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// Copyright 2009 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "src/v8.h"
#include "src/log-utils.h"
#include "src/string-stream.h"
#include "src/version.h"
namespace v8 {
namespace internal {
const char* const Log::kLogToTemporaryFile = "&";
const char* const Log::kLogToConsole = "-";
Log::Log(Logger* logger)
: is_stopped_(false),
output_handle_(NULL),
message_buffer_(NULL),
logger_(logger) {
}
void Log::Initialize(const char* log_file_name) {
message_buffer_ = NewArray<char>(kMessageBufferSize);
// --log-all enables all the log flags.
if (FLAG_log_all) {
FLAG_log_api = true;
FLAG_log_code = true;
FLAG_log_gc = true;
FLAG_log_suspect = true;
FLAG_log_handles = true;
FLAG_log_regexp = true;
FLAG_log_internal_timer_events = true;
}
// --prof implies --log-code.
if (FLAG_prof) FLAG_log_code = true;
// If we're logging anything, we need to open the log file.
if (Log::InitLogAtStart()) {
if (strcmp(log_file_name, kLogToConsole) == 0) {
OpenStdout();
} else if (strcmp(log_file_name, kLogToTemporaryFile) == 0) {
OpenTemporaryFile();
} else {
OpenFile(log_file_name);
}
if (output_handle_ != nullptr) {
Log::MessageBuilder msg(this);
msg.Append("v8-version,%d,%d,%d,%d,%d", Version::GetMajor(),
Version::GetMinor(), Version::GetBuild(), Version::GetPatch(),
Version::IsCandidate());
msg.WriteToLogFile();
}
}
}
void Log::OpenStdout() {
DCHECK(!IsEnabled());
output_handle_ = stdout;
}
void Log::OpenTemporaryFile() {
DCHECK(!IsEnabled());
output_handle_ = base::OS::OpenTemporaryFile();
}
void Log::OpenFile(const char* name) {
DCHECK(!IsEnabled());
output_handle_ = base::OS::FOpen(name, base::OS::LogFileOpenMode);
}
FILE* Log::Close() {
FILE* result = NULL;
if (output_handle_ != NULL) {
if (strcmp(FLAG_logfile, kLogToTemporaryFile) != 0) {
fclose(output_handle_);
} else {
result = output_handle_;
}
}
output_handle_ = NULL;
DeleteArray(message_buffer_);
message_buffer_ = NULL;
is_stopped_ = false;
return result;
}
Log::MessageBuilder::MessageBuilder(Log* log)
: log_(log),
lock_guard_(&log_->mutex_),
pos_(0) {
DCHECK(log_->message_buffer_ != NULL);
}
void Log::MessageBuilder::Append(const char* format, ...) {
Vector<char> buf(log_->message_buffer_ + pos_,
Log::kMessageBufferSize - pos_);
va_list args;
va_start(args, format);
AppendVA(format, args);
va_end(args);
DCHECK(pos_ <= Log::kMessageBufferSize);
}
void Log::MessageBuilder::AppendVA(const char* format, va_list args) {
Vector<char> buf(log_->message_buffer_ + pos_,
Log::kMessageBufferSize - pos_);
int result = v8::internal::VSNPrintF(buf, format, args);
// Result is -1 if output was truncated.
if (result >= 0) {
pos_ += result;
} else {
pos_ = Log::kMessageBufferSize;
}
DCHECK(pos_ <= Log::kMessageBufferSize);
}
void Log::MessageBuilder::Append(const char c) {
if (pos_ < Log::kMessageBufferSize) {
log_->message_buffer_[pos_++] = c;
}
DCHECK(pos_ <= Log::kMessageBufferSize);
}
void Log::MessageBuilder::AppendDoubleQuotedString(const char* string) {
Append('"');
for (const char* p = string; *p != '\0'; p++) {
if (*p == '"') {
Append('\\');
}
Append(*p);
}
Append('"');
}
void Log::MessageBuilder::Append(String* str) {
DisallowHeapAllocation no_gc; // Ensure string stay valid.
int length = str->length();
for (int i = 0; i < length; i++) {
Append(static_cast<char>(str->Get(i)));
}
}
void Log::MessageBuilder::AppendAddress(Address addr) {
Append("0x%" V8PRIxPTR, addr);
}
void Log::MessageBuilder::AppendSymbolName(Symbol* symbol) {
DCHECK(symbol);
Append("symbol(");
if (!symbol->name()->IsUndefined()) {
Append("\"");
AppendDetailed(String::cast(symbol->name()), false);
Append("\" ");
}
Append("hash %x)", symbol->Hash());
}
void Log::MessageBuilder::AppendDetailed(String* str, bool show_impl_info) {
if (str == NULL) return;
DisallowHeapAllocation no_gc; // Ensure string stay valid.
int len = str->length();
if (len > 0x1000)
len = 0x1000;
if (show_impl_info) {
Append(str->IsOneByteRepresentation() ? 'a' : '2');
if (StringShape(str).IsExternal())
Append('e');
if (StringShape(str).IsInternalized())
Append('#');
Append(":%i:", str->length());
}
for (int i = 0; i < len; i++) {
uc32 c = str->Get(i);
if (c > 0xff) {
Append("\\u%04x", c);
} else if (c < 32 || c > 126) {
Append("\\x%02x", c);
} else if (c == ',') {
Append("\\,");
} else if (c == '\\') {
Append("\\\\");
} else if (c == '\"') {
Append("\"\"");
} else {
Append("%lc", c);
}
}
}
void Log::MessageBuilder::AppendStringPart(const char* str, int len) {
if (pos_ + len > Log::kMessageBufferSize) {
len = Log::kMessageBufferSize - pos_;
DCHECK(len >= 0);
if (len == 0) return;
}
Vector<char> buf(log_->message_buffer_ + pos_,
Log::kMessageBufferSize - pos_);
StrNCpy(buf, str, len);
pos_ += len;
DCHECK(pos_ <= Log::kMessageBufferSize);
}
void Log::MessageBuilder::WriteToLogFile() {
DCHECK(pos_ <= Log::kMessageBufferSize);
// Assert that we do not already have a new line at the end.
DCHECK(pos_ == 0 || log_->message_buffer_[pos_ - 1] != '\n');
if (pos_ == Log::kMessageBufferSize) pos_--;
log_->message_buffer_[pos_++] = '\n';
const int written = log_->WriteToFile(log_->message_buffer_, pos_);
if (written != pos_) {
log_->stop();
log_->logger_->LogFailure();
}
}
} } // namespace v8::internal