1 // Copyright (C) 2019 The Android Open Source Project 2 // Copyright (C) 2019 Google Inc. 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 #pragma once 16 17 #include <inttypes.h> 18 19 // Library to perform tracing. Talks to platform-specific 20 // tracing libraries. 21 namespace android { 22 namespace base { 23 24 // New tracing API that talks to an underlying tracing library, possibly perfetto. 25 // 26 // Sets up global state useful for tracing. 27 void initializeTracing(); 28 29 // Enable/disable tracing 30 void enableTracing(); 31 void disableTracing(); 32 33 // Set the time of traces on the host to be at this guest time. 34 // Not needed if we assume timestamps can be transferrable (e.g., 35 // when RDTSC with raw passthrough is used) 36 void setGuestTime(uint64_t guestTime); 37 38 // Record a counter of some kind. 39 void traceCounter(const char* tag, int64_t value); 40 41 void beginTrace(const char* name); 42 void endTrace(); 43 44 class ScopedTrace { 45 public: 46 ScopedTrace(const char* name); 47 ~ScopedTrace(); 48 }; 49 50 class ScopedTraceDerived : public ScopedTrace { 51 public: 52 void* member = nullptr; 53 }; 54 55 void setGuestTime(uint64_t t); 56 57 void enableTracing(); 58 void disableTracing(); 59 60 bool shouldEnableTracing(); 61 62 void traceCounter(const char* name, int64_t value); 63 64 } // namespace base 65 } // namespace android 66 67 #define __AEMU_GENSYM2(x,y) x##y 68 #define __AEMU_GENSYM1(x,y) __AEMU_GENSYM2(x,y) 69 #define AEMU_GENSYM(x) __AEMU_GENSYM1(x,__COUNTER__) 70 71 #define AEMU_SCOPED_TRACE(tag) __attribute__ ((unused)) android::base::ScopedTrace AEMU_GENSYM(aemuScopedTrace_)(tag) 72 #define AEMU_SCOPED_TRACE_CALL() AEMU_SCOPED_TRACE(__func__) 73 #define AEMU_SCOPED_THRESHOLD_TRACE_CALL() 74 #define AEMU_SCOPED_THRESHOLD_TRACE(...) 75