using namespace lldb_private;
using namespace minidump;
-//------------------------------------------------------------------
-/// A placeholder module used for minidumps, where the original
-/// object files may not be available (so we can't parse the object
-/// files to extract the set of sections/segments)
-///
-/// This placeholder module has a single synthetic section (.module_image)
-/// which represents the module memory range covering the whole module.
-//------------------------------------------------------------------
-class PlaceholderModule : public Module {
+namespace {
+
+/// A minimal ObjectFile implementation providing a dummy object file for the
+/// cases when the real module binary is not available. This allows the module
+/// to show up in "image list" and symbols to be added to it.
+class PlaceholderObjectFile : public ObjectFile {
public:
- PlaceholderModule(const ModuleSpec &module_spec) :
- Module(module_spec.GetFileSpec(), module_spec.GetArchitecture()) {
- if (module_spec.GetUUID().IsValid())
- SetUUID(module_spec.GetUUID());
- }
-
- // Creates a synthetic module section covering the whole module image (and
- // sets the section load address as well)
- void CreateImageSection(const MinidumpModule *module, Target& target) {
- const ConstString section_name(".module_image");
- lldb::SectionSP section_sp(new Section(
- shared_from_this(), // Module to which this section belongs.
- nullptr, // ObjectFile
- 0, // Section ID.
- section_name, // Section name.
- eSectionTypeContainer, // Section type.
- module->base_of_image, // VM address.
- module->size_of_image, // VM size in bytes of this section.
- 0, // Offset of this section in the file.
- module->size_of_image, // Size of the section as found in the file.
- 12, // Alignment of the section (log2)
- 0, // Flags for this section.
- 1)); // Number of host bytes per target byte
- section_sp->SetPermissions(ePermissionsExecutable | ePermissionsReadable);
- GetSectionList()->AddSection(section_sp);
- target.GetSectionLoadList().SetSectionLoadAddress(
- section_sp, module->base_of_image);
+ PlaceholderObjectFile(const lldb::ModuleSP &module_sp,
+ const ModuleSpec &module_spec, lldb::offset_t base,
+ lldb::offset_t size)
+ : ObjectFile(module_sp, &module_spec.GetFileSpec(), /*file_offset*/ 0,
+ /*length*/ 0, /*data_sp*/ nullptr, /*data_offset*/ 0),
+ m_arch(module_spec.GetArchitecture()), m_uuid(module_spec.GetUUID()),
+ m_base(base), m_size(size) {
+ m_symtab_up = llvm::make_unique<Symtab>(this);
+ }
+
+ ConstString GetPluginName() override { return ConstString("placeholder"); }
+ uint32_t GetPluginVersion() override { return 1; }
+ bool ParseHeader() override { return true; }
+ Type CalculateType() override { return eTypeUnknown; }
+ Strata CalculateStrata() override { return eStrataUnknown; }
+ uint32_t GetDependentModules(FileSpecList &file_list) override { return 0; }
+ bool IsExecutable() const override { return false; }
+ ArchSpec GetArchitecture() override { return m_arch; }
+ UUID GetUUID() override { return m_uuid; }
+ Symtab *GetSymtab() override { return m_symtab_up.get(); }
+ bool IsStripped() override { return true; }
+ ByteOrder GetByteOrder() const override { return m_arch.GetByteOrder(); }
+
+ uint32_t GetAddressByteSize() const override {
+ return m_arch.GetAddressByteSize();
}
-ObjectFile *GetObjectFile() override { return nullptr; }
+ Address GetBaseAddress() override {
+ return Address(m_sections_up->GetSectionAtIndex(0), 0);
+ }
- SectionList *GetSectionList() override {
- return Module::GetUnifiedSectionList();
+ void CreateSections(SectionList &unified_section_list) override {
+ m_sections_up = llvm::make_unique<SectionList>();
+ auto section_sp = std::make_shared<Section>(
+ GetModule(), this, /*sect_id*/ 0, ConstString(".module_image"),
+ eSectionTypeOther, m_base, m_size, /*file_offset*/ 0, /*file_size*/ 0,
+ /*log2align*/ 0, /*flags*/ 0);
+ m_sections_up->AddSection(section_sp);
+ unified_section_list.AddSection(std::move(section_sp));
}
+
+ bool SetLoadAddress(Target &target, addr_t value,
+ bool value_is_offset) override {
+ assert(!value_is_offset);
+ assert(value == m_base);
+
+ // Create sections if they haven't been created already.
+ GetModule()->GetSectionList();
+ assert(m_sections_up->GetNumSections(0) == 1);
+
+ target.GetSectionLoadList().SetSectionLoadAddress(
+ m_sections_up->GetSectionAtIndex(0), m_base);
+ return true;
+ }
+
+ void Dump(Stream *s) override {
+ s->Format("Placeholder object file for {0} loaded at [{1:x}-{2:x})\n",
+ GetFileSpec(), m_base, m_base + m_size);
+ }
+
+private:
+ ArchSpec m_arch;
+ UUID m_uuid;
+ lldb::offset_t m_base;
+ lldb::offset_t m_size;
};
+} // namespace
ConstString ProcessMinidump::GetPluginNameStatic() {
static ConstString g_name("minidump");
auto file_spec = FileSpec(name.getValue(), GetArchitecture().GetTriple());
FileSystem::Instance().Resolve(file_spec);
ModuleSpec module_spec(file_spec, uuid);
+ module_spec.GetArchitecture() = GetArchitecture();
Status error;
lldb::ModuleSP module_sp = GetTarget().GetSharedModule(module_spec, &error);
if (!module_sp || error.Fail()) {
name.getValue().c_str());
}
- auto placeholder_module =
- std::make_shared<PlaceholderModule>(module_spec);
- placeholder_module->CreateImageSection(module, GetTarget());
- module_sp = placeholder_module;
+ module_sp = Module::CreateModuleFromObjectFile<PlaceholderObjectFile>(
+ module_spec, module->base_of_image, module->size_of_image);
GetTarget().GetImages().Append(module_sp);
}