3 #include "llvm/Object/Archive.h"
4 #include "llvm/Object/ArchiveWriter.h"
5 #include "llvm/Support/Path.h"
8 using namespace llvm::object;
10 struct RustArchiveMember {
16 : Filename(nullptr), Name(nullptr),
17 Child(nullptr, nullptr, nullptr)
20 ~RustArchiveMember() {}
23 struct RustArchiveIterator {
25 Archive::child_iterator Cur;
26 Archive::child_iterator End;
27 std::unique_ptr<Error> Err;
29 RustArchiveIterator(Archive::child_iterator Cur, Archive::child_iterator End,
30 std::unique_ptr<Error> Err)
34 Err(std::move(Err)) {}
37 enum class LLVMRustArchiveKind {
44 static Archive::Kind fromRust(LLVMRustArchiveKind Kind) {
46 case LLVMRustArchiveKind::GNU:
47 return Archive::K_GNU;
48 case LLVMRustArchiveKind::BSD:
49 return Archive::K_BSD;
50 case LLVMRustArchiveKind::COFF:
51 return Archive::K_COFF;
53 report_fatal_error("Bad ArchiveKind.");
57 typedef OwningBinary<Archive> *LLVMRustArchiveRef;
58 typedef RustArchiveMember *LLVMRustArchiveMemberRef;
59 typedef Archive::Child *LLVMRustArchiveChildRef;
60 typedef Archive::Child const *LLVMRustArchiveChildConstRef;
61 typedef RustArchiveIterator *LLVMRustArchiveIteratorRef;
63 extern "C" LLVMRustArchiveRef LLVMRustOpenArchive(char *Path) {
64 ErrorOr<std::unique_ptr<MemoryBuffer>> BufOr =
65 MemoryBuffer::getFile(Path, -1, false);
67 LLVMRustSetLastError(BufOr.getError().message().c_str());
71 Expected<std::unique_ptr<Archive>> ArchiveOr =
72 Archive::create(BufOr.get()->getMemBufferRef());
75 LLVMRustSetLastError(toString(ArchiveOr.takeError()).c_str());
79 OwningBinary<Archive> *Ret = new OwningBinary<Archive>(
80 std::move(ArchiveOr.get()), std::move(BufOr.get()));
85 extern "C" void LLVMRustDestroyArchive(LLVMRustArchiveRef RustArchive) {
89 extern "C" LLVMRustArchiveIteratorRef
90 LLVMRustArchiveIteratorNew(LLVMRustArchiveRef RustArchive) {
91 Archive *Archive = RustArchive->getBinary();
92 #if LLVM_VERSION_GE(10, 0)
93 std::unique_ptr<Error> Err = std::make_unique<Error>(Error::success());
95 std::unique_ptr<Error> Err = llvm::make_unique<Error>(Error::success());
97 auto Cur = Archive->child_begin(*Err);
99 LLVMRustSetLastError(toString(std::move(*Err)).c_str());
102 auto End = Archive->child_end();
103 return new RustArchiveIterator(Cur, End, std::move(Err));
106 extern "C" LLVMRustArchiveChildConstRef
107 LLVMRustArchiveIteratorNext(LLVMRustArchiveIteratorRef RAI) {
108 if (RAI->Cur == RAI->End)
111 // Advancing the iterator validates the next child, and this can
112 // uncover an error. LLVM requires that we check all Errors,
113 // so we only advance the iterator if we actually need to fetch
115 // This means we must not advance the iterator in the *first* call,
116 // but instead advance it *before* fetching the child in all later calls.
120 LLVMRustSetLastError(toString(std::move(*RAI->Err)).c_str());
127 if (RAI->Cur == RAI->End)
130 const Archive::Child &Child = *RAI->Cur.operator->();
131 Archive::Child *Ret = new Archive::Child(Child);
136 extern "C" void LLVMRustArchiveChildFree(LLVMRustArchiveChildRef Child) {
140 extern "C" void LLVMRustArchiveIteratorFree(LLVMRustArchiveIteratorRef RAI) {
144 extern "C" const char *
145 LLVMRustArchiveChildName(LLVMRustArchiveChildConstRef Child, size_t *Size) {
146 Expected<StringRef> NameOrErr = Child->getName();
148 // rustc_codegen_llvm currently doesn't use this error string, but it might be
149 // useful in the future, and in the mean time this tells LLVM that the
150 // error was not ignored and that it shouldn't abort the process.
151 LLVMRustSetLastError(toString(NameOrErr.takeError()).c_str());
154 StringRef Name = NameOrErr.get();
159 extern "C" const char *LLVMRustArchiveChildData(LLVMRustArchiveChildRef Child,
162 Expected<StringRef> BufOrErr = Child->getBuffer();
164 LLVMRustSetLastError(toString(BufOrErr.takeError()).c_str());
167 Buf = BufOrErr.get();
172 extern "C" LLVMRustArchiveMemberRef
173 LLVMRustArchiveMemberNew(char *Filename, char *Name,
174 LLVMRustArchiveChildRef Child) {
175 RustArchiveMember *Member = new RustArchiveMember;
176 Member->Filename = Filename;
179 Member->Child = *Child;
183 extern "C" void LLVMRustArchiveMemberFree(LLVMRustArchiveMemberRef Member) {
187 extern "C" LLVMRustResult
188 LLVMRustWriteArchive(char *Dst, size_t NumMembers,
189 const LLVMRustArchiveMemberRef *NewMembers,
190 bool WriteSymbtab, LLVMRustArchiveKind RustKind) {
192 std::vector<NewArchiveMember> Members;
193 auto Kind = fromRust(RustKind);
195 for (size_t I = 0; I < NumMembers; I++) {
196 auto Member = NewMembers[I];
197 assert(Member->Name);
198 if (Member->Filename) {
199 Expected<NewArchiveMember> MOrErr =
200 NewArchiveMember::getFile(Member->Filename, true);
202 LLVMRustSetLastError(toString(MOrErr.takeError()).c_str());
203 return LLVMRustResult::Failure;
205 MOrErr->MemberName = sys::path::filename(MOrErr->MemberName);
206 Members.push_back(std::move(*MOrErr));
208 Expected<NewArchiveMember> MOrErr =
209 NewArchiveMember::getOldMember(Member->Child, true);
211 LLVMRustSetLastError(toString(MOrErr.takeError()).c_str());
212 return LLVMRustResult::Failure;
214 Members.push_back(std::move(*MOrErr));
218 auto Result = writeArchive(Dst, Members, WriteSymbtab, Kind, true, false);
220 return LLVMRustResult::Success;
221 LLVMRustSetLastError(toString(std::move(Result)).c_str());
223 return LLVMRustResult::Failure;