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![Konstantin Khlebnikov](/assets/img/avatar_default.png)
Threads share map_groups, all map events are merged into it. Thus we could send mmaps only for thread group leader. Otherwise it took ages to attach and record something from processes with many vmas and threads. Thread group leader could be already dead, but it seems perf cannot handle this case anyway. Testing dummy: #include <stdio.h> #include <stdlib.h> #include <sys/mman.h> #include <pthread.h> #include <unistd.h> void *thread(void *arg) { pause(); } int main(int argc, char **argv) { int threads = 10000; int vmas = 50000; pthread_t th; for (int i = 0; i < threads; i++) pthread_create(&th, NULL, thread, NULL); for (int i = 0; i < vmas; i++) mmap(NULL, 4096, (i & 1) ? PROT_READ : PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE, -1, 0); sleep(60); return 0; } Comment by Jiri Olsa: We actualy synthesize the group leader (if we found one) for the thread even if it's not present in the thread_map, so the process maps are always in data. Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/153363294102.396323.6277944760215058174.stgit@buzz Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
1704 lines
43 KiB
C
1704 lines
43 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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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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|
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if (truncation)
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break;
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}
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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 maps *maps = machine__kernel_maps(machine);
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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) {
|
|
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;
|
|
|
|
for (pos = maps__first(maps); pos; pos = map__next(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,
|
|
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;
|
|
|
|
/*
|
|
* send mmap only for thread group leader
|
|
* see thread__init_map_groups
|
|
*/
|
|
if (pid == tgid &&
|
|
perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
|
|
process, machine, mmap_data,
|
|
proc_map_timeout))
|
|
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, 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 (!(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;
|
|
}
|
|
|
|
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 (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_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 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);
|
|
}
|
|
|
|
struct map *thread__find_map(struct thread *thread, u8 cpumode, 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 NULL;
|
|
}
|
|
|
|
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 NULL;
|
|
}
|
|
try_again:
|
|
al->map = map_groups__find(mg, 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);
|
|
}
|
|
|
|
return al->map;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* 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 &&
|
|
(!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_map(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);
|
|
}
|