3170 lines
87 KiB
C
3170 lines
87 KiB
C
/*
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* builtin-trace.c
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*
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* Builtin 'trace' command:
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*
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* Display a continuously updated trace of any workload, CPU, specific PID,
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* system wide, etc. Default format is loosely strace like, but any other
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* event may be specified using --event.
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*
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* Copyright (C) 2012, 2013, 2014, 2015 Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
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*
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* Initially based on the 'trace' prototype by Thomas Gleixner:
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*
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* http://lwn.net/Articles/415728/ ("Announcing a new utility: 'trace'")
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*
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* Released under the GPL v2. (and only v2, not any later version)
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*/
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#include <traceevent/event-parse.h>
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#include <api/fs/tracing_path.h>
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#include "builtin.h"
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#include "util/color.h"
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#include "util/debug.h"
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#include "util/event.h"
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#include "util/evlist.h"
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#include <subcmd/exec-cmd.h>
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#include "util/machine.h"
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#include "util/path.h"
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#include "util/session.h"
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#include "util/thread.h"
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#include <subcmd/parse-options.h>
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#include "util/strlist.h"
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#include "util/intlist.h"
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#include "util/thread_map.h"
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#include "util/stat.h"
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#include "trace/beauty/beauty.h"
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#include "trace-event.h"
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#include "util/parse-events.h"
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#include "util/bpf-loader.h"
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#include "callchain.h"
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#include "print_binary.h"
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#include "string2.h"
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#include "syscalltbl.h"
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#include "rb_resort.h"
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#include <errno.h>
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#include <inttypes.h>
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#include <libaudit.h> /* FIXME: Still needed for audit_errno_to_name */
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#include <poll.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <string.h>
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#include <linux/err.h>
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#include <linux/filter.h>
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#include <linux/audit.h>
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#include <linux/kernel.h>
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#include <linux/random.h>
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#include <linux/stringify.h>
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#include <linux/time64.h>
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#include "sane_ctype.h"
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#ifndef O_CLOEXEC
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# define O_CLOEXEC 02000000
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#endif
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#ifndef F_LINUX_SPECIFIC_BASE
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# define F_LINUX_SPECIFIC_BASE 1024
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#endif
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struct trace {
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struct perf_tool tool;
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struct syscalltbl *sctbl;
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struct {
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int max;
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struct syscall *table;
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struct {
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struct perf_evsel *sys_enter,
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*sys_exit;
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} events;
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} syscalls;
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struct record_opts opts;
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struct perf_evlist *evlist;
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struct machine *host;
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struct thread *current;
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u64 base_time;
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FILE *output;
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unsigned long nr_events;
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struct strlist *ev_qualifier;
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struct {
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size_t nr;
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int *entries;
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} ev_qualifier_ids;
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struct {
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size_t nr;
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pid_t *entries;
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} filter_pids;
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double duration_filter;
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double runtime_ms;
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struct {
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u64 vfs_getname,
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proc_getname;
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} stats;
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unsigned int max_stack;
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unsigned int min_stack;
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bool not_ev_qualifier;
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bool live;
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bool full_time;
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bool sched;
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bool multiple_threads;
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bool summary;
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bool summary_only;
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bool show_comm;
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bool show_tool_stats;
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bool trace_syscalls;
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bool kernel_syscallchains;
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bool force;
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bool vfs_getname;
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int trace_pgfaults;
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int open_id;
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};
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struct tp_field {
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int offset;
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union {
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u64 (*integer)(struct tp_field *field, struct perf_sample *sample);
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void *(*pointer)(struct tp_field *field, struct perf_sample *sample);
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};
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};
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#define TP_UINT_FIELD(bits) \
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static u64 tp_field__u##bits(struct tp_field *field, struct perf_sample *sample) \
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{ \
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u##bits value; \
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memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \
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return value; \
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}
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TP_UINT_FIELD(8);
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TP_UINT_FIELD(16);
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TP_UINT_FIELD(32);
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TP_UINT_FIELD(64);
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#define TP_UINT_FIELD__SWAPPED(bits) \
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static u64 tp_field__swapped_u##bits(struct tp_field *field, struct perf_sample *sample) \
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{ \
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u##bits value; \
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memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \
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return bswap_##bits(value);\
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}
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TP_UINT_FIELD__SWAPPED(16);
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TP_UINT_FIELD__SWAPPED(32);
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TP_UINT_FIELD__SWAPPED(64);
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static int tp_field__init_uint(struct tp_field *field,
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struct format_field *format_field,
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bool needs_swap)
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{
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field->offset = format_field->offset;
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switch (format_field->size) {
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case 1:
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field->integer = tp_field__u8;
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break;
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case 2:
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field->integer = needs_swap ? tp_field__swapped_u16 : tp_field__u16;
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break;
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case 4:
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field->integer = needs_swap ? tp_field__swapped_u32 : tp_field__u32;
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break;
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case 8:
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field->integer = needs_swap ? tp_field__swapped_u64 : tp_field__u64;
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break;
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default:
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return -1;
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}
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return 0;
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}
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static void *tp_field__ptr(struct tp_field *field, struct perf_sample *sample)
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{
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return sample->raw_data + field->offset;
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}
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static int tp_field__init_ptr(struct tp_field *field, struct format_field *format_field)
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{
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field->offset = format_field->offset;
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field->pointer = tp_field__ptr;
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return 0;
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}
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struct syscall_tp {
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struct tp_field id;
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union {
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struct tp_field args, ret;
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};
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};
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static int perf_evsel__init_tp_uint_field(struct perf_evsel *evsel,
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struct tp_field *field,
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const char *name)
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{
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struct format_field *format_field = perf_evsel__field(evsel, name);
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if (format_field == NULL)
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return -1;
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return tp_field__init_uint(field, format_field, evsel->needs_swap);
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}
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#define perf_evsel__init_sc_tp_uint_field(evsel, name) \
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({ struct syscall_tp *sc = evsel->priv;\
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perf_evsel__init_tp_uint_field(evsel, &sc->name, #name); })
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static int perf_evsel__init_tp_ptr_field(struct perf_evsel *evsel,
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struct tp_field *field,
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const char *name)
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{
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struct format_field *format_field = perf_evsel__field(evsel, name);
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if (format_field == NULL)
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return -1;
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return tp_field__init_ptr(field, format_field);
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}
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#define perf_evsel__init_sc_tp_ptr_field(evsel, name) \
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({ struct syscall_tp *sc = evsel->priv;\
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perf_evsel__init_tp_ptr_field(evsel, &sc->name, #name); })
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static void perf_evsel__delete_priv(struct perf_evsel *evsel)
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{
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zfree(&evsel->priv);
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perf_evsel__delete(evsel);
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}
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static int perf_evsel__init_syscall_tp(struct perf_evsel *evsel, void *handler)
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{
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evsel->priv = malloc(sizeof(struct syscall_tp));
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if (evsel->priv != NULL) {
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if (perf_evsel__init_sc_tp_uint_field(evsel, id))
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goto out_delete;
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evsel->handler = handler;
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return 0;
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}
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return -ENOMEM;
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out_delete:
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zfree(&evsel->priv);
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return -ENOENT;
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}
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static struct perf_evsel *perf_evsel__syscall_newtp(const char *direction, void *handler)
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{
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struct perf_evsel *evsel = perf_evsel__newtp("raw_syscalls", direction);
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/* older kernel (e.g., RHEL6) use syscalls:{enter,exit} */
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if (IS_ERR(evsel))
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evsel = perf_evsel__newtp("syscalls", direction);
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if (IS_ERR(evsel))
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return NULL;
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if (perf_evsel__init_syscall_tp(evsel, handler))
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goto out_delete;
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return evsel;
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out_delete:
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perf_evsel__delete_priv(evsel);
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return NULL;
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}
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#define perf_evsel__sc_tp_uint(evsel, name, sample) \
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({ struct syscall_tp *fields = evsel->priv; \
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fields->name.integer(&fields->name, sample); })
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#define perf_evsel__sc_tp_ptr(evsel, name, sample) \
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({ struct syscall_tp *fields = evsel->priv; \
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fields->name.pointer(&fields->name, sample); })
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size_t strarray__scnprintf(struct strarray *sa, char *bf, size_t size, const char *intfmt, int val)
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{
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int idx = val - sa->offset;
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if (idx < 0 || idx >= sa->nr_entries)
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return scnprintf(bf, size, intfmt, val);
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return scnprintf(bf, size, "%s", sa->entries[idx]);
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}
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static size_t __syscall_arg__scnprintf_strarray(char *bf, size_t size,
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const char *intfmt,
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struct syscall_arg *arg)
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{
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return strarray__scnprintf(arg->parm, bf, size, intfmt, arg->val);
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}
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static size_t syscall_arg__scnprintf_strarray(char *bf, size_t size,
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struct syscall_arg *arg)
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{
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return __syscall_arg__scnprintf_strarray(bf, size, "%d", arg);
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}
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#define SCA_STRARRAY syscall_arg__scnprintf_strarray
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struct strarrays {
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int nr_entries;
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struct strarray **entries;
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};
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#define DEFINE_STRARRAYS(array) struct strarrays strarrays__##array = { \
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.nr_entries = ARRAY_SIZE(array), \
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.entries = array, \
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}
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size_t syscall_arg__scnprintf_strarrays(char *bf, size_t size,
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struct syscall_arg *arg)
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{
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struct strarrays *sas = arg->parm;
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int i;
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for (i = 0; i < sas->nr_entries; ++i) {
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struct strarray *sa = sas->entries[i];
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int idx = arg->val - sa->offset;
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if (idx >= 0 && idx < sa->nr_entries) {
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if (sa->entries[idx] == NULL)
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break;
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return scnprintf(bf, size, "%s", sa->entries[idx]);
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}
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}
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return scnprintf(bf, size, "%d", arg->val);
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}
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#ifndef AT_FDCWD
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#define AT_FDCWD -100
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#endif
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static size_t syscall_arg__scnprintf_fd_at(char *bf, size_t size,
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struct syscall_arg *arg)
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{
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int fd = arg->val;
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if (fd == AT_FDCWD)
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return scnprintf(bf, size, "CWD");
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return syscall_arg__scnprintf_fd(bf, size, arg);
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}
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#define SCA_FDAT syscall_arg__scnprintf_fd_at
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static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
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struct syscall_arg *arg);
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#define SCA_CLOSE_FD syscall_arg__scnprintf_close_fd
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size_t syscall_arg__scnprintf_hex(char *bf, size_t size, struct syscall_arg *arg)
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{
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return scnprintf(bf, size, "%#lx", arg->val);
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}
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size_t syscall_arg__scnprintf_int(char *bf, size_t size, struct syscall_arg *arg)
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{
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return scnprintf(bf, size, "%d", arg->val);
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}
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size_t syscall_arg__scnprintf_long(char *bf, size_t size, struct syscall_arg *arg)
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{
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return scnprintf(bf, size, "%ld", arg->val);
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}
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static const char *bpf_cmd[] = {
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"MAP_CREATE", "MAP_LOOKUP_ELEM", "MAP_UPDATE_ELEM", "MAP_DELETE_ELEM",
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"MAP_GET_NEXT_KEY", "PROG_LOAD",
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};
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static DEFINE_STRARRAY(bpf_cmd);
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static const char *epoll_ctl_ops[] = { "ADD", "DEL", "MOD", };
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static DEFINE_STRARRAY_OFFSET(epoll_ctl_ops, 1);
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static const char *itimers[] = { "REAL", "VIRTUAL", "PROF", };
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static DEFINE_STRARRAY(itimers);
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static const char *keyctl_options[] = {
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"GET_KEYRING_ID", "JOIN_SESSION_KEYRING", "UPDATE", "REVOKE", "CHOWN",
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"SETPERM", "DESCRIBE", "CLEAR", "LINK", "UNLINK", "SEARCH", "READ",
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"INSTANTIATE", "NEGATE", "SET_REQKEY_KEYRING", "SET_TIMEOUT",
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"ASSUME_AUTHORITY", "GET_SECURITY", "SESSION_TO_PARENT", "REJECT",
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"INSTANTIATE_IOV", "INVALIDATE", "GET_PERSISTENT",
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};
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static DEFINE_STRARRAY(keyctl_options);
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static const char *whences[] = { "SET", "CUR", "END",
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#ifdef SEEK_DATA
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"DATA",
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#endif
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#ifdef SEEK_HOLE
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"HOLE",
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#endif
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};
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static DEFINE_STRARRAY(whences);
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static const char *fcntl_cmds[] = {
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"DUPFD", "GETFD", "SETFD", "GETFL", "SETFL", "GETLK", "SETLK",
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"SETLKW", "SETOWN", "GETOWN", "SETSIG", "GETSIG", "GETLK64",
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"SETLK64", "SETLKW64", "SETOWN_EX", "GETOWN_EX",
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"GETOWNER_UIDS",
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};
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static DEFINE_STRARRAY(fcntl_cmds);
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static const char *fcntl_linux_specific_cmds[] = {
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"SETLEASE", "GETLEASE", "NOTIFY", [5] = "CANCELLK", "DUPFD_CLOEXEC",
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"SETPIPE_SZ", "GETPIPE_SZ", "ADD_SEALS", "GET_SEALS",
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"GET_RW_HINT", "SET_RW_HINT", "GET_FILE_RW_HINT", "SET_FILE_RW_HINT",
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};
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|
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static DEFINE_STRARRAY_OFFSET(fcntl_linux_specific_cmds, F_LINUX_SPECIFIC_BASE);
|
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static struct strarray *fcntl_cmds_arrays[] = {
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&strarray__fcntl_cmds,
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&strarray__fcntl_linux_specific_cmds,
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};
|
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|
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static DEFINE_STRARRAYS(fcntl_cmds_arrays);
|
|
|
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static const char *rlimit_resources[] = {
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"CPU", "FSIZE", "DATA", "STACK", "CORE", "RSS", "NPROC", "NOFILE",
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"MEMLOCK", "AS", "LOCKS", "SIGPENDING", "MSGQUEUE", "NICE", "RTPRIO",
|
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"RTTIME",
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};
|
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static DEFINE_STRARRAY(rlimit_resources);
|
|
|
|
static const char *sighow[] = { "BLOCK", "UNBLOCK", "SETMASK", };
|
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static DEFINE_STRARRAY(sighow);
|
|
|
|
static const char *clockid[] = {
|
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"REALTIME", "MONOTONIC", "PROCESS_CPUTIME_ID", "THREAD_CPUTIME_ID",
|
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"MONOTONIC_RAW", "REALTIME_COARSE", "MONOTONIC_COARSE", "BOOTTIME",
|
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"REALTIME_ALARM", "BOOTTIME_ALARM", "SGI_CYCLE", "TAI"
|
|
};
|
|
static DEFINE_STRARRAY(clockid);
|
|
|
|
static const char *socket_families[] = {
|
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"UNSPEC", "LOCAL", "INET", "AX25", "IPX", "APPLETALK", "NETROM",
|
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"BRIDGE", "ATMPVC", "X25", "INET6", "ROSE", "DECnet", "NETBEUI",
|
|
"SECURITY", "KEY", "NETLINK", "PACKET", "ASH", "ECONET", "ATMSVC",
|
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"RDS", "SNA", "IRDA", "PPPOX", "WANPIPE", "LLC", "IB", "CAN", "TIPC",
|
|
"BLUETOOTH", "IUCV", "RXRPC", "ISDN", "PHONET", "IEEE802154", "CAIF",
|
|
"ALG", "NFC", "VSOCK",
|
|
};
|
|
static DEFINE_STRARRAY(socket_families);
|
|
|
|
static size_t syscall_arg__scnprintf_access_mode(char *bf, size_t size,
|
|
struct syscall_arg *arg)
|
|
{
|
|
size_t printed = 0;
|
|
int mode = arg->val;
|
|
|
|
if (mode == F_OK) /* 0 */
|
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return scnprintf(bf, size, "F");
|
|
#define P_MODE(n) \
|
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if (mode & n##_OK) { \
|
|
printed += scnprintf(bf + printed, size - printed, "%s", #n); \
|
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mode &= ~n##_OK; \
|
|
}
|
|
|
|
P_MODE(R);
|
|
P_MODE(W);
|
|
P_MODE(X);
|
|
#undef P_MODE
|
|
|
|
if (mode)
|
|
printed += scnprintf(bf + printed, size - printed, "|%#x", mode);
|
|
|
|
return printed;
|
|
}
|
|
|
|
#define SCA_ACCMODE syscall_arg__scnprintf_access_mode
|
|
|
|
static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
|
|
struct syscall_arg *arg);
|
|
|
|
#define SCA_FILENAME syscall_arg__scnprintf_filename
|
|
|
|
static size_t syscall_arg__scnprintf_pipe_flags(char *bf, size_t size,
|
|
struct syscall_arg *arg)
|
|
{
|
|
int printed = 0, flags = arg->val;
|
|
|
|
#define P_FLAG(n) \
|
|
if (flags & O_##n) { \
|
|
printed += scnprintf(bf + printed, size - printed, "%s%s", printed ? "|" : "", #n); \
|
|
flags &= ~O_##n; \
|
|
}
|
|
|
|
P_FLAG(CLOEXEC);
|
|
P_FLAG(NONBLOCK);
|
|
#undef P_FLAG
|
|
|
|
if (flags)
|
|
printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
|
|
|
|
return printed;
|
|
}
|
|
|
|
#define SCA_PIPE_FLAGS syscall_arg__scnprintf_pipe_flags
|
|
|
|
#ifndef GRND_NONBLOCK
|
|
#define GRND_NONBLOCK 0x0001
|
|
#endif
|
|
#ifndef GRND_RANDOM
|
|
#define GRND_RANDOM 0x0002
|
|
#endif
|
|
|
|
static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size,
|
|
struct syscall_arg *arg)
|
|
{
|
|
int printed = 0, flags = arg->val;
|
|
|
|
#define P_FLAG(n) \
|
|
if (flags & GRND_##n) { \
|
|
printed += scnprintf(bf + printed, size - printed, "%s%s", printed ? "|" : "", #n); \
|
|
flags &= ~GRND_##n; \
|
|
}
|
|
|
|
P_FLAG(RANDOM);
|
|
P_FLAG(NONBLOCK);
|
|
#undef P_FLAG
|
|
|
|
if (flags)
|
|
printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
|
|
|
|
return printed;
|
|
}
|
|
|
|
#define SCA_GETRANDOM_FLAGS syscall_arg__scnprintf_getrandom_flags
|
|
|
|
#define STRARRAY(name, array) \
|
|
{ .scnprintf = SCA_STRARRAY, \
|
|
.parm = &strarray__##array, }
|
|
|
|
#include "trace/beauty/eventfd.c"
|
|
#include "trace/beauty/flock.c"
|
|
#include "trace/beauty/futex_op.c"
|
|
#include "trace/beauty/mmap.c"
|
|
#include "trace/beauty/mode_t.c"
|
|
#include "trace/beauty/msg_flags.c"
|
|
#include "trace/beauty/open_flags.c"
|
|
#include "trace/beauty/perf_event_open.c"
|
|
#include "trace/beauty/pid.c"
|
|
#include "trace/beauty/sched_policy.c"
|
|
#include "trace/beauty/seccomp.c"
|
|
#include "trace/beauty/signum.c"
|
|
#include "trace/beauty/socket_type.c"
|
|
#include "trace/beauty/waitid_options.c"
|
|
|
|
struct syscall_arg_fmt {
|
|
size_t (*scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
|
|
void *parm;
|
|
const char *name;
|
|
bool show_zero;
|
|
};
|
|
|
|
static struct syscall_fmt {
|
|
const char *name;
|
|
const char *alias;
|
|
struct syscall_arg_fmt arg[6];
|
|
u8 nr_args;
|
|
bool errpid;
|
|
bool timeout;
|
|
bool hexret;
|
|
} syscall_fmts[] = {
|
|
{ .name = "access",
|
|
.arg = { [1] = { .scnprintf = SCA_ACCMODE, /* mode */ }, }, },
|
|
{ .name = "bpf",
|
|
.arg = { [0] = STRARRAY(cmd, bpf_cmd), }, },
|
|
{ .name = "brk", .hexret = true,
|
|
.arg = { [0] = { .scnprintf = SCA_HEX, /* brk */ }, }, },
|
|
{ .name = "clock_gettime",
|
|
.arg = { [0] = STRARRAY(clk_id, clockid), }, },
|
|
{ .name = "clone", .errpid = true, .nr_args = 5,
|
|
.arg = { [0] = { .name = "flags", .scnprintf = SCA_CLONE_FLAGS, },
|
|
[1] = { .name = "child_stack", .scnprintf = SCA_HEX, },
|
|
[2] = { .name = "parent_tidptr", .scnprintf = SCA_HEX, },
|
|
[3] = { .name = "child_tidptr", .scnprintf = SCA_HEX, },
|
|
[4] = { .name = "tls", .scnprintf = SCA_HEX, }, }, },
|
|
{ .name = "close",
|
|
.arg = { [0] = { .scnprintf = SCA_CLOSE_FD, /* fd */ }, }, },
|
|
{ .name = "epoll_ctl",
|
|
.arg = { [1] = STRARRAY(op, epoll_ctl_ops), }, },
|
|
{ .name = "eventfd2",
|
|
.arg = { [1] = { .scnprintf = SCA_EFD_FLAGS, /* flags */ }, }, },
|
|
{ .name = "fchmodat",
|
|
.arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
|
|
{ .name = "fchownat",
|
|
.arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
|
|
{ .name = "fcntl",
|
|
.arg = { [1] = { .scnprintf = SCA_FCNTL_CMD, /* cmd */
|
|
.parm = &strarrays__fcntl_cmds_arrays,
|
|
.show_zero = true, },
|
|
[2] = { .scnprintf = SCA_FCNTL_ARG, /* arg */ }, }, },
|
|
{ .name = "flock",
|
|
.arg = { [1] = { .scnprintf = SCA_FLOCK, /* cmd */ }, }, },
|
|
{ .name = "fstat", .alias = "newfstat", },
|
|
{ .name = "fstatat", .alias = "newfstatat", },
|
|
{ .name = "futex",
|
|
.arg = { [1] = { .scnprintf = SCA_FUTEX_OP, /* op */ }, }, },
|
|
{ .name = "futimesat",
|
|
.arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
|
|
{ .name = "getitimer",
|
|
.arg = { [0] = STRARRAY(which, itimers), }, },
|
|
{ .name = "getpid", .errpid = true, },
|
|
{ .name = "getpgid", .errpid = true, },
|
|
{ .name = "getppid", .errpid = true, },
|
|
{ .name = "getrandom",
|
|
.arg = { [2] = { .scnprintf = SCA_GETRANDOM_FLAGS, /* flags */ }, }, },
|
|
{ .name = "getrlimit",
|
|
.arg = { [0] = STRARRAY(resource, rlimit_resources), }, },
|
|
{ .name = "ioctl",
|
|
.arg = {
|
|
#if defined(__i386__) || defined(__x86_64__)
|
|
/*
|
|
* FIXME: Make this available to all arches.
|
|
*/
|
|
[1] = { .scnprintf = SCA_IOCTL_CMD, /* cmd */ },
|
|
[2] = { .scnprintf = SCA_HEX, /* arg */ }, }, },
|
|
#else
|
|
[2] = { .scnprintf = SCA_HEX, /* arg */ }, }, },
|
|
#endif
|
|
{ .name = "kcmp", .nr_args = 5,
|
|
.arg = { [0] = { .name = "pid1", .scnprintf = SCA_PID, },
|
|
[1] = { .name = "pid2", .scnprintf = SCA_PID, },
|
|
[2] = { .name = "type", .scnprintf = SCA_KCMP_TYPE, },
|
|
[3] = { .name = "idx1", .scnprintf = SCA_KCMP_IDX, },
|
|
[4] = { .name = "idx2", .scnprintf = SCA_KCMP_IDX, }, }, },
|
|
{ .name = "keyctl",
|
|
.arg = { [0] = STRARRAY(option, keyctl_options), }, },
|
|
{ .name = "kill",
|
|
.arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
|
|
{ .name = "linkat",
|
|
.arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
|
|
{ .name = "lseek",
|
|
.arg = { [2] = STRARRAY(whence, whences), }, },
|
|
{ .name = "lstat", .alias = "newlstat", },
|
|
{ .name = "madvise",
|
|
.arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
|
|
[2] = { .scnprintf = SCA_MADV_BHV, /* behavior */ }, }, },
|
|
{ .name = "mkdirat",
|
|
.arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
|
|
{ .name = "mknodat",
|
|
.arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
|
|
{ .name = "mlock",
|
|
.arg = { [0] = { .scnprintf = SCA_HEX, /* addr */ }, }, },
|
|
{ .name = "mlockall",
|
|
.arg = { [0] = { .scnprintf = SCA_HEX, /* addr */ }, }, },
|
|
{ .name = "mmap", .hexret = true,
|
|
/* The standard mmap maps to old_mmap on s390x */
|
|
#if defined(__s390x__)
|
|
.alias = "old_mmap",
|
|
#endif
|
|
.arg = { [0] = { .scnprintf = SCA_HEX, /* addr */ },
|
|
[2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ },
|
|
[3] = { .scnprintf = SCA_MMAP_FLAGS, /* flags */ }, }, },
|
|
{ .name = "mprotect",
|
|
.arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
|
|
[2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, }, },
|
|
{ .name = "mq_unlink",
|
|
.arg = { [0] = { .scnprintf = SCA_FILENAME, /* u_name */ }, }, },
|
|
{ .name = "mremap", .hexret = true,
|
|
.arg = { [0] = { .scnprintf = SCA_HEX, /* addr */ },
|
|
[3] = { .scnprintf = SCA_MREMAP_FLAGS, /* flags */ },
|
|
[4] = { .scnprintf = SCA_HEX, /* new_addr */ }, }, },
|
|
{ .name = "munlock",
|
|
.arg = { [0] = { .scnprintf = SCA_HEX, /* addr */ }, }, },
|
|
{ .name = "munmap",
|
|
.arg = { [0] = { .scnprintf = SCA_HEX, /* addr */ }, }, },
|
|
{ .name = "name_to_handle_at",
|
|
.arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
|
|
{ .name = "newfstatat",
|
|
.arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
|
|
{ .name = "open",
|
|
.arg = { [1] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
|
|
{ .name = "open_by_handle_at",
|
|
.arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
|
|
[2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
|
|
{ .name = "openat",
|
|
.arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
|
|
[2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
|
|
{ .name = "perf_event_open",
|
|
.arg = { [2] = { .scnprintf = SCA_INT, /* cpu */ },
|
|
[3] = { .scnprintf = SCA_FD, /* group_fd */ },
|
|
[4] = { .scnprintf = SCA_PERF_FLAGS, /* flags */ }, }, },
|
|
{ .name = "pipe2",
|
|
.arg = { [1] = { .scnprintf = SCA_PIPE_FLAGS, /* flags */ }, }, },
|
|
{ .name = "pkey_alloc",
|
|
.arg = { [1] = { .scnprintf = SCA_PKEY_ALLOC_ACCESS_RIGHTS, /* access_rights */ }, }, },
|
|
{ .name = "pkey_free",
|
|
.arg = { [0] = { .scnprintf = SCA_INT, /* key */ }, }, },
|
|
{ .name = "pkey_mprotect",
|
|
.arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
|
|
[2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ },
|
|
[3] = { .scnprintf = SCA_INT, /* pkey */ }, }, },
|
|
{ .name = "poll", .timeout = true, },
|
|
{ .name = "ppoll", .timeout = true, },
|
|
{ .name = "prctl", .alias = "arch_prctl",
|
|
.arg = { [0] = { .scnprintf = SCA_PRCTL_OPTION, /* option */ },
|
|
[1] = { .scnprintf = SCA_PRCTL_ARG2, /* arg2 */ },
|
|
[2] = { .scnprintf = SCA_PRCTL_ARG3, /* arg3 */ }, }, },
|
|
{ .name = "pread", .alias = "pread64", },
|
|
{ .name = "preadv", .alias = "pread", },
|
|
{ .name = "prlimit64",
|
|
.arg = { [1] = STRARRAY(resource, rlimit_resources), }, },
|
|
{ .name = "pwrite", .alias = "pwrite64", },
|
|
{ .name = "readlinkat",
|
|
.arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
|
|
{ .name = "recvfrom",
|
|
.arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
|
|
{ .name = "recvmmsg",
|
|
.arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
|
|
{ .name = "recvmsg",
|
|
.arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
|
|
{ .name = "renameat",
|
|
.arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
|
|
{ .name = "rt_sigaction",
|
|
.arg = { [0] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
|
|
{ .name = "rt_sigprocmask",
|
|
.arg = { [0] = STRARRAY(how, sighow), }, },
|
|
{ .name = "rt_sigqueueinfo",
|
|
.arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
|
|
{ .name = "rt_tgsigqueueinfo",
|
|
.arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
|
|
{ .name = "sched_setscheduler",
|
|
.arg = { [1] = { .scnprintf = SCA_SCHED_POLICY, /* policy */ }, }, },
|
|
{ .name = "seccomp",
|
|
.arg = { [0] = { .scnprintf = SCA_SECCOMP_OP, /* op */ },
|
|
[1] = { .scnprintf = SCA_SECCOMP_FLAGS, /* flags */ }, }, },
|
|
{ .name = "select", .timeout = true, },
|
|
{ .name = "sendmmsg",
|
|
.arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
|
|
{ .name = "sendmsg",
|
|
.arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
|
|
{ .name = "sendto",
|
|
.arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
|
|
{ .name = "set_tid_address", .errpid = true, },
|
|
{ .name = "setitimer",
|
|
.arg = { [0] = STRARRAY(which, itimers), }, },
|
|
{ .name = "setrlimit",
|
|
.arg = { [0] = STRARRAY(resource, rlimit_resources), }, },
|
|
{ .name = "socket",
|
|
.arg = { [0] = STRARRAY(family, socket_families),
|
|
[1] = { .scnprintf = SCA_SK_TYPE, /* type */ }, }, },
|
|
{ .name = "socketpair",
|
|
.arg = { [0] = STRARRAY(family, socket_families),
|
|
[1] = { .scnprintf = SCA_SK_TYPE, /* type */ }, }, },
|
|
{ .name = "stat", .alias = "newstat", },
|
|
{ .name = "statx",
|
|
.arg = { [0] = { .scnprintf = SCA_FDAT, /* fdat */ },
|
|
[2] = { .scnprintf = SCA_STATX_FLAGS, /* flags */ } ,
|
|
[3] = { .scnprintf = SCA_STATX_MASK, /* mask */ }, }, },
|
|
{ .name = "swapoff",
|
|
.arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, },
|
|
{ .name = "swapon",
|
|
.arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, },
|
|
{ .name = "symlinkat",
|
|
.arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
|
|
{ .name = "tgkill",
|
|
.arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
|
|
{ .name = "tkill",
|
|
.arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
|
|
{ .name = "uname", .alias = "newuname", },
|
|
{ .name = "unlinkat",
|
|
.arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
|
|
{ .name = "utimensat",
|
|
.arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ }, }, },
|
|
{ .name = "wait4", .errpid = true,
|
|
.arg = { [2] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, },
|
|
{ .name = "waitid", .errpid = true,
|
|
.arg = { [3] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, },
|
|
};
|
|
|
|
static int syscall_fmt__cmp(const void *name, const void *fmtp)
|
|
{
|
|
const struct syscall_fmt *fmt = fmtp;
|
|
return strcmp(name, fmt->name);
|
|
}
|
|
|
|
static struct syscall_fmt *syscall_fmt__find(const char *name)
|
|
{
|
|
const int nmemb = ARRAY_SIZE(syscall_fmts);
|
|
return bsearch(name, syscall_fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp);
|
|
}
|
|
|
|
struct syscall {
|
|
struct event_format *tp_format;
|
|
int nr_args;
|
|
struct format_field *args;
|
|
const char *name;
|
|
bool is_exit;
|
|
struct syscall_fmt *fmt;
|
|
struct syscall_arg_fmt *arg_fmt;
|
|
};
|
|
|
|
/*
|
|
* We need to have this 'calculated' boolean because in some cases we really
|
|
* don't know what is the duration of a syscall, for instance, when we start
|
|
* a session and some threads are waiting for a syscall to finish, say 'poll',
|
|
* in which case all we can do is to print "( ? ) for duration and for the
|
|
* start timestamp.
|
|
*/
|
|
static size_t fprintf_duration(unsigned long t, bool calculated, FILE *fp)
|
|
{
|
|
double duration = (double)t / NSEC_PER_MSEC;
|
|
size_t printed = fprintf(fp, "(");
|
|
|
|
if (!calculated)
|
|
printed += fprintf(fp, " ? ");
|
|
else if (duration >= 1.0)
|
|
printed += color_fprintf(fp, PERF_COLOR_RED, "%6.3f ms", duration);
|
|
else if (duration >= 0.01)
|
|
printed += color_fprintf(fp, PERF_COLOR_YELLOW, "%6.3f ms", duration);
|
|
else
|
|
printed += color_fprintf(fp, PERF_COLOR_NORMAL, "%6.3f ms", duration);
|
|
return printed + fprintf(fp, "): ");
|
|
}
|
|
|
|
/**
|
|
* filename.ptr: The filename char pointer that will be vfs_getname'd
|
|
* filename.entry_str_pos: Where to insert the string translated from
|
|
* filename.ptr by the vfs_getname tracepoint/kprobe.
|
|
* ret_scnprintf: syscall args may set this to a different syscall return
|
|
* formatter, for instance, fcntl may return fds, file flags, etc.
|
|
*/
|
|
struct thread_trace {
|
|
u64 entry_time;
|
|
bool entry_pending;
|
|
unsigned long nr_events;
|
|
unsigned long pfmaj, pfmin;
|
|
char *entry_str;
|
|
double runtime_ms;
|
|
size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
|
|
struct {
|
|
unsigned long ptr;
|
|
short int entry_str_pos;
|
|
bool pending_open;
|
|
unsigned int namelen;
|
|
char *name;
|
|
} filename;
|
|
struct {
|
|
int max;
|
|
char **table;
|
|
} paths;
|
|
|
|
struct intlist *syscall_stats;
|
|
};
|
|
|
|
static struct thread_trace *thread_trace__new(void)
|
|
{
|
|
struct thread_trace *ttrace = zalloc(sizeof(struct thread_trace));
|
|
|
|
if (ttrace)
|
|
ttrace->paths.max = -1;
|
|
|
|
ttrace->syscall_stats = intlist__new(NULL);
|
|
|
|
return ttrace;
|
|
}
|
|
|
|
static struct thread_trace *thread__trace(struct thread *thread, FILE *fp)
|
|
{
|
|
struct thread_trace *ttrace;
|
|
|
|
if (thread == NULL)
|
|
goto fail;
|
|
|
|
if (thread__priv(thread) == NULL)
|
|
thread__set_priv(thread, thread_trace__new());
|
|
|
|
if (thread__priv(thread) == NULL)
|
|
goto fail;
|
|
|
|
ttrace = thread__priv(thread);
|
|
++ttrace->nr_events;
|
|
|
|
return ttrace;
|
|
fail:
|
|
color_fprintf(fp, PERF_COLOR_RED,
|
|
"WARNING: not enough memory, dropping samples!\n");
|
|
return NULL;
|
|
}
|
|
|
|
|
|
void syscall_arg__set_ret_scnprintf(struct syscall_arg *arg,
|
|
size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg))
|
|
{
|
|
struct thread_trace *ttrace = thread__priv(arg->thread);
|
|
|
|
ttrace->ret_scnprintf = ret_scnprintf;
|
|
}
|
|
|
|
#define TRACE_PFMAJ (1 << 0)
|
|
#define TRACE_PFMIN (1 << 1)
|
|
|
|
static const size_t trace__entry_str_size = 2048;
|
|
|
|
static int trace__set_fd_pathname(struct thread *thread, int fd, const char *pathname)
|
|
{
|
|
struct thread_trace *ttrace = thread__priv(thread);
|
|
|
|
if (fd > ttrace->paths.max) {
|
|
char **npath = realloc(ttrace->paths.table, (fd + 1) * sizeof(char *));
|
|
|
|
if (npath == NULL)
|
|
return -1;
|
|
|
|
if (ttrace->paths.max != -1) {
|
|
memset(npath + ttrace->paths.max + 1, 0,
|
|
(fd - ttrace->paths.max) * sizeof(char *));
|
|
} else {
|
|
memset(npath, 0, (fd + 1) * sizeof(char *));
|
|
}
|
|
|
|
ttrace->paths.table = npath;
|
|
ttrace->paths.max = fd;
|
|
}
|
|
|
|
ttrace->paths.table[fd] = strdup(pathname);
|
|
|
|
return ttrace->paths.table[fd] != NULL ? 0 : -1;
|
|
}
|
|
|
|
static int thread__read_fd_path(struct thread *thread, int fd)
|
|
{
|
|
char linkname[PATH_MAX], pathname[PATH_MAX];
|
|
struct stat st;
|
|
int ret;
|
|
|
|
if (thread->pid_ == thread->tid) {
|
|
scnprintf(linkname, sizeof(linkname),
|
|
"/proc/%d/fd/%d", thread->pid_, fd);
|
|
} else {
|
|
scnprintf(linkname, sizeof(linkname),
|
|
"/proc/%d/task/%d/fd/%d", thread->pid_, thread->tid, fd);
|
|
}
|
|
|
|
if (lstat(linkname, &st) < 0 || st.st_size + 1 > (off_t)sizeof(pathname))
|
|
return -1;
|
|
|
|
ret = readlink(linkname, pathname, sizeof(pathname));
|
|
|
|
if (ret < 0 || ret > st.st_size)
|
|
return -1;
|
|
|
|
pathname[ret] = '\0';
|
|
return trace__set_fd_pathname(thread, fd, pathname);
|
|
}
|
|
|
|
static const char *thread__fd_path(struct thread *thread, int fd,
|
|
struct trace *trace)
|
|
{
|
|
struct thread_trace *ttrace = thread__priv(thread);
|
|
|
|
if (ttrace == NULL)
|
|
return NULL;
|
|
|
|
if (fd < 0)
|
|
return NULL;
|
|
|
|
if ((fd > ttrace->paths.max || ttrace->paths.table[fd] == NULL)) {
|
|
if (!trace->live)
|
|
return NULL;
|
|
++trace->stats.proc_getname;
|
|
if (thread__read_fd_path(thread, fd))
|
|
return NULL;
|
|
}
|
|
|
|
return ttrace->paths.table[fd];
|
|
}
|
|
|
|
size_t syscall_arg__scnprintf_fd(char *bf, size_t size, struct syscall_arg *arg)
|
|
{
|
|
int fd = arg->val;
|
|
size_t printed = scnprintf(bf, size, "%d", fd);
|
|
const char *path = thread__fd_path(arg->thread, fd, arg->trace);
|
|
|
|
if (path)
|
|
printed += scnprintf(bf + printed, size - printed, "<%s>", path);
|
|
|
|
return printed;
|
|
}
|
|
|
|
size_t pid__scnprintf_fd(struct trace *trace, pid_t pid, int fd, char *bf, size_t size)
|
|
{
|
|
size_t printed = scnprintf(bf, size, "%d", fd);
|
|
struct thread *thread = machine__find_thread(trace->host, pid, pid);
|
|
|
|
if (thread) {
|
|
const char *path = thread__fd_path(thread, fd, trace);
|
|
|
|
if (path)
|
|
printed += scnprintf(bf + printed, size - printed, "<%s>", path);
|
|
|
|
thread__put(thread);
|
|
}
|
|
|
|
return printed;
|
|
}
|
|
|
|
static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
|
|
struct syscall_arg *arg)
|
|
{
|
|
int fd = arg->val;
|
|
size_t printed = syscall_arg__scnprintf_fd(bf, size, arg);
|
|
struct thread_trace *ttrace = thread__priv(arg->thread);
|
|
|
|
if (ttrace && fd >= 0 && fd <= ttrace->paths.max)
|
|
zfree(&ttrace->paths.table[fd]);
|
|
|
|
return printed;
|
|
}
|
|
|
|
static void thread__set_filename_pos(struct thread *thread, const char *bf,
|
|
unsigned long ptr)
|
|
{
|
|
struct thread_trace *ttrace = thread__priv(thread);
|
|
|
|
ttrace->filename.ptr = ptr;
|
|
ttrace->filename.entry_str_pos = bf - ttrace->entry_str;
|
|
}
|
|
|
|
static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
|
|
struct syscall_arg *arg)
|
|
{
|
|
unsigned long ptr = arg->val;
|
|
|
|
if (!arg->trace->vfs_getname)
|
|
return scnprintf(bf, size, "%#x", ptr);
|
|
|
|
thread__set_filename_pos(arg->thread, bf, ptr);
|
|
return 0;
|
|
}
|
|
|
|
static bool trace__filter_duration(struct trace *trace, double t)
|
|
{
|
|
return t < (trace->duration_filter * NSEC_PER_MSEC);
|
|
}
|
|
|
|
static size_t __trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
|
|
{
|
|
double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC;
|
|
|
|
return fprintf(fp, "%10.3f ", ts);
|
|
}
|
|
|
|
/*
|
|
* We're handling tstamp=0 as an undefined tstamp, i.e. like when we are
|
|
* using ttrace->entry_time for a thread that receives a sys_exit without
|
|
* first having received a sys_enter ("poll" issued before tracing session
|
|
* starts, lost sys_enter exit due to ring buffer overflow).
|
|
*/
|
|
static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
|
|
{
|
|
if (tstamp > 0)
|
|
return __trace__fprintf_tstamp(trace, tstamp, fp);
|
|
|
|
return fprintf(fp, " ? ");
|
|
}
|
|
|
|
static bool done = false;
|
|
static bool interrupted = false;
|
|
|
|
static void sig_handler(int sig)
|
|
{
|
|
done = true;
|
|
interrupted = sig == SIGINT;
|
|
}
|
|
|
|
static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thread,
|
|
u64 duration, bool duration_calculated, u64 tstamp, FILE *fp)
|
|
{
|
|
size_t printed = trace__fprintf_tstamp(trace, tstamp, fp);
|
|
printed += fprintf_duration(duration, duration_calculated, fp);
|
|
|
|
if (trace->multiple_threads) {
|
|
if (trace->show_comm)
|
|
printed += fprintf(fp, "%.14s/", thread__comm_str(thread));
|
|
printed += fprintf(fp, "%d ", thread->tid);
|
|
}
|
|
|
|
return printed;
|
|
}
|
|
|
|
static int trace__process_event(struct trace *trace, struct machine *machine,
|
|
union perf_event *event, struct perf_sample *sample)
|
|
{
|
|
int ret = 0;
|
|
|
|
switch (event->header.type) {
|
|
case PERF_RECORD_LOST:
|
|
color_fprintf(trace->output, PERF_COLOR_RED,
|
|
"LOST %" PRIu64 " events!\n", event->lost.lost);
|
|
ret = machine__process_lost_event(machine, event, sample);
|
|
break;
|
|
default:
|
|
ret = machine__process_event(machine, event, sample);
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int trace__tool_process(struct perf_tool *tool,
|
|
union perf_event *event,
|
|
struct perf_sample *sample,
|
|
struct machine *machine)
|
|
{
|
|
struct trace *trace = container_of(tool, struct trace, tool);
|
|
return trace__process_event(trace, machine, event, sample);
|
|
}
|
|
|
|
static char *trace__machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp)
|
|
{
|
|
struct machine *machine = vmachine;
|
|
|
|
if (machine->kptr_restrict_warned)
|
|
return NULL;
|
|
|
|
if (symbol_conf.kptr_restrict) {
|
|
pr_warning("Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
|
|
"Check /proc/sys/kernel/kptr_restrict.\n\n"
|
|
"Kernel samples will not be resolved.\n");
|
|
machine->kptr_restrict_warned = true;
|
|
return NULL;
|
|
}
|
|
|
|
return machine__resolve_kernel_addr(vmachine, addrp, modp);
|
|
}
|
|
|
|
static int trace__symbols_init(struct trace *trace, struct perf_evlist *evlist)
|
|
{
|
|
int err = symbol__init(NULL);
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
trace->host = machine__new_host();
|
|
if (trace->host == NULL)
|
|
return -ENOMEM;
|
|
|
|
err = trace_event__register_resolver(trace->host, trace__machine__resolve_kernel_addr);
|
|
if (err < 0)
|
|
goto out;
|
|
|
|
err = __machine__synthesize_threads(trace->host, &trace->tool, &trace->opts.target,
|
|
evlist->threads, trace__tool_process, false,
|
|
trace->opts.proc_map_timeout, 1);
|
|
out:
|
|
if (err)
|
|
symbol__exit();
|
|
|
|
return err;
|
|
}
|
|
|
|
static void trace__symbols__exit(struct trace *trace)
|
|
{
|
|
machine__exit(trace->host);
|
|
trace->host = NULL;
|
|
|
|
symbol__exit();
|
|
}
|
|
|
|
static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args)
|
|
{
|
|
int idx;
|
|
|
|
if (nr_args == 6 && sc->fmt && sc->fmt->nr_args != 0)
|
|
nr_args = sc->fmt->nr_args;
|
|
|
|
sc->arg_fmt = calloc(nr_args, sizeof(*sc->arg_fmt));
|
|
if (sc->arg_fmt == NULL)
|
|
return -1;
|
|
|
|
for (idx = 0; idx < nr_args; ++idx) {
|
|
if (sc->fmt)
|
|
sc->arg_fmt[idx] = sc->fmt->arg[idx];
|
|
}
|
|
|
|
sc->nr_args = nr_args;
|
|
return 0;
|
|
}
|
|
|
|
static int syscall__set_arg_fmts(struct syscall *sc)
|
|
{
|
|
struct format_field *field;
|
|
int idx = 0, len;
|
|
|
|
for (field = sc->args; field; field = field->next, ++idx) {
|
|
if (sc->fmt && sc->fmt->arg[idx].scnprintf)
|
|
continue;
|
|
|
|
if (strcmp(field->type, "const char *") == 0 &&
|
|
(strcmp(field->name, "filename") == 0 ||
|
|
strcmp(field->name, "path") == 0 ||
|
|
strcmp(field->name, "pathname") == 0))
|
|
sc->arg_fmt[idx].scnprintf = SCA_FILENAME;
|
|
else if (field->flags & FIELD_IS_POINTER)
|
|
sc->arg_fmt[idx].scnprintf = syscall_arg__scnprintf_hex;
|
|
else if (strcmp(field->type, "pid_t") == 0)
|
|
sc->arg_fmt[idx].scnprintf = SCA_PID;
|
|
else if (strcmp(field->type, "umode_t") == 0)
|
|
sc->arg_fmt[idx].scnprintf = SCA_MODE_T;
|
|
else if ((strcmp(field->type, "int") == 0 ||
|
|
strcmp(field->type, "unsigned int") == 0 ||
|
|
strcmp(field->type, "long") == 0) &&
|
|
(len = strlen(field->name)) >= 2 &&
|
|
strcmp(field->name + len - 2, "fd") == 0) {
|
|
/*
|
|
* /sys/kernel/tracing/events/syscalls/sys_enter*
|
|
* egrep 'field:.*fd;' .../format|sed -r 's/.*field:([a-z ]+) [a-z_]*fd.+/\1/g'|sort|uniq -c
|
|
* 65 int
|
|
* 23 unsigned int
|
|
* 7 unsigned long
|
|
*/
|
|
sc->arg_fmt[idx].scnprintf = SCA_FD;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int trace__read_syscall_info(struct trace *trace, int id)
|
|
{
|
|
char tp_name[128];
|
|
struct syscall *sc;
|
|
const char *name = syscalltbl__name(trace->sctbl, id);
|
|
|
|
if (name == NULL)
|
|
return -1;
|
|
|
|
if (id > trace->syscalls.max) {
|
|
struct syscall *nsyscalls = realloc(trace->syscalls.table, (id + 1) * sizeof(*sc));
|
|
|
|
if (nsyscalls == NULL)
|
|
return -1;
|
|
|
|
if (trace->syscalls.max != -1) {
|
|
memset(nsyscalls + trace->syscalls.max + 1, 0,
|
|
(id - trace->syscalls.max) * sizeof(*sc));
|
|
} else {
|
|
memset(nsyscalls, 0, (id + 1) * sizeof(*sc));
|
|
}
|
|
|
|
trace->syscalls.table = nsyscalls;
|
|
trace->syscalls.max = id;
|
|
}
|
|
|
|
sc = trace->syscalls.table + id;
|
|
sc->name = name;
|
|
|
|
sc->fmt = syscall_fmt__find(sc->name);
|
|
|
|
snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name);
|
|
sc->tp_format = trace_event__tp_format("syscalls", tp_name);
|
|
|
|
if (IS_ERR(sc->tp_format) && sc->fmt && sc->fmt->alias) {
|
|
snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->fmt->alias);
|
|
sc->tp_format = trace_event__tp_format("syscalls", tp_name);
|
|
}
|
|
|
|
if (syscall__alloc_arg_fmts(sc, IS_ERR(sc->tp_format) ? 6 : sc->tp_format->format.nr_fields))
|
|
return -1;
|
|
|
|
if (IS_ERR(sc->tp_format))
|
|
return -1;
|
|
|
|
sc->args = sc->tp_format->format.fields;
|
|
/*
|
|
* We need to check and discard the first variable '__syscall_nr'
|
|
* or 'nr' that mean the syscall number. It is needless here.
|
|
* So drop '__syscall_nr' or 'nr' field but does not exist on older kernels.
|
|
*/
|
|
if (sc->args && (!strcmp(sc->args->name, "__syscall_nr") || !strcmp(sc->args->name, "nr"))) {
|
|
sc->args = sc->args->next;
|
|
--sc->nr_args;
|
|
}
|
|
|
|
sc->is_exit = !strcmp(name, "exit_group") || !strcmp(name, "exit");
|
|
|
|
return syscall__set_arg_fmts(sc);
|
|
}
|
|
|
|
static int trace__validate_ev_qualifier(struct trace *trace)
|
|
{
|
|
int err = 0, i;
|
|
size_t nr_allocated;
|
|
struct str_node *pos;
|
|
|
|
trace->ev_qualifier_ids.nr = strlist__nr_entries(trace->ev_qualifier);
|
|
trace->ev_qualifier_ids.entries = malloc(trace->ev_qualifier_ids.nr *
|
|
sizeof(trace->ev_qualifier_ids.entries[0]));
|
|
|
|
if (trace->ev_qualifier_ids.entries == NULL) {
|
|
fputs("Error:\tNot enough memory for allocating events qualifier ids\n",
|
|
trace->output);
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
nr_allocated = trace->ev_qualifier_ids.nr;
|
|
i = 0;
|
|
|
|
strlist__for_each_entry(pos, trace->ev_qualifier) {
|
|
const char *sc = pos->s;
|
|
int id = syscalltbl__id(trace->sctbl, sc), match_next = -1;
|
|
|
|
if (id < 0) {
|
|
id = syscalltbl__strglobmatch_first(trace->sctbl, sc, &match_next);
|
|
if (id >= 0)
|
|
goto matches;
|
|
|
|
if (err == 0) {
|
|
fputs("Error:\tInvalid syscall ", trace->output);
|
|
err = -EINVAL;
|
|
} else {
|
|
fputs(", ", trace->output);
|
|
}
|
|
|
|
fputs(sc, trace->output);
|
|
}
|
|
matches:
|
|
trace->ev_qualifier_ids.entries[i++] = id;
|
|
if (match_next == -1)
|
|
continue;
|
|
|
|
while (1) {
|
|
id = syscalltbl__strglobmatch_next(trace->sctbl, sc, &match_next);
|
|
if (id < 0)
|
|
break;
|
|
if (nr_allocated == trace->ev_qualifier_ids.nr) {
|
|
void *entries;
|
|
|
|
nr_allocated += 8;
|
|
entries = realloc(trace->ev_qualifier_ids.entries,
|
|
nr_allocated * sizeof(trace->ev_qualifier_ids.entries[0]));
|
|
if (entries == NULL) {
|
|
err = -ENOMEM;
|
|
fputs("\nError:\t Not enough memory for parsing\n", trace->output);
|
|
goto out_free;
|
|
}
|
|
trace->ev_qualifier_ids.entries = entries;
|
|
}
|
|
trace->ev_qualifier_ids.nr++;
|
|
trace->ev_qualifier_ids.entries[i++] = id;
|
|
}
|
|
}
|
|
|
|
if (err < 0) {
|
|
fputs("\nHint:\ttry 'perf list syscalls:sys_enter_*'"
|
|
"\nHint:\tand: 'man syscalls'\n", trace->output);
|
|
out_free:
|
|
zfree(&trace->ev_qualifier_ids.entries);
|
|
trace->ev_qualifier_ids.nr = 0;
|
|
}
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* args is to be interpreted as a series of longs but we need to handle
|
|
* 8-byte unaligned accesses. args points to raw_data within the event
|
|
* and raw_data is guaranteed to be 8-byte unaligned because it is
|
|
* preceded by raw_size which is a u32. So we need to copy args to a temp
|
|
* variable to read it. Most notably this avoids extended load instructions
|
|
* on unaligned addresses
|
|
*/
|
|
unsigned long syscall_arg__val(struct syscall_arg *arg, u8 idx)
|
|
{
|
|
unsigned long val;
|
|
unsigned char *p = arg->args + sizeof(unsigned long) * idx;
|
|
|
|
memcpy(&val, p, sizeof(val));
|
|
return val;
|
|
}
|
|
|
|
static size_t syscall__scnprintf_name(struct syscall *sc, char *bf, size_t size,
|
|
struct syscall_arg *arg)
|
|
{
|
|
if (sc->arg_fmt && sc->arg_fmt[arg->idx].name)
|
|
return scnprintf(bf, size, "%s: ", sc->arg_fmt[arg->idx].name);
|
|
|
|
return scnprintf(bf, size, "arg%d: ", arg->idx);
|
|
}
|
|
|
|
static size_t syscall__scnprintf_val(struct syscall *sc, char *bf, size_t size,
|
|
struct syscall_arg *arg, unsigned long val)
|
|
{
|
|
if (sc->arg_fmt && sc->arg_fmt[arg->idx].scnprintf) {
|
|
arg->val = val;
|
|
if (sc->arg_fmt[arg->idx].parm)
|
|
arg->parm = sc->arg_fmt[arg->idx].parm;
|
|
return sc->arg_fmt[arg->idx].scnprintf(bf, size, arg);
|
|
}
|
|
return scnprintf(bf, size, "%ld", val);
|
|
}
|
|
|
|
static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size,
|
|
unsigned char *args, struct trace *trace,
|
|
struct thread *thread)
|
|
{
|
|
size_t printed = 0;
|
|
unsigned long val;
|
|
u8 bit = 1;
|
|
struct syscall_arg arg = {
|
|
.args = args,
|
|
.idx = 0,
|
|
.mask = 0,
|
|
.trace = trace,
|
|
.thread = thread,
|
|
};
|
|
struct thread_trace *ttrace = thread__priv(thread);
|
|
|
|
/*
|
|
* Things like fcntl will set this in its 'cmd' formatter to pick the
|
|
* right formatter for the return value (an fd? file flags?), which is
|
|
* not needed for syscalls that always return a given type, say an fd.
|
|
*/
|
|
ttrace->ret_scnprintf = NULL;
|
|
|
|
if (sc->args != NULL) {
|
|
struct format_field *field;
|
|
|
|
for (field = sc->args; field;
|
|
field = field->next, ++arg.idx, bit <<= 1) {
|
|
if (arg.mask & bit)
|
|
continue;
|
|
|
|
val = syscall_arg__val(&arg, arg.idx);
|
|
|
|
/*
|
|
* Suppress this argument if its value is zero and
|
|
* and we don't have a string associated in an
|
|
* strarray for it.
|
|
*/
|
|
if (val == 0 &&
|
|
!(sc->arg_fmt &&
|
|
(sc->arg_fmt[arg.idx].show_zero ||
|
|
sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAY ||
|
|
sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAYS) &&
|
|
sc->arg_fmt[arg.idx].parm))
|
|
continue;
|
|
|
|
printed += scnprintf(bf + printed, size - printed,
|
|
"%s%s: ", printed ? ", " : "", field->name);
|
|
printed += syscall__scnprintf_val(sc, bf + printed, size - printed, &arg, val);
|
|
}
|
|
} else if (IS_ERR(sc->tp_format)) {
|
|
/*
|
|
* If we managed to read the tracepoint /format file, then we
|
|
* may end up not having any args, like with gettid(), so only
|
|
* print the raw args when we didn't manage to read it.
|
|
*/
|
|
while (arg.idx < sc->nr_args) {
|
|
if (arg.mask & bit)
|
|
goto next_arg;
|
|
val = syscall_arg__val(&arg, arg.idx);
|
|
if (printed)
|
|
printed += scnprintf(bf + printed, size - printed, ", ");
|
|
printed += syscall__scnprintf_name(sc, bf + printed, size - printed, &arg);
|
|
printed += syscall__scnprintf_val(sc, bf + printed, size - printed, &arg, val);
|
|
next_arg:
|
|
++arg.idx;
|
|
bit <<= 1;
|
|
}
|
|
}
|
|
|
|
return printed;
|
|
}
|
|
|
|
typedef int (*tracepoint_handler)(struct trace *trace, struct perf_evsel *evsel,
|
|
union perf_event *event,
|
|
struct perf_sample *sample);
|
|
|
|
static struct syscall *trace__syscall_info(struct trace *trace,
|
|
struct perf_evsel *evsel, int id)
|
|
{
|
|
|
|
if (id < 0) {
|
|
|
|
/*
|
|
* XXX: Noticed on x86_64, reproduced as far back as 3.0.36, haven't tried
|
|
* before that, leaving at a higher verbosity level till that is
|
|
* explained. Reproduced with plain ftrace with:
|
|
*
|
|
* echo 1 > /t/events/raw_syscalls/sys_exit/enable
|
|
* grep "NR -1 " /t/trace_pipe
|
|
*
|
|
* After generating some load on the machine.
|
|
*/
|
|
if (verbose > 1) {
|
|
static u64 n;
|
|
fprintf(trace->output, "Invalid syscall %d id, skipping (%s, %" PRIu64 ") ...\n",
|
|
id, perf_evsel__name(evsel), ++n);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL) &&
|
|
trace__read_syscall_info(trace, id))
|
|
goto out_cant_read;
|
|
|
|
if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL))
|
|
goto out_cant_read;
|
|
|
|
return &trace->syscalls.table[id];
|
|
|
|
out_cant_read:
|
|
if (verbose > 0) {
|
|
fprintf(trace->output, "Problems reading syscall %d", id);
|
|
if (id <= trace->syscalls.max && trace->syscalls.table[id].name != NULL)
|
|
fprintf(trace->output, "(%s)", trace->syscalls.table[id].name);
|
|
fputs(" information\n", trace->output);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static void thread__update_stats(struct thread_trace *ttrace,
|
|
int id, struct perf_sample *sample)
|
|
{
|
|
struct int_node *inode;
|
|
struct stats *stats;
|
|
u64 duration = 0;
|
|
|
|
inode = intlist__findnew(ttrace->syscall_stats, id);
|
|
if (inode == NULL)
|
|
return;
|
|
|
|
stats = inode->priv;
|
|
if (stats == NULL) {
|
|
stats = malloc(sizeof(struct stats));
|
|
if (stats == NULL)
|
|
return;
|
|
init_stats(stats);
|
|
inode->priv = stats;
|
|
}
|
|
|
|
if (ttrace->entry_time && sample->time > ttrace->entry_time)
|
|
duration = sample->time - ttrace->entry_time;
|
|
|
|
update_stats(stats, duration);
|
|
}
|
|
|
|
static int trace__printf_interrupted_entry(struct trace *trace, struct perf_sample *sample)
|
|
{
|
|
struct thread_trace *ttrace;
|
|
u64 duration;
|
|
size_t printed;
|
|
|
|
if (trace->current == NULL)
|
|
return 0;
|
|
|
|
ttrace = thread__priv(trace->current);
|
|
|
|
if (!ttrace->entry_pending)
|
|
return 0;
|
|
|
|
duration = sample->time - ttrace->entry_time;
|
|
|
|
printed = trace__fprintf_entry_head(trace, trace->current, duration, true, ttrace->entry_time, trace->output);
|
|
printed += fprintf(trace->output, "%-70s) ...\n", ttrace->entry_str);
|
|
ttrace->entry_pending = false;
|
|
|
|
return printed;
|
|
}
|
|
|
|
static int trace__sys_enter(struct trace *trace, struct perf_evsel *evsel,
|
|
union perf_event *event __maybe_unused,
|
|
struct perf_sample *sample)
|
|
{
|
|
char *msg;
|
|
void *args;
|
|
size_t printed = 0;
|
|
struct thread *thread;
|
|
int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
|
|
struct syscall *sc = trace__syscall_info(trace, evsel, id);
|
|
struct thread_trace *ttrace;
|
|
|
|
if (sc == NULL)
|
|
return -1;
|
|
|
|
thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
|
|
ttrace = thread__trace(thread, trace->output);
|
|
if (ttrace == NULL)
|
|
goto out_put;
|
|
|
|
args = perf_evsel__sc_tp_ptr(evsel, args, sample);
|
|
|
|
if (ttrace->entry_str == NULL) {
|
|
ttrace->entry_str = malloc(trace__entry_str_size);
|
|
if (!ttrace->entry_str)
|
|
goto out_put;
|
|
}
|
|
|
|
if (!(trace->duration_filter || trace->summary_only || trace->min_stack))
|
|
trace__printf_interrupted_entry(trace, sample);
|
|
|
|
ttrace->entry_time = sample->time;
|
|
msg = ttrace->entry_str;
|
|
printed += scnprintf(msg + printed, trace__entry_str_size - printed, "%s(", sc->name);
|
|
|
|
printed += syscall__scnprintf_args(sc, msg + printed, trace__entry_str_size - printed,
|
|
args, trace, thread);
|
|
|
|
if (sc->is_exit) {
|
|
if (!(trace->duration_filter || trace->summary_only || trace->min_stack)) {
|
|
trace__fprintf_entry_head(trace, thread, 0, false, ttrace->entry_time, trace->output);
|
|
fprintf(trace->output, "%-70s)\n", ttrace->entry_str);
|
|
}
|
|
} else {
|
|
ttrace->entry_pending = true;
|
|
/* See trace__vfs_getname & trace__sys_exit */
|
|
ttrace->filename.pending_open = false;
|
|
}
|
|
|
|
if (trace->current != thread) {
|
|
thread__put(trace->current);
|
|
trace->current = thread__get(thread);
|
|
}
|
|
err = 0;
|
|
out_put:
|
|
thread__put(thread);
|
|
return err;
|
|
}
|
|
|
|
static int trace__resolve_callchain(struct trace *trace, struct perf_evsel *evsel,
|
|
struct perf_sample *sample,
|
|
struct callchain_cursor *cursor)
|
|
{
|
|
struct addr_location al;
|
|
|
|
if (machine__resolve(trace->host, &al, sample) < 0 ||
|
|
thread__resolve_callchain(al.thread, cursor, evsel, sample, NULL, NULL, trace->max_stack))
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sample)
|
|
{
|
|
/* TODO: user-configurable print_opts */
|
|
const unsigned int print_opts = EVSEL__PRINT_SYM |
|
|
EVSEL__PRINT_DSO |
|
|
EVSEL__PRINT_UNKNOWN_AS_ADDR;
|
|
|
|
return sample__fprintf_callchain(sample, 38, print_opts, &callchain_cursor, trace->output);
|
|
}
|
|
|
|
static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel,
|
|
union perf_event *event __maybe_unused,
|
|
struct perf_sample *sample)
|
|
{
|
|
long ret;
|
|
u64 duration = 0;
|
|
bool duration_calculated = false;
|
|
struct thread *thread;
|
|
int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1, callchain_ret = 0;
|
|
struct syscall *sc = trace__syscall_info(trace, evsel, id);
|
|
struct thread_trace *ttrace;
|
|
|
|
if (sc == NULL)
|
|
return -1;
|
|
|
|
thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
|
|
ttrace = thread__trace(thread, trace->output);
|
|
if (ttrace == NULL)
|
|
goto out_put;
|
|
|
|
if (trace->summary)
|
|
thread__update_stats(ttrace, id, sample);
|
|
|
|
ret = perf_evsel__sc_tp_uint(evsel, ret, sample);
|
|
|
|
if (id == trace->open_id && ret >= 0 && ttrace->filename.pending_open) {
|
|
trace__set_fd_pathname(thread, ret, ttrace->filename.name);
|
|
ttrace->filename.pending_open = false;
|
|
++trace->stats.vfs_getname;
|
|
}
|
|
|
|
if (ttrace->entry_time) {
|
|
duration = sample->time - ttrace->entry_time;
|
|
if (trace__filter_duration(trace, duration))
|
|
goto out;
|
|
duration_calculated = true;
|
|
} else if (trace->duration_filter)
|
|
goto out;
|
|
|
|
if (sample->callchain) {
|
|
callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
|
|
if (callchain_ret == 0) {
|
|
if (callchain_cursor.nr < trace->min_stack)
|
|
goto out;
|
|
callchain_ret = 1;
|
|
}
|
|
}
|
|
|
|
if (trace->summary_only)
|
|
goto out;
|
|
|
|
trace__fprintf_entry_head(trace, thread, duration, duration_calculated, ttrace->entry_time, trace->output);
|
|
|
|
if (ttrace->entry_pending) {
|
|
fprintf(trace->output, "%-70s", ttrace->entry_str);
|
|
} else {
|
|
fprintf(trace->output, " ... [");
|
|
color_fprintf(trace->output, PERF_COLOR_YELLOW, "continued");
|
|
fprintf(trace->output, "]: %s()", sc->name);
|
|
}
|
|
|
|
if (sc->fmt == NULL) {
|
|
if (ret < 0)
|
|
goto errno_print;
|
|
signed_print:
|
|
fprintf(trace->output, ") = %ld", ret);
|
|
} else if (ret < 0) {
|
|
errno_print: {
|
|
char bf[STRERR_BUFSIZE];
|
|
const char *emsg = str_error_r(-ret, bf, sizeof(bf)),
|
|
*e = audit_errno_to_name(-ret);
|
|
|
|
fprintf(trace->output, ") = -1 %s %s", e, emsg);
|
|
}
|
|
} else if (ret == 0 && sc->fmt->timeout)
|
|
fprintf(trace->output, ") = 0 Timeout");
|
|
else if (ttrace->ret_scnprintf) {
|
|
char bf[1024];
|
|
struct syscall_arg arg = {
|
|
.val = ret,
|
|
.thread = thread,
|
|
.trace = trace,
|
|
};
|
|
ttrace->ret_scnprintf(bf, sizeof(bf), &arg);
|
|
ttrace->ret_scnprintf = NULL;
|
|
fprintf(trace->output, ") = %s", bf);
|
|
} else if (sc->fmt->hexret)
|
|
fprintf(trace->output, ") = %#lx", ret);
|
|
else if (sc->fmt->errpid) {
|
|
struct thread *child = machine__find_thread(trace->host, ret, ret);
|
|
|
|
if (child != NULL) {
|
|
fprintf(trace->output, ") = %ld", ret);
|
|
if (child->comm_set)
|
|
fprintf(trace->output, " (%s)", thread__comm_str(child));
|
|
thread__put(child);
|
|
}
|
|
} else
|
|
goto signed_print;
|
|
|
|
fputc('\n', trace->output);
|
|
|
|
if (callchain_ret > 0)
|
|
trace__fprintf_callchain(trace, sample);
|
|
else if (callchain_ret < 0)
|
|
pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel));
|
|
out:
|
|
ttrace->entry_pending = false;
|
|
err = 0;
|
|
out_put:
|
|
thread__put(thread);
|
|
return err;
|
|
}
|
|
|
|
static int trace__vfs_getname(struct trace *trace, struct perf_evsel *evsel,
|
|
union perf_event *event __maybe_unused,
|
|
struct perf_sample *sample)
|
|
{
|
|
struct thread *thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
|
|
struct thread_trace *ttrace;
|
|
size_t filename_len, entry_str_len, to_move;
|
|
ssize_t remaining_space;
|
|
char *pos;
|
|
const char *filename = perf_evsel__rawptr(evsel, sample, "pathname");
|
|
|
|
if (!thread)
|
|
goto out;
|
|
|
|
ttrace = thread__priv(thread);
|
|
if (!ttrace)
|
|
goto out_put;
|
|
|
|
filename_len = strlen(filename);
|
|
if (filename_len == 0)
|
|
goto out_put;
|
|
|
|
if (ttrace->filename.namelen < filename_len) {
|
|
char *f = realloc(ttrace->filename.name, filename_len + 1);
|
|
|
|
if (f == NULL)
|
|
goto out_put;
|
|
|
|
ttrace->filename.namelen = filename_len;
|
|
ttrace->filename.name = f;
|
|
}
|
|
|
|
strcpy(ttrace->filename.name, filename);
|
|
ttrace->filename.pending_open = true;
|
|
|
|
if (!ttrace->filename.ptr)
|
|
goto out_put;
|
|
|
|
entry_str_len = strlen(ttrace->entry_str);
|
|
remaining_space = trace__entry_str_size - entry_str_len - 1; /* \0 */
|
|
if (remaining_space <= 0)
|
|
goto out_put;
|
|
|
|
if (filename_len > (size_t)remaining_space) {
|
|
filename += filename_len - remaining_space;
|
|
filename_len = remaining_space;
|
|
}
|
|
|
|
to_move = entry_str_len - ttrace->filename.entry_str_pos + 1; /* \0 */
|
|
pos = ttrace->entry_str + ttrace->filename.entry_str_pos;
|
|
memmove(pos + filename_len, pos, to_move);
|
|
memcpy(pos, filename, filename_len);
|
|
|
|
ttrace->filename.ptr = 0;
|
|
ttrace->filename.entry_str_pos = 0;
|
|
out_put:
|
|
thread__put(thread);
|
|
out:
|
|
return 0;
|
|
}
|
|
|
|
static int trace__sched_stat_runtime(struct trace *trace, struct perf_evsel *evsel,
|
|
union perf_event *event __maybe_unused,
|
|
struct perf_sample *sample)
|
|
{
|
|
u64 runtime = perf_evsel__intval(evsel, sample, "runtime");
|
|
double runtime_ms = (double)runtime / NSEC_PER_MSEC;
|
|
struct thread *thread = machine__findnew_thread(trace->host,
|
|
sample->pid,
|
|
sample->tid);
|
|
struct thread_trace *ttrace = thread__trace(thread, trace->output);
|
|
|
|
if (ttrace == NULL)
|
|
goto out_dump;
|
|
|
|
ttrace->runtime_ms += runtime_ms;
|
|
trace->runtime_ms += runtime_ms;
|
|
out_put:
|
|
thread__put(thread);
|
|
return 0;
|
|
|
|
out_dump:
|
|
fprintf(trace->output, "%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n",
|
|
evsel->name,
|
|
perf_evsel__strval(evsel, sample, "comm"),
|
|
(pid_t)perf_evsel__intval(evsel, sample, "pid"),
|
|
runtime,
|
|
perf_evsel__intval(evsel, sample, "vruntime"));
|
|
goto out_put;
|
|
}
|
|
|
|
static int bpf_output__printer(enum binary_printer_ops op,
|
|
unsigned int val, void *extra __maybe_unused, FILE *fp)
|
|
{
|
|
unsigned char ch = (unsigned char)val;
|
|
|
|
switch (op) {
|
|
case BINARY_PRINT_CHAR_DATA:
|
|
return fprintf(fp, "%c", isprint(ch) ? ch : '.');
|
|
case BINARY_PRINT_DATA_BEGIN:
|
|
case BINARY_PRINT_LINE_BEGIN:
|
|
case BINARY_PRINT_ADDR:
|
|
case BINARY_PRINT_NUM_DATA:
|
|
case BINARY_PRINT_NUM_PAD:
|
|
case BINARY_PRINT_SEP:
|
|
case BINARY_PRINT_CHAR_PAD:
|
|
case BINARY_PRINT_LINE_END:
|
|
case BINARY_PRINT_DATA_END:
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void bpf_output__fprintf(struct trace *trace,
|
|
struct perf_sample *sample)
|
|
{
|
|
binary__fprintf(sample->raw_data, sample->raw_size, 8,
|
|
bpf_output__printer, NULL, trace->output);
|
|
}
|
|
|
|
static int trace__event_handler(struct trace *trace, struct perf_evsel *evsel,
|
|
union perf_event *event __maybe_unused,
|
|
struct perf_sample *sample)
|
|
{
|
|
int callchain_ret = 0;
|
|
|
|
if (sample->callchain) {
|
|
callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
|
|
if (callchain_ret == 0) {
|
|
if (callchain_cursor.nr < trace->min_stack)
|
|
goto out;
|
|
callchain_ret = 1;
|
|
}
|
|
}
|
|
|
|
trace__printf_interrupted_entry(trace, sample);
|
|
trace__fprintf_tstamp(trace, sample->time, trace->output);
|
|
|
|
if (trace->trace_syscalls)
|
|
fprintf(trace->output, "( ): ");
|
|
|
|
fprintf(trace->output, "%s:", evsel->name);
|
|
|
|
if (perf_evsel__is_bpf_output(evsel)) {
|
|
bpf_output__fprintf(trace, sample);
|
|
} else if (evsel->tp_format) {
|
|
event_format__fprintf(evsel->tp_format, sample->cpu,
|
|
sample->raw_data, sample->raw_size,
|
|
trace->output);
|
|
}
|
|
|
|
fprintf(trace->output, ")\n");
|
|
|
|
if (callchain_ret > 0)
|
|
trace__fprintf_callchain(trace, sample);
|
|
else if (callchain_ret < 0)
|
|
pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel));
|
|
out:
|
|
return 0;
|
|
}
|
|
|
|
static void print_location(FILE *f, struct perf_sample *sample,
|
|
struct addr_location *al,
|
|
bool print_dso, bool print_sym)
|
|
{
|
|
|
|
if ((verbose > 0 || print_dso) && al->map)
|
|
fprintf(f, "%s@", al->map->dso->long_name);
|
|
|
|
if ((verbose > 0 || print_sym) && al->sym)
|
|
fprintf(f, "%s+0x%" PRIx64, al->sym->name,
|
|
al->addr - al->sym->start);
|
|
else if (al->map)
|
|
fprintf(f, "0x%" PRIx64, al->addr);
|
|
else
|
|
fprintf(f, "0x%" PRIx64, sample->addr);
|
|
}
|
|
|
|
static int trace__pgfault(struct trace *trace,
|
|
struct perf_evsel *evsel,
|
|
union perf_event *event __maybe_unused,
|
|
struct perf_sample *sample)
|
|
{
|
|
struct thread *thread;
|
|
struct addr_location al;
|
|
char map_type = 'd';
|
|
struct thread_trace *ttrace;
|
|
int err = -1;
|
|
int callchain_ret = 0;
|
|
|
|
thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
|
|
|
|
if (sample->callchain) {
|
|
callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
|
|
if (callchain_ret == 0) {
|
|
if (callchain_cursor.nr < trace->min_stack)
|
|
goto out_put;
|
|
callchain_ret = 1;
|
|
}
|
|
}
|
|
|
|
ttrace = thread__trace(thread, trace->output);
|
|
if (ttrace == NULL)
|
|
goto out_put;
|
|
|
|
if (evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)
|
|
ttrace->pfmaj++;
|
|
else
|
|
ttrace->pfmin++;
|
|
|
|
if (trace->summary_only)
|
|
goto out;
|
|
|
|
thread__find_addr_location(thread, sample->cpumode, MAP__FUNCTION,
|
|
sample->ip, &al);
|
|
|
|
trace__fprintf_entry_head(trace, thread, 0, true, sample->time, trace->output);
|
|
|
|
fprintf(trace->output, "%sfault [",
|
|
evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ?
|
|
"maj" : "min");
|
|
|
|
print_location(trace->output, sample, &al, false, true);
|
|
|
|
fprintf(trace->output, "] => ");
|
|
|
|
thread__find_addr_location(thread, sample->cpumode, MAP__VARIABLE,
|
|
sample->addr, &al);
|
|
|
|
if (!al.map) {
|
|
thread__find_addr_location(thread, sample->cpumode,
|
|
MAP__FUNCTION, sample->addr, &al);
|
|
|
|
if (al.map)
|
|
map_type = 'x';
|
|
else
|
|
map_type = '?';
|
|
}
|
|
|
|
print_location(trace->output, sample, &al, true, false);
|
|
|
|
fprintf(trace->output, " (%c%c)\n", map_type, al.level);
|
|
|
|
if (callchain_ret > 0)
|
|
trace__fprintf_callchain(trace, sample);
|
|
else if (callchain_ret < 0)
|
|
pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel));
|
|
out:
|
|
err = 0;
|
|
out_put:
|
|
thread__put(thread);
|
|
return err;
|
|
}
|
|
|
|
static void trace__set_base_time(struct trace *trace,
|
|
struct perf_evsel *evsel,
|
|
struct perf_sample *sample)
|
|
{
|
|
/*
|
|
* BPF events were not setting PERF_SAMPLE_TIME, so be more robust
|
|
* and don't use sample->time unconditionally, we may end up having
|
|
* some other event in the future without PERF_SAMPLE_TIME for good
|
|
* reason, i.e. we may not be interested in its timestamps, just in
|
|
* it taking place, picking some piece of information when it
|
|
* appears in our event stream (vfs_getname comes to mind).
|
|
*/
|
|
if (trace->base_time == 0 && !trace->full_time &&
|
|
(evsel->attr.sample_type & PERF_SAMPLE_TIME))
|
|
trace->base_time = sample->time;
|
|
}
|
|
|
|
static int trace__process_sample(struct perf_tool *tool,
|
|
union perf_event *event,
|
|
struct perf_sample *sample,
|
|
struct perf_evsel *evsel,
|
|
struct machine *machine __maybe_unused)
|
|
{
|
|
struct trace *trace = container_of(tool, struct trace, tool);
|
|
struct thread *thread;
|
|
int err = 0;
|
|
|
|
tracepoint_handler handler = evsel->handler;
|
|
|
|
thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
|
|
if (thread && thread__is_filtered(thread))
|
|
goto out;
|
|
|
|
trace__set_base_time(trace, evsel, sample);
|
|
|
|
if (handler) {
|
|
++trace->nr_events;
|
|
handler(trace, evsel, event, sample);
|
|
}
|
|
out:
|
|
thread__put(thread);
|
|
return err;
|
|
}
|
|
|
|
static int trace__record(struct trace *trace, int argc, const char **argv)
|
|
{
|
|
unsigned int rec_argc, i, j;
|
|
const char **rec_argv;
|
|
const char * const record_args[] = {
|
|
"record",
|
|
"-R",
|
|
"-m", "1024",
|
|
"-c", "1",
|
|
};
|
|
|
|
const char * const sc_args[] = { "-e", };
|
|
unsigned int sc_args_nr = ARRAY_SIZE(sc_args);
|
|
const char * const majpf_args[] = { "-e", "major-faults" };
|
|
unsigned int majpf_args_nr = ARRAY_SIZE(majpf_args);
|
|
const char * const minpf_args[] = { "-e", "minor-faults" };
|
|
unsigned int minpf_args_nr = ARRAY_SIZE(minpf_args);
|
|
|
|
/* +1 is for the event string below */
|
|
rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 1 +
|
|
majpf_args_nr + minpf_args_nr + argc;
|
|
rec_argv = calloc(rec_argc + 1, sizeof(char *));
|
|
|
|
if (rec_argv == NULL)
|
|
return -ENOMEM;
|
|
|
|
j = 0;
|
|
for (i = 0; i < ARRAY_SIZE(record_args); i++)
|
|
rec_argv[j++] = record_args[i];
|
|
|
|
if (trace->trace_syscalls) {
|
|
for (i = 0; i < sc_args_nr; i++)
|
|
rec_argv[j++] = sc_args[i];
|
|
|
|
/* event string may be different for older kernels - e.g., RHEL6 */
|
|
if (is_valid_tracepoint("raw_syscalls:sys_enter"))
|
|
rec_argv[j++] = "raw_syscalls:sys_enter,raw_syscalls:sys_exit";
|
|
else if (is_valid_tracepoint("syscalls:sys_enter"))
|
|
rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit";
|
|
else {
|
|
pr_err("Neither raw_syscalls nor syscalls events exist.\n");
|
|
free(rec_argv);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
if (trace->trace_pgfaults & TRACE_PFMAJ)
|
|
for (i = 0; i < majpf_args_nr; i++)
|
|
rec_argv[j++] = majpf_args[i];
|
|
|
|
if (trace->trace_pgfaults & TRACE_PFMIN)
|
|
for (i = 0; i < minpf_args_nr; i++)
|
|
rec_argv[j++] = minpf_args[i];
|
|
|
|
for (i = 0; i < (unsigned int)argc; i++)
|
|
rec_argv[j++] = argv[i];
|
|
|
|
return cmd_record(j, rec_argv);
|
|
}
|
|
|
|
static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp);
|
|
|
|
static bool perf_evlist__add_vfs_getname(struct perf_evlist *evlist)
|
|
{
|
|
struct perf_evsel *evsel = perf_evsel__newtp("probe", "vfs_getname");
|
|
|
|
if (IS_ERR(evsel))
|
|
return false;
|
|
|
|
if (perf_evsel__field(evsel, "pathname") == NULL) {
|
|
perf_evsel__delete(evsel);
|
|
return false;
|
|
}
|
|
|
|
evsel->handler = trace__vfs_getname;
|
|
perf_evlist__add(evlist, evsel);
|
|
return true;
|
|
}
|
|
|
|
static struct perf_evsel *perf_evsel__new_pgfault(u64 config)
|
|
{
|
|
struct perf_evsel *evsel;
|
|
struct perf_event_attr attr = {
|
|
.type = PERF_TYPE_SOFTWARE,
|
|
.mmap_data = 1,
|
|
};
|
|
|
|
attr.config = config;
|
|
attr.sample_period = 1;
|
|
|
|
event_attr_init(&attr);
|
|
|
|
evsel = perf_evsel__new(&attr);
|
|
if (evsel)
|
|
evsel->handler = trace__pgfault;
|
|
|
|
return evsel;
|
|
}
|
|
|
|
static void trace__handle_event(struct trace *trace, union perf_event *event, struct perf_sample *sample)
|
|
{
|
|
const u32 type = event->header.type;
|
|
struct perf_evsel *evsel;
|
|
|
|
if (type != PERF_RECORD_SAMPLE) {
|
|
trace__process_event(trace, trace->host, event, sample);
|
|
return;
|
|
}
|
|
|
|
evsel = perf_evlist__id2evsel(trace->evlist, sample->id);
|
|
if (evsel == NULL) {
|
|
fprintf(trace->output, "Unknown tp ID %" PRIu64 ", skipping...\n", sample->id);
|
|
return;
|
|
}
|
|
|
|
trace__set_base_time(trace, evsel, sample);
|
|
|
|
if (evsel->attr.type == PERF_TYPE_TRACEPOINT &&
|
|
sample->raw_data == NULL) {
|
|
fprintf(trace->output, "%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n",
|
|
perf_evsel__name(evsel), sample->tid,
|
|
sample->cpu, sample->raw_size);
|
|
} else {
|
|
tracepoint_handler handler = evsel->handler;
|
|
handler(trace, evsel, event, sample);
|
|
}
|
|
}
|
|
|
|
static int trace__add_syscall_newtp(struct trace *trace)
|
|
{
|
|
int ret = -1;
|
|
struct perf_evlist *evlist = trace->evlist;
|
|
struct perf_evsel *sys_enter, *sys_exit;
|
|
|
|
sys_enter = perf_evsel__syscall_newtp("sys_enter", trace__sys_enter);
|
|
if (sys_enter == NULL)
|
|
goto out;
|
|
|
|
if (perf_evsel__init_sc_tp_ptr_field(sys_enter, args))
|
|
goto out_delete_sys_enter;
|
|
|
|
sys_exit = perf_evsel__syscall_newtp("sys_exit", trace__sys_exit);
|
|
if (sys_exit == NULL)
|
|
goto out_delete_sys_enter;
|
|
|
|
if (perf_evsel__init_sc_tp_uint_field(sys_exit, ret))
|
|
goto out_delete_sys_exit;
|
|
|
|
perf_evlist__add(evlist, sys_enter);
|
|
perf_evlist__add(evlist, sys_exit);
|
|
|
|
if (callchain_param.enabled && !trace->kernel_syscallchains) {
|
|
/*
|
|
* We're interested only in the user space callchain
|
|
* leading to the syscall, allow overriding that for
|
|
* debugging reasons using --kernel_syscall_callchains
|
|
*/
|
|
sys_exit->attr.exclude_callchain_kernel = 1;
|
|
}
|
|
|
|
trace->syscalls.events.sys_enter = sys_enter;
|
|
trace->syscalls.events.sys_exit = sys_exit;
|
|
|
|
ret = 0;
|
|
out:
|
|
return ret;
|
|
|
|
out_delete_sys_exit:
|
|
perf_evsel__delete_priv(sys_exit);
|
|
out_delete_sys_enter:
|
|
perf_evsel__delete_priv(sys_enter);
|
|
goto out;
|
|
}
|
|
|
|
static int trace__set_ev_qualifier_filter(struct trace *trace)
|
|
{
|
|
int err = -1;
|
|
struct perf_evsel *sys_exit;
|
|
char *filter = asprintf_expr_inout_ints("id", !trace->not_ev_qualifier,
|
|
trace->ev_qualifier_ids.nr,
|
|
trace->ev_qualifier_ids.entries);
|
|
|
|
if (filter == NULL)
|
|
goto out_enomem;
|
|
|
|
if (!perf_evsel__append_tp_filter(trace->syscalls.events.sys_enter,
|
|
filter)) {
|
|
sys_exit = trace->syscalls.events.sys_exit;
|
|
err = perf_evsel__append_tp_filter(sys_exit, filter);
|
|
}
|
|
|
|
free(filter);
|
|
out:
|
|
return err;
|
|
out_enomem:
|
|
errno = ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
static int trace__set_filter_loop_pids(struct trace *trace)
|
|
{
|
|
unsigned int nr = 1;
|
|
pid_t pids[32] = {
|
|
getpid(),
|
|
};
|
|
struct thread *thread = machine__find_thread(trace->host, pids[0], pids[0]);
|
|
|
|
while (thread && nr < ARRAY_SIZE(pids)) {
|
|
struct thread *parent = machine__find_thread(trace->host, thread->ppid, thread->ppid);
|
|
|
|
if (parent == NULL)
|
|
break;
|
|
|
|
if (!strcmp(thread__comm_str(parent), "sshd")) {
|
|
pids[nr++] = parent->tid;
|
|
break;
|
|
}
|
|
thread = parent;
|
|
}
|
|
|
|
return perf_evlist__set_filter_pids(trace->evlist, nr, pids);
|
|
}
|
|
|
|
static int trace__run(struct trace *trace, int argc, const char **argv)
|
|
{
|
|
struct perf_evlist *evlist = trace->evlist;
|
|
struct perf_evsel *evsel, *pgfault_maj = NULL, *pgfault_min = NULL;
|
|
int err = -1, i;
|
|
unsigned long before;
|
|
const bool forks = argc > 0;
|
|
bool draining = false;
|
|
|
|
trace->live = true;
|
|
|
|
if (trace->trace_syscalls && trace__add_syscall_newtp(trace))
|
|
goto out_error_raw_syscalls;
|
|
|
|
if (trace->trace_syscalls)
|
|
trace->vfs_getname = perf_evlist__add_vfs_getname(evlist);
|
|
|
|
if ((trace->trace_pgfaults & TRACE_PFMAJ)) {
|
|
pgfault_maj = perf_evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MAJ);
|
|
if (pgfault_maj == NULL)
|
|
goto out_error_mem;
|
|
perf_evlist__add(evlist, pgfault_maj);
|
|
}
|
|
|
|
if ((trace->trace_pgfaults & TRACE_PFMIN)) {
|
|
pgfault_min = perf_evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MIN);
|
|
if (pgfault_min == NULL)
|
|
goto out_error_mem;
|
|
perf_evlist__add(evlist, pgfault_min);
|
|
}
|
|
|
|
if (trace->sched &&
|
|
perf_evlist__add_newtp(evlist, "sched", "sched_stat_runtime",
|
|
trace__sched_stat_runtime))
|
|
goto out_error_sched_stat_runtime;
|
|
|
|
err = perf_evlist__create_maps(evlist, &trace->opts.target);
|
|
if (err < 0) {
|
|
fprintf(trace->output, "Problems parsing the target to trace, check your options!\n");
|
|
goto out_delete_evlist;
|
|
}
|
|
|
|
err = trace__symbols_init(trace, evlist);
|
|
if (err < 0) {
|
|
fprintf(trace->output, "Problems initializing symbol libraries!\n");
|
|
goto out_delete_evlist;
|
|
}
|
|
|
|
perf_evlist__config(evlist, &trace->opts, NULL);
|
|
|
|
if (callchain_param.enabled) {
|
|
bool use_identifier = false;
|
|
|
|
if (trace->syscalls.events.sys_exit) {
|
|
perf_evsel__config_callchain(trace->syscalls.events.sys_exit,
|
|
&trace->opts, &callchain_param);
|
|
use_identifier = true;
|
|
}
|
|
|
|
if (pgfault_maj) {
|
|
perf_evsel__config_callchain(pgfault_maj, &trace->opts, &callchain_param);
|
|
use_identifier = true;
|
|
}
|
|
|
|
if (pgfault_min) {
|
|
perf_evsel__config_callchain(pgfault_min, &trace->opts, &callchain_param);
|
|
use_identifier = true;
|
|
}
|
|
|
|
if (use_identifier) {
|
|
/*
|
|
* Now we have evsels with different sample_ids, use
|
|
* PERF_SAMPLE_IDENTIFIER to map from sample to evsel
|
|
* from a fixed position in each ring buffer record.
|
|
*
|
|
* As of this the changeset introducing this comment, this
|
|
* isn't strictly needed, as the fields that can come before
|
|
* PERF_SAMPLE_ID are all used, but we'll probably disable
|
|
* some of those for things like copying the payload of
|
|
* pointer syscall arguments, and for vfs_getname we don't
|
|
* need PERF_SAMPLE_ADDR and PERF_SAMPLE_IP, so do this
|
|
* here as a warning we need to use PERF_SAMPLE_IDENTIFIER.
|
|
*/
|
|
perf_evlist__set_sample_bit(evlist, IDENTIFIER);
|
|
perf_evlist__reset_sample_bit(evlist, ID);
|
|
}
|
|
}
|
|
|
|
signal(SIGCHLD, sig_handler);
|
|
signal(SIGINT, sig_handler);
|
|
|
|
if (forks) {
|
|
err = perf_evlist__prepare_workload(evlist, &trace->opts.target,
|
|
argv, false, NULL);
|
|
if (err < 0) {
|
|
fprintf(trace->output, "Couldn't run the workload!\n");
|
|
goto out_delete_evlist;
|
|
}
|
|
}
|
|
|
|
err = perf_evlist__open(evlist);
|
|
if (err < 0)
|
|
goto out_error_open;
|
|
|
|
err = bpf__apply_obj_config();
|
|
if (err) {
|
|
char errbuf[BUFSIZ];
|
|
|
|
bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf));
|
|
pr_err("ERROR: Apply config to BPF failed: %s\n",
|
|
errbuf);
|
|
goto out_error_open;
|
|
}
|
|
|
|
/*
|
|
* Better not use !target__has_task() here because we need to cover the
|
|
* case where no threads were specified in the command line, but a
|
|
* workload was, and in that case we will fill in the thread_map when
|
|
* we fork the workload in perf_evlist__prepare_workload.
|
|
*/
|
|
if (trace->filter_pids.nr > 0)
|
|
err = perf_evlist__set_filter_pids(evlist, trace->filter_pids.nr, trace->filter_pids.entries);
|
|
else if (thread_map__pid(evlist->threads, 0) == -1)
|
|
err = trace__set_filter_loop_pids(trace);
|
|
|
|
if (err < 0)
|
|
goto out_error_mem;
|
|
|
|
if (trace->ev_qualifier_ids.nr > 0) {
|
|
err = trace__set_ev_qualifier_filter(trace);
|
|
if (err < 0)
|
|
goto out_errno;
|
|
|
|
pr_debug("event qualifier tracepoint filter: %s\n",
|
|
trace->syscalls.events.sys_exit->filter);
|
|
}
|
|
|
|
err = perf_evlist__apply_filters(evlist, &evsel);
|
|
if (err < 0)
|
|
goto out_error_apply_filters;
|
|
|
|
err = perf_evlist__mmap(evlist, trace->opts.mmap_pages, false);
|
|
if (err < 0)
|
|
goto out_error_mmap;
|
|
|
|
if (!target__none(&trace->opts.target) && !trace->opts.initial_delay)
|
|
perf_evlist__enable(evlist);
|
|
|
|
if (forks)
|
|
perf_evlist__start_workload(evlist);
|
|
|
|
if (trace->opts.initial_delay) {
|
|
usleep(trace->opts.initial_delay * 1000);
|
|
perf_evlist__enable(evlist);
|
|
}
|
|
|
|
trace->multiple_threads = thread_map__pid(evlist->threads, 0) == -1 ||
|
|
evlist->threads->nr > 1 ||
|
|
perf_evlist__first(evlist)->attr.inherit;
|
|
again:
|
|
before = trace->nr_events;
|
|
|
|
for (i = 0; i < evlist->nr_mmaps; i++) {
|
|
union perf_event *event;
|
|
|
|
while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
|
|
struct perf_sample sample;
|
|
|
|
++trace->nr_events;
|
|
|
|
err = perf_evlist__parse_sample(evlist, event, &sample);
|
|
if (err) {
|
|
fprintf(trace->output, "Can't parse sample, err = %d, skipping...\n", err);
|
|
goto next_event;
|
|
}
|
|
|
|
trace__handle_event(trace, event, &sample);
|
|
next_event:
|
|
perf_evlist__mmap_consume(evlist, i);
|
|
|
|
if (interrupted)
|
|
goto out_disable;
|
|
|
|
if (done && !draining) {
|
|
perf_evlist__disable(evlist);
|
|
draining = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (trace->nr_events == before) {
|
|
int timeout = done ? 100 : -1;
|
|
|
|
if (!draining && perf_evlist__poll(evlist, timeout) > 0) {
|
|
if (perf_evlist__filter_pollfd(evlist, POLLERR | POLLHUP) == 0)
|
|
draining = true;
|
|
|
|
goto again;
|
|
}
|
|
} else {
|
|
goto again;
|
|
}
|
|
|
|
out_disable:
|
|
thread__zput(trace->current);
|
|
|
|
perf_evlist__disable(evlist);
|
|
|
|
if (!err) {
|
|
if (trace->summary)
|
|
trace__fprintf_thread_summary(trace, trace->output);
|
|
|
|
if (trace->show_tool_stats) {
|
|
fprintf(trace->output, "Stats:\n "
|
|
" vfs_getname : %" PRIu64 "\n"
|
|
" proc_getname: %" PRIu64 "\n",
|
|
trace->stats.vfs_getname,
|
|
trace->stats.proc_getname);
|
|
}
|
|
}
|
|
|
|
out_delete_evlist:
|
|
trace__symbols__exit(trace);
|
|
|
|
perf_evlist__delete(evlist);
|
|
trace->evlist = NULL;
|
|
trace->live = false;
|
|
return err;
|
|
{
|
|
char errbuf[BUFSIZ];
|
|
|
|
out_error_sched_stat_runtime:
|
|
tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "sched", "sched_stat_runtime");
|
|
goto out_error;
|
|
|
|
out_error_raw_syscalls:
|
|
tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "raw_syscalls", "sys_(enter|exit)");
|
|
goto out_error;
|
|
|
|
out_error_mmap:
|
|
perf_evlist__strerror_mmap(evlist, errno, errbuf, sizeof(errbuf));
|
|
goto out_error;
|
|
|
|
out_error_open:
|
|
perf_evlist__strerror_open(evlist, errno, errbuf, sizeof(errbuf));
|
|
|
|
out_error:
|
|
fprintf(trace->output, "%s\n", errbuf);
|
|
goto out_delete_evlist;
|
|
|
|
out_error_apply_filters:
|
|
fprintf(trace->output,
|
|
"Failed to set filter \"%s\" on event %s with %d (%s)\n",
|
|
evsel->filter, perf_evsel__name(evsel), errno,
|
|
str_error_r(errno, errbuf, sizeof(errbuf)));
|
|
goto out_delete_evlist;
|
|
}
|
|
out_error_mem:
|
|
fprintf(trace->output, "Not enough memory to run!\n");
|
|
goto out_delete_evlist;
|
|
|
|
out_errno:
|
|
fprintf(trace->output, "errno=%d,%s\n", errno, strerror(errno));
|
|
goto out_delete_evlist;
|
|
}
|
|
|
|
static int trace__replay(struct trace *trace)
|
|
{
|
|
const struct perf_evsel_str_handler handlers[] = {
|
|
{ "probe:vfs_getname", trace__vfs_getname, },
|
|
};
|
|
struct perf_data data = {
|
|
.file = {
|
|
.path = input_name,
|
|
},
|
|
.mode = PERF_DATA_MODE_READ,
|
|
.force = trace->force,
|
|
};
|
|
struct perf_session *session;
|
|
struct perf_evsel *evsel;
|
|
int err = -1;
|
|
|
|
trace->tool.sample = trace__process_sample;
|
|
trace->tool.mmap = perf_event__process_mmap;
|
|
trace->tool.mmap2 = perf_event__process_mmap2;
|
|
trace->tool.comm = perf_event__process_comm;
|
|
trace->tool.exit = perf_event__process_exit;
|
|
trace->tool.fork = perf_event__process_fork;
|
|
trace->tool.attr = perf_event__process_attr;
|
|
trace->tool.tracing_data = perf_event__process_tracing_data;
|
|
trace->tool.build_id = perf_event__process_build_id;
|
|
trace->tool.namespaces = perf_event__process_namespaces;
|
|
|
|
trace->tool.ordered_events = true;
|
|
trace->tool.ordering_requires_timestamps = true;
|
|
|
|
/* add tid to output */
|
|
trace->multiple_threads = true;
|
|
|
|
session = perf_session__new(&data, false, &trace->tool);
|
|
if (session == NULL)
|
|
return -1;
|
|
|
|
if (trace->opts.target.pid)
|
|
symbol_conf.pid_list_str = strdup(trace->opts.target.pid);
|
|
|
|
if (trace->opts.target.tid)
|
|
symbol_conf.tid_list_str = strdup(trace->opts.target.tid);
|
|
|
|
if (symbol__init(&session->header.env) < 0)
|
|
goto out;
|
|
|
|
trace->host = &session->machines.host;
|
|
|
|
err = perf_session__set_tracepoints_handlers(session, handlers);
|
|
if (err)
|
|
goto out;
|
|
|
|
evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
|
|
"raw_syscalls:sys_enter");
|
|
/* older kernels have syscalls tp versus raw_syscalls */
|
|
if (evsel == NULL)
|
|
evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
|
|
"syscalls:sys_enter");
|
|
|
|
if (evsel &&
|
|
(perf_evsel__init_syscall_tp(evsel, trace__sys_enter) < 0 ||
|
|
perf_evsel__init_sc_tp_ptr_field(evsel, args))) {
|
|
pr_err("Error during initialize raw_syscalls:sys_enter event\n");
|
|
goto out;
|
|
}
|
|
|
|
evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
|
|
"raw_syscalls:sys_exit");
|
|
if (evsel == NULL)
|
|
evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
|
|
"syscalls:sys_exit");
|
|
if (evsel &&
|
|
(perf_evsel__init_syscall_tp(evsel, trace__sys_exit) < 0 ||
|
|
perf_evsel__init_sc_tp_uint_field(evsel, ret))) {
|
|
pr_err("Error during initialize raw_syscalls:sys_exit event\n");
|
|
goto out;
|
|
}
|
|
|
|
evlist__for_each_entry(session->evlist, evsel) {
|
|
if (evsel->attr.type == PERF_TYPE_SOFTWARE &&
|
|
(evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ||
|
|
evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
|
|
evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS))
|
|
evsel->handler = trace__pgfault;
|
|
}
|
|
|
|
setup_pager();
|
|
|
|
err = perf_session__process_events(session);
|
|
if (err)
|
|
pr_err("Failed to process events, error %d", err);
|
|
|
|
else if (trace->summary)
|
|
trace__fprintf_thread_summary(trace, trace->output);
|
|
|
|
out:
|
|
perf_session__delete(session);
|
|
|
|
return err;
|
|
}
|
|
|
|
static size_t trace__fprintf_threads_header(FILE *fp)
|
|
{
|
|
size_t printed;
|
|
|
|
printed = fprintf(fp, "\n Summary of events:\n\n");
|
|
|
|
return printed;
|
|
}
|
|
|
|
DEFINE_RESORT_RB(syscall_stats, a->msecs > b->msecs,
|
|
struct stats *stats;
|
|
double msecs;
|
|
int syscall;
|
|
)
|
|
{
|
|
struct int_node *source = rb_entry(nd, struct int_node, rb_node);
|
|
struct stats *stats = source->priv;
|
|
|
|
entry->syscall = source->i;
|
|
entry->stats = stats;
|
|
entry->msecs = stats ? (u64)stats->n * (avg_stats(stats) / NSEC_PER_MSEC) : 0;
|
|
}
|
|
|
|
static size_t thread__dump_stats(struct thread_trace *ttrace,
|
|
struct trace *trace, FILE *fp)
|
|
{
|
|
size_t printed = 0;
|
|
struct syscall *sc;
|
|
struct rb_node *nd;
|
|
DECLARE_RESORT_RB_INTLIST(syscall_stats, ttrace->syscall_stats);
|
|
|
|
if (syscall_stats == NULL)
|
|
return 0;
|
|
|
|
printed += fprintf(fp, "\n");
|
|
|
|
printed += fprintf(fp, " syscall calls total min avg max stddev\n");
|
|
printed += fprintf(fp, " (msec) (msec) (msec) (msec) (%%)\n");
|
|
printed += fprintf(fp, " --------------- -------- --------- --------- --------- --------- ------\n");
|
|
|
|
resort_rb__for_each_entry(nd, syscall_stats) {
|
|
struct stats *stats = syscall_stats_entry->stats;
|
|
if (stats) {
|
|
double min = (double)(stats->min) / NSEC_PER_MSEC;
|
|
double max = (double)(stats->max) / NSEC_PER_MSEC;
|
|
double avg = avg_stats(stats);
|
|
double pct;
|
|
u64 n = (u64) stats->n;
|
|
|
|
pct = avg ? 100.0 * stddev_stats(stats)/avg : 0.0;
|
|
avg /= NSEC_PER_MSEC;
|
|
|
|
sc = &trace->syscalls.table[syscall_stats_entry->syscall];
|
|
printed += fprintf(fp, " %-15s", sc->name);
|
|
printed += fprintf(fp, " %8" PRIu64 " %9.3f %9.3f %9.3f",
|
|
n, syscall_stats_entry->msecs, min, avg);
|
|
printed += fprintf(fp, " %9.3f %9.2f%%\n", max, pct);
|
|
}
|
|
}
|
|
|
|
resort_rb__delete(syscall_stats);
|
|
printed += fprintf(fp, "\n\n");
|
|
|
|
return printed;
|
|
}
|
|
|
|
static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trace *trace)
|
|
{
|
|
size_t printed = 0;
|
|
struct thread_trace *ttrace = thread__priv(thread);
|
|
double ratio;
|
|
|
|
if (ttrace == NULL)
|
|
return 0;
|
|
|
|
ratio = (double)ttrace->nr_events / trace->nr_events * 100.0;
|
|
|
|
printed += fprintf(fp, " %s (%d), ", thread__comm_str(thread), thread->tid);
|
|
printed += fprintf(fp, "%lu events, ", ttrace->nr_events);
|
|
printed += fprintf(fp, "%.1f%%", ratio);
|
|
if (ttrace->pfmaj)
|
|
printed += fprintf(fp, ", %lu majfaults", ttrace->pfmaj);
|
|
if (ttrace->pfmin)
|
|
printed += fprintf(fp, ", %lu minfaults", ttrace->pfmin);
|
|
if (trace->sched)
|
|
printed += fprintf(fp, ", %.3f msec\n", ttrace->runtime_ms);
|
|
else if (fputc('\n', fp) != EOF)
|
|
++printed;
|
|
|
|
printed += thread__dump_stats(ttrace, trace, fp);
|
|
|
|
return printed;
|
|
}
|
|
|
|
static unsigned long thread__nr_events(struct thread_trace *ttrace)
|
|
{
|
|
return ttrace ? ttrace->nr_events : 0;
|
|
}
|
|
|
|
DEFINE_RESORT_RB(threads, (thread__nr_events(a->thread->priv) < thread__nr_events(b->thread->priv)),
|
|
struct thread *thread;
|
|
)
|
|
{
|
|
entry->thread = rb_entry(nd, struct thread, rb_node);
|
|
}
|
|
|
|
static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp)
|
|
{
|
|
size_t printed = trace__fprintf_threads_header(fp);
|
|
struct rb_node *nd;
|
|
int i;
|
|
|
|
for (i = 0; i < THREADS__TABLE_SIZE; i++) {
|
|
DECLARE_RESORT_RB_MACHINE_THREADS(threads, trace->host, i);
|
|
|
|
if (threads == NULL) {
|
|
fprintf(fp, "%s", "Error sorting output by nr_events!\n");
|
|
return 0;
|
|
}
|
|
|
|
resort_rb__for_each_entry(nd, threads)
|
|
printed += trace__fprintf_thread(fp, threads_entry->thread, trace);
|
|
|
|
resort_rb__delete(threads);
|
|
}
|
|
return printed;
|
|
}
|
|
|
|
static int trace__set_duration(const struct option *opt, const char *str,
|
|
int unset __maybe_unused)
|
|
{
|
|
struct trace *trace = opt->value;
|
|
|
|
trace->duration_filter = atof(str);
|
|
return 0;
|
|
}
|
|
|
|
static int trace__set_filter_pids(const struct option *opt, const char *str,
|
|
int unset __maybe_unused)
|
|
{
|
|
int ret = -1;
|
|
size_t i;
|
|
struct trace *trace = opt->value;
|
|
/*
|
|
* FIXME: introduce a intarray class, plain parse csv and create a
|
|
* { int nr, int entries[] } struct...
|
|
*/
|
|
struct intlist *list = intlist__new(str);
|
|
|
|
if (list == NULL)
|
|
return -1;
|
|
|
|
i = trace->filter_pids.nr = intlist__nr_entries(list) + 1;
|
|
trace->filter_pids.entries = calloc(i, sizeof(pid_t));
|
|
|
|
if (trace->filter_pids.entries == NULL)
|
|
goto out;
|
|
|
|
trace->filter_pids.entries[0] = getpid();
|
|
|
|
for (i = 1; i < trace->filter_pids.nr; ++i)
|
|
trace->filter_pids.entries[i] = intlist__entry(list, i - 1)->i;
|
|
|
|
intlist__delete(list);
|
|
ret = 0;
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int trace__open_output(struct trace *trace, const char *filename)
|
|
{
|
|
struct stat st;
|
|
|
|
if (!stat(filename, &st) && st.st_size) {
|
|
char oldname[PATH_MAX];
|
|
|
|
scnprintf(oldname, sizeof(oldname), "%s.old", filename);
|
|
unlink(oldname);
|
|
rename(filename, oldname);
|
|
}
|
|
|
|
trace->output = fopen(filename, "w");
|
|
|
|
return trace->output == NULL ? -errno : 0;
|
|
}
|
|
|
|
static int parse_pagefaults(const struct option *opt, const char *str,
|
|
int unset __maybe_unused)
|
|
{
|
|
int *trace_pgfaults = opt->value;
|
|
|
|
if (strcmp(str, "all") == 0)
|
|
*trace_pgfaults |= TRACE_PFMAJ | TRACE_PFMIN;
|
|
else if (strcmp(str, "maj") == 0)
|
|
*trace_pgfaults |= TRACE_PFMAJ;
|
|
else if (strcmp(str, "min") == 0)
|
|
*trace_pgfaults |= TRACE_PFMIN;
|
|
else
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void evlist__set_evsel_handler(struct perf_evlist *evlist, void *handler)
|
|
{
|
|
struct perf_evsel *evsel;
|
|
|
|
evlist__for_each_entry(evlist, evsel)
|
|
evsel->handler = handler;
|
|
}
|
|
|
|
/*
|
|
* XXX: Hackish, just splitting the combined -e+--event (syscalls
|
|
* (raw_syscalls:{sys_{enter,exit}} + events (tracepoints, HW, SW, etc) to use
|
|
* existing facilities unchanged (trace->ev_qualifier + parse_options()).
|
|
*
|
|
* It'd be better to introduce a parse_options() variant that would return a
|
|
* list with the terms it didn't match to an event...
|
|
*/
|
|
static int trace__parse_events_option(const struct option *opt, const char *str,
|
|
int unset __maybe_unused)
|
|
{
|
|
struct trace *trace = (struct trace *)opt->value;
|
|
const char *s = str;
|
|
char *sep = NULL, *lists[2] = { NULL, NULL, };
|
|
int len = strlen(str) + 1, err = -1, list, idx;
|
|
char *strace_groups_dir = system_path(STRACE_GROUPS_DIR);
|
|
char group_name[PATH_MAX];
|
|
|
|
if (strace_groups_dir == NULL)
|
|
return -1;
|
|
|
|
if (*s == '!') {
|
|
++s;
|
|
trace->not_ev_qualifier = true;
|
|
}
|
|
|
|
while (1) {
|
|
if ((sep = strchr(s, ',')) != NULL)
|
|
*sep = '\0';
|
|
|
|
list = 0;
|
|
if (syscalltbl__id(trace->sctbl, s) >= 0 ||
|
|
syscalltbl__strglobmatch_first(trace->sctbl, s, &idx) >= 0) {
|
|
list = 1;
|
|
} else {
|
|
path__join(group_name, sizeof(group_name), strace_groups_dir, s);
|
|
if (access(group_name, R_OK) == 0)
|
|
list = 1;
|
|
}
|
|
|
|
if (lists[list]) {
|
|
sprintf(lists[list] + strlen(lists[list]), ",%s", s);
|
|
} else {
|
|
lists[list] = malloc(len);
|
|
if (lists[list] == NULL)
|
|
goto out;
|
|
strcpy(lists[list], s);
|
|
}
|
|
|
|
if (!sep)
|
|
break;
|
|
|
|
*sep = ',';
|
|
s = sep + 1;
|
|
}
|
|
|
|
if (lists[1] != NULL) {
|
|
struct strlist_config slist_config = {
|
|
.dirname = strace_groups_dir,
|
|
};
|
|
|
|
trace->ev_qualifier = strlist__new(lists[1], &slist_config);
|
|
if (trace->ev_qualifier == NULL) {
|
|
fputs("Not enough memory to parse event qualifier", trace->output);
|
|
goto out;
|
|
}
|
|
|
|
if (trace__validate_ev_qualifier(trace))
|
|
goto out;
|
|
}
|
|
|
|
err = 0;
|
|
|
|
if (lists[0]) {
|
|
struct option o = OPT_CALLBACK('e', "event", &trace->evlist, "event",
|
|
"event selector. use 'perf list' to list available events",
|
|
parse_events_option);
|
|
err = parse_events_option(&o, lists[0], 0);
|
|
}
|
|
out:
|
|
if (sep)
|
|
*sep = ',';
|
|
|
|
return err;
|
|
}
|
|
|
|
int cmd_trace(int argc, const char **argv)
|
|
{
|
|
const char *trace_usage[] = {
|
|
"perf trace [<options>] [<command>]",
|
|
"perf trace [<options>] -- <command> [<options>]",
|
|
"perf trace record [<options>] [<command>]",
|
|
"perf trace record [<options>] -- <command> [<options>]",
|
|
NULL
|
|
};
|
|
struct trace trace = {
|
|
.syscalls = {
|
|
. max = -1,
|
|
},
|
|
.opts = {
|
|
.target = {
|
|
.uid = UINT_MAX,
|
|
.uses_mmap = true,
|
|
},
|
|
.user_freq = UINT_MAX,
|
|
.user_interval = ULLONG_MAX,
|
|
.no_buffering = true,
|
|
.mmap_pages = UINT_MAX,
|
|
.proc_map_timeout = 500,
|
|
},
|
|
.output = stderr,
|
|
.show_comm = true,
|
|
.trace_syscalls = true,
|
|
.kernel_syscallchains = false,
|
|
.max_stack = UINT_MAX,
|
|
};
|
|
const char *output_name = NULL;
|
|
const struct option trace_options[] = {
|
|
OPT_CALLBACK('e', "event", &trace, "event",
|
|
"event/syscall selector. use 'perf list' to list available events",
|
|
trace__parse_events_option),
|
|
OPT_BOOLEAN(0, "comm", &trace.show_comm,
|
|
"show the thread COMM next to its id"),
|
|
OPT_BOOLEAN(0, "tool_stats", &trace.show_tool_stats, "show tool stats"),
|
|
OPT_CALLBACK(0, "expr", &trace, "expr", "list of syscalls/events to trace",
|
|
trace__parse_events_option),
|
|
OPT_STRING('o', "output", &output_name, "file", "output file name"),
|
|
OPT_STRING('i', "input", &input_name, "file", "Analyze events in file"),
|
|
OPT_STRING('p', "pid", &trace.opts.target.pid, "pid",
|
|
"trace events on existing process id"),
|
|
OPT_STRING('t', "tid", &trace.opts.target.tid, "tid",
|
|
"trace events on existing thread id"),
|
|
OPT_CALLBACK(0, "filter-pids", &trace, "CSV list of pids",
|
|
"pids to filter (by the kernel)", trace__set_filter_pids),
|
|
OPT_BOOLEAN('a', "all-cpus", &trace.opts.target.system_wide,
|
|
"system-wide collection from all CPUs"),
|
|
OPT_STRING('C', "cpu", &trace.opts.target.cpu_list, "cpu",
|
|
"list of cpus to monitor"),
|
|
OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit,
|
|
"child tasks do not inherit counters"),
|
|
OPT_CALLBACK('m', "mmap-pages", &trace.opts.mmap_pages, "pages",
|
|
"number of mmap data pages",
|
|
perf_evlist__parse_mmap_pages),
|
|
OPT_STRING('u', "uid", &trace.opts.target.uid_str, "user",
|
|
"user to profile"),
|
|
OPT_CALLBACK(0, "duration", &trace, "float",
|
|
"show only events with duration > N.M ms",
|
|
trace__set_duration),
|
|
OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"),
|
|
OPT_INCR('v', "verbose", &verbose, "be more verbose"),
|
|
OPT_BOOLEAN('T', "time", &trace.full_time,
|
|
"Show full timestamp, not time relative to first start"),
|
|
OPT_BOOLEAN('s', "summary", &trace.summary_only,
|
|
"Show only syscall summary with statistics"),
|
|
OPT_BOOLEAN('S', "with-summary", &trace.summary,
|
|
"Show all syscalls and summary with statistics"),
|
|
OPT_CALLBACK_DEFAULT('F', "pf", &trace.trace_pgfaults, "all|maj|min",
|
|
"Trace pagefaults", parse_pagefaults, "maj"),
|
|
OPT_BOOLEAN(0, "syscalls", &trace.trace_syscalls, "Trace syscalls"),
|
|
OPT_BOOLEAN('f', "force", &trace.force, "don't complain, do it"),
|
|
OPT_CALLBACK(0, "call-graph", &trace.opts,
|
|
"record_mode[,record_size]", record_callchain_help,
|
|
&record_parse_callchain_opt),
|
|
OPT_BOOLEAN(0, "kernel-syscall-graph", &trace.kernel_syscallchains,
|
|
"Show the kernel callchains on the syscall exit path"),
|
|
OPT_UINTEGER(0, "min-stack", &trace.min_stack,
|
|
"Set the minimum stack depth when parsing the callchain, "
|
|
"anything below the specified depth will be ignored."),
|
|
OPT_UINTEGER(0, "max-stack", &trace.max_stack,
|
|
"Set the maximum stack depth when parsing the callchain, "
|
|
"anything beyond the specified depth will be ignored. "
|
|
"Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)),
|
|
OPT_UINTEGER(0, "proc-map-timeout", &trace.opts.proc_map_timeout,
|
|
"per thread proc mmap processing timeout in ms"),
|
|
OPT_UINTEGER('D', "delay", &trace.opts.initial_delay,
|
|
"ms to wait before starting measurement after program "
|
|
"start"),
|
|
OPT_END()
|
|
};
|
|
bool __maybe_unused max_stack_user_set = true;
|
|
bool mmap_pages_user_set = true;
|
|
const char * const trace_subcommands[] = { "record", NULL };
|
|
int err;
|
|
char bf[BUFSIZ];
|
|
|
|
signal(SIGSEGV, sighandler_dump_stack);
|
|
signal(SIGFPE, sighandler_dump_stack);
|
|
|
|
trace.evlist = perf_evlist__new();
|
|
trace.sctbl = syscalltbl__new();
|
|
|
|
if (trace.evlist == NULL || trace.sctbl == NULL) {
|
|
pr_err("Not enough memory to run!\n");
|
|
err = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
argc = parse_options_subcommand(argc, argv, trace_options, trace_subcommands,
|
|
trace_usage, PARSE_OPT_STOP_AT_NON_OPTION);
|
|
|
|
err = bpf__setup_stdout(trace.evlist);
|
|
if (err) {
|
|
bpf__strerror_setup_stdout(trace.evlist, err, bf, sizeof(bf));
|
|
pr_err("ERROR: Setup BPF stdout failed: %s\n", bf);
|
|
goto out;
|
|
}
|
|
|
|
err = -1;
|
|
|
|
if (trace.trace_pgfaults) {
|
|
trace.opts.sample_address = true;
|
|
trace.opts.sample_time = true;
|
|
}
|
|
|
|
if (trace.opts.mmap_pages == UINT_MAX)
|
|
mmap_pages_user_set = false;
|
|
|
|
if (trace.max_stack == UINT_MAX) {
|
|
trace.max_stack = input_name ? PERF_MAX_STACK_DEPTH : sysctl_perf_event_max_stack;
|
|
max_stack_user_set = false;
|
|
}
|
|
|
|
#ifdef HAVE_DWARF_UNWIND_SUPPORT
|
|
if ((trace.min_stack || max_stack_user_set) && !callchain_param.enabled && trace.trace_syscalls)
|
|
record_opts__parse_callchain(&trace.opts, &callchain_param, "dwarf", false);
|
|
#endif
|
|
|
|
if (callchain_param.enabled) {
|
|
if (!mmap_pages_user_set && geteuid() == 0)
|
|
trace.opts.mmap_pages = perf_event_mlock_kb_in_pages() * 4;
|
|
|
|
symbol_conf.use_callchain = true;
|
|
}
|
|
|
|
if (trace.evlist->nr_entries > 0)
|
|
evlist__set_evsel_handler(trace.evlist, trace__event_handler);
|
|
|
|
if ((argc >= 1) && (strcmp(argv[0], "record") == 0))
|
|
return trace__record(&trace, argc-1, &argv[1]);
|
|
|
|
/* summary_only implies summary option, but don't overwrite summary if set */
|
|
if (trace.summary_only)
|
|
trace.summary = trace.summary_only;
|
|
|
|
if (!trace.trace_syscalls && !trace.trace_pgfaults &&
|
|
trace.evlist->nr_entries == 0 /* Was --events used? */) {
|
|
pr_err("Please specify something to trace.\n");
|
|
return -1;
|
|
}
|
|
|
|
if (!trace.trace_syscalls && trace.ev_qualifier) {
|
|
pr_err("The -e option can't be used with --no-syscalls.\n");
|
|
goto out;
|
|
}
|
|
|
|
if (output_name != NULL) {
|
|
err = trace__open_output(&trace, output_name);
|
|
if (err < 0) {
|
|
perror("failed to create output file");
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
trace.open_id = syscalltbl__id(trace.sctbl, "open");
|
|
|
|
err = target__validate(&trace.opts.target);
|
|
if (err) {
|
|
target__strerror(&trace.opts.target, err, bf, sizeof(bf));
|
|
fprintf(trace.output, "%s", bf);
|
|
goto out_close;
|
|
}
|
|
|
|
err = target__parse_uid(&trace.opts.target);
|
|
if (err) {
|
|
target__strerror(&trace.opts.target, err, bf, sizeof(bf));
|
|
fprintf(trace.output, "%s", bf);
|
|
goto out_close;
|
|
}
|
|
|
|
if (!argc && target__none(&trace.opts.target))
|
|
trace.opts.target.system_wide = true;
|
|
|
|
if (input_name)
|
|
err = trace__replay(&trace);
|
|
else
|
|
err = trace__run(&trace, argc, argv);
|
|
|
|
out_close:
|
|
if (output_name != NULL)
|
|
fclose(trace.output);
|
|
out:
|
|
return err;
|
|
}
|