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OpenCloudOS-Kernel/tools/perf/util/event.c

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#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <perf/cpumap.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */
#include <linux/perf_event.h>
#include <linux/zalloc.h>
#include "cpumap.h"
#include "dso.h"
#include "event.h"
#include "debug.h"
#include "hist.h"
#include "machine.h"
#include "sort.h"
#include "string2.h"
#include "strlist.h"
#include "thread.h"
#include "thread_map.h"
#include "time-utils.h"
#include <linux/ctype.h>
#include "map.h"
#include "util/namespaces.h"
#include "symbol.h"
#include "symbol/kallsyms.h"
#include "asm/bug.h"
#include "stat.h"
#include "session.h"
#include "bpf-event.h"
#include "tool.h"
#include "../perf.h"
static const char *perf_event__names[] = {
[0] = "TOTAL",
[PERF_RECORD_MMAP] = "MMAP",
[PERF_RECORD_MMAP2] = "MMAP2",
[PERF_RECORD_LOST] = "LOST",
[PERF_RECORD_COMM] = "COMM",
[PERF_RECORD_EXIT] = "EXIT",
[PERF_RECORD_THROTTLE] = "THROTTLE",
[PERF_RECORD_UNTHROTTLE] = "UNTHROTTLE",
[PERF_RECORD_FORK] = "FORK",
[PERF_RECORD_READ] = "READ",
[PERF_RECORD_SAMPLE] = "SAMPLE",
[PERF_RECORD_AUX] = "AUX",
[PERF_RECORD_ITRACE_START] = "ITRACE_START",
[PERF_RECORD_LOST_SAMPLES] = "LOST_SAMPLES",
[PERF_RECORD_SWITCH] = "SWITCH",
[PERF_RECORD_SWITCH_CPU_WIDE] = "SWITCH_CPU_WIDE",
[PERF_RECORD_NAMESPACES] = "NAMESPACES",
[PERF_RECORD_KSYMBOL] = "KSYMBOL",
[PERF_RECORD_BPF_EVENT] = "BPF_EVENT",
[PERF_RECORD_CGROUP] = "CGROUP",
[PERF_RECORD_HEADER_ATTR] = "ATTR",
[PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE",
[PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA",
[PERF_RECORD_HEADER_BUILD_ID] = "BUILD_ID",
[PERF_RECORD_FINISHED_ROUND] = "FINISHED_ROUND",
[PERF_RECORD_ID_INDEX] = "ID_INDEX",
[PERF_RECORD_AUXTRACE_INFO] = "AUXTRACE_INFO",
[PERF_RECORD_AUXTRACE] = "AUXTRACE",
[PERF_RECORD_AUXTRACE_ERROR] = "AUXTRACE_ERROR",
[PERF_RECORD_THREAD_MAP] = "THREAD_MAP",
[PERF_RECORD_CPU_MAP] = "CPU_MAP",
[PERF_RECORD_STAT_CONFIG] = "STAT_CONFIG",
[PERF_RECORD_STAT] = "STAT",
[PERF_RECORD_STAT_ROUND] = "STAT_ROUND",
[PERF_RECORD_EVENT_UPDATE] = "EVENT_UPDATE",
[PERF_RECORD_TIME_CONV] = "TIME_CONV",
[PERF_RECORD_HEADER_FEATURE] = "FEATURE",
[PERF_RECORD_COMPRESSED] = "COMPRESSED",
};
const char *perf_event__name(unsigned int id)
{
if (id >= ARRAY_SIZE(perf_event__names))
return "INVALID";
if (!perf_event__names[id])
return "UNKNOWN";
return perf_event__names[id];
}
struct process_symbol_args {
const char *name;
u64 start;
};
static int find_symbol_cb(void *arg, const char *name, char type,
u64 start)
{
struct process_symbol_args *args = arg;
/*
* Must be a function or at least an alias, as in PARISC64, where "_text" is
* an 'A' to the same address as "_stext".
*/
if (!(kallsyms__is_function(type) ||
type == 'A') || strcmp(name, args->name))
return 0;
args->start = start;
return 1;
}
int kallsyms__get_function_start(const char *kallsyms_filename,
const char *symbol_name, u64 *addr)
{
struct process_symbol_args args = { .name = symbol_name, };
if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0)
return -1;
*addr = args.start;
return 0;
}
void perf_event__read_stat_config(struct perf_stat_config *config,
struct perf_record_stat_config *event)
{
unsigned i;
for (i = 0; i < event->nr; i++) {
switch (event->data[i].tag) {
#define CASE(__term, __val) \
case PERF_STAT_CONFIG_TERM__##__term: \
config->__val = event->data[i].val; \
break;
CASE(AGGR_MODE, aggr_mode)
CASE(SCALE, scale)
CASE(INTERVAL, interval)
#undef CASE
default:
pr_warning("unknown stat config term %" PRI_lu64 "\n",
event->data[i].tag);
}
}
}
size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
{
const char *s;
if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC)
s = " exec";
else
s = "";
return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid);
}
size_t perf_event__fprintf_namespaces(union perf_event *event, FILE *fp)
{
size_t ret = 0;
struct perf_ns_link_info *ns_link_info;
u32 nr_namespaces, idx;
ns_link_info = event->namespaces.link_info;
nr_namespaces = event->namespaces.nr_namespaces;
ret += fprintf(fp, " %d/%d - nr_namespaces: %u\n\t\t[",
event->namespaces.pid,
event->namespaces.tid,
nr_namespaces);
for (idx = 0; idx < nr_namespaces; idx++) {
if (idx && (idx % 4 == 0))
ret += fprintf(fp, "\n\t\t ");
ret += fprintf(fp, "%u/%s: %" PRIu64 "/%#" PRIx64 "%s", idx,
perf_ns__name(idx), (u64)ns_link_info[idx].dev,
(u64)ns_link_info[idx].ino,
((idx + 1) != nr_namespaces) ? ", " : "]\n");
}
return ret;
}
size_t perf_event__fprintf_cgroup(union perf_event *event, FILE *fp)
{
return fprintf(fp, " cgroup: %" PRI_lu64 " %s\n",
event->cgroup.id, event->cgroup.path);
}
int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
union perf_event *event,
struct perf_sample *sample,
struct machine *machine)
{
return machine__process_comm_event(machine, event, sample);
}
int perf_event__process_namespaces(struct perf_tool *tool __maybe_unused,
union perf_event *event,
struct perf_sample *sample,
struct machine *machine)
{
return machine__process_namespaces_event(machine, event, sample);
}
int perf_event__process_cgroup(struct perf_tool *tool __maybe_unused,
union perf_event *event,
struct perf_sample *sample,
struct machine *machine)
{
return machine__process_cgroup_event(machine, event, sample);
}
int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
union perf_event *event,
struct perf_sample *sample,
struct machine *machine)
{
return machine__process_lost_event(machine, event, sample);
}
int perf_event__process_aux(struct perf_tool *tool __maybe_unused,
union perf_event *event,
struct perf_sample *sample __maybe_unused,
struct machine *machine)
{
return machine__process_aux_event(machine, event);
}
int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused,
union perf_event *event,
struct perf_sample *sample __maybe_unused,
struct machine *machine)
{
return machine__process_itrace_start_event(machine, event);
}
int perf_event__process_lost_samples(struct perf_tool *tool __maybe_unused,
union perf_event *event,
struct perf_sample *sample,
struct machine *machine)
{
return machine__process_lost_samples_event(machine, event, sample);
}
int perf_event__process_switch(struct perf_tool *tool __maybe_unused,
union perf_event *event,
struct perf_sample *sample __maybe_unused,
struct machine *machine)
{
return machine__process_switch_event(machine, event);
}
int perf_event__process_ksymbol(struct perf_tool *tool __maybe_unused,
union perf_event *event,
struct perf_sample *sample __maybe_unused,
struct machine *machine)
{
return machine__process_ksymbol(machine, event, sample);
}
int perf_event__process_bpf(struct perf_tool *tool __maybe_unused,
union perf_event *event,
struct perf_sample *sample,
struct machine *machine)
{
return machine__process_bpf(machine, event, sample);
}
size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
{
return fprintf(fp, " %d/%d: [%#" PRI_lx64 "(%#" PRI_lx64 ") @ %#" PRI_lx64 "]: %c %s\n",
event->mmap.pid, event->mmap.tid, event->mmap.start,
event->mmap.len, event->mmap.pgoff,
(event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
event->mmap.filename);
}
size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
{
return fprintf(fp, " %d/%d: [%#" PRI_lx64 "(%#" PRI_lx64 ") @ %#" PRI_lx64
" %02x:%02x %"PRI_lu64" %"PRI_lu64"]: %c%c%c%c %s\n",
event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
event->mmap2.min, event->mmap2.ino,
event->mmap2.ino_generation,
(event->mmap2.prot & PROT_READ) ? 'r' : '-',
(event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
(event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
(event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
event->mmap2.filename);
}
size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp)
{
struct perf_thread_map *threads = thread_map__new_event(&event->thread_map);
size_t ret;
ret = fprintf(fp, " nr: ");
if (threads)
ret += thread_map__fprintf(threads, fp);
else
ret += fprintf(fp, "failed to get threads from event\n");
perf_thread_map__put(threads);
return ret;
}
size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp)
{
struct perf_cpu_map *cpus = cpu_map__new_data(&event->cpu_map.data);
size_t ret;
ret = fprintf(fp, ": ");
if (cpus)
ret += cpu_map__fprintf(cpus, fp);
else
ret += fprintf(fp, "failed to get cpumap from event\n");
perf_cpu_map__put(cpus);
return ret;
}
int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
union perf_event *event,
struct perf_sample *sample,
struct machine *machine)
{
return machine__process_mmap_event(machine, event, sample);
}
int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
union perf_event *event,
struct perf_sample *sample,
struct machine *machine)
{
return machine__process_mmap2_event(machine, event, sample);
}
size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
{
return fprintf(fp, "(%d:%d):(%d:%d)\n",
event->fork.pid, event->fork.tid,
event->fork.ppid, event->fork.ptid);
}
int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
union perf_event *event,
struct perf_sample *sample,
struct machine *machine)
{
return machine__process_fork_event(machine, event, sample);
}
int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
union perf_event *event,
struct perf_sample *sample,
struct machine *machine)
{
return machine__process_exit_event(machine, event, sample);
}
size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp)
{
return fprintf(fp, " offset: %#"PRI_lx64" size: %#"PRI_lx64" flags: %#"PRI_lx64" [%s%s%s]\n",
event->aux.aux_offset, event->aux.aux_size,
event->aux.flags,
event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "",
event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "",
event->aux.flags & PERF_AUX_FLAG_PARTIAL ? "P" : "");
}
size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp)
{
return fprintf(fp, " pid: %u tid: %u\n",
event->itrace_start.pid, event->itrace_start.tid);
}
size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp)
{
bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
const char *in_out = !out ? "IN " :
!(event->header.misc & PERF_RECORD_MISC_SWITCH_OUT_PREEMPT) ?
"OUT " : "OUT preempt";
if (event->header.type == PERF_RECORD_SWITCH)
return fprintf(fp, " %s\n", in_out);
return fprintf(fp, " %s %s pid/tid: %5u/%-5u\n",
in_out, out ? "next" : "prev",
event->context_switch.next_prev_pid,
event->context_switch.next_prev_tid);
}
static size_t perf_event__fprintf_lost(union perf_event *event, FILE *fp)
{
return fprintf(fp, " lost %" PRI_lu64 "\n", event->lost.lost);
}
size_t perf_event__fprintf_ksymbol(union perf_event *event, FILE *fp)
{
return fprintf(fp, " addr %" PRI_lx64 " len %u type %u flags 0x%x name %s\n",
event->ksymbol.addr, event->ksymbol.len,
event->ksymbol.ksym_type,
event->ksymbol.flags, event->ksymbol.name);
}
size_t perf_event__fprintf_bpf(union perf_event *event, FILE *fp)
{
return fprintf(fp, " type %u, flags %u, id %u\n",
event->bpf.type, event->bpf.flags, event->bpf.id);
}
size_t perf_event__fprintf(union perf_event *event, FILE *fp)
{
size_t ret = fprintf(fp, "PERF_RECORD_%s",
perf_event__name(event->header.type));
switch (event->header.type) {
case PERF_RECORD_COMM:
ret += perf_event__fprintf_comm(event, fp);
break;
case PERF_RECORD_FORK:
case PERF_RECORD_EXIT:
ret += perf_event__fprintf_task(event, fp);
break;
case PERF_RECORD_MMAP:
ret += perf_event__fprintf_mmap(event, fp);
break;
case PERF_RECORD_NAMESPACES:
ret += perf_event__fprintf_namespaces(event, fp);
break;
case PERF_RECORD_CGROUP:
ret += perf_event__fprintf_cgroup(event, fp);
break;
case PERF_RECORD_MMAP2:
ret += perf_event__fprintf_mmap2(event, fp);
break;
case PERF_RECORD_AUX:
ret += perf_event__fprintf_aux(event, fp);
break;
case PERF_RECORD_ITRACE_START:
ret += perf_event__fprintf_itrace_start(event, fp);
break;
case PERF_RECORD_SWITCH:
case PERF_RECORD_SWITCH_CPU_WIDE:
ret += perf_event__fprintf_switch(event, fp);
break;
case PERF_RECORD_LOST:
ret += perf_event__fprintf_lost(event, fp);
break;
case PERF_RECORD_KSYMBOL:
ret += perf_event__fprintf_ksymbol(event, fp);
break;
case PERF_RECORD_BPF_EVENT:
ret += perf_event__fprintf_bpf(event, fp);
break;
default:
ret += fprintf(fp, "\n");
}
return ret;
}
int perf_event__process(struct perf_tool *tool __maybe_unused,
union perf_event *event,
struct perf_sample *sample,
struct machine *machine)
{
return machine__process_event(machine, event, sample);
}
struct map *thread__find_map(struct thread *thread, u8 cpumode, u64 addr,
struct addr_location *al)
{
struct maps *maps = thread->maps;
struct machine *machine = maps->machine;
bool load_map = false;
al->maps = maps;
al->thread = thread;
al->addr = addr;
al->cpumode = cpumode;
al->filtered = 0;
if (machine == NULL) {
al->map = NULL;
return NULL;
}
if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
al->level = 'k';
al->maps = maps = &machine->kmaps;
load_map = true;
} else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
al->level = '.';
} else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
al->level = 'g';
al->maps = maps = &machine->kmaps;
load_map = true;
} else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
al->level = 'u';
} else {
al->level = 'H';
al->map = NULL;
if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
!perf_guest)
al->filtered |= (1 << HIST_FILTER__GUEST);
if ((cpumode == PERF_RECORD_MISC_USER ||
cpumode == PERF_RECORD_MISC_KERNEL) &&
!perf_host)
al->filtered |= (1 << HIST_FILTER__HOST);
return NULL;
}
al->map = maps__find(maps, al->addr);
if (al->map != NULL) {
/*
* Kernel maps might be changed when loading symbols so loading
* must be done prior to using kernel maps.
*/
if (load_map)
map__load(al->map);
al->addr = al->map->map_ip(al->map, al->addr);
}
return al->map;
}
/*
* For branch stacks or branch samples, the sample cpumode might not be correct
* because it applies only to the sample 'ip' and not necessary to 'addr' or
* branch stack addresses. If possible, use a fallback to deal with those cases.
*/
struct map *thread__find_map_fb(struct thread *thread, u8 cpumode, u64 addr,
struct addr_location *al)
{
struct map *map = thread__find_map(thread, cpumode, addr, al);
struct machine *machine = thread->maps->machine;
u8 addr_cpumode = machine__addr_cpumode(machine, cpumode, addr);
if (map || addr_cpumode == cpumode)
return map;
return thread__find_map(thread, addr_cpumode, addr, al);
}
struct symbol *thread__find_symbol(struct thread *thread, u8 cpumode,
u64 addr, struct addr_location *al)
{
al->sym = NULL;
if (thread__find_map(thread, cpumode, addr, al))
al->sym = map__find_symbol(al->map, al->addr);
return al->sym;
}
struct symbol *thread__find_symbol_fb(struct thread *thread, u8 cpumode,
u64 addr, struct addr_location *al)
{
al->sym = NULL;
if (thread__find_map_fb(thread, cpumode, addr, al))
al->sym = map__find_symbol(al->map, al->addr);
return al->sym;
}
/*
* Callers need to drop the reference to al->thread, obtained in
* machine__findnew_thread()
*/
int machine__resolve(struct machine *machine, struct addr_location *al,
struct perf_sample *sample)
{
struct thread *thread = machine__findnew_thread(machine, sample->pid,
sample->tid);
if (thread == NULL)
return -1;
dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
thread__find_map(thread, sample->cpumode, sample->ip, al);
dump_printf(" ...... dso: %s\n",
al->map ? al->map->dso->long_name :
al->level == 'H' ? "[hypervisor]" : "<not found>");
if (thread__is_filtered(thread))
al->filtered |= (1 << HIST_FILTER__THREAD);
al->sym = NULL;
al->cpu = sample->cpu;
al->socket = -1;
al->srcline = NULL;
if (al->cpu >= 0) {
struct perf_env *env = machine->env;
if (env && env->cpu)
al->socket = env->cpu[al->cpu].socket_id;
}
if (al->map) {
struct dso *dso = al->map->dso;
if (symbol_conf.dso_list &&
(!dso || !(strlist__has_entry(symbol_conf.dso_list,
dso->short_name) ||
(dso->short_name != dso->long_name &&
strlist__has_entry(symbol_conf.dso_list,
dso->long_name))))) {
al->filtered |= (1 << HIST_FILTER__DSO);
}
al->sym = map__find_symbol(al->map, al->addr);
}
if (symbol_conf.sym_list) {
int ret = 0;
char al_addr_str[32];
size_t sz = sizeof(al_addr_str);
if (al->sym) {
ret = strlist__has_entry(symbol_conf.sym_list,
al->sym->name);
}
if (!(ret && al->sym)) {
snprintf(al_addr_str, sz, "0x%"PRIx64,
al->map->unmap_ip(al->map, al->sym->start));
ret = strlist__has_entry(symbol_conf.sym_list,
al_addr_str);
}
if (!ret)
al->filtered |= (1 << HIST_FILTER__SYMBOL);
}
return 0;
}
/*
* The preprocess_sample method will return with reference counts for the
* in it, when done using (and perhaps getting ref counts if needing to
* keep a pointer to one of those entries) it must be paired with
* addr_location__put(), so that the refcounts can be decremented.
*/
void addr_location__put(struct addr_location *al)
{
thread__zput(al->thread);
}
bool is_bts_event(struct perf_event_attr *attr)
{
return attr->type == PERF_TYPE_HARDWARE &&
(attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
attr->sample_period == 1;
}
bool sample_addr_correlates_sym(struct perf_event_attr *attr)
{
if (attr->type == PERF_TYPE_SOFTWARE &&
(attr->config == PERF_COUNT_SW_PAGE_FAULTS ||
attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ))
return true;
if (is_bts_event(attr))
return true;
return false;
}
void thread__resolve(struct thread *thread, struct addr_location *al,
struct perf_sample *sample)
{
thread__find_map_fb(thread, sample->cpumode, sample->addr, al);
al->cpu = sample->cpu;
al->sym = NULL;
if (al->map)
al->sym = map__find_symbol(al->map, al->addr);
}
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