518 lines
19 KiB
C++
518 lines
19 KiB
C++
/*
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* Copyright (c) 1998, 2013, Oracle and/or its affiliates. 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 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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#ifndef SHARE_VM_CODE_CODEBLOB_HPP
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#define SHARE_VM_CODE_CODEBLOB_HPP
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#include "asm/codeBuffer.hpp"
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#include "compiler/oopMap.hpp"
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#include "runtime/frame.hpp"
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#include "runtime/handles.hpp"
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// CodeBlob Types
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// Used in the CodeCache to assign CodeBlobs to different CodeHeaps
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struct CodeBlobType {
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enum {
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MethodNonProfiled = 0, // Execution level 1 and 4 (non-profiled) nmethods (including native nmethods)
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MethodProfiled = 1, // Execution level 2 and 3 (profiled) nmethods
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NonNMethod = 2, // Non-nmethods like Buffers, Adapters and Runtime Stubs
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All = 3, // All types (No code cache segmentation)
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NumTypes = 4 // Number of CodeBlobTypes
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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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// - content space
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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 _content_offset; // offset to where content region begins (this includes consts, insts, stubs)
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int _code_offset; // offset to where instructions region begins (this includes insts, stubs)
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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 _frame_size; // size of stack frame
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OopMapSet* _oop_maps; // OopMap for this CodeBlob
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CodeStrings _strings;
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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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static unsigned int align_code_offset(int offset);
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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_method_handles_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
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nmethod* as_nmethod_or_null() { return is_nmethod() ? (nmethod*) this : NULL; }
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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 content_begin() const { return (address) header_begin() + _content_offset; }
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address content_end() const { return (address) header_begin() + _data_offset; }
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address code_begin() const { return (address) header_begin() + _code_offset; }
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address code_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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// Offsets
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int relocation_offset() const { return _header_size; }
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int content_offset() const { return _content_offset; }
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int code_offset() const { return _code_offset; }
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int data_offset() const { return _data_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 content_size() const { return content_end() - content_begin(); }
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int code_size() const { return code_end() - code_begin(); }
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int data_size() const { return data_end() - data_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 content_contains(address addr) const { return content_begin() <= addr && addr < content_end(); }
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bool code_contains(address addr) const { return code_begin() <= addr && addr < code_end(); }
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bool data_contains(address addr) const { return data_begin() <= addr && addr < data_end(); }
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bool contains(address addr) const { return content_contains(addr); }
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bool is_frame_complete_at(address addr) const { return code_contains(addr) &&
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addr >= code_begin() + _frame_complete_offset; }
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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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// 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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void print() const { print_on(tty); }
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virtual void print_on(outputStream* st) const;
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virtual void print_value_on(outputStream* st) const;
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// Deal with Disassembler, VTune, Forte, JvmtiExport, MemoryService.
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static void trace_new_stub(CodeBlob* blob, const char* name1, const char* name2 = "");
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// Print the comment associated with offset on stream, if there is one
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virtual void print_block_comment(outputStream* stream, address block_begin) const {
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intptr_t offset = (intptr_t)(block_begin - code_begin());
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_strings.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_strings(CodeStrings& strings) {
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_strings.assign(strings);
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}
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};
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class WhiteBox;
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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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friend class AdapterBlob;
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friend class MethodHandlesAdapterBlob;
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friend class WhiteBox;
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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) throw();
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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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virtual bool is_buffer_blob() const { return true; }
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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 verify();
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void print_on(outputStream* st) const;
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void print_value_on(outputStream* st) const;
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};
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//----------------------------------------------------------------------------------------------------
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// AdapterBlob: used to hold C2I/I2C adapters
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class AdapterBlob: public BufferBlob {
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private:
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AdapterBlob(int size, CodeBuffer* cb);
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public:
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// Creation
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static AdapterBlob* create(CodeBuffer* cb);
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// Typing
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virtual bool is_adapter_blob() const { return true; }
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};
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//----------------------------------------------------------------------------------------------------
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// MethodHandlesAdapterBlob: used to hold MethodHandles adapters
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class MethodHandlesAdapterBlob: public BufferBlob {
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private:
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MethodHandlesAdapterBlob(int size) : BufferBlob("MethodHandles adapters", size) {}
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public:
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// Creation
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static MethodHandlesAdapterBlob* create(int buffer_size);
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// Typing
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virtual bool is_method_handles_adapter_blob() const { return true; }
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};
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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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CodeBuffer* cb,
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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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bool caller_must_gc_arguments
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);
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void* operator new(size_t s, unsigned size) throw();
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public:
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// Creation
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static RuntimeStub* new_runtime_stub(
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const char* stub_name,
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CodeBuffer* cb,
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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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bool caller_must_gc_arguments
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);
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// Typing
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bool is_runtime_stub() const { return true; }
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// GC support
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bool caller_must_gc_arguments(JavaThread* thread) const { return _caller_must_gc_arguments; }
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address entry_point() { return code_begin(); }
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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 verify();
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void print_on(outputStream* st) const;
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void print_value_on(outputStream* st) const;
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};
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//----------------------------------------------------------------------------------------------------
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// Super-class for all blobs that exist in only one instance. Implements default behaviour.
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class SingletonBlob: public CodeBlob {
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friend class VMStructs;
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protected:
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void* operator new(size_t s, unsigned size) throw();
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public:
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SingletonBlob(
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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_size,
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OopMapSet* oop_maps
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)
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: CodeBlob(name, cb, header_size, size, CodeOffsets::frame_never_safe, frame_size, oop_maps)
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{};
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address entry_point() { return code_begin(); }
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bool is_alive() const { return true; }
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void verify(); // does nothing
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void print_on(outputStream* st) const;
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void print_value_on(outputStream* st) const;
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};
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//----------------------------------------------------------------------------------------------------
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// DeoptimizationBlob
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class DeoptimizationBlob: public SingletonBlob {
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friend class VMStructs;
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private:
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int _unpack_offset;
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int _unpack_with_exception;
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int _unpack_with_reexecution;
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int _unpack_with_exception_in_tls;
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// Creation support
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DeoptimizationBlob(
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CodeBuffer* cb,
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int size,
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OopMapSet* oop_maps,
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int unpack_offset,
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int unpack_with_exception_offset,
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int unpack_with_reexecution_offset,
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int frame_size
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);
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public:
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// Creation
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static DeoptimizationBlob* create(
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CodeBuffer* cb,
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OopMapSet* oop_maps,
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int unpack_offset,
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int unpack_with_exception_offset,
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int unpack_with_reexecution_offset,
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int frame_size
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);
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// Typing
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bool is_deoptimization_stub() const { return true; }
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bool exception_address_is_unpack_entry(address pc) const {
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address unpack_pc = unpack();
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return (pc == unpack_pc || (pc + frame::pc_return_offset) == unpack_pc);
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}
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// GC for args
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void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* Nothing to do */ }
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// Printing
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void print_value_on(outputStream* st) const;
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address unpack() const { return code_begin() + _unpack_offset; }
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address unpack_with_exception() const { return code_begin() + _unpack_with_exception; }
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address unpack_with_reexecution() const { return code_begin() + _unpack_with_reexecution; }
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// Alternate entry point for C1 where the exception and issuing pc
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// are in JavaThread::_exception_oop and JavaThread::_exception_pc
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// instead of being in registers. This is needed because C1 doesn't
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// model exception paths in a way that keeps these registers free so
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// there may be live values in those registers during deopt.
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void set_unpack_with_exception_in_tls_offset(int offset) {
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_unpack_with_exception_in_tls = offset;
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assert(code_contains(code_begin() + _unpack_with_exception_in_tls), "must be PC inside codeblob");
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}
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address unpack_with_exception_in_tls() const { return code_begin() + _unpack_with_exception_in_tls; }
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};
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//----------------------------------------------------------------------------------------------------
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// UncommonTrapBlob (currently only used by Compiler 2)
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#ifdef COMPILER2
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class UncommonTrapBlob: public SingletonBlob {
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friend class VMStructs;
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private:
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// Creation support
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UncommonTrapBlob(
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CodeBuffer* cb,
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int size,
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OopMapSet* oop_maps,
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int frame_size
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);
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public:
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// Creation
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static UncommonTrapBlob* create(
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CodeBuffer* cb,
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OopMapSet* oop_maps,
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int frame_size
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);
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// GC for args
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void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* nothing to do */ }
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// Typing
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bool is_uncommon_trap_stub() const { return true; }
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};
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//----------------------------------------------------------------------------------------------------
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// ExceptionBlob: used for exception unwinding in compiled code (currently only used by Compiler 2)
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class ExceptionBlob: public SingletonBlob {
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friend class VMStructs;
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private:
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// Creation support
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ExceptionBlob(
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CodeBuffer* cb,
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int size,
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OopMapSet* oop_maps,
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int frame_size
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);
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public:
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// Creation
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static ExceptionBlob* create(
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CodeBuffer* cb,
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OopMapSet* oop_maps,
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int frame_size
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);
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// GC for args
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void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { /* nothing to do */ }
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// Typing
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bool is_exception_stub() const { return true; }
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};
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#endif // COMPILER2
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//----------------------------------------------------------------------------------------------------
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// SafepointBlob: handles illegal_instruction exceptions during a safepoint
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class SafepointBlob: public SingletonBlob {
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friend class VMStructs;
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private:
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// Creation support
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SafepointBlob(
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CodeBuffer* cb,
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int size,
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OopMapSet* oop_maps,
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int frame_size
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);
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public:
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// Creation
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static SafepointBlob* create(
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CodeBuffer* cb,
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OopMapSet* oop_maps,
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int frame_size
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);
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// GC for args
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void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { /* nothing to do */ }
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// Typing
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bool is_safepoint_stub() const { return true; }
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};
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#endif // SHARE_VM_CODE_CODEBLOB_HPP
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