diff options
| -rw-r--r-- | tools/perf/builtin-trace.c | 106 | ||||
| -rwxr-xr-x | tools/perf/scripts/syscalltbl.sh | 36 | ||||
| -rw-r--r-- | tools/perf/util/syscalltbl.c | 113 | ||||
| -rw-r--r-- | tools/perf/util/syscalltbl.h | 22 |
4 files changed, 117 insertions, 160 deletions
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index bdfd3d5128b7..3017291242cf 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -149,7 +149,6 @@ enum summary_mode { struct trace { struct perf_tool tool; - struct syscalltbl *sctbl; struct { /** Sorted sycall numbers used by the trace. */ struct syscall *table; @@ -188,6 +187,14 @@ 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; @@ -2141,7 +2148,7 @@ static int syscall__read_info(struct syscall *sc, struct trace *trace) return 0; } - name = syscalltbl__name(trace->sctbl, sc->id); + name = syscalltbl__name(sc->e_machine, sc->id); if (name == NULL) { sc->nonexistent = true; return -EEXIST; @@ -2241,10 +2248,14 @@ static int trace__validate_ev_qualifier(struct trace *trace) 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; @@ -2264,7 +2275,7 @@ matches: 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 == nr_used) { @@ -2722,6 +2733,7 @@ static int trace__sys_enter(struct trace *trace, struct evsel *evsel, int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1; int augmented_args_size = 0; void *augmented_args = NULL; + /* TODO: get e_machine from thread. */ struct syscall *sc = trace__syscall_info(trace, evsel, EM_HOST, id); struct thread_trace *ttrace; @@ -2796,6 +2808,7 @@ static int trace__fprintf_sys_enter(struct trace *trace, struct evsel *evsel, struct thread_trace *ttrace; struct thread *thread; int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1; + /* TODO: get e_machine from thread. */ struct syscall *sc = trace__syscall_info(trace, evsel, EM_HOST, id); char msg[1024]; void *args, *augmented_args = NULL; @@ -2871,6 +2884,7 @@ static int trace__sys_exit(struct trace *trace, struct evsel *evsel, 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; + /* TODO: get e_machine from thread. */ struct syscall *sc = trace__syscall_info(trace, evsel, EM_HOST, id); struct thread_trace *ttrace; @@ -3224,6 +3238,7 @@ static int trace__event_handler(struct trace *trace, struct evsel *evsel, if (evsel == trace->syscalls.events.bpf_output) { int id = perf_evsel__sc_tp_uint(evsel, id, sample); + /* TODO: get e_machine from thread. */ struct syscall *sc = trace__syscall_info(trace, evsel, EM_HOST, id); if (sc) { @@ -3731,9 +3746,9 @@ out_unaugmented: return trace->skel->progs.syscall_unaugmented; } -static void trace__init_syscall_bpf_progs(struct trace *trace, int id) +static void trace__init_syscall_bpf_progs(struct trace *trace, int e_machine, int id) { - struct syscall *sc = trace__syscall_info(trace, NULL, EM_HOST, id); + struct syscall *sc = trace__syscall_info(trace, NULL, e_machine, id); if (sc == NULL) return; @@ -3742,22 +3757,22 @@ static void trace__init_syscall_bpf_progs(struct trace *trace, int id) sc->bpf_prog.sys_exit = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_exit : NULL, "exit"); } -static int trace__bpf_prog_sys_enter_fd(struct trace *trace, int id) +static int trace__bpf_prog_sys_enter_fd(struct trace *trace, int e_machine, int id) { - struct syscall *sc = trace__syscall_info(trace, NULL, EM_HOST, id); + struct syscall *sc = trace__syscall_info(trace, NULL, e_machine, id); return sc ? bpf_program__fd(sc->bpf_prog.sys_enter) : bpf_program__fd(trace->skel->progs.syscall_unaugmented); } -static int trace__bpf_prog_sys_exit_fd(struct trace *trace, int id) +static int trace__bpf_prog_sys_exit_fd(struct trace *trace, int e_machine, int id) { - struct syscall *sc = trace__syscall_info(trace, NULL, EM_HOST, id); + struct syscall *sc = trace__syscall_info(trace, NULL, e_machine, id); return sc ? bpf_program__fd(sc->bpf_prog.sys_exit) : bpf_program__fd(trace->skel->progs.syscall_unaugmented); } -static int trace__bpf_sys_enter_beauty_map(struct trace *trace, int key, unsigned int *beauty_array) +static int trace__bpf_sys_enter_beauty_map(struct trace *trace, int e_machine, int key, unsigned int *beauty_array) { struct tep_format_field *field; - struct syscall *sc = trace__syscall_info(trace, NULL, EM_HOST, key); + 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; @@ -3854,8 +3869,8 @@ static struct bpf_program *trace__find_usable_bpf_prog_entry(struct trace *trace return NULL; try_to_find_pair: - for (int i = 0; i < trace->sctbl->syscalls.nr_entries; ++i) { - int id = syscalltbl__id_at_idx(trace->sctbl, i); + 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); /* calling trace__syscall_info() may invalidate '_sc' */ struct syscall *pair = trace__syscall_info(trace, NULL, sc.e_machine, id); struct bpf_program *pair_prog; @@ -3941,7 +3956,7 @@ try_to_find_pair: return NULL; } -static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace) +static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace, int e_machine) { int map_enter_fd = bpf_map__fd(trace->skel->maps.syscalls_sys_enter); int map_exit_fd = bpf_map__fd(trace->skel->maps.syscalls_sys_exit); @@ -3949,27 +3964,27 @@ static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace) int err = 0; unsigned int beauty_array[6]; - for (int i = 0; i < trace->sctbl->syscalls.nr_entries; ++i) { - int prog_fd, key = syscalltbl__id_at_idx(trace->sctbl, i); + 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; - trace__init_syscall_bpf_progs(trace, key); + 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, key); + 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, key); + 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, key, (unsigned int *)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); @@ -4005,9 +4020,9 @@ static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace) * 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; i < trace->sctbl->syscalls.nr_entries; ++i) { - int key = syscalltbl__id_at_idx(trace->sctbl, i); - struct syscall *sc = trace__syscall_info(trace, NULL, EM_HOST, key); + 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; @@ -4032,7 +4047,7 @@ static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace) * Get syscall info again as find usable entry above might * modify the syscall table and shuffle it. */ - sc = trace__syscall_info(trace, NULL, EM_HOST, key); + sc = trace__syscall_info(trace, NULL, e_machine, key); sc->bpf_prog.sys_enter = pair_prog; /* @@ -4457,8 +4472,13 @@ static int trace__run(struct trace *trace, int argc, const char **argv) goto out_error_mem; #ifdef HAVE_BPF_SKEL - if (trace->skel && trace->skel->progs.sys_enter) - trace__init_syscalls_bpf_prog_array_maps(trace); + if (trace->skel && trace->skel->progs.sys_enter) { + /* + * 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); + } #endif if (trace->ev_qualifier_ids.nr > 0) { @@ -4483,7 +4503,8 @@ static int trace__run(struct trace *trace, int argc, const char **argv) * So just disable this beautifier (SCA_FD, SCA_FDAT) when 'close' is * not in use. */ - trace->fd_path_disabled = !trace__syscall_enabled(trace, syscalltbl__id(trace->sctbl, "close")); + /* 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) @@ -4796,7 +4817,7 @@ static struct syscall_entry *syscall__sort_stats(struct hashmap *syscall_stats) return entry; } -static size_t syscall__dump_stats(struct trace *trace, FILE *fp, +static size_t syscall__dump_stats(struct trace *trace, int e_machine, FILE *fp, struct hashmap *syscall_stats) { size_t printed = 0; @@ -4827,7 +4848,7 @@ static size_t syscall__dump_stats(struct trace *trace, FILE *fp, pct = avg ? 100.0 * stddev_stats(&stats->stats) / avg : 0.0; avg /= NSEC_PER_MSEC; - sc = trace__syscall_info(trace, /*evsel=*/NULL, EM_HOST, entry->syscall); + sc = trace__syscall_info(trace, /*evsel=*/NULL, e_machine, entry->syscall); if (!sc) continue; @@ -4854,14 +4875,14 @@ static size_t syscall__dump_stats(struct trace *trace, FILE *fp, } static size_t thread__dump_stats(struct thread_trace *ttrace, - struct trace *trace, FILE *fp) + struct trace *trace, int e_machine, FILE *fp) { - return syscall__dump_stats(trace, fp, ttrace->syscall_stats); + return syscall__dump_stats(trace, e_machine, fp, ttrace->syscall_stats); } -static size_t system__dump_stats(struct trace *trace, FILE *fp) +static size_t system__dump_stats(struct trace *trace, int e_machine, FILE *fp) { - return syscall__dump_stats(trace, fp, trace->syscall_stats); + 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) @@ -4887,7 +4908,8 @@ 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); + /* TODO: get e_machine from thread. */ + printed += thread__dump_stats(ttrace, trace, EM_HOST, fp); return printed; } @@ -4948,7 +4970,8 @@ static size_t trace__fprintf_total_summary(struct trace *trace, FILE *fp) else if (fputc('\n', fp) != EOF) ++printed; - printed += system__dump_stats(trace, fp); + /* TODO: get all system e_machines. */ + printed += system__dump_stats(trace, EM_HOST, fp); return printed; } @@ -5140,8 +5163,9 @@ 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; } @@ -5294,7 +5318,6 @@ static void trace__exit(struct trace *trace) syscall__exit(&trace->syscalls.table[i]); zfree(&trace->syscalls.table); } - syscalltbl__delete(trace->sctbl); zfree(&trace->perfconfig_events); } @@ -5443,9 +5466,8 @@ int cmd_trace(int argc, const char **argv) sigaction(SIGCHLD, &sigchld_act, NULL); trace.evlist = evlist__new(); - trace.sctbl = syscalltbl__new(); - if (trace.evlist == NULL || trace.sctbl == NULL) { + if (trace.evlist == NULL) { pr_err("Not enough memory to run!\n"); err = -ENOMEM; goto out; diff --git a/tools/perf/scripts/syscalltbl.sh b/tools/perf/scripts/syscalltbl.sh index 1ce0d5aa8b50..a39b3013b103 100755 --- a/tools/perf/scripts/syscalltbl.sh +++ b/tools/perf/scripts/syscalltbl.sh @@ -50,37 +50,27 @@ fi infile="$1" outfile="$2" -nxt=0 - -syscall_macro() { - nr="$1" - name="$2" - - echo " [$nr] = \"$name\"," -} - -emit() { - nr="$1" - entry="$2" - - syscall_macro "$nr" "$entry" -} - -echo "static const char *const syscalltbl[] = {" > $outfile - sorted_table=$(mktemp /tmp/syscalltbl.XXXXXX) grep -E "^[0-9]+[[:space:]]+$abis" "$infile" | sort -n > $sorted_table -max_nr=0 +echo "static const char *const syscall_num_to_name[] = {" > $outfile # the params are: nr abi name entry compat # use _ for intentionally unused variables according to SC2034 while read nr _ name _ _; do - emit "$nr" "$name" >> $outfile - max_nr=$nr + echo " [$nr] = \"$name\"," >> $outfile done < $sorted_table +echo "};" >> $outfile -rm -f $sorted_table +echo "static const uint16_t syscall_sorted_names[] = {" >> $outfile +# When sorting by name, add a suffix of 0s upto 20 characters so that system +# calls that differ with a numerical suffix don't sort before those +# without. This default behavior of sort differs from that of strcmp used at +# runtime. Use sed to strip the trailing 0s suffix afterwards. +grep -E "^[0-9]+[[:space:]]+$abis" "$infile" | awk '{printf $3; for (i = length($3); i < 20; i++) { printf "0"; }; print " " $1}'| sort | sed 's/\([a-zA-Z1-9]\+\)0\+ \([0-9]\+\)/\1 \2/' > $sorted_table +while read name nr; do + echo " $nr, /* $name */" >> $outfile +done < $sorted_table echo "};" >> $outfile -echo "#define SYSCALLTBL_MAX_ID ${max_nr}" >> $outfile +rm -f $sorted_table diff --git a/tools/perf/util/syscalltbl.c b/tools/perf/util/syscalltbl.c index 2f76241494c8..760ac4d0869f 100644 --- a/tools/perf/util/syscalltbl.c +++ b/tools/perf/util/syscalltbl.c @@ -9,6 +9,7 @@ #include <stdlib.h> #include <asm/bitsperlong.h> #include <linux/compiler.h> +#include <linux/kernel.h> #include <linux/zalloc.h> #include <string.h> @@ -20,112 +21,66 @@ #include <asm/syscalls_32.h> #endif -const int syscalltbl_native_max_id = SYSCALLTBL_MAX_ID; -static const char *const *syscalltbl_native = syscalltbl; +const char *syscalltbl__name(int e_machine __maybe_unused, int id) +{ + if (id >= 0 && id <= (int)ARRAY_SIZE(syscall_num_to_name)) + return syscall_num_to_name[id]; + return NULL; +} -struct syscall { - int id; +struct syscall_cmp_key { const char *name; + const char *const *tbl; }; static int syscallcmpname(const void *vkey, const void *ventry) { - const char *key = vkey; - const struct syscall *entry = ventry; + const struct syscall_cmp_key *key = vkey; + const uint16_t *entry = ventry; - return strcmp(key, entry->name); + return strcmp(key->name, key->tbl[*entry]); } -static int syscallcmp(const void *va, const void *vb) +int syscalltbl__id(int e_machine __maybe_unused, const char *name) { - const struct syscall *a = va, *b = vb; - - return strcmp(a->name, b->name); + struct syscall_cmp_key key = { + .name = name, + .tbl = syscall_num_to_name, + }; + const int *id = bsearch(&key, syscall_sorted_names, + ARRAY_SIZE(syscall_sorted_names), + sizeof(syscall_sorted_names[0]), + syscallcmpname); + + return id ? *id : -1; } -static int syscalltbl__init_native(struct syscalltbl *tbl) +int syscalltbl__num_idx(int e_machine __maybe_unused) { - int nr_entries = 0, i, j; - struct syscall *entries; - - for (i = 0; i <= syscalltbl_native_max_id; ++i) - if (syscalltbl_native[i]) - ++nr_entries; - - entries = tbl->syscalls.entries = malloc(sizeof(struct syscall) * nr_entries); - if (tbl->syscalls.entries == NULL) - return -1; - - for (i = 0, j = 0; i <= syscalltbl_native_max_id; ++i) { - if (syscalltbl_native[i]) { - entries[j].name = syscalltbl_native[i]; - entries[j].id = i; - ++j; - } - } - - qsort(tbl->syscalls.entries, nr_entries, sizeof(struct syscall), syscallcmp); - tbl->syscalls.nr_entries = nr_entries; - tbl->syscalls.max_id = syscalltbl_native_max_id; - return 0; + return ARRAY_SIZE(syscall_sorted_names); } -struct syscalltbl *syscalltbl__new(void) +int syscalltbl__id_at_idx(int e_machine __maybe_unused, int idx) { - struct syscalltbl *tbl = malloc(sizeof(*tbl)); - if (tbl) { - if (syscalltbl__init_native(tbl)) { - free(tbl); - return NULL; - } - } - return tbl; -} - -void syscalltbl__delete(struct syscalltbl *tbl) -{ - zfree(&tbl->syscalls.entries); - free(tbl); -} - -const char *syscalltbl__name(const struct syscalltbl *tbl __maybe_unused, int id) -{ - return id <= syscalltbl_native_max_id ? syscalltbl_native[id]: NULL; -} - -int syscalltbl__id(struct syscalltbl *tbl, const char *name) -{ - struct syscall *sc = bsearch(name, tbl->syscalls.entries, - tbl->syscalls.nr_entries, sizeof(*sc), - syscallcmpname); - - return sc ? sc->id : -1; -} - -int syscalltbl__id_at_idx(struct syscalltbl *tbl, int idx) -{ - struct syscall *syscalls = tbl->syscalls.entries; - - return idx < tbl->syscalls.nr_entries ? syscalls[idx].id : -1; + return syscall_sorted_names[idx]; } -int syscalltbl__strglobmatch_next(struct syscalltbl *tbl, const char *syscall_glob, int *idx) +int syscalltbl__strglobmatch_next(int e_machine __maybe_unused, const char *syscall_glob, int *idx) { - int i; - struct syscall *syscalls = tbl->syscalls.entries; + for (int i = *idx + 1; i < (int)ARRAY_SIZE(syscall_sorted_names); ++i) { + const char *name = syscall_num_to_name[syscall_sorted_names[i]]; - for (i = *idx + 1; i < tbl->syscalls.nr_entries; ++i) { - if (strglobmatch(syscalls[i].name, syscall_glob)) { + if (strglobmatch(name, syscall_glob)) { *idx = i; - return syscalls[i].id; + return syscall_sorted_names[i]; } } return -1; } -int syscalltbl__strglobmatch_first(struct syscalltbl *tbl, const char *syscall_glob, int *idx) +int syscalltbl__strglobmatch_first(int e_machine, const char *syscall_glob, int *idx) { *idx = -1; - return syscalltbl__strglobmatch_next(tbl, syscall_glob, idx); + return syscalltbl__strglobmatch_next(e_machine, syscall_glob, idx); } diff --git a/tools/perf/util/syscalltbl.h b/tools/perf/util/syscalltbl.h index 362411a6d849..2bb628eff367 100644 --- a/tools/perf/util/syscalltbl.h +++ b/tools/perf/util/syscalltbl.h @@ -2,22 +2,12 @@ #ifndef __PERF_SYSCALLTBL_H #define __PERF_SYSCALLTBL_H -struct syscalltbl { - struct { - int max_id; - int nr_entries; - void *entries; - } syscalls; -}; +const char *syscalltbl__name(int e_machine, int id); +int syscalltbl__id(int e_machine, const char *name); +int syscalltbl__num_idx(int e_machine); +int syscalltbl__id_at_idx(int e_machine, int idx); -struct syscalltbl *syscalltbl__new(void); -void syscalltbl__delete(struct syscalltbl *tbl); - -const char *syscalltbl__name(const struct syscalltbl *tbl, int id); -int syscalltbl__id(struct syscalltbl *tbl, const char *name); -int syscalltbl__id_at_idx(struct syscalltbl *tbl, int idx); - -int syscalltbl__strglobmatch_first(struct syscalltbl *tbl, const char *syscall_glob, int *idx); -int syscalltbl__strglobmatch_next(struct syscalltbl *tbl, const char *syscall_glob, int *idx); +int syscalltbl__strglobmatch_first(int e_machine, const char *syscall_glob, int *idx); +int syscalltbl__strglobmatch_next(int e_machine, const char *syscall_glob, int *idx); #endif /* __PERF_SYSCALLTBL_H */ |