268 lines
8.4 KiB
C++
268 lines
8.4 KiB
C++
/*
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* Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved.
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* Copyright 2008, 2009, 2010 Red Hat, Inc.
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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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#include "precompiled.hpp"
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#include "shark/llvmHeaders.hpp"
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#include "shark/sharkFunction.hpp"
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#include "shark/sharkNativeWrapper.hpp"
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#include "shark/sharkStack.hpp"
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#include "shark/sharkType.hpp"
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using namespace llvm;
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void SharkStack::initialize(Value* method) {
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bool setup_sp_and_method = (method != NULL);
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int locals_words = max_locals();
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int extra_locals = locals_words - arg_size();
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int header_words = SharkFrame::header_words;
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int monitor_words = max_monitors()*frame::interpreter_frame_monitor_size();
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int stack_words = max_stack();
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int frame_words = header_words + monitor_words + stack_words;
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_extended_frame_size = frame_words + locals_words;
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// Update the stack pointer
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Value *stack_pointer = builder()->CreateSub(
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CreateLoadStackPointer(),
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LLVMValue::intptr_constant((frame_words + extra_locals) * wordSize));
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CreateStackOverflowCheck(stack_pointer);
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if (setup_sp_and_method)
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CreateStoreStackPointer(stack_pointer);
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// Create the frame
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_frame = builder()->CreateIntToPtr(
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stack_pointer,
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PointerType::getUnqual(
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ArrayType::get(SharkType::intptr_type(), extended_frame_size())),
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"frame");
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int offset = 0;
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// Expression stack
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_stack_slots_offset = offset;
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offset += stack_words;
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// Monitors
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_monitors_slots_offset = offset;
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offset += monitor_words;
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// Temporary oop slot
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_oop_tmp_slot_offset = offset++;
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// Method pointer
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_method_slot_offset = offset++;
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if (setup_sp_and_method) {
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builder()->CreateStore(
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method, slot_addr(method_slot_offset(), SharkType::Method_type()));
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}
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// Unextended SP
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builder()->CreateStore(stack_pointer, slot_addr(offset++));
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// PC
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_pc_slot_offset = offset++;
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// Frame header
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builder()->CreateStore(
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LLVMValue::intptr_constant(ZeroFrame::SHARK_FRAME), slot_addr(offset++));
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Value *fp = slot_addr(offset++);
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// Local variables
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_locals_slots_offset = offset;
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offset += locals_words;
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// Push the frame
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assert(offset == extended_frame_size(), "should do");
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builder()->CreateStore(CreateLoadFramePointer(), fp);
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CreateStoreFramePointer(
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builder()->CreatePtrToInt(fp, SharkType::intptr_type()));
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}
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// This function should match ZeroStack::overflow_check
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void SharkStack::CreateStackOverflowCheck(Value* sp) {
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BasicBlock *zero_ok = CreateBlock("zero_stack_ok");
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BasicBlock *overflow = CreateBlock("stack_overflow");
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BasicBlock *abi_ok = CreateBlock("abi_stack_ok");
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// Check the Zero stack
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builder()->CreateCondBr(
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builder()->CreateICmpULT(sp, stack_base()),
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overflow, zero_ok);
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// Check the ABI stack
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builder()->SetInsertPoint(zero_ok);
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Value *stack_top = builder()->CreateSub(
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builder()->CreateValueOfStructEntry(
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thread(),
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Thread::stack_base_offset(),
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SharkType::intptr_type(),
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"abi_base"),
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builder()->CreateValueOfStructEntry(
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thread(),
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Thread::stack_size_offset(),
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SharkType::intptr_type(),
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"abi_size"));
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Value *free_stack = builder()->CreateSub(
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builder()->CreatePtrToInt(
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builder()->CreateGetFrameAddress(),
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SharkType::intptr_type(),
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"abi_sp"),
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stack_top);
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builder()->CreateCondBr(
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builder()->CreateICmpULT(
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free_stack,
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LLVMValue::intptr_constant(JavaThread::stack_shadow_zone_size())),
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overflow, abi_ok);
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// Handle overflows
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builder()->SetInsertPoint(overflow);
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builder()->CreateCall(builder()->throw_StackOverflowError(), thread());
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builder()->CreateRet(LLVMValue::jint_constant(0));
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builder()->SetInsertPoint(abi_ok);
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}
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Value* SharkStack::CreatePopFrame(int result_slots) {
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assert(result_slots >= 0 && result_slots <= 2, "should be");
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int locals_to_pop = max_locals() - result_slots;
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Value *fp = CreateLoadFramePointer();
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Value *sp = builder()->CreateAdd(
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fp,
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LLVMValue::intptr_constant((1 + locals_to_pop) * wordSize));
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CreateStoreStackPointer(sp);
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CreateStoreFramePointer(
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builder()->CreateLoad(
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builder()->CreateIntToPtr(
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fp, PointerType::getUnqual(SharkType::intptr_type()))));
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return sp;
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}
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Value* SharkStack::slot_addr(int offset,
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Type* type,
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const char* name) const {
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bool needs_cast = type && type != SharkType::intptr_type();
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Value* result = builder()->CreateStructGEP(
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_frame, offset, needs_cast ? "" : name);
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if (needs_cast) {
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result = builder()->CreateBitCast(
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result, PointerType::getUnqual(type), name);
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}
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return result;
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}
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// The bits that differentiate stacks with normal and native frames on top
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SharkStack* SharkStack::CreateBuildAndPushFrame(SharkFunction* function,
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Value* method) {
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return new SharkStackWithNormalFrame(function, method);
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}
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SharkStack* SharkStack::CreateBuildAndPushFrame(SharkNativeWrapper* wrapper,
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Value* method) {
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return new SharkStackWithNativeFrame(wrapper, method);
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}
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SharkStackWithNormalFrame::SharkStackWithNormalFrame(SharkFunction* function,
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Value* method)
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: SharkStack(function), _function(function) {
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// For normal frames, the stack pointer and the method slot will
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// be set during each decache, so it is not necessary to do them
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// at the time the frame is created. However, we set them for
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// non-PRODUCT builds to make crash dumps easier to understand.
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initialize(PRODUCT_ONLY(NULL) NOT_PRODUCT(method));
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}
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SharkStackWithNativeFrame::SharkStackWithNativeFrame(SharkNativeWrapper* wrp,
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Value* method)
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: SharkStack(wrp), _wrapper(wrp) {
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initialize(method);
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}
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int SharkStackWithNormalFrame::arg_size() const {
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return function()->arg_size();
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}
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int SharkStackWithNativeFrame::arg_size() const {
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return wrapper()->arg_size();
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}
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int SharkStackWithNormalFrame::max_locals() const {
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return function()->max_locals();
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}
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int SharkStackWithNativeFrame::max_locals() const {
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return wrapper()->arg_size();
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}
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int SharkStackWithNormalFrame::max_stack() const {
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return function()->max_stack();
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}
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int SharkStackWithNativeFrame::max_stack() const {
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return 0;
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}
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int SharkStackWithNormalFrame::max_monitors() const {
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return function()->max_monitors();
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}
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int SharkStackWithNativeFrame::max_monitors() const {
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return wrapper()->is_synchronized() ? 1 : 0;
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}
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BasicBlock* SharkStackWithNormalFrame::CreateBlock(const char* name) const {
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return function()->CreateBlock(name);
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}
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BasicBlock* SharkStackWithNativeFrame::CreateBlock(const char* name) const {
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return wrapper()->CreateBlock(name);
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}
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address SharkStackWithNormalFrame::interpreter_entry_point() const {
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return (address) CppInterpreter::normal_entry;
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}
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address SharkStackWithNativeFrame::interpreter_entry_point() const {
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return (address) CppInterpreter::native_entry;
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}
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#ifndef PRODUCT
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void SharkStack::CreateAssertLastJavaSPIsNull() const {
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#ifdef ASSERT
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BasicBlock *fail = CreateBlock("assert_failed");
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BasicBlock *pass = CreateBlock("assert_ok");
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builder()->CreateCondBr(
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builder()->CreateICmpEQ(
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builder()->CreateLoad(last_Java_sp_addr()),
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LLVMValue::intptr_constant(0)),
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pass, fail);
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builder()->SetInsertPoint(fail);
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builder()->CreateShouldNotReachHere(__FILE__, __LINE__);
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builder()->CreateUnreachable();
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builder()->SetInsertPoint(pass);
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#endif // ASSERT
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}
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#endif // !PRODUCT
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