It's not necessary to do rounding for alloca operations when the requested
alignment is equal to the stack alignment.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40004 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Archive/Archive.cpp b/lib/Archive/Archive.cpp
new file mode 100644
index 0000000..b7e7106
--- /dev/null
+++ b/lib/Archive/Archive.cpp
@@ -0,0 +1,264 @@
+//===-- 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)) {
+ default:
+ flags &= ~BitcodeFlag;
+ 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 bitcode
+bool llvm::GetBitcodeSymbols(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::GetBitcodeSymbols(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;
+}
diff --git a/lib/Archive/ArchiveInternals.h b/lib/Archive/ArchiveInternals.h
new file mode 100644
index 0000000..8648bbb
--- /dev/null
+++ b/lib/Archive/ArchiveInternals.h
@@ -0,0 +1,83 @@
+//===-- lib/Archive/ArchiveInternals.h -------------------------*- 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.
+//
+//===----------------------------------------------------------------------===//
+//
+// Internal implementation header for LLVM Archive files.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LIB_ARCHIVE_ARCHIVEINTERNALS_H
+#define LIB_ARCHIVE_ARCHIVEINTERNALS_H
+
+#include "llvm/Bitcode/Archive.h"
+#include "llvm/System/TimeValue.h"
+#include "llvm/ADT/StringExtras.h"
+
+#define ARFILE_MAGIC "!<arch>\n" ///< magic string
+#define ARFILE_MAGIC_LEN (sizeof(ARFILE_MAGIC)-1) ///< length of magic string
+#define ARFILE_SVR4_SYMTAB_NAME "/ " ///< SVR4 symtab entry name
+#define ARFILE_LLVM_SYMTAB_NAME "#_LLVM_SYM_TAB_#" ///< LLVM symtab entry name
+#define ARFILE_BSD4_SYMTAB_NAME "__.SYMDEF SORTED" ///< BSD4 symtab entry name
+#define ARFILE_STRTAB_NAME "// " ///< Name of string table
+#define ARFILE_PAD "\n" ///< inter-file align padding
+#define ARFILE_MEMBER_MAGIC "`\n" ///< fmag field magic #
+
+namespace llvm {
+
+ /// The ArchiveMemberHeader structure is used internally for bitcode
+ /// archives.
+ /// The header precedes each file member in the archive. This structure is
+ /// defined using character arrays for direct and correct interpretation
+ /// regardless of the endianess of the machine that produced it.
+ /// @brief Archive File Member Header
+ class ArchiveMemberHeader {
+ /// @name Data
+ /// @{
+ public:
+ char name[16]; ///< Name of the file member.
+ char date[12]; ///< File date, decimal seconds since Epoch
+ char uid[6]; ///< user id in ASCII decimal
+ char gid[6]; ///< group id in ASCII decimal
+ char mode[8]; ///< file mode in ASCII octal
+ char size[10]; ///< file size in ASCII decimal
+ char fmag[2]; ///< Always contains ARFILE_MAGIC_TERMINATOR
+
+ /// @}
+ /// @name Methods
+ /// @{
+ public:
+ void init() {
+ memset(name,' ',16);
+ memset(date,' ',12);
+ memset(uid,' ',6);
+ memset(gid,' ',6);
+ memset(mode,' ',8);
+ memset(size,' ',10);
+ fmag[0] = '`';
+ fmag[1] = '\n';
+ }
+
+ bool checkSignature() {
+ return 0 == memcmp(fmag, ARFILE_MEMBER_MAGIC,2);
+ }
+ };
+
+ // Get just the externally visible defined symbols from the bitcode
+ bool GetBitcodeSymbols(const sys::Path& fName,
+ std::vector<std::string>& symbols,
+ std::string* ErrMsg);
+
+ ModuleProvider* GetBitcodeSymbols(const unsigned char*Buffer,unsigned Length,
+ const std::string& ModuleID,
+ std::vector<std::string>& symbols,
+ std::string* ErrMsg);
+}
+
+#endif
+
+// vim: sw=2 ai
diff --git a/lib/Archive/ArchiveReader.cpp b/lib/Archive/ArchiveReader.cpp
new file mode 100644
index 0000000..529b652
--- /dev/null
+++ b/lib/Archive/ArchiveReader.cpp
@@ -0,0 +1,627 @@
+//===-- ArchiveReader.cpp - Read LLVM archive files -------------*- 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.
+//
+//===----------------------------------------------------------------------===//
+//
+// Builds up standard unix archive files (.a) containing LLVM bitcode.
+//
+//===----------------------------------------------------------------------===//
+
+#include "ArchiveInternals.h"
+#include "llvm/Bitcode/ReaderWriter.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Module.h"
+#include <memory>
+using namespace llvm;
+
+/// Read a variable-bit-rate encoded unsigned integer
+inline unsigned readInteger(const char*&At, const char*End){
+ unsigned Shift = 0;
+ unsigned Result = 0;
+
+ do {
+ if (At == End)
+ return Result;
+ Result |= (unsigned)((*At++) & 0x7F) << Shift;
+ Shift += 7;
+ } while (At[-1] & 0x80);
+ return Result;
+}
+
+// Completely parse the Archive's symbol table and populate symTab member var.
+bool
+Archive::parseSymbolTable(const void* data, unsigned size, std::string* error) {
+ const char* At = (const char*) data;
+ const char* End = At + size;
+ while (At < End) {
+ unsigned offset = readInteger(At, End);
+ if (At == End) {
+ if (error)
+ *error = "Ran out of data reading vbr_uint for symtab offset!";
+ return false;
+ }
+ unsigned length = readInteger(At, End);
+ if (At == End) {
+ if (error)
+ *error = "Ran out of data reading vbr_uint for symtab length!";
+ return false;
+ }
+ if (At + length > End) {
+ if (error)
+ *error = "Malformed symbol table: length not consistent with size";
+ return false;
+ }
+ // we don't care if it can't be inserted (duplicate entry)
+ symTab.insert(std::make_pair(std::string(At, length), offset));
+ At += length;
+ }
+ symTabSize = size;
+ return true;
+}
+
+// This member parses an ArchiveMemberHeader that is presumed to be pointed to
+// by At. The At pointer is updated to the byte just after the header, which
+// can be variable in size.
+ArchiveMember*
+Archive::parseMemberHeader(const char*& At, const char* End, std::string* error)
+{
+ if (At + sizeof(ArchiveMemberHeader) >= End) {
+ if (error)
+ *error = "Unexpected end of file";
+ return 0;
+ }
+
+ // Cast archive member header
+ ArchiveMemberHeader* Hdr = (ArchiveMemberHeader*)At;
+ At += sizeof(ArchiveMemberHeader);
+
+ // Extract the size and determine if the file is
+ // compressed or not (negative length).
+ int flags = 0;
+ int MemberSize = atoi(Hdr->size);
+ if (MemberSize < 0) {
+ flags |= ArchiveMember::CompressedFlag;
+ MemberSize = -MemberSize;
+ }
+
+ // Check the size of the member for sanity
+ if (At + MemberSize > End) {
+ if (error)
+ *error = "invalid member length in archive file";
+ return 0;
+ }
+
+ // Check the member signature
+ if (!Hdr->checkSignature()) {
+ if (error)
+ *error = "invalid file member signature";
+ return 0;
+ }
+
+ // Convert and check the member name
+ // The empty name ( '/' and 15 blanks) is for a foreign (non-LLVM) symbol
+ // table. The special name "//" and 14 blanks is for a string table, used
+ // for long file names. This library doesn't generate either of those but
+ // it will accept them. If the name starts with #1/ and the remainder is
+ // digits, then those digits specify the length of the name that is
+ // stored immediately following the header. The special name
+ // __LLVM_SYM_TAB__ identifies the symbol table for LLVM bitcode.
+ // Anything else is a regular, short filename that is terminated with
+ // a '/' and blanks.
+
+ std::string pathname;
+ switch (Hdr->name[0]) {
+ case '#':
+ if (Hdr->name[1] == '1' && Hdr->name[2] == '/') {
+ if (isdigit(Hdr->name[3])) {
+ unsigned len = atoi(&Hdr->name[3]);
+ pathname.assign(At, len);
+ At += len;
+ MemberSize -= len;
+ flags |= ArchiveMember::HasLongFilenameFlag;
+ } else {
+ if (error)
+ *error = "invalid long filename";
+ return 0;
+ }
+ } else if (Hdr->name[1] == '_' &&
+ (0 == memcmp(Hdr->name, ARFILE_LLVM_SYMTAB_NAME, 16))) {
+ // The member is using a long file name (>15 chars) format.
+ // This format is standard for 4.4BSD and Mac OSX operating
+ // systems. LLVM uses it similarly. In this format, the
+ // remainder of the name field (after #1/) specifies the
+ // length of the file name which occupy the first bytes of
+ // the member's data. The pathname already has the #1/ stripped.
+ pathname.assign(ARFILE_LLVM_SYMTAB_NAME);
+ flags |= ArchiveMember::LLVMSymbolTableFlag;
+ }
+ break;
+ case '/':
+ if (Hdr->name[1]== '/') {
+ if (0 == memcmp(Hdr->name, ARFILE_STRTAB_NAME, 16)) {
+ pathname.assign(ARFILE_STRTAB_NAME);
+ flags |= ArchiveMember::StringTableFlag;
+ } else {
+ if (error)
+ *error = "invalid string table name";
+ return 0;
+ }
+ } else if (Hdr->name[1] == ' ') {
+ if (0 == memcmp(Hdr->name, ARFILE_SVR4_SYMTAB_NAME, 16)) {
+ pathname.assign(ARFILE_SVR4_SYMTAB_NAME);
+ flags |= ArchiveMember::SVR4SymbolTableFlag;
+ } else {
+ if (error)
+ *error = "invalid SVR4 symbol table name";
+ return 0;
+ }
+ } else if (isdigit(Hdr->name[1])) {
+ unsigned index = atoi(&Hdr->name[1]);
+ if (index < strtab.length()) {
+ const char* namep = strtab.c_str() + index;
+ const char* endp = strtab.c_str() + strtab.length();
+ const char* p = namep;
+ const char* last_p = p;
+ while (p < endp) {
+ if (*p == '\n' && *last_p == '/') {
+ pathname.assign(namep, last_p - namep);
+ flags |= ArchiveMember::HasLongFilenameFlag;
+ break;
+ }
+ last_p = p;
+ p++;
+ }
+ if (p >= endp) {
+ if (error)
+ *error = "missing name termiantor in string table";
+ return 0;
+ }
+ } else {
+ if (error)
+ *error = "name index beyond string table";
+ return 0;
+ }
+ }
+ break;
+ case '_':
+ if (Hdr->name[1] == '_' &&
+ (0 == memcmp(Hdr->name, ARFILE_BSD4_SYMTAB_NAME, 16))) {
+ pathname.assign(ARFILE_BSD4_SYMTAB_NAME);
+ flags |= ArchiveMember::BSD4SymbolTableFlag;
+ break;
+ }
+ /* FALL THROUGH */
+
+ default:
+ char* slash = (char*) memchr(Hdr->name, '/', 16);
+ if (slash == 0)
+ slash = Hdr->name + 16;
+ pathname.assign(Hdr->name, slash - Hdr->name);
+ break;
+ }
+
+ // Determine if this is a bitcode file
+ switch (sys::IdentifyFileType(At, 4)) {
+ case sys::Bitcode_FileType:
+ flags |= ArchiveMember::BitcodeFlag;
+ break;
+ default:
+ flags &= ~ArchiveMember::BitcodeFlag;
+ break;
+ }
+
+ // Instantiate the ArchiveMember to be filled
+ ArchiveMember* member = new ArchiveMember(this);
+
+ // Fill in fields of the ArchiveMember
+ member->next = 0;
+ member->prev = 0;
+ member->parent = this;
+ member->path.set(pathname);
+ member->info.fileSize = MemberSize;
+ member->info.modTime.fromEpochTime(atoi(Hdr->date));
+ unsigned int mode;
+ sscanf(Hdr->mode, "%o", &mode);
+ member->info.mode = mode;
+ member->info.user = atoi(Hdr->uid);
+ member->info.group = atoi(Hdr->gid);
+ member->flags = flags;
+ member->data = At;
+
+ return member;
+}
+
+bool
+Archive::checkSignature(std::string* error) {
+ // Check the magic string at file's header
+ if (mapfile->size() < 8 || memcmp(base, ARFILE_MAGIC, 8)) {
+ if (error)
+ *error = "invalid signature for an archive file";
+ return false;
+ }
+ return true;
+}
+
+// This function loads the entire archive and fully populates its ilist with
+// the members of the archive file. This is typically used in preparation for
+// editing the contents of the archive.
+bool
+Archive::loadArchive(std::string* error) {
+
+ // Set up parsing
+ members.clear();
+ symTab.clear();
+ const char *At = base;
+ const char *End = base + mapfile->size();
+
+ if (!checkSignature(error))
+ return false;
+
+ At += 8; // Skip the magic string.
+
+ bool seenSymbolTable = false;
+ bool foundFirstFile = false;
+ while (At < End) {
+ // parse the member header
+ const char* Save = At;
+ ArchiveMember* mbr = parseMemberHeader(At, End, error);
+ if (!mbr)
+ return false;
+
+ // check if this is the foreign symbol table
+ if (mbr->isSVR4SymbolTable() || mbr->isBSD4SymbolTable()) {
+ // We just save this but don't do anything special
+ // with it. It doesn't count as the "first file".
+ if (foreignST) {
+ // What? Multiple foreign symbol tables? Just chuck it
+ // and retain the last one found.
+ delete foreignST;
+ }
+ foreignST = mbr;
+ At += mbr->getSize();
+ if ((intptr_t(At) & 1) == 1)
+ At++;
+ } else if (mbr->isStringTable()) {
+ // Simply suck the entire string table into a string
+ // variable. This will be used to get the names of the
+ // members that use the "/ddd" format for their names
+ // (SVR4 style long names).
+ strtab.assign(At, mbr->getSize());
+ At += mbr->getSize();
+ if ((intptr_t(At) & 1) == 1)
+ At++;
+ delete mbr;
+ } else if (mbr->isLLVMSymbolTable()) {
+ // This is the LLVM symbol table for the archive. If we've seen it
+ // already, its an error. Otherwise, parse the symbol table and move on.
+ if (seenSymbolTable) {
+ if (error)
+ *error = "invalid archive: multiple symbol tables";
+ return false;
+ }
+ if (!parseSymbolTable(mbr->getData(), mbr->getSize(), error))
+ return false;
+ seenSymbolTable = true;
+ At += mbr->getSize();
+ if ((intptr_t(At) & 1) == 1)
+ At++;
+ delete mbr; // We don't need this member in the list of members.
+ } else {
+ // This is just a regular file. If its the first one, save its offset.
+ // Otherwise just push it on the list and move on to the next file.
+ if (!foundFirstFile) {
+ firstFileOffset = Save - base;
+ foundFirstFile = true;
+ }
+ members.push_back(mbr);
+ At += mbr->getSize();
+ if ((intptr_t(At) & 1) == 1)
+ At++;
+ }
+ }
+ return true;
+}
+
+// Open and completely load the archive file.
+Archive*
+Archive::OpenAndLoad(const sys::Path& file, std::string* ErrorMessage)
+{
+ std::auto_ptr<Archive> result ( new Archive(file));
+ if (result->mapToMemory(ErrorMessage))
+ return 0;
+ if (!result->loadArchive(ErrorMessage))
+ return 0;
+ return result.release();
+}
+
+// Get all the bitcode modules from the archive
+bool
+Archive::getAllModules(std::vector<Module*>& Modules, std::string* ErrMessage) {
+
+ for (iterator I=begin(), E=end(); I != E; ++I) {
+ if (I->isBitcode()) {
+ std::string FullMemberName = archPath.toString() +
+ "(" + I->getPath().toString() + ")";
+ MemoryBuffer *Buffer =
+ MemoryBuffer::getNewMemBuffer(I->getSize(), FullMemberName.c_str());
+ memcpy((char*)Buffer->getBufferStart(), I->getData(), I->getSize());
+
+ Module *M = ParseBitcodeFile(Buffer, ErrMessage);
+ delete Buffer;
+ if (!M)
+ return true;
+
+ Modules.push_back(M);
+ }
+ }
+ return false;
+}
+
+// Load just the symbol table from the archive file
+bool
+Archive::loadSymbolTable(std::string* ErrorMsg) {
+
+ // Set up parsing
+ members.clear();
+ symTab.clear();
+ const char *At = base;
+ const char *End = base + mapfile->size();
+
+ // Make sure we're dealing with an archive
+ if (!checkSignature(ErrorMsg))
+ return false;
+
+ At += 8; // Skip signature
+
+ // Parse the first file member header
+ const char* FirstFile = At;
+ ArchiveMember* mbr = parseMemberHeader(At, End, ErrorMsg);
+ if (!mbr)
+ return false;
+
+ if (mbr->isSVR4SymbolTable() || mbr->isBSD4SymbolTable()) {
+ // Skip the foreign symbol table, we don't do anything with it
+ At += mbr->getSize();
+ if ((intptr_t(At) & 1) == 1)
+ At++;
+ delete mbr;
+
+ // Read the next one
+ FirstFile = At;
+ mbr = parseMemberHeader(At, End, ErrorMsg);
+ if (!mbr) {
+ delete mbr;
+ return false;
+ }
+ }
+
+ if (mbr->isStringTable()) {
+ // Process the string table entry
+ strtab.assign((const char*)mbr->getData(), mbr->getSize());
+ At += mbr->getSize();
+ if ((intptr_t(At) & 1) == 1)
+ At++;
+ delete mbr;
+ // Get the next one
+ FirstFile = At;
+ mbr = parseMemberHeader(At, End, ErrorMsg);
+ if (!mbr) {
+ delete mbr;
+ return false;
+ }
+ }
+
+ // See if its the symbol table
+ if (mbr->isLLVMSymbolTable()) {
+ if (!parseSymbolTable(mbr->getData(), mbr->getSize(), ErrorMsg)) {
+ delete mbr;
+ return false;
+ }
+
+ At += mbr->getSize();
+ if ((intptr_t(At) & 1) == 1)
+ At++;
+ delete mbr;
+ // Can't be any more symtab headers so just advance
+ FirstFile = At;
+ } else {
+ // There's no symbol table in the file. We have to rebuild it from scratch
+ // because the intent of this method is to get the symbol table loaded so
+ // it can be searched efficiently.
+ // Add the member to the members list
+ members.push_back(mbr);
+ }
+
+ firstFileOffset = FirstFile - base;
+ return true;
+}
+
+// Open the archive and load just the symbol tables
+Archive*
+Archive::OpenAndLoadSymbols(const sys::Path& file, std::string* ErrorMessage) {
+ std::auto_ptr<Archive> result ( new Archive(file) );
+ if (result->mapToMemory(ErrorMessage))
+ return 0;
+ if (!result->loadSymbolTable(ErrorMessage))
+ return 0;
+ return result.release();
+}
+
+// Look up one symbol in the symbol table and return a ModuleProvider for the
+// module that defines that symbol.
+ModuleProvider*
+Archive::findModuleDefiningSymbol(const std::string& symbol,
+ std::string* ErrMsg) {
+ SymTabType::iterator SI = symTab.find(symbol);
+ if (SI == symTab.end())
+ return 0;
+
+ // The symbol table was previously constructed assuming that the members were
+ // written without the symbol table header. Because VBR encoding is used, the
+ // values could not be adjusted to account for the offset of the symbol table
+ // because that could affect the size of the symbol table due to VBR encoding.
+ // We now have to account for this by adjusting the offset by the size of the
+ // symbol table and its header.
+ unsigned fileOffset =
+ SI->second + // offset in symbol-table-less file
+ firstFileOffset; // add offset to first "real" file in archive
+
+ // See if the module is already loaded
+ ModuleMap::iterator MI = modules.find(fileOffset);
+ if (MI != modules.end())
+ return MI->second.first;
+
+ // Module hasn't been loaded yet, we need to load it
+ const char* modptr = base + fileOffset;
+ ArchiveMember* mbr = parseMemberHeader(modptr, base + mapfile->size(),ErrMsg);
+ if (!mbr)
+ return 0;
+
+ // Now, load the bitcode module to get the ModuleProvider
+ std::string FullMemberName = archPath.toString() + "(" +
+ mbr->getPath().toString() + ")";
+ MemoryBuffer *Buffer =MemoryBuffer::getNewMemBuffer(mbr->getSize(),
+ FullMemberName.c_str());
+ memcpy((char*)Buffer->getBufferStart(), mbr->getData(), mbr->getSize());
+
+ ModuleProvider *mp = getBitcodeModuleProvider(Buffer, ErrMsg);
+ if (!mp)
+ return 0;
+
+ modules.insert(std::make_pair(fileOffset, std::make_pair(mp, mbr)));
+
+ return mp;
+}
+
+// Look up multiple symbols in the symbol table and return a set of
+// ModuleProviders that define those symbols.
+bool
+Archive::findModulesDefiningSymbols(std::set<std::string>& symbols,
+ std::set<ModuleProvider*>& result,
+ std::string* error) {
+ if (!mapfile || !base) {
+ if (error)
+ *error = "Empty archive invalid for finding modules defining symbols";
+ return false;
+ }
+
+ 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, error);
+ if (!mbr)
+ return false;
+
+ // If it contains symbols
+ if (mbr->isBitcode()) {
+ // Get the symbols
+ std::vector<std::string> symbols;
+ std::string FullMemberName = archPath.toString() + "(" +
+ mbr->getPath().toString() + ")";
+ ModuleProvider* MP =
+ GetBitcodeSymbols((const unsigned char*)At, mbr->getSize(),
+ FullMemberName, symbols, error);
+
+ 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 {
+ if (error)
+ *error = "Can't parse bitcode member: " +
+ mbr->getPath().toString() + ": " + *error;
+ delete mbr;
+ return false;
+ }
+ }
+
+ // Go to the next file location
+ At += mbr->getSize();
+ if ((intptr_t(At) & 1) == 1)
+ At++;
+ }
+ }
+
+ // 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>::iterator I=symbols.begin(),
+ E=symbols.end(); I != E;) {
+ // See if this symbol exists
+ ModuleProvider* mp = findModuleDefiningSymbol(*I,error);
+ if (mp) {
+ // The symbol exists, insert the ModuleProvider into our result,
+ // duplicates wil be ignored
+ result.insert(mp);
+
+ // Remove the symbol now that its been resolved, being careful to
+ // post-increment the iterator.
+ symbols.erase(I++);
+ } else {
+ ++I;
+ }
+ }
+ return true;
+}
+
+bool Archive::isBitcodeArchive() {
+ // Make sure the symTab has been loaded. In most cases this should have been
+ // done when the archive was constructed, but still, this is just in case.
+ if (!symTab.size())
+ if (!loadSymbolTable(0))
+ return false;
+
+ // Now that we know it's been loaded, return true
+ // if it has a size
+ if (symTab.size()) return true;
+
+ // We still can't be sure it isn't a bitcode archive
+ if (!loadArchive(0))
+ return false;
+
+ std::vector<Module *> Modules;
+ std::string ErrorMessage;
+
+ // Scan the archive, trying to load a bitcode member. We only load one to
+ // see if this works.
+ for (iterator I = begin(), E = end(); I != E; ++I) {
+ if (!I->isBitcode())
+ continue;
+
+ std::string FullMemberName =
+ archPath.toString() + "(" + I->getPath().toString() + ")";
+
+ MemoryBuffer *Buffer =
+ MemoryBuffer::getNewMemBuffer(I->getSize(), FullMemberName.c_str());
+ memcpy((char*)Buffer->getBufferStart(), I->getData(), I->getSize());
+ Module *M = ParseBitcodeFile(Buffer);
+ delete Buffer;
+ if (!M)
+ return false; // Couldn't parse bitcode, not a bitcode archive.
+ delete M;
+ return true;
+ }
+
+ return false;
+}
diff --git a/lib/Archive/ArchiveWriter.cpp b/lib/Archive/ArchiveWriter.cpp
new file mode 100644
index 0000000..ee55201
--- /dev/null
+++ b/lib/Archive/ArchiveWriter.cpp
@@ -0,0 +1,477 @@
+//===-- ArchiveWriter.cpp - Write LLVM archive files ----------------------===//
+//
+// 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.
+//
+//===----------------------------------------------------------------------===//
+//
+// Builds up an LLVM archive file (.a) containing LLVM bitcode.
+//
+//===----------------------------------------------------------------------===//
+
+#include "ArchiveInternals.h"
+#include "llvm/Bitcode/ReaderWriter.h"
+#include "llvm/System/Signals.h"
+#include "llvm/System/Process.h"
+#include "llvm/ModuleProvider.h"
+#include <fstream>
+#include <ostream>
+#include <iomanip>
+using namespace llvm;
+
+// Write an integer using variable bit rate encoding. This saves a few bytes
+// per entry in the symbol table.
+inline void writeInteger(unsigned num, std::ofstream& ARFile) {
+ while (1) {
+ if (num < 0x80) { // done?
+ ARFile << (unsigned char)num;
+ return;
+ }
+
+ // Nope, we are bigger than a character, output the next 7 bits and set the
+ // high bit to say that there is more coming...
+ ARFile << (unsigned char)(0x80 | ((unsigned char)num & 0x7F));
+ num >>= 7; // Shift out 7 bits now...
+ }
+}
+
+// Compute how many bytes are taken by a given VBR encoded value. This is needed
+// to pre-compute the size of the symbol table.
+inline unsigned numVbrBytes(unsigned num) {
+
+ // Note that the following nested ifs are somewhat equivalent to a binary
+ // search. We split it in half by comparing against 2^14 first. This allows
+ // most reasonable values to be done in 2 comparisons instead of 1 for
+ // small ones and four for large ones. We expect this to access file offsets
+ // in the 2^10 to 2^24 range and symbol lengths in the 2^0 to 2^8 range,
+ // so this approach is reasonable.
+ if (num < 1<<14)
+ if (num < 1<<7)
+ return 1;
+ else
+ return 2;
+ if (num < 1<<21)
+ return 3;
+
+ if (num < 1<<28)
+ return 4;
+ return 5; // anything >= 2^28 takes 5 bytes
+}
+
+// Create an empty archive.
+Archive*
+Archive::CreateEmpty(const sys::Path& FilePath ) {
+ Archive* result = new Archive(FilePath);
+ return result;
+}
+
+// Fill the ArchiveMemberHeader with the information from a member. If
+// TruncateNames is true, names are flattened to 15 chars or less. The sz field
+// is provided here instead of coming from the mbr because the member might be
+// stored compressed and the compressed size is not the ArchiveMember's size.
+// Furthermore compressed files have negative size fields to identify them as
+// compressed.
+bool
+Archive::fillHeader(const ArchiveMember &mbr, ArchiveMemberHeader& hdr,
+ int sz, bool TruncateNames) const {
+
+ // Set the permissions mode, uid and gid
+ hdr.init();
+ char buffer[32];
+ sprintf(buffer, "%-8o", mbr.getMode());
+ memcpy(hdr.mode,buffer,8);
+ sprintf(buffer, "%-6u", mbr.getUser());
+ memcpy(hdr.uid,buffer,6);
+ sprintf(buffer, "%-6u", mbr.getGroup());
+ memcpy(hdr.gid,buffer,6);
+
+ // Set the last modification date
+ uint64_t secondsSinceEpoch = mbr.getModTime().toEpochTime();
+ sprintf(buffer,"%-12u", unsigned(secondsSinceEpoch));
+ memcpy(hdr.date,buffer,12);
+
+ // Get rid of trailing blanks in the name
+ std::string mbrPath = mbr.getPath().toString();
+ size_t mbrLen = mbrPath.length();
+ while (mbrLen > 0 && mbrPath[mbrLen-1] == ' ') {
+ mbrPath.erase(mbrLen-1,1);
+ mbrLen--;
+ }
+
+ // Set the name field in one of its various flavors.
+ bool writeLongName = false;
+ if (mbr.isStringTable()) {
+ memcpy(hdr.name,ARFILE_STRTAB_NAME,16);
+ } else if (mbr.isSVR4SymbolTable()) {
+ memcpy(hdr.name,ARFILE_SVR4_SYMTAB_NAME,16);
+ } else if (mbr.isBSD4SymbolTable()) {
+ memcpy(hdr.name,ARFILE_BSD4_SYMTAB_NAME,16);
+ } else if (mbr.isLLVMSymbolTable()) {
+ memcpy(hdr.name,ARFILE_LLVM_SYMTAB_NAME,16);
+ } else if (TruncateNames) {
+ const char* nm = mbrPath.c_str();
+ unsigned len = mbrPath.length();
+ size_t slashpos = mbrPath.rfind('/');
+ if (slashpos != std::string::npos) {
+ nm += slashpos + 1;
+ len -= slashpos +1;
+ }
+ if (len > 15)
+ len = 15;
+ memcpy(hdr.name,nm,len);
+ hdr.name[len] = '/';
+ } else if (mbrPath.length() < 16 && mbrPath.find('/') == std::string::npos) {
+ memcpy(hdr.name,mbrPath.c_str(),mbrPath.length());
+ hdr.name[mbrPath.length()] = '/';
+ } else {
+ std::string nm = "#1/";
+ nm += utostr(mbrPath.length());
+ memcpy(hdr.name,nm.data(),nm.length());
+ if (sz < 0)
+ sz -= mbrPath.length();
+ else
+ sz += mbrPath.length();
+ writeLongName = true;
+ }
+
+ // Set the size field
+ if (sz < 0) {
+ buffer[0] = '-';
+ sprintf(&buffer[1],"%-9u",(unsigned)-sz);
+ } else {
+ sprintf(buffer, "%-10u", (unsigned)sz);
+ }
+ memcpy(hdr.size,buffer,10);
+
+ return writeLongName;
+}
+
+// Insert a file into the archive before some other member. This also takes care
+// of extracting the necessary flags and information from the file.
+bool
+Archive::addFileBefore(const sys::Path& filePath, iterator where,
+ std::string* ErrMsg) {
+ if (!filePath.exists()) {
+ if (ErrMsg)
+ *ErrMsg = "Can not add a non-existent file to archive";
+ return true;
+ }
+
+ ArchiveMember* mbr = new ArchiveMember(this);
+
+ mbr->data = 0;
+ mbr->path = filePath;
+ const sys::FileStatus *FSInfo = mbr->path.getFileStatus(false, ErrMsg);
+ if (FSInfo)
+ mbr->info = *FSInfo;
+ else
+ return true;
+
+ unsigned flags = 0;
+ bool hasSlash = filePath.toString().find('/') != std::string::npos;
+ if (hasSlash)
+ flags |= ArchiveMember::HasPathFlag;
+ if (hasSlash || filePath.toString().length() > 15)
+ flags |= ArchiveMember::HasLongFilenameFlag;
+ std::string magic;
+ mbr->path.getMagicNumber(magic,4);
+ switch (sys::IdentifyFileType(magic.c_str(),4)) {
+ case sys::Bitcode_FileType:
+ flags |= ArchiveMember::BitcodeFlag;
+ break;
+ default:
+ break;
+ }
+ mbr->flags = flags;
+ members.insert(where,mbr);
+ return false;
+}
+
+// Write one member out to the file.
+bool
+Archive::writeMember(
+ const ArchiveMember& member,
+ std::ofstream& ARFile,
+ bool CreateSymbolTable,
+ bool TruncateNames,
+ bool ShouldCompress,
+ std::string* ErrMsg
+) {
+
+ unsigned filepos = ARFile.tellp();
+ filepos -= 8;
+
+ // Get the data and its size either from the
+ // member's in-memory data or directly from the file.
+ size_t fSize = member.getSize();
+ const char* data = (const char*)member.getData();
+ sys::MappedFile* mFile = 0;
+ if (!data) {
+ mFile = new sys::MappedFile();
+ if (mFile->open(member.getPath(), sys::MappedFile::READ_ACCESS, ErrMsg))
+ return true;
+ if (!(data = (const char*) mFile->map(ErrMsg)))
+ return true;
+ fSize = mFile->size();
+ }
+
+ // Now that we have the data in memory, update the
+ // symbol table if its a bitcode file.
+ if (CreateSymbolTable && member.isBitcode()) {
+ std::vector<std::string> symbols;
+ std::string FullMemberName = archPath.toString() + "(" +
+ member.getPath().toString()
+ + ")";
+ ModuleProvider* MP =
+ GetBitcodeSymbols((const unsigned char*)data,fSize,
+ FullMemberName, symbols, ErrMsg);
+
+ // If the bitcode parsed successfully
+ if ( MP ) {
+ for (std::vector<std::string>::iterator SI = symbols.begin(),
+ SE = symbols.end(); SI != SE; ++SI) {
+
+ std::pair<SymTabType::iterator,bool> Res =
+ symTab.insert(std::make_pair(*SI,filepos));
+
+ if (Res.second) {
+ symTabSize += SI->length() +
+ numVbrBytes(SI->length()) +
+ numVbrBytes(filepos);
+ }
+ }
+ // We don't need this module any more.
+ delete MP;
+ } else {
+ if (mFile != 0) {
+ mFile->close();
+ delete mFile;
+ }
+ if (ErrMsg)
+ *ErrMsg = "Can't parse bitcode member: " + member.getPath().toString()
+ + ": " + *ErrMsg;
+ return true;
+ }
+ }
+
+ int hdrSize = fSize;
+
+ // Compute the fields of the header
+ ArchiveMemberHeader Hdr;
+ bool writeLongName = fillHeader(member,Hdr,hdrSize,TruncateNames);
+
+ // Write header to archive file
+ ARFile.write((char*)&Hdr, sizeof(Hdr));
+
+ // Write the long filename if its long
+ if (writeLongName) {
+ ARFile.write(member.getPath().toString().data(),
+ member.getPath().toString().length());
+ }
+
+ // Write the (possibly compressed) member's content to the file.
+ ARFile.write(data,fSize);
+
+ // Make sure the member is an even length
+ if ((ARFile.tellp() & 1) == 1)
+ ARFile << ARFILE_PAD;
+
+ // Close the mapped file if it was opened
+ if (mFile != 0) {
+ mFile->close();
+ delete mFile;
+ }
+ return false;
+}
+
+// Write out the LLVM symbol table as an archive member to the file.
+void
+Archive::writeSymbolTable(std::ofstream& ARFile) {
+
+ // Construct the symbol table's header
+ ArchiveMemberHeader Hdr;
+ Hdr.init();
+ memcpy(Hdr.name,ARFILE_LLVM_SYMTAB_NAME,16);
+ uint64_t secondsSinceEpoch = sys::TimeValue::now().toEpochTime();
+ char buffer[32];
+ sprintf(buffer, "%-8o", 0644);
+ memcpy(Hdr.mode,buffer,8);
+ sprintf(buffer, "%-6u", sys::Process::GetCurrentUserId());
+ memcpy(Hdr.uid,buffer,6);
+ sprintf(buffer, "%-6u", sys::Process::GetCurrentGroupId());
+ memcpy(Hdr.gid,buffer,6);
+ sprintf(buffer,"%-12u", unsigned(secondsSinceEpoch));
+ memcpy(Hdr.date,buffer,12);
+ sprintf(buffer,"%-10u",symTabSize);
+ memcpy(Hdr.size,buffer,10);
+
+ // Write the header
+ ARFile.write((char*)&Hdr, sizeof(Hdr));
+
+ // Save the starting position of the symbol tables data content.
+ unsigned startpos = ARFile.tellp();
+
+ // Write out the symbols sequentially
+ for ( Archive::SymTabType::iterator I = symTab.begin(), E = symTab.end();
+ I != E; ++I)
+ {
+ // Write out the file index
+ writeInteger(I->second, ARFile);
+ // Write out the length of the symbol
+ writeInteger(I->first.length(), ARFile);
+ // Write out the symbol
+ ARFile.write(I->first.data(), I->first.length());
+ }
+
+ // Now that we're done with the symbol table, get the ending file position
+ unsigned endpos = ARFile.tellp();
+
+ // Make sure that the amount we wrote is what we pre-computed. This is
+ // critical for file integrity purposes.
+ assert(endpos - startpos == symTabSize && "Invalid symTabSize computation");
+
+ // Make sure the symbol table is even sized
+ if (symTabSize % 2 != 0 )
+ ARFile << ARFILE_PAD;
+}
+
+// Write the entire archive to the file specified when the archive was created.
+// This writes to a temporary file first. Options are for creating a symbol
+// table, flattening the file names (no directories, 15 chars max) and
+// compressing each archive member.
+bool
+Archive::writeToDisk(bool CreateSymbolTable, bool TruncateNames, bool Compress,
+ std::string* ErrMsg)
+{
+ // Make sure they haven't opened up the file, not loaded it,
+ // but are now trying to write it which would wipe out the file.
+ if (members.empty() && mapfile->size() > 8) {
+ if (ErrMsg)
+ *ErrMsg = "Can't write an archive not opened for writing";
+ return true;
+ }
+
+ // Create a temporary file to store the archive in
+ sys::Path TmpArchive = archPath;
+ if (TmpArchive.createTemporaryFileOnDisk(ErrMsg))
+ return true;
+
+ // Make sure the temporary gets removed if we crash
+ sys::RemoveFileOnSignal(TmpArchive);
+
+ // Create archive file for output.
+ std::ios::openmode io_mode = std::ios::out | std::ios::trunc |
+ std::ios::binary;
+ std::ofstream ArchiveFile(TmpArchive.c_str(), io_mode);
+
+ // Check for errors opening or creating archive file.
+ if (!ArchiveFile.is_open() || ArchiveFile.bad()) {
+ if (TmpArchive.exists())
+ TmpArchive.eraseFromDisk();
+ if (ErrMsg)
+ *ErrMsg = "Error opening archive file: " + archPath.toString();
+ return true;
+ }
+
+ // If we're creating a symbol table, reset it now
+ if (CreateSymbolTable) {
+ symTabSize = 0;
+ symTab.clear();
+ }
+
+ // Write magic string to archive.
+ ArchiveFile << ARFILE_MAGIC;
+
+ // Loop over all member files, and write them out. Note that this also
+ // builds the symbol table, symTab.
+ for (MembersList::iterator I = begin(), E = end(); I != E; ++I) {
+ if (writeMember(*I, ArchiveFile, CreateSymbolTable,
+ TruncateNames, Compress, ErrMsg)) {
+ if (TmpArchive.exists())
+ TmpArchive.eraseFromDisk();
+ ArchiveFile.close();
+ return true;
+ }
+ }
+
+ // Close archive file.
+ ArchiveFile.close();
+
+ // Write the symbol table
+ if (CreateSymbolTable) {
+ // At this point we have written a file that is a legal archive but it
+ // doesn't have a symbol table in it. To aid in faster reading and to
+ // ensure compatibility with other archivers we need to put the symbol
+ // table first in the file. Unfortunately, this means mapping the file
+ // we just wrote back in and copying it to the destination file.
+
+ // Map in the archive we just wrote.
+ sys::MappedFile arch;
+ if (arch.open(TmpArchive, sys::MappedFile::READ_ACCESS, ErrMsg))
+ return true;
+ const char* base;
+ if (!(base = (const char*) arch.map(ErrMsg)))
+ return true;
+
+ // Open another temporary file in order to avoid invalidating the
+ // mmapped data
+ sys::Path FinalFilePath = archPath;
+ if (FinalFilePath.createTemporaryFileOnDisk(ErrMsg))
+ return true;
+ sys::RemoveFileOnSignal(FinalFilePath);
+
+ std::ofstream FinalFile(FinalFilePath.c_str(), io_mode);
+ if (!FinalFile.is_open() || FinalFile.bad()) {
+ if (TmpArchive.exists())
+ TmpArchive.eraseFromDisk();
+ if (ErrMsg)
+ *ErrMsg = "Error opening archive file: " + FinalFilePath.toString();
+ return true;
+ }
+
+ // Write the file magic number
+ FinalFile << ARFILE_MAGIC;
+
+ // If there is a foreign symbol table, put it into the file now. Most
+ // ar(1) implementations require the symbol table to be first but llvm-ar
+ // can deal with it being after a foreign symbol table. This ensures
+ // compatibility with other ar(1) implementations as well as allowing the
+ // archive to store both native .o and LLVM .bc files, both indexed.
+ if (foreignST) {
+ if (writeMember(*foreignST, FinalFile, false, false, false, ErrMsg)) {
+ FinalFile.close();
+ if (TmpArchive.exists())
+ TmpArchive.eraseFromDisk();
+ return true;
+ }
+ }
+
+ // Put out the LLVM symbol table now.
+ writeSymbolTable(FinalFile);
+
+ // Copy the temporary file contents being sure to skip the file's magic
+ // number.
+ FinalFile.write(base + sizeof(ARFILE_MAGIC)-1,
+ arch.size()-sizeof(ARFILE_MAGIC)+1);
+
+ // Close up shop
+ FinalFile.close();
+ arch.close();
+
+ // Move the final file over top of TmpArchive
+ if (FinalFilePath.renamePathOnDisk(TmpArchive, ErrMsg))
+ return true;
+ }
+
+ // Before we replace the actual archive, we need to forget all the
+ // members, since they point to data in that old archive. We need to do
+ // this because we cannot replace an open file on Windows.
+ cleanUpMemory();
+
+ if (TmpArchive.renamePathOnDisk(archPath, ErrMsg))
+ return true;
+
+ return false;
+}
diff --git a/lib/Archive/Makefile b/lib/Archive/Makefile
new file mode 100644
index 0000000..917cb91
--- /dev/null
+++ b/lib/Archive/Makefile
@@ -0,0 +1,17 @@
+##===- lib/Archive/Makefile --------------------------------*- Makefile -*-===##
+#
+# 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.
+#
+##===----------------------------------------------------------------------===##
+
+LEVEL = ../..
+LIBRARYNAME = LLVMArchive
+
+# We only want an archive so only those modules actually used by a tool are
+# included.
+BUILD_ARCHIVE := 1
+
+include $(LEVEL)/Makefile.common