LLVM CodeView library

[oota-llvm.git] / lib / DebugInfo / CodeView / ListRecordBuilder.cpp

diff --git a/lib/DebugInfo/CodeView/ListRecordBuilder.cpp b/lib/DebugInfo/CodeView/ListRecordBuilder.cpp
new file mode 100644 (file)
index 0000000..69c7e87
--- /dev/null
+++ b/lib/DebugInfo/CodeView/ListRecordBuilder.cpp
@@ -0,0 +1,31 @@
+//===-- ListRecordBuilder.cpp ---------------------------------------------===//
+//
+//                     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/ListRecordBuilder.h"
+
+using namespace llvm;
+using namespace codeview;
+
+ListRecordBuilder::ListRecordBuilder(TypeRecordKind Kind) : Builder(Kind) {}
+
+void ListRecordBuilder::finishSubRecord() {
+  // The builder starts at offset 2 in the actual CodeView buffer, so add an
+  // additional offset of 2 before computing the alignment.
+  uint32_t Remainder = (Builder.size() + 2) % 4;
+  if (Remainder != 0) {
+    for (int32_t PaddingBytesLeft = 4 - Remainder; PaddingBytesLeft > 0;
+         --PaddingBytesLeft) {
+      Builder.writeUInt8(0xf0 + PaddingBytesLeft);
+    }
+  }
+
+  // TODO: Split the list into multiple records if it's longer than 64KB, using
+  // a subrecord of TypeRecordKind::Index to chain the records together.
+  assert(Builder.size() < 65536);
+}