// Copyright 2011 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 "platform.h"
#include "runtime-profiler.h"
#include "serialize.h"
#include "string-stream.h"
#include "vm-state-inl.h"
namespace v8 {
namespace internal {
//
// 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; }
Isolate* isolate_;
// 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());
// 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("v8:Profiler"),
isolate_(isolate),
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);
while (running_) {
LOG(isolate_, TickEvent(&sample, overflow));
overflow = Remove(&sample);
}
}
// Low-level profiling event structures.
struct LowLevelCodeCreateStruct {
static const char kTag = 'C';
int32_t name_size;
Address code_address;
int32_t code_size;
};
struct LowLevelCodeMoveStruct {
static const char kTag = 'M';
Address from_address;
Address to_address;
};
struct LowLevelCodeDeleteStruct {
static const char kTag = 'D';
Address address;
};
struct LowLevelSnapshotPositionStruct {
static const char kTag = 'P';
Address address;
int32_t position;
};
static const char kCodeMovingGCTag = 'G';
//
// Logger class implementation.
//
class Logger::NameMap {
public:
NameMap() : impl_(&PointerEquals) {}
~NameMap() {
for (HashMap::Entry* p = impl_.Start(); p != NULL; p = impl_.Next(p)) {
DeleteArray(static_cast<const char*>(p->value));
}
}
void Insert(Address code_address, const char* name, int name_size) {
HashMap::Entry* entry = FindOrCreateEntry(code_address);
if (entry->value == NULL) {
entry->value = CopyName(name, name_size);
}
}
const char* Lookup(Address code_address) {
HashMap::Entry* entry = FindEntry(code_address);
return (entry != NULL) ? static_cast<const char*>(entry->value) : NULL;
}
void Remove(Address code_address) {
HashMap::Entry* entry = FindEntry(code_address);
if (entry != NULL) {
DeleteArray(static_cast<char*>(entry->value));
RemoveEntry(entry);
}
}
void Move(Address from, Address to) {
if (from == to) return;
HashMap::Entry* from_entry = FindEntry(from);
ASSERT(from_entry != NULL);
void* value = from_entry->value;
RemoveEntry(from_entry);
HashMap::Entry* to_entry = FindOrCreateEntry(to);
ASSERT(to_entry->value == NULL);
to_entry->value = value;
}
private:
static bool PointerEquals(void* lhs, void* rhs) {
return lhs == rhs;
}
static char* CopyName(const char* name, int name_size) {
char* result = NewArray<char>(name_size + 1);
for (int i = 0; i < name_size; ++i) {
char c = name[i];
if (c == '\0') c = ' ';
result[i] = c;
}
result[name_size] = '\0';
return result;
}
HashMap::Entry* FindOrCreateEntry(Address code_address) {
return impl_.Lookup(code_address, ComputePointerHash(code_address), true);
}
HashMap::Entry* FindEntry(Address code_address) {
return impl_.Lookup(code_address, ComputePointerHash(code_address), false);
}
void RemoveEntry(HashMap::Entry* entry) {
impl_.Remove(entry->key, entry->hash);
}
HashMap impl_;
DISALLOW_COPY_AND_ASSIGN(NameMap);
};
class Logger::NameBuffer {
public:
NameBuffer() { Reset(); }
void Reset() {
utf8_pos_ = 0;
}
void AppendString(String* str) {
if (str == NULL) return;
if (str->HasOnlyAsciiChars()) {
int utf8_length = Min(str->length(), kUtf8BufferSize - utf8_pos_);
String::WriteToFlat(str, utf8_buffer_ + utf8_pos_, 0, utf8_length);
utf8_pos_ += utf8_length;
return;
}
int uc16_length = Min(str->length(), kUtf16BufferSize);
String::WriteToFlat(str, utf16_buffer, 0, uc16_length);
int previous = unibrow::Utf16::kNoPreviousCharacter;
for (int i = 0; i < uc16_length && utf8_pos_ < kUtf8BufferSize; ++i) {
uc16 c = utf16_buffer[i];
if (c <= String::kMaxAsciiCharCodeU) {
utf8_buffer_[utf8_pos_++] = static_cast<char>(c);
} else {
int char_length = unibrow::Utf8::Length(c, previous);
if (utf8_pos_ + char_length > kUtf8BufferSize) break;
unibrow::Utf8::Encode(utf8_buffer_ + utf8_pos_, c, previous);
utf8_pos_ += char_length;
}
previous = c;
}
}
void AppendBytes(const char* bytes, int size) {
size = Min(size, kUtf8BufferSize - utf8_pos_);
memcpy(utf8_buffer_ + utf8_pos_, bytes, size);
utf8_pos_ += size;
}
void AppendBytes(const char* bytes) {
AppendBytes(bytes, StrLength(bytes));
}
void AppendByte(char c) {
if (utf8_pos_ >= kUtf8BufferSize) return;
utf8_buffer_[utf8_pos_++] = c;
}
void AppendInt(int n) {
Vector<char> buffer(utf8_buffer_ + utf8_pos_, kUtf8BufferSize - utf8_pos_);
int size = OS::SNPrintF(buffer, "%d", n);
if (size > 0 && utf8_pos_ + size <= kUtf8BufferSize) {
utf8_pos_ += size;
}
}
const char* get() { return utf8_buffer_; }
int size() const { return utf8_pos_; }
private:
static const int kUtf8BufferSize = 512;
static const int kUtf16BufferSize = 128;
int utf8_pos_;
char utf8_buffer_[kUtf8BufferSize];
uc16 utf16_buffer[kUtf16BufferSize];
};
Logger::Logger()
: ticker_(NULL),
profiler_(NULL),
sliding_state_window_(NULL),
log_events_(NULL),
logging_nesting_(0),
cpu_profiler_nesting_(0),
log_(new Log(this)),
name_buffer_(new NameBuffer),
address_to_name_map_(NULL),
is_initialized_(false),
last_address_(NULL),
prev_sp_(NULL),
prev_function_(NULL),
prev_to_(NULL),
prev_code_(NULL) {
}
Logger::~Logger() {
delete address_to_name_map_;
delete name_buffer_;
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();
}
void Logger::StringEvent(const char* name, const char* value) {
if (FLAG_log) UncheckedStringEvent(name, value);
}
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();
}
void Logger::IntEvent(const char* name, int value) {
if (FLAG_log) UncheckedIntEvent(name, value);
}
void Logger::IntPtrTEvent(const char* name, intptr_t value) {
if (FLAG_log) UncheckedIntPtrTEvent(name, value);
}
void Logger::UncheckedIntEvent(const char* name, int value) {
if (!log_->IsEnabled()) return;
LogMessageBuilder msg(this);
msg.Append("%s,%d\n", name, value);
msg.WriteToLogFile();
}
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();
}
void Logger::HandleEvent(const char* name, Object** location) {
if (!log_->IsEnabled() || !FLAG_log_handles) return;
LogMessageBuilder msg(this);
msg.Append("%s,0x%" V8PRIxPTR "\n", name, location);
msg.WriteToLogFile();
}
// 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();
}
void Logger::ApiNamedSecurityCheck(Object* key) {
if (!log_->IsEnabled() || !FLAG_log_api) return;
if (key->IsString()) {
SmartArrayPointer<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");
}
}
void Logger::SharedLibraryEvent(const char* library_path,
uintptr_t start,
uintptr_t end) {
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();
}
void Logger::SharedLibraryEvent(const wchar_t* library_path,
uintptr_t start,
uintptr_t end) {
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();
}
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();
}
void Logger::RegExpCompileEvent(Handle<JSRegExp> regexp, bool in_cache) {
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();
}
void Logger::LogRuntime(Vector<const char> format, JSArray* args) {
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();
}
void Logger::ApiIndexedSecurityCheck(uint32_t index) {
if (!log_->IsEnabled() || !FLAG_log_api) return;
ApiEvent("api,check-security,%u\n", index);
}
void Logger::ApiNamedPropertyAccess(const char* tag,
JSObject* holder,
Object* name) {
ASSERT(name->IsString());
if (!log_->IsEnabled() || !FLAG_log_api) return;
String* class_name_obj = holder->class_name();
SmartArrayPointer<char> class_name =
class_name_obj->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL);
SmartArrayPointer<char> property_name =
String::cast(name)->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL);
ApiEvent("api,%s,\"%s\",\"%s\"\n", tag, *class_name, *property_name);
}
void Logger::ApiIndexedPropertyAccess(const char* tag,
JSObject* holder,
uint32_t index) {
if (!log_->IsEnabled() || !FLAG_log_api) return;
String* class_name_obj = holder->class_name();
SmartArrayPointer<char> class_name =
class_name_obj->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL);
ApiEvent("api,%s,\"%s\",%u\n", tag, *class_name, index);
}
void Logger::ApiObjectAccess(const char* tag, JSObject* object) {
if (!log_->IsEnabled() || !FLAG_log_api) return;
String* class_name_obj = object->class_name();
SmartArrayPointer<char> class_name =
class_name_obj->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL);
ApiEvent("api,%s,\"%s\"\n", tag, *class_name);
}
void Logger::ApiEntryCall(const char* name) {
if (!log_->IsEnabled() || !FLAG_log_api) return;
ApiEvent("api,%s\n", name);
}
void Logger::NewEvent(const char* name, void* object, size_t size) {
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();
}
void Logger::DeleteEvent(const char* name, void* object) {
if (!log_->IsEnabled() || !FLAG_log) return;
LogMessageBuilder msg(this);
msg.Append("delete,%s,0x%" V8PRIxPTR "\n", name, object);
msg.WriteToLogFile();
}
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);
}
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();
}
void Logger::CallbackEvent(String* name, Address entry_point) {
if (!log_->IsEnabled() || !FLAG_log_code) return;
SmartArrayPointer<char> str =
name->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL);
CallbackEventInternal("", *str, entry_point);
}
void Logger::GetterCallbackEvent(String* name, Address entry_point) {
if (!log_->IsEnabled() || !FLAG_log_code) return;
SmartArrayPointer<char> str =
name->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL);
CallbackEventInternal("get ", *str, entry_point);
}
void Logger::SetterCallbackEvent(String* name, Address entry_point) {
if (!log_->IsEnabled() || !FLAG_log_code) return;
SmartArrayPointer<char> str =
name->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL);
CallbackEventInternal("set ", *str, entry_point);
}
void Logger::CodeCreateEvent(LogEventsAndTags tag,
Code* code,
const char* comment) {
if (!log_->IsEnabled()) return;
if (FLAG_ll_prof || Serializer::enabled()) {
name_buffer_->Reset();
name_buffer_->AppendBytes(kLogEventsNames[tag]);
name_buffer_->AppendByte(':');
name_buffer_->AppendBytes(comment);
}
if (FLAG_ll_prof) {
LowLevelCodeCreateEvent(code, name_buffer_->get(), name_buffer_->size());
}
if (Serializer::enabled()) {
RegisterSnapshotCodeName(code, name_buffer_->get(), name_buffer_->size());
}
if (!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('"');
msg.Append('\n');
msg.WriteToLogFile();
}
void Logger::CodeCreateEvent(LogEventsAndTags tag,
Code* code,
String* name) {
if (!log_->IsEnabled()) return;
if (FLAG_ll_prof || Serializer::enabled()) {
name_buffer_->Reset();
name_buffer_->AppendBytes(kLogEventsNames[tag]);
name_buffer_->AppendByte(':');
name_buffer_->AppendString(name);
}
if (FLAG_ll_prof) {
LowLevelCodeCreateEvent(code, name_buffer_->get(), name_buffer_->size());
}
if (Serializer::enabled()) {
RegisterSnapshotCodeName(code, name_buffer_->get(), name_buffer_->size());
}
if (!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());
msg.AppendDetailed(name, false);
msg.Append('"');
msg.Append('\n');
msg.WriteToLogFile();
}
// 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 "";
}
}
void Logger::CodeCreateEvent(LogEventsAndTags tag,
Code* code,
SharedFunctionInfo* shared,
String* name) {
if (!log_->IsEnabled()) return;
if (FLAG_ll_prof || Serializer::enabled()) {
name_buffer_->Reset();
name_buffer_->AppendBytes(kLogEventsNames[tag]);
name_buffer_->AppendByte(':');
name_buffer_->AppendBytes(ComputeMarker(code));
name_buffer_->AppendString(name);
}
if (FLAG_ll_prof) {
LowLevelCodeCreateEvent(code, name_buffer_->get(), name_buffer_->size());
}
if (Serializer::enabled()) {
RegisterSnapshotCodeName(code, name_buffer_->get(), name_buffer_->size());
}
if (!FLAG_log_code) return;
if (code == Isolate::Current()->builtins()->builtin(
Builtins::kLazyCompile))
return;
LogMessageBuilder msg(this);
SmartArrayPointer<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));
msg.Append('\n');
msg.WriteToLogFile();
}
// 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) {
if (!log_->IsEnabled()) return;
if (FLAG_ll_prof || Serializer::enabled()) {
name_buffer_->Reset();
name_buffer_->AppendBytes(kLogEventsNames[tag]);
name_buffer_->AppendByte(':');
name_buffer_->AppendBytes(ComputeMarker(code));
name_buffer_->AppendString(shared->DebugName());
name_buffer_->AppendByte(' ');
name_buffer_->AppendString(source);
name_buffer_->AppendByte(':');
name_buffer_->AppendInt(line);
}
if (FLAG_ll_prof) {
LowLevelCodeCreateEvent(code, name_buffer_->get(), name_buffer_->size());
}
if (Serializer::enabled()) {
RegisterSnapshotCodeName(code, name_buffer_->get(), name_buffer_->size());
}
if (!FLAG_log_code) return;
LogMessageBuilder msg(this);
SmartArrayPointer<char> name =
shared->DebugName()->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL);
SmartArrayPointer<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));
msg.Append('\n');
msg.WriteToLogFile();
}
void Logger::CodeCreateEvent(LogEventsAndTags tag, Code* code, int args_count) {
if (!log_->IsEnabled()) return;
if (FLAG_ll_prof || Serializer::enabled()) {
name_buffer_->Reset();
name_buffer_->AppendBytes(kLogEventsNames[tag]);
name_buffer_->AppendByte(':');
name_buffer_->AppendInt(args_count);
}
if (FLAG_ll_prof) {
LowLevelCodeCreateEvent(code, name_buffer_->get(), name_buffer_->size());
}
if (Serializer::enabled()) {
RegisterSnapshotCodeName(code, name_buffer_->get(), name_buffer_->size());
}
if (!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);
msg.Append('\n');
msg.WriteToLogFile();
}
void Logger::CodeMovingGCEvent() {
if (!log_->IsEnabled() || !FLAG_ll_prof) return;
LowLevelLogWriteBytes(&kCodeMovingGCTag, sizeof(kCodeMovingGCTag));
OS::SignalCodeMovingGC();
}
void Logger::RegExpCodeCreateEvent(Code* code, String* source) {
if (!log_->IsEnabled()) return;
if (FLAG_ll_prof || Serializer::enabled()) {
name_buffer_->Reset();
name_buffer_->AppendBytes(kLogEventsNames[REG_EXP_TAG]);
name_buffer_->AppendByte(':');
name_buffer_->AppendString(source);
}
if (FLAG_ll_prof) {
LowLevelCodeCreateEvent(code, name_buffer_->get(), name_buffer_->size());
}
if (Serializer::enabled()) {
RegisterSnapshotCodeName(code, name_buffer_->get(), name_buffer_->size());
}
if (!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('\"');
msg.Append('\n');
msg.WriteToLogFile();
}
void Logger::CodeMoveEvent(Address from, Address to) {
if (!log_->IsEnabled()) return;
if (FLAG_ll_prof) LowLevelCodeMoveEvent(from, to);
if (Serializer::enabled() && address_to_name_map_ != NULL) {
address_to_name_map_->Move(from, to);
}
MoveEventInternal(CODE_MOVE_EVENT, from, to);
}
void Logger::CodeDeleteEvent(Address from) {
if (!log_->IsEnabled()) return;
if (FLAG_ll_prof) LowLevelCodeDeleteEvent(from);
if (Serializer::enabled() && address_to_name_map_ != NULL) {
address_to_name_map_->Remove(from);
}
DeleteEventInternal(CODE_DELETE_EVENT, from);
}
void Logger::SnapshotPositionEvent(Address addr, int pos) {
if (!log_->IsEnabled()) return;
if (FLAG_ll_prof) LowLevelSnapshotPositionEvent(addr, pos);
if (Serializer::enabled() && address_to_name_map_ != NULL) {
const char* code_name = address_to_name_map_->Lookup(addr);
if (code_name == NULL) return; // Not a code object.
LogMessageBuilder msg(this);
msg.Append("%s,%d,\"", kLogEventsNames[SNAPSHOT_CODE_NAME_EVENT], pos);
for (const char* p = code_name; *p != '\0'; ++p) {
if (*p == '"') msg.Append('\\');
msg.Append(*p);
}
msg.Append("\"\n");
msg.WriteToLogFile();
}
if (!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();
}
void Logger::SharedFunctionInfoMoveEvent(Address from, Address to) {
MoveEventInternal(SHARED_FUNC_MOVE_EVENT, from, to);
}
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();
}
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();
}
void Logger::ResourceEvent(const char* name, const char* tag) {
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();
}
void Logger::SuspectReadEvent(String* name, Object* obj) {
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();
}
void Logger::HeapSampleBeginEvent(const char* space, const char* kind) {
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();
}
void Logger::HeapSampleEndEvent(const char* space, const char* kind) {
if (!log_->IsEnabled() || !FLAG_log_gc) return;
LogMessageBuilder msg(this);
msg.Append("heap-sample-end,\"%s\",\"%s\"\n", space, kind);
msg.WriteToLogFile();
}
void Logger::HeapSampleItemEvent(const char* type, int number, int bytes) {
if (!log_->IsEnabled() || !FLAG_log_gc) return;
LogMessageBuilder msg(this);
msg.Append("heap-sample-item,%s,%d,%d\n", type, number, bytes);
msg.WriteToLogFile();
}
void Logger::DebugTag(const char* call_site_tag) {
if (!log_->IsEnabled() || !FLAG_log) return;
LogMessageBuilder msg(this);
msg.Append("debug-tag,%s\n", call_site_tag);
msg.WriteToLogFile();
}
void Logger::DebugEvent(const char* event_type, Vector<uint16_t> parameter) {
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();
}
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();
}
bool Logger::IsProfilerPaused() {
return profiler_ == NULL || profiler_->paused();
}
void Logger::PauseProfiler() {
if (!log_->IsEnabled()) return;
if (profiler_ != NULL) {
// 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;
LOG(ISOLATE, UncheckedStringEvent("profiler", "pause"));
}
--logging_nesting_;
}
}
}
void Logger::ResumeProfiler() {
if (!log_->IsEnabled()) return;
if (profiler_ != NULL) {
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();
}
}
}
// This function can be called when Log's mutex is acquired,
// either from main or Profiler's thread.
void Logger::LogFailure() {
PauseProfiler();
}
bool Logger::IsProfilerSamplerActive() {
return ticker_->IsActive();
}
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) {
SharedFunctionInfo* sfi = SharedFunctionInfo::cast(function->shared());
Object* maybe_script = sfi->script();
if (maybe_script->IsScript()
&& !Script::cast(maybe_script)->HasValidSource()) return;
if (sfis_ != NULL) {
sfis_[*count_] = Handle<SharedFunctionInfo>(sfi);
}
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) {
HeapIterator iterator;
AssertNoAllocation no_alloc;
int compiled_funcs_count = 0;
// Iterate the heap to find shared function info objects and record
// the unoptimized code for them.
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 || FLAG_ll_prof) {
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::UNARY_OP_IC: // fall through
case Code::BINARY_OP_IC: // fall through
case Code::COMPARE_IC: // fall through
case Code::TO_BOOLEAN_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::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::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() {
if (!log_->IsEnabled() || !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";
#elif V8_TARGET_ARCH_MIPS
const char arch[] = "mips";
#else
const char arch[] = "unknown";
#endif
LowLevelLogWriteBytes(arch, sizeof(arch));
}
void Logger::RegisterSnapshotCodeName(Code* code,
const char* name,
int name_size) {
ASSERT(Serializer::enabled());
if (address_to_name_map_ == NULL) {
address_to_name_map_ = new NameMap;
}
address_to_name_map_->Insert(code->address(), name, name_size);
}
void Logger::LowLevelCodeCreateEvent(Code* code,
const char* name,
int name_size) {
if (log_->ll_output_handle_ == NULL) return;
LowLevelCodeCreateStruct event;
event.name_size = name_size;
event.code_address = code->instruction_start();
ASSERT(event.code_address == code->address() + Code::kHeaderSize);
event.code_size = code->instruction_size();
LowLevelLogWriteStruct(event);
LowLevelLogWriteBytes(name, name_size);
LowLevelLogWriteBytes(
reinterpret_cast<const char*>(code->instruction_start()),
code->instruction_size());
}
void Logger::LowLevelCodeMoveEvent(Address from, Address to) {
if (log_->ll_output_handle_ == NULL) return;
LowLevelCodeMoveStruct event;
event.from_address = from + Code::kHeaderSize;
event.to_address = to + Code::kHeaderSize;
LowLevelLogWriteStruct(event);
}
void Logger::LowLevelCodeDeleteEvent(Address from) {
if (log_->ll_output_handle_ == NULL) return;
LowLevelCodeDeleteStruct event;
event.address = from + Code::kHeaderSize;
LowLevelLogWriteStruct(event);
}
void Logger::LowLevelSnapshotPositionEvent(Address addr, int pos) {
if (log_->ll_output_handle_ == NULL) return;
LowLevelSnapshotPositionStruct event;
event.address = addr + Code::kHeaderSize;
event.position = pos;
LowLevelLogWriteStruct(event);
}
void Logger::LowLevelLogWriteBytes(const char* bytes, int size) {
size_t rv = fwrite(bytes, 1, size, log_->ll_output_handle_);
ASSERT(static_cast<size_t>(size) == rv);
USE(rv);
}
void Logger::LogCodeObjects() {
HEAP->CollectAllGarbage(Heap::kMakeHeapIterableMask,
"Logger::LogCodeObjects");
HeapIterator iterator;
AssertNoAllocation no_alloc;
for (HeapObject* obj = iterator.next(); obj != NULL; obj = iterator.next()) {
if (obj->IsCode()) LogCodeObject(obj);
}
}
void Logger::LogExistingFunction(Handle<SharedFunctionInfo> shared,
Handle<Code> code) {
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, *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, *shared, *script_name));
}
} else {
PROFILE(ISOLATE,
CodeCreateEvent(
Logger::ToNativeByScript(Logger::LAZY_COMPILE_TAG, *script),
*code, *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, *shared, *func_name));
}
}
void Logger::LogCompiledFunctions() {
HEAP->CollectAllGarbage(Heap::kMakeHeapIterableMask,
"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;
LogExistingFunction(sfis[i], code_objects[i]);
}
}
void Logger::LogAccessorCallbacks() {
HEAP->CollectAllGarbage(Heap::kMakeHeapIterableMask,
"Logger::LogAccessorCallbacks");
HeapIterator iterator;
AssertNoAllocation no_alloc;
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));
}
}
}
bool Logger::SetUp() {
// 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_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();
Isolate* isolate = Isolate::Current();
ticker_ = new Ticker(isolate, kSamplingIntervalMs);
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 || FLAG_ll_prof;
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;
}
Sampler* Logger::sampler() {
return ticker_;
}
void Logger::EnsureTickerStarted() {
ASSERT(ticker_ != NULL);
if (!ticker_->IsActive()) ticker_->Start();
}
void Logger::EnsureTickerStopped() {
if (ticker_ != NULL && ticker_->IsActive()) ticker_->Stop();
}
FILE* Logger::TearDown() {
if (!is_initialized_) return NULL;
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;
return log_->Close();
}
void Logger::EnableSlidingStateWindow() {
// 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());
}
}
// Protects the state below.
static LazyMutex active_samplers_mutex = LAZY_MUTEX_INITIALIZER;
List<Sampler*>* SamplerRegistry::active_samplers_ = NULL;
bool SamplerRegistry::IterateActiveSamplers(VisitSampler func, void* param) {
ScopedLock lock(active_samplers_mutex.Pointer());
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(active_samplers_mutex.Pointer());
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(active_samplers_mutex.Pointer());
ASSERT(active_samplers_ != NULL);
bool removed = active_samplers_->RemoveElement(sampler);
ASSERT(removed);
USE(removed);
}
} } // namespace v8::internal