forked from OSchip/llvm-project
243 lines
9.8 KiB
C++
243 lines
9.8 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->GetClangAST(),
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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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clang::ASTContext *clang_ast = m_impl_backend->GetClangAST();
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lldb::clang_type_t clang_type = m_impl_backend->GetClangType();
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lldb::clang_type_t child_clang_type;
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ExecutionContext exe_ctx (m_impl_backend->GetExecutionContextRef());
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child_clang_type = ClangASTContext::GetChildClangTypeAtIndex (&exe_ctx,
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clang_ast,
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m_impl_backend->GetName().GetCString(),
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clang_type,
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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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clang_ast,
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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 type(m_impl_backend->GetClangAST(), 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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type.GetASTContext(),
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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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