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LibSymbolInfo.cpp
Go to the documentation of this file.
1 //==========================================
2 // Matt Pietrek
3 // Microsoft Systems Journal, April 1998
4 // Program: LibDump
5 // FILE: LibSymbolInfo.CPP
6 //==========================================
7
8 // LibSymbolInfo.cpp: implementation of the CLibSymbolInfo class.
9 //
11
12
13 #include "LibSymbolInfo.h"
14
15 using namespace std;
16
17
18 #define MakePtr( cast, ptr, addValue ) (cast)( (DWORD)(ptr) + (DWORD)(addValue))
19
21 // CLibSymbolInfo
22
23 CLibSymbolInfo::CLibSymbolInfo()
24 {
25 }
26
27 CLibSymbolInfo::~CLibSymbolInfo()
28 {
29 }
30
31 //=============================================================================
32 // Function: DumpSymbols
33 //
34 // Parameters:
35 // LPTSTR lpszLibPathName - The library file path name
36 // CStdioFile* pFile - Address of the file in which to dump the symbols
37 //
38 // Description:
39 //
40 // Given a library file path name, the function dumps the symbol info into the file
41 // pointed to by pFile.
42 //=============================================================================
43 BOOL CLibSymbolInfo::DumpSymbols(LPTSTR lpszLibPathName, ostream& pFile)
44 {
45 if(lpszLibPathName == NULL || pFile.bad() ) {
46 assert(lpszLibPathName != NULL);
47 assert(pFile.good());
48 m_strErrorMsg.assign("NULL <lpszLibPathName> or Invalid file handle.");
49 return FALSE;
50 }
51
52 if(!Dump(lpszLibPathName, pFile)) return FALSE;
53 return TRUE;
54 }
55
56 //=============================================================================
57 // Function: Dump
58 //
59 // Parameters:
60 // As mentioned above.
61 //
62 // Description:
63 //
64 // Depending on the value specified in <m_bDump>/<m_bGrep> the routine dumps/greps
65 // the symbo info.
66 //=============================================================================
67 BOOL CLibSymbolInfo::Dump(LPTSTR lpszLibPathName, ostream& pFile)
68 {
69 string sBuff;
70 MEMORY_MAPPED_FILE libFile(lpszLibPathName);
71
72 // Ensure that the file mapping worked
73 if( FALSE == libFile.IsValid() ) {
74 m_strErrorMsg = "Unable to access file ";
75 m_strErrorMsg+= lpszLibPathName;
76 return FALSE;
77 }
78 // All COFF libraries start with the string "!<arch>\n". Verify that this
79 // string is at the beginning of the mapped file
80
81 PSTR pArchiveStartString = (PSTR)libFile.GetBase();
82
83 if ( 0 != strncmp( pArchiveStartString, IMAGE_ARCHIVE_START,
84 IMAGE_ARCHIVE_START_SIZE ) ) {
85 m_strErrorMsg.assign("Not a valid COFF LIB file.");
86 return FALSE;
87 }
88
89 // Point to the first archive member. This entry contains the LIB symbols,
90 // and immediately follows the archive start string ("!<arch>\n")
91 PIMAGE_ARCHIVE_MEMBER_HEADER pMbrHdr;
92 pMbrHdr = MakePtr( PIMAGE_ARCHIVE_MEMBER_HEADER, pArchiveStartString,
93 IMAGE_ARCHIVE_START_SIZE );
94
95 // First DWORD after this member header is a symbol count
96 PDWORD pcbSymbols = (PDWORD)(pMbrHdr + 1); // Pointer math!
97
98 // The symbol count is stored in big endian format, so adjust as
99 // appropriate for the target architecture
100 DWORD cSymbols = ConvertBigEndian( *pcbSymbols );
101
102 // Following the symbol count is an array of offsets to archive members
103 // (essentially, embedded .OBJ files)
104 PDWORD pMemberOffsets = pcbSymbols + 1; // Pointer math!
105
106 // Following the array of member offsets is an array of offsets to symbol
107 // names.
108 PSTR pszSymbolName = MakePtr( PSTR, pMemberOffsets, 4 * cSymbols );
109
110 //
111 // Loop through every symbol in the first archive member
112 //
113 for ( unsigned i = 0; i < cSymbols; i++ )
114 {
115 DWORD offset;
116
117 // The offsets to the archive member that contains the symbol is stored
118 // in big endian format, so convert it appropriately.
119 offset = ConvertBigEndian( *pMemberOffsets );
120
121 // Call DisplayLibInfoForSymbol, which figures out what kind of symbol
122 // it is. The "IsRegularLibSymbol" filters out symbols that are
123 // internal to the linking process
124 if ( IsRegularLibSymbol( pszSymbolName ) ) {
125 string symbol(pszSymbolName);
126 if (IsFiltedSymbol(symbol) ) {
127 pFile << symbol << endl;
128 }
129 }
130 // Advanced to the next symbol offset and name. The MemberOffsets
131 // array has fixed length entries, while the symbol names are
132 // sequential null-terminated strings
133 pMemberOffsets++;
134 pszSymbolName += strlen(pszSymbolName) + 1;
135 }
136 return TRUE;
137 }
138
139 //=============================================================================
140 // Filters out symbols that are internal to the linking process, and which
141 // the programmer never explicitly sees.
142 //=============================================================================
143 BOOL CLibSymbolInfo::IsRegularLibSymbol( PSTR pszSymbolName )
144 {
145 if ( 0 == strncmp( pszSymbolName, "__IMPORT_DESCRIPTOR_", 20 ) )
146 return FALSE;
147
148 if ( 0 == strncmp( pszSymbolName, "__NULL_IMPORT_DESCRIPTOR", 24 ) )
149 return FALSE;
150
151 if ( strstr( pszSymbolName, "_NULL_THUNK_DATA" ) )
152 return FALSE;
153
154 return TRUE;
155 }
156 //=============================================================================
157 // Filters out symbols that are not needed....
158 //=============================================================================
159 BOOL CLibSymbolInfo::IsFiltedSymbol( string& symbolName )
160 {
161 if ( symbolName.compare(0,2,"__") == 0 )
162 return FALSE;
163 if ( symbolName.compare(0,3,"??_") == 0 && symbolName[3] != '0') // Keep 'operator/=' [??_0]
164 return FALSE;
165 if( symbolName[0] == '_') {
166 symbolName.erase(0, 1); // C functions ...
167 }
168 // Filter the internal Boost symbols
169 if (symbolName.find ("detail@boost") != string::npos )
170 return FALSE;
171 if (symbolName.find ("details@boost") != string::npos )
172 return FALSE;
173 return TRUE;
174 }
175
176 //=============================================================================
177 // Converts from big endian to little endian numbers.
178 //=============================================================================
179 DWORD CLibSymbolInfo::ConvertBigEndian(DWORD bigEndian)
180 {
181 DWORD temp = 0;
182
183 temp |= bigEndian >> 24;
184 temp |= ((bigEndian & 0x00FF0000) >> 8);
185 temp |= ((bigEndian & 0x0000FF00) << 8);
186 temp |= ((bigEndian & 0x000000FF) << 24);
187
188 return temp;
189 }
190
191 string CLibSymbolInfo::GetLastError() const
192 {
193 return m_strErrorMsg;
194 }
195
196
197 MEMORY_MAPPED_FILE::MEMORY_MAPPED_FILE( PSTR pszFileName ) {
198
199 //
200 // Given a filename, the constructor opens a file handle, creates a file
201 // mapping, and maps the entire file into memory.
202 //
203 m_hFile = INVALID_HANDLE_VALUE;
204 m_hFileMapping = 0;
205 m_pMemoryMappedFileBase = 0;
206 m_cbFile = 0;
207 m_errCode = errMMF_FileOpen; // Initial error code: not found
208 // First get a file handle
209 m_hFile = CreateFile(pszFileName, GENERIC_READ, FILE_SHARE_READ, NULL,
210 OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, (HANDLE)0);
211
212 if ( m_hFile == INVALID_HANDLE_VALUE )
213 {
214 m_errCode = errMMF_FileOpen;
215 return;
216 }
217 m_cbFile = ::GetFileSize( m_hFile, 0 );
218 // Now, create a file mapping
219 m_hFileMapping = CreateFileMapping(m_hFile,NULL, PAGE_READONLY, 0, 0,NULL);
220 if ( m_hFileMapping == 0 )
221 {
222 // Oops. Something went wrong. Clean up.
223 CloseHandle(m_hFile);
224 m_hFile = INVALID_HANDLE_VALUE;
225 m_errCode = errMMF_FileMapping;
226 return;
227 }
228 m_pMemoryMappedFileBase = (PCHAR)MapViewOfFile( m_hFileMapping,
229 FILE_MAP_READ, 0, 0, 0);
230 if ( m_pMemoryMappedFileBase == 0 )
231 {
232 // Oops. Something went wrong. Clean up.
233 CloseHandle(m_hFileMapping);
234 m_hFileMapping = 0;
235 CloseHandle(m_hFile);
236 m_hFile = INVALID_HANDLE_VALUE;
237 m_errCode = errMMF_MapView;
238 return;
239 }
240 m_errCode = errMMF_NoError;
241 }
242
243 MEMORY_MAPPED_FILE::~MEMORY_MAPPED_FILE(void)
244 {
245 // Clean up everything that was created by the constructor
246 if ( m_pMemoryMappedFileBase )
247 UnmapViewOfFile( m_pMemoryMappedFileBase );
248
249 if ( m_hFileMapping )
250 CloseHandle( m_hFileMapping );
251
252 if ( m_hFile != INVALID_HANDLE_VALUE )
253 CloseHandle( m_hFile );
254
255 m_errCode = errMMF_FileOpen;
256 }
MEMORY_MAPPED_FILE::GetBase
PVOID GetBase(void)
Definition: LibSymbolInfo.h:42
CLibSymbolInfo::GetLastError
std::string GetLastError() const
Definition: LibSymbolInfo.cpp:191
errMMF_FileOpen
Definition: LibSymbolInfo.h:33
CLibSymbolInfo::CLibSymbolInfo
CLibSymbolInfo()
Definition: LibSymbolInfo.cpp:23
std::ostream::good
T good(T...args)
errMMF_MapView
Definition: LibSymbolInfo.h:34
std::endl
T endl(T...args)
std
STL namespace.
GaudiKernel.Constants.TRUE
bool TRUE
for job options legacy (TODO: get rid of these!) ----------------------—
Definition: Constants.py:20
MEMORY_MAPPED_FILE::~MEMORY_MAPPED_FILE
~MEMORY_MAPPED_FILE(void)
Definition: LibSymbolInfo.cpp:243
LibSymbolInfo.h
MakePtr
#define MakePtr(cast, ptr, addValue)
Definition: LibSymbolInfo.cpp:18
std::strlen
T strlen(T...args)
CLibSymbolInfo::Dump
BOOL Dump(LPTSTR lpszLibPathName, std::ostream &pFile)
Definition: LibSymbolInfo.cpp:67
std::string::erase
T erase(T...args)
errMMF_FileMapping
Definition: LibSymbolInfo.h:34
MEMORY_MAPPED_FILE::IsValid
BOOL IsValid(void)
Definition: LibSymbolInfo.h:44
GaudiKernel.Constants.FALSE
bool FALSE
Definition: Constants.py:21
MEMORY_MAPPED_FILE
Definition: LibSymbolInfo.h:36
std::string::find
T find(T...args)
std::strncmp
T strncmp(T...args)
CLibSymbolInfo::IsFiltedSymbol
BOOL IsFiltedSymbol(std::string &pszSymbolName)
Definition: LibSymbolInfo.cpp:159
std::strstr
T strstr(T...args)
CLibSymbolInfo::ConvertBigEndian
DWORD ConvertBigEndian(DWORD bigEndian)
Definition: LibSymbolInfo.cpp:179
MEMORY_MAPPED_FILE::MEMORY_MAPPED_FILE
MEMORY_MAPPED_FILE(PSTR pszFileName)
Definition: LibSymbolInfo.cpp:197
std::ostream
STL class.
std::ostream::bad
T bad(T...args)
CLibSymbolInfo::DumpSymbols
BOOL DumpSymbols(LPTSTR lpszLibPathName, std::ostream &pFile)
Definition: LibSymbolInfo.cpp:43
errMMF_NoError
Definition: LibSymbolInfo.h:33
std::string::compare
T compare(T...args)
CLibSymbolInfo::~CLibSymbolInfo
virtual ~CLibSymbolInfo()
Definition: LibSymbolInfo.cpp:27
CLibSymbolInfo::IsRegularLibSymbol
BOOL IsRegularLibSymbol(PSTR pszSymbolName)
Definition: LibSymbolInfo.cpp:143