llvm-capstone/lldb/source/Interpreter/OptionValueRegex.cpp
Tatyana Krasnukha f0f183ee4a [lldb/Interpreter] Fix deep copying for OptionValue classes
Some implementations of the DeepCopy function called the copy constructor that copied m_parent member instead of setting a new parent. Others just leaved the base class's members (m_parent, m_callback, m_was_set) empty.
One more problem is that not all classes override this function, e.g. OptionValueArgs::DeepCopy produces OptionValueArray instance, and Target[Process/Thread]ValueProperty::DeepCopy produces OptionValueProperty. This makes downcasting via static_cast invalid.

The patch implements idiom "virtual constructor" to fix these issues.
Add a test that checks DeepCopy for correct copying/setting all data members of the base class.

Differential Revision: https://reviews.llvm.org/D96952
2021-02-28 19:23:25 +03:00

62 lines
1.8 KiB
C++

//===-- OptionValueRegex.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/Interpreter/OptionValueRegex.h"
#include "lldb/Utility/Stream.h"
using namespace lldb;
using namespace lldb_private;
void OptionValueRegex::DumpValue(const ExecutionContext *exe_ctx, Stream &strm,
uint32_t dump_mask) {
if (dump_mask & eDumpOptionType)
strm.Printf("(%s)", GetTypeAsCString());
if (dump_mask & eDumpOptionValue) {
if (dump_mask & eDumpOptionType)
strm.PutCString(" = ");
if (m_regex.IsValid()) {
llvm::StringRef regex_text = m_regex.GetText();
strm.Printf("%s", regex_text.str().c_str());
}
}
}
Status OptionValueRegex::SetValueFromString(llvm::StringRef value,
VarSetOperationType op) {
Status error;
switch (op) {
case eVarSetOperationInvalid:
case eVarSetOperationInsertBefore:
case eVarSetOperationInsertAfter:
case eVarSetOperationRemove:
case eVarSetOperationAppend:
error = OptionValue::SetValueFromString(value, op);
break;
case eVarSetOperationClear:
Clear();
NotifyValueChanged();
break;
case eVarSetOperationReplace:
case eVarSetOperationAssign:
m_regex = RegularExpression(value);
if (m_regex.IsValid()) {
m_value_was_set = true;
NotifyValueChanged();
} else if (llvm::Error err = m_regex.GetError()) {
error.SetErrorString(llvm::toString(std::move(err)));
} else {
error.SetErrorString("regex error");
}
break;
}
return error;
}