llvm-project/lldb/tools/lldb-mi/MICmnLLDBDebugSessionInfoVarObj.cpp

//===-- MICmnLLDBDebugSessionInfoVarObj.cpp ---------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

//++
// File:        MICmnLLDBDebugSessionInfoVarObj.cpp
//
// Overview:    CMICmnLLDBDebugSessionInfoVarObj implementation.
//
// Environment: Compilers:  Visual C++ 12.
//                          gcc (Ubuntu/Linaro 4.8.1-10ubuntu9) 4.8.1
//              Libraries:  See MIReadmetxt.
//
// Copyright:   None.
//--

// In-house headers:
#include "MICmnLLDBDebugSessionInfoVarObj.h"
#include "MICmnLLDBProxySBValue.h"
#include "MICmnLLDBUtilSBValue.h"

// Instantiations:
const MIchar *CMICmnLLDBDebugSessionInfoVarObj::ms_aVarFormatStrings[] = {
    // CODETAG_SESSIONINFO_VARFORMAT_ENUM
    // *** Order is import here.
    "<Invalid var format>", "binary", "octal", "decimal", "hexadecimal", "natural"};
const MIchar *CMICmnLLDBDebugSessionInfoVarObj::ms_aVarFormatChars[] = {
    // CODETAG_SESSIONINFO_VARFORMAT_ENUM
    // *** Order is import here.
    "<Invalid var format>", "t", "o", "d", "x", "N"};
CMICmnLLDBDebugSessionInfoVarObj::MapKeyToVarObj_t CMICmnLLDBDebugSessionInfoVarObj::ms_mapVarIdToVarObj;
MIuint CMICmnLLDBDebugSessionInfoVarObj::ms_nVarUniqueId = 0; // Index from 0

//++ ------------------------------------------------------------------------------------
// Details: CMICmnLLDBDebugSessionInfoVarObj constructor.
// Type:    Method.
// Args:    None.
// Return:  None.
// Throws:  None.
//--
CMICmnLLDBDebugSessionInfoVarObj::CMICmnLLDBDebugSessionInfoVarObj(void)
    : m_eVarFormat(eVarFormat_Natural)
    , m_eVarType(eVarType_Internal)
{
    // Do not call UpdateValue() in here as not necessary
}

//++ ------------------------------------------------------------------------------------
// Details: CMICmnLLDBDebugSessionInfoVarObj constructor.
// Type:    Method.
// Args:    vrStrNameReal   - (R) The actual name of the variable, the expression.
//          vrStrName       - (R) The name given for *this var object.
//          vrValue         - (R) The LLDB SBValue object represented by *this object.
// Return:  None.
// Throws:  None.
//--
CMICmnLLDBDebugSessionInfoVarObj::CMICmnLLDBDebugSessionInfoVarObj(const CMIUtilString &vrStrNameReal, const CMIUtilString &vrStrName,
                                                                   const lldb::SBValue &vrValue)
    : m_eVarFormat(eVarFormat_Natural)
    , m_eVarType(eVarType_Internal)
    , m_strName(vrStrName)
    , m_SBValue(vrValue)
    , m_strNameReal(vrStrNameReal)
{
    UpdateValue();
}

//++ ------------------------------------------------------------------------------------
// Details: CMICmnLLDBDebugSessionInfoVarObj constructor.
// Type:    Method.
// Args:    vrStrNameReal           - (R) The actual name of the variable, the expression.
//          vrStrName               - (R) The name given for *this var object.
//          vrValue                 - (R) The LLDB SBValue object represented by *this object.
//          vrStrVarObjParentName   - (R) The var object parent to *this var object (LLDB SBValue equivalent).
// Return:  None.
// Throws:  None.
//--
CMICmnLLDBDebugSessionInfoVarObj::CMICmnLLDBDebugSessionInfoVarObj(const CMIUtilString &vrStrNameReal, const CMIUtilString &vrStrName,
                                                                   const lldb::SBValue &vrValue, const CMIUtilString &vrStrVarObjParentName)
    : m_eVarFormat(eVarFormat_Natural)
    , m_eVarType(eVarType_Internal)
    , m_strName(vrStrName)
    , m_SBValue(vrValue)
    , m_strNameReal(vrStrNameReal)
    , m_strVarObjParentName(vrStrVarObjParentName)
{
    UpdateValue();
}

//++ ------------------------------------------------------------------------------------
// Details: CMICmnLLDBDebugSessionInfoVarObj copy constructor.
// Type:    Method.
// Args:    vrOther - (R) The object to copy from.
// Return:  None.
// Throws:  None.
//--
CMICmnLLDBDebugSessionInfoVarObj::CMICmnLLDBDebugSessionInfoVarObj(const CMICmnLLDBDebugSessionInfoVarObj &vrOther)
{
    CopyOther(vrOther);
}

//++ ------------------------------------------------------------------------------------
// Details: CMICmnLLDBDebugSessionInfoVarObj copy constructor.
// Type:    Method.
// Args:    vrOther - (R) The object to copy from.
// Return:  None.
// Throws:  None.
//--
CMICmnLLDBDebugSessionInfoVarObj::CMICmnLLDBDebugSessionInfoVarObj(CMICmnLLDBDebugSessionInfoVarObj &vrOther)
{
    CopyOther(vrOther);
}

//++ ------------------------------------------------------------------------------------
// Details: CMICmnLLDBDebugSessionInfoVarObj move constructor.
// Type:    Method.
// Args:    vrwOther    - (R) The object to copy from.
// Return:  None.
// Throws:  None.
//--
CMICmnLLDBDebugSessionInfoVarObj::CMICmnLLDBDebugSessionInfoVarObj(CMICmnLLDBDebugSessionInfoVarObj &&vrwOther)
{
    MoveOther(vrwOther);
}

//++ ------------------------------------------------------------------------------------
// Details: CMICmnLLDBDebugSessionInfoVarObj assignment operator.
// Type:    Method.
// Args:    vrOther - (R) The object to copy from.
// Return:  CMICmnLLDBDebugSessionInfoVarObj & - Updated *this object.
// Throws:  None.
//--
CMICmnLLDBDebugSessionInfoVarObj &CMICmnLLDBDebugSessionInfoVarObj::operator=(const CMICmnLLDBDebugSessionInfoVarObj &vrOther)
{
    CopyOther(vrOther);

    return *this;
}

//++ ------------------------------------------------------------------------------------
// Details: CMICmnLLDBDebugSessionInfoVarObj assignment operator.
// Type:    Method.
// Args:    vrwOther    - (R) The object to copy from.
// Return:  CMICmnLLDBDebugSessionInfoVarObj & - Updated *this object.
// Throws:  None.
//--
CMICmnLLDBDebugSessionInfoVarObj &CMICmnLLDBDebugSessionInfoVarObj::operator=(CMICmnLLDBDebugSessionInfoVarObj &&vrwOther)
{
    MoveOther(vrwOther);

    return *this;
}

//++ ------------------------------------------------------------------------------------
// Details: Copy the other instance of that object to *this object.
// Type:    Method.
// Args:    vrOther - (R) The object to copy from.
// Return:  MIstatus::success - Functional succeeded.
//          MIstatus::failure - Functional failed.
// Throws:  None.
//--
bool
CMICmnLLDBDebugSessionInfoVarObj::CopyOther(const CMICmnLLDBDebugSessionInfoVarObj &vrOther)
{
    // Check for self-assignment
    if (this == &vrOther)
        return MIstatus::success;

    m_eVarFormat = vrOther.m_eVarFormat;
    m_eVarType = vrOther.m_eVarType;
    m_strName = vrOther.m_strName;
    m_SBValue = vrOther.m_SBValue;
    m_strNameReal = vrOther.m_strNameReal;
    m_strFormattedValue = vrOther.m_strFormattedValue;
    m_strVarObjParentName = vrOther.m_strVarObjParentName;

    return MIstatus::success;
}

//++ ------------------------------------------------------------------------------------
// Details: Move that object to *this object.
// Type:    Method.
// Args:    vrwOther    - (RW) The object to copy from.
// Return:  MIstatus::success - Functional succeeded.
//          MIstatus::failure - Functional failed.
// Throws:  None.
//--
bool
CMICmnLLDBDebugSessionInfoVarObj::MoveOther(CMICmnLLDBDebugSessionInfoVarObj &vrwOther)
{
    // Check for self-assignment
    if (this == &vrwOther)
        return MIstatus::success;

    CopyOther(vrwOther);
    vrwOther.m_eVarFormat = eVarFormat_Natural;
    vrwOther.m_eVarType = eVarType_Internal;
    vrwOther.m_strName.clear();
    vrwOther.m_SBValue.Clear();
    vrwOther.m_strNameReal.clear();
    vrwOther.m_strFormattedValue.clear();
    vrwOther.m_strVarObjParentName.clear();

    return MIstatus::success;
}

//++ ------------------------------------------------------------------------------------
// Details: CMICmnLLDBDebugSessionInfoVarObj destructor.
// Type:    Overridden.
// Args:    None.
// Return:  None.
// Throws:  None.
//--
CMICmnLLDBDebugSessionInfoVarObj::~CMICmnLLDBDebugSessionInfoVarObj(void)
{
}

//++ ------------------------------------------------------------------------------------
// Details: Retrieve the var format enumeration for the specified string.
// Type:    Static method.
// Args:    vrStrFormat - (R) Text description of the var format.
// Return:  varFormat_e - Var format enumeration.
//                      - No match found return eVarFormat_Invalid.
// Throws:  None.
//--
CMICmnLLDBDebugSessionInfoVarObj::varFormat_e
CMICmnLLDBDebugSessionInfoVarObj::GetVarFormatForString(const CMIUtilString &vrStrFormat)
{
    // CODETAG_SESSIONINFO_VARFORMAT_ENUM
    for (MIuint i = 0; i < eVarFormat_count; i++)
    {
        const MIchar *pVarFormatString = ms_aVarFormatStrings[i];
        if (vrStrFormat == pVarFormatString)
            return static_cast<varFormat_e>(i);
    }

    return eVarFormat_Invalid;
}

//++ ------------------------------------------------------------------------------------
// Details: Retrieve the var format enumeration for the specified character.
// Type:    Static method.
// Args:    vrcFormat   - (R) Character representing the var format.
// Return:  varFormat_e - Var format enumeration.
//                      - No match found return eVarFormat_Invalid.
// Throws:  None.
//--
CMICmnLLDBDebugSessionInfoVarObj::varFormat_e
CMICmnLLDBDebugSessionInfoVarObj::GetVarFormatForChar(const MIchar &vrcFormat)
{
    if ('r' == vrcFormat)
        return eVarFormat_Hex;

    // CODETAG_SESSIONINFO_VARFORMAT_ENUM
    for (MIuint i = 0; i < eVarFormat_count; i++)
    {
        const MIchar *pVarFormatChar = ms_aVarFormatChars[i];
        if (*pVarFormatChar == vrcFormat)
            return static_cast<varFormat_e>(i);
    }

    return eVarFormat_Invalid;
}

//++ ------------------------------------------------------------------------------------
// Details: Return the equivalent var value formatted string for the given value type.
//          The SBValue vrValue parameter is checked by LLDB private code for valid
//          scalar type via MI Driver proxy function as the valued returned can also be
//          an error condition. The proxy function determines if the check was valid
//          otherwise return an error condition state by other means saying so.
// Type:    Static method.
// Args:    vrValue     - (R) The var value object.
//          veVarFormat - (R) Var format enumeration.
// Returns: CMIUtilString   - Value formatted string.
// Throws:  None.
//--
CMIUtilString
CMICmnLLDBDebugSessionInfoVarObj::GetValueStringFormatted(const lldb::SBValue &vrValue,
                                                          const CMICmnLLDBDebugSessionInfoVarObj::varFormat_e veVarFormat)
{
    CMIUtilString strFormattedValue;

    MIuint64 nValue = 0;
    if (CMICmnLLDBProxySBValue::GetValueAsUnsigned(vrValue, nValue) == MIstatus::success)
    {
        lldb::SBValue &rValue = const_cast<lldb::SBValue &>(vrValue);
        strFormattedValue = GetStringFormatted(nValue, rValue.GetValue(), veVarFormat);
    }
    else
    {
        // Composite variable type i.e. struct
        strFormattedValue = "{...}";
    }

    return strFormattedValue;
}

//++ ------------------------------------------------------------------------------------
// Details: Return nuber formatted string according to the given value type.
// Type:    Static method.
// Args:    vnValue             - (R) The number value to get formatted.
//          vpStrValueNatural   - (R) The natural representation of the number value.
//          veVarFormat         - (R) Var format enumeration.
// Returns: CMIUtilString       - Numerical formatted string.
// Throws:  None.
//--
CMIUtilString
CMICmnLLDBDebugSessionInfoVarObj::GetStringFormatted(const MIuint64 vnValue, const MIchar *vpStrValueNatural,
                                                     const CMICmnLLDBDebugSessionInfoVarObj::varFormat_e veVarFormat)
{
    CMIUtilString strFormattedValue;

    switch (veVarFormat)
    {
        case eVarFormat_Binary:
            strFormattedValue = CMIUtilString::FormatBinary(vnValue);
            break;
        case eVarFormat_Octal:
            strFormattedValue = CMIUtilString::Format("0%llo", vnValue);
            break;
        case eVarFormat_Decimal:
            strFormattedValue = CMIUtilString::Format("%lld", vnValue);
            break;
        case eVarFormat_Hex:
            strFormattedValue = CMIUtilString::Format("0x%llx", vnValue);
            break;
        case eVarFormat_Natural:
        default:
        {
            strFormattedValue = (vpStrValueNatural != nullptr) ? vpStrValueNatural : "";
        }
    }

    return strFormattedValue;
}

//++ ------------------------------------------------------------------------------------
// Details: Delete internal container contents.
// Type:    Static method.
// Args:    None.
// Returns: None.
// Throws:  None.
//--
void
CMICmnLLDBDebugSessionInfoVarObj::VarObjClear(void)
{
    ms_mapVarIdToVarObj.clear();
}

//++ ------------------------------------------------------------------------------------
// Details: Add a var object to the internal container.
// Type:    Static method.
// Args:    vrVarObj    - (R) The var value object.
// Returns: None.
// Throws:  None.
//--
void
CMICmnLLDBDebugSessionInfoVarObj::VarObjAdd(const CMICmnLLDBDebugSessionInfoVarObj &vrVarObj)
{
    VarObjDelete(vrVarObj.GetName());
    MapPairKeyToVarObj_t pr(vrVarObj.GetName(), vrVarObj);
    ms_mapVarIdToVarObj.insert(pr);
}

//++ ------------------------------------------------------------------------------------
// Details: Delete the var object from the internal container matching the specified name.
// Type:    Static method.
// Args:    vrVarName   - (R) The var value name.
// Returns: None.
// Throws:  None.
//--
void
CMICmnLLDBDebugSessionInfoVarObj::VarObjDelete(const CMIUtilString &vrVarName)
{
    const MapKeyToVarObj_t::const_iterator it = ms_mapVarIdToVarObj.find(vrVarName);
    if (it != ms_mapVarIdToVarObj.end())
    {
        ms_mapVarIdToVarObj.erase(it);
    }
}

//++ ------------------------------------------------------------------------------------
// Details: Update an existing var object in the internal container.
// Type:    Static method.
// Args:    vrVarObj    - (R) The var value object.
// Returns: None.
// Throws:  None.
//--
void
CMICmnLLDBDebugSessionInfoVarObj::VarObjUpdate(const CMICmnLLDBDebugSessionInfoVarObj &vrVarObj)
{
    VarObjAdd(vrVarObj);
}

//++ ------------------------------------------------------------------------------------
// Details: Retrieve the var object matching the specified name.
// Type:    Static method.
// Args:    vrVarName   - (R) The var value name.
//          vrwVarObj   - (W) A var object.
// Returns: bool    - True = object found, false = object not found.
// Throws:  None.
//--
bool
CMICmnLLDBDebugSessionInfoVarObj::VarObjGet(const CMIUtilString &vrVarName, CMICmnLLDBDebugSessionInfoVarObj &vrwVarObj)
{
    const MapKeyToVarObj_t::const_iterator it = ms_mapVarIdToVarObj.find(vrVarName);
    if (it != ms_mapVarIdToVarObj.end())
    {
        const CMICmnLLDBDebugSessionInfoVarObj &rVarObj = (*it).second;
        vrwVarObj = rVarObj;
        return true;
    }

    return false;
}

//++ ------------------------------------------------------------------------------------
// Details: A count is kept of the number of var value objects created. This is count is
//          used to ID the var value object. Reset the count to 0.
// Type:    Static method.
// Args:    None.
// Returns: None.
// Throws:  None.
//--
void
CMICmnLLDBDebugSessionInfoVarObj::VarObjIdResetToZero(void)
{
    ms_nVarUniqueId = 0;
}

//++ ------------------------------------------------------------------------------------
// Details: A count is kept of the number of var value objects created. This is count is
//          used to ID the var value object. Increment the count by 1.
// Type:    Static method.
// Args:    None.
// Returns: None.
// Throws:  None.
//--
void
CMICmnLLDBDebugSessionInfoVarObj::VarObjIdInc(void)
{
    ms_nVarUniqueId++;
}

//++ ------------------------------------------------------------------------------------
// Details: A count is kept of the number of var value objects created. This is count is
//          used to ID the var value object. Retrieve ID.
// Type:    Static method.
// Args:    None.
// Returns: None.
// Throws:  None.
//--
MIuint
CMICmnLLDBDebugSessionInfoVarObj::VarObjIdGet(void)
{
    return ms_nVarUniqueId;
}

//++ ------------------------------------------------------------------------------------
// Details: Retrieve the value formatted object's name.
// Type:    Method.
// Args:    None.
// Returns: CMIUtilString & - Value's var%u name text.
// Throws:  None.
//--
const CMIUtilString &
CMICmnLLDBDebugSessionInfoVarObj::GetName(void) const
{
    return m_strName;
}

//++ ------------------------------------------------------------------------------------
// Details: Retrieve the value formatted object's variable name as given in the MI command
//          to create the var object.
// Type:    Method.
// Args:    None.
// Returns: CMIUtilString & - Value's real name text.
// Throws:  None.
//--
const CMIUtilString &
CMICmnLLDBDebugSessionInfoVarObj::GetNameReal(void) const
{
    return m_strNameReal;
}

//++ ------------------------------------------------------------------------------------
// Details: Retrieve the value formatted string.
// Type:    Method.
// Args:    None.
// Returns: CMIUtilString & - Value formatted string.
// Throws:  None.
//--
const CMIUtilString &
CMICmnLLDBDebugSessionInfoVarObj::GetValueFormatted(void) const
{
    return m_strFormattedValue;
}

//++ ------------------------------------------------------------------------------------
// Details: Retrieve the LLDB Value object.
// Type:    Method.
// Args:    None.
// Returns: lldb::SBValue & - LLDB Value object.
// Throws:  None.
//--
const lldb::SBValue &
CMICmnLLDBDebugSessionInfoVarObj::GetValue(void) const
{
    return m_SBValue;
}

//++ ------------------------------------------------------------------------------------
// Details: Set the var format type for *this object and upate the formatting.
// Type:    Method.
// Args:    None.
// Return:  MIstatus::success - Functional succeeded.
//          MIstatus::failure - Functional failed.
// Throws:  None.
//--
bool
CMICmnLLDBDebugSessionInfoVarObj::SetVarFormat(const varFormat_e veVarFormat)
{
    if (veVarFormat >= eVarFormat_count)
        return MIstatus::failure;

    m_eVarFormat = veVarFormat;
    UpdateValue();
    return MIstatus::success;
}

//++ ------------------------------------------------------------------------------------
// Details: Update *this var obj. Update it's value and type.
// Type:    Method.
// Args:    None.
// Returns: None.
// Throws:  None.
//--
void
CMICmnLLDBDebugSessionInfoVarObj::UpdateValue(void)
{
    m_strFormattedValue = CMICmnLLDBDebugSessionInfoVarObj::GetValueStringFormatted(m_SBValue, m_eVarFormat);

    MIuint64 nValue = 0;
    if (CMICmnLLDBProxySBValue::GetValueAsUnsigned(m_SBValue, nValue) == MIstatus::failure)
        m_eVarType = eVarType_Composite;

    CMICmnLLDBDebugSessionInfoVarObj::VarObjUpdate(*this);
}

//++ ------------------------------------------------------------------------------------
// Details: Retrieve the enumeration type of the var object.
// Type:    Method.
// Args:    None.
// Returns: varType_e   - Enumeration value.
// Throws:  None.
//--
CMICmnLLDBDebugSessionInfoVarObj::varType_e
CMICmnLLDBDebugSessionInfoVarObj::GetType(void) const
{
    return m_eVarType;
}

//++ ------------------------------------------------------------------------------------
// Details: Retrieve the parent var object's name, the parent var object  to *this var
//          object (if assigned). The parent is equivalent to LLDB SBValue variable's
//          parent.
// Type:    Method.
// Args:    None.
// Returns: CMIUtilString & - Pointer to var object, NULL = no parent.
// Throws:  None.
//--
const CMIUtilString &
CMICmnLLDBDebugSessionInfoVarObj::GetVarParentName(void) const
{
    return m_strVarObjParentName;
}