v8/test/cctest/test-log.cc

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// Copyright 2006-2009 the V8 project authors. All rights reserved.
//
// Tests of logging functions from log.h
#ifdef __linux__
#include <math.h>
#include <pthread.h>
#include <signal.h>
#include <unistd.h>
#endif // __linux__
#include "v8.h"
#include "log.h"
#include "cpu-profiler.h"
#include "v8threads.h"
#include "cctest.h"
#include "vm-state-inl.h"
using v8::internal::Address;
using v8::internal::EmbeddedVector;
using v8::internal::Logger;
using v8::internal::StrLength;
namespace i = v8::internal;
static void SetUp() {
// Log to memory buffer.
i::FLAG_logfile = "*";
i::FLAG_log = true;
LOGGER->Setup();
}
static void TearDown() {
LOGGER->TearDown();
}
TEST(EmptyLog) {
SetUp();
CHECK_EQ(0, LOGGER->GetLogLines(0, NULL, 0));
CHECK_EQ(0, LOGGER->GetLogLines(100, NULL, 0));
CHECK_EQ(0, LOGGER->GetLogLines(0, NULL, 100));
CHECK_EQ(0, LOGGER->GetLogLines(100, NULL, 100));
TearDown();
}
TEST(GetMessages) {
SetUp();
LOGGER->StringEvent("aaa", "bbb");
LOGGER->StringEvent("cccc", "dddd");
CHECK_EQ(0, LOGGER->GetLogLines(0, NULL, 0));
char log_lines[100];
memset(log_lines, 0, sizeof(log_lines));
// See Logger::StringEvent.
const char* line_1 = "aaa,\"bbb\"\n";
const int line_1_len = StrLength(line_1);
// The exact size.
CHECK_EQ(line_1_len, LOGGER->GetLogLines(0, log_lines, line_1_len));
CHECK_EQ(line_1, log_lines);
memset(log_lines, 0, sizeof(log_lines));
// A bit more than the first line length.
CHECK_EQ(line_1_len, LOGGER->GetLogLines(0, log_lines, line_1_len + 3));
log_lines[line_1_len] = '\0';
CHECK_EQ(line_1, log_lines);
memset(log_lines, 0, sizeof(log_lines));
const char* line_2 = "cccc,\"dddd\"\n";
const int line_2_len = StrLength(line_2);
// Now start with line_2 beginning.
CHECK_EQ(0, LOGGER->GetLogLines(line_1_len, log_lines, 0));
CHECK_EQ(line_2_len, LOGGER->GetLogLines(line_1_len, log_lines, line_2_len));
CHECK_EQ(line_2, log_lines);
memset(log_lines, 0, sizeof(log_lines));
CHECK_EQ(line_2_len,
LOGGER->GetLogLines(line_1_len, log_lines, line_2_len + 3));
CHECK_EQ(line_2, log_lines);
memset(log_lines, 0, sizeof(log_lines));
// Now get entire buffer contents.
const char* all_lines = "aaa,\"bbb\"\ncccc,\"dddd\"\n";
const int all_lines_len = StrLength(all_lines);
CHECK_EQ(all_lines_len, LOGGER->GetLogLines(0, log_lines, all_lines_len));
CHECK_EQ(all_lines, log_lines);
memset(log_lines, 0, sizeof(log_lines));
CHECK_EQ(all_lines_len, LOGGER->GetLogLines(0, log_lines, all_lines_len + 3));
CHECK_EQ(all_lines, log_lines);
memset(log_lines, 0, sizeof(log_lines));
TearDown();
}
static int GetLogLines(int start_pos, i::Vector<char>* buffer) {
return LOGGER->GetLogLines(start_pos, buffer->start(), buffer->length());
}
TEST(BeyondWritePosition) {
SetUp();
LOGGER->StringEvent("aaa", "bbb");
LOGGER->StringEvent("cccc", "dddd");
// See Logger::StringEvent.
const char* all_lines = "aaa,\"bbb\"\ncccc,\"dddd\"\n";
const int all_lines_len = StrLength(all_lines);
EmbeddedVector<char, 100> buffer;
const int beyond_write_pos = all_lines_len;
CHECK_EQ(0, LOGGER->GetLogLines(beyond_write_pos, buffer.start(), 1));
CHECK_EQ(0, GetLogLines(beyond_write_pos, &buffer));
CHECK_EQ(0, LOGGER->GetLogLines(beyond_write_pos + 1, buffer.start(), 1));
CHECK_EQ(0, GetLogLines(beyond_write_pos + 1, &buffer));
CHECK_EQ(0, LOGGER->GetLogLines(beyond_write_pos + 100, buffer.start(), 1));
CHECK_EQ(0, GetLogLines(beyond_write_pos + 100, &buffer));
CHECK_EQ(0, LOGGER->GetLogLines(10 * 1024 * 1024, buffer.start(), 1));
CHECK_EQ(0, GetLogLines(10 * 1024 * 1024, &buffer));
TearDown();
}
TEST(MemoryLoggingTurnedOff) {
// Log to stdout
i::FLAG_logfile = "-";
i::FLAG_log = true;
LOGGER->Setup();
CHECK_EQ(0, LOGGER->GetLogLines(0, NULL, 0));
CHECK_EQ(0, LOGGER->GetLogLines(100, NULL, 0));
CHECK_EQ(0, LOGGER->GetLogLines(0, NULL, 100));
CHECK_EQ(0, LOGGER->GetLogLines(100, NULL, 100));
LOGGER->TearDown();
}
static void CompileAndRunScript(const char *src) {
v8::Script::Compile(v8::String::New(src))->Run();
}
namespace v8 {
namespace internal {
class LoggerTestHelper : public AllStatic {
public:
static bool IsSamplerActive() { return LOGGER->IsProfilerSamplerActive(); }
static void ResetSamplesTaken() {
reinterpret_cast<Sampler*>(LOGGER->ticker_)->ResetSamplesTaken();
}
static bool has_samples_taken() {
return reinterpret_cast<Sampler*>(LOGGER->ticker_)->samples_taken() > 0;
}
};
} // namespace v8::internal
} // namespace v8
using v8::internal::LoggerTestHelper;
namespace {
class ScopedLoggerInitializer {
public:
explicit ScopedLoggerInitializer(bool prof_lazy)
: saved_prof_lazy_(i::FLAG_prof_lazy),
saved_prof_(i::FLAG_prof),
saved_prof_auto_(i::FLAG_prof_auto),
trick_to_run_init_flags_(init_flags_(prof_lazy)),
need_to_set_up_logger_(i::V8::IsRunning()),
scope_(),
env_(v8::Context::New()) {
if (need_to_set_up_logger_) LOGGER->Setup();
env_->Enter();
}
~ScopedLoggerInitializer() {
env_->Exit();
LOGGER->TearDown();
i::FLAG_prof_lazy = saved_prof_lazy_;
i::FLAG_prof = saved_prof_;
i::FLAG_prof_auto = saved_prof_auto_;
}
v8::Handle<v8::Context>& env() { return env_; }
private:
static bool init_flags_(bool prof_lazy) {
i::FLAG_prof = true;
i::FLAG_prof_lazy = prof_lazy;
i::FLAG_prof_auto = false;
i::FLAG_logfile = "*";
return prof_lazy;
}
const bool saved_prof_lazy_;
const bool saved_prof_;
const bool saved_prof_auto_;
const bool trick_to_run_init_flags_;
const bool need_to_set_up_logger_;
v8::HandleScope scope_;
v8::Handle<v8::Context> env_;
DISALLOW_COPY_AND_ASSIGN(ScopedLoggerInitializer);
};
class LogBufferMatcher {
public:
LogBufferMatcher() {
// Skip all initially logged stuff.
log_pos_ = GetLogLines(0, &buffer_);
}
int log_pos() { return log_pos_; }
int GetNextChunk() {
int chunk_size = GetLogLines(log_pos_, &buffer_);
CHECK_GT(buffer_.length(), chunk_size);
buffer_[chunk_size] = '\0';
log_pos_ += chunk_size;
return chunk_size;
}
const char* Find(const char* substr) {
return strstr(buffer_.start(), substr);
}
const char* Find(const i::Vector<char>& substr) {
return Find(substr.start());
}
bool IsInSequence(const char* s1, const char* s2) {
const char* s1_pos = Find(s1);
const char* s2_pos = Find(s2);
CHECK_NE(NULL, s1_pos);
CHECK_NE(NULL, s2_pos);
return s1_pos < s2_pos;
}
void PrintBuffer() {
puts(buffer_.start());
}
private:
EmbeddedVector<char, 102400> buffer_;
int log_pos_;
};
} // namespace
static void CheckThatProfilerWorks(LogBufferMatcher* matcher) {
CHECK(i::RuntimeProfiler::IsEnabled() ||
!LoggerTestHelper::IsSamplerActive());
LoggerTestHelper::ResetSamplesTaken();
LOGGER->ResumeProfiler();
CHECK(LoggerTestHelper::IsSamplerActive());
// Verify that the current map of compiled functions has been logged.
CHECK_GT(matcher->GetNextChunk(), 0);
const char* code_creation = "\ncode-creation,"; // eq. to /^code-creation,/
CHECK_NE(NULL, matcher->Find(code_creation));
// Force compiler to generate new code by parametrizing source.
EmbeddedVector<char, 100> script_src;
i::OS::SNPrintF(script_src,
"function f%d(x) { return %d * x; }"
"for (var i = 0; i < 10000; ++i) { f%d(i); }",
matcher->log_pos(), matcher->log_pos(), matcher->log_pos());
// Run code for 200 msecs to get some ticks.
const double end_time = i::OS::TimeCurrentMillis() + 200;
while (i::OS::TimeCurrentMillis() < end_time) {
CompileAndRunScript(script_src.start());
// Yield CPU to give Profiler thread a chance to process ticks.
i::OS::Sleep(1);
}
LOGGER->PauseProfiler();
CHECK(i::RuntimeProfiler::IsEnabled() ||
!LoggerTestHelper::IsSamplerActive());
// Wait 50 msecs to allow Profiler thread to process the last
// tick sample it has got.
i::OS::Sleep(50);
// Now we must have compiler and tick records.
CHECK_GT(matcher->GetNextChunk(), 0);
matcher->PrintBuffer();
CHECK_NE(NULL, matcher->Find(code_creation));
const char* tick = "\ntick,";
const bool ticks_found = matcher->Find(tick) != NULL;
CHECK_EQ(LoggerTestHelper::has_samples_taken(), ticks_found);
}
TEST(ProfLazyMode) {
ScopedLoggerInitializer initialize_logger(true);
if (!i::V8::UseCrankshaft()) return;
// No sampling should happen prior to resuming profiler unless we
// are runtime profiling.
CHECK(i::RuntimeProfiler::IsEnabled() ||
!LoggerTestHelper::IsSamplerActive());
LogBufferMatcher matcher;
// Nothing must be logged until profiling is resumed.
CHECK_EQ(0, matcher.log_pos());
CompileAndRunScript("var a = (function(x) { return x + 1; })(10);");
// Nothing must be logged while profiling is suspended.
CHECK_EQ(0, matcher.GetNextChunk());
CheckThatProfilerWorks(&matcher);
CompileAndRunScript("var a = (function(x) { return x + 1; })(10);");
// No new data beyond last retrieved position.
CHECK_EQ(0, matcher.GetNextChunk());
// Check that profiling can be resumed again.
CheckThatProfilerWorks(&matcher);
}
// BUG(913). Need to implement support for profiling multiple VM threads.
#if 0
namespace {
class LoopingThread : public v8::internal::Thread {
public:
explicit LoopingThread(v8::internal::Isolate* isolate)
: v8::internal::Thread(isolate),
semaphore_(v8::internal::OS::CreateSemaphore(0)),
run_(true) {
}
virtual ~LoopingThread() { delete semaphore_; }
void Run() {
self_ = pthread_self();
RunLoop();
}
void SendSigProf() { pthread_kill(self_, SIGPROF); }
void Stop() { run_ = false; }
bool WaitForRunning() { return semaphore_->Wait(1000000); }
protected:
bool IsRunning() { return run_; }
virtual void RunLoop() = 0;
void SetV8ThreadId() {
v8_thread_id_ = v8::V8::GetCurrentThreadId();
}
void SignalRunning() { semaphore_->Signal(); }
private:
v8::internal::Semaphore* semaphore_;
bool run_;
pthread_t self_;
int v8_thread_id_;
};
class LoopingJsThread : public LoopingThread {
public:
explicit LoopingJsThread(v8::internal::Isolate* isolate)
: LoopingThread(isolate) { }
void RunLoop() {
v8::Locker locker;
CHECK(i::Isolate::Current() != NULL);
CHECK_GT(i::Isolate::Current()->thread_manager()->CurrentId(), 0);
SetV8ThreadId();
while (IsRunning()) {
v8::HandleScope scope;
v8::Persistent<v8::Context> context = v8::Context::New();
CHECK(!context.IsEmpty());
{
v8::Context::Scope context_scope(context);
SignalRunning();
CompileAndRunScript(
"var j; for (var i=0; i<10000; ++i) { j = Math.sin(i); }");
}
context.Dispose();
i::OS::Sleep(1);
}
}
};
class LoopingNonJsThread : public LoopingThread {
public:
explicit LoopingNonJsThread(v8::internal::Isolate* isolate)
: LoopingThread(isolate) { }
void RunLoop() {
v8::Locker locker;
v8::Unlocker unlocker;
// Now thread has V8's id, but will not run VM code.
CHECK(i::Isolate::Current() != NULL);
CHECK_GT(i::Isolate::Current()->thread_manager()->CurrentId(), 0);
double i = 10;
SignalRunning();
while (IsRunning()) {
i = sin(i);
i::OS::Sleep(1);
}
}
};
class TestSampler : public v8::internal::Sampler {
public:
explicit TestSampler(v8::internal::Isolate* isolate)
: Sampler(isolate, 0, true, true),
semaphore_(v8::internal::OS::CreateSemaphore(0)),
was_sample_stack_called_(false) {
}
~TestSampler() { delete semaphore_; }
void SampleStack(v8::internal::TickSample*) {
was_sample_stack_called_ = true;
}
void Tick(v8::internal::TickSample*) { semaphore_->Signal(); }
bool WaitForTick() { return semaphore_->Wait(1000000); }
void Reset() { was_sample_stack_called_ = false; }
bool WasSampleStackCalled() { return was_sample_stack_called_; }
private:
v8::internal::Semaphore* semaphore_;
bool was_sample_stack_called_;
};
} // namespace
TEST(ProfMultipleThreads) {
TestSampler* sampler = NULL;
{
v8::Locker locker;
sampler = new TestSampler(v8::internal::Isolate::Current());
sampler->Start();
CHECK(sampler->IsActive());
}
LoopingJsThread jsThread(v8::internal::Isolate::Current());
jsThread.Start();
LoopingNonJsThread nonJsThread(v8::internal::Isolate::Current());
nonJsThread.Start();
CHECK(!sampler->WasSampleStackCalled());
jsThread.WaitForRunning();
jsThread.SendSigProf();
CHECK(sampler->WaitForTick());
CHECK(sampler->WasSampleStackCalled());
sampler->Reset();
CHECK(!sampler->WasSampleStackCalled());
nonJsThread.WaitForRunning();
nonJsThread.SendSigProf();
CHECK(!sampler->WaitForTick());
CHECK(!sampler->WasSampleStackCalled());
sampler->Stop();
jsThread.Stop();
nonJsThread.Stop();
jsThread.Join();
nonJsThread.Join();
delete sampler;
}
#endif // __linux__
// Test for issue http://crbug.com/23768 in Chromium.
// Heap can contain scripts with already disposed external sources.
// We need to verify that LogCompiledFunctions doesn't crash on them.
namespace {
class SimpleExternalString : public v8::String::ExternalStringResource {
public:
explicit SimpleExternalString(const char* source)
: utf_source_(StrLength(source)) {
for (int i = 0; i < utf_source_.length(); ++i)
utf_source_[i] = source[i];
}
virtual ~SimpleExternalString() {}
virtual size_t length() const { return utf_source_.length(); }
virtual const uint16_t* data() const { return utf_source_.start(); }
private:
i::ScopedVector<uint16_t> utf_source_;
};
} // namespace
TEST(Issue23768) {
v8::HandleScope scope;
v8::Handle<v8::Context> env = v8::Context::New();
env->Enter();
SimpleExternalString source_ext_str("(function ext() {})();");
v8::Local<v8::String> source = v8::String::NewExternal(&source_ext_str);
// Script needs to have a name in order to trigger InitLineEnds execution.
v8::Handle<v8::String> origin = v8::String::New("issue-23768-test");
v8::Handle<v8::Script> evil_script = v8::Script::Compile(source, origin);
CHECK(!evil_script.IsEmpty());
CHECK(!evil_script->Run().IsEmpty());
i::Handle<i::ExternalTwoByteString> i_source(
i::ExternalTwoByteString::cast(*v8::Utils::OpenHandle(*source)));
// This situation can happen if source was an external string disposed
// by its owner.
i_source->set_resource(NULL);
// Must not crash.
LOGGER->LogCompiledFunctions();
}
static v8::Handle<v8::Value> ObjMethod1(const v8::Arguments& args) {
return v8::Handle<v8::Value>();
}
TEST(LogCallbacks) {
ScopedLoggerInitializer initialize_logger(false);
LogBufferMatcher matcher;
v8::Persistent<v8::FunctionTemplate> obj =
v8::Persistent<v8::FunctionTemplate>::New(v8::FunctionTemplate::New());
obj->SetClassName(v8::String::New("Obj"));
v8::Handle<v8::ObjectTemplate> proto = obj->PrototypeTemplate();
v8::Local<v8::Signature> signature = v8::Signature::New(obj);
proto->Set(v8::String::New("method1"),
v8::FunctionTemplate::New(ObjMethod1,
v8::Handle<v8::Value>(),
signature),
static_cast<v8::PropertyAttribute>(v8::DontDelete));
initialize_logger.env()->Global()->Set(v8_str("Obj"), obj->GetFunction());
CompileAndRunScript("Obj.prototype.method1.toString();");
LOGGER->LogCompiledFunctions();
CHECK_GT(matcher.GetNextChunk(), 0);
const char* callback_rec = "code-creation,Callback,";
char* pos = const_cast<char*>(matcher.Find(callback_rec));
CHECK_NE(NULL, pos);
pos += strlen(callback_rec);
EmbeddedVector<char, 100> ref_data;
i::OS::SNPrintF(ref_data,
"0x%" V8PRIxPTR ",1,\"method1\"", ObjMethod1);
*(pos + strlen(ref_data.start())) = '\0';
CHECK_EQ(ref_data.start(), pos);
obj.Dispose();
}
static v8::Handle<v8::Value> Prop1Getter(v8::Local<v8::String> property,
const v8::AccessorInfo& info) {
return v8::Handle<v8::Value>();
}
static void Prop1Setter(v8::Local<v8::String> property,
v8::Local<v8::Value> value,
const v8::AccessorInfo& info) {
}
static v8::Handle<v8::Value> Prop2Getter(v8::Local<v8::String> property,
const v8::AccessorInfo& info) {
return v8::Handle<v8::Value>();
}
TEST(LogAccessorCallbacks) {
ScopedLoggerInitializer initialize_logger(false);
LogBufferMatcher matcher;
v8::Persistent<v8::FunctionTemplate> obj =
v8::Persistent<v8::FunctionTemplate>::New(v8::FunctionTemplate::New());
obj->SetClassName(v8::String::New("Obj"));
v8::Handle<v8::ObjectTemplate> inst = obj->InstanceTemplate();
inst->SetAccessor(v8::String::New("prop1"), Prop1Getter, Prop1Setter);
inst->SetAccessor(v8::String::New("prop2"), Prop2Getter);
LOGGER->LogAccessorCallbacks();
CHECK_GT(matcher.GetNextChunk(), 0);
matcher.PrintBuffer();
EmbeddedVector<char, 100> prop1_getter_record;
i::OS::SNPrintF(prop1_getter_record,
"code-creation,Callback,0x%" V8PRIxPTR ",1,\"get prop1\"",
Prop1Getter);
CHECK_NE(NULL, matcher.Find(prop1_getter_record));
EmbeddedVector<char, 100> prop1_setter_record;
i::OS::SNPrintF(prop1_setter_record,
"code-creation,Callback,0x%" V8PRIxPTR ",1,\"set prop1\"",
Prop1Setter);
CHECK_NE(NULL, matcher.Find(prop1_setter_record));
EmbeddedVector<char, 100> prop2_getter_record;
i::OS::SNPrintF(prop2_getter_record,
"code-creation,Callback,0x%" V8PRIxPTR ",1,\"get prop2\"",
Prop2Getter);
CHECK_NE(NULL, matcher.Find(prop2_getter_record));
obj.Dispose();
}
TEST(IsLoggingPreserved) {
ScopedLoggerInitializer initialize_logger(false);
CHECK(LOGGER->is_logging());
LOGGER->ResumeProfiler();
CHECK(LOGGER->is_logging());
LOGGER->PauseProfiler();
CHECK(LOGGER->is_logging());
}
static inline bool IsStringEqualTo(const char* r, const char* s) {
return strncmp(r, s, strlen(r)) == 0;
}
static bool Consume(const char* str, char** buf) {
if (IsStringEqualTo(str, *buf)) {
*buf += strlen(str);
return true;
}
return false;
}
namespace {
// A code entity is a pointer to a position of code-creation event in buffer log
// offset to a point where entity size begins, i.e.: '255,"func"\n'. This makes
// comparing code entities pretty easy.
typedef char* CodeEntityInfo;
class Interval {
public:
Interval()
: min_addr_(reinterpret_cast<Address>(-1)),
max_addr_(reinterpret_cast<Address>(0)), next_(NULL) {}
~Interval() { delete next_; }
size_t Length() {
size_t result = max_addr_ - min_addr_ + 1;
if (next_ != NULL) result += next_->Length();
return result;
}
void CloneFrom(Interval* src) {
while (src != NULL) {
RegisterAddress(src->min_addr_);
RegisterAddress(src->max_addr_);
src = src->next_;
}
}
bool Contains(Address addr) {
if (min_addr_ <= addr && addr <= max_addr_) {
return true;
}
if (next_ != NULL) {
return next_->Contains(addr);
} else {
return false;
}
}
size_t GetIndex(Address addr) {
if (min_addr_ <= addr && addr <= max_addr_) {
return addr - min_addr_;
}
CHECK_NE(NULL, next_);
return (max_addr_ - min_addr_ + 1) + next_->GetIndex(addr);
}
Address GetMinAddr() {
return next_ == NULL ? min_addr_ : i::Min(min_addr_, next_->GetMinAddr());
}
Address GetMaxAddr() {
return next_ == NULL ? max_addr_ : i::Max(max_addr_, next_->GetMaxAddr());
}
void RegisterAddress(Address addr) {
if (min_addr_ == reinterpret_cast<Address>(-1)
|| (size_t)(addr > min_addr_ ?
addr - min_addr_ : min_addr_ - addr) < MAX_DELTA) {
if (addr < min_addr_) min_addr_ = addr;
if (addr > max_addr_) max_addr_ = addr;
} else {
if (next_ == NULL) next_ = new Interval();
next_->RegisterAddress(addr);
}
}
Address raw_min_addr() { return min_addr_; }
Address raw_max_addr() { return max_addr_; }
Interval* get_next() { return next_; }
private:
static const size_t MAX_DELTA = 0x100000;
Address min_addr_;
Address max_addr_;
Interval* next_;
};
// A structure used to return log parsing results.
class ParseLogResult {
public:
ParseLogResult()
: entities_map(NULL), entities(NULL),
max_entities(0) {}
~ParseLogResult() {
i::DeleteArray(entities_map);
i::DeleteArray(entities);
}
void AllocateEntities() {
// Make sure that the test doesn't operate on a bogus log.
CHECK_GT(max_entities, 0);
CHECK_GT(bounds.GetMinAddr(), 0);
CHECK_GT(bounds.GetMaxAddr(), bounds.GetMinAddr());
entities = i::NewArray<CodeEntityInfo>(max_entities);
for (int i = 0; i < max_entities; ++i) {
entities[i] = NULL;
}
const size_t map_length = bounds.Length();
entities_map = i::NewArray<int>(static_cast<int>(map_length));
for (size_t i = 0; i < map_length; ++i) {
entities_map[i] = -1;
}
}
bool HasIndexForAddress(Address addr) {
return bounds.Contains(addr);
}
size_t GetIndexForAddress(Address addr) {
CHECK(HasIndexForAddress(addr));
return bounds.GetIndex(addr);
}
CodeEntityInfo GetEntity(Address addr) {
if (HasIndexForAddress(addr)) {
size_t idx = GetIndexForAddress(addr);
int item = entities_map[idx];
return item != -1 ? entities[item] : NULL;
}
return NULL;
}
void ParseAddress(char* start) {
Address addr =
reinterpret_cast<Address>(strtoul(start, NULL, 16)); // NOLINT
bounds.RegisterAddress(addr);
}
Address ConsumeAddress(char** start) {
char* end_ptr;
Address addr =
reinterpret_cast<Address>(strtoul(*start, &end_ptr, 16)); // NOLINT
CHECK(HasIndexForAddress(addr));
*start = end_ptr;
return addr;
}
Interval bounds;
// Memory map of entities start addresses.
int* entities_map;
// An array of code entities.
CodeEntityInfo* entities;
// Maximal entities count. Actual entities count can be lower,
// empty entity slots are pointing to NULL.
int max_entities;
};
} // namespace
typedef void (*ParserBlock)(char* start, char* end, ParseLogResult* result);
static void ParserCycle(
char* start, char* end, ParseLogResult* result,
ParserBlock block_creation, ParserBlock block_delete,
ParserBlock block_move) {
const char* code_creation = "code-creation,";
const char* code_delete = "code-delete,";
const char* code_move = "code-move,";
const char* lazy_compile = "LazyCompile,";
const char* script = "Script,";
const char* function = "Function,";
while (start < end) {
if (Consume(code_creation, &start)) {
if (Consume(lazy_compile, &start)
|| Consume(script, &start)
|| Consume(function, &start)) {
block_creation(start, end, result);
}
} else if (Consume(code_delete, &start)) {
block_delete(start, end, result);
} else if (Consume(code_move, &start)) {
block_move(start, end, result);
}
while (start < end && *start != '\n') ++start;
++start;
}
}
static void Pass1CodeCreation(char* start, char* end, ParseLogResult* result) {
result->ParseAddress(start);
++result->max_entities;
}
static void Pass1CodeDelete(char* start, char* end, ParseLogResult* result) {
result->ParseAddress(start);
}
static void Pass1CodeMove(char* start, char* end, ParseLogResult* result) {
result->ParseAddress(start);
// Skip old address.
while (start < end && *start != ',') ++start;
CHECK_GT(end, start);
++start; // Skip ','.
result->ParseAddress(start);
}
static void Pass2CodeCreation(char* start, char* end, ParseLogResult* result) {
Address addr = result->ConsumeAddress(&start);
CHECK_GT(end, start);
++start; // Skip ','.
size_t idx = result->GetIndexForAddress(addr);
result->entities_map[idx] = -1;
for (int i = 0; i < result->max_entities; ++i) {
// Find an empty slot and fill it.
if (result->entities[i] == NULL) {
result->entities[i] = start;
result->entities_map[idx] = i;
break;
}
}
// Make sure that a slot was found.
CHECK_GE(result->entities_map[idx], 0);
}
static void Pass2CodeDelete(char* start, char* end, ParseLogResult* result) {
Address addr = result->ConsumeAddress(&start);
size_t idx = result->GetIndexForAddress(addr);
// There can be code deletes that are not related to JS code.
if (result->entities_map[idx] >= 0) {
result->entities[result->entities_map[idx]] = NULL;
result->entities_map[idx] = -1;
}
}
static void Pass2CodeMove(char* start, char* end, ParseLogResult* result) {
Address from_addr = result->ConsumeAddress(&start);
CHECK_GT(end, start);
++start; // Skip ','.
Address to_addr = result->ConsumeAddress(&start);
CHECK_GT(end, start);
size_t from_idx = result->GetIndexForAddress(from_addr);
size_t to_idx = result->GetIndexForAddress(to_addr);
// There can be code moves that are not related to JS code.
if (from_idx != to_idx && result->entities_map[from_idx] >= 0) {
CHECK_EQ(-1, result->entities_map[to_idx]);
result->entities_map[to_idx] = result->entities_map[from_idx];
result->entities_map[from_idx] = -1;
};
}
static void ParseLog(char* start, char* end, ParseLogResult* result) {
// Pass 1: Calculate boundaries of addresses and entities count.
ParserCycle(start, end, result,
Pass1CodeCreation, Pass1CodeDelete, Pass1CodeMove);
printf("min_addr: %p, max_addr: %p, entities: %d\n",
result->bounds.GetMinAddr(), result->bounds.GetMaxAddr(),
result->max_entities);
result->AllocateEntities();
// Pass 2: Fill in code entries data.
ParserCycle(start, end, result,
Pass2CodeCreation, Pass2CodeDelete, Pass2CodeMove);
}
static inline void PrintCodeEntityInfo(CodeEntityInfo entity) {
const int max_len = 50;
if (entity != NULL) {
char* eol = strchr(entity, '\n');
int len = static_cast<int>(eol - entity);
len = len <= max_len ? len : max_len;
printf("%-*.*s ", max_len, len, entity);
} else {
printf("%*s", max_len + 1, "");
}
}
static void PrintCodeEntitiesInfo(
bool is_equal, Address addr,
CodeEntityInfo l_entity, CodeEntityInfo r_entity) {
printf("%c %p ", is_equal ? ' ' : '*', addr);
PrintCodeEntityInfo(l_entity);
PrintCodeEntityInfo(r_entity);
printf("\n");
}
static inline int StrChrLen(const char* s, char c) {
return static_cast<int>(strchr(s, c) - s);
}
static bool AreFuncSizesEqual(CodeEntityInfo ref_s, CodeEntityInfo new_s) {
int ref_len = StrChrLen(ref_s, ',');
int new_len = StrChrLen(new_s, ',');
return ref_len == new_len && strncmp(ref_s, new_s, ref_len) == 0;
}
static bool AreFuncNamesEqual(CodeEntityInfo ref_s, CodeEntityInfo new_s) {
// Skip size.
ref_s = strchr(ref_s, ',') + 1;
new_s = strchr(new_s, ',') + 1;
CHECK_EQ('"', ref_s[0]);
CHECK_EQ('"', new_s[0]);
int ref_len = StrChrLen(ref_s + 1, '\"');
int new_len = StrChrLen(new_s + 1, '\"');
// A special case for ErrorPrototype. Haven't yet figured out why they
// are different.
const char* error_prototype = "\"ErrorPrototype";
if (IsStringEqualTo(error_prototype, ref_s)
&& IsStringEqualTo(error_prototype, new_s)) {
return true;
}
// Built-in objects have problems too.
const char* built_ins[] = {
"\"Boolean\"", "\"Function\"", "\"Number\"",
"\"Object\"", "\"Script\"", "\"String\""
};
for (size_t i = 0; i < sizeof(built_ins) / sizeof(*built_ins); ++i) {
if (IsStringEqualTo(built_ins[i], new_s)) {
return true;
}
}
return ref_len == new_len && strncmp(ref_s, new_s, ref_len) == 0;
}
static bool AreEntitiesEqual(CodeEntityInfo ref_e, CodeEntityInfo new_e) {
if (ref_e == NULL && new_e != NULL) return true;
if (ref_e != NULL && new_e != NULL) {
return AreFuncSizesEqual(ref_e, new_e) && AreFuncNamesEqual(ref_e, new_e);
}
if (ref_e != NULL && new_e == NULL) {
// args_count entities (argument adapters) are not found by heap traversal,
// but they are not needed because they doesn't contain any code.
ref_e = strchr(ref_e, ',') + 1;
const char* args_count = "\"args_count:";
return IsStringEqualTo(args_count, ref_e);
}
return false;
}
// Test that logging of code create / move / delete events
// is equivalent to traversal of a resulting heap.
TEST(EquivalenceOfLoggingAndTraversal) {
// This test needs to be run on a "clean" V8 to ensure that snapshot log
// is loaded. This is always true when running using tools/test.py because
// it launches a new cctest instance for every test. To be sure that launching
// cctest manually also works, please be sure that no tests below
// are using V8.
//
// P.S. No, V8 can't be re-initialized after disposal, see include/v8.h.
CHECK(!i::V8::IsRunning());
i::FLAG_logfile = "*";
i::FLAG_log = true;
i::FLAG_log_code = true;
// Make sure objects move.
bool saved_always_compact = i::FLAG_always_compact;
if (!i::FLAG_never_compact) {
i::FLAG_always_compact = true;
}
v8::HandleScope scope;
v8::Handle<v8::Value> global_object = v8::Handle<v8::Value>();
v8::Handle<v8::Context> env = v8::Context::New(
0, v8::Handle<v8::ObjectTemplate>(), global_object);
env->Enter();
// Compile and run a function that creates other functions.
CompileAndRunScript(
"(function f(obj) {\n"
" obj.test =\n"
" (function a(j) { return function b() { return j; } })(100);\n"
"})(this);");
HEAP->CollectAllGarbage(false);
EmbeddedVector<char, 204800> buffer;
int log_size;
ParseLogResult ref_result;
// Retrieve the log.
{
// Make sure that no GCs occur prior to LogCompiledFunctions call.
i::AssertNoAllocation no_alloc;
log_size = GetLogLines(0, &buffer);
CHECK_GT(log_size, 0);
CHECK_GT(buffer.length(), log_size);
// Fill a map of compiled code objects.
ParseLog(buffer.start(), buffer.start() + log_size, &ref_result);
}
// Iterate heap to find compiled functions, will write to log.
LOGGER->LogCompiledFunctions();
char* new_log_start = buffer.start() + log_size;
const int new_log_size = LOGGER->GetLogLines(
log_size, new_log_start, buffer.length() - log_size);
CHECK_GT(new_log_size, 0);
CHECK_GT(buffer.length(), log_size + new_log_size);
// Fill an equivalent map of compiled code objects.
ParseLogResult new_result;
ParseLog(new_log_start, new_log_start + new_log_size, &new_result);
// Test their actual equivalence.
Interval combined;
combined.CloneFrom(&ref_result.bounds);
combined.CloneFrom(&new_result.bounds);
Interval* iter = &combined;
bool results_equal = true;
while (iter != NULL) {
for (Address addr = iter->raw_min_addr();
addr <= iter->raw_max_addr(); ++addr) {
CodeEntityInfo ref_entity = ref_result.GetEntity(addr);
CodeEntityInfo new_entity = new_result.GetEntity(addr);
if (ref_entity != NULL || new_entity != NULL) {
const bool equal = AreEntitiesEqual(ref_entity, new_entity);
if (!equal) results_equal = false;
PrintCodeEntitiesInfo(equal, addr, ref_entity, new_entity);
}
}
iter = iter->get_next();
}
// Make sure that all log data is written prior crash due to CHECK failure.
fflush(stdout);
CHECK(results_equal);
env->Exit();
LOGGER->TearDown();
i::FLAG_always_compact = saved_always_compact;
}