808142876c
Summary: A *.cpp file header in LLDB (and in LLDB) should like this: ``` //===-- TestUtilities.cpp -------------------------------------------------===// ``` However in LLDB most of our source files have arbitrary changes to this format and these changes are spreading through LLDB as folks usually just use the existing source files as templates for their new files (most notably the unnecessary editor language indicator `-*- C++ -*-` is spreading and in every review someone is pointing out that this is wrong, resulting in people pointing out that this is done in the same way in other files). This patch removes most of these inconsistencies including the editor language indicators, all the different missing/additional '-' characters, files that center the file name, missing trailing `===//` (mostly caused by clang-format breaking the line). Reviewers: aprantl, espindola, jfb, shafik, JDevlieghere Reviewed By: JDevlieghere Subscribers: dexonsmith, wuzish, emaste, sdardis, nemanjai, kbarton, MaskRay, atanasyan, arphaman, jfb, abidh, jsji, JDevlieghere, usaxena95, lldb-commits Tags: #lldb Differential Revision: https://reviews.llvm.org/D73258
121 lines
4.1 KiB
C++
121 lines
4.1 KiB
C++
//===-- LibCxxBitset.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 "LibCxx.h"
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#include "lldb/DataFormatters/FormattersHelpers.h"
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#include "lldb/Symbol/TypeSystemClang.h"
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#include "lldb/Target/Target.h"
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using namespace lldb;
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using namespace lldb_private;
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namespace {
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class BitsetFrontEnd : public SyntheticChildrenFrontEnd {
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public:
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BitsetFrontEnd(ValueObject &valobj);
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size_t GetIndexOfChildWithName(ConstString name) override {
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return formatters::ExtractIndexFromString(name.GetCString());
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}
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bool MightHaveChildren() override { return true; }
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bool Update() override;
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size_t CalculateNumChildren() override { return m_elements.size(); }
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ValueObjectSP GetChildAtIndex(size_t idx) override;
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private:
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// The lifetime of a ValueObject and all its derivative ValueObjects
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// (children, clones, etc.) is managed by a ClusterManager. These
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// objects are only destroyed when every shared pointer to any of them
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// is destroyed, so we must not store a shared pointer to any ValueObject
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// derived from our backend ValueObject (since we're in the same cluster).
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// Value objects created from raw data (i.e. in a different cluster) must
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// be referenced via shared pointer to keep them alive, however.
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std::vector<ValueObjectSP> m_elements;
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ValueObject* m_first = nullptr;
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CompilerType m_bool_type;
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ByteOrder m_byte_order = eByteOrderInvalid;
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uint8_t m_byte_size = 0;
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};
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} // namespace
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BitsetFrontEnd::BitsetFrontEnd(ValueObject &valobj)
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: SyntheticChildrenFrontEnd(valobj) {
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m_bool_type = valobj.GetCompilerType().GetBasicTypeFromAST(eBasicTypeBool);
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if (auto target_sp = m_backend.GetTargetSP()) {
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m_byte_order = target_sp->GetArchitecture().GetByteOrder();
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m_byte_size = target_sp->GetArchitecture().GetAddressByteSize();
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Update();
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}
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}
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bool BitsetFrontEnd::Update() {
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m_elements.clear();
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m_first = nullptr;
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TargetSP target_sp = m_backend.GetTargetSP();
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if (!target_sp)
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return false;
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size_t capping_size = target_sp->GetMaximumNumberOfChildrenToDisplay();
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size_t size = 0;
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if (auto arg = m_backend.GetCompilerType().GetIntegralTemplateArgument(0))
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size = arg->value.getLimitedValue(capping_size);
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m_elements.assign(size, ValueObjectSP());
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m_first = m_backend.GetChildMemberWithName(ConstString("__first_"), true).get();
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return false;
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}
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ValueObjectSP BitsetFrontEnd::GetChildAtIndex(size_t idx) {
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if (idx >= m_elements.size() || !m_first)
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return ValueObjectSP();
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if (m_elements[idx])
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return m_elements[idx];
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ExecutionContext ctx = m_backend.GetExecutionContextRef().Lock(false);
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CompilerType type;
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ValueObjectSP chunk;
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// For small bitsets __first_ is not an array, but a plain size_t.
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if (m_first->GetCompilerType().IsArrayType(&type, nullptr, nullptr)) {
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llvm::Optional<uint64_t> bit_size =
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type.GetBitSize(ctx.GetBestExecutionContextScope());
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if (!bit_size || *bit_size == 0)
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return {};
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chunk = m_first->GetChildAtIndex(idx / *bit_size, true);
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} else {
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type = m_first->GetCompilerType();
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chunk = m_first->GetSP();
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}
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if (!type || !chunk)
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return {};
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llvm::Optional<uint64_t> bit_size =
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type.GetBitSize(ctx.GetBestExecutionContextScope());
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if (!bit_size || *bit_size == 0)
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return {};
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size_t chunk_idx = idx % *bit_size;
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uint8_t value = !!(chunk->GetValueAsUnsigned(0) & (uint64_t(1) << chunk_idx));
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DataExtractor data(&value, sizeof(value), m_byte_order, m_byte_size);
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m_elements[idx] = CreateValueObjectFromData(llvm::formatv("[{0}]", idx).str(),
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data, ctx, m_bool_type);
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return m_elements[idx];
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}
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SyntheticChildrenFrontEnd *formatters::LibcxxBitsetSyntheticFrontEndCreator(
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CXXSyntheticChildren *, lldb::ValueObjectSP valobj_sp) {
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if (valobj_sp)
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return new BitsetFrontEnd(*valobj_sp);
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return nullptr;
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}
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