// Copyright 2009 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.
#include <stdarg.h>
#include "v8.h"
#include "bootstrapper.h"
#include "code-stubs.h"
#include "deoptimizer.h"
#include "global-handles.h"
#include "log.h"
#include "macro-assembler.h"
#include "runtime-profiler.h"
#include "serialize.h"
#include "string-stream.h"
#include "vm-state-inl.h"
namespace v8 {
namespace internal {
#ifdef ENABLE_LOGGING_AND_PROFILING
//
// Sliding state window. Updates counters to keep track of the last
// window of kBufferSize states. This is useful to track where we
// spent our time.
//
class SlidingStateWindow {
public:
explicit SlidingStateWindow(Isolate* isolate);
~SlidingStateWindow();
void AddState(StateTag state);
private:
static const int kBufferSize = 256;
Counters* counters_;
int current_index_;
bool is_full_;
byte buffer_[kBufferSize];
void IncrementStateCounter(StateTag state) {
counters_->state_counters(state)->Increment();
}
void DecrementStateCounter(StateTag state) {
counters_->state_counters(state)->Decrement();
}
};
//
// The Profiler samples pc and sp values for the main thread.
// Each sample is appended to a circular buffer.
// An independent thread removes data and writes it to the log.
// This design minimizes the time spent in the sampler.
//
class Profiler: public Thread {
public:
explicit Profiler(Isolate* isolate);
void Engage();
void Disengage();
// Inserts collected profiling data into buffer.
void Insert(TickSample* sample) {
if (paused_)
return;
if (Succ(head_) == tail_) {
overflow_ = true;
} else {
buffer_[head_] = *sample;
head_ = Succ(head_);
buffer_semaphore_->Signal(); // Tell we have an element.
}
}
// Waits for a signal and removes profiling data.
bool Remove(TickSample* sample) {
buffer_semaphore_->Wait(); // Wait for an element.
*sample = buffer_[tail_];
bool result = overflow_;
tail_ = Succ(tail_);
overflow_ = false;
return result;
}
void Run();
// Pause and Resume TickSample data collection.
bool paused() const { return paused_; }
void pause() { paused_ = true; }
void resume() { paused_ = false; }
private:
// Returns the next index in the cyclic buffer.
int Succ(int index) { return (index + 1) % kBufferSize; }
// Cyclic buffer for communicating profiling samples
// between the signal handler and the worker thread.
static const int kBufferSize = 128;
TickSample buffer_[kBufferSize]; // Buffer storage.
int head_; // Index to the buffer head.
int tail_; // Index to the buffer tail.
bool overflow_; // Tell whether a buffer overflow has occurred.
Semaphore* buffer_semaphore_; // Sempahore used for buffer synchronization.
// Tells whether profiler is engaged, that is, processing thread is stated.
bool engaged_;
// Tells whether worker thread should continue running.
bool running_;
// Tells whether we are currently recording tick samples.
bool paused_;
};
//
// StackTracer implementation
//
void StackTracer::Trace(Isolate* isolate, TickSample* sample) {
ASSERT(isolate->IsInitialized());
sample->tos = NULL;
sample->frames_count = 0;
sample->has_external_callback = false;
// Avoid collecting traces while doing GC.
if (sample->state == GC) return;
const Address js_entry_sp =
Isolate::js_entry_sp(isolate->thread_local_top());
if (js_entry_sp == 0) {
// Not executing JS now.
return;
}
const Address callback = isolate->external_callback();
if (callback != NULL) {
sample->external_callback = callback;
sample->has_external_callback = true;
} else {
// Sample potential return address value for frameless invocation of
// stubs (we'll figure out later, if this value makes sense).
sample->tos = Memory::Address_at(sample->sp);
sample->has_external_callback = false;
}
SafeStackTraceFrameIterator it(isolate,
sample->fp, sample->sp,
sample->sp, js_entry_sp);
int i = 0;
while (!it.done() && i < TickSample::kMaxFramesCount) {
sample->stack[i++] = it.frame()->pc();
it.Advance();
}
sample->frames_count = i;
}
//
// Ticker used to provide ticks to the profiler and the sliding state
// window.
//
class Ticker: public Sampler {
public:
Ticker(Isolate* isolate, int interval):
Sampler(isolate, interval),
window_(NULL),
profiler_(NULL) {}
~Ticker() { if (IsActive()) Stop(); }
virtual void Tick(TickSample* sample) {
if (profiler_) profiler_->Insert(sample);
if (window_) window_->AddState(sample->state);
}
void SetWindow(SlidingStateWindow* window) {
window_ = window;
if (!IsActive()) Start();
}
void ClearWindow() {
window_ = NULL;
if (!profiler_ && IsActive() && !RuntimeProfiler::IsEnabled()) Stop();
}
void SetProfiler(Profiler* profiler) {
ASSERT(profiler_ == NULL);
profiler_ = profiler;
IncreaseProfilingDepth();
if (!FLAG_prof_lazy && !IsActive()) Start();
}
void ClearProfiler() {
DecreaseProfilingDepth();
profiler_ = NULL;
if (!window_ && IsActive() && !RuntimeProfiler::IsEnabled()) Stop();
}
protected:
virtual void DoSampleStack(TickSample* sample) {
StackTracer::Trace(isolate(), sample);
}
private:
SlidingStateWindow* window_;
Profiler* profiler_;
};
//
// SlidingStateWindow implementation.
//
SlidingStateWindow::SlidingStateWindow(Isolate* isolate)
: counters_(isolate->counters()), current_index_(0), is_full_(false) {
for (int i = 0; i < kBufferSize; i++) {
buffer_[i] = static_cast<byte>(OTHER);
}
isolate->logger()->ticker_->SetWindow(this);
}
SlidingStateWindow::~SlidingStateWindow() {
LOGGER->ticker_->ClearWindow();
}
void SlidingStateWindow::AddState(StateTag state) {
if (is_full_) {
DecrementStateCounter(static_cast<StateTag>(buffer_[current_index_]));
} else if (current_index_ == kBufferSize - 1) {
is_full_ = true;
}
buffer_[current_index_] = static_cast<byte>(state);
IncrementStateCounter(state);
ASSERT(IsPowerOf2(kBufferSize));
current_index_ = (current_index_ + 1) & (kBufferSize - 1);
}
//
// Profiler implementation.
//
Profiler::Profiler(Isolate* isolate)
: Thread(isolate, "v8:Profiler"),
head_(0),
tail_(0),
overflow_(false),
buffer_semaphore_(OS::CreateSemaphore(0)),
engaged_(false),
running_(false),
paused_(false) {
}
void Profiler::Engage() {
if (engaged_) return;
engaged_ = true;
// TODO(mnaganov): This is actually "Chromium" mode. Flags need to be revised.
// http://code.google.com/p/v8/issues/detail?id=487
if (!FLAG_prof_lazy) {
OS::LogSharedLibraryAddresses();
}
// Start thread processing the profiler buffer.
running_ = true;
Start();
// Register to get ticks.
LOGGER->ticker_->SetProfiler(this);
LOGGER->ProfilerBeginEvent();
}
void Profiler::Disengage() {
if (!engaged_) return;
// Stop receiving ticks.
LOGGER->ticker_->ClearProfiler();
// Terminate the worker thread by setting running_ to false,
// inserting a fake element in the queue and then wait for
// the thread to terminate.
running_ = false;
TickSample sample;
// Reset 'paused_' flag, otherwise semaphore may not be signalled.
resume();
Insert(&sample);
Join();
LOG(ISOLATE, UncheckedStringEvent("profiler", "end"));
}
void Profiler::Run() {
TickSample sample;
bool overflow = Remove(&sample);
i::Isolate* isolate = ISOLATE;
while (running_) {
LOG(isolate, TickEvent(&sample, overflow));
overflow = Remove(&sample);
}
}
//
// Logger class implementation.
//
Logger::Logger()
: ticker_(NULL),
profiler_(NULL),
sliding_state_window_(NULL),
log_events_(NULL),
logging_nesting_(0),
cpu_profiler_nesting_(0),
heap_profiler_nesting_(0),
log_(new Log(this)),
is_initialized_(false),
last_address_(NULL),
prev_sp_(NULL),
prev_function_(NULL),
prev_to_(NULL),
prev_code_(NULL) {
}
Logger::~Logger() {
delete log_;
}
#define DECLARE_EVENT(ignore1, name) name,
static const char* const kLogEventsNames[Logger::NUMBER_OF_LOG_EVENTS] = {
LOG_EVENTS_AND_TAGS_LIST(DECLARE_EVENT)
};
#undef DECLARE_EVENT
void Logger::ProfilerBeginEvent() {
if (!log_->IsEnabled()) return;
LogMessageBuilder msg(this);
msg.Append("profiler,\"begin\",%d\n", kSamplingIntervalMs);
msg.WriteToLogFile();
}
#endif // ENABLE_LOGGING_AND_PROFILING
void Logger::StringEvent(const char* name, const char* value) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (FLAG_log) UncheckedStringEvent(name, value);
#endif
}
#ifdef ENABLE_LOGGING_AND_PROFILING
void Logger::UncheckedStringEvent(const char* name, const char* value) {
if (!log_->IsEnabled()) return;
LogMessageBuilder msg(this);
msg.Append("%s,\"%s\"\n", name, value);
msg.WriteToLogFile();
}
#endif
void Logger::IntEvent(const char* name, int value) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (FLAG_log) UncheckedIntEvent(name, value);
#endif
}
void Logger::IntPtrTEvent(const char* name, intptr_t value) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (FLAG_log) UncheckedIntPtrTEvent(name, value);
#endif
}
#ifdef ENABLE_LOGGING_AND_PROFILING
void Logger::UncheckedIntEvent(const char* name, int value) {
if (!log_->IsEnabled()) return;
LogMessageBuilder msg(this);
msg.Append("%s,%d\n", name, value);
msg.WriteToLogFile();
}
#endif
#ifdef ENABLE_LOGGING_AND_PROFILING
void Logger::UncheckedIntPtrTEvent(const char* name, intptr_t value) {
if (!log_->IsEnabled()) return;
LogMessageBuilder msg(this);
msg.Append("%s,%" V8_PTR_PREFIX "d\n", name, value);
msg.WriteToLogFile();
}
#endif
void Logger::HandleEvent(const char* name, Object** location) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (!log_->IsEnabled() || !FLAG_log_handles) return;
LogMessageBuilder msg(this);
msg.Append("%s,0x%" V8PRIxPTR "\n", name, location);
msg.WriteToLogFile();
#endif
}
#ifdef ENABLE_LOGGING_AND_PROFILING
// ApiEvent is private so all the calls come from the Logger class. It is the
// caller's responsibility to ensure that log is enabled and that
// FLAG_log_api is true.
void Logger::ApiEvent(const char* format, ...) {
ASSERT(log_->IsEnabled() && FLAG_log_api);
LogMessageBuilder msg(this);
va_list ap;
va_start(ap, format);
msg.AppendVA(format, ap);
va_end(ap);
msg.WriteToLogFile();
}
#endif
void Logger::ApiNamedSecurityCheck(Object* key) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (!log_->IsEnabled() || !FLAG_log_api) return;
if (key->IsString()) {
SmartPointer<char> str =
String::cast(key)->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL);
ApiEvent("api,check-security,\"%s\"\n", *str);
} else if (key->IsUndefined()) {
ApiEvent("api,check-security,undefined\n");
} else {
ApiEvent("api,check-security,['no-name']\n");
}
#endif
}
void Logger::SharedLibraryEvent(const char* library_path,
uintptr_t start,
uintptr_t end) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (!log_->IsEnabled() || !FLAG_prof) return;
LogMessageBuilder msg(this);
msg.Append("shared-library,\"%s\",0x%08" V8PRIxPTR ",0x%08" V8PRIxPTR "\n",
library_path,
start,
end);
msg.WriteToLogFile();
#endif
}
void Logger::SharedLibraryEvent(const wchar_t* library_path,
uintptr_t start,
uintptr_t end) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (!log_->IsEnabled() || !FLAG_prof) return;
LogMessageBuilder msg(this);
msg.Append("shared-library,\"%ls\",0x%08" V8PRIxPTR ",0x%08" V8PRIxPTR "\n",
library_path,
start,
end);
msg.WriteToLogFile();
#endif
}
#ifdef ENABLE_LOGGING_AND_PROFILING
void Logger::LogRegExpSource(Handle<JSRegExp> regexp) {
// Prints "/" + re.source + "/" +
// (re.global?"g":"") + (re.ignorecase?"i":"") + (re.multiline?"m":"")
LogMessageBuilder msg(this);
Handle<Object> source = GetProperty(regexp, "source");
if (!source->IsString()) {
msg.Append("no source");
return;
}
switch (regexp->TypeTag()) {
case JSRegExp::ATOM:
msg.Append('a');
break;
default:
break;
}
msg.Append('/');
msg.AppendDetailed(*Handle<String>::cast(source), false);
msg.Append('/');
// global flag
Handle<Object> global = GetProperty(regexp, "global");
if (global->IsTrue()) {
msg.Append('g');
}
// ignorecase flag
Handle<Object> ignorecase = GetProperty(regexp, "ignoreCase");
if (ignorecase->IsTrue()) {
msg.Append('i');
}
// multiline flag
Handle<Object> multiline = GetProperty(regexp, "multiline");
if (multiline->IsTrue()) {
msg.Append('m');
}
msg.WriteToLogFile();
}
#endif // ENABLE_LOGGING_AND_PROFILING
void Logger::RegExpCompileEvent(Handle<JSRegExp> regexp, bool in_cache) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (!log_->IsEnabled() || !FLAG_log_regexp) return;
LogMessageBuilder msg(this);
msg.Append("regexp-compile,");
LogRegExpSource(regexp);
msg.Append(in_cache ? ",hit\n" : ",miss\n");
msg.WriteToLogFile();
#endif
}
void Logger::LogRuntime(Vector<const char> format, JSArray* args) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (!log_->IsEnabled() || !FLAG_log_runtime) return;
HandleScope scope;
LogMessageBuilder msg(this);
for (int i = 0; i < format.length(); i++) {
char c = format[i];
if (c == '%' && i <= format.length() - 2) {
i++;
ASSERT('0' <= format[i] && format[i] <= '9');
MaybeObject* maybe = args->GetElement(format[i] - '0');
Object* obj;
if (!maybe->ToObject(&obj)) {
msg.Append("<exception>");
continue;
}
i++;
switch (format[i]) {
case 's':
msg.AppendDetailed(String::cast(obj), false);
break;
case 'S':
msg.AppendDetailed(String::cast(obj), true);
break;
case 'r':
Logger::LogRegExpSource(Handle<JSRegExp>(JSRegExp::cast(obj)));
break;
case 'x':
msg.Append("0x%x", Smi::cast(obj)->value());
break;
case 'i':
msg.Append("%i", Smi::cast(obj)->value());
break;
default:
UNREACHABLE();
}
} else {
msg.Append(c);
}
}
msg.Append('\n');
msg.WriteToLogFile();
#endif
}
void Logger::ApiIndexedSecurityCheck(uint32_t index) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (!log_->IsEnabled() || !FLAG_log_api) return;
ApiEvent("api,check-security,%u\n", index);
#endif
}
void Logger::ApiNamedPropertyAccess(const char* tag,
JSObject* holder,
Object* name) {
#ifdef ENABLE_LOGGING_AND_PROFILING
ASSERT(name->IsString());
if (!log_->IsEnabled() || !FLAG_log_api) return;
String* class_name_obj = holder->class_name();
SmartPointer<char> class_name =
class_name_obj->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL);
SmartPointer<char> property_name =
String::cast(name)->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL);
ApiEvent("api,%s,\"%s\",\"%s\"\n", tag, *class_name, *property_name);
#endif
}
void Logger::ApiIndexedPropertyAccess(const char* tag,
JSObject* holder,
uint32_t index) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (!log_->IsEnabled() || !FLAG_log_api) return;
String* class_name_obj = holder->class_name();
SmartPointer<char> class_name =
class_name_obj->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL);
ApiEvent("api,%s,\"%s\",%u\n", tag, *class_name, index);
#endif
}
void Logger::ApiObjectAccess(const char* tag, JSObject* object) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (!log_->IsEnabled() || !FLAG_log_api) return;
String* class_name_obj = object->class_name();
SmartPointer<char> class_name =
class_name_obj->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL);
ApiEvent("api,%s,\"%s\"\n", tag, *class_name);
#endif
}
void Logger::ApiEntryCall(const char* name) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (!log_->IsEnabled() || !FLAG_log_api) return;
ApiEvent("api,%s\n", name);
#endif
}
void Logger::NewEvent(const char* name, void* object, size_t size) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (!log_->IsEnabled() || !FLAG_log) return;
LogMessageBuilder msg(this);
msg.Append("new,%s,0x%" V8PRIxPTR ",%u\n", name, object,
static_cast<unsigned int>(size));
msg.WriteToLogFile();
#endif
}
void Logger::DeleteEvent(const char* name, void* object) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (!log_->IsEnabled() || !FLAG_log) return;
LogMessageBuilder msg(this);
msg.Append("delete,%s,0x%" V8PRIxPTR "\n", name, object);
msg.WriteToLogFile();
#endif
}
void Logger::NewEventStatic(const char* name, void* object, size_t size) {
LOGGER->NewEvent(name, object, size);
}
void Logger::DeleteEventStatic(const char* name, void* object) {
LOGGER->DeleteEvent(name, object);
}
#ifdef ENABLE_LOGGING_AND_PROFILING
void Logger::CallbackEventInternal(const char* prefix, const char* name,
Address entry_point) {
if (!log_->IsEnabled() || !FLAG_log_code) return;
LogMessageBuilder msg(this);
msg.Append("%s,%s,",
kLogEventsNames[CODE_CREATION_EVENT],
kLogEventsNames[CALLBACK_TAG]);
msg.AppendAddress(entry_point);
msg.Append(",1,\"%s%s\"", prefix, name);
msg.Append('\n');
msg.WriteToLogFile();
}
#endif
void Logger::CallbackEvent(String* name, Address entry_point) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (!log_->IsEnabled() || !FLAG_log_code) return;
SmartPointer<char> str =
name->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL);
CallbackEventInternal("", *str, entry_point);
#endif
}
void Logger::GetterCallbackEvent(String* name, Address entry_point) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (!log_->IsEnabled() || !FLAG_log_code) return;
SmartPointer<char> str =
name->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL);
CallbackEventInternal("get ", *str, entry_point);
#endif
}
void Logger::SetterCallbackEvent(String* name, Address entry_point) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (!log_->IsEnabled() || !FLAG_log_code) return;
SmartPointer<char> str =
name->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL);
CallbackEventInternal("set ", *str, entry_point);
#endif
}
void Logger::CodeCreateEvent(LogEventsAndTags tag,
Code* code,
const char* comment) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (!log_->IsEnabled() || !FLAG_log_code) return;
LogMessageBuilder msg(this);
msg.Append("%s,%s,",
kLogEventsNames[CODE_CREATION_EVENT],
kLogEventsNames[tag]);
msg.AppendAddress(code->address());
msg.Append(",%d,\"", code->ExecutableSize());
for (const char* p = comment; *p != '\0'; p++) {
if (*p == '"') {
msg.Append('\\');
}
msg.Append(*p);
}
msg.Append('"');
LowLevelCodeCreateEvent(code, &msg);
msg.Append('\n');
msg.WriteToLogFile();
#endif
}
void Logger::CodeCreateEvent(LogEventsAndTags tag,
Code* code,
String* name) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (name != NULL) {
SmartPointer<char> str =
name->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL);
CodeCreateEvent(tag, code, *str);
} else {
CodeCreateEvent(tag, code, "");
}
#endif
}
#ifdef ENABLE_LOGGING_AND_PROFILING
// ComputeMarker must only be used when SharedFunctionInfo is known.
static const char* ComputeMarker(Code* code) {
switch (code->kind()) {
case Code::FUNCTION: return code->optimizable() ? "~" : "";
case Code::OPTIMIZED_FUNCTION: return "*";
default: return "";
}
}
#endif
void Logger::CodeCreateEvent(LogEventsAndTags tag,
Code* code,
SharedFunctionInfo* shared,
String* name) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (!log_->IsEnabled() || !FLAG_log_code) return;
if (code == Isolate::Current()->builtins()->builtin(
Builtins::kLazyCompile))
return;
LogMessageBuilder msg(this);
SmartPointer<char> str =
name->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL);
msg.Append("%s,%s,",
kLogEventsNames[CODE_CREATION_EVENT],
kLogEventsNames[tag]);
msg.AppendAddress(code->address());
msg.Append(",%d,\"%s\",", code->ExecutableSize(), *str);
msg.AppendAddress(shared->address());
msg.Append(",%s", ComputeMarker(code));
LowLevelCodeCreateEvent(code, &msg);
msg.Append('\n');
msg.WriteToLogFile();
#endif
}
// Although, it is possible to extract source and line from
// the SharedFunctionInfo object, we left it to caller
// to leave logging functions free from heap allocations.
void Logger::CodeCreateEvent(LogEventsAndTags tag,
Code* code,
SharedFunctionInfo* shared,
String* source, int line) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (!log_->IsEnabled() || !FLAG_log_code) return;
LogMessageBuilder msg(this);
SmartPointer<char> name =
shared->DebugName()->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL);
SmartPointer<char> sourcestr =
source->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL);
msg.Append("%s,%s,",
kLogEventsNames[CODE_CREATION_EVENT],
kLogEventsNames[tag]);
msg.AppendAddress(code->address());
msg.Append(",%d,\"%s %s:%d\",",
code->ExecutableSize(),
*name,
*sourcestr,
line);
msg.AppendAddress(shared->address());
msg.Append(",%s", ComputeMarker(code));
LowLevelCodeCreateEvent(code, &msg);
msg.Append('\n');
msg.WriteToLogFile();
#endif
}
void Logger::CodeCreateEvent(LogEventsAndTags tag, Code* code, int args_count) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (!log_->IsEnabled() || !FLAG_log_code) return;
LogMessageBuilder msg(this);
msg.Append("%s,%s,",
kLogEventsNames[CODE_CREATION_EVENT],
kLogEventsNames[tag]);
msg.AppendAddress(code->address());
msg.Append(",%d,\"args_count: %d\"", code->ExecutableSize(), args_count);
LowLevelCodeCreateEvent(code, &msg);
msg.Append('\n');
msg.WriteToLogFile();
#endif
}
void Logger::CodeMovingGCEvent() {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (!log_->IsEnabled() || !FLAG_log_code || !FLAG_ll_prof) return;
LogMessageBuilder msg(this);
msg.Append("%s\n", kLogEventsNames[CODE_MOVING_GC]);
msg.WriteToLogFile();
OS::SignalCodeMovingGC();
#endif
}
void Logger::RegExpCodeCreateEvent(Code* code, String* source) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (!log_->IsEnabled() || !FLAG_log_code) return;
LogMessageBuilder msg(this);
msg.Append("%s,%s,",
kLogEventsNames[CODE_CREATION_EVENT],
kLogEventsNames[REG_EXP_TAG]);
msg.AppendAddress(code->address());
msg.Append(",%d,\"", code->ExecutableSize());
msg.AppendDetailed(source, false);
msg.Append('\"');
LowLevelCodeCreateEvent(code, &msg);
msg.Append('\n');
msg.WriteToLogFile();
#endif
}
void Logger::CodeMoveEvent(Address from, Address to) {
#ifdef ENABLE_LOGGING_AND_PROFILING
MoveEventInternal(CODE_MOVE_EVENT, from, to);
#endif
}
void Logger::CodeDeleteEvent(Address from) {
#ifdef ENABLE_LOGGING_AND_PROFILING
DeleteEventInternal(CODE_DELETE_EVENT, from);
#endif
}
void Logger::SnapshotPositionEvent(Address addr, int pos) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (!log_->IsEnabled() || !FLAG_log_snapshot_positions) return;
LogMessageBuilder msg(this);
msg.Append("%s,", kLogEventsNames[SNAPSHOT_POSITION_EVENT]);
msg.AppendAddress(addr);
msg.Append(",%d", pos);
msg.Append('\n');
msg.WriteToLogFile();
#endif
}
void Logger::SharedFunctionInfoMoveEvent(Address from, Address to) {
#ifdef ENABLE_LOGGING_AND_PROFILING
MoveEventInternal(SHARED_FUNC_MOVE_EVENT, from, to);
#endif
}
#ifdef ENABLE_LOGGING_AND_PROFILING
void Logger::MoveEventInternal(LogEventsAndTags event,
Address from,
Address to) {
if (!log_->IsEnabled() || !FLAG_log_code) return;
LogMessageBuilder msg(this);
msg.Append("%s,", kLogEventsNames[event]);
msg.AppendAddress(from);
msg.Append(',');
msg.AppendAddress(to);
msg.Append('\n');
msg.WriteToLogFile();
}
#endif
#ifdef ENABLE_LOGGING_AND_PROFILING
void Logger::DeleteEventInternal(LogEventsAndTags event, Address from) {
if (!log_->IsEnabled() || !FLAG_log_code) return;
LogMessageBuilder msg(this);
msg.Append("%s,", kLogEventsNames[event]);
msg.AppendAddress(from);
msg.Append('\n');
msg.WriteToLogFile();
}
#endif
void Logger::ResourceEvent(const char* name, const char* tag) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (!log_->IsEnabled() || !FLAG_log) return;
LogMessageBuilder msg(this);
msg.Append("%s,%s,", name, tag);
uint32_t sec, usec;
if (OS::GetUserTime(&sec, &usec) != -1) {
msg.Append("%d,%d,", sec, usec);
}
msg.Append("%.0f", OS::TimeCurrentMillis());
msg.Append('\n');
msg.WriteToLogFile();
#endif
}
void Logger::SuspectReadEvent(String* name, Object* obj) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (!log_->IsEnabled() || !FLAG_log_suspect) return;
LogMessageBuilder msg(this);
String* class_name = obj->IsJSObject()
? JSObject::cast(obj)->class_name()
: HEAP->empty_string();
msg.Append("suspect-read,");
msg.Append(class_name);
msg.Append(',');
msg.Append('"');
msg.Append(name);
msg.Append('"');
msg.Append('\n');
msg.WriteToLogFile();
#endif
}
void Logger::HeapSampleBeginEvent(const char* space, const char* kind) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (!log_->IsEnabled() || !FLAG_log_gc) return;
LogMessageBuilder msg(this);
// Using non-relative system time in order to be able to synchronize with
// external memory profiling events (e.g. DOM memory size).
msg.Append("heap-sample-begin,\"%s\",\"%s\",%.0f\n",
space, kind, OS::TimeCurrentMillis());
msg.WriteToLogFile();
#endif
}
void Logger::HeapSampleStats(const char* space, const char* kind,
intptr_t capacity, intptr_t used) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (!log_->IsEnabled() || !FLAG_log_gc) return;
LogMessageBuilder msg(this);
msg.Append("heap-sample-stats,\"%s\",\"%s\","
"%" V8_PTR_PREFIX "d,%" V8_PTR_PREFIX "d\n",
space, kind, capacity, used);
msg.WriteToLogFile();
#endif
}
void Logger::HeapSampleEndEvent(const char* space, const char* kind) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (!log_->IsEnabled() || !FLAG_log_gc) return;
LogMessageBuilder msg(this);
msg.Append("heap-sample-end,\"%s\",\"%s\"\n", space, kind);
msg.WriteToLogFile();
#endif
}
void Logger::HeapSampleItemEvent(const char* type, int number, int bytes) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (!log_->IsEnabled() || !FLAG_log_gc) return;
LogMessageBuilder msg(this);
msg.Append("heap-sample-item,%s,%d,%d\n", type, number, bytes);
msg.WriteToLogFile();
#endif
}
void Logger::HeapSampleJSConstructorEvent(const char* constructor,
int number, int bytes) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (!log_->IsEnabled() || !FLAG_log_gc) return;
LogMessageBuilder msg(this);
msg.Append("heap-js-cons-item,%s,%d,%d\n", constructor, number, bytes);
msg.WriteToLogFile();
#endif
}
// Event starts with comma, so we don't have it in the format string.
static const char kEventText[] = "heap-js-ret-item,%s";
// We take placeholder strings into account, but it's OK to be conservative.
static const int kEventTextLen = sizeof(kEventText)/sizeof(kEventText[0]);
void Logger::HeapSampleJSRetainersEvent(
const char* constructor, const char* event) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (!log_->IsEnabled() || !FLAG_log_gc) return;
const int cons_len = StrLength(constructor);
const int event_len = StrLength(event);
int pos = 0;
// Retainer lists can be long. We may need to split them into multiple events.
do {
LogMessageBuilder msg(this);
msg.Append(kEventText, constructor);
int to_write = event_len - pos;
if (to_write > Log::kMessageBufferSize - (cons_len + kEventTextLen)) {
int cut_pos = pos + Log::kMessageBufferSize - (cons_len + kEventTextLen);
ASSERT(cut_pos < event_len);
while (cut_pos > pos && event[cut_pos] != ',') --cut_pos;
if (event[cut_pos] != ',') {
// Crash in debug mode, skip in release mode.
ASSERT(false);
return;
}
// Append a piece of event that fits, without trailing comma.
msg.AppendStringPart(event + pos, cut_pos - pos);
// Start next piece with comma.
pos = cut_pos;
} else {
msg.Append("%s", event + pos);
pos += event_len;
}
msg.Append('\n');
msg.WriteToLogFile();
} while (pos < event_len);
#endif
}
void Logger::HeapSampleJSProducerEvent(const char* constructor,
Address* stack) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (!log_->IsEnabled() || !FLAG_log_gc) return;
LogMessageBuilder msg(this);
msg.Append("heap-js-prod-item,%s", constructor);
while (*stack != NULL) {
msg.Append(",0x%" V8PRIxPTR, *stack++);
}
msg.Append("\n");
msg.WriteToLogFile();
#endif
}
void Logger::DebugTag(const char* call_site_tag) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (!log_->IsEnabled() || !FLAG_log) return;
LogMessageBuilder msg(this);
msg.Append("debug-tag,%s\n", call_site_tag);
msg.WriteToLogFile();
#endif
}
void Logger::DebugEvent(const char* event_type, Vector<uint16_t> parameter) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (!log_->IsEnabled() || !FLAG_log) return;
StringBuilder s(parameter.length() + 1);
for (int i = 0; i < parameter.length(); ++i) {
s.AddCharacter(static_cast<char>(parameter[i]));
}
char* parameter_string = s.Finalize();
LogMessageBuilder msg(this);
msg.Append("debug-queue-event,%s,%15.3f,%s\n",
event_type,
OS::TimeCurrentMillis(),
parameter_string);
DeleteArray(parameter_string);
msg.WriteToLogFile();
#endif
}
#ifdef ENABLE_LOGGING_AND_PROFILING
void Logger::TickEvent(TickSample* sample, bool overflow) {
if (!log_->IsEnabled() || !FLAG_prof) return;
LogMessageBuilder msg(this);
msg.Append("%s,", kLogEventsNames[TICK_EVENT]);
msg.AppendAddress(sample->pc);
msg.Append(',');
msg.AppendAddress(sample->sp);
if (sample->has_external_callback) {
msg.Append(",1,");
msg.AppendAddress(sample->external_callback);
} else {
msg.Append(",0,");
msg.AppendAddress(sample->tos);
}
msg.Append(",%d", static_cast<int>(sample->state));
if (overflow) {
msg.Append(",overflow");
}
for (int i = 0; i < sample->frames_count; ++i) {
msg.Append(',');
msg.AppendAddress(sample->stack[i]);
}
msg.Append('\n');
msg.WriteToLogFile();
}
int Logger::GetActiveProfilerModules() {
int result = PROFILER_MODULE_NONE;
if (profiler_ != NULL && !profiler_->paused()) {
result |= PROFILER_MODULE_CPU;
}
if (FLAG_log_gc) {
result |= PROFILER_MODULE_HEAP_STATS | PROFILER_MODULE_JS_CONSTRUCTORS;
}
return result;
}
void Logger::PauseProfiler(int flags, int tag) {
if (!log_->IsEnabled()) return;
if (profiler_ != NULL && (flags & PROFILER_MODULE_CPU)) {
// It is OK to have negative nesting.
if (--cpu_profiler_nesting_ == 0) {
profiler_->pause();
if (FLAG_prof_lazy) {
if (!FLAG_sliding_state_window && !RuntimeProfiler::IsEnabled()) {
ticker_->Stop();
}
FLAG_log_code = false;
// Must be the same message as Log::kDynamicBufferSeal.
LOG(ISOLATE, UncheckedStringEvent("profiler", "pause"));
}
--logging_nesting_;
}
}
if (flags &
(PROFILER_MODULE_HEAP_STATS | PROFILER_MODULE_JS_CONSTRUCTORS)) {
if (--heap_profiler_nesting_ == 0) {
FLAG_log_gc = false;
--logging_nesting_;
}
}
if (tag != 0) {
UncheckedIntEvent("close-tag", tag);
}
}
void Logger::ResumeProfiler(int flags, int tag) {
if (!log_->IsEnabled()) return;
if (tag != 0) {
UncheckedIntEvent("open-tag", tag);
}
if (profiler_ != NULL && (flags & PROFILER_MODULE_CPU)) {
if (cpu_profiler_nesting_++ == 0) {
++logging_nesting_;
if (FLAG_prof_lazy) {
profiler_->Engage();
LOG(ISOLATE, UncheckedStringEvent("profiler", "resume"));
FLAG_log_code = true;
LogCompiledFunctions();
LogAccessorCallbacks();
if (!FLAG_sliding_state_window && !ticker_->IsActive()) {
ticker_->Start();
}
}
profiler_->resume();
}
}
if (flags &
(PROFILER_MODULE_HEAP_STATS | PROFILER_MODULE_JS_CONSTRUCTORS)) {
if (heap_profiler_nesting_++ == 0) {
++logging_nesting_;
FLAG_log_gc = true;
}
}
}
// This function can be called when Log's mutex is acquired,
// either from main or Profiler's thread.
void Logger::LogFailure() {
PauseProfiler(PROFILER_MODULE_CPU, 0);
}
bool Logger::IsProfilerSamplerActive() {
return ticker_->IsActive();
}
int Logger::GetLogLines(int from_pos, char* dest_buf, int max_size) {
return log_->GetLogLines(from_pos, dest_buf, max_size);
}
class EnumerateOptimizedFunctionsVisitor: public OptimizedFunctionVisitor {
public:
EnumerateOptimizedFunctionsVisitor(Handle<SharedFunctionInfo>* sfis,
Handle<Code>* code_objects,
int* count)
: sfis_(sfis), code_objects_(code_objects), count_(count) { }
virtual void EnterContext(Context* context) {}
virtual void LeaveContext(Context* context) {}
virtual void VisitFunction(JSFunction* function) {
if (sfis_ != NULL) {
sfis_[*count_] = Handle<SharedFunctionInfo>(function->shared());
}
if (code_objects_ != NULL) {
ASSERT(function->code()->kind() == Code::OPTIMIZED_FUNCTION);
code_objects_[*count_] = Handle<Code>(function->code());
}
*count_ = *count_ + 1;
}
private:
Handle<SharedFunctionInfo>* sfis_;
Handle<Code>* code_objects_;
int* count_;
};
static int EnumerateCompiledFunctions(Handle<SharedFunctionInfo>* sfis,
Handle<Code>* code_objects) {
AssertNoAllocation no_alloc;
int compiled_funcs_count = 0;
// Iterate the heap to find shared function info objects and record
// the unoptimized code for them.
HeapIterator iterator;
for (HeapObject* obj = iterator.next(); obj != NULL; obj = iterator.next()) {
if (!obj->IsSharedFunctionInfo()) continue;
SharedFunctionInfo* sfi = SharedFunctionInfo::cast(obj);
if (sfi->is_compiled()
&& (!sfi->script()->IsScript()
|| Script::cast(sfi->script())->HasValidSource())) {
if (sfis != NULL) {
sfis[compiled_funcs_count] = Handle<SharedFunctionInfo>(sfi);
}
if (code_objects != NULL) {
code_objects[compiled_funcs_count] = Handle<Code>(sfi->code());
}
++compiled_funcs_count;
}
}
// Iterate all optimized functions in all contexts.
EnumerateOptimizedFunctionsVisitor visitor(sfis,
code_objects,
&compiled_funcs_count);
Deoptimizer::VisitAllOptimizedFunctions(&visitor);
return compiled_funcs_count;
}
void Logger::LogCodeObject(Object* object) {
if (FLAG_log_code) {
Code* code_object = Code::cast(object);
LogEventsAndTags tag = Logger::STUB_TAG;
const char* description = "Unknown code from the snapshot";
switch (code_object->kind()) {
case Code::FUNCTION:
case Code::OPTIMIZED_FUNCTION:
return; // We log this later using LogCompiledFunctions.
case Code::TYPE_RECORDING_BINARY_OP_IC: // fall through
case Code::COMPARE_IC: // fall through
case Code::STUB:
description =
CodeStub::MajorName(CodeStub::GetMajorKey(code_object), true);
if (description == NULL)
description = "A stub from the snapshot";
tag = Logger::STUB_TAG;
break;
case Code::BUILTIN:
description = "A builtin from the snapshot";
tag = Logger::BUILTIN_TAG;
break;
case Code::KEYED_LOAD_IC:
description = "A keyed load IC from the snapshot";
tag = Logger::KEYED_LOAD_IC_TAG;
break;
case Code::KEYED_EXTERNAL_ARRAY_LOAD_IC:
description = "A keyed external array load IC from the snapshot";
tag = Logger::KEYED_EXTERNAL_ARRAY_LOAD_IC_TAG;
break;
case Code::LOAD_IC:
description = "A load IC from the snapshot";
tag = Logger::LOAD_IC_TAG;
break;
case Code::STORE_IC:
description = "A store IC from the snapshot";
tag = Logger::STORE_IC_TAG;
break;
case Code::KEYED_STORE_IC:
description = "A keyed store IC from the snapshot";
tag = Logger::KEYED_STORE_IC_TAG;
break;
case Code::KEYED_EXTERNAL_ARRAY_STORE_IC:
description = "A keyed external array store IC from the snapshot";
tag = Logger::KEYED_EXTERNAL_ARRAY_STORE_IC_TAG;
break;
case Code::CALL_IC:
description = "A call IC from the snapshot";
tag = Logger::CALL_IC_TAG;
break;
case Code::KEYED_CALL_IC:
description = "A keyed call IC from the snapshot";
tag = Logger::KEYED_CALL_IC_TAG;
break;
}
PROFILE(ISOLATE, CodeCreateEvent(tag, code_object, description));
}
}
void Logger::LogCodeInfo() {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (!log_->IsEnabled() || !FLAG_log_code || !FLAG_ll_prof) return;
#if V8_TARGET_ARCH_IA32
const char arch[] = "ia32";
#elif V8_TARGET_ARCH_X64
const char arch[] = "x64";
#elif V8_TARGET_ARCH_ARM
const char arch[] = "arm";
#else
const char arch[] = "unknown";
#endif
LogMessageBuilder msg(this);
msg.Append("code-info,%s,%d\n", arch, Code::kHeaderSize);
msg.WriteToLogFile();
#endif // ENABLE_LOGGING_AND_PROFILING
}
void Logger::LowLevelCodeCreateEvent(Code* code, LogMessageBuilder* msg) {
if (!FLAG_ll_prof || log_->output_code_handle_ == NULL) return;
int pos = static_cast<int>(ftell(log_->output_code_handle_));
size_t rv = fwrite(code->instruction_start(), 1, code->instruction_size(),
log_->output_code_handle_);
ASSERT(static_cast<size_t>(code->instruction_size()) == rv);
USE(rv);
msg->Append(",%d", pos);
}
void Logger::LogCodeObjects() {
AssertNoAllocation no_alloc;
HeapIterator iterator;
for (HeapObject* obj = iterator.next(); obj != NULL; obj = iterator.next()) {
if (obj->IsCode()) LogCodeObject(obj);
}
}
void Logger::LogCompiledFunctions() {
HandleScope scope;
const int compiled_funcs_count = EnumerateCompiledFunctions(NULL, NULL);
ScopedVector< Handle<SharedFunctionInfo> > sfis(compiled_funcs_count);
ScopedVector< Handle<Code> > code_objects(compiled_funcs_count);
EnumerateCompiledFunctions(sfis.start(), code_objects.start());
// During iteration, there can be heap allocation due to
// GetScriptLineNumber call.
for (int i = 0; i < compiled_funcs_count; ++i) {
if (*code_objects[i] == Isolate::Current()->builtins()->builtin(
Builtins::kLazyCompile))
continue;
Handle<SharedFunctionInfo> shared = sfis[i];
Handle<String> func_name(shared->DebugName());
if (shared->script()->IsScript()) {
Handle<Script> script(Script::cast(shared->script()));
if (script->name()->IsString()) {
Handle<String> script_name(String::cast(script->name()));
int line_num = GetScriptLineNumber(script, shared->start_position());
if (line_num > 0) {
PROFILE(ISOLATE,
CodeCreateEvent(
Logger::ToNativeByScript(Logger::LAZY_COMPILE_TAG, *script),
*code_objects[i], *shared,
*script_name, line_num + 1));
} else {
// Can't distinguish eval and script here, so always use Script.
PROFILE(ISOLATE,
CodeCreateEvent(
Logger::ToNativeByScript(Logger::SCRIPT_TAG, *script),
*code_objects[i], *shared, *script_name));
}
} else {
PROFILE(ISOLATE,
CodeCreateEvent(
Logger::ToNativeByScript(Logger::LAZY_COMPILE_TAG, *script),
*code_objects[i], *shared, *func_name));
}
} else if (shared->IsApiFunction()) {
// API function.
FunctionTemplateInfo* fun_data = shared->get_api_func_data();
Object* raw_call_data = fun_data->call_code();
if (!raw_call_data->IsUndefined()) {
CallHandlerInfo* call_data = CallHandlerInfo::cast(raw_call_data);
Object* callback_obj = call_data->callback();
Address entry_point = v8::ToCData<Address>(callback_obj);
PROFILE(ISOLATE, CallbackEvent(*func_name, entry_point));
}
} else {
PROFILE(ISOLATE,
CodeCreateEvent(
Logger::LAZY_COMPILE_TAG, *code_objects[i],
*shared, *func_name));
}
}
}
void Logger::LogAccessorCallbacks() {
AssertNoAllocation no_alloc;
HeapIterator iterator;
i::Isolate* isolate = ISOLATE;
for (HeapObject* obj = iterator.next(); obj != NULL; obj = iterator.next()) {
if (!obj->IsAccessorInfo()) continue;
AccessorInfo* ai = AccessorInfo::cast(obj);
if (!ai->name()->IsString()) continue;
String* name = String::cast(ai->name());
Address getter_entry = v8::ToCData<Address>(ai->getter());
if (getter_entry != 0) {
PROFILE(isolate, GetterCallbackEvent(name, getter_entry));
}
Address setter_entry = v8::ToCData<Address>(ai->setter());
if (setter_entry != 0) {
PROFILE(isolate, SetterCallbackEvent(name, setter_entry));
}
}
}
#endif
bool Logger::Setup() {
#ifdef ENABLE_LOGGING_AND_PROFILING
// Tests and EnsureInitialize() can call this twice in a row. It's harmless.
if (is_initialized_) return true;
is_initialized_ = true;
// --ll-prof implies --log-code and --log-snapshot-positions.
if (FLAG_ll_prof) {
FLAG_log_code = true;
FLAG_log_snapshot_positions = true;
}
// --prof_lazy controls --log-code, implies --noprof_auto.
if (FLAG_prof_lazy) {
FLAG_log_code = false;
FLAG_prof_auto = false;
}
// TODO(isolates): this assert introduces cyclic dependency (logger
// -> thread local top -> heap -> logger).
// ASSERT(VMState::is_outermost_external());
log_->Initialize();
if (FLAG_ll_prof) LogCodeInfo();
ticker_ = new Ticker(Isolate::Current(), kSamplingIntervalMs);
Isolate* isolate = Isolate::Current();
if (FLAG_sliding_state_window && sliding_state_window_ == NULL) {
sliding_state_window_ = new SlidingStateWindow(isolate);
}
bool start_logging = FLAG_log || FLAG_log_runtime || FLAG_log_api
|| FLAG_log_code || FLAG_log_gc || FLAG_log_handles || FLAG_log_suspect
|| FLAG_log_regexp || FLAG_log_state_changes;
if (start_logging) {
logging_nesting_ = 1;
}
if (FLAG_prof) {
profiler_ = new Profiler(isolate);
if (!FLAG_prof_auto) {
profiler_->pause();
} else {
logging_nesting_ = 1;
}
if (!FLAG_prof_lazy) {
profiler_->Engage();
}
}
return true;
#else
return false;
#endif
}
Sampler* Logger::sampler() {
return ticker_;
}
void Logger::EnsureTickerStarted() {
#ifdef ENABLE_LOGGING_AND_PROFILING
ASSERT(ticker_ != NULL);
if (!ticker_->IsActive()) ticker_->Start();
#endif
}
void Logger::EnsureTickerStopped() {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (ticker_ != NULL && ticker_->IsActive()) ticker_->Stop();
#endif
}
void Logger::TearDown() {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (!is_initialized_) return;
is_initialized_ = false;
// Stop the profiler before closing the file.
if (profiler_ != NULL) {
profiler_->Disengage();
delete profiler_;
profiler_ = NULL;
}
delete sliding_state_window_;
sliding_state_window_ = NULL;
delete ticker_;
ticker_ = NULL;
log_->Close();
#endif
}
void Logger::EnableSlidingStateWindow() {
#ifdef ENABLE_LOGGING_AND_PROFILING
// If the ticker is NULL, Logger::Setup has not been called yet. In
// that case, we set the sliding_state_window flag so that the
// sliding window computation will be started when Logger::Setup is
// called.
if (ticker_ == NULL) {
FLAG_sliding_state_window = true;
return;
}
// Otherwise, if the sliding state window computation has not been
// started we do it now.
if (sliding_state_window_ == NULL) {
sliding_state_window_ = new SlidingStateWindow(Isolate::Current());
}
#endif
}
Mutex* SamplerRegistry::mutex_ = OS::CreateMutex();
List<Sampler*>* SamplerRegistry::active_samplers_ = NULL;
bool SamplerRegistry::IterateActiveSamplers(VisitSampler func, void* param) {
ScopedLock lock(mutex_);
for (int i = 0;
ActiveSamplersExist() && i < active_samplers_->length();
++i) {
func(active_samplers_->at(i), param);
}
return ActiveSamplersExist();
}
static void ComputeCpuProfiling(Sampler* sampler, void* flag_ptr) {
bool* flag = reinterpret_cast<bool*>(flag_ptr);
*flag |= sampler->IsProfiling();
}
SamplerRegistry::State SamplerRegistry::GetState() {
bool flag = false;
if (!IterateActiveSamplers(&ComputeCpuProfiling, &flag)) {
return HAS_NO_SAMPLERS;
}
return flag ? HAS_CPU_PROFILING_SAMPLERS : HAS_SAMPLERS;
}
void SamplerRegistry::AddActiveSampler(Sampler* sampler) {
ASSERT(sampler->IsActive());
ScopedLock lock(mutex_);
if (active_samplers_ == NULL) {
active_samplers_ = new List<Sampler*>;
} else {
ASSERT(!active_samplers_->Contains(sampler));
}
active_samplers_->Add(sampler);
}
void SamplerRegistry::RemoveActiveSampler(Sampler* sampler) {
ASSERT(sampler->IsActive());
ScopedLock lock(mutex_);
ASSERT(active_samplers_ != NULL);
bool removed = active_samplers_->RemoveElement(sampler);
ASSERT(removed);
USE(removed);
}
} } // namespace v8::internal