jdk8-mips64-public/hotspot: src/share/vm/classfile/classFileStream.hpp@b985cbb00e68 (annotated)

src/share/vm/classfile/classFileStream.hpp@b985cbb00e68 (annotated)

src/share/vm/classfile/classFileStream.hpp

Mon, 12 Aug 2019 18:30:40 +0300

author: apetushkov
date: Mon, 12 Aug 2019 18:30:40 +0300
changeset 9858: b985cbb00e68
parent 7090: bb239308be67
child 9931: fd44df5e3bc3
permissions: -rw-r--r--

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
8202835: jfr/event/os/TestSystemProcess.java fails on missing events
Summary: Backport JFR from JDK11. Initial integration
Reviewed-by: neugens

 /*
  * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #ifndef SHARE_VM_CLASSFILE_CLASSFILESTREAM_HPP
 #define SHARE_VM_CLASSFILE_CLASSFILESTREAM_HPP
 #include "utilities/top.hpp"
 #ifdef TARGET_ARCH_x86
 # include "bytes_x86.hpp"
 #endif
 #ifdef TARGET_ARCH_sparc
 # include "bytes_sparc.hpp"
 #endif
 #ifdef TARGET_ARCH_zero
 # include "bytes_zero.hpp"
 #endif
 #ifdef TARGET_ARCH_arm
 # include "bytes_arm.hpp"
 #endif
 #ifdef TARGET_ARCH_ppc
 # include "bytes_ppc.hpp"
 #endif
 // Input stream for reading .class file
 //
 // The entire input stream is present in a buffer allocated by the caller.
 // The caller is responsible for deallocating the buffer and for using
 // ResourceMarks appropriately when constructing streams.
 class ClassFileStream: public ResourceObj {
  private:
   u1*   _buffer_start; // Buffer bottom
   u1*   _buffer_end;   // Buffer top (one past last element)
   u1*   _current;      // Current buffer position
   const char* _source; // Source of stream (directory name, ZIP/JAR archive name)
   bool  _need_verify;  // True if verification is on for the class file
   void truncated_file_error(TRAPS);
 #if INCLUDE_JFR
   u1* clone_buffer() const;
   const char* const clone_source() const;
 #endif
  public:
   // Constructor
   ClassFileStream(u1* buffer, int length, const char* source, bool need_verify = false);
   // Buffer access
   u1* buffer() const           { return _buffer_start; }
   int length() const           { return _buffer_end - _buffer_start; }
   u1* current() const          { return _current; }
   void set_current(u1* pos)    { _current = pos; }
   // for relative positioning
   juint current_offset() const {
     return (juint)(_current - _buffer_start);
   }
   const char* source() const   { return _source; }
   void set_verify(bool flag)   { _need_verify = flag; }
   void check_truncated_file(bool b, TRAPS) {
     if (b) {
       truncated_file_error(THREAD);
     }
   }
   void guarantee_more(int size, TRAPS) {
     size_t remaining = (size_t)(_buffer_end - _current);
     unsigned int usize = (unsigned int)size;
     check_truncated_file(usize > remaining, CHECK);
   }
   // Read u1 from stream
   u1 get_u1(TRAPS);
   u1 get_u1_fast() {
     return *_current++;
   }
   // Read u2 from stream
   u2 get_u2(TRAPS);
   u2 get_u2_fast() {
     u2 res = Bytes::get_Java_u2(_current);
     _current += 2;
     return res;
   }
   // Read u4 from stream
   u4 get_u4(TRAPS);
   u4 get_u4_fast() {
     u4 res = Bytes::get_Java_u4(_current);
     _current += 4;
     return res;
   }
   // Read u8 from stream
   u8 get_u8(TRAPS);
   u8 get_u8_fast() {
     u8 res = Bytes::get_Java_u8(_current);
     _current += 8;
     return res;
   }
   // Get direct pointer into stream at current position.
   // Returns NULL if length elements are not remaining. The caller is
   // responsible for calling skip below if buffer contents is used.
   u1* get_u1_buffer() {
     return _current;
   }
   u2* get_u2_buffer() {
     return (u2*) _current;
   }
   // Skip length u1 or u2 elements from stream
   void skip_u1(int length, TRAPS);
   void skip_u1_fast(int length) {
     _current += length;
   }
   void skip_u2(int length, TRAPS);
   void skip_u2_fast(int length) {
     _current += 2 * length;
   }
   void skip_u4(int length, TRAPS);
   void skip_u4_fast(int length) {
     _current += 4 * length;
   }
   // Tells whether eos is reached
   bool at_eos() const          { return _current == _buffer_end; }
 #if INCLUDE_JFR
   ClassFileStream* clone() const;
   bool need_verify() const { return _need_verify; }
 #endif
 };
 #endif // SHARE_VM_CLASSFILE_CLASSFILESTREAM_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/classfile/classFileStream.hpp@b985cbb00e68 (annotated)

src/share/vm/classfile/classFileStream.hpp