633 строки
15 KiB
C
633 строки
15 KiB
C
/*
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* trace-event-perl. Feed perf script events to an embedded Perl interpreter.
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*
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* Copyright (C) 2009 Tom Zanussi <tzanussi@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <errno.h>
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#include <linux/bitmap.h>
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#include "../util.h"
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#include <EXTERN.h>
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#include <perl.h>
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#include "../../perf.h"
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#include "../thread.h"
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#include "../event.h"
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#include "../trace-event.h"
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#include "../evsel.h"
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#include "../debug.h"
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void boot_Perf__Trace__Context(pTHX_ CV *cv);
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void boot_DynaLoader(pTHX_ CV *cv);
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typedef PerlInterpreter * INTERP;
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void xs_init(pTHX);
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void xs_init(pTHX)
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{
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const char *file = __FILE__;
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dXSUB_SYS;
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newXS("Perf::Trace::Context::bootstrap", boot_Perf__Trace__Context,
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file);
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newXS("DynaLoader::boot_DynaLoader", boot_DynaLoader, file);
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}
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INTERP my_perl;
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#define FTRACE_MAX_EVENT \
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((1 << (sizeof(unsigned short) * 8)) - 1)
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static DECLARE_BITMAP(events_defined, FTRACE_MAX_EVENT);
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extern struct scripting_context *scripting_context;
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static char *cur_field_name;
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static int zero_flag_atom;
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static void define_symbolic_value(const char *ev_name,
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const char *field_name,
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const char *field_value,
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const char *field_str)
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{
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unsigned long long value;
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dSP;
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value = eval_flag(field_value);
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ENTER;
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SAVETMPS;
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PUSHMARK(SP);
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XPUSHs(sv_2mortal(newSVpv(ev_name, 0)));
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XPUSHs(sv_2mortal(newSVpv(field_name, 0)));
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XPUSHs(sv_2mortal(newSVuv(value)));
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XPUSHs(sv_2mortal(newSVpv(field_str, 0)));
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PUTBACK;
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if (get_cv("main::define_symbolic_value", 0))
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call_pv("main::define_symbolic_value", G_SCALAR);
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SPAGAIN;
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PUTBACK;
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FREETMPS;
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LEAVE;
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}
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static void define_symbolic_values(struct print_flag_sym *field,
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const char *ev_name,
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const char *field_name)
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{
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define_symbolic_value(ev_name, field_name, field->value, field->str);
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if (field->next)
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define_symbolic_values(field->next, ev_name, field_name);
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}
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static void define_symbolic_field(const char *ev_name,
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const char *field_name)
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{
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dSP;
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ENTER;
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SAVETMPS;
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PUSHMARK(SP);
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XPUSHs(sv_2mortal(newSVpv(ev_name, 0)));
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XPUSHs(sv_2mortal(newSVpv(field_name, 0)));
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PUTBACK;
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if (get_cv("main::define_symbolic_field", 0))
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call_pv("main::define_symbolic_field", G_SCALAR);
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SPAGAIN;
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PUTBACK;
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FREETMPS;
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LEAVE;
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}
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static void define_flag_value(const char *ev_name,
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const char *field_name,
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const char *field_value,
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const char *field_str)
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{
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unsigned long long value;
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dSP;
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value = eval_flag(field_value);
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ENTER;
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SAVETMPS;
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PUSHMARK(SP);
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XPUSHs(sv_2mortal(newSVpv(ev_name, 0)));
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XPUSHs(sv_2mortal(newSVpv(field_name, 0)));
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XPUSHs(sv_2mortal(newSVuv(value)));
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XPUSHs(sv_2mortal(newSVpv(field_str, 0)));
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PUTBACK;
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if (get_cv("main::define_flag_value", 0))
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call_pv("main::define_flag_value", G_SCALAR);
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SPAGAIN;
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PUTBACK;
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FREETMPS;
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LEAVE;
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}
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static void define_flag_values(struct print_flag_sym *field,
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const char *ev_name,
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const char *field_name)
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{
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define_flag_value(ev_name, field_name, field->value, field->str);
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if (field->next)
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define_flag_values(field->next, ev_name, field_name);
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}
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static void define_flag_field(const char *ev_name,
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const char *field_name,
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const char *delim)
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{
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dSP;
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ENTER;
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SAVETMPS;
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PUSHMARK(SP);
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XPUSHs(sv_2mortal(newSVpv(ev_name, 0)));
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XPUSHs(sv_2mortal(newSVpv(field_name, 0)));
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XPUSHs(sv_2mortal(newSVpv(delim, 0)));
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PUTBACK;
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if (get_cv("main::define_flag_field", 0))
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call_pv("main::define_flag_field", G_SCALAR);
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SPAGAIN;
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PUTBACK;
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FREETMPS;
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LEAVE;
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}
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static void define_event_symbols(struct event_format *event,
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const char *ev_name,
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struct print_arg *args)
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{
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switch (args->type) {
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case PRINT_NULL:
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break;
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case PRINT_ATOM:
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define_flag_value(ev_name, cur_field_name, "0",
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args->atom.atom);
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zero_flag_atom = 0;
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break;
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case PRINT_FIELD:
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free(cur_field_name);
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cur_field_name = strdup(args->field.name);
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break;
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case PRINT_FLAGS:
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define_event_symbols(event, ev_name, args->flags.field);
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define_flag_field(ev_name, cur_field_name, args->flags.delim);
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define_flag_values(args->flags.flags, ev_name, cur_field_name);
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break;
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case PRINT_SYMBOL:
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define_event_symbols(event, ev_name, args->symbol.field);
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define_symbolic_field(ev_name, cur_field_name);
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define_symbolic_values(args->symbol.symbols, ev_name,
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cur_field_name);
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break;
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case PRINT_HEX:
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define_event_symbols(event, ev_name, args->hex.field);
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define_event_symbols(event, ev_name, args->hex.size);
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break;
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case PRINT_INT_ARRAY:
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define_event_symbols(event, ev_name, args->int_array.field);
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define_event_symbols(event, ev_name, args->int_array.count);
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define_event_symbols(event, ev_name, args->int_array.el_size);
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break;
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case PRINT_BSTRING:
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case PRINT_DYNAMIC_ARRAY:
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case PRINT_STRING:
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case PRINT_BITMASK:
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break;
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case PRINT_TYPE:
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define_event_symbols(event, ev_name, args->typecast.item);
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break;
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case PRINT_OP:
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if (strcmp(args->op.op, ":") == 0)
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zero_flag_atom = 1;
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define_event_symbols(event, ev_name, args->op.left);
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define_event_symbols(event, ev_name, args->op.right);
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break;
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case PRINT_FUNC:
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default:
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pr_err("Unsupported print arg type\n");
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/* we should warn... */
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return;
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}
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if (args->next)
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define_event_symbols(event, ev_name, args->next);
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}
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static void perl_process_tracepoint(struct perf_sample *sample,
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struct perf_evsel *evsel,
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struct thread *thread)
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{
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struct event_format *event = evsel->tp_format;
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struct format_field *field;
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static char handler[256];
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unsigned long long val;
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unsigned long s, ns;
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int pid;
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int cpu = sample->cpu;
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void *data = sample->raw_data;
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unsigned long long nsecs = sample->time;
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const char *comm = thread__comm_str(thread);
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dSP;
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if (evsel->attr.type != PERF_TYPE_TRACEPOINT)
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return;
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if (!event)
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die("ug! no event found for type %" PRIu64, (u64)evsel->attr.config);
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pid = raw_field_value(event, "common_pid", data);
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sprintf(handler, "%s::%s", event->system, event->name);
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if (!test_and_set_bit(event->id, events_defined))
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define_event_symbols(event, handler, event->print_fmt.args);
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s = nsecs / NSECS_PER_SEC;
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ns = nsecs - s * NSECS_PER_SEC;
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scripting_context->event_data = data;
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scripting_context->pevent = evsel->tp_format->pevent;
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ENTER;
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SAVETMPS;
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PUSHMARK(SP);
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XPUSHs(sv_2mortal(newSVpv(handler, 0)));
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XPUSHs(sv_2mortal(newSViv(PTR2IV(scripting_context))));
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XPUSHs(sv_2mortal(newSVuv(cpu)));
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XPUSHs(sv_2mortal(newSVuv(s)));
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XPUSHs(sv_2mortal(newSVuv(ns)));
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XPUSHs(sv_2mortal(newSViv(pid)));
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XPUSHs(sv_2mortal(newSVpv(comm, 0)));
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/* common fields other than pid can be accessed via xsub fns */
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for (field = event->format.fields; field; field = field->next) {
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if (field->flags & FIELD_IS_STRING) {
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int offset;
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if (field->flags & FIELD_IS_DYNAMIC) {
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offset = *(int *)(data + field->offset);
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offset &= 0xffff;
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} else
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offset = field->offset;
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XPUSHs(sv_2mortal(newSVpv((char *)data + offset, 0)));
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} else { /* FIELD_IS_NUMERIC */
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val = read_size(event, data + field->offset,
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field->size);
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if (field->flags & FIELD_IS_SIGNED) {
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XPUSHs(sv_2mortal(newSViv(val)));
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} else {
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XPUSHs(sv_2mortal(newSVuv(val)));
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}
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}
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}
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PUTBACK;
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if (get_cv(handler, 0))
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call_pv(handler, G_SCALAR);
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else if (get_cv("main::trace_unhandled", 0)) {
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XPUSHs(sv_2mortal(newSVpv(handler, 0)));
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XPUSHs(sv_2mortal(newSViv(PTR2IV(scripting_context))));
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XPUSHs(sv_2mortal(newSVuv(cpu)));
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XPUSHs(sv_2mortal(newSVuv(nsecs)));
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XPUSHs(sv_2mortal(newSViv(pid)));
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XPUSHs(sv_2mortal(newSVpv(comm, 0)));
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call_pv("main::trace_unhandled", G_SCALAR);
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}
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SPAGAIN;
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PUTBACK;
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FREETMPS;
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LEAVE;
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}
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static void perl_process_event_generic(union perf_event *event,
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struct perf_sample *sample,
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struct perf_evsel *evsel)
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{
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dSP;
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if (!get_cv("process_event", 0))
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return;
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ENTER;
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SAVETMPS;
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PUSHMARK(SP);
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XPUSHs(sv_2mortal(newSVpvn((const char *)event, event->header.size)));
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XPUSHs(sv_2mortal(newSVpvn((const char *)&evsel->attr, sizeof(evsel->attr))));
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XPUSHs(sv_2mortal(newSVpvn((const char *)sample, sizeof(*sample))));
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XPUSHs(sv_2mortal(newSVpvn((const char *)sample->raw_data, sample->raw_size)));
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PUTBACK;
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call_pv("process_event", G_SCALAR);
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SPAGAIN;
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PUTBACK;
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FREETMPS;
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LEAVE;
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}
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static void perl_process_event(union perf_event *event,
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struct perf_sample *sample,
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struct perf_evsel *evsel,
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struct addr_location *al)
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{
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perl_process_tracepoint(sample, evsel, al->thread);
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perl_process_event_generic(event, sample, evsel);
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}
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static void run_start_sub(void)
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{
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dSP; /* access to Perl stack */
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PUSHMARK(SP);
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if (get_cv("main::trace_begin", 0))
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call_pv("main::trace_begin", G_DISCARD | G_NOARGS);
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}
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/*
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* Start trace script
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*/
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static int perl_start_script(const char *script, int argc, const char **argv)
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{
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const char **command_line;
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int i, err = 0;
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command_line = malloc((argc + 2) * sizeof(const char *));
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command_line[0] = "";
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command_line[1] = script;
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for (i = 2; i < argc + 2; i++)
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command_line[i] = argv[i - 2];
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my_perl = perl_alloc();
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perl_construct(my_perl);
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if (perl_parse(my_perl, xs_init, argc + 2, (char **)command_line,
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(char **)NULL)) {
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err = -1;
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goto error;
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}
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if (perl_run(my_perl)) {
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err = -1;
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goto error;
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}
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if (SvTRUE(ERRSV)) {
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err = -1;
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goto error;
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}
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run_start_sub();
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free(command_line);
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return 0;
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error:
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perl_free(my_perl);
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free(command_line);
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return err;
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}
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static int perl_flush_script(void)
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{
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return 0;
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}
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/*
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* Stop trace script
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*/
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static int perl_stop_script(void)
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{
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dSP; /* access to Perl stack */
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PUSHMARK(SP);
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if (get_cv("main::trace_end", 0))
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call_pv("main::trace_end", G_DISCARD | G_NOARGS);
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perl_destruct(my_perl);
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perl_free(my_perl);
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return 0;
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}
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static int perl_generate_script(struct pevent *pevent, const char *outfile)
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{
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struct event_format *event = NULL;
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struct format_field *f;
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char fname[PATH_MAX];
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int not_first, count;
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FILE *ofp;
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sprintf(fname, "%s.pl", outfile);
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ofp = fopen(fname, "w");
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if (ofp == NULL) {
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fprintf(stderr, "couldn't open %s\n", fname);
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return -1;
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}
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fprintf(ofp, "# perf script event handlers, "
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"generated by perf script -g perl\n");
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fprintf(ofp, "# Licensed under the terms of the GNU GPL"
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" License version 2\n\n");
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fprintf(ofp, "# The common_* event handler fields are the most useful "
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"fields common to\n");
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fprintf(ofp, "# all events. They don't necessarily correspond to "
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"the 'common_*' fields\n");
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fprintf(ofp, "# in the format files. Those fields not available as "
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"handler params can\n");
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fprintf(ofp, "# be retrieved using Perl functions of the form "
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"common_*($context).\n");
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fprintf(ofp, "# See Context.pm for the list of available "
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"functions.\n\n");
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fprintf(ofp, "use lib \"$ENV{'PERF_EXEC_PATH'}/scripts/perl/"
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"Perf-Trace-Util/lib\";\n");
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fprintf(ofp, "use lib \"./Perf-Trace-Util/lib\";\n");
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fprintf(ofp, "use Perf::Trace::Core;\n");
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fprintf(ofp, "use Perf::Trace::Context;\n");
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fprintf(ofp, "use Perf::Trace::Util;\n\n");
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fprintf(ofp, "sub trace_begin\n{\n\t# optional\n}\n\n");
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fprintf(ofp, "sub trace_end\n{\n\t# optional\n}\n\n");
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while ((event = trace_find_next_event(pevent, event))) {
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fprintf(ofp, "sub %s::%s\n{\n", event->system, event->name);
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fprintf(ofp, "\tmy (");
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fprintf(ofp, "$event_name, ");
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fprintf(ofp, "$context, ");
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fprintf(ofp, "$common_cpu, ");
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fprintf(ofp, "$common_secs, ");
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fprintf(ofp, "$common_nsecs,\n");
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fprintf(ofp, "\t $common_pid, ");
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fprintf(ofp, "$common_comm,\n\t ");
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not_first = 0;
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count = 0;
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for (f = event->format.fields; f; f = f->next) {
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if (not_first++)
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fprintf(ofp, ", ");
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if (++count % 5 == 0)
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fprintf(ofp, "\n\t ");
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fprintf(ofp, "$%s", f->name);
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}
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fprintf(ofp, ") = @_;\n\n");
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fprintf(ofp, "\tprint_header($event_name, $common_cpu, "
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"$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}\n");
|
|
|
|
fprintf(ofp,
|
|
"\n# Packed byte string args of process_event():\n"
|
|
"#\n"
|
|
"# $event:\tunion perf_event\tutil/event.h\n"
|
|
"# $attr:\tstruct perf_event_attr\tlinux/perf_event.h\n"
|
|
"# $sample:\tstruct perf_sample\tutil/event.h\n"
|
|
"# $raw_data:\tperf_sample->raw_data\tutil/event.h\n"
|
|
"\n"
|
|
"sub process_event\n"
|
|
"{\n"
|
|
"\tmy ($event, $attr, $sample, $raw_data) = @_;\n"
|
|
"\n"
|
|
"\tmy @event\t= unpack(\"LSS\", $event);\n"
|
|
"\tmy @attr\t= unpack(\"LLQQQQQLLQQ\", $attr);\n"
|
|
"\tmy @sample\t= unpack(\"QLLQQQQQLL\", $sample);\n"
|
|
"\tmy @raw_data\t= unpack(\"C*\", $raw_data);\n"
|
|
"\n"
|
|
"\tuse Data::Dumper;\n"
|
|
"\tprint Dumper \\@event, \\@attr, \\@sample, \\@raw_data;\n"
|
|
"}\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,
|
|
.flush_script = perl_flush_script,
|
|
.stop_script = perl_stop_script,
|
|
.process_event = perl_process_event,
|
|
.generate_script = perl_generate_script,
|
|
};
|