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Diffstat (limited to 'source/Core/ValueObjectConstResultImpl.cpp')
| -rw-r--r-- | source/Core/ValueObjectConstResultImpl.cpp | 236 |
1 files changed, 236 insertions, 0 deletions
diff --git a/source/Core/ValueObjectConstResultImpl.cpp b/source/Core/ValueObjectConstResultImpl.cpp new file mode 100644 index 000000000000..e0757f60cdba --- /dev/null +++ b/source/Core/ValueObjectConstResultImpl.cpp @@ -0,0 +1,236 @@ +//===-- ValueObjectConstResultImpl.cpp ---------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#include "lldb/Core/ValueObjectConstResultImpl.h" + +#include "lldb/Core/ValueObjectChild.h" +#include "lldb/Core/ValueObjectConstResult.h" +#include "lldb/Core/ValueObjectConstResultChild.h" +#include "lldb/Core/ValueObjectMemory.h" +#include "lldb/Core/DataExtractor.h" +#include "lldb/Core/Module.h" +#include "lldb/Core/ValueObjectList.h" + +#include "lldb/Symbol/ClangASTType.h" +#include "lldb/Symbol/ObjectFile.h" +#include "lldb/Symbol/SymbolContext.h" +#include "lldb/Symbol/Type.h" +#include "lldb/Symbol/Variable.h" + +#include "lldb/Target/ExecutionContext.h" +#include "lldb/Target/Process.h" +#include "lldb/Target/Target.h" + +using namespace lldb; +using namespace lldb_private; + +// this macro enables a simpler implementation for some method calls in this object that relies only upon +// ValueObject knowning how to set the address type of its children correctly. the alternative implementation +// relies on being able to create a target copy of the frozen object, which makes it less bug-prone but less +// efficient as well. once we are confident the faster implementation is bug-free, this macro (and the slower +// implementations) can go +#define TRIVIAL_IMPL 1 + +ValueObjectConstResultImpl::ValueObjectConstResultImpl (ValueObject* valobj, + lldb::addr_t live_address) : + m_impl_backend(valobj), + m_live_address(live_address), + m_live_address_type(eAddressTypeLoad), + m_load_addr_backend(), + m_address_of_backend() +{ +} + +lldb::ValueObjectSP +ValueObjectConstResultImpl::DerefOnTarget() +{ + if (m_load_addr_backend.get() == NULL) + { + lldb::addr_t tgt_address = m_impl_backend->GetPointerValue(); + ExecutionContext exe_ctx (m_impl_backend->GetExecutionContextRef()); + m_load_addr_backend = ValueObjectConstResult::Create (exe_ctx.GetBestExecutionContextScope(), + m_impl_backend->GetClangType(), + m_impl_backend->GetName(), + tgt_address, + eAddressTypeLoad, + exe_ctx.GetAddressByteSize()); + } + return m_load_addr_backend; +} + +lldb::ValueObjectSP +ValueObjectConstResultImpl::Dereference (Error &error) +{ + if (m_impl_backend == NULL) + return lldb::ValueObjectSP(); + +#if defined (TRIVIAL_IMPL) && TRIVIAL_IMPL == 1 + return m_impl_backend->ValueObject::Dereference(error); +#else + m_impl_backend->UpdateValueIfNeeded(false); + + if (NeedsDerefOnTarget()) + return DerefOnTarget()->Dereference(error); + else + return m_impl_backend->ValueObject::Dereference(error); +#endif +} + +ValueObject * +ValueObjectConstResultImpl::CreateChildAtIndex (size_t idx, bool synthetic_array_member, int32_t synthetic_index) +{ + if (m_impl_backend == NULL) + return NULL; + + m_impl_backend->UpdateValueIfNeeded(false); + + ValueObjectConstResultChild *valobj = NULL; + + bool omit_empty_base_classes = true; + bool ignore_array_bounds = synthetic_array_member; + std::string child_name_str; + uint32_t child_byte_size = 0; + int32_t child_byte_offset = 0; + uint32_t child_bitfield_bit_size = 0; + uint32_t child_bitfield_bit_offset = 0; + bool child_is_base_class = false; + bool child_is_deref_of_parent = false; + + const bool transparent_pointers = synthetic_array_member == false; + ClangASTType clang_type = m_impl_backend->GetClangType(); + ClangASTType child_clang_type; + + ExecutionContext exe_ctx (m_impl_backend->GetExecutionContextRef()); + + child_clang_type = clang_type.GetChildClangTypeAtIndex (&exe_ctx, + m_impl_backend->GetName().GetCString(), + idx, + transparent_pointers, + omit_empty_base_classes, + ignore_array_bounds, + child_name_str, + child_byte_size, + child_byte_offset, + child_bitfield_bit_size, + child_bitfield_bit_offset, + child_is_base_class, + child_is_deref_of_parent); + if (child_clang_type && child_byte_size) + { + if (synthetic_index) + child_byte_offset += child_byte_size * synthetic_index; + + ConstString child_name; + if (!child_name_str.empty()) + child_name.SetCString (child_name_str.c_str()); + + valobj = new ValueObjectConstResultChild (*m_impl_backend, + child_clang_type, + child_name, + child_byte_size, + child_byte_offset, + child_bitfield_bit_size, + child_bitfield_bit_offset, + child_is_base_class, + child_is_deref_of_parent); + valobj->m_impl.SetLiveAddress(m_live_address+child_byte_offset); + } + + return valobj; +} + +lldb::ValueObjectSP +ValueObjectConstResultImpl::GetSyntheticChildAtOffset (uint32_t offset, const ClangASTType& type, bool can_create) +{ + if (m_impl_backend == NULL) + return lldb::ValueObjectSP(); + +#if defined (TRIVIAL_IMPL) && TRIVIAL_IMPL == 1 + return m_impl_backend->ValueObject::GetSyntheticChildAtOffset(offset, type, can_create); +#else + m_impl_backend->UpdateValueIfNeeded(false); + + if (NeedsDerefOnTarget()) + return DerefOnTarget()->GetSyntheticChildAtOffset(offset, type, can_create); + else + return m_impl_backend->ValueObject::GetSyntheticChildAtOffset(offset, type, can_create); +#endif +} + +lldb::ValueObjectSP +ValueObjectConstResultImpl::AddressOf (Error &error) +{ + if (m_address_of_backend.get() != NULL) + return m_address_of_backend; + + if (m_impl_backend == NULL) + return lldb::ValueObjectSP(); + if (m_live_address != LLDB_INVALID_ADDRESS) + { + ClangASTType clang_type(m_impl_backend->GetClangType()); + + lldb::DataBufferSP buffer(new lldb_private::DataBufferHeap(&m_live_address,sizeof(lldb::addr_t))); + + std::string new_name("&"); + new_name.append(m_impl_backend->GetName().AsCString("")); + ExecutionContext exe_ctx (m_impl_backend->GetExecutionContextRef()); + m_address_of_backend = ValueObjectConstResult::Create (exe_ctx.GetBestExecutionContextScope(), + clang_type.GetPointerType(), + ConstString(new_name.c_str()), + buffer, + lldb::endian::InlHostByteOrder(), + exe_ctx.GetAddressByteSize()); + + m_address_of_backend->GetValue().SetValueType(Value::eValueTypeScalar); + m_address_of_backend->GetValue().GetScalar() = m_live_address; + + return m_address_of_backend; + } + else + return lldb::ValueObjectSP(); +} + +lldb::addr_t +ValueObjectConstResultImpl::GetAddressOf (bool scalar_is_load_address, + AddressType *address_type) +{ + + if (m_impl_backend == NULL) + return 0; + + if (m_live_address == LLDB_INVALID_ADDRESS) + { + return m_impl_backend->ValueObject::GetAddressOf (scalar_is_load_address, + address_type); + } + + if (address_type) + *address_type = m_live_address_type; + + return m_live_address; +} + +size_t +ValueObjectConstResultImpl::GetPointeeData (DataExtractor& data, + uint32_t item_idx, + uint32_t item_count) +{ + if (m_impl_backend == NULL) + return 0; +#if defined (TRIVIAL_IMPL) && TRIVIAL_IMPL == 1 + return m_impl_backend->ValueObject::GetPointeeData(data, item_idx, item_count); +#else + m_impl_backend->UpdateValueIfNeeded(false); + + if (NeedsDerefOnTarget() && m_impl_backend->IsPointerType()) + return DerefOnTarget()->GetPointeeData(data, item_idx, item_count); + else + return m_impl_backend->ValueObject::GetPointeeData(data, item_idx, item_count); +#endif +} |