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Diffstat (limited to '')
| -rw-r--r-- | tools/perf/builtin-trace.c | 5154 |
1 files changed, 5154 insertions, 0 deletions
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c new file mode 100644 index 000000000..8de0d0a74 --- /dev/null +++ b/tools/perf/builtin-trace.c @@ -0,0 +1,5154 @@ +/* + * 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'") + */ + +#include "util/record.h" +#include <traceevent/event-parse.h> +#include <api/fs/tracing_path.h> +#include <bpf/bpf.h> +#include "util/bpf_map.h" +#include "util/rlimit.h" +#include "builtin.h" +#include "util/cgroup.h" +#include "util/color.h" +#include "util/config.h" +#include "util/debug.h" +#include "util/dso.h" +#include "util/env.h" +#include "util/event.h" +#include "util/evsel.h" +#include "util/evsel_fprintf.h" +#include "util/synthetic-events.h" +#include "util/evlist.h" +#include "util/evswitch.h" +#include "util/mmap.h" +#include <subcmd/pager.h> +#include <subcmd/exec-cmd.h> +#include "util/machine.h" +#include "util/map.h" +#include "util/symbol.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 "util/tool.h" +#include "util/util.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 "../perf.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 <linux/zalloc.h> +#include <fcntl.h> +#include <sys/sysmacros.h> + +#include <linux/ctype.h> +#include <perf/mmap.h> + +#ifndef O_CLOEXEC +# define O_CLOEXEC 02000000 +#endif + +#ifndef F_LINUX_SPECIFIC_BASE +# define F_LINUX_SPECIFIC_BASE 1024 +#endif + +#define RAW_SYSCALL_ARGS_NUM 6 + +/* + * strtoul: Go from a string to a value, i.e. for msr: MSR_FS_BASE to 0xc0000100 + */ +struct syscall_arg_fmt { + size_t (*scnprintf)(char *bf, size_t size, struct syscall_arg *arg); + bool (*strtoul)(char *bf, size_t size, struct syscall_arg *arg, u64 *val); + unsigned long (*mask_val)(struct syscall_arg *arg, unsigned long val); + void *parm; + const char *name; + u16 nr_entries; // for arrays + bool show_zero; +}; + +struct syscall_fmt { + const char *name; + const char *alias; + struct { + const char *sys_enter, + *sys_exit; + } bpf_prog_name; + struct syscall_arg_fmt arg[RAW_SYSCALL_ARGS_NUM]; + u8 nr_args; + bool errpid; + bool timeout; + bool hexret; +}; + +struct trace { + struct perf_tool tool; + struct syscalltbl *sctbl; + struct { + struct syscall *table; + struct bpf_map *map; + struct { // per syscall BPF_MAP_TYPE_PROG_ARRAY + struct bpf_map *sys_enter, + *sys_exit; + } prog_array; + struct { + struct evsel *sys_enter, + *sys_exit, + *augmented; + } events; + struct bpf_program *unaugmented_prog; + } syscalls; + struct { + struct bpf_map *map; + } dump; + struct record_opts opts; + struct evlist *evlist; + struct machine *host; + struct thread *current; + struct bpf_object *bpf_obj; + struct cgroup *cgroup; + u64 base_time; + FILE *output; + unsigned long nr_events; + unsigned long nr_events_printed; + unsigned long max_events; + struct evswitch evswitch; + struct strlist *ev_qualifier; + struct { + size_t nr; + int *entries; + } ev_qualifier_ids; + struct { + size_t nr; + pid_t *entries; + struct bpf_map *map; + } filter_pids; + double duration_filter; + double runtime_ms; + struct { + u64 vfs_getname, + proc_getname; + } stats; + unsigned int max_stack; + unsigned int min_stack; + int raw_augmented_syscalls_args_size; + bool raw_augmented_syscalls; + bool fd_path_disabled; + bool sort_events; + bool not_ev_qualifier; + bool live; + bool full_time; + bool sched; + bool multiple_threads; + bool summary; + bool summary_only; + bool errno_summary; + bool failure_only; + bool show_comm; + bool print_sample; + bool show_tool_stats; + bool trace_syscalls; + bool libtraceevent_print; + bool kernel_syscallchains; + s16 args_alignment; + bool show_tstamp; + bool show_duration; + bool show_zeros; + bool show_arg_names; + bool show_string_prefix; + bool force; + bool vfs_getname; + int trace_pgfaults; + char *perfconfig_events; + struct { + struct ordered_events data; + u64 last; + } oe; +}; + +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, int size, int offset, bool needs_swap) +{ + field->offset = offset; + + switch (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 int tp_field__init_uint(struct tp_field *field, struct tep_format_field *format_field, bool needs_swap) +{ + return __tp_field__init_uint(field, format_field->size, format_field->offset, needs_swap); +} + +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, int offset) +{ + field->offset = offset; + field->pointer = tp_field__ptr; + return 0; +} + +static int tp_field__init_ptr(struct tp_field *field, struct tep_format_field *format_field) +{ + return __tp_field__init_ptr(field, format_field->offset); +} + +struct syscall_tp { + struct tp_field id; + union { + struct tp_field args, ret; + }; +}; + +/* + * The evsel->priv as used by 'perf trace' + * sc: for raw_syscalls:sys_{enter,exit} and syscalls:sys_{enter,exit}_SYSCALLNAME + * fmt: for all the other tracepoints + */ +struct evsel_trace { + struct syscall_tp sc; + struct syscall_arg_fmt *fmt; +}; + +static struct evsel_trace *evsel_trace__new(void) +{ + return zalloc(sizeof(struct evsel_trace)); +} + +static void evsel_trace__delete(struct evsel_trace *et) +{ + if (et == NULL) + return; + + zfree(&et->fmt); + free(et); +} + +/* + * Used with raw_syscalls:sys_{enter,exit} and with the + * syscalls:sys_{enter,exit}_SYSCALL tracepoints + */ +static inline struct syscall_tp *__evsel__syscall_tp(struct evsel *evsel) +{ + struct evsel_trace *et = evsel->priv; + + return &et->sc; +} + +static struct syscall_tp *evsel__syscall_tp(struct evsel *evsel) +{ + if (evsel->priv == NULL) { + evsel->priv = evsel_trace__new(); + if (evsel->priv == NULL) + return NULL; + } + + return __evsel__syscall_tp(evsel); +} + +/* + * Used with all the other tracepoints. + */ +static inline struct syscall_arg_fmt *__evsel__syscall_arg_fmt(struct evsel *evsel) +{ + struct evsel_trace *et = evsel->priv; + + return et->fmt; +} + +static struct syscall_arg_fmt *evsel__syscall_arg_fmt(struct evsel *evsel) +{ + struct evsel_trace *et = evsel->priv; + + if (evsel->priv == NULL) { + et = evsel->priv = evsel_trace__new(); + + if (et == NULL) + return NULL; + } + + if (et->fmt == NULL) { + et->fmt = calloc(evsel->tp_format->format.nr_fields, sizeof(struct syscall_arg_fmt)); + if (et->fmt == NULL) + goto out_delete; + } + + return __evsel__syscall_arg_fmt(evsel); + +out_delete: + evsel_trace__delete(evsel->priv); + evsel->priv = NULL; + return NULL; +} + +static int evsel__init_tp_uint_field(struct evsel *evsel, struct tp_field *field, const char *name) +{ + struct tep_format_field *format_field = 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__syscall_tp(evsel);\ + evsel__init_tp_uint_field(evsel, &sc->name, #name); }) + +static int evsel__init_tp_ptr_field(struct evsel *evsel, struct tp_field *field, const char *name) +{ + struct tep_format_field *format_field = 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__syscall_tp(evsel);\ + evsel__init_tp_ptr_field(evsel, &sc->name, #name); }) + +static void evsel__delete_priv(struct evsel *evsel) +{ + zfree(&evsel->priv); + evsel__delete(evsel); +} + +static int evsel__init_syscall_tp(struct evsel *evsel) +{ + struct syscall_tp *sc = evsel__syscall_tp(evsel); + + if (sc != NULL) { + if (evsel__init_tp_uint_field(evsel, &sc->id, "__syscall_nr") && + evsel__init_tp_uint_field(evsel, &sc->id, "nr")) + return -ENOENT; + return 0; + } + + return -ENOMEM; +} + +static int evsel__init_augmented_syscall_tp(struct evsel *evsel, struct evsel *tp) +{ + struct syscall_tp *sc = evsel__syscall_tp(evsel); + + if (sc != NULL) { + struct tep_format_field *syscall_id = evsel__field(tp, "id"); + if (syscall_id == NULL) + syscall_id = evsel__field(tp, "__syscall_nr"); + if (syscall_id == NULL || + __tp_field__init_uint(&sc->id, syscall_id->size, syscall_id->offset, evsel->needs_swap)) + return -EINVAL; + + return 0; + } + + return -ENOMEM; +} + +static int evsel__init_augmented_syscall_tp_args(struct evsel *evsel) +{ + struct syscall_tp *sc = __evsel__syscall_tp(evsel); + + return __tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64)); +} + +static int evsel__init_augmented_syscall_tp_ret(struct evsel *evsel) +{ + struct syscall_tp *sc = __evsel__syscall_tp(evsel); + + return __tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap); +} + +static int evsel__init_raw_syscall_tp(struct evsel *evsel, void *handler) +{ + if (evsel__syscall_tp(evsel) != NULL) { + if (perf_evsel__init_sc_tp_uint_field(evsel, id)) + return -ENOENT; + + evsel->handler = handler; + return 0; + } + + return -ENOMEM; +} + +static struct evsel *perf_evsel__raw_syscall_newtp(const char *direction, void *handler) +{ + struct evsel *evsel = evsel__newtp("raw_syscalls", direction); + + /* older kernel (e.g., RHEL6) use syscalls:{enter,exit} */ + if (IS_ERR(evsel)) + evsel = evsel__newtp("syscalls", direction); + + if (IS_ERR(evsel)) + return NULL; + + if (evsel__init_raw_syscall_tp(evsel, handler)) + goto out_delete; + + return evsel; + +out_delete: + evsel__delete_priv(evsel); + return NULL; +} + +#define perf_evsel__sc_tp_uint(evsel, name, sample) \ + ({ struct syscall_tp *fields = __evsel__syscall_tp(evsel); \ + fields->name.integer(&fields->name, sample); }) + +#define perf_evsel__sc_tp_ptr(evsel, name, sample) \ + ({ struct syscall_tp *fields = __evsel__syscall_tp(evsel); \ + fields->name.pointer(&fields->name, sample); }) + +size_t strarray__scnprintf_suffix(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_suffix, int val) +{ + int idx = val - sa->offset; + + if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) { + size_t printed = scnprintf(bf, size, intfmt, val); + if (show_suffix) + printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix); + return printed; + } + + return scnprintf(bf, size, "%s%s", sa->entries[idx], show_suffix ? sa->prefix : ""); +} + +size_t strarray__scnprintf(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_prefix, int val) +{ + int idx = val - sa->offset; + + if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) { + size_t printed = scnprintf(bf, size, intfmt, val); + if (show_prefix) + printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix); + return printed; + } + + return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", 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->show_string_prefix, arg->val); +} + +static size_t syscall_arg__scnprintf_strarray(char *bf, size_t size, + struct syscall_arg *arg) +{ + return __syscall_arg__scnprintf_strarray(bf, size, "%d", arg); +} + +#define SCA_STRARRAY syscall_arg__scnprintf_strarray + +bool syscall_arg__strtoul_strarray(char *bf, size_t size, struct syscall_arg *arg, u64 *ret) +{ + return strarray__strtoul(arg->parm, bf, size, ret); +} + +bool syscall_arg__strtoul_strarray_flags(char *bf, size_t size, struct syscall_arg *arg, u64 *ret) +{ + return strarray__strtoul_flags(arg->parm, bf, size, ret); +} + +bool syscall_arg__strtoul_strarrays(char *bf, size_t size, struct syscall_arg *arg, u64 *ret) +{ + return strarrays__strtoul(arg->parm, bf, size, ret); +} + +size_t syscall_arg__scnprintf_strarray_flags(char *bf, size_t size, struct syscall_arg *arg) +{ + return strarray__scnprintf_flags(arg->parm, bf, size, arg->show_string_prefix, arg->val); +} + +size_t strarrays__scnprintf(struct strarrays *sas, char *bf, size_t size, const char *intfmt, bool show_prefix, int val) +{ + size_t printed; + int i; + + for (i = 0; i < sas->nr_entries; ++i) { + struct strarray *sa = sas->entries[i]; + int idx = val - sa->offset; + + if (idx >= 0 && idx < sa->nr_entries) { + if (sa->entries[idx] == NULL) + break; + return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]); + } + } + + printed = scnprintf(bf, size, intfmt, val); + if (show_prefix) + printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sas->entries[0]->prefix); + return printed; +} + +bool strarray__strtoul(struct strarray *sa, char *bf, size_t size, u64 *ret) +{ + int i; + + for (i = 0; i < sa->nr_entries; ++i) { + if (sa->entries[i] && strncmp(sa->entries[i], bf, size) == 0 && sa->entries[i][size] == '\0') { + *ret = sa->offset + i; + return true; + } + } + + return false; +} + +bool strarray__strtoul_flags(struct strarray *sa, char *bf, size_t size, u64 *ret) +{ + u64 val = 0; + char *tok = bf, *sep, *end; + + *ret = 0; + + while (size != 0) { + int toklen = size; + + sep = memchr(tok, '|', size); + if (sep != NULL) { + size -= sep - tok + 1; + + end = sep - 1; + while (end > tok && isspace(*end)) + --end; + + toklen = end - tok + 1; + } + + while (isspace(*tok)) + ++tok; + + if (isalpha(*tok) || *tok == '_') { + if (!strarray__strtoul(sa, tok, toklen, &val)) + return false; + } else { + bool is_hexa = tok[0] == 0 && (tok[1] = 'x' || tok[1] == 'X'); + + val = strtoul(tok, NULL, is_hexa ? 16 : 0); + } + + *ret |= (1 << (val - 1)); + + if (sep == NULL) + break; + tok = sep + 1; + } + + return true; +} + +bool strarrays__strtoul(struct strarrays *sas, char *bf, size_t size, u64 *ret) +{ + int i; + + for (i = 0; i < sas->nr_entries; ++i) { + struct strarray *sa = sas->entries[i]; + + if (strarray__strtoul(sa, bf, size, ret)) + return true; + } + + return false; +} + +size_t syscall_arg__scnprintf_strarrays(char *bf, size_t size, + struct syscall_arg *arg) +{ + return strarrays__scnprintf(arg->parm, bf, size, "%d", arg->show_string_prefix, arg->val); +} + +#ifndef AT_FDCWD +#define AT_FDCWD -100 +#endif + +static size_t syscall_arg__scnprintf_fd_at(char *bf, size_t size, + struct syscall_arg *arg) +{ + int fd = arg->val; + const char *prefix = "AT_FD"; + + if (fd == AT_FDCWD) + return scnprintf(bf, size, "%s%s", arg->show_string_prefix ? prefix : "", "CWD"); + + return syscall_arg__scnprintf_fd(bf, size, arg); +} + +#define SCA_FDAT syscall_arg__scnprintf_fd_at + +static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size, + struct syscall_arg *arg); + +#define SCA_CLOSE_FD syscall_arg__scnprintf_close_fd + +size_t syscall_arg__scnprintf_hex(char *bf, size_t size, struct syscall_arg *arg) +{ + return scnprintf(bf, size, "%#lx", arg->val); +} + +size_t syscall_arg__scnprintf_ptr(char *bf, size_t size, struct syscall_arg *arg) +{ + if (arg->val == 0) + return scnprintf(bf, size, "NULL"); + return syscall_arg__scnprintf_hex(bf, size, arg); +} + +size_t syscall_arg__scnprintf_int(char *bf, size_t size, struct syscall_arg *arg) +{ + return scnprintf(bf, size, "%d", arg->val); +} + +size_t syscall_arg__scnprintf_long(char *bf, size_t size, struct syscall_arg *arg) +{ + return scnprintf(bf, size, "%ld", arg->val); +} + +static size_t syscall_arg__scnprintf_char_array(char *bf, size_t size, struct syscall_arg *arg) +{ + // XXX Hey, maybe for sched:sched_switch prev/next comm fields we can + // fill missing comms using thread__set_comm()... + // here or in a special syscall_arg__scnprintf_pid_sched_tp... + return scnprintf(bf, size, "\"%-.*s\"", arg->fmt->nr_entries ?: arg->len, arg->val); +} + +#define SCA_CHAR_ARRAY syscall_arg__scnprintf_char_array + +static const char *bpf_cmd[] = { + "MAP_CREATE", "MAP_LOOKUP_ELEM", "MAP_UPDATE_ELEM", "MAP_DELETE_ELEM", + "MAP_GET_NEXT_KEY", "PROG_LOAD", +}; +static DEFINE_STRARRAY(bpf_cmd, "BPF_"); + +static const char *fsmount_flags[] = { + [1] = "CLOEXEC", +}; +static DEFINE_STRARRAY(fsmount_flags, "FSMOUNT_"); + +#include "trace/beauty/generated/fsconfig_arrays.c" + +static DEFINE_STRARRAY(fsconfig_cmds, "FSCONFIG_"); + +static const char *epoll_ctl_ops[] = { "ADD", "DEL", "MOD", }; +static DEFINE_STRARRAY_OFFSET(epoll_ctl_ops, "EPOLL_CTL_", 1); + +static const char *itimers[] = { "REAL", "VIRTUAL", "PROF", }; +static DEFINE_STRARRAY(itimers, "ITIMER_"); + +static const char *keyctl_options[] = { + "GET_KEYRING_ID", "JOIN_SESSION_KEYRING", "UPDATE", "REVOKE", "CHOWN", + "SETPERM", "DESCRIBE", "CLEAR", "LINK", "UNLINK", "SEARCH", "READ", + "INSTANTIATE", "NEGATE", "SET_REQKEY_KEYRING", "SET_TIMEOUT", + "ASSUME_AUTHORITY", "GET_SECURITY", "SESSION_TO_PARENT", "REJECT", + "INSTANTIATE_IOV", "INVALIDATE", "GET_PERSISTENT", +}; +static DEFINE_STRARRAY(keyctl_options, "KEYCTL_"); + +static const char *whences[] = { "SET", "CUR", "END", +#ifdef SEEK_DATA +"DATA", +#endif +#ifdef SEEK_HOLE +"HOLE", +#endif +}; +static DEFINE_STRARRAY(whences, "SEEK_"); + +static const char *fcntl_cmds[] = { + "DUPFD", "GETFD", "SETFD", "GETFL", "SETFL", "GETLK", "SETLK", + "SETLKW", "SETOWN", "GETOWN", "SETSIG", "GETSIG", "GETLK64", + "SETLK64", "SETLKW64", "SETOWN_EX", "GETOWN_EX", + "GETOWNER_UIDS", +}; +static DEFINE_STRARRAY(fcntl_cmds, "F_"); + +static const char *fcntl_linux_specific_cmds[] = { + "SETLEASE", "GETLEASE", "NOTIFY", [5] = "CANCELLK", "DUPFD_CLOEXEC", + "SETPIPE_SZ", "GETPIPE_SZ", "ADD_SEALS", "GET_SEALS", + "GET_RW_HINT", "SET_RW_HINT", "GET_FILE_RW_HINT", "SET_FILE_RW_HINT", +}; + +static DEFINE_STRARRAY_OFFSET(fcntl_linux_specific_cmds, "F_", F_LINUX_SPECIFIC_BASE); + +static struct strarray *fcntl_cmds_arrays[] = { + &strarray__fcntl_cmds, + &strarray__fcntl_linux_specific_cmds, +}; + +static DEFINE_STRARRAYS(fcntl_cmds_arrays); + +static const char *rlimit_resources[] = { + "CPU", "FSIZE", "DATA", "STACK", "CORE", "RSS", "NPROC", "NOFILE", + "MEMLOCK", "AS", "LOCKS", "SIGPENDING", "MSGQUEUE", "NICE", "RTPRIO", + "RTTIME", +}; +static DEFINE_STRARRAY(rlimit_resources, "RLIMIT_"); + +static const char *sighow[] = { "BLOCK", "UNBLOCK", "SETMASK", }; +static DEFINE_STRARRAY(sighow, "SIG_"); + +static const char *clockid[] = { + "REALTIME", "MONOTONIC", "PROCESS_CPUTIME_ID", "THREAD_CPUTIME_ID", + "MONOTONIC_RAW", "REALTIME_COARSE", "MONOTONIC_COARSE", "BOOTTIME", + "REALTIME_ALARM", "BOOTTIME_ALARM", "SGI_CYCLE", "TAI" +}; +static DEFINE_STRARRAY(clockid, "CLOCK_"); + +static size_t syscall_arg__scnprintf_access_mode(char *bf, size_t size, + struct syscall_arg *arg) +{ + bool show_prefix = arg->show_string_prefix; + const char *suffix = "_OK"; + size_t printed = 0; + int mode = arg->val; + + if (mode == F_OK) /* 0 */ + return scnprintf(bf, size, "F%s", show_prefix ? suffix : ""); +#define P_MODE(n) \ + if (mode & n##_OK) { \ + printed += scnprintf(bf + printed, size - printed, "%s%s", #n, show_prefix ? suffix : ""); \ + mode &= ~n##_OK; \ + } + + P_MODE(R); + P_MODE(W); + P_MODE(X); +#undef P_MODE + + if (mode) + printed += scnprintf(bf + printed, size - printed, "|%#x", mode); + + return printed; +} + +#define SCA_ACCMODE syscall_arg__scnprintf_access_mode + +static size_t syscall_arg__scnprintf_filename(char *bf, size_t size, + struct syscall_arg *arg); + +#define SCA_FILENAME syscall_arg__scnprintf_filename + +static size_t syscall_arg__scnprintf_pipe_flags(char *bf, size_t size, + struct syscall_arg *arg) +{ + bool show_prefix = arg->show_string_prefix; + const char *prefix = "O_"; + int printed = 0, flags = arg->val; + +#define P_FLAG(n) \ + if (flags & O_##n) { \ + printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \ + flags &= ~O_##n; \ + } + + P_FLAG(CLOEXEC); + P_FLAG(NONBLOCK); +#undef P_FLAG + + if (flags) + printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags); + + return printed; +} + +#define SCA_PIPE_FLAGS syscall_arg__scnprintf_pipe_flags + +#ifndef GRND_NONBLOCK +#define GRND_NONBLOCK 0x0001 +#endif +#ifndef GRND_RANDOM +#define GRND_RANDOM 0x0002 +#endif + +static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size, + struct syscall_arg *arg) +{ + bool show_prefix = arg->show_string_prefix; + const char *prefix = "GRND_"; + int printed = 0, flags = arg->val; + +#define P_FLAG(n) \ + if (flags & GRND_##n) { \ + printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \ + flags &= ~GRND_##n; \ + } + + P_FLAG(RANDOM); + P_FLAG(NONBLOCK); +#undef P_FLAG + + if (flags) + printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags); + + return printed; +} + +#define SCA_GETRANDOM_FLAGS syscall_arg__scnprintf_getrandom_flags + +#define STRARRAY(name, array) \ + { .scnprintf = SCA_STRARRAY, \ + .strtoul = STUL_STRARRAY, \ + .parm = &strarray__##array, } + +#define STRARRAY_FLAGS(name, array) \ + { .scnprintf = SCA_STRARRAY_FLAGS, \ + .strtoul = STUL_STRARRAY_FLAGS, \ + .parm = &strarray__##array, } + +#include "trace/beauty/arch_errno_names.c" +#include "trace/beauty/eventfd.c" +#include "trace/beauty/futex_op.c" +#include "trace/beauty/futex_val3.c" +#include "trace/beauty/mmap.c" +#include "trace/beauty/mode_t.c" +#include "trace/beauty/msg_flags.c" +#include "trace/beauty/open_flags.c" +#include "trace/beauty/perf_event_open.c" +#include "trace/beauty/pid.c" +#include "trace/beauty/sched_policy.c" +#include "trace/beauty/seccomp.c" +#include "trace/beauty/signum.c" +#include "trace/beauty/socket_type.c" +#include "trace/beauty/waitid_options.c" + +static struct syscall_fmt syscall_fmts[] = { + { .name = "access", + .arg = { [1] = { .scnprintf = SCA_ACCMODE, /* mode */ }, }, }, + { .name = "arch_prctl", + .arg = { [0] = { .scnprintf = SCA_X86_ARCH_PRCTL_CODE, /* code */ }, + [1] = { .scnprintf = SCA_PTR, /* arg2 */ }, }, }, + { .name = "bind", + .arg = { [0] = { .scnprintf = SCA_INT, /* fd */ }, + [1] = { .scnprintf = SCA_SOCKADDR, /* umyaddr */ }, + [2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, }, + { .name = "bpf", + .arg = { [0] = STRARRAY(cmd, bpf_cmd), }, }, + { .name = "brk", .hexret = true, + .arg = { [0] = { .scnprintf = SCA_PTR, /* brk */ }, }, }, + { .name = "clock_gettime", + .arg = { [0] = STRARRAY(clk_id, clockid), }, }, + { .name = "clone", .errpid = true, .nr_args = 5, + .arg = { [0] = { .name = "flags", .scnprintf = SCA_CLONE_FLAGS, }, + [1] = { .name = "child_stack", .scnprintf = SCA_HEX, }, + [2] = { .name = "parent_tidptr", .scnprintf = SCA_HEX, }, + [3] = { .name = "child_tidptr", .scnprintf = SCA_HEX, }, + [4] = { .name = "tls", .scnprintf = SCA_HEX, }, }, }, + { .name = "close", + .arg = { [0] = { .scnprintf = SCA_CLOSE_FD, /* fd */ }, }, }, + { .name = "connect", + .arg = { [0] = { .scnprintf = SCA_INT, /* fd */ }, + [1] = { .scnprintf = SCA_SOCKADDR, /* servaddr */ }, + [2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, }, + { .name = "epoll_ctl", + .arg = { [1] = STRARRAY(op, epoll_ctl_ops), }, }, + { .name = "eventfd2", + .arg = { [1] = { .scnprintf = SCA_EFD_FLAGS, /* flags */ }, }, }, + { .name = "fchmodat", + .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, + { .name = "fchownat", + .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, + { .name = "fcntl", + .arg = { [1] = { .scnprintf = SCA_FCNTL_CMD, /* cmd */ + .strtoul = STUL_STRARRAYS, + .parm = &strarrays__fcntl_cmds_arrays, + .show_zero = true, }, + [2] = { .scnprintf = SCA_FCNTL_ARG, /* arg */ }, }, }, + { .name = "flock", + .arg = { [1] = { .scnprintf = SCA_FLOCK, /* cmd */ }, }, }, + { .name = "fsconfig", + .arg = { [1] = STRARRAY(cmd, fsconfig_cmds), }, }, + { .name = "fsmount", + .arg = { [1] = STRARRAY_FLAGS(flags, fsmount_flags), + [2] = { .scnprintf = SCA_FSMOUNT_ATTR_FLAGS, /* attr_flags */ }, }, }, + { .name = "fspick", + .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, + [1] = { .scnprintf = SCA_FILENAME, /* path */ }, + [2] = { .scnprintf = SCA_FSPICK_FLAGS, /* flags */ }, }, }, + { .name = "fstat", .alias = "newfstat", }, + { .name = "fstatat", .alias = "newfstatat", }, + { .name = "futex", + .arg = { [1] = { .scnprintf = SCA_FUTEX_OP, /* op */ }, + [5] = { .scnprintf = SCA_FUTEX_VAL3, /* val3 */ }, }, }, + { .name = "futimesat", + .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, + { .name = "getitimer", + .arg = { [0] = STRARRAY(which, itimers), }, }, + { .name = "getpid", .errpid = true, }, + { .name = "getpgid", .errpid = true, }, + { .name = "getppid", .errpid = true, }, + { .name = "getrandom", + .arg = { [2] = { .scnprintf = SCA_GETRANDOM_FLAGS, /* flags */ }, }, }, + { .name = "getrlimit", + .arg = { [0] = STRARRAY(resource, rlimit_resources), }, }, + { .name = "gettid", .errpid = true, }, + { .name = "ioctl", + .arg = { +#if defined(__i386__) || defined(__x86_64__) +/* + * FIXME: Make this available to all arches. + */ + [1] = { .scnprintf = SCA_IOCTL_CMD, /* cmd */ }, + [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, }, +#else + [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, }, +#endif + { .name = "kcmp", .nr_args = 5, + .arg = { [0] = { .name = "pid1", .scnprintf = SCA_PID, }, + [1] = { .name = "pid2", .scnprintf = SCA_PID, }, + [2] = { .name = "type", .scnprintf = SCA_KCMP_TYPE, }, + [3] = { .name = "idx1", .scnprintf = SCA_KCMP_IDX, }, + [4] = { .name = "idx2", .scnprintf = SCA_KCMP_IDX, }, }, }, + { .name = "keyctl", + .arg = { [0] = STRARRAY(option, keyctl_options), }, }, + { .name = "kill", + .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, + { .name = "linkat", + .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, + { .name = "lseek", + .arg = { [2] = STRARRAY(whence, whences), }, }, + { .name = "lstat", .alias = "newlstat", }, + { .name = "madvise", + .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, + [2] = { .scnprintf = SCA_MADV_BHV, /* behavior */ }, }, }, + { .name = "mkdirat", + .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, + { .name = "mknodat", + .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, + { .name = "mmap", .hexret = true, +/* The standard mmap maps to old_mmap on s390x */ +#if defined(__s390x__) + .alias = "old_mmap", +#endif + .arg = { [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, + [3] = { .scnprintf = SCA_MMAP_FLAGS, /* flags */ + .strtoul = STUL_STRARRAY_FLAGS, + .parm = &strarray__mmap_flags, }, + [5] = { .scnprintf = SCA_HEX, /* offset */ }, }, }, + { .name = "mount", + .arg = { [0] = { .scnprintf = SCA_FILENAME, /* dev_name */ }, + [3] = { .scnprintf = SCA_MOUNT_FLAGS, /* flags */ + .mask_val = SCAMV_MOUNT_FLAGS, /* flags */ }, }, }, + { .name = "move_mount", + .arg = { [0] = { .scnprintf = SCA_FDAT, /* from_dfd */ }, + [1] = { .scnprintf = SCA_FILENAME, /* from_pathname */ }, + [2] = { .scnprintf = SCA_FDAT, /* to_dfd */ }, + [3] = { .scnprintf = SCA_FILENAME, /* to_pathname */ }, + [4] = { .scnprintf = SCA_MOVE_MOUNT_FLAGS, /* flags */ }, }, }, + { .name = "mprotect", + .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, + [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, }, }, + { .name = "mq_unlink", + .arg = { [0] = { .scnprintf = SCA_FILENAME, /* u_name */ }, }, }, + { .name = "mremap", .hexret = true, + .arg = { [3] = { .scnprintf = SCA_MREMAP_FLAGS, /* flags */ }, }, }, + { .name = "name_to_handle_at", + .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, + { .name = "newfstatat", + .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, + { .name = "open", + .arg = { [1] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, + { .name = "open_by_handle_at", + .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, + [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, + { .name = "openat", + .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, + [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, + { .name = "perf_event_open", + .arg = { [2] = { .scnprintf = SCA_INT, /* cpu */ }, + [3] = { .scnprintf = SCA_FD, /* group_fd */ }, + [4] = { .scnprintf = SCA_PERF_FLAGS, /* flags */ }, }, }, + { .name = "pipe2", + .arg = { [1] = { .scnprintf = SCA_PIPE_FLAGS, /* flags */ }, }, }, + { .name = "pkey_alloc", + .arg = { [1] = { .scnprintf = SCA_PKEY_ALLOC_ACCESS_RIGHTS, /* access_rights */ }, }, }, + { .name = "pkey_free", + .arg = { [0] = { .scnprintf = SCA_INT, /* key */ }, }, }, + { .name = "pkey_mprotect", + .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, + [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, + [3] = { .scnprintf = SCA_INT, /* pkey */ }, }, }, + { .name = "poll", .timeout = true, }, + { .name = "ppoll", .timeout = true, }, + { .name = "prctl", + .arg = { [0] = { .scnprintf = SCA_PRCTL_OPTION, /* option */ + .strtoul = STUL_STRARRAY, + .parm = &strarray__prctl_options, }, + [1] = { .scnprintf = SCA_PRCTL_ARG2, /* arg2 */ }, + [2] = { .scnprintf = SCA_PRCTL_ARG3, /* arg3 */ }, }, }, + { .name = "pread", .alias = "pread64", }, + { .name = "preadv", .alias = "pread", }, + { .name = "prlimit64", + .arg = { [1] = STRARRAY(resource, rlimit_resources), }, }, + { .name = "pwrite", .alias = "pwrite64", }, + { .name = "readlinkat", + .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, + { .name = "recvfrom", + .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, + { .name = "recvmmsg", + .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, + { .name = "recvmsg", + .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, + { .name = "renameat", + .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ }, + [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, }, }, + { .name = "renameat2", + .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ }, + [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, + [4] = { .scnprintf = SCA_RENAMEAT2_FLAGS, /* flags */ }, }, }, + { .name = "rt_sigaction", + .arg = { [0] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, + { .name = "rt_sigprocmask", + .arg = { [0] = STRARRAY(how, sighow), }, }, + { .name = "rt_sigqueueinfo", + .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, + { .name = "rt_tgsigqueueinfo", + .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, + { .name = "sched_setscheduler", + .arg = { [1] = { .scnprintf = SCA_SCHED_POLICY, /* policy */ }, }, }, + { .name = "seccomp", + .arg = { [0] = { .scnprintf = SCA_SECCOMP_OP, /* op */ }, + [1] = { .scnprintf = SCA_SECCOMP_FLAGS, /* flags */ }, }, }, + { .name = "select", .timeout = true, }, + { .name = "sendfile", .alias = "sendfile64", }, + { .name = "sendmmsg", + .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, + { .name = "sendmsg", + .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, + { .name = "sendto", + .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, + [4] = { .scnprintf = SCA_SOCKADDR, /* addr */ }, }, }, + { .name = "set_tid_address", .errpid = true, }, + { .name = "setitimer", + .arg = { [0] = STRARRAY(which, itimers), }, }, + { .name = "setrlimit", + .arg = { [0] = STRARRAY(resource, rlimit_resources), }, }, + { .name = "socket", + .arg = { [0] = STRARRAY(family, socket_families), + [1] = { .scnprintf = SCA_SK_TYPE, /* type */ }, + [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, }, + { .name = "socketpair", + .arg = { [0] = STRARRAY(family, socket_families), + [1] = { .scnprintf = SCA_SK_TYPE, /* type */ }, + [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, }, + { .name = "stat", .alias = "newstat", }, + { .name = "statx", + .arg = { [0] = { .scnprintf = SCA_FDAT, /* fdat */ }, + [2] = { .scnprintf = SCA_STATX_FLAGS, /* flags */ } , + [3] = { .scnprintf = SCA_STATX_MASK, /* mask */ }, }, }, + { .name = "swapoff", + .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, }, + { .name = "swapon", + .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, }, + { .name = "symlinkat", + .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, + { .name = "sync_file_range", + .arg = { [3] = { .scnprintf = SCA_SYNC_FILE_RANGE_FLAGS, /* flags */ }, }, }, + { .name = "tgkill", + .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, + { .name = "tkill", + .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, + { .name = "umount2", .alias = "umount", + .arg = { [0] = { .scnprintf = SCA_FILENAME, /* name */ }, }, }, + { .name = "uname", .alias = "newuname", }, + { .name = "unlinkat", + .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, + { .name = "utimensat", + .arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ }, }, }, + { .name = "wait4", .errpid = true, + .arg = { [2] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, }, + { .name = "waitid", .errpid = true, + .arg = { [3] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, }, +}; + +static int syscall_fmt__cmp(const void *name, const void *fmtp) +{ + const struct syscall_fmt *fmt = fmtp; + return strcmp(name, fmt->name); +} + +static struct syscall_fmt *__syscall_fmt__find(struct syscall_fmt *fmts, const int nmemb, const char *name) +{ + return bsearch(name, fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp); +} + +static struct syscall_fmt *syscall_fmt__find(const char *name) +{ + const int nmemb = ARRAY_SIZE(syscall_fmts); + return __syscall_fmt__find(syscall_fmts, nmemb, name); +} + +static struct syscall_fmt *__syscall_fmt__find_by_alias(struct syscall_fmt *fmts, const int nmemb, const char *alias) +{ + int i; + + for (i = 0; i < nmemb; ++i) { + if (fmts[i].alias && strcmp(fmts[i].alias, alias) == 0) + return &fmts[i]; + } + + return NULL; +} + +static struct syscall_fmt *syscall_fmt__find_by_alias(const char *alias) +{ + const int nmemb = ARRAY_SIZE(syscall_fmts); + return __syscall_fmt__find_by_alias(syscall_fmts, nmemb, alias); +} + +/* + * is_exit: is this "exit" or "exit_group"? + * is_open: is this "open" or "openat"? To associate the fd returned in sys_exit with the pathname in sys_enter. + * args_size: sum of the sizes of the syscall arguments, anything after that is augmented stuff: pathname for openat, etc. + * nonexistent: Just a hole in the syscall table, syscall id not allocated + */ +struct syscall { + struct tep_event *tp_format; + int nr_args; + int args_size; + struct { + struct bpf_program *sys_enter, + *sys_exit; + } bpf_prog; + bool is_exit; + bool is_open; + bool nonexistent; + struct tep_format_field *args; + const char *name; + struct syscall_fmt *fmt; + struct syscall_arg_fmt *arg_fmt; +}; + +/* + * Must match what is in the BPF program: + * + * tools/perf/examples/bpf/augmented_raw_syscalls.c + */ +struct bpf_map_syscall_entry { + bool enabled; + u16 string_args_len[RAW_SYSCALL_ARGS_NUM]; +}; + +/* + * We need to have this 'calculated' boolean because in some cases we really + * don't know what is the duration of a syscall, for instance, when we start + * a session and some threads are waiting for a syscall to finish, say 'poll', + * in which case all we can do is to print "( ? ) for duration and for the + * start timestamp. + */ +static size_t fprintf_duration(unsigned long t, bool calculated, FILE *fp) +{ + double duration = (double)t / NSEC_PER_MSEC; + size_t printed = fprintf(fp, "("); + + if (!calculated) + printed += fprintf(fp, " "); + else if (duration >= 1.0) + printed += color_fprintf(fp, PERF_COLOR_RED, "%6.3f ms", duration); + else if (duration >= 0.01) + printed += color_fprintf(fp, PERF_COLOR_YELLOW, "%6.3f ms", duration); + else + printed += color_fprintf(fp, PERF_COLOR_NORMAL, "%6.3f ms", duration); + return printed + fprintf(fp, "): "); +} + +/** + * filename.ptr: The filename char pointer that will be vfs_getname'd + * filename.entry_str_pos: Where to insert the string translated from + * filename.ptr by the vfs_getname tracepoint/kprobe. + * ret_scnprintf: syscall args may set this to a different syscall return + * formatter, for instance, fcntl may return fds, file flags, etc. + */ +struct thread_trace { + u64 entry_time; + bool entry_pending; + unsigned long nr_events; + unsigned long pfmaj, pfmin; + char *entry_str; + double runtime_ms; + size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg); + struct { + unsigned long ptr; + short int entry_str_pos; + bool pending_open; + unsigned int namelen; + char *name; + } filename; + struct { + int max; + struct file *table; + } files; + + struct intlist *syscall_stats; +}; + +static struct thread_trace *thread_trace__new(void) +{ + struct thread_trace *ttrace = zalloc(sizeof(struct thread_trace)); + + if (ttrace) { + ttrace->files.max = -1; + ttrace->syscall_stats = intlist__new(NULL); + } + + return ttrace; +} + +static struct thread_trace *thread__trace(struct thread *thread, FILE *fp) +{ + struct thread_trace *ttrace; + + if (thread == NULL) + goto fail; + + if (thread__priv(thread) == NULL) + thread__set_priv(thread, thread_trace__new()); + + if (thread__priv(thread) == NULL) + goto fail; + + ttrace = thread__priv(thread); + ++ttrace->nr_events; + + return ttrace; +fail: + color_fprintf(fp, PERF_COLOR_RED, + "WARNING: not enough memory, dropping samples!\n"); + return NULL; +} + + +void syscall_arg__set_ret_scnprintf(struct syscall_arg *arg, + size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg)) +{ + struct thread_trace *ttrace = thread__priv(arg->thread); + + ttrace->ret_scnprintf = ret_scnprintf; +} + +#define TRACE_PFMAJ (1 << 0) +#define TRACE_PFMIN (1 << 1) + +static const size_t trace__entry_str_size = 2048; + +static struct file *thread_trace__files_entry(struct thread_trace *ttrace, int fd) +{ + if (fd < 0) + return NULL; + + if (fd > ttrace->files.max) { + struct file *nfiles = realloc(ttrace->files.table, (fd + 1) * sizeof(struct file)); + + if (nfiles == NULL) + return NULL; + + if (ttrace->files.max != -1) { + memset(nfiles + ttrace->files.max + 1, 0, + (fd - ttrace->files.max) * sizeof(struct file)); + } else { + memset(nfiles, 0, (fd + 1) * sizeof(struct file)); + } + + ttrace->files.table = nfiles; + ttrace->files.max = fd; + } + + return ttrace->files.table + fd; +} + +struct file *thread__files_entry(struct thread *thread, int fd) +{ + return thread_trace__files_entry(thread__priv(thread), fd); +} + +static int trace__set_fd_pathname(struct thread *thread, int fd, const char *pathname) +{ + struct thread_trace *ttrace = thread__priv(thread); + struct file *file = thread_trace__files_entry(ttrace, fd); + + if (file != NULL) { + struct stat st; + if (stat(pathname, &st) == 0) + file->dev_maj = major(st.st_rdev); + file->pathname = strdup(pathname); + if (file->pathname) + return 0; + } + + return -1; +} + +static int thread__read_fd_path(struct thread *thread, int fd) +{ + char linkname[PATH_MAX], pathname[PATH_MAX]; + struct stat st; + int ret; + + if (thread->pid_ == thread->tid) { + scnprintf(linkname, sizeof(linkname), + "/proc/%d/fd/%d", thread->pid_, fd); + } else { + scnprintf(linkname, sizeof(linkname), + "/proc/%d/task/%d/fd/%d", thread->pid_, thread->tid, fd); + } + + if (lstat(linkname, &st) < 0 || st.st_size + 1 > (off_t)sizeof(pathname)) + return -1; + + ret = readlink(linkname, pathname, sizeof(pathname)); + + if (ret < 0 || ret > st.st_size) + return -1; + + pathname[ret] = '\0'; + return trace__set_fd_pathname(thread, fd, pathname); +} + +static const char *thread__fd_path(struct thread *thread, int fd, + struct trace *trace) +{ + struct thread_trace *ttrace = thread__priv(thread); + + if (ttrace == NULL || trace->fd_path_disabled) + return NULL; + + if (fd < 0) + return NULL; + + if ((fd > ttrace->files.max || ttrace->files.table[fd].pathname == NULL)) { + if (!trace->live) + return NULL; + ++trace->stats.proc_getname; + if (thread__read_fd_path(thread, fd)) + return NULL; + } + + return ttrace->files.table[fd].pathname; +} + +size_t syscall_arg__scnprintf_fd(char *bf, size_t size, struct syscall_arg *arg) +{ + int fd = arg->val; + size_t printed = scnprintf(bf, size, "%d", fd); + const char *path = thread__fd_path(arg->thread, fd, arg->trace); + + if (path) + printed += scnprintf(bf + printed, size - printed, "<%s>", path); + + return printed; +} + +size_t pid__scnprintf_fd(struct trace *trace, pid_t pid, int fd, char *bf, size_t size) +{ + size_t printed = scnprintf(bf, size, "%d", fd); + struct thread *thread = machine__find_thread(trace->host, pid, pid); + + if (thread) { + const char *path = thread__fd_path(thread, fd, trace); + + if (path) + printed += scnprintf(bf + printed, size - printed, "<%s>", path); + + thread__put(thread); + } + + return printed; +} + +static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size, + struct syscall_arg *arg) +{ + int fd = arg->val; + size_t printed = syscall_arg__scnprintf_fd(bf, size, arg); + struct thread_trace *ttrace = thread__priv(arg->thread); + + if (ttrace && fd >= 0 && fd <= ttrace->files.max) + zfree(&ttrace->files.table[fd].pathname); + + return printed; +} + +static void thread__set_filename_pos(struct thread *thread, const char *bf, + unsigned long ptr) +{ + struct thread_trace *ttrace = thread__priv(thread); + + ttrace->filename.ptr = ptr; + ttrace->filename.entry_str_pos = bf - ttrace->entry_str; +} + +static size_t syscall_arg__scnprintf_augmented_string(struct syscall_arg *arg, char *bf, size_t size) +{ + struct augmented_arg *augmented_arg = arg->augmented.args; + size_t printed = scnprintf(bf, size, "\"%.*s\"", augmented_arg->size, augmented_arg->value); + /* + * So that the next arg with a payload can consume its augmented arg, i.e. for rename* syscalls + * we would have two strings, each prefixed by its size. + */ + int consumed = sizeof(*augmented_arg) + augmented_arg->size; + + arg->augmented.args = ((void *)arg->augmented.args) + consumed; + arg->augmented.size -= consumed; + + return printed; +} + +static size_t syscall_arg__scnprintf_filename(char *bf, size_t size, + struct syscall_arg *arg) +{ + unsigned long ptr = arg->val; + + if (arg->augmented.args) + return syscall_arg__scnprintf_augmented_string(arg, bf, size); + + if (!arg->trace->vfs_getname) + return scnprintf(bf, size, "%#x", ptr); + + thread__set_filename_pos(arg->thread, bf, ptr); + return 0; +} + +static bool trace__filter_duration(struct trace *trace, double t) +{ + return t < (trace->duration_filter * NSEC_PER_MSEC); +} + +static size_t __trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp) +{ + double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC; + + return fprintf(fp, "%10.3f ", ts); +} + +/* + * We're handling tstamp=0 as an undefined tstamp, i.e. like when we are + * using ttrace->entry_time for a thread that receives a sys_exit without + * first having received a sys_enter ("poll" issued before tracing session + * starts, lost sys_enter exit due to ring buffer overflow). + */ +static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp) +{ + if (tstamp > 0) + return __trace__fprintf_tstamp(trace, tstamp, fp); + + return fprintf(fp, " ? "); +} + +static bool done = false; +static bool interrupted = false; + +static void sig_handler(int sig) +{ + done = true; + interrupted = sig == SIGINT; +} + +static size_t trace__fprintf_comm_tid(struct trace *trace, struct thread *thread, FILE *fp) +{ + size_t printed = 0; + + if (trace->multiple_threads) { + if (trace->show_comm) + printed += fprintf(fp, "%.14s/", thread__comm_str(thread)); + printed += fprintf(fp, "%d ", thread->tid); + } + + return printed; +} + +static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thread, + u64 duration, bool duration_calculated, u64 tstamp, FILE *fp) +{ + size_t printed = 0; + + if (trace->show_tstamp) + printed = trace__fprintf_tstamp(trace, tstamp, fp); + if (trace->show_duration) + printed += fprintf_duration(duration, duration_calculated, fp); + return printed + trace__fprintf_comm_tid(trace, thread, fp); +} + +static int trace__process_event(struct trace *trace, struct machine *machine, + union perf_event *event, struct perf_sample *sample) +{ + int ret = 0; + + switch (event->header.type) { + case PERF_RECORD_LOST: + color_fprintf(trace->output, PERF_COLOR_RED, + "LOST %" PRIu64 " events!\n", event->lost.lost); + ret = machine__process_lost_event(machine, event, sample); + break; + default: + ret = machine__process_event(machine, event, sample); + break; + } + + return ret; +} + +static int trace__tool_process(struct perf_tool *tool, + union perf_event *event, + struct perf_sample *sample, + struct machine *machine) +{ + struct trace *trace = container_of(tool, struct trace, tool); + return trace__process_event(trace, machine, event, sample); +} + +static char *trace__machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp) +{ + struct machine *machine = vmachine; + + if (machine->kptr_restrict_warned) + return NULL; + + if (symbol_conf.kptr_restrict) { + pr_warning("Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n" + "Check /proc/sys/kernel/kptr_restrict and /proc/sys/kernel/perf_event_paranoid.\n\n" + "Kernel samples will not be resolved.\n"); + machine->kptr_restrict_warned = true; + return NULL; + } + + return machine__resolve_kernel_addr(vmachine, addrp, modp); +} + +static int trace__symbols_init(struct trace *trace, struct evlist *evlist) +{ + int err = symbol__init(NULL); + + if (err) + return err; + + trace->host = machine__new_host(); + if (trace->host == NULL) + return -ENOMEM; + + err = trace_event__register_resolver(trace->host, trace__machine__resolve_kernel_addr); + if (err < 0) + goto out; + + err = __machine__synthesize_threads(trace->host, &trace->tool, &trace->opts.target, + evlist->core.threads, trace__tool_process, false, + 1); +out: + if (err) + symbol__exit(); + + return err; +} + +static void trace__symbols__exit(struct trace *trace) +{ + machine__exit(trace->host); + trace->host = NULL; + + symbol__exit(); +} + +static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args) +{ + int idx; + + if (nr_args == RAW_SYSCALL_ARGS_NUM && sc->fmt && sc->fmt->nr_args != 0) + nr_args = sc->fmt->nr_args; + + sc->arg_fmt = calloc(nr_args, sizeof(*sc->arg_fmt)); + if (sc->arg_fmt == NULL) + return -1; + + for (idx = 0; idx < nr_args; ++idx) { + if (sc->fmt) + sc->arg_fmt[idx] = sc->fmt->arg[idx]; + } + + sc->nr_args = nr_args; + return 0; +} + +static struct syscall_arg_fmt syscall_arg_fmts__by_name[] = { + { .name = "msr", .scnprintf = SCA_X86_MSR, .strtoul = STUL_X86_MSR, }, + { .name = "vector", .scnprintf = SCA_X86_IRQ_VECTORS, .strtoul = STUL_X86_IRQ_VECTORS, }, +}; + +static int syscall_arg_fmt__cmp(const void *name, const void *fmtp) +{ + const struct syscall_arg_fmt *fmt = fmtp; + return strcmp(name, fmt->name); +} + +static struct syscall_arg_fmt * +__syscall_arg_fmt__find_by_name(struct syscall_arg_fmt *fmts, const int nmemb, const char *name) +{ + return bsearch(name, fmts, nmemb, sizeof(struct syscall_arg_fmt), syscall_arg_fmt__cmp); +} + +static struct syscall_arg_fmt *syscall_arg_fmt__find_by_name(const char *name) +{ + const int nmemb = ARRAY_SIZE(syscall_arg_fmts__by_name); + return __syscall_arg_fmt__find_by_name(syscall_arg_fmts__by_name, nmemb, name); +} + +static struct tep_format_field * +syscall_arg_fmt__init_array(struct syscall_arg_fmt *arg, struct tep_format_field *field) +{ + struct tep_format_field *last_field = NULL; + int len; + + for (; field; field = field->next, ++arg) { + last_field = field; + + if (arg->scnprintf) + continue; + + len = strlen(field->name); + + if (strcmp(field->type, "const char *") == 0 && + ((len >= 4 && strcmp(field->name + len - 4, "name") == 0) || + strstr(field->name, "path") != NULL)) + arg->scnprintf = SCA_FILENAME; + else if ((field->flags & TEP_FIELD_IS_POINTER) || strstr(field->name, "addr")) + arg->scnprintf = SCA_PTR; + else if (strcmp(field->type, "pid_t") == 0) + arg->scnprintf = SCA_PID; + else if (strcmp(field->type, "umode_t") == 0) + arg->scnprintf = SCA_MODE_T; + else if ((field->flags & TEP_FIELD_IS_ARRAY) && strstr(field->type, "char")) { + arg->scnprintf = SCA_CHAR_ARRAY; + arg->nr_entries = field->arraylen; + } else if ((strcmp(field->type, "int") == 0 || + strcmp(field->type, "unsigned int") == 0 || + strcmp(field->type, "long") == 0) && + len >= 2 && strcmp(field->name + len - 2, "fd") == 0) { + /* + * /sys/kernel/tracing/events/syscalls/sys_enter* + * egrep 'field:.*fd;' .../format|sed -r 's/.*field:([a-z ]+) [a-z_]*fd.+/\1/g'|sort|uniq -c + * 65 int + * 23 unsigned int + * 7 unsigned long + */ + arg->scnprintf = SCA_FD; + } else { + struct syscall_arg_fmt *fmt = syscall_arg_fmt__find_by_name(field->name); + + if (fmt) { + arg->scnprintf = fmt->scnprintf; + arg->strtoul = fmt->strtoul; + } + } + } + + return last_field; +} + +static int syscall__set_arg_fmts(struct syscall *sc) +{ + struct tep_format_field *last_field = syscall_arg_fmt__init_array(sc->arg_fmt, sc->args); + + if (last_field) + sc->args_size = last_field->offset + last_field->size; + + return 0; +} + +static int trace__read_syscall_info(struct trace *trace, int id) +{ + char tp_name[128]; + struct syscall *sc; + const char *name = syscalltbl__name(trace->sctbl, id); + +#ifdef HAVE_SYSCALL_TABLE_SUPPORT + if (trace->syscalls.table == NULL) { + trace->syscalls.table = calloc(trace->sctbl->syscalls.max_id + 1, sizeof(*sc)); + if (trace->syscalls.table == NULL) + return -ENOMEM; + } +#else + if (id > trace->sctbl->syscalls.max_id || (id == 0 && trace->syscalls.table == NULL)) { + // When using libaudit we don't know beforehand what is the max syscall id + struct syscall *table = realloc(trace->syscalls.table, (id + 1) * sizeof(*sc)); + + if (table == NULL) + return -ENOMEM; + + // Need to memset from offset 0 and +1 members if brand new + if (trace->syscalls.table == NULL) + memset(table, 0, (id + 1) * sizeof(*sc)); + else + memset(table + trace->sctbl->syscalls.max_id + 1, 0, (id - trace->sctbl->syscalls.max_id) * sizeof(*sc)); + + trace->syscalls.table = table; + trace->sctbl->syscalls.max_id = id; + } +#endif + sc = trace->syscalls.table + id; + if (sc->nonexistent) + return -EEXIST; + + if (name == NULL) { + sc->nonexistent = true; + return -EEXIST; + } + + 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); + } + + /* + * Fails to read trace point format via sysfs node, so the trace point + * doesn't exist. Set the 'nonexistent' flag as true. + */ + if (IS_ERR(sc->tp_format)) { + sc->nonexistent = true; + return PTR_ERR(sc->tp_format); + } + + if (syscall__alloc_arg_fmts(sc, IS_ERR(sc->tp_format) ? + RAW_SYSCALL_ARGS_NUM : sc->tp_format->format.nr_fields)) + return -ENOMEM; + + sc->args = sc->tp_format->format.fields; + /* + * We need to check and discard the first variable '__syscall_nr' + * or 'nr' that mean the syscall number. It is needless here. + * So drop '__syscall_nr' or 'nr' field but does not exist on older kernels. + */ + if (sc->args && (!strcmp(sc->args->name, "__syscall_nr") || !strcmp(sc->args->name, "nr"))) { + sc->args = sc->args->next; + --sc->nr_args; + } + + sc->is_exit = !strcmp(name, "exit_group") || !strcmp(name, "exit"); + sc->is_open = !strcmp(name, "open") || !strcmp(name, "openat"); + + return syscall__set_arg_fmts(sc); +} + +static int evsel__init_tp_arg_scnprintf(struct evsel *evsel) +{ + struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel); + + if (fmt != NULL) { + syscall_arg_fmt__init_array(fmt, evsel->tp_format->format.fields); + return 0; + } + + return -ENOMEM; +} + +static int intcmp(const void *a, const void *b) +{ + const int *one = a, *another = b; + + return *one - *another; +} + +static int trace__validate_ev_qualifier(struct trace *trace) +{ + int err = 0; + bool printed_invalid_prefix = false; + struct str_node *pos; + size_t nr_used = 0, nr_allocated = strlist__nr_entries(trace->ev_qualifier); + + trace->ev_qualifier_ids.entries = malloc(nr_allocated * + sizeof(trace->ev_qualifier_ids.entries[0])); + + if (trace->ev_qualifier_ids.entries == NULL) { + fputs("Error:\tNot enough memory for allocating events qualifier ids\n", + trace->output); + err = -EINVAL; + goto out; + } + + strlist__for_each_entry(pos, trace->ev_qualifier) { + const char *sc = pos->s; + int id = syscalltbl__id(trace->sctbl, sc), match_next = -1; + + if (id < 0) { + id = syscalltbl__strglobmatch_first(trace->sctbl, sc, &match_next); + if (id >= 0) + goto matches; + + if (!printed_invalid_prefix) { + pr_debug("Skipping unknown syscalls: "); + printed_invalid_prefix = true; + } else { + pr_debug(", "); + } + + pr_debug("%s", sc); + continue; + } +matches: + trace->ev_qualifier_ids.entries[nr_used++] = id; + if (match_next == -1) + continue; + + while (1) { + id = syscalltbl__strglobmatch_next(trace->sctbl, sc, &match_next); + if (id < 0) + break; + if (nr_allocated == nr_used) { + void *entries; + + nr_allocated += 8; + entries = realloc(trace->ev_qualifier_ids.entries, + nr_allocated * sizeof(trace->ev_qualifier_ids.entries[0])); + if (entries == NULL) { + err = -ENOMEM; + fputs("\nError:\t Not enough memory for parsing\n", trace->output); + goto out_free; + } + trace->ev_qualifier_ids.entries = entries; + } + trace->ev_qualifier_ids.entries[nr_used++] = id; + } + } + + trace->ev_qualifier_ids.nr = nr_used; + qsort(trace->ev_qualifier_ids.entries, nr_used, sizeof(int), intcmp); +out: + if (printed_invalid_prefix) + pr_debug("\n"); + return err; +out_free: + zfree(&trace->ev_qualifier_ids.entries); + trace->ev_qualifier_ids.nr = 0; + goto out; +} + +static __maybe_unused bool trace__syscall_enabled(struct trace *trace, int id) +{ + bool in_ev_qualifier; + + if (trace->ev_qualifier_ids.nr == 0) + return true; + + in_ev_qualifier = bsearch(&id, trace->ev_qualifier_ids.entries, + trace->ev_qualifier_ids.nr, sizeof(int), intcmp) != NULL; + + if (in_ev_qualifier) + return !trace->not_ev_qualifier; + + return trace->not_ev_qualifier; +} + +/* + * args is to be interpreted as a series of longs but we need to handle + * 8-byte unaligned accesses. args points to raw_data within the event + * and raw_data is guaranteed to be 8-byte unaligned because it is + * preceded by raw_size which is a u32. So we need to copy args to a temp + * variable to read it. Most notably this avoids extended load instructions + * on unaligned addresses + */ +unsigned long syscall_arg__val(struct syscall_arg *arg, u8 idx) +{ + unsigned long val; + unsigned char *p = arg->args + sizeof(unsigned long) * idx; + + memcpy(&val, p, sizeof(val)); + return val; +} + +static size_t syscall__scnprintf_name(struct syscall *sc, char *bf, size_t size, + struct syscall_arg *arg) +{ + if (sc->arg_fmt && sc->arg_fmt[arg->idx].name) + return scnprintf(bf, size, "%s: ", sc->arg_fmt[arg->idx].name); + + return scnprintf(bf, size, "arg%d: ", arg->idx); +} + +/* + * Check if the value is in fact zero, i.e. mask whatever needs masking, such + * as mount 'flags' argument that needs ignoring some magic flag, see comment + * in tools/perf/trace/beauty/mount_flags.c + */ +static unsigned long syscall_arg_fmt__mask_val(struct syscall_arg_fmt *fmt, struct syscall_arg *arg, unsigned long val) +{ + if (fmt && fmt->mask_val) + return fmt->mask_val(arg, val); + + return val; +} + +static size_t syscall_arg_fmt__scnprintf_val(struct syscall_arg_fmt *fmt, char *bf, size_t size, + struct syscall_arg *arg, unsigned long val) +{ + if (fmt && fmt->scnprintf) { + arg->val = val; + if (fmt->parm) + arg->parm = fmt->parm; + return fmt->scnprintf(bf, size, arg); + } + return scnprintf(bf, size, "%ld", val); +} + +static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size, + unsigned char *args, void *augmented_args, int augmented_args_size, + struct trace *trace, struct thread *thread) +{ + size_t printed = 0; + unsigned long val; + u8 bit = 1; + struct syscall_arg arg = { + .args = args, + .augmented = { + .size = augmented_args_size, + .args = augmented_args, + }, + .idx = 0, + .mask = 0, + .trace = trace, + .thread = thread, + .show_string_prefix = trace->show_string_prefix, + }; + struct thread_trace *ttrace = thread__priv(thread); + + /* + * Things like fcntl will set this in its 'cmd' formatter to pick the + * right formatter for the return value (an fd? file flags?), which is + * not needed for syscalls that always return a given type, say an fd. + */ + ttrace->ret_scnprintf = NULL; + + if (sc->args != NULL) { + struct tep_format_field *field; + + for (field = sc->args; field; + field = field->next, ++arg.idx, bit <<= 1) { + if (arg.mask & bit) + continue; + + arg.fmt = &sc->arg_fmt[arg.idx]; + val = syscall_arg__val(&arg, arg.idx); + /* + * Some syscall args need some mask, most don't and + * return val untouched. + */ + val = syscall_arg_fmt__mask_val(&sc->arg_fmt[arg.idx], &arg, val); + + /* + * Suppress this argument if its value is zero and + * and we don't have a string associated in an + * strarray for it. + */ + if (val == 0 && + !trace->show_zeros && + !(sc->arg_fmt && + (sc->arg_fmt[arg.idx].show_zero || + sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAY || + sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAYS) && + sc->arg_fmt[arg.idx].parm)) + continue; + + printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : ""); + + if (trace->show_arg_names) + printed += scnprintf(bf + printed, size - printed, "%s: ", field->name); + + printed += syscall_arg_fmt__scnprintf_val(&sc->arg_fmt[arg.idx], + bf + printed, size - printed, &arg, val); + } + } else if (IS_ERR(sc->tp_format)) { + /* + * If we managed to read the tracepoint /format file, then we + * may end up not having any args, like with gettid(), so only + * print the raw args when we didn't manage to read it. + */ + while (arg.idx < sc->nr_args) { + if (arg.mask & bit) + goto next_arg; + val = syscall_arg__val(&arg, arg.idx); + if (printed) + printed += scnprintf(bf + printed, size - printed, ", "); + printed += syscall__scnprintf_name(sc, bf + printed, size - printed, &arg); + printed += syscall_arg_fmt__scnprintf_val(&sc->arg_fmt[arg.idx], bf + printed, size - printed, &arg, val); +next_arg: + ++arg.idx; + bit <<= 1; + } + } + + return printed; +} + +typedef int (*tracepoint_handler)(struct trace *trace, struct evsel *evsel, + union perf_event *event, + struct perf_sample *sample); + +static struct syscall *trace__syscall_info(struct trace *trace, + struct evsel *evsel, int id) +{ + int err = 0; + + if (id < 0) { + + /* + * XXX: Noticed on x86_64, reproduced as far back as 3.0.36, haven't tried + * before that, leaving at a higher verbosity level till that is + * explained. Reproduced with plain ftrace with: + * + * echo 1 > /t/events/raw_syscalls/sys_exit/enable + * grep "NR -1 " /t/trace_pipe + * + * After generating some load on the machine. + */ + if (verbose > 1) { + static u64 n; + fprintf(trace->output, "Invalid syscall %d id, skipping (%s, %" PRIu64 ") ...\n", + id, evsel__name(evsel), ++n); + } + return NULL; + } + + err = -EINVAL; + +#ifdef HAVE_SYSCALL_TABLE_SUPPORT + if (id > trace->sctbl->syscalls.max_id) { +#else + if (id >= trace->sctbl->syscalls.max_id) { + /* + * With libaudit we don't know beforehand what is the max_id, + * so we let trace__read_syscall_info() figure that out as we + * go on reading syscalls. + */ + err = trace__read_syscall_info(trace, id); + if (err) +#endif + goto out_cant_read; + } + + if ((trace->syscalls.table == NULL || trace->syscalls.table[id].name == NULL) && + (err = trace__read_syscall_info(trace, id)) != 0) + goto out_cant_read; + + if (trace->syscalls.table && trace->syscalls.table[id].nonexistent) + goto out_cant_read; + + return &trace->syscalls.table[id]; + +out_cant_read: + if (verbose > 0) { + char sbuf[STRERR_BUFSIZE]; + fprintf(trace->output, "Problems reading syscall %d: %d (%s)", id, -err, str_error_r(-err, sbuf, sizeof(sbuf))); + if (id <= trace->sctbl->syscalls.max_id && trace->syscalls.table[id].name != NULL) + fprintf(trace->output, "(%s)", trace->syscalls.table[id].name); + fputs(" information\n", trace->output); + } + return NULL; +} + +struct syscall_stats { + struct stats stats; + u64 nr_failures; + int max_errno; + u32 *errnos; +}; + +static void thread__update_stats(struct thread *thread, struct thread_trace *ttrace, + int id, struct perf_sample *sample, long err, bool errno_summary) +{ + struct int_node *inode; + struct syscall_stats *stats; + u64 duration = 0; + + inode = intlist__findnew(ttrace->syscall_stats, id); + if (inode == NULL) + return; + + stats = inode->priv; + if (stats == NULL) { + stats = malloc(sizeof(*stats)); + if (stats == NULL) + return; + + stats->nr_failures = 0; + stats->max_errno = 0; + stats->errnos = NULL; + init_stats(&stats->stats); + inode->priv = stats; + } + + if (ttrace->entry_time && sample->time > ttrace->entry_time) + duration = sample->time - ttrace->entry_time; + + update_stats(&stats->stats, duration); + + if (err < 0) { + ++stats->nr_failures; + + if (!errno_summary) + return; + + err = -err; + if (err > stats->max_errno) { + u32 *new_errnos = realloc(stats->errnos, err * sizeof(u32)); + + if (new_errnos) { + memset(new_errnos + stats->max_errno, 0, (err - stats->max_errno) * sizeof(u32)); + } else { + pr_debug("Not enough memory for errno stats for thread \"%s\"(%d/%d), results will be incomplete\n", + thread__comm_str(thread), thread->pid_, thread->tid); + return; + } + + stats->errnos = new_errnos; + stats->max_errno = err; + } + + ++stats->errnos[err - 1]; + } +} + +static int trace__printf_interrupted_entry(struct trace *trace) +{ + struct thread_trace *ttrace; + size_t printed; + int len; + + if (trace->failure_only || trace->current == NULL) + return 0; + + ttrace = thread__priv(trace->current); + + if (!ttrace->entry_pending) + return 0; + + printed = trace__fprintf_entry_head(trace, trace->current, 0, false, ttrace->entry_time, trace->output); + printed += len = fprintf(trace->output, "%s)", ttrace->entry_str); + + if (len < trace->args_alignment - 4) + printed += fprintf(trace->output, "%-*s", trace->args_alignment - 4 - len, " "); + + printed += fprintf(trace->output, " ...\n"); + + ttrace->entry_pending = false; + ++trace->nr_events_printed; + + return printed; +} + +static int trace__fprintf_sample(struct trace *trace, struct evsel *evsel, + struct perf_sample *sample, struct thread *thread) +{ + int printed = 0; + + if (trace->print_sample) { + double ts = (double)sample->time / NSEC_PER_MSEC; + + printed += fprintf(trace->output, "%22s %10.3f %s %d/%d [%d]\n", + evsel__name(evsel), ts, + thread__comm_str(thread), + sample->pid, sample->tid, sample->cpu); + } + + return printed; +} + +static void *syscall__augmented_args(struct syscall *sc, struct perf_sample *sample, int *augmented_args_size, int raw_augmented_args_size) +{ + void *augmented_args = NULL; + /* + * For now with BPF raw_augmented we hook into raw_syscalls:sys_enter + * and there we get all 6 syscall args plus the tracepoint common fields + * that gets calculated at the start and the syscall_nr (another long). + * So we check if that is the case and if so don't look after the + * sc->args_size but always after the full raw_syscalls:sys_enter payload, + * which is fixed. + * + * We'll revisit this later to pass s->args_size to the BPF augmenter + * (now tools/perf/examples/bpf/augmented_raw_syscalls.c, so that it + * copies only what we need for each syscall, like what happens when we + * use syscalls:sys_enter_NAME, so that we reduce the kernel/userspace + * traffic to just what is needed for each syscall. + */ + int args_size = raw_augmented_args_size ?: sc->args_size; + + *augmented_args_size = sample->raw_size - args_size; + if (*augmented_args_size > 0) + augmented_args = sample->raw_data + args_size; + + return augmented_args; +} + +static int trace__sys_enter(struct trace *trace, struct evsel *evsel, + union perf_event *event __maybe_unused, + struct perf_sample *sample) +{ + char *msg; + void *args; + int printed = 0; + struct thread *thread; + int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1; + int augmented_args_size = 0; + void *augmented_args = NULL; + struct syscall *sc = trace__syscall_info(trace, evsel, id); + struct thread_trace *ttrace; + + if (sc == NULL) + return -1; + + thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); + ttrace = thread__trace(thread, trace->output); + if (ttrace == NULL) + goto out_put; + + trace__fprintf_sample(trace, evsel, sample, thread); + + args = perf_evsel__sc_tp_ptr(evsel, args, sample); + + if (ttrace->entry_str == NULL) { + ttrace->entry_str = malloc(trace__entry_str_size); + if (!ttrace->entry_str) + goto out_put; + } + + if (!(trace->duration_filter || trace->summary_only || trace->min_stack)) + trace__printf_interrupted_entry(trace); + /* + * If this is raw_syscalls.sys_enter, then it always comes with the 6 possible + * arguments, even if the syscall being handled, say "openat", uses only 4 arguments + * this breaks syscall__augmented_args() check for augmented args, as we calculate + * syscall->args_size using each syscalls:sys_enter_NAME tracefs format file, + * so when handling, say the openat syscall, we end up getting 6 args for the + * raw_syscalls:sys_enter event, when we expected just 4, we end up mistakenly + * thinking that the extra 2 u64 args are the augmented filename, so just check + * here and avoid using augmented syscalls when the evsel is the raw_syscalls one. + */ + if (evsel != trace->syscalls.events.sys_enter) + augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size); + ttrace->entry_time = sample->time; + msg = ttrace->entry_str; + printed += scnprintf(msg + printed, trace__entry_str_size - printed, "%s(", sc->name); + + printed += syscall__scnprintf_args(sc, msg + printed, trace__entry_str_size - printed, + args, augmented_args, augmented_args_size, trace, thread); + + if (sc->is_exit) { + if (!(trace->duration_filter || trace->summary_only || trace->failure_only || trace->min_stack)) { + int alignment = 0; + + trace__fprintf_entry_head(trace, thread, 0, false, ttrace->entry_time, trace->output); + printed = fprintf(trace->output, "%s)", ttrace->entry_str); + if (trace->args_alignment > printed) + alignment = trace->args_alignment - printed; + fprintf(trace->output, "%*s= ?\n", alignment, " "); + } + } else { + ttrace->entry_pending = true; + /* See trace__vfs_getname & trace__sys_exit */ + ttrace->filename.pending_open = false; + } + + if (trace->current != thread) { + thread__put(trace->current); + trace->current = thread__get(thread); + } + err = 0; +out_put: + thread__put(thread); + return err; +} + +static int trace__fprintf_sys_enter(struct trace *trace, struct evsel *evsel, + struct perf_sample *sample) +{ + struct thread_trace *ttrace; + struct thread *thread; + int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1; + struct syscall *sc = trace__syscall_info(trace, evsel, id); + char msg[1024]; + void *args, *augmented_args = NULL; + int augmented_args_size; + + if (sc == NULL) + return -1; + + thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); + ttrace = thread__trace(thread, trace->output); + /* + * We need to get ttrace just to make sure it is there when syscall__scnprintf_args() + * and the rest of the beautifiers accessing it via struct syscall_arg touches it. + */ + if (ttrace == NULL) + goto out_put; + + args = perf_evsel__sc_tp_ptr(evsel, args, sample); + augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size); + syscall__scnprintf_args(sc, msg, sizeof(msg), args, augmented_args, augmented_args_size, trace, thread); + fprintf(trace->output, "%s", msg); + err = 0; +out_put: + thread__put(thread); + return err; +} + +static int trace__resolve_callchain(struct trace *trace, struct evsel *evsel, + struct perf_sample *sample, + struct callchain_cursor *cursor) +{ + struct addr_location al; + int max_stack = evsel->core.attr.sample_max_stack ? + evsel->core.attr.sample_max_stack : + trace->max_stack; + int err; + + if (machine__resolve(trace->host, &al, sample) < 0) + return -1; + + err = thread__resolve_callchain(al.thread, cursor, evsel, sample, NULL, NULL, max_stack); + addr_location__put(&al); + return err; +} + +static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sample) +{ + /* TODO: user-configurable print_opts */ + const unsigned int print_opts = EVSEL__PRINT_SYM | + EVSEL__PRINT_DSO | + EVSEL__PRINT_UNKNOWN_AS_ADDR; + + return sample__fprintf_callchain(sample, 38, print_opts, &callchain_cursor, symbol_conf.bt_stop_list, trace->output); +} + +static const char *errno_to_name(struct evsel *evsel, int err) +{ + struct perf_env *env = evsel__env(evsel); + const char *arch_name = perf_env__arch(env); + + return arch_syscalls__strerrno(arch_name, err); +} + +static int trace__sys_exit(struct trace *trace, struct evsel *evsel, + union perf_event *event __maybe_unused, + struct perf_sample *sample) +{ + long ret; + u64 duration = 0; + bool duration_calculated = false; + struct thread *thread; + int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1, callchain_ret = 0, printed = 0; + int alignment = trace->args_alignment; + struct syscall *sc = trace__syscall_info(trace, evsel, id); + struct thread_trace *ttrace; + + if (sc == NULL) + return -1; + + thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); + ttrace = thread__trace(thread, trace->output); + if (ttrace == NULL) + goto out_put; + + trace__fprintf_sample(trace, evsel, sample, thread); + + ret = perf_evsel__sc_tp_uint(evsel, ret, sample); + + if (trace->summary) + thread__update_stats(thread, ttrace, id, sample, ret, trace->errno_summary); + + if (!trace->fd_path_disabled && sc->is_open && ret >= 0 && ttrace->filename.pending_open) { + trace__set_fd_pathname(thread, ret, ttrace->filename.name); + ttrace->filename.pending_open = false; + ++trace->stats.vfs_getname; + } + + if (ttrace->entry_time) { + duration = sample->time - ttrace->entry_time; + if (trace__filter_duration(trace, duration)) + goto out; + duration_calculated = true; + } else if (trace->duration_filter) + goto out; + + if (sample->callchain) { + callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor); + if (callchain_ret == 0) { + if (callchain_cursor.nr < trace->min_stack) + goto out; + callchain_ret = 1; + } + } + + if (trace->summary_only || (ret >= 0 && trace->failure_only)) + goto out; + + trace__fprintf_entry_head(trace, thread, duration, duration_calculated, ttrace->entry_time, trace->output); + + if (ttrace->entry_pending) { + printed = fprintf(trace->output, "%s", ttrace->entry_str); + } else { + printed += fprintf(trace->output, " ... ["); + color_fprintf(trace->output, PERF_COLOR_YELLOW, "continued"); + printed += 9; + printed += fprintf(trace->output, "]: %s()", sc->name); + } + + printed++; /* the closing ')' */ + + if (alignment > printed) + alignment -= printed; + else + alignment = 0; + + fprintf(trace->output, ")%*s= ", alignment, " "); + + if (sc->fmt == NULL) { + if (ret < 0) + goto errno_print; +signed_print: + fprintf(trace->output, "%ld", ret); + } else if (ret < 0) { +errno_print: { + char bf[STRERR_BUFSIZE]; + const char *emsg = str_error_r(-ret, bf, sizeof(bf)), + *e = errno_to_name(evsel, -ret); + + fprintf(trace->output, "-1 %s (%s)", e, emsg); + } + } else if (ret == 0 && sc->fmt->timeout) + fprintf(trace->output, "0 (Timeout)"); + else if (ttrace->ret_scnprintf) { + char bf[1024]; + struct syscall_arg arg = { + .val = ret, + .thread = thread, + .trace = trace, + }; + ttrace->ret_scnprintf(bf, sizeof(bf), &arg); + ttrace->ret_scnprintf = NULL; + fprintf(trace->output, "%s", bf); + } else if (sc->fmt->hexret) + fprintf(trace->output, "%#lx", ret); + else if (sc->fmt->errpid) { + struct thread *child = machine__find_thread(trace->host, ret, ret); + + if (child != NULL) { + fprintf(trace->output, "%ld", ret); + if (child->comm_set) + fprintf(trace->output, " (%s)", thread__comm_str(child)); + thread__put(child); + } + } else + goto signed_print; + + fputc('\n', trace->output); + + /* + * We only consider an 'event' for the sake of --max-events a non-filtered + * sys_enter + sys_exit and other tracepoint events. + */ + if (++trace->nr_events_printed == trace->max_events && trace->max_events != ULONG_MAX) + interrupted = true; + + if (callchain_ret > 0) + trace__fprintf_callchain(trace, sample); + else if (callchain_ret < 0) + pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel)); +out: + ttrace->entry_pending = false; + err = 0; +out_put: + thread__put(thread); + return err; +} + +static int trace__vfs_getname(struct trace *trace, struct evsel *evsel, + union perf_event *event __maybe_unused, + struct perf_sample *sample) +{ + struct thread *thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); + struct thread_trace *ttrace; + size_t filename_len, entry_str_len, to_move; + ssize_t remaining_space; + char *pos; + const char *filename = evsel__rawptr(evsel, sample, "pathname"); + + if (!thread) + goto out; + + ttrace = thread__priv(thread); + if (!ttrace) + goto out_put; + + filename_len = strlen(filename); + if (filename_len == 0) + goto out_put; + + if (ttrace->filename.namelen < filename_len) { + char *f = realloc(ttrace->filename.name, filename_len + 1); + + if (f == NULL) + goto out_put; + + ttrace->filename.namelen = filename_len; + ttrace->filename.name = f; + } + + strcpy(ttrace->filename.name, filename); + ttrace->filename.pending_open = true; + + if (!ttrace->filename.ptr) + goto out_put; + + entry_str_len = strlen(ttrace->entry_str); + remaining_space = trace__entry_str_size - entry_str_len - 1; /* \0 */ + if (remaining_space <= 0) + goto out_put; + + if (filename_len > (size_t)remaining_space) { + filename += filename_len - remaining_space; + filename_len = remaining_space; + } + + to_move = entry_str_len - ttrace->filename.entry_str_pos + 1; /* \0 */ + pos = ttrace->entry_str + ttrace->filename.entry_str_pos; + memmove(pos + filename_len, pos, to_move); + memcpy(pos, filename, filename_len); + + ttrace->filename.ptr = 0; + ttrace->filename.entry_str_pos = 0; +out_put: + thread__put(thread); +out: + return 0; +} + +static int trace__sched_stat_runtime(struct trace *trace, struct evsel *evsel, + union perf_event *event __maybe_unused, + struct perf_sample *sample) +{ + u64 runtime = 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, + evsel__strval(evsel, sample, "comm"), + (pid_t)evsel__intval(evsel, sample, "pid"), + runtime, + evsel__intval(evsel, sample, "vruntime")); + goto out_put; +} + +static int bpf_output__printer(enum binary_printer_ops op, + unsigned int val, void *extra __maybe_unused, FILE *fp) +{ + unsigned char ch = (unsigned char)val; + + switch (op) { + case BINARY_PRINT_CHAR_DATA: + return fprintf(fp, "%c", isprint(ch) ? ch : '.'); + case BINARY_PRINT_DATA_BEGIN: + case BINARY_PRINT_LINE_BEGIN: + case BINARY_PRINT_ADDR: + case BINARY_PRINT_NUM_DATA: + case BINARY_PRINT_NUM_PAD: + case BINARY_PRINT_SEP: + case BINARY_PRINT_CHAR_PAD: + case BINARY_PRINT_LINE_END: + case BINARY_PRINT_DATA_END: + default: + break; + } + + return 0; +} + +static void bpf_output__fprintf(struct trace *trace, + struct perf_sample *sample) +{ + binary__fprintf(sample->raw_data, sample->raw_size, 8, + bpf_output__printer, NULL, trace->output); + ++trace->nr_events_printed; +} + +static size_t trace__fprintf_tp_fields(struct trace *trace, struct evsel *evsel, struct perf_sample *sample, + struct thread *thread, void *augmented_args, int augmented_args_size) +{ + char bf[2048]; + size_t size = sizeof(bf); + struct tep_format_field *field = evsel->tp_format->format.fields; + struct syscall_arg_fmt *arg = __evsel__syscall_arg_fmt(evsel); + size_t printed = 0; + unsigned long val; + u8 bit = 1; + struct syscall_arg syscall_arg = { + .augmented = { + .size = augmented_args_size, + .args = augmented_args, + }, + .idx = 0, + .mask = 0, + .trace = trace, + .thread = thread, + .show_string_prefix = trace->show_string_prefix, + }; + + for (; field && arg; field = field->next, ++syscall_arg.idx, bit <<= 1, ++arg) { + if (syscall_arg.mask & bit) + continue; + + syscall_arg.len = 0; + syscall_arg.fmt = arg; + if (field->flags & TEP_FIELD_IS_ARRAY) { + int offset = field->offset; + + if (field->flags & TEP_FIELD_IS_DYNAMIC) { + offset = format_field__intval(field, sample, evsel->needs_swap); + syscall_arg.len = offset >> 16; + offset &= 0xffff; + } + + val = (uintptr_t)(sample->raw_data + offset); + } else + val = format_field__intval(field, sample, evsel->needs_swap); + /* + * Some syscall args need some mask, most don't and + * return val untouched. + */ + val = syscall_arg_fmt__mask_val(arg, &syscall_arg, val); + + /* + * Suppress this argument if its value is zero and + * and we don't have a string associated in an + * strarray for it. + */ + if (val == 0 && + !trace->show_zeros && + !((arg->show_zero || + arg->scnprintf == SCA_STRARRAY || + arg->scnprintf == SCA_STRARRAYS) && + arg->parm)) + continue; + + printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : ""); + + /* + * XXX Perhaps we should have a show_tp_arg_names, + * leaving show_arg_names just for syscalls? + */ + if (1 || trace->show_arg_names) + printed += scnprintf(bf + printed, size - printed, "%s: ", field->name); + + printed += syscall_arg_fmt__scnprintf_val(arg, bf + printed, size - printed, &syscall_arg, val); + } + + return printed + fprintf(trace->output, "%s", bf); +} + +static int trace__event_handler(struct trace *trace, struct evsel *evsel, + union perf_event *event __maybe_unused, + struct perf_sample *sample) +{ + struct thread *thread; + int callchain_ret = 0; + /* + * Check if we called perf_evsel__disable(evsel) due to, for instance, + * this event's max_events having been hit and this is an entry coming + * from the ring buffer that we should discard, since the max events + * have already been considered/printed. + */ + if (evsel->disabled) + return 0; + + thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); + + if (sample->callchain) { + callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor); + if (callchain_ret == 0) { + if (callchain_cursor.nr < trace->min_stack) + goto out; + callchain_ret = 1; + } + } + + trace__printf_interrupted_entry(trace); + trace__fprintf_tstamp(trace, sample->time, trace->output); + + if (trace->trace_syscalls && trace->show_duration) + fprintf(trace->output, "( ): "); + + if (thread) + trace__fprintf_comm_tid(trace, thread, trace->output); + + if (evsel == trace->syscalls.events.augmented) { + int id = perf_evsel__sc_tp_uint(evsel, id, sample); + struct syscall *sc = trace__syscall_info(trace, evsel, id); + + if (sc) { + fprintf(trace->output, "%s(", sc->name); + trace__fprintf_sys_enter(trace, evsel, sample); + fputc(')', trace->output); + goto newline; + } + + /* + * XXX: Not having the associated syscall info or not finding/adding + * the thread should never happen, but if it does... + * fall thru and print it as a bpf_output event. + */ + } + + fprintf(trace->output, "%s(", evsel->name); + + if (evsel__is_bpf_output(evsel)) { + bpf_output__fprintf(trace, sample); + } else if (evsel->tp_format) { + if (strncmp(evsel->tp_format->name, "sys_enter_", 10) || + trace__fprintf_sys_enter(trace, evsel, sample)) { + if (trace->libtraceevent_print) { + event_format__fprintf(evsel->tp_format, sample->cpu, + sample->raw_data, sample->raw_size, + trace->output); + } else { + trace__fprintf_tp_fields(trace, evsel, sample, thread, NULL, 0); + } + } + } + +newline: + fprintf(trace->output, ")\n"); + + if (callchain_ret > 0) + trace__fprintf_callchain(trace, sample); + else if (callchain_ret < 0) + pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel)); + + ++trace->nr_events_printed; + + if (evsel->max_events != ULONG_MAX && ++evsel->nr_events_printed == evsel->max_events) { + evsel__disable(evsel); + evsel__close(evsel); + } +out: + thread__put(thread); + return 0; +} + +static void print_location(FILE *f, struct perf_sample *sample, + struct addr_location *al, + bool print_dso, bool print_sym) +{ + + if ((verbose > 0 || print_dso) && al->map) + fprintf(f, "%s@", al->map->dso->long_name); + + if ((verbose > 0 || print_sym) && al->sym) + fprintf(f, "%s+0x%" PRIx64, al->sym->name, + al->addr - al->sym->start); + else if (al->map) + fprintf(f, "0x%" PRIx64, al->addr); + else + fprintf(f, "0x%" PRIx64, sample->addr); +} + +static int trace__pgfault(struct trace *trace, + struct evsel *evsel, + union perf_event *event __maybe_unused, + struct perf_sample *sample) +{ + struct thread *thread; + struct addr_location al; + char map_type = 'd'; + struct thread_trace *ttrace; + int err = -1; + int callchain_ret = 0; + + thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); + + if (sample->callchain) { + callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor); + if (callchain_ret == 0) { + if (callchain_cursor.nr < trace->min_stack) + goto out_put; + callchain_ret = 1; + } + } + + ttrace = thread__trace(thread, trace->output); + if (ttrace == NULL) + goto out_put; + + if (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ) + ttrace->pfmaj++; + else + ttrace->pfmin++; + + if (trace->summary_only) + goto out; + + thread__find_symbol(thread, sample->cpumode, sample->ip, &al); + + trace__fprintf_entry_head(trace, thread, 0, true, sample->time, trace->output); + + fprintf(trace->output, "%sfault [", + evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ? + "maj" : "min"); + + print_location(trace->output, sample, &al, false, true); + + fprintf(trace->output, "] => "); + + thread__find_symbol(thread, sample->cpumode, sample->addr, &al); + + if (!al.map) { + thread__find_symbol(thread, sample->cpumode, sample->addr, &al); + + if (al.map) + map_type = 'x'; + else + map_type = '?'; + } + + print_location(trace->output, sample, &al, true, false); + + fprintf(trace->output, " (%c%c)\n", map_type, al.level); + + if (callchain_ret > 0) + trace__fprintf_callchain(trace, sample); + else if (callchain_ret < 0) + pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel)); + + ++trace->nr_events_printed; +out: + err = 0; +out_put: + thread__put(thread); + return err; +} + +static void trace__set_base_time(struct trace *trace, + struct evsel *evsel, + struct perf_sample *sample) +{ + /* + * BPF events were not setting PERF_SAMPLE_TIME, so be more robust + * and don't use sample->time unconditionally, we may end up having + * some other event in the future without PERF_SAMPLE_TIME for good + * reason, i.e. we may not be interested in its timestamps, just in + * it taking place, picking some piece of information when it + * appears in our event stream (vfs_getname comes to mind). + */ + if (trace->base_time == 0 && !trace->full_time && + (evsel->core.attr.sample_type & PERF_SAMPLE_TIME)) + trace->base_time = sample->time; +} + +static int trace__process_sample(struct perf_tool *tool, + union perf_event *event, + struct perf_sample *sample, + struct evsel *evsel, + struct machine *machine __maybe_unused) +{ + struct trace *trace = container_of(tool, struct trace, tool); + struct thread *thread; + int err = 0; + + tracepoint_handler handler = evsel->handler; + + thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); + if (thread && thread__is_filtered(thread)) + goto out; + + trace__set_base_time(trace, evsel, sample); + + if (handler) { + ++trace->nr_events; + handler(trace, evsel, event, sample); + } +out: + thread__put(thread); + return err; +} + +static int trace__record(struct trace *trace, int argc, const char **argv) +{ + unsigned int rec_argc, i, j; + const char **rec_argv; + const char * const record_args[] = { + "record", + "-R", + "-m", "1024", + "-c", "1", + }; + pid_t pid = getpid(); + char *filter = asprintf__tp_filter_pids(1, &pid); + const char * const sc_args[] = { "-e", }; + unsigned int sc_args_nr = ARRAY_SIZE(sc_args); + const char * const majpf_args[] = { "-e", "major-faults" }; + unsigned int majpf_args_nr = ARRAY_SIZE(majpf_args); + const char * const minpf_args[] = { "-e", "minor-faults" }; + unsigned int minpf_args_nr = ARRAY_SIZE(minpf_args); + int err = -1; + + /* +3 is for the event string below and the pid filter */ + rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 3 + + majpf_args_nr + minpf_args_nr + argc; + rec_argv = calloc(rec_argc + 1, sizeof(char *)); + + if (rec_argv == NULL || filter == NULL) + goto out_free; + + j = 0; + for (i = 0; i < ARRAY_SIZE(record_args); i++) + rec_argv[j++] = record_args[i]; + + if (trace->trace_syscalls) { + for (i = 0; i < sc_args_nr; i++) + rec_argv[j++] = sc_args[i]; + + /* event string may be different for older kernels - e.g., RHEL6 */ + if (is_valid_tracepoint("raw_syscalls:sys_enter")) + rec_argv[j++] = "raw_syscalls:sys_enter,raw_syscalls:sys_exit"; + else if (is_valid_tracepoint("syscalls:sys_enter")) + rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit"; + else { + pr_err("Neither raw_syscalls nor syscalls events exist.\n"); + goto out_free; + } + } + + rec_argv[j++] = "--filter"; + rec_argv[j++] = filter; + + if (trace->trace_pgfaults & TRACE_PFMAJ) + for (i = 0; i < majpf_args_nr; i++) + rec_argv[j++] = majpf_args[i]; + + if (trace->trace_pgfaults & TRACE_PFMIN) + for (i = 0; i < minpf_args_nr; i++) + rec_argv[j++] = minpf_args[i]; + + for (i = 0; i < (unsigned int)argc; i++) + rec_argv[j++] = argv[i]; + + err = cmd_record(j, rec_argv); +out_free: + free(filter); + free(rec_argv); + return err; +} + +static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp); + +static bool evlist__add_vfs_getname(struct evlist *evlist) +{ + bool found = false; + struct evsel *evsel, *tmp; + struct parse_events_error err; + int ret; + + bzero(&err, sizeof(err)); + ret = parse_events(evlist, "probe:vfs_getname*", &err); + if (ret) { + free(err.str); + free(err.help); + free(err.first_str); + free(err.first_help); + return false; + } + + evlist__for_each_entry_safe(evlist, evsel, tmp) { + if (!strstarts(evsel__name(evsel), "probe:vfs_getname")) + continue; + + if (evsel__field(evsel, "pathname")) { + evsel->handler = trace__vfs_getname; + found = true; + continue; + } + + list_del_init(&evsel->core.node); + evsel->evlist = NULL; + evsel__delete(evsel); + } + + return found; +} + +static struct evsel *evsel__new_pgfault(u64 config) +{ + struct evsel *evsel; + struct perf_event_attr attr = { + .type = PERF_TYPE_SOFTWARE, + .mmap_data = 1, + }; + + attr.config = config; + attr.sample_period = 1; + + event_attr_init(&attr); + + evsel = evsel__new(&attr); + if (evsel) + evsel->handler = trace__pgfault; + + return evsel; +} + +static void trace__handle_event(struct trace *trace, union perf_event *event, struct perf_sample *sample) +{ + const u32 type = event->header.type; + struct evsel *evsel; + + if (type != PERF_RECORD_SAMPLE) { + trace__process_event(trace, trace->host, event, sample); + return; + } + + evsel = perf_evlist__id2evsel(trace->evlist, sample->id); + if (evsel == NULL) { + fprintf(trace->output, "Unknown tp ID %" PRIu64 ", skipping...\n", sample->id); + return; + } + + if (evswitch__discard(&trace->evswitch, evsel)) + return; + + trace__set_base_time(trace, evsel, sample); + + if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT && + sample->raw_data == NULL) { + fprintf(trace->output, "%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n", + evsel__name(evsel), sample->tid, + sample->cpu, sample->raw_size); + } else { + tracepoint_handler handler = evsel->handler; + handler(trace, evsel, event, sample); + } + + if (trace->nr_events_printed >= trace->max_events && trace->max_events != ULONG_MAX) + interrupted = true; +} + +static int trace__add_syscall_newtp(struct trace *trace) +{ + int ret = -1; + struct evlist *evlist = trace->evlist; + struct evsel *sys_enter, *sys_exit; + + sys_enter = perf_evsel__raw_syscall_newtp("sys_enter", trace__sys_enter); + if (sys_enter == NULL) + goto out; + + if (perf_evsel__init_sc_tp_ptr_field(sys_enter, args)) + goto out_delete_sys_enter; + + sys_exit = perf_evsel__raw_syscall_newtp("sys_exit", trace__sys_exit); + if (sys_exit == NULL) + goto out_delete_sys_enter; + + if (perf_evsel__init_sc_tp_uint_field(sys_exit, ret)) + goto out_delete_sys_exit; + + evsel__config_callchain(sys_enter, &trace->opts, &callchain_param); + evsel__config_callchain(sys_exit, &trace->opts, &callchain_param); + + evlist__add(evlist, sys_enter); + evlist__add(evlist, sys_exit); + + if (callchain_param.enabled && !trace->kernel_syscallchains) { + /* + * We're interested only in the user space callchain + * leading to the syscall, allow overriding that for + * debugging reasons using --kernel_syscall_callchains + */ + sys_exit->core.attr.exclude_callchain_kernel = 1; + } + + trace->syscalls.events.sys_enter = sys_enter; + trace->syscalls.events.sys_exit = sys_exit; + + ret = 0; +out: + return ret; + +out_delete_sys_exit: + evsel__delete_priv(sys_exit); +out_delete_sys_enter: + evsel__delete_priv(sys_enter); + goto out; +} + +static int trace__set_ev_qualifier_tp_filter(struct trace *trace) +{ + int err = -1; + struct evsel *sys_exit; + char *filter = asprintf_expr_inout_ints("id", !trace->not_ev_qualifier, + trace->ev_qualifier_ids.nr, + trace->ev_qualifier_ids.entries); + + if (filter == NULL) + goto out_enomem; + + if (!evsel__append_tp_filter(trace->syscalls.events.sys_enter, filter)) { + sys_exit = trace->syscalls.events.sys_exit; + err = evsel__append_tp_filter(sys_exit, filter); + } + + free(filter); +out: + return err; +out_enomem: + errno = ENOMEM; + goto out; +} + +#ifdef HAVE_LIBBPF_SUPPORT +static struct bpf_map *trace__find_bpf_map_by_name(struct trace *trace, const char *name) +{ + if (trace->bpf_obj == NULL) + return NULL; + + return bpf_object__find_map_by_name(trace->bpf_obj, name); +} + +static void trace__set_bpf_map_filtered_pids(struct trace *trace) +{ + trace->filter_pids.map = trace__find_bpf_map_by_name(trace, "pids_filtered"); +} + +static void trace__set_bpf_map_syscalls(struct trace *trace) +{ + trace->syscalls.map = trace__find_bpf_map_by_name(trace, "syscalls"); + trace->syscalls.prog_array.sys_enter = trace__find_bpf_map_by_name(trace, "syscalls_sys_enter"); + trace->syscalls.prog_array.sys_exit = trace__find_bpf_map_by_name(trace, "syscalls_sys_exit"); +} + +static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace, const char *name) +{ + if (trace->bpf_obj == NULL) + return NULL; + + return bpf_object__find_program_by_title(trace->bpf_obj, name); +} + +static struct bpf_program *trace__find_syscall_bpf_prog(struct trace *trace, struct syscall *sc, + const char *prog_name, const char *type) +{ + struct bpf_program *prog; + + if (prog_name == NULL) { + char default_prog_name[256]; + scnprintf(default_prog_name, sizeof(default_prog_name), "!syscalls:sys_%s_%s", type, sc->name); + prog = trace__find_bpf_program_by_title(trace, default_prog_name); + if (prog != NULL) + goto out_found; + if (sc->fmt && sc->fmt->alias) { + scnprintf(default_prog_name, sizeof(default_prog_name), "!syscalls:sys_%s_%s", type, sc->fmt->alias); + prog = trace__find_bpf_program_by_title(trace, default_prog_name); + if (prog != NULL) + goto out_found; + } + goto out_unaugmented; + } + + prog = trace__find_bpf_program_by_title(trace, prog_name); + + if (prog != NULL) { +out_found: + return prog; + } + + pr_debug("Couldn't find BPF prog \"%s\" to associate with syscalls:sys_%s_%s, not augmenting it\n", + prog_name, type, sc->name); +out_unaugmented: + return trace->syscalls.unaugmented_prog; +} + +static void trace__init_syscall_bpf_progs(struct trace *trace, int id) +{ + struct syscall *sc = trace__syscall_info(trace, NULL, id); + + if (sc == NULL) + return; + + sc->bpf_prog.sys_enter = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_enter : NULL, "enter"); + sc->bpf_prog.sys_exit = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_exit : NULL, "exit"); +} + +static int trace__bpf_prog_sys_enter_fd(struct trace *trace, int id) +{ + struct syscall *sc = trace__syscall_info(trace, NULL, id); + return sc ? bpf_program__fd(sc->bpf_prog.sys_enter) : bpf_program__fd(trace->syscalls.unaugmented_prog); +} + +static int trace__bpf_prog_sys_exit_fd(struct trace *trace, int id) +{ + struct syscall *sc = trace__syscall_info(trace, NULL, id); + return sc ? bpf_program__fd(sc->bpf_prog.sys_exit) : bpf_program__fd(trace->syscalls.unaugmented_prog); +} + +static void trace__init_bpf_map_syscall_args(struct trace *trace, int id, struct bpf_map_syscall_entry *entry) +{ + struct syscall *sc = trace__syscall_info(trace, NULL, id); + int arg = 0; + + if (sc == NULL) + goto out; + + for (; arg < sc->nr_args; ++arg) { + entry->string_args_len[arg] = 0; + if (sc->arg_fmt[arg].scnprintf == SCA_FILENAME) { + /* Should be set like strace -s strsize */ + entry->string_args_len[arg] = PATH_MAX; + } + } +out: + for (; arg < 6; ++arg) + entry->string_args_len[arg] = 0; +} +static int trace__set_ev_qualifier_bpf_filter(struct trace *trace) +{ + int fd = bpf_map__fd(trace->syscalls.map); + struct bpf_map_syscall_entry value = { + .enabled = !trace->not_ev_qualifier, + }; + int err = 0; + size_t i; + + for (i = 0; i < trace->ev_qualifier_ids.nr; ++i) { + int key = trace->ev_qualifier_ids.entries[i]; + + if (value.enabled) { + trace__init_bpf_map_syscall_args(trace, key, &value); + trace__init_syscall_bpf_progs(trace, key); + } + + err = bpf_map_update_elem(fd, &key, &value, BPF_EXIST); + if (err) + break; + } + + return err; +} + +static int __trace__init_syscalls_bpf_map(struct trace *trace, bool enabled) +{ + int fd = bpf_map__fd(trace->syscalls.map); + struct bpf_map_syscall_entry value = { + .enabled = enabled, + }; + int err = 0, key; + + for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) { + if (enabled) + trace__init_bpf_map_syscall_args(trace, key, &value); + + err = bpf_map_update_elem(fd, &key, &value, BPF_ANY); + if (err) + break; + } + + return err; +} + +static int trace__init_syscalls_bpf_map(struct trace *trace) +{ + bool enabled = true; + + if (trace->ev_qualifier_ids.nr) + enabled = trace->not_ev_qualifier; + + return __trace__init_syscalls_bpf_map(trace, enabled); +} + +static struct bpf_program *trace__find_usable_bpf_prog_entry(struct trace *trace, struct syscall *sc) +{ + struct tep_format_field *field, *candidate_field; + int id; + + /* + * We're only interested in syscalls that have a pointer: + */ + for (field = sc->args; field; field = field->next) { + if (field->flags & TEP_FIELD_IS_POINTER) + goto try_to_find_pair; + } + + return NULL; + +try_to_find_pair: + for (id = 0; id < trace->sctbl->syscalls.nr_entries; ++id) { + struct syscall *pair = trace__syscall_info(trace, NULL, id); + struct bpf_program *pair_prog; + bool is_candidate = false; + + if (pair == NULL || pair == sc || + pair->bpf_prog.sys_enter == trace->syscalls.unaugmented_prog) + continue; + + for (field = sc->args, candidate_field = pair->args; + field && candidate_field; field = field->next, candidate_field = candidate_field->next) { + bool is_pointer = field->flags & TEP_FIELD_IS_POINTER, + candidate_is_pointer = candidate_field->flags & TEP_FIELD_IS_POINTER; + + if (is_pointer) { + if (!candidate_is_pointer) { + // The candidate just doesn't copies our pointer arg, might copy other pointers we want. + continue; + } + } else { + if (candidate_is_pointer) { + // The candidate might copy a pointer we don't have, skip it. + goto next_candidate; + } + continue; + } + + if (strcmp(field->type, candidate_field->type)) + goto next_candidate; + + is_candidate = true; + } + + if (!is_candidate) + goto next_candidate; + + /* + * Check if the tentative pair syscall augmenter has more pointers, if it has, + * then it may be collecting that and we then can't use it, as it would collect + * more than what is common to the two syscalls. + */ + if (candidate_field) { + for (candidate_field = candidate_field->next; candidate_field; candidate_field = candidate_field->next) + if (candidate_field->flags & TEP_FIELD_IS_POINTER) + goto next_candidate; + } + + pair_prog = pair->bpf_prog.sys_enter; + /* + * If the pair isn't enabled, then its bpf_prog.sys_enter will not + * have been searched for, so search it here and if it returns the + * unaugmented one, then ignore it, otherwise we'll reuse that BPF + * program for a filtered syscall on a non-filtered one. + * + * For instance, we have "!syscalls:sys_enter_renameat" and that is + * useful for "renameat2". + */ + if (pair_prog == NULL) { + pair_prog = trace__find_syscall_bpf_prog(trace, pair, pair->fmt ? pair->fmt->bpf_prog_name.sys_enter : NULL, "enter"); + if (pair_prog == trace->syscalls.unaugmented_prog) + goto next_candidate; + } + + pr_debug("Reusing \"%s\" BPF sys_enter augmenter for \"%s\"\n", pair->name, sc->name); + return pair_prog; + next_candidate: + continue; + } + + return NULL; +} + +static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace) +{ + int map_enter_fd = bpf_map__fd(trace->syscalls.prog_array.sys_enter), + map_exit_fd = bpf_map__fd(trace->syscalls.prog_array.sys_exit); + int err = 0, key; + + for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) { + int prog_fd; + + if (!trace__syscall_enabled(trace, key)) + continue; + + trace__init_syscall_bpf_progs(trace, key); + + // It'll get at least the "!raw_syscalls:unaugmented" + prog_fd = trace__bpf_prog_sys_enter_fd(trace, key); + err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY); + if (err) + break; + prog_fd = trace__bpf_prog_sys_exit_fd(trace, key); + err = bpf_map_update_elem(map_exit_fd, &key, &prog_fd, BPF_ANY); + if (err) + break; + } + + /* + * Now lets do a second pass looking for enabled syscalls without + * an augmenter that have a signature that is a superset of another + * syscall with an augmenter so that we can auto-reuse it. + * + * I.e. if we have an augmenter for the "open" syscall that has + * this signature: + * + * int open(const char *pathname, int flags, mode_t mode); + * + * I.e. that will collect just the first string argument, then we + * can reuse it for the 'creat' syscall, that has this signature: + * + * int creat(const char *pathname, mode_t mode); + * + * and for: + * + * int stat(const char *pathname, struct stat *statbuf); + * int lstat(const char *pathname, struct stat *statbuf); + * + * Because the 'open' augmenter will collect the first arg as a string, + * and leave alone all the other args, which already helps with + * beautifying 'stat' and 'lstat''s pathname arg. + * + * Then, in time, when 'stat' gets an augmenter that collects both + * first and second arg (this one on the raw_syscalls:sys_exit prog + * array tail call, then that one will be used. + */ + for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) { + struct syscall *sc = trace__syscall_info(trace, NULL, key); + struct bpf_program *pair_prog; + int prog_fd; + + if (sc == NULL || sc->bpf_prog.sys_enter == NULL) + continue; + + /* + * For now we're just reusing the sys_enter prog, and if it + * already has an augmenter, we don't need to find one. + */ + if (sc->bpf_prog.sys_enter != trace->syscalls.unaugmented_prog) + continue; + + /* + * Look at all the other syscalls for one that has a signature + * that is close enough that we can share: + */ + pair_prog = trace__find_usable_bpf_prog_entry(trace, sc); + if (pair_prog == NULL) + continue; + + sc->bpf_prog.sys_enter = pair_prog; + + /* + * Update the BPF_MAP_TYPE_PROG_SHARED for raw_syscalls:sys_enter + * with the fd for the program we're reusing: + */ + prog_fd = bpf_program__fd(sc->bpf_prog.sys_enter); + err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY); + if (err) + break; + } + + + return err; +} + +static void trace__delete_augmented_syscalls(struct trace *trace) +{ + struct evsel *evsel, *tmp; + + evlist__remove(trace->evlist, trace->syscalls.events.augmented); + evsel__delete(trace->syscalls.events.augmented); + trace->syscalls.events.augmented = NULL; + + evlist__for_each_entry_safe(trace->evlist, tmp, evsel) { + if (evsel->bpf_obj == trace->bpf_obj) { + evlist__remove(trace->evlist, evsel); + evsel__delete(evsel); + } + + } + + bpf_object__close(trace->bpf_obj); + trace->bpf_obj = NULL; +} +#else // HAVE_LIBBPF_SUPPORT +static struct bpf_map *trace__find_bpf_map_by_name(struct trace *trace __maybe_unused, + const char *name __maybe_unused) +{ + return NULL; +} + +static void trace__set_bpf_map_filtered_pids(struct trace *trace __maybe_unused) +{ +} + +static void trace__set_bpf_map_syscalls(struct trace *trace __maybe_unused) +{ +} + +static int trace__set_ev_qualifier_bpf_filter(struct trace *trace __maybe_unused) +{ + return 0; +} + +static int trace__init_syscalls_bpf_map(struct trace *trace __maybe_unused) +{ + return 0; +} + +static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace __maybe_unused, + const char *name __maybe_unused) +{ + return NULL; +} + +static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace __maybe_unused) +{ + return 0; +} + +static void trace__delete_augmented_syscalls(struct trace *trace __maybe_unused) +{ +} +#endif // HAVE_LIBBPF_SUPPORT + +static bool trace__only_augmented_syscalls_evsels(struct trace *trace) +{ + struct evsel *evsel; + + evlist__for_each_entry(trace->evlist, evsel) { + if (evsel == trace->syscalls.events.augmented || + evsel->bpf_obj == trace->bpf_obj) + continue; + + return false; + } + + return true; +} + +static int trace__set_ev_qualifier_filter(struct trace *trace) +{ + if (trace->syscalls.map) + return trace__set_ev_qualifier_bpf_filter(trace); + if (trace->syscalls.events.sys_enter) + return trace__set_ev_qualifier_tp_filter(trace); + return 0; +} + +static int bpf_map__set_filter_pids(struct bpf_map *map __maybe_unused, + size_t npids __maybe_unused, pid_t *pids __maybe_unused) +{ + int err = 0; +#ifdef HAVE_LIBBPF_SUPPORT + bool value = true; + int map_fd = bpf_map__fd(map); + size_t i; + + for (i = 0; i < npids; ++i) { + err = bpf_map_update_elem(map_fd, &pids[i], &value, BPF_ANY); + if (err) + break; + } +#endif + return err; +} + +static int trace__set_filter_loop_pids(struct trace *trace) +{ + unsigned int nr = 1, err; + pid_t pids[32] = { + getpid(), + }; + struct thread *thread = machine__find_thread(trace->host, pids[0], pids[0]); + + while (thread && nr < ARRAY_SIZE(pids)) { + struct thread *parent = machine__find_thread(trace->host, thread->ppid, thread->ppid); + + if (parent == NULL) + break; + + if (!strcmp(thread__comm_str(parent), "sshd") || + strstarts(thread__comm_str(parent), "gnome-terminal")) { + pids[nr++] = parent->tid; + break; + } + thread = parent; + } + + err = perf_evlist__append_tp_filter_pids(trace->evlist, nr, pids); + if (!err && trace->filter_pids.map) + err = bpf_map__set_filter_pids(trace->filter_pids.map, nr, pids); + + return err; +} + +static int trace__set_filter_pids(struct trace *trace) +{ + int err = 0; + /* + * Better not use !target__has_task() here because we need to cover the + * case where no threads were specified in the command line, but a + * workload was, and in that case we will fill in the thread_map when + * we fork the workload in perf_evlist__prepare_workload. + */ + if (trace->filter_pids.nr > 0) { + err = perf_evlist__append_tp_filter_pids(trace->evlist, trace->filter_pids.nr, + trace->filter_pids.entries); + if (!err && trace->filter_pids.map) { + err = bpf_map__set_filter_pids(trace->filter_pids.map, trace->filter_pids.nr, + trace->filter_pids.entries); + } + } else if (perf_thread_map__pid(trace->evlist->core.threads, 0) == -1) { + err = trace__set_filter_loop_pids(trace); + } + + return err; +} + +static int __trace__deliver_event(struct trace *trace, union perf_event *event) +{ + struct evlist *evlist = trace->evlist; + struct perf_sample sample; + int err; + + err = perf_evlist__parse_sample(evlist, event, &sample); + if (err) + fprintf(trace->output, "Can't parse sample, err = %d, skipping...\n", err); + else + trace__handle_event(trace, event, &sample); + + return 0; +} + +static int __trace__flush_events(struct trace *trace) +{ + u64 first = ordered_events__first_time(&trace->oe.data); + u64 flush = trace->oe.last - NSEC_PER_SEC; + + /* Is there some thing to flush.. */ + if (first && first < flush) + return ordered_events__flush_time(&trace->oe.data, flush); + + return 0; +} + +static int trace__flush_events(struct trace *trace) +{ + return !trace->sort_events ? 0 : __trace__flush_events(trace); +} + +static int trace__deliver_event(struct trace *trace, union perf_event *event) +{ + int err; + + if (!trace->sort_events) + return __trace__deliver_event(trace, event); + + err = perf_evlist__parse_sample_timestamp(trace->evlist, event, &trace->oe.last); + if (err && err != -1) + return err; + + err = ordered_events__queue(&trace->oe.data, event, trace->oe.last, 0); + if (err) + return err; + + return trace__flush_events(trace); +} + +static int ordered_events__deliver_event(struct ordered_events *oe, + struct ordered_event *event) +{ + struct trace *trace = container_of(oe, struct trace, oe.data); + + return __trace__deliver_event(trace, event->event); +} + +static struct syscall_arg_fmt *evsel__find_syscall_arg_fmt_by_name(struct evsel *evsel, char *arg) +{ + struct tep_format_field *field; + struct syscall_arg_fmt *fmt = __evsel__syscall_arg_fmt(evsel); + + if (evsel->tp_format == NULL || fmt == NULL) + return NULL; + + for (field = evsel->tp_format->format.fields; field; field = field->next, ++fmt) + if (strcmp(field->name, arg) == 0) + return fmt; + + return NULL; +} + +static int trace__expand_filter(struct trace *trace __maybe_unused, struct evsel *evsel) +{ + char *tok, *left = evsel->filter, *new_filter = evsel->filter; + + while ((tok = strpbrk(left, "=<>!")) != NULL) { + char *right = tok + 1, *right_end; + + if (*right == '=') + ++right; + + while (isspace(*right)) + ++right; + + if (*right == '\0') + break; + + while (!isalpha(*left)) + if (++left == tok) { + /* + * Bail out, can't find the name of the argument that is being + * used in the filter, let it try to set this filter, will fail later. + */ + return 0; + } + + right_end = right + 1; + while (isalnum(*right_end) || *right_end == '_' || *right_end == '|') + ++right_end; + + if (isalpha(*right)) { + struct syscall_arg_fmt *fmt; + int left_size = tok - left, + right_size = right_end - right; + char arg[128]; + + while (isspace(left[left_size - 1])) + --left_size; + + scnprintf(arg, sizeof(arg), "%.*s", left_size, left); + + fmt = evsel__find_syscall_arg_fmt_by_name(evsel, arg); + if (fmt == NULL) { + pr_err("\"%s\" not found in \"%s\", can't set filter \"%s\"\n", + arg, evsel->name, evsel->filter); + return -1; + } + + pr_debug2("trying to expand \"%s\" \"%.*s\" \"%.*s\" -> ", + arg, (int)(right - tok), tok, right_size, right); + + if (fmt->strtoul) { + u64 val; + struct syscall_arg syscall_arg = { + .parm = fmt->parm, + }; + + if (fmt->strtoul(right, right_size, &syscall_arg, &val)) { + char *n, expansion[19]; + int expansion_lenght = scnprintf(expansion, sizeof(expansion), "%#" PRIx64, val); + int expansion_offset = right - new_filter; + + pr_debug("%s", expansion); + + if (asprintf(&n, "%.*s%s%s", expansion_offset, new_filter, expansion, right_end) < 0) { + pr_debug(" out of memory!\n"); + free(new_filter); + return -1; + } + if (new_filter != evsel->filter) + free(new_filter); + left = n + expansion_offset + expansion_lenght; + new_filter = n; + } else { + pr_err("\"%.*s\" not found for \"%s\" in \"%s\", can't set filter \"%s\"\n", + right_size, right, arg, evsel->name, evsel->filter); + return -1; + } + } else { + pr_err("No resolver (strtoul) for \"%s\" in \"%s\", can't set filter \"%s\"\n", + arg, evsel->name, evsel->filter); + return -1; + } + + pr_debug("\n"); + } else { + left = right_end; + } + } + + if (new_filter != evsel->filter) { + pr_debug("New filter for %s: %s\n", evsel->name, new_filter); + evsel__set_filter(evsel, new_filter); + free(new_filter); + } + + return 0; +} + +static int trace__expand_filters(struct trace *trace, struct evsel **err_evsel) +{ + struct evlist *evlist = trace->evlist; + struct evsel *evsel; + + evlist__for_each_entry(evlist, evsel) { + if (evsel->filter == NULL) + continue; + + if (trace__expand_filter(trace, evsel)) { + *err_evsel = evsel; + return -1; + } + } + + return 0; +} + +static int trace__run(struct trace *trace, int argc, const char **argv) +{ + struct evlist *evlist = trace->evlist; + struct evsel *evsel, *pgfault_maj = NULL, *pgfault_min = NULL; + int err = -1, i; + unsigned long before; + const bool forks = argc > 0; + bool draining = false; + + trace->live = true; + + if (!trace->raw_augmented_syscalls) { + if (trace->trace_syscalls && trace__add_syscall_newtp(trace)) + goto out_error_raw_syscalls; + + if (trace->trace_syscalls) + trace->vfs_getname = evlist__add_vfs_getname(evlist); + } + + if ((trace->trace_pgfaults & TRACE_PFMAJ)) { + pgfault_maj = evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MAJ); + if (pgfault_maj == NULL) + goto out_error_mem; + evsel__config_callchain(pgfault_maj, &trace->opts, &callchain_param); + evlist__add(evlist, pgfault_maj); + } + + if ((trace->trace_pgfaults & TRACE_PFMIN)) { + pgfault_min = evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MIN); + if (pgfault_min == NULL) + goto out_error_mem; + evsel__config_callchain(pgfault_min, &trace->opts, &callchain_param); + evlist__add(evlist, pgfault_min); + } + + if (trace->sched && + evlist__add_newtp(evlist, "sched", "sched_stat_runtime", trace__sched_stat_runtime)) + goto out_error_sched_stat_runtime; + /* + * If a global cgroup was set, apply it to all the events without an + * explicit cgroup. I.e.: + * + * trace -G A -e sched:*switch + * + * Will set all raw_syscalls:sys_{enter,exit}, pgfault, vfs_getname, etc + * _and_ sched:sched_switch to the 'A' cgroup, while: + * + * trace -e sched:*switch -G A + * + * will only set the sched:sched_switch event to the 'A' cgroup, all the + * other events (raw_syscalls:sys_{enter,exit}, etc are left "without" + * a cgroup (on the root cgroup, sys wide, etc). + * + * Multiple cgroups: + * + * trace -G A -e sched:*switch -G B + * + * the syscall ones go to the 'A' cgroup, the sched:sched_switch goes + * to the 'B' cgroup. + * + * evlist__set_default_cgroup() grabs a reference of the passed cgroup + * only for the evsels still without a cgroup, i.e. evsel->cgroup == NULL. + */ + if (trace->cgroup) + evlist__set_default_cgroup(trace->evlist, trace->cgroup); + + err = perf_evlist__create_maps(evlist, &trace->opts.target); + if (err < 0) { + fprintf(trace->output, "Problems parsing the target to trace, check your options!\n"); + goto out_delete_evlist; + } + + err = trace__symbols_init(trace, evlist); + if (err < 0) { + fprintf(trace->output, "Problems initializing symbol libraries!\n"); + goto out_delete_evlist; + } + + perf_evlist__config(evlist, &trace->opts, &callchain_param); + + signal(SIGCHLD, sig_handler); + signal(SIGINT, sig_handler); + + if (forks) { + err = perf_evlist__prepare_workload(evlist, &trace->opts.target, + argv, false, NULL); + if (err < 0) { + fprintf(trace->output, "Couldn't run the workload!\n"); + goto out_delete_evlist; + } + } + + err = evlist__open(evlist); + if (err < 0) + goto out_error_open; + + err = bpf__apply_obj_config(); + if (err) { + char errbuf[BUFSIZ]; + + bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf)); + pr_err("ERROR: Apply config to BPF failed: %s\n", + errbuf); + goto out_error_open; + } + + err = trace__set_filter_pids(trace); + if (err < 0) + goto out_error_mem; + + if (trace->syscalls.map) + trace__init_syscalls_bpf_map(trace); + + if (trace->syscalls.prog_array.sys_enter) + trace__init_syscalls_bpf_prog_array_maps(trace); + + if (trace->ev_qualifier_ids.nr > 0) { + err = trace__set_ev_qualifier_filter(trace); + if (err < 0) + goto out_errno; + + if (trace->syscalls.events.sys_exit) { + pr_debug("event qualifier tracepoint filter: %s\n", + trace->syscalls.events.sys_exit->filter); + } + } + + /* + * If the "close" syscall is not traced, then we will not have the + * opportunity to, in syscall_arg__scnprintf_close_fd() invalidate the + * fd->pathname table and were ending up showing the last value set by + * syscalls opening a pathname and associating it with a descriptor or + * reading it from /proc/pid/fd/ in cases where that doesn't make + * sense. + * + * So just disable this beautifier (SCA_FD, SCA_FDAT) when 'close' is + * not in use. + */ + trace->fd_path_disabled = !trace__syscall_enabled(trace, syscalltbl__id(trace->sctbl, "close")); + + err = trace__expand_filters(trace, &evsel); + if (err) + goto out_delete_evlist; + err = perf_evlist__apply_filters(evlist, &evsel); + if (err < 0) + goto out_error_apply_filters; + + if (trace->dump.map) + bpf_map__fprintf(trace->dump.map, trace->output); + + err = evlist__mmap(evlist, trace->opts.mmap_pages); + if (err < 0) + goto out_error_mmap; + + if (!target__none(&trace->opts.target) && !trace->opts.initial_delay) + evlist__enable(evlist); + + if (forks) + perf_evlist__start_workload(evlist); + + if (trace->opts.initial_delay) { + usleep(trace->opts.initial_delay * 1000); + evlist__enable(evlist); + } + + trace->multiple_threads = perf_thread_map__pid(evlist->core.threads, 0) == -1 || + evlist->core.threads->nr > 1 || + evlist__first(evlist)->core.attr.inherit; + + /* + * Now that we already used evsel->core.attr to ask the kernel to setup the + * events, lets reuse evsel->core.attr.sample_max_stack as the limit in + * trace__resolve_callchain(), allowing per-event max-stack settings + * to override an explicitly set --max-stack global setting. + */ + evlist__for_each_entry(evlist, evsel) { + if (evsel__has_callchain(evsel) && + evsel->core.attr.sample_max_stack == 0) + evsel->core.attr.sample_max_stack = trace->max_stack; + } +again: + before = trace->nr_events; + + for (i = 0; i < evlist->core.nr_mmaps; i++) { + union perf_event *event; + struct mmap *md; + + md = &evlist->mmap[i]; + if (perf_mmap__read_init(&md->core) < 0) + continue; + + while ((event = perf_mmap__read_event(&md->core)) != NULL) { + ++trace->nr_events; + + err = trace__deliver_event(trace, event); + if (err) + goto out_disable; + + perf_mmap__consume(&md->core); + + if (interrupted) + goto out_disable; + + if (done && !draining) { + evlist__disable(evlist); + draining = true; + } + } + perf_mmap__read_done(&md->core); + } + + if (trace->nr_events == before) { + int timeout = done ? 100 : -1; + + if (!draining && evlist__poll(evlist, timeout) > 0) { + if (evlist__filter_pollfd(evlist, POLLERR | POLLHUP | POLLNVAL) == 0) + draining = true; + + goto again; + } else { + if (trace__flush_events(trace)) + goto out_disable; + } + } else { + goto again; + } + +out_disable: + thread__zput(trace->current); + + evlist__disable(evlist); + + if (trace->sort_events) + ordered_events__flush(&trace->oe.data, OE_FLUSH__FINAL); + + if (!err) { + if (trace->summary) + trace__fprintf_thread_summary(trace, trace->output); + + if (trace->show_tool_stats) { + fprintf(trace->output, "Stats:\n " + " vfs_getname : %" PRIu64 "\n" + " proc_getname: %" PRIu64 "\n", + trace->stats.vfs_getname, + trace->stats.proc_getname); + } + } + +out_delete_evlist: + trace__symbols__exit(trace); + + evlist__delete(evlist); + cgroup__put(trace->cgroup); + trace->evlist = NULL; + trace->live = false; + return err; +{ + char errbuf[BUFSIZ]; + +out_error_sched_stat_runtime: + tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "sched", "sched_stat_runtime"); + goto out_error; + +out_error_raw_syscalls: + tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "raw_syscalls", "sys_(enter|exit)"); + goto out_error; + +out_error_mmap: + evlist__strerror_mmap(evlist, errno, errbuf, sizeof(errbuf)); + goto out_error; + +out_error_open: + 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, evsel__name(evsel), errno, + str_error_r(errno, errbuf, sizeof(errbuf))); + goto out_delete_evlist; +} +out_error_mem: + fprintf(trace->output, "Not enough memory to run!\n"); + goto out_delete_evlist; + +out_errno: + fprintf(trace->output, "errno=%d,%s\n", errno, strerror(errno)); + goto out_delete_evlist; +} + +static int trace__replay(struct trace *trace) +{ + const struct evsel_str_handler handlers[] = { + { "probe:vfs_getname", trace__vfs_getname, }, + }; + struct perf_data data = { + .path = input_name, + .mode = PERF_DATA_MODE_READ, + .force = trace->force, + }; + struct perf_session *session; + struct evsel *evsel; + int err = -1; + + trace->tool.sample = trace__process_sample; + trace->tool.mmap = perf_event__process_mmap; + trace->tool.mmap2 = perf_event__process_mmap2; + trace->tool.comm = perf_event__process_comm; + trace->tool.exit = perf_event__process_exit; + trace->tool.fork = perf_event__process_fork; + trace->tool.attr = perf_event__process_attr; + trace->tool.tracing_data = perf_event__process_tracing_data; + trace->tool.build_id = perf_event__process_build_id; + trace->tool.namespaces = perf_event__process_namespaces; + + trace->tool.ordered_events = true; + trace->tool.ordering_requires_timestamps = true; + + /* add tid to output */ + trace->multiple_threads = true; + + session = perf_session__new(&data, false, &trace->tool); + if (IS_ERR(session)) + return PTR_ERR(session); + + if (trace->opts.target.pid) + symbol_conf.pid_list_str = strdup(trace->opts.target.pid); + + if (trace->opts.target.tid) + symbol_conf.tid_list_str = strdup(trace->opts.target.tid); + + if (symbol__init(&session->header.env) < 0) + goto out; + + trace->host = &session->machines.host; + + err = perf_session__set_tracepoints_handlers(session, handlers); + if (err) + goto out; + + evsel = perf_evlist__find_tracepoint_by_name(session->evlist, + "raw_syscalls:sys_enter"); + /* older kernels have syscalls tp versus raw_syscalls */ + if (evsel == NULL) + evsel = perf_evlist__find_tracepoint_by_name(session->evlist, + "syscalls:sys_enter"); + + if (evsel && + (evsel__init_raw_syscall_tp(evsel, trace__sys_enter) < 0 || + perf_evsel__init_sc_tp_ptr_field(evsel, args))) { + pr_err("Error during initialize raw_syscalls:sys_enter event\n"); + goto out; + } + + evsel = perf_evlist__find_tracepoint_by_name(session->evlist, + "raw_syscalls:sys_exit"); + if (evsel == NULL) + evsel = perf_evlist__find_tracepoint_by_name(session->evlist, + "syscalls:sys_exit"); + if (evsel && + (evsel__init_raw_syscall_tp(evsel, trace__sys_exit) < 0 || + perf_evsel__init_sc_tp_uint_field(evsel, ret))) { + pr_err("Error during initialize raw_syscalls:sys_exit event\n"); + goto out; + } + + evlist__for_each_entry(session->evlist, evsel) { + if (evsel->core.attr.type == PERF_TYPE_SOFTWARE && + (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ || + evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MIN || + evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS)) + evsel->handler = trace__pgfault; + } + + setup_pager(); + + err = perf_session__process_events(session); + if (err) + pr_err("Failed to process events, error %d", err); + + else if (trace->summary) + trace__fprintf_thread_summary(trace, trace->output); + +out: + perf_session__delete(session); + + return err; +} + +static size_t trace__fprintf_threads_header(FILE *fp) +{ + size_t printed; + + printed = fprintf(fp, "\n Summary of events:\n\n"); + + return printed; +} + +DEFINE_RESORT_RB(syscall_stats, a->msecs > b->msecs, + struct syscall_stats *stats; + double msecs; + int syscall; +) +{ + struct int_node *source = rb_entry(nd, struct int_node, rb_node); + struct syscall_stats *stats = source->priv; + + entry->syscall = source->i; + entry->stats = stats; + entry->msecs = stats ? (u64)stats->stats.n * (avg_stats(&stats->stats) / NSEC_PER_MSEC) : 0; +} + +static size_t thread__dump_stats(struct thread_trace *ttrace, + struct trace *trace, FILE *fp) +{ + size_t printed = 0; + struct syscall *sc; + struct rb_node *nd; + DECLARE_RESORT_RB_INTLIST(syscall_stats, ttrace->syscall_stats); + + if (syscall_stats == NULL) + return 0; + + printed += fprintf(fp, "\n"); + + printed += fprintf(fp, " syscall calls errors total min avg max stddev\n"); + printed += fprintf(fp, " (msec) (msec) (msec) (msec) (%%)\n"); + printed += fprintf(fp, " --------------- -------- ------ -------- --------- --------- --------- ------\n"); + + resort_rb__for_each_entry(nd, syscall_stats) { + struct syscall_stats *stats = syscall_stats_entry->stats; + if (stats) { + double min = (double)(stats->stats.min) / NSEC_PER_MSEC; + double max = (double)(stats->stats.max) / NSEC_PER_MSEC; + double avg = avg_stats(&stats->stats); + double pct; + u64 n = (u64)stats->stats.n; + + pct = avg ? 100.0 * stddev_stats(&stats->stats) / avg : 0.0; + avg /= NSEC_PER_MSEC; + + sc = &trace->syscalls.table[syscall_stats_entry->syscall]; + printed += fprintf(fp, " %-15s", sc->name); + printed += fprintf(fp, " %8" PRIu64 " %6" PRIu64 " %9.3f %9.3f %9.3f", + n, stats->nr_failures, syscall_stats_entry->msecs, min, avg); + printed += fprintf(fp, " %9.3f %9.2f%%\n", max, pct); + + if (trace->errno_summary && stats->nr_failures) { + const char *arch_name = perf_env__arch(trace->host->env); + int e; + + for (e = 0; e < stats->max_errno; ++e) { + if (stats->errnos[e] != 0) + fprintf(fp, "\t\t\t\t%s: %d\n", arch_syscalls__strerrno(arch_name, e + 1), stats->errnos[e]); + } + } + } + } + + resort_rb__delete(syscall_stats); + printed += fprintf(fp, "\n\n"); + + return printed; +} + +static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trace *trace) +{ + size_t printed = 0; + struct thread_trace *ttrace = thread__priv(thread); + double ratio; + + if (ttrace == NULL) + return 0; + + ratio = (double)ttrace->nr_events / trace->nr_events * 100.0; + + printed += fprintf(fp, " %s (%d), ", thread__comm_str(thread), thread->tid); + printed += fprintf(fp, "%lu events, ", ttrace->nr_events); + printed += fprintf(fp, "%.1f%%", ratio); + if (ttrace->pfmaj) + printed += fprintf(fp, ", %lu majfaults", ttrace->pfmaj); + if (ttrace->pfmin) + printed += fprintf(fp, ", %lu minfaults", ttrace->pfmin); + if (trace->sched) + printed += fprintf(fp, ", %.3f msec\n", ttrace->runtime_ms); + else if (fputc('\n', fp) != EOF) + ++printed; + + printed += thread__dump_stats(ttrace, trace, fp); + + return printed; +} + +static unsigned long thread__nr_events(struct thread_trace *ttrace) +{ + return ttrace ? ttrace->nr_events : 0; +} + +DEFINE_RESORT_RB(threads, (thread__nr_events(a->thread->priv) < thread__nr_events(b->thread->priv)), + struct thread *thread; +) +{ + entry->thread = rb_entry(nd, struct thread, rb_node); +} + +static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp) +{ + size_t printed = trace__fprintf_threads_header(fp); + struct rb_node *nd; + int i; + + for (i = 0; i < THREADS__TABLE_SIZE; i++) { + DECLARE_RESORT_RB_MACHINE_THREADS(threads, trace->host, i); + + if (threads == NULL) { + fprintf(fp, "%s", "Error sorting output by nr_events!\n"); + return 0; + } + + resort_rb__for_each_entry(nd, threads) + printed += trace__fprintf_thread(fp, threads_entry->thread, trace); + + resort_rb__delete(threads); + } + return printed; +} + +static int trace__set_duration(const struct option *opt, const char *str, + int unset __maybe_unused) +{ + struct trace *trace = opt->value; + + trace->duration_filter = atof(str); + return 0; +} + +static int trace__set_filter_pids_from_option(const struct option *opt, const char *str, + int unset __maybe_unused) +{ + int ret = -1; + size_t i; + struct trace *trace = opt->value; + /* + * FIXME: introduce a intarray class, plain parse csv and create a + * { int nr, int entries[] } struct... + */ + struct intlist *list = intlist__new(str); + + if (list == NULL) + return -1; + + i = trace->filter_pids.nr = intlist__nr_entries(list) + 1; + trace->filter_pids.entries = calloc(i, sizeof(pid_t)); + + if (trace->filter_pids.entries == NULL) + goto out; + + trace->filter_pids.entries[0] = getpid(); + + for (i = 1; i < trace->filter_pids.nr; ++i) + trace->filter_pids.entries[i] = intlist__entry(list, i - 1)->i; + + intlist__delete(list); + ret = 0; +out: + return ret; +} + +static int trace__open_output(struct trace *trace, const char *filename) +{ + struct stat st; + + if (!stat(filename, &st) && st.st_size) { + char oldname[PATH_MAX]; + + scnprintf(oldname, sizeof(oldname), "%s.old", filename); + unlink(oldname); + rename(filename, oldname); + } + + trace->output = fopen(filename, "w"); + + return trace->output == NULL ? -errno : 0; +} + +static int parse_pagefaults(const struct option *opt, const char *str, + int unset __maybe_unused) +{ + int *trace_pgfaults = opt->value; + + if (strcmp(str, "all") == 0) + *trace_pgfaults |= TRACE_PFMAJ | TRACE_PFMIN; + else if (strcmp(str, "maj") == 0) + *trace_pgfaults |= TRACE_PFMAJ; + else if (strcmp(str, "min") == 0) + *trace_pgfaults |= TRACE_PFMIN; + else + return -1; + + return 0; +} + +static void evlist__set_default_evsel_handler(struct evlist *evlist, void *handler) +{ + struct evsel *evsel; + + evlist__for_each_entry(evlist, evsel) { + if (evsel->handler == NULL) + evsel->handler = handler; + } +} + +static void evsel__set_syscall_arg_fmt(struct evsel *evsel, const char *name) +{ + struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel); + + if (fmt) { + struct syscall_fmt *scfmt = syscall_fmt__find(name); + + if (scfmt) { + int skip = 0; + + if (strcmp(evsel->tp_format->format.fields->name, "__syscall_nr") == 0 || + strcmp(evsel->tp_format->format.fields->name, "nr") == 0) + ++skip; + + memcpy(fmt + skip, scfmt->arg, (evsel->tp_format->format.nr_fields - skip) * sizeof(*fmt)); + } + } +} + +static int evlist__set_syscall_tp_fields(struct evlist *evlist) +{ + struct evsel *evsel; + + evlist__for_each_entry(evlist, evsel) { + if (evsel->priv || !evsel->tp_format) + continue; + + if (strcmp(evsel->tp_format->system, "syscalls")) { + evsel__init_tp_arg_scnprintf(evsel); + continue; + } + + if (evsel__init_syscall_tp(evsel)) + return -1; + + if (!strncmp(evsel->tp_format->name, "sys_enter_", 10)) { + struct syscall_tp *sc = __evsel__syscall_tp(evsel); + + if (__tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64))) + return -1; + + evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_enter_") - 1); + } else if (!strncmp(evsel->tp_format->name, "sys_exit_", 9)) { + struct syscall_tp *sc = __evsel__syscall_tp(evsel); + + if (__tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap)) + return -1; + + evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_exit_") - 1); + } + } + + return 0; +} + +/* + * XXX: Hackish, just splitting the combined -e+--event (syscalls + * (raw_syscalls:{sys_{enter,exit}} + events (tracepoints, HW, SW, etc) to use + * existing facilities unchanged (trace->ev_qualifier + parse_options()). + * + * It'd be better to introduce a parse_options() variant that would return a + * list with the terms it didn't match to an event... + */ +static int trace__parse_events_option(const struct option *opt, const char *str, + int unset __maybe_unused) +{ + struct trace *trace = (struct trace *)opt->value; + const char *s = str; + char *sep = NULL, *lists[2] = { NULL, NULL, }; + int len = strlen(str) + 1, err = -1, list, idx; + char *strace_groups_dir = system_path(STRACE_GROUPS_DIR); + char group_name[PATH_MAX]; + struct syscall_fmt *fmt; + + if (strace_groups_dir == NULL) + return -1; + + if (*s == '!') { + ++s; + trace->not_ev_qualifier = true; + } + + while (1) { + if ((sep = strchr(s, ',')) != NULL) + *sep = '\0'; + + list = 0; + if (syscalltbl__id(trace->sctbl, s) >= 0 || + syscalltbl__strglobmatch_first(trace->sctbl, s, &idx) >= 0) { + list = 1; + goto do_concat; + } + + fmt = syscall_fmt__find_by_alias(s); + if (fmt != NULL) { + list = 1; + s = fmt->name; + } else { + path__join(group_name, sizeof(group_name), strace_groups_dir, s); + if (access(group_name, R_OK) == 0) + list = 1; + } +do_concat: + if (lists[list]) { + sprintf(lists[list] + strlen(lists[list]), ",%s", s); + } else { + lists[list] = malloc(len); + if (lists[list] == NULL) + goto out; + strcpy(lists[list], s); + } + + if (!sep) + break; + + *sep = ','; + s = sep + 1; + } + + if (lists[1] != NULL) { + struct strlist_config slist_config = { + .dirname = strace_groups_dir, + }; + + trace->ev_qualifier = strlist__new(lists[1], &slist_config); + if (trace->ev_qualifier == NULL) { + fputs("Not enough memory to parse event qualifier", trace->output); + goto out; + } + + if (trace__validate_ev_qualifier(trace)) + goto out; + trace->trace_syscalls = true; + } + + err = 0; + + if (lists[0]) { + struct option o = { + .value = &trace->evlist, + }; + err = parse_events_option(&o, lists[0], 0); + } +out: + if (sep) + *sep = ','; + + return err; +} + +static int trace__parse_cgroups(const struct option *opt, const char *str, int unset) +{ + struct trace *trace = opt->value; + + if (!list_empty(&trace->evlist->core.entries)) { + struct option o = { + .value = &trace->evlist, + }; + return parse_cgroups(&o, str, unset); + } + trace->cgroup = evlist__findnew_cgroup(trace->evlist, str); + + return 0; +} + +static int trace__config(const char *var, const char *value, void *arg) +{ + struct trace *trace = arg; + int err = 0; + + if (!strcmp(var, "trace.add_events")) { + trace->perfconfig_events = strdup(value); + if (trace->perfconfig_events == NULL) { + pr_err("Not enough memory for %s\n", "trace.add_events"); + return -1; + } + } else if (!strcmp(var, "trace.show_timestamp")) { + trace->show_tstamp = perf_config_bool(var, value); + } else if (!strcmp(var, "trace.show_duration")) { + trace->show_duration = perf_config_bool(var, value); + } else if (!strcmp(var, "trace.show_arg_names")) { + trace->show_arg_names = perf_config_bool(var, value); + if (!trace->show_arg_names) + trace->show_zeros = true; + } else if (!strcmp(var, "trace.show_zeros")) { + bool new_show_zeros = perf_config_bool(var, value); + if (!trace->show_arg_names && !new_show_zeros) { + pr_warning("trace.show_zeros has to be set when trace.show_arg_names=no\n"); + goto out; + } + trace->show_zeros = new_show_zeros; + } else if (!strcmp(var, "trace.show_prefix")) { + trace->show_string_prefix = perf_config_bool(var, value); + } else if (!strcmp(var, "trace.no_inherit")) { + trace->opts.no_inherit = perf_config_bool(var, value); + } else if (!strcmp(var, "trace.args_alignment")) { + int args_alignment = 0; + if (perf_config_int(&args_alignment, var, value) == 0) + trace->args_alignment = args_alignment; + } else if (!strcmp(var, "trace.tracepoint_beautifiers")) { + if (strcasecmp(value, "libtraceevent") == 0) + trace->libtraceevent_print = true; + else if (strcasecmp(value, "libbeauty") == 0) + trace->libtraceevent_print = false; + } +out: + return err; +} + +int cmd_trace(int argc, const char **argv) +{ + const char *trace_usage[] = { + "perf trace [<options>] [<command>]", + "perf trace [<options>] -- <command> [<options>]", + "perf trace record [<options>] [<command>]", + "perf trace record [<options>] -- <command> [<options>]", + NULL + }; + struct trace trace = { + .opts = { + .target = { + .uid = UINT_MAX, + .uses_mmap = true, + }, + .user_freq = UINT_MAX, + .user_interval = ULLONG_MAX, + .no_buffering = true, + .mmap_pages = UINT_MAX, + }, + .output = stderr, + .show_comm = true, + .show_tstamp = true, + .show_duration = true, + .show_arg_names = true, + .args_alignment = 70, + .trace_syscalls = false, + .kernel_syscallchains = false, + .max_stack = UINT_MAX, + .max_events = ULONG_MAX, + }; + const char *map_dump_str = NULL; + const char *output_name = NULL; + const struct option trace_options[] = { + OPT_CALLBACK('e', "event", &trace, "event", + "event/syscall selector. use 'perf list' to list available events", + trace__parse_events_option), + OPT_CALLBACK(0, "filter", &trace.evlist, "filter", + "event filter", parse_filter), + OPT_BOOLEAN(0, "comm", &trace.show_comm, + "show the thread COMM next to its id"), + OPT_BOOLEAN(0, "tool_stats", &trace.show_tool_stats, "show tool stats"), + OPT_CALLBACK(0, "expr", &trace, "expr", "list of syscalls/events to trace", + trace__parse_events_option), + OPT_STRING('o', "output", &output_name, "file", "output file name"), + OPT_STRING('i', "input", &input_name, "file", "Analyze events in file"), + OPT_STRING('p', "pid", &trace.opts.target.pid, "pid", + "trace events on existing process id"), + OPT_STRING('t', "tid", &trace.opts.target.tid, "tid", + "trace events on existing thread id"), + OPT_CALLBACK(0, "filter-pids", &trace, "CSV list of pids", + "pids to filter (by the kernel)", trace__set_filter_pids_from_option), + OPT_BOOLEAN('a', "all-cpus", &trace.opts.target.system_wide, + "system-wide collection from all CPUs"), + OPT_STRING('C', "cpu", &trace.opts.target.cpu_list, "cpu", + "list of cpus to monitor"), + OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit, + "child tasks do not inherit counters"), + OPT_CALLBACK('m', "mmap-pages", &trace.opts.mmap_pages, "pages", + "number of mmap data pages", + perf_evlist__parse_mmap_pages), + OPT_STRING('u', "uid", &trace.opts.target.uid_str, "user", + "user to profile"), + OPT_CALLBACK(0, "duration", &trace, "float", + "show only events with duration > N.M ms", + trace__set_duration), +#ifdef HAVE_LIBBPF_SUPPORT + OPT_STRING(0, "map-dump", &map_dump_str, "BPF map", "BPF map to periodically dump"), +#endif + OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"), + OPT_INCR('v', "verbose", &verbose, "be more verbose"), + OPT_BOOLEAN('T', "time", &trace.full_time, + "Show full timestamp, not time relative to first start"), + OPT_BOOLEAN(0, "failure", &trace.failure_only, + "Show only syscalls that failed"), + OPT_BOOLEAN('s', "summary", &trace.summary_only, + "Show only syscall summary with statistics"), + OPT_BOOLEAN('S', "with-summary", &trace.summary, + "Show all syscalls and summary with statistics"), + OPT_BOOLEAN(0, "errno-summary", &trace.errno_summary, + "Show errno stats per syscall, use with -s or -S"), + OPT_CALLBACK_DEFAULT('F', "pf", &trace.trace_pgfaults, "all|maj|min", + "Trace pagefaults", parse_pagefaults, "maj"), + OPT_BOOLEAN(0, "syscalls", &trace.trace_syscalls, "Trace syscalls"), + OPT_BOOLEAN('f', "force", &trace.force, "don't complain, do it"), + OPT_CALLBACK(0, "call-graph", &trace.opts, + "record_mode[,record_size]", record_callchain_help, + &record_parse_callchain_opt), + OPT_BOOLEAN(0, "libtraceevent_print", &trace.libtraceevent_print, + "Use libtraceevent to print the tracepoint arguments."), + OPT_BOOLEAN(0, "kernel-syscall-graph", &trace.kernel_syscallchains, + "Show the kernel callchains on the syscall exit path"), + OPT_ULONG(0, "max-events", &trace.max_events, + "Set the maximum number of events to print, exit after that is reached. "), + OPT_UINTEGER(0, "min-stack", &trace.min_stack, + "Set the minimum stack depth when parsing the callchain, " + "anything below the specified depth will be ignored."), + OPT_UINTEGER(0, "max-stack", &trace.max_stack, + "Set the maximum stack depth when parsing the callchain, " + "anything beyond the specified depth will be ignored. " + "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)), + OPT_BOOLEAN(0, "sort-events", &trace.sort_events, + "Sort batch of events before processing, use if getting out of order events"), + OPT_BOOLEAN(0, "print-sample", &trace.print_sample, + "print the PERF_RECORD_SAMPLE PERF_SAMPLE_ info, for debugging"), + OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout, + "per thread proc mmap processing timeout in ms"), + OPT_CALLBACK('G', "cgroup", &trace, "name", "monitor event in cgroup name only", + trace__parse_cgroups), + OPT_INTEGER('D', "delay", &trace.opts.initial_delay, + "ms to wait before starting measurement after program " + "start"), + OPTS_EVSWITCH(&trace.evswitch), + OPT_END() + }; + bool __maybe_unused max_stack_user_set = true; + bool mmap_pages_user_set = true; + struct evsel *evsel; + const char * const trace_subcommands[] = { "record", NULL }; + int err = -1; + char bf[BUFSIZ]; + + signal(SIGSEGV, sighandler_dump_stack); + signal(SIGFPE, sighandler_dump_stack); + + trace.evlist = evlist__new(); + trace.sctbl = syscalltbl__new(); + + if (trace.evlist == NULL || trace.sctbl == NULL) { + pr_err("Not enough memory to run!\n"); + err = -ENOMEM; + goto out; + } + + /* + * Parsing .perfconfig may entail creating a BPF event, that may need + * to create BPF maps, so bump RLIM_MEMLOCK as the default 64K setting + * is too small. This affects just this process, not touching the + * global setting. If it fails we'll get something in 'perf trace -v' + * to help diagnose the problem. + */ + rlimit__bump_memlock(); + + err = perf_config(trace__config, &trace); + if (err) + goto out; + + argc = parse_options_subcommand(argc, argv, trace_options, trace_subcommands, + trace_usage, PARSE_OPT_STOP_AT_NON_OPTION); + + /* + * Here we already passed thru trace__parse_events_option() and it has + * already figured out if -e syscall_name, if not but if --event + * foo:bar was used, the user is interested _just_ in those, say, + * tracepoint events, not in the strace-like syscall-name-based mode. + * + * This is important because we need to check if strace-like mode is + * needed to decided if we should filter out the eBPF + * __augmented_syscalls__ code, if it is in the mix, say, via + * .perfconfig trace.add_events, and filter those out. + */ + if (!trace.trace_syscalls && !trace.trace_pgfaults && + trace.evlist->core.nr_entries == 0 /* Was --events used? */) { + trace.trace_syscalls = true; + } + /* + * Now that we have --verbose figured out, lets see if we need to parse + * events from .perfconfig, so that if those events fail parsing, say some + * BPF program fails, then we'll be able to use --verbose to see what went + * wrong in more detail. + */ + if (trace.perfconfig_events != NULL) { + struct parse_events_error parse_err; + + bzero(&parse_err, sizeof(parse_err)); + err = parse_events(trace.evlist, trace.perfconfig_events, &parse_err); + if (err) { + parse_events_print_error(&parse_err, trace.perfconfig_events); + goto out; + } + } + + if ((nr_cgroups || trace.cgroup) && !trace.opts.target.system_wide) { + usage_with_options_msg(trace_usage, trace_options, + "cgroup monitoring only available in system-wide mode"); + } + + evsel = bpf__setup_output_event(trace.evlist, "__augmented_syscalls__"); + if (IS_ERR(evsel)) { + bpf__strerror_setup_output_event(trace.evlist, PTR_ERR(evsel), bf, sizeof(bf)); + pr_err("ERROR: Setup trace syscalls enter failed: %s\n", bf); + goto out; + } + + if (evsel) { + trace.syscalls.events.augmented = evsel; + + evsel = perf_evlist__find_tracepoint_by_name(trace.evlist, "raw_syscalls:sys_enter"); + if (evsel == NULL) { + pr_err("ERROR: raw_syscalls:sys_enter not found in the augmented BPF object\n"); + goto out; + } + + if (evsel->bpf_obj == NULL) { + pr_err("ERROR: raw_syscalls:sys_enter not associated to a BPF object\n"); + goto out; + } + + trace.bpf_obj = evsel->bpf_obj; + + /* + * If we have _just_ the augmenter event but don't have a + * explicit --syscalls, then assume we want all strace-like + * syscalls: + */ + if (!trace.trace_syscalls && trace__only_augmented_syscalls_evsels(&trace)) + trace.trace_syscalls = true; + /* + * So, if we have a syscall augmenter, but trace_syscalls, aka + * strace-like syscall tracing is not set, then we need to trow + * away the augmenter, i.e. all the events that were created + * from that BPF object file. + * + * This is more to fix the current .perfconfig trace.add_events + * style of setting up the strace-like eBPF based syscall point + * payload augmenter. + * + * All this complexity will be avoided by adding an alternative + * to trace.add_events in the form of + * trace.bpf_augmented_syscalls, that will be only parsed if we + * need it. + * + * .perfconfig trace.add_events is still useful if we want, for + * instance, have msr_write.msr in some .perfconfig profile based + * 'perf trace --config determinism.profile' mode, where for some + * particular goal/workload type we want a set of events and + * output mode (with timings, etc) instead of having to add + * all via the command line. + * + * Also --config to specify an alternate .perfconfig file needs + * to be implemented. + */ + if (!trace.trace_syscalls) { + trace__delete_augmented_syscalls(&trace); + } else { + trace__set_bpf_map_filtered_pids(&trace); + trace__set_bpf_map_syscalls(&trace); + trace.syscalls.unaugmented_prog = trace__find_bpf_program_by_title(&trace, "!raw_syscalls:unaugmented"); + } + } + + err = bpf__setup_stdout(trace.evlist); + if (err) { + bpf__strerror_setup_stdout(trace.evlist, err, bf, sizeof(bf)); + pr_err("ERROR: Setup BPF stdout failed: %s\n", bf); + goto out; + } + + err = -1; + + if (map_dump_str) { + trace.dump.map = trace__find_bpf_map_by_name(&trace, map_dump_str); + if (trace.dump.map == NULL) { + pr_err("ERROR: BPF map \"%s\" not found\n", map_dump_str); + goto out; + } + } + + if (trace.trace_pgfaults) { + trace.opts.sample_address = true; + trace.opts.sample_time = true; + } + + if (trace.opts.mmap_pages == UINT_MAX) + mmap_pages_user_set = false; + + if (trace.max_stack == UINT_MAX) { + trace.max_stack = input_name ? PERF_MAX_STACK_DEPTH : sysctl__max_stack(); + max_stack_user_set = false; + } + +#ifdef HAVE_DWARF_UNWIND_SUPPORT + if ((trace.min_stack || max_stack_user_set) && !callchain_param.enabled) { + record_opts__parse_callchain(&trace.opts, &callchain_param, "dwarf", false); + } +#endif + + if (callchain_param.enabled) { + if (!mmap_pages_user_set && geteuid() == 0) + trace.opts.mmap_pages = perf_event_mlock_kb_in_pages() * 4; + + symbol_conf.use_callchain = true; + } + + if (trace.evlist->core.nr_entries > 0) { + evlist__set_default_evsel_handler(trace.evlist, trace__event_handler); + if (evlist__set_syscall_tp_fields(trace.evlist)) { + perror("failed to set syscalls:* tracepoint fields"); + goto out; + } + } + + if (trace.sort_events) { + ordered_events__init(&trace.oe.data, ordered_events__deliver_event, &trace); + ordered_events__set_copy_on_queue(&trace.oe.data, true); + } + + /* + * If we are augmenting syscalls, then combine what we put in the + * __augmented_syscalls__ BPF map with what is in the + * syscalls:sys_exit_FOO tracepoints, i.e. just like we do without BPF, + * combining raw_syscalls:sys_enter with raw_syscalls:sys_exit. + * + * We'll switch to look at two BPF maps, one for sys_enter and the + * other for sys_exit when we start augmenting the sys_exit paths with + * buffers that are being copied from kernel to userspace, think 'read' + * syscall. + */ + if (trace.syscalls.events.augmented) { + evlist__for_each_entry(trace.evlist, evsel) { + bool raw_syscalls_sys_exit = strcmp(evsel__name(evsel), "raw_syscalls:sys_exit") == 0; + + if (raw_syscalls_sys_exit) { + trace.raw_augmented_syscalls = true; + goto init_augmented_syscall_tp; + } + + if (trace.syscalls.events.augmented->priv == NULL && + strstr(evsel__name(evsel), "syscalls:sys_enter")) { + struct evsel *augmented = trace.syscalls.events.augmented; + if (evsel__init_augmented_syscall_tp(augmented, evsel) || + evsel__init_augmented_syscall_tp_args(augmented)) + goto out; + /* + * Augmented is __augmented_syscalls__ BPF_OUTPUT event + * Above we made sure we can get from the payload the tp fields + * that we get from syscalls:sys_enter tracefs format file. + */ + augmented->handler = trace__sys_enter; + /* + * Now we do the same for the *syscalls:sys_enter event so that + * if we handle it directly, i.e. if the BPF prog returns 0 so + * as not to filter it, then we'll handle it just like we would + * for the BPF_OUTPUT one: + */ + if (evsel__init_augmented_syscall_tp(evsel, evsel) || + evsel__init_augmented_syscall_tp_args(evsel)) + goto out; + evsel->handler = trace__sys_enter; + } + + if (strstarts(evsel__name(evsel), "syscalls:sys_exit_")) { + struct syscall_tp *sc; +init_augmented_syscall_tp: + if (evsel__init_augmented_syscall_tp(evsel, evsel)) + goto out; + sc = __evsel__syscall_tp(evsel); + /* + * For now with BPF raw_augmented we hook into + * raw_syscalls:sys_enter and there we get all + * 6 syscall args plus the tracepoint common + * fields and the syscall_nr (another long). + * So we check if that is the case and if so + * don't look after the sc->args_size but + * always after the full raw_syscalls:sys_enter + * payload, which is fixed. + * + * We'll revisit this later to pass + * s->args_size to the BPF augmenter (now + * tools/perf/examples/bpf/augmented_raw_syscalls.c, + * so that it copies only what we need for each + * syscall, like what happens when we use + * syscalls:sys_enter_NAME, so that we reduce + * the kernel/userspace traffic to just what is + * needed for each syscall. + */ + if (trace.raw_augmented_syscalls) + trace.raw_augmented_syscalls_args_size = (6 + 1) * sizeof(long) + sc->id.offset; + evsel__init_augmented_syscall_tp_ret(evsel); + evsel->handler = trace__sys_exit; + } + } + } + + if ((argc >= 1) && (strcmp(argv[0], "record") == 0)) + return trace__record(&trace, argc-1, &argv[1]); + + /* Using just --errno-summary will trigger --summary */ + if (trace.errno_summary && !trace.summary && !trace.summary_only) + trace.summary_only = true; + + /* summary_only implies summary option, but don't overwrite summary if set */ + if (trace.summary_only) + trace.summary = trace.summary_only; + + if (output_name != NULL) { + err = trace__open_output(&trace, output_name); + if (err < 0) { + perror("failed to create output file"); + goto out; + } + } + + err = evswitch__init(&trace.evswitch, trace.evlist, stderr); + if (err) + goto out_close; + + err = target__validate(&trace.opts.target); + if (err) { + target__strerror(&trace.opts.target, err, bf, sizeof(bf)); + fprintf(trace.output, "%s", bf); + goto out_close; + } + + err = target__parse_uid(&trace.opts.target); + if (err) { + target__strerror(&trace.opts.target, err, bf, sizeof(bf)); + fprintf(trace.output, "%s", bf); + goto out_close; + } + + if (!argc && target__none(&trace.opts.target)) + trace.opts.target.system_wide = true; + + if (input_name) + err = trace__replay(&trace); + else + err = trace__run(&trace, argc, argv); + +out_close: + if (output_name != NULL) + fclose(trace.output); +out: + zfree(&trace.perfconfig_events); + return err; +} |