654 lines
18 KiB
C
654 lines
18 KiB
C
#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 <perf/cpumap.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 <linux/perf_event.h>
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#include <linux/zalloc.h>
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#include "cpumap.h"
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#include "dso.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 "time-utils.h"
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#include <linux/ctype.h>
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#include "map.h"
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#include "util/namespaces.h"
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#include "symbol.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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#include "session.h"
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#include "bpf-event.h"
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#include "tool.h"
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#include "../perf.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_KSYMBOL] = "KSYMBOL",
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[PERF_RECORD_BPF_EVENT] = "BPF_EVENT",
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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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[PERF_RECORD_COMPRESSED] = "COMPRESSED",
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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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struct process_symbol_args {
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const char *name;
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u64 start;
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};
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static int find_symbol_cb(void *arg, const char *name, char type,
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u64 start)
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{
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struct process_symbol_args *args = arg;
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/*
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* Must be a function or at least an alias, as in PARISC64, where "_text" is
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* an 'A' to the same address as "_stext".
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*/
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if (!(kallsyms__is_function(type) ||
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type == 'A') || strcmp(name, args->name))
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return 0;
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args->start = start;
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return 1;
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}
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int kallsyms__get_function_start(const char *kallsyms_filename,
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const char *symbol_name, u64 *addr)
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{
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struct process_symbol_args args = { .name = symbol_name, };
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if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0)
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return -1;
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*addr = args.start;
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return 0;
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}
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void perf_event__read_stat_config(struct perf_stat_config *config,
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struct perf_record_stat_config *event)
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{
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unsigned i;
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for (i = 0; i < event->nr; i++) {
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switch (event->data[i].tag) {
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#define CASE(__term, __val) \
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case PERF_STAT_CONFIG_TERM__##__term: \
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config->__val = event->data[i].val; \
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break;
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CASE(AGGR_MODE, aggr_mode)
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CASE(SCALE, scale)
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CASE(INTERVAL, interval)
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#undef CASE
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default:
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pr_warning("unknown stat config term %" PRI_lu64 "\n",
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event->data[i].tag);
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}
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}
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}
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size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
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{
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const char *s;
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if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC)
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s = " exec";
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else
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s = "";
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return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid);
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}
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size_t perf_event__fprintf_namespaces(union perf_event *event, FILE *fp)
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{
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size_t ret = 0;
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struct perf_ns_link_info *ns_link_info;
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u32 nr_namespaces, idx;
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ns_link_info = event->namespaces.link_info;
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nr_namespaces = event->namespaces.nr_namespaces;
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ret += fprintf(fp, " %d/%d - nr_namespaces: %u\n\t\t[",
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event->namespaces.pid,
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event->namespaces.tid,
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nr_namespaces);
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for (idx = 0; idx < nr_namespaces; idx++) {
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if (idx && (idx % 4 == 0))
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ret += fprintf(fp, "\n\t\t ");
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ret += fprintf(fp, "%u/%s: %" PRIu64 "/%#" PRIx64 "%s", idx,
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perf_ns__name(idx), (u64)ns_link_info[idx].dev,
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(u64)ns_link_info[idx].ino,
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((idx + 1) != nr_namespaces) ? ", " : "]\n");
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}
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return ret;
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}
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int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
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union perf_event *event,
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struct perf_sample *sample,
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struct machine *machine)
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{
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return machine__process_comm_event(machine, event, sample);
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}
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int perf_event__process_namespaces(struct perf_tool *tool __maybe_unused,
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union perf_event *event,
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struct perf_sample *sample,
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struct machine *machine)
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{
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return machine__process_namespaces_event(machine, event, sample);
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}
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int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
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union perf_event *event,
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struct perf_sample *sample,
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struct machine *machine)
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{
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return machine__process_lost_event(machine, event, sample);
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}
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int perf_event__process_aux(struct perf_tool *tool __maybe_unused,
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union perf_event *event,
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struct perf_sample *sample __maybe_unused,
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struct machine *machine)
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{
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return machine__process_aux_event(machine, event);
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}
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int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused,
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union perf_event *event,
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struct perf_sample *sample __maybe_unused,
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struct machine *machine)
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{
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return machine__process_itrace_start_event(machine, event);
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}
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int perf_event__process_lost_samples(struct perf_tool *tool __maybe_unused,
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union perf_event *event,
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struct perf_sample *sample,
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struct machine *machine)
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{
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return machine__process_lost_samples_event(machine, event, sample);
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}
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int perf_event__process_switch(struct perf_tool *tool __maybe_unused,
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union perf_event *event,
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struct perf_sample *sample __maybe_unused,
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struct machine *machine)
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{
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return machine__process_switch_event(machine, event);
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}
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int perf_event__process_ksymbol(struct perf_tool *tool __maybe_unused,
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union perf_event *event,
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struct perf_sample *sample __maybe_unused,
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struct machine *machine)
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{
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return machine__process_ksymbol(machine, event, sample);
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}
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int perf_event__process_bpf(struct perf_tool *tool __maybe_unused,
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union perf_event *event,
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struct perf_sample *sample,
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struct machine *machine)
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{
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return machine__process_bpf(machine, event, sample);
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}
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size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
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{
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return fprintf(fp, " %d/%d: [%#" PRI_lx64 "(%#" PRI_lx64 ") @ %#" PRI_lx64 "]: %c %s\n",
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event->mmap.pid, event->mmap.tid, event->mmap.start,
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event->mmap.len, event->mmap.pgoff,
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(event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
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event->mmap.filename);
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}
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size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
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{
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return fprintf(fp, " %d/%d: [%#" PRI_lx64 "(%#" PRI_lx64 ") @ %#" PRI_lx64
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" %02x:%02x %"PRI_lu64" %"PRI_lu64"]: %c%c%c%c %s\n",
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event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
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event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
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event->mmap2.min, event->mmap2.ino,
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event->mmap2.ino_generation,
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(event->mmap2.prot & PROT_READ) ? 'r' : '-',
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(event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
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(event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
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(event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
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event->mmap2.filename);
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}
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size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp)
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{
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struct perf_thread_map *threads = thread_map__new_event(&event->thread_map);
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size_t ret;
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ret = fprintf(fp, " nr: ");
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if (threads)
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ret += thread_map__fprintf(threads, fp);
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else
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ret += fprintf(fp, "failed to get threads from event\n");
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perf_thread_map__put(threads);
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return ret;
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}
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size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp)
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{
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struct perf_cpu_map *cpus = cpu_map__new_data(&event->cpu_map.data);
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size_t ret;
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ret = fprintf(fp, ": ");
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if (cpus)
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ret += cpu_map__fprintf(cpus, fp);
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else
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ret += fprintf(fp, "failed to get cpumap from event\n");
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perf_cpu_map__put(cpus);
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return ret;
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}
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int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
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union perf_event *event,
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struct perf_sample *sample,
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struct machine *machine)
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{
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return machine__process_mmap_event(machine, event, sample);
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}
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int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
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union perf_event *event,
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struct perf_sample *sample,
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struct machine *machine)
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{
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return machine__process_mmap2_event(machine, event, sample);
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}
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size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
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{
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return fprintf(fp, "(%d:%d):(%d:%d)\n",
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event->fork.pid, event->fork.tid,
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event->fork.ppid, event->fork.ptid);
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}
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int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
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union perf_event *event,
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struct perf_sample *sample,
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struct machine *machine)
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{
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return machine__process_fork_event(machine, event, sample);
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}
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int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
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union perf_event *event,
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struct perf_sample *sample,
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struct machine *machine)
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{
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return machine__process_exit_event(machine, event, sample);
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}
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size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp)
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{
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return fprintf(fp, " offset: %#"PRI_lx64" size: %#"PRI_lx64" flags: %#"PRI_lx64" [%s%s%s]\n",
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event->aux.aux_offset, event->aux.aux_size,
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event->aux.flags,
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event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "",
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event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "",
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event->aux.flags & PERF_AUX_FLAG_PARTIAL ? "P" : "");
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}
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size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp)
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{
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return fprintf(fp, " pid: %u tid: %u\n",
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event->itrace_start.pid, event->itrace_start.tid);
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}
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size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp)
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{
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bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
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const char *in_out = !out ? "IN " :
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!(event->header.misc & PERF_RECORD_MISC_SWITCH_OUT_PREEMPT) ?
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"OUT " : "OUT preempt";
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if (event->header.type == PERF_RECORD_SWITCH)
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return fprintf(fp, " %s\n", in_out);
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return fprintf(fp, " %s %s pid/tid: %5u/%-5u\n",
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in_out, out ? "next" : "prev",
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event->context_switch.next_prev_pid,
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event->context_switch.next_prev_tid);
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}
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static size_t perf_event__fprintf_lost(union perf_event *event, FILE *fp)
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{
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return fprintf(fp, " lost %" PRI_lu64 "\n", event->lost.lost);
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}
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size_t perf_event__fprintf_ksymbol(union perf_event *event, FILE *fp)
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{
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return fprintf(fp, " addr %" PRI_lx64 " len %u type %u flags 0x%x name %s\n",
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event->ksymbol.addr, event->ksymbol.len,
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event->ksymbol.ksym_type,
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event->ksymbol.flags, event->ksymbol.name);
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}
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size_t perf_event__fprintf_bpf(union perf_event *event, FILE *fp)
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{
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return fprintf(fp, " type %u, flags %u, id %u\n",
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event->bpf.type, event->bpf.flags, event->bpf.id);
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}
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size_t perf_event__fprintf(union perf_event *event, FILE *fp)
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{
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size_t ret = fprintf(fp, "PERF_RECORD_%s",
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perf_event__name(event->header.type));
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switch (event->header.type) {
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case PERF_RECORD_COMM:
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ret += perf_event__fprintf_comm(event, fp);
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break;
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case PERF_RECORD_FORK:
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case PERF_RECORD_EXIT:
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ret += perf_event__fprintf_task(event, fp);
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break;
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case PERF_RECORD_MMAP:
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ret += perf_event__fprintf_mmap(event, fp);
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break;
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case PERF_RECORD_NAMESPACES:
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ret += perf_event__fprintf_namespaces(event, fp);
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break;
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case PERF_RECORD_MMAP2:
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ret += perf_event__fprintf_mmap2(event, fp);
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break;
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case PERF_RECORD_AUX:
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ret += perf_event__fprintf_aux(event, fp);
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break;
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case PERF_RECORD_ITRACE_START:
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ret += perf_event__fprintf_itrace_start(event, fp);
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break;
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case PERF_RECORD_SWITCH:
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case PERF_RECORD_SWITCH_CPU_WIDE:
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ret += perf_event__fprintf_switch(event, fp);
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break;
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case PERF_RECORD_LOST:
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ret += perf_event__fprintf_lost(event, fp);
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break;
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case PERF_RECORD_KSYMBOL:
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ret += perf_event__fprintf_ksymbol(event, fp);
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break;
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case PERF_RECORD_BPF_EVENT:
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ret += perf_event__fprintf_bpf(event, fp);
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break;
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default:
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ret += fprintf(fp, "\n");
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}
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return ret;
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}
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int perf_event__process(struct perf_tool *tool __maybe_unused,
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union perf_event *event,
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struct perf_sample *sample,
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struct machine *machine)
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{
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return machine__process_event(machine, event, sample);
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}
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struct map *thread__find_map(struct thread *thread, u8 cpumode, u64 addr,
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struct addr_location *al)
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{
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struct map_groups *mg = thread->mg;
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struct machine *machine = mg->machine;
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bool load_map = false;
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al->machine = machine;
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al->thread = thread;
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al->addr = addr;
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al->cpumode = cpumode;
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al->filtered = 0;
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if (machine == NULL) {
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al->map = NULL;
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return NULL;
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}
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if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
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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;
|
|
}
|
|
|
|
al->map = map_groups__find(mg, al->addr);
|
|
if (al->map != NULL) {
|
|
/*
|
|
* Kernel maps might be changed when loading symbols so loading
|
|
* must be done prior to using kernel maps.
|
|
*/
|
|
if (load_map)
|
|
map__load(al->map);
|
|
al->addr = al->map->map_ip(al->map, al->addr);
|
|
}
|
|
|
|
return al->map;
|
|
}
|
|
|
|
/*
|
|
* For branch stacks or branch samples, the sample cpumode might not be correct
|
|
* because it applies only to the sample 'ip' and not necessary to 'addr' or
|
|
* branch stack addresses. If possible, use a fallback to deal with those cases.
|
|
*/
|
|
struct map *thread__find_map_fb(struct thread *thread, u8 cpumode, u64 addr,
|
|
struct addr_location *al)
|
|
{
|
|
struct map *map = thread__find_map(thread, cpumode, addr, al);
|
|
struct machine *machine = thread->mg->machine;
|
|
u8 addr_cpumode = machine__addr_cpumode(machine, cpumode, addr);
|
|
|
|
if (map || addr_cpumode == cpumode)
|
|
return map;
|
|
|
|
return thread__find_map(thread, addr_cpumode, addr, al);
|
|
}
|
|
|
|
struct symbol *thread__find_symbol(struct thread *thread, u8 cpumode,
|
|
u64 addr, struct addr_location *al)
|
|
{
|
|
al->sym = NULL;
|
|
if (thread__find_map(thread, cpumode, addr, al))
|
|
al->sym = map__find_symbol(al->map, al->addr);
|
|
return al->sym;
|
|
}
|
|
|
|
struct symbol *thread__find_symbol_fb(struct thread *thread, u8 cpumode,
|
|
u64 addr, struct addr_location *al)
|
|
{
|
|
al->sym = NULL;
|
|
if (thread__find_map_fb(thread, cpumode, addr, al))
|
|
al->sym = map__find_symbol(al->map, al->addr);
|
|
return al->sym;
|
|
}
|
|
|
|
/*
|
|
* Callers need to drop the reference to al->thread, obtained in
|
|
* machine__findnew_thread()
|
|
*/
|
|
int machine__resolve(struct machine *machine, struct addr_location *al,
|
|
struct perf_sample *sample)
|
|
{
|
|
struct thread *thread = machine__findnew_thread(machine, sample->pid,
|
|
sample->tid);
|
|
|
|
if (thread == NULL)
|
|
return -1;
|
|
|
|
dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
|
|
thread__find_map(thread, sample->cpumode, sample->ip, al);
|
|
dump_printf(" ...... dso: %s\n",
|
|
al->map ? al->map->dso->long_name :
|
|
al->level == 'H' ? "[hypervisor]" : "<not found>");
|
|
|
|
if (thread__is_filtered(thread))
|
|
al->filtered |= (1 << HIST_FILTER__THREAD);
|
|
|
|
al->sym = NULL;
|
|
al->cpu = sample->cpu;
|
|
al->socket = -1;
|
|
al->srcline = NULL;
|
|
|
|
if (al->cpu >= 0) {
|
|
struct perf_env *env = machine->env;
|
|
|
|
if (env && env->cpu)
|
|
al->socket = env->cpu[al->cpu].socket_id;
|
|
}
|
|
|
|
if (al->map) {
|
|
struct dso *dso = al->map->dso;
|
|
|
|
if (symbol_conf.dso_list &&
|
|
(!dso || !(strlist__has_entry(symbol_conf.dso_list,
|
|
dso->short_name) ||
|
|
(dso->short_name != dso->long_name &&
|
|
strlist__has_entry(symbol_conf.dso_list,
|
|
dso->long_name))))) {
|
|
al->filtered |= (1 << HIST_FILTER__DSO);
|
|
}
|
|
|
|
al->sym = map__find_symbol(al->map, al->addr);
|
|
}
|
|
|
|
if (symbol_conf.sym_list &&
|
|
(!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_fb(thread, sample->cpumode, sample->addr, al);
|
|
|
|
al->cpu = sample->cpu;
|
|
al->sym = NULL;
|
|
|
|
if (al->map)
|
|
al->sym = map__find_symbol(al->map, al->addr);
|
|
}
|