75 lines
2.1 KiB
C++
75 lines
2.1 KiB
C++
// Copyright (C) 2019 The Android Open Source Project
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// Copyright (C) 2019 Google Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#pragma once
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// Library to perform tracing. Talks to platform-specific
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// tracing libraries.
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namespace android {
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namespace base {
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#ifdef HOST_BUILD
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void initializeTracing();
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void enableTracing();
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void disableTracing();
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// Some platform tracing libraries such as Perfetto can be enabled/disabled at
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// runtime. Allow the user to query if they are disabled or not, and take
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// further action based on it. The use case is to enable/disable tracing on the
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// host alongside.
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bool isTracingEnabled();
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class ScopedTrace {
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public:
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ScopedTrace(const char* name);
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~ScopedTrace();
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};
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class ScopedTraceDerived : public ScopedTrace {
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public:
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void* member = nullptr;
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};
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#endif
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bool isTracingEnabled();
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class ScopedTraceGuest {
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public:
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ScopedTraceGuest(const char* name) : name_(name) {
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beginTraceImpl(name_);
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}
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~ScopedTraceGuest() {
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endTraceImpl(name_);
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}
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private:
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void beginTraceImpl(const char* name);
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void endTraceImpl(const char* name);
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const char* const name_;
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};
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} // namespace base
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} // namespace android
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#define __AEMU_GENSYM2(x,y) x##y
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#define __AEMU_GENSYM1(x,y) __AEMU_GENSYM2(x,y)
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#define AEMU_GENSYM(x) __AEMU_GENSYM1(x,__COUNTER__)
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#ifdef HOST_BUILD
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#define AEMU_SCOPED_TRACE(tag) __attribute__ ((unused)) android::base::ScopedTrace AEMU_GENSYM(aemuScopedTrace_)(tag)
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#else
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#define AEMU_SCOPED_TRACE(tag) __attribute__ ((unused)) android::base::ScopedTraceGuest AEMU_GENSYM(aemuScopedTrace_)(tag)
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#endif
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