| //===-- ValueObjectMemory.cpp ---------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "lldb/Core/ValueObjectMemory.h" |
| #include "lldb/Core/Value.h" |
| #include "lldb/Core/ValueObject.h" |
| #include "lldb/Symbol/Type.h" |
| #include "lldb/Target/ExecutionContext.h" |
| #include "lldb/Target/Target.h" |
| #include "lldb/Utility/DataExtractor.h" |
| #include "lldb/Utility/Scalar.h" |
| #include "lldb/Utility/Status.h" |
| #include "lldb/lldb-types.h" |
| #include "llvm/Support/ErrorHandling.h" |
| |
| #include <cassert> |
| #include <memory> |
| |
| namespace lldb_private { |
| class ExecutionContextScope; |
| } |
| |
| using namespace lldb; |
| using namespace lldb_private; |
| |
| ValueObjectSP ValueObjectMemory::Create(ExecutionContextScope *exe_scope, |
| llvm::StringRef name, |
| const Address &address, |
| lldb::TypeSP &type_sp) { |
| auto manager_sp = ValueObjectManager::Create(); |
| return (new ValueObjectMemory(exe_scope, *manager_sp, name, address, type_sp)) |
| ->GetSP(); |
| } |
| |
| ValueObjectSP ValueObjectMemory::Create(ExecutionContextScope *exe_scope, |
| llvm::StringRef name, |
| const Address &address, |
| const CompilerType &ast_type) { |
| auto manager_sp = ValueObjectManager::Create(); |
| return (new ValueObjectMemory(exe_scope, *manager_sp, name, address, |
| ast_type)) |
| ->GetSP(); |
| } |
| |
| ValueObjectMemory::ValueObjectMemory(ExecutionContextScope *exe_scope, |
| ValueObjectManager &manager, |
| llvm::StringRef name, |
| const Address &address, |
| lldb::TypeSP &type_sp) |
| : ValueObject(exe_scope, manager), m_address(address), m_type_sp(type_sp), |
| m_compiler_type() { |
| // Do not attempt to construct one of these objects with no variable! |
| assert(m_type_sp.get() != nullptr); |
| SetName(ConstString(name)); |
| m_value.SetContext(Value::ContextType::LLDBType, m_type_sp.get()); |
| TargetSP target_sp(GetTargetSP()); |
| lldb::addr_t load_address = m_address.GetLoadAddress(target_sp.get()); |
| if (load_address != LLDB_INVALID_ADDRESS) { |
| m_value.SetValueType(Value::ValueType::LoadAddress); |
| m_value.GetScalar() = load_address; |
| } else { |
| lldb::addr_t file_address = m_address.GetFileAddress(); |
| if (file_address != LLDB_INVALID_ADDRESS) { |
| m_value.SetValueType(Value::ValueType::FileAddress); |
| m_value.GetScalar() = file_address; |
| } else { |
| m_value.GetScalar() = m_address.GetOffset(); |
| m_value.SetValueType(Value::ValueType::Scalar); |
| } |
| } |
| } |
| |
| ValueObjectMemory::ValueObjectMemory(ExecutionContextScope *exe_scope, |
| ValueObjectManager &manager, |
| llvm::StringRef name, |
| const Address &address, |
| const CompilerType &ast_type) |
| : ValueObject(exe_scope, manager), m_address(address), m_type_sp(), |
| m_compiler_type(ast_type) { |
| // Do not attempt to construct one of these objects with no variable! |
| assert(m_compiler_type.GetTypeSystem()); |
| assert(m_compiler_type.GetOpaqueQualType()); |
| |
| TargetSP target_sp(GetTargetSP()); |
| |
| SetName(ConstString(name)); |
| m_value.SetCompilerType(m_compiler_type); |
| lldb::addr_t load_address = m_address.GetLoadAddress(target_sp.get()); |
| if (load_address != LLDB_INVALID_ADDRESS) { |
| m_value.SetValueType(Value::ValueType::LoadAddress); |
| m_value.GetScalar() = load_address; |
| } else { |
| lldb::addr_t file_address = m_address.GetFileAddress(); |
| if (file_address != LLDB_INVALID_ADDRESS) { |
| m_value.SetValueType(Value::ValueType::FileAddress); |
| m_value.GetScalar() = file_address; |
| } else { |
| m_value.GetScalar() = m_address.GetOffset(); |
| m_value.SetValueType(Value::ValueType::Scalar); |
| } |
| } |
| } |
| |
| ValueObjectMemory::~ValueObjectMemory() = default; |
| |
| CompilerType ValueObjectMemory::GetCompilerTypeImpl() { |
| if (m_type_sp) |
| return m_type_sp->GetForwardCompilerType(); |
| return m_compiler_type; |
| } |
| |
| ConstString ValueObjectMemory::GetTypeName() { |
| if (m_type_sp) |
| return m_type_sp->GetName(); |
| return m_compiler_type.GetTypeName(); |
| } |
| |
| ConstString ValueObjectMemory::GetDisplayTypeName() { |
| if (m_type_sp) |
| return m_type_sp->GetForwardCompilerType().GetDisplayTypeName(); |
| return m_compiler_type.GetDisplayTypeName(); |
| } |
| |
| size_t ValueObjectMemory::CalculateNumChildren(uint32_t max) { |
| if (m_type_sp) { |
| auto child_count = m_type_sp->GetNumChildren(true); |
| return child_count <= max ? child_count : max; |
| } |
| |
| ExecutionContext exe_ctx(GetExecutionContextRef()); |
| const bool omit_empty_base_classes = true; |
| auto child_count = |
| m_compiler_type.GetNumChildren(omit_empty_base_classes, &exe_ctx); |
| return child_count <= max ? child_count : max; |
| } |
| |
| llvm::Optional<uint64_t> ValueObjectMemory::GetByteSize() { |
| ExecutionContext exe_ctx(GetExecutionContextRef()); |
| if (m_type_sp) |
| return m_type_sp->GetByteSize(exe_ctx.GetBestExecutionContextScope()); |
| return m_compiler_type.GetByteSize(exe_ctx.GetBestExecutionContextScope()); |
| } |
| |
| lldb::ValueType ValueObjectMemory::GetValueType() const { |
| // RETHINK: Should this be inherited from somewhere? |
| return lldb::eValueTypeVariableGlobal; |
| } |
| |
| bool ValueObjectMemory::UpdateValue() { |
| SetValueIsValid(false); |
| m_error.Clear(); |
| |
| ExecutionContext exe_ctx(GetExecutionContextRef()); |
| |
| Target *target = exe_ctx.GetTargetPtr(); |
| if (target) { |
| m_data.SetByteOrder(target->GetArchitecture().GetByteOrder()); |
| m_data.SetAddressByteSize(target->GetArchitecture().GetAddressByteSize()); |
| } |
| |
| Value old_value(m_value); |
| if (m_address.IsValid()) { |
| Value::ValueType value_type = m_value.GetValueType(); |
| |
| switch (value_type) { |
| case Value::ValueType::Invalid: |
| m_error.SetErrorString("Invalid value"); |
| return false; |
| case Value::ValueType::Scalar: |
| // The variable value is in the Scalar value inside the m_value. We can |
| // point our m_data right to it. |
| m_error = m_value.GetValueAsData(&exe_ctx, m_data, GetModule().get()); |
| break; |
| |
| case Value::ValueType::FileAddress: |
| case Value::ValueType::LoadAddress: |
| case Value::ValueType::HostAddress: |
| // The DWARF expression result was an address in the inferior process. If |
| // this variable is an aggregate type, we just need the address as the |
| // main value as all child variable objects will rely upon this location |
| // and add an offset and then read their own values as needed. If this |
| // variable is a simple type, we read all data for it into m_data. Make |
| // sure this type has a value before we try and read it |
| |
| // If we have a file address, convert it to a load address if we can. |
| if (value_type == Value::ValueType::FileAddress && |
| exe_ctx.GetProcessPtr()) { |
| lldb::addr_t load_addr = m_address.GetLoadAddress(target); |
| if (load_addr != LLDB_INVALID_ADDRESS) { |
| m_value.SetValueType(Value::ValueType::LoadAddress); |
| m_value.GetScalar() = load_addr; |
| } |
| } |
| |
| if (!CanProvideValue()) { |
| // this value object represents an aggregate type whose children have |
| // values, but this object does not. So we say we are changed if our |
| // location has changed. |
| SetValueDidChange(value_type != old_value.GetValueType() || |
| m_value.GetScalar() != old_value.GetScalar()); |
| } else { |
| // Copy the Value and set the context to use our Variable so it can |
| // extract read its value into m_data appropriately |
| Value value(m_value); |
| if (m_type_sp) |
| value.SetContext(Value::ContextType::LLDBType, m_type_sp.get()); |
| else { |
| value.SetCompilerType(m_compiler_type); |
| } |
| |
| m_error = value.GetValueAsData(&exe_ctx, m_data, GetModule().get()); |
| } |
| break; |
| } |
| |
| SetValueIsValid(m_error.Success()); |
| } |
| return m_error.Success(); |
| } |
| |
| bool ValueObjectMemory::IsInScope() { |
| // FIXME: Maybe try to read the memory address, and if that works, then |
| // we are in scope? |
| return true; |
| } |
| |
| lldb::ModuleSP ValueObjectMemory::GetModule() { return m_address.GetModule(); } |