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Diffstat (limited to 'tools/lldb-mi/MICmnLLDBUtilSBValue.cpp')
-rw-r--r-- | tools/lldb-mi/MICmnLLDBUtilSBValue.cpp | 324 |
1 files changed, 324 insertions, 0 deletions
diff --git a/tools/lldb-mi/MICmnLLDBUtilSBValue.cpp b/tools/lldb-mi/MICmnLLDBUtilSBValue.cpp new file mode 100644 index 000000000000..004be071260a --- /dev/null +++ b/tools/lldb-mi/MICmnLLDBUtilSBValue.cpp @@ -0,0 +1,324 @@ +//===-- MICmnLLDBUtilSBValue.cpp --------------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +//++ +// File: MICmnLLDBUtilSBValue.cpp +// +// Overview: CMICmnLLDBUtilSBValue 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 "MICmnLLDBUtilSBValue.h" +#include "MIUtilString.h" +#include "MICmnLLDBDebugSessionInfo.h" + +//++ ------------------------------------------------------------------------------------ +// Details: CMICmnLLDBUtilSBValue constructor. +// Type: Method. +// Args: vrValue - (R) The LLDb value object. +// vbHandleCharType - (R) True = Yes return text molding to char type, +// False = just return data. +// Return: None. +// Throws: None. +//-- +CMICmnLLDBUtilSBValue::CMICmnLLDBUtilSBValue( const lldb::SBValue & vrValue, const bool vbHandleCharType /* = false */ ) +: m_rValue( const_cast< lldb::SBValue & >( vrValue ) ) +, m_pUnkwn( "??" ) +, m_bHandleCharType( vbHandleCharType ) +{ + m_bValidSBValue = m_rValue.IsValid(); +} + +//++ ------------------------------------------------------------------------------------ +// Details: CMICmnLLDBUtilSBValue destructor. +// Type: Method. +// Args: None. +// Return: None. +// Throws: None. +//-- +CMICmnLLDBUtilSBValue::~CMICmnLLDBUtilSBValue( void ) +{ +} + +//++ ------------------------------------------------------------------------------------ +// Details: Retrieve from the LLDB SB Value object the name of the variable. If the name +// is invalid (or the SBValue object invalid) then "??" is returned. +// Type: Method. +// Args: None. +// Return: CMIUtilString - Name of the variable or "??" for unknown. +// Throws: None. +//-- +CMIUtilString CMICmnLLDBUtilSBValue::GetName( void ) const +{ + const MIchar * pName = m_bValidSBValue ? m_rValue.GetName() : nullptr; + const CMIUtilString text( (pName != nullptr) ? pName : m_pUnkwn ); + + return text; +} + +//++ ------------------------------------------------------------------------------------ +// Details: Retrieve from the LLDB SB Value object the value of the variable described in +// text. If the value is invalid (or the SBValue object invalid) then "??" is +// returned. +// Type: Method. +// Args: None. +// Return: CMIUtilString - Text description of the variable's value or "??". +// Throws: None. +//-- +CMIUtilString CMICmnLLDBUtilSBValue::GetValue( void ) const +{ + CMIUtilString text; + + if( m_bHandleCharType && IsCharType() ) + { + const lldb::addr_t addr = m_rValue.GetLoadAddress(); + text = CMIUtilString::Format( "0x%08x", addr ); + const CMIUtilString cString( GetValueCString() ); + if( !cString.empty() ) + text += CMIUtilString::Format( " %s", cString.c_str() ); + } + else + { + const MIchar * pValue = m_bValidSBValue ? m_rValue.GetValue() : nullptr; + text = (pValue != nullptr) ? pValue : m_pUnkwn; + } + + return text; +} + +//++ ------------------------------------------------------------------------------------ +// Details: If the LLDB SB Value object is a char type then form the text data string +// otherwise return nothing. m_bHandleCharType must be true to return text data +// if any. +// Type: Method. +// Args: None. +// Return: CMIUtilString - Text description of the variable's value. +// Throws: None. +//-- +CMIUtilString CMICmnLLDBUtilSBValue::GetValueCString( void ) const +{ + CMIUtilString text; + + if( m_bHandleCharType && IsCharType() ) + { + text = ReadCStringFromHostMemory( m_rValue ); + } + + return text; +} + +//++ ------------------------------------------------------------------------------------ +// Details: Retrieve the flag stating whether this value object is a char type or some +// other type. Char type can be signed or unsigned. +// Type: Method. +// Args: None. +// Return: bool - True = Yes is a char type, false = some other type. +// Throws: None. +//-- +bool CMICmnLLDBUtilSBValue::IsCharType( void ) const +{ + const MIchar * pName = m_rValue.GetName(); MIunused( pName ); + const lldb::BasicType eType = m_rValue.GetType().GetBasicType(); + return ((eType == lldb::eBasicTypeChar) || + (eType == lldb::eBasicTypeSignedChar) || + (eType == lldb::eBasicTypeUnsignedChar) ); +} + +//++ ------------------------------------------------------------------------------------ +// Details: Retrieve the flag stating whether any child value object of *this object is a +// char type or some other type. Returns false if there are not children. Char +// type can be signed or unsigned. +// Type: Method. +// Args: None. +// Return: bool - True = Yes is a char type, false = some other type. +// Throws: None. +//-- +bool CMICmnLLDBUtilSBValue::IsChildCharType( void ) const +{ + const MIuint nChildren = m_rValue.GetNumChildren(); + + // Is it a basic type + if( nChildren == 0 ) + return false; + + // Is it a composite type + if( nChildren > 1 ) + return false; + + lldb::SBValue member = m_rValue.GetChildAtIndex( 0 ); + const CMICmnLLDBUtilSBValue utilValue( member ); + return utilValue.IsCharType(); +} + +//++ ------------------------------------------------------------------------------------ +// Details: Retrieve the C string data for a child of char type (one and only child) for +// the parent value object. If the child is not a char type or the parent has +// more than one child then an empty string is returned. Char type can be +// signed or unsigned. +// Type: Method. +// Args: None. +// Return: CMIUtilString - Text description of the variable's value. +// Throws: None. +//-- +CMIUtilString CMICmnLLDBUtilSBValue::GetChildValueCString( void ) const +{ + CMIUtilString text; + const MIuint nChildren = m_rValue.GetNumChildren(); + + // Is it a basic type + if( nChildren == 0 ) + return text; + + // Is it a composite type + if( nChildren > 1 ) + return text; + + lldb::SBValue member = m_rValue.GetChildAtIndex( 0 ); + const CMICmnLLDBUtilSBValue utilValue( member ); + if( m_bHandleCharType && utilValue.IsCharType() ) + { + text = ReadCStringFromHostMemory( member ); + } + + return text; +} + +//++ ------------------------------------------------------------------------------------ +// Details: Retrieve the C string data of value object by read the memory where the +// variable is held. +// Type: Method. +// Args: vrValueObj - (R) LLDB SBValue variable object. +// Return: CMIUtilString - Text description of the variable's value. +// Throws: None. +//-- +CMIUtilString CMICmnLLDBUtilSBValue::ReadCStringFromHostMemory( const lldb::SBValue & vrValueObj ) const +{ + CMIUtilString text; + + lldb::SBValue & rValue = const_cast< lldb::SBValue & >( vrValueObj ); + const lldb::addr_t addr = rValue.GetLoadAddress(); + CMICmnLLDBDebugSessionInfo & rSessionInfo( CMICmnLLDBDebugSessionInfo::Instance() ); + const MIuint nBytes( 128 ); + const MIchar * pBufferMemory = new MIchar[ nBytes ]; + lldb::SBError error; + const MIuint64 nReadBytes = rSessionInfo.m_lldbProcess.ReadMemory( addr, (void *) pBufferMemory, nBytes, error ); MIunused( nReadBytes ); + text = CMIUtilString::Format( "\\\"%s\\\"", pBufferMemory ); + delete [] pBufferMemory; + + return text; +} + +//++ ------------------------------------------------------------------------------------ +// Details: Retrieve the state of the value object's name. +// Type: Method. +// Args: None. +// Return: bool - True = yes name is indeterminate, false = name is valid. +// Throws: None. +//-- +bool CMICmnLLDBUtilSBValue::IsNameUnknown( void ) const +{ + const CMIUtilString name( GetName() ); + return (name == m_pUnkwn); +} + +//++ ------------------------------------------------------------------------------------ +// Details: Retrieve the state of the value object's value data. +// Type: Method. +// Args: None. +// Return: bool - True = yes value is indeterminate, false = value valid. +// Throws: None. +//-- +bool CMICmnLLDBUtilSBValue::IsValueUnknown( void ) const +{ + const CMIUtilString value( GetValue() ); + return (value == m_pUnkwn); +} + +//++ ------------------------------------------------------------------------------------ +// Details: Retrieve the value object's type name if valid. +// Type: Method. +// Args: None. +// Return: CMIUtilString - The type name or "??". +// Throws: None. +//-- +CMIUtilString CMICmnLLDBUtilSBValue::GetTypeName( void ) const +{ + const MIchar * pName = m_bValidSBValue ? m_rValue.GetTypeName() : nullptr; + const CMIUtilString text( (pName != nullptr) ? pName : m_pUnkwn ); + + return text; +} + +//++ ------------------------------------------------------------------------------------ +// Details: Retrieve the value object's display type name if valid. +// Type: Method. +// Args: None. +// Return: CMIUtilString - The type name or "??". +// Throws: None. +//-- +CMIUtilString CMICmnLLDBUtilSBValue::GetTypeNameDisplay( void ) const +{ + const MIchar * pName = m_bValidSBValue ? m_rValue.GetDisplayTypeName() : nullptr; + const CMIUtilString text( (pName != nullptr) ? pName : m_pUnkwn ); + + return text; +} + +//++ ------------------------------------------------------------------------------------ +// Details: Retrieve whether the value object's is valid or not. +// Type: Method. +// Args: None. +// Return: bool - True = valid, false = not valid. +// Throws: None. +//-- +bool CMICmnLLDBUtilSBValue::IsValid( void ) const +{ + return m_bValidSBValue; +} + +//++ ------------------------------------------------------------------------------------ +// Details: Retrieve the value object' has a name. A value object can be valid but still +// have no name which suggest it is not a variable. +// Type: Method. +// Args: None. +// Return: bool - True = valid, false = not valid. +// Throws: None. +//-- +bool CMICmnLLDBUtilSBValue::HasName( void ) const +{ + bool bHasAName = false; + + const MIchar * pName = m_bValidSBValue ? m_rValue.GetDisplayTypeName() : nullptr; + if( pName != nullptr ) + { + bHasAName = (CMIUtilString( pName ).length() > 0); + } + + return bHasAName; +} + +//++ ------------------------------------------------------------------------------------ +// Details: Determine if the value object' respresents a LLDB variable i.e. "$0". +// Type: Method. +// Args: None. +// Return: bool - True = Yes LLDB variable, false = no. +// Throws: None. +//-- +bool CMICmnLLDBUtilSBValue::IsLLDBVariable( void ) const +{ + return (GetName().at( 0 ) == '$' ); +} + + |