view src/share/vm/interpreter/cppInterpreter.cpp @ 2346:e1162778c1c8

7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error Summary: A referent object that is only weakly reachable at the start of concurrent marking but is re-attached to the strongly reachable object graph during marking may not be marked as live. This can cause the reference object to be processed prematurely and leave dangling pointers to the referent object. Implement a read barrier for the java.lang.ref.Reference::referent field by intrinsifying the Reference.get() method, and intercepting accesses though JNI, reflection, and Unsafe, so that when a non-null referent object is read it is also logged in an SATB buffer. Reviewed-by: kvn, iveresov, never, tonyp, dholmes
author johnc
date Thu, 07 Apr 2011 09:53:20 -0700
parents f95d63e2154a
children a3e2f723f2a5
line wrap: on
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/*
 * Copyright (c) 1997, 2011, 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.
 *
 */

#include "precompiled.hpp"
#include "interpreter/bytecodeInterpreter.hpp"
#include "interpreter/interpreter.hpp"
#include "interpreter/interpreterGenerator.hpp"
#include "interpreter/interpreterRuntime.hpp"

#ifdef CC_INTERP
# define __ _masm->

void CppInterpreter::initialize() {
  if (_code != NULL) return;
  AbstractInterpreter::initialize();

  // generate interpreter
  { ResourceMark rm;
    TraceTime timer("Interpreter generation", TraceStartupTime);
    int code_size = InterpreterCodeSize;
    NOT_PRODUCT(code_size *= 4;)  // debug uses extra interpreter code space
    _code = new StubQueue(new InterpreterCodeletInterface, code_size, NULL,
                          "Interpreter");
    InterpreterGenerator g(_code);
    if (PrintInterpreter) print();
  }


  // Allow c++ interpreter to do one initialization now that switches are set, etc.
  BytecodeInterpreter start_msg(BytecodeInterpreter::initialize);
  if (JvmtiExport::can_post_interpreter_events())
    BytecodeInterpreter::runWithChecks(&start_msg);
  else
    BytecodeInterpreter::run(&start_msg);
}


address    CppInterpreter::_tosca_to_stack         [AbstractInterpreter::number_of_result_handlers];
address    CppInterpreter::_stack_to_stack         [AbstractInterpreter::number_of_result_handlers];
address    CppInterpreter::_stack_to_native_abi    [AbstractInterpreter::number_of_result_handlers];

CppInterpreterGenerator::CppInterpreterGenerator(StubQueue* _code): AbstractInterpreterGenerator(_code) {
}

static const BasicType types[Interpreter::number_of_result_handlers] = {
  T_BOOLEAN,
  T_CHAR   ,
  T_BYTE   ,
  T_SHORT  ,
  T_INT    ,
  T_LONG   ,
  T_VOID   ,
  T_FLOAT  ,
  T_DOUBLE ,
  T_OBJECT
};

void CppInterpreterGenerator::generate_all() {
  AbstractInterpreterGenerator::generate_all();

  { CodeletMark cm(_masm, "result handlers for native calls");
    // The various result converter stublets.
    int is_generated[Interpreter::number_of_result_handlers];
    memset(is_generated, 0, sizeof(is_generated));
    int _tosca_to_stack_is_generated[Interpreter::number_of_result_handlers];
    int _stack_to_stack_is_generated[Interpreter::number_of_result_handlers];
    int _stack_to_native_abi_is_generated[Interpreter::number_of_result_handlers];

    memset(_tosca_to_stack_is_generated, 0, sizeof(_tosca_to_stack_is_generated));
    memset(_stack_to_stack_is_generated, 0, sizeof(_stack_to_stack_is_generated));
    memset(_stack_to_native_abi_is_generated, 0, sizeof(_stack_to_native_abi_is_generated));
    for (int i = 0; i < Interpreter::number_of_result_handlers; i++) {
      BasicType type = types[i];
      if (!is_generated[Interpreter::BasicType_as_index(type)]++) {
        Interpreter::_native_abi_to_tosca[Interpreter::BasicType_as_index(type)] = generate_result_handler_for(type);
      }
      if (!_tosca_to_stack_is_generated[Interpreter::BasicType_as_index(type)]++) {
        Interpreter::_tosca_to_stack[Interpreter::BasicType_as_index(type)] = generate_tosca_to_stack_converter(type);
      }
      if (!_stack_to_stack_is_generated[Interpreter::BasicType_as_index(type)]++) {
        Interpreter::_stack_to_stack[Interpreter::BasicType_as_index(type)] = generate_stack_to_stack_converter(type);
      }
      if (!_stack_to_native_abi_is_generated[Interpreter::BasicType_as_index(type)]++) {
        Interpreter::_stack_to_native_abi[Interpreter::BasicType_as_index(type)] = generate_stack_to_native_abi_converter(type);
      }
    }
  }


#define method_entry(kind) Interpreter::_entry_table[Interpreter::kind] = generate_method_entry(Interpreter::kind)

  { CodeletMark cm(_masm, "(kind = frame_manager)");
    // all non-native method kinds
    method_entry(zerolocals);
    method_entry(zerolocals_synchronized);
    method_entry(empty);
    method_entry(accessor);
    method_entry(abstract);
    method_entry(method_handle);
    method_entry(java_lang_math_sin   );
    method_entry(java_lang_math_cos   );
    method_entry(java_lang_math_tan   );
    method_entry(java_lang_math_abs   );
    method_entry(java_lang_math_sqrt  );
    method_entry(java_lang_math_log   );
    method_entry(java_lang_math_log10 );
    method_entry(java_lang_ref_reference_get);
    Interpreter::_native_entry_begin = Interpreter::code()->code_end();
    method_entry(native);
    method_entry(native_synchronized);
    Interpreter::_native_entry_end = Interpreter::code()->code_end();
  }


#undef method_entry

}

#endif // CC_INTERP