662 lines
15 KiB
C
662 lines
15 KiB
C
/*
|
|
* trace-event-perl. Feed perf trace events to an embedded Perl interpreter.
|
|
*
|
|
* Copyright (C) 2009 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 <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <ctype.h>
|
|
#include <errno.h>
|
|
|
|
#include "../perf.h"
|
|
#include "util.h"
|
|
#include "trace-event.h"
|
|
#include "trace-event-perl.h"
|
|
|
|
void xs_init(pTHX);
|
|
|
|
void xs_init(pTHX)
|
|
{
|
|
const char *file = __FILE__;
|
|
dXSUB_SYS;
|
|
|
|
newXS("Perf::Trace::Context::bootstrap", boot_Perf__Trace__Context,
|
|
file);
|
|
newXS("DynaLoader::boot_DynaLoader", boot_DynaLoader, file);
|
|
}
|
|
|
|
INTERP my_perl;
|
|
|
|
#define FTRACE_MAX_EVENT \
|
|
((1 << (sizeof(unsigned short) * 8)) - 1)
|
|
|
|
struct event *events[FTRACE_MAX_EVENT];
|
|
|
|
static struct scripting_context *scripting_context;
|
|
|
|
static char *cur_field_name;
|
|
static int zero_flag_atom;
|
|
|
|
static void define_symbolic_value(const char *ev_name,
|
|
const char *field_name,
|
|
const char *field_value,
|
|
const char *field_str)
|
|
{
|
|
unsigned long long value;
|
|
dSP;
|
|
|
|
value = eval_flag(field_value);
|
|
|
|
ENTER;
|
|
SAVETMPS;
|
|
PUSHMARK(SP);
|
|
|
|
XPUSHs(sv_2mortal(newSVpv(ev_name, 0)));
|
|
XPUSHs(sv_2mortal(newSVpv(field_name, 0)));
|
|
XPUSHs(sv_2mortal(newSVuv(value)));
|
|
XPUSHs(sv_2mortal(newSVpv(field_str, 0)));
|
|
|
|
PUTBACK;
|
|
if (get_cv("main::define_symbolic_value", 0))
|
|
call_pv("main::define_symbolic_value", G_SCALAR);
|
|
SPAGAIN;
|
|
PUTBACK;
|
|
FREETMPS;
|
|
LEAVE;
|
|
}
|
|
|
|
static void define_symbolic_values(struct print_flag_sym *field,
|
|
const char *ev_name,
|
|
const char *field_name)
|
|
{
|
|
define_symbolic_value(ev_name, field_name, field->value, field->str);
|
|
if (field->next)
|
|
define_symbolic_values(field->next, ev_name, field_name);
|
|
}
|
|
|
|
static void define_symbolic_field(const char *ev_name,
|
|
const char *field_name)
|
|
{
|
|
dSP;
|
|
|
|
ENTER;
|
|
SAVETMPS;
|
|
PUSHMARK(SP);
|
|
|
|
XPUSHs(sv_2mortal(newSVpv(ev_name, 0)));
|
|
XPUSHs(sv_2mortal(newSVpv(field_name, 0)));
|
|
|
|
PUTBACK;
|
|
if (get_cv("main::define_symbolic_field", 0))
|
|
call_pv("main::define_symbolic_field", G_SCALAR);
|
|
SPAGAIN;
|
|
PUTBACK;
|
|
FREETMPS;
|
|
LEAVE;
|
|
}
|
|
|
|
static void define_flag_value(const char *ev_name,
|
|
const char *field_name,
|
|
const char *field_value,
|
|
const char *field_str)
|
|
{
|
|
unsigned long long value;
|
|
dSP;
|
|
|
|
value = eval_flag(field_value);
|
|
|
|
ENTER;
|
|
SAVETMPS;
|
|
PUSHMARK(SP);
|
|
|
|
XPUSHs(sv_2mortal(newSVpv(ev_name, 0)));
|
|
XPUSHs(sv_2mortal(newSVpv(field_name, 0)));
|
|
XPUSHs(sv_2mortal(newSVuv(value)));
|
|
XPUSHs(sv_2mortal(newSVpv(field_str, 0)));
|
|
|
|
PUTBACK;
|
|
if (get_cv("main::define_flag_value", 0))
|
|
call_pv("main::define_flag_value", G_SCALAR);
|
|
SPAGAIN;
|
|
PUTBACK;
|
|
FREETMPS;
|
|
LEAVE;
|
|
}
|
|
|
|
static void define_flag_values(struct print_flag_sym *field,
|
|
const char *ev_name,
|
|
const char *field_name)
|
|
{
|
|
define_flag_value(ev_name, field_name, field->value, field->str);
|
|
if (field->next)
|
|
define_flag_values(field->next, ev_name, field_name);
|
|
}
|
|
|
|
static void define_flag_field(const char *ev_name,
|
|
const char *field_name,
|
|
const char *delim)
|
|
{
|
|
dSP;
|
|
|
|
ENTER;
|
|
SAVETMPS;
|
|
PUSHMARK(SP);
|
|
|
|
XPUSHs(sv_2mortal(newSVpv(ev_name, 0)));
|
|
XPUSHs(sv_2mortal(newSVpv(field_name, 0)));
|
|
XPUSHs(sv_2mortal(newSVpv(delim, 0)));
|
|
|
|
PUTBACK;
|
|
if (get_cv("main::define_flag_field", 0))
|
|
call_pv("main::define_flag_field", G_SCALAR);
|
|
SPAGAIN;
|
|
PUTBACK;
|
|
FREETMPS;
|
|
LEAVE;
|
|
}
|
|
|
|
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_flag_value(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_flag_field(ev_name, cur_field_name, args->flags.delim);
|
|
define_flag_values(args->flags.flags, ev_name, cur_field_name);
|
|
break;
|
|
case PRINT_SYMBOL:
|
|
define_event_symbols(event, ev_name, args->symbol.field);
|
|
define_symbolic_field(ev_name, cur_field_name);
|
|
define_symbolic_values(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;
|
|
}
|
|
|
|
int common_pc(struct scripting_context *context)
|
|
{
|
|
int pc;
|
|
|
|
pc = parse_common_pc(context->event_data);
|
|
|
|
return pc;
|
|
}
|
|
|
|
int common_flags(struct scripting_context *context)
|
|
{
|
|
int flags;
|
|
|
|
flags = parse_common_flags(context->event_data);
|
|
|
|
return flags;
|
|
}
|
|
|
|
int common_lock_depth(struct scripting_context *context)
|
|
{
|
|
int lock_depth;
|
|
|
|
lock_depth = parse_common_lock_depth(context->event_data);
|
|
|
|
return lock_depth;
|
|
}
|
|
|
|
static void perl_process_event(int cpu, void *data,
|
|
int size __unused,
|
|
unsigned long long nsecs, char *comm)
|
|
{
|
|
struct format_field *field;
|
|
static char handler[256];
|
|
unsigned long long val;
|
|
unsigned long s, ns;
|
|
struct event *event;
|
|
int type;
|
|
int pid;
|
|
|
|
dSP;
|
|
|
|
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, "%s::%s", event->system, event->name);
|
|
|
|
s = nsecs / NSECS_PER_SEC;
|
|
ns = nsecs - s * NSECS_PER_SEC;
|
|
|
|
scripting_context->event_data = data;
|
|
|
|
ENTER;
|
|
SAVETMPS;
|
|
PUSHMARK(SP);
|
|
|
|
XPUSHs(sv_2mortal(newSVpv(handler, 0)));
|
|
XPUSHs(sv_2mortal(newSViv(PTR2IV(scripting_context))));
|
|
XPUSHs(sv_2mortal(newSVuv(cpu)));
|
|
XPUSHs(sv_2mortal(newSVuv(s)));
|
|
XPUSHs(sv_2mortal(newSVuv(ns)));
|
|
XPUSHs(sv_2mortal(newSViv(pid)));
|
|
XPUSHs(sv_2mortal(newSVpv(comm, 0)));
|
|
|
|
/* common fields other than pid can be accessed via xsub fns */
|
|
|
|
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;
|
|
XPUSHs(sv_2mortal(newSVpv((char *)data + offset, 0)));
|
|
} else { /* FIELD_IS_NUMERIC */
|
|
val = read_size(data + field->offset, field->size);
|
|
if (field->flags & FIELD_IS_SIGNED) {
|
|
XPUSHs(sv_2mortal(newSViv(val)));
|
|
} else {
|
|
XPUSHs(sv_2mortal(newSVuv(val)));
|
|
}
|
|
}
|
|
}
|
|
|
|
PUTBACK;
|
|
|
|
if (get_cv(handler, 0))
|
|
call_pv(handler, G_SCALAR);
|
|
else if (get_cv("main::trace_unhandled", 0)) {
|
|
XPUSHs(sv_2mortal(newSVpv(handler, 0)));
|
|
XPUSHs(sv_2mortal(newSViv(PTR2IV(scripting_context))));
|
|
XPUSHs(sv_2mortal(newSVuv(cpu)));
|
|
XPUSHs(sv_2mortal(newSVuv(nsecs)));
|
|
XPUSHs(sv_2mortal(newSViv(pid)));
|
|
XPUSHs(sv_2mortal(newSVpv(comm, 0)));
|
|
call_pv("main::trace_unhandled", G_SCALAR);
|
|
}
|
|
SPAGAIN;
|
|
PUTBACK;
|
|
FREETMPS;
|
|
LEAVE;
|
|
}
|
|
|
|
static void run_start_sub(void)
|
|
{
|
|
dSP; /* access to Perl stack */
|
|
PUSHMARK(SP);
|
|
|
|
if (get_cv("main::trace_begin", 0))
|
|
call_pv("main::trace_begin", G_DISCARD | G_NOARGS);
|
|
}
|
|
|
|
/*
|
|
* Start trace script
|
|
*/
|
|
static int perl_start_script(const char *script, int argc, const char **argv)
|
|
{
|
|
const char **command_line;
|
|
int i, err = 0;
|
|
|
|
command_line = malloc((argc + 2) * sizeof(const char *));
|
|
command_line[0] = "";
|
|
command_line[1] = script;
|
|
for (i = 2; i < argc + 2; i++)
|
|
command_line[i] = argv[i - 2];
|
|
|
|
my_perl = perl_alloc();
|
|
perl_construct(my_perl);
|
|
|
|
if (perl_parse(my_perl, xs_init, argc + 2, (char **)command_line,
|
|
(char **)NULL)) {
|
|
err = -1;
|
|
goto error;
|
|
}
|
|
|
|
if (perl_run(my_perl)) {
|
|
err = -1;
|
|
goto error;
|
|
}
|
|
|
|
if (SvTRUE(ERRSV)) {
|
|
err = -1;
|
|
goto error;
|
|
}
|
|
|
|
run_start_sub();
|
|
|
|
free(command_line);
|
|
fprintf(stderr, "perf trace started with Perl script %s\n\n", script);
|
|
return 0;
|
|
error:
|
|
perl_free(my_perl);
|
|
free(command_line);
|
|
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Stop trace script
|
|
*/
|
|
static int perl_stop_script(void)
|
|
{
|
|
dSP; /* access to Perl stack */
|
|
PUSHMARK(SP);
|
|
|
|
if (get_cv("main::trace_end", 0))
|
|
call_pv("main::trace_end", G_DISCARD | G_NOARGS);
|
|
|
|
perl_destruct(my_perl);
|
|
perl_free(my_perl);
|
|
|
|
fprintf(stderr, "\nperf trace Perl script stopped\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int perl_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.pl", 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 perl\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 Perl functions of the form "
|
|
"common_*($context).\n");
|
|
|
|
fprintf(ofp, "# See Context.pm for the list of available "
|
|
"functions.\n\n");
|
|
|
|
fprintf(ofp, "use lib \"$ENV{'PERF_EXEC_PATH'}/scripts/perl/"
|
|
"Perf-Trace-Util/lib\";\n");
|
|
|
|
fprintf(ofp, "use lib \"./Perf-Trace-Util/lib\";\n");
|
|
fprintf(ofp, "use Perf::Trace::Core;\n");
|
|
fprintf(ofp, "use Perf::Trace::Context;\n");
|
|
fprintf(ofp, "use Perf::Trace::Util;\n\n");
|
|
|
|
fprintf(ofp, "sub trace_begin\n{\n\t# optional\n}\n\n");
|
|
fprintf(ofp, "sub trace_end\n{\n\t# optional\n}\n\n");
|
|
|
|
while ((event = trace_find_next_event(event))) {
|
|
fprintf(ofp, "sub %s::%s\n{\n", event->system, event->name);
|
|
fprintf(ofp, "\tmy (");
|
|
|
|
fprintf(ofp, "$event_name, ");
|
|
fprintf(ofp, "$context, ");
|
|
fprintf(ofp, "$common_cpu, ");
|
|
fprintf(ofp, "$common_secs, ");
|
|
fprintf(ofp, "$common_nsecs,\n");
|
|
fprintf(ofp, "\t $common_pid, ");
|
|
fprintf(ofp, "$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, "$%s", f->name);
|
|
}
|
|
fprintf(ofp, ") = @_;\n\n");
|
|
|
|
fprintf(ofp, "\tprint_header($event_name, $common_cpu, "
|
|
"$common_secs, $common_nsecs,\n\t "
|
|
"$common_pid, $common_comm);\n\n");
|
|
|
|
fprintf(ofp, "\tprintf(\"");
|
|
|
|
not_first = 0;
|
|
count = 0;
|
|
|
|
for (f = event->format.fields; f; f = f->next) {
|
|
if (not_first++)
|
|
fprintf(ofp, ", ");
|
|
if (count && count % 4 == 0) {
|
|
fprintf(ofp, "\".\n\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 ");
|
|
|
|
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 ");
|
|
|
|
if (f->flags & FIELD_IS_FLAG) {
|
|
if ((count - 1) % 5 != 0) {
|
|
fprintf(ofp, "\n\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 ");
|
|
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");
|
|
fprintf(ofp, "}\n\n");
|
|
}
|
|
|
|
fprintf(ofp, "sub trace_unhandled\n{\n\tmy ($event_name, $context, "
|
|
"$common_cpu, $common_secs, $common_nsecs,\n\t "
|
|
"$common_pid, $common_comm) = @_;\n\n");
|
|
|
|
fprintf(ofp, "\tprint_header($event_name, $common_cpu, "
|
|
"$common_secs, $common_nsecs,\n\t $common_pid, "
|
|
"$common_comm);\n}\n\n");
|
|
|
|
fprintf(ofp, "sub print_header\n{\n"
|
|
"\tmy ($event_name, $cpu, $secs, $nsecs, $pid, $comm) = @_;\n\n"
|
|
"\tprintf(\"%%-20s %%5u %%05u.%%09u %%8u %%-20s \",\n\t "
|
|
"$event_name, $cpu, $secs, $nsecs, $pid, $comm);\n}");
|
|
|
|
fclose(ofp);
|
|
|
|
fprintf(stderr, "generated Perl script: %s\n", fname);
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct scripting_ops perl_scripting_ops = {
|
|
.name = "Perl",
|
|
.start_script = perl_start_script,
|
|
.stop_script = perl_stop_script,
|
|
.process_event = perl_process_event,
|
|
.generate_script = perl_generate_script,
|
|
};
|
|
|
|
static void print_unsupported_msg(void)
|
|
{
|
|
fprintf(stderr, "Perl scripting not supported."
|
|
" Install libperl and rebuild perf to enable it.\n"
|
|
"For example:\n # apt-get install libperl-dev (ubuntu)"
|
|
"\n # yum install perl-ExtUtils-Embed (Fedora)"
|
|
"\n etc.\n");
|
|
}
|
|
|
|
static int perl_start_script_unsupported(const char *script __unused,
|
|
int argc __unused,
|
|
const char **argv __unused)
|
|
{
|
|
print_unsupported_msg();
|
|
|
|
return -1;
|
|
}
|
|
|
|
static int perl_stop_script_unsupported(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void perl_process_event_unsupported(int cpu __unused,
|
|
void *data __unused,
|
|
int size __unused,
|
|
unsigned long long nsecs __unused,
|
|
char *comm __unused)
|
|
{
|
|
}
|
|
|
|
static int perl_generate_script_unsupported(const char *outfile __unused)
|
|
{
|
|
print_unsupported_msg();
|
|
|
|
return -1;
|
|
}
|
|
|
|
struct scripting_ops perl_scripting_unsupported_ops = {
|
|
.name = "Perl",
|
|
.start_script = perl_start_script_unsupported,
|
|
.stop_script = perl_stop_script_unsupported,
|
|
.process_event = perl_process_event_unsupported,
|
|
.generate_script = perl_generate_script_unsupported,
|
|
};
|
|
|
|
static void register_perl_scripting(struct scripting_ops *scripting_ops)
|
|
{
|
|
int err;
|
|
err = script_spec_register("Perl", scripting_ops);
|
|
if (err)
|
|
die("error registering Perl script extension");
|
|
|
|
err = script_spec_register("pl", scripting_ops);
|
|
if (err)
|
|
die("error registering pl script extension");
|
|
|
|
scripting_context = malloc(sizeof(struct scripting_context));
|
|
}
|
|
|
|
#ifdef NO_LIBPERL
|
|
void setup_perl_scripting(void)
|
|
{
|
|
register_perl_scripting(&perl_scripting_unsupported_ops);
|
|
}
|
|
#else
|
|
void setup_perl_scripting(void)
|
|
{
|
|
register_perl_scripting(&perl_scripting_ops);
|
|
}
|
|
#endif
|