diff options
Diffstat (limited to 'tools/perf/builtin-trace.c')
| -rw-r--r-- | tools/perf/builtin-trace.c | 3289 |
1 files changed, 2564 insertions, 725 deletions
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index ed4583128b9c..baee1f695600 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -12,23 +12,37 @@ * Initially based on the 'trace' prototype by Thomas Gleixner: * * http://lwn.net/Articles/415728/ ("Announcing a new utility: 'trace'") - * - * Released under the GPL v2. (and only v2, not any later version) */ -#include <traceevent/event-parse.h> +#include "util/record.h" #include <api/fs/tracing_path.h> +#ifdef HAVE_LIBBPF_SUPPORT #include <bpf/bpf.h> +#include <bpf/libbpf.h> +#include <bpf/btf.h> +#endif +#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/hashmap.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" @@ -37,15 +51,20 @@ #include "util/intlist.h" #include "util/thread_map.h" #include "util/stat.h" +#include "util/tool.h" +#include "util/trace.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 "util/tracepoint.h" #include "callchain.h" #include "print_binary.h" #include "string2.h" #include "syscalltbl.h" -#include "rb_resort.h" +#include "../perf.h" +#include "trace_augment.h" +#include "dwarf-regs.h" #include <errno.h> #include <inttypes.h> @@ -56,13 +75,21 @@ #include <linux/err.h> #include <linux/filter.h> #include <linux/kernel.h> +#include <linux/list_sort.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 "sane_ctype.h" +#include <linux/ctype.h> +#include <perf/mmap.h> +#include <tools/libc_compat.h> + +#ifdef HAVE_LIBTRACEEVENT +#include <event-parse.h> +#endif #ifndef O_CLOEXEC # define O_CLOEXEC 02000000 @@ -72,21 +99,65 @@ # 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 + * + * We have to explicitely mark the direction of the flow of data, if from the + * kernel to user space or the other way around, since the BPF collector we + * have so far copies only from user to kernel space, mark the arguments that + * go that direction, so that we don´t end up collecting the previous contents + * for syscall args that goes from kernel to user space. + */ +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 from_user; + bool show_zero; +#ifdef HAVE_LIBBPF_SUPPORT + const struct btf_type *type; + int type_id; /* used in btf_dump */ +#endif +}; + +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_env host_env; struct perf_tool tool; - struct syscalltbl *sctbl; struct { - int max; - struct syscall *table; - struct bpf_map *map; + /** Sorted sycall numbers used by the trace. */ + struct syscall **table; + /** Size of table. */ + size_t table_size; struct { - struct perf_evsel *sys_enter, - *sys_exit, - *augmented; + struct evsel *sys_enter, + *sys_exit, + *bpf_output; } events; } syscalls; +#ifdef HAVE_LIBBPF_SUPPORT + struct btf *btf; +#endif struct record_opts opts; - struct perf_evlist *evlist; + struct evlist *evlist; struct machine *host; struct thread *current; struct cgroup *cgroup; @@ -95,6 +166,7 @@ struct trace { unsigned long nr_events; unsigned long nr_events_printed; unsigned long max_events; + struct evswitch evswitch; struct strlist *ev_qualifier; struct { size_t nr; @@ -105,16 +177,29 @@ struct trace { pid_t *entries; struct bpf_map *map; } filter_pids; + /* + * TODO: The map is from an ID (aka system call number) to struct + * syscall_stats. If there is >1 e_machine, such as i386 and x86-64 + * processes, then the stats here will gather wrong the statistics for + * the non EM_HOST system calls. A fix would be to add the e_machine + * into the key, but this would make the code inconsistent with the + * per-thread version. + */ + struct hashmap *syscall_stats; double duration_filter; double runtime_ms; + unsigned long pfmaj, pfmin; struct { u64 vfs_getname, proc_getname; } stats; unsigned int max_stack; unsigned int min_stack; + enum trace_summary_mode summary_mode; + int max_summary; int raw_augmented_syscalls_args_size; bool raw_augmented_syscalls; + bool fd_path_disabled; bool sort_events; bool not_ev_qualifier; bool live; @@ -123,11 +208,13 @@ struct trace { 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; @@ -137,13 +224,31 @@ struct trace { bool show_string_prefix; bool force; bool vfs_getname; + bool force_btf; + bool summary_bpf; int trace_pgfaults; + char *perfconfig_events; struct { struct ordered_events data; u64 last; } oe; + const char *uid_str; }; +static void trace__load_vmlinux_btf(struct trace *trace __maybe_unused) +{ +#ifdef HAVE_LIBBPF_SUPPORT + if (trace->btf != NULL) + return; + + trace->btf = btf__load_vmlinux_btf(); + if (verbose > 0) { + fprintf(trace->output, trace->btf ? "vmlinux BTF loaded\n" : + "Failed to load vmlinux BTF\n"); + } +#endif +} + struct tp_field { int offset; union { @@ -230,11 +335,95 @@ struct syscall_tp { }; }; -static int perf_evsel__init_tp_uint_field(struct perf_evsel *evsel, - struct tp_field *field, - const char *name) +/* + * 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) { + const struct tep_event *tp_format = evsel__tp_format(evsel); + + if (tp_format == NULL) + goto out_delete; + + et->fmt = calloc(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 = perf_evsel__field(evsel, name); + struct tep_format_field *format_field = evsel__field(evsel, name); if (format_field == NULL) return -1; @@ -243,14 +432,12 @@ static int perf_evsel__init_tp_uint_field(struct perf_evsel *evsel, } #define perf_evsel__init_sc_tp_uint_field(evsel, name) \ - ({ struct syscall_tp *sc = evsel->priv;\ - perf_evsel__init_tp_uint_field(evsel, &sc->name, #name); }) + ({ struct syscall_tp *sc = __evsel__syscall_tp(evsel);\ + evsel__init_tp_uint_field(evsel, &sc->name, #name); }) -static int perf_evsel__init_tp_ptr_field(struct perf_evsel *evsel, - struct tp_field *field, - const char *name) +static int evsel__init_tp_ptr_field(struct evsel *evsel, struct tp_field *field, const char *name) { - struct tep_format_field *format_field = perf_evsel__field(evsel, name); + struct tep_format_field *format_field = evsel__field(evsel, name); if (format_field == NULL) return -1; @@ -259,115 +446,118 @@ static int perf_evsel__init_tp_ptr_field(struct perf_evsel *evsel, } #define perf_evsel__init_sc_tp_ptr_field(evsel, name) \ - ({ struct syscall_tp *sc = evsel->priv;\ - perf_evsel__init_tp_ptr_field(evsel, &sc->name, #name); }) + ({ struct syscall_tp *sc = __evsel__syscall_tp(evsel);\ + evsel__init_tp_ptr_field(evsel, &sc->name, #name); }) -static void perf_evsel__delete_priv(struct perf_evsel *evsel) +static void evsel__delete_priv(struct evsel *evsel) { zfree(&evsel->priv); - perf_evsel__delete(evsel); + evsel__delete(evsel); } -static int perf_evsel__init_syscall_tp(struct perf_evsel *evsel) +static int evsel__init_syscall_tp(struct evsel *evsel) { - struct syscall_tp *sc = evsel->priv = malloc(sizeof(struct syscall_tp)); + 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; - if (evsel->priv != NULL) { - if (perf_evsel__init_tp_uint_field(evsel, &sc->id, "__syscall_nr") && - perf_evsel__init_tp_uint_field(evsel, &sc->id, "nr")) - goto out_delete; return 0; } return -ENOMEM; -out_delete: - zfree(&evsel->priv); - return -ENOENT; } -static int perf_evsel__init_augmented_syscall_tp(struct perf_evsel *evsel, struct perf_evsel *tp) +static int evsel__init_augmented_syscall_tp(struct evsel *evsel, struct evsel *tp) { - struct syscall_tp *sc = evsel->priv = malloc(sizeof(struct syscall_tp)); + struct syscall_tp *sc = evsel__syscall_tp(evsel); - if (evsel->priv != NULL) { - struct tep_format_field *syscall_id = perf_evsel__field(tp, "id"); + if (sc != NULL) { + struct tep_format_field *syscall_id = evsel__field(tp, "id"); if (syscall_id == NULL) - syscall_id = perf_evsel__field(tp, "__syscall_nr"); - if (syscall_id == NULL) - goto out_delete; - if (__tp_field__init_uint(&sc->id, syscall_id->size, syscall_id->offset, evsel->needs_swap)) - goto out_delete; + 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; -out_delete: - zfree(&evsel->priv); - return -EINVAL; } -static int perf_evsel__init_augmented_syscall_tp_args(struct perf_evsel *evsel) +static int evsel__init_augmented_syscall_tp_args(struct evsel *evsel) { - struct syscall_tp *sc = evsel->priv; + struct syscall_tp *sc = __evsel__syscall_tp(evsel); return __tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64)); } -static int perf_evsel__init_augmented_syscall_tp_ret(struct perf_evsel *evsel) +static int evsel__init_augmented_syscall_tp_ret(struct evsel *evsel) { - struct syscall_tp *sc = evsel->priv; + 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 perf_evsel__init_raw_syscall_tp(struct perf_evsel *evsel, void *handler) +static int evsel__init_raw_syscall_tp(struct evsel *evsel, void *handler) { - evsel->priv = malloc(sizeof(struct syscall_tp)); - if (evsel->priv != NULL) { + if (evsel__syscall_tp(evsel) != NULL) { if (perf_evsel__init_sc_tp_uint_field(evsel, id)) - goto out_delete; + return -ENOENT; evsel->handler = handler; return 0; } return -ENOMEM; - -out_delete: - zfree(&evsel->priv); - return -ENOENT; } -static struct perf_evsel *perf_evsel__raw_syscall_newtp(const char *direction, void *handler) +static struct evsel *perf_evsel__raw_syscall_newtp(const char *direction, void *handler) { - struct perf_evsel *evsel = perf_evsel__newtp("raw_syscalls", direction); + struct evsel *evsel = evsel__newtp("raw_syscalls", direction); /* older kernel (e.g., RHEL6) use syscalls:{enter,exit} */ if (IS_ERR(evsel)) - evsel = perf_evsel__newtp("syscalls", direction); + evsel = evsel__newtp("syscalls", direction); if (IS_ERR(evsel)) return NULL; - if (perf_evsel__init_raw_syscall_tp(evsel, handler)) + if (evsel__init_raw_syscall_tp(evsel, handler)) goto out_delete; return evsel; out_delete: - perf_evsel__delete_priv(evsel); + evsel__delete_priv(evsel); return NULL; } #define perf_evsel__sc_tp_uint(evsel, name, sample) \ - ({ struct syscall_tp *fields = evsel->priv; \ + ({ 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->priv; \ + ({ 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; @@ -397,6 +587,26 @@ static size_t syscall_arg__scnprintf_strarray(char *bf, size_t size, #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; @@ -419,6 +629,74 @@ size_t strarrays__scnprintf(struct strarrays *sas, char *bf, size_t size, const 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 + val = strtoul(tok, NULL, 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) { @@ -470,12 +748,39 @@ size_t syscall_arg__scnprintf_long(char *bf, size_t size, struct syscall_arg *ar 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", + "MAP_GET_NEXT_KEY", "PROG_LOAD", "OBJ_PIN", "OBJ_GET", "PROG_ATTACH", + "PROG_DETACH", "PROG_TEST_RUN", "PROG_GET_NEXT_ID", "MAP_GET_NEXT_ID", + "PROG_GET_FD_BY_ID", "MAP_GET_FD_BY_ID", "OBJ_GET_INFO_BY_FD", + "PROG_QUERY", "RAW_TRACEPOINT_OPEN", "BTF_LOAD", "BTF_GET_FD_BY_ID", + "TASK_FD_QUERY", "MAP_LOOKUP_AND_DELETE_ELEM", "MAP_FREEZE", + "BTF_GET_NEXT_ID", "MAP_LOOKUP_BATCH", "MAP_LOOKUP_AND_DELETE_BATCH", + "MAP_UPDATE_BATCH", "MAP_DELETE_BATCH", "LINK_CREATE", "LINK_UPDATE", + "LINK_GET_FD_BY_ID", "LINK_GET_NEXT_ID", "ENABLE_STATS", "ITER_CREATE", + "LINK_DETACH", "PROG_BIND_MAP", }; 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); @@ -510,7 +815,7 @@ static const char *fcntl_cmds[] = { static DEFINE_STRARRAY(fcntl_cmds, "F_"); static const char *fcntl_linux_specific_cmds[] = { - "SETLEASE", "GETLEASE", "NOTIFY", [5] = "CANCELLK", "DUPFD_CLOEXEC", + "SETLEASE", "GETLEASE", "NOTIFY", "DUPFD_QUERY", [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", }; @@ -575,6 +880,15 @@ static size_t syscall_arg__scnprintf_filename(char *bf, size_t size, #define SCA_FILENAME syscall_arg__scnprintf_filename +// 'argname' is just documentational at this point, to remove the previous comment with that info +#define SCA_FILENAME_FROM_USER(argname) \ + { .scnprintf = SCA_FILENAME, \ + .from_user = true, } + +static size_t syscall_arg__scnprintf_buf(char *bf, size_t size, struct syscall_arg *arg); + +#define SCA_BUF syscall_arg__scnprintf_buf + static size_t syscall_arg__scnprintf_pipe_flags(char *bf, size_t size, struct syscall_arg *arg) { @@ -632,11 +946,189 @@ static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size, #define SCA_GETRANDOM_FLAGS syscall_arg__scnprintf_getrandom_flags +#ifdef HAVE_LIBBPF_SUPPORT +static void syscall_arg_fmt__cache_btf_enum(struct syscall_arg_fmt *arg_fmt, struct btf *btf, char *type) +{ + int id; + + type = strstr(type, "enum "); + if (type == NULL) + return; + + type += 5; // skip "enum " to get the enumeration name + + id = btf__find_by_name(btf, type); + if (id < 0) + return; + + arg_fmt->type = btf__type_by_id(btf, id); +} + +static bool syscall_arg__strtoul_btf_enum(char *bf, size_t size, struct syscall_arg *arg, u64 *val) +{ + const struct btf_type *bt = arg->fmt->type; + struct btf *btf = arg->trace->btf; + struct btf_enum *be = btf_enum(bt); + + for (int i = 0; i < btf_vlen(bt); ++i, ++be) { + const char *name = btf__name_by_offset(btf, be->name_off); + int max_len = max(size, strlen(name)); + + if (strncmp(name, bf, max_len) == 0) { + *val = be->val; + return true; + } + } + + return false; +} + +static bool syscall_arg__strtoul_btf_type(char *bf, size_t size, struct syscall_arg *arg, u64 *val) +{ + const struct btf_type *bt; + char *type = arg->type_name; + struct btf *btf; + + trace__load_vmlinux_btf(arg->trace); + + btf = arg->trace->btf; + if (btf == NULL) + return false; + + if (arg->fmt->type == NULL) { + // See if this is an enum + syscall_arg_fmt__cache_btf_enum(arg->fmt, btf, type); + } + + // Now let's see if we have a BTF type resolved + bt = arg->fmt->type; + if (bt == NULL) + return false; + + // If it is an enum: + if (btf_is_enum(arg->fmt->type)) + return syscall_arg__strtoul_btf_enum(bf, size, arg, val); + + return false; +} + +static size_t btf_enum_scnprintf(const struct btf_type *type, struct btf *btf, char *bf, size_t size, int val) +{ + struct btf_enum *be = btf_enum(type); + const int nr_entries = btf_vlen(type); + + for (int i = 0; i < nr_entries; ++i, ++be) { + if (be->val == val) { + return scnprintf(bf, size, "%s", + btf__name_by_offset(btf, be->name_off)); + } + } + + return 0; +} + +struct trace_btf_dump_snprintf_ctx { + char *bf; + size_t printed, size; +}; + +static void trace__btf_dump_snprintf(void *vctx, const char *fmt, va_list args) +{ + struct trace_btf_dump_snprintf_ctx *ctx = vctx; + + ctx->printed += vscnprintf(ctx->bf + ctx->printed, ctx->size - ctx->printed, fmt, args); +} + +static size_t btf_struct_scnprintf(const struct btf_type *type, struct btf *btf, char *bf, size_t size, struct syscall_arg *arg) +{ + struct trace_btf_dump_snprintf_ctx ctx = { + .bf = bf, + .size = size, + }; + struct augmented_arg *augmented_arg = arg->augmented.args; + int type_id = arg->fmt->type_id, consumed; + struct btf_dump *btf_dump; + + LIBBPF_OPTS(btf_dump_opts, dump_opts); + LIBBPF_OPTS(btf_dump_type_data_opts, dump_data_opts); + + if (arg == NULL || arg->augmented.args == NULL) + return 0; + + dump_data_opts.compact = true; + dump_data_opts.skip_names = !arg->trace->show_arg_names; + + btf_dump = btf_dump__new(btf, trace__btf_dump_snprintf, &ctx, &dump_opts); + if (btf_dump == NULL) + return 0; + + /* pretty print the struct data here */ + if (btf_dump__dump_type_data(btf_dump, type_id, arg->augmented.args->value, type->size, &dump_data_opts) == 0) + return 0; + + consumed = sizeof(*augmented_arg) + augmented_arg->size; + arg->augmented.args = ((void *)arg->augmented.args) + consumed; + arg->augmented.size -= consumed; + + btf_dump__free(btf_dump); + + return ctx.printed; +} + +static size_t trace__btf_scnprintf(struct trace *trace, struct syscall_arg *arg, char *bf, + size_t size, int val, char *type) +{ + struct syscall_arg_fmt *arg_fmt = arg->fmt; + + if (trace->btf == NULL) + return 0; + + if (arg_fmt->type == NULL) { + // Check if this is an enum and if we have the BTF type for it. + syscall_arg_fmt__cache_btf_enum(arg_fmt, trace->btf, type); + } + + // Did we manage to find a BTF type for the syscall/tracepoint argument? + if (arg_fmt->type == NULL) + return 0; + + if (btf_is_enum(arg_fmt->type)) + return btf_enum_scnprintf(arg_fmt->type, trace->btf, bf, size, val); + else if (btf_is_struct(arg_fmt->type) || btf_is_union(arg_fmt->type)) + return btf_struct_scnprintf(arg_fmt->type, trace->btf, bf, size, arg); + + return 0; +} + +#else // HAVE_LIBBPF_SUPPORT +static size_t trace__btf_scnprintf(struct trace *trace __maybe_unused, struct syscall_arg *arg __maybe_unused, + char *bf __maybe_unused, size_t size __maybe_unused, int val __maybe_unused, + char *type __maybe_unused) +{ + return 0; +} + +static bool syscall_arg__strtoul_btf_type(char *bf __maybe_unused, size_t size __maybe_unused, + struct syscall_arg *arg __maybe_unused, u64 *val __maybe_unused) +{ + return false; +} +#endif // HAVE_LIBBPF_SUPPORT + +#define STUL_BTF_TYPE syscall_arg__strtoul_btf_type + #define STRARRAY(name, array) \ { .scnprintf = SCA_STRARRAY, \ - .parm = &strarray__##array, } + .strtoul = STUL_STRARRAY, \ + .parm = &strarray__##array, \ + .show_zero = true, } + +#define STRARRAY_FLAGS(name, array) \ + { .scnprintf = SCA_STRARRAY_FLAGS, \ + .strtoul = STUL_STRARRAY_FLAGS, \ + .parm = &strarray__##array, \ + .show_zero = true, } -#include "trace/beauty/arch_errno_names.c" #include "trace/beauty/eventfd.c" #include "trace/beauty/futex_op.c" #include "trace/beauty/futex_val3.c" @@ -652,36 +1144,25 @@ static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size, #include "trace/beauty/socket_type.c" #include "trace/beauty/waitid_options.c" -struct syscall_arg_fmt { - size_t (*scnprintf)(char *bf, size_t size, struct syscall_arg *arg); - unsigned long (*mask_val)(struct syscall_arg *arg, unsigned long val); - void *parm; - const char *name; - bool show_zero; -}; - -static struct syscall_fmt { - const char *name; - const char *alias; - struct syscall_arg_fmt arg[6]; - u8 nr_args; - bool errpid; - bool timeout; - bool hexret; -} syscall_fmts[] = { +static const 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 = { [1] = { .scnprintf = SCA_SOCKADDR, /* umyaddr */ }, }, }, + .arg = { [0] = { .scnprintf = SCA_INT, /* fd */ }, + [1] = SCA_SOCKADDR_FROM_USER(umyaddr), + [2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, }, { .name = "bpf", - .arg = { [0] = STRARRAY(cmd, bpf_cmd), }, }, + .arg = { [0] = STRARRAY(cmd, bpf_cmd), + [1] = { .from_user = true /* attr */, }, } }, { .name = "brk", .hexret = true, .arg = { [0] = { .scnprintf = SCA_PTR, /* brk */ }, }, }, { .name = "clock_gettime", .arg = { [0] = STRARRAY(clk_id, clockid), }, }, + { .name = "clock_nanosleep", + .arg = { [2] = SCA_TIMESPEC_FROM_USER(req), }, }, { .name = "clone", .errpid = true, .nr_args = 5, .arg = { [0] = { .name = "flags", .scnprintf = SCA_CLONE_FLAGS, }, [1] = { .name = "child_stack", .scnprintf = SCA_HEX, }, @@ -691,24 +1172,44 @@ static struct syscall_fmt { { .name = "close", .arg = { [0] = { .scnprintf = SCA_CLOSE_FD, /* fd */ }, }, }, { .name = "connect", - .arg = { [1] = { .scnprintf = SCA_SOCKADDR, /* servaddr */ }, }, }, + .arg = { [0] = { .scnprintf = SCA_INT, /* fd */ }, + [1] = SCA_SOCKADDR_FROM_USER(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 = "faccessat", + .arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ }, + [1] = SCA_FILENAME_FROM_USER(pathname), + [2] = { .scnprintf = SCA_ACCMODE, /* mode */ }, }, }, + { .name = "faccessat2", + .arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ }, + [1] = SCA_FILENAME_FROM_USER(pathname), + [2] = { .scnprintf = SCA_ACCMODE, /* mode */ }, + [3] = { .scnprintf = SCA_FACCESSAT2_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 */ + .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] = SCA_FILENAME_FROM_USER(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 */ }, }, }, @@ -723,6 +1224,8 @@ static struct syscall_fmt { .arg = { [2] = { .scnprintf = SCA_GETRANDOM_FLAGS, /* flags */ }, }, }, { .name = "getrlimit", .arg = { [0] = STRARRAY(resource, rlimit_resources), }, }, + { .name = "getsockopt", + .arg = { [1] = STRARRAY(level, socket_level), }, }, { .name = "gettid", .errpid = true, }, { .name = "ioctl", .arg = { @@ -762,24 +1265,36 @@ static struct syscall_fmt { #if defined(__s390x__) .alias = "old_mmap", #endif - .arg = { [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, - [3] = { .scnprintf = SCA_MMAP_FLAGS, /* flags */ }, + .arg = { [2] = { .scnprintf = SCA_MMAP_PROT, .show_zero = true, /* 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 */ }, + .arg = { [0] = SCA_FILENAME_FROM_USER(devname), [3] = { .scnprintf = SCA_MOUNT_FLAGS, /* flags */ .mask_val = SCAMV_MOUNT_FLAGS, /* flags */ }, }, }, + { .name = "move_mount", + .arg = { [0] = { .scnprintf = SCA_FDAT, /* from_dfd */ }, + [1] = SCA_FILENAME_FROM_USER(pathname), + [2] = { .scnprintf = SCA_FDAT, /* to_dfd */ }, + [3] = SCA_FILENAME_FROM_USER(pathname), + [4] = { .scnprintf = SCA_MOVE_MOUNT_FLAGS, /* flags */ }, }, }, { .name = "mprotect", .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, - [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, }, }, + [2] = { .scnprintf = SCA_MMAP_PROT, .show_zero = true, /* prot */ }, }, }, { .name = "mq_unlink", - .arg = { [0] = { .scnprintf = SCA_FILENAME, /* u_name */ }, }, }, + .arg = { [0] = SCA_FILENAME_FROM_USER(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 = "nanosleep", + .arg = { [0] = SCA_TIMESPEC_FROM_USER(req), }, }, + { .name = "newfstatat", .alias = "fstatat", + .arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ }, + [1] = SCA_FILENAME_FROM_USER(pathname), + [3] = { .scnprintf = SCA_FS_AT_FLAGS, /* flags */ }, }, }, { .name = "open", .arg = { [1] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, { .name = "open_by_handle_at", @@ -789,7 +1304,8 @@ static struct syscall_fmt { .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, { .name = "perf_event_open", - .arg = { [2] = { .scnprintf = SCA_INT, /* cpu */ }, + .arg = { [0] = SCA_PERF_ATTR_FROM_USER(attr), + [2] = { .scnprintf = SCA_INT, /* cpu */ }, [3] = { .scnprintf = SCA_FD, /* group_fd */ }, [4] = { .scnprintf = SCA_PERF_FLAGS, /* flags */ }, }, }, { .name = "pipe2", @@ -800,18 +1316,21 @@ static struct syscall_fmt { .arg = { [0] = { .scnprintf = SCA_INT, /* key */ }, }, }, { .name = "pkey_mprotect", .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, - [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, + [2] = { .scnprintf = SCA_MMAP_PROT, .show_zero = true, /* prot */ }, [3] = { .scnprintf = SCA_INT, /* pkey */ }, }, }, { .name = "poll", .timeout = true, }, { .name = "ppoll", .timeout = true, }, { .name = "prctl", - .arg = { [0] = { .scnprintf = SCA_PRCTL_OPTION, /* option */ }, + .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), }, }, + .arg = { [1] = STRARRAY(resource, rlimit_resources), + [2] = { .from_user = true /* new_rlim */, }, }, }, { .name = "pwrite", .alias = "pwrite64", }, { .name = "readlinkat", .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, @@ -828,6 +1347,8 @@ static struct syscall_fmt { .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ }, [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, [4] = { .scnprintf = SCA_RENAMEAT2_FLAGS, /* flags */ }, }, }, + { .name = "rseq", + .arg = { [0] = { .from_user = true /* rseq */, }, }, }, { .name = "rt_sigaction", .arg = { [0] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, { .name = "rt_sigprocmask", @@ -842,18 +1363,24 @@ static struct syscall_fmt { .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 */ }, }, }, + [4] = SCA_SOCKADDR_FROM_USER(addr), }, }, + { .name = "set_robust_list", + .arg = { [0] = { .from_user = true /* head */, }, }, }, { .name = "set_tid_address", .errpid = true, }, { .name = "setitimer", .arg = { [0] = STRARRAY(which, itimers), }, }, { .name = "setrlimit", - .arg = { [0] = STRARRAY(resource, rlimit_resources), }, }, + .arg = { [0] = STRARRAY(resource, rlimit_resources), + [1] = { .from_user = true /* rlim */, }, }, }, + { .name = "setsockopt", + .arg = { [1] = STRARRAY(level, socket_level), }, }, { .name = "socket", .arg = { [0] = STRARRAY(family, socket_families), [1] = { .scnprintf = SCA_SK_TYPE, /* type */ }, @@ -865,29 +1392,35 @@ static struct syscall_fmt { { .name = "stat", .alias = "newstat", }, { .name = "statx", .arg = { [0] = { .scnprintf = SCA_FDAT, /* fdat */ }, - [2] = { .scnprintf = SCA_STATX_FLAGS, /* flags */ } , + [2] = { .scnprintf = SCA_FS_AT_FLAGS, /* flags */ } , [3] = { .scnprintf = SCA_STATX_MASK, /* mask */ }, }, }, { .name = "swapoff", - .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, }, + .arg = { [0] = SCA_FILENAME_FROM_USER(specialfile), }, }, { .name = "swapon", - .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, }, + .arg = { [0] = SCA_FILENAME_FROM_USER(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 */ }, }, }, + .arg = { [0] = SCA_FILENAME_FROM_USER(name), }, }, { .name = "uname", .alias = "newuname", }, { .name = "unlinkat", - .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, + .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, + [1] = SCA_FILENAME_FROM_USER(pathname), + [2] = { .scnprintf = SCA_FS_AT_FLAGS, /* flags */ }, }, }, { .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 */ }, }, }, + { .name = "write", + .arg = { [1] = { .scnprintf = SCA_BUF /* buf */, .from_user = true, }, }, }, }; static int syscall_fmt__cmp(const void *name, const void *fmtp) @@ -896,45 +1429,77 @@ static int syscall_fmt__cmp(const void *name, const void *fmtp) return strcmp(name, fmt->name); } -static struct syscall_fmt *syscall_fmt__find(const char *name) +static const struct syscall_fmt *__syscall_fmt__find(const struct syscall_fmt *fmts, + const int nmemb, + const char *name) +{ + return bsearch(name, fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp); +} + +static const struct syscall_fmt *syscall_fmt__find(const char *name) { const int nmemb = ARRAY_SIZE(syscall_fmts); - return bsearch(name, syscall_fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp); + return __syscall_fmt__find(syscall_fmts, nmemb, name); } -static struct syscall_fmt *syscall_fmt__find_by_alias(const char *alias) +static const struct syscall_fmt *__syscall_fmt__find_by_alias(const struct syscall_fmt *fmts, + const int nmemb, const char *alias) { - int i, nmemb = ARRAY_SIZE(syscall_fmts); + int i; for (i = 0; i < nmemb; ++i) { - if (syscall_fmts[i].alias && strcmp(syscall_fmts[i].alias, alias) == 0) - return &syscall_fmts[i]; + if (fmts[i].alias && strcmp(fmts[i].alias, alias) == 0) + return &fmts[i]; } return NULL; } -/* - * 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. +static const 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); +} + +/** + * struct syscall */ struct syscall { + /** @e_machine: The ELF machine associated with the entry. */ + int e_machine; + /** @id: id value from the tracepoint, the system call number. */ + int id; struct tep_event *tp_format; int nr_args; + /** + * @args_size: sum of the sizes of the syscall arguments, anything + * after that is augmented stuff: pathname for openat, etc. + */ + int args_size; + struct { + struct bpf_program *sys_enter, + *sys_exit; + } bpf_prog; + /** @is_exit: is this "exit" or "exit_group"? */ bool is_exit; + /** + * @is_open: is this "open" or "openat"? To associate the fd returned in + * sys_exit with the pathname in sys_enter. + */ bool is_open; + /** + * @nonexistent: Name lookup failed. Just a hole in the syscall table, + * syscall id not allocated. + */ + bool nonexistent; + bool use_btf; struct tep_format_field *args; const char *name; - struct syscall_fmt *fmt; + const struct syscall_fmt *fmt; struct syscall_arg_fmt *arg_fmt; }; -struct bpf_map_syscall_entry { - bool enabled; -}; - /* * 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 @@ -985,22 +1550,70 @@ struct thread_trace { struct file *table; } files; - struct intlist *syscall_stats; + struct hashmap *syscall_stats; }; -static struct thread_trace *thread_trace__new(void) +static size_t syscall_id_hash(long key, void *ctx __maybe_unused) +{ + return key; +} + +static bool syscall_id_equal(long key1, long key2, void *ctx __maybe_unused) +{ + return key1 == key2; +} + +static struct hashmap *alloc_syscall_stats(void) +{ + return hashmap__new(syscall_id_hash, syscall_id_equal, NULL); +} + +static void delete_syscall_stats(struct hashmap *syscall_stats) +{ + struct hashmap_entry *pos; + size_t bkt; + + if (syscall_stats == NULL) + return; + + hashmap__for_each_entry(syscall_stats, pos, bkt) + zfree(&pos->pvalue); + hashmap__free(syscall_stats); +} + +static struct thread_trace *thread_trace__new(struct trace *trace) { struct thread_trace *ttrace = zalloc(sizeof(struct thread_trace)); - if (ttrace) + if (ttrace) { ttrace->files.max = -1; - - ttrace->syscall_stats = intlist__new(NULL); + if (trace->summary) { + ttrace->syscall_stats = alloc_syscall_stats(); + if (IS_ERR(ttrace->syscall_stats)) + zfree(&ttrace); + } + } return ttrace; } -static struct thread_trace *thread__trace(struct thread *thread, FILE *fp) +static void thread_trace__free_files(struct thread_trace *ttrace); + +static void thread_trace__delete(void *pttrace) +{ + struct thread_trace *ttrace = pttrace; + + if (!ttrace) + return; + + delete_syscall_stats(ttrace->syscall_stats); + ttrace->syscall_stats = NULL; + thread_trace__free_files(ttrace); + zfree(&ttrace->entry_str); + free(ttrace); +} + +static struct thread_trace *thread__trace(struct thread *thread, struct trace *trace) { struct thread_trace *ttrace; @@ -1008,7 +1621,7 @@ static struct thread_trace *thread__trace(struct thread *thread, FILE *fp) goto fail; if (thread__priv(thread) == NULL) - thread__set_priv(thread, thread_trace__new()); + thread__set_priv(thread, thread_trace__new(trace)); if (thread__priv(thread) == NULL) goto fail; @@ -1018,7 +1631,7 @@ static struct thread_trace *thread__trace(struct thread *thread, FILE *fp) return ttrace; fail: - color_fprintf(fp, PERF_COLOR_RED, + color_fprintf(trace->output, PERF_COLOR_RED, "WARNING: not enough memory, dropping samples!\n"); return NULL; } @@ -1037,8 +1650,22 @@ void syscall_arg__set_ret_scnprintf(struct syscall_arg *arg, static const size_t trace__entry_str_size = 2048; +static void thread_trace__free_files(struct thread_trace *ttrace) +{ + for (int i = 0; i <= ttrace->files.max; ++i) { + struct file *file = ttrace->files.table + i; + zfree(&file->pathname); + } + + zfree(&ttrace->files.table); + ttrace->files.max = -1; +} + 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)); @@ -1071,6 +1698,7 @@ static int trace__set_fd_pathname(struct thread *thread, int fd, const char *pat if (file != NULL) { struct stat st; + if (stat(pathname, &st) == 0) file->dev_maj = major(st.st_rdev); file->pathname = strdup(pathname); @@ -1087,12 +1715,13 @@ static int thread__read_fd_path(struct thread *thread, int fd) struct stat st; int ret; - if (thread->pid_ == thread->tid) { + if (thread__pid(thread) == thread__tid(thread)) { scnprintf(linkname, sizeof(linkname), - "/proc/%d/fd/%d", thread->pid_, fd); + "/proc/%d/fd/%d", thread__pid(thread), fd); } else { scnprintf(linkname, sizeof(linkname), - "/proc/%d/task/%d/fd/%d", thread->pid_, thread->tid, fd); + "/proc/%d/task/%d/fd/%d", + thread__pid(thread), thread__tid(thread), fd); } if (lstat(linkname, &st) < 0 || st.st_size + 1 > (off_t)sizeof(pathname)) @@ -1112,7 +1741,7 @@ static const char *thread__fd_path(struct thread *thread, int fd, { struct thread_trace *ttrace = thread__priv(thread); - if (ttrace == NULL) + if (ttrace == NULL || trace->fd_path_disabled) return NULL; if (fd < 0) @@ -1183,8 +1812,17 @@ static void thread__set_filename_pos(struct thread *thread, const char *bf, 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 scnprintf(bf, size, "\"%.*s\"", augmented_arg->size, augmented_arg->value); + return printed; } static size_t syscall_arg__scnprintf_filename(char *bf, size_t size, @@ -1202,6 +1840,32 @@ static size_t syscall_arg__scnprintf_filename(char *bf, size_t size, return 0; } +#define MAX_CONTROL_CHAR 31 +#define MAX_ASCII 127 + +static size_t syscall_arg__scnprintf_buf(char *bf, size_t size, struct syscall_arg *arg) +{ + struct augmented_arg *augmented_arg = arg->augmented.args; + unsigned char *orig = (unsigned char *)augmented_arg->value; + size_t printed = 0; + int consumed; + + if (augmented_arg == NULL) + return 0; + + for (int j = 0; j < augmented_arg->size; ++j) { + bool control_char = orig[j] <= MAX_CONTROL_CHAR || orig[j] >= MAX_ASCII; + /* print control characters (0~31 and 127), and non-ascii characters in \(digits) */ + printed += scnprintf(bf + printed, size - printed, control_char ? "\\%d" : "%c", (int)orig[j]); + } + + consumed = sizeof(*augmented_arg) + augmented_arg->size; + arg->augmented.args = ((void *)arg->augmented.args) + consumed; + arg->augmented.size -= consumed; + + return printed; +} + static bool trace__filter_duration(struct trace *trace, double t) { return t < (trace->duration_filter * NSEC_PER_MSEC); @@ -1228,13 +1892,20 @@ static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp) return fprintf(fp, " ? "); } -static bool done = false; -static bool interrupted = false; +static pid_t workload_pid = -1; +static volatile sig_atomic_t done = false; +static volatile sig_atomic_t interrupted = false; + +static void sighandler_interrupt(int sig __maybe_unused) +{ + done = interrupted = true; +} -static void sig_handler(int sig) +static void sighandler_chld(int sig __maybe_unused, siginfo_t *info, + void *context __maybe_unused) { - done = true; - interrupted = sig == SIGINT; + if (info->si_pid == workload_pid) + done = true; } static size_t trace__fprintf_comm_tid(struct trace *trace, struct thread *thread, FILE *fp) @@ -1244,7 +1915,7 @@ static size_t trace__fprintf_comm_tid(struct trace *trace, struct thread *thread if (trace->multiple_threads) { if (trace->show_comm) printed += fprintf(fp, "%.14s/", thread__comm_str(thread)); - printed += fprintf(fp, "%d ", thread->tid); + printed += fprintf(fp, "%d ", thread__tid(thread)); } return printed; @@ -1270,7 +1941,7 @@ static int trace__process_event(struct trace *trace, struct machine *machine, switch (event->header.type) { case PERF_RECORD_LOST: color_fprintf(trace->output, PERF_COLOR_RED, - "LOST %" PRIu64 " events!\n", event->lost.lost); + "LOST %" PRIu64 " events!\n", (u64)event->lost.lost); ret = machine__process_lost_event(machine, event, sample); break; default: @@ -1281,7 +1952,7 @@ static int trace__process_event(struct trace *trace, struct machine *machine, return ret; } -static int trace__tool_process(struct perf_tool *tool, +static int trace__tool_process(const struct perf_tool *tool, union perf_event *event, struct perf_sample *sample, struct machine *machine) @@ -1299,7 +1970,7 @@ static char *trace__machine__resolve_kernel_addr(void *vmachine, unsigned long l if (symbol_conf.kptr_restrict) { pr_warning("Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n" - "Check /proc/sys/kernel/kptr_restrict.\n\n" + "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; @@ -1308,28 +1979,40 @@ static char *trace__machine__resolve_kernel_addr(void *vmachine, unsigned long l return machine__resolve_kernel_addr(vmachine, addrp, modp); } -static int trace__symbols_init(struct trace *trace, struct perf_evlist *evlist) +static int trace__symbols_init(struct trace *trace, int argc, const char **argv, + struct evlist *evlist) { int err = symbol__init(NULL); if (err) return err; - trace->host = machine__new_host(); - if (trace->host == NULL) - return -ENOMEM; + perf_env__init(&trace->host_env); + err = perf_env__set_cmdline(&trace->host_env, argc, argv); + if (err) + goto out; + + trace->host = machine__new_host(&trace->host_env); + if (trace->host == NULL) { + err = -ENOMEM; + goto out; + } + thread__set_priv_destructor(thread_trace__delete); err = trace_event__register_resolver(trace->host, trace__machine__resolve_kernel_addr); if (err < 0) goto out; err = __machine__synthesize_threads(trace->host, &trace->tool, &trace->opts.target, - evlist->threads, trace__tool_process, false, - 1); + evlist->core.threads, trace__tool_process, + /*needs_mmap=*/callchain_param.enabled, + /*mmap_data=*/false, + /*nr_threads_synthesize=*/1); out: - if (err) + if (err) { + perf_env__exit(&trace->host_env); symbol__exit(); - + } return err; } @@ -1338,6 +2021,7 @@ static void trace__symbols__exit(struct trace *trace) machine__exit(trace->host); trace->host = NULL; + perf_env__exit(&trace->host_env); symbol__exit(); } @@ -1345,7 +2029,7 @@ static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args) { int idx; - if (nr_args == 6 && sc->fmt && sc->fmt->nr_args != 0) + 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)); @@ -1361,79 +2045,137 @@ static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args) return 0; } -static int syscall__set_arg_fmts(struct syscall *sc) +static const 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 const struct syscall_arg_fmt * +__syscall_arg_fmt__find_by_name(const struct syscall_arg_fmt *fmts, const int nmemb, + const char *name) { - struct tep_format_field *field, *last_field = NULL; - int idx = 0, len; + return bsearch(name, fmts, nmemb, sizeof(struct syscall_arg_fmt), syscall_arg_fmt__cmp); +} + +static const 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); +} + +/* + * v6.19 kernel added new fields to read userspace memory for event tracing. + * But it's not used by perf and confuses the syscall parameters. + */ +static bool is_internal_field(struct tep_format_field *field) +{ + return !strcmp(field->type, "__data_loc char[]"); +} + +static struct tep_format_field * +syscall_arg_fmt__init_array(struct syscall_arg_fmt *arg, struct tep_format_field *field, + bool *use_btf) +{ + struct tep_format_field *last_field = NULL; + int len; + + for (; field; field = field->next, ++arg) { + /* assume it's the last argument */ + if (is_internal_field(field)) + continue; - for (field = sc->args; field; field = field->next, ++idx) { last_field = field; - if (sc->fmt && sc->fmt->arg[idx].scnprintf) + if (arg->scnprintf) continue; + len = strlen(field->name); + + // As far as heuristics (or intention) goes this seems to hold true, and makes sense! + if ((field->flags & TEP_FIELD_IS_POINTER) && strstarts(field->type, "const ")) + arg->from_user = true; + if (strcmp(field->type, "const char *") == 0 && - (strcmp(field->name, "filename") == 0 || - strcmp(field->name, "path") == 0 || - strcmp(field->name, "pathname") == 0)) - sc->arg_fmt[idx].scnprintf = SCA_FILENAME; - else if ((field->flags & TEP_FIELD_IS_POINTER) || strstr(field->name, "addr")) - sc->arg_fmt[idx].scnprintf = SCA_PTR; + ((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) - sc->arg_fmt[idx].scnprintf = SCA_PID; + arg->scnprintf = SCA_PID; else if (strcmp(field->type, "umode_t") == 0) - sc->arg_fmt[idx].scnprintf = SCA_MODE_T; - else if ((strcmp(field->type, "int") == 0 || + 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 = strlen(field->name)) >= 2 && - strcmp(field->name + len - 2, "fd") == 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 + * grep -E 'field:.*fd;' .../format|sed -r 's/.*field:([a-z ]+) [a-z_]*fd.+/\1/g'|sort|uniq -c * 65 int * 23 unsigned int * 7 unsigned long */ - sc->arg_fmt[idx].scnprintf = SCA_FD; + arg->scnprintf = SCA_FD; + } else if (strstr(field->type, "enum") && use_btf != NULL) { + *use_btf = true; + arg->strtoul = STUL_BTF_TYPE; + } else { + const 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, + &sc->use_btf); + 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) +static int syscall__read_info(struct syscall *sc, struct trace *trace) { char tp_name[128]; - struct syscall *sc; - const char *name = syscalltbl__name(trace->sctbl, id); - - if (name == NULL) - return -1; - - if (id > trace->syscalls.max) { - struct syscall *nsyscalls = realloc(trace->syscalls.table, (id + 1) * sizeof(*sc)); + const char *name; + struct tep_format_field *field; + int err; - if (nsyscalls == NULL) - return -1; + if (sc->nonexistent) + return -EEXIST; - if (trace->syscalls.max != -1) { - memset(nsyscalls + trace->syscalls.max + 1, 0, - (id - trace->syscalls.max) * sizeof(*sc)); - } else { - memset(nsyscalls, 0, (id + 1) * sizeof(*sc)); - } + if (sc->name) { + /* Info already read. */ + return 0; + } - trace->syscalls.table = nsyscalls; - trace->syscalls.max = id; + name = syscalltbl__name(sc->e_machine, sc->id); + if (name == NULL) { + sc->nonexistent = true; + return -EEXIST; } - sc = trace->syscalls.table + id; sc->name = name; - sc->fmt = syscall_fmt__find(sc->name); snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name); @@ -1444,11 +2186,23 @@ static int trace__read_syscall_info(struct trace *trace, int id) sc->tp_format = trace_event__tp_format("syscalls", tp_name); } - if (syscall__alloc_arg_fmts(sc, IS_ERR(sc->tp_format) ? 6 : sc->tp_format->format.nr_fields)) - return -1; + /* + * 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; + err = PTR_ERR(sc->tp_format); + sc->tp_format = NULL; + return err; + } - if (IS_ERR(sc->tp_format)) - return -1; + /* + * The tracepoint format contains __syscall_nr field, so it's one more + * than the actual number of syscall arguments. + */ + if (syscall__alloc_arg_fmts(sc, sc->tp_format->format.nr_fields - 1)) + return -ENOMEM; sc->args = sc->tp_format->format.fields; /* @@ -1461,20 +2215,56 @@ static int trace__read_syscall_info(struct trace *trace, int id) --sc->nr_args; } + field = sc->args; + while (field) { + if (is_internal_field(field)) + --sc->nr_args; + field = field->next; + } + 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); + err = syscall__set_arg_fmts(sc); + + /* after calling syscall__set_arg_fmts() we'll know whether use_btf is true */ + if (sc->use_btf) + trace__load_vmlinux_btf(trace); + + return err; +} + +static int evsel__init_tp_arg_scnprintf(struct evsel *evsel, bool *use_btf) +{ + struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel); + + if (fmt != NULL) { + const struct tep_event *tp_format = evsel__tp_format(evsel); + + if (tp_format) { + syscall_arg_fmt__init_array(fmt, tp_format->format.fields, use_btf); + 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, i; - size_t nr_allocated; + 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.nr = strlist__nr_entries(trace->ev_qualifier); - trace->ev_qualifier_ids.entries = malloc(trace->ev_qualifier_ids.nr * + trace->ev_qualifier_ids.entries = malloc(nr_allocated * sizeof(trace->ev_qualifier_ids.entries[0])); if (trace->ev_qualifier_ids.entries == NULL) { @@ -1484,37 +2274,39 @@ static int trace__validate_ev_qualifier(struct trace *trace) goto out; } - nr_allocated = trace->ev_qualifier_ids.nr; - i = 0; - strlist__for_each_entry(pos, trace->ev_qualifier) { const char *sc = pos->s; - int id = syscalltbl__id(trace->sctbl, sc), match_next = -1; + /* + * TODO: Assume more than the validation/warnings are all for + * the same binary type as perf. + */ + int id = syscalltbl__id(EM_HOST, sc), match_next = -1; if (id < 0) { - id = syscalltbl__strglobmatch_first(trace->sctbl, sc, &match_next); + id = syscalltbl__strglobmatch_first(EM_HOST, sc, &match_next); if (id >= 0) goto matches; - if (err == 0) { - fputs("Error:\tInvalid syscall ", trace->output); - err = -EINVAL; + if (!printed_invalid_prefix) { + pr_debug("Skipping unknown syscalls: "); + printed_invalid_prefix = true; } else { - fputs(", ", trace->output); + pr_debug(", "); } - fputs(sc, trace->output); + pr_debug("%s", sc); + continue; } matches: - trace->ev_qualifier_ids.entries[i++] = id; + trace->ev_qualifier_ids.entries[nr_used++] = id; if (match_next == -1) continue; while (1) { - id = syscalltbl__strglobmatch_next(trace->sctbl, sc, &match_next); + id = syscalltbl__strglobmatch_next(EM_HOST, sc, &match_next); if (id < 0) break; - if (nr_allocated == trace->ev_qualifier_ids.nr) { + if (nr_allocated == nr_used) { void *entries; nr_allocated += 8; @@ -1527,20 +2319,36 @@ matches: } trace->ev_qualifier_ids.entries = entries; } - trace->ev_qualifier_ids.nr++; - trace->ev_qualifier_ids.entries[i++] = id; + trace->ev_qualifier_ids.entries[nr_used++] = id; } } - if (err < 0) { - fputs("\nHint:\ttry 'perf list syscalls:sys_enter_*'" - "\nHint:\tand: 'man syscalls'\n", trace->output); -out_free: - zfree(&trace->ev_qualifier_ids.entries); - trace->ev_qualifier_ids.nr = 0; - } + 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; } /* @@ -1574,22 +2382,22 @@ static size_t syscall__scnprintf_name(struct syscall *sc, char *bf, size_t size, * as mount 'flags' argument that needs ignoring some magic flag, see comment * in tools/perf/trace/beauty/mount_flags.c */ -static unsigned long syscall__mask_val(struct syscall *sc, struct syscall_arg *arg, unsigned long val) +static unsigned long syscall_arg_fmt__mask_val(struct syscall_arg_fmt *fmt, struct syscall_arg *arg, unsigned long val) { - if (sc->arg_fmt && sc->arg_fmt[arg->idx].mask_val) - return sc->arg_fmt[arg->idx].mask_val(arg, val); + if (fmt && fmt->mask_val) + return fmt->mask_val(arg, val); return val; } -static size_t syscall__scnprintf_val(struct syscall *sc, char *bf, size_t size, - struct syscall_arg *arg, unsigned long 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 (sc->arg_fmt && sc->arg_fmt[arg->idx].scnprintf) { + if (fmt && fmt->scnprintf) { arg->val = val; - if (sc->arg_fmt[arg->idx].parm) - arg->parm = sc->arg_fmt[arg->idx].parm; - return sc->arg_fmt[arg->idx].scnprintf(bf, size, arg); + if (fmt->parm) + arg->parm = fmt->parm; + return fmt->scnprintf(bf, size, arg); } return scnprintf(bf, size, "%ld", val); } @@ -1598,7 +2406,7 @@ 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; + size_t printed = 0, btf_printed; unsigned long val; u8 bit = 1; struct syscall_arg arg = { @@ -1614,6 +2422,7 @@ static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size, .show_string_prefix = trace->show_string_prefix, }; struct thread_trace *ttrace = thread__priv(thread); + void *default_scnprintf; /* * Things like fcntl will set this in its 'cmd' formatter to pick the @@ -1630,25 +2439,24 @@ static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size, 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__mask_val(sc, &arg, val); + 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)) + * Suppress this argument if its value is zero and show_zero + * property isn't set. + * + * If it has a BTF type, then override the zero suppression knob + * as the common case is for zero in an enum to have an associated entry. + */ + if (val == 0 && !trace->show_zeros && + !(sc->arg_fmt && sc->arg_fmt[arg.idx].show_zero) && + !(sc->arg_fmt && sc->arg_fmt[arg.idx].strtoul == STUL_BTF_TYPE)) continue; printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : ""); @@ -1656,7 +2464,19 @@ static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size, if (trace->show_arg_names) printed += scnprintf(bf + printed, size - printed, "%s: ", field->name); - printed += syscall__scnprintf_val(sc, bf + printed, size - printed, &arg, val); + default_scnprintf = sc->arg_fmt[arg.idx].scnprintf; + + if (trace->force_btf || default_scnprintf == NULL || default_scnprintf == SCA_PTR) { + btf_printed = trace__btf_scnprintf(trace, &arg, bf + printed, + size - printed, val, field->type); + if (btf_printed) { + printed += btf_printed; + continue; + } + } + + printed += syscall_arg_fmt__scnprintf_val(&sc->arg_fmt[arg.idx], + bf + printed, size - printed, &arg, val); } } else if (IS_ERR(sc->tp_format)) { /* @@ -1671,7 +2491,7 @@ static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size, if (printed) printed += scnprintf(bf + printed, size - printed, ", "); printed += syscall__scnprintf_name(sc, bf + printed, size - printed, &arg); - printed += syscall__scnprintf_val(sc, bf + printed, size - printed, &arg, val); + printed += syscall_arg_fmt__scnprintf_val(&sc->arg_fmt[arg.idx], bf + printed, size - printed, &arg, val); next_arg: ++arg.idx; bit <<= 1; @@ -1681,13 +2501,93 @@ next_arg: return printed; } -typedef int (*tracepoint_handler)(struct trace *trace, struct perf_evsel *evsel, +static struct syscall *syscall__new(int e_machine, int id) +{ + struct syscall *sc = zalloc(sizeof(*sc)); + + if (!sc) + return NULL; + + sc->e_machine = e_machine; + sc->id = id; + return sc; +} + +static void syscall__delete(struct syscall *sc) +{ + if (!sc) + return; + + free(sc->arg_fmt); + free(sc); +} + +static int syscall__bsearch_cmp(const void *key, const void *entry) +{ + const struct syscall *a = key, *b = *((const struct syscall **)entry); + + if (a->e_machine != b->e_machine) + return a->e_machine - b->e_machine; + + return a->id - b->id; +} + +static int syscall__cmp(const void *va, const void *vb) +{ + const struct syscall *a = *((const struct syscall **)va); + const struct syscall *b = *((const struct syscall **)vb); + + if (a->e_machine != b->e_machine) + return a->e_machine - b->e_machine; + + return a->id - b->id; +} + +static struct syscall *trace__find_syscall(struct trace *trace, int e_machine, int id) +{ + struct syscall key = { + .e_machine = e_machine, + .id = id, + }; + struct syscall *sc, **tmp; + + if (trace->syscalls.table) { + struct syscall **sc_entry = bsearch(&key, trace->syscalls.table, + trace->syscalls.table_size, + sizeof(trace->syscalls.table[0]), + syscall__bsearch_cmp); + + if (sc_entry) + return *sc_entry; + } + + sc = syscall__new(e_machine, id); + if (!sc) + return NULL; + + tmp = reallocarray(trace->syscalls.table, trace->syscalls.table_size + 1, + sizeof(trace->syscalls.table[0])); + if (!tmp) { + syscall__delete(sc); + return NULL; + } + + trace->syscalls.table = tmp; + trace->syscalls.table[trace->syscalls.table_size++] = sc; + qsort(trace->syscalls.table, trace->syscalls.table_size, sizeof(trace->syscalls.table[0]), + syscall__cmp); + return sc; +} + +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 perf_evsel *evsel, int id) +static struct syscall *trace__syscall_info(struct trace *trace, struct evsel *evsel, + int e_machine, int id) { + struct syscall *sc; + int err = 0; if (id < 0) { @@ -1704,54 +2604,92 @@ static struct syscall *trace__syscall_info(struct trace *trace, if (verbose > 1) { static u64 n; fprintf(trace->output, "Invalid syscall %d id, skipping (%s, %" PRIu64 ") ...\n", - id, perf_evsel__name(evsel), ++n); + id, evsel__name(evsel), ++n); } return NULL; } - if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL) && - trace__read_syscall_info(trace, id)) - goto out_cant_read; + err = -EINVAL; - if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL)) - goto out_cant_read; + sc = trace__find_syscall(trace, e_machine, id); + if (sc) + err = syscall__read_info(sc, trace); - return &trace->syscalls.table[id]; + if (err && verbose > 0) { + char sbuf[STRERR_BUFSIZE]; -out_cant_read: - if (verbose > 0) { - fprintf(trace->output, "Problems reading syscall %d", id); - if (id <= trace->syscalls.max && trace->syscalls.table[id].name != NULL) - fprintf(trace->output, "(%s)", trace->syscalls.table[id].name); + fprintf(trace->output, "Problems reading syscall %d: %d (%s)", id, -err, + str_error_r(-err, sbuf, sizeof(sbuf))); + if (sc && sc->name) + fprintf(trace->output, "(%s)", sc->name); fputs(" information\n", trace->output); } - return NULL; + return err ? NULL : sc; } -static void thread__update_stats(struct thread_trace *ttrace, - int id, struct perf_sample *sample) +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, + struct trace *trace) { - struct int_node *inode; - struct stats *stats; + struct hashmap *syscall_stats = ttrace->syscall_stats; + struct syscall_stats *stats = NULL; u64 duration = 0; - inode = intlist__findnew(ttrace->syscall_stats, id); - if (inode == NULL) + if (trace->summary_bpf) return; - stats = inode->priv; - if (stats == NULL) { - stats = malloc(sizeof(struct stats)); + if (trace->summary_mode == SUMMARY__BY_TOTAL) + syscall_stats = trace->syscall_stats; + + if (!hashmap__find(syscall_stats, id, &stats)) { + stats = zalloc(sizeof(*stats)); if (stats == NULL) return; - init_stats(stats); - inode->priv = stats; + + init_stats(&stats->stats); + if (hashmap__add(syscall_stats, id, stats) < 0) { + free(stats); + return; + } } if (ttrace->entry_time && sample->time > ttrace->entry_time) duration = sample->time - ttrace->entry_time; - update_stats(stats, duration); + update_stats(&stats->stats, duration); + + if (err < 0) { + ++stats->nr_failures; + + if (!trace->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), + thread__tid(thread)); + return; + } + + stats->errnos = new_errnos; + stats->max_errno = err; + } + + ++stats->errnos[err - 1]; + } } static int trace__printf_interrupted_entry(struct trace *trace) @@ -1782,7 +2720,7 @@ static int trace__printf_interrupted_entry(struct trace *trace) return printed; } -static int trace__fprintf_sample(struct trace *trace, struct perf_evsel *evsel, +static int trace__fprintf_sample(struct trace *trace, struct evsel *evsel, struct perf_sample *sample, struct thread *thread) { int printed = 0; @@ -1791,7 +2729,7 @@ static int trace__fprintf_sample(struct trace *trace, struct perf_evsel *evsel, double ts = (double)sample->time / NSEC_PER_MSEC; printed += fprintf(trace->output, "%22s %10.3f %s %d/%d [%d]\n", - perf_evsel__name(evsel), ts, + evsel__name(evsel), ts, thread__comm_str(thread), sample->pid, sample->tid, sample->cpu); } @@ -1801,7 +2739,6 @@ static int trace__fprintf_sample(struct trace *trace, struct perf_evsel *evsel, 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 @@ -1819,13 +2756,27 @@ static void *syscall__augmented_args(struct syscall *sc, struct perf_sample *sam 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; + if (*augmented_args_size > 0) { + static uintptr_t argbuf[1024]; /* assuming single-threaded */ + + if ((size_t)(*augmented_args_size) > sizeof(argbuf)) + return NULL; + + /* + * The perf ring-buffer is 8-byte aligned but sample->raw_data + * is not because it's preceded by u32 size. Later, beautifier + * will use the augmented args with stricter alignments like in + * some struct. To make sure it's aligned, let's copy the args + * into a static buffer as it's single-threaded for now. + */ + memcpy(argbuf, sample->raw_data + args_size, *augmented_args_size); - return augmented_args; + return argbuf; + } + return NULL; } -static int trace__sys_enter(struct trace *trace, struct perf_evsel *evsel, +static int trace__sys_enter(struct trace *trace, struct evsel *evsel, union perf_event *event __maybe_unused, struct perf_sample *sample) { @@ -1834,16 +2785,17 @@ static int trace__sys_enter(struct trace *trace, struct perf_evsel *evsel, int printed = 0; struct thread *thread; int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1; - int augmented_args_size = 0; + int augmented_args_size = 0, e_machine; void *augmented_args = NULL; - struct syscall *sc = trace__syscall_info(trace, evsel, id); + struct syscall *sc; 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); + e_machine = thread__e_machine(thread, trace->host); + sc = trace__syscall_info(trace, evsel, e_machine, id); + if (sc == NULL) + goto out_put; + ttrace = thread__trace(thread, trace); if (ttrace == NULL) goto out_put; @@ -1904,22 +2856,25 @@ out_put: return err; } -static int trace__fprintf_sys_enter(struct trace *trace, struct perf_evsel *evsel, +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); + struct syscall *sc; char msg[1024]; void *args, *augmented_args = NULL; - int augmented_args_size; + int augmented_args_size, e_machine; + size_t printed = 0; - if (sc == NULL) - return -1; thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); - ttrace = thread__trace(thread, trace->output); + e_machine = thread__e_machine(thread, trace->host); + sc = trace__syscall_info(trace, evsel, e_machine, id); + if (sc == NULL) + goto out_put; + ttrace = thread__trace(thread, trace); /* * 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. @@ -1929,29 +2884,31 @@ static int trace__fprintf_sys_enter(struct trace *trace, struct perf_evsel *evse 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); + printed += syscall__scnprintf_args(sc, msg, sizeof(msg), args, augmented_args, augmented_args_size, trace, thread); + fprintf(trace->output, "%.*s", (int)printed, msg); err = 0; out_put: thread__put(thread); return err; } -static int trace__resolve_callchain(struct trace *trace, struct perf_evsel *evsel, +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->attr.sample_max_stack ? - evsel->attr.sample_max_stack : + int max_stack = evsel->core.attr.sample_max_stack ? + evsel->core.attr.sample_max_stack : trace->max_stack; - int err; + int err = -1; + addr_location__init(&al); if (machine__resolve(trace->host, &al, sample) < 0) - return -1; + goto out; err = thread__resolve_callchain(al.thread, cursor, evsel, sample, NULL, NULL, max_stack); - addr_location__put(&al); +out: + addr_location__exit(&al); return err; } @@ -1962,18 +2919,10 @@ static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sam EVSEL__PRINT_DSO | EVSEL__PRINT_UNKNOWN_AS_ADDR; - return sample__fprintf_callchain(sample, 38, print_opts, &callchain_cursor, trace->output); -} - -static const char *errno_to_name(struct perf_evsel *evsel, int err) -{ - struct perf_env *env = perf_evsel__env(evsel); - const char *arch_name = perf_env__arch(env); - - return arch_syscalls__strerrno(arch_name, err); + return sample__fprintf_callchain(sample, 38, print_opts, get_tls_callchain_cursor(), symbol_conf.bt_stop_list, trace->output); } -static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel, +static int trace__sys_exit(struct trace *trace, struct evsel *evsel, union perf_event *event __maybe_unused, struct perf_sample *sample) { @@ -1982,26 +2931,27 @@ static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel, 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); + int alignment = trace->args_alignment, e_machine; + struct syscall *sc; 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); + e_machine = thread__e_machine(thread, trace->host); + sc = trace__syscall_info(trace, evsel, e_machine, id); + if (sc == NULL) + goto out_put; + ttrace = thread__trace(thread, trace); if (ttrace == NULL) goto out_put; trace__fprintf_sample(trace, evsel, sample, thread); - if (trace->summary) - thread__update_stats(ttrace, id, sample); - ret = perf_evsel__sc_tp_uint(evsel, ret, sample); - if (sc->is_open && ret >= 0 && ttrace->filename.pending_open) { + if (trace->summary) + thread__update_stats(thread, ttrace, id, sample, ret, trace); + + 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; @@ -2016,9 +2966,11 @@ static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel, goto out; if (sample->callchain) { - callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor); + struct callchain_cursor *cursor = get_tls_callchain_cursor(); + + callchain_ret = trace__resolve_callchain(trace, evsel, sample, cursor); if (callchain_ret == 0) { - if (callchain_cursor.nr < trace->min_stack) + if (cursor->nr < trace->min_stack) goto out; callchain_ret = 1; } @@ -2055,8 +3007,9 @@ signed_print: } 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); + struct perf_env *env = evsel__env(evsel) ?: &trace->host_env; + const char *emsg = str_error_r(-ret, bf, sizeof(bf)); + const char *e = perf_env__arch_strerrno(env, err); fprintf(trace->output, "-1 %s (%s)", e, emsg); } @@ -2077,9 +3030,9 @@ errno_print: { else if (sc->fmt->errpid) { struct thread *child = machine__find_thread(trace->host, ret, ret); + fprintf(trace->output, "%ld", ret); if (child != NULL) { - fprintf(trace->output, "%ld", ret); - if (child->comm_set) + if (thread__comm_set(child)) fprintf(trace->output, " (%s)", thread__comm_str(child)); thread__put(child); } @@ -2098,7 +3051,7 @@ errno_print: { if (callchain_ret > 0) trace__fprintf_callchain(trace, sample); else if (callchain_ret < 0) - pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel)); + pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel)); out: ttrace->entry_pending = false; err = 0; @@ -2107,7 +3060,7 @@ out_put: return err; } -static int trace__vfs_getname(struct trace *trace, struct perf_evsel *evsel, +static int trace__vfs_getname(struct trace *trace, struct evsel *evsel, union perf_event *event __maybe_unused, struct perf_sample *sample) { @@ -2116,7 +3069,7 @@ static int trace__vfs_getname(struct trace *trace, struct perf_evsel *evsel, size_t filename_len, entry_str_len, to_move; ssize_t remaining_space; char *pos; - const char *filename = perf_evsel__rawptr(evsel, sample, "pathname"); + const char *filename = evsel__rawptr(evsel, sample, "pathname"); if (!thread) goto out; @@ -2168,16 +3121,16 @@ out: return 0; } -static int trace__sched_stat_runtime(struct trace *trace, struct perf_evsel *evsel, +static int trace__sched_stat_runtime(struct trace *trace, struct evsel *evsel, union perf_event *event __maybe_unused, struct perf_sample *sample) { - u64 runtime = perf_evsel__intval(evsel, sample, "runtime"); + 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); + struct thread_trace *ttrace = thread__trace(thread, trace); if (ttrace == NULL) goto out_dump; @@ -2191,10 +3144,10 @@ out_put: out_dump: fprintf(trace->output, "%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n", evsel->name, - perf_evsel__strval(evsel, sample, "comm"), - (pid_t)perf_evsel__intval(evsel, sample, "pid"), + evsel__strval(evsel, sample, "comm"), + (pid_t)evsel__intval(evsel, sample, "pid"), runtime, - perf_evsel__intval(evsel, sample, "vruntime")); + evsel__intval(evsel, sample, "vruntime")); goto out_put; } @@ -2230,27 +3183,94 @@ static void bpf_output__fprintf(struct trace *trace, ++trace->nr_events_printed; } -static int trace__event_handler(struct trace *trace, struct perf_evsel *evsel, +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); + const struct tep_event *tp_format = evsel__tp_format(evsel); + struct tep_format_field *field = tp_format ? tp_format->format.fields : NULL; + struct syscall_arg_fmt *arg = __evsel__syscall_arg_fmt(evsel); + size_t printed = 0, btf_printed; + 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; + if (tep_field_is_relative(field->flags)) + offset += field->offset + field->size; + } + + 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 show_zero property isn't set. */ + if (val == 0 && !trace->show_zeros && !arg->show_zero && arg->strtoul != STUL_BTF_TYPE) + continue; + + printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : ""); + + if (trace->show_arg_names) + printed += scnprintf(bf + printed, size - printed, "%s: ", field->name); + + btf_printed = trace__btf_scnprintf(trace, &syscall_arg, bf + printed, size - printed, val, field->type); + if (btf_printed) { + printed += btf_printed; + continue; + } + + printed += syscall_arg_fmt__scnprintf_val(arg, bf + printed, size - printed, &syscall_arg, val); + } + + return fprintf(trace->output, "%.*s", (int)printed, 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) + + if (evsel->nr_events_printed >= evsel->max_events) 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); + struct callchain_cursor *cursor = get_tls_callchain_cursor(); + + callchain_ret = trace__resolve_callchain(trace, evsel, sample, cursor); if (callchain_ret == 0) { - if (callchain_cursor.nr < trace->min_stack) + if (cursor->nr < trace->min_stack) goto out; callchain_ret = 1; } @@ -2265,9 +3285,10 @@ static int trace__event_handler(struct trace *trace, struct perf_evsel *evsel, if (thread) trace__fprintf_comm_tid(trace, thread, trace->output); - if (evsel == trace->syscalls.events.augmented) { + if (evsel == trace->syscalls.events.bpf_output) { int id = perf_evsel__sc_tp_uint(evsel, id, sample); - struct syscall *sc = trace__syscall_info(trace, evsel, id); + int e_machine = thread ? thread__e_machine(thread, trace->host) : EM_HOST; + struct syscall *sc = trace__syscall_info(trace, evsel, e_machine, id); if (sc) { fprintf(trace->output, "%s(", sc->name); @@ -2283,32 +3304,39 @@ static int trace__event_handler(struct trace *trace, struct perf_evsel *evsel, */ } - fprintf(trace->output, "%s:", evsel->name); + fprintf(trace->output, "%s(", evsel->name); - if (perf_evsel__is_bpf_output(evsel)) { + 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)) { - event_format__fprintf(evsel->tp_format, sample->cpu, - sample->raw_data, sample->raw_size, - trace->output); - ++trace->nr_events_printed; - - if (evsel->max_events != ULONG_MAX && ++evsel->nr_events_printed == evsel->max_events) { - perf_evsel__disable(evsel); - perf_evsel__close(evsel); + } else { + const struct tep_event *tp_format = evsel__tp_format(evsel); + + if (tp_format && (strncmp(tp_format->name, "sys_enter_", 10) || + trace__fprintf_sys_enter(trace, evsel, sample))) { + if (trace->libtraceevent_print) { + event_format__fprintf(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"); + fprintf(trace->output, ")\n"); if (callchain_ret > 0) trace__fprintf_callchain(trace, sample); else if (callchain_ret < 0) - pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel)); + 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; @@ -2320,7 +3348,7 @@ static void print_location(FILE *f, struct perf_sample *sample, { if ((verbose > 0 || print_dso) && al->map) - fprintf(f, "%s@", al->map->dso->long_name); + fprintf(f, "%s@", dso__long_name(map__dso(al->map))); if ((verbose > 0 || print_sym) && al->sym) fprintf(f, "%s+0x%" PRIx64, al->sym->name, @@ -2332,7 +3360,7 @@ static void print_location(FILE *f, struct perf_sample *sample, } static int trace__pgfault(struct trace *trace, - struct perf_evsel *evsel, + struct evsel *evsel, union perf_event *event __maybe_unused, struct perf_sample *sample) { @@ -2343,25 +3371,31 @@ static int trace__pgfault(struct trace *trace, int err = -1; int callchain_ret = 0; + addr_location__init(&al); thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); if (sample->callchain) { - callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor); + struct callchain_cursor *cursor = get_tls_callchain_cursor(); + + callchain_ret = trace__resolve_callchain(trace, evsel, sample, cursor); if (callchain_ret == 0) { - if (callchain_cursor.nr < trace->min_stack) + if (cursor->nr < trace->min_stack) goto out_put; callchain_ret = 1; } } - ttrace = thread__trace(thread, trace->output); + ttrace = thread__trace(thread, trace); if (ttrace == NULL) goto out_put; - if (evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ) + if (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ) { ttrace->pfmaj++; - else + trace->pfmaj++; + } else { ttrace->pfmin++; + trace->pfmin++; + } if (trace->summary_only) goto out; @@ -2371,7 +3405,7 @@ static int trace__pgfault(struct trace *trace, trace__fprintf_entry_head(trace, thread, 0, true, sample->time, trace->output); fprintf(trace->output, "%sfault [", - evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ? + evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ? "maj" : "min"); print_location(trace->output, sample, &al, false, true); @@ -2396,18 +3430,19 @@ static int trace__pgfault(struct trace *trace, if (callchain_ret > 0) trace__fprintf_callchain(trace, sample); else if (callchain_ret < 0) - pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel)); + pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel)); ++trace->nr_events_printed; out: err = 0; out_put: thread__put(thread); + addr_location__exit(&al); return err; } static void trace__set_base_time(struct trace *trace, - struct perf_evsel *evsel, + struct evsel *evsel, struct perf_sample *sample) { /* @@ -2419,14 +3454,14 @@ static void trace__set_base_time(struct trace *trace, * appears in our event stream (vfs_getname comes to mind). */ if (trace->base_time == 0 && !trace->full_time && - (evsel->attr.sample_type & PERF_SAMPLE_TIME)) + (evsel->core.attr.sample_type & PERF_SAMPLE_TIME)) trace->base_time = sample->time; } -static int trace__process_sample(struct perf_tool *tool, +static int trace__process_sample(const struct perf_tool *tool, union perf_event *event, struct perf_sample *sample, - struct perf_evsel *evsel, + struct evsel *evsel, struct machine *machine __maybe_unused) { struct trace *trace = container_of(tool, struct trace, tool); @@ -2460,21 +3495,23 @@ static int trace__record(struct trace *trace, int argc, const char **argv) "-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; - /* +1 is for the event string below */ - rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 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) - return -ENOMEM; + if (rec_argv == NULL || filter == NULL) + goto out_free; j = 0; for (i = 0; i < ARRAY_SIZE(record_args); i++) @@ -2491,11 +3528,13 @@ static int trace__record(struct trace *trace, int argc, const char **argv) rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit"; else { pr_err("Neither raw_syscalls nor syscalls events exist.\n"); - free(rec_argv); - return -1; + 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]; @@ -2507,31 +3546,50 @@ static int trace__record(struct trace *trace, int argc, const char **argv) for (i = 0; i < (unsigned int)argc; i++) rec_argv[j++] = argv[i]; - return cmd_record(j, rec_argv); + 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 size_t trace__fprintf_total_summary(struct trace *trace, FILE *fp); -static bool perf_evlist__add_vfs_getname(struct perf_evlist *evlist) +static bool evlist__add_vfs_getname(struct evlist *evlist) { - struct perf_evsel *evsel = perf_evsel__newtp("probe", "vfs_getname"); + bool found = false; + struct evsel *evsel, *tmp; + struct parse_events_error err; + int ret; - if (IS_ERR(evsel)) + parse_events_error__init(&err); + ret = parse_events(evlist, "probe:vfs_getname*", &err); + parse_events_error__exit(&err); + if (ret) return false; - if (perf_evsel__field(evsel, "pathname") == NULL) { - perf_evsel__delete(evsel); - 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); } - evsel->handler = trace__vfs_getname; - perf_evlist__add(evlist, evsel); - return true; + return found; } -static struct perf_evsel *perf_evsel__new_pgfault(u64 config) +static struct evsel *evsel__new_pgfault(u64 config) { - struct perf_evsel *evsel; + struct evsel *evsel; struct perf_event_attr attr = { .type = PERF_TYPE_SOFTWARE, .mmap_data = 1, @@ -2542,35 +3600,48 @@ static struct perf_evsel *perf_evsel__new_pgfault(u64 config) event_attr_init(&attr); - evsel = perf_evsel__new(&attr); + evsel = evsel__new(&attr); if (evsel) evsel->handler = trace__pgfault; return evsel; } +static void evlist__free_syscall_tp_fields(struct evlist *evlist) +{ + struct evsel *evsel; + + evlist__for_each_entry(evlist, evsel) { + evsel_trace__delete(evsel->priv); + evsel->priv = NULL; + } +} + static void trace__handle_event(struct trace *trace, union perf_event *event, struct perf_sample *sample) { const u32 type = event->header.type; - struct perf_evsel *evsel; + 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); + evsel = 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->attr.type == PERF_TYPE_TRACEPOINT && + if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT && sample->raw_data == NULL) { fprintf(trace->output, "%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n", - perf_evsel__name(evsel), sample->tid, + evsel__name(evsel), sample->tid, sample->cpu, sample->raw_size); } else { tracepoint_handler handler = evsel->handler; @@ -2584,8 +3655,8 @@ static void trace__handle_event(struct trace *trace, union perf_event *event, st static int trace__add_syscall_newtp(struct trace *trace) { int ret = -1; - struct perf_evlist *evlist = trace->evlist; - struct perf_evsel *sys_enter, *sys_exit; + 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) @@ -2601,11 +3672,11 @@ static int trace__add_syscall_newtp(struct trace *trace) if (perf_evsel__init_sc_tp_uint_field(sys_exit, ret)) goto out_delete_sys_exit; - perf_evsel__config_callchain(sys_enter, &trace->opts, &callchain_param); - perf_evsel__config_callchain(sys_exit, &trace->opts, &callchain_param); + evsel__config_callchain(sys_enter, &trace->opts, &callchain_param); + evsel__config_callchain(sys_exit, &trace->opts, &callchain_param); - perf_evlist__add(evlist, sys_enter); - perf_evlist__add(evlist, sys_exit); + evlist__add(evlist, sys_enter); + evlist__add(evlist, sys_exit); if (callchain_param.enabled && !trace->kernel_syscallchains) { /* @@ -2613,7 +3684,7 @@ static int trace__add_syscall_newtp(struct trace *trace) * leading to the syscall, allow overriding that for * debugging reasons using --kernel_syscall_callchains */ - sys_exit->attr.exclude_callchain_kernel = 1; + sys_exit->core.attr.exclude_callchain_kernel = 1; } trace->syscalls.events.sys_enter = sys_enter; @@ -2624,16 +3695,16 @@ out: return ret; out_delete_sys_exit: - perf_evsel__delete_priv(sys_exit); + evsel__delete_priv(sys_exit); out_delete_sys_enter: - perf_evsel__delete_priv(sys_enter); + evsel__delete_priv(sys_enter); goto out; } static int trace__set_ev_qualifier_tp_filter(struct trace *trace) { int err = -1; - struct perf_evsel *sys_exit; + 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); @@ -2641,10 +3712,9 @@ static int trace__set_ev_qualifier_tp_filter(struct trace *trace) if (filter == NULL) goto out_enomem; - if (!perf_evsel__append_tp_filter(trace->syscalls.events.sys_enter, - filter)) { + if (!evsel__append_tp_filter(trace->syscalls.events.sys_enter, filter)) { sys_exit = trace->syscalls.events.sys_exit; - err = perf_evsel__append_tp_filter(sys_exit, filter); + err = evsel__append_tp_filter(sys_exit, filter); } free(filter); @@ -2656,90 +3726,391 @@ out_enomem: } #ifdef HAVE_LIBBPF_SUPPORT -static int trace__set_ev_qualifier_bpf_filter(struct trace *trace) + +static struct bpf_program *unaugmented_prog; + +static int syscall_arg_fmt__cache_btf_struct(struct syscall_arg_fmt *arg_fmt, struct btf *btf, char *type) { - 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; + int id; - for (i = 0; i < trace->ev_qualifier_ids.nr; ++i) { - int key = trace->ev_qualifier_ids.entries[i]; + if (arg_fmt->type != NULL) + return -1; - err = bpf_map_update_elem(fd, &key, &value, BPF_EXIST); - if (err) - break; - } + id = btf__find_by_name(btf, type); + if (id < 0) + return -1; - return err; + arg_fmt->type = btf__type_by_id(btf, id); + arg_fmt->type_id = id; + + return 0; } -static int __trace__init_syscalls_bpf_map(struct trace *trace, bool enabled) +static struct bpf_program *trace__find_syscall_bpf_prog(struct trace *trace __maybe_unused, + struct syscall *sc, + const char *prog_name, const char *type) { - int fd = bpf_map__fd(trace->syscalls.map); - struct bpf_map_syscall_entry value = { - .enabled = enabled, - }; - int err = 0, key; + struct bpf_program *prog; - for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) { - err = bpf_map_update_elem(fd, &key, &value, BPF_ANY); - if (err) - break; + if (prog_name == NULL) { + char default_prog_name[256]; + scnprintf(default_prog_name, sizeof(default_prog_name), "tp/syscalls/sys_%s_%s", type, sc->name); + prog = augmented_syscalls__find_by_title(default_prog_name); + if (prog != NULL) + goto out_found; + if (sc->fmt && sc->fmt->alias) { + scnprintf(default_prog_name, sizeof(default_prog_name), "tp/syscalls/sys_%s_%s", type, sc->fmt->alias); + prog = augmented_syscalls__find_by_title(default_prog_name); + if (prog != NULL) + goto out_found; + } + goto out_unaugmented; } - return err; + prog = augmented_syscalls__find_by_title(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 unaugmented_prog; } -static int trace__init_syscalls_bpf_map(struct trace *trace) +static void trace__init_syscall_bpf_progs(struct trace *trace, int e_machine, int id) { - bool enabled = true; + struct syscall *sc = trace__syscall_info(trace, NULL, e_machine, id); - if (trace->ev_qualifier_ids.nr) - enabled = trace->not_ev_qualifier; + if (sc == NULL) + return; - return __trace__init_syscalls_bpf_map(trace, enabled); + 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"); } -#else -static int trace__set_ev_qualifier_bpf_filter(struct trace *trace __maybe_unused) + +static int trace__bpf_prog_sys_enter_fd(struct trace *trace, int e_machine, int id) { - return 0; + struct syscall *sc = trace__syscall_info(trace, NULL, e_machine, id); + return sc ? bpf_program__fd(sc->bpf_prog.sys_enter) : bpf_program__fd(unaugmented_prog); } -static int trace__init_syscalls_bpf_map(struct trace *trace __maybe_unused) +static int trace__bpf_prog_sys_exit_fd(struct trace *trace, int e_machine, int id) { - return 0; + struct syscall *sc = trace__syscall_info(trace, NULL, e_machine, id); + return sc ? bpf_program__fd(sc->bpf_prog.sys_exit) : bpf_program__fd(unaugmented_prog); } -#endif // HAVE_LIBBPF_SUPPORT -static int trace__set_ev_qualifier_filter(struct trace *trace) +static int trace__bpf_sys_enter_beauty_map(struct trace *trace, int e_machine, int key, unsigned int *beauty_array) { - 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; + struct tep_format_field *field; + struct syscall *sc = trace__syscall_info(trace, NULL, e_machine, key); + const struct btf_type *bt; + char *struct_offset, *tmp, name[32]; + bool can_augment = false; + int i, cnt; + + if (sc == NULL) + return -1; + + trace__load_vmlinux_btf(trace); + if (trace->btf == NULL) + return -1; + + for (i = 0, field = sc->args; field; ++i, field = field->next) { + // XXX We're only collecting pointer payloads _from_ user space + if (!sc->arg_fmt[i].from_user) + continue; + + struct_offset = strstr(field->type, "struct "); + if (struct_offset == NULL) + struct_offset = strstr(field->type, "union "); + else + struct_offset++; // "union" is shorter + + if (field->flags & TEP_FIELD_IS_POINTER && struct_offset) { /* struct or union (think BPF's attr arg) */ + struct_offset += 6; + + /* for 'struct foo *', we only want 'foo' */ + for (tmp = struct_offset, cnt = 0; *tmp != ' ' && *tmp != '\0'; ++tmp, ++cnt) { + } + + strncpy(name, struct_offset, cnt); + name[cnt] = '\0'; + + /* cache struct's btf_type and type_id */ + if (syscall_arg_fmt__cache_btf_struct(&sc->arg_fmt[i], trace->btf, name)) + continue; + + bt = sc->arg_fmt[i].type; + beauty_array[i] = bt->size; + can_augment = true; + } else if (field->flags & TEP_FIELD_IS_POINTER && /* string */ + strcmp(field->type, "const char *") == 0 && + (strstr(field->name, "name") || + strstr(field->name, "path") || + strstr(field->name, "file") || + strstr(field->name, "root") || + strstr(field->name, "key") || + strstr(field->name, "special") || + strstr(field->name, "type") || + strstr(field->name, "description"))) { + beauty_array[i] = 1; + can_augment = true; + } else if (field->flags & TEP_FIELD_IS_POINTER && /* buffer */ + strstr(field->type, "char *") && + (strstr(field->name, "buf") || + strstr(field->name, "val") || + strstr(field->name, "msg"))) { + int j; + struct tep_format_field *field_tmp; + + /* find the size of the buffer that appears in pairs with buf */ + for (j = 0, field_tmp = sc->args; field_tmp; ++j, field_tmp = field_tmp->next) { + if (!(field_tmp->flags & TEP_FIELD_IS_POINTER) && /* only integers */ + (strstr(field_tmp->name, "count") || + strstr(field_tmp->name, "siz") || /* size, bufsiz */ + (strstr(field_tmp->name, "len") && strcmp(field_tmp->name, "filename")))) { + /* filename's got 'len' in it, we don't want that */ + beauty_array[i] = -(j + 1); + can_augment = true; + break; + } + } + } + } + + if (can_augment) + return 0; + + return -1; +} + +static struct bpf_program *trace__find_usable_bpf_prog_entry(struct trace *trace, + struct syscall *sc) +{ + struct tep_format_field *field, *candidate_field; + /* + * 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 (int i = 0, num_idx = syscalltbl__num_idx(sc->e_machine); i < num_idx; ++i) { + int id = syscalltbl__id_at_idx(sc->e_machine, i); + struct syscall *pair = trace__syscall_info(trace, NULL, sc->e_machine, id); + struct bpf_program *pair_prog; + bool is_candidate = false; + + if (pair == NULL || pair->id == sc->id || + pair->bpf_prog.sys_enter == 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; + + /* + * This is limited in the BPF program but sys_write + * uses "const char *" for its "buf" arg so we need to + * use some heuristic that is kinda future proof... + */ + if (strcmp(field->type, "const char *") == 0 && + !(strstr(field->name, "name") || + strstr(field->name, "path") || + strstr(field->name, "file") || + strstr(field->name, "root") || + strstr(field->name, "description"))) + 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 == 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 bpf_map__set_filter_pids(struct bpf_map *map __maybe_unused, - size_t npids __maybe_unused, pid_t *pids __maybe_unused) +static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace, int e_machine) { + int map_enter_fd; + int map_exit_fd; + int beauty_map_fd; int err = 0; -#ifdef HAVE_LIBBPF_SUPPORT - bool value = true; - int map_fd = bpf_map__fd(map); - size_t i; + unsigned int beauty_array[6]; + + if (augmented_syscalls__get_map_fds(&map_enter_fd, &map_exit_fd, &beauty_map_fd) < 0) + return -1; + + unaugmented_prog = augmented_syscalls__unaugmented(); + + for (int i = 0, num_idx = syscalltbl__num_idx(e_machine); i < num_idx; ++i) { + int prog_fd, key = syscalltbl__id_at_idx(e_machine, i); + + if (!trace__syscall_enabled(trace, key)) + continue; - for (i = 0; i < npids; ++i) { - err = bpf_map_update_elem(map_fd, &pids[i], &value, BPF_ANY); + trace__init_syscall_bpf_progs(trace, e_machine, key); + + // It'll get at least the "!raw_syscalls:unaugmented" + prog_fd = trace__bpf_prog_sys_enter_fd(trace, e_machine, 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, e_machine, key); + err = bpf_map_update_elem(map_exit_fd, &key, &prog_fd, BPF_ANY); + if (err) + break; + + /* use beauty_map to tell BPF how many bytes to collect, set beauty_map's value here */ + memset(beauty_array, 0, sizeof(beauty_array)); + err = trace__bpf_sys_enter_beauty_map(trace, e_machine, key, (unsigned int *)beauty_array); + if (err) + continue; + err = bpf_map_update_elem(beauty_map_fd, &key, beauty_array, BPF_ANY); if (err) break; } -#endif + + /* + * 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 (int i = 0, num_idx = syscalltbl__num_idx(e_machine); i < num_idx; ++i) { + int key = syscalltbl__id_at_idx(e_machine, i); + struct syscall *sc = trace__syscall_info(trace, NULL, e_machine, 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 != 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; } +#else // !HAVE_LIBBPF_SUPPORT +static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace __maybe_unused, + int e_machine __maybe_unused) +{ + return -1; +} +#endif // HAVE_LIBBPF_SUPPORT + +static int trace__set_ev_qualifier_filter(struct trace *trace) +{ + if (trace->syscalls.events.sys_enter) + return trace__set_ev_qualifier_tp_filter(trace); + return 0; +} static int trace__set_filter_loop_pids(struct trace *trace) { @@ -2750,21 +4121,27 @@ static int trace__set_filter_loop_pids(struct trace *trace) 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); + struct thread *parent = machine__find_thread(trace->host, + thread__ppid(thread), + thread__ppid(thread)); if (parent == NULL) break; - if (!strcmp(thread__comm_str(parent), "sshd")) { - pids[nr++] = parent->tid; + if (!strcmp(thread__comm_str(parent), "sshd") || + strstarts(thread__comm_str(parent), "gnome-terminal")) { + pids[nr++] = thread__tid(parent); + thread__put(parent); break; } + thread__put(thread); thread = parent; } + thread__put(thread); - err = perf_evlist__set_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); + err = evlist__append_tp_filter_pids(trace->evlist, nr, pids); + if (!err) + err = augmented_syscalls__set_filter_pids(nr, pids); return err; } @@ -2776,16 +4153,16 @@ static int trace__set_filter_pids(struct trace *trace) * 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. + * we fork the workload in evlist__prepare_workload. */ if (trace->filter_pids.nr > 0) { - err = perf_evlist__set_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, + err = evlist__append_tp_filter_pids(trace->evlist, trace->filter_pids.nr, + trace->filter_pids.entries); + if (!err) { + err = augmented_syscalls__set_filter_pids(trace->filter_pids.nr, trace->filter_pids.entries); } - } else if (thread_map__pid(trace->evlist->threads, 0) == -1) { + } else if (perf_thread_map__pid(trace->evlist->core.threads, 0) == -1) { err = trace__set_filter_loop_pids(trace); } @@ -2794,16 +4171,18 @@ static int trace__set_filter_pids(struct trace *trace) static int __trace__deliver_event(struct trace *trace, union perf_event *event) { - struct perf_evlist *evlist = trace->evlist; + struct evlist *evlist = trace->evlist; struct perf_sample sample; int err; - err = perf_evlist__parse_sample(evlist, event, &sample); + perf_sample__init(&sample, /*all=*/false); + err = 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); + perf_sample__exit(&sample); return 0; } @@ -2831,11 +4210,11 @@ static int trace__deliver_event(struct trace *trace, union perf_event *event) if (!trace->sort_events) return __trace__deliver_event(trace, event); - err = perf_evlist__parse_sample_timestamp(trace->evlist, event, &trace->oe.last); + err = 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); + err = ordered_events__queue(&trace->oe.data, event, trace->oe.last, 0, NULL); if (err) return err; @@ -2850,10 +4229,153 @@ static int ordered_events__deliver_event(struct ordered_events *oe, return __trace__deliver_event(trace, event->event); } +static struct syscall_arg_fmt *evsel__find_syscall_arg_fmt_by_name(struct evsel *evsel, char *arg, + char **type) +{ + struct syscall_arg_fmt *fmt = __evsel__syscall_arg_fmt(evsel); + const struct tep_event *tp_format; + + if (!fmt) + return NULL; + + tp_format = evsel__tp_format(evsel); + if (!tp_format) + return NULL; + + for (const struct tep_format_field *field = tp_format->format.fields; field; + field = field->next, ++fmt) { + if (strcmp(field->name, arg) == 0) { + *type = field->type; + return fmt; + } + } + + return NULL; +} + +static int trace__expand_filter(struct trace *trace, 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], *type; + + 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, &type); + 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 = { + .trace = trace, + .fmt = fmt, + .type_name = type, + .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 perf_evlist *evlist = trace->evlist; - struct perf_evsel *evsel, *pgfault_maj = NULL, *pgfault_min = NULL; + 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; @@ -2861,35 +4383,44 @@ static int trace__run(struct trace *trace, int argc, const char **argv) trace->live = true; + if (trace->summary_bpf) { + if (trace_prepare_bpf_summary(trace->summary_mode) < 0) + goto out_delete_evlist; + + if (trace->summary_only) + goto create_maps; + } + 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 = perf_evlist__add_vfs_getname(evlist); + trace->vfs_getname = evlist__add_vfs_getname(evlist); } if ((trace->trace_pgfaults & TRACE_PFMAJ)) { - pgfault_maj = perf_evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MAJ); + pgfault_maj = evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MAJ); if (pgfault_maj == NULL) goto out_error_mem; - perf_evsel__config_callchain(pgfault_maj, &trace->opts, &callchain_param); - perf_evlist__add(evlist, pgfault_maj); + evsel__config_callchain(pgfault_maj, &trace->opts, &callchain_param); + evlist__add(evlist, pgfault_maj); } if ((trace->trace_pgfaults & TRACE_PFMIN)) { - pgfault_min = perf_evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MIN); + pgfault_min = evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MIN); if (pgfault_min == NULL) goto out_error_mem; - perf_evsel__config_callchain(pgfault_min, &trace->opts, &callchain_param); - perf_evlist__add(evlist, pgfault_min); + evsel__config_callchain(pgfault_min, &trace->opts, &callchain_param); + evlist__add(evlist, pgfault_min); } + /* Enable ignoring missing threads when -p option is defined. */ + trace->opts.ignore_missing_thread = trace->opts.target.pid; + if (trace->sched && - perf_evlist__add_newtp(evlist, "sched", "sched_stat_runtime", - trace__sched_stat_runtime)) + 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.: @@ -2918,52 +4449,51 @@ static int trace__run(struct trace *trace, int argc, const char **argv) if (trace->cgroup) evlist__set_default_cgroup(trace->evlist, trace->cgroup); - err = perf_evlist__create_maps(evlist, &trace->opts.target); +create_maps: + err = 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); + err = trace__symbols_init(trace, argc, argv, evlist); if (err < 0) { fprintf(trace->output, "Problems initializing symbol libraries!\n"); goto out_delete_evlist; } - perf_evlist__config(evlist, &trace->opts, &callchain_param); + if (trace->summary_mode == SUMMARY__BY_TOTAL && !trace->summary_bpf) { + trace->syscall_stats = alloc_syscall_stats(); + if (IS_ERR(trace->syscall_stats)) + goto out_delete_evlist; + } - signal(SIGCHLD, sig_handler); - signal(SIGINT, sig_handler); + evlist__config(evlist, &trace->opts, &callchain_param); if (forks) { - err = perf_evlist__prepare_workload(evlist, &trace->opts.target, - argv, false, NULL); + err = 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; } + workload_pid = evlist->workload.pid; } - err = perf_evlist__open(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; - } + augmented_syscalls__setup_bpf_output(); err = trace__set_filter_pids(trace); if (err < 0) goto out_error_mem; - if (trace->syscalls.map) - trace__init_syscalls_bpf_map(trace); + /* + * TODO: Initialize for all host binary machine types, not just + * those matching the perf binary. + */ + trace__init_syscalls_bpf_prog_array_maps(trace, EM_HOST); if (trace->ev_qualifier_ids.nr > 0) { err = trace__set_ev_qualifier_filter(trace); @@ -2976,76 +4506,98 @@ static int trace__run(struct trace *trace, int argc, const char **argv) } } - err = perf_evlist__apply_filters(evlist, &evsel); + /* + * 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. + */ + /* TODO: support for more than just perf binary machine type close. */ + trace->fd_path_disabled = !trace__syscall_enabled(trace, syscalltbl__id(EM_HOST, "close")); + + err = trace__expand_filters(trace, &evsel); + if (err) + goto out_delete_evlist; + err = evlist__apply_filters(evlist, &evsel, &trace->opts.target); if (err < 0) goto out_error_apply_filters; - err = perf_evlist__mmap(evlist, trace->opts.mmap_pages); - if (err < 0) - goto out_error_mmap; + if (!trace->summary_only || !trace->summary_bpf) { + 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) - perf_evlist__enable(evlist); + if (!target__none(&trace->opts.target) && !trace->opts.target.initial_delay) + evlist__enable(evlist); if (forks) - perf_evlist__start_workload(evlist); + evlist__start_workload(evlist); - if (trace->opts.initial_delay) { - usleep(trace->opts.initial_delay * 1000); - perf_evlist__enable(evlist); + if (trace->opts.target.initial_delay) { + usleep(trace->opts.target.initial_delay * 1000); + evlist__enable(evlist); } - trace->multiple_threads = thread_map__pid(evlist->threads, 0) == -1 || - evlist->threads->nr > 1 || - perf_evlist__first(evlist)->attr.inherit; + if (trace->summary_bpf) + trace_start_bpf_summary(); + + trace->multiple_threads = perf_thread_map__pid(evlist->core.threads, 0) == -1 || + perf_thread_map__nr(evlist->core.threads) > 1 || + evlist__first(evlist)->core.attr.inherit; /* - * Now that we already used evsel->attr to ask the kernel to setup the - * events, lets reuse evsel->attr.sample_max_stack as the limit in + * 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->attr.sample_max_stack == 0) - evsel->attr.sample_max_stack = trace->max_stack; + 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->nr_mmaps; i++) { + for (i = 0; i < evlist->core.nr_mmaps; i++) { union perf_event *event; - struct perf_mmap *md; + struct mmap *md; md = &evlist->mmap[i]; - if (perf_mmap__read_init(md) < 0) + if (perf_mmap__read_init(&md->core) < 0) continue; - while ((event = perf_mmap__read_event(md)) != NULL) { + 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); + perf_mmap__consume(&md->core); if (interrupted) goto out_disable; if (done && !draining) { - perf_evlist__disable(evlist); + evlist__disable(evlist); draining = true; } } - perf_mmap__read_done(md); + perf_mmap__read_done(&md->core); } if (trace->nr_events == before) { int timeout = done ? 100 : -1; - if (!draining && perf_evlist__poll(evlist, timeout) > 0) { - if (perf_evlist__filter_pollfd(evlist, POLLERR | POLLHUP | POLLNVAL) == 0) + if (!draining && evlist__poll(evlist, timeout) > 0) { + if (evlist__filter_pollfd(evlist, POLLERR | POLLHUP | POLLNVAL) == 0) draining = true; goto again; @@ -3060,14 +4612,23 @@ again: out_disable: thread__zput(trace->current); - perf_evlist__disable(evlist); + evlist__disable(evlist); + + if (trace->summary_bpf) + trace_end_bpf_summary(); 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->summary) { + if (trace->summary_bpf) + trace_print_bpf_summary(trace->output, trace->max_summary); + else if (trace->summary_mode == SUMMARY__BY_TOTAL) + trace__fprintf_total_summary(trace, trace->output); + else + trace__fprintf_thread_summary(trace, trace->output); + } if (trace->show_tool_stats) { fprintf(trace->output, "Stats:\n " @@ -3079,9 +4640,11 @@ out_disable: } out_delete_evlist: + trace_cleanup_bpf_summary(); + delete_syscall_stats(trace->syscall_stats); trace__symbols__exit(trace); - - perf_evlist__delete(evlist); + evlist__free_syscall_tp_fields(evlist); + evlist__delete(evlist); cgroup__put(trace->cgroup); trace->evlist = NULL; trace->live = false; @@ -3098,11 +4661,11 @@ out_error_raw_syscalls: goto out_error; out_error_mmap: - perf_evlist__strerror_mmap(evlist, errno, errbuf, sizeof(errbuf)); + evlist__strerror_mmap(evlist, errno, errbuf, sizeof(errbuf)); goto out_error; out_error_open: - perf_evlist__strerror_open(evlist, errno, errbuf, sizeof(errbuf)); + evlist__strerror_open(evlist, errno, errbuf, sizeof(errbuf)); out_error: fprintf(trace->output, "%s\n", errbuf); @@ -3111,7 +4674,7 @@ out_error: out_error_apply_filters: fprintf(trace->output, "Failed to set filter \"%s\" on event %s with %d (%s)\n", - evsel->filter, perf_evsel__name(evsel), errno, + evsel->filter, evsel__name(evsel), errno, str_error_r(errno, errbuf, sizeof(errbuf))); goto out_delete_evlist; } @@ -3126,20 +4689,19 @@ out_errno: static int trace__replay(struct trace *trace) { - const struct perf_evsel_str_handler handlers[] = { + const struct evsel_str_handler handlers[] = { { "probe:vfs_getname", trace__vfs_getname, }, }; struct perf_data data = { - .file = { - .path = input_name, - }, - .mode = PERF_DATA_MODE_READ, - .force = trace->force, + .path = input_name, + .mode = PERF_DATA_MODE_READ, + .force = trace->force, }; struct perf_session *session; - struct perf_evsel *evsel; + struct evsel *evsel; int err = -1; + perf_tool__init(&trace->tool, /*ordered_events=*/true); trace->tool.sample = trace__process_sample; trace->tool.mmap = perf_event__process_mmap; trace->tool.mmap2 = perf_event__process_mmap2; @@ -3157,9 +4719,9 @@ static int trace__replay(struct trace *trace) /* add tid to output */ trace->multiple_threads = true; - session = perf_session__new(&data, false, &trace->tool); - if (session == NULL) - return -1; + session = perf_session__new(&data, &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); @@ -3167,7 +4729,7 @@ static int trace__replay(struct trace *trace) if (trace->opts.target.tid) symbol_conf.tid_list_str = strdup(trace->opts.target.tid); - if (symbol__init(&session->header.env) < 0) + if (symbol__init(perf_session__env(session)) < 0) goto out; trace->host = &session->machines.host; @@ -3176,40 +4738,44 @@ static int trace__replay(struct trace *trace) if (err) goto out; - evsel = perf_evlist__find_tracepoint_by_name(session->evlist, - "raw_syscalls:sys_enter"); + evsel = evlist__find_tracepoint_by_name(session->evlist, "raw_syscalls:sys_enter"); + trace->syscalls.events.sys_enter = evsel; /* older kernels have syscalls tp versus raw_syscalls */ if (evsel == NULL) - evsel = perf_evlist__find_tracepoint_by_name(session->evlist, - "syscalls:sys_enter"); + evsel = evlist__find_tracepoint_by_name(session->evlist, "syscalls:sys_enter"); if (evsel && - (perf_evsel__init_raw_syscall_tp(evsel, trace__sys_enter) < 0 || + (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"); + evsel = evlist__find_tracepoint_by_name(session->evlist, "raw_syscalls:sys_exit"); + trace->syscalls.events.sys_exit = evsel; if (evsel == NULL) - evsel = perf_evlist__find_tracepoint_by_name(session->evlist, - "syscalls:sys_exit"); + evsel = evlist__find_tracepoint_by_name(session->evlist, "syscalls:sys_exit"); if (evsel && - (perf_evsel__init_raw_syscall_tp(evsel, trace__sys_exit) < 0 || + (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->attr.type == PERF_TYPE_SOFTWARE && - (evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ || - evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MIN || - evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS)) + 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; } + if (trace->summary_mode == SUMMARY__BY_TOTAL) { + trace->syscall_stats = alloc_syscall_stats(); + if (IS_ERR(trace->syscall_stats)) + goto out; + } + setup_pager(); err = perf_session__process_events(session); @@ -3220,12 +4786,13 @@ static int trace__replay(struct trace *trace) trace__fprintf_thread_summary(trace, trace->output); out: + delete_syscall_stats(trace->syscall_stats); perf_session__delete(session); return err; } -static size_t trace__fprintf_threads_header(FILE *fp) +static size_t trace__fprintf_summary_header(FILE *fp) { size_t printed; @@ -3234,67 +4801,125 @@ static size_t trace__fprintf_threads_header(FILE *fp) return printed; } -DEFINE_RESORT_RB(syscall_stats, a->msecs > b->msecs, - struct stats *stats; - double msecs; - int syscall; -) +struct syscall_entry { + struct syscall_stats *stats; + double msecs; + int syscall; +}; + +static int entry_cmp(const void *e1, const void *e2) { - struct int_node *source = rb_entry(nd, struct int_node, rb_node); - struct stats *stats = source->priv; + const struct syscall_entry *entry1 = e1; + const struct syscall_entry *entry2 = e2; - entry->syscall = source->i; - entry->stats = stats; - entry->msecs = stats ? (u64)stats->n * (avg_stats(stats) / NSEC_PER_MSEC) : 0; + return entry1->msecs > entry2->msecs ? -1 : 1; } -static size_t thread__dump_stats(struct thread_trace *ttrace, - struct trace *trace, FILE *fp) +static struct syscall_entry *syscall__sort_stats(struct hashmap *syscall_stats) +{ + struct syscall_entry *entry; + struct hashmap_entry *pos; + unsigned bkt, i, nr; + + nr = syscall_stats->sz; + entry = malloc(nr * sizeof(*entry)); + if (entry == NULL) + return NULL; + + i = 0; + hashmap__for_each_entry(syscall_stats, pos, bkt) { + struct syscall_stats *ss = pos->pvalue; + struct stats *st = &ss->stats; + + entry[i].stats = ss; + entry[i].msecs = (u64)st->n * (avg_stats(st) / NSEC_PER_MSEC); + entry[i].syscall = pos->key; + i++; + } + assert(i == nr); + + qsort(entry, nr, sizeof(*entry), entry_cmp); + return entry; +} + +static size_t syscall__dump_stats(struct trace *trace, int e_machine, FILE *fp, + struct hashmap *syscall_stats) { size_t printed = 0; + int lines = 0; struct syscall *sc; - struct rb_node *nd; - DECLARE_RESORT_RB_INTLIST(syscall_stats, ttrace->syscall_stats); + struct syscall_entry *entries; - if (syscall_stats == NULL) + entries = syscall__sort_stats(syscall_stats); + if (entries == NULL) return 0; printed += fprintf(fp, "\n"); - printed += fprintf(fp, " syscall calls total min avg max stddev\n"); - printed += fprintf(fp, " (msec) (msec) (msec) (msec) (%%)\n"); - printed += fprintf(fp, " --------------- -------- --------- --------- --------- --------- ------\n"); + printed += fprintf(fp, " syscall calls errors total min avg max stddev\n"); + printed += fprintf(fp, " (msec) (msec) (msec) (msec) (%%)\n"); + printed += fprintf(fp, " --------------- -------- ------ -------- --------- --------- --------- ------\n"); + + for (size_t i = 0; i < syscall_stats->sz; i++) { + struct syscall_entry *entry = &entries[i]; + struct syscall_stats *stats = entry->stats; - resort_rb__for_each_entry(nd, syscall_stats) { - struct stats *stats = syscall_stats_entry->stats; if (stats) { - double min = (double)(stats->min) / NSEC_PER_MSEC; - double max = (double)(stats->max) / NSEC_PER_MSEC; - double avg = avg_stats(stats); + double 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->n; + u64 n = (u64)stats->stats.n; - pct = avg ? 100.0 * stddev_stats(stats)/avg : 0.0; + pct = avg ? 100.0 * stddev_stats(&stats->stats) / avg : 0.0; avg /= NSEC_PER_MSEC; - sc = &trace->syscalls.table[syscall_stats_entry->syscall]; + sc = trace__syscall_info(trace, /*evsel=*/NULL, e_machine, entry->syscall); + if (!sc) + continue; + printed += fprintf(fp, " %-15s", sc->name); - printed += fprintf(fp, " %8" PRIu64 " %9.3f %9.3f %9.3f", - n, syscall_stats_entry->msecs, min, avg); + printed += fprintf(fp, " %8" PRIu64 " %6" PRIu64 " %9.3f %9.3f %9.3f", + n, stats->nr_failures, entry->msecs, min, avg); printed += fprintf(fp, " %9.3f %9.2f%%\n", max, pct); + + if (trace->errno_summary && stats->nr_failures) { + int e; + + for (e = 0; e < stats->max_errno; ++e) { + if (stats->errnos[e] != 0) + fprintf(fp, "\t\t\t\t%s: %d\n", perf_env__arch_strerrno(trace->host->env, e + 1), stats->errnos[e]); + } + } + lines++; } + + if (trace->max_summary && trace->max_summary <= lines) + break; } - resort_rb__delete(syscall_stats); + free(entries); printed += fprintf(fp, "\n\n"); return printed; } +static size_t thread__dump_stats(struct thread_trace *ttrace, + struct trace *trace, int e_machine, FILE *fp) +{ + return syscall__dump_stats(trace, e_machine, fp, ttrace->syscall_stats); +} + +static size_t system__dump_stats(struct trace *trace, int e_machine, FILE *fp) +{ + return syscall__dump_stats(trace, e_machine, fp, trace->syscall_stats); +} + 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); + int e_machine = thread__e_machine(thread, trace->host); double ratio; if (ttrace == NULL) @@ -3302,7 +4927,7 @@ static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trac ratio = (double)ttrace->nr_events / trace->nr_events * 100.0; - printed += fprintf(fp, " %s (%d), ", thread__comm_str(thread), thread->tid); + printed += fprintf(fp, " %s (%d), ", thread__comm_str(thread), thread__tid(thread)); printed += fprintf(fp, "%lu events, ", ttrace->nr_events); printed += fprintf(fp, "%.1f%%", ratio); if (ttrace->pfmaj) @@ -3314,7 +4939,7 @@ static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trac else if (fputc('\n', fp) != EOF) ++printed; - printed += thread__dump_stats(ttrace, trace, fp); + printed += thread__dump_stats(ttrace, trace, e_machine, fp); return printed; } @@ -3324,32 +4949,60 @@ 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; -) +static int trace_nr_events_cmp(void *priv __maybe_unused, + const struct list_head *la, + const struct list_head *lb) { - entry->thread = rb_entry(nd, struct thread, rb_node); + struct thread_list *a = list_entry(la, struct thread_list, list); + struct thread_list *b = list_entry(lb, struct thread_list, list); + unsigned long a_nr_events = thread__nr_events(thread__priv(a->thread)); + unsigned long b_nr_events = thread__nr_events(thread__priv(b->thread)); + + if (a_nr_events != b_nr_events) + return a_nr_events < b_nr_events ? -1 : 1; + + /* Identical number of threads, place smaller tids first. */ + return thread__tid(a->thread) < thread__tid(b->thread) + ? -1 + : (thread__tid(a->thread) > thread__tid(b->thread) ? 1 : 0); } 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); + size_t printed = trace__fprintf_summary_header(fp); + LIST_HEAD(threads); - if (threads == NULL) { - fprintf(fp, "%s", "Error sorting output by nr_events!\n"); - return 0; - } + if (machine__thread_list(trace->host, &threads) == 0) { + struct thread_list *pos; - resort_rb__for_each_entry(nd, threads) - printed += trace__fprintf_thread(fp, threads_entry->thread, trace); + list_sort(NULL, &threads, trace_nr_events_cmp); - resort_rb__delete(threads); + list_for_each_entry(pos, &threads, list) + printed += trace__fprintf_thread(fp, pos->thread, trace); } + thread_list__delete(&threads); + return printed; +} + +static size_t trace__fprintf_total_summary(struct trace *trace, FILE *fp) +{ + size_t printed = trace__fprintf_summary_header(fp); + + printed += fprintf(fp, " total, "); + printed += fprintf(fp, "%lu events", trace->nr_events); + + if (trace->pfmaj) + printed += fprintf(fp, ", %lu majfaults", trace->pfmaj); + if (trace->pfmin) + printed += fprintf(fp, ", %lu minfaults", trace->pfmin); + if (trace->sched) + printed += fprintf(fp, ", %.3f msec\n", trace->runtime_ms); + else if (fputc('\n', fp) != EOF) + ++printed; + + /* TODO: get all system e_machines. */ + printed += system__dump_stats(trace, EM_HOST, fp); + return printed; } @@ -3428,38 +5081,80 @@ static int parse_pagefaults(const struct option *opt, const char *str, return 0; } -static void evlist__set_evsel_handler(struct perf_evlist *evlist, void *handler) +static void evlist__set_default_evsel_handler(struct evlist *evlist, void *handler) { - struct perf_evsel *evsel; + struct evsel *evsel; - evlist__for_each_entry(evlist, evsel) - evsel->handler = handler; + evlist__for_each_entry(evlist, evsel) { + if (evsel->handler == NULL) + evsel->handler = handler; + } } -static int evlist__set_syscall_tp_fields(struct perf_evlist *evlist) +static void evsel__set_syscall_arg_fmt(struct evsel *evsel, const char *name) { - struct perf_evsel *evsel; + struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel); + + if (fmt) { + const struct syscall_fmt *scfmt = syscall_fmt__find(name); + + if (scfmt) { + const struct tep_event *tp_format = evsel__tp_format(evsel); + + if (tp_format) { + int skip = 0; + + if (strcmp(tp_format->format.fields->name, "__syscall_nr") == 0 || + strcmp(tp_format->format.fields->name, "nr") == 0) + ++skip; + + memcpy(fmt + skip, scfmt->arg, + (tp_format->format.nr_fields - skip) * sizeof(*fmt)); + } + } + } +} + +static int evlist__set_syscall_tp_fields(struct evlist *evlist, bool *use_btf) +{ + struct evsel *evsel; evlist__for_each_entry(evlist, evsel) { - if (evsel->priv || !evsel->tp_format) + const struct tep_event *tp_format; + + if (evsel->priv) continue; - if (strcmp(evsel->tp_format->system, "syscalls")) + tp_format = evsel__tp_format(evsel); + if (!tp_format) continue; - if (perf_evsel__init_syscall_tp(evsel)) + if (strcmp(tp_format->system, "syscalls")) { + evsel__init_tp_arg_scnprintf(evsel, use_btf); + continue; + } + + if (evsel__init_syscall_tp(evsel)) return -1; - if (!strncmp(evsel->tp_format->name, "sys_enter_", 10)) { - struct syscall_tp *sc = evsel->priv; + if (!strncmp(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; - } else if (!strncmp(evsel->tp_format->name, "sys_exit_", 9)) { - struct syscall_tp *sc = evsel->priv; - if (__tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap)) + evsel__set_syscall_arg_fmt(evsel, + tp_format->name + sizeof("sys_enter_") - 1); + } else if (!strncmp(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, + tp_format->name + sizeof("sys_exit_") - 1); } } @@ -3483,7 +5178,7 @@ static int trace__parse_events_option(const struct option *opt, const char *str, 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; + const struct syscall_fmt *fmt; if (strace_groups_dir == NULL) return -1; @@ -3498,8 +5193,9 @@ static int trace__parse_events_option(const struct option *opt, const char *str, *sep = '\0'; list = 0; - if (syscalltbl__id(trace->sctbl, s) >= 0 || - syscalltbl__strglobmatch_first(trace->sctbl, s, &idx) >= 0) { + /* TODO: support for more than just perf binary machine type syscalls. */ + if (syscalltbl__id(EM_HOST, s) >= 0 || + syscalltbl__strglobmatch_first(EM_HOST, s, &idx) >= 0) { list = 1; goto do_concat; } @@ -3549,12 +5245,18 @@ do_concat: err = 0; if (lists[0]) { - struct option o = OPT_CALLBACK('e', "event", &trace->evlist, "event", - "event selector. use 'perf list' to list available events", - parse_events_option); + struct parse_events_option_args parse_events_option_args = { + .evlistp = &trace->evlist, + }; + struct option o = { + .value = &parse_events_option_args, + }; err = parse_events_option(&o, lists[0], 0); } out: + free(strace_groups_dir); + free(lists[0]); + free(lists[1]); if (sep) *sep = ','; @@ -3565,36 +5267,34 @@ static int trace__parse_cgroups(const struct option *opt, const char *str, int u { struct trace *trace = opt->value; - if (!list_empty(&trace->evlist->entries)) - return parse_cgroups(opt, str, unset); - + 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 struct bpf_map *bpf__find_map_by_name(const char *name) +static int trace__parse_summary_mode(const struct option *opt, const char *str, + int unset __maybe_unused) { - struct bpf_object *obj, *tmp; - - bpf_object__for_each_safe(obj, tmp) { - struct bpf_map *map = bpf_object__find_map_by_name(obj, name); - if (map) - return map; + struct trace *trace = opt->value; + if (!strcmp(str, "thread")) { + trace->summary_mode = SUMMARY__BY_THREAD; + } else if (!strcmp(str, "total")) { + trace->summary_mode = SUMMARY__BY_TOTAL; + } else if (!strcmp(str, "cgroup")) { + trace->summary_mode = SUMMARY__BY_CGROUP; + } else { + pr_err("Unknown summary mode: %s\n", str); + return -1; } - return NULL; -} - -static void trace__set_bpf_map_filtered_pids(struct trace *trace) -{ - trace->filter_pids.map = bpf__find_map_by_name("pids_filtered"); -} - -static void trace__set_bpf_map_syscalls(struct trace *trace) -{ - trace->syscalls.map = bpf__find_map_by_name("syscalls"); + return 0; } static int trace__config(const char *var, const char *value, void *arg) @@ -3603,10 +5303,11 @@ static int trace__config(const char *var, const char *value, void *arg) int err = 0; if (!strcmp(var, "trace.add_events")) { - struct option o = OPT_CALLBACK('e', "event", &trace->evlist, "event", - "event selector. use 'perf list' to list available events", - parse_events_option); - err = parse_events_option(&o, value, 0); + 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")) { @@ -3630,11 +5331,36 @@ static int trace__config(const char *var, const char *value, void *arg) 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; } +static void trace__exit(struct trace *trace) +{ + thread__zput(trace->current); + strlist__delete(trace->ev_qualifier); + zfree(&trace->ev_qualifier_ids.entries); + if (trace->syscalls.table) { + for (size_t i = 0; i < trace->syscalls.table_size; i++) + syscall__delete(trace->syscalls.table[i]); + zfree(&trace->syscalls.table); + } + zfree(&trace->perfconfig_events); + evlist__delete(trace->evlist); + trace->evlist = NULL; + ordered_events__free(&trace->oe.data); +#ifdef HAVE_LIBBPF_SUPPORT + btf__free(trace->btf); + trace->btf = NULL; +#endif +} + int cmd_trace(int argc, const char **argv) { const char *trace_usage[] = { @@ -3645,12 +5371,8 @@ int cmd_trace(int argc, const char **argv) NULL }; struct trace trace = { - .syscalls = { - . max = -1, - }, .opts = { .target = { - .uid = UINT_MAX, .uses_mmap = true, }, .user_freq = UINT_MAX, @@ -3674,6 +5396,8 @@ int cmd_trace(int argc, const char **argv) 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"), @@ -3694,10 +5418,8 @@ int cmd_trace(int argc, const char **argv) 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"), + "number of mmap data pages", evlist__parse_mmap_pages), + OPT_STRING('u', "uid", &trace.uid_str, "user", "user to profile"), OPT_CALLBACK(0, "duration", &trace, "float", "show only events with duration > N.M ms", trace__set_duration), @@ -3711,6 +5433,11 @@ int cmd_trace(int argc, const char **argv) "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(0, "summary-mode", &trace, "mode", + "How to show summary: select thread (default), total or cgroup", + trace__parse_summary_mode), 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"), @@ -3718,6 +5445,8 @@ int cmd_trace(int argc, const char **argv) 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, @@ -3737,30 +5466,54 @@ int cmd_trace(int argc, const char **argv) "per thread proc mmap processing timeout in ms"), OPT_CALLBACK('G', "cgroup", &trace, "name", "monitor event in cgroup name only", trace__parse_cgroups), - OPT_UINTEGER('D', "delay", &trace.opts.initial_delay, + OPT_INTEGER('D', "delay", &trace.opts.target.initial_delay, "ms to wait before starting measurement after program " "start"), + OPT_BOOLEAN(0, "force-btf", &trace.force_btf, "Prefer btf_dump general pretty printer" + "to customized ones"), + OPT_BOOLEAN(0, "bpf-summary", &trace.summary_bpf, "Summary syscall stats in BPF"), + OPT_INTEGER(0, "max-summary", &trace.max_summary, + "Max number of entries in the summary."), + OPTS_EVSWITCH(&trace.evswitch), OPT_END() }; bool __maybe_unused max_stack_user_set = true; bool mmap_pages_user_set = true; - struct perf_evsel *evsel; + struct evsel *evsel; const char * const trace_subcommands[] = { "record", NULL }; int err = -1; char bf[BUFSIZ]; + struct sigaction sigchld_act; signal(SIGSEGV, sighandler_dump_stack); signal(SIGFPE, sighandler_dump_stack); + signal(SIGINT, sighandler_interrupt); + + memset(&sigchld_act, 0, sizeof(sigchld_act)); + sigchld_act.sa_flags = SA_SIGINFO; + sigchld_act.sa_sigaction = sighandler_chld; + sigaction(SIGCHLD, &sigchld_act, NULL); + + ordered_events__init(&trace.oe.data, ordered_events__deliver_event, &trace); + ordered_events__set_copy_on_queue(&trace.oe.data, true); - trace.evlist = perf_evlist__new(); - trace.sctbl = syscalltbl__new(); + trace.evlist = evlist__new(); - if (trace.evlist == NULL || trace.sctbl == NULL) { + if (trace.evlist == 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; @@ -3768,31 +5521,73 @@ int cmd_trace(int argc, const char **argv) 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; + + parse_events_error__init(&parse_err); + err = parse_events(trace.evlist, trace.perfconfig_events, &parse_err); + if (err) + parse_events_error__print(&parse_err, trace.perfconfig_events); + parse_events_error__exit(&parse_err); + if (err) + 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 (!trace.trace_syscalls) + goto skip_augmentation; - if (evsel) { - trace.syscalls.events.augmented = evsel; - trace__set_bpf_map_filtered_pids(&trace); - trace__set_bpf_map_syscalls(&trace); + if ((argc >= 1) && (strcmp(argv[0], "record") == 0)) { + pr_debug("Syscall augmentation fails with record, disabling augmentation"); + goto skip_augmentation; } - 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; + if (trace.summary_bpf) { + if (!trace.opts.target.system_wide) { + /* TODO: Add filters in the BPF to support other targets. */ + pr_err("Error: --bpf-summary only works for system-wide mode.\n"); + goto out; + } + if (trace.summary_only) + goto skip_augmentation; } + err = augmented_syscalls__prepare(); + if (err < 0) + goto skip_augmentation; + + trace__add_syscall_newtp(&trace); + + err = augmented_syscalls__create_bpf_output(trace.evlist); + if (err == 0) + trace.syscalls.events.bpf_output = evlist__last(trace.evlist); + +skip_augmentation: err = -1; if (trace.trace_pgfaults) { @@ -3821,17 +5616,17 @@ int cmd_trace(int argc, const char **argv) symbol_conf.use_callchain = true; } - if (trace.evlist->nr_entries > 0) { - evlist__set_evsel_handler(trace.evlist, trace__event_handler); - if (evlist__set_syscall_tp_fields(trace.evlist)) { + if (trace.evlist->core.nr_entries > 0) { + bool use_btf = false; + + evlist__set_default_evsel_handler(trace.evlist, trace__event_handler); + if (evlist__set_syscall_tp_fields(trace.evlist, &use_btf)) { 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 (use_btf) + trace__load_vmlinux_btf(&trace); } /* @@ -3845,29 +5640,45 @@ int cmd_trace(int argc, const char **argv) * buffers that are being copied from kernel to userspace, think 'read' * syscall. */ - if (trace.syscalls.events.augmented) { + if (trace.syscalls.events.bpf_output) { evlist__for_each_entry(trace.evlist, evsel) { - bool raw_syscalls_sys_exit = strcmp(perf_evsel__name(evsel), "raw_syscalls:sys_exit") == 0; + bool raw_syscalls_sys_exit = evsel__name_is(evsel, "raw_syscalls:sys_exit"); if (raw_syscalls_sys_exit) { trace.raw_augmented_syscalls = true; goto init_augmented_syscall_tp; } - if (strcmp(perf_evsel__name(evsel), "raw_syscalls:sys_enter") == 0) { - struct perf_evsel *augmented = trace.syscalls.events.augmented; - if (perf_evsel__init_augmented_syscall_tp(augmented, evsel) || - perf_evsel__init_augmented_syscall_tp_args(augmented)) + if (trace.syscalls.events.bpf_output->priv == NULL && + strstr(evsel__name(evsel), "syscalls:sys_enter")) { + struct evsel *augmented = trace.syscalls.events.bpf_output; + 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(perf_evsel__name(evsel), "syscalls:sys_exit_")) { + if (strstarts(evsel__name(evsel), "syscalls:sys_exit_")) { struct syscall_tp *sc; init_augmented_syscall_tp: - if (perf_evsel__init_augmented_syscall_tp(evsel, evsel)) + if (evsel__init_augmented_syscall_tp(evsel, evsel)) goto out; - sc = evsel->priv; + sc = __evsel__syscall_tp(evsel); /* * For now with BPF raw_augmented we hook into * raw_syscalls:sys_enter and there we get all @@ -3889,22 +5700,36 @@ init_augmented_syscall_tp: */ if (trace.raw_augmented_syscalls) trace.raw_augmented_syscalls_args_size = (6 + 1) * sizeof(long) + sc->id.offset; - perf_evsel__init_augmented_syscall_tp_ret(evsel); + evsel__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]); + if ((argc >= 1) && (strcmp(argv[0], "record") == 0)) { + err = trace__record(&trace, argc-1, &argv[1]); + goto out; + } + + /* 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 (!trace.trace_syscalls && !trace.trace_pgfaults && - trace.evlist->nr_entries == 0 /* Was --events used? */) { - trace.trace_syscalls = true; + /* Keep exited threads, otherwise information might be lost for summary */ + if (trace.summary) { + symbol_conf.keep_exited_threads = true; + if (trace.summary_mode == SUMMARY__NONE) + trace.summary_mode = SUMMARY__BY_THREAD; + + if (!trace.summary_bpf && trace.summary_mode == SUMMARY__BY_CGROUP) { + pr_err("Error: --summary-mode=cgroup only works with --bpf-summary\n"); + err = -EINVAL; + goto out; + } } if (output_name != NULL) { @@ -3915,6 +5740,10 @@ init_augmented_syscall_tp: } } + 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)); @@ -3922,11 +5751,19 @@ init_augmented_syscall_tp: 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 (trace.uid_str) { + uid_t uid = parse_uid(trace.uid_str); + + if (uid == UINT_MAX) { + ui__error("Invalid User: %s", trace.uid_str); + err = -EINVAL; + goto out_close; + } + err = parse_uid_filter(trace.evlist, uid); + if (err) + goto out_close; + + trace.opts.target.system_wide = true; } if (!argc && target__none(&trace.opts.target)) @@ -3941,5 +5778,7 @@ out_close: if (output_name != NULL) fclose(trace.output); out: + trace__exit(&trace); + augmented_syscalls__cleanup(); return err; } |