Update prebuilt Clang to r353983e.HEADq10.0

clang 9.0.5 (based on r353983e) from build 5696680.

Bug: http://b/135931688
Bug: http://b/136008926
Test: N/A
Change-Id: I922d17410047d2e2df4625615352c588ee71b203

1 files changed, 339 insertions, 0 deletions

diff --git a/clang-r353983e/include/llvm/Object/Wasm.h b/clang-r353983e/include/llvm/Object/Wasm.h
new file mode 100644
index 00000000..a0a2c4bf
--- /dev/null
+++ b/clang-r353983e/include/llvm/Object/Wasm.h
@@ -0,0 +1,339 @@
+//===- Wasm.h - Wasm object file implementation -----------------*- 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
+//
+//===----------------------------------------------------------------------===//
+//
+// This file declares the WasmObjectFile class, which implements the ObjectFile
+// interface for Wasm files.
+//
+// See: https://github.com/WebAssembly/design/blob/master/BinaryEncoding.md
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_OBJECT_WASM_H
+#define LLVM_OBJECT_WASM_H
+
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/StringMap.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/BinaryFormat/Wasm.h"
+#include "llvm/Config/llvm-config.h"
+#include "llvm/MC/MCSymbolWasm.h"
+#include "llvm/Object/Binary.h"
+#include "llvm/Object/ObjectFile.h"
+#include "llvm/Support/Error.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include <cstddef>
+#include <cstdint>
+#include <vector>
+
+namespace llvm {
+namespace object {
+
+class WasmSymbol {
+public:
+  WasmSymbol(const wasm::WasmSymbolInfo &Info,
+             const wasm::WasmGlobalType *GlobalType,
+             const wasm::WasmEventType *EventType,
+             const wasm::WasmSignature *Signature)
+      : Info(Info), GlobalType(GlobalType), EventType(EventType),
+        Signature(Signature) {}
+
+  const wasm::WasmSymbolInfo &Info;
+  const wasm::WasmGlobalType *GlobalType;
+  const wasm::WasmEventType *EventType;
+  const wasm::WasmSignature *Signature;
+
+  bool isTypeFunction() const {
+    return Info.Kind == wasm::WASM_SYMBOL_TYPE_FUNCTION;
+  }
+
+  bool isTypeData() const { return Info.Kind == wasm::WASM_SYMBOL_TYPE_DATA; }
+
+  bool isTypeGlobal() const {
+    return Info.Kind == wasm::WASM_SYMBOL_TYPE_GLOBAL;
+  }
+
+  bool isTypeSection() const {
+    return Info.Kind == wasm::WASM_SYMBOL_TYPE_SECTION;
+  }
+
+  bool isTypeEvent() const { return Info.Kind == wasm::WASM_SYMBOL_TYPE_EVENT; }
+
+  bool isDefined() const { return !isUndefined(); }
+
+  bool isUndefined() const {
+    return (Info.Flags & wasm::WASM_SYMBOL_UNDEFINED) != 0;
+  }
+
+  bool isBindingWeak() const {
+    return getBinding() == wasm::WASM_SYMBOL_BINDING_WEAK;
+  }
+
+  bool isBindingGlobal() const {
+    return getBinding() == wasm::WASM_SYMBOL_BINDING_GLOBAL;
+  }
+
+  bool isBindingLocal() const {
+    return getBinding() == wasm::WASM_SYMBOL_BINDING_LOCAL;
+  }
+
+  unsigned getBinding() const {
+    return Info.Flags & wasm::WASM_SYMBOL_BINDING_MASK;
+  }
+
+  bool isHidden() const {
+    return getVisibility() == wasm::WASM_SYMBOL_VISIBILITY_HIDDEN;
+  }
+
+  unsigned getVisibility() const {
+    return Info.Flags & wasm::WASM_SYMBOL_VISIBILITY_MASK;
+  }
+
+  void print(raw_ostream &Out) const;
+
+#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
+  LLVM_DUMP_METHOD void dump() const;
+#endif
+};
+
+struct WasmSection {
+  WasmSection() = default;
+
+  uint32_t Type = 0;         // Section type (See below)
+  uint32_t Offset = 0;       // Offset with in the file
+  StringRef Name;            // Section name (User-defined sections only)
+  ArrayRef<uint8_t> Content; // Section content
+  std::vector<wasm::WasmRelocation> Relocations; // Relocations for this section
+};
+
+struct WasmSegment {
+  uint32_t SectionOffset;
+  wasm::WasmDataSegment Data;
+};
+
+class WasmObjectFile : public ObjectFile {
+
+public:
+  WasmObjectFile(MemoryBufferRef Object, Error &Err);
+
+  const wasm::WasmObjectHeader &getHeader() const;
+  const WasmSymbol &getWasmSymbol(const DataRefImpl &Symb) const;
+  const WasmSymbol &getWasmSymbol(const SymbolRef &Symbol) const;
+  const WasmSection &getWasmSection(const SectionRef &Section) const;
+  const wasm::WasmRelocation &getWasmRelocation(const RelocationRef &Ref) const;
+
+  static bool classof(const Binary *v) { return v->isWasm(); }
+
+  const wasm::WasmDylinkInfo &dylinkInfo() const { return DylinkInfo; }
+  const wasm::WasmProducerInfo &getProducerInfo() const { return ProducerInfo; }
+  ArrayRef<wasm::WasmSignature> types() const { return Signatures; }
+  ArrayRef<uint32_t> functionTypes() const { return FunctionTypes; }
+  ArrayRef<wasm::WasmImport> imports() const { return Imports; }
+  ArrayRef<wasm::WasmTable> tables() const { return Tables; }
+  ArrayRef<wasm::WasmLimits> memories() const { return Memories; }
+  ArrayRef<wasm::WasmGlobal> globals() const { return Globals; }
+  ArrayRef<wasm::WasmEvent> events() const { return Events; }
+  ArrayRef<wasm::WasmExport> exports() const { return Exports; }
+  ArrayRef<WasmSymbol> syms() const { return Symbols; }
+  const wasm::WasmLinkingData &linkingData() const { return LinkingData; }
+  uint32_t getNumberOfSymbols() const { return Symbols.size(); }
+  ArrayRef<wasm::WasmElemSegment> elements() const { return ElemSegments; }
+  ArrayRef<WasmSegment> dataSegments() const { return DataSegments; }
+  ArrayRef<wasm::WasmFunction> functions() const { return Functions; }
+  ArrayRef<wasm::WasmFunctionName> debugNames() const { return DebugNames; }
+  uint32_t startFunction() const { return StartFunction; }
+  uint32_t getNumImportedGlobals() const { return NumImportedGlobals; }
+  uint32_t getNumImportedFunctions() const { return NumImportedFunctions; }
+  uint32_t getNumImportedEvents() const { return NumImportedEvents; }
+  void moveSymbolNext(DataRefImpl &Symb) const override;
+
+  uint32_t getSymbolFlags(DataRefImpl Symb) const override;
+
+  basic_symbol_iterator symbol_begin() const override;
+
+  basic_symbol_iterator symbol_end() const override;
+  Expected<StringRef> getSymbolName(DataRefImpl Symb) const override;
+
+  Expected<uint64_t> getSymbolAddress(DataRefImpl Symb) const override;
+  uint64_t getWasmSymbolValue(const WasmSymbol &Sym) const;
+  uint64_t getSymbolValueImpl(DataRefImpl Symb) const override;
+  uint32_t getSymbolAlignment(DataRefImpl Symb) const override;
+  uint64_t getCommonSymbolSizeImpl(DataRefImpl Symb) const override;
+  Expected<SymbolRef::Type> getSymbolType(DataRefImpl Symb) const override;
+  Expected<section_iterator> getSymbolSection(DataRefImpl Symb) const override;
+
+  // Overrides from SectionRef.
+  void moveSectionNext(DataRefImpl &Sec) const override;
+  std::error_code getSectionName(DataRefImpl Sec,
+                                 StringRef &Res) const override;
+  uint64_t getSectionAddress(DataRefImpl Sec) const override;
+  uint64_t getSectionIndex(DataRefImpl Sec) const override;
+  uint64_t getSectionSize(DataRefImpl Sec) const override;
+  std::error_code getSectionContents(DataRefImpl Sec,
+                                     StringRef &Res) const override;
+  uint64_t getSectionAlignment(DataRefImpl Sec) const override;
+  bool isSectionCompressed(DataRefImpl Sec) const override;
+  bool isSectionText(DataRefImpl Sec) const override;
+  bool isSectionData(DataRefImpl Sec) const override;
+  bool isSectionBSS(DataRefImpl Sec) const override;
+  bool isSectionVirtual(DataRefImpl Sec) const override;
+  bool isSectionBitcode(DataRefImpl Sec) const override;
+  relocation_iterator section_rel_begin(DataRefImpl Sec) const override;
+  relocation_iterator section_rel_end(DataRefImpl Sec) const override;
+
+  // Overrides from RelocationRef.
+  void moveRelocationNext(DataRefImpl &Rel) const override;
+  uint64_t getRelocationOffset(DataRefImpl Rel) const override;
+  symbol_iterator getRelocationSymbol(DataRefImpl Rel) const override;
+  uint64_t getRelocationType(DataRefImpl Rel) const override;
+  void getRelocationTypeName(DataRefImpl Rel,
+                             SmallVectorImpl<char> &Result) const override;
+
+  section_iterator section_begin() const override;
+  section_iterator section_end() const override;
+  uint8_t getBytesInAddress() const override;
+  StringRef getFileFormatName() const override;
+  Triple::ArchType getArch() const override;
+  SubtargetFeatures getFeatures() const override;
+  bool isRelocatableObject() const override;
+  bool isSharedObject() const;
+
+  struct ReadContext {
+    const uint8_t *Start;
+    const uint8_t *Ptr;
+    const uint8_t *End;
+  };
+
+private:
+  bool isValidFunctionIndex(uint32_t Index) const;
+  bool isDefinedFunctionIndex(uint32_t Index) const;
+  bool isValidGlobalIndex(uint32_t Index) const;
+  bool isDefinedGlobalIndex(uint32_t Index) const;
+  bool isValidEventIndex(uint32_t Index) const;
+  bool isDefinedEventIndex(uint32_t Index) const;
+  bool isValidFunctionSymbol(uint32_t Index) const;
+  bool isValidGlobalSymbol(uint32_t Index) const;
+  bool isValidEventSymbol(uint32_t Index) const;
+  bool isValidDataSymbol(uint32_t Index) const;
+  bool isValidSectionSymbol(uint32_t Index) const;
+  wasm::WasmFunction &getDefinedFunction(uint32_t Index);
+  const wasm::WasmFunction &getDefinedFunction(uint32_t Index) const;
+  wasm::WasmGlobal &getDefinedGlobal(uint32_t Index);
+  wasm::WasmEvent &getDefinedEvent(uint32_t Index);
+
+  const WasmSection &getWasmSection(DataRefImpl Ref) const;
+  const wasm::WasmRelocation &getWasmRelocation(DataRefImpl Ref) const;
+
+  Error parseSection(WasmSection &Sec);
+  Error parseCustomSection(WasmSection &Sec, ReadContext &Ctx);
+
+  // Standard section types
+  Error parseTypeSection(ReadContext &Ctx);
+  Error parseImportSection(ReadContext &Ctx);
+  Error parseFunctionSection(ReadContext &Ctx);
+  Error parseTableSection(ReadContext &Ctx);
+  Error parseMemorySection(ReadContext &Ctx);
+  Error parseGlobalSection(ReadContext &Ctx);
+  Error parseEventSection(ReadContext &Ctx);
+  Error parseExportSection(ReadContext &Ctx);
+  Error parseStartSection(ReadContext &Ctx);
+  Error parseElemSection(ReadContext &Ctx);
+  Error parseCodeSection(ReadContext &Ctx);
+  Error parseDataSection(ReadContext &Ctx);
+
+  // Custom section types
+  Error parseDylinkSection(ReadContext &Ctx);
+  Error parseNameSection(ReadContext &Ctx);
+  Error parseLinkingSection(ReadContext &Ctx);
+  Error parseLinkingSectionSymtab(ReadContext &Ctx);
+  Error parseLinkingSectionComdat(ReadContext &Ctx);
+  Error parseProducersSection(ReadContext &Ctx);
+  Error parseRelocSection(StringRef Name, ReadContext &Ctx);
+
+  wasm::WasmObjectHeader Header;
+  std::vector<WasmSection> Sections;
+  wasm::WasmDylinkInfo DylinkInfo;
+  wasm::WasmProducerInfo ProducerInfo;
+  std::vector<wasm::WasmSignature> Signatures;
+  std::vector<uint32_t> FunctionTypes;
+  std::vector<wasm::WasmTable> Tables;
+  std::vector<wasm::WasmLimits> Memories;
+  std::vector<wasm::WasmGlobal> Globals;
+  std::vector<wasm::WasmEvent> Events;
+  std::vector<wasm::WasmImport> Imports;
+  std::vector<wasm::WasmExport> Exports;
+  std::vector<wasm::WasmElemSegment> ElemSegments;
+  std::vector<WasmSegment> DataSegments;
+  std::vector<wasm::WasmFunction> Functions;
+  std::vector<WasmSymbol> Symbols;
+  std::vector<wasm::WasmFunctionName> DebugNames;
+  uint32_t StartFunction = -1;
+  bool HasLinkingSection = false;
+  bool HasDylinkSection = false;
+  wasm::WasmLinkingData LinkingData;
+  uint32_t NumImportedGlobals = 0;
+  uint32_t NumImportedFunctions = 0;
+  uint32_t NumImportedEvents = 0;
+  uint32_t CodeSection = 0;
+  uint32_t DataSection = 0;
+  uint32_t GlobalSection = 0;
+  uint32_t EventSection = 0;
+};
+
+class WasmSectionOrderChecker {
+public:
+  // We define orders for all core wasm sections and known custom sections.
+  enum : int {
+    // Core sections
+    // The order of standard sections is precisely given by the spec.
+    WASM_SEC_ORDER_TYPE = 1,
+    WASM_SEC_ORDER_IMPORT = 2,
+    WASM_SEC_ORDER_FUNCTION = 3,
+    WASM_SEC_ORDER_TABLE = 4,
+    WASM_SEC_ORDER_MEMORY = 5,
+    WASM_SEC_ORDER_GLOBAL = 6,
+    WASM_SEC_ORDER_EVENT = 7,
+    WASM_SEC_ORDER_EXPORT = 8,
+    WASM_SEC_ORDER_START = 9,
+    WASM_SEC_ORDER_ELEM = 10,
+    WASM_SEC_ORDER_DATACOUNT = 11,
+    WASM_SEC_ORDER_CODE = 12,
+    WASM_SEC_ORDER_DATA = 13,
+
+    // Custom sections
+    // "dylink" should be the very first section in the module
+    WASM_SEC_ORDER_DYLINK = 0,
+    // "linking" section requires DATA section in order to validate data symbols
+    WASM_SEC_ORDER_LINKING = 100,
+    // Must come after "linking" section in order to validate reloc indexes.
+    WASM_SEC_ORDER_RELOC = 101,
+    // "name" section must appear after DATA. Comes after "linking" to allow
+    // symbol table to set default function name.
+    WASM_SEC_ORDER_NAME = 102,
+    // "producers" section must appear after "name" section.
+    WASM_SEC_ORDER_PRODUCERS = 103
+  };
+
+  bool isValidSectionOrder(unsigned ID, StringRef CustomSectionName = "");
+
+private:
+  int LastOrder = -1; // Lastly seen known section's order
+
+  // Returns -1 for unknown sections.
+  int getSectionOrder(unsigned ID, StringRef CustomSectionName = "");
+};
+
+} // end namespace object
+
+inline raw_ostream &operator<<(raw_ostream &OS, const object::WasmSymbol &Sym) {
+  Sym.print(OS);
+  return OS;
+}
+
+} // end namespace llvm
+
+#endif // LLVM_OBJECT_WASM_H