Mercurial > hg > graal-jvmci-8
diff src/share/vm/runtime/stubCodeGenerator.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
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children | c18cbe5936b8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/runtime/stubCodeGenerator.hpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,120 @@ +/* + * Copyright 1997-2000 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ + +// All the basic framework for stubcode generation/debugging/printing. + + +// A StubCodeDesc describes a piece of generated code (usually stubs). +// This information is mainly useful for debugging and printing. +// Currently, code descriptors are simply chained in a linked list, +// this may have to change if searching becomes too slow. + +class StubCodeDesc: public CHeapObj { + protected: + static StubCodeDesc* _list; // the list of all descriptors + static int _count; // length of list + + StubCodeDesc* _next; // the next element in the linked list + const char* _group; // the group to which the stub code belongs + const char* _name; // the name assigned to the stub code + int _index; // serial number assigned to the stub + address _begin; // points to the first byte of the stub code (included) + address _end; // points to the first byte after the stub code (excluded) + + void set_end(address end) { + assert(_begin <= end, "begin & end not properly ordered"); + _end = end; + } + + void set_begin(address begin) { + assert(begin >= _begin, "begin may not decrease"); + assert(_end == NULL || begin <= _end, "begin & end not properly ordered"); + _begin = begin; + } + + friend class StubCodeMark; + friend class StubCodeGenerator; + + public: + static StubCodeDesc* desc_for(address pc); // returns the code descriptor for the code containing pc or NULL + static StubCodeDesc* desc_for_index(int); // returns the code descriptor for the index or NULL + static const char* name_for(address pc); // returns the name of the code containing pc or NULL + + StubCodeDesc(const char* group, const char* name, address begin) { + assert(name != NULL, "no name specified"); + _next = _list; + _group = group; + _name = name; + _index = ++_count; // (never zero) + _begin = begin; + _end = NULL; + _list = this; + }; + + const char* group() const { return _group; } + const char* name() const { return _name; } + int index() const { return _index; } + address begin() const { return _begin; } + address end() const { return _end; } + int size_in_bytes() const { return _end - _begin; } + bool contains(address pc) const { return _begin <= pc && pc < _end; } + void print(); +}; + +// The base class for all stub-generating code generators. +// Provides utility functions. + +class StubCodeGenerator: public StackObj { + protected: + MacroAssembler* _masm; + + StubCodeDesc* _first_stub; + StubCodeDesc* _last_stub; + + public: + StubCodeGenerator(CodeBuffer* code); + ~StubCodeGenerator(); + + MacroAssembler* assembler() const { return _masm; } + + virtual void stub_prolog(StubCodeDesc* cdesc); // called by StubCodeMark constructor + virtual void stub_epilog(StubCodeDesc* cdesc); // called by StubCodeMark destructor +}; + + +// Stack-allocated helper class used to assciate a stub code with a name. +// All stub code generating functions that use a StubCodeMark will be registered +// in the global StubCodeDesc list and the generated stub code can be identified +// later via an address pointing into it. + +class StubCodeMark: public StackObj { + protected: + StubCodeGenerator* _cgen; + StubCodeDesc* _cdesc; + + public: + StubCodeMark(StubCodeGenerator* cgen, const char* group, const char* name); + ~StubCodeMark(); + +};