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trace-event-python.c
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trace-event-python.c
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/*
* trace-event-python. Feed trace events to an embedded Python interpreter.
*
* Copyright (C) 2010 Tom Zanussi <tzanussi@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <Python.h>
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <errno.h>
#include <linux/bitmap.h>
#include <linux/compiler.h>
#include <linux/time64.h>
#include "../build-id.h"
#include "../counts.h"
#include "../debug.h"
#include "../dso.h"
#include "../callchain.h"
#include "../evsel.h"
#include "../event.h"
#include "../thread.h"
#include "../comm.h"
#include "../machine.h"
#include "../db-export.h"
#include "../thread-stack.h"
#include "../trace-event.h"
#include "../call-path.h"
#include "map.h"
#include "symbol.h"
#include "thread_map.h"
#include "print_binary.h"
#include "stat.h"
#include "mem-events.h"
#if PY_MAJOR_VERSION < 3
#define _PyUnicode_FromString(arg) \
PyString_FromString(arg)
#define _PyUnicode_FromStringAndSize(arg1, arg2) \
PyString_FromStringAndSize((arg1), (arg2))
#define _PyBytes_FromStringAndSize(arg1, arg2) \
PyString_FromStringAndSize((arg1), (arg2))
#define _PyLong_FromLong(arg) \
PyInt_FromLong(arg)
#define _PyLong_AsLong(arg) \
PyInt_AsLong(arg)
#define _PyCapsule_New(arg1, arg2, arg3) \
PyCObject_FromVoidPtr((arg1), (arg2))
PyMODINIT_FUNC initperf_trace_context(void);
#else
#define _PyUnicode_FromString(arg) \
PyUnicode_FromString(arg)
#define _PyUnicode_FromStringAndSize(arg1, arg2) \
PyUnicode_FromStringAndSize((arg1), (arg2))
#define _PyBytes_FromStringAndSize(arg1, arg2) \
PyBytes_FromStringAndSize((arg1), (arg2))
#define _PyLong_FromLong(arg) \
PyLong_FromLong(arg)
#define _PyLong_AsLong(arg) \
PyLong_AsLong(arg)
#define _PyCapsule_New(arg1, arg2, arg3) \
PyCapsule_New((arg1), (arg2), (arg3))
PyMODINIT_FUNC PyInit_perf_trace_context(void);
#endif
#define TRACE_EVENT_TYPE_MAX \
((1 << (sizeof(unsigned short) * 8)) - 1)
static DECLARE_BITMAP(events_defined, TRACE_EVENT_TYPE_MAX);
#define MAX_FIELDS 64
#define N_COMMON_FIELDS 7
extern struct scripting_context *scripting_context;
static char *cur_field_name;
static int zero_flag_atom;
static PyObject *main_module, *main_dict;
struct tables {
struct db_export dbe;
PyObject *evsel_handler;
PyObject *machine_handler;
PyObject *thread_handler;
PyObject *comm_handler;
PyObject *comm_thread_handler;
PyObject *dso_handler;
PyObject *symbol_handler;
PyObject *branch_type_handler;
PyObject *sample_handler;
PyObject *call_path_handler;
PyObject *call_return_handler;
PyObject *synth_handler;
PyObject *context_switch_handler;
bool db_export_mode;
};
static struct tables tables_global;
static void handler_call_die(const char *handler_name) __noreturn;
static void handler_call_die(const char *handler_name)
{
PyErr_Print();
Py_FatalError("problem in Python trace event handler");
// Py_FatalError does not return
// but we have to make the compiler happy
abort();
}
/*
* Insert val into into the dictionary and decrement the reference counter.
* This is necessary for dictionaries since PyDict_SetItemString() does not
* steal a reference, as opposed to PyTuple_SetItem().
*/
static void pydict_set_item_string_decref(PyObject *dict, const char *key, PyObject *val)
{
PyDict_SetItemString(dict, key, val);
Py_DECREF(val);
}
static PyObject *get_handler(const char *handler_name)
{
PyObject *handler;
handler = PyDict_GetItemString(main_dict, handler_name);
if (handler && !PyCallable_Check(handler))
return NULL;
return handler;
}
static int get_argument_count(PyObject *handler)
{
int arg_count = 0;
/*
* The attribute for the code object is func_code in Python 2,
* whereas it is __code__ in Python 3.0+.
*/
PyObject *code_obj = PyObject_GetAttrString(handler,
"func_code");
if (PyErr_Occurred()) {
PyErr_Clear();
code_obj = PyObject_GetAttrString(handler,
"__code__");
}
PyErr_Clear();
if (code_obj) {
PyObject *arg_count_obj = PyObject_GetAttrString(code_obj,
"co_argcount");
if (arg_count_obj) {
arg_count = (int) _PyLong_AsLong(arg_count_obj);
Py_DECREF(arg_count_obj);
}
Py_DECREF(code_obj);
}
return arg_count;
}
static void call_object(PyObject *handler, PyObject *args, const char *die_msg)
{
PyObject *retval;
retval = PyObject_CallObject(handler, args);
if (retval == NULL)
handler_call_die(die_msg);
Py_DECREF(retval);
}
static void try_call_object(const char *handler_name, PyObject *args)
{
PyObject *handler;
handler = get_handler(handler_name);
if (handler)
call_object(handler, args, handler_name);
}
static void define_value(enum tep_print_arg_type field_type,
const char *ev_name,
const char *field_name,
const char *field_value,
const char *field_str)
{
const char *handler_name = "define_flag_value";
PyObject *t;
unsigned long long value;
unsigned n = 0;
if (field_type == TEP_PRINT_SYMBOL)
handler_name = "define_symbolic_value";
t = PyTuple_New(4);
if (!t)
Py_FatalError("couldn't create Python tuple");
value = eval_flag(field_value);
PyTuple_SetItem(t, n++, _PyUnicode_FromString(ev_name));
PyTuple_SetItem(t, n++, _PyUnicode_FromString(field_name));
PyTuple_SetItem(t, n++, _PyLong_FromLong(value));
PyTuple_SetItem(t, n++, _PyUnicode_FromString(field_str));
try_call_object(handler_name, t);
Py_DECREF(t);
}
static void define_values(enum tep_print_arg_type field_type,
struct tep_print_flag_sym *field,
const char *ev_name,
const char *field_name)
{
define_value(field_type, ev_name, field_name, field->value,
field->str);
if (field->next)
define_values(field_type, field->next, ev_name, field_name);
}
static void define_field(enum tep_print_arg_type field_type,
const char *ev_name,
const char *field_name,
const char *delim)
{
const char *handler_name = "define_flag_field";
PyObject *t;
unsigned n = 0;
if (field_type == TEP_PRINT_SYMBOL)
handler_name = "define_symbolic_field";
if (field_type == TEP_PRINT_FLAGS)
t = PyTuple_New(3);
else
t = PyTuple_New(2);
if (!t)
Py_FatalError("couldn't create Python tuple");
PyTuple_SetItem(t, n++, _PyUnicode_FromString(ev_name));
PyTuple_SetItem(t, n++, _PyUnicode_FromString(field_name));
if (field_type == TEP_PRINT_FLAGS)
PyTuple_SetItem(t, n++, _PyUnicode_FromString(delim));
try_call_object(handler_name, t);
Py_DECREF(t);
}
static void define_event_symbols(struct tep_event *event,
const char *ev_name,
struct tep_print_arg *args)
{
if (args == NULL)
return;
switch (args->type) {
case TEP_PRINT_NULL:
break;
case TEP_PRINT_ATOM:
define_value(TEP_PRINT_FLAGS, ev_name, cur_field_name, "0",
args->atom.atom);
zero_flag_atom = 0;
break;
case TEP_PRINT_FIELD:
free(cur_field_name);
cur_field_name = strdup(args->field.name);
break;
case TEP_PRINT_FLAGS:
define_event_symbols(event, ev_name, args->flags.field);
define_field(TEP_PRINT_FLAGS, ev_name, cur_field_name,
args->flags.delim);
define_values(TEP_PRINT_FLAGS, args->flags.flags, ev_name,
cur_field_name);
break;
case TEP_PRINT_SYMBOL:
define_event_symbols(event, ev_name, args->symbol.field);
define_field(TEP_PRINT_SYMBOL, ev_name, cur_field_name, NULL);
define_values(TEP_PRINT_SYMBOL, args->symbol.symbols, ev_name,
cur_field_name);
break;
case TEP_PRINT_HEX:
case TEP_PRINT_HEX_STR:
define_event_symbols(event, ev_name, args->hex.field);
define_event_symbols(event, ev_name, args->hex.size);
break;
case TEP_PRINT_INT_ARRAY:
define_event_symbols(event, ev_name, args->int_array.field);
define_event_symbols(event, ev_name, args->int_array.count);
define_event_symbols(event, ev_name, args->int_array.el_size);
break;
case TEP_PRINT_STRING:
break;
case TEP_PRINT_TYPE:
define_event_symbols(event, ev_name, args->typecast.item);
break;
case TEP_PRINT_OP:
if (strcmp(args->op.op, ":") == 0)
zero_flag_atom = 1;
define_event_symbols(event, ev_name, args->op.left);
define_event_symbols(event, ev_name, args->op.right);
break;
default:
/* gcc warns for these? */
case TEP_PRINT_BSTRING:
case TEP_PRINT_DYNAMIC_ARRAY:
case TEP_PRINT_DYNAMIC_ARRAY_LEN:
case TEP_PRINT_FUNC:
case TEP_PRINT_BITMASK:
/* we should warn... */
return;
}
if (args->next)
define_event_symbols(event, ev_name, args->next);
}
static PyObject *get_field_numeric_entry(struct tep_event *event,
struct tep_format_field *field, void *data)
{
bool is_array = field->flags & TEP_FIELD_IS_ARRAY;
PyObject *obj = NULL, *list = NULL;
unsigned long long val;
unsigned int item_size, n_items, i;
if (is_array) {
list = PyList_New(field->arraylen);
item_size = field->size / field->arraylen;
n_items = field->arraylen;
} else {
item_size = field->size;
n_items = 1;
}
for (i = 0; i < n_items; i++) {
val = read_size(event, data + field->offset + i * item_size,
item_size);
if (field->flags & TEP_FIELD_IS_SIGNED) {
if ((long long)val >= LONG_MIN &&
(long long)val <= LONG_MAX)
obj = _PyLong_FromLong(val);
else
obj = PyLong_FromLongLong(val);
} else {
if (val <= LONG_MAX)
obj = _PyLong_FromLong(val);
else
obj = PyLong_FromUnsignedLongLong(val);
}
if (is_array)
PyList_SET_ITEM(list, i, obj);
}
if (is_array)
obj = list;
return obj;
}
static const char *get_dsoname(struct map *map)
{
const char *dsoname = "[unknown]";
if (map && map->dso) {
if (symbol_conf.show_kernel_path && map->dso->long_name)
dsoname = map->dso->long_name;
else
dsoname = map->dso->name;
}
return dsoname;
}
static PyObject *python_process_callchain(struct perf_sample *sample,
struct evsel *evsel,
struct addr_location *al)
{
PyObject *pylist;
pylist = PyList_New(0);
if (!pylist)
Py_FatalError("couldn't create Python list");
if (!symbol_conf.use_callchain || !sample->callchain)
goto exit;
if (thread__resolve_callchain(al->thread, &callchain_cursor, evsel,
sample, NULL, NULL,
scripting_max_stack) != 0) {
pr_err("Failed to resolve callchain. Skipping\n");
goto exit;
}
callchain_cursor_commit(&callchain_cursor);
while (1) {
PyObject *pyelem;
struct callchain_cursor_node *node;
node = callchain_cursor_current(&callchain_cursor);
if (!node)
break;
pyelem = PyDict_New();
if (!pyelem)
Py_FatalError("couldn't create Python dictionary");
pydict_set_item_string_decref(pyelem, "ip",
PyLong_FromUnsignedLongLong(node->ip));
if (node->ms.sym) {
PyObject *pysym = PyDict_New();
if (!pysym)
Py_FatalError("couldn't create Python dictionary");
pydict_set_item_string_decref(pysym, "start",
PyLong_FromUnsignedLongLong(node->ms.sym->start));
pydict_set_item_string_decref(pysym, "end",
PyLong_FromUnsignedLongLong(node->ms.sym->end));
pydict_set_item_string_decref(pysym, "binding",
_PyLong_FromLong(node->ms.sym->binding));
pydict_set_item_string_decref(pysym, "name",
_PyUnicode_FromStringAndSize(node->ms.sym->name,
node->ms.sym->namelen));
pydict_set_item_string_decref(pyelem, "sym", pysym);
}
if (node->ms.map) {
const char *dsoname = get_dsoname(node->ms.map);
pydict_set_item_string_decref(pyelem, "dso",
_PyUnicode_FromString(dsoname));
}
callchain_cursor_advance(&callchain_cursor);
PyList_Append(pylist, pyelem);
Py_DECREF(pyelem);
}
exit:
return pylist;
}
static PyObject *python_process_brstack(struct perf_sample *sample,
struct thread *thread)
{
struct branch_stack *br = sample->branch_stack;
struct branch_entry *entries = perf_sample__branch_entries(sample);
PyObject *pylist;
u64 i;
pylist = PyList_New(0);
if (!pylist)
Py_FatalError("couldn't create Python list");
if (!(br && br->nr))
goto exit;
for (i = 0; i < br->nr; i++) {
PyObject *pyelem;
struct addr_location al;
const char *dsoname;
pyelem = PyDict_New();
if (!pyelem)
Py_FatalError("couldn't create Python dictionary");
pydict_set_item_string_decref(pyelem, "from",
PyLong_FromUnsignedLongLong(entries[i].from));
pydict_set_item_string_decref(pyelem, "to",
PyLong_FromUnsignedLongLong(entries[i].to));
pydict_set_item_string_decref(pyelem, "mispred",
PyBool_FromLong(entries[i].flags.mispred));
pydict_set_item_string_decref(pyelem, "predicted",
PyBool_FromLong(entries[i].flags.predicted));
pydict_set_item_string_decref(pyelem, "in_tx",
PyBool_FromLong(entries[i].flags.in_tx));
pydict_set_item_string_decref(pyelem, "abort",
PyBool_FromLong(entries[i].flags.abort));
pydict_set_item_string_decref(pyelem, "cycles",
PyLong_FromUnsignedLongLong(entries[i].flags.cycles));
thread__find_map_fb(thread, sample->cpumode,
entries[i].from, &al);
dsoname = get_dsoname(al.map);
pydict_set_item_string_decref(pyelem, "from_dsoname",
_PyUnicode_FromString(dsoname));
thread__find_map_fb(thread, sample->cpumode,
entries[i].to, &al);
dsoname = get_dsoname(al.map);
pydict_set_item_string_decref(pyelem, "to_dsoname",
_PyUnicode_FromString(dsoname));
PyList_Append(pylist, pyelem);
Py_DECREF(pyelem);
}
exit:
return pylist;
}
static unsigned long get_offset(struct symbol *sym, struct addr_location *al)
{
unsigned long offset;
if (al->addr < sym->end)
offset = al->addr - sym->start;
else
offset = al->addr - al->map->start - sym->start;
return offset;
}
static int get_symoff(struct symbol *sym, struct addr_location *al,
bool print_off, char *bf, int size)
{
unsigned long offset;
if (!sym || !sym->name[0])
return scnprintf(bf, size, "%s", "[unknown]");
if (!print_off)
return scnprintf(bf, size, "%s", sym->name);
offset = get_offset(sym, al);
return scnprintf(bf, size, "%s+0x%x", sym->name, offset);
}
static int get_br_mspred(struct branch_flags *flags, char *bf, int size)
{
if (!flags->mispred && !flags->predicted)
return scnprintf(bf, size, "%s", "-");
if (flags->mispred)
return scnprintf(bf, size, "%s", "M");
return scnprintf(bf, size, "%s", "P");
}
static PyObject *python_process_brstacksym(struct perf_sample *sample,
struct thread *thread)
{
struct branch_stack *br = sample->branch_stack;
struct branch_entry *entries = perf_sample__branch_entries(sample);
PyObject *pylist;
u64 i;
char bf[512];
struct addr_location al;
pylist = PyList_New(0);
if (!pylist)
Py_FatalError("couldn't create Python list");
if (!(br && br->nr))
goto exit;
for (i = 0; i < br->nr; i++) {
PyObject *pyelem;
pyelem = PyDict_New();
if (!pyelem)
Py_FatalError("couldn't create Python dictionary");
thread__find_symbol_fb(thread, sample->cpumode,
entries[i].from, &al);
get_symoff(al.sym, &al, true, bf, sizeof(bf));
pydict_set_item_string_decref(pyelem, "from",
_PyUnicode_FromString(bf));
thread__find_symbol_fb(thread, sample->cpumode,
entries[i].to, &al);
get_symoff(al.sym, &al, true, bf, sizeof(bf));
pydict_set_item_string_decref(pyelem, "to",
_PyUnicode_FromString(bf));
get_br_mspred(&entries[i].flags, bf, sizeof(bf));
pydict_set_item_string_decref(pyelem, "pred",
_PyUnicode_FromString(bf));
if (entries[i].flags.in_tx) {
pydict_set_item_string_decref(pyelem, "in_tx",
_PyUnicode_FromString("X"));
} else {
pydict_set_item_string_decref(pyelem, "in_tx",
_PyUnicode_FromString("-"));
}
if (entries[i].flags.abort) {
pydict_set_item_string_decref(pyelem, "abort",
_PyUnicode_FromString("A"));
} else {
pydict_set_item_string_decref(pyelem, "abort",
_PyUnicode_FromString("-"));
}
PyList_Append(pylist, pyelem);
Py_DECREF(pyelem);
}
exit:
return pylist;
}
static PyObject *get_sample_value_as_tuple(struct sample_read_value *value)
{
PyObject *t;
t = PyTuple_New(2);
if (!t)
Py_FatalError("couldn't create Python tuple");
PyTuple_SetItem(t, 0, PyLong_FromUnsignedLongLong(value->id));
PyTuple_SetItem(t, 1, PyLong_FromUnsignedLongLong(value->value));
return t;
}
static void set_sample_read_in_dict(PyObject *dict_sample,
struct perf_sample *sample,
struct evsel *evsel)
{
u64 read_format = evsel->core.attr.read_format;
PyObject *values;
unsigned int i;
if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
pydict_set_item_string_decref(dict_sample, "time_enabled",
PyLong_FromUnsignedLongLong(sample->read.time_enabled));
}
if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
pydict_set_item_string_decref(dict_sample, "time_running",
PyLong_FromUnsignedLongLong(sample->read.time_running));
}
if (read_format & PERF_FORMAT_GROUP)
values = PyList_New(sample->read.group.nr);
else
values = PyList_New(1);
if (!values)
Py_FatalError("couldn't create Python list");
if (read_format & PERF_FORMAT_GROUP) {
for (i = 0; i < sample->read.group.nr; i++) {
PyObject *t = get_sample_value_as_tuple(&sample->read.group.values[i]);
PyList_SET_ITEM(values, i, t);
}
} else {
PyObject *t = get_sample_value_as_tuple(&sample->read.one);
PyList_SET_ITEM(values, 0, t);
}
pydict_set_item_string_decref(dict_sample, "values", values);
}
static void set_sample_datasrc_in_dict(PyObject *dict,
struct perf_sample *sample)
{
struct mem_info mi = { .data_src.val = sample->data_src };
char decode[100];
pydict_set_item_string_decref(dict, "datasrc",
PyLong_FromUnsignedLongLong(sample->data_src));
perf_script__meminfo_scnprintf(decode, 100, &mi);
pydict_set_item_string_decref(dict, "datasrc_decode",
_PyUnicode_FromString(decode));
}
static void regs_map(struct regs_dump *regs, uint64_t mask, char *bf, int size)
{
unsigned int i = 0, r;
int printed = 0;
bf[0] = 0;
if (!regs || !regs->regs)
return;
for_each_set_bit(r, (unsigned long *) &mask, sizeof(mask) * 8) {
u64 val = regs->regs[i++];
printed += scnprintf(bf + printed, size - printed,
"%5s:0x%" PRIx64 " ",
perf_reg_name(r), val);
}
}
static void set_regs_in_dict(PyObject *dict,
struct perf_sample *sample,
struct evsel *evsel)
{
struct perf_event_attr *attr = &evsel->core.attr;
/*
* Here value 28 is a constant size which can be used to print
* one register value and its corresponds to:
* 16 chars is to specify 64 bit register in hexadecimal.
* 2 chars is for appending "0x" to the hexadecimal value and
* 10 chars is for register name.
*/
int size = __sw_hweight64(attr->sample_regs_intr) * 28;
char bf[size];
regs_map(&sample->intr_regs, attr->sample_regs_intr, bf, sizeof(bf));
pydict_set_item_string_decref(dict, "iregs",
_PyUnicode_FromString(bf));
regs_map(&sample->user_regs, attr->sample_regs_user, bf, sizeof(bf));
pydict_set_item_string_decref(dict, "uregs",
_PyUnicode_FromString(bf));
}
static PyObject *get_perf_sample_dict(struct perf_sample *sample,
struct evsel *evsel,
struct addr_location *al,
PyObject *callchain)
{
PyObject *dict, *dict_sample, *brstack, *brstacksym;
dict = PyDict_New();
if (!dict)
Py_FatalError("couldn't create Python dictionary");
dict_sample = PyDict_New();
if (!dict_sample)
Py_FatalError("couldn't create Python dictionary");
pydict_set_item_string_decref(dict, "ev_name", _PyUnicode_FromString(evsel__name(evsel)));
pydict_set_item_string_decref(dict, "attr", _PyBytes_FromStringAndSize((const char *)&evsel->core.attr, sizeof(evsel->core.attr)));
pydict_set_item_string_decref(dict_sample, "pid",
_PyLong_FromLong(sample->pid));
pydict_set_item_string_decref(dict_sample, "tid",
_PyLong_FromLong(sample->tid));
pydict_set_item_string_decref(dict_sample, "cpu",
_PyLong_FromLong(sample->cpu));
pydict_set_item_string_decref(dict_sample, "ip",
PyLong_FromUnsignedLongLong(sample->ip));
pydict_set_item_string_decref(dict_sample, "time",
PyLong_FromUnsignedLongLong(sample->time));
pydict_set_item_string_decref(dict_sample, "period",
PyLong_FromUnsignedLongLong(sample->period));
pydict_set_item_string_decref(dict_sample, "phys_addr",
PyLong_FromUnsignedLongLong(sample->phys_addr));
pydict_set_item_string_decref(dict_sample, "addr",
PyLong_FromUnsignedLongLong(sample->addr));
set_sample_read_in_dict(dict_sample, sample, evsel);
pydict_set_item_string_decref(dict_sample, "weight",
PyLong_FromUnsignedLongLong(sample->weight));
pydict_set_item_string_decref(dict_sample, "transaction",
PyLong_FromUnsignedLongLong(sample->transaction));
set_sample_datasrc_in_dict(dict_sample, sample);
pydict_set_item_string_decref(dict, "sample", dict_sample);
pydict_set_item_string_decref(dict, "raw_buf", _PyBytes_FromStringAndSize(
(const char *)sample->raw_data, sample->raw_size));
pydict_set_item_string_decref(dict, "comm",
_PyUnicode_FromString(thread__comm_str(al->thread)));
if (al->map) {
pydict_set_item_string_decref(dict, "dso",
_PyUnicode_FromString(al->map->dso->name));
}
if (al->sym) {
pydict_set_item_string_decref(dict, "symbol",
_PyUnicode_FromString(al->sym->name));
}
pydict_set_item_string_decref(dict, "callchain", callchain);
brstack = python_process_brstack(sample, al->thread);
pydict_set_item_string_decref(dict, "brstack", brstack);
brstacksym = python_process_brstacksym(sample, al->thread);
pydict_set_item_string_decref(dict, "brstacksym", brstacksym);
set_regs_in_dict(dict, sample, evsel);
return dict;
}
static void python_process_tracepoint(struct perf_sample *sample,
struct evsel *evsel,
struct addr_location *al)
{
struct tep_event *event = evsel->tp_format;
PyObject *handler, *context, *t, *obj = NULL, *callchain;
PyObject *dict = NULL, *all_entries_dict = NULL;
static char handler_name[256];
struct tep_format_field *field;
unsigned long s, ns;
unsigned n = 0;
int pid;
int cpu = sample->cpu;
void *data = sample->raw_data;
unsigned long long nsecs = sample->time;
const char *comm = thread__comm_str(al->thread);
const char *default_handler_name = "trace_unhandled";
if (!event) {
snprintf(handler_name, sizeof(handler_name),
"ug! no event found for type %" PRIu64, (u64)evsel->core.attr.config);
Py_FatalError(handler_name);
}
pid = raw_field_value(event, "common_pid", data);
sprintf(handler_name, "%s__%s", event->system, event->name);
if (!test_and_set_bit(event->id, events_defined))
define_event_symbols(event, handler_name, event->print_fmt.args);
handler = get_handler(handler_name);
if (!handler) {
handler = get_handler(default_handler_name);
if (!handler)
return;
dict = PyDict_New();
if (!dict)
Py_FatalError("couldn't create Python dict");
}
t = PyTuple_New(MAX_FIELDS);
if (!t)
Py_FatalError("couldn't create Python tuple");
s = nsecs / NSEC_PER_SEC;
ns = nsecs - s * NSEC_PER_SEC;
scripting_context->event_data = data;
scripting_context->pevent = evsel->tp_format->tep;
context = _PyCapsule_New(scripting_context, NULL, NULL);
PyTuple_SetItem(t, n++, _PyUnicode_FromString(handler_name));
PyTuple_SetItem(t, n++, context);
/* ip unwinding */
callchain = python_process_callchain(sample, evsel, al);
/* Need an additional reference for the perf_sample dict */
Py_INCREF(callchain);
if (!dict) {
PyTuple_SetItem(t, n++, _PyLong_FromLong(cpu));
PyTuple_SetItem(t, n++, _PyLong_FromLong(s));
PyTuple_SetItem(t, n++, _PyLong_FromLong(ns));
PyTuple_SetItem(t, n++, _PyLong_FromLong(pid));
PyTuple_SetItem(t, n++, _PyUnicode_FromString(comm));
PyTuple_SetItem(t, n++, callchain);
} else {
pydict_set_item_string_decref(dict, "common_cpu", _PyLong_FromLong(cpu));
pydict_set_item_string_decref(dict, "common_s", _PyLong_FromLong(s));
pydict_set_item_string_decref(dict, "common_ns", _PyLong_FromLong(ns));
pydict_set_item_string_decref(dict, "common_pid", _PyLong_FromLong(pid));
pydict_set_item_string_decref(dict, "common_comm", _PyUnicode_FromString(comm));
pydict_set_item_string_decref(dict, "common_callchain", callchain);
}
for (field = event->format.fields; field; field = field->next) {
unsigned int offset, len;
unsigned long long val;
if (field->flags & TEP_FIELD_IS_ARRAY) {
offset = field->offset;
len = field->size;
if (field->flags & TEP_FIELD_IS_DYNAMIC) {
val = tep_read_number(scripting_context->pevent,
data + offset, len);
offset = val;
len = offset >> 16;
offset &= 0xffff;
}
if (field->flags & TEP_FIELD_IS_STRING &&
is_printable_array(data + offset, len)) {
obj = _PyUnicode_FromString((char *) data + offset);
} else {
obj = PyByteArray_FromStringAndSize((const char *) data + offset, len);
field->flags &= ~TEP_FIELD_IS_STRING;
}
} else { /* FIELD_IS_NUMERIC */
obj = get_field_numeric_entry(event, field, data);
}
if (!dict)
PyTuple_SetItem(t, n++, obj);
else
pydict_set_item_string_decref(dict, field->name, obj);
}
if (dict)
PyTuple_SetItem(t, n++, dict);
if (get_argument_count(handler) == (int) n + 1) {
all_entries_dict = get_perf_sample_dict(sample, evsel, al,
callchain);
PyTuple_SetItem(t, n++, all_entries_dict);
} else {
Py_DECREF(callchain);
}
if (_PyTuple_Resize(&t, n) == -1)
Py_FatalError("error resizing Python tuple");
if (!dict)
call_object(handler, t, handler_name);
else
call_object(handler, t, default_handler_name);
Py_DECREF(t);
}
static PyObject *tuple_new(unsigned int sz)
{
PyObject *t;
t = PyTuple_New(sz);
if (!t)
Py_FatalError("couldn't create Python tuple");
return t;
}
static int tuple_set_s64(PyObject *t, unsigned int pos, s64 val)
{
#if BITS_PER_LONG == 64
return PyTuple_SetItem(t, pos, _PyLong_FromLong(val));
#endif
#if BITS_PER_LONG == 32
return PyTuple_SetItem(t, pos, PyLong_FromLongLong(val));
#endif
}
/*
* Databases support only signed 64-bit numbers, so even though we are
* exporting a u64, it must be as s64.
*/
#define tuple_set_d64 tuple_set_s64
static int tuple_set_u64(PyObject *t, unsigned int pos, u64 val)
{
#if BITS_PER_LONG == 64
return PyTuple_SetItem(t, pos, PyLong_FromUnsignedLong(val));
#endif
#if BITS_PER_LONG == 32
return PyTuple_SetItem(t, pos, PyLong_FromUnsignedLongLong(val));
#endif
}
static int tuple_set_s32(PyObject *t, unsigned int pos, s32 val)
{
return PyTuple_SetItem(t, pos, _PyLong_FromLong(val));
}
static int tuple_set_string(PyObject *t, unsigned int pos, const char *s)
{
return PyTuple_SetItem(t, pos, _PyUnicode_FromString(s));
}
static int tuple_set_bytes(PyObject *t, unsigned int pos, void *bytes,
unsigned int sz)
{
return PyTuple_SetItem(t, pos, _PyBytes_FromStringAndSize(bytes, sz));
}
static int python_export_evsel(struct db_export *dbe, struct evsel *evsel)
{
struct tables *tables = container_of(dbe, struct tables, dbe);
PyObject *t;
t = tuple_new(2);
tuple_set_d64(t, 0, evsel->db_id);
tuple_set_string(t, 1, evsel__name(evsel));
call_object(tables->evsel_handler, t, "evsel_table");
Py_DECREF(t);
return 0;