[llvm] 8d58eb1 - [llvm-libtool-darwin] Refactor ArchiveWriter
Sameer Arora via llvm-commits
llvm-commits at lists.llvm.org
Thu Aug 13 10:58:42 PDT 2020
Author: Sameer Arora
Date: 2020-08-13T10:56:30-07:00
New Revision: 8d58eb11f9dabacc37f1f5e2cc83149b24868180
URL: https://github.com/llvm/llvm-project/commit/8d58eb11f9dabacc37f1f5e2cc83149b24868180
DIFF: https://github.com/llvm/llvm-project/commit/8d58eb11f9dabacc37f1f5e2cc83149b24868180.diff
LOG: [llvm-libtool-darwin] Refactor ArchiveWriter
Refactoring function `writeArchive` in ArchiveWriter. Added a new
function `writeArchiveBuffer` that returns the archive in a memory
buffer instead of writing it out to the disk. This refactor is necessary
so as to allow `llvm-libtool-darwin` to write universal files containing
archives.
Reviewed by jhenderson, MaskRay, smeenai
Differential Revision: https://reviews.llvm.org/D84858
Added:
Modified:
llvm/include/llvm/Object/ArchiveWriter.h
llvm/lib/Object/ArchiveWriter.cpp
Removed:
################################################################################
diff --git a/llvm/include/llvm/Object/ArchiveWriter.h b/llvm/include/llvm/Object/ArchiveWriter.h
index 274ffd90c05a..7eaf13e8fb22 100644
--- a/llvm/include/llvm/Object/ArchiveWriter.h
+++ b/llvm/include/llvm/Object/ArchiveWriter.h
@@ -39,6 +39,12 @@ Error writeArchive(StringRef ArcName, ArrayRef<NewArchiveMember> NewMembers,
bool WriteSymtab, object::Archive::Kind Kind,
bool Deterministic, bool Thin,
std::unique_ptr<MemoryBuffer> OldArchiveBuf = nullptr);
+
+// writeArchiveToBuffer is similar to writeArchive but returns the Archive in a
+// buffer instead of writing it out to a file.
+Expected<std::unique_ptr<MemoryBuffer>>
+writeArchiveToBuffer(ArrayRef<NewArchiveMember> NewMembers, bool WriteSymtab,
+ object::Archive::Kind Kind, bool Deterministic, bool Thin);
}
#endif
diff --git a/llvm/lib/Object/ArchiveWriter.cpp b/llvm/lib/Object/ArchiveWriter.cpp
index 6f92c547164b..ca8ffa7706b0 100644
--- a/llvm/lib/Object/ArchiveWriter.cpp
+++ b/llvm/lib/Object/ArchiveWriter.cpp
@@ -26,6 +26,7 @@
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/Path.h"
+#include "llvm/Support/SmallVectorMemoryBuffer.h"
#include "llvm/Support/ToolOutputFile.h"
#include "llvm/Support/raw_ostream.h"
@@ -552,10 +553,10 @@ Expected<std::string> computeArchiveRelativePath(StringRef From, StringRef To) {
return std::string(Relative.str());
}
-Error writeArchive(StringRef ArcName, ArrayRef<NewArchiveMember> NewMembers,
- bool WriteSymtab, object::Archive::Kind Kind,
- bool Deterministic, bool Thin,
- std::unique_ptr<MemoryBuffer> OldArchiveBuf) {
+static Error writeArchiveToStream(raw_ostream &Out,
+ ArrayRef<NewArchiveMember> NewMembers,
+ bool WriteSymtab, object::Archive::Kind Kind,
+ bool Deterministic, bool Thin) {
assert((!Thin || !isBSDLike(Kind)) && "Only the gnu format has a thin mode");
SmallString<0> SymNamesBuf;
@@ -608,12 +609,6 @@ Error writeArchive(StringRef ArcName, ArrayRef<NewArchiveMember> NewMembers,
}
}
- Expected<sys::fs::TempFile> Temp =
- sys::fs::TempFile::create(ArcName + ".temp-archive-%%%%%%%.a");
- if (!Temp)
- return Temp.takeError();
-
- raw_fd_ostream Out(Temp->FD, false);
if (Thin)
Out << "!<thin>\n";
else
@@ -626,6 +621,25 @@ Error writeArchive(StringRef ArcName, ArrayRef<NewArchiveMember> NewMembers,
Out << M.Header << M.Data << M.Padding;
Out.flush();
+ return Error::success();
+}
+
+Error writeArchive(StringRef ArcName, ArrayRef<NewArchiveMember> NewMembers,
+ bool WriteSymtab, object::Archive::Kind Kind,
+ bool Deterministic, bool Thin,
+ std::unique_ptr<MemoryBuffer> OldArchiveBuf) {
+ Expected<sys::fs::TempFile> Temp =
+ sys::fs::TempFile::create(ArcName + ".temp-archive-%%%%%%%.a");
+ if (!Temp)
+ return Temp.takeError();
+ raw_fd_ostream Out(Temp->FD, false);
+
+ if (Error E = writeArchiveToStream(Out, NewMembers, WriteSymtab, Kind,
+ Deterministic, Thin)) {
+ if (Error DiscardError = Temp->discard())
+ return joinErrors(std::move(E), std::move(DiscardError));
+ return E;
+ }
// At this point, we no longer need whatever backing memory
// was used to generate the NewMembers. On Windows, this buffer
@@ -642,4 +656,19 @@ Error writeArchive(StringRef ArcName, ArrayRef<NewArchiveMember> NewMembers,
return Temp->keep(ArcName);
}
+Expected<std::unique_ptr<MemoryBuffer>>
+writeArchiveToBuffer(ArrayRef<NewArchiveMember> NewMembers, bool WriteSymtab,
+ object::Archive::Kind Kind, bool Deterministic,
+ bool Thin) {
+ SmallVector<char, 0> ArchiveBufferVector;
+ raw_svector_ostream ArchiveStream(ArchiveBufferVector);
+
+ if (Error E = writeArchiveToStream(ArchiveStream, NewMembers, WriteSymtab,
+ Kind, Deterministic, Thin))
+ return std::move(E);
+
+ return std::make_unique<SmallVectorMemoryBuffer>(
+ std::move(ArchiveBufferVector));
+}
+
} // namespace llvm
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