1683 lines
42 KiB
C
1683 lines
42 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <dirent.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <inttypes.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */
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#include <api/fs/fs.h>
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#include <linux/perf_event.h>
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#include "event.h"
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#include "debug.h"
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#include "hist.h"
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#include "machine.h"
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#include "sort.h"
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#include "string2.h"
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#include "strlist.h"
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#include "thread.h"
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#include "thread_map.h"
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#include "sane_ctype.h"
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#include "symbol/kallsyms.h"
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#include "asm/bug.h"
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#include "stat.h"
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static const char *perf_event__names[] = {
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[0] = "TOTAL",
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[PERF_RECORD_MMAP] = "MMAP",
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[PERF_RECORD_MMAP2] = "MMAP2",
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[PERF_RECORD_LOST] = "LOST",
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[PERF_RECORD_COMM] = "COMM",
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[PERF_RECORD_EXIT] = "EXIT",
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[PERF_RECORD_THROTTLE] = "THROTTLE",
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[PERF_RECORD_UNTHROTTLE] = "UNTHROTTLE",
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[PERF_RECORD_FORK] = "FORK",
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[PERF_RECORD_READ] = "READ",
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[PERF_RECORD_SAMPLE] = "SAMPLE",
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[PERF_RECORD_AUX] = "AUX",
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[PERF_RECORD_ITRACE_START] = "ITRACE_START",
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[PERF_RECORD_LOST_SAMPLES] = "LOST_SAMPLES",
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[PERF_RECORD_SWITCH] = "SWITCH",
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[PERF_RECORD_SWITCH_CPU_WIDE] = "SWITCH_CPU_WIDE",
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[PERF_RECORD_NAMESPACES] = "NAMESPACES",
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[PERF_RECORD_HEADER_ATTR] = "ATTR",
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[PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE",
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[PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA",
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[PERF_RECORD_HEADER_BUILD_ID] = "BUILD_ID",
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[PERF_RECORD_FINISHED_ROUND] = "FINISHED_ROUND",
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[PERF_RECORD_ID_INDEX] = "ID_INDEX",
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[PERF_RECORD_AUXTRACE_INFO] = "AUXTRACE_INFO",
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[PERF_RECORD_AUXTRACE] = "AUXTRACE",
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[PERF_RECORD_AUXTRACE_ERROR] = "AUXTRACE_ERROR",
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[PERF_RECORD_THREAD_MAP] = "THREAD_MAP",
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[PERF_RECORD_CPU_MAP] = "CPU_MAP",
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[PERF_RECORD_STAT_CONFIG] = "STAT_CONFIG",
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[PERF_RECORD_STAT] = "STAT",
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[PERF_RECORD_STAT_ROUND] = "STAT_ROUND",
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[PERF_RECORD_EVENT_UPDATE] = "EVENT_UPDATE",
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[PERF_RECORD_TIME_CONV] = "TIME_CONV",
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[PERF_RECORD_HEADER_FEATURE] = "FEATURE",
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};
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static const char *perf_ns__names[] = {
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[NET_NS_INDEX] = "net",
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[UTS_NS_INDEX] = "uts",
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[IPC_NS_INDEX] = "ipc",
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[PID_NS_INDEX] = "pid",
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[USER_NS_INDEX] = "user",
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[MNT_NS_INDEX] = "mnt",
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[CGROUP_NS_INDEX] = "cgroup",
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};
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const char *perf_event__name(unsigned int id)
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{
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if (id >= ARRAY_SIZE(perf_event__names))
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return "INVALID";
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if (!perf_event__names[id])
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return "UNKNOWN";
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return perf_event__names[id];
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}
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static const char *perf_ns__name(unsigned int id)
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{
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if (id >= ARRAY_SIZE(perf_ns__names))
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return "UNKNOWN";
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return perf_ns__names[id];
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}
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static int perf_tool__process_synth_event(struct perf_tool *tool,
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union perf_event *event,
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struct machine *machine,
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perf_event__handler_t process)
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{
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struct perf_sample synth_sample = {
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.pid = -1,
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.tid = -1,
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.time = -1,
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.stream_id = -1,
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.cpu = -1,
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.period = 1,
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.cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK,
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};
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return process(tool, event, &synth_sample, machine);
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};
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/*
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* Assumes that the first 4095 bytes of /proc/pid/stat contains
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* the comm, tgid and ppid.
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*/
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static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len,
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pid_t *tgid, pid_t *ppid)
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{
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char filename[PATH_MAX];
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char bf[4096];
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int fd;
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size_t size = 0;
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ssize_t n;
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char *name, *tgids, *ppids;
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*tgid = -1;
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*ppid = -1;
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snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
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fd = open(filename, O_RDONLY);
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if (fd < 0) {
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pr_debug("couldn't open %s\n", filename);
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return -1;
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}
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n = read(fd, bf, sizeof(bf) - 1);
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close(fd);
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if (n <= 0) {
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pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n",
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pid);
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return -1;
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}
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bf[n] = '\0';
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name = strstr(bf, "Name:");
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tgids = strstr(bf, "Tgid:");
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ppids = strstr(bf, "PPid:");
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if (name) {
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char *nl;
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name += 5; /* strlen("Name:") */
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name = ltrim(name);
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nl = strchr(name, '\n');
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if (nl)
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*nl = '\0';
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size = strlen(name);
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if (size >= len)
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size = len - 1;
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memcpy(comm, name, size);
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comm[size] = '\0';
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} else {
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pr_debug("Name: string not found for pid %d\n", pid);
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}
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if (tgids) {
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tgids += 5; /* strlen("Tgid:") */
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*tgid = atoi(tgids);
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} else {
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pr_debug("Tgid: string not found for pid %d\n", pid);
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}
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if (ppids) {
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ppids += 5; /* strlen("PPid:") */
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*ppid = atoi(ppids);
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} else {
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pr_debug("PPid: string not found for pid %d\n", pid);
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}
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return 0;
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}
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static int perf_event__prepare_comm(union perf_event *event, pid_t pid,
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struct machine *machine,
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pid_t *tgid, pid_t *ppid)
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{
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size_t size;
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*ppid = -1;
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memset(&event->comm, 0, sizeof(event->comm));
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if (machine__is_host(machine)) {
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if (perf_event__get_comm_ids(pid, event->comm.comm,
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sizeof(event->comm.comm),
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tgid, ppid) != 0) {
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return -1;
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}
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} else {
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*tgid = machine->pid;
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}
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if (*tgid < 0)
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return -1;
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event->comm.pid = *tgid;
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event->comm.header.type = PERF_RECORD_COMM;
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size = strlen(event->comm.comm) + 1;
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size = PERF_ALIGN(size, sizeof(u64));
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memset(event->comm.comm + size, 0, machine->id_hdr_size);
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event->comm.header.size = (sizeof(event->comm) -
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(sizeof(event->comm.comm) - size) +
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machine->id_hdr_size);
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event->comm.tid = pid;
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return 0;
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}
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pid_t perf_event__synthesize_comm(struct perf_tool *tool,
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union perf_event *event, pid_t pid,
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perf_event__handler_t process,
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struct machine *machine)
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{
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pid_t tgid, ppid;
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if (perf_event__prepare_comm(event, pid, machine, &tgid, &ppid) != 0)
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return -1;
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if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
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return -1;
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return tgid;
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}
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static void perf_event__get_ns_link_info(pid_t pid, const char *ns,
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struct perf_ns_link_info *ns_link_info)
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{
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struct stat64 st;
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char proc_ns[128];
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sprintf(proc_ns, "/proc/%u/ns/%s", pid, ns);
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if (stat64(proc_ns, &st) == 0) {
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ns_link_info->dev = st.st_dev;
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ns_link_info->ino = st.st_ino;
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}
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}
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int perf_event__synthesize_namespaces(struct perf_tool *tool,
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union perf_event *event,
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pid_t pid, pid_t tgid,
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perf_event__handler_t process,
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struct machine *machine)
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{
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u32 idx;
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struct perf_ns_link_info *ns_link_info;
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if (!tool || !tool->namespace_events)
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return 0;
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memset(&event->namespaces, 0, (sizeof(event->namespaces) +
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(NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
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machine->id_hdr_size));
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event->namespaces.pid = tgid;
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event->namespaces.tid = pid;
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event->namespaces.nr_namespaces = NR_NAMESPACES;
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ns_link_info = event->namespaces.link_info;
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for (idx = 0; idx < event->namespaces.nr_namespaces; idx++)
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perf_event__get_ns_link_info(pid, perf_ns__name(idx),
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&ns_link_info[idx]);
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event->namespaces.header.type = PERF_RECORD_NAMESPACES;
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event->namespaces.header.size = (sizeof(event->namespaces) +
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(NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
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machine->id_hdr_size);
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if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
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return -1;
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return 0;
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}
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static int perf_event__synthesize_fork(struct perf_tool *tool,
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union perf_event *event,
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pid_t pid, pid_t tgid, pid_t ppid,
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perf_event__handler_t process,
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struct machine *machine)
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{
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memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
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/*
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* for main thread set parent to ppid from status file. For other
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* threads set parent pid to main thread. ie., assume main thread
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* spawns all threads in a process
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*/
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if (tgid == pid) {
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event->fork.ppid = ppid;
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event->fork.ptid = ppid;
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} else {
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event->fork.ppid = tgid;
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event->fork.ptid = tgid;
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}
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event->fork.pid = tgid;
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event->fork.tid = pid;
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event->fork.header.type = PERF_RECORD_FORK;
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event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
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if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
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return -1;
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return 0;
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}
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int perf_event__synthesize_mmap_events(struct perf_tool *tool,
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union perf_event *event,
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pid_t pid, pid_t tgid,
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perf_event__handler_t process,
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struct machine *machine,
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bool mmap_data,
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unsigned int proc_map_timeout)
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{
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char filename[PATH_MAX];
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FILE *fp;
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unsigned long long t;
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bool truncation = false;
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unsigned long long timeout = proc_map_timeout * 1000000ULL;
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int rc = 0;
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const char *hugetlbfs_mnt = hugetlbfs__mountpoint();
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int hugetlbfs_mnt_len = hugetlbfs_mnt ? strlen(hugetlbfs_mnt) : 0;
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if (machine__is_default_guest(machine))
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return 0;
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snprintf(filename, sizeof(filename), "%s/proc/%d/task/%d/maps",
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machine->root_dir, pid, pid);
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fp = fopen(filename, "r");
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if (fp == NULL) {
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/*
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* We raced with a task exiting - just return:
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*/
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pr_debug("couldn't open %s\n", filename);
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return -1;
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}
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event->header.type = PERF_RECORD_MMAP2;
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t = rdclock();
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while (1) {
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char bf[BUFSIZ];
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char prot[5];
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char execname[PATH_MAX];
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char anonstr[] = "//anon";
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unsigned int ino;
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size_t size;
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ssize_t n;
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if (fgets(bf, sizeof(bf), fp) == NULL)
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break;
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if ((rdclock() - t) > timeout) {
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pr_warning("Reading %s time out. "
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"You may want to increase "
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"the time limit by --proc-map-timeout\n",
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filename);
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truncation = true;
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goto out;
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}
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/* ensure null termination since stack will be reused. */
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strcpy(execname, "");
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/* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */
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n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %x:%x %u %[^\n]\n",
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&event->mmap2.start, &event->mmap2.len, prot,
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&event->mmap2.pgoff, &event->mmap2.maj,
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&event->mmap2.min,
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&ino, execname);
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/*
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* Anon maps don't have the execname.
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*/
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if (n < 7)
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continue;
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event->mmap2.ino = (u64)ino;
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/*
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* Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
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*/
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if (machine__is_host(machine))
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event->header.misc = PERF_RECORD_MISC_USER;
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else
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event->header.misc = PERF_RECORD_MISC_GUEST_USER;
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/* map protection and flags bits */
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event->mmap2.prot = 0;
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event->mmap2.flags = 0;
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if (prot[0] == 'r')
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event->mmap2.prot |= PROT_READ;
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if (prot[1] == 'w')
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event->mmap2.prot |= PROT_WRITE;
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if (prot[2] == 'x')
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event->mmap2.prot |= PROT_EXEC;
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if (prot[3] == 's')
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event->mmap2.flags |= MAP_SHARED;
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else
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event->mmap2.flags |= MAP_PRIVATE;
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if (prot[2] != 'x') {
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if (!mmap_data || prot[0] != 'r')
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continue;
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event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
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}
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out:
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if (truncation)
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event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT;
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if (!strcmp(execname, ""))
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strcpy(execname, anonstr);
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if (hugetlbfs_mnt_len &&
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!strncmp(execname, hugetlbfs_mnt, hugetlbfs_mnt_len)) {
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strcpy(execname, anonstr);
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event->mmap2.flags |= MAP_HUGETLB;
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}
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size = strlen(execname) + 1;
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memcpy(event->mmap2.filename, execname, size);
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size = PERF_ALIGN(size, sizeof(u64));
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event->mmap2.len -= event->mmap.start;
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event->mmap2.header.size = (sizeof(event->mmap2) -
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(sizeof(event->mmap2.filename) - size));
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memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
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event->mmap2.header.size += machine->id_hdr_size;
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event->mmap2.pid = tgid;
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event->mmap2.tid = pid;
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if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
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rc = -1;
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break;
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}
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if (truncation)
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break;
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}
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fclose(fp);
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return rc;
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}
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|
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int perf_event__synthesize_modules(struct perf_tool *tool,
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perf_event__handler_t process,
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struct machine *machine)
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{
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int rc = 0;
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struct map *pos;
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struct map_groups *kmaps = &machine->kmaps;
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struct maps *maps = &kmaps->maps[MAP__FUNCTION];
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union perf_event *event = zalloc((sizeof(event->mmap) +
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machine->id_hdr_size));
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if (event == NULL) {
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pr_debug("Not enough memory synthesizing mmap event "
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"for kernel modules\n");
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return -1;
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}
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event->header.type = PERF_RECORD_MMAP;
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|
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/*
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* kernel uses 0 for user space maps, see kernel/perf_event.c
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* __perf_event_mmap
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*/
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if (machine__is_host(machine))
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event->header.misc = PERF_RECORD_MISC_KERNEL;
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else
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event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
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for (pos = maps__first(maps); pos; pos = map__next(pos)) {
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size_t size;
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if (__map__is_kernel(pos))
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continue;
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size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
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event->mmap.header.type = PERF_RECORD_MMAP;
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event->mmap.header.size = (sizeof(event->mmap) -
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(sizeof(event->mmap.filename) - size));
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memset(event->mmap.filename + size, 0, machine->id_hdr_size);
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event->mmap.header.size += machine->id_hdr_size;
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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,
|
|
unsigned int proc_map_timeout)
|
|
{
|
|
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;
|
|
|
|
|
|
return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
|
|
process, machine, mmap_data,
|
|
proc_map_timeout);
|
|
}
|
|
|
|
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, proc_map_timeout);
|
|
if (rc)
|
|
break;
|
|
}
|
|
}
|
|
|
|
closedir(tasks);
|
|
return rc;
|
|
}
|
|
|
|
int perf_event__synthesize_thread_map(struct perf_tool *tool,
|
|
struct thread_map *threads,
|
|
perf_event__handler_t process,
|
|
struct machine *machine,
|
|
bool mmap_data,
|
|
unsigned int proc_map_timeout)
|
|
{
|
|
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,
|
|
thread_map__pid(threads, thread), 0,
|
|
process, tool, machine,
|
|
mmap_data, proc_map_timeout)) {
|
|
err = -1;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* comm.pid is set to thread group id by
|
|
* perf_event__synthesize_comm
|
|
*/
|
|
if ((int) comm_event->comm.pid != 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 == 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, proc_map_timeout)) {
|
|
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,
|
|
unsigned int proc_map_timeout,
|
|
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,
|
|
proc_map_timeout);
|
|
}
|
|
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;
|
|
unsigned int proc_map_timeout;
|
|
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->proc_map_timeout, 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 proc_map_timeout,
|
|
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,
|
|
proc_map_timeout,
|
|
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].proc_map_timeout = proc_map_timeout;
|
|
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++)
|
|
free(dirent[i]);
|
|
free(dirent);
|
|
|
|
return err;
|
|
}
|
|
|
|
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 (!(symbol_type__is_a(type, MAP__FUNCTION) ||
|
|
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;
|
|
}
|
|
|
|
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 (symbol_conf.kptr_restrict)
|
|
return -1;
|
|
if (map == NULL)
|
|
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;
|
|
}
|
|
|
|
kmap = map__kmap(map);
|
|
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_thread_map2(struct perf_tool *tool,
|
|
struct 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 thread_map_event_entry *entry = &event->thread_map.entries[i];
|
|
char *comm = thread_map__comm(threads, i);
|
|
|
|
if (!comm)
|
|
comm = (char *) "";
|
|
|
|
entry->pid = 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 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 cpu_map_mask *mask,
|
|
struct 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 cpu_map *map)
|
|
{
|
|
return sizeof(struct cpu_map_entries) + map->nr * sizeof(u16);
|
|
}
|
|
|
|
static size_t mask_size(struct 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 cpu_map_mask) + BITS_TO_LONGS(*max) * sizeof(long);
|
|
}
|
|
|
|
void *cpu_map_data__alloc(struct cpu_map *map, size_t *size, u16 *type, int *max)
|
|
{
|
|
size_t size_cpus, size_mask;
|
|
bool is_dummy = 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 cpu_map_data' is:
|
|
*
|
|
* array = size of 'struct cpu_map_entries' +
|
|
* number of cpus * sizeof(u64)
|
|
*
|
|
* mask = size of 'struct cpu_map_mask' +
|
|
* maximum cpu bit converted to size of longs
|
|
*
|
|
* and finaly + the size of 'struct 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 cpu_map_data);
|
|
return zalloc(*size);
|
|
}
|
|
|
|
void cpu_map_data__synthesize(struct cpu_map_data *data, struct 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 cpu_map_mask *) data->data, map, max);
|
|
default:
|
|
break;
|
|
};
|
|
}
|
|
|
|
static struct cpu_map_event* cpu_map_event__new(struct cpu_map *map)
|
|
{
|
|
size_t size = sizeof(struct cpu_map_event);
|
|
struct cpu_map_event *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 cpu_map *map,
|
|
perf_event__handler_t process,
|
|
struct machine *machine)
|
|
{
|
|
struct cpu_map_event *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 stat_config_event *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 stat_event 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 stat_round_event 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);
|
|
}
|
|
|
|
void perf_event__read_stat_config(struct perf_stat_config *config,
|
|
struct stat_config_event *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 %" PRIu64 "\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;
|
|
}
|
|
|
|
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_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);
|
|
}
|
|
|
|
size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
|
|
{
|
|
return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %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: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64
|
|
" %02x:%02x %"PRIu64" %"PRIu64"]: %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 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");
|
|
|
|
thread_map__put(threads);
|
|
return ret;
|
|
}
|
|
|
|
size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp)
|
|
{
|
|
struct 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");
|
|
|
|
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: %#"PRIx64" size: %#"PRIx64" flags: %#"PRIx64" [%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 %" PRIu64 "\n", event->lost.lost);
|
|
}
|
|
|
|
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_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;
|
|
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);
|
|
}
|
|
|
|
void thread__find_addr_map(struct thread *thread, u8 cpumode,
|
|
enum map_type type, u64 addr,
|
|
struct addr_location *al)
|
|
{
|
|
struct map_groups *mg = thread->mg;
|
|
struct machine *machine = mg->machine;
|
|
bool load_map = false;
|
|
|
|
al->machine = machine;
|
|
al->thread = thread;
|
|
al->addr = addr;
|
|
al->cpumode = cpumode;
|
|
al->filtered = 0;
|
|
|
|
if (machine == NULL) {
|
|
al->map = NULL;
|
|
return;
|
|
}
|
|
|
|
if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
|
|
al->level = 'k';
|
|
mg = &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';
|
|
mg = &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;
|
|
}
|
|
try_again:
|
|
al->map = map_groups__find(mg, type, al->addr);
|
|
if (al->map == NULL) {
|
|
/*
|
|
* If this is outside of all known maps, and is a negative
|
|
* address, try to look it up in the kernel dso, as it might be
|
|
* a vsyscall or vdso (which executes in user-mode).
|
|
*
|
|
* XXX This is nasty, we should have a symbol list in the
|
|
* "[vdso]" dso, but for now lets use the old trick of looking
|
|
* in the whole kernel symbol list.
|
|
*/
|
|
if (cpumode == PERF_RECORD_MISC_USER && machine &&
|
|
mg != &machine->kmaps &&
|
|
machine__kernel_ip(machine, al->addr)) {
|
|
mg = &machine->kmaps;
|
|
load_map = true;
|
|
goto try_again;
|
|
}
|
|
} else {
|
|
/*
|
|
* 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);
|
|
}
|
|
}
|
|
|
|
void thread__find_addr_location(struct thread *thread,
|
|
u8 cpumode, enum map_type type, u64 addr,
|
|
struct addr_location *al)
|
|
{
|
|
thread__find_addr_map(thread, cpumode, type, addr, al);
|
|
if (al->map != NULL)
|
|
al->sym = map__find_symbol(al->map, al->addr);
|
|
else
|
|
al->sym = NULL;
|
|
}
|
|
|
|
/*
|
|
* 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_addr_map(thread, sample->cpumode, MAP__FUNCTION, 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 &&
|
|
(!al->sym || !strlist__has_entry(symbol_conf.sym_list,
|
|
al->sym->name))) {
|
|
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_addr_map(thread, sample->cpumode, MAP__FUNCTION, sample->addr, al);
|
|
if (!al->map)
|
|
thread__find_addr_map(thread, sample->cpumode, MAP__VARIABLE,
|
|
sample->addr, al);
|
|
|
|
al->cpu = sample->cpu;
|
|
al->sym = NULL;
|
|
|
|
if (al->map)
|
|
al->sym = map__find_symbol(al->map, al->addr);
|
|
}
|