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    Subject[PATCH 06/10] perf/scripts: Add Python scripting engine
    Date
    From: Tom Zanussi <tzanussi@gmail.com>

    Add base support for Python scripting to perf trace.

    Signed-off-by: Tom Zanussi <tzanussi@gmail.com>
    Cc: Ingo Molnar <mingo@elte.hu>
    Cc: Steven Rostedt <rostedt@goodmis.org>
    Cc: Keiichi KII <k-keiichi@bx.jp.nec.com>
    Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
    Cc: Paul Mackerras <paulus@samba.org>
    Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
    LKML-Reference: <1264580883-15324-6-git-send-email-tzanussi@gmail.com>
    Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
    ---
    tools/perf/Makefile | 21 +
    tools/perf/builtin-trace.c | 1 +
    .../perf/scripts/python/Perf-Trace-Util/Context.c | 88 +++
    .../python/Perf-Trace-Util/lib/Perf/Trace/Core.py | 91 +++
    .../python/Perf-Trace-Util/lib/Perf/Trace/Util.py | 25 +
    .../util/scripting-engines/trace-event-python.c | 576 ++++++++++++++++++++
    tools/perf/util/trace-event-scripting.c | 61 ++
    tools/perf/util/trace-event.h | 1 +
    8 files changed, 864 insertions(+), 0 deletions(-)
    create mode 100644 tools/perf/scripts/python/Perf-Trace-Util/Context.c
    create mode 100644 tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/Core.py
    create mode 100644 tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/Util.py
    create mode 100644 tools/perf/util/scripting-engines/trace-event-python.c

    diff --git a/tools/perf/Makefile b/tools/perf/Makefile
    index 0a3c0c8..1427316 100644
    --- a/tools/perf/Makefile
    +++ b/tools/perf/Makefile
    @@ -522,6 +522,19 @@ else
    LIB_OBJS += scripts/perl/Perf-Trace-Util/Context.o
    endif

    +ifndef NO_LIBPYTHON
    +PYTHON_EMBED_LDOPTS = `python-config --ldflags 2>/dev/null`
    +PYTHON_EMBED_CCOPTS = `python-config --cflags 2>/dev/null`
    +endif
    +
    +ifneq ($(shell sh -c "(echo '\#include <Python.h>'; echo 'int main(void) { Py_Initialize(); return 0; }') | $(CC) -x c - $(PYTHON_EMBED_CCOPTS) -o /dev/null $(PYTHON_EMBED_LDOPTS) > /dev/null 2>&1 && echo y"), y)
    + BASIC_CFLAGS += -DNO_LIBPYTHON
    +else
    + ALL_LDFLAGS += $(PYTHON_EMBED_LDOPTS)
    + LIB_OBJS += util/scripting-engines/trace-event-python.o
    + LIB_OBJS += scripts/python/Perf-Trace-Util/Context.o
    +endif
    +
    ifdef NO_DEMANGLE
    BASIC_CFLAGS += -DNO_DEMANGLE
    else
    @@ -899,6 +912,12 @@ util/scripting-engines/trace-event-perl.o: util/scripting-engines/trace-event-pe
    scripts/perl/Perf-Trace-Util/Context.o: scripts/perl/Perf-Trace-Util/Context.c PERF-CFLAGS
    $(QUIET_CC)$(CC) -o scripts/perl/Perf-Trace-Util/Context.o -c $(ALL_CFLAGS) $(PERL_EMBED_CCOPTS) -Wno-redundant-decls -Wno-strict-prototypes -Wno-unused-parameter -Wno-nested-externs $<

    +util/scripting-engines/trace-event-python.o: util/scripting-engines/trace-event-python.c PERF-CFLAGS
    + $(QUIET_CC)$(CC) -o util/scripting-engines/trace-event-python.o -c $(ALL_CFLAGS) $(PYTHON_EMBED_CCOPTS) -Wno-redundant-decls -Wno-strict-prototypes -Wno-unused-parameter -Wno-shadow $<
    +
    +scripts/python/Perf-Trace-Util/Context.o: scripts/python/Perf-Trace-Util/Context.c PERF-CFLAGS
    + $(QUIET_CC)$(CC) -o scripts/python/Perf-Trace-Util/Context.o -c $(ALL_CFLAGS) $(PYTHON_EMBED_CCOPTS) -Wno-redundant-decls -Wno-strict-prototypes -Wno-unused-parameter -Wno-nested-externs $<
    +
    perf-%$X: %.o $(PERFLIBS)
    $(QUIET_LINK)$(CC) $(ALL_CFLAGS) -o $@ $(ALL_LDFLAGS) $(filter %.o,$^) $(LIBS)

    @@ -1012,6 +1031,8 @@ install: all
    $(INSTALL) scripts/perl/Perf-Trace-Util/lib/Perf/Trace/* -t '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/scripts/perl/Perf-Trace-Util/lib/Perf/Trace'
    $(INSTALL) scripts/perl/*.pl -t '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/scripts/perl'
    $(INSTALL) scripts/perl/bin/* -t '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/scripts/perl/bin'
    + $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/scripts/python/Perf-Trace-Util/lib/Perf/Trace'
    + $(INSTALL) scripts/python/Perf-Trace-Util/lib/Perf/Trace/* -t '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/scripts/python/Perf-Trace-Util/lib/Perf/Trace'

    ifdef BUILT_INS
    $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(perfexec_instdir_SQ)'
    diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
    index d5d20c3..5db687f 100644
    --- a/tools/perf/builtin-trace.c
    +++ b/tools/perf/builtin-trace.c
    @@ -44,6 +44,7 @@ static void setup_scripting(void)
    perf_set_argv_exec_path(perf_exec_path());

    setup_perl_scripting();
    + setup_python_scripting();

    scripting_ops = &default_scripting_ops;
    }
    diff --git a/tools/perf/scripts/python/Perf-Trace-Util/Context.c b/tools/perf/scripts/python/Perf-Trace-Util/Context.c
    new file mode 100644
    index 0000000..957085d
    --- /dev/null
    +++ b/tools/perf/scripts/python/Perf-Trace-Util/Context.c
    @@ -0,0 +1,88 @@
    +/*
    + * Context.c. Python interfaces for perf trace.
    + *
    + * 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 "../../../perf.h"
    +#include "../../../util/trace-event.h"
    +
    +PyMODINIT_FUNC initperf_trace_context(void);
    +
    +static PyObject *perf_trace_context_common_pc(PyObject *self, PyObject *args)
    +{
    + static struct scripting_context *scripting_context;
    + PyObject *context;
    + int retval;
    +
    + if (!PyArg_ParseTuple(args, "O", &context))
    + return NULL;
    +
    + scripting_context = PyCObject_AsVoidPtr(context);
    + retval = common_pc(scripting_context);
    +
    + return Py_BuildValue("i", retval);
    +}
    +
    +static PyObject *perf_trace_context_common_flags(PyObject *self,
    + PyObject *args)
    +{
    + static struct scripting_context *scripting_context;
    + PyObject *context;
    + int retval;
    +
    + if (!PyArg_ParseTuple(args, "O", &context))
    + return NULL;
    +
    + scripting_context = PyCObject_AsVoidPtr(context);
    + retval = common_flags(scripting_context);
    +
    + return Py_BuildValue("i", retval);
    +}
    +
    +static PyObject *perf_trace_context_common_lock_depth(PyObject *self,
    + PyObject *args)
    +{
    + static struct scripting_context *scripting_context;
    + PyObject *context;
    + int retval;
    +
    + if (!PyArg_ParseTuple(args, "O", &context))
    + return NULL;
    +
    + scripting_context = PyCObject_AsVoidPtr(context);
    + retval = common_lock_depth(scripting_context);
    +
    + return Py_BuildValue("i", retval);
    +}
    +
    +static PyMethodDef ContextMethods[] = {
    + { "common_pc", perf_trace_context_common_pc, METH_VARARGS,
    + "Get the common preempt count event field value."},
    + { "common_flags", perf_trace_context_common_flags, METH_VARARGS,
    + "Get the common flags event field value."},
    + { "common_lock_depth", perf_trace_context_common_lock_depth,
    + METH_VARARGS, "Get the common lock depth event field value."},
    + { NULL, NULL, 0, NULL}
    +};
    +
    +PyMODINIT_FUNC initperf_trace_context(void)
    +{
    + (void) Py_InitModule("perf_trace_context", ContextMethods);
    +}
    diff --git a/tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/Core.py b/tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/Core.py
    new file mode 100644
    index 0000000..1dc464e
    --- /dev/null
    +++ b/tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/Core.py
    @@ -0,0 +1,91 @@
    +# Core.py - Python extension for perf trace, core functions
    +#
    +# Copyright (C) 2010 by Tom Zanussi <tzanussi@gmail.com>
    +#
    +# This software may be distributed under the terms of the GNU General
    +# Public License ("GPL") version 2 as published by the Free Software
    +# Foundation.
    +
    +from collections import defaultdict
    +
    +def autodict():
    + return defaultdict(autodict)
    +
    +flag_fields = autodict()
    +symbolic_fields = autodict()
    +
    +def define_flag_field(event_name, field_name, delim):
    + flag_fields[event_name][field_name]['delim'] = delim
    +
    +def define_flag_value(event_name, field_name, value, field_str):
    + flag_fields[event_name][field_name]['values'][value] = field_str
    +
    +def define_symbolic_field(event_name, field_name):
    + # nothing to do, really
    + pass
    +
    +def define_symbolic_value(event_name, field_name, value, field_str):
    + symbolic_fields[event_name][field_name]['values'][value] = field_str
    +
    +def flag_str(event_name, field_name, value):
    + string = ""
    +
    + if flag_fields[event_name][field_name]:
    + print_delim = 0
    + keys = flag_fields[event_name][field_name]['values'].keys()
    + keys.sort()
    + for idx in keys:
    + if not value and not idx:
    + string += flag_fields[event_name][field_name]['values'][idx]
    + break
    + if idx and (value & idx) == idx:
    + if print_delim and flag_fields[event_name][field_name]['delim']:
    + string += " " + flag_fields[event_name][field_name]['delim'] + " "
    + string += flag_fields[event_name][field_name]['values'][idx]
    + print_delim = 1
    + value &= ~idx
    +
    + return string
    +
    +def symbol_str(event_name, field_name, value):
    + string = ""
    +
    + if symbolic_fields[event_name][field_name]:
    + keys = symbolic_fields[event_name][field_name]['values'].keys()
    + keys.sort()
    + for idx in keys:
    + if not value and not idx:
    + string = symbolic_fields[event_name][field_name]['values'][idx]
    + break
    + if (value == idx):
    + string = symbolic_fields[event_name][field_name]['values'][idx]
    + break
    +
    + return string
    +
    +trace_flags = { 0x00: "NONE", \
    + 0x01: "IRQS_OFF", \
    + 0x02: "IRQS_NOSUPPORT", \
    + 0x04: "NEED_RESCHED", \
    + 0x08: "HARDIRQ", \
    + 0x10: "SOFTIRQ" }
    +
    +def trace_flag_str(value):
    + string = ""
    + print_delim = 0
    +
    + keys = trace_flags.keys()
    +
    + for idx in keys:
    + if not value and not idx:
    + string += "NONE"
    + break
    +
    + if idx and (value & idx) == idx:
    + if print_delim:
    + string += " | ";
    + string += trace_flags[idx]
    + print_delim = 1
    + value &= ~idx
    +
    + return string
    diff --git a/tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/Util.py b/tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/Util.py
    new file mode 100644
    index 0000000..83e9143
    --- /dev/null
    +++ b/tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/Util.py
    @@ -0,0 +1,25 @@
    +# Util.py - Python extension for perf trace, miscellaneous utility code
    +#
    +# Copyright (C) 2010 by Tom Zanussi <tzanussi@gmail.com>
    +#
    +# This software may be distributed under the terms of the GNU General
    +# Public License ("GPL") version 2 as published by the Free Software
    +# Foundation.
    +
    +NSECS_PER_SEC = 1000000000
    +
    +def avg(total, n):
    + return total / n
    +
    +def nsecs(secs, nsecs):
    + return secs * NSECS_PER_SEC + nsecs
    +
    +def nsecs_secs(nsecs):
    + return nsecs / NSECS_PER_SEC
    +
    +def nsecs_nsecs(nsecs):
    + return nsecs % NSECS_PER_SEC
    +
    +def nsecs_str(nsecs):
    + str = "%5u.%09u" % (nsecs_secs(nsecs), nsecs_nsecs(nsecs)),
    + return str
    diff --git a/tools/perf/util/scripting-engines/trace-event-python.c b/tools/perf/util/scripting-engines/trace-event-python.c
    new file mode 100644
    index 0000000..d402f64
    --- /dev/null
    +++ b/tools/perf/util/scripting-engines/trace-event-python.c
    @@ -0,0 +1,576 @@
    +/*
    + * 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 <stdio.h>
    +#include <stdlib.h>
    +#include <string.h>
    +#include <ctype.h>
    +#include <errno.h>
    +
    +#include "../../perf.h"
    +#include "../util.h"
    +#include "../trace-event.h"
    +
    +PyMODINIT_FUNC initperf_trace_context(void);
    +
    +#define FTRACE_MAX_EVENT \
    + ((1 << (sizeof(unsigned short) * 8)) - 1)
    +
    +struct event *events[FTRACE_MAX_EVENT];
    +
    +#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;
    +
    +static void handler_call_die(const char *handler_name)
    +{
    + PyErr_Print();
    + Py_FatalError("problem in Python trace event handler");
    +}
    +
    +static void define_value(enum 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 *handler, *t, *retval;
    + unsigned long long value;
    + unsigned n = 0;
    +
    + if (field_type == PRINT_SYMBOL)
    + handler_name = "define_symbolic_value";
    +
    + t = PyTuple_New(MAX_FIELDS);
    + if (!t)
    + Py_FatalError("couldn't create Python tuple");
    +
    + value = eval_flag(field_value);
    +
    + PyTuple_SetItem(t, n++, PyString_FromString(ev_name));
    + PyTuple_SetItem(t, n++, PyString_FromString(field_name));
    + PyTuple_SetItem(t, n++, PyInt_FromLong(value));
    + PyTuple_SetItem(t, n++, PyString_FromString(field_str));
    +
    + if (_PyTuple_Resize(&t, n) == -1)
    + Py_FatalError("error resizing Python tuple");
    +
    + handler = PyDict_GetItemString(main_dict, handler_name);
    + if (handler && PyCallable_Check(handler)) {
    + retval = PyObject_CallObject(handler, t);
    + if (retval == NULL)
    + handler_call_die(handler_name);
    + }
    +
    + Py_DECREF(t);
    +}
    +
    +static void define_values(enum print_arg_type field_type,
    + struct 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 print_arg_type field_type,
    + const char *ev_name,
    + const char *field_name,
    + const char *delim)
    +{
    + const char *handler_name = "define_flag_field";
    + PyObject *handler, *t, *retval;
    + unsigned n = 0;
    +
    + if (field_type == PRINT_SYMBOL)
    + handler_name = "define_symbolic_field";
    +
    + t = PyTuple_New(MAX_FIELDS);
    + if (!t)
    + Py_FatalError("couldn't create Python tuple");
    +
    + PyTuple_SetItem(t, n++, PyString_FromString(ev_name));
    + PyTuple_SetItem(t, n++, PyString_FromString(field_name));
    + if (field_type == PRINT_FLAGS)
    + PyTuple_SetItem(t, n++, PyString_FromString(delim));
    +
    + if (_PyTuple_Resize(&t, n) == -1)
    + Py_FatalError("error resizing Python tuple");
    +
    + handler = PyDict_GetItemString(main_dict, handler_name);
    + if (handler && PyCallable_Check(handler)) {
    + retval = PyObject_CallObject(handler, t);
    + if (retval == NULL)
    + handler_call_die(handler_name);
    + }
    +
    + Py_DECREF(t);
    +}
    +
    +static void define_event_symbols(struct event *event,
    + const char *ev_name,
    + struct print_arg *args)
    +{
    + switch (args->type) {
    + case PRINT_NULL:
    + break;
    + case PRINT_ATOM:
    + define_value(PRINT_FLAGS, ev_name, cur_field_name, "0",
    + args->atom.atom);
    + zero_flag_atom = 0;
    + break;
    + case PRINT_FIELD:
    + if (cur_field_name)
    + free(cur_field_name);
    + cur_field_name = strdup(args->field.name);
    + break;
    + case PRINT_FLAGS:
    + define_event_symbols(event, ev_name, args->flags.field);
    + define_field(PRINT_FLAGS, ev_name, cur_field_name,
    + args->flags.delim);
    + define_values(PRINT_FLAGS, args->flags.flags, ev_name,
    + cur_field_name);
    + break;
    + case PRINT_SYMBOL:
    + define_event_symbols(event, ev_name, args->symbol.field);
    + define_field(PRINT_SYMBOL, ev_name, cur_field_name, NULL);
    + define_values(PRINT_SYMBOL, args->symbol.symbols, ev_name,
    + cur_field_name);
    + break;
    + case PRINT_STRING:
    + break;
    + case PRINT_TYPE:
    + define_event_symbols(event, ev_name, args->typecast.item);
    + break;
    + case 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:
    + /* we should warn... */
    + return;
    + }
    +
    + if (args->next)
    + define_event_symbols(event, ev_name, args->next);
    +}
    +
    +static inline struct event *find_cache_event(int type)
    +{
    + static char ev_name[256];
    + struct event *event;
    +
    + if (events[type])
    + return events[type];
    +
    + events[type] = event = trace_find_event(type);
    + if (!event)
    + return NULL;
    +
    + sprintf(ev_name, "%s__%s", event->system, event->name);
    +
    + define_event_symbols(event, ev_name, event->print_fmt.args);
    +
    + return event;
    +}
    +
    +static void python_process_event(int cpu, void *data,
    + int size __unused,
    + unsigned long long nsecs, char *comm)
    +{
    + PyObject *handler, *retval, *context, *t;
    + static char handler_name[256];
    + struct format_field *field;
    + unsigned long long val;
    + unsigned long s, ns;
    + struct event *event;
    + unsigned n = 0;
    + int type;
    + int pid;
    +
    + t = PyTuple_New(MAX_FIELDS);
    + if (!t)
    + Py_FatalError("couldn't create Python tuple");
    +
    + type = trace_parse_common_type(data);
    +
    + event = find_cache_event(type);
    + if (!event)
    + die("ug! no event found for type %d", type);
    +
    + pid = trace_parse_common_pid(data);
    +
    + sprintf(handler_name, "%s__%s", event->system, event->name);
    +
    + s = nsecs / NSECS_PER_SEC;
    + ns = nsecs - s * NSECS_PER_SEC;
    +
    + scripting_context->event_data = data;
    +
    + context = PyCObject_FromVoidPtr(scripting_context, NULL);
    +
    + PyTuple_SetItem(t, n++, PyString_FromString(handler_name));
    + PyTuple_SetItem(t, n++,
    + PyCObject_FromVoidPtr(scripting_context, NULL));
    + PyTuple_SetItem(t, n++, PyInt_FromLong(cpu));
    + PyTuple_SetItem(t, n++, PyInt_FromLong(s));
    + PyTuple_SetItem(t, n++, PyInt_FromLong(ns));
    + PyTuple_SetItem(t, n++, PyInt_FromLong(pid));
    + PyTuple_SetItem(t, n++, PyString_FromString(comm));
    +
    + for (field = event->format.fields; field; field = field->next) {
    + if (field->flags & FIELD_IS_STRING) {
    + int offset;
    + if (field->flags & FIELD_IS_DYNAMIC) {
    + offset = *(int *)(data + field->offset);
    + offset &= 0xffff;
    + } else
    + offset = field->offset;
    + PyTuple_SetItem(t, n++,
    + PyString_FromString((char *)data + offset));
    + } else { /* FIELD_IS_NUMERIC */
    + val = read_size(data + field->offset, field->size);
    + if (field->flags & FIELD_IS_SIGNED) {
    + PyTuple_SetItem(t, n++, PyInt_FromLong(val));
    + } else {
    + PyTuple_SetItem(t, n++, PyInt_FromLong(val));
    + }
    + }
    + }
    +
    + if (_PyTuple_Resize(&t, n) == -1)
    + Py_FatalError("error resizing Python tuple");
    +
    + handler = PyDict_GetItemString(main_dict, handler_name);
    + if (handler && PyCallable_Check(handler)) {
    + retval = PyObject_CallObject(handler, t);
    + if (retval == NULL)
    + handler_call_die(handler_name);
    + } else {
    + handler = PyDict_GetItemString(main_dict, "trace_unhandled");
    + if (handler && PyCallable_Check(handler)) {
    + if (_PyTuple_Resize(&t, N_COMMON_FIELDS) == -1)
    + Py_FatalError("error resizing Python tuple");
    +
    + retval = PyObject_CallObject(handler, t);
    + if (retval == NULL)
    + handler_call_die("trace_unhandled");
    + }
    + }
    +
    + Py_DECREF(t);
    +}
    +
    +static int run_start_sub(void)
    +{
    + PyObject *handler, *retval;
    + int err = 0;
    +
    + main_module = PyImport_AddModule("__main__");
    + if (main_module == NULL)
    + return -1;
    + Py_INCREF(main_module);
    +
    + main_dict = PyModule_GetDict(main_module);
    + if (main_dict == NULL) {
    + err = -1;
    + goto error;
    + }
    + Py_INCREF(main_dict);
    +
    + handler = PyDict_GetItemString(main_dict, "trace_begin");
    + if (handler == NULL || !PyCallable_Check(handler))
    + goto out;
    +
    + retval = PyObject_CallObject(handler, NULL);
    + if (retval == NULL)
    + handler_call_die("trace_begin");
    +
    + Py_DECREF(retval);
    + return err;
    +error:
    + Py_XDECREF(main_dict);
    + Py_XDECREF(main_module);
    +out:
    + return err;
    +}
    +
    +/*
    + * Start trace script
    + */
    +static int python_start_script(const char *script, int argc, const char **argv)
    +{
    + const char **command_line;
    + char buf[PATH_MAX];
    + int i, err = 0;
    + FILE *fp;
    +
    + command_line = malloc((argc + 1) * sizeof(const char *));
    + command_line[0] = script;
    + for (i = 1; i < argc + 1; i++)
    + command_line[i] = argv[i - 1];
    +
    + Py_Initialize();
    +
    + initperf_trace_context();
    +
    + PySys_SetArgv(argc + 1, (char **)command_line);
    +
    + fp = fopen(script, "r");
    + if (!fp) {
    + sprintf(buf, "Can't open python script \"%s\"", script);
    + perror(buf);
    + err = -1;
    + goto error;
    + }
    +
    + err = PyRun_SimpleFile(fp, script);
    + if (err) {
    + fprintf(stderr, "Error running python script %s\n", script);
    + goto error;
    + }
    +
    + err = run_start_sub();
    + if (err) {
    + fprintf(stderr, "Error starting python script %s\n", script);
    + goto error;
    + }
    +
    + free(command_line);
    + fprintf(stderr, "perf trace started with Python script %s\n\n",
    + script);
    +
    + return err;
    +error:
    + Py_Finalize();
    + free(command_line);
    +
    + return err;
    +}
    +
    +/*
    + * Stop trace script
    + */
    +static int python_stop_script(void)
    +{
    + PyObject *handler, *retval;
    + int err = 0;
    +
    + handler = PyDict_GetItemString(main_dict, "trace_end");
    + if (handler == NULL || !PyCallable_Check(handler))
    + goto out;
    +
    + retval = PyObject_CallObject(handler, NULL);
    + if (retval == NULL)
    + handler_call_die("trace_end");
    + else
    + Py_DECREF(retval);
    +out:
    + Py_XDECREF(main_dict);
    + Py_XDECREF(main_module);
    + Py_Finalize();
    +
    + fprintf(stderr, "\nperf trace Python script stopped\n");
    +
    + return err;
    +}
    +
    +static int python_generate_script(const char *outfile)
    +{
    + struct event *event = NULL;
    + struct format_field *f;
    + char fname[PATH_MAX];
    + int not_first, count;
    + FILE *ofp;
    +
    + sprintf(fname, "%s.py", outfile);
    + ofp = fopen(fname, "w");
    + if (ofp == NULL) {
    + fprintf(stderr, "couldn't open %s\n", fname);
    + return -1;
    + }
    + fprintf(ofp, "# perf trace event handlers, "
    + "generated by perf trace -g python\n");
    +
    + fprintf(ofp, "# Licensed under the terms of the GNU GPL"
    + " License version 2\n\n");
    +
    + fprintf(ofp, "# The common_* event handler fields are the most useful "
    + "fields common to\n");
    +
    + fprintf(ofp, "# all events. They don't necessarily correspond to "
    + "the 'common_*' fields\n");
    +
    + fprintf(ofp, "# in the format files. Those fields not available as "
    + "handler params can\n");
    +
    + fprintf(ofp, "# be retrieved using Python functions of the form "
    + "common_*(context).\n");
    +
    + fprintf(ofp, "# See the perf-trace-python Documentation for the list "
    + "of available functions.\n\n");
    +
    + fprintf(ofp, "import os\n");
    + fprintf(ofp, "import sys\n\n");
    +
    + fprintf(ofp, "sys.path.append(os.environ['PERF_EXEC_PATH'] + \\\n");
    + fprintf(ofp, "\t'/scripts/python/Perf-Trace-Util/lib/Perf/Trace')\n");
    + fprintf(ofp, "\nfrom perf_trace_context import *\n");
    + fprintf(ofp, "from Core import *\n\n\n");
    +
    + fprintf(ofp, "def trace_begin():\n");
    + fprintf(ofp, "\tprint \"in trace_begin\"\n\n");
    +
    + fprintf(ofp, "def trace_end():\n");
    + fprintf(ofp, "\tprint \"in trace_end\"\n\n");
    +
    + while ((event = trace_find_next_event(event))) {
    + fprintf(ofp, "def %s__%s(", event->system, event->name);
    + fprintf(ofp, "event_name, ");
    + fprintf(ofp, "context, ");
    + fprintf(ofp, "common_cpu,\n");
    + fprintf(ofp, "\tcommon_secs, ");
    + fprintf(ofp, "common_nsecs, ");
    + fprintf(ofp, "common_pid, ");
    + fprintf(ofp, "common_comm,\n\t");
    +
    + not_first = 0;
    + count = 0;
    +
    + for (f = event->format.fields; f; f = f->next) {
    + if (not_first++)
    + fprintf(ofp, ", ");
    + if (++count % 5 == 0)
    + fprintf(ofp, "\n\t");
    +
    + fprintf(ofp, "%s", f->name);
    + }
    + fprintf(ofp, "):\n");
    +
    + fprintf(ofp, "\t\tprint_header(event_name, common_cpu, "
    + "common_secs, common_nsecs,\n\t\t\t"
    + "common_pid, common_comm)\n\n");
    +
    + fprintf(ofp, "\t\tprint \"");
    +
    + not_first = 0;
    + count = 0;
    +
    + for (f = event->format.fields; f; f = f->next) {
    + if (not_first++)
    + fprintf(ofp, ", ");
    + if (count && count % 3 == 0) {
    + fprintf(ofp, "\" \\\n\t\t\"");
    + }
    + count++;
    +
    + fprintf(ofp, "%s=", f->name);
    + if (f->flags & FIELD_IS_STRING ||
    + f->flags & FIELD_IS_FLAG ||
    + f->flags & FIELD_IS_SYMBOLIC)
    + fprintf(ofp, "%%s");
    + else if (f->flags & FIELD_IS_SIGNED)
    + fprintf(ofp, "%%d");
    + else
    + fprintf(ofp, "%%u");
    + }
    +
    + fprintf(ofp, "\\n\" %% \\\n\t\t(");
    +
    + not_first = 0;
    + count = 0;
    +
    + for (f = event->format.fields; f; f = f->next) {
    + if (not_first++)
    + fprintf(ofp, ", ");
    +
    + if (++count % 5 == 0)
    + fprintf(ofp, "\n\t\t");
    +
    + if (f->flags & FIELD_IS_FLAG) {
    + if ((count - 1) % 5 != 0) {
    + fprintf(ofp, "\n\t\t");
    + count = 4;
    + }
    + fprintf(ofp, "flag_str(\"");
    + fprintf(ofp, "%s__%s\", ", event->system,
    + event->name);
    + fprintf(ofp, "\"%s\", %s)", f->name,
    + f->name);
    + } else if (f->flags & FIELD_IS_SYMBOLIC) {
    + if ((count - 1) % 5 != 0) {
    + fprintf(ofp, "\n\t\t");
    + count = 4;
    + }
    + fprintf(ofp, "symbol_str(\"");
    + fprintf(ofp, "%s__%s\", ", event->system,
    + event->name);
    + fprintf(ofp, "\"%s\", %s)", f->name,
    + f->name);
    + } else
    + fprintf(ofp, "%s", f->name);
    + }
    +
    + fprintf(ofp, "),\n\n");
    + }
    +
    + fprintf(ofp, "def trace_unhandled(event_name, context, "
    + "common_cpu, common_secs, common_nsecs,\n\t\t"
    + "common_pid, common_comm):\n");
    +
    + fprintf(ofp, "\t\tprint_header(event_name, common_cpu, "
    + "common_secs, common_nsecs,\n\t\tcommon_pid, "
    + "common_comm)\n\n");
    +
    + fprintf(ofp, "def print_header("
    + "event_name, cpu, secs, nsecs, pid, comm):\n"
    + "\tprint \"%%-20s %%5u %%05u.%%09u %%8u %%-20s \" %% \\\n\t"
    + "(event_name, cpu, secs, nsecs, pid, comm),\n");
    +
    + fclose(ofp);
    +
    + fprintf(stderr, "generated Python script: %s\n", fname);
    +
    + return 0;
    +}
    +
    +struct scripting_ops python_scripting_ops = {
    + .name = "Python",
    + .start_script = python_start_script,
    + .stop_script = python_stop_script,
    + .process_event = python_process_event,
    + .generate_script = python_generate_script,
    +};
    diff --git a/tools/perf/util/trace-event-scripting.c b/tools/perf/util/trace-event-scripting.c
    index 9e37196..7ea983a 100644
    --- a/tools/perf/util/trace-event-scripting.c
    +++ b/tools/perf/util/trace-event-scripting.c
    @@ -44,6 +44,67 @@ static void process_event_unsupported(int cpu __unused,
    {
    }

    +static void print_python_unsupported_msg(void)
    +{
    + fprintf(stderr, "Python scripting not supported."
    + " Install libpython and rebuild perf to enable it.\n"
    + "For example:\n # apt-get install python-dev (ubuntu)"
    + "\n # yum install python-devel (Fedora)"
    + "\n etc.\n");
    +}
    +
    +static int python_start_script_unsupported(const char *script __unused,
    + int argc __unused,
    + const char **argv __unused)
    +{
    + print_python_unsupported_msg();
    +
    + return -1;
    +}
    +
    +static int python_generate_script_unsupported(const char *outfile __unused)
    +{
    + print_python_unsupported_msg();
    +
    + return -1;
    +}
    +
    +struct scripting_ops python_scripting_unsupported_ops = {
    + .name = "Python",
    + .start_script = python_start_script_unsupported,
    + .stop_script = stop_script_unsupported,
    + .process_event = process_event_unsupported,
    + .generate_script = python_generate_script_unsupported,
    +};
    +
    +static void register_python_scripting(struct scripting_ops *scripting_ops)
    +{
    + int err;
    + err = script_spec_register("Python", scripting_ops);
    + if (err)
    + die("error registering Python script extension");
    +
    + err = script_spec_register("py", scripting_ops);
    + if (err)
    + die("error registering py script extension");
    +
    + scripting_context = malloc(sizeof(struct scripting_context));
    +}
    +
    +#ifdef NO_LIBPYTHON
    +void setup_python_scripting(void)
    +{
    + register_python_scripting(&python_scripting_unsupported_ops);
    +}
    +#else
    +struct scripting_ops python_scripting_ops;
    +
    +void setup_python_scripting(void)
    +{
    + register_python_scripting(&python_scripting_ops);
    +}
    +#endif
    +
    static void print_perl_unsupported_msg(void)
    {
    fprintf(stderr, "Perl scripting not supported."
    diff --git a/tools/perf/util/trace-event.h b/tools/perf/util/trace-event.h
    index aaf2da2..c3269b9 100644
    --- a/tools/perf/util/trace-event.h
    +++ b/tools/perf/util/trace-event.h
    @@ -280,6 +280,7 @@ struct scripting_ops {
    int script_spec_register(const char *spec, struct scripting_ops *ops);

    void setup_perl_scripting(void);
    +void setup_python_scripting(void);

    struct scripting_context {
    void *event_data;
    --
    1.6.2.3


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      Last update: 2010-02-25 04:47    [W:0.077 / U:1.308 seconds]
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