[LLVM-C] Add Accessor for Mach-O Universal Binary Slices

Summary: Allow for retrieving an object file corresponding to an architecture-specific slice in a Mach-O universal binary file.

Reviewers: whitequark, deadalnix

Reviewed By: whitequark

Subscribers: hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D60378

llvm-svn: 361705

1 files changed, 15 insertions, 0 deletions

diff --git a/llvm/lib/Object/Object.cpp b/llvm/lib/Object/Object.cpp
index e2511b7aed0..d84798cc6dd 100644
--- a/llvm/lib/Object/Object.cpp
+++ b/llvm/lib/Object/Object.cpp
@@ -15,6 +15,7 @@
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/IR/LLVMContext.h"
 #include "llvm/Object/ObjectFile.h"
+#include "llvm/Object/MachOUniversal.h"
 
 using namespace llvm;
 using namespace object;
@@ -131,6 +132,20 @@ LLVMBinaryType LLVMBinaryGetType(LLVMBinaryRef BR) {
   return BinaryTypeMapper::mapBinaryTypeToLLVMBinaryType(unwrap(BR)->getType());
 }
 
+LLVMBinaryRef LLVMMachOUniversalBinaryCopyObjectForArch(LLVMBinaryRef BR,
+                                                        const char *Arch,
+                                                        size_t ArchLen,
+                                                        char **ErrorMessage) {
+  auto universal = cast<MachOUniversalBinary>(unwrap(BR));
+  Expected<std::unique_ptr<ObjectFile>> ObjOrErr(
+      universal->getObjectForArch({Arch, ArchLen}));
+  if (!ObjOrErr) {
+    *ErrorMessage = strdup(toString(ObjOrErr.takeError()).c_str());
+    return nullptr;
+  }
+  return wrap(ObjOrErr.get().release());
+}
+
 LLVMSectionIteratorRef LLVMObjectFileCopySectionIterator(LLVMBinaryRef BR) {
   auto OF = cast<ObjectFile>(unwrap(BR));
   auto sections = OF->sections();