508 lines
11 KiB
C
508 lines
11 KiB
C
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/*
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* db-export.c: Support for exporting data suitable for import to a database
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* Copyright (c) 2014, Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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*/
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#include <errno.h>
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#include "evsel.h"
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#include "machine.h"
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#include "thread.h"
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#include "comm.h"
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#include "symbol.h"
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#include "event.h"
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#include "util.h"
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#include "thread-stack.h"
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#include "callchain.h"
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#include "call-path.h"
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#include "db-export.h"
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struct deferred_export {
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struct list_head node;
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struct comm *comm;
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};
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static int db_export__deferred(struct db_export *dbe)
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{
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struct deferred_export *de;
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int err;
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while (!list_empty(&dbe->deferred)) {
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de = list_entry(dbe->deferred.next, struct deferred_export,
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node);
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err = dbe->export_comm(dbe, de->comm);
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list_del(&de->node);
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free(de);
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if (err)
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return err;
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}
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return 0;
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}
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static void db_export__free_deferred(struct db_export *dbe)
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{
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struct deferred_export *de;
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while (!list_empty(&dbe->deferred)) {
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de = list_entry(dbe->deferred.next, struct deferred_export,
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node);
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list_del(&de->node);
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free(de);
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}
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}
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static int db_export__defer_comm(struct db_export *dbe, struct comm *comm)
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{
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struct deferred_export *de;
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de = zalloc(sizeof(struct deferred_export));
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if (!de)
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return -ENOMEM;
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de->comm = comm;
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list_add_tail(&de->node, &dbe->deferred);
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return 0;
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}
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int db_export__init(struct db_export *dbe)
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{
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memset(dbe, 0, sizeof(struct db_export));
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INIT_LIST_HEAD(&dbe->deferred);
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return 0;
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}
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int db_export__flush(struct db_export *dbe)
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{
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return db_export__deferred(dbe);
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}
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void db_export__exit(struct db_export *dbe)
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{
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db_export__free_deferred(dbe);
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call_return_processor__free(dbe->crp);
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dbe->crp = NULL;
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}
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int db_export__evsel(struct db_export *dbe, struct perf_evsel *evsel)
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{
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if (evsel->db_id)
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return 0;
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evsel->db_id = ++dbe->evsel_last_db_id;
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if (dbe->export_evsel)
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return dbe->export_evsel(dbe, evsel);
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return 0;
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}
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int db_export__machine(struct db_export *dbe, struct machine *machine)
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{
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if (machine->db_id)
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return 0;
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machine->db_id = ++dbe->machine_last_db_id;
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if (dbe->export_machine)
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return dbe->export_machine(dbe, machine);
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return 0;
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}
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int db_export__thread(struct db_export *dbe, struct thread *thread,
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struct machine *machine, struct comm *comm)
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{
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struct thread *main_thread;
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u64 main_thread_db_id = 0;
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int err;
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if (thread->db_id)
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return 0;
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thread->db_id = ++dbe->thread_last_db_id;
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if (thread->pid_ != -1) {
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if (thread->pid_ == thread->tid) {
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main_thread = thread;
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} else {
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main_thread = machine__findnew_thread(machine,
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thread->pid_,
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thread->pid_);
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if (!main_thread)
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return -ENOMEM;
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err = db_export__thread(dbe, main_thread, machine,
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comm);
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if (err)
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goto out_put;
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if (comm) {
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err = db_export__comm_thread(dbe, comm, thread);
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if (err)
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goto out_put;
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}
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}
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main_thread_db_id = main_thread->db_id;
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if (main_thread != thread)
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thread__put(main_thread);
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}
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if (dbe->export_thread)
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return dbe->export_thread(dbe, thread, main_thread_db_id,
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machine);
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return 0;
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out_put:
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thread__put(main_thread);
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return err;
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}
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int db_export__comm(struct db_export *dbe, struct comm *comm,
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struct thread *main_thread)
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{
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int err;
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if (comm->db_id)
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return 0;
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comm->db_id = ++dbe->comm_last_db_id;
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if (dbe->export_comm) {
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if (main_thread->comm_set)
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err = dbe->export_comm(dbe, comm);
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else
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err = db_export__defer_comm(dbe, comm);
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if (err)
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return err;
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}
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return db_export__comm_thread(dbe, comm, main_thread);
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}
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int db_export__comm_thread(struct db_export *dbe, struct comm *comm,
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struct thread *thread)
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{
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u64 db_id;
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db_id = ++dbe->comm_thread_last_db_id;
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if (dbe->export_comm_thread)
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return dbe->export_comm_thread(dbe, db_id, comm, thread);
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return 0;
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}
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int db_export__dso(struct db_export *dbe, struct dso *dso,
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struct machine *machine)
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{
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if (dso->db_id)
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return 0;
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dso->db_id = ++dbe->dso_last_db_id;
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if (dbe->export_dso)
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return dbe->export_dso(dbe, dso, machine);
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return 0;
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}
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int db_export__symbol(struct db_export *dbe, struct symbol *sym,
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struct dso *dso)
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{
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u64 *sym_db_id = symbol__priv(sym);
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if (*sym_db_id)
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return 0;
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*sym_db_id = ++dbe->symbol_last_db_id;
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if (dbe->export_symbol)
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return dbe->export_symbol(dbe, sym, dso);
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return 0;
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}
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static int db_ids_from_al(struct db_export *dbe, struct addr_location *al,
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u64 *dso_db_id, u64 *sym_db_id, u64 *offset)
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{
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int err;
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if (al->map) {
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struct dso *dso = al->map->dso;
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err = db_export__dso(dbe, dso, al->machine);
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if (err)
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return err;
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*dso_db_id = dso->db_id;
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if (!al->sym) {
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al->sym = symbol__new(al->addr, 0, 0, 0, "unknown");
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if (al->sym)
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dso__insert_symbol(dso, al->sym);
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}
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if (al->sym) {
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u64 *db_id = symbol__priv(al->sym);
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err = db_export__symbol(dbe, al->sym, dso);
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if (err)
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return err;
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*sym_db_id = *db_id;
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*offset = al->addr - al->sym->start;
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}
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}
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return 0;
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}
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static struct call_path *call_path_from_sample(struct db_export *dbe,
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struct machine *machine,
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struct thread *thread,
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struct perf_sample *sample,
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struct perf_evsel *evsel)
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{
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u64 kernel_start = machine__kernel_start(machine);
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struct call_path *current = &dbe->cpr->call_path;
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enum chain_order saved_order = callchain_param.order;
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int err;
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if (!symbol_conf.use_callchain || !sample->callchain)
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return NULL;
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/*
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* Since the call path tree must be built starting with the root, we
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* must use ORDER_CALL for call chain resolution, in order to process
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* the callchain starting with the root node and ending with the leaf.
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*/
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callchain_param.order = ORDER_CALLER;
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err = thread__resolve_callchain(thread, &callchain_cursor, evsel,
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sample, NULL, NULL, PERF_MAX_STACK_DEPTH);
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if (err) {
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callchain_param.order = saved_order;
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return NULL;
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}
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callchain_cursor_commit(&callchain_cursor);
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while (1) {
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struct callchain_cursor_node *node;
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struct addr_location al;
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u64 dso_db_id = 0, sym_db_id = 0, offset = 0;
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memset(&al, 0, sizeof(al));
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node = callchain_cursor_current(&callchain_cursor);
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if (!node)
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break;
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/*
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* Handle export of symbol and dso for this node by
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* constructing an addr_location struct and then passing it to
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* db_ids_from_al() to perform the export.
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*/
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al.sym = node->sym;
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al.map = node->map;
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al.machine = machine;
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al.addr = node->ip;
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if (al.map && !al.sym)
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al.sym = dso__find_symbol(al.map->dso, al.addr);
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db_ids_from_al(dbe, &al, &dso_db_id, &sym_db_id, &offset);
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/* add node to the call path tree if it doesn't exist */
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current = call_path__findnew(dbe->cpr, current,
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al.sym, node->ip,
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kernel_start);
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callchain_cursor_advance(&callchain_cursor);
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}
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/* Reset the callchain order to its prior value. */
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callchain_param.order = saved_order;
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if (current == &dbe->cpr->call_path) {
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/* Bail because the callchain was empty. */
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return NULL;
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}
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return current;
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}
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int db_export__branch_type(struct db_export *dbe, u32 branch_type,
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const char *name)
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{
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if (dbe->export_branch_type)
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return dbe->export_branch_type(dbe, branch_type, name);
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return 0;
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}
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int db_export__sample(struct db_export *dbe, union perf_event *event,
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struct perf_sample *sample, struct perf_evsel *evsel,
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struct addr_location *al)
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{
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struct thread* thread = al->thread;
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struct export_sample es = {
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.event = event,
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.sample = sample,
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.evsel = evsel,
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.al = al,
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};
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struct thread *main_thread;
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struct comm *comm = NULL;
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int err;
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err = db_export__evsel(dbe, evsel);
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if (err)
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return err;
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err = db_export__machine(dbe, al->machine);
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if (err)
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return err;
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main_thread = thread__main_thread(al->machine, thread);
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if (main_thread)
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comm = machine__thread_exec_comm(al->machine, main_thread);
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err = db_export__thread(dbe, thread, al->machine, comm);
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if (err)
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goto out_put;
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if (comm) {
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err = db_export__comm(dbe, comm, main_thread);
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if (err)
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goto out_put;
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es.comm_db_id = comm->db_id;
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}
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es.db_id = ++dbe->sample_last_db_id;
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err = db_ids_from_al(dbe, al, &es.dso_db_id, &es.sym_db_id, &es.offset);
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if (err)
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goto out_put;
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if (dbe->cpr) {
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struct call_path *cp = call_path_from_sample(dbe, al->machine,
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thread, sample,
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evsel);
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if (cp) {
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db_export__call_path(dbe, cp);
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||
|
|
es.call_path_id = cp->db_id;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if ((evsel->attr.sample_type & PERF_SAMPLE_ADDR) &&
|
||
|
|
sample_addr_correlates_sym(&evsel->attr)) {
|
||
|
|
struct addr_location addr_al;
|
||
|
|
|
||
|
|
thread__resolve(thread, &addr_al, sample);
|
||
|
|
err = db_ids_from_al(dbe, &addr_al, &es.addr_dso_db_id,
|
||
|
|
&es.addr_sym_db_id, &es.addr_offset);
|
||
|
|
if (err)
|
||
|
|
goto out_put;
|
||
|
|
if (dbe->crp) {
|
||
|
|
err = thread_stack__process(thread, comm, sample, al,
|
||
|
|
&addr_al, es.db_id,
|
||
|
|
dbe->crp);
|
||
|
|
if (err)
|
||
|
|
goto out_put;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (dbe->export_sample)
|
||
|
|
err = dbe->export_sample(dbe, &es);
|
||
|
|
|
||
|
|
out_put:
|
||
|
|
thread__put(main_thread);
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct {
|
||
|
|
u32 branch_type;
|
||
|
|
const char *name;
|
||
|
|
} branch_types[] = {
|
||
|
|
{0, "no branch"},
|
||
|
|
{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL, "call"},
|
||
|
|
{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN, "return"},
|
||
|
|
{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CONDITIONAL, "conditional jump"},
|
||
|
|
{PERF_IP_FLAG_BRANCH, "unconditional jump"},
|
||
|
|
{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_INTERRUPT,
|
||
|
|
"software interrupt"},
|
||
|
|
{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN | PERF_IP_FLAG_INTERRUPT,
|
||
|
|
"return from interrupt"},
|
||
|
|
{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_SYSCALLRET,
|
||
|
|
"system call"},
|
||
|
|
{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN | PERF_IP_FLAG_SYSCALLRET,
|
||
|
|
"return from system call"},
|
||
|
|
{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_ASYNC, "asynchronous branch"},
|
||
|
|
{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_ASYNC |
|
||
|
|
PERF_IP_FLAG_INTERRUPT, "hardware interrupt"},
|
||
|
|
{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TX_ABORT, "transaction abort"},
|
||
|
|
{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TRACE_BEGIN, "trace begin"},
|
||
|
|
{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TRACE_END, "trace end"},
|
||
|
|
{0, NULL}
|
||
|
|
};
|
||
|
|
|
||
|
|
int db_export__branch_types(struct db_export *dbe)
|
||
|
|
{
|
||
|
|
int i, err = 0;
|
||
|
|
|
||
|
|
for (i = 0; branch_types[i].name ; i++) {
|
||
|
|
err = db_export__branch_type(dbe, branch_types[i].branch_type,
|
||
|
|
branch_types[i].name);
|
||
|
|
if (err)
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
int db_export__call_path(struct db_export *dbe, struct call_path *cp)
|
||
|
|
{
|
||
|
|
int err;
|
||
|
|
|
||
|
|
if (cp->db_id)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
if (cp->parent) {
|
||
|
|
err = db_export__call_path(dbe, cp->parent);
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
cp->db_id = ++dbe->call_path_last_db_id;
|
||
|
|
|
||
|
|
if (dbe->export_call_path)
|
||
|
|
return dbe->export_call_path(dbe, cp);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int db_export__call_return(struct db_export *dbe, struct call_return *cr)
|
||
|
|
{
|
||
|
|
int err;
|
||
|
|
|
||
|
|
if (cr->db_id)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
err = db_export__call_path(dbe, cr->cp);
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
|
||
|
|
cr->db_id = ++dbe->call_return_last_db_id;
|
||
|
|
|
||
|
|
if (dbe->export_call_return)
|
||
|
|
return dbe->export_call_return(dbe, cr);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|