Add data formatter for libstdc++ unique_ptr
Differential revision: https://reviews.llvm.org/D25734
llvm-svn: 284830
diff --git a/lldb/source/Plugins/Language/CPlusPlus/LibStdcppUniquePointer.cpp b/lldb/source/Plugins/Language/CPlusPlus/LibStdcppUniquePointer.cpp
new file mode 100644
index 0000000..03acc3b
--- /dev/null
+++ b/lldb/source/Plugins/Language/CPlusPlus/LibStdcppUniquePointer.cpp
@@ -0,0 +1,160 @@
+//===-- LibStdcppUniquePointer.cpp ------------------------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "LibStdcpp.h"
+
+#include <memory>
+#include <vector>
+
+#include "lldb/Core/ConstString.h"
+#include "lldb/Core/ValueObject.h"
+#include "lldb/DataFormatters/FormattersHelpers.h"
+#include "lldb/DataFormatters/TypeSynthetic.h"
+
+using namespace lldb;
+using namespace lldb_private;
+using namespace lldb_private::formatters;
+
+namespace {
+
+class LibStdcppUniquePtrSyntheticFrontEnd : public SyntheticChildrenFrontEnd {
+public:
+ explicit LibStdcppUniquePtrSyntheticFrontEnd(lldb::ValueObjectSP valobj_sp);
+
+ size_t CalculateNumChildren() override;
+
+ lldb::ValueObjectSP GetChildAtIndex(size_t idx) override;
+
+ bool Update() override;
+
+ bool MightHaveChildren() override;
+
+ size_t GetIndexOfChildWithName(const ConstString &name) override;
+
+ bool GetSummary(Stream &stream, const TypeSummaryOptions &options);
+
+private:
+ ValueObjectSP m_ptr_obj;
+ ValueObjectSP m_obj_obj;
+ ValueObjectSP m_del_obj;
+};
+
+} // end of anonymous namespace
+
+LibStdcppUniquePtrSyntheticFrontEnd::LibStdcppUniquePtrSyntheticFrontEnd(
+ lldb::ValueObjectSP valobj_sp)
+ : SyntheticChildrenFrontEnd(*valobj_sp) {
+ Update();
+}
+
+bool LibStdcppUniquePtrSyntheticFrontEnd::Update() {
+ ValueObjectSP valobj_backend_sp = m_backend.GetSP();
+ if (!valobj_backend_sp)
+ return false;
+
+ ValueObjectSP valobj_sp = valobj_backend_sp->GetNonSyntheticValue();
+ if (!valobj_sp)
+ return false;
+
+ ValueObjectSP tuple_sp =
+ valobj_sp->GetChildMemberWithName(ConstString("_M_t"), true);
+ if (!tuple_sp)
+ return false;
+
+ std::unique_ptr<SyntheticChildrenFrontEnd> tuple_frontend(
+ LibStdcppTupleSyntheticFrontEndCreator(nullptr, tuple_sp));
+
+ m_ptr_obj = tuple_frontend->GetChildAtIndex(0);
+ if (m_ptr_obj)
+ m_ptr_obj->SetName(ConstString("pointer"));
+
+ m_del_obj = tuple_frontend->GetChildAtIndex(1);
+ if (m_del_obj)
+ m_del_obj->SetName(ConstString("deleter"));
+
+ if (m_ptr_obj) {
+ Error error;
+ m_obj_obj = m_ptr_obj->Dereference(error);
+ if (error.Success()) {
+ m_obj_obj->SetName(ConstString("object"));
+ }
+ }
+
+ return false;
+}
+
+bool LibStdcppUniquePtrSyntheticFrontEnd::MightHaveChildren() { return true; }
+
+lldb::ValueObjectSP
+LibStdcppUniquePtrSyntheticFrontEnd::GetChildAtIndex(size_t idx) {
+ if (idx == 0)
+ return m_obj_obj;
+ if (idx == 1)
+ return m_del_obj;
+ if (idx == 2)
+ return m_ptr_obj;
+ return lldb::ValueObjectSP();
+}
+
+size_t LibStdcppUniquePtrSyntheticFrontEnd::CalculateNumChildren() {
+ if (m_del_obj)
+ return 2;
+ if (m_ptr_obj && m_ptr_obj->GetValueAsUnsigned(0) != 0)
+ return 1;
+ return 0;
+}
+
+size_t LibStdcppUniquePtrSyntheticFrontEnd::GetIndexOfChildWithName(
+ const ConstString &name) {
+ if (name == ConstString("obj") || name == ConstString("object"))
+ return 0;
+ if (name == ConstString("del") || name == ConstString("deleter"))
+ return 1;
+ if (name == ConstString("ptr") || name == ConstString("pointer"))
+ return 2;
+ return UINT32_MAX;
+}
+
+bool LibStdcppUniquePtrSyntheticFrontEnd::GetSummary(
+ Stream &stream, const TypeSummaryOptions &options) {
+ if (!m_ptr_obj)
+ return false;
+
+ if (m_ptr_obj->GetValueAsUnsigned(0) == 0) {
+ stream.Printf("nullptr");
+ } else {
+ Error error;
+ bool print_pointee = false;
+ if (m_obj_obj) {
+ if (m_obj_obj->DumpPrintableRepresentation(
+ stream, ValueObject::eValueObjectRepresentationStyleSummary,
+ lldb::eFormatInvalid,
+ ValueObject::ePrintableRepresentationSpecialCasesDisable,
+ false)) {
+ print_pointee = true;
+ }
+ }
+ if (!print_pointee)
+ stream.Printf("ptr = 0x%" PRIx64, m_ptr_obj->GetValueAsUnsigned(0));
+ }
+ return true;
+}
+
+SyntheticChildrenFrontEnd *
+lldb_private::formatters::LibStdcppUniquePtrSyntheticFrontEndCreator(
+ CXXSyntheticChildren *, lldb::ValueObjectSP valobj_sp) {
+ return (valobj_sp ? new LibStdcppUniquePtrSyntheticFrontEnd(valobj_sp)
+ : nullptr);
+}
+
+bool lldb_private::formatters::LibStdcppUniquePointerSummaryProvider(
+ ValueObject &valobj, Stream &stream, const TypeSummaryOptions &options) {
+ LibStdcppUniquePtrSyntheticFrontEnd formatter(valobj.GetSP());
+ return formatter.GetSummary(stream, options);
+}