1 files changed, 168 insertions, 0 deletions

diff --git a/contrib/llvm-project/lldb/source/Plugins/ObjectFile/Breakpad/ObjectFileBreakpad.cpp b/contrib/llvm-project/lldb/source/Plugins/ObjectFile/Breakpad/ObjectFileBreakpad.cpp
new file mode 100644
index 000000000000..60dd9f9cecf0
--- /dev/null
+++ b/contrib/llvm-project/lldb/source/Plugins/ObjectFile/Breakpad/ObjectFileBreakpad.cpp
@@ -0,0 +1,168 @@
+//===-- ObjectFileBreakpad.cpp -------------------------------- -*- 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "Plugins/ObjectFile/Breakpad/ObjectFileBreakpad.h"
+#include "Plugins/ObjectFile/Breakpad/BreakpadRecords.h"
+#include "lldb/Core/ModuleSpec.h"
+#include "lldb/Core/PluginManager.h"
+#include "lldb/Core/Section.h"
+
+using namespace lldb;
+using namespace lldb_private;
+using namespace lldb_private::breakpad;
+
+namespace {
+struct Header {
+  ArchSpec arch;
+  UUID uuid;
+  static llvm::Optional<Header> parse(llvm::StringRef text);
+};
+} // namespace
+
+llvm::Optional<Header> Header::parse(llvm::StringRef text) {
+  llvm::StringRef line;
+  std::tie(line, text) = text.split('\n');
+  auto Module = ModuleRecord::parse(line);
+  if (!Module)
+    return llvm::None;
+
+  llvm::Triple triple;
+  triple.setArch(Module->Arch);
+  triple.setOS(Module->OS);
+
+  std::tie(line, text) = text.split('\n');
+
+  auto Info = InfoRecord::parse(line);
+  UUID uuid = Info && Info->ID ? Info->ID : Module->ID;
+  return Header{ArchSpec(triple), std::move(uuid)};
+}
+
+void ObjectFileBreakpad::Initialize() {
+  PluginManager::RegisterPlugin(GetPluginNameStatic(),
+                                GetPluginDescriptionStatic(), CreateInstance,
+                                CreateMemoryInstance, GetModuleSpecifications);
+}
+
+void ObjectFileBreakpad::Terminate() {
+  PluginManager::UnregisterPlugin(CreateInstance);
+}
+
+ConstString ObjectFileBreakpad::GetPluginNameStatic() {
+  static ConstString g_name("breakpad");
+  return g_name;
+}
+
+ObjectFile *ObjectFileBreakpad::CreateInstance(
+    const ModuleSP &module_sp, DataBufferSP &data_sp, offset_t data_offset,
+    const FileSpec *file, offset_t file_offset, offset_t length) {
+  if (!data_sp) {
+    data_sp = MapFileData(*file, length, file_offset);
+    if (!data_sp)
+      return nullptr;
+    data_offset = 0;
+  }
+  auto text = toStringRef(data_sp->GetData());
+  llvm::Optional<Header> header = Header::parse(text);
+  if (!header)
+    return nullptr;
+
+  // Update the data to contain the entire file if it doesn't already
+  if (data_sp->GetByteSize() < length) {
+    data_sp = MapFileData(*file, length, file_offset);
+    if (!data_sp)
+      return nullptr;
+    data_offset = 0;
+  }
+
+  return new ObjectFileBreakpad(module_sp, data_sp, data_offset, file,
+                                file_offset, length, std::move(header->arch),
+                                std::move(header->uuid));
+}
+
+ObjectFile *ObjectFileBreakpad::CreateMemoryInstance(
+    const ModuleSP &module_sp, DataBufferSP &data_sp,
+    const ProcessSP &process_sp, addr_t header_addr) {
+  return nullptr;
+}
+
+size_t ObjectFileBreakpad::GetModuleSpecifications(
+    const FileSpec &file, DataBufferSP &data_sp, offset_t data_offset,
+    offset_t file_offset, offset_t length, ModuleSpecList &specs) {
+  auto text = toStringRef(data_sp->GetData());
+  llvm::Optional<Header> header = Header::parse(text);
+  if (!header)
+    return 0;
+  ModuleSpec spec(file, std::move(header->arch));
+  spec.GetUUID() = std::move(header->uuid);
+  specs.Append(spec);
+  return 1;
+}
+
+ObjectFileBreakpad::ObjectFileBreakpad(const ModuleSP &module_sp,
+                                       DataBufferSP &data_sp,
+                                       offset_t data_offset,
+                                       const FileSpec *file, offset_t offset,
+                                       offset_t length, ArchSpec arch,
+                                       UUID uuid)
+    : ObjectFile(module_sp, file, offset, length, data_sp, data_offset),
+      m_arch(std::move(arch)), m_uuid(std::move(uuid)) {}
+
+bool ObjectFileBreakpad::ParseHeader() {
+  // We already parsed the header during initialization.
+  return true;
+}
+
+Symtab *ObjectFileBreakpad::GetSymtab() {
+  // TODO
+  return nullptr;
+}
+
+void ObjectFileBreakpad::CreateSections(SectionList &unified_section_list) {
+  if (m_sections_up)
+    return;
+  m_sections_up = llvm::make_unique<SectionList>();
+
+  llvm::Optional<Record::Kind> current_section;
+  offset_t section_start;
+  llvm::StringRef text = toStringRef(m_data.GetData());
+  uint32_t next_section_id = 1;
+  auto maybe_add_section = [&](const uint8_t *end_ptr) {
+    if (!current_section)
+      return; // We have been called before parsing the first line.
+
+    offset_t end_offset = end_ptr - m_data.GetDataStart();
+    auto section_sp = std::make_shared<Section>(
+        GetModule(), this, next_section_id++,
+        ConstString(toString(*current_section)), eSectionTypeOther,
+        /*file_vm_addr*/ 0, /*vm_size*/ 0, section_start,
+        end_offset - section_start, /*log2align*/ 0, /*flags*/ 0);
+    m_sections_up->AddSection(section_sp);
+    unified_section_list.AddSection(section_sp);
+  };
+  while (!text.empty()) {
+    llvm::StringRef line;
+    std::tie(line, text) = text.split('\n');
+
+    llvm::Optional<Record::Kind> next_section = Record::classify(line);
+    if (next_section == Record::Line) {
+      // Line records logically belong to the preceding Func record, so we put
+      // them in the same section.
+      next_section = Record::Func;
+    }
+    if (next_section == current_section)
+      continue;
+
+    // Changing sections, finish off the previous one, if there was any.
+    maybe_add_section(line.bytes_begin());
+    // And start a new one.
+    current_section = next_section;
+    section_start = line.bytes_begin() - m_data.GetDataStart();
+  }
+  // Finally, add the last section.
+  maybe_add_section(m_data.GetDataEnd());
+}