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linux_dsm_epyc7002/tools/perf/util/synthetic-events.c
Arnaldo Carvalho de Melo 79b6bb73f8 perf maps: Merge 'struct maps' with 'struct map_groups' 
And pick the shortest name: 'struct maps'.

The split existed because we used to have two groups of maps, one for
functions and one for variables, but that only complicated things,
sometimes we needed to figure out what was at some address and then had
to first try it on the functions group and if that failed, fall back to
the variables one.

That split is long gone, so for quite a while we had only one struct
maps per struct map_groups, simplify things by combining those structs.

First patch is the minimum needed to merge both, follow up patches will
rename 'thread->mg' to 'thread->maps', etc.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-hom6639ro7020o708trhxh59@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-11-26 11:07:46 -03:00

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// SPDX-License-Identifier: GPL-2.0-only
#include "util/debug.h"
#include "util/dso.h"
#include "util/event.h"
#include "util/evlist.h"
#include "util/machine.h"
#include "util/map.h"
#include "util/map_symbol.h"
#include "util/branch.h"
#include "util/memswap.h"
#include "util/namespaces.h"
#include "util/session.h"
#include "util/stat.h"
#include "util/symbol.h"
#include "util/synthetic-events.h"
#include "util/target.h"
#include "util/time-utils.h"
#include <linux/bitops.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/zalloc.h>
#include <linux/perf_event.h>
#include <asm/bug.h>
#include <perf/evsel.h>
#include <internal/cpumap.h>
#include <perf/cpumap.h>
#include <internal/lib.h> // page_size
#include <internal/threadmap.h>
#include <perf/threadmap.h>
#include <symbol/kallsyms.h>
#include <dirent.h>
#include <errno.h>
#include <inttypes.h>
#include <stdio.h>
#include <string.h>
#include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */
#include <api/fs/fs.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#define DEFAULT_PROC_MAP_PARSE_TIMEOUT 500
unsigned int proc_map_timeout = DEFAULT_PROC_MAP_PARSE_TIMEOUT;
int perf_tool__process_synth_event(struct perf_tool *tool,
union perf_event *event,
struct machine *machine,
perf_event__handler_t process)
{
struct perf_sample synth_sample = {
.pid = -1,
.tid = -1,
.time = -1,
.stream_id = -1,
.cpu = -1,
.period = 1,
.cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK,
};
return process(tool, event, &synth_sample, machine);
};
/*
* Assumes that the first 4095 bytes of /proc/pid/stat contains
* the comm, tgid and ppid.
*/
static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len,
pid_t *tgid, pid_t *ppid)
{
char filename[PATH_MAX];
char bf[4096];
int fd;
size_t size = 0;
ssize_t n;
char *name, *tgids, *ppids;
*tgid = -1;
*ppid = -1;
snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
fd = open(filename, O_RDONLY);
if (fd < 0) {
pr_debug("couldn't open %s\n", filename);
return -1;
}
n = read(fd, bf, sizeof(bf) - 1);
close(fd);
if (n <= 0) {
pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n",
pid);
return -1;
}
bf[n] = '\0';
name = strstr(bf, "Name:");
tgids = strstr(bf, "Tgid:");
ppids = strstr(bf, "PPid:");
if (name) {
char *nl;
name = skip_spaces(name + 5); /* strlen("Name:") */
nl = strchr(name, '\n');
if (nl)
*nl = '\0';
size = strlen(name);
if (size >= len)
size = len - 1;
memcpy(comm, name, size);
comm[size] = '\0';
} else {
pr_debug("Name: string not found for pid %d\n", pid);
}
if (tgids) {
tgids += 5; /* strlen("Tgid:") */
*tgid = atoi(tgids);
} else {
pr_debug("Tgid: string not found for pid %d\n", pid);
}
if (ppids) {
ppids += 5; /* strlen("PPid:") */
*ppid = atoi(ppids);
} else {
pr_debug("PPid: string not found for pid %d\n", pid);
}
return 0;
}
static int perf_event__prepare_comm(union perf_event *event, pid_t pid,
struct machine *machine,
pid_t *tgid, pid_t *ppid)
{
size_t size;
*ppid = -1;
memset(&event->comm, 0, sizeof(event->comm));
if (machine__is_host(machine)) {
if (perf_event__get_comm_ids(pid, event->comm.comm,
sizeof(event->comm.comm),
tgid, ppid) != 0) {
return -1;
}
} else {
*tgid = machine->pid;
}
if (*tgid < 0)
return -1;
event->comm.pid = *tgid;
event->comm.header.type = PERF_RECORD_COMM;
size = strlen(event->comm.comm) + 1;
size = PERF_ALIGN(size, sizeof(u64));
memset(event->comm.comm + size, 0, machine->id_hdr_size);
event->comm.header.size = (sizeof(event->comm) -
(sizeof(event->comm.comm) - size) +
machine->id_hdr_size);
event->comm.tid = pid;
return 0;
}
pid_t perf_event__synthesize_comm(struct perf_tool *tool,
union perf_event *event, pid_t pid,
perf_event__handler_t process,
struct machine *machine)
{
pid_t tgid, ppid;
if (perf_event__prepare_comm(event, pid, machine, &tgid, &ppid) != 0)
return -1;
if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
return -1;
return tgid;
}
static void perf_event__get_ns_link_info(pid_t pid, const char *ns,
struct perf_ns_link_info *ns_link_info)
{
struct stat64 st;
char proc_ns[128];
sprintf(proc_ns, "/proc/%u/ns/%s", pid, ns);
if (stat64(proc_ns, &st) == 0) {
ns_link_info->dev = st.st_dev;
ns_link_info->ino = st.st_ino;
}
}
int perf_event__synthesize_namespaces(struct perf_tool *tool,
union perf_event *event,
pid_t pid, pid_t tgid,
perf_event__handler_t process,
struct machine *machine)
{
u32 idx;
struct perf_ns_link_info *ns_link_info;
if (!tool || !tool->namespace_events)
return 0;
memset(&event->namespaces, 0, (sizeof(event->namespaces) +
(NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
machine->id_hdr_size));
event->namespaces.pid = tgid;
event->namespaces.tid = pid;
event->namespaces.nr_namespaces = NR_NAMESPACES;
ns_link_info = event->namespaces.link_info;
for (idx = 0; idx < event->namespaces.nr_namespaces; idx++)
perf_event__get_ns_link_info(pid, perf_ns__name(idx),
&ns_link_info[idx]);
event->namespaces.header.type = PERF_RECORD_NAMESPACES;
event->namespaces.header.size = (sizeof(event->namespaces) +
(NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
machine->id_hdr_size);
if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
return -1;
return 0;
}
static int perf_event__synthesize_fork(struct perf_tool *tool,
union perf_event *event,
pid_t pid, pid_t tgid, pid_t ppid,
perf_event__handler_t process,
struct machine *machine)
{
memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
/*
* for main thread set parent to ppid from status file. For other
* threads set parent pid to main thread. ie., assume main thread
* spawns all threads in a process
*/
if (tgid == pid) {
event->fork.ppid = ppid;
event->fork.ptid = ppid;
} else {
event->fork.ppid = tgid;
event->fork.ptid = tgid;
}
event->fork.pid = tgid;
event->fork.tid = pid;
event->fork.header.type = PERF_RECORD_FORK;
event->fork.header.misc = PERF_RECORD_MISC_FORK_EXEC;
event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
return -1;
return 0;
}
int perf_event__synthesize_mmap_events(struct perf_tool *tool,
union perf_event *event,
pid_t pid, pid_t tgid,
perf_event__handler_t process,
struct machine *machine,
bool mmap_data)
{
char filename[PATH_MAX];
FILE *fp;
unsigned long long t;
bool truncation = false;
unsigned long long timeout = proc_map_timeout * 1000000ULL;
int rc = 0;
const char *hugetlbfs_mnt = hugetlbfs__mountpoint();
int hugetlbfs_mnt_len = hugetlbfs_mnt ? strlen(hugetlbfs_mnt) : 0;
if (machine__is_default_guest(machine))
return 0;
snprintf(filename, sizeof(filename), "%s/proc/%d/task/%d/maps",
machine->root_dir, pid, pid);
fp = fopen(filename, "r");
if (fp == NULL) {
/*
* We raced with a task exiting - just return:
*/
pr_debug("couldn't open %s\n", filename);
return -1;
}
event->header.type = PERF_RECORD_MMAP2;
t = rdclock();
while (1) {
char bf[BUFSIZ];
char prot[5];
char execname[PATH_MAX];
char anonstr[] = "//anon";
unsigned int ino;
size_t size;
ssize_t n;
if (fgets(bf, sizeof(bf), fp) == NULL)
break;
if ((rdclock() - t) > timeout) {
pr_warning("Reading %s time out. "
"You may want to increase "
"the time limit by --proc-map-timeout\n",
filename);
truncation = true;
goto out;
}
/* ensure null termination since stack will be reused. */
strcpy(execname, "");
/* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */
n = sscanf(bf, "%"PRI_lx64"-%"PRI_lx64" %s %"PRI_lx64" %x:%x %u %[^\n]\n",
&event->mmap2.start, &event->mmap2.len, prot,
&event->mmap2.pgoff, &event->mmap2.maj,
&event->mmap2.min,
&ino, execname);
/*
* Anon maps don't have the execname.
*/
if (n < 7)
continue;
event->mmap2.ino = (u64)ino;
/*
* Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
*/
if (machine__is_host(machine))
event->header.misc = PERF_RECORD_MISC_USER;
else
event->header.misc = PERF_RECORD_MISC_GUEST_USER;
/* map protection and flags bits */
event->mmap2.prot = 0;
event->mmap2.flags = 0;
if (prot[0] == 'r')
event->mmap2.prot |= PROT_READ;
if (prot[1] == 'w')
event->mmap2.prot |= PROT_WRITE;
if (prot[2] == 'x')
event->mmap2.prot |= PROT_EXEC;
if (prot[3] == 's')
event->mmap2.flags |= MAP_SHARED;
else
event->mmap2.flags |= MAP_PRIVATE;
if (prot[2] != 'x') {
if (!mmap_data || prot[0] != 'r')
continue;
event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
}
out:
if (truncation)
event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT;
if (!strcmp(execname, ""))
strcpy(execname, anonstr);
if (hugetlbfs_mnt_len &&
!strncmp(execname, hugetlbfs_mnt, hugetlbfs_mnt_len)) {
strcpy(execname, anonstr);
event->mmap2.flags |= MAP_HUGETLB;
}
size = strlen(execname) + 1;
memcpy(event->mmap2.filename, execname, size);
size = PERF_ALIGN(size, sizeof(u64));
event->mmap2.len -= event->mmap.start;
event->mmap2.header.size = (sizeof(event->mmap2) -
(sizeof(event->mmap2.filename) - size));
memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
event->mmap2.header.size += machine->id_hdr_size;
event->mmap2.pid = tgid;
event->mmap2.tid = pid;
if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
rc = -1;
break;
}
if (truncation)
break;
}
fclose(fp);
return rc;
}
int perf_event__synthesize_modules(struct perf_tool *tool, perf_event__handler_t process,
struct machine *machine)
{
int rc = 0;
struct map *pos;
struct maps *maps = machine__kernel_maps(machine);
union perf_event *event = zalloc((sizeof(event->mmap) +
machine->id_hdr_size));
if (event == NULL) {
pr_debug("Not enough memory synthesizing mmap event "
"for kernel modules\n");
return -1;
}
event->header.type = PERF_RECORD_MMAP;
/*
* kernel uses 0 for user space maps, see kernel/perf_event.c
* __perf_event_mmap
*/
if (machine__is_host(machine))
event->header.misc = PERF_RECORD_MISC_KERNEL;
else
event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
maps__for_each_entry(maps, pos) {
size_t size;
if (!__map__is_kmodule(pos))
continue;
size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
event->mmap.header.type = PERF_RECORD_MMAP;
event->mmap.header.size = (sizeof(event->mmap) -
(sizeof(event->mmap.filename) - size));
memset(event->mmap.filename + size, 0, machine->id_hdr_size);
event->mmap.header.size += machine->id_hdr_size;
event->mmap.start = pos->start;
event->mmap.len = pos->end - pos->start;
event->mmap.pid = machine->pid;
memcpy(event->mmap.filename, pos->dso->long_name,
pos->dso->long_name_len + 1);
if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
rc = -1;
break;
}
}
free(event);
return rc;
}
static int __event__synthesize_thread(union perf_event *comm_event,
union perf_event *mmap_event,
union perf_event *fork_event,
union perf_event *namespaces_event,
pid_t pid, int full, perf_event__handler_t process,
struct perf_tool *tool, struct machine *machine, bool mmap_data)
{
char filename[PATH_MAX];
DIR *tasks;
struct dirent *dirent;
pid_t tgid, ppid;
int rc = 0;
/* special case: only send one comm event using passed in pid */
if (!full) {
tgid = perf_event__synthesize_comm(tool, comm_event, pid,
process, machine);
if (tgid == -1)
return -1;
if (perf_event__synthesize_namespaces(tool, namespaces_event, pid,
tgid, process, machine) < 0)
return -1;
/*
* send mmap only for thread group leader
* see thread__init_maps()
*/
if (pid == tgid &&
perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
process, machine, mmap_data))
return -1;
return 0;
}
if (machine__is_default_guest(machine))
return 0;
snprintf(filename, sizeof(filename), "%s/proc/%d/task",
machine->root_dir, pid);
tasks = opendir(filename);
if (tasks == NULL) {
pr_debug("couldn't open %s\n", filename);
return 0;
}
while ((dirent = readdir(tasks)) != NULL) {
char *end;
pid_t _pid;
_pid = strtol(dirent->d_name, &end, 10);
if (*end)
continue;
rc = -1;
if (perf_event__prepare_comm(comm_event, _pid, machine,
&tgid, &ppid) != 0)
break;
if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
ppid, process, machine) < 0)
break;
if (perf_event__synthesize_namespaces(tool, namespaces_event, _pid,
tgid, process, machine) < 0)
break;
/*
* Send the prepared comm event
*/
if (perf_tool__process_synth_event(tool, comm_event, machine, process) != 0)
break;
rc = 0;
if (_pid == pid) {
/* process the parent's maps too */
rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
process, machine, mmap_data);
if (rc)
break;
}
}
closedir(tasks);
return rc;
}
int perf_event__synthesize_thread_map(struct perf_tool *tool,
struct perf_thread_map *threads,
perf_event__handler_t process,
struct machine *machine,
bool mmap_data)
{
union perf_event *comm_event, *mmap_event, *fork_event;
union perf_event *namespaces_event;
int err = -1, thread, j;
comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
if (comm_event == NULL)
goto out;
mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
if (mmap_event == NULL)
goto out_free_comm;
fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
if (fork_event == NULL)
goto out_free_mmap;
namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
(NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
machine->id_hdr_size);
if (namespaces_event == NULL)
goto out_free_fork;
err = 0;
for (thread = 0; thread < threads->nr; ++thread) {
if (__event__synthesize_thread(comm_event, mmap_event,
fork_event, namespaces_event,
perf_thread_map__pid(threads, thread), 0,
process, tool, machine,
mmap_data)) {
err = -1;
break;
}
/*
* comm.pid is set to thread group id by
* perf_event__synthesize_comm
*/
if ((int) comm_event->comm.pid != perf_thread_map__pid(threads, thread)) {
bool need_leader = true;
/* is thread group leader in thread_map? */
for (j = 0; j < threads->nr; ++j) {
if ((int) comm_event->comm.pid == perf_thread_map__pid(threads, j)) {
need_leader = false;
break;
}
}
/* if not, generate events for it */
if (need_leader &&
__event__synthesize_thread(comm_event, mmap_event,
fork_event, namespaces_event,
comm_event->comm.pid, 0,
process, tool, machine,
mmap_data)) {
err = -1;
break;
}
}
}
free(namespaces_event);
out_free_fork:
free(fork_event);
out_free_mmap:
free(mmap_event);
out_free_comm:
free(comm_event);
out:
return err;
}
static int __perf_event__synthesize_threads(struct perf_tool *tool,
perf_event__handler_t process,
struct machine *machine,
bool mmap_data,
struct dirent **dirent,
int start,
int num)
{
union perf_event *comm_event, *mmap_event, *fork_event;
union perf_event *namespaces_event;
int err = -1;
char *end;
pid_t pid;
int i;
comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
if (comm_event == NULL)
goto out;
mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
if (mmap_event == NULL)
goto out_free_comm;
fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
if (fork_event == NULL)
goto out_free_mmap;
namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
(NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
machine->id_hdr_size);
if (namespaces_event == NULL)
goto out_free_fork;
for (i = start; i < start + num; i++) {
if (!isdigit(dirent[i]->d_name[0]))
continue;
pid = (pid_t)strtol(dirent[i]->d_name, &end, 10);
/* only interested in proper numerical dirents */
if (*end)
continue;
/*
* We may race with exiting thread, so don't stop just because
* one thread couldn't be synthesized.
*/
__event__synthesize_thread(comm_event, mmap_event, fork_event,
namespaces_event, pid, 1, process,
tool, machine, mmap_data);
}
err = 0;
free(namespaces_event);
out_free_fork:
free(fork_event);
out_free_mmap:
free(mmap_event);
out_free_comm:
free(comm_event);
out:
return err;
}
struct synthesize_threads_arg {
struct perf_tool *tool;
perf_event__handler_t process;
struct machine *machine;
bool mmap_data;
struct dirent **dirent;
int num;
int start;
};
static void *synthesize_threads_worker(void *arg)
{
struct synthesize_threads_arg *args = arg;
__perf_event__synthesize_threads(args->tool, args->process,
args->machine, args->mmap_data,
args->dirent,
args->start, args->num);
return NULL;
}
int perf_event__synthesize_threads(struct perf_tool *tool,
perf_event__handler_t process,
struct machine *machine,
bool mmap_data,
unsigned int nr_threads_synthesize)
{
struct synthesize_threads_arg *args = NULL;
pthread_t *synthesize_threads = NULL;
char proc_path[PATH_MAX];
struct dirent **dirent;
int num_per_thread;
int m, n, i, j;
int thread_nr;
int base = 0;
int err = -1;
if (machine__is_default_guest(machine))
return 0;
snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
n = scandir(proc_path, &dirent, 0, alphasort);
if (n < 0)
return err;
if (nr_threads_synthesize == UINT_MAX)
thread_nr = sysconf(_SC_NPROCESSORS_ONLN);
else
thread_nr = nr_threads_synthesize;
if (thread_nr <= 1) {
err = __perf_event__synthesize_threads(tool, process,
machine, mmap_data,
dirent, base, n);
goto free_dirent;
}
if (thread_nr > n)
thread_nr = n;
synthesize_threads = calloc(sizeof(pthread_t), thread_nr);
if (synthesize_threads == NULL)
goto free_dirent;
args = calloc(sizeof(*args), thread_nr);
if (args == NULL)
goto free_threads;
num_per_thread = n / thread_nr;
m = n % thread_nr;
for (i = 0; i < thread_nr; i++) {
args[i].tool = tool;
args[i].process = process;
args[i].machine = machine;
args[i].mmap_data = mmap_data;
args[i].dirent = dirent;
}
for (i = 0; i < m; i++) {
args[i].num = num_per_thread + 1;
args[i].start = i * args[i].num;
}
if (i != 0)
base = args[i-1].start + args[i-1].num;
for (j = i; j < thread_nr; j++) {
args[j].num = num_per_thread;
args[j].start = base + (j - i) * args[i].num;
}
for (i = 0; i < thread_nr; i++) {
if (pthread_create(&synthesize_threads[i], NULL,
synthesize_threads_worker, &args[i]))
goto out_join;
}
err = 0;
out_join:
for (i = 0; i < thread_nr; i++)
pthread_join(synthesize_threads[i], NULL);
free(args);
free_threads:
free(synthesize_threads);
free_dirent:
for (i = 0; i < n; i++)
zfree(&dirent[i]);
free(dirent);
return err;
}
int __weak perf_event__synthesize_extra_kmaps(struct perf_tool *tool __maybe_unused,
perf_event__handler_t process __maybe_unused,
struct machine *machine __maybe_unused)
{
return 0;
}
static int __perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
perf_event__handler_t process,
struct machine *machine)
{
size_t size;
struct map *map = machine__kernel_map(machine);
struct kmap *kmap;
int err;
union perf_event *event;
if (map == NULL)
return -1;
kmap = map__kmap(map);
if (!kmap->ref_reloc_sym)
return -1;
/*
* We should get this from /sys/kernel/sections/.text, but till that is
* available use this, and after it is use this as a fallback for older
* kernels.
*/
event = zalloc((sizeof(event->mmap) + machine->id_hdr_size));
if (event == NULL) {
pr_debug("Not enough memory synthesizing mmap event "
"for kernel modules\n");
return -1;
}
if (machine__is_host(machine)) {
/*
* kernel uses PERF_RECORD_MISC_USER for user space maps,
* see kernel/perf_event.c __perf_event_mmap
*/
event->header.misc = PERF_RECORD_MISC_KERNEL;
} else {
event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
}
size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
"%s%s", machine->mmap_name, kmap->ref_reloc_sym->name) + 1;
size = PERF_ALIGN(size, sizeof(u64));
event->mmap.header.type = PERF_RECORD_MMAP;
event->mmap.header.size = (sizeof(event->mmap) -
(sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
event->mmap.pgoff = kmap->ref_reloc_sym->addr;
event->mmap.start = map->start;
event->mmap.len = map->end - event->mmap.start;
event->mmap.pid = machine->pid;
err = perf_tool__process_synth_event(tool, event, machine, process);
free(event);
return err;
}
int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
perf_event__handler_t process,
struct machine *machine)
{
int err;
err = __perf_event__synthesize_kernel_mmap(tool, process, machine);
if (err < 0)
return err;
return perf_event__synthesize_extra_kmaps(tool, process, machine);
}
int perf_event__synthesize_thread_map2(struct perf_tool *tool,
struct perf_thread_map *threads,
perf_event__handler_t process,
struct machine *machine)
{
union perf_event *event;
int i, err, size;
size = sizeof(event->thread_map);
size += threads->nr * sizeof(event->thread_map.entries[0]);
event = zalloc(size);
if (!event)
return -ENOMEM;
event->header.type = PERF_RECORD_THREAD_MAP;
event->header.size = size;
event->thread_map.nr = threads->nr;
for (i = 0; i < threads->nr; i++) {
struct perf_record_thread_map_entry *entry = &event->thread_map.entries[i];
char *comm = perf_thread_map__comm(threads, i);
if (!comm)
comm = (char *) "";
entry->pid = perf_thread_map__pid(threads, i);
strncpy((char *) &entry->comm, comm, sizeof(entry->comm));
}
err = process(tool, event, NULL, machine);
free(event);
return err;
}
static void synthesize_cpus(struct cpu_map_entries *cpus,
struct perf_cpu_map *map)
{
int i;
cpus->nr = map->nr;
for (i = 0; i < map->nr; i++)
cpus->cpu[i] = map->map[i];
}
static void synthesize_mask(struct perf_record_record_cpu_map *mask,
struct perf_cpu_map *map, int max)
{
int i;
mask->nr = BITS_TO_LONGS(max);
mask->long_size = sizeof(long);
for (i = 0; i < map->nr; i++)
set_bit(map->map[i], mask->mask);
}
static size_t cpus_size(struct perf_cpu_map *map)
{
return sizeof(struct cpu_map_entries) + map->nr * sizeof(u16);
}
static size_t mask_size(struct perf_cpu_map *map, int *max)
{
int i;
*max = 0;
for (i = 0; i < map->nr; i++) {
/* bit possition of the cpu is + 1 */
int bit = map->map[i] + 1;
if (bit > *max)
*max = bit;
}
return sizeof(struct perf_record_record_cpu_map) + BITS_TO_LONGS(*max) * sizeof(long);
}
void *cpu_map_data__alloc(struct perf_cpu_map *map, size_t *size, u16 *type, int *max)
{
size_t size_cpus, size_mask;
bool is_dummy = perf_cpu_map__empty(map);
/*
* Both array and mask data have variable size based
* on the number of cpus and their actual values.
* The size of the 'struct perf_record_cpu_map_data' is:
*
* array = size of 'struct cpu_map_entries' +
* number of cpus * sizeof(u64)
*
* mask = size of 'struct perf_record_record_cpu_map' +
* maximum cpu bit converted to size of longs
*
* and finaly + the size of 'struct perf_record_cpu_map_data'.
*/
size_cpus = cpus_size(map);
size_mask = mask_size(map, max);
if (is_dummy || (size_cpus < size_mask)) {
*size += size_cpus;
*type = PERF_CPU_MAP__CPUS;
} else {
*size += size_mask;
*type = PERF_CPU_MAP__MASK;
}
*size += sizeof(struct perf_record_cpu_map_data);
*size = PERF_ALIGN(*size, sizeof(u64));
return zalloc(*size);
}
void cpu_map_data__synthesize(struct perf_record_cpu_map_data *data, struct perf_cpu_map *map,
u16 type, int max)
{
data->type = type;
switch (type) {
case PERF_CPU_MAP__CPUS:
synthesize_cpus((struct cpu_map_entries *) data->data, map);
break;
case PERF_CPU_MAP__MASK:
synthesize_mask((struct perf_record_record_cpu_map *)data->data, map, max);
default:
break;
};
}
static struct perf_record_cpu_map *cpu_map_event__new(struct perf_cpu_map *map)
{
size_t size = sizeof(struct perf_record_cpu_map);
struct perf_record_cpu_map *event;
int max;
u16 type;
event = cpu_map_data__alloc(map, &size, &type, &max);
if (!event)
return NULL;
event->header.type = PERF_RECORD_CPU_MAP;
event->header.size = size;
event->data.type = type;
cpu_map_data__synthesize(&event->data, map, type, max);
return event;
}
int perf_event__synthesize_cpu_map(struct perf_tool *tool,
struct perf_cpu_map *map,
perf_event__handler_t process,
struct machine *machine)
{
struct perf_record_cpu_map *event;
int err;
event = cpu_map_event__new(map);
if (!event)
return -ENOMEM;
err = process(tool, (union perf_event *) event, NULL, machine);
free(event);
return err;
}
int perf_event__synthesize_stat_config(struct perf_tool *tool,
struct perf_stat_config *config,
perf_event__handler_t process,
struct machine *machine)
{
struct perf_record_stat_config *event;
int size, i = 0, err;
size = sizeof(*event);
size += (PERF_STAT_CONFIG_TERM__MAX * sizeof(event->data[0]));
event = zalloc(size);
if (!event)
return -ENOMEM;
event->header.type = PERF_RECORD_STAT_CONFIG;
event->header.size = size;
event->nr = PERF_STAT_CONFIG_TERM__MAX;
#define ADD(__term, __val) \
event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term; \
event->data[i].val = __val; \
i++;
ADD(AGGR_MODE, config->aggr_mode)
ADD(INTERVAL, config->interval)
ADD(SCALE, config->scale)
WARN_ONCE(i != PERF_STAT_CONFIG_TERM__MAX,
"stat config terms unbalanced\n");
#undef ADD
err = process(tool, (union perf_event *) event, NULL, machine);
free(event);
return err;
}
int perf_event__synthesize_stat(struct perf_tool *tool,
u32 cpu, u32 thread, u64 id,
struct perf_counts_values *count,
perf_event__handler_t process,
struct machine *machine)
{
struct perf_record_stat event;
event.header.type = PERF_RECORD_STAT;
event.header.size = sizeof(event);
event.header.misc = 0;
event.id = id;
event.cpu = cpu;
event.thread = thread;
event.val = count->val;
event.ena = count->ena;
event.run = count->run;
return process(tool, (union perf_event *) &event, NULL, machine);
}
int perf_event__synthesize_stat_round(struct perf_tool *tool,
u64 evtime, u64 type,
perf_event__handler_t process,
struct machine *machine)
{
struct perf_record_stat_round event;
event.header.type = PERF_RECORD_STAT_ROUND;
event.header.size = sizeof(event);
event.header.misc = 0;
event.time = evtime;
event.type = type;
return process(tool, (union perf_event *) &event, NULL, machine);
}
size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type, u64 read_format)
{
size_t sz, result = sizeof(struct perf_record_sample);
if (type & PERF_SAMPLE_IDENTIFIER)
result += sizeof(u64);
if (type & PERF_SAMPLE_IP)
result += sizeof(u64);
if (type & PERF_SAMPLE_TID)
result += sizeof(u64);
if (type & PERF_SAMPLE_TIME)
result += sizeof(u64);
if (type & PERF_SAMPLE_ADDR)
result += sizeof(u64);
if (type & PERF_SAMPLE_ID)
result += sizeof(u64);
if (type & PERF_SAMPLE_STREAM_ID)
result += sizeof(u64);
if (type & PERF_SAMPLE_CPU)
result += sizeof(u64);
if (type & PERF_SAMPLE_PERIOD)
result += sizeof(u64);
if (type & PERF_SAMPLE_READ) {
result += sizeof(u64);
if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
result += sizeof(u64);
if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
result += sizeof(u64);
/* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
if (read_format & PERF_FORMAT_GROUP) {
sz = sample->read.group.nr *
sizeof(struct sample_read_value);
result += sz;
} else {
result += sizeof(u64);
}
}
if (type & PERF_SAMPLE_CALLCHAIN) {
sz = (sample->callchain->nr + 1) * sizeof(u64);
result += sz;
}
if (type & PERF_SAMPLE_RAW) {
result += sizeof(u32);
result += sample->raw_size;
}
if (type & PERF_SAMPLE_BRANCH_STACK) {
sz = sample->branch_stack->nr * sizeof(struct branch_entry);
sz += sizeof(u64);
result += sz;
}
if (type & PERF_SAMPLE_REGS_USER) {
if (sample->user_regs.abi) {
result += sizeof(u64);
sz = hweight64(sample->user_regs.mask) * sizeof(u64);
result += sz;
} else {
result += sizeof(u64);
}
}
if (type & PERF_SAMPLE_STACK_USER) {
sz = sample->user_stack.size;
result += sizeof(u64);
if (sz) {
result += sz;
result += sizeof(u64);
}
}
if (type & PERF_SAMPLE_WEIGHT)
result += sizeof(u64);
if (type & PERF_SAMPLE_DATA_SRC)
result += sizeof(u64);
if (type & PERF_SAMPLE_TRANSACTION)
result += sizeof(u64);
if (type & PERF_SAMPLE_REGS_INTR) {
if (sample->intr_regs.abi) {
result += sizeof(u64);
sz = hweight64(sample->intr_regs.mask) * sizeof(u64);
result += sz;
} else {
result += sizeof(u64);
}
}
if (type & PERF_SAMPLE_PHYS_ADDR)
result += sizeof(u64);
if (type & PERF_SAMPLE_AUX) {
result += sizeof(u64);
result += sample->aux_sample.size;
}
return result;
}
int perf_event__synthesize_sample(union perf_event *event, u64 type, u64 read_format,
const struct perf_sample *sample)
{
__u64 *array;
size_t sz;
/*
* used for cross-endian analysis. See git commit 65014ab3
* for why this goofiness is needed.
*/
union u64_swap u;
array = event->sample.array;
if (type & PERF_SAMPLE_IDENTIFIER) {
*array = sample->id;
array++;
}
if (type & PERF_SAMPLE_IP) {
*array = sample->ip;
array++;
}
if (type & PERF_SAMPLE_TID) {
u.val32[0] = sample->pid;
u.val32[1] = sample->tid;
*array = u.val64;
array++;
}
if (type & PERF_SAMPLE_TIME) {
*array = sample->time;
array++;
}
if (type & PERF_SAMPLE_ADDR) {
*array = sample->addr;
array++;
}
if (type & PERF_SAMPLE_ID) {
*array = sample->id;
array++;
}
if (type & PERF_SAMPLE_STREAM_ID) {
*array = sample->stream_id;
array++;
}
if (type & PERF_SAMPLE_CPU) {
u.val32[0] = sample->cpu;
u.val32[1] = 0;
*array = u.val64;
array++;
}
if (type & PERF_SAMPLE_PERIOD) {
*array = sample->period;
array++;
}
if (type & PERF_SAMPLE_READ) {
if (read_format & PERF_FORMAT_GROUP)
*array = sample->read.group.nr;
else
*array = sample->read.one.value;
array++;
if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
*array = sample->read.time_enabled;
array++;
}
if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
*array = sample->read.time_running;
array++;
}
/* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
if (read_format & PERF_FORMAT_GROUP) {
sz = sample->read.group.nr *
sizeof(struct sample_read_value);
memcpy(array, sample->read.group.values, sz);
array = (void *)array + sz;
} else {
*array = sample->read.one.id;
array++;
}
}
if (type & PERF_SAMPLE_CALLCHAIN) {
sz = (sample->callchain->nr + 1) * sizeof(u64);
memcpy(array, sample->callchain, sz);
array = (void *)array + sz;
}
if (type & PERF_SAMPLE_RAW) {
u.val32[0] = sample->raw_size;
*array = u.val64;
array = (void *)array + sizeof(u32);
memcpy(array, sample->raw_data, sample->raw_size);
array = (void *)array + sample->raw_size;
}
if (type & PERF_SAMPLE_BRANCH_STACK) {
sz = sample->branch_stack->nr * sizeof(struct branch_entry);
sz += sizeof(u64);
memcpy(array, sample->branch_stack, sz);
array = (void *)array + sz;
}
if (type & PERF_SAMPLE_REGS_USER) {
if (sample->user_regs.abi) {
*array++ = sample->user_regs.abi;
sz = hweight64(sample->user_regs.mask) * sizeof(u64);
memcpy(array, sample->user_regs.regs, sz);
array = (void *)array + sz;
} else {
*array++ = 0;
}
}
if (type & PERF_SAMPLE_STACK_USER) {
sz = sample->user_stack.size;
*array++ = sz;
if (sz) {
memcpy(array, sample->user_stack.data, sz);
array = (void *)array + sz;
*array++ = sz;
}
}
if (type & PERF_SAMPLE_WEIGHT) {
*array = sample->weight;
array++;
}
if (type & PERF_SAMPLE_DATA_SRC) {
*array = sample->data_src;
array++;
}
if (type & PERF_SAMPLE_TRANSACTION) {
*array = sample->transaction;
array++;
}
if (type & PERF_SAMPLE_REGS_INTR) {
if (sample->intr_regs.abi) {
*array++ = sample->intr_regs.abi;
sz = hweight64(sample->intr_regs.mask) * sizeof(u64);
memcpy(array, sample->intr_regs.regs, sz);
array = (void *)array + sz;
} else {
*array++ = 0;
}
}
if (type & PERF_SAMPLE_PHYS_ADDR) {
*array = sample->phys_addr;
array++;
}
if (type & PERF_SAMPLE_AUX) {
sz = sample->aux_sample.size;
*array++ = sz;
memcpy(array, sample->aux_sample.data, sz);
array = (void *)array + sz;
}
return 0;
}
int perf_event__synthesize_id_index(struct perf_tool *tool, perf_event__handler_t process,
struct evlist *evlist, struct machine *machine)
{
union perf_event *ev;
struct evsel *evsel;
size_t nr = 0, i = 0, sz, max_nr, n;
int err;
pr_debug2("Synthesizing id index\n");
max_nr = (UINT16_MAX - sizeof(struct perf_record_id_index)) /
sizeof(struct id_index_entry);
evlist__for_each_entry(evlist, evsel)
nr += evsel->core.ids;
n = nr > max_nr ? max_nr : nr;
sz = sizeof(struct perf_record_id_index) + n * sizeof(struct id_index_entry);
ev = zalloc(sz);
if (!ev)
return -ENOMEM;
ev->id_index.header.type = PERF_RECORD_ID_INDEX;
ev->id_index.header.size = sz;
ev->id_index.nr = n;
evlist__for_each_entry(evlist, evsel) {
u32 j;
for (j = 0; j < evsel->core.ids; j++) {
struct id_index_entry *e;
struct perf_sample_id *sid;
if (i >= n) {
err = process(tool, ev, NULL, machine);
if (err)
goto out_err;
nr -= n;
i = 0;
}
e = &ev->id_index.entries[i++];
e->id = evsel->core.id[j];
sid = perf_evlist__id2sid(evlist, e->id);
if (!sid) {
free(ev);
return -ENOENT;
}
e->idx = sid->idx;
e->cpu = sid->cpu;
e->tid = sid->tid;
}
}
sz = sizeof(struct perf_record_id_index) + nr * sizeof(struct id_index_entry);
ev->id_index.header.size = sz;
ev->id_index.nr = nr;
err = process(tool, ev, NULL, machine);
out_err:
free(ev);
return err;
}
int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool,
struct target *target, struct perf_thread_map *threads,
perf_event__handler_t process, bool data_mmap,
unsigned int nr_threads_synthesize)
{
if (target__has_task(target))
return perf_event__synthesize_thread_map(tool, threads, process, machine, data_mmap);
else if (target__has_cpu(target))
return perf_event__synthesize_threads(tool, process,
machine, data_mmap,
nr_threads_synthesize);
/* command specified */
return 0;
}
int machine__synthesize_threads(struct machine *machine, struct target *target,
struct perf_thread_map *threads, bool data_mmap,
unsigned int nr_threads_synthesize)
{
return __machine__synthesize_threads(machine, NULL, target, threads,
perf_event__process, data_mmap,
nr_threads_synthesize);
}
static struct perf_record_event_update *event_update_event__new(size_t size, u64 type, u64 id)
{
struct perf_record_event_update *ev;
size += sizeof(*ev);
size = PERF_ALIGN(size, sizeof(u64));
ev = zalloc(size);
if (ev) {
ev->header.type = PERF_RECORD_EVENT_UPDATE;
ev->header.size = (u16)size;
ev->type = type;
ev->id = id;
}
return ev;
}
int perf_event__synthesize_event_update_unit(struct perf_tool *tool, struct evsel *evsel,
perf_event__handler_t process)
{
size_t size = strlen(evsel->unit);
struct perf_record_event_update *ev;
int err;
ev = event_update_event__new(size + 1, PERF_EVENT_UPDATE__UNIT, evsel->core.id[0]);
if (ev == NULL)
return -ENOMEM;
strlcpy(ev->data, evsel->unit, size + 1);
err = process(tool, (union perf_event *)ev, NULL, NULL);
free(ev);
return err;
}
int perf_event__synthesize_event_update_scale(struct perf_tool *tool, struct evsel *evsel,
perf_event__handler_t process)
{
struct perf_record_event_update *ev;
struct perf_record_event_update_scale *ev_data;
int err;
ev = event_update_event__new(sizeof(*ev_data), PERF_EVENT_UPDATE__SCALE, evsel->core.id[0]);
if (ev == NULL)
return -ENOMEM;
ev_data = (struct perf_record_event_update_scale *)ev->data;
ev_data->scale = evsel->scale;
err = process(tool, (union perf_event *)ev, NULL, NULL);
free(ev);
return err;
}
int perf_event__synthesize_event_update_name(struct perf_tool *tool, struct evsel *evsel,
perf_event__handler_t process)
{
struct perf_record_event_update *ev;
size_t len = strlen(evsel->name);
int err;
ev = event_update_event__new(len + 1, PERF_EVENT_UPDATE__NAME, evsel->core.id[0]);
if (ev == NULL)
return -ENOMEM;
strlcpy(ev->data, evsel->name, len + 1);
err = process(tool, (union perf_event *)ev, NULL, NULL);
free(ev);
return err;
}
int perf_event__synthesize_event_update_cpus(struct perf_tool *tool, struct evsel *evsel,
perf_event__handler_t process)
{
size_t size = sizeof(struct perf_record_event_update);
struct perf_record_event_update *ev;
int max, err;
u16 type;
if (!evsel->core.own_cpus)
return 0;
ev = cpu_map_data__alloc(evsel->core.own_cpus, &size, &type, &max);
if (!ev)
return -ENOMEM;
ev->header.type = PERF_RECORD_EVENT_UPDATE;
ev->header.size = (u16)size;
ev->type = PERF_EVENT_UPDATE__CPUS;
ev->id = evsel->core.id[0];
cpu_map_data__synthesize((struct perf_record_cpu_map_data *)ev->data,
evsel->core.own_cpus, type, max);
err = process(tool, (union perf_event *)ev, NULL, NULL);
free(ev);
return err;
}
int perf_event__synthesize_attrs(struct perf_tool *tool, struct evlist *evlist,
perf_event__handler_t process)
{
struct evsel *evsel;
int err = 0;
evlist__for_each_entry(evlist, evsel) {
err = perf_event__synthesize_attr(tool, &evsel->core.attr, evsel->core.ids,
evsel->core.id, process);
if (err) {
pr_debug("failed to create perf header attribute\n");
return err;
}
}
return err;
}
static bool has_unit(struct evsel *evsel)
{
return evsel->unit && *evsel->unit;
}
static bool has_scale(struct evsel *evsel)
{
return evsel->scale != 1;
}
int perf_event__synthesize_extra_attr(struct perf_tool *tool, struct evlist *evsel_list,
perf_event__handler_t process, bool is_pipe)
{
struct evsel *evsel;
int err;
/*
* Synthesize other events stuff not carried within
* attr event - unit, scale, name
*/
evlist__for_each_entry(evsel_list, evsel) {
if (!evsel->supported)
continue;
/*
* Synthesize unit and scale only if it's defined.
*/
if (has_unit(evsel)) {
err = perf_event__synthesize_event_update_unit(tool, evsel, process);
if (err < 0) {
pr_err("Couldn't synthesize evsel unit.\n");
return err;
}
}
if (has_scale(evsel)) {
err = perf_event__synthesize_event_update_scale(tool, evsel, process);
if (err < 0) {
pr_err("Couldn't synthesize evsel evsel.\n");
return err;
}
}
if (evsel->core.own_cpus) {
err = perf_event__synthesize_event_update_cpus(tool, evsel, process);
if (err < 0) {
pr_err("Couldn't synthesize evsel cpus.\n");
return err;
}
}
/*
* Name is needed only for pipe output,
* perf.data carries event names.
*/
if (is_pipe) {
err = perf_event__synthesize_event_update_name(tool, evsel, process);
if (err < 0) {
pr_err("Couldn't synthesize evsel name.\n");
return err;
}
}
}
return 0;
}
int perf_event__synthesize_attr(struct perf_tool *tool, struct perf_event_attr *attr,
u32 ids, u64 *id, perf_event__handler_t process)
{
union perf_event *ev;
size_t size;
int err;
size = sizeof(struct perf_event_attr);
size = PERF_ALIGN(size, sizeof(u64));
size += sizeof(struct perf_event_header);
size += ids * sizeof(u64);
ev = zalloc(size);
if (ev == NULL)
return -ENOMEM;
ev->attr.attr = *attr;
memcpy(ev->attr.id, id, ids * sizeof(u64));
ev->attr.header.type = PERF_RECORD_HEADER_ATTR;
ev->attr.header.size = (u16)size;
if (ev->attr.header.size == size)
err = process(tool, ev, NULL, NULL);
else
err = -E2BIG;
free(ev);
return err;
}
int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd, struct evlist *evlist,
perf_event__handler_t process)
{
union perf_event ev;
struct tracing_data *tdata;
ssize_t size = 0, aligned_size = 0, padding;
struct feat_fd ff;
/*
* We are going to store the size of the data followed
* by the data contents. Since the fd descriptor is a pipe,
* we cannot seek back to store the size of the data once
* we know it. Instead we:
*
* - write the tracing data to the temp file
* - get/write the data size to pipe
* - write the tracing data from the temp file
* to the pipe
*/
tdata = tracing_data_get(&evlist->core.entries, fd, true);
if (!tdata)
return -1;
memset(&ev, 0, sizeof(ev));
ev.tracing_data.header.type = PERF_RECORD_HEADER_TRACING_DATA;
size = tdata->size;
aligned_size = PERF_ALIGN(size, sizeof(u64));
padding = aligned_size - size;
ev.tracing_data.header.size = sizeof(ev.tracing_data);
ev.tracing_data.size = aligned_size;
process(tool, &ev, NULL, NULL);
/*
* The put function will copy all the tracing data
* stored in temp file to the pipe.
*/
tracing_data_put(tdata);
ff = (struct feat_fd){ .fd = fd };
if (write_padded(&ff, NULL, 0, padding))
return -1;
return aligned_size;
}
int perf_event__synthesize_build_id(struct perf_tool *tool, struct dso *pos, u16 misc,
perf_event__handler_t process, struct machine *machine)
{
union perf_event ev;
size_t len;
if (!pos->hit)
return 0;
memset(&ev, 0, sizeof(ev));
len = pos->long_name_len + 1;
len = PERF_ALIGN(len, NAME_ALIGN);
memcpy(&ev.build_id.build_id, pos->build_id, sizeof(pos->build_id));
ev.build_id.header.type = PERF_RECORD_HEADER_BUILD_ID;
ev.build_id.header.misc = misc;
ev.build_id.pid = machine->pid;
ev.build_id.header.size = sizeof(ev.build_id) + len;
memcpy(&ev.build_id.filename, pos->long_name, pos->long_name_len);
return process(tool, &ev, NULL, machine);
}
int perf_event__synthesize_stat_events(struct perf_stat_config *config, struct perf_tool *tool,
struct evlist *evlist, perf_event__handler_t process, bool attrs)
{
int err;
if (attrs) {
err = perf_event__synthesize_attrs(tool, evlist, process);
if (err < 0) {
pr_err("Couldn't synthesize attrs.\n");
return err;
}
}
err = perf_event__synthesize_extra_attr(tool, evlist, process, attrs);
err = perf_event__synthesize_thread_map2(tool, evlist->core.threads, process, NULL);
if (err < 0) {
pr_err("Couldn't synthesize thread map.\n");
return err;
}
err = perf_event__synthesize_cpu_map(tool, evlist->core.cpus, process, NULL);
if (err < 0) {
pr_err("Couldn't synthesize thread map.\n");
return err;
}
err = perf_event__synthesize_stat_config(tool, config, process, NULL);
if (err < 0) {
pr_err("Couldn't synthesize config.\n");
return err;
}
return 0;
}
int __weak perf_event__synth_time_conv(const struct perf_event_mmap_page *pc __maybe_unused,
struct perf_tool *tool __maybe_unused,
perf_event__handler_t process __maybe_unused,
struct machine *machine __maybe_unused)
{
return 0;
}
extern const struct perf_header_feature_ops feat_ops[HEADER_LAST_FEATURE];
int perf_event__synthesize_features(struct perf_tool *tool, struct perf_session *session,
struct evlist *evlist, perf_event__handler_t process)
{
struct perf_header *header = &session->header;
struct perf_record_header_feature *fe;
struct feat_fd ff;
size_t sz, sz_hdr;
int feat, ret;
sz_hdr = sizeof(fe->header);
sz = sizeof(union perf_event);
/* get a nice alignment */
sz = PERF_ALIGN(sz, page_size);
memset(&ff, 0, sizeof(ff));
ff.buf = malloc(sz);
if (!ff.buf)
return -ENOMEM;
ff.size = sz - sz_hdr;
ff.ph = &session->header;
for_each_set_bit(feat, header->adds_features, HEADER_FEAT_BITS) {
if (!feat_ops[feat].synthesize) {
pr_debug("No record header feature for header :%d\n", feat);
continue;
}
ff.offset = sizeof(*fe);
ret = feat_ops[feat].write(&ff, evlist);
if (ret || ff.offset <= (ssize_t)sizeof(*fe)) {
pr_debug("Error writing feature\n");
continue;
}
/* ff.buf may have changed due to realloc in do_write() */
fe = ff.buf;
memset(fe, 0, sizeof(*fe));
fe->feat_id = feat;
fe->header.type = PERF_RECORD_HEADER_FEATURE;
fe->header.size = ff.offset;
ret = process(tool, ff.buf, NULL, NULL);
if (ret) {
free(ff.buf);
return ret;
}
}
/* Send HEADER_LAST_FEATURE mark. */
fe = ff.buf;
fe->feat_id = HEADER_LAST_FEATURE;
fe->header.type = PERF_RECORD_HEADER_FEATURE;
fe->header.size = sizeof(*fe);
ret = process(tool, ff.buf, NULL, NULL);
free(ff.buf);
return ret;
}
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