Merge "Update prebuilt Clang to r353983." into p9.0HEADp9.0-backupp9.0

1 files changed, 227 insertions, 0 deletions

diff --git a/clang-r353983/include/llvm/DebugInfo/CodeView/RecordSerialization.h b/clang-r353983/include/llvm/DebugInfo/CodeView/RecordSerialization.h
new file mode 100644
index 00000000..618146ce
--- /dev/null
+++ b/clang-r353983/include/llvm/DebugInfo/CodeView/RecordSerialization.h
@@ -0,0 +1,227 @@
+//===- RecordSerialization.h ------------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_DEBUGINFO_CODEVIEW_RECORDSERIALIZATION_H
+#define LLVM_DEBUGINFO_CODEVIEW_RECORDSERIALIZATION_H
+
+#include "llvm/ADT/APSInt.h"
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/DebugInfo/CodeView/CodeView.h"
+#include "llvm/DebugInfo/CodeView/CodeViewError.h"
+#include "llvm/Support/BinaryStreamReader.h"
+#include "llvm/Support/Endian.h"
+#include "llvm/Support/Error.h"
+#include <cinttypes>
+#include <tuple>
+
+namespace llvm {
+namespace codeview {
+using llvm::support::little32_t;
+using llvm::support::ulittle16_t;
+using llvm::support::ulittle32_t;
+
+/// Limit on the size of all codeview symbol and type records, including the
+/// RecordPrefix. MSVC does not emit any records larger than this.
+enum : unsigned { MaxRecordLength = 0xFF00 };
+
+struct RecordPrefix {
+  ulittle16_t RecordLen;  // Record length, starting from &RecordKind.
+  ulittle16_t RecordKind; // Record kind enum (SymRecordKind or TypeRecordKind)
+};
+
+/// Reinterpret a byte array as an array of characters. Does not interpret as
+/// a C string, as StringRef has several helpers (split) that make that easy.
+StringRef getBytesAsCharacters(ArrayRef<uint8_t> LeafData);
+StringRef getBytesAsCString(ArrayRef<uint8_t> LeafData);
+
+inline Error consume(BinaryStreamReader &Reader) { return Error::success(); }
+
+/// Decodes a numeric "leaf" value. These are integer literals encountered in
+/// the type stream. If the value is positive and less than LF_NUMERIC (1 <<
+/// 15), it is emitted directly in Data. Otherwise, it has a tag like LF_CHAR
+/// that indicates the bitwidth and sign of the numeric data.
+Error consume(BinaryStreamReader &Reader, APSInt &Num);
+
+/// Decodes a numeric leaf value that is known to be a particular type.
+Error consume_numeric(BinaryStreamReader &Reader, uint64_t &Value);
+
+/// Decodes signed and unsigned fixed-length integers.
+Error consume(BinaryStreamReader &Reader, uint32_t &Item);
+Error consume(BinaryStreamReader &Reader, int32_t &Item);
+
+/// Decodes a null terminated string.
+Error consume(BinaryStreamReader &Reader, StringRef &Item);
+
+Error consume(StringRef &Data, APSInt &Num);
+Error consume(StringRef &Data, uint32_t &Item);
+
+/// Decodes an arbitrary object whose layout matches that of the underlying
+/// byte sequence, and returns a pointer to the object.
+template <typename T> Error consume(BinaryStreamReader &Reader, T *&Item) {
+  return Reader.readObject(Item);
+}
+
+template <typename T, typename U> struct serialize_conditional_impl {
+  serialize_conditional_impl(T &Item, U Func) : Item(Item), Func(Func) {}
+
+  Error deserialize(BinaryStreamReader &Reader) const {
+    if (!Func())
+      return Error::success();
+    return consume(Reader, Item);
+  }
+
+  T &Item;
+  U Func;
+};
+
+template <typename T, typename U>
+serialize_conditional_impl<T, U> serialize_conditional(T &Item, U Func) {
+  return serialize_conditional_impl<T, U>(Item, Func);
+}
+
+template <typename T, typename U> struct serialize_array_impl {
+  serialize_array_impl(ArrayRef<T> &Item, U Func) : Item(Item), Func(Func) {}
+
+  Error deserialize(BinaryStreamReader &Reader) const {
+    return Reader.readArray(Item, Func());
+  }
+
+  ArrayRef<T> &Item;
+  U Func;
+};
+
+template <typename T> struct serialize_vector_tail_impl {
+  serialize_vector_tail_impl(std::vector<T> &Item) : Item(Item) {}
+
+  Error deserialize(BinaryStreamReader &Reader) const {
+    T Field;
+    // Stop when we run out of bytes or we hit record padding bytes.
+    while (!Reader.empty() && Reader.peek() < LF_PAD0) {
+      if (auto EC = consume(Reader, Field))
+        return EC;
+      Item.push_back(Field);
+    }
+    return Error::success();
+  }
+
+  std::vector<T> &Item;
+};
+
+struct serialize_null_term_string_array_impl {
+  serialize_null_term_string_array_impl(std::vector<StringRef> &Item)
+      : Item(Item) {}
+
+  Error deserialize(BinaryStreamReader &Reader) const {
+    if (Reader.empty())
+      return make_error<CodeViewError>(cv_error_code::insufficient_buffer,
+                                       "Null terminated string is empty!");
+
+    while (Reader.peek() != 0) {
+      StringRef Field;
+      if (auto EC = Reader.readCString(Field))
+        return EC;
+      Item.push_back(Field);
+    }
+    return Reader.skip(1);
+  }
+
+  std::vector<StringRef> &Item;
+};
+
+template <typename T> struct serialize_arrayref_tail_impl {
+  serialize_arrayref_tail_impl(ArrayRef<T> &Item) : Item(Item) {}
+
+  Error deserialize(BinaryStreamReader &Reader) const {
+    uint32_t Count = Reader.bytesRemaining() / sizeof(T);
+    return Reader.readArray(Item, Count);
+  }
+
+  ArrayRef<T> &Item;
+};
+
+template <typename T> struct serialize_numeric_impl {
+  serialize_numeric_impl(T &Item) : Item(Item) {}
+
+  Error deserialize(BinaryStreamReader &Reader) const {
+    return consume_numeric(Reader, Item);
+  }
+
+  T &Item;
+};
+
+template <typename T, typename U>
+serialize_array_impl<T, U> serialize_array(ArrayRef<T> &Item, U Func) {
+  return serialize_array_impl<T, U>(Item, Func);
+}
+
+inline serialize_null_term_string_array_impl
+serialize_null_term_string_array(std::vector<StringRef> &Item) {
+  return serialize_null_term_string_array_impl(Item);
+}
+
+template <typename T>
+serialize_vector_tail_impl<T> serialize_array_tail(std::vector<T> &Item) {
+  return serialize_vector_tail_impl<T>(Item);
+}
+
+template <typename T>
+serialize_arrayref_tail_impl<T> serialize_array_tail(ArrayRef<T> &Item) {
+  return serialize_arrayref_tail_impl<T>(Item);
+}
+
+template <typename T> serialize_numeric_impl<T> serialize_numeric(T &Item) {
+  return serialize_numeric_impl<T>(Item);
+}
+
+template <typename T, typename U>
+Error consume(BinaryStreamReader &Reader,
+              const serialize_conditional_impl<T, U> &Item) {
+  return Item.deserialize(Reader);
+}
+
+template <typename T, typename U>
+Error consume(BinaryStreamReader &Reader,
+              const serialize_array_impl<T, U> &Item) {
+  return Item.deserialize(Reader);
+}
+
+inline Error consume(BinaryStreamReader &Reader,
+                     const serialize_null_term_string_array_impl &Item) {
+  return Item.deserialize(Reader);
+}
+
+template <typename T>
+Error consume(BinaryStreamReader &Reader,
+              const serialize_vector_tail_impl<T> &Item) {
+  return Item.deserialize(Reader);
+}
+
+template <typename T>
+Error consume(BinaryStreamReader &Reader,
+              const serialize_arrayref_tail_impl<T> &Item) {
+  return Item.deserialize(Reader);
+}
+
+template <typename T>
+Error consume(BinaryStreamReader &Reader,
+              const serialize_numeric_impl<T> &Item) {
+  return Item.deserialize(Reader);
+}
+
+template <typename T, typename U, typename... Args>
+Error consume(BinaryStreamReader &Reader, T &&X, U &&Y, Args &&... Rest) {
+  if (auto EC = consume(Reader, X))
+    return EC;
+  return consume(Reader, Y, std::forward<Args>(Rest)...);
+}
+
+}
+}
+
+#endif