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28c878aeb2
Applied modernize-use-default-member-init clang-tidy check over LLDB. It appears in many files we had already switched to in class member init but never updated the constructors to reflect that. This check is already present in the lldb/.clang-tidy config. Differential Revision: https://reviews.llvm.org/D121481
152 lines
4.4 KiB
C++
152 lines
4.4 KiB
C++
//===-- LibCxxAtomic.cpp --------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "LibCxxAtomic.h"
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#include "lldb/DataFormatters/FormattersHelpers.h"
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using namespace lldb;
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using namespace lldb_private;
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using namespace lldb_private::formatters;
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//
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// We are supporting two versions of libc++ std::atomic
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//
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// Given std::atomic<int> i;
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//
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// The previous version of std::atomic was laid out like this
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//
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// (lldb) frame var -L -R i
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// 0x00007ffeefbff9a0: (std::__1::atomic<int>) i = {
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// 0x00007ffeefbff9a0: std::__1::__atomic_base<int, true> = {
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// 0x00007ffeefbff9a0: std::__1::__atomic_base<int, false> = {
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// 0x00007ffeefbff9a0: __a_ = 5
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// }
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// }
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// }
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//
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// In this case we need to obtain __a_ and the current version is laid out as so
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//
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// (lldb) frame var -L -R i
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// 0x00007ffeefbff9b0: (std::__1::atomic<int>) i = {
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// 0x00007ffeefbff9b0: std::__1::__atomic_base<int, true> = {
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// 0x00007ffeefbff9b0: std::__1::__atomic_base<int, false> = {
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// 0x00007ffeefbff9b0: __a_ = {
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// 0x00007ffeefbff9b0: std::__1::__cxx_atomic_base_impl<int> = {
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// 0x00007ffeefbff9b0: __a_value = 5
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// }
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// }
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// }
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// }
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//}
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//
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// In this case we need to obtain __a_value
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//
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// The below method covers both cases and returns the relevant member as a
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// ValueObjectSP
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//
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ValueObjectSP
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lldb_private::formatters::GetLibCxxAtomicValue(ValueObject &valobj) {
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ValueObjectSP non_sythetic = valobj.GetNonSyntheticValue();
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if (!non_sythetic)
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return {};
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ValueObjectSP member__a_ =
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non_sythetic->GetChildMemberWithName(ConstString("__a_"), true);
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if (!member__a_)
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return {};
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ValueObjectSP member__a_value =
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member__a_->GetChildMemberWithName(ConstString("__a_value"), true);
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if (!member__a_value)
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return member__a_;
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return member__a_value;
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}
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bool lldb_private::formatters::LibCxxAtomicSummaryProvider(
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ValueObject &valobj, Stream &stream, const TypeSummaryOptions &options) {
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if (ValueObjectSP atomic_value = GetLibCxxAtomicValue(valobj)) {
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std::string summary;
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if (atomic_value->GetSummaryAsCString(summary, options) &&
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summary.size() > 0) {
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stream.Printf("%s", summary.c_str());
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return true;
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}
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}
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return false;
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}
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namespace lldb_private {
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namespace formatters {
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class LibcxxStdAtomicSyntheticFrontEnd : public SyntheticChildrenFrontEnd {
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public:
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LibcxxStdAtomicSyntheticFrontEnd(lldb::ValueObjectSP valobj_sp);
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~LibcxxStdAtomicSyntheticFrontEnd() override = default;
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size_t CalculateNumChildren() override;
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lldb::ValueObjectSP GetChildAtIndex(size_t idx) override;
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bool Update() override;
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bool MightHaveChildren() override;
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size_t GetIndexOfChildWithName(ConstString name) override;
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private:
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ValueObject *m_real_child = nullptr;
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};
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} // namespace formatters
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} // namespace lldb_private
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lldb_private::formatters::LibcxxStdAtomicSyntheticFrontEnd::
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LibcxxStdAtomicSyntheticFrontEnd(lldb::ValueObjectSP valobj_sp)
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: SyntheticChildrenFrontEnd(*valobj_sp) {}
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bool lldb_private::formatters::LibcxxStdAtomicSyntheticFrontEnd::Update() {
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ValueObjectSP atomic_value = GetLibCxxAtomicValue(m_backend);
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if (atomic_value)
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m_real_child = GetLibCxxAtomicValue(m_backend).get();
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return false;
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}
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bool lldb_private::formatters::LibcxxStdAtomicSyntheticFrontEnd::
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MightHaveChildren() {
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return true;
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}
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size_t lldb_private::formatters::LibcxxStdAtomicSyntheticFrontEnd::
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CalculateNumChildren() {
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return m_real_child ? 1 : 0;
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}
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lldb::ValueObjectSP
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lldb_private::formatters::LibcxxStdAtomicSyntheticFrontEnd::GetChildAtIndex(
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size_t idx) {
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if (idx == 0)
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return m_real_child->GetSP()->Clone(ConstString("Value"));
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return nullptr;
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}
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size_t lldb_private::formatters::LibcxxStdAtomicSyntheticFrontEnd::
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GetIndexOfChildWithName(ConstString name) {
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return formatters::ExtractIndexFromString(name.GetCString());
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}
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SyntheticChildrenFrontEnd *
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lldb_private::formatters::LibcxxAtomicSyntheticFrontEndCreator(
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CXXSyntheticChildren *, lldb::ValueObjectSP valobj_sp) {
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if (valobj_sp)
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return new LibcxxStdAtomicSyntheticFrontEnd(valobj_sp);
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return nullptr;
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}
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