5106 строки
145 KiB
C
5106 строки
145 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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#include "util/record.h"
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#include <traceevent/event-parse.h>
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#include <api/fs/tracing_path.h>
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#include <bpf/bpf.h>
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#include "util/bpf_map.h"
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#include "util/rlimit.h"
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#include "builtin.h"
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#include "util/cgroup.h"
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#include "util/color.h"
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#include "util/config.h"
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#include "util/debug.h"
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#include "util/dso.h"
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#include "util/env.h"
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#include "util/event.h"
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#include "util/evsel.h"
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#include "util/evsel_fprintf.h"
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#include "util/synthetic-events.h"
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#include "util/evlist.h"
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#include "util/evswitch.h"
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#include "util/mmap.h"
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#include <subcmd/pager.h>
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#include <subcmd/exec-cmd.h>
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#include "util/machine.h"
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#include "util/map.h"
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#include "util/symbol.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 "util/tool.h"
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#include "util/util.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 "../perf.h"
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#include <errno.h>
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#include <inttypes.h>
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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/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 <linux/zalloc.h>
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#include <fcntl.h>
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#include <sys/sysmacros.h>
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#include <linux/ctype.h>
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#include <perf/mmap.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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/*
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* strtoul: Go from a string to a value, i.e. for msr: MSR_FS_BASE to 0xc0000100
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*/
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struct syscall_arg_fmt {
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size_t (*scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
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bool (*strtoul)(char *bf, size_t size, struct syscall_arg *arg, u64 *val);
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unsigned long (*mask_val)(struct syscall_arg *arg, unsigned long val);
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void *parm;
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const char *name;
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u16 nr_entries; // for arrays
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bool show_zero;
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};
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struct syscall_fmt {
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const char *name;
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const char *alias;
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struct {
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const char *sys_enter,
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*sys_exit;
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} bpf_prog_name;
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struct syscall_arg_fmt arg[6];
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u8 nr_args;
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bool errpid;
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bool timeout;
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bool hexret;
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};
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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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struct syscall *table;
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struct bpf_map *map;
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struct { // per syscall BPF_MAP_TYPE_PROG_ARRAY
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struct bpf_map *sys_enter,
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*sys_exit;
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} prog_array;
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struct {
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struct evsel *sys_enter,
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*sys_exit,
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*augmented;
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} events;
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struct bpf_program *unaugmented_prog;
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} syscalls;
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struct {
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struct bpf_map *map;
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} dump;
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struct record_opts opts;
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struct evlist *evlist;
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struct machine *host;
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struct thread *current;
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struct bpf_object *bpf_obj;
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struct cgroup *cgroup;
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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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unsigned long nr_events_printed;
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unsigned long max_events;
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struct evswitch evswitch;
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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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struct bpf_map *map;
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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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int raw_augmented_syscalls_args_size;
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bool raw_augmented_syscalls;
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bool fd_path_disabled;
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bool sort_events;
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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 errno_summary;
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bool failure_only;
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bool show_comm;
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bool print_sample;
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bool show_tool_stats;
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bool trace_syscalls;
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bool libtraceevent_print;
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bool kernel_syscallchains;
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s16 args_alignment;
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bool show_tstamp;
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bool show_duration;
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bool show_zeros;
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bool show_arg_names;
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bool show_string_prefix;
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bool force;
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bool vfs_getname;
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int trace_pgfaults;
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char *perfconfig_events;
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struct {
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struct ordered_events data;
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u64 last;
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} oe;
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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, int size, int offset, bool needs_swap)
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{
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field->offset = offset;
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switch (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 int tp_field__init_uint(struct tp_field *field, struct tep_format_field *format_field, bool needs_swap)
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{
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return __tp_field__init_uint(field, format_field->size, format_field->offset, needs_swap);
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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, int offset)
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{
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field->offset = offset;
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field->pointer = tp_field__ptr;
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return 0;
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}
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static int tp_field__init_ptr(struct tp_field *field, struct tep_format_field *format_field)
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{
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return __tp_field__init_ptr(field, format_field->offset);
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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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/*
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* The evsel->priv as used by 'perf trace'
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* sc: for raw_syscalls:sys_{enter,exit} and syscalls:sys_{enter,exit}_SYSCALLNAME
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* fmt: for all the other tracepoints
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*/
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struct evsel_trace {
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struct syscall_tp sc;
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struct syscall_arg_fmt *fmt;
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};
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static struct evsel_trace *evsel_trace__new(void)
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{
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return zalloc(sizeof(struct evsel_trace));
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}
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static void evsel_trace__delete(struct evsel_trace *et)
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{
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if (et == NULL)
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return;
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zfree(&et->fmt);
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free(et);
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}
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/*
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* Used with raw_syscalls:sys_{enter,exit} and with the
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* syscalls:sys_{enter,exit}_SYSCALL tracepoints
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*/
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static inline struct syscall_tp *__evsel__syscall_tp(struct evsel *evsel)
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{
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struct evsel_trace *et = evsel->priv;
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return &et->sc;
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}
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static struct syscall_tp *evsel__syscall_tp(struct evsel *evsel)
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{
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if (evsel->priv == NULL) {
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evsel->priv = evsel_trace__new();
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if (evsel->priv == NULL)
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return NULL;
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}
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return __evsel__syscall_tp(evsel);
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}
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/*
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* Used with all the other tracepoints.
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*/
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static inline struct syscall_arg_fmt *__evsel__syscall_arg_fmt(struct evsel *evsel)
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{
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struct evsel_trace *et = evsel->priv;
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return et->fmt;
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}
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static struct syscall_arg_fmt *evsel__syscall_arg_fmt(struct evsel *evsel)
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{
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struct evsel_trace *et = evsel->priv;
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if (evsel->priv == NULL) {
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et = evsel->priv = evsel_trace__new();
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if (et == NULL)
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return NULL;
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}
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if (et->fmt == NULL) {
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et->fmt = calloc(evsel->tp_format->format.nr_fields, sizeof(struct syscall_arg_fmt));
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if (et->fmt == NULL)
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goto out_delete;
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}
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return __evsel__syscall_arg_fmt(evsel);
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out_delete:
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evsel_trace__delete(evsel->priv);
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evsel->priv = NULL;
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return NULL;
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}
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static int perf_evsel__init_tp_uint_field(struct 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 tep_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__syscall_tp(evsel);\
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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 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 tep_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__syscall_tp(evsel);\
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perf_evsel__init_tp_ptr_field(evsel, &sc->name, #name); })
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static void evsel__delete_priv(struct evsel *evsel)
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{
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zfree(&evsel->priv);
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evsel__delete(evsel);
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}
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static int perf_evsel__init_syscall_tp(struct evsel *evsel)
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{
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struct syscall_tp *sc = evsel__syscall_tp(evsel);
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if (sc != NULL) {
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if (perf_evsel__init_tp_uint_field(evsel, &sc->id, "__syscall_nr") &&
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perf_evsel__init_tp_uint_field(evsel, &sc->id, "nr"))
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return -ENOENT;
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return 0;
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}
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return -ENOMEM;
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}
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static int perf_evsel__init_augmented_syscall_tp(struct evsel *evsel, struct evsel *tp)
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{
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struct syscall_tp *sc = evsel__syscall_tp(evsel);
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if (sc != NULL) {
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struct tep_format_field *syscall_id = perf_evsel__field(tp, "id");
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if (syscall_id == NULL)
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syscall_id = perf_evsel__field(tp, "__syscall_nr");
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if (syscall_id == NULL ||
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__tp_field__init_uint(&sc->id, syscall_id->size, syscall_id->offset, evsel->needs_swap))
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return -EINVAL;
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return 0;
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}
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return -ENOMEM;
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}
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static int perf_evsel__init_augmented_syscall_tp_args(struct evsel *evsel)
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{
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struct syscall_tp *sc = __evsel__syscall_tp(evsel);
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return __tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64));
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}
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static int perf_evsel__init_augmented_syscall_tp_ret(struct evsel *evsel)
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{
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struct syscall_tp *sc = __evsel__syscall_tp(evsel);
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return __tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap);
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}
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static int perf_evsel__init_raw_syscall_tp(struct evsel *evsel, void *handler)
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{
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if (evsel__syscall_tp(evsel) != NULL) {
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if (perf_evsel__init_sc_tp_uint_field(evsel, id))
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return -ENOENT;
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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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}
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static struct evsel *perf_evsel__raw_syscall_newtp(const char *direction, void *handler)
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{
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struct 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_raw_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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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__syscall_tp(evsel); \
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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__syscall_tp(evsel); \
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fields->name.pointer(&fields->name, sample); })
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size_t strarray__scnprintf_suffix(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_suffix, 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 || sa->entries[idx] == NULL) {
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size_t printed = scnprintf(bf, size, intfmt, val);
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if (show_suffix)
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printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix);
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return printed;
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}
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return scnprintf(bf, size, "%s%s", sa->entries[idx], show_suffix ? sa->prefix : "");
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}
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size_t strarray__scnprintf(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_prefix, 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 || sa->entries[idx] == NULL) {
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size_t printed = scnprintf(bf, size, intfmt, val);
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if (show_prefix)
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printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix);
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return printed;
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}
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return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", 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,
|
|
struct syscall_arg *arg)
|
|
{
|
|
return strarray__scnprintf(arg->parm, bf, size, intfmt, arg->show_string_prefix, arg->val);
|
|
}
|
|
|
|
static size_t syscall_arg__scnprintf_strarray(char *bf, size_t size,
|
|
struct syscall_arg *arg)
|
|
{
|
|
return __syscall_arg__scnprintf_strarray(bf, size, "%d", arg);
|
|
}
|
|
|
|
#define SCA_STRARRAY syscall_arg__scnprintf_strarray
|
|
|
|
bool syscall_arg__strtoul_strarray(char *bf, size_t size, struct syscall_arg *arg, u64 *ret)
|
|
{
|
|
return strarray__strtoul(arg->parm, bf, size, ret);
|
|
}
|
|
|
|
bool syscall_arg__strtoul_strarray_flags(char *bf, size_t size, struct syscall_arg *arg, u64 *ret)
|
|
{
|
|
return strarray__strtoul_flags(arg->parm, bf, size, ret);
|
|
}
|
|
|
|
bool syscall_arg__strtoul_strarrays(char *bf, size_t size, struct syscall_arg *arg, u64 *ret)
|
|
{
|
|
return strarrays__strtoul(arg->parm, bf, size, ret);
|
|
}
|
|
|
|
size_t syscall_arg__scnprintf_strarray_flags(char *bf, size_t size, struct syscall_arg *arg)
|
|
{
|
|
return strarray__scnprintf_flags(arg->parm, bf, size, arg->show_string_prefix, arg->val);
|
|
}
|
|
|
|
size_t strarrays__scnprintf(struct strarrays *sas, char *bf, size_t size, const char *intfmt, bool show_prefix, int val)
|
|
{
|
|
size_t printed;
|
|
int i;
|
|
|
|
for (i = 0; i < sas->nr_entries; ++i) {
|
|
struct strarray *sa = sas->entries[i];
|
|
int idx = val - sa->offset;
|
|
|
|
if (idx >= 0 && idx < sa->nr_entries) {
|
|
if (sa->entries[idx] == NULL)
|
|
break;
|
|
return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]);
|
|
}
|
|
}
|
|
|
|
printed = scnprintf(bf, size, intfmt, val);
|
|
if (show_prefix)
|
|
printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sas->entries[0]->prefix);
|
|
return printed;
|
|
}
|
|
|
|
bool strarray__strtoul(struct strarray *sa, char *bf, size_t size, u64 *ret)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < sa->nr_entries; ++i) {
|
|
if (sa->entries[i] && strncmp(sa->entries[i], bf, size) == 0 && sa->entries[i][size] == '\0') {
|
|
*ret = sa->offset + i;
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool strarray__strtoul_flags(struct strarray *sa, char *bf, size_t size, u64 *ret)
|
|
{
|
|
u64 val = 0;
|
|
char *tok = bf, *sep, *end;
|
|
|
|
*ret = 0;
|
|
|
|
while (size != 0) {
|
|
int toklen = size;
|
|
|
|
sep = memchr(tok, '|', size);
|
|
if (sep != NULL) {
|
|
size -= sep - tok + 1;
|
|
|
|
end = sep - 1;
|
|
while (end > tok && isspace(*end))
|
|
--end;
|
|
|
|
toklen = end - tok + 1;
|
|
}
|
|
|
|
while (isspace(*tok))
|
|
++tok;
|
|
|
|
if (isalpha(*tok) || *tok == '_') {
|
|
if (!strarray__strtoul(sa, tok, toklen, &val))
|
|
return false;
|
|
} else {
|
|
bool is_hexa = tok[0] == 0 && (tok[1] = 'x' || tok[1] == 'X');
|
|
|
|
val = strtoul(tok, NULL, is_hexa ? 16 : 0);
|
|
}
|
|
|
|
*ret |= (1 << (val - 1));
|
|
|
|
if (sep == NULL)
|
|
break;
|
|
tok = sep + 1;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool strarrays__strtoul(struct strarrays *sas, char *bf, size_t size, u64 *ret)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < sas->nr_entries; ++i) {
|
|
struct strarray *sa = sas->entries[i];
|
|
|
|
if (strarray__strtoul(sa, bf, size, ret))
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
size_t syscall_arg__scnprintf_strarrays(char *bf, size_t size,
|
|
struct syscall_arg *arg)
|
|
{
|
|
return strarrays__scnprintf(arg->parm, bf, size, "%d", arg->show_string_prefix, arg->val);
|
|
}
|
|
|
|
#ifndef AT_FDCWD
|
|
#define AT_FDCWD -100
|
|
#endif
|
|
|
|
static size_t syscall_arg__scnprintf_fd_at(char *bf, size_t size,
|
|
struct syscall_arg *arg)
|
|
{
|
|
int fd = arg->val;
|
|
const char *prefix = "AT_FD";
|
|
|
|
if (fd == AT_FDCWD)
|
|
return scnprintf(bf, size, "%s%s", arg->show_string_prefix ? prefix : "", "CWD");
|
|
|
|
return syscall_arg__scnprintf_fd(bf, size, arg);
|
|
}
|
|
|
|
#define SCA_FDAT syscall_arg__scnprintf_fd_at
|
|
|
|
static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
|
|
struct syscall_arg *arg);
|
|
|
|
#define SCA_CLOSE_FD syscall_arg__scnprintf_close_fd
|
|
|
|
size_t syscall_arg__scnprintf_hex(char *bf, size_t size, struct syscall_arg *arg)
|
|
{
|
|
return scnprintf(bf, size, "%#lx", arg->val);
|
|
}
|
|
|
|
size_t syscall_arg__scnprintf_ptr(char *bf, size_t size, struct syscall_arg *arg)
|
|
{
|
|
if (arg->val == 0)
|
|
return scnprintf(bf, size, "NULL");
|
|
return syscall_arg__scnprintf_hex(bf, size, arg);
|
|
}
|
|
|
|
size_t syscall_arg__scnprintf_int(char *bf, size_t size, struct syscall_arg *arg)
|
|
{
|
|
return scnprintf(bf, size, "%d", arg->val);
|
|
}
|
|
|
|
size_t syscall_arg__scnprintf_long(char *bf, size_t size, struct syscall_arg *arg)
|
|
{
|
|
return scnprintf(bf, size, "%ld", arg->val);
|
|
}
|
|
|
|
static size_t syscall_arg__scnprintf_char_array(char *bf, size_t size, struct syscall_arg *arg)
|
|
{
|
|
// XXX Hey, maybe for sched:sched_switch prev/next comm fields we can
|
|
// fill missing comms using thread__set_comm()...
|
|
// here or in a special syscall_arg__scnprintf_pid_sched_tp...
|
|
return scnprintf(bf, size, "\"%-.*s\"", arg->fmt->nr_entries ?: arg->len, arg->val);
|
|
}
|
|
|
|
#define SCA_CHAR_ARRAY syscall_arg__scnprintf_char_array
|
|
|
|
static const char *bpf_cmd[] = {
|
|
"MAP_CREATE", "MAP_LOOKUP_ELEM", "MAP_UPDATE_ELEM", "MAP_DELETE_ELEM",
|
|
"MAP_GET_NEXT_KEY", "PROG_LOAD",
|
|
};
|
|
static DEFINE_STRARRAY(bpf_cmd, "BPF_");
|
|
|
|
static const char *fsmount_flags[] = {
|
|
[1] = "CLOEXEC",
|
|
};
|
|
static DEFINE_STRARRAY(fsmount_flags, "FSMOUNT_");
|
|
|
|
#include "trace/beauty/generated/fsconfig_arrays.c"
|
|
|
|
static DEFINE_STRARRAY(fsconfig_cmds, "FSCONFIG_");
|
|
|
|
static const char *epoll_ctl_ops[] = { "ADD", "DEL", "MOD", };
|
|
static DEFINE_STRARRAY_OFFSET(epoll_ctl_ops, "EPOLL_CTL_", 1);
|
|
|
|
static const char *itimers[] = { "REAL", "VIRTUAL", "PROF", };
|
|
static DEFINE_STRARRAY(itimers, "ITIMER_");
|
|
|
|
static const char *keyctl_options[] = {
|
|
"GET_KEYRING_ID", "JOIN_SESSION_KEYRING", "UPDATE", "REVOKE", "CHOWN",
|
|
"SETPERM", "DESCRIBE", "CLEAR", "LINK", "UNLINK", "SEARCH", "READ",
|
|
"INSTANTIATE", "NEGATE", "SET_REQKEY_KEYRING", "SET_TIMEOUT",
|
|
"ASSUME_AUTHORITY", "GET_SECURITY", "SESSION_TO_PARENT", "REJECT",
|
|
"INSTANTIATE_IOV", "INVALIDATE", "GET_PERSISTENT",
|
|
};
|
|
static DEFINE_STRARRAY(keyctl_options, "KEYCTL_");
|
|
|
|
static const char *whences[] = { "SET", "CUR", "END",
|
|
#ifdef SEEK_DATA
|
|
"DATA",
|
|
#endif
|
|
#ifdef SEEK_HOLE
|
|
"HOLE",
|
|
#endif
|
|
};
|
|
static DEFINE_STRARRAY(whences, "SEEK_");
|
|
|
|
static const char *fcntl_cmds[] = {
|
|
"DUPFD", "GETFD", "SETFD", "GETFL", "SETFL", "GETLK", "SETLK",
|
|
"SETLKW", "SETOWN", "GETOWN", "SETSIG", "GETSIG", "GETLK64",
|
|
"SETLK64", "SETLKW64", "SETOWN_EX", "GETOWN_EX",
|
|
"GETOWNER_UIDS",
|
|
};
|
|
static DEFINE_STRARRAY(fcntl_cmds, "F_");
|
|
|
|
static const char *fcntl_linux_specific_cmds[] = {
|
|
"SETLEASE", "GETLEASE", "NOTIFY", [5] = "CANCELLK", "DUPFD_CLOEXEC",
|
|
"SETPIPE_SZ", "GETPIPE_SZ", "ADD_SEALS", "GET_SEALS",
|
|
"GET_RW_HINT", "SET_RW_HINT", "GET_FILE_RW_HINT", "SET_FILE_RW_HINT",
|
|
};
|
|
|
|
static DEFINE_STRARRAY_OFFSET(fcntl_linux_specific_cmds, "F_", F_LINUX_SPECIFIC_BASE);
|
|
|
|
static struct strarray *fcntl_cmds_arrays[] = {
|
|
&strarray__fcntl_cmds,
|
|
&strarray__fcntl_linux_specific_cmds,
|
|
};
|
|
|
|
static DEFINE_STRARRAYS(fcntl_cmds_arrays);
|
|
|
|
static const char *rlimit_resources[] = {
|
|
"CPU", "FSIZE", "DATA", "STACK", "CORE", "RSS", "NPROC", "NOFILE",
|
|
"MEMLOCK", "AS", "LOCKS", "SIGPENDING", "MSGQUEUE", "NICE", "RTPRIO",
|
|
"RTTIME",
|
|
};
|
|
static DEFINE_STRARRAY(rlimit_resources, "RLIMIT_");
|
|
|
|
static const char *sighow[] = { "BLOCK", "UNBLOCK", "SETMASK", };
|
|
static DEFINE_STRARRAY(sighow, "SIG_");
|
|
|
|
static const char *clockid[] = {
|
|
"REALTIME", "MONOTONIC", "PROCESS_CPUTIME_ID", "THREAD_CPUTIME_ID",
|
|
"MONOTONIC_RAW", "REALTIME_COARSE", "MONOTONIC_COARSE", "BOOTTIME",
|
|
"REALTIME_ALARM", "BOOTTIME_ALARM", "SGI_CYCLE", "TAI"
|
|
};
|
|
static DEFINE_STRARRAY(clockid, "CLOCK_");
|
|
|
|
static size_t syscall_arg__scnprintf_access_mode(char *bf, size_t size,
|
|
struct syscall_arg *arg)
|
|
{
|
|
bool show_prefix = arg->show_string_prefix;
|
|
const char *suffix = "_OK";
|
|
size_t printed = 0;
|
|
int mode = arg->val;
|
|
|
|
if (mode == F_OK) /* 0 */
|
|
return scnprintf(bf, size, "F%s", show_prefix ? suffix : "");
|
|
#define P_MODE(n) \
|
|
if (mode & n##_OK) { \
|
|
printed += scnprintf(bf + printed, size - printed, "%s%s", #n, show_prefix ? suffix : ""); \
|
|
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)
|
|
{
|
|
bool show_prefix = arg->show_string_prefix;
|
|
const char *prefix = "O_";
|
|
int printed = 0, flags = arg->val;
|
|
|
|
#define P_FLAG(n) \
|
|
if (flags & O_##n) { \
|
|
printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #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)
|
|
{
|
|
bool show_prefix = arg->show_string_prefix;
|
|
const char *prefix = "GRND_";
|
|
int printed = 0, flags = arg->val;
|
|
|
|
#define P_FLAG(n) \
|
|
if (flags & GRND_##n) { \
|
|
printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #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, \
|
|
.strtoul = STUL_STRARRAY, \
|
|
.parm = &strarray__##array, }
|
|
|
|
#define STRARRAY_FLAGS(name, array) \
|
|
{ .scnprintf = SCA_STRARRAY_FLAGS, \
|
|
.strtoul = STUL_STRARRAY_FLAGS, \
|
|
.parm = &strarray__##array, }
|
|
|
|
#include "trace/beauty/arch_errno_names.c"
|
|
#include "trace/beauty/eventfd.c"
|
|
#include "trace/beauty/futex_op.c"
|
|
#include "trace/beauty/futex_val3.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"
|
|
|
|
static struct syscall_fmt syscall_fmts[] = {
|
|
{ .name = "access",
|
|
.arg = { [1] = { .scnprintf = SCA_ACCMODE, /* mode */ }, }, },
|
|
{ .name = "arch_prctl",
|
|
.arg = { [0] = { .scnprintf = SCA_X86_ARCH_PRCTL_CODE, /* code */ },
|
|
[1] = { .scnprintf = SCA_PTR, /* arg2 */ }, }, },
|
|
{ .name = "bind",
|
|
.arg = { [0] = { .scnprintf = SCA_INT, /* fd */ },
|
|
[1] = { .scnprintf = SCA_SOCKADDR, /* umyaddr */ },
|
|
[2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, },
|
|
{ .name = "bpf",
|
|
.arg = { [0] = STRARRAY(cmd, bpf_cmd), }, },
|
|
{ .name = "brk", .hexret = true,
|
|
.arg = { [0] = { .scnprintf = SCA_PTR, /* 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 = "connect",
|
|
.arg = { [0] = { .scnprintf = SCA_INT, /* fd */ },
|
|
[1] = { .scnprintf = SCA_SOCKADDR, /* servaddr */ },
|
|
[2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, },
|
|
{ .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 */
|
|
.strtoul = STUL_STRARRAYS,
|
|
.parm = &strarrays__fcntl_cmds_arrays,
|
|
.show_zero = true, },
|
|
[2] = { .scnprintf = SCA_FCNTL_ARG, /* arg */ }, }, },
|
|
{ .name = "flock",
|
|
.arg = { [1] = { .scnprintf = SCA_FLOCK, /* cmd */ }, }, },
|
|
{ .name = "fsconfig",
|
|
.arg = { [1] = STRARRAY(cmd, fsconfig_cmds), }, },
|
|
{ .name = "fsmount",
|
|
.arg = { [1] = STRARRAY_FLAGS(flags, fsmount_flags),
|
|
[2] = { .scnprintf = SCA_FSMOUNT_ATTR_FLAGS, /* attr_flags */ }, }, },
|
|
{ .name = "fspick",
|
|
.arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
|
|
[1] = { .scnprintf = SCA_FILENAME, /* path */ },
|
|
[2] = { .scnprintf = SCA_FSPICK_FLAGS, /* flags */ }, }, },
|
|
{ .name = "fstat", .alias = "newfstat", },
|
|
{ .name = "fstatat", .alias = "newfstatat", },
|
|
{ .name = "futex",
|
|
.arg = { [1] = { .scnprintf = SCA_FUTEX_OP, /* op */ },
|
|
[5] = { .scnprintf = SCA_FUTEX_VAL3, /* val3 */ }, }, },
|
|
{ .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 = "gettid", .errpid = true, },
|
|
{ .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 = "mmap", .hexret = true,
|
|
/* The standard mmap maps to old_mmap on s390x */
|
|
#if defined(__s390x__)
|
|
.alias = "old_mmap",
|
|
#endif
|
|
.arg = { [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ },
|
|
[3] = { .scnprintf = SCA_MMAP_FLAGS, /* flags */
|
|
.strtoul = STUL_STRARRAY_FLAGS,
|
|
.parm = &strarray__mmap_flags, },
|
|
[5] = { .scnprintf = SCA_HEX, /* offset */ }, }, },
|
|
{ .name = "mount",
|
|
.arg = { [0] = { .scnprintf = SCA_FILENAME, /* dev_name */ },
|
|
[3] = { .scnprintf = SCA_MOUNT_FLAGS, /* flags */
|
|
.mask_val = SCAMV_MOUNT_FLAGS, /* flags */ }, }, },
|
|
{ .name = "move_mount",
|
|
.arg = { [0] = { .scnprintf = SCA_FDAT, /* from_dfd */ },
|
|
[1] = { .scnprintf = SCA_FILENAME, /* from_pathname */ },
|
|
[2] = { .scnprintf = SCA_FDAT, /* to_dfd */ },
|
|
[3] = { .scnprintf = SCA_FILENAME, /* to_pathname */ },
|
|
[4] = { .scnprintf = SCA_MOVE_MOUNT_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 = { [3] = { .scnprintf = SCA_MREMAP_FLAGS, /* flags */ }, }, },
|
|
{ .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",
|
|
.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, /* olddirfd */ },
|
|
[2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, }, },
|
|
{ .name = "renameat2",
|
|
.arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ },
|
|
[2] = { .scnprintf = SCA_FDAT, /* newdirfd */ },
|
|
[4] = { .scnprintf = SCA_RENAMEAT2_FLAGS, /* flags */ }, }, },
|
|
{ .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 = "sendfile", .alias = "sendfile64", },
|
|
{ .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 */ },
|
|
[4] = { .scnprintf = SCA_SOCKADDR, /* addr */ }, }, },
|
|
{ .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 */ },
|
|
[2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, },
|
|
{ .name = "socketpair",
|
|
.arg = { [0] = STRARRAY(family, socket_families),
|
|
[1] = { .scnprintf = SCA_SK_TYPE, /* type */ },
|
|
[2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, },
|
|
{ .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 = "sync_file_range",
|
|
.arg = { [3] = { .scnprintf = SCA_SYNC_FILE_RANGE_FLAGS, /* flags */ }, }, },
|
|
{ .name = "tgkill",
|
|
.arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
|
|
{ .name = "tkill",
|
|
.arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
|
|
{ .name = "umount2", .alias = "umount",
|
|
.arg = { [0] = { .scnprintf = SCA_FILENAME, /* name */ }, }, },
|
|
{ .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(struct syscall_fmt *fmts, const int nmemb, const char *name)
|
|
{
|
|
return bsearch(name, fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp);
|
|
}
|
|
|
|
static struct syscall_fmt *syscall_fmt__find(const char *name)
|
|
{
|
|
const int nmemb = ARRAY_SIZE(syscall_fmts);
|
|
return __syscall_fmt__find(syscall_fmts, nmemb, name);
|
|
}
|
|
|
|
static struct syscall_fmt *__syscall_fmt__find_by_alias(struct syscall_fmt *fmts, const int nmemb, const char *alias)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < nmemb; ++i) {
|
|
if (fmts[i].alias && strcmp(fmts[i].alias, alias) == 0)
|
|
return &fmts[i];
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static struct syscall_fmt *syscall_fmt__find_by_alias(const char *alias)
|
|
{
|
|
const int nmemb = ARRAY_SIZE(syscall_fmts);
|
|
return __syscall_fmt__find_by_alias(syscall_fmts, nmemb, alias);
|
|
}
|
|
|
|
/*
|
|
* is_exit: is this "exit" or "exit_group"?
|
|
* is_open: is this "open" or "openat"? To associate the fd returned in sys_exit with the pathname in sys_enter.
|
|
* args_size: sum of the sizes of the syscall arguments, anything after that is augmented stuff: pathname for openat, etc.
|
|
* nonexistent: Just a hole in the syscall table, syscall id not allocated
|
|
*/
|
|
struct syscall {
|
|
struct tep_event *tp_format;
|
|
int nr_args;
|
|
int args_size;
|
|
struct {
|
|
struct bpf_program *sys_enter,
|
|
*sys_exit;
|
|
} bpf_prog;
|
|
bool is_exit;
|
|
bool is_open;
|
|
bool nonexistent;
|
|
struct tep_format_field *args;
|
|
const char *name;
|
|
struct syscall_fmt *fmt;
|
|
struct syscall_arg_fmt *arg_fmt;
|
|
};
|
|
|
|
/*
|
|
* Must match what is in the BPF program:
|
|
*
|
|
* tools/perf/examples/bpf/augmented_raw_syscalls.c
|
|
*/
|
|
struct bpf_map_syscall_entry {
|
|
bool enabled;
|
|
u16 string_args_len[6];
|
|
};
|
|
|
|
/*
|
|
* 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;
|
|
struct file *table;
|
|
} files;
|
|
|
|
struct intlist *syscall_stats;
|
|
};
|
|
|
|
static struct thread_trace *thread_trace__new(void)
|
|
{
|
|
struct thread_trace *ttrace = zalloc(sizeof(struct thread_trace));
|
|
|
|
if (ttrace) {
|
|
ttrace->files.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 struct file *thread_trace__files_entry(struct thread_trace *ttrace, int fd)
|
|
{
|
|
if (fd < 0)
|
|
return NULL;
|
|
|
|
if (fd > ttrace->files.max) {
|
|
struct file *nfiles = realloc(ttrace->files.table, (fd + 1) * sizeof(struct file));
|
|
|
|
if (nfiles == NULL)
|
|
return NULL;
|
|
|
|
if (ttrace->files.max != -1) {
|
|
memset(nfiles + ttrace->files.max + 1, 0,
|
|
(fd - ttrace->files.max) * sizeof(struct file));
|
|
} else {
|
|
memset(nfiles, 0, (fd + 1) * sizeof(struct file));
|
|
}
|
|
|
|
ttrace->files.table = nfiles;
|
|
ttrace->files.max = fd;
|
|
}
|
|
|
|
return ttrace->files.table + fd;
|
|
}
|
|
|
|
struct file *thread__files_entry(struct thread *thread, int fd)
|
|
{
|
|
return thread_trace__files_entry(thread__priv(thread), fd);
|
|
}
|
|
|
|
static int trace__set_fd_pathname(struct thread *thread, int fd, const char *pathname)
|
|
{
|
|
struct thread_trace *ttrace = thread__priv(thread);
|
|
struct file *file = thread_trace__files_entry(ttrace, fd);
|
|
|
|
if (file != NULL) {
|
|
struct stat st;
|
|
if (stat(pathname, &st) == 0)
|
|
file->dev_maj = major(st.st_rdev);
|
|
file->pathname = strdup(pathname);
|
|
if (file->pathname)
|
|
return 0;
|
|
}
|
|
|
|
return -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 || trace->fd_path_disabled)
|
|
return NULL;
|
|
|
|
if (fd < 0)
|
|
return NULL;
|
|
|
|
if ((fd > ttrace->files.max || ttrace->files.table[fd].pathname == NULL)) {
|
|
if (!trace->live)
|
|
return NULL;
|
|
++trace->stats.proc_getname;
|
|
if (thread__read_fd_path(thread, fd))
|
|
return NULL;
|
|
}
|
|
|
|
return ttrace->files.table[fd].pathname;
|
|
}
|
|
|
|
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->files.max)
|
|
zfree(&ttrace->files.table[fd].pathname);
|
|
|
|
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_augmented_string(struct syscall_arg *arg, char *bf, size_t size)
|
|
{
|
|
struct augmented_arg *augmented_arg = arg->augmented.args;
|
|
size_t printed = scnprintf(bf, size, "\"%.*s\"", augmented_arg->size, augmented_arg->value);
|
|
/*
|
|
* So that the next arg with a payload can consume its augmented arg, i.e. for rename* syscalls
|
|
* we would have two strings, each prefixed by its size.
|
|
*/
|
|
int consumed = sizeof(*augmented_arg) + augmented_arg->size;
|
|
|
|
arg->augmented.args = ((void *)arg->augmented.args) + consumed;
|
|
arg->augmented.size -= consumed;
|
|
|
|
return printed;
|
|
}
|
|
|
|
static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
|
|
struct syscall_arg *arg)
|
|
{
|
|
unsigned long ptr = arg->val;
|
|
|
|
if (arg->augmented.args)
|
|
return syscall_arg__scnprintf_augmented_string(arg, bf, size);
|
|
|
|
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_comm_tid(struct trace *trace, struct thread *thread, FILE *fp)
|
|
{
|
|
size_t printed = 0;
|
|
|
|
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 size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thread,
|
|
u64 duration, bool duration_calculated, u64 tstamp, FILE *fp)
|
|
{
|
|
size_t printed = 0;
|
|
|
|
if (trace->show_tstamp)
|
|
printed = trace__fprintf_tstamp(trace, tstamp, fp);
|
|
if (trace->show_duration)
|
|
printed += fprintf_duration(duration, duration_calculated, fp);
|
|
return printed + trace__fprintf_comm_tid(trace, thread, fp);
|
|
}
|
|
|
|
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 and /proc/sys/kernel/perf_event_paranoid.\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 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->core.threads, trace__tool_process, false,
|
|
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 struct syscall_arg_fmt syscall_arg_fmts__by_name[] = {
|
|
{ .name = "msr", .scnprintf = SCA_X86_MSR, .strtoul = STUL_X86_MSR, },
|
|
{ .name = "vector", .scnprintf = SCA_X86_IRQ_VECTORS, .strtoul = STUL_X86_IRQ_VECTORS, },
|
|
};
|
|
|
|
static int syscall_arg_fmt__cmp(const void *name, const void *fmtp)
|
|
{
|
|
const struct syscall_arg_fmt *fmt = fmtp;
|
|
return strcmp(name, fmt->name);
|
|
}
|
|
|
|
static struct syscall_arg_fmt *
|
|
__syscall_arg_fmt__find_by_name(struct syscall_arg_fmt *fmts, const int nmemb, const char *name)
|
|
{
|
|
return bsearch(name, fmts, nmemb, sizeof(struct syscall_arg_fmt), syscall_arg_fmt__cmp);
|
|
}
|
|
|
|
static struct syscall_arg_fmt *syscall_arg_fmt__find_by_name(const char *name)
|
|
{
|
|
const int nmemb = ARRAY_SIZE(syscall_arg_fmts__by_name);
|
|
return __syscall_arg_fmt__find_by_name(syscall_arg_fmts__by_name, nmemb, name);
|
|
}
|
|
|
|
static struct tep_format_field *
|
|
syscall_arg_fmt__init_array(struct syscall_arg_fmt *arg, struct tep_format_field *field)
|
|
{
|
|
struct tep_format_field *last_field = NULL;
|
|
int len;
|
|
|
|
for (; field; field = field->next, ++arg) {
|
|
last_field = field;
|
|
|
|
if (arg->scnprintf)
|
|
continue;
|
|
|
|
len = strlen(field->name);
|
|
|
|
if (strcmp(field->type, "const char *") == 0 &&
|
|
((len >= 4 && strcmp(field->name + len - 4, "name") == 0) ||
|
|
strstr(field->name, "path") != NULL))
|
|
arg->scnprintf = SCA_FILENAME;
|
|
else if ((field->flags & TEP_FIELD_IS_POINTER) || strstr(field->name, "addr"))
|
|
arg->scnprintf = SCA_PTR;
|
|
else if (strcmp(field->type, "pid_t") == 0)
|
|
arg->scnprintf = SCA_PID;
|
|
else if (strcmp(field->type, "umode_t") == 0)
|
|
arg->scnprintf = SCA_MODE_T;
|
|
else if ((field->flags & TEP_FIELD_IS_ARRAY) && strstr(field->type, "char")) {
|
|
arg->scnprintf = SCA_CHAR_ARRAY;
|
|
arg->nr_entries = field->arraylen;
|
|
} else if ((strcmp(field->type, "int") == 0 ||
|
|
strcmp(field->type, "unsigned int") == 0 ||
|
|
strcmp(field->type, "long") == 0) &&
|
|
len >= 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
|
|
*/
|
|
arg->scnprintf = SCA_FD;
|
|
} else {
|
|
struct syscall_arg_fmt *fmt = syscall_arg_fmt__find_by_name(field->name);
|
|
|
|
if (fmt) {
|
|
arg->scnprintf = fmt->scnprintf;
|
|
arg->strtoul = fmt->strtoul;
|
|
}
|
|
}
|
|
}
|
|
|
|
return last_field;
|
|
}
|
|
|
|
static int syscall__set_arg_fmts(struct syscall *sc)
|
|
{
|
|
struct tep_format_field *last_field = syscall_arg_fmt__init_array(sc->arg_fmt, sc->args);
|
|
|
|
if (last_field)
|
|
sc->args_size = last_field->offset + last_field->size;
|
|
|
|
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 (trace->syscalls.table == NULL) {
|
|
trace->syscalls.table = calloc(trace->sctbl->syscalls.max_id + 1, sizeof(*sc));
|
|
if (trace->syscalls.table == NULL)
|
|
return -ENOMEM;
|
|
}
|
|
|
|
sc = trace->syscalls.table + id;
|
|
if (sc->nonexistent)
|
|
return 0;
|
|
|
|
if (name == NULL) {
|
|
sc->nonexistent = true;
|
|
return 0;
|
|
}
|
|
|
|
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 -ENOMEM;
|
|
|
|
if (IS_ERR(sc->tp_format))
|
|
return PTR_ERR(sc->tp_format);
|
|
|
|
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");
|
|
sc->is_open = !strcmp(name, "open") || !strcmp(name, "openat");
|
|
|
|
return syscall__set_arg_fmts(sc);
|
|
}
|
|
|
|
static int perf_evsel__init_tp_arg_scnprintf(struct evsel *evsel)
|
|
{
|
|
struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel);
|
|
|
|
if (fmt != NULL) {
|
|
syscall_arg_fmt__init_array(fmt, evsel->tp_format->format.fields);
|
|
return 0;
|
|
}
|
|
|
|
return -ENOMEM;
|
|
}
|
|
|
|
static int intcmp(const void *a, const void *b)
|
|
{
|
|
const int *one = a, *another = b;
|
|
|
|
return *one - *another;
|
|
}
|
|
|
|
static int trace__validate_ev_qualifier(struct trace *trace)
|
|
{
|
|
int err = 0;
|
|
bool printed_invalid_prefix = false;
|
|
struct str_node *pos;
|
|
size_t nr_used = 0, nr_allocated = strlist__nr_entries(trace->ev_qualifier);
|
|
|
|
trace->ev_qualifier_ids.entries = malloc(nr_allocated *
|
|
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;
|
|
}
|
|
|
|
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 (!printed_invalid_prefix) {
|
|
pr_debug("Skipping unknown syscalls: ");
|
|
printed_invalid_prefix = true;
|
|
} else {
|
|
pr_debug(", ");
|
|
}
|
|
|
|
pr_debug("%s", sc);
|
|
continue;
|
|
}
|
|
matches:
|
|
trace->ev_qualifier_ids.entries[nr_used++] = id;
|
|
if (match_next == -1)
|
|
continue;
|
|
|
|
while (1) {
|
|
id = syscalltbl__strglobmatch_next(trace->sctbl, sc, &match_next);
|
|
if (id < 0)
|
|
break;
|
|
if (nr_allocated == nr_used) {
|
|
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.entries[nr_used++] = id;
|
|
}
|
|
}
|
|
|
|
trace->ev_qualifier_ids.nr = nr_used;
|
|
qsort(trace->ev_qualifier_ids.entries, nr_used, sizeof(int), intcmp);
|
|
out:
|
|
if (printed_invalid_prefix)
|
|
pr_debug("\n");
|
|
return err;
|
|
out_free:
|
|
zfree(&trace->ev_qualifier_ids.entries);
|
|
trace->ev_qualifier_ids.nr = 0;
|
|
goto out;
|
|
}
|
|
|
|
static __maybe_unused bool trace__syscall_enabled(struct trace *trace, int id)
|
|
{
|
|
bool in_ev_qualifier;
|
|
|
|
if (trace->ev_qualifier_ids.nr == 0)
|
|
return true;
|
|
|
|
in_ev_qualifier = bsearch(&id, trace->ev_qualifier_ids.entries,
|
|
trace->ev_qualifier_ids.nr, sizeof(int), intcmp) != NULL;
|
|
|
|
if (in_ev_qualifier)
|
|
return !trace->not_ev_qualifier;
|
|
|
|
return trace->not_ev_qualifier;
|
|
}
|
|
|
|
/*
|
|
* 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);
|
|
}
|
|
|
|
/*
|
|
* Check if the value is in fact zero, i.e. mask whatever needs masking, such
|
|
* as mount 'flags' argument that needs ignoring some magic flag, see comment
|
|
* in tools/perf/trace/beauty/mount_flags.c
|
|
*/
|
|
static unsigned long syscall_arg_fmt__mask_val(struct syscall_arg_fmt *fmt, struct syscall_arg *arg, unsigned long val)
|
|
{
|
|
if (fmt && fmt->mask_val)
|
|
return fmt->mask_val(arg, val);
|
|
|
|
return val;
|
|
}
|
|
|
|
static size_t syscall_arg_fmt__scnprintf_val(struct syscall_arg_fmt *fmt, char *bf, size_t size,
|
|
struct syscall_arg *arg, unsigned long val)
|
|
{
|
|
if (fmt && fmt->scnprintf) {
|
|
arg->val = val;
|
|
if (fmt->parm)
|
|
arg->parm = fmt->parm;
|
|
return fmt->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, void *augmented_args, int augmented_args_size,
|
|
struct trace *trace, struct thread *thread)
|
|
{
|
|
size_t printed = 0;
|
|
unsigned long val;
|
|
u8 bit = 1;
|
|
struct syscall_arg arg = {
|
|
.args = args,
|
|
.augmented = {
|
|
.size = augmented_args_size,
|
|
.args = augmented_args,
|
|
},
|
|
.idx = 0,
|
|
.mask = 0,
|
|
.trace = trace,
|
|
.thread = thread,
|
|
.show_string_prefix = trace->show_string_prefix,
|
|
};
|
|
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 tep_format_field *field;
|
|
|
|
for (field = sc->args; field;
|
|
field = field->next, ++arg.idx, bit <<= 1) {
|
|
if (arg.mask & bit)
|
|
continue;
|
|
|
|
arg.fmt = &sc->arg_fmt[arg.idx];
|
|
val = syscall_arg__val(&arg, arg.idx);
|
|
/*
|
|
* Some syscall args need some mask, most don't and
|
|
* return val untouched.
|
|
*/
|
|
val = syscall_arg_fmt__mask_val(&sc->arg_fmt[arg.idx], &arg, val);
|
|
|
|
/*
|
|
* 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 &&
|
|
!trace->show_zeros &&
|
|
!(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", printed ? ", " : "");
|
|
|
|
if (trace->show_arg_names)
|
|
printed += scnprintf(bf + printed, size - printed, "%s: ", field->name);
|
|
|
|
printed += syscall_arg_fmt__scnprintf_val(&sc->arg_fmt[arg.idx],
|
|
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_arg_fmt__scnprintf_val(&sc->arg_fmt[arg.idx], bf + printed, size - printed, &arg, val);
|
|
next_arg:
|
|
++arg.idx;
|
|
bit <<= 1;
|
|
}
|
|
}
|
|
|
|
return printed;
|
|
}
|
|
|
|
typedef int (*tracepoint_handler)(struct trace *trace, struct evsel *evsel,
|
|
union perf_event *event,
|
|
struct perf_sample *sample);
|
|
|
|
static struct syscall *trace__syscall_info(struct trace *trace,
|
|
struct evsel *evsel, int id)
|
|
{
|
|
int err = 0;
|
|
|
|
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;
|
|
}
|
|
|
|
err = -EINVAL;
|
|
|
|
if (id > trace->sctbl->syscalls.max_id)
|
|
goto out_cant_read;
|
|
|
|
if ((trace->syscalls.table == NULL || trace->syscalls.table[id].name == NULL) &&
|
|
(err = trace__read_syscall_info(trace, id)) != 0)
|
|
goto out_cant_read;
|
|
|
|
if (trace->syscalls.table[id].name == NULL) {
|
|
if (trace->syscalls.table[id].nonexistent)
|
|
return NULL;
|
|
goto out_cant_read;
|
|
}
|
|
|
|
return &trace->syscalls.table[id];
|
|
|
|
out_cant_read:
|
|
if (verbose > 0) {
|
|
char sbuf[STRERR_BUFSIZE];
|
|
fprintf(trace->output, "Problems reading syscall %d: %d (%s)", id, -err, str_error_r(-err, sbuf, sizeof(sbuf)));
|
|
if (id <= trace->sctbl->syscalls.max_id && trace->syscalls.table[id].name != NULL)
|
|
fprintf(trace->output, "(%s)", trace->syscalls.table[id].name);
|
|
fputs(" information\n", trace->output);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
struct syscall_stats {
|
|
struct stats stats;
|
|
u64 nr_failures;
|
|
int max_errno;
|
|
u32 *errnos;
|
|
};
|
|
|
|
static void thread__update_stats(struct thread *thread, struct thread_trace *ttrace,
|
|
int id, struct perf_sample *sample, long err, bool errno_summary)
|
|
{
|
|
struct int_node *inode;
|
|
struct syscall_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(*stats));
|
|
if (stats == NULL)
|
|
return;
|
|
|
|
stats->nr_failures = 0;
|
|
stats->max_errno = 0;
|
|
stats->errnos = NULL;
|
|
init_stats(&stats->stats);
|
|
inode->priv = stats;
|
|
}
|
|
|
|
if (ttrace->entry_time && sample->time > ttrace->entry_time)
|
|
duration = sample->time - ttrace->entry_time;
|
|
|
|
update_stats(&stats->stats, duration);
|
|
|
|
if (err < 0) {
|
|
++stats->nr_failures;
|
|
|
|
if (!errno_summary)
|
|
return;
|
|
|
|
err = -err;
|
|
if (err > stats->max_errno) {
|
|
u32 *new_errnos = realloc(stats->errnos, err * sizeof(u32));
|
|
|
|
if (new_errnos) {
|
|
memset(new_errnos + stats->max_errno, 0, (err - stats->max_errno) * sizeof(u32));
|
|
} else {
|
|
pr_debug("Not enough memory for errno stats for thread \"%s\"(%d/%d), results will be incomplete\n",
|
|
thread__comm_str(thread), thread->pid_, thread->tid);
|
|
return;
|
|
}
|
|
|
|
stats->errnos = new_errnos;
|
|
stats->max_errno = err;
|
|
}
|
|
|
|
++stats->errnos[err - 1];
|
|
}
|
|
}
|
|
|
|
static int trace__printf_interrupted_entry(struct trace *trace)
|
|
{
|
|
struct thread_trace *ttrace;
|
|
size_t printed;
|
|
int len;
|
|
|
|
if (trace->failure_only || trace->current == NULL)
|
|
return 0;
|
|
|
|
ttrace = thread__priv(trace->current);
|
|
|
|
if (!ttrace->entry_pending)
|
|
return 0;
|
|
|
|
printed = trace__fprintf_entry_head(trace, trace->current, 0, false, ttrace->entry_time, trace->output);
|
|
printed += len = fprintf(trace->output, "%s)", ttrace->entry_str);
|
|
|
|
if (len < trace->args_alignment - 4)
|
|
printed += fprintf(trace->output, "%-*s", trace->args_alignment - 4 - len, " ");
|
|
|
|
printed += fprintf(trace->output, " ...\n");
|
|
|
|
ttrace->entry_pending = false;
|
|
++trace->nr_events_printed;
|
|
|
|
return printed;
|
|
}
|
|
|
|
static int trace__fprintf_sample(struct trace *trace, struct evsel *evsel,
|
|
struct perf_sample *sample, struct thread *thread)
|
|
{
|
|
int printed = 0;
|
|
|
|
if (trace->print_sample) {
|
|
double ts = (double)sample->time / NSEC_PER_MSEC;
|
|
|
|
printed += fprintf(trace->output, "%22s %10.3f %s %d/%d [%d]\n",
|
|
perf_evsel__name(evsel), ts,
|
|
thread__comm_str(thread),
|
|
sample->pid, sample->tid, sample->cpu);
|
|
}
|
|
|
|
return printed;
|
|
}
|
|
|
|
static void *syscall__augmented_args(struct syscall *sc, struct perf_sample *sample, int *augmented_args_size, int raw_augmented_args_size)
|
|
{
|
|
void *augmented_args = NULL;
|
|
/*
|
|
* For now with BPF raw_augmented we hook into raw_syscalls:sys_enter
|
|
* and there we get all 6 syscall args plus the tracepoint common fields
|
|
* that gets calculated at the start and the syscall_nr (another long).
|
|
* So we check if that is the case and if so don't look after the
|
|
* sc->args_size but always after the full raw_syscalls:sys_enter payload,
|
|
* which is fixed.
|
|
*
|
|
* We'll revisit this later to pass s->args_size to the BPF augmenter
|
|
* (now tools/perf/examples/bpf/augmented_raw_syscalls.c, so that it
|
|
* copies only what we need for each syscall, like what happens when we
|
|
* use syscalls:sys_enter_NAME, so that we reduce the kernel/userspace
|
|
* traffic to just what is needed for each syscall.
|
|
*/
|
|
int args_size = raw_augmented_args_size ?: sc->args_size;
|
|
|
|
*augmented_args_size = sample->raw_size - args_size;
|
|
if (*augmented_args_size > 0)
|
|
augmented_args = sample->raw_data + args_size;
|
|
|
|
return augmented_args;
|
|
}
|
|
|
|
static int trace__sys_enter(struct trace *trace, struct evsel *evsel,
|
|
union perf_event *event __maybe_unused,
|
|
struct perf_sample *sample)
|
|
{
|
|
char *msg;
|
|
void *args;
|
|
int printed = 0;
|
|
struct thread *thread;
|
|
int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
|
|
int augmented_args_size = 0;
|
|
void *augmented_args = NULL;
|
|
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;
|
|
|
|
trace__fprintf_sample(trace, evsel, sample, thread);
|
|
|
|
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);
|
|
/*
|
|
* If this is raw_syscalls.sys_enter, then it always comes with the 6 possible
|
|
* arguments, even if the syscall being handled, say "openat", uses only 4 arguments
|
|
* this breaks syscall__augmented_args() check for augmented args, as we calculate
|
|
* syscall->args_size using each syscalls:sys_enter_NAME tracefs format file,
|
|
* so when handling, say the openat syscall, we end up getting 6 args for the
|
|
* raw_syscalls:sys_enter event, when we expected just 4, we end up mistakenly
|
|
* thinking that the extra 2 u64 args are the augmented filename, so just check
|
|
* here and avoid using augmented syscalls when the evsel is the raw_syscalls one.
|
|
*/
|
|
if (evsel != trace->syscalls.events.sys_enter)
|
|
augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size);
|
|
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, augmented_args, augmented_args_size, trace, thread);
|
|
|
|
if (sc->is_exit) {
|
|
if (!(trace->duration_filter || trace->summary_only || trace->failure_only || trace->min_stack)) {
|
|
int alignment = 0;
|
|
|
|
trace__fprintf_entry_head(trace, thread, 0, false, ttrace->entry_time, trace->output);
|
|
printed = fprintf(trace->output, "%s)", ttrace->entry_str);
|
|
if (trace->args_alignment > printed)
|
|
alignment = trace->args_alignment - printed;
|
|
fprintf(trace->output, "%*s= ?\n", alignment, " ");
|
|
}
|
|
} 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__fprintf_sys_enter(struct trace *trace, struct evsel *evsel,
|
|
struct perf_sample *sample)
|
|
{
|
|
struct thread_trace *ttrace;
|
|
struct thread *thread;
|
|
int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
|
|
struct syscall *sc = trace__syscall_info(trace, evsel, id);
|
|
char msg[1024];
|
|
void *args, *augmented_args = NULL;
|
|
int augmented_args_size;
|
|
|
|
if (sc == NULL)
|
|
return -1;
|
|
|
|
thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
|
|
ttrace = thread__trace(thread, trace->output);
|
|
/*
|
|
* We need to get ttrace just to make sure it is there when syscall__scnprintf_args()
|
|
* and the rest of the beautifiers accessing it via struct syscall_arg touches it.
|
|
*/
|
|
if (ttrace == NULL)
|
|
goto out_put;
|
|
|
|
args = perf_evsel__sc_tp_ptr(evsel, args, sample);
|
|
augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size);
|
|
syscall__scnprintf_args(sc, msg, sizeof(msg), args, augmented_args, augmented_args_size, trace, thread);
|
|
fprintf(trace->output, "%s", msg);
|
|
err = 0;
|
|
out_put:
|
|
thread__put(thread);
|
|
return err;
|
|
}
|
|
|
|
static int trace__resolve_callchain(struct trace *trace, struct evsel *evsel,
|
|
struct perf_sample *sample,
|
|
struct callchain_cursor *cursor)
|
|
{
|
|
struct addr_location al;
|
|
int max_stack = evsel->core.attr.sample_max_stack ?
|
|
evsel->core.attr.sample_max_stack :
|
|
trace->max_stack;
|
|
int err;
|
|
|
|
if (machine__resolve(trace->host, &al, sample) < 0)
|
|
return -1;
|
|
|
|
err = thread__resolve_callchain(al.thread, cursor, evsel, sample, NULL, NULL, max_stack);
|
|
addr_location__put(&al);
|
|
return err;
|
|
}
|
|
|
|
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, symbol_conf.bt_stop_list, trace->output);
|
|
}
|
|
|
|
static const char *errno_to_name(struct evsel *evsel, int err)
|
|
{
|
|
struct perf_env *env = perf_evsel__env(evsel);
|
|
const char *arch_name = perf_env__arch(env);
|
|
|
|
return arch_syscalls__strerrno(arch_name, err);
|
|
}
|
|
|
|
static int trace__sys_exit(struct trace *trace, struct 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, printed = 0;
|
|
int alignment = trace->args_alignment;
|
|
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;
|
|
|
|
trace__fprintf_sample(trace, evsel, sample, thread);
|
|
|
|
ret = perf_evsel__sc_tp_uint(evsel, ret, sample);
|
|
|
|
if (trace->summary)
|
|
thread__update_stats(thread, ttrace, id, sample, ret, trace->errno_summary);
|
|
|
|
if (!trace->fd_path_disabled && sc->is_open && 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 || (ret >= 0 && trace->failure_only))
|
|
goto out;
|
|
|
|
trace__fprintf_entry_head(trace, thread, duration, duration_calculated, ttrace->entry_time, trace->output);
|
|
|
|
if (ttrace->entry_pending) {
|
|
printed = fprintf(trace->output, "%s", ttrace->entry_str);
|
|
} else {
|
|
printed += fprintf(trace->output, " ... [");
|
|
color_fprintf(trace->output, PERF_COLOR_YELLOW, "continued");
|
|
printed += 9;
|
|
printed += fprintf(trace->output, "]: %s()", sc->name);
|
|
}
|
|
|
|
printed++; /* the closing ')' */
|
|
|
|
if (alignment > printed)
|
|
alignment -= printed;
|
|
else
|
|
alignment = 0;
|
|
|
|
fprintf(trace->output, ")%*s= ", alignment, " ");
|
|
|
|
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 = errno_to_name(evsel, -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);
|
|
|
|
/*
|
|
* We only consider an 'event' for the sake of --max-events a non-filtered
|
|
* sys_enter + sys_exit and other tracepoint events.
|
|
*/
|
|
if (++trace->nr_events_printed == trace->max_events && trace->max_events != ULONG_MAX)
|
|
interrupted = true;
|
|
|
|
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 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 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);
|
|
++trace->nr_events_printed;
|
|
}
|
|
|
|
static size_t trace__fprintf_tp_fields(struct trace *trace, struct evsel *evsel, struct perf_sample *sample,
|
|
struct thread *thread, void *augmented_args, int augmented_args_size)
|
|
{
|
|
char bf[2048];
|
|
size_t size = sizeof(bf);
|
|
struct tep_format_field *field = evsel->tp_format->format.fields;
|
|
struct syscall_arg_fmt *arg = __evsel__syscall_arg_fmt(evsel);
|
|
size_t printed = 0;
|
|
unsigned long val;
|
|
u8 bit = 1;
|
|
struct syscall_arg syscall_arg = {
|
|
.augmented = {
|
|
.size = augmented_args_size,
|
|
.args = augmented_args,
|
|
},
|
|
.idx = 0,
|
|
.mask = 0,
|
|
.trace = trace,
|
|
.thread = thread,
|
|
.show_string_prefix = trace->show_string_prefix,
|
|
};
|
|
|
|
for (; field && arg; field = field->next, ++syscall_arg.idx, bit <<= 1, ++arg) {
|
|
if (syscall_arg.mask & bit)
|
|
continue;
|
|
|
|
syscall_arg.len = 0;
|
|
syscall_arg.fmt = arg;
|
|
if (field->flags & TEP_FIELD_IS_ARRAY) {
|
|
int offset = field->offset;
|
|
|
|
if (field->flags & TEP_FIELD_IS_DYNAMIC) {
|
|
offset = format_field__intval(field, sample, evsel->needs_swap);
|
|
syscall_arg.len = offset >> 16;
|
|
offset &= 0xffff;
|
|
}
|
|
|
|
val = (uintptr_t)(sample->raw_data + offset);
|
|
} else
|
|
val = format_field__intval(field, sample, evsel->needs_swap);
|
|
/*
|
|
* Some syscall args need some mask, most don't and
|
|
* return val untouched.
|
|
*/
|
|
val = syscall_arg_fmt__mask_val(arg, &syscall_arg, val);
|
|
|
|
/*
|
|
* 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 &&
|
|
!trace->show_zeros &&
|
|
!((arg->show_zero ||
|
|
arg->scnprintf == SCA_STRARRAY ||
|
|
arg->scnprintf == SCA_STRARRAYS) &&
|
|
arg->parm))
|
|
continue;
|
|
|
|
printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : "");
|
|
|
|
/*
|
|
* XXX Perhaps we should have a show_tp_arg_names,
|
|
* leaving show_arg_names just for syscalls?
|
|
*/
|
|
if (1 || trace->show_arg_names)
|
|
printed += scnprintf(bf + printed, size - printed, "%s: ", field->name);
|
|
|
|
printed += syscall_arg_fmt__scnprintf_val(arg, bf + printed, size - printed, &syscall_arg, val);
|
|
}
|
|
|
|
return printed + fprintf(trace->output, "%s", bf);
|
|
}
|
|
|
|
static int trace__event_handler(struct trace *trace, struct evsel *evsel,
|
|
union perf_event *event __maybe_unused,
|
|
struct perf_sample *sample)
|
|
{
|
|
struct thread *thread;
|
|
int callchain_ret = 0;
|
|
/*
|
|
* Check if we called perf_evsel__disable(evsel) due to, for instance,
|
|
* this event's max_events having been hit and this is an entry coming
|
|
* from the ring buffer that we should discard, since the max events
|
|
* have already been considered/printed.
|
|
*/
|
|
if (evsel->disabled)
|
|
return 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;
|
|
callchain_ret = 1;
|
|
}
|
|
}
|
|
|
|
trace__printf_interrupted_entry(trace);
|
|
trace__fprintf_tstamp(trace, sample->time, trace->output);
|
|
|
|
if (trace->trace_syscalls && trace->show_duration)
|
|
fprintf(trace->output, "( ): ");
|
|
|
|
if (thread)
|
|
trace__fprintf_comm_tid(trace, thread, trace->output);
|
|
|
|
if (evsel == trace->syscalls.events.augmented) {
|
|
int id = perf_evsel__sc_tp_uint(evsel, id, sample);
|
|
struct syscall *sc = trace__syscall_info(trace, evsel, id);
|
|
|
|
if (sc) {
|
|
fprintf(trace->output, "%s(", sc->name);
|
|
trace__fprintf_sys_enter(trace, evsel, sample);
|
|
fputc(')', trace->output);
|
|
goto newline;
|
|
}
|
|
|
|
/*
|
|
* XXX: Not having the associated syscall info or not finding/adding
|
|
* the thread should never happen, but if it does...
|
|
* fall thru and print it as a bpf_output event.
|
|
*/
|
|
}
|
|
|
|
fprintf(trace->output, "%s(", evsel->name);
|
|
|
|
if (perf_evsel__is_bpf_output(evsel)) {
|
|
bpf_output__fprintf(trace, sample);
|
|
} else if (evsel->tp_format) {
|
|
if (strncmp(evsel->tp_format->name, "sys_enter_", 10) ||
|
|
trace__fprintf_sys_enter(trace, evsel, sample)) {
|
|
if (trace->libtraceevent_print) {
|
|
event_format__fprintf(evsel->tp_format, sample->cpu,
|
|
sample->raw_data, sample->raw_size,
|
|
trace->output);
|
|
} else {
|
|
trace__fprintf_tp_fields(trace, evsel, sample, thread, NULL, 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
newline:
|
|
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));
|
|
|
|
++trace->nr_events_printed;
|
|
|
|
if (evsel->max_events != ULONG_MAX && ++evsel->nr_events_printed == evsel->max_events) {
|
|
evsel__disable(evsel);
|
|
evsel__close(evsel);
|
|
}
|
|
out:
|
|
thread__put(thread);
|
|
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 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->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)
|
|
ttrace->pfmaj++;
|
|
else
|
|
ttrace->pfmin++;
|
|
|
|
if (trace->summary_only)
|
|
goto out;
|
|
|
|
thread__find_symbol(thread, sample->cpumode, sample->ip, &al);
|
|
|
|
trace__fprintf_entry_head(trace, thread, 0, true, sample->time, trace->output);
|
|
|
|
fprintf(trace->output, "%sfault [",
|
|
evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ?
|
|
"maj" : "min");
|
|
|
|
print_location(trace->output, sample, &al, false, true);
|
|
|
|
fprintf(trace->output, "] => ");
|
|
|
|
thread__find_symbol(thread, sample->cpumode, sample->addr, &al);
|
|
|
|
if (!al.map) {
|
|
thread__find_symbol(thread, sample->cpumode, 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));
|
|
|
|
++trace->nr_events_printed;
|
|
out:
|
|
err = 0;
|
|
out_put:
|
|
thread__put(thread);
|
|
return err;
|
|
}
|
|
|
|
static void trace__set_base_time(struct trace *trace,
|
|
struct 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->core.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 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",
|
|
};
|
|
pid_t pid = getpid();
|
|
char *filter = asprintf__tp_filter_pids(1, &pid);
|
|
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);
|
|
int err = -1;
|
|
|
|
/* +3 is for the event string below and the pid filter */
|
|
rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 3 +
|
|
majpf_args_nr + minpf_args_nr + argc;
|
|
rec_argv = calloc(rec_argc + 1, sizeof(char *));
|
|
|
|
if (rec_argv == NULL || filter == NULL)
|
|
goto out_free;
|
|
|
|
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");
|
|
goto out_free;
|
|
}
|
|
}
|
|
|
|
rec_argv[j++] = "--filter";
|
|
rec_argv[j++] = filter;
|
|
|
|
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];
|
|
|
|
err = cmd_record(j, rec_argv);
|
|
out_free:
|
|
free(filter);
|
|
free(rec_argv);
|
|
return err;
|
|
}
|
|
|
|
static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp);
|
|
|
|
static bool evlist__add_vfs_getname(struct evlist *evlist)
|
|
{
|
|
bool found = false;
|
|
struct evsel *evsel, *tmp;
|
|
struct parse_events_error err;
|
|
int ret;
|
|
|
|
bzero(&err, sizeof(err));
|
|
ret = parse_events(evlist, "probe:vfs_getname*", &err);
|
|
if (ret) {
|
|
free(err.str);
|
|
free(err.help);
|
|
free(err.first_str);
|
|
free(err.first_help);
|
|
return false;
|
|
}
|
|
|
|
evlist__for_each_entry_safe(evlist, evsel, tmp) {
|
|
if (!strstarts(perf_evsel__name(evsel), "probe:vfs_getname"))
|
|
continue;
|
|
|
|
if (perf_evsel__field(evsel, "pathname")) {
|
|
evsel->handler = trace__vfs_getname;
|
|
found = true;
|
|
continue;
|
|
}
|
|
|
|
list_del_init(&evsel->core.node);
|
|
evsel->evlist = NULL;
|
|
evsel__delete(evsel);
|
|
}
|
|
|
|
return found;
|
|
}
|
|
|
|
static struct evsel *perf_evsel__new_pgfault(u64 config)
|
|
{
|
|
struct 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 = 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 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;
|
|
}
|
|
|
|
if (evswitch__discard(&trace->evswitch, evsel))
|
|
return;
|
|
|
|
trace__set_base_time(trace, evsel, sample);
|
|
|
|
if (evsel->core.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);
|
|
}
|
|
|
|
if (trace->nr_events_printed >= trace->max_events && trace->max_events != ULONG_MAX)
|
|
interrupted = true;
|
|
}
|
|
|
|
static int trace__add_syscall_newtp(struct trace *trace)
|
|
{
|
|
int ret = -1;
|
|
struct evlist *evlist = trace->evlist;
|
|
struct evsel *sys_enter, *sys_exit;
|
|
|
|
sys_enter = perf_evsel__raw_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__raw_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_evsel__config_callchain(sys_enter, &trace->opts, &callchain_param);
|
|
perf_evsel__config_callchain(sys_exit, &trace->opts, &callchain_param);
|
|
|
|
evlist__add(evlist, sys_enter);
|
|
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->core.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:
|
|
evsel__delete_priv(sys_exit);
|
|
out_delete_sys_enter:
|
|
evsel__delete_priv(sys_enter);
|
|
goto out;
|
|
}
|
|
|
|
static int trace__set_ev_qualifier_tp_filter(struct trace *trace)
|
|
{
|
|
int err = -1;
|
|
struct 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;
|
|
}
|
|
|
|
#ifdef HAVE_LIBBPF_SUPPORT
|
|
static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace, const char *name)
|
|
{
|
|
if (trace->bpf_obj == NULL)
|
|
return NULL;
|
|
|
|
return bpf_object__find_program_by_title(trace->bpf_obj, name);
|
|
}
|
|
|
|
static struct bpf_program *trace__find_syscall_bpf_prog(struct trace *trace, struct syscall *sc,
|
|
const char *prog_name, const char *type)
|
|
{
|
|
struct bpf_program *prog;
|
|
|
|
if (prog_name == NULL) {
|
|
char default_prog_name[256];
|
|
scnprintf(default_prog_name, sizeof(default_prog_name), "!syscalls:sys_%s_%s", type, sc->name);
|
|
prog = trace__find_bpf_program_by_title(trace, default_prog_name);
|
|
if (prog != NULL)
|
|
goto out_found;
|
|
if (sc->fmt && sc->fmt->alias) {
|
|
scnprintf(default_prog_name, sizeof(default_prog_name), "!syscalls:sys_%s_%s", type, sc->fmt->alias);
|
|
prog = trace__find_bpf_program_by_title(trace, default_prog_name);
|
|
if (prog != NULL)
|
|
goto out_found;
|
|
}
|
|
goto out_unaugmented;
|
|
}
|
|
|
|
prog = trace__find_bpf_program_by_title(trace, prog_name);
|
|
|
|
if (prog != NULL) {
|
|
out_found:
|
|
return prog;
|
|
}
|
|
|
|
pr_debug("Couldn't find BPF prog \"%s\" to associate with syscalls:sys_%s_%s, not augmenting it\n",
|
|
prog_name, type, sc->name);
|
|
out_unaugmented:
|
|
return trace->syscalls.unaugmented_prog;
|
|
}
|
|
|
|
static void trace__init_syscall_bpf_progs(struct trace *trace, int id)
|
|
{
|
|
struct syscall *sc = trace__syscall_info(trace, NULL, id);
|
|
|
|
if (sc == NULL)
|
|
return;
|
|
|
|
sc->bpf_prog.sys_enter = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_enter : NULL, "enter");
|
|
sc->bpf_prog.sys_exit = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_exit : NULL, "exit");
|
|
}
|
|
|
|
static int trace__bpf_prog_sys_enter_fd(struct trace *trace, int id)
|
|
{
|
|
struct syscall *sc = trace__syscall_info(trace, NULL, id);
|
|
return sc ? bpf_program__fd(sc->bpf_prog.sys_enter) : bpf_program__fd(trace->syscalls.unaugmented_prog);
|
|
}
|
|
|
|
static int trace__bpf_prog_sys_exit_fd(struct trace *trace, int id)
|
|
{
|
|
struct syscall *sc = trace__syscall_info(trace, NULL, id);
|
|
return sc ? bpf_program__fd(sc->bpf_prog.sys_exit) : bpf_program__fd(trace->syscalls.unaugmented_prog);
|
|
}
|
|
|
|
static void trace__init_bpf_map_syscall_args(struct trace *trace, int id, struct bpf_map_syscall_entry *entry)
|
|
{
|
|
struct syscall *sc = trace__syscall_info(trace, NULL, id);
|
|
int arg = 0;
|
|
|
|
if (sc == NULL)
|
|
goto out;
|
|
|
|
for (; arg < sc->nr_args; ++arg) {
|
|
entry->string_args_len[arg] = 0;
|
|
if (sc->arg_fmt[arg].scnprintf == SCA_FILENAME) {
|
|
/* Should be set like strace -s strsize */
|
|
entry->string_args_len[arg] = PATH_MAX;
|
|
}
|
|
}
|
|
out:
|
|
for (; arg < 6; ++arg)
|
|
entry->string_args_len[arg] = 0;
|
|
}
|
|
static int trace__set_ev_qualifier_bpf_filter(struct trace *trace)
|
|
{
|
|
int fd = bpf_map__fd(trace->syscalls.map);
|
|
struct bpf_map_syscall_entry value = {
|
|
.enabled = !trace->not_ev_qualifier,
|
|
};
|
|
int err = 0;
|
|
size_t i;
|
|
|
|
for (i = 0; i < trace->ev_qualifier_ids.nr; ++i) {
|
|
int key = trace->ev_qualifier_ids.entries[i];
|
|
|
|
if (value.enabled) {
|
|
trace__init_bpf_map_syscall_args(trace, key, &value);
|
|
trace__init_syscall_bpf_progs(trace, key);
|
|
}
|
|
|
|
err = bpf_map_update_elem(fd, &key, &value, BPF_EXIST);
|
|
if (err)
|
|
break;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int __trace__init_syscalls_bpf_map(struct trace *trace, bool enabled)
|
|
{
|
|
int fd = bpf_map__fd(trace->syscalls.map);
|
|
struct bpf_map_syscall_entry value = {
|
|
.enabled = enabled,
|
|
};
|
|
int err = 0, key;
|
|
|
|
for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
|
|
if (enabled)
|
|
trace__init_bpf_map_syscall_args(trace, key, &value);
|
|
|
|
err = bpf_map_update_elem(fd, &key, &value, BPF_ANY);
|
|
if (err)
|
|
break;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int trace__init_syscalls_bpf_map(struct trace *trace)
|
|
{
|
|
bool enabled = true;
|
|
|
|
if (trace->ev_qualifier_ids.nr)
|
|
enabled = trace->not_ev_qualifier;
|
|
|
|
return __trace__init_syscalls_bpf_map(trace, enabled);
|
|
}
|
|
|
|
static struct bpf_program *trace__find_usable_bpf_prog_entry(struct trace *trace, struct syscall *sc)
|
|
{
|
|
struct tep_format_field *field, *candidate_field;
|
|
int id;
|
|
|
|
/*
|
|
* We're only interested in syscalls that have a pointer:
|
|
*/
|
|
for (field = sc->args; field; field = field->next) {
|
|
if (field->flags & TEP_FIELD_IS_POINTER)
|
|
goto try_to_find_pair;
|
|
}
|
|
|
|
return NULL;
|
|
|
|
try_to_find_pair:
|
|
for (id = 0; id < trace->sctbl->syscalls.nr_entries; ++id) {
|
|
struct syscall *pair = trace__syscall_info(trace, NULL, id);
|
|
struct bpf_program *pair_prog;
|
|
bool is_candidate = false;
|
|
|
|
if (pair == NULL || pair == sc ||
|
|
pair->bpf_prog.sys_enter == trace->syscalls.unaugmented_prog)
|
|
continue;
|
|
|
|
for (field = sc->args, candidate_field = pair->args;
|
|
field && candidate_field; field = field->next, candidate_field = candidate_field->next) {
|
|
bool is_pointer = field->flags & TEP_FIELD_IS_POINTER,
|
|
candidate_is_pointer = candidate_field->flags & TEP_FIELD_IS_POINTER;
|
|
|
|
if (is_pointer) {
|
|
if (!candidate_is_pointer) {
|
|
// The candidate just doesn't copies our pointer arg, might copy other pointers we want.
|
|
continue;
|
|
}
|
|
} else {
|
|
if (candidate_is_pointer) {
|
|
// The candidate might copy a pointer we don't have, skip it.
|
|
goto next_candidate;
|
|
}
|
|
continue;
|
|
}
|
|
|
|
if (strcmp(field->type, candidate_field->type))
|
|
goto next_candidate;
|
|
|
|
is_candidate = true;
|
|
}
|
|
|
|
if (!is_candidate)
|
|
goto next_candidate;
|
|
|
|
/*
|
|
* Check if the tentative pair syscall augmenter has more pointers, if it has,
|
|
* then it may be collecting that and we then can't use it, as it would collect
|
|
* more than what is common to the two syscalls.
|
|
*/
|
|
if (candidate_field) {
|
|
for (candidate_field = candidate_field->next; candidate_field; candidate_field = candidate_field->next)
|
|
if (candidate_field->flags & TEP_FIELD_IS_POINTER)
|
|
goto next_candidate;
|
|
}
|
|
|
|
pair_prog = pair->bpf_prog.sys_enter;
|
|
/*
|
|
* If the pair isn't enabled, then its bpf_prog.sys_enter will not
|
|
* have been searched for, so search it here and if it returns the
|
|
* unaugmented one, then ignore it, otherwise we'll reuse that BPF
|
|
* program for a filtered syscall on a non-filtered one.
|
|
*
|
|
* For instance, we have "!syscalls:sys_enter_renameat" and that is
|
|
* useful for "renameat2".
|
|
*/
|
|
if (pair_prog == NULL) {
|
|
pair_prog = trace__find_syscall_bpf_prog(trace, pair, pair->fmt ? pair->fmt->bpf_prog_name.sys_enter : NULL, "enter");
|
|
if (pair_prog == trace->syscalls.unaugmented_prog)
|
|
goto next_candidate;
|
|
}
|
|
|
|
pr_debug("Reusing \"%s\" BPF sys_enter augmenter for \"%s\"\n", pair->name, sc->name);
|
|
return pair_prog;
|
|
next_candidate:
|
|
continue;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace)
|
|
{
|
|
int map_enter_fd = bpf_map__fd(trace->syscalls.prog_array.sys_enter),
|
|
map_exit_fd = bpf_map__fd(trace->syscalls.prog_array.sys_exit);
|
|
int err = 0, key;
|
|
|
|
for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
|
|
int prog_fd;
|
|
|
|
if (!trace__syscall_enabled(trace, key))
|
|
continue;
|
|
|
|
trace__init_syscall_bpf_progs(trace, key);
|
|
|
|
// It'll get at least the "!raw_syscalls:unaugmented"
|
|
prog_fd = trace__bpf_prog_sys_enter_fd(trace, key);
|
|
err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY);
|
|
if (err)
|
|
break;
|
|
prog_fd = trace__bpf_prog_sys_exit_fd(trace, key);
|
|
err = bpf_map_update_elem(map_exit_fd, &key, &prog_fd, BPF_ANY);
|
|
if (err)
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Now lets do a second pass looking for enabled syscalls without
|
|
* an augmenter that have a signature that is a superset of another
|
|
* syscall with an augmenter so that we can auto-reuse it.
|
|
*
|
|
* I.e. if we have an augmenter for the "open" syscall that has
|
|
* this signature:
|
|
*
|
|
* int open(const char *pathname, int flags, mode_t mode);
|
|
*
|
|
* I.e. that will collect just the first string argument, then we
|
|
* can reuse it for the 'creat' syscall, that has this signature:
|
|
*
|
|
* int creat(const char *pathname, mode_t mode);
|
|
*
|
|
* and for:
|
|
*
|
|
* int stat(const char *pathname, struct stat *statbuf);
|
|
* int lstat(const char *pathname, struct stat *statbuf);
|
|
*
|
|
* Because the 'open' augmenter will collect the first arg as a string,
|
|
* and leave alone all the other args, which already helps with
|
|
* beautifying 'stat' and 'lstat''s pathname arg.
|
|
*
|
|
* Then, in time, when 'stat' gets an augmenter that collects both
|
|
* first and second arg (this one on the raw_syscalls:sys_exit prog
|
|
* array tail call, then that one will be used.
|
|
*/
|
|
for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
|
|
struct syscall *sc = trace__syscall_info(trace, NULL, key);
|
|
struct bpf_program *pair_prog;
|
|
int prog_fd;
|
|
|
|
if (sc == NULL || sc->bpf_prog.sys_enter == NULL)
|
|
continue;
|
|
|
|
/*
|
|
* For now we're just reusing the sys_enter prog, and if it
|
|
* already has an augmenter, we don't need to find one.
|
|
*/
|
|
if (sc->bpf_prog.sys_enter != trace->syscalls.unaugmented_prog)
|
|
continue;
|
|
|
|
/*
|
|
* Look at all the other syscalls for one that has a signature
|
|
* that is close enough that we can share:
|
|
*/
|
|
pair_prog = trace__find_usable_bpf_prog_entry(trace, sc);
|
|
if (pair_prog == NULL)
|
|
continue;
|
|
|
|
sc->bpf_prog.sys_enter = pair_prog;
|
|
|
|
/*
|
|
* Update the BPF_MAP_TYPE_PROG_SHARED for raw_syscalls:sys_enter
|
|
* with the fd for the program we're reusing:
|
|
*/
|
|
prog_fd = bpf_program__fd(sc->bpf_prog.sys_enter);
|
|
err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY);
|
|
if (err)
|
|
break;
|
|
}
|
|
|
|
|
|
return err;
|
|
}
|
|
|
|
static void trace__delete_augmented_syscalls(struct trace *trace)
|
|
{
|
|
struct evsel *evsel, *tmp;
|
|
|
|
evlist__remove(trace->evlist, trace->syscalls.events.augmented);
|
|
evsel__delete(trace->syscalls.events.augmented);
|
|
trace->syscalls.events.augmented = NULL;
|
|
|
|
evlist__for_each_entry_safe(trace->evlist, tmp, evsel) {
|
|
if (evsel->bpf_obj == trace->bpf_obj) {
|
|
evlist__remove(trace->evlist, evsel);
|
|
evsel__delete(evsel);
|
|
}
|
|
|
|
}
|
|
|
|
bpf_object__close(trace->bpf_obj);
|
|
trace->bpf_obj = NULL;
|
|
}
|
|
#else // HAVE_LIBBPF_SUPPORT
|
|
static int trace__set_ev_qualifier_bpf_filter(struct trace *trace __maybe_unused)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int trace__init_syscalls_bpf_map(struct trace *trace __maybe_unused)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace __maybe_unused,
|
|
const char *name __maybe_unused)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace __maybe_unused)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void trace__delete_augmented_syscalls(struct trace *trace __maybe_unused)
|
|
{
|
|
}
|
|
#endif // HAVE_LIBBPF_SUPPORT
|
|
|
|
static bool trace__only_augmented_syscalls_evsels(struct trace *trace)
|
|
{
|
|
struct evsel *evsel;
|
|
|
|
evlist__for_each_entry(trace->evlist, evsel) {
|
|
if (evsel == trace->syscalls.events.augmented ||
|
|
evsel->bpf_obj == trace->bpf_obj)
|
|
continue;
|
|
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static int trace__set_ev_qualifier_filter(struct trace *trace)
|
|
{
|
|
if (trace->syscalls.map)
|
|
return trace__set_ev_qualifier_bpf_filter(trace);
|
|
if (trace->syscalls.events.sys_enter)
|
|
return trace__set_ev_qualifier_tp_filter(trace);
|
|
return 0;
|
|
}
|
|
|
|
static int bpf_map__set_filter_pids(struct bpf_map *map __maybe_unused,
|
|
size_t npids __maybe_unused, pid_t *pids __maybe_unused)
|
|
{
|
|
int err = 0;
|
|
#ifdef HAVE_LIBBPF_SUPPORT
|
|
bool value = true;
|
|
int map_fd = bpf_map__fd(map);
|
|
size_t i;
|
|
|
|
for (i = 0; i < npids; ++i) {
|
|
err = bpf_map_update_elem(map_fd, &pids[i], &value, BPF_ANY);
|
|
if (err)
|
|
break;
|
|
}
|
|
#endif
|
|
return err;
|
|
}
|
|
|
|
static int trace__set_filter_loop_pids(struct trace *trace)
|
|
{
|
|
unsigned int nr = 1, err;
|
|
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") ||
|
|
strstarts(thread__comm_str(parent), "gnome-terminal")) {
|
|
pids[nr++] = parent->tid;
|
|
break;
|
|
}
|
|
thread = parent;
|
|
}
|
|
|
|
err = perf_evlist__append_tp_filter_pids(trace->evlist, nr, pids);
|
|
if (!err && trace->filter_pids.map)
|
|
err = bpf_map__set_filter_pids(trace->filter_pids.map, nr, pids);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int trace__set_filter_pids(struct trace *trace)
|
|
{
|
|
int err = 0;
|
|
/*
|
|
* 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__append_tp_filter_pids(trace->evlist, trace->filter_pids.nr,
|
|
trace->filter_pids.entries);
|
|
if (!err && trace->filter_pids.map) {
|
|
err = bpf_map__set_filter_pids(trace->filter_pids.map, trace->filter_pids.nr,
|
|
trace->filter_pids.entries);
|
|
}
|
|
} else if (perf_thread_map__pid(trace->evlist->core.threads, 0) == -1) {
|
|
err = trace__set_filter_loop_pids(trace);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int __trace__deliver_event(struct trace *trace, union perf_event *event)
|
|
{
|
|
struct evlist *evlist = trace->evlist;
|
|
struct perf_sample sample;
|
|
int err;
|
|
|
|
err = perf_evlist__parse_sample(evlist, event, &sample);
|
|
if (err)
|
|
fprintf(trace->output, "Can't parse sample, err = %d, skipping...\n", err);
|
|
else
|
|
trace__handle_event(trace, event, &sample);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __trace__flush_events(struct trace *trace)
|
|
{
|
|
u64 first = ordered_events__first_time(&trace->oe.data);
|
|
u64 flush = trace->oe.last - NSEC_PER_SEC;
|
|
|
|
/* Is there some thing to flush.. */
|
|
if (first && first < flush)
|
|
return ordered_events__flush_time(&trace->oe.data, flush);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int trace__flush_events(struct trace *trace)
|
|
{
|
|
return !trace->sort_events ? 0 : __trace__flush_events(trace);
|
|
}
|
|
|
|
static int trace__deliver_event(struct trace *trace, union perf_event *event)
|
|
{
|
|
int err;
|
|
|
|
if (!trace->sort_events)
|
|
return __trace__deliver_event(trace, event);
|
|
|
|
err = perf_evlist__parse_sample_timestamp(trace->evlist, event, &trace->oe.last);
|
|
if (err && err != -1)
|
|
return err;
|
|
|
|
err = ordered_events__queue(&trace->oe.data, event, trace->oe.last, 0);
|
|
if (err)
|
|
return err;
|
|
|
|
return trace__flush_events(trace);
|
|
}
|
|
|
|
static int ordered_events__deliver_event(struct ordered_events *oe,
|
|
struct ordered_event *event)
|
|
{
|
|
struct trace *trace = container_of(oe, struct trace, oe.data);
|
|
|
|
return __trace__deliver_event(trace, event->event);
|
|
}
|
|
|
|
static struct syscall_arg_fmt *perf_evsel__syscall_arg_fmt(struct evsel *evsel, char *arg)
|
|
{
|
|
struct tep_format_field *field;
|
|
struct syscall_arg_fmt *fmt = __evsel__syscall_arg_fmt(evsel);
|
|
|
|
if (evsel->tp_format == NULL || fmt == NULL)
|
|
return NULL;
|
|
|
|
for (field = evsel->tp_format->format.fields; field; field = field->next, ++fmt)
|
|
if (strcmp(field->name, arg) == 0)
|
|
return fmt;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static int trace__expand_filter(struct trace *trace __maybe_unused, struct evsel *evsel)
|
|
{
|
|
char *tok, *left = evsel->filter, *new_filter = evsel->filter;
|
|
|
|
while ((tok = strpbrk(left, "=<>!")) != NULL) {
|
|
char *right = tok + 1, *right_end;
|
|
|
|
if (*right == '=')
|
|
++right;
|
|
|
|
while (isspace(*right))
|
|
++right;
|
|
|
|
if (*right == '\0')
|
|
break;
|
|
|
|
while (!isalpha(*left))
|
|
if (++left == tok) {
|
|
/*
|
|
* Bail out, can't find the name of the argument that is being
|
|
* used in the filter, let it try to set this filter, will fail later.
|
|
*/
|
|
return 0;
|
|
}
|
|
|
|
right_end = right + 1;
|
|
while (isalnum(*right_end) || *right_end == '_' || *right_end == '|')
|
|
++right_end;
|
|
|
|
if (isalpha(*right)) {
|
|
struct syscall_arg_fmt *fmt;
|
|
int left_size = tok - left,
|
|
right_size = right_end - right;
|
|
char arg[128];
|
|
|
|
while (isspace(left[left_size - 1]))
|
|
--left_size;
|
|
|
|
scnprintf(arg, sizeof(arg), "%.*s", left_size, left);
|
|
|
|
fmt = perf_evsel__syscall_arg_fmt(evsel, arg);
|
|
if (fmt == NULL) {
|
|
pr_err("\"%s\" not found in \"%s\", can't set filter \"%s\"\n",
|
|
arg, evsel->name, evsel->filter);
|
|
return -1;
|
|
}
|
|
|
|
pr_debug2("trying to expand \"%s\" \"%.*s\" \"%.*s\" -> ",
|
|
arg, (int)(right - tok), tok, right_size, right);
|
|
|
|
if (fmt->strtoul) {
|
|
u64 val;
|
|
struct syscall_arg syscall_arg = {
|
|
.parm = fmt->parm,
|
|
};
|
|
|
|
if (fmt->strtoul(right, right_size, &syscall_arg, &val)) {
|
|
char *n, expansion[19];
|
|
int expansion_lenght = scnprintf(expansion, sizeof(expansion), "%#" PRIx64, val);
|
|
int expansion_offset = right - new_filter;
|
|
|
|
pr_debug("%s", expansion);
|
|
|
|
if (asprintf(&n, "%.*s%s%s", expansion_offset, new_filter, expansion, right_end) < 0) {
|
|
pr_debug(" out of memory!\n");
|
|
free(new_filter);
|
|
return -1;
|
|
}
|
|
if (new_filter != evsel->filter)
|
|
free(new_filter);
|
|
left = n + expansion_offset + expansion_lenght;
|
|
new_filter = n;
|
|
} else {
|
|
pr_err("\"%.*s\" not found for \"%s\" in \"%s\", can't set filter \"%s\"\n",
|
|
right_size, right, arg, evsel->name, evsel->filter);
|
|
return -1;
|
|
}
|
|
} else {
|
|
pr_err("No resolver (strtoul) for \"%s\" in \"%s\", can't set filter \"%s\"\n",
|
|
arg, evsel->name, evsel->filter);
|
|
return -1;
|
|
}
|
|
|
|
pr_debug("\n");
|
|
} else {
|
|
left = right_end;
|
|
}
|
|
}
|
|
|
|
if (new_filter != evsel->filter) {
|
|
pr_debug("New filter for %s: %s\n", evsel->name, new_filter);
|
|
perf_evsel__set_filter(evsel, new_filter);
|
|
free(new_filter);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int trace__expand_filters(struct trace *trace, struct evsel **err_evsel)
|
|
{
|
|
struct evlist *evlist = trace->evlist;
|
|
struct evsel *evsel;
|
|
|
|
evlist__for_each_entry(evlist, evsel) {
|
|
if (evsel->filter == NULL)
|
|
continue;
|
|
|
|
if (trace__expand_filter(trace, evsel)) {
|
|
*err_evsel = evsel;
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int trace__run(struct trace *trace, int argc, const char **argv)
|
|
{
|
|
struct evlist *evlist = trace->evlist;
|
|
struct 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->raw_augmented_syscalls) {
|
|
if (trace->trace_syscalls && trace__add_syscall_newtp(trace))
|
|
goto out_error_raw_syscalls;
|
|
|
|
if (trace->trace_syscalls)
|
|
trace->vfs_getname = 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_evsel__config_callchain(pgfault_maj, &trace->opts, &callchain_param);
|
|
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_evsel__config_callchain(pgfault_min, &trace->opts, &callchain_param);
|
|
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;
|
|
/*
|
|
* If a global cgroup was set, apply it to all the events without an
|
|
* explicit cgroup. I.e.:
|
|
*
|
|
* trace -G A -e sched:*switch
|
|
*
|
|
* Will set all raw_syscalls:sys_{enter,exit}, pgfault, vfs_getname, etc
|
|
* _and_ sched:sched_switch to the 'A' cgroup, while:
|
|
*
|
|
* trace -e sched:*switch -G A
|
|
*
|
|
* will only set the sched:sched_switch event to the 'A' cgroup, all the
|
|
* other events (raw_syscalls:sys_{enter,exit}, etc are left "without"
|
|
* a cgroup (on the root cgroup, sys wide, etc).
|
|
*
|
|
* Multiple cgroups:
|
|
*
|
|
* trace -G A -e sched:*switch -G B
|
|
*
|
|
* the syscall ones go to the 'A' cgroup, the sched:sched_switch goes
|
|
* to the 'B' cgroup.
|
|
*
|
|
* evlist__set_default_cgroup() grabs a reference of the passed cgroup
|
|
* only for the evsels still without a cgroup, i.e. evsel->cgroup == NULL.
|
|
*/
|
|
if (trace->cgroup)
|
|
evlist__set_default_cgroup(trace->evlist, trace->cgroup);
|
|
|
|
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, &callchain_param);
|
|
|
|
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 = 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;
|
|
}
|
|
|
|
err = trace__set_filter_pids(trace);
|
|
if (err < 0)
|
|
goto out_error_mem;
|
|
|
|
if (trace->syscalls.map)
|
|
trace__init_syscalls_bpf_map(trace);
|
|
|
|
if (trace->syscalls.prog_array.sys_enter)
|
|
trace__init_syscalls_bpf_prog_array_maps(trace);
|
|
|
|
if (trace->ev_qualifier_ids.nr > 0) {
|
|
err = trace__set_ev_qualifier_filter(trace);
|
|
if (err < 0)
|
|
goto out_errno;
|
|
|
|
if (trace->syscalls.events.sys_exit) {
|
|
pr_debug("event qualifier tracepoint filter: %s\n",
|
|
trace->syscalls.events.sys_exit->filter);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If the "close" syscall is not traced, then we will not have the
|
|
* opportunity to, in syscall_arg__scnprintf_close_fd() invalidate the
|
|
* fd->pathname table and were ending up showing the last value set by
|
|
* syscalls opening a pathname and associating it with a descriptor or
|
|
* reading it from /proc/pid/fd/ in cases where that doesn't make
|
|
* sense.
|
|
*
|
|
* So just disable this beautifier (SCA_FD, SCA_FDAT) when 'close' is
|
|
* not in use.
|
|
*/
|
|
trace->fd_path_disabled = !trace__syscall_enabled(trace, syscalltbl__id(trace->sctbl, "close"));
|
|
|
|
err = trace__expand_filters(trace, &evsel);
|
|
if (err)
|
|
goto out_delete_evlist;
|
|
err = perf_evlist__apply_filters(evlist, &evsel);
|
|
if (err < 0)
|
|
goto out_error_apply_filters;
|
|
|
|
if (trace->dump.map)
|
|
bpf_map__fprintf(trace->dump.map, trace->output);
|
|
|
|
err = evlist__mmap(evlist, trace->opts.mmap_pages);
|
|
if (err < 0)
|
|
goto out_error_mmap;
|
|
|
|
if (!target__none(&trace->opts.target) && !trace->opts.initial_delay)
|
|
evlist__enable(evlist);
|
|
|
|
if (forks)
|
|
perf_evlist__start_workload(evlist);
|
|
|
|
if (trace->opts.initial_delay) {
|
|
usleep(trace->opts.initial_delay * 1000);
|
|
evlist__enable(evlist);
|
|
}
|
|
|
|
trace->multiple_threads = perf_thread_map__pid(evlist->core.threads, 0) == -1 ||
|
|
evlist->core.threads->nr > 1 ||
|
|
evlist__first(evlist)->core.attr.inherit;
|
|
|
|
/*
|
|
* Now that we already used evsel->core.attr to ask the kernel to setup the
|
|
* events, lets reuse evsel->core.attr.sample_max_stack as the limit in
|
|
* trace__resolve_callchain(), allowing per-event max-stack settings
|
|
* to override an explicitly set --max-stack global setting.
|
|
*/
|
|
evlist__for_each_entry(evlist, evsel) {
|
|
if (evsel__has_callchain(evsel) &&
|
|
evsel->core.attr.sample_max_stack == 0)
|
|
evsel->core.attr.sample_max_stack = trace->max_stack;
|
|
}
|
|
again:
|
|
before = trace->nr_events;
|
|
|
|
for (i = 0; i < evlist->core.nr_mmaps; i++) {
|
|
union perf_event *event;
|
|
struct mmap *md;
|
|
|
|
md = &evlist->mmap[i];
|
|
if (perf_mmap__read_init(&md->core) < 0)
|
|
continue;
|
|
|
|
while ((event = perf_mmap__read_event(&md->core)) != NULL) {
|
|
++trace->nr_events;
|
|
|
|
err = trace__deliver_event(trace, event);
|
|
if (err)
|
|
goto out_disable;
|
|
|
|
perf_mmap__consume(&md->core);
|
|
|
|
if (interrupted)
|
|
goto out_disable;
|
|
|
|
if (done && !draining) {
|
|
evlist__disable(evlist);
|
|
draining = true;
|
|
}
|
|
}
|
|
perf_mmap__read_done(&md->core);
|
|
}
|
|
|
|
if (trace->nr_events == before) {
|
|
int timeout = done ? 100 : -1;
|
|
|
|
if (!draining && evlist__poll(evlist, timeout) > 0) {
|
|
if (evlist__filter_pollfd(evlist, POLLERR | POLLHUP | POLLNVAL) == 0)
|
|
draining = true;
|
|
|
|
goto again;
|
|
} else {
|
|
if (trace__flush_events(trace))
|
|
goto out_disable;
|
|
}
|
|
} else {
|
|
goto again;
|
|
}
|
|
|
|
out_disable:
|
|
thread__zput(trace->current);
|
|
|
|
evlist__disable(evlist);
|
|
|
|
if (trace->sort_events)
|
|
ordered_events__flush(&trace->oe.data, OE_FLUSH__FINAL);
|
|
|
|
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);
|
|
|
|
evlist__delete(evlist);
|
|
cgroup__put(trace->cgroup);
|
|
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 evsel_str_handler handlers[] = {
|
|
{ "probe:vfs_getname", trace__vfs_getname, },
|
|
};
|
|
struct perf_data data = {
|
|
.path = input_name,
|
|
.mode = PERF_DATA_MODE_READ,
|
|
.force = trace->force,
|
|
};
|
|
struct perf_session *session;
|
|
struct 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 (IS_ERR(session))
|
|
return PTR_ERR(session);
|
|
|
|
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_raw_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_raw_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->core.attr.type == PERF_TYPE_SOFTWARE &&
|
|
(evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ||
|
|
evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
|
|
evsel->core.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 syscall_stats *stats;
|
|
double msecs;
|
|
int syscall;
|
|
)
|
|
{
|
|
struct int_node *source = rb_entry(nd, struct int_node, rb_node);
|
|
struct syscall_stats *stats = source->priv;
|
|
|
|
entry->syscall = source->i;
|
|
entry->stats = stats;
|
|
entry->msecs = stats ? (u64)stats->stats.n * (avg_stats(&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 errors 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 syscall_stats *stats = syscall_stats_entry->stats;
|
|
if (stats) {
|
|
double min = (double)(stats->stats.min) / NSEC_PER_MSEC;
|
|
double max = (double)(stats->stats.max) / NSEC_PER_MSEC;
|
|
double avg = avg_stats(&stats->stats);
|
|
double pct;
|
|
u64 n = (u64)stats->stats.n;
|
|
|
|
pct = avg ? 100.0 * stddev_stats(&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 " %6" PRIu64 " %9.3f %9.3f %9.3f",
|
|
n, stats->nr_failures, syscall_stats_entry->msecs, min, avg);
|
|
printed += fprintf(fp, " %9.3f %9.2f%%\n", max, pct);
|
|
|
|
if (trace->errno_summary && stats->nr_failures) {
|
|
const char *arch_name = perf_env__arch(trace->host->env);
|
|
int e;
|
|
|
|
for (e = 0; e < stats->max_errno; ++e) {
|
|
if (stats->errnos[e] != 0)
|
|
fprintf(fp, "\t\t\t\t%s: %d\n", arch_syscalls__strerrno(arch_name, e + 1), stats->errnos[e]);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
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_from_option(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_default_evsel_handler(struct evlist *evlist, void *handler)
|
|
{
|
|
struct evsel *evsel;
|
|
|
|
evlist__for_each_entry(evlist, evsel) {
|
|
if (evsel->handler == NULL)
|
|
evsel->handler = handler;
|
|
}
|
|
}
|
|
|
|
static void evsel__set_syscall_arg_fmt(struct evsel *evsel, const char *name)
|
|
{
|
|
struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel);
|
|
|
|
if (fmt) {
|
|
struct syscall_fmt *scfmt = syscall_fmt__find(name);
|
|
|
|
if (scfmt) {
|
|
int skip = 0;
|
|
|
|
if (strcmp(evsel->tp_format->format.fields->name, "__syscall_nr") == 0 ||
|
|
strcmp(evsel->tp_format->format.fields->name, "nr") == 0)
|
|
++skip;
|
|
|
|
memcpy(fmt + skip, scfmt->arg, (evsel->tp_format->format.nr_fields - skip) * sizeof(*fmt));
|
|
}
|
|
}
|
|
}
|
|
|
|
static int evlist__set_syscall_tp_fields(struct evlist *evlist)
|
|
{
|
|
struct evsel *evsel;
|
|
|
|
evlist__for_each_entry(evlist, evsel) {
|
|
if (evsel->priv || !evsel->tp_format)
|
|
continue;
|
|
|
|
if (strcmp(evsel->tp_format->system, "syscalls")) {
|
|
perf_evsel__init_tp_arg_scnprintf(evsel);
|
|
continue;
|
|
}
|
|
|
|
if (perf_evsel__init_syscall_tp(evsel))
|
|
return -1;
|
|
|
|
if (!strncmp(evsel->tp_format->name, "sys_enter_", 10)) {
|
|
struct syscall_tp *sc = __evsel__syscall_tp(evsel);
|
|
|
|
if (__tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64)))
|
|
return -1;
|
|
|
|
evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_enter_") - 1);
|
|
} else if (!strncmp(evsel->tp_format->name, "sys_exit_", 9)) {
|
|
struct syscall_tp *sc = __evsel__syscall_tp(evsel);
|
|
|
|
if (__tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap))
|
|
return -1;
|
|
|
|
evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_exit_") - 1);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 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];
|
|
struct syscall_fmt *fmt;
|
|
|
|
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;
|
|
goto do_concat;
|
|
}
|
|
|
|
fmt = syscall_fmt__find_by_alias(s);
|
|
if (fmt != NULL) {
|
|
list = 1;
|
|
s = fmt->name;
|
|
} else {
|
|
path__join(group_name, sizeof(group_name), strace_groups_dir, s);
|
|
if (access(group_name, R_OK) == 0)
|
|
list = 1;
|
|
}
|
|
do_concat:
|
|
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;
|
|
trace->trace_syscalls = true;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
static int trace__parse_cgroups(const struct option *opt, const char *str, int unset)
|
|
{
|
|
struct trace *trace = opt->value;
|
|
|
|
if (!list_empty(&trace->evlist->core.entries))
|
|
return parse_cgroups(opt, str, unset);
|
|
|
|
trace->cgroup = evlist__findnew_cgroup(trace->evlist, str);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct bpf_map *trace__find_bpf_map_by_name(struct trace *trace, const char *name)
|
|
{
|
|
if (trace->bpf_obj == NULL)
|
|
return NULL;
|
|
|
|
return bpf_object__find_map_by_name(trace->bpf_obj, name);
|
|
}
|
|
|
|
static void trace__set_bpf_map_filtered_pids(struct trace *trace)
|
|
{
|
|
trace->filter_pids.map = trace__find_bpf_map_by_name(trace, "pids_filtered");
|
|
}
|
|
|
|
static void trace__set_bpf_map_syscalls(struct trace *trace)
|
|
{
|
|
trace->syscalls.map = trace__find_bpf_map_by_name(trace, "syscalls");
|
|
trace->syscalls.prog_array.sys_enter = trace__find_bpf_map_by_name(trace, "syscalls_sys_enter");
|
|
trace->syscalls.prog_array.sys_exit = trace__find_bpf_map_by_name(trace, "syscalls_sys_exit");
|
|
}
|
|
|
|
static int trace__config(const char *var, const char *value, void *arg)
|
|
{
|
|
struct trace *trace = arg;
|
|
int err = 0;
|
|
|
|
if (!strcmp(var, "trace.add_events")) {
|
|
trace->perfconfig_events = strdup(value);
|
|
if (trace->perfconfig_events == NULL) {
|
|
pr_err("Not enough memory for %s\n", "trace.add_events");
|
|
return -1;
|
|
}
|
|
} else if (!strcmp(var, "trace.show_timestamp")) {
|
|
trace->show_tstamp = perf_config_bool(var, value);
|
|
} else if (!strcmp(var, "trace.show_duration")) {
|
|
trace->show_duration = perf_config_bool(var, value);
|
|
} else if (!strcmp(var, "trace.show_arg_names")) {
|
|
trace->show_arg_names = perf_config_bool(var, value);
|
|
if (!trace->show_arg_names)
|
|
trace->show_zeros = true;
|
|
} else if (!strcmp(var, "trace.show_zeros")) {
|
|
bool new_show_zeros = perf_config_bool(var, value);
|
|
if (!trace->show_arg_names && !new_show_zeros) {
|
|
pr_warning("trace.show_zeros has to be set when trace.show_arg_names=no\n");
|
|
goto out;
|
|
}
|
|
trace->show_zeros = new_show_zeros;
|
|
} else if (!strcmp(var, "trace.show_prefix")) {
|
|
trace->show_string_prefix = perf_config_bool(var, value);
|
|
} else if (!strcmp(var, "trace.no_inherit")) {
|
|
trace->opts.no_inherit = perf_config_bool(var, value);
|
|
} else if (!strcmp(var, "trace.args_alignment")) {
|
|
int args_alignment = 0;
|
|
if (perf_config_int(&args_alignment, var, value) == 0)
|
|
trace->args_alignment = args_alignment;
|
|
} else if (!strcmp(var, "trace.tracepoint_beautifiers")) {
|
|
if (strcasecmp(value, "libtraceevent") == 0)
|
|
trace->libtraceevent_print = true;
|
|
else if (strcasecmp(value, "libbeauty") == 0)
|
|
trace->libtraceevent_print = false;
|
|
}
|
|
out:
|
|
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 = {
|
|
.opts = {
|
|
.target = {
|
|
.uid = UINT_MAX,
|
|
.uses_mmap = true,
|
|
},
|
|
.user_freq = UINT_MAX,
|
|
.user_interval = ULLONG_MAX,
|
|
.no_buffering = true,
|
|
.mmap_pages = UINT_MAX,
|
|
},
|
|
.output = stderr,
|
|
.show_comm = true,
|
|
.show_tstamp = true,
|
|
.show_duration = true,
|
|
.show_arg_names = true,
|
|
.args_alignment = 70,
|
|
.trace_syscalls = false,
|
|
.kernel_syscallchains = false,
|
|
.max_stack = UINT_MAX,
|
|
.max_events = ULONG_MAX,
|
|
};
|
|
const char *map_dump_str = NULL;
|
|
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_CALLBACK(0, "filter", &trace.evlist, "filter",
|
|
"event filter", parse_filter),
|
|
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_from_option),
|
|
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),
|
|
#ifdef HAVE_LIBBPF_SUPPORT
|
|
OPT_STRING(0, "map-dump", &map_dump_str, "BPF map", "BPF map to periodically dump"),
|
|
#endif
|
|
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(0, "failure", &trace.failure_only,
|
|
"Show only syscalls that failed"),
|
|
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_BOOLEAN(0, "errno-summary", &trace.errno_summary,
|
|
"Show errno stats per syscall, use with -s or -S"),
|
|
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, "libtraceevent_print", &trace.libtraceevent_print,
|
|
"Use libtraceevent to print the tracepoint arguments."),
|
|
OPT_BOOLEAN(0, "kernel-syscall-graph", &trace.kernel_syscallchains,
|
|
"Show the kernel callchains on the syscall exit path"),
|
|
OPT_ULONG(0, "max-events", &trace.max_events,
|
|
"Set the maximum number of events to print, exit after that is reached. "),
|
|
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_BOOLEAN(0, "sort-events", &trace.sort_events,
|
|
"Sort batch of events before processing, use if getting out of order events"),
|
|
OPT_BOOLEAN(0, "print-sample", &trace.print_sample,
|
|
"print the PERF_RECORD_SAMPLE PERF_SAMPLE_ info, for debugging"),
|
|
OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout,
|
|
"per thread proc mmap processing timeout in ms"),
|
|
OPT_CALLBACK('G', "cgroup", &trace, "name", "monitor event in cgroup name only",
|
|
trace__parse_cgroups),
|
|
OPT_UINTEGER('D', "delay", &trace.opts.initial_delay,
|
|
"ms to wait before starting measurement after program "
|
|
"start"),
|
|
OPTS_EVSWITCH(&trace.evswitch),
|
|
OPT_END()
|
|
};
|
|
bool __maybe_unused max_stack_user_set = true;
|
|
bool mmap_pages_user_set = true;
|
|
struct evsel *evsel;
|
|
const char * const trace_subcommands[] = { "record", NULL };
|
|
int err = -1;
|
|
char bf[BUFSIZ];
|
|
|
|
signal(SIGSEGV, sighandler_dump_stack);
|
|
signal(SIGFPE, sighandler_dump_stack);
|
|
|
|
trace.evlist = 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;
|
|
}
|
|
|
|
/*
|
|
* Parsing .perfconfig may entail creating a BPF event, that may need
|
|
* to create BPF maps, so bump RLIM_MEMLOCK as the default 64K setting
|
|
* is too small. This affects just this process, not touching the
|
|
* global setting. If it fails we'll get something in 'perf trace -v'
|
|
* to help diagnose the problem.
|
|
*/
|
|
rlimit__bump_memlock();
|
|
|
|
err = perf_config(trace__config, &trace);
|
|
if (err)
|
|
goto out;
|
|
|
|
argc = parse_options_subcommand(argc, argv, trace_options, trace_subcommands,
|
|
trace_usage, PARSE_OPT_STOP_AT_NON_OPTION);
|
|
|
|
/*
|
|
* Here we already passed thru trace__parse_events_option() and it has
|
|
* already figured out if -e syscall_name, if not but if --event
|
|
* foo:bar was used, the user is interested _just_ in those, say,
|
|
* tracepoint events, not in the strace-like syscall-name-based mode.
|
|
*
|
|
* This is important because we need to check if strace-like mode is
|
|
* needed to decided if we should filter out the eBPF
|
|
* __augmented_syscalls__ code, if it is in the mix, say, via
|
|
* .perfconfig trace.add_events, and filter those out.
|
|
*/
|
|
if (!trace.trace_syscalls && !trace.trace_pgfaults &&
|
|
trace.evlist->core.nr_entries == 0 /* Was --events used? */) {
|
|
trace.trace_syscalls = true;
|
|
}
|
|
/*
|
|
* Now that we have --verbose figured out, lets see if we need to parse
|
|
* events from .perfconfig, so that if those events fail parsing, say some
|
|
* BPF program fails, then we'll be able to use --verbose to see what went
|
|
* wrong in more detail.
|
|
*/
|
|
if (trace.perfconfig_events != NULL) {
|
|
struct parse_events_error parse_err;
|
|
|
|
bzero(&parse_err, sizeof(parse_err));
|
|
err = parse_events(trace.evlist, trace.perfconfig_events, &parse_err);
|
|
if (err) {
|
|
parse_events_print_error(&parse_err, trace.perfconfig_events);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if ((nr_cgroups || trace.cgroup) && !trace.opts.target.system_wide) {
|
|
usage_with_options_msg(trace_usage, trace_options,
|
|
"cgroup monitoring only available in system-wide mode");
|
|
}
|
|
|
|
evsel = bpf__setup_output_event(trace.evlist, "__augmented_syscalls__");
|
|
if (IS_ERR(evsel)) {
|
|
bpf__strerror_setup_output_event(trace.evlist, PTR_ERR(evsel), bf, sizeof(bf));
|
|
pr_err("ERROR: Setup trace syscalls enter failed: %s\n", bf);
|
|
goto out;
|
|
}
|
|
|
|
if (evsel) {
|
|
trace.syscalls.events.augmented = evsel;
|
|
|
|
evsel = perf_evlist__find_tracepoint_by_name(trace.evlist, "raw_syscalls:sys_enter");
|
|
if (evsel == NULL) {
|
|
pr_err("ERROR: raw_syscalls:sys_enter not found in the augmented BPF object\n");
|
|
goto out;
|
|
}
|
|
|
|
if (evsel->bpf_obj == NULL) {
|
|
pr_err("ERROR: raw_syscalls:sys_enter not associated to a BPF object\n");
|
|
goto out;
|
|
}
|
|
|
|
trace.bpf_obj = evsel->bpf_obj;
|
|
|
|
/*
|
|
* If we have _just_ the augmenter event but don't have a
|
|
* explicit --syscalls, then assume we want all strace-like
|
|
* syscalls:
|
|
*/
|
|
if (!trace.trace_syscalls && trace__only_augmented_syscalls_evsels(&trace))
|
|
trace.trace_syscalls = true;
|
|
/*
|
|
* So, if we have a syscall augmenter, but trace_syscalls, aka
|
|
* strace-like syscall tracing is not set, then we need to trow
|
|
* away the augmenter, i.e. all the events that were created
|
|
* from that BPF object file.
|
|
*
|
|
* This is more to fix the current .perfconfig trace.add_events
|
|
* style of setting up the strace-like eBPF based syscall point
|
|
* payload augmenter.
|
|
*
|
|
* All this complexity will be avoided by adding an alternative
|
|
* to trace.add_events in the form of
|
|
* trace.bpf_augmented_syscalls, that will be only parsed if we
|
|
* need it.
|
|
*
|
|
* .perfconfig trace.add_events is still useful if we want, for
|
|
* instance, have msr_write.msr in some .perfconfig profile based
|
|
* 'perf trace --config determinism.profile' mode, where for some
|
|
* particular goal/workload type we want a set of events and
|
|
* output mode (with timings, etc) instead of having to add
|
|
* all via the command line.
|
|
*
|
|
* Also --config to specify an alternate .perfconfig file needs
|
|
* to be implemented.
|
|
*/
|
|
if (!trace.trace_syscalls) {
|
|
trace__delete_augmented_syscalls(&trace);
|
|
} else {
|
|
trace__set_bpf_map_filtered_pids(&trace);
|
|
trace__set_bpf_map_syscalls(&trace);
|
|
trace.syscalls.unaugmented_prog = trace__find_bpf_program_by_title(&trace, "!raw_syscalls:unaugmented");
|
|
}
|
|
}
|
|
|
|
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 (map_dump_str) {
|
|
trace.dump.map = trace__find_bpf_map_by_name(&trace, map_dump_str);
|
|
if (trace.dump.map == NULL) {
|
|
pr_err("ERROR: BPF map \"%s\" not found\n", map_dump_str);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
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__max_stack();
|
|
max_stack_user_set = false;
|
|
}
|
|
|
|
#ifdef HAVE_DWARF_UNWIND_SUPPORT
|
|
if ((trace.min_stack || max_stack_user_set) && !callchain_param.enabled) {
|
|
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->core.nr_entries > 0) {
|
|
evlist__set_default_evsel_handler(trace.evlist, trace__event_handler);
|
|
if (evlist__set_syscall_tp_fields(trace.evlist)) {
|
|
perror("failed to set syscalls:* tracepoint fields");
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if (trace.sort_events) {
|
|
ordered_events__init(&trace.oe.data, ordered_events__deliver_event, &trace);
|
|
ordered_events__set_copy_on_queue(&trace.oe.data, true);
|
|
}
|
|
|
|
/*
|
|
* If we are augmenting syscalls, then combine what we put in the
|
|
* __augmented_syscalls__ BPF map with what is in the
|
|
* syscalls:sys_exit_FOO tracepoints, i.e. just like we do without BPF,
|
|
* combining raw_syscalls:sys_enter with raw_syscalls:sys_exit.
|
|
*
|
|
* We'll switch to look at two BPF maps, one for sys_enter and the
|
|
* other for sys_exit when we start augmenting the sys_exit paths with
|
|
* buffers that are being copied from kernel to userspace, think 'read'
|
|
* syscall.
|
|
*/
|
|
if (trace.syscalls.events.augmented) {
|
|
evlist__for_each_entry(trace.evlist, evsel) {
|
|
bool raw_syscalls_sys_exit = strcmp(perf_evsel__name(evsel), "raw_syscalls:sys_exit") == 0;
|
|
|
|
if (raw_syscalls_sys_exit) {
|
|
trace.raw_augmented_syscalls = true;
|
|
goto init_augmented_syscall_tp;
|
|
}
|
|
|
|
if (trace.syscalls.events.augmented->priv == NULL &&
|
|
strstr(perf_evsel__name(evsel), "syscalls:sys_enter")) {
|
|
struct evsel *augmented = trace.syscalls.events.augmented;
|
|
if (perf_evsel__init_augmented_syscall_tp(augmented, evsel) ||
|
|
perf_evsel__init_augmented_syscall_tp_args(augmented))
|
|
goto out;
|
|
/*
|
|
* Augmented is __augmented_syscalls__ BPF_OUTPUT event
|
|
* Above we made sure we can get from the payload the tp fields
|
|
* that we get from syscalls:sys_enter tracefs format file.
|
|
*/
|
|
augmented->handler = trace__sys_enter;
|
|
/*
|
|
* Now we do the same for the *syscalls:sys_enter event so that
|
|
* if we handle it directly, i.e. if the BPF prog returns 0 so
|
|
* as not to filter it, then we'll handle it just like we would
|
|
* for the BPF_OUTPUT one:
|
|
*/
|
|
if (perf_evsel__init_augmented_syscall_tp(evsel, evsel) ||
|
|
perf_evsel__init_augmented_syscall_tp_args(evsel))
|
|
goto out;
|
|
evsel->handler = trace__sys_enter;
|
|
}
|
|
|
|
if (strstarts(perf_evsel__name(evsel), "syscalls:sys_exit_")) {
|
|
struct syscall_tp *sc;
|
|
init_augmented_syscall_tp:
|
|
if (perf_evsel__init_augmented_syscall_tp(evsel, evsel))
|
|
goto out;
|
|
sc = __evsel__syscall_tp(evsel);
|
|
/*
|
|
* For now with BPF raw_augmented we hook into
|
|
* raw_syscalls:sys_enter and there we get all
|
|
* 6 syscall args plus the tracepoint common
|
|
* fields and the syscall_nr (another long).
|
|
* So we check if that is the case and if so
|
|
* don't look after the sc->args_size but
|
|
* always after the full raw_syscalls:sys_enter
|
|
* payload, which is fixed.
|
|
*
|
|
* We'll revisit this later to pass
|
|
* s->args_size to the BPF augmenter (now
|
|
* tools/perf/examples/bpf/augmented_raw_syscalls.c,
|
|
* so that it copies only what we need for each
|
|
* syscall, like what happens when we use
|
|
* syscalls:sys_enter_NAME, so that we reduce
|
|
* the kernel/userspace traffic to just what is
|
|
* needed for each syscall.
|
|
*/
|
|
if (trace.raw_augmented_syscalls)
|
|
trace.raw_augmented_syscalls_args_size = (6 + 1) * sizeof(long) + sc->id.offset;
|
|
perf_evsel__init_augmented_syscall_tp_ret(evsel);
|
|
evsel->handler = trace__sys_exit;
|
|
}
|
|
}
|
|
}
|
|
|
|
if ((argc >= 1) && (strcmp(argv[0], "record") == 0))
|
|
return trace__record(&trace, argc-1, &argv[1]);
|
|
|
|
/* Using just --errno-summary will trigger --summary */
|
|
if (trace.errno_summary && !trace.summary && !trace.summary_only)
|
|
trace.summary_only = true;
|
|
|
|
/* summary_only implies summary option, but don't overwrite summary if set */
|
|
if (trace.summary_only)
|
|
trace.summary = trace.summary_only;
|
|
|
|
if (output_name != NULL) {
|
|
err = trace__open_output(&trace, output_name);
|
|
if (err < 0) {
|
|
perror("failed to create output file");
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
err = evswitch__init(&trace.evswitch, trace.evlist, stderr);
|
|
if (err)
|
|
goto out_close;
|
|
|
|
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:
|
|
zfree(&trace.perfconfig_events);
|
|
return err;
|
|
}
|