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Introduce internal Log class that handles writing log messages, enable logging to memory buffer.

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This will enable reading profiler log in Chrome. The current implementation of memory buffer is trivial (fixed size buffer, no memory recycling) but enough to start end-to-end DevTools Profiler implementation. Later it will be enhanced.

Review URL: http://codereview.chromium.org/108011

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1870 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
mikhail.naganov@gmail.com 2009-05-05 15:57:47 +00:00
parent e3762851a1
commit bf63b8f173
8 changed files with 381 additions and 92 deletions
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22
include/v8.h
View File

@ -1126,9 +1126,9 @@ class V8EXPORT Object : public Value {
/**
* Returns the identity hash for this object. The current implemenation uses
* a hidden property on the object to store the identity hash.
* a hidden property on the object to store the identity hash.
*
* The return value will never be 0. Also, it is not guaranteed to be
* The return value will never be 0. Also, it is not guaranteed to be
* unique.
*/
int GetIdentityHash();
@ -2079,6 +2079,24 @@ class V8EXPORT V8 {
*/
static void ResumeProfiler();
/**
* If logging is performed into a memory buffer (via --logfile=*), allows to
* retrieve previously written messages. This can be used for retrieving
* profiler log data in the application. This function is thread-safe.
*
* Caller provides a destination buffer that must exist during GetLogLines
* call. Only whole log lines are copied into the buffer.
*
* \param from_pos specified a point in a buffer to read from, 0 is the
* beginning of a buffer. It is assumed that caller updates its current
* position using returned size value from the previous call.
* \param dest_buf destination buffer for log data.
* \param max_size size of the destination buffer.
* \returns actual size of log data copied into buffer.
*/
static int GetLogLines(int from_pos, char* dest_buf, int max_size);
/**
* Releases any resources used by v8 and stops any utility threads
* that may be running. Note that disposing v8 is permanent, it

5
src/api.cc
View File

@ -3112,6 +3112,11 @@ void V8::ResumeProfiler() {
#endif
}
int V8::GetLogLines(int from_pos, char* dest_buf, int max_size) {
#ifdef ENABLE_LOGGING_AND_PROFILING
return i::Logger::GetLogLines(from_pos, dest_buf, max_size);
#endif
}
String::Utf8Value::Utf8Value(v8::Handle<v8::Value> obj) {
EnsureInitialized("v8::String::Utf8Value::Utf8Value()");

309
src/log.cc
View File

@ -285,8 +285,178 @@ void Profiler::Run() {
#ifdef ENABLE_LOGGING_AND_PROFILING
// Functions and data for performing output of log messages.
class Log : public AllStatic {
public:
// Opens stdout for logging.
static void OpenStdout();
// Opens file for logging.
static void OpenFile(const char* name);
// Opens memory buffer for logging.
static void OpenMemoryBuffer();
// Frees all resources acquired in Open... functions.
static void Close();
// See description in v8.h.
static int GetLogLines(int from_pos, char* dest_buf, int max_size);
static bool is_enabled() { return output_.handle != NULL; }
typedef int (*WritePtr)(const char* msg, int length);
private:
static void Init();
// Write functions assume that mutex_ is acquired by the caller.
static WritePtr Write;
static int WriteToFile(const char* msg, int length) {
ASSERT(output_.handle != NULL);
int rv = fwrite(msg, 1, length, output_.handle);
ASSERT(length == rv);
return rv;
}
static int WriteToMemory(const char* msg, int length) {
ASSERT(output_.buffer != NULL);
ASSERT(output_buffer_write_pos_ >= output_.buffer);
if (output_buffer_write_pos_ + length
<= output_.buffer + kOutputBufferSize) {
memcpy(output_buffer_write_pos_, msg, length);
output_buffer_write_pos_ += length;
return length;
} else {
// Memory buffer is full, ignore write.
return 0;
}
}
// When logging is active, output_ refers the file or memory buffer
// events are written to.
// mutex_ should be acquired before using output_.
union Output {
FILE* handle;
char* buffer;
};
static Output output_;
// mutex_ is a Mutex used for enforcing exclusive
// access to the formatting buffer and the log file or log memory buffer.
static Mutex* mutex_;
// Size of buffer used for memory logging.
static const int kOutputBufferSize = 2 * 1024 * 1024;
// Writing position in a memory buffer.
static char* output_buffer_write_pos_;
// Size of buffer used for formatting log messages.
static const int kMessageBufferSize = 2048;
// Buffer used for formatting log messages. This is a singleton buffer and
// mutex_ should be acquired before using it.
static char* message_buffer_;
friend class LogMessageBuilder;
};
Log::WritePtr Log::Write = NULL;
Log::Output Log::output_ = {NULL};
Mutex* Log::mutex_ = NULL;
char* Log::output_buffer_write_pos_ = NULL;
char* Log::message_buffer_ = NULL;
void Log::Init() {
mutex_ = OS::CreateMutex();
message_buffer_ = NewArray<char>(kMessageBufferSize);
}
void Log::OpenStdout() {
ASSERT(output_.handle == NULL);
output_.handle = stdout;
Write = WriteToFile;
Init();
}
void Log::OpenFile(const char* name) {
ASSERT(output_.handle == NULL);
output_.handle = OS::FOpen(name, OS::LogFileOpenMode);
Write = WriteToFile;
Init();
}
void Log::OpenMemoryBuffer() {
ASSERT(output_.buffer == NULL);
output_.buffer = NewArray<char>(kOutputBufferSize);
output_buffer_write_pos_ = output_.buffer;
Write = WriteToMemory;
Init();
}
void Log::Close() {
if (Write == WriteToFile) {
fclose(output_.handle);
output_.handle = NULL;
} else if (Write == WriteToMemory) {
DeleteArray(output_.buffer);
output_.buffer = NULL;
} else {
ASSERT(Write == NULL);
}
Write = NULL;
delete mutex_;
mutex_ = NULL;
DeleteArray(message_buffer_);
message_buffer_ = NULL;
}
int Log::GetLogLines(int from_pos, char* dest_buf, int max_size) {
ASSERT(output_.buffer != NULL);
ASSERT(output_buffer_write_pos_ >= output_.buffer);
ASSERT(from_pos >= 0);
ASSERT(max_size >= 0);
int actual_size = max_size;
char* buffer_read_pos = output_.buffer + from_pos;
ScopedLock sl(mutex_);
if (actual_size == 0
|| output_buffer_write_pos_ == output_.buffer
|| buffer_read_pos >= output_buffer_write_pos_) {
// No data requested or can be returned.
return 0;
}
if (buffer_read_pos + actual_size > output_buffer_write_pos_) {
// Requested size overlaps with current writing position and
// needs to be truncated.
actual_size = output_buffer_write_pos_ - buffer_read_pos;
ASSERT(actual_size == 0 || buffer_read_pos[actual_size - 1] == '\n');
} else {
// Find previous log line boundary.
char* end_pos = buffer_read_pos + actual_size - 1;
while (end_pos >= buffer_read_pos && *end_pos != '\n') --end_pos;
actual_size = end_pos - buffer_read_pos + 1;
}
ASSERT(actual_size <= max_size);
if (actual_size > 0) {
memcpy(dest_buf, buffer_read_pos, actual_size);
}
return actual_size;
}
// Utility class for formatting log messages. It fills the message into the
// static buffer in Logger.
// static buffer in Log.
class LogMessageBuilder BASE_EMBEDDED {
public:
explicit LogMessageBuilder();
@ -309,45 +479,45 @@ class LogMessageBuilder BASE_EMBEDDED {
// Create a message builder starting from position 0. This acquires the mutex
// in the logger as well.
LogMessageBuilder::LogMessageBuilder(): sl(Logger::mutex_), pos_(0) {
ASSERT(Logger::message_buffer_ != NULL);
LogMessageBuilder::LogMessageBuilder(): sl(Log::mutex_), pos_(0) {
ASSERT(Log::message_buffer_ != NULL);
}
// Append string data to the log message.
void LogMessageBuilder::Append(const char* format, ...) {
Vector<char> buf(Logger::message_buffer_ + pos_,
Logger::kMessageBufferSize - pos_);
Vector<char> buf(Log::message_buffer_ + pos_,
Log::kMessageBufferSize - pos_);
va_list args;
va_start(args, format);
Append(format, args);
va_end(args);
ASSERT(pos_ <= Logger::kMessageBufferSize);
ASSERT(pos_ <= Log::kMessageBufferSize);
}
// Append string data to the log message.
void LogMessageBuilder::Append(const char* format, va_list args) {
Vector<char> buf(Logger::message_buffer_ + pos_,
Logger::kMessageBufferSize - pos_);
Vector<char> buf(Log::message_buffer_ + pos_,
Log::kMessageBufferSize - pos_);
int result = v8::internal::OS::VSNPrintF(buf, format, args);
// Result is -1 if output was truncated.
if (result >= 0) {
pos_ += result;
} else {
pos_ = Logger::kMessageBufferSize;
pos_ = Log::kMessageBufferSize;
}
ASSERT(pos_ <= Logger::kMessageBufferSize);
ASSERT(pos_ <= Log::kMessageBufferSize);
}
// Append a character to the log message.
void LogMessageBuilder::Append(const char c) {
if (pos_ < Logger::kMessageBufferSize) {
Logger::message_buffer_[pos_++] = c;
if (pos_ < Log::kMessageBufferSize) {
Log::message_buffer_[pos_++] = c;
}
ASSERT(pos_ <= Logger::kMessageBufferSize);
ASSERT(pos_ <= Log::kMessageBufferSize);
}
@ -391,18 +561,14 @@ void LogMessageBuilder::AppendDetailed(String* str, bool show_impl_info) {
// Write the log message to the log file currently opened.
void LogMessageBuilder::WriteToLogFile() {
ASSERT(pos_ <= Logger::kMessageBufferSize);
size_t rv = fwrite(Logger::message_buffer_, 1, pos_, Logger::logfile_);
ASSERT(rv == static_cast<size_t>(pos_));
USE(rv);
ASSERT(pos_ <= Log::kMessageBufferSize);
Log::Write(Log::message_buffer_, pos_);
}
// Write a null-terminated string to to the log file currently opened.
void LogMessageBuilder::WriteCStringToLogFile(const char* str) {
size_t len = strlen(str);
size_t rv = fwrite(str, 1, len, Logger::logfile_);
ASSERT(rv == len);
USE(rv);
int len = strlen(str);
Log::Write(str, len);
}
#endif
@ -411,20 +577,22 @@ void LogMessageBuilder::WriteCStringToLogFile(const char* str) {
// Logger class implementation.
//
Ticker* Logger::ticker_ = NULL;
char* Logger::message_buffer_ = NULL;
FILE* Logger::logfile_ = NULL;
Profiler* Logger::profiler_ = NULL;
Mutex* Logger::mutex_ = NULL;
VMState* Logger::current_state_ = NULL;
VMState Logger::bottom_state_(EXTERNAL);
SlidingStateWindow* Logger::sliding_state_window_ = NULL;
bool Logger::is_enabled() {
return Log::is_enabled();
}
#endif // ENABLE_LOGGING_AND_PROFILING
void Logger::Preamble(const char* content) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (logfile_ == NULL || !FLAG_log_code) return;
if (!Log::is_enabled() || !FLAG_log_code) return;
LogMessageBuilder msg;
msg.WriteCStringToLogFile(content);
#endif
@ -440,7 +608,7 @@ void Logger::StringEvent(const char* name, const char* value) {
#ifdef ENABLE_LOGGING_AND_PROFILING
void Logger::UncheckedStringEvent(const char* name, const char* value) {
if (logfile_ == NULL) return;
if (!Log::is_enabled()) return;
LogMessageBuilder msg;
msg.Append("%s,\"%s\"\n", name, value);
msg.WriteToLogFile();
@ -450,7 +618,7 @@ void Logger::UncheckedStringEvent(const char* name, const char* value) {
void Logger::IntEvent(const char* name, int value) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (logfile_ == NULL || !FLAG_log) return;
if (!Log::is_enabled() || !FLAG_log) return;
LogMessageBuilder msg;
msg.Append("%s,%d\n", name, value);
msg.WriteToLogFile();
@ -460,7 +628,7 @@ void Logger::IntEvent(const char* name, int value) {
void Logger::HandleEvent(const char* name, Object** location) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (logfile_ == NULL || !FLAG_log_handles) return;
if (!Log::is_enabled() || !FLAG_log_handles) return;
LogMessageBuilder msg;
msg.Append("%s,0x%x\n", name,
reinterpret_cast<unsigned int>(location));
@ -471,10 +639,10 @@ void Logger::HandleEvent(const char* name, Object** location) {
#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 logfile_ is not NULL and that
// caller's responsibility to ensure that log is enabled and that
// FLAG_log_api is true.
void Logger::ApiEvent(const char* format, ...) {
ASSERT(logfile_ != NULL && FLAG_log_api);
ASSERT(Log::is_enabled() && FLAG_log_api);
LogMessageBuilder msg;
va_list ap;
va_start(ap, format);
@ -487,7 +655,7 @@ void Logger::ApiEvent(const char* format, ...) {
void Logger::ApiNamedSecurityCheck(Object* key) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (logfile_ == NULL || !FLAG_log_api) return;
if (!Log::is_enabled() || !FLAG_log_api) return;
if (key->IsString()) {
SmartPointer<char> str =
String::cast(key)->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL);
@ -505,7 +673,7 @@ void Logger::SharedLibraryEvent(const char* library_path,
unsigned start,
unsigned end) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (logfile_ == NULL || !FLAG_prof) return;
if (!Log::is_enabled() || !FLAG_prof) return;
LogMessageBuilder msg;
msg.Append("shared-library,\"%s\",0x%08x,0x%08x\n", library_path,
start, end);
@ -518,7 +686,7 @@ void Logger::SharedLibraryEvent(const wchar_t* library_path,
unsigned start,
unsigned end) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (logfile_ == NULL || !FLAG_prof) return;
if (!Log::is_enabled() || !FLAG_prof) return;
LogMessageBuilder msg;
msg.Append("shared-library,\"%ls\",0x%08x,0x%08x\n", library_path,
start, end);
@ -573,7 +741,7 @@ void Logger::LogRegExpSource(Handle<JSRegExp> regexp) {
void Logger::RegExpCompileEvent(Handle<JSRegExp> regexp, bool in_cache) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (logfile_ == NULL || !FLAG_log_regexp) return;
if (!Log::is_enabled() || !FLAG_log_regexp) return;
LogMessageBuilder msg;
msg.Append("regexp-compile,");
LogRegExpSource(regexp);
@ -585,7 +753,7 @@ void Logger::RegExpCompileEvent(Handle<JSRegExp> regexp, bool in_cache) {
void Logger::LogRuntime(Vector<const char> format, JSArray* args) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (logfile_ == NULL || !FLAG_log_runtime) return;
if (!Log::is_enabled() || !FLAG_log_runtime) return;
HandleScope scope;
LogMessageBuilder msg;
for (int i = 0; i < format.length(); i++) {
@ -626,7 +794,7 @@ void Logger::LogRuntime(Vector<const char> format, JSArray* args) {
void Logger::ApiIndexedSecurityCheck(uint32_t index) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (logfile_ == NULL || !FLAG_log_api) return;
if (!Log::is_enabled() || !FLAG_log_api) return;
ApiEvent("api,check-security,%u\n", index);
#endif
}
@ -637,7 +805,7 @@ void Logger::ApiNamedPropertyAccess(const char* tag,
Object* name) {
#ifdef ENABLE_LOGGING_AND_PROFILING
ASSERT(name->IsString());
if (logfile_ == NULL || !FLAG_log_api) return;
if (!Log::is_enabled() || !FLAG_log_api) return;
String* class_name_obj = holder->class_name();
SmartPointer<char> class_name =
class_name_obj->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL);
@ -651,7 +819,7 @@ void Logger::ApiIndexedPropertyAccess(const char* tag,
JSObject* holder,
uint32_t index) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (logfile_ == NULL || !FLAG_log_api) return;
if (!Log::is_enabled() || !FLAG_log_api) return;
String* class_name_obj = holder->class_name();
SmartPointer<char> class_name =
class_name_obj->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL);
@ -661,7 +829,7 @@ void Logger::ApiIndexedPropertyAccess(const char* tag,
void Logger::ApiObjectAccess(const char* tag, JSObject* object) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (logfile_ == NULL || !FLAG_log_api) return;
if (!Log::is_enabled() || !FLAG_log_api) return;
String* class_name_obj = object->class_name();
SmartPointer<char> class_name =
class_name_obj->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL);
@ -672,7 +840,7 @@ void Logger::ApiObjectAccess(const char* tag, JSObject* object) {
void Logger::ApiEntryCall(const char* name) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (logfile_ == NULL || !FLAG_log_api) return;
if (!Log::is_enabled() || !FLAG_log_api) return;
Logger::ApiEvent("api,%s\n", name);
#endif
}
@ -680,7 +848,7 @@ void Logger::ApiEntryCall(const char* name) {
void Logger::NewEvent(const char* name, void* object, size_t size) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (logfile_ == NULL || !FLAG_log) return;
if (!Log::is_enabled() || !FLAG_log) return;
LogMessageBuilder msg;
msg.Append("new,%s,0x%x,%u\n", name,
reinterpret_cast<unsigned int>(object),
@ -692,7 +860,7 @@ void Logger::NewEvent(const char* name, void* object, size_t size) {
void Logger::DeleteEvent(const char* name, void* object) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (logfile_ == NULL || !FLAG_log) return;
if (!Log::is_enabled() || !FLAG_log) return;
LogMessageBuilder msg;
msg.Append("delete,%s,0x%x\n", name,
reinterpret_cast<unsigned int>(object));
@ -703,7 +871,7 @@ void Logger::DeleteEvent(const char* name, void* object) {
void Logger::CodeCreateEvent(const char* tag, Code* code, const char* comment) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (logfile_ == NULL || !FLAG_log_code) return;
if (!Log::is_enabled() || !FLAG_log_code) return;
LogMessageBuilder msg;
msg.Append("code-creation,%s,0x%x,%d,\"", tag,
reinterpret_cast<unsigned int>(code->address()),
@ -723,7 +891,7 @@ void Logger::CodeCreateEvent(const char* tag, Code* code, const char* comment) {
void Logger::CodeCreateEvent(const char* tag, Code* code, String* name) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (logfile_ == NULL || !FLAG_log_code) return;
if (!Log::is_enabled() || !FLAG_log_code) return;
LogMessageBuilder msg;
SmartPointer<char> str =
name->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL);
@ -738,7 +906,7 @@ void Logger::CodeCreateEvent(const char* tag, Code* code, String* name) {
void Logger::CodeCreateEvent(const char* tag, Code* code, String* name,
String* source, int line) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (logfile_ == NULL || !FLAG_log_code) return;
if (!Log::is_enabled() || !FLAG_log_code) return;
LogMessageBuilder msg;
SmartPointer<char> str =
name->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL);
@ -755,7 +923,7 @@ void Logger::CodeCreateEvent(const char* tag, Code* code, String* name,
void Logger::CodeCreateEvent(const char* tag, Code* code, int args_count) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (logfile_ == NULL || !FLAG_log_code) return;
if (!Log::is_enabled() || !FLAG_log_code) return;
LogMessageBuilder msg;
msg.Append("code-creation,%s,0x%x,%d,\"args_count: %d\"\n", tag,
reinterpret_cast<unsigned int>(code->address()),
@ -768,7 +936,7 @@ void Logger::CodeCreateEvent(const char* tag, Code* code, int args_count) {
void Logger::RegExpCodeCreateEvent(Code* code, String* source) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (logfile_ == NULL || !FLAG_log_code) return;
if (!Log::is_enabled() || !FLAG_log_code) return;
LogMessageBuilder msg;
msg.Append("code-creation,%s,0x%x,%d,\"", "RegExp",
reinterpret_cast<unsigned int>(code->address()),
@ -782,7 +950,7 @@ void Logger::RegExpCodeCreateEvent(Code* code, String* source) {
void Logger::CodeAllocateEvent(Code* code, Assembler* assem) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (logfile_ == NULL || !FLAG_log_code) return;
if (!Log::is_enabled() || !FLAG_log_code) return;
LogMessageBuilder msg;
msg.Append("code-allocate,0x%x,0x%x\n",
reinterpret_cast<unsigned int>(code->address()),
@ -794,7 +962,7 @@ void Logger::CodeAllocateEvent(Code* code, Assembler* assem) {
void Logger::CodeMoveEvent(Address from, Address to) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (logfile_ == NULL || !FLAG_log_code) return;
if (!Log::is_enabled() || !FLAG_log_code) return;
LogMessageBuilder msg;
msg.Append("code-move,0x%x,0x%x\n",
reinterpret_cast<unsigned int>(from),
@ -806,7 +974,7 @@ void Logger::CodeMoveEvent(Address from, Address to) {
void Logger::CodeDeleteEvent(Address from) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (logfile_ == NULL || !FLAG_log_code) return;
if (!Log::is_enabled() || !FLAG_log_code) return;
LogMessageBuilder msg;
msg.Append("code-delete,0x%x\n", reinterpret_cast<unsigned int>(from));
msg.WriteToLogFile();
@ -816,7 +984,7 @@ void Logger::CodeDeleteEvent(Address from) {
void Logger::ResourceEvent(const char* name, const char* tag) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (logfile_ == NULL || !FLAG_log) return;
if (!Log::is_enabled() || !FLAG_log) return;
LogMessageBuilder msg;
msg.Append("%s,%s,", name, tag);
@ -834,12 +1002,11 @@ void Logger::ResourceEvent(const char* name, const char* tag) {
void Logger::SuspectReadEvent(String* name, Object* obj) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (logfile_ == NULL || !FLAG_log_suspect) return;
if (!Log::is_enabled() || !FLAG_log_suspect) return;
LogMessageBuilder msg;
String* class_name = obj->IsJSObject()
? JSObject::cast(obj)->class_name()
: Heap::empty_string();
ScopedLock sl(mutex_);
msg.Append("suspect-read,");
msg.Append(class_name);
msg.Append(',');
@ -854,7 +1021,7 @@ void Logger::SuspectReadEvent(String* name, Object* obj) {
void Logger::HeapSampleBeginEvent(const char* space, const char* kind) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (logfile_ == NULL || !FLAG_log_gc) return;
if (!Log::is_enabled() || !FLAG_log_gc) return;
LogMessageBuilder msg;
msg.Append("heap-sample-begin,\"%s\",\"%s\"\n", space, kind);
msg.WriteToLogFile();
@ -864,7 +1031,7 @@ void Logger::HeapSampleBeginEvent(const char* space, const char* kind) {
void Logger::HeapSampleEndEvent(const char* space, const char* kind) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (logfile_ == NULL || !FLAG_log_gc) return;
if (!Log::is_enabled() || !FLAG_log_gc) return;
LogMessageBuilder msg;
msg.Append("heap-sample-end,\"%s\",\"%s\"\n", space, kind);
msg.WriteToLogFile();
@ -874,7 +1041,7 @@ void Logger::HeapSampleEndEvent(const char* space, const char* kind) {
void Logger::HeapSampleItemEvent(const char* type, int number, int bytes) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (logfile_ == NULL || !FLAG_log_gc) return;
if (!Log::is_enabled() || !FLAG_log_gc) return;
LogMessageBuilder msg;
msg.Append("heap-sample-item,%s,%d,%d\n", type, number, bytes);
msg.WriteToLogFile();
@ -884,7 +1051,7 @@ void Logger::HeapSampleItemEvent(const char* type, int number, int bytes) {
void Logger::DebugTag(const char* call_site_tag) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (logfile_ == NULL || !FLAG_log) return;
if (!Log::is_enabled() || !FLAG_log) return;
LogMessageBuilder msg;
msg.Append("debug-tag,%s\n", call_site_tag);
msg.WriteToLogFile();
@ -894,7 +1061,7 @@ void Logger::DebugTag(const char* call_site_tag) {
void Logger::DebugEvent(const char* event_type, Vector<uint16_t> parameter) {
#ifdef ENABLE_LOGGING_AND_PROFILING
if (logfile_ == NULL || !FLAG_log) return;
if (!Log::is_enabled() || !FLAG_log) return;
StringBuilder s(parameter.length() + 1);
for (int i = 0; i < parameter.length(); ++i) {
s.AddCharacter(static_cast<char>(parameter[i]));
@ -913,7 +1080,7 @@ void Logger::DebugEvent(const char* event_type, Vector<uint16_t> parameter) {
#ifdef ENABLE_LOGGING_AND_PROFILING
void Logger::TickEvent(TickSample* sample, bool overflow) {
if (logfile_ == NULL || !FLAG_prof) return;
if (!Log::is_enabled() || !FLAG_prof) return;
LogMessageBuilder msg;
msg.Append("tick,0x%x,0x%x,%d", sample->pc, sample->sp,
static_cast<int>(sample->state));
@ -941,6 +1108,12 @@ void Logger::PauseProfiler() {
void Logger::ResumeProfiler() {
profiler_->resume();
}
int Logger::GetLogLines(int from_pos, char* dest_buf, int max_size) {
return Log::GetLogLines(from_pos, dest_buf, max_size);
}
#endif
@ -967,7 +1140,9 @@ bool Logger::Setup() {
// If we're logging anything, we need to open the log file.
if (open_log_file) {
if (strcmp(FLAG_logfile, "-") == 0) {
logfile_ = stdout;
Log::OpenStdout();
} else if (strcmp(FLAG_logfile, "*") == 0) {
Log::OpenMemoryBuffer();
} else if (strchr(FLAG_logfile, '%') != NULL) {
// If there's a '%' in the log file name we have to expand
// placeholders.
@ -1003,12 +1178,10 @@ bool Logger::Setup() {
}
}
SmartPointer<const char> expanded = stream.ToCString();
logfile_ = OS::FOpen(*expanded, OS::LogFileOpenMode);
Log::OpenFile(*expanded);
} else {
logfile_ = OS::FOpen(FLAG_logfile, OS::LogFileOpenMode);
Log::OpenFile(FLAG_logfile);
}
message_buffer_ = NewArray<char>(kMessageBufferSize);
mutex_ = OS::CreateMutex();
}
current_state_ = &bottom_state_;
@ -1050,13 +1223,7 @@ void Logger::TearDown() {
delete ticker_;
if (logfile_ != NULL) {
fclose(logfile_);
logfile_ = NULL;
delete mutex_;
mutex_ = NULL;
DeleteArray(message_buffer_);
}
Log::Close();
#endif
}

26
src/log.h
View File

@ -103,10 +103,10 @@ class VMState BASE_EMBEDDED {
class Logger {
public:
// Opens the file for logging if the right flags are set.
// Acquires resources for logging if the right flags are set.
static bool Setup();
// Closes file opened in Setup.
// Frees resources acquired in Setup.
static void TearDown();
// Enable the computation of a sliding window of states.
@ -201,7 +201,7 @@ class Logger {
return current_state_ ? current_state_->state() : OTHER;
}
static bool is_enabled() { return logfile_ != NULL; }
static bool is_enabled();
// Pause/Resume collection of profiling data.
// When data collection is paused, Tick events are discarded until
@ -210,6 +210,10 @@ class Logger {
static void PauseProfiler();
static void ResumeProfiler();
// If logging is performed into a memory buffer, allows to
// retrieve previously written messages. See v8.h.
static int GetLogLines(int from_pos, char* dest_buf, int max_size);
private:
// Emits the source code of a regexp. Used by regexp events.
@ -223,17 +227,6 @@ class Logger {
// Logs a StringEvent regardless of whether FLAG_log is true.
static void UncheckedStringEvent(const char* name, const char* value);
// Size of buffer used for formatting log messages.
static const int kMessageBufferSize = 2048;
// Buffer used for formatting log messages. This is a singleton buffer and
// mutex_ should be acquired before using it.
static char* message_buffer_;
// When logging is active, logfile_ refers the file events are written to.
// mutex_ should be acquired before using logfile_.
static FILE* logfile_;
// The sampler used by the profiler and the sliding state window.
static Ticker* ticker_;
@ -242,10 +235,6 @@ class Logger {
// of samples.
static Profiler* profiler_;
// mutex_ is a Mutex used for enforcing exclusive
// access to the formatting buffer and the log file.
static Mutex* mutex_;
// A stack of VM states.
static VMState* current_state_;
@ -258,7 +247,6 @@ class Logger {
// Internal implementation classes with access to
// private members.
friend class LogMessageBuilder;
friend class EventLog;
friend class TimeLog;
friend class Profiler;

1
test/cctest/SConscript
View File

@ -47,6 +47,7 @@ SOURCES = {
'test-heap.cc',
'test-list.cc',
'test-lock.cc',
'test-log.cc',
'test-mark-compact.cc',
'test-regexp.cc',
'test-serialize.cc',

102
test/cctest/test-log.cc Normal file
View File

@ -0,0 +1,102 @@
// Copyright 2006-2009 the V8 project authors. All rights reserved.
//
// Tests of logging functions from log.h
#ifdef ENABLE_LOGGING_AND_PROFILING
#include "v8.h"
#include "log.h"
#include "cctest.h"
using v8::internal::Logger;
static void SetUp() {
// Log to memory buffer.
v8::internal::FLAG_logfile = "*";
v8::internal::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));
// Requesting data size which is smaller than first log message length.
CHECK_EQ(0, Logger::GetLogLines(0, log_lines, 3));
// See Logger::StringEvent.
const char* line_1 = "aaa,\"bbb\"\n";
const int line_1_len = strlen(line_1);
// Still smaller than log message length.
CHECK_EQ(0, Logger::GetLogLines(0, log_lines, line_1_len - 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));
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 = strlen(line_2);
// Now start with line_2 beginning.
CHECK_EQ(0, Logger::GetLogLines(line_1_len, log_lines, 0));
CHECK_EQ(0, Logger::GetLogLines(line_1_len, log_lines, 3));
CHECK_EQ(0, Logger::GetLogLines(line_1_len, log_lines, line_2_len - 1));
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 = strlen(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();
}
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 = strlen(all_lines);
CHECK_EQ(0, Logger::GetLogLines(all_lines_len, NULL, 1));
CHECK_EQ(0, Logger::GetLogLines(all_lines_len, NULL, 100));
CHECK_EQ(0, Logger::GetLogLines(all_lines_len + 1, NULL, 1));
CHECK_EQ(0, Logger::GetLogLines(all_lines_len + 1, NULL, 100));
CHECK_EQ(0, Logger::GetLogLines(all_lines_len + 100, NULL, 1));
CHECK_EQ(0, Logger::GetLogLines(all_lines_len + 100, NULL, 100));
CHECK_EQ(0, Logger::GetLogLines(10 * 1024 * 1024, NULL, 1));
CHECK_EQ(0, Logger::GetLogLines(10 * 1024 * 1024, NULL, 100));
TearDown();
}
#endif // ENABLE_LOGGING_AND_PROFILING

4
tools/visual_studio/v8_cctest.vcproj
View File

@ -201,6 +201,10 @@
RelativePath="..\..\test\cctest\test-lock.cc"
>
</File>
<File
RelativePath="..\..\test\cctest\test-log.cc"
>
</File>
<File
RelativePath="..\..\test\cctest\test-log-ia32.cc"
>

4
tools/visual_studio/v8_cctest_arm.vcproj
View File

@ -195,6 +195,10 @@
RelativePath="..\..\test\cctest\test-lock.cc"
>
</File>
<File
RelativePath="..\..\test\cctest\test-log.cc"
>
</File>
<File
RelativePath="..\..\test\cctest\test-mark-compact.cc"
>