author | twisti |
Mon, 04 Jan 2010 18:38:08 +0100 | |
changeset 4564 | 55dfb20908d0 |
parent 3908 | 24b55ad4c228 |
child 4584 | e2a449e8cc6f |
permissions | -rw-r--r-- |
1 | 1 |
/* |
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* Copyright 1998-2009 Sun Microsystems, Inc. All Rights Reserved. |
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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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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* CA 95054 USA or visit www.sun.com if you need additional information or |
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* have any questions. |
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* |
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*/ |
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// CodeBlob - superclass for all entries in the CodeCache. |
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// |
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// Suptypes are: |
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// nmethod : Compiled Java methods (include method that calls to native code) |
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// RuntimeStub : Call to VM runtime methods |
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// DeoptimizationBlob : Used for deoptimizatation |
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// ExceptionBlob : Used for stack unrolling |
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// SafepointBlob : Used to handle illegal instruction exceptions |
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// |
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// |
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// Layout: |
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// - header |
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// - relocation |
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// - instruction space |
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// - data space |
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class DeoptimizationBlob; |
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class CodeBlob VALUE_OBJ_CLASS_SPEC { |
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friend class VMStructs; |
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private: |
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const char* _name; |
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int _size; // total size of CodeBlob in bytes |
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int _header_size; // size of header (depends on subclass) |
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int _relocation_size; // size of relocation |
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int _instructions_offset; // offset to where instructions region begins |
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int _frame_complete_offset; // instruction offsets in [0.._frame_complete_offset) have |
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// not finished setting up their frame. Beware of pc's in |
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// that range. There is a similar range(s) on returns |
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// which we don't detect. |
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int _data_offset; // offset to where data region begins |
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int _oops_offset; // offset to where embedded oop table begins (inside data) |
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int _oops_length; // number of embedded oops |
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int _frame_size; // size of stack frame |
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OopMapSet* _oop_maps; // OopMap for this CodeBlob |
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CodeComments _comments; |
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||
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friend class OopRecorder; |
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void fix_oop_relocations(address begin, address end, bool initialize_immediates); |
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inline void initialize_immediate_oop(oop* dest, jobject handle); |
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public: |
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// Returns the space needed for CodeBlob |
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static unsigned int allocation_size(CodeBuffer* cb, int header_size); |
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// Creation |
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// a) simple CodeBlob |
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// frame_complete is the offset from the beginning of the instructions |
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// to where the frame setup (from stackwalk viewpoint) is complete. |
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CodeBlob(const char* name, int header_size, int size, int frame_complete, int locs_size); |
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// b) full CodeBlob |
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CodeBlob( |
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const char* name, |
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CodeBuffer* cb, |
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int header_size, |
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int size, |
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int frame_complete, |
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int frame_size, |
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OopMapSet* oop_maps |
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); |
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// Deletion |
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void flush(); |
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// Typing |
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virtual bool is_buffer_blob() const { return false; } |
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virtual bool is_nmethod() const { return false; } |
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virtual bool is_runtime_stub() const { return false; } |
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virtual bool is_deoptimization_stub() const { return false; } |
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virtual bool is_uncommon_trap_stub() const { return false; } |
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virtual bool is_exception_stub() const { return false; } |
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virtual bool is_safepoint_stub() const { return false; } |
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virtual bool is_adapter_blob() const { return false; } |
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virtual bool is_compiled_by_c2() const { return false; } |
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virtual bool is_compiled_by_c1() const { return false; } |
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// Casting |
55dfb20908d0
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parents:
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nmethod* as_nmethod_or_null() { return is_nmethod() ? (nmethod*) this : NULL; } |
55dfb20908d0
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// Boundaries |
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address header_begin() const { return (address) this; } |
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address header_end() const { return ((address) this) + _header_size; }; |
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relocInfo* relocation_begin() const { return (relocInfo*) header_end(); }; |
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relocInfo* relocation_end() const { return (relocInfo*)(header_end() + _relocation_size); } |
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address instructions_begin() const { return (address) header_begin() + _instructions_offset; } |
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address instructions_end() const { return (address) header_begin() + _data_offset; } |
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address data_begin() const { return (address) header_begin() + _data_offset; } |
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address data_end() const { return (address) header_begin() + _size; } |
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oop* oops_begin() const { return (oop*) (header_begin() + _oops_offset); } |
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oop* oops_end() const { return oops_begin() + _oops_length; } |
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// Offsets |
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int relocation_offset() const { return _header_size; } |
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int instructions_offset() const { return _instructions_offset; } |
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int data_offset() const { return _data_offset; } |
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int oops_offset() const { return _oops_offset; } |
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// Sizes |
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int size() const { return _size; } |
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int header_size() const { return _header_size; } |
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int relocation_size() const { return (address) relocation_end() - (address) relocation_begin(); } |
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int instructions_size() const { return instructions_end() - instructions_begin(); } |
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int data_size() const { return data_end() - data_begin(); } |
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int oops_size() const { return (address) oops_end() - (address) oops_begin(); } |
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// Containment |
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bool blob_contains(address addr) const { return header_begin() <= addr && addr < data_end(); } |
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bool relocation_contains(relocInfo* addr) const{ return relocation_begin() <= addr && addr < relocation_end(); } |
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bool instructions_contains(address addr) const { return instructions_begin() <= addr && addr < instructions_end(); } |
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bool data_contains(address addr) const { return data_begin() <= addr && addr < data_end(); } |
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bool oops_contains(oop* addr) const { return oops_begin() <= addr && addr < oops_end(); } |
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bool contains(address addr) const { return instructions_contains(addr); } |
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bool is_frame_complete_at(address addr) const { return instructions_contains(addr) && |
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addr >= instructions_begin() + _frame_complete_offset; } |
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// Relocation support |
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void fix_oop_relocations(address begin, address end) { |
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fix_oop_relocations(begin, end, false); |
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} |
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void fix_oop_relocations() { |
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fix_oop_relocations(NULL, NULL, false); |
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} |
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relocInfo::relocType reloc_type_for_address(address pc); |
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bool is_at_poll_return(address pc); |
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bool is_at_poll_or_poll_return(address pc); |
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// Support for oops in scopes and relocs: |
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// Note: index 0 is reserved for null. |
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oop oop_at(int index) const { return index == 0? (oop)NULL: *oop_addr_at(index); } |
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oop* oop_addr_at(int index) const{ // for GC |
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// relocation indexes are biased by 1 (because 0 is reserved) |
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assert(index > 0 && index <= _oops_length, "must be a valid non-zero index"); |
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return &oops_begin()[index-1]; |
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} |
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void copy_oops(GrowableArray<jobject>* oops); |
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// CodeCache support: really only used by the nmethods, but in order to get |
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// asserts and certain bookkeeping to work in the CodeCache they are defined |
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// virtual here. |
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virtual bool is_zombie() const { return false; } |
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virtual bool is_locked_by_vm() const { return false; } |
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virtual bool is_unloaded() const { return false; } |
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virtual bool is_not_entrant() const { return false; } |
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// GC support |
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virtual bool is_alive() const = 0; |
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virtual void do_unloading(BoolObjectClosure* is_alive, |
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OopClosure* keep_alive, |
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bool unloading_occurred); |
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virtual void oops_do(OopClosure* f) = 0; |
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// (All CodeBlob subtypes other than NMethod currently have |
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// an empty oops_do() method. |
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// OopMap for frame |
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OopMapSet* oop_maps() const { return _oop_maps; } |
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void set_oop_maps(OopMapSet* p); |
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OopMap* oop_map_for_return_address(address return_address); |
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virtual void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { ShouldNotReachHere(); } |
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// Frame support |
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int frame_size() const { return _frame_size; } |
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void set_frame_size(int size) { _frame_size = size; } |
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// Returns true, if the next frame is responsible for GC'ing oops passed as arguments |
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virtual bool caller_must_gc_arguments(JavaThread* thread) const { return false; } |
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// Naming |
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const char* name() const { return _name; } |
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void set_name(const char* name) { _name = name; } |
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// Debugging |
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virtual void verify(); |
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virtual void print() const PRODUCT_RETURN; |
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virtual void print_value_on(outputStream* st) const PRODUCT_RETURN; |
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// Print the comment associated with offset on stream, if there is one |
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void print_block_comment(outputStream* stream, intptr_t offset) { |
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_comments.print_block_comment(stream, offset); |
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} |
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// Transfer ownership of comments to this CodeBlob |
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void set_comments(CodeComments& comments) { |
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_comments.assign(comments); |
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} |
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}; |
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//---------------------------------------------------------------------------------------------------- |
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// BufferBlob: used to hold non-relocatable machine code such as the interpreter, stubroutines, etc. |
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class BufferBlob: public CodeBlob { |
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friend class VMStructs; |
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private: |
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// Creation support |
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BufferBlob(const char* name, int size); |
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BufferBlob(const char* name, int size, CodeBuffer* cb); |
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void* operator new(size_t s, unsigned size); |
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public: |
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// Creation |
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static BufferBlob* create(const char* name, int buffer_size); |
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static BufferBlob* create(const char* name, CodeBuffer* cb); |
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static void free(BufferBlob* buf); |
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// Typing |
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bool is_buffer_blob() const { return true; } |
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bool is_adapter_blob() const; |
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// GC/Verification support |
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void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { /* nothing to do */ } |
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bool is_alive() const { return true; } |
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void do_unloading(BoolObjectClosure* is_alive, |
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OopClosure* keep_alive, |
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bool unloading_occurred) { /* do nothing */ } |
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void oops_do(OopClosure* f) { /* do nothing*/ } |
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void verify(); |
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void print() const PRODUCT_RETURN; |
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void print_value_on(outputStream* st) const PRODUCT_RETURN; |
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}; |
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255 |
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//---------------------------------------------------------------------------------------------------- |
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// RuntimeStub: describes stubs used by compiled code to call a (static) C++ runtime routine |
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class RuntimeStub: public CodeBlob { |
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friend class VMStructs; |
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private: |
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bool _caller_must_gc_arguments; |
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// Creation support |
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RuntimeStub( |
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const char* name, |
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267 |
CodeBuffer* cb, |
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int size, |
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269 |
int frame_complete, |
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270 |
int frame_size, |
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271 |
OopMapSet* oop_maps, |
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bool caller_must_gc_arguments |
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); |
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274 |
||
275 |
void* operator new(size_t s, unsigned size); |
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276 |
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public: |
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278 |
// Creation |
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279 |
static RuntimeStub* new_runtime_stub( |
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280 |
const char* stub_name, |
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281 |
CodeBuffer* cb, |
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282 |
int frame_complete, |
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283 |
int frame_size, |
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284 |
OopMapSet* oop_maps, |
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285 |
bool caller_must_gc_arguments |
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286 |
); |
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287 |
||
288 |
// Typing |
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289 |
bool is_runtime_stub() const { return true; } |
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290 |
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// GC support |
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292 |
bool caller_must_gc_arguments(JavaThread* thread) const { return _caller_must_gc_arguments; } |
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293 |
||
294 |
address entry_point() { return instructions_begin(); } |
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295 |
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296 |
// GC/Verification support |
|
297 |
void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* nothing to do */ } |
|
298 |
bool is_alive() const { return true; } |
|
299 |
void do_unloading(BoolObjectClosure* is_alive, |
|
300 |
OopClosure* keep_alive, |
|
301 |
bool unloading_occurred) { /* do nothing */ } |
|
302 |
void oops_do(OopClosure* f) { /* do-nothing*/ } |
|
303 |
||
304 |
void verify(); |
|
305 |
void print() const PRODUCT_RETURN; |
|
306 |
void print_value_on(outputStream* st) const PRODUCT_RETURN; |
|
307 |
}; |
|
308 |
||
309 |
||
310 |
//---------------------------------------------------------------------------------------------------- |
|
311 |
// Super-class for all blobs that exist in only one instance. Implements default behaviour. |
|
312 |
||
313 |
class SingletonBlob: public CodeBlob { |
|
314 |
friend class VMStructs; |
|
315 |
public: |
|
316 |
SingletonBlob( |
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317 |
const char* name, |
|
318 |
CodeBuffer* cb, |
|
319 |
int header_size, |
|
320 |
int size, |
|
321 |
int frame_size, |
|
322 |
OopMapSet* oop_maps |
|
323 |
) |
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324 |
: CodeBlob(name, cb, header_size, size, CodeOffsets::frame_never_safe, frame_size, oop_maps) |
|
325 |
{}; |
|
326 |
||
327 |
bool is_alive() const { return true; } |
|
328 |
void do_unloading(BoolObjectClosure* is_alive, |
|
329 |
OopClosure* keep_alive, |
|
330 |
bool unloading_occurred) { /* do-nothing*/ } |
|
331 |
||
332 |
void verify(); // does nothing |
|
333 |
void print() const PRODUCT_RETURN; |
|
334 |
void print_value_on(outputStream* st) const PRODUCT_RETURN; |
|
335 |
}; |
|
336 |
||
337 |
||
338 |
//---------------------------------------------------------------------------------------------------- |
|
339 |
// DeoptimizationBlob |
|
340 |
||
341 |
class DeoptimizationBlob: public SingletonBlob { |
|
342 |
friend class VMStructs; |
|
343 |
private: |
|
344 |
int _unpack_offset; |
|
345 |
int _unpack_with_exception; |
|
346 |
int _unpack_with_reexecution; |
|
347 |
||
348 |
int _unpack_with_exception_in_tls; |
|
349 |
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350 |
// Creation support |
|
351 |
DeoptimizationBlob( |
|
352 |
CodeBuffer* cb, |
|
353 |
int size, |
|
354 |
OopMapSet* oop_maps, |
|
355 |
int unpack_offset, |
|
356 |
int unpack_with_exception_offset, |
|
357 |
int unpack_with_reexecution_offset, |
|
358 |
int frame_size |
|
359 |
); |
|
360 |
||
361 |
void* operator new(size_t s, unsigned size); |
|
362 |
||
363 |
public: |
|
364 |
// Creation |
|
365 |
static DeoptimizationBlob* create( |
|
366 |
CodeBuffer* cb, |
|
367 |
OopMapSet* oop_maps, |
|
368 |
int unpack_offset, |
|
369 |
int unpack_with_exception_offset, |
|
370 |
int unpack_with_reexecution_offset, |
|
371 |
int frame_size |
|
372 |
); |
|
373 |
||
374 |
// Typing |
|
375 |
bool is_deoptimization_stub() const { return true; } |
|
376 |
const DeoptimizationBlob *as_deoptimization_stub() const { return this; } |
|
377 |
bool exception_address_is_unpack_entry(address pc) const { |
|
378 |
address unpack_pc = unpack(); |
|
379 |
return (pc == unpack_pc || (pc + frame::pc_return_offset) == unpack_pc); |
|
380 |
} |
|
381 |
||
382 |
||
383 |
||
384 |
||
385 |
// GC for args |
|
386 |
void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* Nothing to do */ } |
|
387 |
||
388 |
// Iteration |
|
389 |
void oops_do(OopClosure* f) {} |
|
390 |
||
391 |
// Printing |
|
392 |
void print_value_on(outputStream* st) const PRODUCT_RETURN; |
|
393 |
||
394 |
address unpack() const { return instructions_begin() + _unpack_offset; } |
|
395 |
address unpack_with_exception() const { return instructions_begin() + _unpack_with_exception; } |
|
396 |
address unpack_with_reexecution() const { return instructions_begin() + _unpack_with_reexecution; } |
|
397 |
||
398 |
// Alternate entry point for C1 where the exception and issuing pc |
|
399 |
// are in JavaThread::_exception_oop and JavaThread::_exception_pc |
|
400 |
// instead of being in registers. This is needed because C1 doesn't |
|
401 |
// model exception paths in a way that keeps these registers free so |
|
402 |
// there may be live values in those registers during deopt. |
|
403 |
void set_unpack_with_exception_in_tls_offset(int offset) { |
|
404 |
_unpack_with_exception_in_tls = offset; |
|
405 |
assert(contains(instructions_begin() + _unpack_with_exception_in_tls), "must be PC inside codeblob"); |
|
406 |
} |
|
407 |
address unpack_with_exception_in_tls() const { return instructions_begin() + _unpack_with_exception_in_tls; } |
|
408 |
}; |
|
409 |
||
410 |
||
411 |
//---------------------------------------------------------------------------------------------------- |
|
412 |
// UncommonTrapBlob (currently only used by Compiler 2) |
|
413 |
||
414 |
#ifdef COMPILER2 |
|
415 |
||
416 |
class UncommonTrapBlob: public SingletonBlob { |
|
417 |
friend class VMStructs; |
|
418 |
private: |
|
419 |
// Creation support |
|
420 |
UncommonTrapBlob( |
|
421 |
CodeBuffer* cb, |
|
422 |
int size, |
|
423 |
OopMapSet* oop_maps, |
|
424 |
int frame_size |
|
425 |
); |
|
426 |
||
427 |
void* operator new(size_t s, unsigned size); |
|
428 |
||
429 |
public: |
|
430 |
// Creation |
|
431 |
static UncommonTrapBlob* create( |
|
432 |
CodeBuffer* cb, |
|
433 |
OopMapSet* oop_maps, |
|
434 |
int frame_size |
|
435 |
); |
|
436 |
||
437 |
// GC for args |
|
438 |
void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* nothing to do */ } |
|
439 |
||
440 |
// Typing |
|
441 |
bool is_uncommon_trap_stub() const { return true; } |
|
442 |
||
443 |
// Iteration |
|
444 |
void oops_do(OopClosure* f) {} |
|
445 |
}; |
|
446 |
||
447 |
||
448 |
//---------------------------------------------------------------------------------------------------- |
|
449 |
// ExceptionBlob: used for exception unwinding in compiled code (currently only used by Compiler 2) |
|
450 |
||
451 |
class ExceptionBlob: public SingletonBlob { |
|
452 |
friend class VMStructs; |
|
453 |
private: |
|
454 |
// Creation support |
|
455 |
ExceptionBlob( |
|
456 |
CodeBuffer* cb, |
|
457 |
int size, |
|
458 |
OopMapSet* oop_maps, |
|
459 |
int frame_size |
|
460 |
); |
|
461 |
||
462 |
void* operator new(size_t s, unsigned size); |
|
463 |
||
464 |
public: |
|
465 |
// Creation |
|
466 |
static ExceptionBlob* create( |
|
467 |
CodeBuffer* cb, |
|
468 |
OopMapSet* oop_maps, |
|
469 |
int frame_size |
|
470 |
); |
|
471 |
||
472 |
// GC for args |
|
473 |
void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { /* nothing to do */ } |
|
474 |
||
475 |
// Typing |
|
476 |
bool is_exception_stub() const { return true; } |
|
477 |
||
478 |
// Iteration |
|
479 |
void oops_do(OopClosure* f) {} |
|
480 |
}; |
|
481 |
#endif // COMPILER2 |
|
482 |
||
483 |
||
484 |
//---------------------------------------------------------------------------------------------------- |
|
485 |
// SafepointBlob: handles illegal_instruction exceptions during a safepoint |
|
486 |
||
487 |
class SafepointBlob: public SingletonBlob { |
|
488 |
friend class VMStructs; |
|
489 |
private: |
|
490 |
// Creation support |
|
491 |
SafepointBlob( |
|
492 |
CodeBuffer* cb, |
|
493 |
int size, |
|
494 |
OopMapSet* oop_maps, |
|
495 |
int frame_size |
|
496 |
); |
|
497 |
||
498 |
void* operator new(size_t s, unsigned size); |
|
499 |
||
500 |
public: |
|
501 |
// Creation |
|
502 |
static SafepointBlob* create( |
|
503 |
CodeBuffer* cb, |
|
504 |
OopMapSet* oop_maps, |
|
505 |
int frame_size |
|
506 |
); |
|
507 |
||
508 |
// GC for args |
|
509 |
void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { /* nothing to do */ } |
|
510 |
||
511 |
// Typing |
|
512 |
bool is_safepoint_stub() const { return true; } |
|
513 |
||
514 |
// Iteration |
|
515 |
void oops_do(OopClosure* f) {} |
|
516 |
}; |