hotspot/src/share/vm/c1/c1_Runtime1.cpp
author duke
Sat, 01 Dec 2007 00:00:00 +0000
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/*
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 * Copyright 1999-2007 Sun Microsystems, Inc.  All Rights Reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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 * CA 95054 USA or visit www.sun.com if you need additional information or
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 * have any questions.
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 *
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 */
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#include "incls/_precompiled.incl"
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#include "incls/_c1_Runtime1.cpp.incl"
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// Implementation of StubAssembler
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StubAssembler::StubAssembler(CodeBuffer* code, const char * name, int stub_id) : C1_MacroAssembler(code) {
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  _name = name;
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  _must_gc_arguments = false;
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  _frame_size = no_frame_size;
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  _num_rt_args = 0;
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  _stub_id = stub_id;
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}
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void StubAssembler::set_info(const char* name, bool must_gc_arguments) {
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  _name = name;
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  _must_gc_arguments = must_gc_arguments;
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}
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void StubAssembler::set_frame_size(int size) {
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  if (_frame_size == no_frame_size) {
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    _frame_size = size;
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  }
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  assert(_frame_size == size, "can't change the frame size");
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}
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void StubAssembler::set_num_rt_args(int args) {
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  if (_num_rt_args == 0) {
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    _num_rt_args = args;
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  }
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  assert(_num_rt_args == args, "can't change the number of args");
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}
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// Implementation of Runtime1
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bool      Runtime1::_is_initialized = false;
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CodeBlob* Runtime1::_blobs[Runtime1::number_of_ids];
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const char *Runtime1::_blob_names[] = {
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  RUNTIME1_STUBS(STUB_NAME, LAST_STUB_NAME)
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};
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#ifndef PRODUCT
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// statistics
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int Runtime1::_generic_arraycopy_cnt = 0;
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int Runtime1::_primitive_arraycopy_cnt = 0;
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int Runtime1::_oop_arraycopy_cnt = 0;
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int Runtime1::_arraycopy_slowcase_cnt = 0;
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int Runtime1::_new_type_array_slowcase_cnt = 0;
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int Runtime1::_new_object_array_slowcase_cnt = 0;
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int Runtime1::_new_instance_slowcase_cnt = 0;
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int Runtime1::_new_multi_array_slowcase_cnt = 0;
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int Runtime1::_monitorenter_slowcase_cnt = 0;
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int Runtime1::_monitorexit_slowcase_cnt = 0;
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int Runtime1::_patch_code_slowcase_cnt = 0;
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int Runtime1::_throw_range_check_exception_count = 0;
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int Runtime1::_throw_index_exception_count = 0;
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int Runtime1::_throw_div0_exception_count = 0;
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int Runtime1::_throw_null_pointer_exception_count = 0;
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int Runtime1::_throw_class_cast_exception_count = 0;
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int Runtime1::_throw_incompatible_class_change_error_count = 0;
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int Runtime1::_throw_array_store_exception_count = 0;
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int Runtime1::_throw_count = 0;
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#endif
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BufferBlob* Runtime1::_buffer_blob  = NULL;
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// Simple helper to see if the caller of a runtime stub which
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// entered the VM has been deoptimized
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static bool caller_is_deopted() {
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  JavaThread* thread = JavaThread::current();
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  RegisterMap reg_map(thread, false);
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  frame runtime_frame = thread->last_frame();
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  frame caller_frame = runtime_frame.sender(&reg_map);
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  assert(caller_frame.is_compiled_frame(), "must be compiled");
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  return caller_frame.is_deoptimized_frame();
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}
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// Stress deoptimization
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static void deopt_caller() {
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  if ( !caller_is_deopted()) {
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    JavaThread* thread = JavaThread::current();
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    RegisterMap reg_map(thread, false);
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    frame runtime_frame = thread->last_frame();
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    frame caller_frame = runtime_frame.sender(&reg_map);
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    VM_DeoptimizeFrame deopt(thread, caller_frame.id());
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    VMThread::execute(&deopt);
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    assert(caller_is_deopted(), "Must be deoptimized");
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  }
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}
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BufferBlob* Runtime1::get_buffer_blob() {
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  // Allocate code buffer space only once
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  BufferBlob* blob = _buffer_blob;
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  if (blob == NULL) {
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    // setup CodeBuffer.  Preallocate a BufferBlob of size
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    // NMethodSizeLimit plus some extra space for constants.
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    int code_buffer_size = desired_max_code_buffer_size() + desired_max_constant_size();
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    blob = BufferBlob::create("Compiler1 temporary CodeBuffer",
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                              code_buffer_size);
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    guarantee(blob != NULL, "must create initial code buffer");
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    _buffer_blob = blob;
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  }
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  return _buffer_blob;
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}
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void Runtime1::setup_code_buffer(CodeBuffer* code, int call_stub_estimate) {
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  // Preinitialize the consts section to some large size:
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  int locs_buffer_size = 20 * (relocInfo::length_limit + sizeof(relocInfo));
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  char* locs_buffer = NEW_RESOURCE_ARRAY(char, locs_buffer_size);
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  code->insts()->initialize_shared_locs((relocInfo*)locs_buffer,
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                                        locs_buffer_size / sizeof(relocInfo));
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  code->initialize_consts_size(desired_max_constant_size());
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  // Call stubs + deopt/exception handler
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  code->initialize_stubs_size((call_stub_estimate * LIR_Assembler::call_stub_size) +
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                              LIR_Assembler::exception_handler_size +
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                              LIR_Assembler::deopt_handler_size);
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}
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void Runtime1::generate_blob_for(StubID id) {
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  assert(0 <= id && id < number_of_ids, "illegal stub id");
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  ResourceMark rm;
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  // create code buffer for code storage
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  CodeBuffer code(get_buffer_blob()->instructions_begin(),
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                  get_buffer_blob()->instructions_size());
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  setup_code_buffer(&code, 0);
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  // create assembler for code generation
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  StubAssembler* sasm = new StubAssembler(&code, name_for(id), id);
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  // generate code for runtime stub
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  OopMapSet* oop_maps;
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  oop_maps = generate_code_for(id, sasm);
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  assert(oop_maps == NULL || sasm->frame_size() != no_frame_size,
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         "if stub has an oop map it must have a valid frame size");
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#ifdef ASSERT
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  // Make sure that stubs that need oopmaps have them
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  switch (id) {
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    // These stubs don't need to have an oopmap
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    case dtrace_object_alloc_id:
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    case slow_subtype_check_id:
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    case fpu2long_stub_id:
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    case unwind_exception_id:
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#ifndef TIERED
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    case counter_overflow_id: // Not generated outside the tiered world
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#endif
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#ifdef SPARC
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    case handle_exception_nofpu_id:  // Unused on sparc
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#endif
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      break;
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    // All other stubs should have oopmaps
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    default:
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      assert(oop_maps != NULL, "must have an oopmap");
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  }
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#endif
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  // align so printing shows nop's instead of random code at the end (SimpleStubs are aligned)
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  sasm->align(BytesPerWord);
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  // make sure all code is in code buffer
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  sasm->flush();
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  // create blob - distinguish a few special cases
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  CodeBlob* blob = RuntimeStub::new_runtime_stub(name_for(id),
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                                                 &code,
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                                                 CodeOffsets::frame_never_safe,
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                                                 sasm->frame_size(),
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                                                 oop_maps,
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                                                 sasm->must_gc_arguments());
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  // install blob
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  assert(blob != NULL, "blob must exist");
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  _blobs[id] = blob;
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}
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void Runtime1::initialize() {
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  // Warning: If we have more than one compilation running in parallel, we
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  //          need a lock here with the current setup (lazy initialization).
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  if (!is_initialized()) {
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    _is_initialized = true;
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    // platform-dependent initialization
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    initialize_pd();
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    // generate stubs
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    for (int id = 0; id < number_of_ids; id++) generate_blob_for((StubID)id);
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    // printing
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#ifndef PRODUCT
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    if (PrintSimpleStubs) {
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      ResourceMark rm;
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      for (int id = 0; id < number_of_ids; id++) {
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        _blobs[id]->print();
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        if (_blobs[id]->oop_maps() != NULL) {
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          _blobs[id]->oop_maps()->print();
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        }
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      }
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    }
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#endif
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  }
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}
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CodeBlob* Runtime1::blob_for(StubID id) {
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  assert(0 <= id && id < number_of_ids, "illegal stub id");
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  if (!is_initialized()) initialize();
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  return _blobs[id];
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}
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const char* Runtime1::name_for(StubID id) {
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  assert(0 <= id && id < number_of_ids, "illegal stub id");
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  return _blob_names[id];
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}
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const char* Runtime1::name_for_address(address entry) {
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  for (int id = 0; id < number_of_ids; id++) {
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    if (entry == entry_for((StubID)id)) return name_for((StubID)id);
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  }
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#define FUNCTION_CASE(a, f) \
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  if ((intptr_t)a == CAST_FROM_FN_PTR(intptr_t, f))  return #f
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  FUNCTION_CASE(entry, os::javaTimeMillis);
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  FUNCTION_CASE(entry, os::javaTimeNanos);
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  FUNCTION_CASE(entry, SharedRuntime::OSR_migration_end);
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  FUNCTION_CASE(entry, SharedRuntime::d2f);
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  FUNCTION_CASE(entry, SharedRuntime::d2i);
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  FUNCTION_CASE(entry, SharedRuntime::d2l);
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  FUNCTION_CASE(entry, SharedRuntime::dcos);
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  FUNCTION_CASE(entry, SharedRuntime::dexp);
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  FUNCTION_CASE(entry, SharedRuntime::dlog);
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  FUNCTION_CASE(entry, SharedRuntime::dlog10);
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  FUNCTION_CASE(entry, SharedRuntime::dpow);
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  FUNCTION_CASE(entry, SharedRuntime::drem);
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  FUNCTION_CASE(entry, SharedRuntime::dsin);
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  FUNCTION_CASE(entry, SharedRuntime::dtan);
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  FUNCTION_CASE(entry, SharedRuntime::f2i);
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  FUNCTION_CASE(entry, SharedRuntime::f2l);
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  FUNCTION_CASE(entry, SharedRuntime::frem);
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  FUNCTION_CASE(entry, SharedRuntime::l2d);
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  FUNCTION_CASE(entry, SharedRuntime::l2f);
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  FUNCTION_CASE(entry, SharedRuntime::ldiv);
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  FUNCTION_CASE(entry, SharedRuntime::lmul);
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  FUNCTION_CASE(entry, SharedRuntime::lrem);
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  FUNCTION_CASE(entry, SharedRuntime::lrem);
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  FUNCTION_CASE(entry, SharedRuntime::dtrace_method_entry);
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  FUNCTION_CASE(entry, SharedRuntime::dtrace_method_exit);
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  FUNCTION_CASE(entry, trace_block_entry);
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#undef FUNCTION_CASE
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  return "<unknown function>";
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}
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JRT_ENTRY(void, Runtime1::new_instance(JavaThread* thread, klassOopDesc* klass))
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  NOT_PRODUCT(_new_instance_slowcase_cnt++;)
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  assert(oop(klass)->is_klass(), "not a class");
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  instanceKlassHandle h(thread, klass);
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  h->check_valid_for_instantiation(true, CHECK);
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  // make sure klass is initialized
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  h->initialize(CHECK);
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  // allocate instance and return via TLS
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  oop obj = h->allocate_instance(CHECK);
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  thread->set_vm_result(obj);
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JRT_END
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JRT_ENTRY(void, Runtime1::new_type_array(JavaThread* thread, klassOopDesc* klass, jint length))
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  NOT_PRODUCT(_new_type_array_slowcase_cnt++;)
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  // Note: no handle for klass needed since they are not used
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  //       anymore after new_typeArray() and no GC can happen before.
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  //       (This may have to change if this code changes!)
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  assert(oop(klass)->is_klass(), "not a class");
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  BasicType elt_type = typeArrayKlass::cast(klass)->element_type();
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  oop obj = oopFactory::new_typeArray(elt_type, length, CHECK);
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  thread->set_vm_result(obj);
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  // This is pretty rare but this runtime patch is stressful to deoptimization
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  // if we deoptimize here so force a deopt to stress the path.
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  if (DeoptimizeALot) {
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    deopt_caller();
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  }
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JRT_END
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   314
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JRT_ENTRY(void, Runtime1::new_object_array(JavaThread* thread, klassOopDesc* array_klass, jint length))
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  NOT_PRODUCT(_new_object_array_slowcase_cnt++;)
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  // Note: no handle for klass needed since they are not used
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  //       anymore after new_objArray() and no GC can happen before.
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  //       (This may have to change if this code changes!)
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  assert(oop(array_klass)->is_klass(), "not a class");
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  klassOop elem_klass = objArrayKlass::cast(array_klass)->element_klass();
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  objArrayOop obj = oopFactory::new_objArray(elem_klass, length, CHECK);
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  thread->set_vm_result(obj);
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  // This is pretty rare but this runtime patch is stressful to deoptimization
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  // if we deoptimize here so force a deopt to stress the path.
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  if (DeoptimizeALot) {
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    deopt_caller();
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  }
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JRT_END
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   332
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   333
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JRT_ENTRY(void, Runtime1::new_multi_array(JavaThread* thread, klassOopDesc* klass, int rank, jint* dims))
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  NOT_PRODUCT(_new_multi_array_slowcase_cnt++;)
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   336
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  assert(oop(klass)->is_klass(), "not a class");
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   338
  assert(rank >= 1, "rank must be nonzero");
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   339
#ifdef _LP64
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// In 64 bit mode, the sizes are stored in the top 32 bits
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// of each 64 bit stack entry.
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   342
// dims is actually an intptr_t * because the arguments
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// are pushed onto a 64 bit stack.
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   344
// We must create an array of jints to pass to multi_allocate.
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// We reuse the current stack because it will be popped
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// after this bytecode is completed.
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   347
  if ( rank > 1 ) {
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   348
    int index;
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   349
    for ( index = 1; index < rank; index++ ) {  // First size is ok
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        dims[index] = dims[index*2];
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   351
    }
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  }
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#endif
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  oop obj = arrayKlass::cast(klass)->multi_allocate(rank, dims, CHECK);
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  thread->set_vm_result(obj);
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JRT_END
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   357
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   358
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   359
JRT_ENTRY(void, Runtime1::unimplemented_entry(JavaThread* thread, StubID id))
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   360
  tty->print_cr("Runtime1::entry_for(%d) returned unimplemented entry point", id);
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   361
JRT_END
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   362
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   363
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   364
JRT_ENTRY(void, Runtime1::throw_array_store_exception(JavaThread* thread))
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   365
  THROW(vmSymbolHandles::java_lang_ArrayStoreException());
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   366
JRT_END
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   367
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   368
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   369
JRT_ENTRY(void, Runtime1::post_jvmti_exception_throw(JavaThread* thread))
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   370
  if (JvmtiExport::can_post_exceptions()) {
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   371
    vframeStream vfst(thread, true);
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   372
    address bcp = vfst.method()->bcp_from(vfst.bci());
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   373
    JvmtiExport::post_exception_throw(thread, vfst.method(), bcp, thread->exception_oop());
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   374
  }
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JRT_END
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   376
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   377
#ifdef TIERED
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   378
JRT_ENTRY(void, Runtime1::counter_overflow(JavaThread* thread, int bci))
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   379
  RegisterMap map(thread, false);
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   380
  frame fr =  thread->last_frame().sender(&map);
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   381
  nmethod* nm = (nmethod*) fr.cb();
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   382
  assert(nm!= NULL && nm->is_nmethod(), "what?");
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   383
  methodHandle method(thread, nm->method());
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   384
  if (bci == 0) {
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   385
    // invocation counter overflow
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   386
    if (!Tier1CountOnly) {
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   387
      CompilationPolicy::policy()->method_invocation_event(method, CHECK);
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   388
    } else {
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   389
      method()->invocation_counter()->reset();
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   390
    }
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   391
  } else {
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   392
    if (!Tier1CountOnly) {
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   393
      // Twe have a bci but not the destination bci and besides a backedge
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   394
      // event is more for OSR which we don't want here.
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diff changeset
   395
      CompilationPolicy::policy()->method_invocation_event(method, CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   396
    } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   397
      method()->backedge_counter()->reset();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   398
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   399
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   400
JRT_END
489c9b5090e2 Initial load
duke
parents:
diff changeset
   401
#endif // TIERED
489c9b5090e2 Initial load
duke
parents:
diff changeset
   402
489c9b5090e2 Initial load
duke
parents:
diff changeset
   403
extern void vm_exit(int code);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   404
489c9b5090e2 Initial load
duke
parents:
diff changeset
   405
// Enter this method from compiled code handler below. This is where we transition
489c9b5090e2 Initial load
duke
parents:
diff changeset
   406
// to VM mode. This is done as a helper routine so that the method called directly
489c9b5090e2 Initial load
duke
parents:
diff changeset
   407
// from compiled code does not have to transition to VM. This allows the entry
489c9b5090e2 Initial load
duke
parents:
diff changeset
   408
// method to see if the nmethod that we have just looked up a handler for has
489c9b5090e2 Initial load
duke
parents:
diff changeset
   409
// been deoptimized while we were in the vm. This simplifies the assembly code
489c9b5090e2 Initial load
duke
parents:
diff changeset
   410
// cpu directories.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   411
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   412
// We are entering here from exception stub (via the entry method below)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   413
// If there is a compiled exception handler in this method, we will continue there;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   414
// otherwise we will unwind the stack and continue at the caller of top frame method
489c9b5090e2 Initial load
duke
parents:
diff changeset
   415
// Note: we enter in Java using a special JRT wrapper. This wrapper allows us to
489c9b5090e2 Initial load
duke
parents:
diff changeset
   416
// control the area where we can allow a safepoint. After we exit the safepoint area we can
489c9b5090e2 Initial load
duke
parents:
diff changeset
   417
// check to see if the handler we are going to return is now in a nmethod that has
489c9b5090e2 Initial load
duke
parents:
diff changeset
   418
// been deoptimized. If that is the case we return the deopt blob
489c9b5090e2 Initial load
duke
parents:
diff changeset
   419
// unpack_with_exception entry instead. This makes life for the exception blob easier
489c9b5090e2 Initial load
duke
parents:
diff changeset
   420
// because making that same check and diverting is painful from assembly language.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   421
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   422
489c9b5090e2 Initial load
duke
parents:
diff changeset
   423
489c9b5090e2 Initial load
duke
parents:
diff changeset
   424
JRT_ENTRY_NO_ASYNC(static address, exception_handler_for_pc_helper(JavaThread* thread, oopDesc* ex, address pc, nmethod*& nm))
489c9b5090e2 Initial load
duke
parents:
diff changeset
   425
489c9b5090e2 Initial load
duke
parents:
diff changeset
   426
  Handle exception(thread, ex);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   427
  nm = CodeCache::find_nmethod(pc);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   428
  assert(nm != NULL, "this is not an nmethod");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   429
  // Adjust the pc as needed/
489c9b5090e2 Initial load
duke
parents:
diff changeset
   430
  if (nm->is_deopt_pc(pc)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   431
    RegisterMap map(thread, false);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   432
    frame exception_frame = thread->last_frame().sender(&map);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   433
    // if the frame isn't deopted then pc must not correspond to the caller of last_frame
489c9b5090e2 Initial load
duke
parents:
diff changeset
   434
    assert(exception_frame.is_deoptimized_frame(), "must be deopted");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   435
    pc = exception_frame.pc();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   436
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   437
#ifdef ASSERT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   438
  assert(exception.not_null(), "NULL exceptions should be handled by throw_exception");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   439
  assert(exception->is_oop(), "just checking");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   440
  // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
489c9b5090e2 Initial load
duke
parents:
diff changeset
   441
  if (!(exception->is_a(SystemDictionary::throwable_klass()))) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   442
    if (ExitVMOnVerifyError) vm_exit(-1);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   443
    ShouldNotReachHere();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   444
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   445
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
   446
489c9b5090e2 Initial load
duke
parents:
diff changeset
   447
  // Check the stack guard pages and reenable them if necessary and there is
489c9b5090e2 Initial load
duke
parents:
diff changeset
   448
  // enough space on the stack to do so.  Use fast exceptions only if the guard
489c9b5090e2 Initial load
duke
parents:
diff changeset
   449
  // pages are enabled.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   450
  bool guard_pages_enabled = thread->stack_yellow_zone_enabled();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   451
  if (!guard_pages_enabled) guard_pages_enabled = thread->reguard_stack();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   452
489c9b5090e2 Initial load
duke
parents:
diff changeset
   453
  if (JvmtiExport::can_post_exceptions()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   454
    // To ensure correct notification of exception catches and throws
489c9b5090e2 Initial load
duke
parents:
diff changeset
   455
    // we have to deoptimize here.  If we attempted to notify the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   456
    // catches and throws during this exception lookup it's possible
489c9b5090e2 Initial load
duke
parents:
diff changeset
   457
    // we could deoptimize on the way out of the VM and end back in
489c9b5090e2 Initial load
duke
parents:
diff changeset
   458
    // the interpreter at the throw site.  This would result in double
489c9b5090e2 Initial load
duke
parents:
diff changeset
   459
    // notifications since the interpreter would also notify about
489c9b5090e2 Initial load
duke
parents:
diff changeset
   460
    // these same catches and throws as it unwound the frame.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   461
489c9b5090e2 Initial load
duke
parents:
diff changeset
   462
    RegisterMap reg_map(thread);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   463
    frame stub_frame = thread->last_frame();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   464
    frame caller_frame = stub_frame.sender(&reg_map);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   465
489c9b5090e2 Initial load
duke
parents:
diff changeset
   466
    // We don't really want to deoptimize the nmethod itself since we
489c9b5090e2 Initial load
duke
parents:
diff changeset
   467
    // can actually continue in the exception handler ourselves but I
489c9b5090e2 Initial load
duke
parents:
diff changeset
   468
    // don't see an easy way to have the desired effect.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   469
    VM_DeoptimizeFrame deopt(thread, caller_frame.id());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   470
    VMThread::execute(&deopt);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   471
489c9b5090e2 Initial load
duke
parents:
diff changeset
   472
    return SharedRuntime::deopt_blob()->unpack_with_exception_in_tls();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   473
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   474
489c9b5090e2 Initial load
duke
parents:
diff changeset
   475
  // ExceptionCache is used only for exceptions at call and not for implicit exceptions
489c9b5090e2 Initial load
duke
parents:
diff changeset
   476
  if (guard_pages_enabled) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   477
    address fast_continuation = nm->handler_for_exception_and_pc(exception, pc);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   478
    if (fast_continuation != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   479
      if (fast_continuation == ExceptionCache::unwind_handler()) fast_continuation = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   480
      return fast_continuation;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   481
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   482
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   483
489c9b5090e2 Initial load
duke
parents:
diff changeset
   484
  // If the stack guard pages are enabled, check whether there is a handler in
489c9b5090e2 Initial load
duke
parents:
diff changeset
   485
  // the current method.  Otherwise (guard pages disabled), force an unwind and
489c9b5090e2 Initial load
duke
parents:
diff changeset
   486
  // skip the exception cache update (i.e., just leave continuation==NULL).
489c9b5090e2 Initial load
duke
parents:
diff changeset
   487
  address continuation = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   488
  if (guard_pages_enabled) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   489
489c9b5090e2 Initial load
duke
parents:
diff changeset
   490
    // New exception handling mechanism can support inlined methods
489c9b5090e2 Initial load
duke
parents:
diff changeset
   491
    // with exception handlers since the mappings are from PC to PC
489c9b5090e2 Initial load
duke
parents:
diff changeset
   492
489c9b5090e2 Initial load
duke
parents:
diff changeset
   493
    // debugging support
489c9b5090e2 Initial load
duke
parents:
diff changeset
   494
    // tracing
489c9b5090e2 Initial load
duke
parents:
diff changeset
   495
    if (TraceExceptions) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   496
      ttyLocker ttyl;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   497
      ResourceMark rm;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   498
      tty->print_cr("Exception <%s> (0x%x) thrown in compiled method <%s> at PC " PTR_FORMAT " for thread 0x%x",
489c9b5090e2 Initial load
duke
parents:
diff changeset
   499
                    exception->print_value_string(), (address)exception(), nm->method()->print_value_string(), pc, thread);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   500
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   501
    // for AbortVMOnException flag
489c9b5090e2 Initial load
duke
parents:
diff changeset
   502
    NOT_PRODUCT(Exceptions::debug_check_abort(exception));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   503
489c9b5090e2 Initial load
duke
parents:
diff changeset
   504
    // Clear out the exception oop and pc since looking up an
489c9b5090e2 Initial load
duke
parents:
diff changeset
   505
    // exception handler can cause class loading, which might throw an
489c9b5090e2 Initial load
duke
parents:
diff changeset
   506
    // exception and those fields are expected to be clear during
489c9b5090e2 Initial load
duke
parents:
diff changeset
   507
    // normal bytecode execution.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   508
    thread->set_exception_oop(NULL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   509
    thread->set_exception_pc(NULL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   510
489c9b5090e2 Initial load
duke
parents:
diff changeset
   511
    continuation = SharedRuntime::compute_compiled_exc_handler(nm, pc, exception, false, false);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   512
    // If an exception was thrown during exception dispatch, the exception oop may have changed
489c9b5090e2 Initial load
duke
parents:
diff changeset
   513
    thread->set_exception_oop(exception());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   514
    thread->set_exception_pc(pc);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   515
489c9b5090e2 Initial load
duke
parents:
diff changeset
   516
    // the exception cache is used only by non-implicit exceptions
489c9b5090e2 Initial load
duke
parents:
diff changeset
   517
    if (continuation == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   518
      nm->add_handler_for_exception_and_pc(exception, pc, ExceptionCache::unwind_handler());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   519
    } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   520
      nm->add_handler_for_exception_and_pc(exception, pc, continuation);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   521
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   522
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   523
489c9b5090e2 Initial load
duke
parents:
diff changeset
   524
  thread->set_vm_result(exception());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   525
489c9b5090e2 Initial load
duke
parents:
diff changeset
   526
  if (TraceExceptions) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   527
    ttyLocker ttyl;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   528
    ResourceMark rm;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   529
    tty->print_cr("Thread " PTR_FORMAT " continuing at PC " PTR_FORMAT " for exception thrown at PC " PTR_FORMAT,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   530
                  thread, continuation, pc);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   531
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   532
489c9b5090e2 Initial load
duke
parents:
diff changeset
   533
  return continuation;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   534
JRT_END
489c9b5090e2 Initial load
duke
parents:
diff changeset
   535
489c9b5090e2 Initial load
duke
parents:
diff changeset
   536
// Enter this method from compiled code only if there is a Java exception handler
489c9b5090e2 Initial load
duke
parents:
diff changeset
   537
// in the method handling the exception
489c9b5090e2 Initial load
duke
parents:
diff changeset
   538
// We are entering here from exception stub. We don't do a normal VM transition here.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   539
// We do it in a helper. This is so we can check to see if the nmethod we have just
489c9b5090e2 Initial load
duke
parents:
diff changeset
   540
// searched for an exception handler has been deoptimized in the meantime.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   541
address  Runtime1::exception_handler_for_pc(JavaThread* thread) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   542
  oop exception = thread->exception_oop();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   543
  address pc = thread->exception_pc();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   544
  // Still in Java mode
489c9b5090e2 Initial load
duke
parents:
diff changeset
   545
  debug_only(ResetNoHandleMark rnhm);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   546
  nmethod* nm = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   547
  address continuation = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   548
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   549
    // Enter VM mode by calling the helper
489c9b5090e2 Initial load
duke
parents:
diff changeset
   550
489c9b5090e2 Initial load
duke
parents:
diff changeset
   551
    ResetNoHandleMark rnhm;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   552
    continuation = exception_handler_for_pc_helper(thread, exception, pc, nm);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   553
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   554
  // Back in JAVA, use no oops DON'T safepoint
489c9b5090e2 Initial load
duke
parents:
diff changeset
   555
489c9b5090e2 Initial load
duke
parents:
diff changeset
   556
  // Now check to see if the nmethod we were called from is now deoptimized.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   557
  // If so we must return to the deopt blob and deoptimize the nmethod
489c9b5090e2 Initial load
duke
parents:
diff changeset
   558
489c9b5090e2 Initial load
duke
parents:
diff changeset
   559
  if (nm != NULL && caller_is_deopted()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   560
    continuation = SharedRuntime::deopt_blob()->unpack_with_exception_in_tls();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   561
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   562
489c9b5090e2 Initial load
duke
parents:
diff changeset
   563
  return continuation;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   564
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   565
489c9b5090e2 Initial load
duke
parents:
diff changeset
   566
489c9b5090e2 Initial load
duke
parents:
diff changeset
   567
JRT_ENTRY(void, Runtime1::throw_range_check_exception(JavaThread* thread, int index))
489c9b5090e2 Initial load
duke
parents:
diff changeset
   568
  NOT_PRODUCT(_throw_range_check_exception_count++;)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   569
  Events::log("throw_range_check");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   570
  char message[jintAsStringSize];
489c9b5090e2 Initial load
duke
parents:
diff changeset
   571
  sprintf(message, "%d", index);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   572
  SharedRuntime::throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), message);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   573
JRT_END
489c9b5090e2 Initial load
duke
parents:
diff changeset
   574
489c9b5090e2 Initial load
duke
parents:
diff changeset
   575
489c9b5090e2 Initial load
duke
parents:
diff changeset
   576
JRT_ENTRY(void, Runtime1::throw_index_exception(JavaThread* thread, int index))
489c9b5090e2 Initial load
duke
parents:
diff changeset
   577
  NOT_PRODUCT(_throw_index_exception_count++;)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   578
  Events::log("throw_index");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   579
  char message[16];
489c9b5090e2 Initial load
duke
parents:
diff changeset
   580
  sprintf(message, "%d", index);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   581
  SharedRuntime::throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_IndexOutOfBoundsException(), message);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   582
JRT_END
489c9b5090e2 Initial load
duke
parents:
diff changeset
   583
489c9b5090e2 Initial load
duke
parents:
diff changeset
   584
489c9b5090e2 Initial load
duke
parents:
diff changeset
   585
JRT_ENTRY(void, Runtime1::throw_div0_exception(JavaThread* thread))
489c9b5090e2 Initial load
duke
parents:
diff changeset
   586
  NOT_PRODUCT(_throw_div0_exception_count++;)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   587
  SharedRuntime::throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_ArithmeticException(), "/ by zero");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   588
JRT_END
489c9b5090e2 Initial load
duke
parents:
diff changeset
   589
489c9b5090e2 Initial load
duke
parents:
diff changeset
   590
489c9b5090e2 Initial load
duke
parents:
diff changeset
   591
JRT_ENTRY(void, Runtime1::throw_null_pointer_exception(JavaThread* thread))
489c9b5090e2 Initial load
duke
parents:
diff changeset
   592
  NOT_PRODUCT(_throw_null_pointer_exception_count++;)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   593
  SharedRuntime::throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_NullPointerException());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   594
JRT_END
489c9b5090e2 Initial load
duke
parents:
diff changeset
   595
489c9b5090e2 Initial load
duke
parents:
diff changeset
   596
489c9b5090e2 Initial load
duke
parents:
diff changeset
   597
JRT_ENTRY(void, Runtime1::throw_class_cast_exception(JavaThread* thread, oopDesc* object))
489c9b5090e2 Initial load
duke
parents:
diff changeset
   598
  NOT_PRODUCT(_throw_class_cast_exception_count++;)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   599
  ResourceMark rm(thread);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   600
  char* message = SharedRuntime::generate_class_cast_message(
489c9b5090e2 Initial load
duke
parents:
diff changeset
   601
    thread, Klass::cast(object->klass())->external_name());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   602
  SharedRuntime::throw_and_post_jvmti_exception(
489c9b5090e2 Initial load
duke
parents:
diff changeset
   603
    thread, vmSymbols::java_lang_ClassCastException(), message);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   604
JRT_END
489c9b5090e2 Initial load
duke
parents:
diff changeset
   605
489c9b5090e2 Initial load
duke
parents:
diff changeset
   606
489c9b5090e2 Initial load
duke
parents:
diff changeset
   607
JRT_ENTRY(void, Runtime1::throw_incompatible_class_change_error(JavaThread* thread))
489c9b5090e2 Initial load
duke
parents:
diff changeset
   608
  NOT_PRODUCT(_throw_incompatible_class_change_error_count++;)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   609
  ResourceMark rm(thread);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   610
  SharedRuntime::throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_IncompatibleClassChangeError());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   611
JRT_END
489c9b5090e2 Initial load
duke
parents:
diff changeset
   612
489c9b5090e2 Initial load
duke
parents:
diff changeset
   613
489c9b5090e2 Initial load
duke
parents:
diff changeset
   614
JRT_ENTRY_NO_ASYNC(void, Runtime1::monitorenter(JavaThread* thread, oopDesc* obj, BasicObjectLock* lock))
489c9b5090e2 Initial load
duke
parents:
diff changeset
   615
  NOT_PRODUCT(_monitorenter_slowcase_cnt++;)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   616
  if (PrintBiasedLockingStatistics) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   617
    Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   618
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   619
  Handle h_obj(thread, obj);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   620
  assert(h_obj()->is_oop(), "must be NULL or an object");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   621
  if (UseBiasedLocking) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   622
    // Retry fast entry if bias is revoked to avoid unnecessary inflation
489c9b5090e2 Initial load
duke
parents:
diff changeset
   623
    ObjectSynchronizer::fast_enter(h_obj, lock->lock(), true, CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   624
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   625
    if (UseFastLocking) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   626
      // When using fast locking, the compiled code has already tried the fast case
489c9b5090e2 Initial load
duke
parents:
diff changeset
   627
      assert(obj == lock->obj(), "must match");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   628
      ObjectSynchronizer::slow_enter(h_obj, lock->lock(), THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   629
    } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   630
      lock->set_obj(obj);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   631
      ObjectSynchronizer::fast_enter(h_obj, lock->lock(), false, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   632
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   633
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   634
JRT_END
489c9b5090e2 Initial load
duke
parents:
diff changeset
   635
489c9b5090e2 Initial load
duke
parents:
diff changeset
   636
489c9b5090e2 Initial load
duke
parents:
diff changeset
   637
JRT_LEAF(void, Runtime1::monitorexit(JavaThread* thread, BasicObjectLock* lock))
489c9b5090e2 Initial load
duke
parents:
diff changeset
   638
  NOT_PRODUCT(_monitorexit_slowcase_cnt++;)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   639
  assert(thread == JavaThread::current(), "threads must correspond");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   640
  assert(thread->last_Java_sp(), "last_Java_sp must be set");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   641
  // monitorexit is non-blocking (leaf routine) => no exceptions can be thrown
489c9b5090e2 Initial load
duke
parents:
diff changeset
   642
  EXCEPTION_MARK;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   643
489c9b5090e2 Initial load
duke
parents:
diff changeset
   644
  oop obj = lock->obj();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   645
  assert(obj->is_oop(), "must be NULL or an object");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   646
  if (UseFastLocking) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   647
    // When using fast locking, the compiled code has already tried the fast case
489c9b5090e2 Initial load
duke
parents:
diff changeset
   648
    ObjectSynchronizer::slow_exit(obj, lock->lock(), THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   649
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   650
    ObjectSynchronizer::fast_exit(obj, lock->lock(), THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   651
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   652
JRT_END
489c9b5090e2 Initial load
duke
parents:
diff changeset
   653
489c9b5090e2 Initial load
duke
parents:
diff changeset
   654
489c9b5090e2 Initial load
duke
parents:
diff changeset
   655
static klassOop resolve_field_return_klass(methodHandle caller, int bci, TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   656
  Bytecode_field* field_access = Bytecode_field_at(caller(), caller->bcp_from(bci));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   657
  // This can be static or non-static field access
489c9b5090e2 Initial load
duke
parents:
diff changeset
   658
  Bytecodes::Code code       = field_access->code();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   659
489c9b5090e2 Initial load
duke
parents:
diff changeset
   660
  // We must load class, initialize class and resolvethe field
489c9b5090e2 Initial load
duke
parents:
diff changeset
   661
  FieldAccessInfo result; // initialize class if needed
489c9b5090e2 Initial load
duke
parents:
diff changeset
   662
  constantPoolHandle constants(THREAD, caller->constants());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   663
  LinkResolver::resolve_field(result, constants, field_access->index(), Bytecodes::java_code(code), false, CHECK_NULL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   664
  return result.klass()();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   665
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   666
489c9b5090e2 Initial load
duke
parents:
diff changeset
   667
489c9b5090e2 Initial load
duke
parents:
diff changeset
   668
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   669
// This routine patches sites where a class wasn't loaded or
489c9b5090e2 Initial load
duke
parents:
diff changeset
   670
// initialized at the time the code was generated.  It handles
489c9b5090e2 Initial load
duke
parents:
diff changeset
   671
// references to classes, fields and forcing of initialization.  Most
489c9b5090e2 Initial load
duke
parents:
diff changeset
   672
// of the cases are straightforward and involving simply forcing
489c9b5090e2 Initial load
duke
parents:
diff changeset
   673
// resolution of a class, rewriting the instruction stream with the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   674
// needed constant and replacing the call in this function with the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   675
// patched code.  The case for static field is more complicated since
489c9b5090e2 Initial load
duke
parents:
diff changeset
   676
// the thread which is in the process of initializing a class can
489c9b5090e2 Initial load
duke
parents:
diff changeset
   677
// access it's static fields but other threads can't so the code
489c9b5090e2 Initial load
duke
parents:
diff changeset
   678
// either has to deoptimize when this case is detected or execute a
489c9b5090e2 Initial load
duke
parents:
diff changeset
   679
// check that the current thread is the initializing thread.  The
489c9b5090e2 Initial load
duke
parents:
diff changeset
   680
// current
489c9b5090e2 Initial load
duke
parents:
diff changeset
   681
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   682
// Patches basically look like this:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   683
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   684
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   685
// patch_site: jmp patch stub     ;; will be patched
489c9b5090e2 Initial load
duke
parents:
diff changeset
   686
// continue:   ...
489c9b5090e2 Initial load
duke
parents:
diff changeset
   687
//             ...
489c9b5090e2 Initial load
duke
parents:
diff changeset
   688
//             ...
489c9b5090e2 Initial load
duke
parents:
diff changeset
   689
//             ...
489c9b5090e2 Initial load
duke
parents:
diff changeset
   690
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   691
// They have a stub which looks like this:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   692
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   693
//             ;; patch body
489c9b5090e2 Initial load
duke
parents:
diff changeset
   694
//             movl <const>, reg           (for class constants)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   695
//        <or> movl [reg1 + <const>], reg  (for field offsets)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   696
//        <or> movl reg, [reg1 + <const>]  (for field offsets)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   697
//             <being_init offset> <bytes to copy> <bytes to skip>
489c9b5090e2 Initial load
duke
parents:
diff changeset
   698
// patch_stub: call Runtime1::patch_code (through a runtime stub)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   699
//             jmp patch_site
489c9b5090e2 Initial load
duke
parents:
diff changeset
   700
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   701
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   702
// A normal patch is done by rewriting the patch body, usually a move,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   703
// and then copying it into place over top of the jmp instruction
489c9b5090e2 Initial load
duke
parents:
diff changeset
   704
// being careful to flush caches and doing it in an MP-safe way.  The
489c9b5090e2 Initial load
duke
parents:
diff changeset
   705
// constants following the patch body are used to find various pieces
489c9b5090e2 Initial load
duke
parents:
diff changeset
   706
// of the patch relative to the call site for Runtime1::patch_code.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   707
// The case for getstatic and putstatic is more complicated because
489c9b5090e2 Initial load
duke
parents:
diff changeset
   708
// getstatic and putstatic have special semantics when executing while
489c9b5090e2 Initial load
duke
parents:
diff changeset
   709
// the class is being initialized.  getstatic/putstatic on a class
489c9b5090e2 Initial load
duke
parents:
diff changeset
   710
// which is being_initialized may be executed by the initializing
489c9b5090e2 Initial load
duke
parents:
diff changeset
   711
// thread but other threads have to block when they execute it.  This
489c9b5090e2 Initial load
duke
parents:
diff changeset
   712
// is accomplished in compiled code by executing a test of the current
489c9b5090e2 Initial load
duke
parents:
diff changeset
   713
// thread against the initializing thread of the class.  It's emitted
489c9b5090e2 Initial load
duke
parents:
diff changeset
   714
// as boilerplate in their stub which allows the patched code to be
489c9b5090e2 Initial load
duke
parents:
diff changeset
   715
// executed before it's copied back into the main body of the nmethod.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   716
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   717
// being_init: get_thread(<tmp reg>
489c9b5090e2 Initial load
duke
parents:
diff changeset
   718
//             cmpl [reg1 + <init_thread_offset>], <tmp reg>
489c9b5090e2 Initial load
duke
parents:
diff changeset
   719
//             jne patch_stub
489c9b5090e2 Initial load
duke
parents:
diff changeset
   720
//             movl [reg1 + <const>], reg  (for field offsets)  <or>
489c9b5090e2 Initial load
duke
parents:
diff changeset
   721
//             movl reg, [reg1 + <const>]  (for field offsets)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   722
//             jmp continue
489c9b5090e2 Initial load
duke
parents:
diff changeset
   723
//             <being_init offset> <bytes to copy> <bytes to skip>
489c9b5090e2 Initial load
duke
parents:
diff changeset
   724
// patch_stub: jmp Runtim1::patch_code (through a runtime stub)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   725
//             jmp patch_site
489c9b5090e2 Initial load
duke
parents:
diff changeset
   726
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   727
// If the class is being initialized the patch body is rewritten and
489c9b5090e2 Initial load
duke
parents:
diff changeset
   728
// the patch site is rewritten to jump to being_init, instead of
489c9b5090e2 Initial load
duke
parents:
diff changeset
   729
// patch_stub.  Whenever this code is executed it checks the current
489c9b5090e2 Initial load
duke
parents:
diff changeset
   730
// thread against the intializing thread so other threads will enter
489c9b5090e2 Initial load
duke
parents:
diff changeset
   731
// the runtime and end up blocked waiting the class to finish
489c9b5090e2 Initial load
duke
parents:
diff changeset
   732
// initializing inside the calls to resolve_field below.  The
489c9b5090e2 Initial load
duke
parents:
diff changeset
   733
// initializing class will continue on it's way.  Once the class is
489c9b5090e2 Initial load
duke
parents:
diff changeset
   734
// fully_initialized, the intializing_thread of the class becomes
489c9b5090e2 Initial load
duke
parents:
diff changeset
   735
// NULL, so the next thread to execute this code will fail the test,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   736
// call into patch_code and complete the patching process by copying
489c9b5090e2 Initial load
duke
parents:
diff changeset
   737
// the patch body back into the main part of the nmethod and resume
489c9b5090e2 Initial load
duke
parents:
diff changeset
   738
// executing.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   739
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   740
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   741
489c9b5090e2 Initial load
duke
parents:
diff changeset
   742
JRT_ENTRY(void, Runtime1::patch_code(JavaThread* thread, Runtime1::StubID stub_id ))
489c9b5090e2 Initial load
duke
parents:
diff changeset
   743
  NOT_PRODUCT(_patch_code_slowcase_cnt++;)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   744
489c9b5090e2 Initial load
duke
parents:
diff changeset
   745
  ResourceMark rm(thread);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   746
  RegisterMap reg_map(thread, false);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   747
  frame runtime_frame = thread->last_frame();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   748
  frame caller_frame = runtime_frame.sender(&reg_map);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   749
489c9b5090e2 Initial load
duke
parents:
diff changeset
   750
  // last java frame on stack
489c9b5090e2 Initial load
duke
parents:
diff changeset
   751
  vframeStream vfst(thread, true);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   752
  assert(!vfst.at_end(), "Java frame must exist");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   753
489c9b5090e2 Initial load
duke
parents:
diff changeset
   754
  methodHandle caller_method(THREAD, vfst.method());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   755
  // Note that caller_method->code() may not be same as caller_code because of OSR's
489c9b5090e2 Initial load
duke
parents:
diff changeset
   756
  // Note also that in the presence of inlining it is not guaranteed
489c9b5090e2 Initial load
duke
parents:
diff changeset
   757
  // that caller_method() == caller_code->method()
489c9b5090e2 Initial load
duke
parents:
diff changeset
   758
489c9b5090e2 Initial load
duke
parents:
diff changeset
   759
489c9b5090e2 Initial load
duke
parents:
diff changeset
   760
  int bci = vfst.bci();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   761
489c9b5090e2 Initial load
duke
parents:
diff changeset
   762
  Events::log("patch_code @ " INTPTR_FORMAT , caller_frame.pc());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   763
489c9b5090e2 Initial load
duke
parents:
diff changeset
   764
  Bytecodes::Code code = Bytecode_at(caller_method->bcp_from(bci))->java_code();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   765
489c9b5090e2 Initial load
duke
parents:
diff changeset
   766
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   767
  // this is used by assertions in the access_field_patching_id
489c9b5090e2 Initial load
duke
parents:
diff changeset
   768
  BasicType patch_field_type = T_ILLEGAL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   769
#endif // PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   770
  bool deoptimize_for_volatile = false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   771
  int patch_field_offset = -1;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   772
  KlassHandle init_klass(THREAD, klassOop(NULL)); // klass needed by access_field_patching code
489c9b5090e2 Initial load
duke
parents:
diff changeset
   773
  Handle load_klass(THREAD, NULL);                // oop needed by load_klass_patching code
489c9b5090e2 Initial load
duke
parents:
diff changeset
   774
  if (stub_id == Runtime1::access_field_patching_id) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   775
489c9b5090e2 Initial load
duke
parents:
diff changeset
   776
    Bytecode_field* field_access = Bytecode_field_at(caller_method(), caller_method->bcp_from(bci));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   777
    FieldAccessInfo result; // initialize class if needed
489c9b5090e2 Initial load
duke
parents:
diff changeset
   778
    Bytecodes::Code code = field_access->code();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   779
    constantPoolHandle constants(THREAD, caller_method->constants());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   780
    LinkResolver::resolve_field(result, constants, field_access->index(), Bytecodes::java_code(code), false, CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   781
    patch_field_offset = result.field_offset();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   782
489c9b5090e2 Initial load
duke
parents:
diff changeset
   783
    // If we're patching a field which is volatile then at compile it
489c9b5090e2 Initial load
duke
parents:
diff changeset
   784
    // must not have been know to be volatile, so the generated code
489c9b5090e2 Initial load
duke
parents:
diff changeset
   785
    // isn't correct for a volatile reference.  The nmethod has to be
489c9b5090e2 Initial load
duke
parents:
diff changeset
   786
    // deoptimized so that the code can be regenerated correctly.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   787
    // This check is only needed for access_field_patching since this
489c9b5090e2 Initial load
duke
parents:
diff changeset
   788
    // is the path for patching field offsets.  load_klass is only
489c9b5090e2 Initial load
duke
parents:
diff changeset
   789
    // used for patching references to oops which don't need special
489c9b5090e2 Initial load
duke
parents:
diff changeset
   790
    // handling in the volatile case.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   791
    deoptimize_for_volatile = result.access_flags().is_volatile();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   792
489c9b5090e2 Initial load
duke
parents:
diff changeset
   793
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   794
    patch_field_type = result.field_type();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   795
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
   796
  } else if (stub_id == Runtime1::load_klass_patching_id) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   797
    oop k;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   798
    switch (code) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   799
      case Bytecodes::_putstatic:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   800
      case Bytecodes::_getstatic:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   801
        { klassOop klass = resolve_field_return_klass(caller_method, bci, CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   802
          // Save a reference to the class that has to be checked for initialization
489c9b5090e2 Initial load
duke
parents:
diff changeset
   803
          init_klass = KlassHandle(THREAD, klass);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   804
          k = klass;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   805
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   806
        break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   807
      case Bytecodes::_new:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   808
        { Bytecode_new* bnew = Bytecode_new_at(caller_method->bcp_from(bci));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   809
          k = caller_method->constants()->klass_at(bnew->index(), CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   810
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   811
        break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   812
      case Bytecodes::_multianewarray:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   813
        { Bytecode_multianewarray* mna = Bytecode_multianewarray_at(caller_method->bcp_from(bci));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   814
          k = caller_method->constants()->klass_at(mna->index(), CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   815
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   816
        break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   817
      case Bytecodes::_instanceof:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   818
        { Bytecode_instanceof* io = Bytecode_instanceof_at(caller_method->bcp_from(bci));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   819
          k = caller_method->constants()->klass_at(io->index(), CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   820
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   821
        break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   822
      case Bytecodes::_checkcast:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   823
        { Bytecode_checkcast* cc = Bytecode_checkcast_at(caller_method->bcp_from(bci));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   824
          k = caller_method->constants()->klass_at(cc->index(), CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   825
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   826
        break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   827
      case Bytecodes::_anewarray:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   828
        { Bytecode_anewarray* anew = Bytecode_anewarray_at(caller_method->bcp_from(bci));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   829
          klassOop ek = caller_method->constants()->klass_at(anew->index(), CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   830
          k = Klass::cast(ek)->array_klass(CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   831
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   832
        break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   833
      case Bytecodes::_ldc:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   834
      case Bytecodes::_ldc_w:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   835
        {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   836
          Bytecode_loadconstant* cc = Bytecode_loadconstant_at(caller_method(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
   837
                                                               caller_method->bcp_from(bci));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   838
          klassOop resolved = caller_method->constants()->klass_at(cc->index(), CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   839
          // ldc wants the java mirror.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   840
          k = resolved->klass_part()->java_mirror();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   841
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   842
        break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   843
      default: Unimplemented();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   844
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   845
    // convert to handle
489c9b5090e2 Initial load
duke
parents:
diff changeset
   846
    load_klass = Handle(THREAD, k);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   847
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   848
    ShouldNotReachHere();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   849
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   850
489c9b5090e2 Initial load
duke
parents:
diff changeset
   851
  if (deoptimize_for_volatile) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   852
    // At compile time we assumed the field wasn't volatile but after
489c9b5090e2 Initial load
duke
parents:
diff changeset
   853
    // loading it turns out it was volatile so we have to throw the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   854
    // compiled code out and let it be regenerated.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   855
    if (TracePatching) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   856
      tty->print_cr("Deoptimizing for patching volatile field reference");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   857
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   858
    VM_DeoptimizeFrame deopt(thread, caller_frame.id());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   859
    VMThread::execute(&deopt);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   860
489c9b5090e2 Initial load
duke
parents:
diff changeset
   861
    // Return to the now deoptimized frame.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   862
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   863
489c9b5090e2 Initial load
duke
parents:
diff changeset
   864
489c9b5090e2 Initial load
duke
parents:
diff changeset
   865
  // Now copy code back
489c9b5090e2 Initial load
duke
parents:
diff changeset
   866
489c9b5090e2 Initial load
duke
parents:
diff changeset
   867
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   868
    MutexLockerEx ml_patch (Patching_lock, Mutex::_no_safepoint_check_flag);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   869
    //
489c9b5090e2 Initial load
duke
parents:
diff changeset
   870
    // Deoptimization may have happened while we waited for the lock.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   871
    // In that case we don't bother to do any patching we just return
489c9b5090e2 Initial load
duke
parents:
diff changeset
   872
    // and let the deopt happen
489c9b5090e2 Initial load
duke
parents:
diff changeset
   873
    if (!caller_is_deopted()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   874
      NativeGeneralJump* jump = nativeGeneralJump_at(caller_frame.pc());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   875
      address instr_pc = jump->jump_destination();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   876
      NativeInstruction* ni = nativeInstruction_at(instr_pc);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   877
      if (ni->is_jump() ) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   878
        // the jump has not been patched yet
489c9b5090e2 Initial load
duke
parents:
diff changeset
   879
        // The jump destination is slow case and therefore not part of the stubs
489c9b5090e2 Initial load
duke
parents:
diff changeset
   880
        // (stubs are only for StaticCalls)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   881
489c9b5090e2 Initial load
duke
parents:
diff changeset
   882
        // format of buffer
489c9b5090e2 Initial load
duke
parents:
diff changeset
   883
        //    ....
489c9b5090e2 Initial load
duke
parents:
diff changeset
   884
        //    instr byte 0     <-- copy_buff
489c9b5090e2 Initial load
duke
parents:
diff changeset
   885
        //    instr byte 1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   886
        //    ..
489c9b5090e2 Initial load
duke
parents:
diff changeset
   887
        //    instr byte n-1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   888
        //      n
489c9b5090e2 Initial load
duke
parents:
diff changeset
   889
        //    ....             <-- call destination
489c9b5090e2 Initial load
duke
parents:
diff changeset
   890
489c9b5090e2 Initial load
duke
parents:
diff changeset
   891
        address stub_location = caller_frame.pc() + PatchingStub::patch_info_offset();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   892
        unsigned char* byte_count = (unsigned char*) (stub_location - 1);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   893
        unsigned char* byte_skip = (unsigned char*) (stub_location - 2);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   894
        unsigned char* being_initialized_entry_offset = (unsigned char*) (stub_location - 3);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   895
        address copy_buff = stub_location - *byte_skip - *byte_count;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   896
        address being_initialized_entry = stub_location - *being_initialized_entry_offset;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   897
        if (TracePatching) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   898
          tty->print_cr(" Patching %s at bci %d at address 0x%x  (%s)", Bytecodes::name(code), bci,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   899
                        instr_pc, (stub_id == Runtime1::access_field_patching_id) ? "field" : "klass");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   900
          nmethod* caller_code = CodeCache::find_nmethod(caller_frame.pc());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   901
          assert(caller_code != NULL, "nmethod not found");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   902
489c9b5090e2 Initial load
duke
parents:
diff changeset
   903
          // NOTE we use pc() not original_pc() because we already know they are
489c9b5090e2 Initial load
duke
parents:
diff changeset
   904
          // identical otherwise we'd have never entered this block of code
489c9b5090e2 Initial load
duke
parents:
diff changeset
   905
489c9b5090e2 Initial load
duke
parents:
diff changeset
   906
          OopMap* map = caller_code->oop_map_for_return_address(caller_frame.pc());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   907
          assert(map != NULL, "null check");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   908
          map->print();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   909
          tty->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   910
489c9b5090e2 Initial load
duke
parents:
diff changeset
   911
          Disassembler::decode(copy_buff, copy_buff + *byte_count, tty);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   912
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   913
        // depending on the code below, do_patch says whether to copy the patch body back into the nmethod
489c9b5090e2 Initial load
duke
parents:
diff changeset
   914
        bool do_patch = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   915
        if (stub_id == Runtime1::access_field_patching_id) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   916
          // The offset may not be correct if the class was not loaded at code generation time.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   917
          // Set it now.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   918
          NativeMovRegMem* n_move = nativeMovRegMem_at(copy_buff);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   919
          assert(n_move->offset() == 0 || (n_move->offset() == 4 && (patch_field_type == T_DOUBLE || patch_field_type == T_LONG)), "illegal offset for type");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   920
          assert(patch_field_offset >= 0, "illegal offset");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   921
          n_move->add_offset_in_bytes(patch_field_offset);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   922
        } else if (stub_id == Runtime1::load_klass_patching_id) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   923
          // If a getstatic or putstatic is referencing a klass which
489c9b5090e2 Initial load
duke
parents:
diff changeset
   924
          // isn't fully initialized, the patch body isn't copied into
489c9b5090e2 Initial load
duke
parents:
diff changeset
   925
          // place until initialization is complete.  In this case the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   926
          // patch site is setup so that any threads besides the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   927
          // initializing thread are forced to come into the VM and
489c9b5090e2 Initial load
duke
parents:
diff changeset
   928
          // block.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   929
          do_patch = (code != Bytecodes::_getstatic && code != Bytecodes::_putstatic) ||
489c9b5090e2 Initial load
duke
parents:
diff changeset
   930
                     instanceKlass::cast(init_klass())->is_initialized();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   931
          NativeGeneralJump* jump = nativeGeneralJump_at(instr_pc);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   932
          if (jump->jump_destination() == being_initialized_entry) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   933
            assert(do_patch == true, "initialization must be complete at this point");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   934
          } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   935
            // patch the instruction <move reg, klass>
489c9b5090e2 Initial load
duke
parents:
diff changeset
   936
            NativeMovConstReg* n_copy = nativeMovConstReg_at(copy_buff);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   937
            assert(n_copy->data() == 0, "illegal init value");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   938
            assert(load_klass() != NULL, "klass not set");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   939
            n_copy->set_data((intx) (load_klass()));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   940
489c9b5090e2 Initial load
duke
parents:
diff changeset
   941
            if (TracePatching) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   942
              Disassembler::decode(copy_buff, copy_buff + *byte_count, tty);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   943
            }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   944
489c9b5090e2 Initial load
duke
parents:
diff changeset
   945
#ifdef SPARC
489c9b5090e2 Initial load
duke
parents:
diff changeset
   946
            // Update the oop location in the nmethod with the proper
489c9b5090e2 Initial load
duke
parents:
diff changeset
   947
            // oop.  When the code was generated, a NULL was stuffed
489c9b5090e2 Initial load
duke
parents:
diff changeset
   948
            // in the oop table and that table needs to be update to
489c9b5090e2 Initial load
duke
parents:
diff changeset
   949
            // have the right value.  On intel the value is kept
489c9b5090e2 Initial load
duke
parents:
diff changeset
   950
            // directly in the instruction instead of in the oop
489c9b5090e2 Initial load
duke
parents:
diff changeset
   951
            // table, so set_data above effectively updated the value.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   952
            nmethod* nm = CodeCache::find_nmethod(instr_pc);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   953
            assert(nm != NULL, "invalid nmethod_pc");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   954
            RelocIterator oops(nm, copy_buff, copy_buff + 1);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   955
            bool found = false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   956
            while (oops.next() && !found) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   957
              if (oops.type() == relocInfo::oop_type) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   958
                oop_Relocation* r = oops.oop_reloc();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   959
                oop* oop_adr = r->oop_addr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   960
                *oop_adr = load_klass();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   961
                r->fix_oop_relocation();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   962
                found = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   963
              }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   964
            }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   965
            assert(found, "the oop must exist!");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   966
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
   967
489c9b5090e2 Initial load
duke
parents:
diff changeset
   968
          }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   969
        } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   970
          ShouldNotReachHere();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   971
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   972
        if (do_patch) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   973
          // replace instructions
489c9b5090e2 Initial load
duke
parents:
diff changeset
   974
          // first replace the tail, then the call
489c9b5090e2 Initial load
duke
parents:
diff changeset
   975
          for (int i = NativeCall::instruction_size; i < *byte_count; i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   976
            address ptr = copy_buff + i;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   977
            int a_byte = (*ptr) & 0xFF;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   978
            address dst = instr_pc + i;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   979
            *(unsigned char*)dst = (unsigned char) a_byte;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   980
          }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   981
          ICache::invalidate_range(instr_pc, *byte_count);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   982
          NativeGeneralJump::replace_mt_safe(instr_pc, copy_buff);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   983
489c9b5090e2 Initial load
duke
parents:
diff changeset
   984
          if (stub_id == Runtime1::load_klass_patching_id) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   985
            // update relocInfo to oop
489c9b5090e2 Initial load
duke
parents:
diff changeset
   986
            nmethod* nm = CodeCache::find_nmethod(instr_pc);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   987
            assert(nm != NULL, "invalid nmethod_pc");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   988
489c9b5090e2 Initial load
duke
parents:
diff changeset
   989
            // The old patch site is now a move instruction so update
489c9b5090e2 Initial load
duke
parents:
diff changeset
   990
            // the reloc info so that it will get updated during
489c9b5090e2 Initial load
duke
parents:
diff changeset
   991
            // future GCs.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   992
            RelocIterator iter(nm, (address)instr_pc, (address)(instr_pc + 1));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   993
            relocInfo::change_reloc_info_for_address(&iter, (address) instr_pc,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   994
                                                     relocInfo::none, relocInfo::oop_type);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   995
#ifdef SPARC
489c9b5090e2 Initial load
duke
parents:
diff changeset
   996
            // Sparc takes two relocations for an oop so update the second one.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   997
            address instr_pc2 = instr_pc + NativeMovConstReg::add_offset;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   998
            RelocIterator iter2(nm, instr_pc2, instr_pc2 + 1);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   999
            relocInfo::change_reloc_info_for_address(&iter2, (address) instr_pc2,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1000
                                                     relocInfo::none, relocInfo::oop_type);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1001
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1002
          }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1003
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1004
        } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1005
          ICache::invalidate_range(copy_buff, *byte_count);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1006
          NativeGeneralJump::insert_unconditional(instr_pc, being_initialized_entry);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1007
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1008
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1009
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1010
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1011
JRT_END
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1012
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1013
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1014
// Entry point for compiled code. We want to patch a nmethod.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1015
// We don't do a normal VM transition here because we want to
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1016
// know after the patching is complete and any safepoint(s) are taken
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1017
// if the calling nmethod was deoptimized. We do this by calling a
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1018
// helper method which does the normal VM transition and when it
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1019
// completes we can check for deoptimization. This simplifies the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1020
// assembly code in the cpu directories.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1021
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1022
int Runtime1::move_klass_patching(JavaThread* thread) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1023
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1024
// NOTE: we are still in Java
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1025
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1026
  Thread* THREAD = thread;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1027
  debug_only(NoHandleMark nhm;)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1028
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1029
    // Enter VM mode
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1030
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1031
    ResetNoHandleMark rnhm;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1032
    patch_code(thread, load_klass_patching_id);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1033
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1034
  // Back in JAVA, use no oops DON'T safepoint
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1035
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1036
  // Return true if calling code is deoptimized
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1037
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1038
  return caller_is_deopted();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1039
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1040
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1041
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1042
// Entry point for compiled code. We want to patch a nmethod.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1043
// We don't do a normal VM transition here because we want to
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1044
// know after the patching is complete and any safepoint(s) are taken
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1045
// if the calling nmethod was deoptimized. We do this by calling a
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1046
// helper method which does the normal VM transition and when it
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1047
// completes we can check for deoptimization. This simplifies the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1048
// assembly code in the cpu directories.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1049
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1050
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1051
int Runtime1::access_field_patching(JavaThread* thread) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1052
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1053
// NOTE: we are still in Java
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1054
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1055
  Thread* THREAD = thread;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1056
  debug_only(NoHandleMark nhm;)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1057
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1058
    // Enter VM mode
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1059
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1060
    ResetNoHandleMark rnhm;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1061
    patch_code(thread, access_field_patching_id);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1062
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1063
  // Back in JAVA, use no oops DON'T safepoint
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1064
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1065
  // Return true if calling code is deoptimized
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1066
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1067
  return caller_is_deopted();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1068
JRT_END
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1069
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1070
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1071
JRT_LEAF(void, Runtime1::trace_block_entry(jint block_id))
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1072
  // for now we just print out the block id
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1073
  tty->print("%d ", block_id);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1074
JRT_END
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1075
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1076
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1077
// fast and direct copy of arrays; returning -1, means that an exception may be thrown
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1078
// and we did not copy anything
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1079
JRT_LEAF(int, Runtime1::arraycopy(oopDesc* src, int src_pos, oopDesc* dst, int dst_pos, int length))
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1080
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1081
  _generic_arraycopy_cnt++;        // Slow-path oop array copy
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1082
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1083
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1084
  enum {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1085
    ac_failed = -1, // arraycopy failed
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1086
    ac_ok = 0       // arraycopy succeeded
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1087
  };
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1088
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1089
  if (src == NULL || dst == NULL || src_pos < 0 || dst_pos < 0 || length < 0) return ac_failed;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1090
  if (!dst->is_array() || !src->is_array()) return ac_failed;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1091
  if ((unsigned int) arrayOop(src)->length() < (unsigned int)src_pos + (unsigned int)length) return ac_failed;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1092
  if ((unsigned int) arrayOop(dst)->length() < (unsigned int)dst_pos + (unsigned int)length) return ac_failed;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1093
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1094
  if (length == 0) return ac_ok;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1095
  if (src->is_typeArray()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1096
    const klassOop klass_oop = src->klass();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1097
    if (klass_oop != dst->klass()) return ac_failed;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1098
    typeArrayKlass* klass = typeArrayKlass::cast(klass_oop);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1099
    const int l2es = klass->log2_element_size();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1100
    const int ihs = klass->array_header_in_bytes() / wordSize;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1101
    char* src_addr = (char*) ((oopDesc**)src + ihs) + (src_pos << l2es);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1102
    char* dst_addr = (char*) ((oopDesc**)dst + ihs) + (dst_pos << l2es);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1103
    // Potential problem: memmove is not guaranteed to be word atomic
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1104
    // Revisit in Merlin
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1105
    memmove(dst_addr, src_addr, length << l2es);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1106
    return ac_ok;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1107
  } else if (src->is_objArray() && dst->is_objArray()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1108
    oop* src_addr = objArrayOop(src)->obj_at_addr(src_pos);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1109
    oop* dst_addr = objArrayOop(dst)->obj_at_addr(dst_pos);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1110
    // For performance reasons, we assume we are using a card marking write
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1111
    // barrier. The assert will fail if this is not the case.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1112
    // Note that we use the non-virtual inlineable variant of write_ref_array.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1113
    BarrierSet* bs = Universe::heap()->barrier_set();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1114
    assert(bs->has_write_ref_array_opt(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1115
           "Barrier set must have ref array opt");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1116
    if (src == dst) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1117
      // same object, no check
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1118
      Copy::conjoint_oops_atomic(src_addr, dst_addr, length);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1119
      bs->write_ref_array(MemRegion((HeapWord*)dst_addr,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1120
                                    (HeapWord*)(dst_addr + length)));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1121
      return ac_ok;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1122
    } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1123
      klassOop bound = objArrayKlass::cast(dst->klass())->element_klass();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1124
      klassOop stype = objArrayKlass::cast(src->klass())->element_klass();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1125
      if (stype == bound || Klass::cast(stype)->is_subtype_of(bound)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1126
        // Elements are guaranteed to be subtypes, so no check necessary
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1127
        Copy::conjoint_oops_atomic(src_addr, dst_addr, length);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1128
        bs->write_ref_array(MemRegion((HeapWord*)dst_addr,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1129
                                      (HeapWord*)(dst_addr + length)));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1130
        return ac_ok;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1131
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1132
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1133
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1134
  return ac_failed;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1135
JRT_END
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1136
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1137
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1138
JRT_LEAF(void, Runtime1::primitive_arraycopy(HeapWord* src, HeapWord* dst, int length))
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1139
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1140
  _primitive_arraycopy_cnt++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1141
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1142
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1143
  if (length == 0) return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1144
  // Not guaranteed to be word atomic, but that doesn't matter
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1145
  // for anything but an oop array, which is covered by oop_arraycopy.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1146
  Copy::conjoint_bytes(src, dst, length);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1147
JRT_END
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1148
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1149
JRT_LEAF(void, Runtime1::oop_arraycopy(HeapWord* src, HeapWord* dst, int num))
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1150
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1151
  _oop_arraycopy_cnt++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1152
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1153
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1154
  if (num == 0) return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1155
  Copy::conjoint_oops_atomic((oop*) src, (oop*) dst, num);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1156
  BarrierSet* bs = Universe::heap()->barrier_set();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1157
  bs->write_ref_array(MemRegion(dst, dst + num));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1158
JRT_END
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1159
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1160
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1161
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1162
void Runtime1::print_statistics() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1163
  tty->print_cr("C1 Runtime statistics:");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1164
  tty->print_cr(" _resolve_invoke_virtual_cnt:     %d", SharedRuntime::_resolve_virtual_ctr);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1165
  tty->print_cr(" _resolve_invoke_opt_virtual_cnt: %d", SharedRuntime::_resolve_opt_virtual_ctr);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1166
  tty->print_cr(" _resolve_invoke_static_cnt:      %d", SharedRuntime::_resolve_static_ctr);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1167
  tty->print_cr(" _handle_wrong_method_cnt:        %d", SharedRuntime::_wrong_method_ctr);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1168
  tty->print_cr(" _ic_miss_cnt:                    %d", SharedRuntime::_ic_miss_ctr);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1169
  tty->print_cr(" _generic_arraycopy_cnt:          %d", _generic_arraycopy_cnt);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1170
  tty->print_cr(" _primitive_arraycopy_cnt:        %d", _primitive_arraycopy_cnt);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1171
  tty->print_cr(" _oop_arraycopy_cnt:              %d", _oop_arraycopy_cnt);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1172
  tty->print_cr(" _arraycopy_slowcase_cnt:         %d", _arraycopy_slowcase_cnt);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1173
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1174
  tty->print_cr(" _new_type_array_slowcase_cnt:    %d", _new_type_array_slowcase_cnt);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1175
  tty->print_cr(" _new_object_array_slowcase_cnt:  %d", _new_object_array_slowcase_cnt);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1176
  tty->print_cr(" _new_instance_slowcase_cnt:      %d", _new_instance_slowcase_cnt);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1177
  tty->print_cr(" _new_multi_array_slowcase_cnt:   %d", _new_multi_array_slowcase_cnt);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1178
  tty->print_cr(" _monitorenter_slowcase_cnt:      %d", _monitorenter_slowcase_cnt);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1179
  tty->print_cr(" _monitorexit_slowcase_cnt:       %d", _monitorexit_slowcase_cnt);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1180
  tty->print_cr(" _patch_code_slowcase_cnt:        %d", _patch_code_slowcase_cnt);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1181
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1182
  tty->print_cr(" _throw_range_check_exception_count:            %d:", _throw_range_check_exception_count);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1183
  tty->print_cr(" _throw_index_exception_count:                  %d:", _throw_index_exception_count);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1184
  tty->print_cr(" _throw_div0_exception_count:                   %d:", _throw_div0_exception_count);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1185
  tty->print_cr(" _throw_null_pointer_exception_count:           %d:", _throw_null_pointer_exception_count);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1186
  tty->print_cr(" _throw_class_cast_exception_count:             %d:", _throw_class_cast_exception_count);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1187
  tty->print_cr(" _throw_incompatible_class_change_error_count:  %d:", _throw_incompatible_class_change_error_count);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1188
  tty->print_cr(" _throw_array_store_exception_count:            %d:", _throw_array_store_exception_count);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1189
  tty->print_cr(" _throw_count:                                  %d:", _throw_count);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1190
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1191
  SharedRuntime::print_ic_miss_histogram();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1192
  tty->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1193
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1194
#endif // PRODUCT