jdk8-mips64-public/hotspot: src/share/vm/shark/sharkStack.cpp@01522ca68fc7 (annotated)

src/share/vm/shark/sharkStack.cpp@01522ca68fc7 (annotated)

src/share/vm/shark/sharkStack.cpp

Tue, 18 Jun 2013 12:31:07 -0700

author: johnc
date: Tue, 18 Jun 2013 12:31:07 -0700
changeset 5277: 01522ca68fc7
parent 4314: 2cd5e15048e6
child 6876: 710a3c8b516e
permissions: -rw-r--r--

8015237: Parallelize string table scanning during strong root processing
Summary: Parallelize the scanning of the intern string table by having each GC worker claim a given number of buckets. Changes were also reviewed by Per Liden <per.liden@oracle.com>.
Reviewed-by: tschatzl, stefank, twisti

 /*
  * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved.
  * Copyright 2008, 2009, 2010 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 "shark/llvmHeaders.hpp"
 #include "shark/sharkFunction.hpp"
 #include "shark/sharkNativeWrapper.hpp"
 #include "shark/sharkStack.hpp"
 #include "shark/sharkType.hpp"
 using namespace llvm;
 void SharkStack::initialize(Value* method) {
   bool setup_sp_and_method = (method != NULL);
   int locals_words  = max_locals();
   int extra_locals  = locals_words - arg_size();
   int header_words  = SharkFrame::header_words;
   int monitor_words = max_monitors()*frame::interpreter_frame_monitor_size();
   int stack_words   = max_stack();
   int frame_words   = header_words + monitor_words + stack_words;
   _extended_frame_size = frame_words + locals_words;
   // Update the stack pointer
   Value *stack_pointer = builder()->CreateSub(
     CreateLoadStackPointer(),
     LLVMValue::intptr_constant((frame_words + extra_locals) * wordSize));
   CreateStackOverflowCheck(stack_pointer);
   if (setup_sp_and_method)
     CreateStoreStackPointer(stack_pointer);
   // Create the frame
   _frame = builder()->CreateIntToPtr(
     stack_pointer,
     PointerType::getUnqual(
       ArrayType::get(SharkType::intptr_type(), extended_frame_size())),
     "frame");
   int offset = 0;
   // Expression stack
   _stack_slots_offset = offset;
   offset += stack_words;
   // Monitors
   _monitors_slots_offset = offset;
   offset += monitor_words;
   // Temporary oop slot
   _oop_tmp_slot_offset = offset++;
   // Method pointer
   _method_slot_offset = offset++;
   if (setup_sp_and_method) {
     builder()->CreateStore(
       method, slot_addr(method_slot_offset(), SharkType::Method_type()));
   }
   // Unextended SP
   builder()->CreateStore(stack_pointer, slot_addr(offset++));
   // PC
   _pc_slot_offset = offset++;
   // Frame header
   builder()->CreateStore(
     LLVMValue::intptr_constant(ZeroFrame::SHARK_FRAME), slot_addr(offset++));
   Value *fp = slot_addr(offset++);
   // Local variables
   _locals_slots_offset = offset;
   offset += locals_words;
   // Push the frame
   assert(offset == extended_frame_size(), "should do");
   builder()->CreateStore(CreateLoadFramePointer(), fp);
   CreateStoreFramePointer(
     builder()->CreatePtrToInt(fp, SharkType::intptr_type()));
 }
 // This function should match ZeroStack::overflow_check
 void SharkStack::CreateStackOverflowCheck(Value* sp) {
   BasicBlock *zero_ok  = CreateBlock("zero_stack_ok");
   BasicBlock *overflow = CreateBlock("stack_overflow");
   BasicBlock *abi_ok   = CreateBlock("abi_stack_ok");
   // Check the Zero stack
   builder()->CreateCondBr(
     builder()->CreateICmpULT(sp, stack_base()),
     overflow, zero_ok);
   // Check the ABI stack
   builder()->SetInsertPoint(zero_ok);
   Value *stack_top = builder()->CreateSub(
     builder()->CreateValueOfStructEntry(
       thread(),
       Thread::stack_base_offset(),
       SharkType::intptr_type(),
       "abi_base"),
     builder()->CreateValueOfStructEntry(
       thread(),
       Thread::stack_size_offset(),
       SharkType::intptr_type(),
       "abi_size"));
   Value *free_stack = builder()->CreateSub(
     builder()->CreatePtrToInt(
       builder()->CreateGetFrameAddress(),
       SharkType::intptr_type(),
       "abi_sp"),
     stack_top);
   builder()->CreateCondBr(
     builder()->CreateICmpULT(
       free_stack,
       LLVMValue::intptr_constant(StackShadowPages * os::vm_page_size())),
     overflow, abi_ok);
   // Handle overflows
   builder()->SetInsertPoint(overflow);
   builder()->CreateCall(builder()->throw_StackOverflowError(), thread());
   builder()->CreateRet(LLVMValue::jint_constant(0));
   builder()->SetInsertPoint(abi_ok);
 }
 Value* SharkStack::CreatePopFrame(int result_slots) {
   assert(result_slots >= 0 && result_slots <= 2, "should be");
   int locals_to_pop = max_locals() - result_slots;
   Value *fp = CreateLoadFramePointer();
   Value *sp = builder()->CreateAdd(
     fp,
     LLVMValue::intptr_constant((1 + locals_to_pop) * wordSize));
   CreateStoreStackPointer(sp);
   CreateStoreFramePointer(
     builder()->CreateLoad(
       builder()->CreateIntToPtr(
         fp, PointerType::getUnqual(SharkType::intptr_type()))));
   return sp;
 }
 Value* SharkStack::slot_addr(int         offset,
                              Type* type,
                              const char* name) const {
   bool needs_cast = type && type != SharkType::intptr_type();
   Value* result = builder()->CreateStructGEP(
     _frame, offset, needs_cast ? "" : name);
   if (needs_cast) {
     result = builder()->CreateBitCast(
       result, PointerType::getUnqual(type), name);
   }
   return result;
 }
 // The bits that differentiate stacks with normal and native frames on top
 SharkStack* SharkStack::CreateBuildAndPushFrame(SharkFunction* function,
                                                 Value*         method) {
   return new SharkStackWithNormalFrame(function, method);
 }
 SharkStack* SharkStack::CreateBuildAndPushFrame(SharkNativeWrapper* wrapper,
                                                 Value*              method) {
   return new SharkStackWithNativeFrame(wrapper, method);
 }
 SharkStackWithNormalFrame::SharkStackWithNormalFrame(SharkFunction* function,
                                                      Value*         method)
   : SharkStack(function), _function(function) {
   // For normal frames, the stack pointer and the method slot will
   // be set during each decache, so it is not necessary to do them
   // at the time the frame is created.  However, we set them for
   // non-PRODUCT builds to make crash dumps easier to understand.
   initialize(PRODUCT_ONLY(NULL) NOT_PRODUCT(method));
 }
 SharkStackWithNativeFrame::SharkStackWithNativeFrame(SharkNativeWrapper* wrp,
                                                      Value*              method)
   : SharkStack(wrp), _wrapper(wrp) {
   initialize(method);
 }
 int SharkStackWithNormalFrame::arg_size() const {
   return function()->arg_size();
 }
 int SharkStackWithNativeFrame::arg_size() const {
   return wrapper()->arg_size();
 }
 int SharkStackWithNormalFrame::max_locals() const {
   return function()->max_locals();
 }
 int SharkStackWithNativeFrame::max_locals() const {
   return wrapper()->arg_size();
 }
 int SharkStackWithNormalFrame::max_stack() const {
   return function()->max_stack();
 }
 int SharkStackWithNativeFrame::max_stack() const {
   return 0;
 }
 int SharkStackWithNormalFrame::max_monitors() const {
   return function()->max_monitors();
 }
 int SharkStackWithNativeFrame::max_monitors() const {
   return wrapper()->is_synchronized() ? 1 : 0;
 }
 BasicBlock* SharkStackWithNormalFrame::CreateBlock(const char* name) const {
   return function()->CreateBlock(name);
 }
 BasicBlock* SharkStackWithNativeFrame::CreateBlock(const char* name) const {
   return wrapper()->CreateBlock(name);
 }
 address SharkStackWithNormalFrame::interpreter_entry_point() const {
   return (address) CppInterpreter::normal_entry;
 }
 address SharkStackWithNativeFrame::interpreter_entry_point() const {
   return (address) CppInterpreter::native_entry;
 }
 #ifndef PRODUCT
 void SharkStack::CreateAssertLastJavaSPIsNull() const {
 #ifdef ASSERT
   BasicBlock *fail = CreateBlock("assert_failed");
   BasicBlock *pass = CreateBlock("assert_ok");
   builder()->CreateCondBr(
     builder()->CreateICmpEQ(
       builder()->CreateLoad(last_Java_sp_addr()),
       LLVMValue::intptr_constant(0)),
     pass, fail);
   builder()->SetInsertPoint(fail);
   builder()->CreateShouldNotReachHere(__FILE__, __LINE__);
   builder()->CreateUnreachable();
   builder()->SetInsertPoint(pass);
 #endif // ASSERT
 }
 #endif // !PRODUCT

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/shark/sharkStack.cpp@01522ca68fc7 (annotated)

src/share/vm/shark/sharkStack.cpp