Mercurial > hg > graal-compiler

comparison src/share/vm/utilities/elfFile.cpp @ 14456:abec000618bf

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Merge
author kvn
date Tue, 28 Jan 2014 12:25:34 -0800
parents de6a9e811145 e7cbc95179c4
children e5e8aa897002 4ca6dc0799b6
comparison
equal deleted inserted replaced
14269:2a8891e0a082 14456:abec000618bf
32 #include <new> 32 #include <new>
33 33
34 #include "memory/allocation.inline.hpp" 34 #include "memory/allocation.inline.hpp"
35 #include "utilities/decoder.hpp" 35 #include "utilities/decoder.hpp"
36 #include "utilities/elfFile.hpp" 36 #include "utilities/elfFile.hpp"
37 #include "utilities/elfFuncDescTable.hpp"
37 #include "utilities/elfStringTable.hpp" 38 #include "utilities/elfStringTable.hpp"
38 #include "utilities/elfSymbolTable.hpp" 39 #include "utilities/elfSymbolTable.hpp"
39 40
40 41
41 ElfFile::ElfFile(const char* filepath) { 42 ElfFile::ElfFile(const char* filepath) {
42 assert(filepath, "null file path"); 43 assert(filepath, "null file path");
43 memset(&m_elfHdr, 0, sizeof(m_elfHdr)); 44 memset(&m_elfHdr, 0, sizeof(m_elfHdr));
44 m_string_tables = NULL; 45 m_string_tables = NULL;
45 m_symbol_tables = NULL; 46 m_symbol_tables = NULL;
47 m_funcDesc_table = NULL;
46 m_next = NULL; 48 m_next = NULL;
47 m_status = NullDecoder::no_error; 49 m_status = NullDecoder::no_error;
48 50
49 int len = strlen(filepath) + 1; 51 int len = strlen(filepath) + 1;
50 m_filepath = (const char*)os::malloc(len * sizeof(char), mtInternal); 52 m_filepath = (const char*)os::malloc(len * sizeof(char), mtInternal);
117 for (int index = 0; index < m_elfHdr.e_shnum; index ++) { 119 for (int index = 0; index < m_elfHdr.e_shnum; index ++) {
118 if (fread((void*)&shdr, sizeof(Elf_Shdr), 1, m_file) != 1) { 120 if (fread((void*)&shdr, sizeof(Elf_Shdr), 1, m_file) != 1) {
119 m_status = NullDecoder::file_invalid; 121 m_status = NullDecoder::file_invalid;
120 return false; 122 return false;
121 } 123 }
122 // string table
123 if (shdr.sh_type == SHT_STRTAB) { 124 if (shdr.sh_type == SHT_STRTAB) {
125 // string tables
124 ElfStringTable* table = new (std::nothrow) ElfStringTable(m_file, shdr, index); 126 ElfStringTable* table = new (std::nothrow) ElfStringTable(m_file, shdr, index);
125 if (table == NULL) { 127 if (table == NULL) {
126 m_status = NullDecoder::out_of_memory; 128 m_status = NullDecoder::out_of_memory;
127 return false; 129 return false;
128 } 130 }
129 add_string_table(table); 131 add_string_table(table);
130 } else if (shdr.sh_type == SHT_SYMTAB || shdr.sh_type == SHT_DYNSYM) { 132 } else if (shdr.sh_type == SHT_SYMTAB || shdr.sh_type == SHT_DYNSYM) {
133 // symbol tables
131 ElfSymbolTable* table = new (std::nothrow) ElfSymbolTable(m_file, shdr); 134 ElfSymbolTable* table = new (std::nothrow) ElfSymbolTable(m_file, shdr);
132 if (table == NULL) { 135 if (table == NULL) {
133 m_status = NullDecoder::out_of_memory; 136 m_status = NullDecoder::out_of_memory;
134 return false; 137 return false;
135 } 138 }
136 add_symbol_table(table); 139 add_symbol_table(table);
137 } 140 }
138 } 141 }
142
143 #if defined(PPC64)
144 // Now read the .opd section wich contains the PPC64 function descriptor table.
145 // The .opd section is only available on PPC64 (see for example:
146 // http://refspecs.linuxfoundation.org/LSB_3.1.1/LSB-Core-PPC64/LSB-Core-PPC64/specialsections.html)
147 // so this code should do no harm on other platforms but because of performance reasons we only
148 // execute it on PPC64 platforms.
149 // Notice that we can only find the .opd section after we have successfully read in the string
150 // tables in the previous loop, because we need to query the name of each section which is
151 // contained in one of the string tables (i.e. the one with the index m_elfHdr.e_shstrndx).
152
153 // Reset the file pointer
154 if (fseek(m_file, m_elfHdr.e_shoff, SEEK_SET)) {
155 m_status = NullDecoder::file_invalid;
156 return false;
157 }
158 for (int index = 0; index < m_elfHdr.e_shnum; index ++) {
159 if (fread((void*)&shdr, sizeof(Elf_Shdr), 1, m_file) != 1) {
160 m_status = NullDecoder::file_invalid;
161 return false;
162 }
163 if (m_elfHdr.e_shstrndx != SHN_UNDEF && shdr.sh_type == SHT_PROGBITS) {
164 ElfStringTable* string_table = get_string_table(m_elfHdr.e_shstrndx);
165 if (string_table == NULL) {
166 m_status = NullDecoder::file_invalid;
167 return false;
168 }
169 char buf[8]; // '8' is enough because we only want to read ".opd"
170 if (string_table->string_at(shdr.sh_name, buf, sizeof(buf)) && !strncmp(".opd", buf, 4)) {
171 m_funcDesc_table = new (std::nothrow) ElfFuncDescTable(m_file, shdr, index);
172 if (m_funcDesc_table == NULL) {
173 m_status = NullDecoder::out_of_memory;
174 return false;
175 }
176 break;
177 }
178 }
179 }
180 #endif
181
139 } 182 }
140 return true; 183 return true;
141 } 184 }
142 185
143 bool ElfFile::decode(address addr, char* buf, int buflen, int* offset) { 186 bool ElfFile::decode(address addr, char* buf, int buflen, int* offset) {
149 int string_table_index; 192 int string_table_index;
150 int pos_in_string_table; 193 int pos_in_string_table;
151 int off = INT_MAX; 194 int off = INT_MAX;
152 bool found_symbol = false; 195 bool found_symbol = false;
153 while (symbol_table != NULL) { 196 while (symbol_table != NULL) {
154 if (symbol_table->lookup(addr, &string_table_index, &pos_in_string_table, &off)) { 197 if (symbol_table->lookup(addr, &string_table_index, &pos_in_string_table, &off, m_funcDesc_table)) {
155 found_symbol = true; 198 found_symbol = true;
199 break;
156 } 200 }
157 symbol_table = symbol_table->m_next; 201 symbol_table = symbol_table->m_next;
158 } 202 }
159 if (!found_symbol) return false; 203 if (!found_symbol) return false;
160 204
219 } 263 }
220 return false; 264 return false;
221 } 265 }
222 #endif 266 #endif
223 267
224 #endif // _WINDOWS 268 #endif // !_WINDOWS && !__APPLE__