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

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index 6d1826126bd357ebc7555da00421cbc012babfc6..61ce6edbab414c4b91077cf257c0db9973c2ae09 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -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();
@@ -2080,6 +2080,24 @@ 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 application. This function is thread-safe.

[Søren Thygesen Gjesse, 2009/05/05 13:52:35]

Missing the after in.

[Mikhail Naganov, 2009/05/05 15:56:46]

Done.

+   *
+   * 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
    * cannot be reinitialized.