1 /* 2 * Copyright (C) 2011 The Android Open Source Project 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 #include "runtime_debug.h" 18 19 #include <vector> 20 21 #include "globals.h" 22 23 namespace art { 24 25 // We test here that the runtime-debug-checks are actually a no-op constexpr false in release 26 // builds, as we can't check that in gtests (which are always debug). 27 28 #ifdef NDEBUG 29 namespace { 30 DECLARE_RUNTIME_DEBUG_FLAG(kTestForConstexpr); 31 static_assert(!kTestForConstexpr, "Issue with DECLARE_RUNTIME_DEBUG_FLAG in NDEBUG."); 32 } 33 #endif 34 35 // Implementation of runtime debug flags. This should be compile-time optimized away in release 36 // builds. 37 namespace { 38 bool gSlowEnabled = false; // Default for slow flags is "off." 39 40 // Use a function with a static to ensure our vector storage doesn't have initialization order 41 // issues. GetFlagPtrs()42std::vector<bool*>& GetFlagPtrs() { 43 static std::vector<bool*> g_flag_ptrs; 44 return g_flag_ptrs; 45 } 46 RegisterRuntimeDebugFlagImpl(bool * flag_ptr)47bool RegisterRuntimeDebugFlagImpl(bool* flag_ptr) { 48 GetFlagPtrs().push_back(flag_ptr); 49 return gSlowEnabled; 50 } 51 SetRuntimeDebugFlagsEnabledImpl(bool enabled)52void SetRuntimeDebugFlagsEnabledImpl(bool enabled) { 53 gSlowEnabled = enabled; 54 for (bool* flag_ptr : GetFlagPtrs()) { 55 *flag_ptr = enabled; 56 } 57 } 58 59 } // namespace 60 RegisterRuntimeDebugFlag(bool * flag_ptr)61bool RegisterRuntimeDebugFlag(bool* flag_ptr) { 62 if (kIsDebugBuild) { 63 return RegisterRuntimeDebugFlagImpl(flag_ptr); 64 } 65 return false; 66 } 67 SetRuntimeDebugFlagsEnabled(bool enabled)68void SetRuntimeDebugFlagsEnabled(bool enabled) { 69 if (kIsDebugBuild) { 70 SetRuntimeDebugFlagsEnabledImpl(enabled); 71 } 72 } 73 74 } // namespace art 75