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linuxdebug/tools/perf/util/data-convert-bt.c

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null pointer error
2024-07-16 15:50:57 +02:00
// SPDX-License-Identifier: GPL-2.0-only
/*
* CTF writing support via babeltrace.
*
* Copyright (C) 2014, Jiri Olsa <jolsa@redhat.com>
* Copyright (C) 2014, Sebastian Andrzej Siewior <bigeasy@linutronix.de>
*/
#include <errno.h>
#include <inttypes.h>
#include <linux/compiler.h>
#include <linux/kernel.h>
#include <linux/zalloc.h>
#include <babeltrace/ctf-writer/writer.h>
#include <babeltrace/ctf-writer/clock.h>
#include <babeltrace/ctf-writer/stream.h>
#include <babeltrace/ctf-writer/event.h>
#include <babeltrace/ctf-writer/event-types.h>
#include <babeltrace/ctf-writer/event-fields.h>
#include <babeltrace/ctf-ir/utils.h>
#include <babeltrace/ctf/events.h>
#include <traceevent/event-parse.h>
#include "asm/bug.h"
#include "data-convert.h"
#include "session.h"
#include "debug.h"
#include "tool.h"
#include "evlist.h"
#include "evsel.h"
#include "machine.h"
#include "config.h"
#include <linux/ctype.h>
#include <linux/err.h>
#include <linux/time64.h>
#include "util.h"
#include "clockid.h"
#define pr_N(n, fmt, ...) \
eprintf(n, debug_data_convert, fmt, ##__VA_ARGS__)
#define pr(fmt, ...) pr_N(1, pr_fmt(fmt), ##__VA_ARGS__)
#define pr2(fmt, ...) pr_N(2, pr_fmt(fmt), ##__VA_ARGS__)
#define pr_time2(t, fmt, ...) pr_time_N(2, debug_data_convert, t, pr_fmt(fmt), ##__VA_ARGS__)
struct evsel_priv {
struct bt_ctf_event_class *event_class;
};
#define MAX_CPUS 4096
struct ctf_stream {
struct bt_ctf_stream *stream;
int cpu;
u32 count;
};
struct ctf_writer {
/* writer primitives */
struct bt_ctf_writer *writer;
struct ctf_stream **stream;
int stream_cnt;
struct bt_ctf_stream_class *stream_class;
struct bt_ctf_clock *clock;
/* data types */
union {
struct {
struct bt_ctf_field_type *s64;
struct bt_ctf_field_type *u64;
struct bt_ctf_field_type *s32;
struct bt_ctf_field_type *u32;
struct bt_ctf_field_type *string;
struct bt_ctf_field_type *u32_hex;
struct bt_ctf_field_type *u64_hex;
};
struct bt_ctf_field_type *array[6];
} data;
struct bt_ctf_event_class *comm_class;
struct bt_ctf_event_class *exit_class;
struct bt_ctf_event_class *fork_class;
struct bt_ctf_event_class *mmap_class;
struct bt_ctf_event_class *mmap2_class;
};
struct convert {
struct perf_tool tool;
struct ctf_writer writer;
u64 events_size;
u64 events_count;
u64 non_sample_count;
/* Ordered events configured queue size. */
u64 queue_size;
};
static int value_set(struct bt_ctf_field_type *type,
struct bt_ctf_event *event,
const char *name, u64 val)
{
struct bt_ctf_field *field;
bool sign = bt_ctf_field_type_integer_get_signed(type);
int ret;
field = bt_ctf_field_create(type);
if (!field) {
pr_err("failed to create a field %s\n", name);
return -1;
}
if (sign) {
ret = bt_ctf_field_signed_integer_set_value(field, val);
if (ret) {
pr_err("failed to set field value %s\n", name);
goto err;
}
} else {
ret = bt_ctf_field_unsigned_integer_set_value(field, val);
if (ret) {
pr_err("failed to set field value %s\n", name);
goto err;
}
}
ret = bt_ctf_event_set_payload(event, name, field);
if (ret) {
pr_err("failed to set payload %s\n", name);
goto err;
}
pr2(" SET [%s = %" PRIu64 "]\n", name, val);
err:
bt_ctf_field_put(field);
return ret;
}
#define __FUNC_VALUE_SET(_name, _val_type) \
static __maybe_unused int value_set_##_name(struct ctf_writer *cw, \
struct bt_ctf_event *event, \
const char *name, \
_val_type val) \
{ \
struct bt_ctf_field_type *type = cw->data._name; \
return value_set(type, event, name, (u64) val); \
}
#define FUNC_VALUE_SET(_name) __FUNC_VALUE_SET(_name, _name)
FUNC_VALUE_SET(s32)
FUNC_VALUE_SET(u32)
FUNC_VALUE_SET(s64)
FUNC_VALUE_SET(u64)
__FUNC_VALUE_SET(u64_hex, u64)
static int string_set_value(struct bt_ctf_field *field, const char *string);
static __maybe_unused int
value_set_string(struct ctf_writer *cw, struct bt_ctf_event *event,
const char *name, const char *string)
{
struct bt_ctf_field_type *type = cw->data.string;
struct bt_ctf_field *field;
int ret = 0;
field = bt_ctf_field_create(type);
if (!field) {
pr_err("failed to create a field %s\n", name);
return -1;
}
ret = string_set_value(field, string);
if (ret) {
pr_err("failed to set value %s\n", name);
goto err_put_field;
}
ret = bt_ctf_event_set_payload(event, name, field);
if (ret)
pr_err("failed to set payload %s\n", name);
err_put_field:
bt_ctf_field_put(field);
return ret;
}
static struct bt_ctf_field_type*
get_tracepoint_field_type(struct ctf_writer *cw, struct tep_format_field *field)
{
unsigned long flags = field->flags;
if (flags & TEP_FIELD_IS_STRING)
return cw->data.string;
if (!(flags & TEP_FIELD_IS_SIGNED)) {
/* unsigned long are mostly pointers */
if (flags & TEP_FIELD_IS_LONG || flags & TEP_FIELD_IS_POINTER)
return cw->data.u64_hex;
}
if (flags & TEP_FIELD_IS_SIGNED) {
if (field->size == 8)
return cw->data.s64;
else
return cw->data.s32;
}
if (field->size == 8)
return cw->data.u64;
else
return cw->data.u32;
}
static unsigned long long adjust_signedness(unsigned long long value_int, int size)
{
unsigned long long value_mask;
/*
* value_mask = (1 << (size * 8 - 1)) - 1.
* Directly set value_mask for code readers.
*/
switch (size) {
case 1:
value_mask = 0x7fULL;
break;
case 2:
value_mask = 0x7fffULL;
break;
case 4:
value_mask = 0x7fffffffULL;
break;
case 8:
/*
* For 64 bit value, return it self. There is no need
* to fill high bit.
*/
/* Fall through */
default:
/* BUG! */
return value_int;
}
/* If it is a positive value, don't adjust. */
if ((value_int & (~0ULL - value_mask)) == 0)
return value_int;
/* Fill upper part of value_int with 1 to make it a negative long long. */
return (value_int & value_mask) | ~value_mask;
}
static int string_set_value(struct bt_ctf_field *field, const char *string)
{
char *buffer = NULL;
size_t len = strlen(string), i, p;
int err;
for (i = p = 0; i < len; i++, p++) {
if (isprint(string[i])) {
if (!buffer)
continue;
buffer[p] = string[i];
} else {
char numstr[5];
snprintf(numstr, sizeof(numstr), "\\x%02x",
(unsigned int)(string[i]) & 0xff);
if (!buffer) {
buffer = zalloc(i + (len - i) * 4 + 2);
if (!buffer) {
pr_err("failed to set unprintable string '%s'\n", string);
return bt_ctf_field_string_set_value(field, "UNPRINTABLE-STRING");
}
if (i > 0)
strncpy(buffer, string, i);
}
memcpy(buffer + p, numstr, 4);
p += 3;
}
}
if (!buffer)
return bt_ctf_field_string_set_value(field, string);
err = bt_ctf_field_string_set_value(field, buffer);
free(buffer);
return err;
}
static int add_tracepoint_field_value(struct ctf_writer *cw,
struct bt_ctf_event_class *event_class,
struct bt_ctf_event *event,
struct perf_sample *sample,
struct tep_format_field *fmtf)
{
struct bt_ctf_field_type *type;
struct bt_ctf_field *array_field;
struct bt_ctf_field *field;
const char *name = fmtf->name;
void *data = sample->raw_data;
unsigned long flags = fmtf->flags;
unsigned int n_items;
unsigned int i;
unsigned int offset;
unsigned int len;
int ret;
name = fmtf->alias;
offset = fmtf->offset;
len = fmtf->size;
if (flags & TEP_FIELD_IS_STRING)
flags &= ~TEP_FIELD_IS_ARRAY;
if (flags & TEP_FIELD_IS_DYNAMIC) {
unsigned long long tmp_val;
tmp_val = tep_read_number(fmtf->event->tep,
data + offset, len);
offset = tmp_val;
len = offset >> 16;
offset &= 0xffff;
if (flags & TEP_FIELD_IS_RELATIVE)
offset += fmtf->offset + fmtf->size;
}
if (flags & TEP_FIELD_IS_ARRAY) {
type = bt_ctf_event_class_get_field_by_name(
event_class, name);
array_field = bt_ctf_field_create(type);
bt_ctf_field_type_put(type);
if (!array_field) {
pr_err("Failed to create array type %s\n", name);
return -1;
}
len = fmtf->size / fmtf->arraylen;
n_items = fmtf->arraylen;
} else {
n_items = 1;
array_field = NULL;
}
type = get_tracepoint_field_type(cw, fmtf);
for (i = 0; i < n_items; i++) {
if (flags & TEP_FIELD_IS_ARRAY)
field = bt_ctf_field_array_get_field(array_field, i);
else
field = bt_ctf_field_create(type);
if (!field) {
pr_err("failed to create a field %s\n", name);
return -1;
}
if (flags & TEP_FIELD_IS_STRING)
ret = string_set_value(field, data + offset + i * len);
else {
unsigned long long value_int;
value_int = tep_read_number(
fmtf->event->tep,
data + offset + i * len, len);
if (!(flags & TEP_FIELD_IS_SIGNED))
ret = bt_ctf_field_unsigned_integer_set_value(
field, value_int);
else
ret = bt_ctf_field_signed_integer_set_value(
field, adjust_signedness(value_int, len));
}
if (ret) {
pr_err("failed to set file value %s\n", name);
goto err_put_field;
}
if (!(flags & TEP_FIELD_IS_ARRAY)) {
ret = bt_ctf_event_set_payload(event, name, field);
if (ret) {
pr_err("failed to set payload %s\n", name);
goto err_put_field;
}
}
bt_ctf_field_put(field);
}
if (flags & TEP_FIELD_IS_ARRAY) {
ret = bt_ctf_event_set_payload(event, name, array_field);
if (ret) {
pr_err("Failed add payload array %s\n", name);
return -1;
}
bt_ctf_field_put(array_field);
}
return 0;
err_put_field:
bt_ctf_field_put(field);
return -1;
}
static int add_tracepoint_fields_values(struct ctf_writer *cw,
struct bt_ctf_event_class *event_class,
struct bt_ctf_event *event,
struct tep_format_field *fields,
struct perf_sample *sample)
{
struct tep_format_field *field;
int ret;
for (field = fields; field; field = field->next) {
ret = add_tracepoint_field_value(cw, event_class, event, sample,
field);
if (ret)
return -1;
}
return 0;
}
static int add_tracepoint_values(struct ctf_writer *cw,
struct bt_ctf_event_class *event_class,
struct bt_ctf_event *event,
struct evsel *evsel,
struct perf_sample *sample)
{
struct tep_format_field *common_fields = evsel->tp_format->format.common_fields;
struct tep_format_field *fields = evsel->tp_format->format.fields;
int ret;
ret = add_tracepoint_fields_values(cw, event_class, event,
common_fields, sample);
if (!ret)
ret = add_tracepoint_fields_values(cw, event_class, event,
fields, sample);
return ret;
}
static int
add_bpf_output_values(struct bt_ctf_event_class *event_class,
struct bt_ctf_event *event,
struct perf_sample *sample)
{
struct bt_ctf_field_type *len_type, *seq_type;
struct bt_ctf_field *len_field, *seq_field;
unsigned int raw_size = sample->raw_size;
unsigned int nr_elements = raw_size / sizeof(u32);
unsigned int i;
int ret;
if (nr_elements * sizeof(u32) != raw_size)
pr_warning("Incorrect raw_size (%u) in bpf output event, skip %zu bytes\n",
raw_size, nr_elements * sizeof(u32) - raw_size);
len_type = bt_ctf_event_class_get_field_by_name(event_class, "raw_len");
len_field = bt_ctf_field_create(len_type);
if (!len_field) {
pr_err("failed to create 'raw_len' for bpf output event\n");
ret = -1;
goto put_len_type;
}
ret = bt_ctf_field_unsigned_integer_set_value(len_field, nr_elements);
if (ret) {
pr_err("failed to set field value for raw_len\n");
goto put_len_field;
}
ret = bt_ctf_event_set_payload(event, "raw_len", len_field);
if (ret) {
pr_err("failed to set payload to raw_len\n");
goto put_len_field;
}
seq_type = bt_ctf_event_class_get_field_by_name(event_class, "raw_data");
seq_field = bt_ctf_field_create(seq_type);
if (!seq_field) {
pr_err("failed to create 'raw_data' for bpf output event\n");
ret = -1;
goto put_seq_type;
}
ret = bt_ctf_field_sequence_set_length(seq_field, len_field);
if (ret) {
pr_err("failed to set length of 'raw_data'\n");
goto put_seq_field;
}
for (i = 0; i < nr_elements; i++) {
struct bt_ctf_field *elem_field =
bt_ctf_field_sequence_get_field(seq_field, i);
ret = bt_ctf_field_unsigned_integer_set_value(elem_field,
((u32 *)(sample->raw_data))[i]);
bt_ctf_field_put(elem_field);
if (ret) {
pr_err("failed to set raw_data[%d]\n", i);
goto put_seq_field;
}
}
ret = bt_ctf_event_set_payload(event, "raw_data", seq_field);
if (ret)
pr_err("failed to set payload for raw_data\n");
put_seq_field:
bt_ctf_field_put(seq_field);
put_seq_type:
bt_ctf_field_type_put(seq_type);
put_len_field:
bt_ctf_field_put(len_field);
put_len_type:
bt_ctf_field_type_put(len_type);
return ret;
}
static int
add_callchain_output_values(struct bt_ctf_event_class *event_class,
struct bt_ctf_event *event,
struct ip_callchain *callchain)
{
struct bt_ctf_field_type *len_type, *seq_type;
struct bt_ctf_field *len_field, *seq_field;
unsigned int nr_elements = callchain->nr;
unsigned int i;
int ret;
len_type = bt_ctf_event_class_get_field_by_name(
event_class, "perf_callchain_size");
len_field = bt_ctf_field_create(len_type);
if (!len_field) {
pr_err("failed to create 'perf_callchain_size' for callchain output event\n");
ret = -1;
goto put_len_type;
}
ret = bt_ctf_field_unsigned_integer_set_value(len_field, nr_elements);
if (ret) {
pr_err("failed to set field value for perf_callchain_size\n");
goto put_len_field;
}
ret = bt_ctf_event_set_payload(event, "perf_callchain_size", len_field);
if (ret) {
pr_err("failed to set payload to perf_callchain_size\n");
goto put_len_field;
}
seq_type = bt_ctf_event_class_get_field_by_name(
event_class, "perf_callchain");
seq_field = bt_ctf_field_create(seq_type);
if (!seq_field) {
pr_err("failed to create 'perf_callchain' for callchain output event\n");
ret = -1;
goto put_seq_type;
}
ret = bt_ctf_field_sequence_set_length(seq_field, len_field);
if (ret) {
pr_err("failed to set length of 'perf_callchain'\n");
goto put_seq_field;
}
for (i = 0; i < nr_elements; i++) {
struct bt_ctf_field *elem_field =
bt_ctf_field_sequence_get_field(seq_field, i);
ret = bt_ctf_field_unsigned_integer_set_value(elem_field,
((u64 *)(callchain->ips))[i]);
bt_ctf_field_put(elem_field);
if (ret) {
pr_err("failed to set callchain[%d]\n", i);
goto put_seq_field;
}
}
ret = bt_ctf_event_set_payload(event, "perf_callchain", seq_field);
if (ret)
pr_err("failed to set payload for raw_data\n");
put_seq_field:
bt_ctf_field_put(seq_field);
put_seq_type:
bt_ctf_field_type_put(seq_type);
put_len_field:
bt_ctf_field_put(len_field);
put_len_type:
bt_ctf_field_type_put(len_type);
return ret;
}
static int add_generic_values(struct ctf_writer *cw,
struct bt_ctf_event *event,
struct evsel *evsel,
struct perf_sample *sample)
{
u64 type = evsel->core.attr.sample_type;
int ret;
/*
* missing:
* PERF_SAMPLE_TIME - not needed as we have it in
* ctf event header
* PERF_SAMPLE_READ - TODO
* PERF_SAMPLE_RAW - tracepoint fields are handled separately
* PERF_SAMPLE_BRANCH_STACK - TODO
* PERF_SAMPLE_REGS_USER - TODO
* PERF_SAMPLE_STACK_USER - TODO
*/
if (type & PERF_SAMPLE_IP) {
ret = value_set_u64_hex(cw, event, "perf_ip", sample->ip);
if (ret)
return -1;
}
if (type & PERF_SAMPLE_TID) {
ret = value_set_s32(cw, event, "perf_tid", sample->tid);
if (ret)
return -1;
ret = value_set_s32(cw, event, "perf_pid", sample->pid);
if (ret)
return -1;
}
if ((type & PERF_SAMPLE_ID) ||
(type & PERF_SAMPLE_IDENTIFIER)) {
ret = value_set_u64(cw, event, "perf_id", sample->id);
if (ret)
return -1;
}
if (type & PERF_SAMPLE_STREAM_ID) {
ret = value_set_u64(cw, event, "perf_stream_id", sample->stream_id);
if (ret)
return -1;
}
if (type & PERF_SAMPLE_PERIOD) {
ret = value_set_u64(cw, event, "perf_period", sample->period);
if (ret)
return -1;
}
if (type & PERF_SAMPLE_WEIGHT) {
ret = value_set_u64(cw, event, "perf_weight", sample->weight);
if (ret)
return -1;
}
if (type & PERF_SAMPLE_DATA_SRC) {
ret = value_set_u64(cw, event, "perf_data_src",
sample->data_src);
if (ret)
return -1;
}
if (type & PERF_SAMPLE_TRANSACTION) {
ret = value_set_u64(cw, event, "perf_transaction",
sample->transaction);
if (ret)
return -1;
}
return 0;
}
static int ctf_stream__flush(struct ctf_stream *cs)
{
int err = 0;
if (cs) {
err = bt_ctf_stream_flush(cs->stream);
if (err)
pr_err("CTF stream %d flush failed\n", cs->cpu);
pr("Flush stream for cpu %d (%u samples)\n",
cs->cpu, cs->count);
cs->count = 0;
}
return err;
}
static struct ctf_stream *ctf_stream__create(struct ctf_writer *cw, int cpu)
{
struct ctf_stream *cs;
struct bt_ctf_field *pkt_ctx = NULL;
struct bt_ctf_field *cpu_field = NULL;
struct bt_ctf_stream *stream = NULL;
int ret;
cs = zalloc(sizeof(*cs));
if (!cs) {
pr_err("Failed to allocate ctf stream\n");
return NULL;
}
stream = bt_ctf_writer_create_stream(cw->writer, cw->stream_class);
if (!stream) {
pr_err("Failed to create CTF stream\n");
goto out;
}
pkt_ctx = bt_ctf_stream_get_packet_context(stream);
if (!pkt_ctx) {
pr_err("Failed to obtain packet context\n");
goto out;
}
cpu_field = bt_ctf_field_structure_get_field(pkt_ctx, "cpu_id");
bt_ctf_field_put(pkt_ctx);
if (!cpu_field) {
pr_err("Failed to obtain cpu field\n");
goto out;
}
ret = bt_ctf_field_unsigned_integer_set_value(cpu_field, (u32) cpu);
if (ret) {
pr_err("Failed to update CPU number\n");
goto out;
}
bt_ctf_field_put(cpu_field);
cs->cpu = cpu;
cs->stream = stream;
return cs;
out:
if (cpu_field)
bt_ctf_field_put(cpu_field);
if (stream)
bt_ctf_stream_put(stream);
free(cs);
return NULL;
}
static void ctf_stream__delete(struct ctf_stream *cs)
{
if (cs) {
bt_ctf_stream_put(cs->stream);
free(cs);
}
}
static struct ctf_stream *ctf_stream(struct ctf_writer *cw, int cpu)
{
struct ctf_stream *cs = cw->stream[cpu];
if (!cs) {
cs = ctf_stream__create(cw, cpu);
cw->stream[cpu] = cs;
}
return cs;
}
static int get_sample_cpu(struct ctf_writer *cw, struct perf_sample *sample,
struct evsel *evsel)
{
int cpu = 0;
if (evsel->core.attr.sample_type & PERF_SAMPLE_CPU)
cpu = sample->cpu;
if (cpu > cw->stream_cnt) {
pr_err("Event was recorded for CPU %d, limit is at %d.\n",
cpu, cw->stream_cnt);
cpu = 0;
}
return cpu;
}
#define STREAM_FLUSH_COUNT 100000
/*
* Currently we have no other way to determine the
* time for the stream flush other than keep track
* of the number of events and check it against
* threshold.
*/
static bool is_flush_needed(struct ctf_stream *cs)
{
return cs->count >= STREAM_FLUSH_COUNT;
}
static int process_sample_event(struct perf_tool *tool,
union perf_event *_event,
struct perf_sample *sample,
struct evsel *evsel,
struct machine *machine __maybe_unused)
{
struct convert *c = container_of(tool, struct convert, tool);
struct evsel_priv *priv = evsel->priv;
struct ctf_writer *cw = &c->writer;
struct ctf_stream *cs;
struct bt_ctf_event_class *event_class;
struct bt_ctf_event *event;
int ret;
unsigned long type = evsel->core.attr.sample_type;
if (WARN_ONCE(!priv, "Failed to setup all events.\n"))
return 0;
event_class = priv->event_class;
/* update stats */
c->events_count++;
c->events_size += _event->header.size;
pr_time2(sample->time, "sample %" PRIu64 "\n", c->events_count);
event = bt_ctf_event_create(event_class);
if (!event) {
pr_err("Failed to create an CTF event\n");
return -1;
}
bt_ctf_clock_set_time(cw->clock, sample->time);
ret = add_generic_values(cw, event, evsel, sample);
if (ret)
return -1;
if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT) {
ret = add_tracepoint_values(cw, event_class, event,
evsel, sample);
if (ret)
return -1;
}
if (type & PERF_SAMPLE_CALLCHAIN) {
ret = add_callchain_output_values(event_class,
event, sample->callchain);
if (ret)
return -1;
}
if (evsel__is_bpf_output(evsel)) {
ret = add_bpf_output_values(event_class, event, sample);
if (ret)
return -1;
}
cs = ctf_stream(cw, get_sample_cpu(cw, sample, evsel));
if (cs) {
if (is_flush_needed(cs))
ctf_stream__flush(cs);
cs->count++;
bt_ctf_stream_append_event(cs->stream, event);
}
bt_ctf_event_put(event);
return cs ? 0 : -1;
}
#define __NON_SAMPLE_SET_FIELD(_name, _type, _field) \
do { \
ret = value_set_##_type(cw, event, #_field, _event->_name._field);\
if (ret) \
return -1; \
} while(0)
#define __FUNC_PROCESS_NON_SAMPLE(_name, body) \
static int process_##_name##_event(struct perf_tool *tool, \
union perf_event *_event, \
struct perf_sample *sample, \
struct machine *machine) \
{ \
struct convert *c = container_of(tool, struct convert, tool);\
struct ctf_writer *cw = &c->writer; \
struct bt_ctf_event_class *event_class = cw->_name##_class;\
struct bt_ctf_event *event; \
struct ctf_stream *cs; \
int ret; \
\
c->non_sample_count++; \
c->events_size += _event->header.size; \
event = bt_ctf_event_create(event_class); \
if (!event) { \
pr_err("Failed to create an CTF event\n"); \
return -1; \
} \
\
bt_ctf_clock_set_time(cw->clock, sample->time); \
body \
cs = ctf_stream(cw, 0); \
if (cs) { \
if (is_flush_needed(cs)) \
ctf_stream__flush(cs); \
\
cs->count++; \
bt_ctf_stream_append_event(cs->stream, event); \
} \
bt_ctf_event_put(event); \
\
return perf_event__process_##_name(tool, _event, sample, machine);\
}
__FUNC_PROCESS_NON_SAMPLE(comm,
__NON_SAMPLE_SET_FIELD(comm, u32, pid);
__NON_SAMPLE_SET_FIELD(comm, u32, tid);
__NON_SAMPLE_SET_FIELD(comm, string, comm);
)
__FUNC_PROCESS_NON_SAMPLE(fork,
__NON_SAMPLE_SET_FIELD(fork, u32, pid);
__NON_SAMPLE_SET_FIELD(fork, u32, ppid);
__NON_SAMPLE_SET_FIELD(fork, u32, tid);
__NON_SAMPLE_SET_FIELD(fork, u32, ptid);
__NON_SAMPLE_SET_FIELD(fork, u64, time);
)
__FUNC_PROCESS_NON_SAMPLE(exit,
__NON_SAMPLE_SET_FIELD(fork, u32, pid);
__NON_SAMPLE_SET_FIELD(fork, u32, ppid);
__NON_SAMPLE_SET_FIELD(fork, u32, tid);
__NON_SAMPLE_SET_FIELD(fork, u32, ptid);
__NON_SAMPLE_SET_FIELD(fork, u64, time);
)
__FUNC_PROCESS_NON_SAMPLE(mmap,
__NON_SAMPLE_SET_FIELD(mmap, u32, pid);
__NON_SAMPLE_SET_FIELD(mmap, u32, tid);
__NON_SAMPLE_SET_FIELD(mmap, u64_hex, start);
__NON_SAMPLE_SET_FIELD(mmap, string, filename);
)
__FUNC_PROCESS_NON_SAMPLE(mmap2,
__NON_SAMPLE_SET_FIELD(mmap2, u32, pid);
__NON_SAMPLE_SET_FIELD(mmap2, u32, tid);
__NON_SAMPLE_SET_FIELD(mmap2, u64_hex, start);
__NON_SAMPLE_SET_FIELD(mmap2, string, filename);
)
#undef __NON_SAMPLE_SET_FIELD
#undef __FUNC_PROCESS_NON_SAMPLE
/* If dup < 0, add a prefix. Else, add _dupl_X suffix. */
static char *change_name(char *name, char *orig_name, int dup)
{
char *new_name = NULL;
size_t len;
if (!name)
name = orig_name;
if (dup >= 10)
goto out;
/*
* Add '_' prefix to potential keywork. According to
* Mathieu Desnoyers (https://lore.kernel.org/lkml/1074266107.40857.1422045946295.JavaMail.zimbra@efficios.com),
* further CTF spec updating may require us to use '$'.
*/
if (dup < 0)
len = strlen(name) + sizeof("_");
else
len = strlen(orig_name) + sizeof("_dupl_X");
new_name = malloc(len);
if (!new_name)
goto out;
if (dup < 0)
snprintf(new_name, len, "_%s", name);
else
snprintf(new_name, len, "%s_dupl_%d", orig_name, dup);
out:
if (name != orig_name)
free(name);
return new_name;
}
static int event_class_add_field(struct bt_ctf_event_class *event_class,
struct bt_ctf_field_type *type,
struct tep_format_field *field)
{
struct bt_ctf_field_type *t = NULL;
char *name;
int dup = 1;
int ret;
/* alias was already assigned */
if (field->alias != field->name)
return bt_ctf_event_class_add_field(event_class, type,
(char *)field->alias);
name = field->name;
/* If 'name' is a keywork, add prefix. */
if (bt_ctf_validate_identifier(name))
name = change_name(name, field->name, -1);
if (!name) {
pr_err("Failed to fix invalid identifier.");
return -1;
}
while ((t = bt_ctf_event_class_get_field_by_name(event_class, name))) {
bt_ctf_field_type_put(t);
name = change_name(name, field->name, dup++);
if (!name) {
pr_err("Failed to create dup name for '%s'\n", field->name);
return -1;
}
}
ret = bt_ctf_event_class_add_field(event_class, type, name);
if (!ret)
field->alias = name;
return ret;
}
static int add_tracepoint_fields_types(struct ctf_writer *cw,
struct tep_format_field *fields,
struct bt_ctf_event_class *event_class)
{
struct tep_format_field *field;
int ret;
for (field = fields; field; field = field->next) {
struct bt_ctf_field_type *type;
unsigned long flags = field->flags;
pr2(" field '%s'\n", field->name);
type = get_tracepoint_field_type(cw, field);
if (!type)
return -1;
/*
* A string is an array of chars. For this we use the string
* type and don't care that it is an array. What we don't
* support is an array of strings.
*/
if (flags & TEP_FIELD_IS_STRING)
flags &= ~TEP_FIELD_IS_ARRAY;
if (flags & TEP_FIELD_IS_ARRAY)
type = bt_ctf_field_type_array_create(type, field->arraylen);
ret = event_class_add_field(event_class, type, field);
if (flags & TEP_FIELD_IS_ARRAY)
bt_ctf_field_type_put(type);
if (ret) {
pr_err("Failed to add field '%s': %d\n",
field->name, ret);
return -1;
}
}
return 0;
}
static int add_tracepoint_types(struct ctf_writer *cw,
struct evsel *evsel,
struct bt_ctf_event_class *class)
{
struct tep_format_field *common_fields = evsel->tp_format->format.common_fields;
struct tep_format_field *fields = evsel->tp_format->format.fields;
int ret;
ret = add_tracepoint_fields_types(cw, common_fields, class);
if (!ret)
ret = add_tracepoint_fields_types(cw, fields, class);
return ret;
}
static int add_bpf_output_types(struct ctf_writer *cw,
struct bt_ctf_event_class *class)
{
struct bt_ctf_field_type *len_type = cw->data.u32;
struct bt_ctf_field_type *seq_base_type = cw->data.u32_hex;
struct bt_ctf_field_type *seq_type;
int ret;
ret = bt_ctf_event_class_add_field(class, len_type, "raw_len");
if (ret)
return ret;
seq_type = bt_ctf_field_type_sequence_create(seq_base_type, "raw_len");
if (!seq_type)
return -1;
return bt_ctf_event_class_add_field(class, seq_type, "raw_data");
}
static int add_generic_types(struct ctf_writer *cw, struct evsel *evsel,
struct bt_ctf_event_class *event_class)
{
u64 type = evsel->core.attr.sample_type;
/*
* missing:
* PERF_SAMPLE_TIME - not needed as we have it in
* ctf event header
* PERF_SAMPLE_READ - TODO
* PERF_SAMPLE_CALLCHAIN - TODO
* PERF_SAMPLE_RAW - tracepoint fields and BPF output
* are handled separately
* PERF_SAMPLE_BRANCH_STACK - TODO
* PERF_SAMPLE_REGS_USER - TODO
* PERF_SAMPLE_STACK_USER - TODO
*/
#define ADD_FIELD(cl, t, n) \
do { \
pr2(" field '%s'\n", n); \
if (bt_ctf_event_class_add_field(cl, t, n)) { \
pr_err("Failed to add field '%s';\n", n); \
return -1; \
} \
} while (0)
if (type & PERF_SAMPLE_IP)
ADD_FIELD(event_class, cw->data.u64_hex, "perf_ip");
if (type & PERF_SAMPLE_TID) {
ADD_FIELD(event_class, cw->data.s32, "perf_tid");
ADD_FIELD(event_class, cw->data.s32, "perf_pid");
}
if ((type & PERF_SAMPLE_ID) ||
(type & PERF_SAMPLE_IDENTIFIER))
ADD_FIELD(event_class, cw->data.u64, "perf_id");
if (type & PERF_SAMPLE_STREAM_ID)
ADD_FIELD(event_class, cw->data.u64, "perf_stream_id");
if (type & PERF_SAMPLE_PERIOD)
ADD_FIELD(event_class, cw->data.u64, "perf_period");
if (type & PERF_SAMPLE_WEIGHT)
ADD_FIELD(event_class, cw->data.u64, "perf_weight");
if (type & PERF_SAMPLE_DATA_SRC)
ADD_FIELD(event_class, cw->data.u64, "perf_data_src");
if (type & PERF_SAMPLE_TRANSACTION)
ADD_FIELD(event_class, cw->data.u64, "perf_transaction");
if (type & PERF_SAMPLE_CALLCHAIN) {
ADD_FIELD(event_class, cw->data.u32, "perf_callchain_size");
ADD_FIELD(event_class,
bt_ctf_field_type_sequence_create(
cw->data.u64_hex, "perf_callchain_size"),
"perf_callchain");
}
#undef ADD_FIELD
return 0;
}
static int add_event(struct ctf_writer *cw, struct evsel *evsel)
{
struct bt_ctf_event_class *event_class;
struct evsel_priv *priv;
const char *name = evsel__name(evsel);
int ret;
pr("Adding event '%s' (type %d)\n", name, evsel->core.attr.type);
event_class = bt_ctf_event_class_create(name);
if (!event_class)
return -1;
ret = add_generic_types(cw, evsel, event_class);
if (ret)
goto err;
if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT) {
ret = add_tracepoint_types(cw, evsel, event_class);
if (ret)
goto err;
}
if (evsel__is_bpf_output(evsel)) {
ret = add_bpf_output_types(cw, event_class);
if (ret)
goto err;
}
ret = bt_ctf_stream_class_add_event_class(cw->stream_class, event_class);
if (ret) {
pr("Failed to add event class into stream.\n");
goto err;
}
priv = malloc(sizeof(*priv));
if (!priv)
goto err;
priv->event_class = event_class;
evsel->priv = priv;
return 0;
err:
bt_ctf_event_class_put(event_class);
pr_err("Failed to add event '%s'.\n", name);
return -1;
}
static int setup_events(struct ctf_writer *cw, struct perf_session *session)
{
struct evlist *evlist = session->evlist;
struct evsel *evsel;
int ret;
evlist__for_each_entry(evlist, evsel) {
ret = add_event(cw, evsel);
if (ret)
return ret;
}
return 0;
}
#define __NON_SAMPLE_ADD_FIELD(t, n) \
do { \
pr2(" field '%s'\n", #n); \
if (bt_ctf_event_class_add_field(event_class, cw->data.t, #n)) {\
pr_err("Failed to add field '%s';\n", #n);\
return -1; \
} \
} while(0)
#define __FUNC_ADD_NON_SAMPLE_EVENT_CLASS(_name, body) \
static int add_##_name##_event(struct ctf_writer *cw) \
{ \
struct bt_ctf_event_class *event_class; \
int ret; \
\
pr("Adding "#_name" event\n"); \
event_class = bt_ctf_event_class_create("perf_" #_name);\
if (!event_class) \
return -1; \
body \
\
ret = bt_ctf_stream_class_add_event_class(cw->stream_class, event_class);\
if (ret) { \
pr("Failed to add event class '"#_name"' into stream.\n");\
return ret; \
} \
\
cw->_name##_class = event_class; \
bt_ctf_event_class_put(event_class); \
return 0; \
}
__FUNC_ADD_NON_SAMPLE_EVENT_CLASS(comm,
__NON_SAMPLE_ADD_FIELD(u32, pid);
__NON_SAMPLE_ADD_FIELD(u32, tid);
__NON_SAMPLE_ADD_FIELD(string, comm);
)
__FUNC_ADD_NON_SAMPLE_EVENT_CLASS(fork,
__NON_SAMPLE_ADD_FIELD(u32, pid);
__NON_SAMPLE_ADD_FIELD(u32, ppid);
__NON_SAMPLE_ADD_FIELD(u32, tid);
__NON_SAMPLE_ADD_FIELD(u32, ptid);
__NON_SAMPLE_ADD_FIELD(u64, time);
)
__FUNC_ADD_NON_SAMPLE_EVENT_CLASS(exit,
__NON_SAMPLE_ADD_FIELD(u32, pid);
__NON_SAMPLE_ADD_FIELD(u32, ppid);
__NON_SAMPLE_ADD_FIELD(u32, tid);
__NON_SAMPLE_ADD_FIELD(u32, ptid);
__NON_SAMPLE_ADD_FIELD(u64, time);
)
__FUNC_ADD_NON_SAMPLE_EVENT_CLASS(mmap,
__NON_SAMPLE_ADD_FIELD(u32, pid);
__NON_SAMPLE_ADD_FIELD(u32, tid);
__NON_SAMPLE_ADD_FIELD(u64_hex, start);
__NON_SAMPLE_ADD_FIELD(string, filename);
)
__FUNC_ADD_NON_SAMPLE_EVENT_CLASS(mmap2,
__NON_SAMPLE_ADD_FIELD(u32, pid);
__NON_SAMPLE_ADD_FIELD(u32, tid);
__NON_SAMPLE_ADD_FIELD(u64_hex, start);
__NON_SAMPLE_ADD_FIELD(string, filename);
)
#undef __NON_SAMPLE_ADD_FIELD
#undef __FUNC_ADD_NON_SAMPLE_EVENT_CLASS
static int setup_non_sample_events(struct ctf_writer *cw,
struct perf_session *session __maybe_unused)
{
int ret;
ret = add_comm_event(cw);
if (ret)
return ret;
ret = add_exit_event(cw);
if (ret)
return ret;
ret = add_fork_event(cw);
if (ret)
return ret;
ret = add_mmap_event(cw);
if (ret)
return ret;
ret = add_mmap2_event(cw);
if (ret)
return ret;
return 0;
}
static void cleanup_events(struct perf_session *session)
{
struct evlist *evlist = session->evlist;
struct evsel *evsel;
evlist__for_each_entry(evlist, evsel) {
struct evsel_priv *priv;
priv = evsel->priv;
bt_ctf_event_class_put(priv->event_class);
zfree(&evsel->priv);
}
evlist__delete(evlist);
session->evlist = NULL;
}
static int setup_streams(struct ctf_writer *cw, struct perf_session *session)
{
struct ctf_stream **stream;
struct perf_header *ph = &session->header;
int ncpus;
/*
* Try to get the number of cpus used in the data file,
* if not present fallback to the MAX_CPUS.
*/
ncpus = ph->env.nr_cpus_avail ?: MAX_CPUS;
stream = zalloc(sizeof(*stream) * ncpus);
if (!stream) {
pr_err("Failed to allocate streams.\n");
return -ENOMEM;
}
cw->stream = stream;
cw->stream_cnt = ncpus;
return 0;
}
static void free_streams(struct ctf_writer *cw)
{
int cpu;
for (cpu = 0; cpu < cw->stream_cnt; cpu++)
ctf_stream__delete(cw->stream[cpu]);
zfree(&cw->stream);
}
static int ctf_writer__setup_env(struct ctf_writer *cw,
struct perf_session *session)
{
struct perf_header *header = &session->header;
struct bt_ctf_writer *writer = cw->writer;
#define ADD(__n, __v) \
do { \
if (bt_ctf_writer_add_environment_field(writer, __n, __v)) \
return -1; \
} while (0)
ADD("host", header->env.hostname);
ADD("sysname", "Linux");
ADD("release", header->env.os_release);
ADD("version", header->env.version);
ADD("machine", header->env.arch);
ADD("domain", "kernel");
ADD("tracer_name", "perf");
#undef ADD
return 0;
}
static int ctf_writer__setup_clock(struct ctf_writer *cw,
struct perf_session *session,
bool tod)
{
struct bt_ctf_clock *clock = cw->clock;
const char *desc = "perf clock";
int64_t offset = 0;
if (tod) {
struct perf_env *env = &session->header.env;
if (!env->clock.enabled) {
pr_err("Can't provide --tod time, missing clock data. "
"Please record with -k/--clockid option.\n");
return -1;
}
desc = clockid_name(env->clock.clockid);
offset = env->clock.tod_ns - env->clock.clockid_ns;
}
#define SET(__n, __v) \
do { \
if (bt_ctf_clock_set_##__n(clock, __v)) \
return -1; \
} while (0)
SET(frequency, 1000000000);
SET(offset, offset);
SET(description, desc);
SET(precision, 10);
SET(is_absolute, 0);
#undef SET
return 0;
}
static struct bt_ctf_field_type *create_int_type(int size, bool sign, bool hex)
{
struct bt_ctf_field_type *type;
type = bt_ctf_field_type_integer_create(size);
if (!type)
return NULL;
if (sign &&
bt_ctf_field_type_integer_set_signed(type, 1))
goto err;
if (hex &&
bt_ctf_field_type_integer_set_base(type, BT_CTF_INTEGER_BASE_HEXADECIMAL))
goto err;
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
bt_ctf_field_type_set_byte_order(type, BT_CTF_BYTE_ORDER_BIG_ENDIAN);
#else
bt_ctf_field_type_set_byte_order(type, BT_CTF_BYTE_ORDER_LITTLE_ENDIAN);
#endif
pr2("Created type: INTEGER %d-bit %ssigned %s\n",
size, sign ? "un" : "", hex ? "hex" : "");
return type;
err:
bt_ctf_field_type_put(type);
return NULL;
}
static void ctf_writer__cleanup_data(struct ctf_writer *cw)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(cw->data.array); i++)
bt_ctf_field_type_put(cw->data.array[i]);
}
static int ctf_writer__init_data(struct ctf_writer *cw)
{
#define CREATE_INT_TYPE(type, size, sign, hex) \
do { \
(type) = create_int_type(size, sign, hex); \
if (!(type)) \
goto err; \
} while (0)
CREATE_INT_TYPE(cw->data.s64, 64, true, false);
CREATE_INT_TYPE(cw->data.u64, 64, false, false);
CREATE_INT_TYPE(cw->data.s32, 32, true, false);
CREATE_INT_TYPE(cw->data.u32, 32, false, false);
CREATE_INT_TYPE(cw->data.u32_hex, 32, false, true);
CREATE_INT_TYPE(cw->data.u64_hex, 64, false, true);
cw->data.string = bt_ctf_field_type_string_create();
if (cw->data.string)
return 0;
err:
ctf_writer__cleanup_data(cw);
pr_err("Failed to create data types.\n");
return -1;
}
static void ctf_writer__cleanup(struct ctf_writer *cw)
{
ctf_writer__cleanup_data(cw);
bt_ctf_clock_put(cw->clock);
free_streams(cw);
bt_ctf_stream_class_put(cw->stream_class);
bt_ctf_writer_put(cw->writer);
/* and NULL all the pointers */
memset(cw, 0, sizeof(*cw));
}
static int ctf_writer__init(struct ctf_writer *cw, const char *path,
struct perf_session *session, bool tod)
{
struct bt_ctf_writer *writer;
struct bt_ctf_stream_class *stream_class;
struct bt_ctf_clock *clock;
struct bt_ctf_field_type *pkt_ctx_type;
int ret;
/* CTF writer */
writer = bt_ctf_writer_create(path);
if (!writer)
goto err;
cw->writer = writer;
/* CTF clock */
clock = bt_ctf_clock_create("perf_clock");
if (!clock) {
pr("Failed to create CTF clock.\n");
goto err_cleanup;
}
cw->clock = clock;
if (ctf_writer__setup_clock(cw, session, tod)) {
pr("Failed to setup CTF clock.\n");
goto err_cleanup;
}
/* CTF stream class */
stream_class = bt_ctf_stream_class_create("perf_stream");
if (!stream_class) {
pr("Failed to create CTF stream class.\n");
goto err_cleanup;
}
cw->stream_class = stream_class;
/* CTF clock stream setup */
if (bt_ctf_stream_class_set_clock(stream_class, clock)) {
pr("Failed to assign CTF clock to stream class.\n");
goto err_cleanup;
}
if (ctf_writer__init_data(cw))
goto err_cleanup;
/* Add cpu_id for packet context */
pkt_ctx_type = bt_ctf_stream_class_get_packet_context_type(stream_class);
if (!pkt_ctx_type)
goto err_cleanup;
ret = bt_ctf_field_type_structure_add_field(pkt_ctx_type, cw->data.u32, "cpu_id");
bt_ctf_field_type_put(pkt_ctx_type);
if (ret)
goto err_cleanup;
/* CTF clock writer setup */
if (bt_ctf_writer_add_clock(writer, clock)) {
pr("Failed to assign CTF clock to writer.\n");
goto err_cleanup;
}
return 0;
err_cleanup:
ctf_writer__cleanup(cw);
err:
pr_err("Failed to setup CTF writer.\n");
return -1;
}
static int ctf_writer__flush_streams(struct ctf_writer *cw)
{
int cpu, ret = 0;
for (cpu = 0; cpu < cw->stream_cnt && !ret; cpu++)
ret = ctf_stream__flush(cw->stream[cpu]);
return ret;
}
static int convert__config(const char *var, const char *value, void *cb)
{
struct convert *c = cb;
if (!strcmp(var, "convert.queue-size"))
return perf_config_u64(&c->queue_size, var, value);
return 0;
}
int bt_convert__perf2ctf(const char *input, const char *path,
struct perf_data_convert_opts *opts)
{
struct perf_session *session;
struct perf_data data = {
.path = input,
.mode = PERF_DATA_MODE_READ,
.force = opts->force,
};
struct convert c = {
.tool = {
.sample = process_sample_event,
.mmap = perf_event__process_mmap,
.mmap2 = perf_event__process_mmap2,
.comm = perf_event__process_comm,
.exit = perf_event__process_exit,
.fork = perf_event__process_fork,
.lost = perf_event__process_lost,
.tracing_data = perf_event__process_tracing_data,
.build_id = perf_event__process_build_id,
.namespaces = perf_event__process_namespaces,
.ordered_events = true,
.ordering_requires_timestamps = true,
},
};
struct ctf_writer *cw = &c.writer;
int err;
if (opts->all) {
c.tool.comm = process_comm_event;
c.tool.exit = process_exit_event;
c.tool.fork = process_fork_event;
c.tool.mmap = process_mmap_event;
c.tool.mmap2 = process_mmap2_event;
}
err = perf_config(convert__config, &c);
if (err)
return err;
err = -1;
/* perf.data session */
session = perf_session__new(&data, &c.tool);
if (IS_ERR(session))
return PTR_ERR(session);
/* CTF writer */
if (ctf_writer__init(cw, path, session, opts->tod))
goto free_session;
if (c.queue_size) {
ordered_events__set_alloc_size(&session->ordered_events,
c.queue_size);
}
/* CTF writer env/clock setup */
if (ctf_writer__setup_env(cw, session))
goto free_writer;
/* CTF events setup */
if (setup_events(cw, session))
goto free_writer;
if (opts->all && setup_non_sample_events(cw, session))
goto free_writer;
if (setup_streams(cw, session))
goto free_writer;
err = perf_session__process_events(session);
if (!err)
err = ctf_writer__flush_streams(cw);
else
pr_err("Error during conversion.\n");
fprintf(stderr,
"[ perf data convert: Converted '%s' into CTF data '%s' ]\n",
data.path, path);
fprintf(stderr,
"[ perf data convert: Converted and wrote %.3f MB (%" PRIu64 " samples",
(double) c.events_size / 1024.0 / 1024.0,
c.events_count);
if (!c.non_sample_count)
fprintf(stderr, ") ]\n");
else
fprintf(stderr, ", %" PRIu64 " non-samples) ]\n", c.non_sample_count);
cleanup_events(session);
perf_session__delete(session);
ctf_writer__cleanup(cw);
return err;
free_writer:
ctf_writer__cleanup(cw);
free_session:
perf_session__delete(session);
pr_err("Error during conversion setup.\n");
return err;
}