Merge (7265, 7271] from bleeding_edge to experimental/gc branch....

src/log-utils.h

 // Copyright 2006-2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 15 matching lines @@
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #ifndef V8_LOG_UTILS_H_
 #define V8_LOG_UTILS_H_
 
 namespace v8 {
 namespace internal {
 
 #ifdef ENABLE_LOGGING_AND_PROFILING
 
+class Logger;
+
 // A memory buffer that increments its size as you write in it.  Size
 // is incremented with 'block_size' steps, never exceeding 'max_size'.
 // During growth, memory contents are never copied.  At the end of the
 // buffer an amount of memory specified in 'seal_size' is reserved.
 // When writing position reaches max_size - seal_size, buffer auto-seals
 // itself with 'seal' and allows no further writes. Data pointed by
 // 'seal' must be available during entire LogDynamicBuffer lifetime.
 //
 // An instance of this class is created dynamically by Log.
 class LogDynamicBuffer {
@@ skipping 36 matching lines @@
   const int seal_size_;
   ScopedVector<char*> blocks_;
   int write_pos_;
   int block_index_;
   int block_write_pos_;
   bool is_sealed_;
 };
 
 
 // Functions and data for performing output of log messages.
-class Log : public AllStatic {
+class Log {
  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();
+  // Performs process-wide initialization.
+  void Initialize();
 
   // Disables logging, but preserves acquired resources.
-  static void stop() { is_stopped_ = true; }
+  void stop() { is_stopped_ = true; }
 
-  // Frees all resources acquired in Open... functions.
-  static void Close();
+  // Frees all resources acquired in Initialize and Open... functions.
+  void Close();
 
   // See description in include/v8.h.
-  static int GetLogLines(int from_pos, char* dest_buf, int max_size);
+  int GetLogLines(int from_pos, char* dest_buf, int max_size);
 
   // Returns whether logging is enabled.
-  static bool IsEnabled() {
+  bool IsEnabled() {
     return !is_stopped_ && (output_handle_ != NULL || output_buffer_ != NULL);
   }
 
   // Size of buffer used for formatting log messages.
   static const int kMessageBufferSize = v8::V8::kMinimumSizeForLogLinesBuffer;
 
  private:
-  typedef int (*WritePtr)(const char* msg, int length);
+  explicit Log(Logger* logger);
 
-  // Initialization function called from Open... functions.
-  static void Init();
+  // Opens stdout for logging.
+  void OpenStdout();
 
-  // Write functions assume that mutex_ is acquired by the caller.
-  static WritePtr Write;
+  // Opens file for logging.
+  void OpenFile(const char* name);
+
+  // Opens memory buffer for logging.
+  void OpenMemoryBuffer();
 
   // Implementation of writing to a log file.
-  static int WriteToFile(const char* msg, int length) {
+  int WriteToFile(const char* msg, int length) {
     ASSERT(output_handle_ != NULL);
     size_t rv = fwrite(msg, 1, length, output_handle_);
     ASSERT(static_cast<size_t>(length) == rv);
     USE(rv);
     fflush(output_handle_);
     return length;
   }
 
   // Implementation of writing to a memory buffer.
-  static int WriteToMemory(const char* msg, int length) {
+  int WriteToMemory(const char* msg, int length) {
     ASSERT(output_buffer_ != NULL);
     return output_buffer_->Write(msg, length);
   }
 
+  bool write_to_file_;
+
   // Whether logging is stopped (e.g. due to insufficient resources).
-  static bool is_stopped_;
+  bool is_stopped_;
 
   // When logging is active, either output_handle_ or output_buffer_ is used
   // to store a pointer to log destination. If logging was opened via OpenStdout
   // or OpenFile, then output_handle_ is used. If logging was opened
   // via OpenMemoryBuffer, then output_buffer_ is used.
   // mutex_ should be acquired before using output_handle_ or output_buffer_.
-  static FILE* output_handle_;
+  FILE* output_handle_;
 
   // Used when low-level profiling is active to save code object contents.
-  static FILE* output_code_handle_;
+  FILE* output_code_handle_;
 
-  static LogDynamicBuffer* output_buffer_;
+  LogDynamicBuffer* output_buffer_;
 
   // Size of dynamic buffer block (and dynamic buffer initial size).
   static const int kDynamicBufferBlockSize = 65536;
 
   // Maximum size of dynamic buffer.
   static const int kMaxDynamicBufferSize = 50 * 1024 * 1024;
 
   // Message to "seal" dynamic buffer with.
-  static const char* kDynamicBufferSeal;
+  static const char* const kDynamicBufferSeal;
 
   // mutex_ is a Mutex used for enforcing exclusive
   // access to the formatting buffer and the log file or log memory buffer.
-  static Mutex* mutex_;
+  Mutex* mutex_;
 
   // Buffer used for formatting log messages. This is a singleton buffer and
   // mutex_ should be acquired before using it.
-  static char* message_buffer_;
+  char* message_buffer_;
+
+  Logger* logger_;
 
   friend class Logger;
   friend class LogMessageBuilder;
 };
 
 
 // Utility class for formatting log messages. It fills the message into the
 // static buffer in Log.
 class LogMessageBuilder BASE_EMBEDDED {
  public:
   // Create a message builder starting from position 0. This acquires the mutex
   // in the log as well.
-  explicit LogMessageBuilder();
+  explicit LogMessageBuilder(Logger* logger);
   ~LogMessageBuilder() { }
 
   // Append string data to the log message.
   void Append(const char* format, ...);
 
   // Append string data to the log message.
   void AppendVA(const char* format, va_list args);
 
   // Append a character to the log message.
   void Append(const char c);
 
   // Append a heap string.
   void Append(String* str);
 
   // Appends an address.
   void AppendAddress(Address addr);
 
   void AppendDetailed(String* str, bool show_impl_info);
 
   // Append a portion of a string.
   void AppendStringPart(const char* str, int len);
 
   // Write the log message to the log file currently opened.
   void WriteToLogFile();
 
-  // A handler that is called when Log::Write fails.
-  typedef void (*WriteFailureHandler)();
+ private:
 
-  static void set_write_failure_handler(WriteFailureHandler handler) {
-    write_failure_handler = handler;
-  }
-
- private:
-  static WriteFailureHandler write_failure_handler;
-
+  Log* log_;
   ScopedLock sl;
   int pos_;
 };
 
 #endif  // ENABLE_LOGGING_AND_PROFILING
 
 } }  // namespace v8::internal
 
 #endif  // V8_LOG_UTILS_H_