src/share/vm/classfile/classFileStream.cpp

rev 8957 : 8223147: JFR Backport
8199712: Flight Recorder
8203346: JFR: Inconsistent signature of jfr_add_string_constant
8195817: JFR.stop should require name of recording
8195818: JFR.start should increase autogenerated name by one
8195819: Remove recording=x from jcmd JFR.check output
8203921: JFR thread sampling is missing fixes from JDK-8194552
8203929: Limit amount of data for JFR.dump
8203664: JFR start failure after AppCDS archive created with JFR StartFlightRecording
8003209: JFR events for network utilization
8207392: [PPC64] Implement JFR profiling

*** 28,43 ****
  
  void ClassFileStream::truncated_file_error(TRAPS) {
    THROW_MSG(vmSymbols::java_lang_ClassFormatError(), "Truncated class file");
  }
  
! ClassFileStream::ClassFileStream(u1* buffer, int length, const char* source) {
    _buffer_start = buffer;
    _buffer_end   = buffer + length;
    _current      = buffer;
    _source       = source;
!   _need_verify  = false;
  }
  
  u1 ClassFileStream::get_u1(TRAPS) {
    if (_need_verify) {
      guarantee_more(1, CHECK_0);
--- 28,43 ----
  
  void ClassFileStream::truncated_file_error(TRAPS) {
    THROW_MSG(vmSymbols::java_lang_ClassFormatError(), "Truncated class file");
  }
  
! ClassFileStream::ClassFileStream(u1* buffer, int length, const char* source, bool need_verify) {
    _buffer_start = buffer;
    _buffer_end   = buffer + length;
    _current      = buffer;
    _source       = source;
!   _need_verify  = need_verify;
  }
  
  u1 ClassFileStream::get_u1(TRAPS) {
    if (_need_verify) {
      guarantee_more(1, CHECK_0);
*** 98,102 ****
--- 98,130 ----
    if (_need_verify) {
      guarantee_more(length * 4, CHECK);
    }
    _current += length * 4;
  }
+ 
+ #if INCLUDE_JFR
+ 
+ u1* ClassFileStream::clone_buffer() const {
+   u1* const new_buffer_start = NEW_RESOURCE_ARRAY(u1, length());
+   memcpy(new_buffer_start, _buffer_start, length());
+   return new_buffer_start;
+ }
+ 
+ const char* const ClassFileStream::clone_source() const {
+   const char* const src = source();
+   char* source_copy = NULL;
+   if (src != NULL) {
+     size_t source_len = strlen(src);
+     source_copy = NEW_RESOURCE_ARRAY(char, source_len + 1);
+     strncpy(source_copy, src, source_len + 1);
+   }
+   return source_copy;
+ }
+ 
+ ClassFileStream* ClassFileStream::clone() const {
+   u1* const new_buffer_start = clone_buffer();
+   return new ClassFileStream(new_buffer_start,
+                              length(),
+                              clone_source(),
+                              need_verify());
+ }
+ #endif // INCLUDE_JFR