include/llvm/ObjectYAML/MinidumpYAML.h

   1 //===- MinidumpYAML.h - Minidump YAMLIO implementation ----------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #ifndef LLVM_OBJECTYAML_MINIDUMPYAML_H
  10 #define LLVM_OBJECTYAML_MINIDUMPYAML_H
  11
  12 #include "llvm/BinaryFormat/Minidump.h"
  13 #include "llvm/Object/Minidump.h"
  14 #include "llvm/ObjectYAML/YAML.h"
  15 #include "llvm/Support/YAMLTraits.h"
  16
  17 namespace llvm {
  18 namespace MinidumpYAML {
  19
  20 /// The base class for all minidump streams. The "Type" of the stream
  21 /// corresponds to the Stream Type field in the minidump file. The "Kind" field
  22 /// specifies how are we going to treat it. For highly specialized streams (e.g.
  23 /// SystemInfo), there is a 1:1 mapping between Types and Kinds, but in general
  24 /// one stream Kind can be used to represent multiple stream Types (e.g. any
  25 /// unrecognised stream Type will be handled via RawContentStream). The mapping
  26 /// from Types to Kinds is fixed and given by the static getKind function.
  27 struct Stream {
  28   enum class StreamKind {
  29     MemoryList,
  30     ModuleList,
  31     RawContent,
  32     SystemInfo,
  33     TextContent,
  34     ThreadList,
  35   };
  36
  37   Stream(StreamKind Kind, minidump::StreamType Type) : Kind(Kind), Type(Type) {}
  38   virtual ~Stream(); // anchor
  39
  40   const StreamKind Kind;
  41   const minidump::StreamType Type;
  42
  43   /// Get the stream Kind used for representing streams of a given Type.
  44   static StreamKind getKind(minidump::StreamType Type);
  45
  46   /// Create an empty stream of the given Type.
  47   static std::unique_ptr<Stream> create(minidump::StreamType Type);
  48
  49   /// Create a stream from the given stream directory entry.
  50   static Expected<std::unique_ptr<Stream>>
  51   create(const minidump::Directory &StreamDesc,
  52          const object::MinidumpFile &File);
  53 };
  54
  55 namespace detail {
  56 /// A stream representing a list of abstract entries in a minidump stream. Its
  57 /// instantiations can be used to represent the ModuleList stream and other
  58 /// streams with a similar structure.
  59 template <typename EntryT> struct ListStream : public Stream {
  60   using entry_type = EntryT;
  61
  62   std::vector<entry_type> Entries;
  63
  64   explicit ListStream(std::vector<entry_type> Entries = {})
  65       : Stream(EntryT::Kind, EntryT::Type), Entries(std::move(Entries)) {}
  66
  67   static bool classof(const Stream *S) { return S->Kind == EntryT::Kind; }
  68 };
  69
  70 /// A structure containing all data belonging to a single minidump module.
  71 struct ParsedModule {
  72   static constexpr Stream::StreamKind Kind = Stream::StreamKind::ModuleList;
  73   static constexpr minidump::StreamType Type = minidump::StreamType::ModuleList;
  74
  75   minidump::Module Entry;
  76   std::string Name;
  77   yaml::BinaryRef CvRecord;
  78   yaml::BinaryRef MiscRecord;
  79 };
  80
  81 /// A structure containing all data belonging to a single minidump thread.
  82 struct ParsedThread {
  83   static constexpr Stream::StreamKind Kind = Stream::StreamKind::ThreadList;
  84   static constexpr minidump::StreamType Type = minidump::StreamType::ThreadList;
  85
  86   minidump::Thread Entry;
  87   yaml::BinaryRef Stack;
  88   yaml::BinaryRef Context;
  89 };
  90
  91 /// A structure containing all data describing a single memory region.
  92 struct ParsedMemoryDescriptor {
  93   static constexpr Stream::StreamKind Kind = Stream::StreamKind::MemoryList;
  94   static constexpr minidump::StreamType Type = minidump::StreamType::MemoryList;
  95
  96   minidump::MemoryDescriptor Entry;
  97   yaml::BinaryRef Content;
  98 };
  99 } // namespace detail
 100
 101 using ModuleListStream = detail::ListStream<detail::ParsedModule>;
 102 using ThreadListStream = detail::ListStream<detail::ParsedThread>;
 103 using MemoryListStream = detail::ListStream<detail::ParsedMemoryDescriptor>;
 104
 105 /// A minidump stream represented as a sequence of hex bytes. This is used as a
 106 /// fallback when no other stream kind is suitable.
 107 struct RawContentStream : public Stream {
 108   yaml::BinaryRef Content;
 109   yaml::Hex32 Size;
 110
 111   RawContentStream(minidump::StreamType Type, ArrayRef<uint8_t> Content = {})
 112       : Stream(StreamKind::RawContent, Type), Content(Content),
 113         Size(Content.size()) {}
 114
 115   static bool classof(const Stream *S) {
 116     return S->Kind == StreamKind::RawContent;
 117   }
 118 };
 119
 120 /// SystemInfo minidump stream.
 121 struct SystemInfoStream : public Stream {
 122   minidump::SystemInfo Info;
 123   std::string CSDVersion;
 124
 125   explicit SystemInfoStream(const minidump::SystemInfo &Info,
 126                             std::string CSDVersion)
 127       : Stream(StreamKind::SystemInfo, minidump::StreamType::SystemInfo),
 128         Info(Info), CSDVersion(std::move(CSDVersion)) {}
 129
 130   SystemInfoStream()
 131       : Stream(StreamKind::SystemInfo, minidump::StreamType::SystemInfo) {
 132     memset(&Info, 0, sizeof(Info));
 133   }
 134
 135   static bool classof(const Stream *S) {
 136     return S->Kind == StreamKind::SystemInfo;
 137   }
 138 };
 139
 140 /// A StringRef, which is printed using YAML block notation.
 141 LLVM_YAML_STRONG_TYPEDEF(StringRef, BlockStringRef)
 142
 143 /// A minidump stream containing textual data (typically, the contents of a
 144 /// /proc/<pid> file on linux).
 145 struct TextContentStream : public Stream {
 146   BlockStringRef Text;
 147
 148   TextContentStream(minidump::StreamType Type, StringRef Text = {})
 149       : Stream(StreamKind::TextContent, Type), Text(Text) {}
 150
 151   static bool classof(const Stream *S) {
 152     return S->Kind == StreamKind::TextContent;
 153   }
 154 };
 155
 156 /// The top level structure representing a minidump object, consisting of a
 157 /// minidump header, and zero or more streams. To construct an Object from a
 158 /// minidump file, use the static create function. To serialize to/from yaml,
 159 /// use the appropriate streaming operator on a yaml stream.
 160 struct Object {
 161   Object() = default;
 162   Object(const Object &) = delete;
 163   Object &operator=(const Object &) = delete;
 164   Object(Object &&) = default;
 165   Object &operator=(Object &&) = default;
 166
 167   Object(const minidump::Header &Header,
 168          std::vector<std::unique_ptr<Stream>> Streams)
 169       : Header(Header), Streams(std::move(Streams)) {}
 170
 171   /// The minidump header.
 172   minidump::Header Header;
 173
 174   /// The list of streams in this minidump object.
 175   std::vector<std::unique_ptr<Stream>> Streams;
 176
 177   static Expected<Object> create(const object::MinidumpFile &File);
 178 };
 179
 180 } // namespace MinidumpYAML
 181
 182 namespace yaml {
 183 template <> struct BlockScalarTraits<MinidumpYAML::BlockStringRef> {
 184   static void output(const MinidumpYAML::BlockStringRef &Text, void *,
 185                      raw_ostream &OS) {
 186     OS << Text;
 187   }
 188
 189   static StringRef input(StringRef Scalar, void *,
 190                          MinidumpYAML::BlockStringRef &Text) {
 191     Text = Scalar;
 192     return "";
 193   }
 194 };
 195
 196 template <> struct MappingTraits<std::unique_ptr<MinidumpYAML::Stream>> {
 197   static void mapping(IO &IO, std::unique_ptr<MinidumpYAML::Stream> &S);
 198   static StringRef validate(IO &IO, std::unique_ptr<MinidumpYAML::Stream> &S);
 199 };
 200
 201 template <> struct MappingContextTraits<minidump::MemoryDescriptor, BinaryRef> {
 202   static void mapping(IO &IO, minidump::MemoryDescriptor &Memory,
 203                       BinaryRef &Content);
 204 };
 205
 206 } // namespace yaml
 207
 208 } // namespace llvm
 209
 210 LLVM_YAML_DECLARE_ENUM_TRAITS(llvm::minidump::ProcessorArchitecture)
 211 LLVM_YAML_DECLARE_ENUM_TRAITS(llvm::minidump::OSPlatform)
 212 LLVM_YAML_DECLARE_ENUM_TRAITS(llvm::minidump::StreamType)
 213
 214 LLVM_YAML_DECLARE_MAPPING_TRAITS(llvm::minidump::CPUInfo::ArmInfo)
 215 LLVM_YAML_DECLARE_MAPPING_TRAITS(llvm::minidump::CPUInfo::OtherInfo)
 216 LLVM_YAML_DECLARE_MAPPING_TRAITS(llvm::minidump::CPUInfo::X86Info)
 217 LLVM_YAML_DECLARE_MAPPING_TRAITS(llvm::minidump::VSFixedFileInfo)
 218
 219 LLVM_YAML_DECLARE_MAPPING_TRAITS(
 220     llvm::MinidumpYAML::MemoryListStream::entry_type)
 221 LLVM_YAML_DECLARE_MAPPING_TRAITS(
 222     llvm::MinidumpYAML::ModuleListStream::entry_type)
 223 LLVM_YAML_DECLARE_MAPPING_TRAITS(
 224     llvm::MinidumpYAML::ThreadListStream::entry_type)
 225
 226 LLVM_YAML_IS_SEQUENCE_VECTOR(std::unique_ptr<llvm::MinidumpYAML::Stream>)
 227 LLVM_YAML_IS_SEQUENCE_VECTOR(llvm::MinidumpYAML::MemoryListStream::entry_type)
 228 LLVM_YAML_IS_SEQUENCE_VECTOR(llvm::MinidumpYAML::ModuleListStream::entry_type)
 229 LLVM_YAML_IS_SEQUENCE_VECTOR(llvm::MinidumpYAML::ThreadListStream::entry_type)
 230
 231 LLVM_YAML_DECLARE_MAPPING_TRAITS(llvm::MinidumpYAML::Object)
 232
 233 #endif // LLVM_OBJECTYAML_MINIDUMPYAML_H