bf9a77305f
This moves the following classes from Core -> Utility. ConstString Error RegularExpression Stream StreamString The goal here is to get lldbUtility into a state where it has no dependendencies except on itself and LLVM, so it can be the starting point at which to start untangling LLDB's dependencies. These are all low level and very widely used classes, and previously lldbUtility had dependencies up to lldbCore in order to use these classes. So moving then down to lldbUtility makes sense from both the short term and long term perspective in solving this problem. Differential Revision: https://reviews.llvm.org/D29427 llvm-svn: 293941
142 lines
4.3 KiB
C++
142 lines
4.3 KiB
C++
//===-- LibCxxVector.cpp ----------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// C Includes
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// C++ Includes
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// Other libraries and framework includes
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// Project includes
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#include "LibCxx.h"
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#include "lldb/Core/ValueObject.h"
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#include "lldb/DataFormatters/FormattersHelpers.h"
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#include "lldb/Utility/ConstString.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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namespace lldb_private {
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namespace formatters {
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class LibcxxStdVectorSyntheticFrontEnd : public SyntheticChildrenFrontEnd {
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public:
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LibcxxStdVectorSyntheticFrontEnd(lldb::ValueObjectSP valobj_sp);
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~LibcxxStdVectorSyntheticFrontEnd() override;
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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(const ConstString &name) override;
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private:
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ValueObject *m_start;
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ValueObject *m_finish;
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CompilerType m_element_type;
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uint32_t m_element_size;
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};
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} // namespace formatters
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} // namespace lldb_private
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lldb_private::formatters::LibcxxStdVectorSyntheticFrontEnd::
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LibcxxStdVectorSyntheticFrontEnd(lldb::ValueObjectSP valobj_sp)
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: SyntheticChildrenFrontEnd(*valobj_sp), m_start(nullptr),
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m_finish(nullptr), m_element_type(), m_element_size(0) {
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if (valobj_sp)
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Update();
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}
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lldb_private::formatters::LibcxxStdVectorSyntheticFrontEnd::
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~LibcxxStdVectorSyntheticFrontEnd() {
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// these need to stay around because they are child objects who will follow
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// their parent's life cycle
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// delete m_start;
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// delete m_finish;
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}
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size_t lldb_private::formatters::LibcxxStdVectorSyntheticFrontEnd::
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CalculateNumChildren() {
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if (!m_start || !m_finish)
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return 0;
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uint64_t start_val = m_start->GetValueAsUnsigned(0);
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uint64_t finish_val = m_finish->GetValueAsUnsigned(0);
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if (start_val == 0 || finish_val == 0)
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return 0;
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if (start_val >= finish_val)
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return 0;
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size_t num_children = (finish_val - start_val);
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if (num_children % m_element_size)
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return 0;
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return num_children / m_element_size;
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}
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lldb::ValueObjectSP
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lldb_private::formatters::LibcxxStdVectorSyntheticFrontEnd::GetChildAtIndex(
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size_t idx) {
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if (!m_start || !m_finish)
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return lldb::ValueObjectSP();
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uint64_t offset = idx * m_element_size;
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offset = offset + m_start->GetValueAsUnsigned(0);
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StreamString name;
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name.Printf("[%" PRIu64 "]", (uint64_t)idx);
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return CreateValueObjectFromAddress(name.GetString(), offset,
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m_backend.GetExecutionContextRef(),
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m_element_type);
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}
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bool lldb_private::formatters::LibcxxStdVectorSyntheticFrontEnd::Update() {
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m_start = m_finish = nullptr;
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ValueObjectSP data_type_finder_sp(
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m_backend.GetChildMemberWithName(ConstString("__end_cap_"), true));
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if (!data_type_finder_sp)
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return false;
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data_type_finder_sp = data_type_finder_sp->GetChildMemberWithName(
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ConstString("__first_"), true);
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if (!data_type_finder_sp)
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return false;
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m_element_type = data_type_finder_sp->GetCompilerType().GetPointeeType();
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m_element_size = m_element_type.GetByteSize(nullptr);
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if (m_element_size > 0) {
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// store raw pointers or end up with a circular dependency
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m_start =
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m_backend.GetChildMemberWithName(ConstString("__begin_"), true).get();
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m_finish =
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m_backend.GetChildMemberWithName(ConstString("__end_"), true).get();
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}
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return false;
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}
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bool lldb_private::formatters::LibcxxStdVectorSyntheticFrontEnd::
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MightHaveChildren() {
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return true;
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}
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size_t lldb_private::formatters::LibcxxStdVectorSyntheticFrontEnd::
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GetIndexOfChildWithName(const ConstString &name) {
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if (!m_start || !m_finish)
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return UINT32_MAX;
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return ExtractIndexFromString(name.GetCString());
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}
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lldb_private::SyntheticChildrenFrontEnd *
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lldb_private::formatters::LibcxxStdVectorSyntheticFrontEndCreator(
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CXXSyntheticChildren *, lldb::ValueObjectSP valobj_sp) {
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return (valobj_sp ? new LibcxxStdVectorSyntheticFrontEnd(valobj_sp)
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: nullptr);
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}
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