#include "llvm/ADT/Twine.h"
#include "llvm/Support/Endian.h"
#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/Path.h"
using namespace llvm;
using namespace object;
+using namespace llvm::support::endian;
static const char *const Magic = "!<arch>\n";
static const char *const ThinMagic = "!<thin>\n";
return llvm::StringRef(Name, end);
}
-uint32_t ArchiveMemberHeader::getSize() const {
+ErrorOr<uint32_t> ArchiveMemberHeader::getSize() const {
uint32_t Ret;
if (llvm::StringRef(Size, sizeof(Size)).rtrim(" ").getAsInteger(10, Ret))
- llvm_unreachable("Size is not a decimal number.");
+ return object_error::parse_failed; // Size is not a decimal number.
return Ret;
}
return Ret;
}
-Archive::Child::Child(const Archive *Parent, const char *Start)
+Archive::Child::Child(const Archive *Parent, StringRef Data,
+ uint16_t StartOfFile)
+ : Parent(Parent), Data(Data), StartOfFile(StartOfFile) {}
+
+Archive::Child::Child(const Archive *Parent, const char *Start,
+ std::error_code *EC)
: Parent(Parent) {
if (!Start)
return;
- const ArchiveMemberHeader *Header =
- reinterpret_cast<const ArchiveMemberHeader *>(Start);
uint64_t Size = sizeof(ArchiveMemberHeader);
- if (!Parent->IsThin || Header->getName() == "/" || Header->getName() == "//")
- Size += Header->getSize();
Data = StringRef(Start, Size);
+ if (!isThinMember()) {
+ ErrorOr<uint64_t> MemberSize = getRawSize();
+ if ((*EC = MemberSize.getError()))
+ return;
+ Size += MemberSize.get();
+ Data = StringRef(Start, Size);
+ }
// Setup StartOfFile and PaddingBytes.
StartOfFile = sizeof(ArchiveMemberHeader);
// Don't include attached name.
- StringRef Name = Header->getName();
+ StringRef Name = getRawName();
if (Name.startswith("#1/")) {
uint64_t NameSize;
if (Name.substr(3).rtrim(" ").getAsInteger(10, NameSize))
}
}
-uint64_t Archive::Child::getSize() const {
- if (Parent->IsThin)
- return getHeader()->getSize();
+ErrorOr<uint64_t> Archive::Child::getSize() const {
+ if (Parent->IsThin) {
+ ErrorOr<uint32_t> Size = getHeader()->getSize();
+ if (std::error_code EC = Size.getError())
+ return EC;
+ return Size.get();
+ }
return Data.size() - StartOfFile;
}
-uint64_t Archive::Child::getRawSize() const {
- return getHeader()->getSize();
+ErrorOr<uint64_t> Archive::Child::getRawSize() const {
+ ErrorOr<uint32_t> Size = getHeader()->getSize();
+ if (std::error_code EC = Size.getError())
+ return EC;
+ return Size.get();
+}
+
+bool Archive::Child::isThinMember() const {
+ StringRef Name = getHeader()->getName();
+ return Parent->IsThin && Name != "/" && Name != "//";
}
-Archive::Child Archive::Child::getNext() const {
+ErrorOr<StringRef> Archive::Child::getBuffer() const {
+ if (!isThinMember()) {
+ ErrorOr<uint32_t> Size = getSize();
+ if (std::error_code EC = Size.getError())
+ return EC;
+ return StringRef(Data.data() + StartOfFile, Size.get());
+ }
+ ErrorOr<StringRef> Name = getName();
+ if (std::error_code EC = Name.getError())
+ return EC;
+ SmallString<128> FullName = sys::path::parent_path(
+ Parent->getMemoryBufferRef().getBufferIdentifier());
+ sys::path::append(FullName, *Name);
+ ErrorOr<std::unique_ptr<MemoryBuffer>> Buf = MemoryBuffer::getFile(FullName);
+ if (std::error_code EC = Buf.getError())
+ return EC;
+ Parent->ThinBuffers.push_back(std::move(*Buf));
+ return Parent->ThinBuffers.back()->getBuffer();
+}
+
+ErrorOr<Archive::Child> Archive::Child::getNext() const {
size_t SpaceToSkip = Data.size();
// If it's odd, add 1 to make it even.
if (SpaceToSkip & 1)
const char *NextLoc = Data.data() + SpaceToSkip;
+ // Check to see if this is at the end of the archive.
+ if (NextLoc == Parent->Data.getBufferEnd())
+ return Child(Parent, nullptr, nullptr);
+
// Check to see if this is past the end of the archive.
- if (NextLoc >= Parent->Data.getBufferEnd())
- return Child(Parent, nullptr);
+ if (NextLoc > Parent->Data.getBufferEnd())
+ return object_error::parse_failed;
- return Child(Parent, NextLoc);
+ std::error_code EC;
+ Child Ret(Parent, NextLoc, &EC);
+ if (EC)
+ return EC;
+ return Ret;
}
uint64_t Archive::Child::getChildOffset() const {
std::size_t offset;
if (name.substr(1).rtrim(" ").getAsInteger(10, offset))
llvm_unreachable("Long name offset is not an integer");
- const char *addr = Parent->StringTable->Data.begin()
- + sizeof(ArchiveMemberHeader)
- + offset;
+
// Verify it.
- if (Parent->StringTable == Parent->child_end()
- || addr < (Parent->StringTable->Data.begin()
- + sizeof(ArchiveMemberHeader))
- || addr > (Parent->StringTable->Data.begin()
- + sizeof(ArchiveMemberHeader)
- + Parent->StringTable->getSize()))
+ if (offset >= Parent->StringTable.size())
return object_error::parse_failed;
+ const char *addr = Parent->StringTable.begin() + offset;
- // GNU long file names end with a /.
- if (Parent->kind() == K_GNU) {
- StringRef::size_type End = StringRef(addr).find('/');
- return StringRef(addr, End);
+ // GNU long file names end with a "/\n".
+ if (Parent->kind() == K_GNU || Parent->kind() == K_MIPS64) {
+ StringRef::size_type End = StringRef(addr).find('\n');
+ return StringRef(addr, End - 1);
}
return StringRef(addr);
} else if (name.startswith("#1/")) {
if (std::error_code EC = NameOrErr.getError())
return EC;
StringRef Name = NameOrErr.get();
- return MemoryBufferRef(getBuffer(), Name);
+ ErrorOr<StringRef> Buf = getBuffer();
+ if (std::error_code EC = Buf.getError())
+ return EC;
+ return MemoryBufferRef(*Buf, Name);
}
ErrorOr<std::unique_ptr<Binary>>
return std::move(Ret);
}
+void Archive::setFirstRegular(const Child &C) {
+ FirstRegularData = C.Data;
+ FirstRegularStartOfFile = C.StartOfFile;
+}
+
Archive::Archive(MemoryBufferRef Source, std::error_code &ec)
- : Binary(Binary::ID_Archive, Source), SymbolTable(child_end()) {
+ : Binary(Binary::ID_Archive, Source) {
StringRef Buffer = Data.getBuffer();
// Check for sufficient magic.
if (Buffer.startswith(ThinMagic)) {
}
// Get the special members.
- child_iterator i = child_begin(false);
- child_iterator e = child_end();
+ child_iterator I = child_begin(false);
+ if ((ec = I->getError()))
+ return;
+ child_iterator E = child_end();
- if (i == e) {
- ec = object_error::success;
+ if (I == E) {
+ ec = std::error_code();
return;
}
+ const Child *C = &**I;
- StringRef Name = i->getRawName();
+ auto Increment = [&]() {
+ ++I;
+ if ((ec = I->getError()))
+ return true;
+ C = &**I;
+ return false;
+ };
+
+ StringRef Name = C->getRawName();
// Below is the pattern that is used to figure out the archive format
// GNU archive format
if (Name == "__.SYMDEF") {
Format = K_BSD;
- SymbolTable = i;
- ++i;
- FirstRegular = i;
- ec = object_error::success;
+ // We know that the symbol table is not an external file, so we just assert
+ // there is no error.
+ SymbolTable = *C->getBuffer();
+ if (Increment())
+ return;
+ setFirstRegular(*C);
+
+ ec = std::error_code();
return;
}
if (Name.startswith("#1/")) {
Format = K_BSD;
// We know this is BSD, so getName will work since there is no string table.
- ErrorOr<StringRef> NameOrErr = i->getName();
+ ErrorOr<StringRef> NameOrErr = C->getName();
ec = NameOrErr.getError();
if (ec)
return;
Name = NameOrErr.get();
if (Name == "__.SYMDEF SORTED" || Name == "__.SYMDEF") {
- SymbolTable = i;
- ++i;
+ // We know that the symbol table is not an external file, so we just
+ // assert there is no error.
+ SymbolTable = *C->getBuffer();
+ if (Increment())
+ return;
}
- FirstRegular = i;
+ setFirstRegular(*C);
return;
}
- if (Name == "/") {
- SymbolTable = i;
+ // MIPS 64-bit ELF archives use a special format of a symbol table.
+ // This format is marked by `ar_name` field equals to "/SYM64/".
+ // For detailed description see page 96 in the following document:
+ // http://techpubs.sgi.com/library/manuals/4000/007-4658-001/pdf/007-4658-001.pdf
- ++i;
- if (i == e) {
- ec = object_error::parse_failed;
+ bool has64SymTable = false;
+ if (Name == "/" || Name == "/SYM64/") {
+ // We know that the symbol table is not an external file, so we just assert
+ // there is no error.
+ SymbolTable = *C->getBuffer();
+ if (Name == "/SYM64/")
+ has64SymTable = true;
+
+ if (Increment())
+ return;
+ if (I == E) {
+ ec = std::error_code();
return;
}
- Name = i->getRawName();
+ Name = C->getRawName();
}
if (Name == "//") {
- Format = K_GNU;
- StringTable = i;
- ++i;
- FirstRegular = i;
- ec = object_error::success;
+ Format = has64SymTable ? K_MIPS64 : K_GNU;
+ // The string table is never an external member, so we just assert on the
+ // ErrorOr.
+ StringTable = *C->getBuffer();
+ if (Increment())
+ return;
+ setFirstRegular(*C);
+ ec = std::error_code();
return;
}
if (Name[0] != '/') {
- Format = K_GNU;
- FirstRegular = i;
- ec = object_error::success;
+ Format = has64SymTable ? K_MIPS64 : K_GNU;
+ setFirstRegular(*C);
+ ec = std::error_code();
return;
}
}
Format = K_COFF;
- SymbolTable = i;
+ // We know that the symbol table is not an external file, so we just assert
+ // there is no error.
+ SymbolTable = *C->getBuffer();
- ++i;
- if (i == e) {
- FirstRegular = i;
- ec = object_error::success;
+ if (Increment())
+ return;
+
+ if (I == E) {
+ setFirstRegular(*C);
+ ec = std::error_code();
return;
}
- Name = i->getRawName();
+ Name = C->getRawName();
if (Name == "//") {
- StringTable = i;
- ++i;
+ // The string table is never an external member, so we just assert on the
+ // ErrorOr.
+ StringTable = *C->getBuffer();
+ if (Increment())
+ return;
}
- FirstRegular = i;
- ec = object_error::success;
+ setFirstRegular(*C);
+ ec = std::error_code();
}
Archive::child_iterator Archive::child_begin(bool SkipInternal) const {
return child_end();
if (SkipInternal)
- return FirstRegular;
+ return Child(this, FirstRegularData, FirstRegularStartOfFile);
const char *Loc = Data.getBufferStart() + strlen(Magic);
- Child c(this, Loc);
- return c;
+ std::error_code EC;
+ Child c(this, Loc, &EC);
+ if (EC)
+ return child_iterator(EC);
+ return child_iterator(c);
}
Archive::child_iterator Archive::child_end() const {
- return Child(this, nullptr);
+ return Child(this, nullptr, nullptr);
}
StringRef Archive::Symbol::getName() const {
- return Parent->SymbolTable->getBuffer().begin() + StringIndex;
+ return Parent->getSymbolTable().begin() + StringIndex;
}
-ErrorOr<Archive::child_iterator> Archive::Symbol::getMember() const {
- const char *Buf = Parent->SymbolTable->getBuffer().begin();
- const char *Offsets = Buf + 4;
+ErrorOr<Archive::Child> Archive::Symbol::getMember() const {
+ const char *Buf = Parent->getSymbolTable().begin();
+ const char *Offsets = Buf;
+ if (Parent->kind() == K_MIPS64)
+ Offsets += sizeof(uint64_t);
+ else
+ Offsets += sizeof(uint32_t);
uint32_t Offset = 0;
if (Parent->kind() == K_GNU) {
- Offset =
- *(reinterpret_cast<const support::ubig32_t *>(Offsets) + SymbolIndex);
+ Offset = read32be(Offsets + SymbolIndex * 4);
+ } else if (Parent->kind() == K_MIPS64) {
+ Offset = read64be(Offsets + SymbolIndex * 8);
} else if (Parent->kind() == K_BSD) {
// The SymbolIndex is an index into the ranlib structs that start at
// Offsets (the first uint32_t is the number of bytes of the ranlib
// being a string table offset and the second being the offset into
// the archive of the member that defines the symbol. Which is what
// is needed here.
- Offset = *(reinterpret_cast<const support::ulittle32_t *>(Offsets) +
- (SymbolIndex * 2) + 1);
+ Offset = read32le(Offsets + SymbolIndex * 8 + 4);
} else {
- uint32_t MemberCount = *reinterpret_cast<const support::ulittle32_t*>(Buf);
-
// Skip offsets.
- Buf += sizeof(support::ulittle32_t) +
- (MemberCount * sizeof(support::ulittle32_t));
-
- uint32_t SymbolCount = *reinterpret_cast<const support::ulittle32_t*>(Buf);
+ uint32_t MemberCount = read32le(Buf);
+ Buf += MemberCount * 4 + 4;
+ uint32_t SymbolCount = read32le(Buf);
if (SymbolIndex >= SymbolCount)
return object_error::parse_failed;
// Skip SymbolCount to get to the indices table.
- const char *Indices = Buf + sizeof(support::ulittle32_t);
+ const char *Indices = Buf + 4;
// Get the index of the offset in the file member offset table for this
// symbol.
- uint16_t OffsetIndex =
- *(reinterpret_cast<const support::ulittle16_t*>(Indices)
- + SymbolIndex);
+ uint16_t OffsetIndex = read16le(Indices + SymbolIndex * 2);
// Subtract 1 since OffsetIndex is 1 based.
--OffsetIndex;
if (OffsetIndex >= MemberCount)
return object_error::parse_failed;
- Offset = *(reinterpret_cast<const support::ulittle32_t*>(Offsets)
- + OffsetIndex);
+ Offset = read32le(Offsets + OffsetIndex * 4);
}
const char *Loc = Parent->getData().begin() + Offset;
- child_iterator Iter(Child(Parent, Loc));
- return Iter;
+ std::error_code EC;
+ Child C(Parent, Loc, &EC);
+ if (EC)
+ return EC;
+ return C;
}
Archive::Symbol Archive::Symbol::getNext() const {
// and the second being the offset into the archive of the member that
// define the symbol. After that the next uint32_t is the byte count of
// the string table followed by the string table.
- const char *Buf = Parent->SymbolTable->getBuffer().begin();
+ const char *Buf = Parent->getSymbolTable().begin();
uint32_t RanlibCount = 0;
- RanlibCount = (*reinterpret_cast<const support::ulittle32_t *>(Buf)) /
- (sizeof(uint32_t) * 2);
+ RanlibCount = read32le(Buf) / 8;
// If t.SymbolIndex + 1 will be past the count of symbols (the RanlibCount)
// don't change the t.StringIndex as we don't want to reference a ranlib
// past RanlibCount.
const char *Ranlibs = Buf + 4;
uint32_t CurRanStrx = 0;
uint32_t NextRanStrx = 0;
- CurRanStrx = *(reinterpret_cast<const support::ulittle32_t *>(Ranlibs) +
- (t.SymbolIndex * 2));
- NextRanStrx = *(reinterpret_cast<const support::ulittle32_t *>(Ranlibs) +
- ((t.SymbolIndex + 1) * 2));
+ CurRanStrx = read32le(Ranlibs + t.SymbolIndex * 8);
+ NextRanStrx = read32le(Ranlibs + (t.SymbolIndex + 1) * 8);
t.StringIndex -= CurRanStrx;
t.StringIndex += NextRanStrx;
}
} else {
// Go to one past next null.
- t.StringIndex =
- Parent->SymbolTable->getBuffer().find('\0', t.StringIndex) + 1;
+ t.StringIndex = Parent->getSymbolTable().find('\0', t.StringIndex) + 1;
}
++t.SymbolIndex;
return t;
if (!hasSymbolTable())
return symbol_iterator(Symbol(this, 0, 0));
- const char *buf = SymbolTable->getBuffer().begin();
+ const char *buf = getSymbolTable().begin();
if (kind() == K_GNU) {
uint32_t symbol_count = 0;
- symbol_count = *reinterpret_cast<const support::ubig32_t*>(buf);
+ symbol_count = read32be(buf);
buf += sizeof(uint32_t) + (symbol_count * (sizeof(uint32_t)));
+ } else if (kind() == K_MIPS64) {
+ uint64_t symbol_count = read64be(buf);
+ buf += sizeof(uint64_t) + (symbol_count * (sizeof(uint64_t)));
} else if (kind() == K_BSD) {
// The __.SYMDEF or "__.SYMDEF SORTED" member starts with a uint32_t
// which is the number of bytes of ranlib structs that follow. The ranlib
// define the symbol. After that the next uint32_t is the byte count of
// the string table followed by the string table.
uint32_t ranlib_count = 0;
- ranlib_count = (*reinterpret_cast<const support::ulittle32_t *>(buf)) /
- (sizeof(uint32_t) * 2);
+ ranlib_count = read32le(buf) / 8;
const char *ranlibs = buf + 4;
uint32_t ran_strx = 0;
- ran_strx = *(reinterpret_cast<const support::ulittle32_t *>(ranlibs));
+ ran_strx = read32le(ranlibs);
buf += sizeof(uint32_t) + (ranlib_count * (2 * (sizeof(uint32_t))));
// Skip the byte count of the string table.
buf += sizeof(uint32_t);
} else {
uint32_t member_count = 0;
uint32_t symbol_count = 0;
- member_count = *reinterpret_cast<const support::ulittle32_t*>(buf);
+ member_count = read32le(buf);
buf += 4 + (member_count * 4); // Skip offsets.
- symbol_count = *reinterpret_cast<const support::ulittle32_t*>(buf);
+ symbol_count = read32le(buf);
buf += 4 + (symbol_count * 2); // Skip indices.
}
- uint32_t string_start_offset = buf - SymbolTable->getBuffer().begin();
+ uint32_t string_start_offset = buf - getSymbolTable().begin();
return symbol_iterator(Symbol(this, 0, string_start_offset));
}
Archive::symbol_iterator Archive::symbol_end() const {
- if (!hasSymbolTable())
- return symbol_iterator(Symbol(this, 0, 0));
+ return symbol_iterator(Symbol(this, getNumberOfSymbols(), 0));
+}
- const char *buf = SymbolTable->getBuffer().begin();
- uint32_t symbol_count = 0;
- if (kind() == K_GNU) {
- symbol_count = *reinterpret_cast<const support::ubig32_t*>(buf);
- } else if (kind() == K_BSD) {
- symbol_count = (*reinterpret_cast<const support::ulittle32_t *>(buf)) /
- (sizeof(uint32_t) * 2);
- } else {
- uint32_t member_count = 0;
- member_count = *reinterpret_cast<const support::ulittle32_t*>(buf);
- buf += 4 + (member_count * 4); // Skip offsets.
- symbol_count = *reinterpret_cast<const support::ulittle32_t*>(buf);
- }
- return symbol_iterator(Symbol(this, symbol_count, 0));
+uint32_t Archive::getNumberOfSymbols() const {
+ if (!hasSymbolTable())
+ return 0;
+ const char *buf = getSymbolTable().begin();
+ if (kind() == K_GNU)
+ return read32be(buf);
+ if (kind() == K_MIPS64)
+ return read64be(buf);
+ if (kind() == K_BSD)
+ return read32le(buf) / 8;
+ uint32_t member_count = 0;
+ member_count = read32le(buf);
+ buf += 4 + (member_count * 4); // Skip offsets.
+ return read32le(buf);
}
Archive::child_iterator Archive::findSym(StringRef name) const {
return child_end();
}
-bool Archive::hasSymbolTable() const {
- return SymbolTable != child_end();
-}
+bool Archive::hasSymbolTable() const { return !SymbolTable.empty(); }
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