SwiftRemoteMirror: More convenience APIs for dumping

Add convenience functions for dumping the typeinfos via an isa pointer
and a typeref.

Author: bitjammer

include/swift/SwiftRemoteMirror/SwiftRemoteMirror.h

@@ -126,6 +126,14 @@ bool swift_reflection_projectExistential(SwiftReflectionContextRef ContextRef,
 /// Dump a brief description of the typeref as a tree to stderr.
 void swift_reflection_dumpTypeRef(swift_typeref_t OpaqueTypeRef);
 
+/// Dump information about the layout of a class instance from its isa pointer.
+void swift_reflection_dumpInfoForMetadata(SwiftReflectionContextRef ContextRef,
+                                          uintptr_t Metadata);
+
+/// Dump information about the layout for a typeref.
+void swift_reflection_dumpInfoForTypeRef(SwiftReflectionContextRef ContextRef,
+                                         swift_typeref_t OpaqueTypeRef);
+
 #ifdef __cplusplus
 } // extern "C"
 #endif

stdlib/public/SwiftRemoteMirror/SwiftRemoteMirror.cpp

@@ -231,3 +231,26 @@ void swift_reflection_dumpTypeRef(swift_typeref_t OpaqueTypeRef) {
     TR->dump();
   }
 }
+
+void swift_reflection_dumpInfoForMetadata(SwiftReflectionContextRef ContextRef,
+                                          uintptr_t Metadata) {
+  auto Context = reinterpret_cast<NativeReflectionContext *>(ContextRef);
+  auto TI = Context->getInstanceTypeInfo(Metadata);
+  if (TI == nullptr) {
+    std::cerr << "<null type info>" << std::endl;
+  } else {
+    TI->dump();
+  }
+}
+
+void swift_reflection_dumpInfoForTypeRef(SwiftReflectionContextRef ContextRef,
+                                         swift_typeref_t OpaqueTypeRef) {
+  auto Context = reinterpret_cast<NativeReflectionContext *>(ContextRef);
+  auto TR = reinterpret_cast<const TypeRef *>(OpaqueTypeRef);
+  auto TI = Context->getTypeInfo(TR);
+  if (TI == nullptr) {
+    std::cerr << "<null type info>" << std::endl;
+  } else {
+    TI->dump();
+  }
+}