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Changes necessary to enable linking of archives without LLVM symbol tables.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17811 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Spencer
2004-11-15 01:20:11 +00:00
parent 6238a85e4f
commit 766b793143
6 changed files with 147 additions and 35 deletions
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49
lib/Bytecode/Archive/ArchiveReader.cpp
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@ -391,13 +391,58 @@ Archive::findModuleDefiningSymbol(const std::string& symbol) {
// ModuleProviders that define those symbols.
void
Archive::findModulesDefiningSymbols(const std::set<std::string>& symbols,
std::set<ModuleProvider*>& modules)
std::set<ModuleProvider*>& result)
{
assert(mapfile && base && "Can't findModulesDefiningSymbols on new archive");
if (symTab.empty()) {
// We don't have a symbol table, so we must build it now but lets also
// make sure that we populate the modules table as we do this to ensure
// that we don't load them twice when findModuleDefiningSymbol is called
// below.
// Get a pointer to the first file
const char* At = ((const char*)base) + firstFileOffset;
const char* End = ((const char*)base) + mapfile->size();
while ( At < End) {
// Compute the offset to be put in the symbol table
unsigned offset = At - base - firstFileOffset;
// Parse the file's header
ArchiveMember* mbr = parseMemberHeader(At, End);
// If it contains symbols
if (mbr->isBytecode() || mbr->isCompressedBytecode()) {
// Get the symbols
std::vector<std::string> symbols;
ModuleProvider* MP = GetBytecodeSymbols((const unsigned char*)At,
mbr->getSize(), mbr->getPath().get(),symbols);
if (MP) {
// Insert the module's symbols into the symbol table
for (std::vector<std::string>::iterator I = symbols.begin(),
E=symbols.end(); I != E; ++I ) {
symTab.insert(std::make_pair(*I,offset));
}
// Insert the ModuleProvider and the ArchiveMember into the table of
// modules.
modules.insert(std::make_pair(offset,std::make_pair(MP,mbr)));
} else {
throw std::string("Can't parse bytecode member: ") +
mbr->getPath().get();
}
}
}
}
// At this point we have a valid symbol table (one way or another) so we
// just use it to quickly find the symbols requested.
for (std::set<std::string>::const_iterator I=symbols.begin(),
E=symbols.end(); I != E; ++I) {
ModuleProvider* mp = findModuleDefiningSymbol(*I);
if (mp) {
modules.insert(mp);
result.insert(mp);
}
}
}