diff --git a/tools/lib/traceevent/plugins/Build b/tools/lib/traceevent/plugins/Build index b866f231a536..dd4da823c38f 100644 --- a/tools/lib/traceevent/plugins/Build +++ b/tools/lib/traceevent/plugins/Build @@ -5,6 +5,7 @@ plugin_kvm-y += plugin_kvm.o plugin_mac80211-y += plugin_mac80211.o plugin_sched_switch-y += plugin_sched_switch.o plugin_function-y += plugin_function.o +plugin_futex-y += plugin_futex.o plugin_xen-y += plugin_xen.o plugin_scsi-y += plugin_scsi.o plugin_cfg80211-y += plugin_cfg80211.o diff --git a/tools/lib/traceevent/plugins/Makefile b/tools/lib/traceevent/plugins/Makefile index 8e72707e8630..946a4d31fcaf 100644 --- a/tools/lib/traceevent/plugins/Makefile +++ b/tools/lib/traceevent/plugins/Makefile @@ -134,6 +134,7 @@ PLUGINS += plugin_kvm.so PLUGINS += plugin_mac80211.so PLUGINS += plugin_sched_switch.so PLUGINS += plugin_function.so +PLUGINS += plugin_futex.so PLUGINS += plugin_xen.so PLUGINS += plugin_scsi.so PLUGINS += plugin_cfg80211.so diff --git a/tools/lib/traceevent/plugins/plugin_futex.c b/tools/lib/traceevent/plugins/plugin_futex.c new file mode 100644 index 000000000000..5d76df141401 --- /dev/null +++ b/tools/lib/traceevent/plugins/plugin_futex.c @@ -0,0 +1,137 @@ +/* + * Copyright (C) 2017 National Instruments Corp. + * + * Author: Julia Cartwright + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; + * version 2.1 of the License (not later!) + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this program; if not, see + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + */ +#include +#include +#include +#include + +#include "event-parse.h" + +#define ARRAY_SIZE(_a) (sizeof(_a) / sizeof((_a)[0])) + +struct futex_args { + unsigned long long uaddr; + unsigned long long op; + unsigned long long val; + unsigned long long utime; /* or val2 */ + unsigned long long uaddr2; + unsigned long long val3; +}; + +struct futex_op { + const char *name; + const char *fmt_val; + const char *fmt_utime; + const char *fmt_uaddr2; + const char *fmt_val3; +}; + +static const struct futex_op futex_op_tbl[] = { + { "FUTEX_WAIT", " val=0x%08llx", " utime=0x%08llx", NULL, NULL }, + { "FUTEX_WAKE", " val=%llu", NULL, NULL, NULL }, + { "FUTEX_FD", " val=%llu", NULL, NULL, NULL }, + { "FUTEX_REQUEUE", " val=%llu", " val2=%llu", " uaddr2=0x%08llx", NULL }, + { "FUTEX_CMP_REQUEUE", " val=%llu", " val2=%llu", " uaddr2=0x%08llx", " val3=0x%08llx" }, + { "FUTEX_WAKE_OP", " val=%llu", " val2=%llu", " uaddr2=0x%08llx", " val3=0x%08llx" }, + { "FUTEX_LOCK_PI", NULL, " utime=0x%08llx", NULL, NULL }, + { "FUTEX_UNLOCK_PI", NULL, NULL, NULL, NULL }, + { "FUTEX_TRYLOCK_PI", NULL, NULL, NULL, NULL }, + { "FUTEX_WAIT_BITSET", " val=0x%08llx", " utime=0x%08llx", NULL, " val3=0x%08llx" }, + { "FUTEX_WAKE_BITSET", " val=%llu", NULL, NULL, " val3=0x%08llx" }, + { "FUTEX_WAIT_REQUEUE_PI", " val=0x%08llx", " utime=0x%08llx", " uaddr2=0x%08llx", " val3=0x%08llx" }, + { "FUTEX_CMP_REQUEUE_PI", " val=%llu", " val2=%llu", " uaddr2=0x%08llx", " val3=0x%08llx" }, +}; + + +static void futex_print(struct trace_seq *s, const struct futex_args *args, + const struct futex_op *fop) +{ + trace_seq_printf(s, " uaddr=0x%08llx", args->uaddr); + + if (fop->fmt_val) + trace_seq_printf(s, fop->fmt_val, args->val); + + if (fop->fmt_utime) + trace_seq_printf(s,fop->fmt_utime, args->utime); + + if (fop->fmt_uaddr2) + trace_seq_printf(s, fop->fmt_uaddr2, args->uaddr2); + + if (fop->fmt_val3) + trace_seq_printf(s, fop->fmt_val3, args->val3); +} + +static int futex_handler(struct trace_seq *s, struct tep_record *record, + struct tep_event *event, void *context) +{ + const struct futex_op *fop; + struct futex_args args; + unsigned long long cmd; + + if (tep_get_field_val(s, event, "uaddr", record, &args.uaddr, 1)) + return 1; + + if (tep_get_field_val(s, event, "op", record, &args.op, 1)) + return 1; + + if (tep_get_field_val(s, event, "val", record, &args.val, 1)) + return 1; + + if (tep_get_field_val(s, event, "utime", record, &args.utime, 1)) + return 1; + + if (tep_get_field_val(s, event, "uaddr2", record, &args.uaddr2, 1)) + return 1; + + if (tep_get_field_val(s, event, "val3", record, &args.val3, 1)) + return 1; + + cmd = args.op & FUTEX_CMD_MASK; + if (cmd >= ARRAY_SIZE(futex_op_tbl)) + return 1; + + fop = &futex_op_tbl[cmd]; + + trace_seq_printf(s, "op=%s", fop->name); + + if (args.op & FUTEX_PRIVATE_FLAG) + trace_seq_puts(s, "|FUTEX_PRIVATE_FLAG"); + + if (args.op & FUTEX_CLOCK_REALTIME) + trace_seq_puts(s, "|FUTEX_CLOCK_REALTIME"); + + futex_print(s, &args, fop); + return 0; +} + +int TEP_PLUGIN_LOADER(struct tep_handle *tep) +{ + tep_register_event_handler(tep, -1, "syscalls", "sys_enter_futex", + futex_handler, NULL); + return 0; +} + +void TEP_PLUGIN_UNLOADER(struct tep_handle *tep) +{ + tep_unregister_event_handler(tep, -1, "syscalls", "sys_enter_futex", + futex_handler, NULL); +}