Mercurial > jdk8-mips64-public > hotspot / file revision

 /*

  * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved.

  * Copyright 2008, 2009 Red Hat, Inc.

  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

  *

  * This code is free software; you can redistribute it and/or modify it

  * under the terms of the GNU General Public License version 2 only, as

  * published by the Free Software Foundation.

  *

  * This code is distributed in the hope that it will be useful, but WITHOUT

  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

  * version 2 for more details (a copy is included in the LICENSE file that

  * accompanied this code).

  *

  * You should have received a copy of the GNU General Public License version

  * 2 along with this work; if not, write to the Free Software Foundation,

  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

  *

  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

  * or visit www.oracle.com if you need additional information or have any

  * questions.

  *

  */

 #include "precompiled.hpp"

 #include "ci/ciMethod.hpp"

 #include "code/debugInfoRec.hpp"

 #include "shark/llvmValue.hpp"

 #include "shark/sharkBuilder.hpp"

 #include "shark/sharkCacheDecache.hpp"

 #include "shark/sharkFunction.hpp"

 #include "shark/sharkState.hpp"

 using namespace llvm;

 void SharkDecacher::start_frame() {

   // Start recording the debug information

   _pc_offset = code_buffer()->create_unique_offset();

   _oopmap = new OopMap(

     oopmap_slot_munge(stack()->oopmap_frame_size()),

     oopmap_slot_munge(arg_size()));

   debug_info()->add_safepoint(pc_offset(), oopmap());

 }

 void SharkDecacher::start_stack(int stack_depth) {

   // Create the array we'll record our stack slots in

   _exparray = new GrowableArray<ScopeValue*>(stack_depth);

   // Set the stack pointer

   stack()->CreateStoreStackPointer(

     builder()->CreatePtrToInt(

       stack()->slot_addr(

         stack()->stack_slots_offset() + max_stack() - stack_depth),

       SharkType::intptr_type()));

 }

 void SharkDecacher::process_stack_slot(int          index,

                                        SharkValue** addr,

                                        int          offset) {

   SharkValue *value = *addr;

   // Write the value to the frame if necessary

   if (stack_slot_needs_write(index, value)) {

     write_value_to_frame(

       SharkType::to_stackType(value->basic_type()),

       value->generic_value(),

       adjusted_offset(value, offset));

   }

   // Record the value in the oopmap if necessary

   if (stack_slot_needs_oopmap(index, value)) {

     oopmap()->set_oop(slot2reg(offset));

   }

   // Record the value in the debuginfo if necessary

   if (stack_slot_needs_debuginfo(index, value)) {

     exparray()->append(slot2lv(offset, stack_location_type(index, addr)));

   }

 }

 void SharkDecacher::start_monitors(int num_monitors) {

   // Create the array we'll record our monitors in

   _monarray = new GrowableArray<MonitorValue*>(num_monitors);

 }

 void SharkDecacher::process_monitor(int index, int box_offset, int obj_offset) {

   oopmap()->set_oop(slot2reg(obj_offset));

   monarray()->append(new MonitorValue(

     slot2lv (obj_offset, Location::oop),

     slot2loc(box_offset, Location::normal)));

 }

 void SharkDecacher::process_oop_tmp_slot(Value** value, int offset) {

   // Decache the temporary oop slot

   if (*value) {

     write_value_to_frame(

       SharkType::oop_type(),

       *value,

       offset);

     oopmap()->set_oop(slot2reg(offset));

   }

 }

 void SharkDecacher::process_method_slot(Value** value, int offset) {

   // Decache the method pointer

   write_value_to_frame(

     SharkType::Method_type(),

     *value,

     offset);

 }

 void SharkDecacher::process_pc_slot(int offset) {

   // Record the PC

   builder()->CreateStore(

     builder()->code_buffer_address(pc_offset()),

     stack()->slot_addr(offset));

 }

 void SharkDecacher::start_locals() {

   // Create the array we'll record our local variables in

   _locarray = new GrowableArray<ScopeValue*>(max_locals());}

 void SharkDecacher::process_local_slot(int          index,

                                        SharkValue** addr,

                                        int          offset) {

   SharkValue *value = *addr;

   // Write the value to the frame if necessary

   if (local_slot_needs_write(index, value)) {

     write_value_to_frame(

       SharkType::to_stackType(value->basic_type()),

       value->generic_value(),

       adjusted_offset(value, offset));

   }

   // Record the value in the oopmap if necessary

   if (local_slot_needs_oopmap(index, value)) {

     oopmap()->set_oop(slot2reg(offset));

   }

   // Record the value in the debuginfo if necessary

   if (local_slot_needs_debuginfo(index, value)) {

     locarray()->append(slot2lv(offset, local_location_type(index, addr)));

   }

 }

 void SharkDecacher::end_frame() {

   // Record the scope

   debug_info()->describe_scope(

     pc_offset(),

     target(),

     bci(),

     true,

     false,

     false,

     debug_info()->create_scope_values(locarray()),

     debug_info()->create_scope_values(exparray()),

     debug_info()->create_monitor_values(monarray()));

   // Finish recording the debug information

   debug_info()->end_safepoint(pc_offset());

 }

 void SharkCacher::process_stack_slot(int          index,

                                      SharkValue** addr,

                                      int          offset) {

   SharkValue *value = *addr;

   // Read the value from the frame if necessary

   if (stack_slot_needs_read(index, value)) {

     *addr = SharkValue::create_generic(

       value->type(),

       read_value_from_frame(

         SharkType::to_stackType(value->basic_type()),

         adjusted_offset(value, offset)),

       value->zero_checked());

   }

 }

 void SharkOSREntryCacher::process_monitor(int index,

                                           int box_offset,

                                           int obj_offset) {

   // Copy the monitor from the OSR buffer to the frame

   int src_offset = max_locals() + index * 2;

   builder()->CreateStore(

     builder()->CreateLoad(

       CreateAddressOfOSRBufEntry(src_offset, SharkType::intptr_type())),

     stack()->slot_addr(box_offset, SharkType::intptr_type()));

   builder()->CreateStore(

     builder()->CreateLoad(

       CreateAddressOfOSRBufEntry(src_offset + 1, SharkType::oop_type())),

     stack()->slot_addr(obj_offset, SharkType::oop_type()));

 }

 void SharkCacher::process_oop_tmp_slot(Value** value, int offset) {

   // Cache the temporary oop

   if (*value)

     *value = read_value_from_frame(SharkType::oop_type(), offset);

 }

 void SharkCacher::process_method_slot(Value** value, int offset) {

   // Cache the method pointer

   *value = read_value_from_frame(SharkType::Method_type(), offset);

 }

 void SharkFunctionEntryCacher::process_method_slot(Value** value, int offset) {

   // "Cache" the method pointer

   *value = method();

 }

 void SharkCacher::process_local_slot(int          index,

                                      SharkValue** addr,

                                      int          offset) {

   SharkValue *value = *addr;

   // Read the value from the frame if necessary

   if (local_slot_needs_read(index, value)) {

     *addr = SharkValue::create_generic(

       value->type(),

       read_value_from_frame(

         SharkType::to_stackType(value->basic_type()),

         adjusted_offset(value, offset)),

       value->zero_checked());

   }

 }

 Value* SharkOSREntryCacher::CreateAddressOfOSRBufEntry(int         offset,

                                                        Type* type) {

   Value *result = builder()->CreateStructGEP(osr_buf(), offset);

   if (type != SharkType::intptr_type())

     result = builder()->CreateBitCast(result, PointerType::getUnqual(type));

   return result;

 }

 void SharkOSREntryCacher::process_local_slot(int          index,

                                              SharkValue** addr,

                                              int          offset) {

   SharkValue *value = *addr;

   // Read the value from the OSR buffer if necessary

   if (local_slot_needs_read(index, value)) {

     *addr = SharkValue::create_generic(

       value->type(),

       builder()->CreateLoad(

         CreateAddressOfOSRBufEntry(

           adjusted_offset(value, max_locals() - 1 - index),

           SharkType::to_stackType(value->basic_type()))),

       value->zero_checked());

   }

 }

 void SharkDecacher::write_value_to_frame(Type* type,

                                          Value*      value,

                                          int         offset) {

   builder()->CreateStore(value, stack()->slot_addr(offset, type));

 }

 Value* SharkCacher::read_value_from_frame(Type* type, int offset) {

   return builder()->CreateLoad(stack()->slot_addr(offset, type));

 }