From fd0db10268b3729eb466fd726a39ce7d800bb150 Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Mon, 4 Apr 2016 13:32:20 -0300 Subject: [PATCH] perf trace: Move syscall table id <-> name routines to separate class We're using libaudit for doing name to id and id to syscall name translations, but that makes 'perf trace' to have to wait for newer libaudit versions supporting recently added syscalls, such as "userfaultfd" at the time of this changeset. We have all the information right there, in the kernel sources, so move this code to a separate place, wrapped behind functions that will progressively use the kernel source files to extract the syscall table for use in 'perf trace'. Cc: Adrian Hunter Cc: David Ahern Cc: Jiri Olsa Cc: Namhyung Kim Cc: Wang Nan Link: http://lkml.kernel.org/n/tip-i38opd09ow25mmyrvfwnbvkj@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-trace.c | 24 +++++++++++------------- tools/perf/util/Build | 1 + tools/perf/util/syscalltbl.c | 43 +++++++++++++++++++++++++++++++++++++++++++ tools/perf/util/syscalltbl.h | 16 ++++++++++++++++ 4 files changed, 71 insertions(+), 13 deletions(-) create mode 100644 tools/perf/util/syscalltbl.c create mode 100644 tools/perf/util/syscalltbl.h diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index 8440e2b..11290b5 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -34,8 +34,9 @@ #include "trace-event.h" #include "util/parse-events.h" #include "util/bpf-loader.h" +#include "syscalltbl.h" -#include +#include /* FIXME: Still needed for audit_errno_to_name */ #include #include #include @@ -114,10 +115,7 @@ struct trace { struct perf_tool tool; - struct { - int machine; - int open_id; - } audit; + struct syscalltbl *sctbl; struct { int max; struct syscall *table; @@ -163,6 +161,7 @@ struct trace { bool force; bool vfs_getname; int trace_pgfaults; + int open_id; }; struct tp_field { @@ -1780,7 +1779,7 @@ static int trace__read_syscall_info(struct trace *trace, int id) { char tp_name[128]; struct syscall *sc; - const char *name = audit_syscall_to_name(id, trace->audit.machine); + const char *name = syscalltbl__name(trace->sctbl, id); if (name == NULL) return -1; @@ -1855,7 +1854,7 @@ static int trace__validate_ev_qualifier(struct trace *trace) strlist__for_each(pos, trace->ev_qualifier) { const char *sc = pos->s; - int id = audit_name_to_syscall(sc, trace->audit.machine); + int id = syscalltbl__id(trace->sctbl, sc); if (id < 0) { if (err == 0) { @@ -2137,7 +2136,7 @@ static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel, ret = perf_evsel__sc_tp_uint(evsel, ret, sample); - if (id == trace->audit.open_id && ret >= 0 && ttrace->filename.pending_open) { + if (id == trace->open_id && ret >= 0 && ttrace->filename.pending_open) { trace__set_fd_pathname(thread, ret, ttrace->filename.name); ttrace->filename.pending_open = false; ++trace->stats.vfs_getname; @@ -3189,10 +3188,6 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused) NULL }; struct trace trace = { - .audit = { - .machine = audit_detect_machine(), - .open_id = audit_name_to_syscall("open", trace.audit.machine), - }, .syscalls = { . max = -1, }, @@ -3267,8 +3262,9 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused) signal(SIGFPE, sighandler_dump_stack); trace.evlist = perf_evlist__new(); + trace.sctbl = syscalltbl__new(); - if (trace.evlist == NULL) { + if (trace.evlist == NULL || trace.sctbl == NULL) { pr_err("Not enough memory to run!\n"); err = -ENOMEM; goto out; @@ -3306,6 +3302,8 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused) } } + trace.open_id = syscalltbl__id(trace.sctbl, "open"); + if (ev_qualifier_str != NULL) { const char *s = ev_qualifier_str; struct strlist_config slist_config = { diff --git a/tools/perf/util/Build b/tools/perf/util/Build index 85ceff3..3443646 100644 --- a/tools/perf/util/Build +++ b/tools/perf/util/Build @@ -38,6 +38,7 @@ libperf-y += machine.o libperf-y += map.o libperf-y += pstack.o libperf-y += session.o +libperf-$(CONFIG_AUDIT) += syscalltbl.o libperf-y += ordered-events.o libperf-y += comm.o libperf-y += thread.o diff --git a/tools/perf/util/syscalltbl.c b/tools/perf/util/syscalltbl.c new file mode 100644 index 0000000..1f13e57 --- /dev/null +++ b/tools/perf/util/syscalltbl.c @@ -0,0 +1,43 @@ +/* + * System call table mapper + * + * (C) 2016 Arnaldo Carvalho de Melo + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + */ + +#include "syscalltbl.h" +#include +#include + + +struct syscalltbl *syscalltbl__new(void) +{ + struct syscalltbl *tbl = malloc(sizeof(*tbl)); + if (tbl) { + tbl->audit_machine = audit_detect_machine(); + } + return tbl; +} + +void syscalltbl__delete(struct syscalltbl *tbl) +{ + free(tbl); +} + +const char *syscalltbl__name(const struct syscalltbl *tbl, int id) +{ + return audit_syscall_to_name(id, tbl->audit_machine); +} + +int syscalltbl__id(struct syscalltbl *tbl, const char *name) +{ + return audit_name_to_syscall(name, tbl->audit_machine); +} diff --git a/tools/perf/util/syscalltbl.h b/tools/perf/util/syscalltbl.h new file mode 100644 index 0000000..9dee73c --- /dev/null +++ b/tools/perf/util/syscalltbl.h @@ -0,0 +1,16 @@ +#ifndef __PERF_SYSCALLTBL_H +#define __PERF_SYSCALLTBL_H + +struct syscalltbl { + union { + int audit_machine; + }; +}; + +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); + +#endif /* __PERF_SYSCALLTBL_H */ -- 2.7.4