Mercurial > hg > graal-jvmci-8
view src/share/vm/runtime/registerMap.hpp @ 6934:4735d2c84362
7200776: Implement default methods in interfaces
Summary: Add generic type analysis and default method selection algorithms
Reviewed-by: coleenp, acorn
author | kamg |
---|---|
date | Thu, 11 Oct 2012 12:25:42 -0400 |
parents | 1d1603768966 |
children | 63a4eb8bcd23 |
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/* * Copyright (c) 2002, 2011, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #ifndef SHARE_VM_RUNTIME_REGISTERMAP_HPP #define SHARE_VM_RUNTIME_REGISTERMAP_HPP #include "code/vmreg.hpp" #include "utilities/globalDefinitions.hpp" #ifdef TARGET_ARCH_x86 # include "register_x86.hpp" #endif #ifdef TARGET_ARCH_sparc # include "register_sparc.hpp" #endif #ifdef TARGET_ARCH_zero # include "register_zero.hpp" #endif #ifdef TARGET_ARCH_arm # include "register_arm.hpp" #endif #ifdef TARGET_ARCH_ppc # include "register_ppc.hpp" #endif class JavaThread; // // RegisterMap // // A companion structure used for stack traversal. The RegisterMap contains // misc. information needed in order to do correct stack traversal of stack // frames. Hence, it must always be passed in as an argument to // frame::sender(RegisterMap*). // // In particular, // 1) It provides access to the thread for which the stack belongs. The // thread object is needed in order to get sender of a deoptimized frame. // // 2) It is used to pass information from a callee frame to its caller // frame about how the frame should be traversed. This is used to let // the caller frame take care of calling oops-do of out-going // arguments, when the callee frame is not instantiated yet. This // happens, e.g., when a compiled frame calls into // resolve_virtual_call. (Hence, it is critical that the same // RegisterMap object is used for the entire stack walk. Normally, // this is hidden by using the StackFrameStream.) This is used when // doing follow_oops and oops_do. // // 3) The RegisterMap keeps track of the values of callee-saved registers // from frame to frame (hence, the name). For some stack traversal the // values of the callee-saved registers does not matter, e.g., if you // only need the static properies such as frame type, pc, and such. // Updating of the RegisterMap can be turned off by instantiating the // register map as: RegisterMap map(thread, false); class RegisterMap : public StackObj { public: typedef julong LocationValidType; enum { reg_count = ConcreteRegisterImpl::number_of_registers, location_valid_type_size = sizeof(LocationValidType)*8, location_valid_size = (reg_count+location_valid_type_size-1)/location_valid_type_size }; private: intptr_t* _location[reg_count]; // Location of registers (intptr_t* looks better than address in the debugger) LocationValidType _location_valid[location_valid_size]; bool _include_argument_oops; // Should include argument_oop marked locations for compiler JavaThread* _thread; // Reference to current thread bool _update_map; // Tells if the register map need to be // updated when traversing the stack #ifdef ASSERT void check_location_valid(); #else void check_location_valid() {} #endif public: debug_only(intptr_t* _update_for_id;) // Assert that RegisterMap is not updated twice for same frame RegisterMap(JavaThread *thread, bool update_map = true); RegisterMap(const RegisterMap* map); address location(VMReg reg) const { int index = reg->value() / location_valid_type_size; assert(0 <= reg->value() && reg->value() < reg_count, "range check"); assert(0 <= index && index < location_valid_size, "range check"); if (_location_valid[index] & ((LocationValidType)1 << (reg->value() % location_valid_type_size))) { return (address) _location[reg->value()]; } else { return pd_location(reg); } } void set_location(VMReg reg, address loc) { int index = reg->value() / location_valid_type_size; assert(0 <= reg->value() && reg->value() < reg_count, "range check"); assert(0 <= index && index < location_valid_size, "range check"); assert(_update_map, "updating map that does not need updating"); _location[reg->value()] = (intptr_t*) loc; _location_valid[index] |= ((LocationValidType)1 << (reg->value() % location_valid_type_size)); check_location_valid(); } // Called by an entry frame. void clear(); bool include_argument_oops() const { return _include_argument_oops; } void set_include_argument_oops(bool f) { _include_argument_oops = f; } JavaThread *thread() const { return _thread; } bool update_map() const { return _update_map; } void print_on(outputStream* st) const; void print() const; // the following contains the definition of pd_xxx methods #ifdef TARGET_ARCH_x86 # include "registerMap_x86.hpp" #endif #ifdef TARGET_ARCH_sparc # include "registerMap_sparc.hpp" #endif #ifdef TARGET_ARCH_zero # include "registerMap_zero.hpp" #endif #ifdef TARGET_ARCH_arm # include "registerMap_arm.hpp" #endif #ifdef TARGET_ARCH_ppc # include "registerMap_ppc.hpp" #endif }; #endif // SHARE_VM_RUNTIME_REGISTERMAP_HPP