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-rw-r--r--lib/Archive/Archive.cpp254
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diff --git a/lib/Archive/Archive.cpp b/lib/Archive/Archive.cpp
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-//===-- Archive.cpp - Generic LLVM archive functions ------------*- C++ -*-===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file 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 "llvm/Bitcode/Archive.h"
-#include "ArchiveInternals.h"
-#include "llvm/Bitcode/ReaderWriter.h"
-#include "llvm/IR/Module.h"
-#include "llvm/Support/FileSystem.h"
-#include "llvm/Support/MemoryBuffer.h"
-#include "llvm/Support/Process.h"
-#include "llvm/Support/system_error.h"
-#include <cstring>
-#include <memory>
-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.str().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()
- : 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)
- : 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) {
- bool Exists;
- if (sys::fs::exists(newFile.str(), Exists) || !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.str() == ARFILE_SVR4_SYMTAB_NAME)
- flags |= SVR4SymbolTableFlag;
- else
- flags &= ~SVR4SymbolTableFlag;
-
- // BSD4.4 symbol tables have a special name
- if (path.str() == ARFILE_BSD4_SYMTAB_NAME)
- flags |= BSD4SymbolTableFlag;
- else
- flags &= ~BSD4SymbolTableFlag;
-
- // String table name
- if (path.str() == ARFILE_STRTAB_NAME)
- flags |= StringTableFlag;
- else
- flags &= ~StringTableFlag;
-
- // If it has a slash then it has a path
- bool hasSlash = path.str().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.str().length() > 15)
- flags |= HasLongFilenameFlag;
- else
- flags &= ~HasLongFilenameFlag;
-
- // Get the signature and status info
- const char* signature = (const char*) data;
- SmallString<4> magic;
- if (!signature) {
- sys::fs::get_magic(path.str(), magic.capacity(), magic);
- signature = magic.c_str();
- const sys::FileStatus *FSinfo = path.getFileStatus(false, ErrMsg);
- if (FSinfo)
- info = *FSinfo;
- else
- return true;
- }
-
- // Determine what kind of file it is.
- if (sys::fs::identify_magic(StringRef(signature, 4)) ==
- sys::fs::file_magic::bitcode)
- flags |= BitcodeFlag;
- else
- flags &= ~BitcodeFlag;
-
- 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, LLVMContext& C)
- : archPath(filename), members(), mapfile(0), base(0), symTab(), strtab(),
- symTabSize(0), firstFileOffset(0), modules(), foreignST(0), Context(C) {
-}
-
-bool
-Archive::mapToMemory(std::string* ErrMsg) {
- OwningPtr<MemoryBuffer> File;
- if (error_code ec = MemoryBuffer::getFile(archPath.c_str(), File)) {
- if (ErrMsg)
- *ErrMsg = ec.message();
- return true;
- }
- mapfile = File.take();
- base = mapfile->getBufferStart();
- return false;
-}
-
-void Archive::cleanUpMemory() {
- // Shutdown the file mapping
- 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 Modules 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->hasLocalLinkage())
- 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->hasLocalLinkage())
- if (!FI->getName().empty())
- symbols.push_back(FI->getName());
-
- // Loop over aliases
- for (Module::alias_iterator AI = M->alias_begin(), AE = M->alias_end();
- AI != AE; ++AI) {
- if (AI->hasName())
- symbols.push_back(AI->getName());
- }
-}
-
-// Get just the externally visible defined symbols from the bitcode
-bool llvm::GetBitcodeSymbols(const sys::Path& fName,
- LLVMContext& Context,
- std::vector<std::string>& symbols,
- std::string* ErrMsg) {
- OwningPtr<MemoryBuffer> Buffer;
- if (error_code ec = MemoryBuffer::getFileOrSTDIN(fName.c_str(), Buffer)) {
- if (ErrMsg) *ErrMsg = "Could not open file '" + fName.str() + "'" + ": "
- + ec.message();
- return true;
- }
-
- Module *M = ParseBitcodeFile(Buffer.get(), Context, ErrMsg);
- if (!M)
- return true;
-
- // Get the symbols
- getSymbols(M, symbols);
-
- // Done with the module.
- delete M;
- return true;
-}
-
-Module*
-llvm::GetBitcodeSymbols(const char *BufPtr, unsigned Length,
- const std::string& ModuleID,
- LLVMContext& Context,
- std::vector<std::string>& symbols,
- std::string* ErrMsg) {
- // Get the module.
- OwningPtr<MemoryBuffer> Buffer(
- MemoryBuffer::getMemBufferCopy(StringRef(BufPtr, Length),ModuleID.c_str()));
-
- Module *M = ParseBitcodeFile(Buffer.get(), Context, ErrMsg);
- if (!M)
- return 0;
-
- // Get the symbols
- getSymbols(M, symbols);
-
- // Done with the module. Note that it's the caller's responsibility to delete
- // the Module.
- return M;
-}