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 <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 "../build-id.h"
  35#include "../counts.h"
  36#include "../debug.h"
  37#include "../dso.h"
  38#include "../callchain.h"
  39#include "../evsel.h"
  40#include "../event.h"
  41#include "../thread.h"
  42#include "../comm.h"
  43#include "../machine.h"
  44#include "../db-export.h"
  45#include "../thread-stack.h"
  46#include "../trace-event.h"
  47#include "../call-path.h"
  48#include "map.h"
  49#include "symbol.h"
  50#include "thread_map.h"
  51#include "print_binary.h"
  52#include "stat.h"
  53#include "mem-events.h"
  54
  55#if PY_MAJOR_VERSION < 3
  56#define _PyUnicode_FromString(arg) \
  57  PyString_FromString(arg)
  58#define _PyUnicode_FromStringAndSize(arg1, arg2) \
  59  PyString_FromStringAndSize((arg1), (arg2))
  60#define _PyBytes_FromStringAndSize(arg1, arg2) \
  61  PyString_FromStringAndSize((arg1), (arg2))
  62#define _PyLong_FromLong(arg) \
  63  PyInt_FromLong(arg)
  64#define _PyLong_AsLong(arg) \
  65  PyInt_AsLong(arg)
  66#define _PyCapsule_New(arg1, arg2, arg3) \
  67  PyCObject_FromVoidPtr((arg1), (arg2))
  68
  69PyMODINIT_FUNC initperf_trace_context(void);
  70#else
  71#define _PyUnicode_FromString(arg) \
  72  PyUnicode_FromString(arg)
  73#define _PyUnicode_FromStringAndSize(arg1, arg2) \
  74  PyUnicode_FromStringAndSize((arg1), (arg2))
  75#define _PyBytes_FromStringAndSize(arg1, arg2) \
  76  PyBytes_FromStringAndSize((arg1), (arg2))
  77#define _PyLong_FromLong(arg) \
  78  PyLong_FromLong(arg)
  79#define _PyLong_AsLong(arg) \
  80  PyLong_AsLong(arg)
  81#define _PyCapsule_New(arg1, arg2, arg3) \
  82  PyCapsule_New((arg1), (arg2), (arg3))
  83
  84PyMODINIT_FUNC PyInit_perf_trace_context(void);
  85#endif
  86
  87#define TRACE_EVENT_TYPE_MAX				\
  88	((1 << (sizeof(unsigned short) * 8)) - 1)
  89
  90static DECLARE_BITMAP(events_defined, TRACE_EVENT_TYPE_MAX);
  91
  92#define MAX_FIELDS	64
  93#define N_COMMON_FIELDS	7
  94
  95extern struct scripting_context *scripting_context;
  96
  97static char *cur_field_name;
  98static int zero_flag_atom;
  99
 100static PyObject *main_module, *main_dict;
 101
 102struct tables {
 103	struct db_export	dbe;
 104	PyObject		*evsel_handler;
 105	PyObject		*machine_handler;
 106	PyObject		*thread_handler;
 107	PyObject		*comm_handler;
 108	PyObject		*comm_thread_handler;
 109	PyObject		*dso_handler;
 110	PyObject		*symbol_handler;
 111	PyObject		*branch_type_handler;
 112	PyObject		*sample_handler;
 113	PyObject		*call_path_handler;
 114	PyObject		*call_return_handler;
 115	PyObject		*synth_handler;
 116	PyObject		*context_switch_handler;
 117	bool			db_export_mode;
 118};
 119
 120static struct tables tables_global;
 121
 122static void handler_call_die(const char *handler_name) __noreturn;
 123static void handler_call_die(const char *handler_name)
 124{
 125	PyErr_Print();
 126	Py_FatalError("problem in Python trace event handler");
 127	// Py_FatalError does not return
 128	// but we have to make the compiler happy
 129	abort();
 130}
 131
 132/*
 133 * Insert val into into the dictionary and decrement the reference counter.
 134 * This is necessary for dictionaries since PyDict_SetItemString() does not
 135 * steal a reference, as opposed to PyTuple_SetItem().
 136 */
 137static void pydict_set_item_string_decref(PyObject *dict, const char *key, PyObject *val)
 138{
 139	PyDict_SetItemString(dict, key, val);
 140	Py_DECREF(val);
 141}
 142
 143static PyObject *get_handler(const char *handler_name)
 144{
 145	PyObject *handler;
 146
 147	handler = PyDict_GetItemString(main_dict, handler_name);
 148	if (handler && !PyCallable_Check(handler))
 149		return NULL;
 150	return handler;
 151}
 152
 153static int get_argument_count(PyObject *handler)
 154{
 155	int arg_count = 0;
 156
 157	/*
 158	 * The attribute for the code object is func_code in Python 2,
 159	 * whereas it is __code__ in Python 3.0+.
 160	 */
 161	PyObject *code_obj = PyObject_GetAttrString(handler,
 162		"func_code");
 163	if (PyErr_Occurred()) {
 164		PyErr_Clear();
 165		code_obj = PyObject_GetAttrString(handler,
 166			"__code__");
 167	}
 168	PyErr_Clear();
 169	if (code_obj) {
 170		PyObject *arg_count_obj = PyObject_GetAttrString(code_obj,
 171			"co_argcount");
 172		if (arg_count_obj) {
 173			arg_count = (int) _PyLong_AsLong(arg_count_obj);
 174			Py_DECREF(arg_count_obj);
 175		}
 176		Py_DECREF(code_obj);
 177	}
 178	return arg_count;
 179}
 180
 181static void call_object(PyObject *handler, PyObject *args, const char *die_msg)
 182{
 183	PyObject *retval;
 184
 185	retval = PyObject_CallObject(handler, args);
 186	if (retval == NULL)
 187		handler_call_die(die_msg);
 188	Py_DECREF(retval);
 189}
 190
 191static void try_call_object(const char *handler_name, PyObject *args)
 192{
 193	PyObject *handler;
 194
 195	handler = get_handler(handler_name);
 196	if (handler)
 197		call_object(handler, args, handler_name);
 198}
 199
 200static void define_value(enum tep_print_arg_type field_type,
 201			 const char *ev_name,
 202			 const char *field_name,
 203			 const char *field_value,
 204			 const char *field_str)
 205{
 206	const char *handler_name = "define_flag_value";
 207	PyObject *t;
 208	unsigned long long value;
 209	unsigned n = 0;
 210
 211	if (field_type == TEP_PRINT_SYMBOL)
 212		handler_name = "define_symbolic_value";
 213
 214	t = PyTuple_New(4);
 215	if (!t)
 216		Py_FatalError("couldn't create Python tuple");
 217
 218	value = eval_flag(field_value);
 219
 220	PyTuple_SetItem(t, n++, _PyUnicode_FromString(ev_name));
 221	PyTuple_SetItem(t, n++, _PyUnicode_FromString(field_name));
 222	PyTuple_SetItem(t, n++, _PyLong_FromLong(value));
 223	PyTuple_SetItem(t, n++, _PyUnicode_FromString(field_str));
 224
 225	try_call_object(handler_name, t);
 226
 227	Py_DECREF(t);
 228}
 229
 230static void define_values(enum tep_print_arg_type field_type,
 231			  struct tep_print_flag_sym *field,
 232			  const char *ev_name,
 233			  const char *field_name)
 234{
 235	define_value(field_type, ev_name, field_name, field->value,
 236		     field->str);
 237
 238	if (field->next)
 239		define_values(field_type, field->next, ev_name, field_name);
 240}
 241
 242static void define_field(enum tep_print_arg_type field_type,
 243			 const char *ev_name,
 244			 const char *field_name,
 245			 const char *delim)
 246{
 247	const char *handler_name = "define_flag_field";
 248	PyObject *t;
 249	unsigned n = 0;
 250
 251	if (field_type == TEP_PRINT_SYMBOL)
 252		handler_name = "define_symbolic_field";
 253
 254	if (field_type == TEP_PRINT_FLAGS)
 255		t = PyTuple_New(3);
 256	else
 257		t = PyTuple_New(2);
 258	if (!t)
 259		Py_FatalError("couldn't create Python tuple");
 260
 261	PyTuple_SetItem(t, n++, _PyUnicode_FromString(ev_name));
 262	PyTuple_SetItem(t, n++, _PyUnicode_FromString(field_name));
 263	if (field_type == TEP_PRINT_FLAGS)
 264		PyTuple_SetItem(t, n++, _PyUnicode_FromString(delim));
 265
 266	try_call_object(handler_name, t);
 267
 268	Py_DECREF(t);
 269}
 270
 271static void define_event_symbols(struct tep_event *event,
 272				 const char *ev_name,
 273				 struct tep_print_arg *args)
 274{
 275	if (args == NULL)
 276		return;
 277
 278	switch (args->type) {
 279	case TEP_PRINT_NULL:
 280		break;
 281	case TEP_PRINT_ATOM:
 282		define_value(TEP_PRINT_FLAGS, ev_name, cur_field_name, "0",
 283			     args->atom.atom);
 284		zero_flag_atom = 0;
 285		break;
 286	case TEP_PRINT_FIELD:
 287		free(cur_field_name);
 288		cur_field_name = strdup(args->field.name);
 289		break;
 290	case TEP_PRINT_FLAGS:
 291		define_event_symbols(event, ev_name, args->flags.field);
 292		define_field(TEP_PRINT_FLAGS, ev_name, cur_field_name,
 293			     args->flags.delim);
 294		define_values(TEP_PRINT_FLAGS, args->flags.flags, ev_name,
 295			      cur_field_name);
 296		break;
 297	case TEP_PRINT_SYMBOL:
 298		define_event_symbols(event, ev_name, args->symbol.field);
 299		define_field(TEP_PRINT_SYMBOL, ev_name, cur_field_name, NULL);
 300		define_values(TEP_PRINT_SYMBOL, args->symbol.symbols, ev_name,
 301			      cur_field_name);
 302		break;
 303	case TEP_PRINT_HEX:
 304	case TEP_PRINT_HEX_STR:
 305		define_event_symbols(event, ev_name, args->hex.field);
 306		define_event_symbols(event, ev_name, args->hex.size);
 307		break;
 308	case TEP_PRINT_INT_ARRAY:
 309		define_event_symbols(event, ev_name, args->int_array.field);
 310		define_event_symbols(event, ev_name, args->int_array.count);
 311		define_event_symbols(event, ev_name, args->int_array.el_size);
 312		break;
 313	case TEP_PRINT_STRING:
 314		break;
 315	case TEP_PRINT_TYPE:
 316		define_event_symbols(event, ev_name, args->typecast.item);
 317		break;
 318	case TEP_PRINT_OP:
 319		if (strcmp(args->op.op, ":") == 0)
 320			zero_flag_atom = 1;
 321		define_event_symbols(event, ev_name, args->op.left);
 322		define_event_symbols(event, ev_name, args->op.right);
 323		break;
 324	default:
 325		/* gcc warns for these? */
 326	case TEP_PRINT_BSTRING:
 327	case TEP_PRINT_DYNAMIC_ARRAY:
 328	case TEP_PRINT_DYNAMIC_ARRAY_LEN:
 329	case TEP_PRINT_FUNC:
 330	case TEP_PRINT_BITMASK:
 331		/* we should warn... */
 332		return;
 333	}
 334
 335	if (args->next)
 336		define_event_symbols(event, ev_name, args->next);
 337}
 338
 339static PyObject *get_field_numeric_entry(struct tep_event *event,
 340		struct tep_format_field *field, void *data)
 341{
 342	bool is_array = field->flags & TEP_FIELD_IS_ARRAY;
 343	PyObject *obj = NULL, *list = NULL;
 344	unsigned long long val;
 345	unsigned int item_size, n_items, i;
 346
 347	if (is_array) {
 348		list = PyList_New(field->arraylen);
 349		item_size = field->size / field->arraylen;
 350		n_items = field->arraylen;
 351	} else {
 352		item_size = field->size;
 353		n_items = 1;
 354	}
 355
 356	for (i = 0; i < n_items; i++) {
 357
 358		val = read_size(event, data + field->offset + i * item_size,
 359				item_size);
 360		if (field->flags & TEP_FIELD_IS_SIGNED) {
 361			if ((long long)val >= LONG_MIN &&
 362					(long long)val <= LONG_MAX)
 363				obj = _PyLong_FromLong(val);
 364			else
 365				obj = PyLong_FromLongLong(val);
 366		} else {
 367			if (val <= LONG_MAX)
 368				obj = _PyLong_FromLong(val);
 369			else
 370				obj = PyLong_FromUnsignedLongLong(val);
 371		}
 372		if (is_array)
 373			PyList_SET_ITEM(list, i, obj);
 374	}
 375	if (is_array)
 376		obj = list;
 377	return obj;
 378}
 379
 380static const char *get_dsoname(struct map *map)
 381{
 382	const char *dsoname = "[unknown]";
 383
 384	if (map && map->dso) {
 385		if (symbol_conf.show_kernel_path && map->dso->long_name)
 386			dsoname = map->dso->long_name;
 387		else
 388			dsoname = map->dso->name;
 389	}
 390
 391	return dsoname;
 392}
 393
 394static PyObject *python_process_callchain(struct perf_sample *sample,
 395					 struct evsel *evsel,
 396					 struct addr_location *al)
 397{
 398	PyObject *pylist;
 399
 400	pylist = PyList_New(0);
 401	if (!pylist)
 402		Py_FatalError("couldn't create Python list");
 403
 404	if (!symbol_conf.use_callchain || !sample->callchain)
 405		goto exit;
 406
 407	if (thread__resolve_callchain(al->thread, &callchain_cursor, evsel,
 408				      sample, NULL, NULL,
 409				      scripting_max_stack) != 0) {
 410		pr_err("Failed to resolve callchain. Skipping\n");
 411		goto exit;
 412	}
 413	callchain_cursor_commit(&callchain_cursor);
 414
 415
 416	while (1) {
 417		PyObject *pyelem;
 418		struct callchain_cursor_node *node;
 419		node = callchain_cursor_current(&callchain_cursor);
 420		if (!node)
 421			break;
 422
 423		pyelem = PyDict_New();
 424		if (!pyelem)
 425			Py_FatalError("couldn't create Python dictionary");
 426
 427
 428		pydict_set_item_string_decref(pyelem, "ip",
 429				PyLong_FromUnsignedLongLong(node->ip));
 430
 431		if (node->sym) {
 432			PyObject *pysym  = PyDict_New();
 433			if (!pysym)
 434				Py_FatalError("couldn't create Python dictionary");
 435			pydict_set_item_string_decref(pysym, "start",
 436					PyLong_FromUnsignedLongLong(node->sym->start));
 437			pydict_set_item_string_decref(pysym, "end",
 438					PyLong_FromUnsignedLongLong(node->sym->end));
 439			pydict_set_item_string_decref(pysym, "binding",
 440					_PyLong_FromLong(node->sym->binding));
 441			pydict_set_item_string_decref(pysym, "name",
 442					_PyUnicode_FromStringAndSize(node->sym->name,
 443							node->sym->namelen));
 444			pydict_set_item_string_decref(pyelem, "sym", pysym);
 445		}
 446
 447		if (node->map) {
 448			const char *dsoname = get_dsoname(node->map);
 449
 450			pydict_set_item_string_decref(pyelem, "dso",
 451					_PyUnicode_FromString(dsoname));
 452		}
 453
 454		callchain_cursor_advance(&callchain_cursor);
 455		PyList_Append(pylist, pyelem);
 456		Py_DECREF(pyelem);
 457	}
 458
 459exit:
 460	return pylist;
 461}
 462
 463static PyObject *python_process_brstack(struct perf_sample *sample,
 464					struct thread *thread)
 465{
 466	struct branch_stack *br = sample->branch_stack;
 
 467	PyObject *pylist;
 468	u64 i;
 469
 470	pylist = PyList_New(0);
 471	if (!pylist)
 472		Py_FatalError("couldn't create Python list");
 473
 474	if (!(br && br->nr))
 475		goto exit;
 476
 477	for (i = 0; i < br->nr; i++) {
 478		PyObject *pyelem;
 479		struct addr_location al;
 480		const char *dsoname;
 481
 482		pyelem = PyDict_New();
 483		if (!pyelem)
 484			Py_FatalError("couldn't create Python dictionary");
 485
 486		pydict_set_item_string_decref(pyelem, "from",
 487		    PyLong_FromUnsignedLongLong(br->entries[i].from));
 488		pydict_set_item_string_decref(pyelem, "to",
 489		    PyLong_FromUnsignedLongLong(br->entries[i].to));
 490		pydict_set_item_string_decref(pyelem, "mispred",
 491		    PyBool_FromLong(br->entries[i].flags.mispred));
 492		pydict_set_item_string_decref(pyelem, "predicted",
 493		    PyBool_FromLong(br->entries[i].flags.predicted));
 494		pydict_set_item_string_decref(pyelem, "in_tx",
 495		    PyBool_FromLong(br->entries[i].flags.in_tx));
 496		pydict_set_item_string_decref(pyelem, "abort",
 497		    PyBool_FromLong(br->entries[i].flags.abort));
 498		pydict_set_item_string_decref(pyelem, "cycles",
 499		    PyLong_FromUnsignedLongLong(br->entries[i].flags.cycles));
 500
 501		thread__find_map_fb(thread, sample->cpumode,
 502				    br->entries[i].from, &al);
 503		dsoname = get_dsoname(al.map);
 504		pydict_set_item_string_decref(pyelem, "from_dsoname",
 505					      _PyUnicode_FromString(dsoname));
 506
 507		thread__find_map_fb(thread, sample->cpumode,
 508				    br->entries[i].to, &al);
 509		dsoname = get_dsoname(al.map);
 510		pydict_set_item_string_decref(pyelem, "to_dsoname",
 511					      _PyUnicode_FromString(dsoname));
 512
 513		PyList_Append(pylist, pyelem);
 514		Py_DECREF(pyelem);
 515	}
 516
 517exit:
 518	return pylist;
 519}
 520
 521static unsigned long get_offset(struct symbol *sym, struct addr_location *al)
 522{
 523	unsigned long offset;
 524
 525	if (al->addr < sym->end)
 526		offset = al->addr - sym->start;
 527	else
 528		offset = al->addr - al->map->start - sym->start;
 529
 530	return offset;
 531}
 532
 533static int get_symoff(struct symbol *sym, struct addr_location *al,
 534		      bool print_off, char *bf, int size)
 535{
 536	unsigned long offset;
 537
 538	if (!sym || !sym->name[0])
 539		return scnprintf(bf, size, "%s", "[unknown]");
 540
 541	if (!print_off)
 542		return scnprintf(bf, size, "%s", sym->name);
 543
 544	offset = get_offset(sym, al);
 545
 546	return scnprintf(bf, size, "%s+0x%x", sym->name, offset);
 547}
 548
 549static int get_br_mspred(struct branch_flags *flags, char *bf, int size)
 550{
 551	if (!flags->mispred  && !flags->predicted)
 552		return scnprintf(bf, size, "%s", "-");
 553
 554	if (flags->mispred)
 555		return scnprintf(bf, size, "%s", "M");
 556
 557	return scnprintf(bf, size, "%s", "P");
 558}
 559
 560static PyObject *python_process_brstacksym(struct perf_sample *sample,
 561					   struct thread *thread)
 562{
 563	struct branch_stack *br = sample->branch_stack;
 
 564	PyObject *pylist;
 565	u64 i;
 566	char bf[512];
 567	struct addr_location al;
 568
 569	pylist = PyList_New(0);
 570	if (!pylist)
 571		Py_FatalError("couldn't create Python list");
 572
 573	if (!(br && br->nr))
 574		goto exit;
 575
 576	for (i = 0; i < br->nr; i++) {
 577		PyObject *pyelem;
 578
 579		pyelem = PyDict_New();
 580		if (!pyelem)
 581			Py_FatalError("couldn't create Python dictionary");
 582
 583		thread__find_symbol_fb(thread, sample->cpumode,
 584				       br->entries[i].from, &al);
 585		get_symoff(al.sym, &al, true, bf, sizeof(bf));
 586		pydict_set_item_string_decref(pyelem, "from",
 587					      _PyUnicode_FromString(bf));
 588
 589		thread__find_symbol_fb(thread, sample->cpumode,
 590				       br->entries[i].to, &al);
 591		get_symoff(al.sym, &al, true, bf, sizeof(bf));
 592		pydict_set_item_string_decref(pyelem, "to",
 593					      _PyUnicode_FromString(bf));
 594
 595		get_br_mspred(&br->entries[i].flags, bf, sizeof(bf));
 596		pydict_set_item_string_decref(pyelem, "pred",
 597					      _PyUnicode_FromString(bf));
 598
 599		if (br->entries[i].flags.in_tx) {
 600			pydict_set_item_string_decref(pyelem, "in_tx",
 601					      _PyUnicode_FromString("X"));
 602		} else {
 603			pydict_set_item_string_decref(pyelem, "in_tx",
 604					      _PyUnicode_FromString("-"));
 605		}
 606
 607		if (br->entries[i].flags.abort) {
 608			pydict_set_item_string_decref(pyelem, "abort",
 609					      _PyUnicode_FromString("A"));
 610		} else {
 611			pydict_set_item_string_decref(pyelem, "abort",
 612					      _PyUnicode_FromString("-"));
 613		}
 614
 615		PyList_Append(pylist, pyelem);
 616		Py_DECREF(pyelem);
 617	}
 618
 619exit:
 620	return pylist;
 621}
 622
 623static PyObject *get_sample_value_as_tuple(struct sample_read_value *value)
 624{
 625	PyObject *t;
 626
 627	t = PyTuple_New(2);
 628	if (!t)
 629		Py_FatalError("couldn't create Python tuple");
 630	PyTuple_SetItem(t, 0, PyLong_FromUnsignedLongLong(value->id));
 631	PyTuple_SetItem(t, 1, PyLong_FromUnsignedLongLong(value->value));
 632	return t;
 633}
 634
 635static void set_sample_read_in_dict(PyObject *dict_sample,
 636					 struct perf_sample *sample,
 637					 struct evsel *evsel)
 638{
 639	u64 read_format = evsel->core.attr.read_format;
 640	PyObject *values;
 641	unsigned int i;
 642
 643	if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
 644		pydict_set_item_string_decref(dict_sample, "time_enabled",
 645			PyLong_FromUnsignedLongLong(sample->read.time_enabled));
 646	}
 647
 648	if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
 649		pydict_set_item_string_decref(dict_sample, "time_running",
 650			PyLong_FromUnsignedLongLong(sample->read.time_running));
 651	}
 652
 653	if (read_format & PERF_FORMAT_GROUP)
 654		values = PyList_New(sample->read.group.nr);
 655	else
 656		values = PyList_New(1);
 657
 658	if (!values)
 659		Py_FatalError("couldn't create Python list");
 660
 661	if (read_format & PERF_FORMAT_GROUP) {
 662		for (i = 0; i < sample->read.group.nr; i++) {
 663			PyObject *t = get_sample_value_as_tuple(&sample->read.group.values[i]);
 664			PyList_SET_ITEM(values, i, t);
 665		}
 666	} else {
 667		PyObject *t = get_sample_value_as_tuple(&sample->read.one);
 668		PyList_SET_ITEM(values, 0, t);
 669	}
 670	pydict_set_item_string_decref(dict_sample, "values", values);
 671}
 672
 673static void set_sample_datasrc_in_dict(PyObject *dict,
 674				       struct perf_sample *sample)
 675{
 676	struct mem_info mi = { .data_src.val = sample->data_src };
 677	char decode[100];
 678
 679	pydict_set_item_string_decref(dict, "datasrc",
 680			PyLong_FromUnsignedLongLong(sample->data_src));
 681
 682	perf_script__meminfo_scnprintf(decode, 100, &mi);
 683
 684	pydict_set_item_string_decref(dict, "datasrc_decode",
 685			_PyUnicode_FromString(decode));
 686}
 687
 688static int regs_map(struct regs_dump *regs, uint64_t mask, char *bf, int size)
 689{
 690	unsigned int i = 0, r;
 691	int printed = 0;
 692
 693	bf[0] = 0;
 694
 
 
 
 695	for_each_set_bit(r, (unsigned long *) &mask, sizeof(mask) * 8) {
 696		u64 val = regs->regs[i++];
 697
 698		printed += scnprintf(bf + printed, size - printed,
 699				     "%5s:0x%" PRIx64 " ",
 700				     perf_reg_name(r), val);
 701	}
 702
 703	return printed;
 704}
 705
 706static void set_regs_in_dict(PyObject *dict,
 707			     struct perf_sample *sample,
 708			     struct evsel *evsel)
 709{
 710	struct perf_event_attr *attr = &evsel->core.attr;
 711	char bf[512];
 712
 713	regs_map(&sample->intr_regs, attr->sample_regs_intr, bf, sizeof(bf));
 714
 715	pydict_set_item_string_decref(dict, "iregs",
 716			_PyUnicode_FromString(bf));
 717
 718	regs_map(&sample->user_regs, attr->sample_regs_user, bf, sizeof(bf));
 719
 720	pydict_set_item_string_decref(dict, "uregs",
 721			_PyUnicode_FromString(bf));
 722}
 723
 724static PyObject *get_perf_sample_dict(struct perf_sample *sample,
 725					 struct evsel *evsel,
 726					 struct addr_location *al,
 727					 PyObject *callchain)
 728{
 729	PyObject *dict, *dict_sample, *brstack, *brstacksym;
 730
 731	dict = PyDict_New();
 732	if (!dict)
 733		Py_FatalError("couldn't create Python dictionary");
 734
 735	dict_sample = PyDict_New();
 736	if (!dict_sample)
 737		Py_FatalError("couldn't create Python dictionary");
 738
 739	pydict_set_item_string_decref(dict, "ev_name", _PyUnicode_FromString(perf_evsel__name(evsel)));
 740	pydict_set_item_string_decref(dict, "attr", _PyBytes_FromStringAndSize((const char *)&evsel->core.attr, sizeof(evsel->core.attr)));
 741
 742	pydict_set_item_string_decref(dict_sample, "pid",
 743			_PyLong_FromLong(sample->pid));
 744	pydict_set_item_string_decref(dict_sample, "tid",
 745			_PyLong_FromLong(sample->tid));
 746	pydict_set_item_string_decref(dict_sample, "cpu",
 747			_PyLong_FromLong(sample->cpu));
 748	pydict_set_item_string_decref(dict_sample, "ip",
 749			PyLong_FromUnsignedLongLong(sample->ip));
 750	pydict_set_item_string_decref(dict_sample, "time",
 751			PyLong_FromUnsignedLongLong(sample->time));
 752	pydict_set_item_string_decref(dict_sample, "period",
 753			PyLong_FromUnsignedLongLong(sample->period));
 754	pydict_set_item_string_decref(dict_sample, "phys_addr",
 755			PyLong_FromUnsignedLongLong(sample->phys_addr));
 756	pydict_set_item_string_decref(dict_sample, "addr",
 757			PyLong_FromUnsignedLongLong(sample->addr));
 758	set_sample_read_in_dict(dict_sample, sample, evsel);
 759	pydict_set_item_string_decref(dict_sample, "weight",
 760			PyLong_FromUnsignedLongLong(sample->weight));
 761	pydict_set_item_string_decref(dict_sample, "transaction",
 762			PyLong_FromUnsignedLongLong(sample->transaction));
 763	set_sample_datasrc_in_dict(dict_sample, sample);
 764	pydict_set_item_string_decref(dict, "sample", dict_sample);
 765
 766	pydict_set_item_string_decref(dict, "raw_buf", _PyBytes_FromStringAndSize(
 767			(const char *)sample->raw_data, sample->raw_size));
 768	pydict_set_item_string_decref(dict, "comm",
 769			_PyUnicode_FromString(thread__comm_str(al->thread)));
 770	if (al->map) {
 771		pydict_set_item_string_decref(dict, "dso",
 772			_PyUnicode_FromString(al->map->dso->name));
 773	}
 774	if (al->sym) {
 775		pydict_set_item_string_decref(dict, "symbol",
 776			_PyUnicode_FromString(al->sym->name));
 777	}
 778
 779	pydict_set_item_string_decref(dict, "callchain", callchain);
 780
 781	brstack = python_process_brstack(sample, al->thread);
 782	pydict_set_item_string_decref(dict, "brstack", brstack);
 783
 784	brstacksym = python_process_brstacksym(sample, al->thread);
 785	pydict_set_item_string_decref(dict, "brstacksym", brstacksym);
 786
 787	set_regs_in_dict(dict, sample, evsel);
 788
 789	return dict;
 790}
 791
 792static void python_process_tracepoint(struct perf_sample *sample,
 793				      struct evsel *evsel,
 794				      struct addr_location *al)
 795{
 796	struct tep_event *event = evsel->tp_format;
 797	PyObject *handler, *context, *t, *obj = NULL, *callchain;
 798	PyObject *dict = NULL, *all_entries_dict = NULL;
 799	static char handler_name[256];
 800	struct tep_format_field *field;
 801	unsigned long s, ns;
 802	unsigned n = 0;
 803	int pid;
 804	int cpu = sample->cpu;
 805	void *data = sample->raw_data;
 806	unsigned long long nsecs = sample->time;
 807	const char *comm = thread__comm_str(al->thread);
 808	const char *default_handler_name = "trace_unhandled";
 809
 810	if (!event) {
 811		snprintf(handler_name, sizeof(handler_name),
 812			 "ug! no event found for type %" PRIu64, (u64)evsel->core.attr.config);
 813		Py_FatalError(handler_name);
 814	}
 815
 816	pid = raw_field_value(event, "common_pid", data);
 817
 818	sprintf(handler_name, "%s__%s", event->system, event->name);
 819
 820	if (!test_and_set_bit(event->id, events_defined))
 821		define_event_symbols(event, handler_name, event->print_fmt.args);
 822
 823	handler = get_handler(handler_name);
 824	if (!handler) {
 825		handler = get_handler(default_handler_name);
 826		if (!handler)
 827			return;
 828		dict = PyDict_New();
 829		if (!dict)
 830			Py_FatalError("couldn't create Python dict");
 831	}
 832
 833	t = PyTuple_New(MAX_FIELDS);
 834	if (!t)
 835		Py_FatalError("couldn't create Python tuple");
 836
 837
 838	s = nsecs / NSEC_PER_SEC;
 839	ns = nsecs - s * NSEC_PER_SEC;
 840
 841	scripting_context->event_data = data;
 842	scripting_context->pevent = evsel->tp_format->tep;
 843
 844	context = _PyCapsule_New(scripting_context, NULL, NULL);
 845
 846	PyTuple_SetItem(t, n++, _PyUnicode_FromString(handler_name));
 847	PyTuple_SetItem(t, n++, context);
 848
 849	/* ip unwinding */
 850	callchain = python_process_callchain(sample, evsel, al);
 851	/* Need an additional reference for the perf_sample dict */
 852	Py_INCREF(callchain);
 853
 854	if (!dict) {
 855		PyTuple_SetItem(t, n++, _PyLong_FromLong(cpu));
 856		PyTuple_SetItem(t, n++, _PyLong_FromLong(s));
 857		PyTuple_SetItem(t, n++, _PyLong_FromLong(ns));
 858		PyTuple_SetItem(t, n++, _PyLong_FromLong(pid));
 859		PyTuple_SetItem(t, n++, _PyUnicode_FromString(comm));
 860		PyTuple_SetItem(t, n++, callchain);
 861	} else {
 862		pydict_set_item_string_decref(dict, "common_cpu", _PyLong_FromLong(cpu));
 863		pydict_set_item_string_decref(dict, "common_s", _PyLong_FromLong(s));
 864		pydict_set_item_string_decref(dict, "common_ns", _PyLong_FromLong(ns));
 865		pydict_set_item_string_decref(dict, "common_pid", _PyLong_FromLong(pid));
 866		pydict_set_item_string_decref(dict, "common_comm", _PyUnicode_FromString(comm));
 867		pydict_set_item_string_decref(dict, "common_callchain", callchain);
 868	}
 869	for (field = event->format.fields; field; field = field->next) {
 870		unsigned int offset, len;
 871		unsigned long long val;
 872
 873		if (field->flags & TEP_FIELD_IS_ARRAY) {
 874			offset = field->offset;
 875			len    = field->size;
 876			if (field->flags & TEP_FIELD_IS_DYNAMIC) {
 877				val     = tep_read_number(scripting_context->pevent,
 878							  data + offset, len);
 879				offset  = val;
 880				len     = offset >> 16;
 881				offset &= 0xffff;
 882			}
 883			if (field->flags & TEP_FIELD_IS_STRING &&
 884			    is_printable_array(data + offset, len)) {
 885				obj = _PyUnicode_FromString((char *) data + offset);
 886			} else {
 887				obj = PyByteArray_FromStringAndSize((const char *) data + offset, len);
 888				field->flags &= ~TEP_FIELD_IS_STRING;
 889			}
 890		} else { /* FIELD_IS_NUMERIC */
 891			obj = get_field_numeric_entry(event, field, data);
 892		}
 893		if (!dict)
 894			PyTuple_SetItem(t, n++, obj);
 895		else
 896			pydict_set_item_string_decref(dict, field->name, obj);
 897
 898	}
 899
 900	if (dict)
 901		PyTuple_SetItem(t, n++, dict);
 902
 903	if (get_argument_count(handler) == (int) n + 1) {
 904		all_entries_dict = get_perf_sample_dict(sample, evsel, al,
 905			callchain);
 906		PyTuple_SetItem(t, n++,	all_entries_dict);
 907	} else {
 908		Py_DECREF(callchain);
 909	}
 910
 911	if (_PyTuple_Resize(&t, n) == -1)
 912		Py_FatalError("error resizing Python tuple");
 913
 914	if (!dict)
 915		call_object(handler, t, handler_name);
 916	else
 917		call_object(handler, t, default_handler_name);
 918
 919	Py_DECREF(t);
 920}
 921
 922static PyObject *tuple_new(unsigned int sz)
 923{
 924	PyObject *t;
 925
 926	t = PyTuple_New(sz);
 927	if (!t)
 928		Py_FatalError("couldn't create Python tuple");
 929	return t;
 930}
 931
 932static int tuple_set_u64(PyObject *t, unsigned int pos, u64 val)
 933{
 934#if BITS_PER_LONG == 64
 935	return PyTuple_SetItem(t, pos, _PyLong_FromLong(val));
 936#endif
 937#if BITS_PER_LONG == 32
 938	return PyTuple_SetItem(t, pos, PyLong_FromLongLong(val));
 939#endif
 940}
 941
 942static int tuple_set_s32(PyObject *t, unsigned int pos, s32 val)
 943{
 944	return PyTuple_SetItem(t, pos, _PyLong_FromLong(val));
 945}
 946
 947static int tuple_set_string(PyObject *t, unsigned int pos, const char *s)
 948{
 949	return PyTuple_SetItem(t, pos, _PyUnicode_FromString(s));
 950}
 951
 952static int tuple_set_bytes(PyObject *t, unsigned int pos, void *bytes,
 953			   unsigned int sz)
 954{
 955	return PyTuple_SetItem(t, pos, _PyBytes_FromStringAndSize(bytes, sz));
 956}
 957
 958static int python_export_evsel(struct db_export *dbe, struct evsel *evsel)
 959{
 960	struct tables *tables = container_of(dbe, struct tables, dbe);
 961	PyObject *t;
 962
 963	t = tuple_new(2);
 964
 965	tuple_set_u64(t, 0, evsel->db_id);
 966	tuple_set_string(t, 1, perf_evsel__name(evsel));
 967
 968	call_object(tables->evsel_handler, t, "evsel_table");
 969
 970	Py_DECREF(t);
 971
 972	return 0;
 973}
 974
 975static int python_export_machine(struct db_export *dbe,
 976				 struct machine *machine)
 977{
 978	struct tables *tables = container_of(dbe, struct tables, dbe);
 979	PyObject *t;
 980
 981	t = tuple_new(3);
 982
 983	tuple_set_u64(t, 0, machine->db_id);
 984	tuple_set_s32(t, 1, machine->pid);
 985	tuple_set_string(t, 2, machine->root_dir ? machine->root_dir : "");
 986
 987	call_object(tables->machine_handler, t, "machine_table");
 988
 989	Py_DECREF(t);
 990
 991	return 0;
 992}
 993
 994static int python_export_thread(struct db_export *dbe, struct thread *thread,
 995				u64 main_thread_db_id, struct machine *machine)
 996{
 997	struct tables *tables = container_of(dbe, struct tables, dbe);
 998	PyObject *t;
 999
1000	t = tuple_new(5);
1001
1002	tuple_set_u64(t, 0, thread->db_id);
1003	tuple_set_u64(t, 1, machine->db_id);
1004	tuple_set_u64(t, 2, main_thread_db_id);
1005	tuple_set_s32(t, 3, thread->pid_);
1006	tuple_set_s32(t, 4, thread->tid);
1007
1008	call_object(tables->thread_handler, t, "thread_table");
1009
1010	Py_DECREF(t);
1011
1012	return 0;
1013}
1014
1015static int python_export_comm(struct db_export *dbe, struct comm *comm,
1016			      struct thread *thread)
1017{
1018	struct tables *tables = container_of(dbe, struct tables, dbe);
1019	PyObject *t;
1020
1021	t = tuple_new(5);
1022
1023	tuple_set_u64(t, 0, comm->db_id);
1024	tuple_set_string(t, 1, comm__str(comm));
1025	tuple_set_u64(t, 2, thread->db_id);
1026	tuple_set_u64(t, 3, comm->start);
1027	tuple_set_s32(t, 4, comm->exec);
1028
1029	call_object(tables->comm_handler, t, "comm_table");
1030
1031	Py_DECREF(t);
1032
1033	return 0;
1034}
1035
1036static int python_export_comm_thread(struct db_export *dbe, u64 db_id,
1037				     struct comm *comm, struct thread *thread)
1038{
1039	struct tables *tables = container_of(dbe, struct tables, dbe);
1040	PyObject *t;
1041
1042	t = tuple_new(3);
1043
1044	tuple_set_u64(t, 0, db_id);
1045	tuple_set_u64(t, 1, comm->db_id);
1046	tuple_set_u64(t, 2, thread->db_id);
1047
1048	call_object(tables->comm_thread_handler, t, "comm_thread_table");
1049
1050	Py_DECREF(t);
1051
1052	return 0;
1053}
1054
1055static int python_export_dso(struct db_export *dbe, struct dso *dso,
1056			     struct machine *machine)
1057{
1058	struct tables *tables = container_of(dbe, struct tables, dbe);
1059	char sbuild_id[SBUILD_ID_SIZE];
1060	PyObject *t;
1061
1062	build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id);
1063
1064	t = tuple_new(5);
1065
1066	tuple_set_u64(t, 0, dso->db_id);
1067	tuple_set_u64(t, 1, machine->db_id);
1068	tuple_set_string(t, 2, dso->short_name);
1069	tuple_set_string(t, 3, dso->long_name);
1070	tuple_set_string(t, 4, sbuild_id);
1071
1072	call_object(tables->dso_handler, t, "dso_table");
1073
1074	Py_DECREF(t);
1075
1076	return 0;
1077}
1078
1079static int python_export_symbol(struct db_export *dbe, struct symbol *sym,
1080				struct dso *dso)
1081{
1082	struct tables *tables = container_of(dbe, struct tables, dbe);
1083	u64 *sym_db_id = symbol__priv(sym);
1084	PyObject *t;
1085
1086	t = tuple_new(6);
1087
1088	tuple_set_u64(t, 0, *sym_db_id);
1089	tuple_set_u64(t, 1, dso->db_id);
1090	tuple_set_u64(t, 2, sym->start);
1091	tuple_set_u64(t, 3, sym->end);
1092	tuple_set_s32(t, 4, sym->binding);
1093	tuple_set_string(t, 5, sym->name);
1094
1095	call_object(tables->symbol_handler, t, "symbol_table");
1096
1097	Py_DECREF(t);
1098
1099	return 0;
1100}
1101
1102static int python_export_branch_type(struct db_export *dbe, u32 branch_type,
1103				     const char *name)
1104{
1105	struct tables *tables = container_of(dbe, struct tables, dbe);
1106	PyObject *t;
1107
1108	t = tuple_new(2);
1109
1110	tuple_set_s32(t, 0, branch_type);
1111	tuple_set_string(t, 1, name);
1112
1113	call_object(tables->branch_type_handler, t, "branch_type_table");
1114
1115	Py_DECREF(t);
1116
1117	return 0;
1118}
1119
1120static void python_export_sample_table(struct db_export *dbe,
1121				       struct export_sample *es)
1122{
1123	struct tables *tables = container_of(dbe, struct tables, dbe);
1124	PyObject *t;
1125
1126	t = tuple_new(24);
1127
1128	tuple_set_u64(t, 0, es->db_id);
1129	tuple_set_u64(t, 1, es->evsel->db_id);
1130	tuple_set_u64(t, 2, es->al->machine->db_id);
1131	tuple_set_u64(t, 3, es->al->thread->db_id);
1132	tuple_set_u64(t, 4, es->comm_db_id);
1133	tuple_set_u64(t, 5, es->dso_db_id);
1134	tuple_set_u64(t, 6, es->sym_db_id);
1135	tuple_set_u64(t, 7, es->offset);
1136	tuple_set_u64(t, 8, es->sample->ip);
1137	tuple_set_u64(t, 9, es->sample->time);
1138	tuple_set_s32(t, 10, es->sample->cpu);
1139	tuple_set_u64(t, 11, es->addr_dso_db_id);
1140	tuple_set_u64(t, 12, es->addr_sym_db_id);
1141	tuple_set_u64(t, 13, es->addr_offset);
1142	tuple_set_u64(t, 14, es->sample->addr);
1143	tuple_set_u64(t, 15, es->sample->period);
1144	tuple_set_u64(t, 16, es->sample->weight);
1145	tuple_set_u64(t, 17, es->sample->transaction);
1146	tuple_set_u64(t, 18, es->sample->data_src);
1147	tuple_set_s32(t, 19, es->sample->flags & PERF_BRANCH_MASK);
1148	tuple_set_s32(t, 20, !!(es->sample->flags & PERF_IP_FLAG_IN_TX));
1149	tuple_set_u64(t, 21, es->call_path_id);
1150	tuple_set_u64(t, 22, es->sample->insn_cnt);
1151	tuple_set_u64(t, 23, es->sample->cyc_cnt);
1152
1153	call_object(tables->sample_handler, t, "sample_table");
1154
1155	Py_DECREF(t);
1156}
1157
1158static void python_export_synth(struct db_export *dbe, struct export_sample *es)
1159{
1160	struct tables *tables = container_of(dbe, struct tables, dbe);
1161	PyObject *t;
1162
1163	t = tuple_new(3);
1164
1165	tuple_set_u64(t, 0, es->db_id);
1166	tuple_set_u64(t, 1, es->evsel->core.attr.config);
1167	tuple_set_bytes(t, 2, es->sample->raw_data, es->sample->raw_size);
1168
1169	call_object(tables->synth_handler, t, "synth_data");
1170
1171	Py_DECREF(t);
1172}
1173
1174static int python_export_sample(struct db_export *dbe,
1175				struct export_sample *es)
1176{
1177	struct tables *tables = container_of(dbe, struct tables, dbe);
1178
1179	python_export_sample_table(dbe, es);
1180
1181	if (es->evsel->core.attr.type == PERF_TYPE_SYNTH && tables->synth_handler)
1182		python_export_synth(dbe, es);
1183
1184	return 0;
1185}
1186
1187static int python_export_call_path(struct db_export *dbe, struct call_path *cp)
1188{
1189	struct tables *tables = container_of(dbe, struct tables, dbe);
1190	PyObject *t;
1191	u64 parent_db_id, sym_db_id;
1192
1193	parent_db_id = cp->parent ? cp->parent->db_id : 0;
1194	sym_db_id = cp->sym ? *(u64 *)symbol__priv(cp->sym) : 0;
1195
1196	t = tuple_new(4);
1197
1198	tuple_set_u64(t, 0, cp->db_id);
1199	tuple_set_u64(t, 1, parent_db_id);
1200	tuple_set_u64(t, 2, sym_db_id);
1201	tuple_set_u64(t, 3, cp->ip);
1202
1203	call_object(tables->call_path_handler, t, "call_path_table");
1204
1205	Py_DECREF(t);
1206
1207	return 0;
1208}
1209
1210static int python_export_call_return(struct db_export *dbe,
1211				     struct call_return *cr)
1212{
1213	struct tables *tables = container_of(dbe, struct tables, dbe);
1214	u64 comm_db_id = cr->comm ? cr->comm->db_id : 0;
1215	PyObject *t;
1216
1217	t = tuple_new(14);
1218
1219	tuple_set_u64(t, 0, cr->db_id);
1220	tuple_set_u64(t, 1, cr->thread->db_id);
1221	tuple_set_u64(t, 2, comm_db_id);
1222	tuple_set_u64(t, 3, cr->cp->db_id);
1223	tuple_set_u64(t, 4, cr->call_time);
1224	tuple_set_u64(t, 5, cr->return_time);
1225	tuple_set_u64(t, 6, cr->branch_count);
1226	tuple_set_u64(t, 7, cr->call_ref);
1227	tuple_set_u64(t, 8, cr->return_ref);
1228	tuple_set_u64(t, 9, cr->cp->parent->db_id);
1229	tuple_set_s32(t, 10, cr->flags);
1230	tuple_set_u64(t, 11, cr->parent_db_id);
1231	tuple_set_u64(t, 12, cr->insn_count);
1232	tuple_set_u64(t, 13, cr->cyc_count);
1233
1234	call_object(tables->call_return_handler, t, "call_return_table");
1235
1236	Py_DECREF(t);
1237
1238	return 0;
1239}
1240
1241static int python_export_context_switch(struct db_export *dbe, u64 db_id,
1242					struct machine *machine,
1243					struct perf_sample *sample,
1244					u64 th_out_id, u64 comm_out_id,
1245					u64 th_in_id, u64 comm_in_id, int flags)
1246{
1247	struct tables *tables = container_of(dbe, struct tables, dbe);
1248	PyObject *t;
1249
1250	t = tuple_new(9);
1251
1252	tuple_set_u64(t, 0, db_id);
1253	tuple_set_u64(t, 1, machine->db_id);
1254	tuple_set_u64(t, 2, sample->time);
1255	tuple_set_s32(t, 3, sample->cpu);
1256	tuple_set_u64(t, 4, th_out_id);
1257	tuple_set_u64(t, 5, comm_out_id);
1258	tuple_set_u64(t, 6, th_in_id);
1259	tuple_set_u64(t, 7, comm_in_id);
1260	tuple_set_s32(t, 8, flags);
1261
1262	call_object(tables->context_switch_handler, t, "context_switch");
1263
1264	Py_DECREF(t);
1265
1266	return 0;
1267}
1268
1269static int python_process_call_return(struct call_return *cr, u64 *parent_db_id,
1270				      void *data)
1271{
1272	struct db_export *dbe = data;
1273
1274	return db_export__call_return(dbe, cr, parent_db_id);
1275}
1276
1277static void python_process_general_event(struct perf_sample *sample,
1278					 struct evsel *evsel,
1279					 struct addr_location *al)
1280{
1281	PyObject *handler, *t, *dict, *callchain;
1282	static char handler_name[64];
1283	unsigned n = 0;
1284
1285	snprintf(handler_name, sizeof(handler_name), "%s", "process_event");
1286
1287	handler = get_handler(handler_name);
1288	if (!handler)
1289		return;
1290
1291	/*
1292	 * Use the MAX_FIELDS to make the function expandable, though
1293	 * currently there is only one item for the tuple.
1294	 */
1295	t = PyTuple_New(MAX_FIELDS);
1296	if (!t)
1297		Py_FatalError("couldn't create Python tuple");
1298
1299	/* ip unwinding */
1300	callchain = python_process_callchain(sample, evsel, al);
1301	dict = get_perf_sample_dict(sample, evsel, al, callchain);
1302
1303	PyTuple_SetItem(t, n++, dict);
1304	if (_PyTuple_Resize(&t, n) == -1)
1305		Py_FatalError("error resizing Python tuple");
1306
1307	call_object(handler, t, handler_name);
1308
1309	Py_DECREF(t);
1310}
1311
1312static void python_process_event(union perf_event *event,
1313				 struct perf_sample *sample,
1314				 struct evsel *evsel,
1315				 struct addr_location *al)
1316{
1317	struct tables *tables = &tables_global;
1318
1319	switch (evsel->core.attr.type) {
1320	case PERF_TYPE_TRACEPOINT:
1321		python_process_tracepoint(sample, evsel, al);
1322		break;
1323	/* Reserve for future process_hw/sw/raw APIs */
1324	default:
1325		if (tables->db_export_mode)
1326			db_export__sample(&tables->dbe, event, sample, evsel, al);
1327		else
1328			python_process_general_event(sample, evsel, al);
1329	}
1330}
1331
1332static void python_process_switch(union perf_event *event,
1333				  struct perf_sample *sample,
1334				  struct machine *machine)
1335{
1336	struct tables *tables = &tables_global;
1337
1338	if (tables->db_export_mode)
1339		db_export__switch(&tables->dbe, event, sample, machine);
1340}
1341
1342static void get_handler_name(char *str, size_t size,
1343			     struct evsel *evsel)
1344{
1345	char *p = str;
1346
1347	scnprintf(str, size, "stat__%s", perf_evsel__name(evsel));
1348
1349	while ((p = strchr(p, ':'))) {
1350		*p = '_';
1351		p++;
1352	}
1353}
1354
1355static void
1356process_stat(struct evsel *counter, int cpu, int thread, u64 tstamp,
1357	     struct perf_counts_values *count)
1358{
1359	PyObject *handler, *t;
1360	static char handler_name[256];
1361	int n = 0;
1362
1363	t = PyTuple_New(MAX_FIELDS);
1364	if (!t)
1365		Py_FatalError("couldn't create Python tuple");
1366
1367	get_handler_name(handler_name, sizeof(handler_name),
1368			 counter);
1369
1370	handler = get_handler(handler_name);
1371	if (!handler) {
1372		pr_debug("can't find python handler %s\n", handler_name);
1373		return;
1374	}
1375
1376	PyTuple_SetItem(t, n++, _PyLong_FromLong(cpu));
1377	PyTuple_SetItem(t, n++, _PyLong_FromLong(thread));
1378
1379	tuple_set_u64(t, n++, tstamp);
1380	tuple_set_u64(t, n++, count->val);
1381	tuple_set_u64(t, n++, count->ena);
1382	tuple_set_u64(t, n++, count->run);
1383
1384	if (_PyTuple_Resize(&t, n) == -1)
1385		Py_FatalError("error resizing Python tuple");
1386
1387	call_object(handler, t, handler_name);
1388
1389	Py_DECREF(t);
1390}
1391
1392static void python_process_stat(struct perf_stat_config *config,
1393				struct evsel *counter, u64 tstamp)
1394{
1395	struct perf_thread_map *threads = counter->core.threads;
1396	struct perf_cpu_map *cpus = counter->core.cpus;
1397	int cpu, thread;
1398
1399	if (config->aggr_mode == AGGR_GLOBAL) {
1400		process_stat(counter, -1, -1, tstamp,
1401			     &counter->counts->aggr);
1402		return;
1403	}
1404
1405	for (thread = 0; thread < threads->nr; thread++) {
1406		for (cpu = 0; cpu < cpus->nr; cpu++) {
1407			process_stat(counter, cpus->map[cpu],
1408				     perf_thread_map__pid(threads, thread), tstamp,
1409				     perf_counts(counter->counts, cpu, thread));
1410		}
1411	}
1412}
1413
1414static void python_process_stat_interval(u64 tstamp)
1415{
1416	PyObject *handler, *t;
1417	static const char handler_name[] = "stat__interval";
1418	int n = 0;
1419
1420	t = PyTuple_New(MAX_FIELDS);
1421	if (!t)
1422		Py_FatalError("couldn't create Python tuple");
1423
1424	handler = get_handler(handler_name);
1425	if (!handler) {
1426		pr_debug("can't find python handler %s\n", handler_name);
1427		return;
1428	}
1429
1430	tuple_set_u64(t, n++, tstamp);
1431
1432	if (_PyTuple_Resize(&t, n) == -1)
1433		Py_FatalError("error resizing Python tuple");
1434
1435	call_object(handler, t, handler_name);
1436
1437	Py_DECREF(t);
1438}
1439
1440static int run_start_sub(void)
1441{
1442	main_module = PyImport_AddModule("__main__");
1443	if (main_module == NULL)
1444		return -1;
1445	Py_INCREF(main_module);
1446
1447	main_dict = PyModule_GetDict(main_module);
1448	if (main_dict == NULL)
1449		goto error;
1450	Py_INCREF(main_dict);
1451
1452	try_call_object("trace_begin", NULL);
1453
1454	return 0;
1455
1456error:
1457	Py_XDECREF(main_dict);
1458	Py_XDECREF(main_module);
1459	return -1;
1460}
1461
1462#define SET_TABLE_HANDLER_(name, handler_name, table_name) do {		\
1463	tables->handler_name = get_handler(#table_name);		\
1464	if (tables->handler_name)					\
1465		tables->dbe.export_ ## name = python_export_ ## name;	\
1466} while (0)
1467
1468#define SET_TABLE_HANDLER(name) \
1469	SET_TABLE_HANDLER_(name, name ## _handler, name ## _table)
1470
1471static void set_table_handlers(struct tables *tables)
1472{
1473	const char *perf_db_export_mode = "perf_db_export_mode";
1474	const char *perf_db_export_calls = "perf_db_export_calls";
1475	const char *perf_db_export_callchains = "perf_db_export_callchains";
1476	PyObject *db_export_mode, *db_export_calls, *db_export_callchains;
1477	bool export_calls = false;
1478	bool export_callchains = false;
1479	int ret;
1480
1481	memset(tables, 0, sizeof(struct tables));
1482	if (db_export__init(&tables->dbe))
1483		Py_FatalError("failed to initialize export");
1484
1485	db_export_mode = PyDict_GetItemString(main_dict, perf_db_export_mode);
1486	if (!db_export_mode)
1487		return;
1488
1489	ret = PyObject_IsTrue(db_export_mode);
1490	if (ret == -1)
1491		handler_call_die(perf_db_export_mode);
1492	if (!ret)
1493		return;
1494
1495	/* handle export calls */
1496	tables->dbe.crp = NULL;
1497	db_export_calls = PyDict_GetItemString(main_dict, perf_db_export_calls);
1498	if (db_export_calls) {
1499		ret = PyObject_IsTrue(db_export_calls);
1500		if (ret == -1)
1501			handler_call_die(perf_db_export_calls);
1502		export_calls = !!ret;
1503	}
1504
1505	if (export_calls) {
1506		tables->dbe.crp =
1507			call_return_processor__new(python_process_call_return,
1508						   &tables->dbe);
1509		if (!tables->dbe.crp)
1510			Py_FatalError("failed to create calls processor");
1511	}
1512
1513	/* handle export callchains */
1514	tables->dbe.cpr = NULL;
1515	db_export_callchains = PyDict_GetItemString(main_dict,
1516						    perf_db_export_callchains);
1517	if (db_export_callchains) {
1518		ret = PyObject_IsTrue(db_export_callchains);
1519		if (ret == -1)
1520			handler_call_die(perf_db_export_callchains);
1521		export_callchains = !!ret;
1522	}
1523
1524	if (export_callchains) {
1525		/*
1526		 * Attempt to use the call path root from the call return
1527		 * processor, if the call return processor is in use. Otherwise,
1528		 * we allocate a new call path root. This prevents exporting
1529		 * duplicate call path ids when both are in use simultaniously.
1530		 */
1531		if (tables->dbe.crp)
1532			tables->dbe.cpr = tables->dbe.crp->cpr;
1533		else
1534			tables->dbe.cpr = call_path_root__new();
1535
1536		if (!tables->dbe.cpr)
1537			Py_FatalError("failed to create call path root");
1538	}
1539
1540	tables->db_export_mode = true;
1541	/*
1542	 * Reserve per symbol space for symbol->db_id via symbol__priv()
1543	 */
1544	symbol_conf.priv_size = sizeof(u64);
1545
1546	SET_TABLE_HANDLER(evsel);
1547	SET_TABLE_HANDLER(machine);
1548	SET_TABLE_HANDLER(thread);
1549	SET_TABLE_HANDLER(comm);
1550	SET_TABLE_HANDLER(comm_thread);
1551	SET_TABLE_HANDLER(dso);
1552	SET_TABLE_HANDLER(symbol);
1553	SET_TABLE_HANDLER(branch_type);
1554	SET_TABLE_HANDLER(sample);
1555	SET_TABLE_HANDLER(call_path);
1556	SET_TABLE_HANDLER(call_return);
1557	SET_TABLE_HANDLER(context_switch);
1558
1559	/*
1560	 * Synthesized events are samples but with architecture-specific data
1561	 * stored in sample->raw_data. They are exported via
1562	 * python_export_sample() and consequently do not need a separate export
1563	 * callback.
1564	 */
1565	tables->synth_handler = get_handler("synth_data");
1566}
1567
1568#if PY_MAJOR_VERSION < 3
1569static void _free_command_line(const char **command_line, int num)
1570{
1571	free(command_line);
1572}
1573#else
1574static void _free_command_line(wchar_t **command_line, int num)
1575{
1576	int i;
1577	for (i = 0; i < num; i++)
1578		PyMem_RawFree(command_line[i]);
1579	free(command_line);
1580}
1581#endif
1582
1583
1584/*
1585 * Start trace script
1586 */
1587static int python_start_script(const char *script, int argc, const char **argv)
1588{
1589	struct tables *tables = &tables_global;
1590	PyMODINIT_FUNC (*initfunc)(void);
1591#if PY_MAJOR_VERSION < 3
1592	const char **command_line;
1593#else
1594	wchar_t **command_line;
1595#endif
1596	/*
1597	 * Use a non-const name variable to cope with python 2.6's
1598	 * PyImport_AppendInittab prototype
1599	 */
1600	char buf[PATH_MAX], name[19] = "perf_trace_context";
1601	int i, err = 0;
1602	FILE *fp;
1603
1604#if PY_MAJOR_VERSION < 3
1605	initfunc = initperf_trace_context;
1606	command_line = malloc((argc + 1) * sizeof(const char *));
1607	command_line[0] = script;
1608	for (i = 1; i < argc + 1; i++)
1609		command_line[i] = argv[i - 1];
1610#else
1611	initfunc = PyInit_perf_trace_context;
1612	command_line = malloc((argc + 1) * sizeof(wchar_t *));
1613	command_line[0] = Py_DecodeLocale(script, NULL);
1614	for (i = 1; i < argc + 1; i++)
1615		command_line[i] = Py_DecodeLocale(argv[i - 1], NULL);
1616#endif
1617
1618	PyImport_AppendInittab(name, initfunc);
1619	Py_Initialize();
1620
1621#if PY_MAJOR_VERSION < 3
1622	PySys_SetArgv(argc + 1, (char **)command_line);
1623#else
1624	PySys_SetArgv(argc + 1, command_line);
1625#endif
1626
1627	fp = fopen(script, "r");
1628	if (!fp) {
1629		sprintf(buf, "Can't open python script \"%s\"", script);
1630		perror(buf);
1631		err = -1;
1632		goto error;
1633	}
1634
1635	err = PyRun_SimpleFile(fp, script);
1636	if (err) {
1637		fprintf(stderr, "Error running python script %s\n", script);
1638		goto error;
1639	}
1640
1641	err = run_start_sub();
1642	if (err) {
1643		fprintf(stderr, "Error starting python script %s\n", script);
1644		goto error;
1645	}
1646
1647	set_table_handlers(tables);
1648
1649	if (tables->db_export_mode) {
1650		err = db_export__branch_types(&tables->dbe);
1651		if (err)
1652			goto error;
1653	}
1654
1655	_free_command_line(command_line, argc + 1);
1656
1657	return err;
1658error:
1659	Py_Finalize();
1660	_free_command_line(command_line, argc + 1);
1661
1662	return err;
1663}
1664
1665static int python_flush_script(void)
1666{
1667	return 0;
1668}
1669
1670/*
1671 * Stop trace script
1672 */
1673static int python_stop_script(void)
1674{
1675	struct tables *tables = &tables_global;
1676
1677	try_call_object("trace_end", NULL);
1678
1679	db_export__exit(&tables->dbe);
1680
1681	Py_XDECREF(main_dict);
1682	Py_XDECREF(main_module);
1683	Py_Finalize();
1684
1685	return 0;
1686}
1687
1688static int python_generate_script(struct tep_handle *pevent, const char *outfile)
1689{
1690	int i, not_first, count, nr_events;
1691	struct tep_event **all_events;
1692	struct tep_event *event = NULL;
1693	struct tep_format_field *f;
1694	char fname[PATH_MAX];
1695	FILE *ofp;
1696
1697	sprintf(fname, "%s.py", outfile);
1698	ofp = fopen(fname, "w");
1699	if (ofp == NULL) {
1700		fprintf(stderr, "couldn't open %s\n", fname);
1701		return -1;
1702	}
1703	fprintf(ofp, "# perf script event handlers, "
1704		"generated by perf script -g python\n");
1705
1706	fprintf(ofp, "# Licensed under the terms of the GNU GPL"
1707		" License version 2\n\n");
1708
1709	fprintf(ofp, "# The common_* event handler fields are the most useful "
1710		"fields common to\n");
1711
1712	fprintf(ofp, "# all events.  They don't necessarily correspond to "
1713		"the 'common_*' fields\n");
1714
1715	fprintf(ofp, "# in the format files.  Those fields not available as "
1716		"handler params can\n");
1717
1718	fprintf(ofp, "# be retrieved using Python functions of the form "
1719		"common_*(context).\n");
1720
1721	fprintf(ofp, "# See the perf-script-python Documentation for the list "
1722		"of available functions.\n\n");
1723
1724	fprintf(ofp, "from __future__ import print_function\n\n");
1725	fprintf(ofp, "import os\n");
1726	fprintf(ofp, "import sys\n\n");
1727
1728	fprintf(ofp, "sys.path.append(os.environ['PERF_EXEC_PATH'] + \\\n");
1729	fprintf(ofp, "\t'/scripts/python/Perf-Trace-Util/lib/Perf/Trace')\n");
1730	fprintf(ofp, "\nfrom perf_trace_context import *\n");
1731	fprintf(ofp, "from Core import *\n\n\n");
1732
1733	fprintf(ofp, "def trace_begin():\n");
1734	fprintf(ofp, "\tprint(\"in trace_begin\")\n\n");
1735
1736	fprintf(ofp, "def trace_end():\n");
1737	fprintf(ofp, "\tprint(\"in trace_end\")\n\n");
1738
1739	nr_events = tep_get_events_count(pevent);
1740	all_events = tep_list_events(pevent, TEP_EVENT_SORT_ID);
1741
1742	for (i = 0; all_events && i < nr_events; i++) {
1743		event = all_events[i];
1744		fprintf(ofp, "def %s__%s(", event->system, event->name);
1745		fprintf(ofp, "event_name, ");
1746		fprintf(ofp, "context, ");
1747		fprintf(ofp, "common_cpu,\n");
1748		fprintf(ofp, "\tcommon_secs, ");
1749		fprintf(ofp, "common_nsecs, ");
1750		fprintf(ofp, "common_pid, ");
1751		fprintf(ofp, "common_comm,\n\t");
1752		fprintf(ofp, "common_callchain, ");
1753
1754		not_first = 0;
1755		count = 0;
1756
1757		for (f = event->format.fields; f; f = f->next) {
1758			if (not_first++)
1759				fprintf(ofp, ", ");
1760			if (++count % 5 == 0)
1761				fprintf(ofp, "\n\t");
1762
1763			fprintf(ofp, "%s", f->name);
1764		}
1765		if (not_first++)
1766			fprintf(ofp, ", ");
1767		if (++count % 5 == 0)
1768			fprintf(ofp, "\n\t\t");
1769		fprintf(ofp, "perf_sample_dict");
1770
1771		fprintf(ofp, "):\n");
1772
1773		fprintf(ofp, "\t\tprint_header(event_name, common_cpu, "
1774			"common_secs, common_nsecs,\n\t\t\t"
1775			"common_pid, common_comm)\n\n");
1776
1777		fprintf(ofp, "\t\tprint(\"");
1778
1779		not_first = 0;
1780		count = 0;
1781
1782		for (f = event->format.fields; f; f = f->next) {
1783			if (not_first++)
1784				fprintf(ofp, ", ");
1785			if (count && count % 3 == 0) {
1786				fprintf(ofp, "\" \\\n\t\t\"");
1787			}
1788			count++;
1789
1790			fprintf(ofp, "%s=", f->name);
1791			if (f->flags & TEP_FIELD_IS_STRING ||
1792			    f->flags & TEP_FIELD_IS_FLAG ||
1793			    f->flags & TEP_FIELD_IS_ARRAY ||
1794			    f->flags & TEP_FIELD_IS_SYMBOLIC)
1795				fprintf(ofp, "%%s");
1796			else if (f->flags & TEP_FIELD_IS_SIGNED)
1797				fprintf(ofp, "%%d");
1798			else
1799				fprintf(ofp, "%%u");
1800		}
1801
1802		fprintf(ofp, "\" %% \\\n\t\t(");
1803
1804		not_first = 0;
1805		count = 0;
1806
1807		for (f = event->format.fields; f; f = f->next) {
1808			if (not_first++)
1809				fprintf(ofp, ", ");
1810
1811			if (++count % 5 == 0)
1812				fprintf(ofp, "\n\t\t");
1813
1814			if (f->flags & TEP_FIELD_IS_FLAG) {
1815				if ((count - 1) % 5 != 0) {
1816					fprintf(ofp, "\n\t\t");
1817					count = 4;
1818				}
1819				fprintf(ofp, "flag_str(\"");
1820				fprintf(ofp, "%s__%s\", ", event->system,
1821					event->name);
1822				fprintf(ofp, "\"%s\", %s)", f->name,
1823					f->name);
1824			} else if (f->flags & TEP_FIELD_IS_SYMBOLIC) {
1825				if ((count - 1) % 5 != 0) {
1826					fprintf(ofp, "\n\t\t");
1827					count = 4;
1828				}
1829				fprintf(ofp, "symbol_str(\"");
1830				fprintf(ofp, "%s__%s\", ", event->system,
1831					event->name);
1832				fprintf(ofp, "\"%s\", %s)", f->name,
1833					f->name);
1834			} else
1835				fprintf(ofp, "%s", f->name);
1836		}
1837
1838		fprintf(ofp, "))\n\n");
1839
1840		fprintf(ofp, "\t\tprint('Sample: {'+"
1841			"get_dict_as_string(perf_sample_dict['sample'], ', ')+'}')\n\n");
1842
1843		fprintf(ofp, "\t\tfor node in common_callchain:");
1844		fprintf(ofp, "\n\t\t\tif 'sym' in node:");
1845		fprintf(ofp, "\n\t\t\t\tprint(\"\\t[%%x] %%s\" %% (node['ip'], node['sym']['name']))");
1846		fprintf(ofp, "\n\t\t\telse:");
1847		fprintf(ofp, "\n\t\t\t\tprint(\"\t[%%x]\" %% (node['ip']))\n\n");
1848		fprintf(ofp, "\t\tprint()\n\n");
1849
1850	}
1851
1852	fprintf(ofp, "def trace_unhandled(event_name, context, "
1853		"event_fields_dict, perf_sample_dict):\n");
1854
1855	fprintf(ofp, "\t\tprint(get_dict_as_string(event_fields_dict))\n");
1856	fprintf(ofp, "\t\tprint('Sample: {'+"
1857		"get_dict_as_string(perf_sample_dict['sample'], ', ')+'}')\n\n");
1858
1859	fprintf(ofp, "def print_header("
1860		"event_name, cpu, secs, nsecs, pid, comm):\n"
1861		"\tprint(\"%%-20s %%5u %%05u.%%09u %%8u %%-20s \" %% \\\n\t"
1862		"(event_name, cpu, secs, nsecs, pid, comm), end=\"\")\n\n");
1863
1864	fprintf(ofp, "def get_dict_as_string(a_dict, delimiter=' '):\n"
1865		"\treturn delimiter.join"
1866		"(['%%s=%%s'%%(k,str(v))for k,v in sorted(a_dict.items())])\n");
1867
1868	fclose(ofp);
1869
1870	fprintf(stderr, "generated Python script: %s\n", fname);
1871
1872	return 0;
1873}
1874
1875struct scripting_ops python_scripting_ops = {
1876	.name			= "Python",
1877	.start_script		= python_start_script,
1878	.flush_script		= python_flush_script,
1879	.stop_script		= python_stop_script,
1880	.process_event		= python_process_event,
1881	.process_switch		= python_process_switch,
1882	.process_stat		= python_process_stat,
1883	.process_stat_interval	= python_process_stat_interval,
1884	.generate_script	= python_generate_script,
1885};