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62 lines
2.2 KiB
62 lines
2.2 KiB
4 months ago
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/*
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* Copyright (C) 2011 The Android Open Source Project
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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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*/
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#ifndef ART_LIBARTBASE_BASE_RUNTIME_DEBUG_H_
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#define ART_LIBARTBASE_BASE_RUNTIME_DEBUG_H_
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namespace art {
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// Runtime debug flags are flags that have a runtime component, that is, their value can be changed.
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// This is meant to implement fast vs slow debug builds, in that certain debug flags can be turned
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// on and off. To that effect, expose two macros to help implement and globally drive these flags:
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//
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// In the header, declare a (class) flag like this:
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//
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// class C {
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// DECLARE_RUNTIME_DEBUG_FLAG(kFlag);
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// };
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//
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// This will declare a flag kFlag that is a constexpr false in release builds, and a static field
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// in debug builds. Usage is than uniform as C::kFlag.
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//
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// In the cc file, define the flag like this:
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//
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// DEFINE_RUNTIME_DEBUG_FLAG(C, kFlag);
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//
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// This will define the static storage, as necessary, and register the flag with the runtime
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// infrastructure to toggle the value.
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#ifdef NDEBUG
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#define DECLARE_RUNTIME_DEBUG_FLAG(x) \
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static constexpr bool x = false;
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// Note: the static_assert in the following only works for public flags. Fix this when we cross
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// the line at some point.
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#define DEFINE_RUNTIME_DEBUG_FLAG(C, x) \
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static_assert(!C::x, "Unexpected enabled flag in release build");
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#else
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#define DECLARE_RUNTIME_DEBUG_FLAG(x) \
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static bool x;
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#define DEFINE_RUNTIME_DEBUG_FLAG(C, x) \
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bool C::x = RegisterRuntimeDebugFlag(&C::x);
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#endif // NDEBUG
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bool RegisterRuntimeDebugFlag(bool* runtime_debug_flag);
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void SetRuntimeDebugFlagsEnabled(bool enabled);
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} // namespace art
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#endif // ART_LIBARTBASE_BASE_RUNTIME_DEBUG_H_
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