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annotate src/share/vm/runtime/stubCodeGenerator.hpp @ 18096:ca6d25be853b jdk8u25-b13
8044269: Analysis of archive files.
Summary: Add checksum verification.
Reviewed-by: iklam, dholmes, mschoene
| author | jiangli |
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| date | Tue, 12 Aug 2014 17:46:16 -0400 |
| parents | b9a9ed0f8eeb |
| children | 63a4eb8bcd23 |
| rev | line source |
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| 0 | 1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_RUNTIME_STUBCODEGENERATOR_HPP |
| 26 #define SHARE_VM_RUNTIME_STUBCODEGENERATOR_HPP | |
| 27 | |
| 28 #include "asm/assembler.hpp" | |
| 29 #include "memory/allocation.hpp" | |
| 30 | |
| 0 | 31 // All the basic framework for stubcode generation/debugging/printing. |
| 32 | |
| 33 | |
| 34 // A StubCodeDesc describes a piece of generated code (usually stubs). | |
| 35 // This information is mainly useful for debugging and printing. | |
| 36 // Currently, code descriptors are simply chained in a linked list, | |
| 37 // this may have to change if searching becomes too slow. | |
| 38 | |
| 6197 | 39 class StubCodeDesc: public CHeapObj<mtCode> { |
| 0 | 40 protected: |
| 41 static StubCodeDesc* _list; // the list of all descriptors | |
| 42 static int _count; // length of list | |
| 43 | |
| 44 StubCodeDesc* _next; // the next element in the linked list | |
| 45 const char* _group; // the group to which the stub code belongs | |
| 46 const char* _name; // the name assigned to the stub code | |
| 47 int _index; // serial number assigned to the stub | |
| 48 address _begin; // points to the first byte of the stub code (included) | |
| 49 address _end; // points to the first byte after the stub code (excluded) | |
| 50 | |
| 51 void set_end(address end) { | |
| 52 assert(_begin <= end, "begin & end not properly ordered"); | |
| 53 _end = end; | |
| 54 } | |
| 55 | |
| 56 void set_begin(address begin) { | |
| 57 assert(begin >= _begin, "begin may not decrease"); | |
| 58 assert(_end == NULL || begin <= _end, "begin & end not properly ordered"); | |
| 59 _begin = begin; | |
| 60 } | |
| 61 | |
| 62 friend class StubCodeMark; | |
| 63 friend class StubCodeGenerator; | |
| 64 | |
| 65 public: | |
| 66 static StubCodeDesc* desc_for(address pc); // returns the code descriptor for the code containing pc or NULL | |
| 67 static StubCodeDesc* desc_for_index(int); // returns the code descriptor for the index or NULL | |
| 68 static const char* name_for(address pc); // returns the name of the code containing pc or NULL | |
| 69 | |
| 70 StubCodeDesc(const char* group, const char* name, address begin) { | |
| 71 assert(name != NULL, "no name specified"); | |
| 72 _next = _list; | |
| 73 _group = group; | |
| 74 _name = name; | |
| 75 _index = ++_count; // (never zero) | |
| 76 _begin = begin; | |
| 77 _end = NULL; | |
| 78 _list = this; | |
| 79 }; | |
| 80 | |
| 81 const char* group() const { return _group; } | |
| 82 const char* name() const { return _name; } | |
| 83 int index() const { return _index; } | |
| 84 address begin() const { return _begin; } | |
| 85 address end() const { return _end; } | |
| 86 int size_in_bytes() const { return _end - _begin; } | |
| 87 bool contains(address pc) const { return _begin <= pc && pc < _end; } | |
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88 void print_on(outputStream* st) const; |
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89 void print() const { print_on(tty); } |
| 0 | 90 }; |
| 91 | |
| 92 // The base class for all stub-generating code generators. | |
| 93 // Provides utility functions. | |
| 94 | |
| 95 class StubCodeGenerator: public StackObj { | |
| 96 protected: | |
| 97 MacroAssembler* _masm; | |
| 98 | |
| 99 StubCodeDesc* _first_stub; | |
| 100 StubCodeDesc* _last_stub; | |
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101 bool _print_code; |
| 0 | 102 |
| 103 public: | |
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104 StubCodeGenerator(CodeBuffer* code, bool print_code = false); |
| 0 | 105 ~StubCodeGenerator(); |
| 106 | |
| 107 MacroAssembler* assembler() const { return _masm; } | |
| 108 | |
| 109 virtual void stub_prolog(StubCodeDesc* cdesc); // called by StubCodeMark constructor | |
| 110 virtual void stub_epilog(StubCodeDesc* cdesc); // called by StubCodeMark destructor | |
| 111 }; | |
| 112 | |
| 113 | |
| 114 // Stack-allocated helper class used to assciate a stub code with a name. | |
| 115 // All stub code generating functions that use a StubCodeMark will be registered | |
| 116 // in the global StubCodeDesc list and the generated stub code can be identified | |
| 117 // later via an address pointing into it. | |
| 118 | |
| 119 class StubCodeMark: public StackObj { | |
| 120 protected: | |
| 121 StubCodeGenerator* _cgen; | |
| 122 StubCodeDesc* _cdesc; | |
| 123 | |
| 124 public: | |
| 125 StubCodeMark(StubCodeGenerator* cgen, const char* group, const char* name); | |
| 126 ~StubCodeMark(); | |
| 127 | |
| 128 }; | |
| 1972 | 129 |
| 130 #endif // SHARE_VM_RUNTIME_STUBCODEGENERATOR_HPP |