diff options
Diffstat (limited to 'src/core')
-rw-r--r-- | src/core/SkATrace.cpp | 69 | ||||
-rw-r--r-- | src/core/SkATrace.h | 54 |
2 files changed, 123 insertions, 0 deletions
diff --git a/src/core/SkATrace.cpp b/src/core/SkATrace.cpp new file mode 100644 index 0000000000..b40795e4da --- /dev/null +++ b/src/core/SkATrace.cpp @@ -0,0 +1,69 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "SkATrace.h" + +#include "SkTraceEvent.h" + +#ifdef SK_BUILD_FOR_ANDROID +#include <dlfcn.h> +#endif + +SkATrace::SkATrace() : fBeginSection(nullptr), fEndSection(nullptr), fIsEnabled(nullptr) { +#ifdef SK_BUILD_FOR_ANDROID + if (void* lib = dlopen("libandroid.so", RTLD_NOW | RTLD_LOCAL)) { + fBeginSection = (decltype(fBeginSection))dlsym(lib, "ATrace_beginSection"); + fEndSection = (decltype(fEndSection))dlsym(lib, "ATrace_endSection"); + fIsEnabled = (decltype(fIsEnabled))dlsym(lib, "ATrace_isEnabled"); + } +#endif + if (!fIsEnabled) { + fIsEnabled = []{ return false; }; + } +} + +SkEventTracer::Handle SkATrace::addTraceEvent(char phase, + const uint8_t* categoryEnabledFlag, + const char* name, + uint64_t id, + int numArgs, + const char** argNames, + const uint8_t* argTypes, + const uint64_t* argValues, + uint8_t flags) { + if (fIsEnabled()) { + if (TRACE_EVENT_PHASE_COMPLETE == phase || + TRACE_EVENT_PHASE_BEGIN == phase || + TRACE_EVENT_PHASE_INSTANT == phase) { + fBeginSection(name); + } + + if (TRACE_EVENT_PHASE_END == phase || + TRACE_EVENT_PHASE_INSTANT == phase) { + fEndSection(); + } + } + return 0; +} + +void SkATrace::updateTraceEventDuration(const uint8_t* categoryEnabledFlag, + const char* name, + SkEventTracer::Handle handle) { + // This is only ever called from a scoped trace event so we will just end the ATrace section. + if (fIsEnabled()) { + fEndSection(); + } +} + +const uint8_t* SkATrace::getCategoryGroupEnabled(const char* name) { + // Chrome tracing is setup to not repeatly call this function once it has been initialized. So + // we can't use this to do a check for ATrace isEnabled(). Thus we will always return yes here + // and then check to see if ATrace is enabled when beginning and ending a section. + static uint8_t yes = SkEventTracer::kEnabledForRecording_CategoryGroupEnabledFlags; + return &yes; +} + diff --git a/src/core/SkATrace.h b/src/core/SkATrace.h new file mode 100644 index 0000000000..f870c5a57b --- /dev/null +++ b/src/core/SkATrace.h @@ -0,0 +1,54 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkATrace_DEFINED +#define SkATrace_DEFINED + +#include "SkEventTracer.h" + +/** + * This class is used to support ATrace in android apps. It hooks into the SkEventTracer system. It + * currently supports the macros TRACE_EVENT*, TRACE_EVENT_INSTANT*, and TRANCE_EVENT_BEGIN/END*. + * For versions of these calls that take additoinal args and value pairs we currently just drop them + * and report only the name. Since ATrace is a simple push and pop system (all traces are fully + * nested), if using BEGIN and END you should also make sure your calls are properly nested (i.e. if + * startA is before startB, then endB is before endA). + */ +class SkATrace : public SkEventTracer { +public: + SkATrace(); + + SkEventTracer::Handle addTraceEvent(char phase, + const uint8_t* categoryEnabledFlag, + const char* name, + uint64_t id, + int numArgs, + const char** argNames, + const uint8_t* argTypes, + const uint64_t* argValues, + uint8_t flags) override; + + + void updateTraceEventDuration(const uint8_t* categoryEnabledFlag, + const char* name, + SkEventTracer::Handle handle) override; + + const uint8_t* getCategoryGroupEnabled(const char* name) override; + + const char* getCategoryGroupName(const uint8_t* categoryEnabledFlag) override { + static const char* category = "skiaATrace"; + return category; + } + +private: + void (*fBeginSection)(const char*); + void (*fEndSection)(void); + bool (*fIsEnabled)(void); +}; + +#endif + |