1 /* 2 * Copyright (c) Facebook, Inc. and its affiliates. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #pragma once 18 19 #if defined(__ELF__) && (defined(__x86_64__) || defined(__i386__)) && \ 20 !FOLLY_DISABLE_SDT 21 22 #include <folly/tracing/StaticTracepoint-ELFx86.h> 23 24 #define FOLLY_SDT(provider, name, ...) \ 25 FOLLY_SDT_PROBE_N( \ 26 provider, name, 0, FOLLY_SDT_NARG(0, ##__VA_ARGS__), ##__VA_ARGS__) 27 // Use FOLLY_SDT_DEFINE_SEMAPHORE(provider, name) to define the semaphore 28 // as global variable before using the FOLLY_SDT_WITH_SEMAPHORE macro 29 #define FOLLY_SDT_WITH_SEMAPHORE(provider, name, ...) \ 30 FOLLY_SDT_PROBE_N( \ 31 provider, name, 1, FOLLY_SDT_NARG(0, ##__VA_ARGS__), ##__VA_ARGS__) 32 #define FOLLY_SDT_IS_ENABLED(provider, name) \ 33 (FOLLY_SDT_SEMAPHORE(provider, name) > 0) 34 35 #else 36 37 #define FOLLY_SDT(provider, name, ...) \ 38 do { \ 39 } while (0) 40 #define FOLLY_SDT_WITH_SEMAPHORE(provider, name, ...) \ 41 do { \ 42 } while (0) 43 #define FOLLY_SDT_IS_ENABLED(provider, name) (false) 44 #define FOLLY_SDT_DEFINE_SEMAPHORE(provider, name) 45 #define FOLLY_SDT_DECLARE_SEMAPHORE(provider, name) 46 #endif 47