return 0;
 881 }
 882
 883 static int python_export_call_path(struct db_export *dbe, struct call_path *cp)
 884 {
 885         struct tables *tables = container_of(dbe, struct tables, dbe);
 886         PyObject *t;
 887         u64 parent_db_id, sym_db_id;
 888
 889         parent_db_id = cp->parent ? cp->parent->db_id : 0;
 890         sym_db_id = cp->sym ? *(u64 *)symbol__priv(cp->sym) : 0;
 891
 892         t = tuple_new(4);
 893
 894         tuple_set_u64(t, 0, cp->db_id);
 895         tuple_set_u64(t, 1, parent_db_id);
 896         tuple_set_u64(t, 2, sym_db_id);
 897         tuple_set_u64(t, 3, cp->ip);
 898
 899         call_object(tables->call_path_handler, t, "call_path_table");
 900
 901         Py_DECREF(t);
 902
 903         return 0;
 904 }
 905
 906 static int python_export_call_return(struct db_export *dbe,
 907                                      struct call_return *cr)
 908 {
 909         struct tables *tables = container_of(dbe, struct tables, dbe);
 910         u64 comm_db_id = cr->comm ? cr->comm->db_id : 0;
 911         PyObject *t;
 912
 913         t = tuple_new(11);
 914
 915         tuple_set_u64(t, 0, cr->db_id);
 916         tuple_set_u64(t, 1, cr->thread->db_id);
 917         tuple_set_u64(t, 2, comm_db_id);
 918         tuple_set_u64(t, 3, cr->cp->db_id);
 919         tuple_set_u64(t, 4, cr->call_time);
 920         tuple_set_u64(t, 5, cr->return_time);
 921         tuple_set_u64(t, 6, cr->branch_count);
 922         tuple_set_u64(t, 7, cr->call_ref);
 923         tuple_set_u64(t, 8, cr->return_ref);
 924         tuple_set_u64(t, 9, cr->cp->parent->db_id);
 925         tuple_set_s32(t, 10, cr->flags);
 926
 927         call_object(tables->call_return_handler, t, "call_return_table");
 928
 929         Py_DECREF(t);
 930
 931         return 0;
 932 }
 933
 934 static int python_process_call_return(struct call_return *cr, void *data)
 935 {
 936         struct db_export *dbe = data;
 937
 938         return db_export__call_return(dbe, cr);
 939 }
 940
 941 static void python_process_general_event(struct perf_sample *sample,
 942                                          struct perf_evsel *evsel,
 943                                          struct addr_location *al)
 944 {
 945         PyObject *handler, *t, *dict, *callchain;
 946         static char handler_name[64];
 947         unsigned n = 0;
 948
 949         snprintf(handler_name, sizeof(handler_name), "%s", "process_event");
 950
 951         handler = get_handler(handler_name);
 952         if (!handler)
 953                 return;
 954
 955         /*
 956          * Use the MAX_FIELDS to make the function expandable, though
 957          * currently there is only one item for the tuple.
 958          */
 959         t = PyTuple_New(MAX_FIELDS);
 960         if (!t)
 961                 Py_FatalError("couldn't create Python tuple");
 962
 963         /* ip unwinding */
 964         callchain = python_process_callchain(sample, evsel, al);
 965         dict = get_perf_sample_dict(sample, evsel, al, callchain);
 966
 967         PyTuple_SetItem(t, n++, dict);
 968         if (_PyTuple_Resize(&t, n) == -1)
 969                 Py_FatalError("error resizing Python tuple");
 970
 971         call_object(handler, t, handler_name);
 972
 973         Py_DECREF(dict);
 974         Py_DECREF(t);
 975 }
 976
 977 static void python_process_event(union perf_event *event,
 978                                  struct perf_sample *sample,
 979                                  struct perf_evsel *evsel,
 980                                  struct addr_location *al)
 981 {
 982         struct tables *tables = &tables_global;
 983
 984         switch (evsel->attr.type) {
 985         case PERF_TYPE_TRACEPOINT:
 986                 python_process_tracepoint(sample, evsel, al);
 987                 break;
 988         /* Reserve for future process_hw/sw/raw APIs */
 989         default:
 990                 if (tables->db_export_mode)
 991                         db_export__sample(&tables->dbe, event, sample, evsel, al);
 992                 else
 993                         python_process_general_event(sample, evsel, al);
 994         }
 995 }
 996
 997 static void get_handler_name(char *str, size_t size,
 998                              struct perf_evsel *evsel)
 999 {
1000         char *p = str;
1001
1002         scnprintf(str, size, "stat__%s", perf_evsel__name(evsel));
1003
1004         while ((p = strchr(p, ':'))) {
1005                 *p = '_';
1006                 p++;
1007         }
1008 }
1009
1010 static void
1011 process_stat(struct perf_evsel *counter, int cpu, int thread, u64 tstamp,
1012              struct perf_counts_values *count)
1013 {
1014         PyObject *handler, *t;
1015         static char handler_name[256];
1016         int n = 0;
1017
1018         t = PyTuple_New(MAX_FIELDS);
1019         if (!t)
1020                 Py_FatalError("couldn't create Python tuple");
1021
1022         get_handler_name(handler_name, sizeof(handler_name),
1023                          counter);
1024
1025         handler = get_handler(handler_name);
1026         if (!handler) {
1027                 pr_debug("can't find python handler %s\n", handler_name);
1028                 return;
1029         }
1030
1031         PyTuple_SetItem(t, n++, PyInt_FromLong(cpu));
1032         PyTuple_SetItem(t, n++, PyInt_FromLong(thread));
1033
1034         tuple_set_u64(t, n++, tstamp);
1035         tuple_set_u64(t, n++, count->val);
1036         tuple_set_u64(t, n++, count->ena);
1037         tuple_set_u64(t, n++, count->run);
1038
1039         if (_PyTuple_Resize(&t, n) == -1)
1040                 Py_FatalError("error resizing Python tuple");
1041
1042         call_object(handler, t, handler_name);
1043
1044         Py_DECREF(t);
1045 }
1046
1047 static void python_process_stat(struct perf_stat_config *config,
1048                                 struct perf_evsel *counter, u64 tstamp)
1049 {
1050         struct thread_map *threads = counter->threads;
1051         struct cpu_map *cpus = counter->cpus;
1052         int cpu, thread;
1053
1054         if (config->aggr_mode == AGGR_GLOBAL) {
1055                 process_stat(counter, -1, -1, tstamp,
1056                              &counter->counts->aggr);
1057                 return;
1058         }
1059
1060         for (thread = 0; thread < threads->nr; thread++) {
1061                 for (cpu = 0; cpu < cpus->nr; cpu++) {
1062                         process_stat(counter, cpus->map[cpu],
1063                                      thread_map__pid(threads, thread), tstamp,
1064                                      perf_counts(counter->counts, cpu, thread));
1065                 }
1066         }
1067 }
1068
1069 static void python_process_stat_interval(u64 tstamp)
1070 {
1071         PyObject *handler, *t;
1072         static const char handler_name[] = "stat__interval";
1073         int n = 0;
1074
1075         t = PyTuple_New(MAX_FIELDS);
1076         if (!t)
1077                 Py_FatalError("couldn't create Python tuple");
1078
1079         handler = get_handler(handler_name);
1080         if (!handler) {
1081                 pr_debug("can't find python handler %s\n", handler_name);
1082                 return;
1083         }
1084
1085         tuple_set_u64(t, n++, tstamp);
1086
1087         if (_PyTuple_Resize(&t, n) == -1)
1088                 Py_FatalError("error resizing Python tuple");
1089
1090         call_object(handler, t, handler_name);
1091
1092         Py_DECREF(t);
1093 }
1094
1095 static int run_start_sub(void)
1096 {
1097         main_module = PyImport_AddModule("__main__");
1098         if (main_module == NULL)
1099                 return -1;
1100         Py_INCREF(main_module);
1101
1102         main_dict = PyModule_GetDict(main_module);
1103         if (main_dict == NULL)
1104                 goto error;
1105         Py_INCREF(main_dict);
1106
1107         try_call_object("trace_begin", NULL);
1108
1109         return 0;
1110
1111 error:
1112         Py_XDECREF(main_dict);
1113         Py_XDECREF(main_module);
1114         return -1;
1115 }
1116
1117 #define SET_TABLE_HANDLER_(name, handler_name, table_name) do {         \
1118         tables->handler_name = get_handler(#table_name);                \
1119         if (tables->handler_name)                                       \
1120                 tables->dbe.export_ ## name = python_export_ ## name;   \
1121 } while (0)
1122
1123 #define SET_TABLE_HANDLER(name) \
1124         SET_TABLE_HANDLER_(name, name ## _handler, name ## _table)
1125
1126 static void set_table_handlers(struct tables *tables)
1127 {
1128         const char *perf_db_export_mode = "perf_db_export_mode";
1129         const char *perf_db_export_calls = "perf_db_export_calls";
1130         const char *perf_db_export_callchains = "perf_db_export_callchains";
1131         PyObject *db_export_mode, *db_export_calls, *db_export_callchains;
1132         bool export_calls = false;
1133         bool export_callchains = false;
1134         int ret;
1135
1136         memset(tables, 0, sizeof(struct tables));
1137         if (db_export__init(&tables->dbe))
1138                 Py_FatalError("failed to initialize export");
1139
1140         db_export_mode = PyDict_GetItemString(main_dict, perf_db_export_mode);
1141         if (!db_export_mode)
1142                 return;
1143
1144         ret = PyObject_IsTrue(db_export_mode);
1145         if (ret == -1)
1146                 handler_call_die(perf_db_export_mode);
1147         if (!ret)
1148                 return;
1149
1150         /* handle export calls */
1151         tables->dbe.crp = NULL;
1152         db_export_calls = PyDict_GetItemString(main_dict, perf_db_export_calls);
1153         if (db_export_calls) {
1154                 ret = PyObject_IsTrue(db_export_calls);
1155                 if (ret == -1)
1156                         handler_call_die(perf_db_export_calls);
1157                 export_calls = !!ret;
1158         }
1159
1160         if (export_calls) {
1161                 tables->dbe.crp =
1162                         call_return_processor__new(python_process_call_return,
1163                                                    &tables->dbe);
1164                 if (!tables->dbe.crp)
1165                         Py_FatalError("failed to create calls processor");
1166         }
1167
1168         /* handle export callchains */
1169         tables->dbe.cpr = NULL;
1170         db_export_callchains = PyDict_GetItemString(main_dict,
1171                                                     perf_db_export_callchains);
1172         if (db_export_callchains) {
1173                 ret = PyObject_IsTrue(db_export_callchains);
1174                 if (ret == -1)
1175                         handler_call_die(perf_db_export_callchains);
1176                 export_callchains = !!ret;
1177         }
1178
1179         if (export_callchains) {
1180                 /*
1181                  * Attempt to use the call path root from the call return
1182                  * processor, if the call return processor is in use. Otherwise,
1183                  * we allocate a new call path root. This prevents exporting
1184                  * duplicate call path ids when both are in use simultaniously.
1185                  */
1186                 if (tables->dbe.crp)
1187                         tables->dbe.cpr = tables->dbe.crp->cpr;
1188                 else
1189                         tables->dbe.cpr = call_path_root__new();
1190
1191                 if (!tables->dbe.cpr)
1192                         Py_FatalError("failed to create call path root");
1193         }
1194
1195         tables->db_export_mode = true;
1196         /*
1197          * Reserve per symbol space for symbol->db_id via symbol__priv()
1198          */
1199         symbol_conf.priv_size = sizeof(u64);
1200
1201         SET_TABLE_HANDLER(evsel);
1202         SET_TABLE_HANDLER(machine);
1203         SET_TABLE_HANDLER(thread);
1204         SET_TABLE_HANDLER(comm);
1205         SET_TABLE_HANDLER(comm_thread);
1206         SET_TABLE_HANDLER(dso);
1207         SET_TABLE_HANDLER(symbol);
1208         SET_TABLE_HANDLER(branch_type);
1209         SET_TABLE_HANDLER(sample);
1210         SET_TABLE_HANDLER(call_path);
1211         SET_TABLE_HANDLER(call_return);
1212 }
1213
1214 /*
1215  * Start trace script
1216  */
1217 static int python_start_script(const char *script, int argc, const char **argv)
1218 {
1219         struct tables *tables = &tables_global;
1220         const char **command_line;
1221         char buf[PATH_MAX];
1222         int i, err = 0;
1223         FILE *fp;
1224
1225         command_line = malloc((argc + 1) * sizeof(const char *));
1226         command_line[0] = script;
1227         for (i = 1; i < argc + 1; i++)
1228                 command_line[i] = argv[i - 1];
1229
1230         Py_Initialize();
1231
1232         initperf_trace_context();
1233
1234         PySys_SetArgv(argc + 1, (char **)command_line);
1235
1236         fp = fopen(script, "r");
1237         if (!fp) {
1238                 sprintf(buf, "Can't open python script \"%s\"", script);
1239                 perror(buf);
1240                 err = -1;
1241                 goto error;
1242         }
1243
1244         err = PyRun_SimpleFile(fp, script);
1245         if (err) {
1246                 fprintf(stderr, "Error running python script %s\n", script);
1247                 goto error;
1248         }
1249
1250         err = run_start_sub();
1251         if (err) {
1252                 fprintf(stderr, "Error starting python script %s\n", script);
1253                 goto error;
1254         }
1255
1256         set_table_handlers(tables);
1257
1258         if (tables->db_export_mode) {
1259                 err = db_export__branch_types(&tables->dbe);
1260                 if (err)
1261                         goto error;
1262         }
1263
1264         free(command_line);
1265
1266         return err;
1267 error:
1268         Py_Finalize();
1269         free(command_line);
1270
1271         return err;
1272 }
1273
1274 static int python_flush_script(void)
1275 {
1276         struct tables *tables = &tables_global;
1277
1278         return db_export__flush(&tables->dbe);
1279 }
1280
1281 /*
1282  * Stop trace script
1283  */
1284 static int python_stop_script(void)
1285 {
1286         struct tables *tables = &tables_global;
1287
1288         try_call_object("trace_end", NULL);
1289
1290         db_export__exit(&tables->dbe);
1291
1292         Py_XDECREF(main_dict);
1293         Py_XDECREF(main_module);
1294         Py_Finalize();
1295
1296         return 0;
1297 }
1298
1299 static int python_generate_script(struct pevent *pevent, const char *outfile)
1300 {
1301         struct event_format *event = NULL;
1302         struct format_field *f;
1303         char fname[PATH_MAX];
1304         int not_first, count;
1305         FILE *ofp;
1306
1307         sprintf(fname, "%s.py", outfile);
1308         ofp = fopen(fname, "w");
1309         if (ofp == NULL) {
1310                 fprintf(stderr, "couldn't open %s\n", fname);
1311                 return -1;
1312         }
1313         fprintf(ofp, "# perf script event handlers, "
1314                 "generated by perf script -g python\n");
1315
1316         fprintf(ofp, "# Licensed under the terms of the GNU GPL"
1317                 " License version 2\n\n");
1318
1319         fprintf(ofp, "# The common_* event handler fields are the most useful "
1320                 "fields common to\n");
1321
1322         fprintf(ofp, "# all events.  They don't necessarily correspond to "
1323                 "the 'common_*' fields\n");
1324
1325         fprintf(ofp, "# in the format files.  Those fields not available as "
1326                 "handler params can\n");
1327
1328         fprintf(ofp, "# be retrieved using Python functions of the form "
1329                 "common_*(context).\n");
1330
1331         fprintf(ofp, "# See the perf-script-python Documentation for the list "
1332                 "of available functions.\n\n");
1333
1334         fprintf(ofp, "import os\n");
1335         fprintf(ofp, "import sys\n\n");
1336
1337         fprintf(ofp, "sys.path.append(os.environ['PERF_EXEC_PATH'] + \\\n");
1338         fprintf(ofp, "\t'/scripts/python/Perf-Trace-Util/lib/Perf/Trace')\n");
1339         fprintf(ofp, "\nfrom perf_trace_context import *\n");
1340         fprintf(ofp, "from Core import *\n\n\n");
1341
1342         fprintf(ofp, "def trace_begin():\n");
1343         fprintf(ofp, "\tprint \"in trace_begin\"\n\n");
1344
1345         fprintf(ofp, "def trace_end():\n");
1346         fprintf(ofp, "\tprint \"in trace_end\"\n\n");
1347
1348         while ((event = trace_find_next_event(pevent, event))) {
1349                 fprintf(ofp, "def %s__%s(", event->system, event->name);
1350                 fprintf(ofp, "event_name, ");
1351                 fprintf(ofp, "context, ");
1352                 fprintf(ofp, "common_cpu,\n");
1353                 fprintf(ofp, "\tcommon_secs, ");
1354                 fprintf(ofp, "common_nsecs, ");
1355                 fprintf(ofp, "common_pid, ");
1356                 fprintf(ofp, "common_comm,\n\t");
1357                 fprintf(ofp, "common_callchain, ");
1358
1359                 not_first = 0;
1360                 count = 0;
1361
1362                 for (f = event->format.fields; f; f = f->next) {
1363                         if (not_first++)
1364                                 fprintf(ofp, ", ");
1365                         if (++count % 5 == 0)
1366                                 fprintf(ofp, "\n\t");
1367
1368                         fprintf(ofp, "%s", f->name);
1369                 }
1370                 if (not_first++)
1371                         fprintf(ofp, ", ");
1372                 if (++count % 5 == 0)
1373                         fprintf(ofp, "\n\t\t");
1374                 fprintf(ofp, "perf_sample_dict");
1375
1376                 fprintf(ofp, "):\n");
1377
1378                 fprintf(ofp, "\t\tprint_header(event_name, common_cpu, "
1379                         "common_secs, common_nsecs,\n\t\t\t"
1380                         "common_pid, common_comm)\n\n");
1381
1382                 fprintf(ofp, "\t\tprint \"");
1383
1384                 not_first = 0;
1385                 count = 0;
1386
1387                 for (f = event->format.fields; f; f = f->next) {
1388                         if (not_first++)
1389                                 fprintf(ofp, ", ");
1390                         if (count && count % 3 == 0) {
1391                                 fprintf(ofp, "\" \\\n\t\t\"");
1392                         }
1393                         count++;
1394
1395                         fprintf(ofp, "%s=", f->name);
1396                         if (f->flags & FIELD_IS_STRING ||
1397                             f->flags & FIELD_IS_FLAG ||
1398                             f->flags & FIELD_IS_ARRAY ||
1399                             f->flags & FIELD_IS_SYMBOLIC)
1400                                 fprintf(ofp, "%%s");
1401                         else if (f->flags & FIELD_IS_SIGNED)
1402                                 fprintf(ofp, "%%d");
1403                         else
1404                                 fprintf(ofp, "%%u");
1405                 }
1406
1407                 fprintf(ofp, "\" %% \\\n\t\t(");
1408
1409                 not_first = 0;
1410                 count = 0;
1411
1412                 for (f = event->format.fields; f; f = f->next) {
1413                         if (not_first++)
1414                                 fprintf(ofp, ", ");
1415
1416                         if (++count % 5 == 0)
1417                                 fprintf(ofp, "\n\t\t");
1418
1419                         if (f->flags & FIELD_IS_FLAG) {
1420                                 if ((count - 1) % 5 != 0) {
1421                                         fprintf(ofp, "\n\t\t");
1422                                         count = 4;
1423                                 }
1424                                 fprintf(ofp, "flag_str(\"");
1425                                 fprintf(ofp, "%s__%s\", ", event->system,
1426                                         event->name);
1427                                 fprintf(ofp, "\"%s\", %s)", f->name,
1428                                         f->name);
1429                         } else if (f->flags & FIELD_IS_SYMBOLIC) {
1430                                 if ((count - 1) % 5 != 0) {
1431                                         fprintf(ofp, "\n\t\t");
1432                                         count = 4;
1433                                 }
1434                                 fprintf(ofp, "symbol_str(\"");
1435                                 fprintf(ofp, "%s__%s\", ", event->system,
1436                                         event->name);
1437                                 fprintf(ofp, "\"%s\", %s)", f->name,
1438                                         f->name);
1439                         } else
1440                                 fprintf(ofp, "%s", f->name);
1441                 }
1442
1443                 fprintf(ofp, ")\n\n");
1444
1445                 fprintf(ofp, "\t\tprint 'Sample: {'+"
1446                         "get_dict_as_string(perf_sample_dict['sample'], ', ')+'}'\n\n");
1447
1448                 fprintf(ofp, "\t\tfor node in common_callchain:");
1449                 fprintf(ofp, "\n\t\t\tif 'sym' in node:");
1450                 fprintf(ofp, "\n\t\t\t\tprint \"\\t[%%x] %%s\" %% (node['ip'], node['sym']['name'])");
1451                 fprintf(ofp, "\n\t\t\telse:");
1452                 fprintf(ofp, "\n\t\t\t\tprint \"\t[%%x]\" %% (node['ip'])\n\n");
1453                 fprintf(ofp, "\t\tprint \"\\n\"\n\n");
1454
1455         }
1456
1457         fprintf(ofp, "def trace_unhandled(event_name, context, "
1458                 "event_fields_dict, perf_sample_dict):\n");
1459
1460         fprintf(ofp, "\t\tprint get_dict_as_string(event_fields_dict)\n");
1461         fprintf(ofp, "\t\tprint 'Sample: {'+"
1462                 "get_dict_as_string(perf_sample_dict['sample'], ', ')+'}'\n\n");
1463
1464         fprintf(ofp, "def print_header("
1465                 "event_name, cpu, secs, nsecs, pid, comm):\n"
1466                 "\tprint \"%%-20s %%5u %%05u.%%09u %%8u %%-20s \" %% \\\n\t"
1467                 "(event_name, cpu, secs, nsecs, pid, comm),\n\n");
1468
1469         fprintf(ofp, "def get_dict_as_string(a_dict, delimiter=' '):\n"
1470                 "\treturn delimiter.join"
1471                 "(['%%s=%%s'%%(k,str(v))for k,v in sorted(a_dict.items())])\n");
1472
1473         fclose(ofp);
1474
1475         fprintf(stderr, "generated Python script: %s\n", fname);
1476
1477         return 0;
1478 }
1479
1480 struct scripting_ops python_scripting_ops = {
1481         .name                   = "Python",
1482         .start_script           = python_start_script,
1483         .flush_script           = python_flush_script,
1484         .stop_script            = python_stop_script,
1485         .process_event          = python_process_event,
1486         .process_stat           = python_process_stat,
1487         .process_stat_interval  = python_process_stat_interval,
1488         .generate_script        = python_generate_script,
1489 };