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-rw-r--r--lib/Bytecode/Archive/Archive.cpp271
1 files changed, 0 insertions, 271 deletions
diff --git a/lib/Bytecode/Archive/Archive.cpp b/lib/Bytecode/Archive/Archive.cpp
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-//===-- Archive.cpp - Generic LLVM archive functions ------------*- C++ -*-===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file was developed by Reid Spencer and is distributed under the
-// University of Illinois Open Source License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file contains the implementation of the Archive and ArchiveMember
-// classes that is common to both reading and writing archives..
-//
-//===----------------------------------------------------------------------===//
-
-#include "ArchiveInternals.h"
-#include "llvm/Bitcode/ReaderWriter.h"
-#include "llvm/ModuleProvider.h"
-#include "llvm/Module.h"
-#include "llvm/Support/MemoryBuffer.h"
-#include "llvm/System/Process.h"
-using namespace llvm;
-
-// getMemberSize - compute the actual physical size of the file member as seen
-// on disk. This isn't the size of member's payload. Use getSize() for that.
-unsigned
-ArchiveMember::getMemberSize() const {
- // Basically its the file size plus the header size
- unsigned result = info.fileSize + sizeof(ArchiveMemberHeader);
-
- // If it has a long filename, include the name length
- if (hasLongFilename())
- result += path.toString().length() + 1;
-
- // If its now odd lengthed, include the padding byte
- if (result % 2 != 0 )
- result++;
-
- return result;
-}
-
-// This default constructor is only use by the ilist when it creates its
-// sentry node. We give it specific static values to make it stand out a bit.
-ArchiveMember::ArchiveMember()
- : next(0), prev(0), parent(0), path("--invalid--"), flags(0), data(0)
-{
- info.user = sys::Process::GetCurrentUserId();
- info.group = sys::Process::GetCurrentGroupId();
- info.mode = 0777;
- info.fileSize = 0;
- info.modTime = sys::TimeValue::now();
-}
-
-// This is the constructor that the Archive class uses when it is building or
-// reading an archive. It just defaults a few things and ensures the parent is
-// set for the iplist. The Archive class fills in the ArchiveMember's data.
-// This is required because correctly setting the data may depend on other
-// things in the Archive.
-ArchiveMember::ArchiveMember(Archive* PAR)
- : next(0), prev(0), parent(PAR), path(), flags(0), data(0)
-{
-}
-
-// This method allows an ArchiveMember to be replaced with the data for a
-// different file, presumably as an update to the member. It also makes sure
-// the flags are reset correctly.
-bool ArchiveMember::replaceWith(const sys::Path& newFile, std::string* ErrMsg) {
- if (!newFile.exists()) {
- if (ErrMsg)
- *ErrMsg = "Can not replace an archive member with a non-existent file";
- return true;
- }
-
- data = 0;
- path = newFile;
-
- // SVR4 symbol tables have an empty name
- if (path.toString() == ARFILE_SVR4_SYMTAB_NAME)
- flags |= SVR4SymbolTableFlag;
- else
- flags &= ~SVR4SymbolTableFlag;
-
- // BSD4.4 symbol tables have a special name
- if (path.toString() == ARFILE_BSD4_SYMTAB_NAME)
- flags |= BSD4SymbolTableFlag;
- else
- flags &= ~BSD4SymbolTableFlag;
-
- // LLVM symbol tables have a very specific name
- if (path.toString() == ARFILE_LLVM_SYMTAB_NAME)
- flags |= LLVMSymbolTableFlag;
- else
- flags &= ~LLVMSymbolTableFlag;
-
- // String table name
- if (path.toString() == ARFILE_STRTAB_NAME)
- flags |= StringTableFlag;
- else
- flags &= ~StringTableFlag;
-
- // If it has a slash then it has a path
- bool hasSlash = path.toString().find('/') != std::string::npos;
- if (hasSlash)
- flags |= HasPathFlag;
- else
- flags &= ~HasPathFlag;
-
- // If it has a slash or its over 15 chars then its a long filename format
- if (hasSlash || path.toString().length() > 15)
- flags |= HasLongFilenameFlag;
- else
- flags &= ~HasLongFilenameFlag;
-
- // Get the signature and status info
- const char* signature = (const char*) data;
- std::string magic;
- if (!signature) {
- path.getMagicNumber(magic,4);
- signature = magic.c_str();
- std::string err;
- const sys::FileStatus *FSinfo = path.getFileStatus(false, ErrMsg);
- if (FSinfo)
- info = *FSinfo;
- else
- return true;
- }
-
- // Determine what kind of file it is
- switch (sys::IdentifyFileType(signature,4)) {
- case sys::Bytecode_FileType:
- flags |= BytecodeFlag;
- break;
- case sys::CompressedBytecode_FileType:
- flags |= CompressedBytecodeFlag;
- flags &= ~CompressedFlag;
- break;
- default:
- flags &= ~(BytecodeFlag|CompressedBytecodeFlag);
- break;
- }
- return false;
-}
-
-// Archive constructor - this is the only constructor that gets used for the
-// Archive class. Everything else (default,copy) is deprecated. This just
-// initializes and maps the file into memory, if requested.
-Archive::Archive(const sys::Path& filename)
- : archPath(filename), members(), mapfile(0), base(0), symTab(), strtab(),
- symTabSize(0), firstFileOffset(0), modules(), foreignST(0) {
-}
-
-bool
-Archive::mapToMemory(std::string* ErrMsg)
-{
- mapfile = new sys::MappedFile();
- if (mapfile->open(archPath, sys::MappedFile::READ_ACCESS, ErrMsg))
- return true;
- if (!(base = (char*) mapfile->map(ErrMsg)))
- return true;
- return false;
-}
-
-void Archive::cleanUpMemory() {
- // Shutdown the file mapping
- if (mapfile) {
- mapfile->close();
- delete mapfile;
-
- mapfile = 0;
- base = 0;
- }
-
- // Forget the entire symbol table
- symTab.clear();
- symTabSize = 0;
-
- firstFileOffset = 0;
-
- // Free the foreign symbol table member
- if (foreignST) {
- delete foreignST;
- foreignST = 0;
- }
-
- // Delete any ModuleProviders and ArchiveMember's we've allocated as a result
- // of symbol table searches.
- for (ModuleMap::iterator I=modules.begin(), E=modules.end(); I != E; ++I ) {
- delete I->second.first;
- delete I->second.second;
- }
-}
-
-// Archive destructor - just clean up memory
-Archive::~Archive() {
- cleanUpMemory();
-}
-
-
-
-static void getSymbols(Module*M, std::vector<std::string>& symbols) {
- // Loop over global variables
- for (Module::global_iterator GI = M->global_begin(), GE=M->global_end(); GI != GE; ++GI)
- if (!GI->isDeclaration() && !GI->hasInternalLinkage())
- if (!GI->getName().empty())
- symbols.push_back(GI->getName());
-
- // Loop over functions.
- for (Module::iterator FI = M->begin(), FE = M->end(); FI != FE; ++FI)
- if (!FI->isDeclaration() && !FI->hasInternalLinkage())
- if (!FI->getName().empty())
- symbols.push_back(FI->getName());
-}
-
-// Get just the externally visible defined symbols from the bytecode
-bool llvm::GetBytecodeSymbols(const sys::Path& fName,
- std::vector<std::string>& symbols,
- std::string* ErrMsg) {
- std::auto_ptr<MemoryBuffer> Buffer(
- MemoryBuffer::getFileOrSTDIN(&fName.toString()[0],
- fName.toString().size()));
- if (!Buffer.get()) {
- if (ErrMsg) *ErrMsg = "Could not open file '" + fName.toString() + "'";
- return true;
- }
-
- ModuleProvider *MP = getBitcodeModuleProvider(Buffer.get(), ErrMsg);
- if (!MP)
- return true;
-
- // Get the module from the provider
- Module* M = MP->materializeModule();
- if (M == 0) {
- delete MP;
- return true;
- }
-
- // Get the symbols
- getSymbols(M, symbols);
-
- // Done with the module.
- delete MP;
- return true;
-}
-
-ModuleProvider*
-llvm::GetBytecodeSymbols(const unsigned char *BufPtr, unsigned Length,
- const std::string& ModuleID,
- std::vector<std::string>& symbols,
- std::string* ErrMsg) {
- // Get the module provider
- MemoryBuffer *Buffer =MemoryBuffer::getNewMemBuffer(Length, ModuleID.c_str());
- memcpy((char*)Buffer->getBufferStart(), BufPtr, Length);
-
- ModuleProvider *MP = getBitcodeModuleProvider(Buffer, ErrMsg);
- if (!MP)
- return 0;
-
- // Get the module from the provider
- Module* M = MP->materializeModule();
- if (M == 0) {
- delete MP;
- return 0;
- }
-
- // Get the symbols
- getSymbols(M, symbols);
-
- // Done with the module. Note that ModuleProvider will delete the
- // Module when it is deleted. Also note that its the caller's responsibility
- // to delete the ModuleProvider.
- return MP;
-}
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