llvm-project/lldb/source/Core/ValueObjectCast.cpp

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//===-- ValueObjectCast.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/ValueObjectCast.h"
#include "lldb/Core/Value.h"
#include "lldb/Core/ValueObject.h"
#include "lldb/Symbol/CompilerType.h"
#include "lldb/Target/ExecutionContext.h"
#include "lldb/Utility/Scalar.h"
#include "lldb/Utility/Status.h"
namespace lldb_private {
class ConstString;
}
using namespace lldb_private;
lldb::ValueObjectSP ValueObjectCast::Create(ValueObject &parent,
ConstString name,
const CompilerType &cast_type) {
ValueObjectCast *cast_valobj_ptr =
new ValueObjectCast(parent, name, cast_type);
return cast_valobj_ptr->GetSP();
}
ValueObjectCast::ValueObjectCast(ValueObject &parent, ConstString name,
const CompilerType &cast_type)
: ValueObject(parent), m_cast_type(cast_type) {
SetName(name);
Final bit of type system cleanup that abstracts declaration contexts into lldb_private::CompilerDeclContext and renames ClangType to CompilerType in many accessors and functions. Create a new "lldb_private::CompilerDeclContext" class that will replace all direct uses of "clang::DeclContext" when used in compiler agnostic code, yet still allow for conversion to clang::DeclContext subclasses by clang specific code. This completes the abstraction of type parsing by removing all "clang::" references from the SymbolFileDWARF. The new "lldb_private::CompilerDeclContext" class abstracts decl contexts found in compiler type systems so they can be used in internal API calls. The TypeSystem is required to support CompilerDeclContexts with new pure virtual functions that start with "DeclContext" in the member function names. Converted all code that used lldb_private::ClangNamespaceDecl over to use the new CompilerDeclContext class and removed the ClangNamespaceDecl.cpp and ClangNamespaceDecl.h files. Removed direct use of clang APIs from SBType and now use the abstract type systems to correctly explore types. Bulk renames for things that used to return a ClangASTType which is now CompilerType: "Type::GetClangFullType()" to "Type::GetFullCompilerType()" "Type::GetClangLayoutType()" to "Type::GetLayoutCompilerType()" "Type::GetClangForwardType()" to "Type::GetForwardCompilerType()" "Value::GetClangType()" to "Value::GetCompilerType()" "Value::SetClangType (const CompilerType &)" to "Value::SetCompilerType (const CompilerType &)" "ValueObject::GetClangType ()" to "ValueObject::GetCompilerType()" many more renames that are similar. llvm-svn: 245905
2015-08-25 07:46:31 +08:00
m_value.SetCompilerType(cast_type);
}
ValueObjectCast::~ValueObjectCast() = default;
Final bit of type system cleanup that abstracts declaration contexts into lldb_private::CompilerDeclContext and renames ClangType to CompilerType in many accessors and functions. Create a new "lldb_private::CompilerDeclContext" class that will replace all direct uses of "clang::DeclContext" when used in compiler agnostic code, yet still allow for conversion to clang::DeclContext subclasses by clang specific code. This completes the abstraction of type parsing by removing all "clang::" references from the SymbolFileDWARF. The new "lldb_private::CompilerDeclContext" class abstracts decl contexts found in compiler type systems so they can be used in internal API calls. The TypeSystem is required to support CompilerDeclContexts with new pure virtual functions that start with "DeclContext" in the member function names. Converted all code that used lldb_private::ClangNamespaceDecl over to use the new CompilerDeclContext class and removed the ClangNamespaceDecl.cpp and ClangNamespaceDecl.h files. Removed direct use of clang APIs from SBType and now use the abstract type systems to correctly explore types. Bulk renames for things that used to return a ClangASTType which is now CompilerType: "Type::GetClangFullType()" to "Type::GetFullCompilerType()" "Type::GetClangLayoutType()" to "Type::GetLayoutCompilerType()" "Type::GetClangForwardType()" to "Type::GetForwardCompilerType()" "Value::GetClangType()" to "Value::GetCompilerType()" "Value::SetClangType (const CompilerType &)" to "Value::SetCompilerType (const CompilerType &)" "ValueObject::GetClangType ()" to "ValueObject::GetCompilerType()" many more renames that are similar. llvm-svn: 245905
2015-08-25 07:46:31 +08:00
CompilerType ValueObjectCast::GetCompilerTypeImpl() { return m_cast_type; }
size_t ValueObjectCast::CalculateNumChildren(uint32_t max) {
ExecutionContext exe_ctx(GetExecutionContextRef());
auto children_count = GetCompilerType().GetNumChildren(
true, &exe_ctx);
return children_count <= max ? children_count : max;
}
llvm::Optional<uint64_t> ValueObjectCast::GetByteSize() {
ExecutionContext exe_ctx(GetExecutionContextRef());
return m_value.GetValueByteSize(nullptr, &exe_ctx);
}
lldb::ValueType ValueObjectCast::GetValueType() const {
// Let our parent answer global, local, argument, etc...
return m_parent->GetValueType();
}
bool ValueObjectCast::UpdateValue() {
SetValueIsValid(false);
m_error.Clear();
if (m_parent->UpdateValueIfNeeded(false)) {
Value old_value(m_value);
m_update_point.SetUpdated();
m_value = m_parent->GetValue();
CompilerType compiler_type(GetCompilerType());
m_value.SetCompilerType(compiler_type);
SetAddressTypeOfChildren(m_parent->GetAddressTypeOfChildren());
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(m_value.GetValueType() != old_value.GetValueType() ||
m_value.GetScalar() != old_value.GetScalar());
}
ExecutionContext exe_ctx(GetExecutionContextRef());
m_error = m_value.GetValueAsData(&exe_ctx, m_data, GetModule().get());
SetValueDidChange(m_parent->GetValueDidChange());
return true;
}
// The dynamic value failed to get an error, pass the error along
if (m_error.Success() && m_parent->GetError().Fail())
m_error = m_parent->GetError();
SetValueIsValid(false);
return false;
}
bool ValueObjectCast::IsInScope() { return m_parent->IsInScope(); }