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