forked from OSchip/llvm-project
337 lines
11 KiB
C++
337 lines
11 KiB
C++
//===-- MICmnLLDBUtilSBValue.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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//++
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// File: MICmnLLDBUtilSBValue.cpp
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//
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// Overview: CMICmnLLDBUtilSBValue implementation.
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//
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// Environment: Compilers: Visual C++ 12.
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// gcc (Ubuntu/Linaro 4.8.1-10ubuntu9) 4.8.1
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// Libraries: See MIReadmetxt.
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//
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// Copyright: None.
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//--
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// In-house headers:
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#include "MICmnLLDBUtilSBValue.h"
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#include "MIUtilString.h"
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#include "MICmnLLDBDebugSessionInfo.h"
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//++ ------------------------------------------------------------------------------------
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// Details: CMICmnLLDBUtilSBValue constructor.
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// Type: Method.
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// Args: vrValue - (R) The LLDb value object.
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// vbHandleCharType - (R) True = Yes return text molding to char type,
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// False = just return data.
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// Return: None.
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// Throws: None.
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//--
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CMICmnLLDBUtilSBValue::CMICmnLLDBUtilSBValue(const lldb::SBValue &vrValue, const bool vbHandleCharType /* = false */)
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: m_rValue(const_cast<lldb::SBValue &>(vrValue))
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, m_pUnkwn("??")
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, m_bHandleCharType(vbHandleCharType)
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{
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m_bValidSBValue = m_rValue.IsValid();
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}
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//++ ------------------------------------------------------------------------------------
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// Details: CMICmnLLDBUtilSBValue destructor.
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// Type: Method.
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// Args: None.
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// Return: None.
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// Throws: None.
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//--
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CMICmnLLDBUtilSBValue::~CMICmnLLDBUtilSBValue(void)
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{
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}
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//++ ------------------------------------------------------------------------------------
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// Details: Retrieve from the LLDB SB Value object the name of the variable. If the name
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// is invalid (or the SBValue object invalid) then "??" is returned.
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// Type: Method.
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// Args: None.
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// Return: CMIUtilString - Name of the variable or "??" for unknown.
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// Throws: None.
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//--
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CMIUtilString
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CMICmnLLDBUtilSBValue::GetName(void) const
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{
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const MIchar *pName = m_bValidSBValue ? m_rValue.GetName() : nullptr;
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const CMIUtilString text((pName != nullptr) ? pName : m_pUnkwn);
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return text;
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}
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//++ ------------------------------------------------------------------------------------
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// Details: Retrieve from the LLDB SB Value object the value of the variable described in
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// text. If the value is invalid (or the SBValue object invalid) then "??" is
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// returned.
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// Type: Method.
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// Args: None.
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// Return: CMIUtilString - Text description of the variable's value or "??".
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// Throws: None.
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//--
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CMIUtilString
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CMICmnLLDBUtilSBValue::GetValue(void) const
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{
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CMIUtilString text;
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if (m_bHandleCharType && IsCharType())
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{
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const lldb::addr_t addr = m_rValue.GetLoadAddress();
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text = CMIUtilString::Format("0x%08x", addr);
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const CMIUtilString cString(GetValueCString());
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if (!cString.empty())
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text += CMIUtilString::Format(" %s", cString.c_str());
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}
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else
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{
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const MIchar *pValue = m_bValidSBValue ? m_rValue.GetValue() : nullptr;
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text = (pValue != nullptr) ? pValue : m_pUnkwn;
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}
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return text;
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}
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//++ ------------------------------------------------------------------------------------
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// Details: If the LLDB SB Value object is a char type then form the text data string
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// otherwise return nothing. m_bHandleCharType must be true to return text data
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// if any.
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// Type: Method.
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// Args: None.
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// Return: CMIUtilString - Text description of the variable's value.
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// Throws: None.
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//--
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CMIUtilString
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CMICmnLLDBUtilSBValue::GetValueCString(void) const
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{
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CMIUtilString text;
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if (m_bHandleCharType && IsCharType())
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{
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text = ReadCStringFromHostMemory(m_rValue);
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}
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return text;
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}
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//++ ------------------------------------------------------------------------------------
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// Details: Retrieve the flag stating whether this value object is a char type or some
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// other type. Char type can be signed or unsigned.
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// Type: Method.
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// Args: None.
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// Return: bool - True = Yes is a char type, false = some other type.
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// Throws: None.
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//--
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bool
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CMICmnLLDBUtilSBValue::IsCharType(void) const
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{
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const MIchar *pName = m_rValue.GetName();
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MIunused(pName);
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const lldb::BasicType eType = m_rValue.GetType().GetBasicType();
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return ((eType == lldb::eBasicTypeChar) || (eType == lldb::eBasicTypeSignedChar) || (eType == lldb::eBasicTypeUnsignedChar));
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}
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//++ ------------------------------------------------------------------------------------
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// Details: Retrieve the flag stating whether any child value object of *this object is a
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// char type or some other type. Returns false if there are not children. Char
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// type can be signed or unsigned.
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// Type: Method.
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// Args: None.
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// Return: bool - True = Yes is a char type, false = some other type.
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// Throws: None.
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//--
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bool
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CMICmnLLDBUtilSBValue::IsChildCharType(void) const
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{
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const MIuint nChildren = m_rValue.GetNumChildren();
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// Is it a basic type
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if (nChildren == 0)
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return false;
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// Is it a composite type
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if (nChildren > 1)
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return false;
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lldb::SBValue member = m_rValue.GetChildAtIndex(0);
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const CMICmnLLDBUtilSBValue utilValue(member);
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return utilValue.IsCharType();
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}
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//++ ------------------------------------------------------------------------------------
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// Details: Retrieve the C string data for a child of char type (one and only child) for
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// the parent value object. If the child is not a char type or the parent has
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// more than one child then an empty string is returned. Char type can be
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// signed or unsigned.
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// Type: Method.
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// Args: None.
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// Return: CMIUtilString - Text description of the variable's value.
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// Throws: None.
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//--
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CMIUtilString
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CMICmnLLDBUtilSBValue::GetChildValueCString(void) const
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{
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CMIUtilString text;
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const MIuint nChildren = m_rValue.GetNumChildren();
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// Is it a basic type
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if (nChildren == 0)
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return text;
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// Is it a composite type
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if (nChildren > 1)
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return text;
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lldb::SBValue member = m_rValue.GetChildAtIndex(0);
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const CMICmnLLDBUtilSBValue utilValue(member);
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if (m_bHandleCharType && utilValue.IsCharType())
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{
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text = ReadCStringFromHostMemory(member);
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}
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return text;
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}
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//++ ------------------------------------------------------------------------------------
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// Details: Retrieve the C string data of value object by read the memory where the
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// variable is held.
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// Type: Method.
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// Args: vrValueObj - (R) LLDB SBValue variable object.
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// Return: CMIUtilString - Text description of the variable's value.
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// Throws: None.
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//--
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CMIUtilString
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CMICmnLLDBUtilSBValue::ReadCStringFromHostMemory(const lldb::SBValue &vrValueObj) const
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{
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CMIUtilString text;
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lldb::SBValue &rValue = const_cast<lldb::SBValue &>(vrValueObj);
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const lldb::addr_t addr = rValue.GetLoadAddress();
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CMICmnLLDBDebugSessionInfo &rSessionInfo(CMICmnLLDBDebugSessionInfo::Instance());
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const MIuint nBytes(128);
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const MIchar *pBufferMemory = new MIchar[nBytes];
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lldb::SBError error;
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const MIuint64 nReadBytes = rSessionInfo.m_lldbProcess.ReadMemory(addr, (void *)pBufferMemory, nBytes, error);
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MIunused(nReadBytes);
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text = CMIUtilString::Format("\\\"%s\\\"", pBufferMemory);
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delete[] pBufferMemory;
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return text;
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}
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//++ ------------------------------------------------------------------------------------
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// Details: Retrieve the state of the value object's name.
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// Type: Method.
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// Args: None.
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// Return: bool - True = yes name is indeterminate, false = name is valid.
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// Throws: None.
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//--
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bool
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CMICmnLLDBUtilSBValue::IsNameUnknown(void) const
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{
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const CMIUtilString name(GetName());
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return (name == m_pUnkwn);
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}
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//++ ------------------------------------------------------------------------------------
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// Details: Retrieve the state of the value object's value data.
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// Type: Method.
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// Args: None.
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// Return: bool - True = yes value is indeterminate, false = value valid.
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// Throws: None.
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//--
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bool
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CMICmnLLDBUtilSBValue::IsValueUnknown(void) const
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{
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const CMIUtilString value(GetValue());
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return (value == m_pUnkwn);
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}
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//++ ------------------------------------------------------------------------------------
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// Details: Retrieve the value object's type name if valid.
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// Type: Method.
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// Args: None.
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// Return: CMIUtilString - The type name or "??".
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// Throws: None.
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//--
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CMIUtilString
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CMICmnLLDBUtilSBValue::GetTypeName(void) const
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{
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const MIchar *pName = m_bValidSBValue ? m_rValue.GetTypeName() : nullptr;
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const CMIUtilString text((pName != nullptr) ? pName : m_pUnkwn);
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return text;
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}
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//++ ------------------------------------------------------------------------------------
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// Details: Retrieve the value object's display type name if valid.
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// Type: Method.
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// Args: None.
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// Return: CMIUtilString - The type name or "??".
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// Throws: None.
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//--
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CMIUtilString
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CMICmnLLDBUtilSBValue::GetTypeNameDisplay(void) const
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{
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const MIchar *pName = m_bValidSBValue ? m_rValue.GetDisplayTypeName() : nullptr;
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const CMIUtilString text((pName != nullptr) ? pName : m_pUnkwn);
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return text;
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}
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//++ ------------------------------------------------------------------------------------
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// Details: Retrieve whether the value object's is valid or not.
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// Type: Method.
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// Args: None.
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// Return: bool - True = valid, false = not valid.
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// Throws: None.
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//--
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bool
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CMICmnLLDBUtilSBValue::IsValid(void) const
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{
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return m_bValidSBValue;
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}
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//++ ------------------------------------------------------------------------------------
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// Details: Retrieve the value object' has a name. A value object can be valid but still
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// have no name which suggest it is not a variable.
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// Type: Method.
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// Args: None.
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// Return: bool - True = valid, false = not valid.
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// Throws: None.
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//--
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bool
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CMICmnLLDBUtilSBValue::HasName(void) const
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{
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bool bHasAName = false;
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const MIchar *pName = m_bValidSBValue ? m_rValue.GetDisplayTypeName() : nullptr;
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if (pName != nullptr)
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{
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bHasAName = (CMIUtilString(pName).length() > 0);
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}
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return bHasAName;
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}
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//++ ------------------------------------------------------------------------------------
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// Details: Determine if the value object' respresents a LLDB variable i.e. "$0".
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// Type: Method.
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// Args: None.
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// Return: bool - True = Yes LLDB variable, false = no.
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// Throws: None.
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//--
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bool
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CMICmnLLDBUtilSBValue::IsLLDBVariable(void) const
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{
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return (GetName().at(0) == '$');
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}
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