linux/tools/perf/util/db-export.c
Thomas Gleixner 2025cf9e19 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms and conditions of the gnu general public license
  version 2 as published by the free software foundation this program
  is distributed in the hope 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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 263 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Alexios Zavras <alexios.zavras@intel.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190529141901.208660670@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-05 17:36:37 +02:00

527 lines
12 KiB
C

// SPDX-License-Identifier: GPL-2.0-only
/*
* db-export.c: Support for exporting data suitable for import to a database
* Copyright (c) 2014, Intel Corporation.
*/
#include <errno.h>
#include "evsel.h"
#include "machine.h"
#include "thread.h"
#include "comm.h"
#include "symbol.h"
#include "map.h"
#include "event.h"
#include "util.h"
#include "thread-stack.h"
#include "callchain.h"
#include "call-path.h"
#include "db-export.h"
struct deferred_export {
struct list_head node;
struct comm *comm;
};
static int db_export__deferred(struct db_export *dbe)
{
struct deferred_export *de;
int err;
while (!list_empty(&dbe->deferred)) {
de = list_entry(dbe->deferred.next, struct deferred_export,
node);
err = dbe->export_comm(dbe, de->comm);
list_del(&de->node);
free(de);
if (err)
return err;
}
return 0;
}
static void db_export__free_deferred(struct db_export *dbe)
{
struct deferred_export *de;
while (!list_empty(&dbe->deferred)) {
de = list_entry(dbe->deferred.next, struct deferred_export,
node);
list_del(&de->node);
free(de);
}
}
static int db_export__defer_comm(struct db_export *dbe, struct comm *comm)
{
struct deferred_export *de;
de = zalloc(sizeof(struct deferred_export));
if (!de)
return -ENOMEM;
de->comm = comm;
list_add_tail(&de->node, &dbe->deferred);
return 0;
}
int db_export__init(struct db_export *dbe)
{
memset(dbe, 0, sizeof(struct db_export));
INIT_LIST_HEAD(&dbe->deferred);
return 0;
}
int db_export__flush(struct db_export *dbe)
{
return db_export__deferred(dbe);
}
void db_export__exit(struct db_export *dbe)
{
db_export__free_deferred(dbe);
call_return_processor__free(dbe->crp);
dbe->crp = NULL;
}
int db_export__evsel(struct db_export *dbe, struct perf_evsel *evsel)
{
if (evsel->db_id)
return 0;
evsel->db_id = ++dbe->evsel_last_db_id;
if (dbe->export_evsel)
return dbe->export_evsel(dbe, evsel);
return 0;
}
int db_export__machine(struct db_export *dbe, struct machine *machine)
{
if (machine->db_id)
return 0;
machine->db_id = ++dbe->machine_last_db_id;
if (dbe->export_machine)
return dbe->export_machine(dbe, machine);
return 0;
}
int db_export__thread(struct db_export *dbe, struct thread *thread,
struct machine *machine, struct comm *comm)
{
struct thread *main_thread;
u64 main_thread_db_id = 0;
int err;
if (thread->db_id)
return 0;
thread->db_id = ++dbe->thread_last_db_id;
if (thread->pid_ != -1) {
if (thread->pid_ == thread->tid) {
main_thread = thread;
} else {
main_thread = machine__findnew_thread(machine,
thread->pid_,
thread->pid_);
if (!main_thread)
return -ENOMEM;
err = db_export__thread(dbe, main_thread, machine,
comm);
if (err)
goto out_put;
if (comm) {
err = db_export__comm_thread(dbe, comm, thread);
if (err)
goto out_put;
}
}
main_thread_db_id = main_thread->db_id;
if (main_thread != thread)
thread__put(main_thread);
}
if (dbe->export_thread)
return dbe->export_thread(dbe, thread, main_thread_db_id,
machine);
return 0;
out_put:
thread__put(main_thread);
return err;
}
int db_export__comm(struct db_export *dbe, struct comm *comm,
struct thread *main_thread)
{
int err;
if (comm->db_id)
return 0;
comm->db_id = ++dbe->comm_last_db_id;
if (dbe->export_comm) {
if (main_thread->comm_set)
err = dbe->export_comm(dbe, comm);
else
err = db_export__defer_comm(dbe, comm);
if (err)
return err;
}
return db_export__comm_thread(dbe, comm, main_thread);
}
int db_export__comm_thread(struct db_export *dbe, struct comm *comm,
struct thread *thread)
{
u64 db_id;
db_id = ++dbe->comm_thread_last_db_id;
if (dbe->export_comm_thread)
return dbe->export_comm_thread(dbe, db_id, comm, thread);
return 0;
}
int db_export__dso(struct db_export *dbe, struct dso *dso,
struct machine *machine)
{
if (dso->db_id)
return 0;
dso->db_id = ++dbe->dso_last_db_id;
if (dbe->export_dso)
return dbe->export_dso(dbe, dso, machine);
return 0;
}
int db_export__symbol(struct db_export *dbe, struct symbol *sym,
struct dso *dso)
{
u64 *sym_db_id = symbol__priv(sym);
if (*sym_db_id)
return 0;
*sym_db_id = ++dbe->symbol_last_db_id;
if (dbe->export_symbol)
return dbe->export_symbol(dbe, sym, dso);
return 0;
}
static int db_ids_from_al(struct db_export *dbe, struct addr_location *al,
u64 *dso_db_id, u64 *sym_db_id, u64 *offset)
{
int err;
if (al->map) {
struct dso *dso = al->map->dso;
err = db_export__dso(dbe, dso, al->machine);
if (err)
return err;
*dso_db_id = dso->db_id;
if (!al->sym) {
al->sym = symbol__new(al->addr, 0, 0, 0, "unknown");
if (al->sym)
dso__insert_symbol(dso, al->sym);
}
if (al->sym) {
u64 *db_id = symbol__priv(al->sym);
err = db_export__symbol(dbe, al->sym, dso);
if (err)
return err;
*sym_db_id = *db_id;
*offset = al->addr - al->sym->start;
}
}
return 0;
}
static struct call_path *call_path_from_sample(struct db_export *dbe,
struct machine *machine,
struct thread *thread,
struct perf_sample *sample,
struct perf_evsel *evsel)
{
u64 kernel_start = machine__kernel_start(machine);
struct call_path *current = &dbe->cpr->call_path;
enum chain_order saved_order = callchain_param.order;
int err;
if (!symbol_conf.use_callchain || !sample->callchain)
return NULL;
/*
* Since the call path tree must be built starting with the root, we
* must use ORDER_CALL for call chain resolution, in order to process
* the callchain starting with the root node and ending with the leaf.
*/
callchain_param.order = ORDER_CALLER;
err = thread__resolve_callchain(thread, &callchain_cursor, evsel,
sample, NULL, NULL, PERF_MAX_STACK_DEPTH);
if (err) {
callchain_param.order = saved_order;
return NULL;
}
callchain_cursor_commit(&callchain_cursor);
while (1) {
struct callchain_cursor_node *node;
struct addr_location al;
u64 dso_db_id = 0, sym_db_id = 0, offset = 0;
memset(&al, 0, sizeof(al));
node = callchain_cursor_current(&callchain_cursor);
if (!node)
break;
/*
* Handle export of symbol and dso for this node by
* constructing an addr_location struct and then passing it to
* db_ids_from_al() to perform the export.
*/
al.sym = node->sym;
al.map = node->map;
al.machine = machine;
al.addr = node->ip;
if (al.map && !al.sym)
al.sym = dso__find_symbol(al.map->dso, al.addr);
db_ids_from_al(dbe, &al, &dso_db_id, &sym_db_id, &offset);
/* add node to the call path tree if it doesn't exist */
current = call_path__findnew(dbe->cpr, current,
al.sym, node->ip,
kernel_start);
callchain_cursor_advance(&callchain_cursor);
}
/* Reset the callchain order to its prior value. */
callchain_param.order = saved_order;
if (current == &dbe->cpr->call_path) {
/* Bail because the callchain was empty. */
return NULL;
}
return current;
}
int db_export__branch_type(struct db_export *dbe, u32 branch_type,
const char *name)
{
if (dbe->export_branch_type)
return dbe->export_branch_type(dbe, branch_type, name);
return 0;
}
int db_export__sample(struct db_export *dbe, union perf_event *event,
struct perf_sample *sample, struct perf_evsel *evsel,
struct addr_location *al)
{
struct thread* thread = al->thread;
struct export_sample es = {
.event = event,
.sample = sample,
.evsel = evsel,
.al = al,
};
struct thread *main_thread;
struct comm *comm = NULL;
int err;
err = db_export__evsel(dbe, evsel);
if (err)
return err;
err = db_export__machine(dbe, al->machine);
if (err)
return err;
main_thread = thread__main_thread(al->machine, thread);
if (main_thread)
comm = machine__thread_exec_comm(al->machine, main_thread);
err = db_export__thread(dbe, thread, al->machine, comm);
if (err)
goto out_put;
if (comm) {
err = db_export__comm(dbe, comm, main_thread);
if (err)
goto out_put;
es.comm_db_id = comm->db_id;
}
es.db_id = ++dbe->sample_last_db_id;
err = db_ids_from_al(dbe, al, &es.dso_db_id, &es.sym_db_id, &es.offset);
if (err)
goto out_put;
if (dbe->cpr) {
struct call_path *cp = call_path_from_sample(dbe, al->machine,
thread, sample,
evsel);
if (cp) {
db_export__call_path(dbe, cp);
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;
}
/* Add trace begin / end variants */
for (i = 0; branch_types[i].name ; i++) {
const char *name = branch_types[i].name;
u32 type = branch_types[i].branch_type;
char buf[64];
if (type == PERF_IP_FLAG_BRANCH ||
(type & (PERF_IP_FLAG_TRACE_BEGIN | PERF_IP_FLAG_TRACE_END)))
continue;
snprintf(buf, sizeof(buf), "trace begin / %s", name);
err = db_export__branch_type(dbe, type | PERF_IP_FLAG_TRACE_BEGIN, buf);
if (err)
break;
snprintf(buf, sizeof(buf), "%s / trace end", name);
err = db_export__branch_type(dbe, type | PERF_IP_FLAG_TRACE_END, buf);
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,
u64 *parent_db_id)
{
int err;
err = db_export__call_path(dbe, cr->cp);
if (err)
return err;
if (!cr->db_id)
cr->db_id = ++dbe->call_return_last_db_id;
if (parent_db_id) {
if (!*parent_db_id)
*parent_db_id = ++dbe->call_return_last_db_id;
cr->parent_db_id = *parent_db_id;
}
if (dbe->export_call_return)
return dbe->export_call_return(dbe, cr);
return 0;
}