Mercurial > hg > graal-compiler
view src/share/vm/compiler/oopMap.hpp @ 6792:137868b7aa6f
7196199: java/text/Bidi/Bug6665028.java failed: Bidi run count incorrect
Summary: Save whole XMM/YMM registers in safepoint interrupt handler.
Reviewed-by: roland, twisti
author | kvn |
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date | Mon, 17 Sep 2012 19:39:07 -0700 |
parents | f95d63e2154a |
children | 06f017f7daa7 |
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/* * Copyright (c) 1998, 2010, 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_COMPILER_OOPMAP_HPP #define SHARE_VM_COMPILER_OOPMAP_HPP #include "code/compressedStream.hpp" #include "code/vmreg.hpp" #include "memory/allocation.hpp" #include "utilities/growableArray.hpp" // Interface for generating the frame map for compiled code. A frame map // describes for a specific pc whether each register and frame stack slot is: // Oop - A GC root for current frame // Value - Live non-oop, non-float value: int, either half of double // Dead - Dead; can be Zapped for debugging // CalleeXX - Callee saved; also describes which caller register is saved // DerivedXX - A derived oop; original oop is described. // // OopMapValue describes a single OopMap entry class frame; class RegisterMap; class DerivedPointerEntry; class OopMapValue: public StackObj { friend class VMStructs; private: short _value; int value() const { return _value; } void set_value(int value) { _value = value; } short _content_reg; public: // Constants enum { type_bits = 5, register_bits = BitsPerShort - type_bits }; enum { type_shift = 0, register_shift = type_bits }; enum { type_mask = right_n_bits(type_bits), type_mask_in_place = type_mask << type_shift, register_mask = right_n_bits(register_bits), register_mask_in_place = register_mask << register_shift }; enum oop_types { // must fit in type_bits unused_value =0, // powers of 2, for masking OopMapStream oop_value = 1, value_value = 2, narrowoop_value = 4, callee_saved_value = 8, derived_oop_value= 16 }; // Constructors OopMapValue () { set_value(0); set_content_reg(VMRegImpl::Bad()); } OopMapValue (VMReg reg, oop_types t) { set_reg_type(reg,t); } OopMapValue (VMReg reg, oop_types t, VMReg reg2) { set_reg_type(reg,t); set_content_reg(reg2); } OopMapValue (CompressedReadStream* stream) { read_from(stream); } // Archiving void write_on(CompressedWriteStream* stream) { stream->write_int(value()); if(is_callee_saved() || is_derived_oop()) { stream->write_int(content_reg()->value()); } } void read_from(CompressedReadStream* stream) { set_value(stream->read_int()); if(is_callee_saved() || is_derived_oop()) { set_content_reg(VMRegImpl::as_VMReg(stream->read_int(), true)); } } // Querying bool is_oop() { return mask_bits(value(), type_mask_in_place) == oop_value; } bool is_value() { return mask_bits(value(), type_mask_in_place) == value_value; } bool is_narrowoop() { return mask_bits(value(), type_mask_in_place) == narrowoop_value; } bool is_callee_saved() { return mask_bits(value(), type_mask_in_place) == callee_saved_value; } bool is_derived_oop() { return mask_bits(value(), type_mask_in_place) == derived_oop_value; } void set_oop() { set_value((value() & register_mask_in_place) | oop_value); } void set_value() { set_value((value() & register_mask_in_place) | value_value); } void set_narrowoop() { set_value((value() & register_mask_in_place) | narrowoop_value); } void set_callee_saved() { set_value((value() & register_mask_in_place) | callee_saved_value); } void set_derived_oop() { set_value((value() & register_mask_in_place) | derived_oop_value); } VMReg reg() const { return VMRegImpl::as_VMReg(mask_bits(value(), register_mask_in_place) >> register_shift); } oop_types type() const { return (oop_types)mask_bits(value(), type_mask_in_place); } static bool legal_vm_reg_name(VMReg p) { return (p->value() == (p->value() & register_mask)); } void set_reg_type(VMReg p, oop_types t) { set_value((p->value() << register_shift) | t); assert(reg() == p, "sanity check" ); assert(type() == t, "sanity check" ); } VMReg content_reg() const { return VMRegImpl::as_VMReg(_content_reg, true); } void set_content_reg(VMReg r) { _content_reg = r->value(); } // Physical location queries bool is_register_loc() { return reg()->is_reg(); } bool is_stack_loc() { return reg()->is_stack(); } // Returns offset from sp. int stack_offset() { assert(is_stack_loc(), "must be stack location"); return reg()->reg2stack(); } void print_on(outputStream* st) const; void print() const { print_on(tty); } }; class OopMap: public ResourceObj { friend class OopMapStream; friend class VMStructs; private: int _pc_offset; int _omv_count; int _omv_data_size; unsigned char* _omv_data; CompressedWriteStream* _write_stream; debug_only( OopMapValue::oop_types* _locs_used; int _locs_length;) // Accessors unsigned char* omv_data() const { return _omv_data; } void set_omv_data(unsigned char* value) { _omv_data = value; } int omv_data_size() const { return _omv_data_size; } void set_omv_data_size(int value) { _omv_data_size = value; } int omv_count() const { return _omv_count; } void set_omv_count(int value) { _omv_count = value; } void increment_count() { _omv_count++; } CompressedWriteStream* write_stream() const { return _write_stream; } void set_write_stream(CompressedWriteStream* value) { _write_stream = value; } private: enum DeepCopyToken { _deep_copy_token }; OopMap(DeepCopyToken, OopMap* source); // used only by deep_copy public: OopMap(int frame_size, int arg_count); // pc-offset handling int offset() const { return _pc_offset; } void set_offset(int o) { _pc_offset = o; } // Check to avoid double insertion debug_only(OopMapValue::oop_types locs_used( int indx ) { return _locs_used[indx]; }) // Construction // frame_size units are stack-slots (4 bytes) NOT intptr_t; we can name odd // slots to hold 4-byte values like ints and floats in the LP64 build. void set_oop ( VMReg local); void set_value( VMReg local); void set_narrowoop(VMReg local); void set_dead ( VMReg local); void set_callee_saved( VMReg local, VMReg caller_machine_register ); void set_derived_oop ( VMReg local, VMReg derived_from_local_register ); void set_xxx(VMReg reg, OopMapValue::oop_types x, VMReg optional); int heap_size() const; void copy_to(address addr); OopMap* deep_copy(); bool has_derived_pointer() const PRODUCT_RETURN0; bool legal_vm_reg_name(VMReg local) { return OopMapValue::legal_vm_reg_name(local); } // Printing void print_on(outputStream* st) const; void print() const { print_on(tty); } }; class OopMapSet : public ResourceObj { friend class VMStructs; private: int _om_count; int _om_size; OopMap** _om_data; int om_count() const { return _om_count; } void set_om_count(int value) { _om_count = value; } void increment_count() { _om_count++; } int om_size() const { return _om_size; } void set_om_size(int value) { _om_size = value; } OopMap** om_data() const { return _om_data; } void set_om_data(OopMap** value) { _om_data = value; } void grow_om_data(); void set(int index,OopMap* value) { assert((index == 0) || ((index > 0) && (index < om_size())),"bad index"); _om_data[index] = value; } public: OopMapSet(); // returns the number of OopMaps in this OopMapSet int size() const { return _om_count; } // returns the OopMap at a given index OopMap* at(int index) const { assert((index >= 0) && (index <= om_count()),"bad index"); return _om_data[index]; } // Collect OopMaps. void add_gc_map(int pc, OopMap* map); // Returns the only oop map. Used for reconstructing // Adapter frames during deoptimization OopMap* singular_oop_map(); // returns OopMap in that is anchored to the pc OopMap* find_map_at_offset(int pc_offset) const; int heap_size() const; void copy_to(address addr); // Methods oops_do() and all_do() filter out NULL oops and // oop == Universe::narrow_oop_base() before passing oops // to closures. // Iterates through frame for a compiled method static void oops_do (const frame* fr, const RegisterMap* reg_map, OopClosure* f); static void update_register_map(const frame* fr, RegisterMap *reg_map); // Iterates through frame for a compiled method for dead ones and values, too static void all_do(const frame* fr, const RegisterMap* reg_map, OopClosure* oop_fn, void derived_oop_fn(oop* base, oop* derived), OopClosure* value_fn); // Printing void print_on(outputStream* st) const; void print() const { print_on(tty); } }; class OopMapStream : public StackObj { private: CompressedReadStream* _stream; int _mask; int _size; int _position; bool _valid_omv; OopMapValue _omv; void find_next(); public: OopMapStream(OopMap* oop_map); OopMapStream(OopMap* oop_map, int oop_types_mask); bool is_done() { if(!_valid_omv) { find_next(); } return !_valid_omv; } void next() { find_next(); } OopMapValue current() { return _omv; } }; // Derived pointer support. This table keeps track of all derived points on a // stack. It is cleared before each scavenge/GC. During the traversal of all // oops, it is filled in with references to all locations that contains a // derived oop (assumed to be very few). When the GC is complete, the derived // pointers are updated based on their base pointers new value and an offset. #ifdef COMPILER2 class DerivedPointerTable : public AllStatic { friend class VMStructs; private: static GrowableArray<DerivedPointerEntry*>* _list; static bool _active; // do not record pointers for verify pass etc. public: static void clear(); // Called before scavenge/GC static void add(oop *derived, oop *base); // Called during scavenge/GC static void update_pointers(); // Called after scavenge/GC static bool is_empty() { return _list == NULL || _list->is_empty(); } static bool is_active() { return _active; } static void set_active(bool value) { _active = value; } }; // A utility class to temporarily "deactivate" the DerivedPointerTable. // (Note: clients are responsible for any MT-safety issues) class DerivedPointerTableDeactivate: public StackObj { private: bool _active; public: DerivedPointerTableDeactivate() { _active = DerivedPointerTable::is_active(); if (_active) { DerivedPointerTable::set_active(false); } } ~DerivedPointerTableDeactivate() { assert(!DerivedPointerTable::is_active(), "Inconsistency: not MT-safe"); if (_active) { DerivedPointerTable::set_active(true); } } }; #endif // COMPILER2 #endif // SHARE_VM_COMPILER_OOPMAP_HPP