src/share/vm/utilities/ostream.hpp

@@ -113,11 +113,11 @@
    void print_julong(julong value);
 
    // flushing
    virtual void flush() {}
    virtual void write(const char* str, size_t len) = 0;
-   virtual void rotate_log() {} // GC log rotation
+   virtual void rotate_log(bool force, outputStream* out = NULL) {} // GC log rotation
    virtual ~outputStream() {}   // close properly on deletion
 
    void dec_cr() { dec(); cr(); }
    void inc_cr() { inc(); cr(); }
 };

@@ -238,12 +238,19 @@
   uintx  _cur_file_num;             // current logfile rotation number, from 0 to NumberOfGCLogFiles-1
  public:
   gcLogFileStream(const char* file_name);
   ~gcLogFileStream();
   virtual void write(const char* c, size_t len);
-  virtual void rotate_log();
+  virtual void rotate_log(bool force, outputStream* out = NULL);
   void dump_loggc_header();
+
+  /* If "force" sets true, force log file rotation from outside JVM */ 
+  bool should_rotate(bool force) {
+    return force ||
+             ((GCLogFileSize != 0) && ((uintx)_bytes_written >= GCLogFileSize));
+  }
+
 };
 
 #ifndef PRODUCT
 // unit test for checking -Xloggc:<filename> parsing result
 void test_loggc_filename();