57ee306789
A long time ago we start with clang types that were created by the symbol files and there were many functions in lldb_private::ClangASTContext that helped. Later we create ClangASTType which contains a clang::ASTContext and an opauque QualType, but we didn't switch over to fully using it. There were a lot of places where we would pass around a raw clang_type_t and also pass along a clang::ASTContext separately. This left room for error. This checkin change all type code over to use ClangASTType everywhere and I cleaned up the interfaces quite a bit. Any code that was in ClangASTContext that was type related, was moved over into ClangASTType. All code that used these types was switched over to use all of the new goodness. llvm-svn: 186130
237 lines
9.3 KiB
C++
237 lines
9.3 KiB
C++
//===-- ValueObjectConstResultImpl.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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#include "lldb/Core/ValueObjectConstResultImpl.h"
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#include "lldb/Core/ValueObjectChild.h"
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#include "lldb/Core/ValueObjectConstResult.h"
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#include "lldb/Core/ValueObjectConstResultChild.h"
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#include "lldb/Core/ValueObjectMemory.h"
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#include "lldb/Core/DataExtractor.h"
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#include "lldb/Core/Module.h"
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#include "lldb/Core/ValueObjectList.h"
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#include "lldb/Symbol/ClangASTType.h"
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#include "lldb/Symbol/ObjectFile.h"
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#include "lldb/Symbol/SymbolContext.h"
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#include "lldb/Symbol/Type.h"
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#include "lldb/Symbol/Variable.h"
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#include "lldb/Target/ExecutionContext.h"
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#include "lldb/Target/Process.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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// this macro enables a simpler implementation for some method calls in this object that relies only upon
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// ValueObject knowning how to set the address type of its children correctly. the alternative implementation
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// relies on being able to create a target copy of the frozen object, which makes it less bug-prone but less
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// efficient as well. once we are confident the faster implementation is bug-free, this macro (and the slower
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// implementations) can go
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#define TRIVIAL_IMPL 1
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ValueObjectConstResultImpl::ValueObjectConstResultImpl (ValueObject* valobj,
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lldb::addr_t live_address) :
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m_impl_backend(valobj),
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m_live_address(live_address),
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m_live_address_type(eAddressTypeLoad),
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m_load_addr_backend(),
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m_address_of_backend()
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{
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}
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lldb::ValueObjectSP
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ValueObjectConstResultImpl::DerefOnTarget()
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{
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if (m_load_addr_backend.get() == NULL)
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{
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lldb::addr_t tgt_address = m_impl_backend->GetPointerValue();
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ExecutionContext exe_ctx (m_impl_backend->GetExecutionContextRef());
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m_load_addr_backend = ValueObjectConstResult::Create (exe_ctx.GetBestExecutionContextScope(),
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m_impl_backend->GetClangType(),
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m_impl_backend->GetName(),
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tgt_address,
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eAddressTypeLoad,
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exe_ctx.GetAddressByteSize());
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}
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return m_load_addr_backend;
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}
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lldb::ValueObjectSP
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ValueObjectConstResultImpl::Dereference (Error &error)
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{
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if (m_impl_backend == NULL)
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return lldb::ValueObjectSP();
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#if defined (TRIVIAL_IMPL) && TRIVIAL_IMPL == 1
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return m_impl_backend->ValueObject::Dereference(error);
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#else
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m_impl_backend->UpdateValueIfNeeded(false);
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if (NeedsDerefOnTarget())
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return DerefOnTarget()->Dereference(error);
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else
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return m_impl_backend->ValueObject::Dereference(error);
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#endif
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}
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ValueObject *
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ValueObjectConstResultImpl::CreateChildAtIndex (size_t idx, bool synthetic_array_member, int32_t synthetic_index)
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{
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if (m_impl_backend == NULL)
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return NULL;
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m_impl_backend->UpdateValueIfNeeded(false);
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ValueObjectConstResultChild *valobj = NULL;
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bool omit_empty_base_classes = true;
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bool ignore_array_bounds = synthetic_array_member;
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std::string child_name_str;
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uint32_t child_byte_size = 0;
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int32_t child_byte_offset = 0;
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uint32_t child_bitfield_bit_size = 0;
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uint32_t child_bitfield_bit_offset = 0;
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bool child_is_base_class = false;
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bool child_is_deref_of_parent = false;
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const bool transparent_pointers = synthetic_array_member == false;
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ClangASTType clang_type = m_impl_backend->GetClangType();
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ClangASTType child_clang_type;
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ExecutionContext exe_ctx (m_impl_backend->GetExecutionContextRef());
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child_clang_type = clang_type.GetChildClangTypeAtIndex (&exe_ctx,
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m_impl_backend->GetName().GetCString(),
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idx,
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transparent_pointers,
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omit_empty_base_classes,
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ignore_array_bounds,
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child_name_str,
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child_byte_size,
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child_byte_offset,
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child_bitfield_bit_size,
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child_bitfield_bit_offset,
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child_is_base_class,
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child_is_deref_of_parent);
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if (child_clang_type && child_byte_size)
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{
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if (synthetic_index)
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child_byte_offset += child_byte_size * synthetic_index;
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ConstString child_name;
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if (!child_name_str.empty())
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child_name.SetCString (child_name_str.c_str());
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valobj = new ValueObjectConstResultChild (*m_impl_backend,
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child_clang_type,
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child_name,
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child_byte_size,
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child_byte_offset,
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child_bitfield_bit_size,
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child_bitfield_bit_offset,
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child_is_base_class,
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child_is_deref_of_parent);
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valobj->m_impl.SetLiveAddress(m_live_address+child_byte_offset);
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}
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return valobj;
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}
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lldb::ValueObjectSP
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ValueObjectConstResultImpl::GetSyntheticChildAtOffset (uint32_t offset, const ClangASTType& type, bool can_create)
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{
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if (m_impl_backend == NULL)
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return lldb::ValueObjectSP();
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#if defined (TRIVIAL_IMPL) && TRIVIAL_IMPL == 1
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return m_impl_backend->ValueObject::GetSyntheticChildAtOffset(offset, type, can_create);
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#else
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m_impl_backend->UpdateValueIfNeeded(false);
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if (NeedsDerefOnTarget())
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return DerefOnTarget()->GetSyntheticChildAtOffset(offset, type, can_create);
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else
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return m_impl_backend->ValueObject::GetSyntheticChildAtOffset(offset, type, can_create);
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#endif
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}
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lldb::ValueObjectSP
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ValueObjectConstResultImpl::AddressOf (Error &error)
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{
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if (m_address_of_backend.get() != NULL)
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return m_address_of_backend;
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if (m_impl_backend == NULL)
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return lldb::ValueObjectSP();
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if (m_live_address != LLDB_INVALID_ADDRESS)
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{
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ClangASTType clang_type(m_impl_backend->GetClangType());
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lldb::DataBufferSP buffer(new lldb_private::DataBufferHeap(&m_live_address,sizeof(lldb::addr_t)));
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std::string new_name("&");
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new_name.append(m_impl_backend->GetName().AsCString(""));
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ExecutionContext exe_ctx (m_impl_backend->GetExecutionContextRef());
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m_address_of_backend = ValueObjectConstResult::Create (exe_ctx.GetBestExecutionContextScope(),
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clang_type.GetPointerType(),
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ConstString(new_name.c_str()),
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buffer,
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lldb::endian::InlHostByteOrder(),
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exe_ctx.GetAddressByteSize());
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m_address_of_backend->GetValue().SetValueType(Value::eValueTypeScalar);
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m_address_of_backend->GetValue().GetScalar() = m_live_address;
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return m_address_of_backend;
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}
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else
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return lldb::ValueObjectSP();
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}
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lldb::addr_t
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ValueObjectConstResultImpl::GetAddressOf (bool scalar_is_load_address,
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AddressType *address_type)
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{
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if (m_impl_backend == NULL)
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return 0;
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if (m_live_address == LLDB_INVALID_ADDRESS)
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{
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return m_impl_backend->ValueObject::GetAddressOf (scalar_is_load_address,
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address_type);
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}
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if (address_type)
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*address_type = m_live_address_type;
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return m_live_address;
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}
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size_t
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ValueObjectConstResultImpl::GetPointeeData (DataExtractor& data,
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uint32_t item_idx,
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uint32_t item_count)
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{
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if (m_impl_backend == NULL)
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return 0;
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#if defined (TRIVIAL_IMPL) && TRIVIAL_IMPL == 1
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return m_impl_backend->ValueObject::GetPointeeData(data, item_idx, item_count);
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#else
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m_impl_backend->UpdateValueIfNeeded(false);
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if (NeedsDerefOnTarget() && m_impl_backend->IsPointerType())
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return DerefOnTarget()->GetPointeeData(data, item_idx, item_count);
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else
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return m_impl_backend->ValueObject::GetPointeeData(data, item_idx, item_count);
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#endif
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}
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