Import LLVM 4.0.0 rc1 including clang and lld to help the current

development effort on OpenBSD/arm64.

1 files changed, 73 insertions, 0 deletions

diff --git a/gnu/llvm/lib/DebugInfo/CodeView/CVSymbolVisitor.cpp b/gnu/llvm/lib/DebugInfo/CodeView/CVSymbolVisitor.cpp
new file mode 100644
index 00000000000..75cfd0dd184
--- /dev/null
+++ b/gnu/llvm/lib/DebugInfo/CodeView/CVSymbolVisitor.cpp
@@ -0,0 +1,73 @@
+//===- CVSymbolVisitor.cpp --------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/CodeView/CVSymbolVisitor.h"
+
+#include "llvm/DebugInfo/CodeView/CodeViewError.h"
+#include "llvm/DebugInfo/CodeView/SymbolVisitorCallbacks.h"
+#include "llvm/DebugInfo/MSF/ByteStream.h"
+
+using namespace llvm;
+using namespace llvm::codeview;
+
+template <typename T>
+static Error takeObject(ArrayRef<uint8_t> &Data, const T *&Res) {
+  if (Data.size() < sizeof(*Res))
+    return llvm::make_error<CodeViewError>(cv_error_code::insufficient_buffer);
+  Res = reinterpret_cast<const T *>(Data.data());
+  Data = Data.drop_front(sizeof(*Res));
+  return Error::success();
+}
+
+CVSymbolVisitor::CVSymbolVisitor(SymbolVisitorCallbacks &Callbacks)
+    : Callbacks(Callbacks) {}
+
+template <typename T>
+static Error visitKnownRecord(CVSymbol &Record,
+                              SymbolVisitorCallbacks &Callbacks) {
+  SymbolRecordKind RK = static_cast<SymbolRecordKind>(Record.Type);
+  T KnownRecord(RK);
+  if (auto EC = Callbacks.visitKnownRecord(Record, KnownRecord))
+    return EC;
+  return Error::success();
+}
+
+Error CVSymbolVisitor::visitSymbolRecord(CVSymbol &Record) {
+  if (auto EC = Callbacks.visitSymbolBegin(Record))
+    return EC;
+
+  switch (Record.Type) {
+  default:
+    if (auto EC = Callbacks.visitUnknownSymbol(Record))
+      return EC;
+    break;
+#define SYMBOL_RECORD(EnumName, EnumVal, Name)                                 \
+  case EnumName: {                                                             \
+    if (auto EC = visitKnownRecord<Name>(Record, Callbacks))                   \
+      return EC;                                                               \
+    break;                                                                     \
+  }
+#define SYMBOL_RECORD_ALIAS(EnumName, EnumVal, Name, AliasName)                \
+  SYMBOL_RECORD(EnumVal, EnumVal, AliasName)
+#include "llvm/DebugInfo/CodeView/CVSymbolTypes.def"
+  }
+
+  if (auto EC = Callbacks.visitSymbolEnd(Record))
+    return EC;
+
+  return Error::success();
+}
+
+Error CVSymbolVisitor::visitSymbolStream(const CVSymbolArray &Symbols) {
+  for (auto I : Symbols) {
+    if (auto EC = visitSymbolRecord(I))
+      return EC;
+  }
+  return Error::success();
+}