1 //===- NamePool.cpp -------------------------------------------------------===//
2 //
3 // The MCLinker Project
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 #include "mcld/LD/NamePool.h"
10
11 #include "mcld/LD/StaticResolver.h"
12
13 #include <llvm/Support/raw_ostream.h>
14
15 namespace mcld {
16
17 //===----------------------------------------------------------------------===//
18 // NamePool
19 //===----------------------------------------------------------------------===//
NamePool(NamePool::size_type pSize)20 NamePool::NamePool(NamePool::size_type pSize)
21 : m_pResolver(new StaticResolver()), m_Table(pSize) {
22 }
23
~NamePool()24 NamePool::~NamePool() {
25 delete m_pResolver;
26
27 FreeInfoSet::iterator info, iEnd = m_FreeInfoSet.end();
28 for (info = m_FreeInfoSet.begin(); info != iEnd; ++info) {
29 ResolveInfo::Destroy(*info);
30 }
31 }
32
33 /// createSymbol - create a symbol
createSymbol(const llvm::StringRef & pName,bool pIsDyn,ResolveInfo::Type pType,ResolveInfo::Desc pDesc,ResolveInfo::Binding pBinding,ResolveInfo::SizeType pSize,ResolveInfo::Visibility pVisibility)34 ResolveInfo* NamePool::createSymbol(const llvm::StringRef& pName,
35 bool pIsDyn,
36 ResolveInfo::Type pType,
37 ResolveInfo::Desc pDesc,
38 ResolveInfo::Binding pBinding,
39 ResolveInfo::SizeType pSize,
40 ResolveInfo::Visibility pVisibility) {
41 ResolveInfo** result = m_FreeInfoSet.allocate();
42 (*result) = ResolveInfo::Create(pName);
43 (*result)->setIsSymbol(true);
44 (*result)->setSource(pIsDyn);
45 (*result)->setType(pType);
46 (*result)->setDesc(pDesc);
47 (*result)->setBinding(pBinding);
48 (*result)->setVisibility(pVisibility);
49 (*result)->setSize(pSize);
50 return *result;
51 }
52
53 /// insertSymbol - insert a symbol and resolve it immediately
54 /// @return the pointer of resolved ResolveInfo
55 /// @return is the symbol existent?
insertSymbol(const llvm::StringRef & pName,bool pIsDyn,ResolveInfo::Type pType,ResolveInfo::Desc pDesc,ResolveInfo::Binding pBinding,ResolveInfo::SizeType pSize,LDSymbol::ValueType pValue,ResolveInfo::Visibility pVisibility,ResolveInfo * pOldInfo,Resolver::Result & pResult)56 void NamePool::insertSymbol(const llvm::StringRef& pName,
57 bool pIsDyn,
58 ResolveInfo::Type pType,
59 ResolveInfo::Desc pDesc,
60 ResolveInfo::Binding pBinding,
61 ResolveInfo::SizeType pSize,
62 LDSymbol::ValueType pValue,
63 ResolveInfo::Visibility pVisibility,
64 ResolveInfo* pOldInfo,
65 Resolver::Result& pResult) {
66 // We should check if there is any symbol with the same name existed.
67 // If it already exists, we should use resolver to decide which symbol
68 // should be reserved. Otherwise, we insert the symbol and set up its
69 // attributes.
70 bool exist = false;
71 ResolveInfo* old_symbol = m_Table.insert(pName, exist);
72 ResolveInfo* new_symbol = NULL;
73 if (exist && old_symbol->isSymbol()) {
74 new_symbol = m_Table.getEntryFactory().produce(pName);
75 } else {
76 exist = false;
77 new_symbol = old_symbol;
78 }
79
80 new_symbol->setIsSymbol(true);
81 new_symbol->setSource(pIsDyn);
82 new_symbol->setType(pType);
83 new_symbol->setDesc(pDesc);
84 new_symbol->setBinding(pBinding);
85 new_symbol->setVisibility(pVisibility);
86 new_symbol->setSize(pSize);
87
88 if (!exist) {
89 // old_symbol is neither existed nor a symbol.
90 pResult.info = new_symbol;
91 pResult.existent = false;
92 pResult.overriden = true;
93 return;
94 } else if (pOldInfo != NULL) {
95 // existent, remember its attribute
96 pOldInfo->override(*old_symbol);
97 }
98
99 // exist and is a symbol
100 // symbol resolution
101 bool override = false;
102 unsigned int action = Resolver::LastAction;
103 if (m_pResolver->resolve(*old_symbol, *new_symbol, override, pValue)) {
104 pResult.info = old_symbol;
105 pResult.existent = true;
106 pResult.overriden = override;
107 } else {
108 m_pResolver->resolveAgain(*this, action, *old_symbol, *new_symbol, pResult);
109 }
110
111 m_Table.getEntryFactory().destroy(new_symbol);
112 return;
113 }
114
insertString(const llvm::StringRef & pString)115 llvm::StringRef NamePool::insertString(const llvm::StringRef& pString) {
116 bool exist = false;
117 ResolveInfo* resolve_info = m_Table.insert(pString, exist);
118 return llvm::StringRef(resolve_info->name(), resolve_info->nameSize());
119 }
120
reserve(NamePool::size_type pSize)121 void NamePool::reserve(NamePool::size_type pSize) {
122 m_Table.rehash(pSize);
123 }
124
capacity() const125 NamePool::size_type NamePool::capacity() const {
126 return (m_Table.numOfBuckets() - m_Table.numOfEntries());
127 }
128
129 /// findInfo - find the resolved ResolveInfo
findInfo(const llvm::StringRef & pName)130 ResolveInfo* NamePool::findInfo(const llvm::StringRef& pName) {
131 Table::iterator iter = m_Table.find(pName);
132 return iter.getEntry();
133 }
134
135 /// findInfo - find the resolved ResolveInfo
findInfo(const llvm::StringRef & pName) const136 const ResolveInfo* NamePool::findInfo(const llvm::StringRef& pName) const {
137 Table::const_iterator iter = m_Table.find(pName);
138 return iter.getEntry();
139 }
140
141 /// findSymbol - find the resolved output LDSymbol
findSymbol(const llvm::StringRef & pName)142 LDSymbol* NamePool::findSymbol(const llvm::StringRef& pName) {
143 ResolveInfo* info = findInfo(pName);
144 if (info == NULL)
145 return NULL;
146 return info->outSymbol();
147 }
148
149 /// findSymbol - find the resolved output LDSymbol
findSymbol(const llvm::StringRef & pName) const150 const LDSymbol* NamePool::findSymbol(const llvm::StringRef& pName) const {
151 const ResolveInfo* info = findInfo(pName);
152 if (info == NULL)
153 return NULL;
154 return info->outSymbol();
155 }
156
157 } // namespace mcld
158