Revert "Improve the libstdc++ smart pointer formatters"
This reverts commit r284828, as it causes an infinite loop in
TestPrintStackTraces (funnily enough, only when logging is enabled).
llvm-svn: 285068
diff --git a/lldb/source/Plugins/Language/CPlusPlus/LibStdcpp.cpp b/lldb/source/Plugins/Language/CPlusPlus/LibStdcpp.cpp
index 979ca6e..2215b92 100644
--- a/lldb/source/Plugins/Language/CPlusPlus/LibStdcpp.cpp
+++ b/lldb/source/Plugins/Language/CPlusPlus/LibStdcpp.cpp
@@ -63,6 +63,21 @@
lldb::ValueObjectSP m_pair_sp;
};
+class LibStdcppSharedPtrSyntheticFrontEnd : public SyntheticChildrenFrontEnd {
+public:
+ explicit LibStdcppSharedPtrSyntheticFrontEnd(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;
+};
+
} // end of anonymous namespace
LibstdcppMapIteratorSyntheticFrontEnd::LibstdcppMapIteratorSyntheticFrontEnd(
@@ -336,3 +351,80 @@
}
return false;
}
+
+LibStdcppSharedPtrSyntheticFrontEnd::LibStdcppSharedPtrSyntheticFrontEnd(
+ lldb::ValueObjectSP valobj_sp)
+ : SyntheticChildrenFrontEnd(*valobj_sp) {
+ if (valobj_sp)
+ Update();
+}
+
+size_t LibStdcppSharedPtrSyntheticFrontEnd::CalculateNumChildren() { return 1; }
+
+lldb::ValueObjectSP
+LibStdcppSharedPtrSyntheticFrontEnd::GetChildAtIndex(size_t idx) {
+ ValueObjectSP valobj_sp = m_backend.GetSP();
+ if (!valobj_sp)
+ return lldb::ValueObjectSP();
+
+ if (idx == 0)
+ return valobj_sp->GetChildMemberWithName(ConstString("_M_ptr"), true);
+ else
+ return lldb::ValueObjectSP();
+}
+
+bool LibStdcppSharedPtrSyntheticFrontEnd::Update() { return false; }
+
+bool LibStdcppSharedPtrSyntheticFrontEnd::MightHaveChildren() { return true; }
+
+size_t LibStdcppSharedPtrSyntheticFrontEnd::GetIndexOfChildWithName(
+ const ConstString &name) {
+ if (name == ConstString("_M_ptr"))
+ return 0;
+ return UINT32_MAX;
+}
+
+SyntheticChildrenFrontEnd *
+lldb_private::formatters::LibStdcppSharedPtrSyntheticFrontEndCreator(
+ CXXSyntheticChildren *, lldb::ValueObjectSP valobj_sp) {
+ return (valobj_sp ? new LibStdcppSharedPtrSyntheticFrontEnd(valobj_sp)
+ : nullptr);
+}
+
+bool lldb_private::formatters::LibStdcppSmartPointerSummaryProvider(
+ ValueObject &valobj, Stream &stream, const TypeSummaryOptions &options) {
+ ValueObjectSP valobj_sp(valobj.GetNonSyntheticValue());
+ if (!valobj_sp)
+ return false;
+
+ ValueObjectSP ptr_sp(
+ valobj_sp->GetChildMemberWithName(ConstString("_M_ptr"), true));
+ if (!ptr_sp)
+ return false;
+
+ ValueObjectSP usecount_sp(valobj_sp->GetChildAtNamePath(
+ {ConstString("_M_refcount"), ConstString("_M_pi"),
+ ConstString("_M_use_count")}));
+ if (!usecount_sp)
+ return false;
+
+ if (ptr_sp->GetValueAsUnsigned(0) == 0 ||
+ usecount_sp->GetValueAsUnsigned(0) == 0) {
+ stream.Printf("nullptr");
+ return true;
+ }
+
+ Error error;
+ ValueObjectSP pointee_sp = ptr_sp->Dereference(error);
+ if (pointee_sp && error.Success()) {
+ if (pointee_sp->DumpPrintableRepresentation(
+ stream, ValueObject::eValueObjectRepresentationStyleSummary,
+ lldb::eFormatInvalid,
+ ValueObject::ePrintableRepresentationSpecialCasesDisable, false)) {
+ return true;
+ }
+ }
+
+ stream.Printf("ptr = 0x%" PRIx64, ptr_sp->GetValueAsUnsigned(0));
+ return true;
+}