| // Copyright 2006-2008 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials provided |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #ifndef V8_LOG_H_ |
| #define V8_LOG_H_ |
| |
| #include "platform.h" |
| #include "log-utils.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| // Logger is used for collecting logging information from V8 during |
| // execution. The result is dumped to a file. |
| // |
| // Available command line flags: |
| // |
| // --log |
| // Minimal logging (no API, code, or GC sample events), default is off. |
| // |
| // --log-all |
| // Log all events to the file, default is off. This is the same as combining |
| // --log-api, --log-code, --log-gc, and --log-regexp. |
| // |
| // --log-api |
| // Log API events to the logfile, default is off. --log-api implies --log. |
| // |
| // --log-code |
| // Log code (create, move, and delete) events to the logfile, default is off. |
| // --log-code implies --log. |
| // |
| // --log-gc |
| // Log GC heap samples after each GC that can be processed by hp2ps, default |
| // is off. --log-gc implies --log. |
| // |
| // --log-regexp |
| // Log creation and use of regular expressions, Default is off. |
| // --log-regexp implies --log. |
| // |
| // --logfile <filename> |
| // Specify the name of the logfile, default is "v8.log". |
| // |
| // --prof |
| // Collect statistical profiling information (ticks), default is off. The |
| // tick profiler requires code events, so --prof implies --log-code. |
| |
| // Forward declarations. |
| class Ticker; |
| class Profiler; |
| class Semaphore; |
| class SlidingStateWindow; |
| class LogMessageBuilder; |
| |
| #undef LOG |
| #ifdef ENABLE_LOGGING_AND_PROFILING |
| #define LOG(isolate, Call) \ |
| do { \ |
| v8::internal::Logger* logger = \ |
| (isolate)->logger(); \ |
| if (logger->is_logging()) \ |
| logger->Call; \ |
| } while (false) |
| #else |
| #define LOG(isolate, Call) ((void) 0) |
| #endif |
| |
| #define LOG_EVENTS_AND_TAGS_LIST(V) \ |
| V(CODE_CREATION_EVENT, "code-creation") \ |
| V(CODE_MOVE_EVENT, "code-move") \ |
| V(CODE_DELETE_EVENT, "code-delete") \ |
| V(CODE_MOVING_GC, "code-moving-gc") \ |
| V(SHARED_FUNC_MOVE_EVENT, "sfi-move") \ |
| V(SNAPSHOT_POSITION_EVENT, "snapshot-pos") \ |
| V(TICK_EVENT, "tick") \ |
| V(REPEAT_META_EVENT, "repeat") \ |
| V(BUILTIN_TAG, "Builtin") \ |
| V(CALL_DEBUG_BREAK_TAG, "CallDebugBreak") \ |
| V(CALL_DEBUG_PREPARE_STEP_IN_TAG, "CallDebugPrepareStepIn") \ |
| V(CALL_IC_TAG, "CallIC") \ |
| V(CALL_INITIALIZE_TAG, "CallInitialize") \ |
| V(CALL_MEGAMORPHIC_TAG, "CallMegamorphic") \ |
| V(CALL_MISS_TAG, "CallMiss") \ |
| V(CALL_NORMAL_TAG, "CallNormal") \ |
| V(CALL_PRE_MONOMORPHIC_TAG, "CallPreMonomorphic") \ |
| V(KEYED_CALL_DEBUG_BREAK_TAG, "KeyedCallDebugBreak") \ |
| V(KEYED_CALL_DEBUG_PREPARE_STEP_IN_TAG, \ |
| "KeyedCallDebugPrepareStepIn") \ |
| V(KEYED_CALL_IC_TAG, "KeyedCallIC") \ |
| V(KEYED_CALL_INITIALIZE_TAG, "KeyedCallInitialize") \ |
| V(KEYED_CALL_MEGAMORPHIC_TAG, "KeyedCallMegamorphic") \ |
| V(KEYED_CALL_MISS_TAG, "KeyedCallMiss") \ |
| V(KEYED_CALL_NORMAL_TAG, "KeyedCallNormal") \ |
| V(KEYED_CALL_PRE_MONOMORPHIC_TAG, "KeyedCallPreMonomorphic") \ |
| V(CALLBACK_TAG, "Callback") \ |
| V(EVAL_TAG, "Eval") \ |
| V(FUNCTION_TAG, "Function") \ |
| V(KEYED_LOAD_IC_TAG, "KeyedLoadIC") \ |
| V(KEYED_EXTERNAL_ARRAY_LOAD_IC_TAG, "KeyedExternalArrayLoadIC") \ |
| V(KEYED_STORE_IC_TAG, "KeyedStoreIC") \ |
| V(KEYED_EXTERNAL_ARRAY_STORE_IC_TAG, "KeyedExternalArrayStoreIC")\ |
| V(LAZY_COMPILE_TAG, "LazyCompile") \ |
| V(LOAD_IC_TAG, "LoadIC") \ |
| V(REG_EXP_TAG, "RegExp") \ |
| V(SCRIPT_TAG, "Script") \ |
| V(STORE_IC_TAG, "StoreIC") \ |
| V(STUB_TAG, "Stub") \ |
| V(NATIVE_FUNCTION_TAG, "Function") \ |
| V(NATIVE_LAZY_COMPILE_TAG, "LazyCompile") \ |
| V(NATIVE_SCRIPT_TAG, "Script") |
| // Note that 'NATIVE_' cases for functions and scripts are mapped onto |
| // original tags when writing to the log. |
| |
| |
| class Sampler; |
| |
| |
| class Logger { |
| public: |
| #define DECLARE_ENUM(enum_item, ignore) enum_item, |
| enum LogEventsAndTags { |
| LOG_EVENTS_AND_TAGS_LIST(DECLARE_ENUM) |
| NUMBER_OF_LOG_EVENTS |
| }; |
| #undef DECLARE_ENUM |
| |
| // Acquires resources for logging if the right flags are set. |
| bool Setup(); |
| |
| void EnsureTickerStarted(); |
| void EnsureTickerStopped(); |
| |
| Sampler* sampler(); |
| |
| // Frees resources acquired in Setup. |
| void TearDown(); |
| |
| // Enable the computation of a sliding window of states. |
| void EnableSlidingStateWindow(); |
| |
| // Emits an event with a string value -> (name, value). |
| void StringEvent(const char* name, const char* value); |
| |
| // Emits an event with an int value -> (name, value). |
| void IntEvent(const char* name, int value); |
| void IntPtrTEvent(const char* name, intptr_t value); |
| |
| // Emits an event with an handle value -> (name, location). |
| void HandleEvent(const char* name, Object** location); |
| |
| // Emits memory management events for C allocated structures. |
| void NewEvent(const char* name, void* object, size_t size); |
| void DeleteEvent(const char* name, void* object); |
| |
| // Static versions of the above, operate on current isolate's logger. |
| // Used in TRACK_MEMORY(TypeName) defined in globals.h |
| static void NewEventStatic(const char* name, void* object, size_t size); |
| static void DeleteEventStatic(const char* name, void* object); |
| |
| // Emits an event with a tag, and some resource usage information. |
| // -> (name, tag, <rusage information>). |
| // Currently, the resource usage information is a process time stamp |
| // and a real time timestamp. |
| void ResourceEvent(const char* name, const char* tag); |
| |
| // Emits an event that an undefined property was read from an |
| // object. |
| void SuspectReadEvent(String* name, Object* obj); |
| |
| // Emits an event when a message is put on or read from a debugging queue. |
| // DebugTag lets us put a call-site specific label on the event. |
| void DebugTag(const char* call_site_tag); |
| void DebugEvent(const char* event_type, Vector<uint16_t> parameter); |
| |
| |
| // ==== Events logged by --log-api. ==== |
| void ApiNamedSecurityCheck(Object* key); |
| void ApiIndexedSecurityCheck(uint32_t index); |
| void ApiNamedPropertyAccess(const char* tag, JSObject* holder, Object* name); |
| void ApiIndexedPropertyAccess(const char* tag, |
| JSObject* holder, |
| uint32_t index); |
| void ApiObjectAccess(const char* tag, JSObject* obj); |
| void ApiEntryCall(const char* name); |
| |
| |
| // ==== Events logged by --log-code. ==== |
| // Emits a code event for a callback function. |
| void CallbackEvent(String* name, Address entry_point); |
| void GetterCallbackEvent(String* name, Address entry_point); |
| void SetterCallbackEvent(String* name, Address entry_point); |
| // Emits a code create event. |
| void CodeCreateEvent(LogEventsAndTags tag, |
| Code* code, const char* source); |
| void CodeCreateEvent(LogEventsAndTags tag, |
| Code* code, String* name); |
| void CodeCreateEvent(LogEventsAndTags tag, |
| Code* code, |
| SharedFunctionInfo* shared, |
| String* name); |
| void CodeCreateEvent(LogEventsAndTags tag, |
| Code* code, |
| SharedFunctionInfo* shared, |
| String* source, int line); |
| void CodeCreateEvent(LogEventsAndTags tag, Code* code, int args_count); |
| void CodeMovingGCEvent(); |
| // Emits a code create event for a RegExp. |
| void RegExpCodeCreateEvent(Code* code, String* source); |
| // Emits a code move event. |
| void CodeMoveEvent(Address from, Address to); |
| // Emits a code delete event. |
| void CodeDeleteEvent(Address from); |
| |
| void SharedFunctionInfoMoveEvent(Address from, Address to); |
| |
| void SnapshotPositionEvent(Address addr, int pos); |
| |
| // ==== Events logged by --log-gc. ==== |
| // Heap sampling events: start, end, and individual types. |
| void HeapSampleBeginEvent(const char* space, const char* kind); |
| void HeapSampleEndEvent(const char* space, const char* kind); |
| void HeapSampleItemEvent(const char* type, int number, int bytes); |
| void HeapSampleJSConstructorEvent(const char* constructor, |
| int number, int bytes); |
| void HeapSampleJSRetainersEvent(const char* constructor, |
| const char* event); |
| void HeapSampleJSProducerEvent(const char* constructor, |
| Address* stack); |
| void HeapSampleStats(const char* space, const char* kind, |
| intptr_t capacity, intptr_t used); |
| |
| void SharedLibraryEvent(const char* library_path, |
| uintptr_t start, |
| uintptr_t end); |
| void SharedLibraryEvent(const wchar_t* library_path, |
| uintptr_t start, |
| uintptr_t end); |
| |
| // ==== Events logged by --log-regexp ==== |
| // Regexp compilation and execution events. |
| |
| void RegExpCompileEvent(Handle<JSRegExp> regexp, bool in_cache); |
| |
| // Log an event reported from generated code |
| void LogRuntime(Vector<const char> format, JSArray* args); |
| |
| #ifdef ENABLE_LOGGING_AND_PROFILING |
| bool is_logging() { |
| return logging_nesting_ > 0; |
| } |
| |
| // Pause/Resume collection of profiling data. |
| // When data collection is paused, CPU Tick events are discarded until |
| // data collection is Resumed. |
| void PauseProfiler(int flags, int tag); |
| void ResumeProfiler(int flags, int tag); |
| int GetActiveProfilerModules(); |
| |
| // If logging is performed into a memory buffer, allows to |
| // retrieve previously written messages. See v8.h. |
| int GetLogLines(int from_pos, char* dest_buf, int max_size); |
| |
| // Logs all compiled functions found in the heap. |
| void LogCompiledFunctions(); |
| // Logs all accessor callbacks found in the heap. |
| void LogAccessorCallbacks(); |
| // Used for logging stubs found in the snapshot. |
| void LogCodeObjects(); |
| |
| // Converts tag to a corresponding NATIVE_... if the script is native. |
| INLINE(static LogEventsAndTags ToNativeByScript(LogEventsAndTags, Script*)); |
| |
| // Profiler's sampling interval (in milliseconds). |
| static const int kSamplingIntervalMs = 1; |
| |
| // Callback from Log, stops profiling in case of insufficient resources. |
| void LogFailure(); |
| |
| private: |
| Logger(); |
| ~Logger(); |
| |
| // Emits the profiler's first message. |
| void ProfilerBeginEvent(); |
| |
| // Emits callback event messages. |
| void CallbackEventInternal(const char* prefix, |
| const char* name, |
| Address entry_point); |
| |
| // Internal configurable move event. |
| void MoveEventInternal(LogEventsAndTags event, Address from, Address to); |
| |
| // Internal configurable move event. |
| void DeleteEventInternal(LogEventsAndTags event, Address from); |
| |
| // Emits the source code of a regexp. Used by regexp events. |
| void LogRegExpSource(Handle<JSRegExp> regexp); |
| |
| // Used for logging stubs found in the snapshot. |
| void LogCodeObject(Object* code_object); |
| |
| // Emits general information about generated code. |
| void LogCodeInfo(); |
| |
| // Handles code creation when low-level profiling is active. |
| void LowLevelCodeCreateEvent(Code* code, LogMessageBuilder* msg); |
| |
| // Emits a profiler tick event. Used by the profiler thread. |
| void TickEvent(TickSample* sample, bool overflow); |
| |
| void ApiEvent(const char* name, ...); |
| |
| // Logs a StringEvent regardless of whether FLAG_log is true. |
| void UncheckedStringEvent(const char* name, const char* value); |
| |
| // Logs an IntEvent regardless of whether FLAG_log is true. |
| void UncheckedIntEvent(const char* name, int value); |
| void UncheckedIntPtrTEvent(const char* name, intptr_t value); |
| |
| // Returns whether profiler's sampler is active. |
| bool IsProfilerSamplerActive(); |
| |
| // The sampler used by the profiler and the sliding state window. |
| Ticker* ticker_; |
| |
| // When the statistical profile is active, profiler_ |
| // points to a Profiler, that handles collection |
| // of samples. |
| Profiler* profiler_; |
| |
| // SlidingStateWindow instance keeping a sliding window of the most |
| // recent VM states. |
| SlidingStateWindow* sliding_state_window_; |
| |
| // An array of log events names. |
| const char* const* log_events_; |
| |
| // Internal implementation classes with access to |
| // private members. |
| friend class EventLog; |
| friend class Isolate; |
| friend class LogMessageBuilder; |
| friend class TimeLog; |
| friend class Profiler; |
| friend class SlidingStateWindow; |
| friend class StackTracer; |
| friend class VMState; |
| |
| friend class LoggerTestHelper; |
| |
| |
| int logging_nesting_; |
| int cpu_profiler_nesting_; |
| int heap_profiler_nesting_; |
| |
| Log* log_; |
| |
| // Guards against multiple calls to TearDown() that can happen in some tests. |
| // 'true' between Setup() and TearDown(). |
| bool is_initialized_; |
| |
| // Support for 'incremental addresses' in compressed logs: |
| // LogMessageBuilder::AppendAddress(Address addr) |
| Address last_address_; |
| // Logger::TickEvent(...) |
| Address prev_sp_; |
| Address prev_function_; |
| // Logger::MoveEventInternal(...) |
| Address prev_to_; |
| // Logger::FunctionCreateEvent(...) |
| Address prev_code_; |
| |
| friend class CpuProfiler; |
| #else |
| bool is_logging() { return false; } |
| #endif |
| }; |
| |
| |
| // Process wide registry of samplers. |
| class SamplerRegistry : public AllStatic { |
| public: |
| enum State { |
| HAS_NO_SAMPLERS, |
| HAS_SAMPLERS, |
| HAS_CPU_PROFILING_SAMPLERS |
| }; |
| |
| typedef void (*VisitSampler)(Sampler*, void*); |
| |
| static State GetState(); |
| |
| // Iterates over all active samplers keeping the internal lock held. |
| // Returns whether there are any active samplers. |
| static bool IterateActiveSamplers(VisitSampler func, void* param); |
| |
| // Adds/Removes an active sampler. |
| static void AddActiveSampler(Sampler* sampler); |
| static void RemoveActiveSampler(Sampler* sampler); |
| |
| private: |
| static bool ActiveSamplersExist() { |
| return active_samplers_ != NULL && !active_samplers_->is_empty(); |
| } |
| |
| static Mutex* mutex_; // Protects the state below. |
| static List<Sampler*>* active_samplers_; |
| |
| DISALLOW_IMPLICIT_CONSTRUCTORS(SamplerRegistry); |
| }; |
| |
| |
| // Class that extracts stack trace, used for profiling. |
| class StackTracer : public AllStatic { |
| public: |
| static void Trace(Isolate* isolate, TickSample* sample); |
| }; |
| |
| } } // namespace v8::internal |
| |
| |
| #endif // V8_LOG_H_ |
