Trace.hpp

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// The Reactive C++ Toolbox.
// Copyright (C) 2021 Reactive Markets Limited
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
 
#ifndef TOOLBOX_SYS_TRACE_HPP
#define TOOLBOX_SYS_TRACE_HPP
 
#include <toolbox/util/Finally.hpp>
 
#include <toolbox/Config.h> // TOOLBOX_HAVE_SYSTEMTAP
 
#if TOOLBOX_HAVE_SYSTEMTAP
#ifndef SDT_USE_VARIADIC
#define SDT_USE_VARIADIC
#endif
#include <sys/sdt.h>
#define TOOLBOX_PROBE(provider, name, ...) STAP_PROBEV(provider, name, ##__VA_ARGS__)
// clang-format off
#if defined(__GNUC__) && !defined(__clang__)
#define TOOLBOX_PROBE_SCOPED(provider, name, ...)                       \
    STAP_PROBEV(provider, name ## _begin);                              \
    const auto __finally_ ## provider ## _ ## name = toolbox::util::make_finally([&]() noexcept __attribute__((noinline)) { \
        STAP_PROBEV(provider, name ## _end, ##__VA_ARGS__);             \
    })
#elif defined(__clang__)
#define TOOLBOX_PROBE_SCOPED(provider, name, ...)                       \
    STAP_PROBEV(provider, name ## _begin);                              \
    const auto __finally_ ## provider ## _ ## name = toolbox::util::make_finally([&]() __attribute__((noinline)) noexcept { \
        STAP_PROBEV(provider, name ## _end, ##__VA_ARGS__);             \
    })
#endif
// clang-format on
#else
#define TOOLBOX_PROBE(provider, name, ...)
#define TOOLBOX_PROBE_SCOPED(provider, name, ...)
#endif
 
#endif // TOOLBOX_SYS_TRACE_HPP