forked from OSchip/llvm-project
826 lines
29 KiB
C++
826 lines
29 KiB
C++
//===-- ValueObject.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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#include "lldb/Core/ValueObject.h"
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// C Includes
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#include <stdlib.h>
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// C++ Includes
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// Other libraries and framework includes
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#include "llvm/Support/raw_ostream.h"
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// Project includes
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#include "lldb/Core/DataBufferHeap.h"
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#include "lldb/Core/StreamString.h"
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#include "lldb/Core/ValueObjectChild.h"
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#include "lldb/Core/ValueObjectList.h"
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#include "lldb/Symbol/ClangASTType.h"
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#include "lldb/Symbol/ClangASTContext.h"
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#include "lldb/Symbol/Type.h"
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#include "lldb/Target/ExecutionContext.h"
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#include "lldb/Target/Process.h"
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#include "lldb/Target/RegisterContext.h"
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#include "lldb/Target/Target.h"
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#include "lldb/Target/Thread.h"
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using namespace lldb;
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using namespace lldb_private;
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static lldb::user_id_t g_value_obj_uid = 0;
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//----------------------------------------------------------------------
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// ValueObject constructor
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//----------------------------------------------------------------------
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ValueObject::ValueObject () :
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UserID (++g_value_obj_uid), // Unique identifier for every value object
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m_update_id (0), // Value object lists always start at 1, value objects start at zero
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m_name (),
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m_data (),
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m_value (),
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m_error (),
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m_value_str (),
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m_old_value_str (),
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m_location_str (),
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m_summary_str (),
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m_object_desc_str (),
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m_children (),
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m_synthetic_children (),
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m_value_is_valid (false),
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m_value_did_change (false),
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m_children_count_valid (false),
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m_old_value_valid (false)
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{
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}
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//----------------------------------------------------------------------
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// Destructor
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//----------------------------------------------------------------------
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ValueObject::~ValueObject ()
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{
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}
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user_id_t
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ValueObject::GetUpdateID() const
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{
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return m_update_id;
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}
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bool
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ValueObject::UpdateValueIfNeeded (ExecutionContextScope *exe_scope)
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{
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if (exe_scope)
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{
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Process *process = exe_scope->CalculateProcess();
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if (process)
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{
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const user_id_t stop_id = process->GetStopID();
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if (m_update_id != stop_id)
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{
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bool first_update = m_update_id == 0;
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// Save the old value using swap to avoid a string copy which
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// also will clear our m_value_str
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if (m_value_str.empty())
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{
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m_old_value_valid = false;
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}
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else
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{
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m_old_value_valid = true;
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m_old_value_str.swap (m_value_str);
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m_value_str.clear();
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}
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m_location_str.clear();
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m_summary_str.clear();
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m_object_desc_str.clear();
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const bool value_was_valid = GetValueIsValid();
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SetValueDidChange (false);
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m_error.Clear();
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// Call the pure virtual function to update the value
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UpdateValue (exe_scope);
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// Update the fact that we tried to update the value for this
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// value object wether or not we succeed
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m_update_id = stop_id;
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bool success = m_error.Success();
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SetValueIsValid (success);
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if (first_update)
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SetValueDidChange (false);
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else if (!m_value_did_change && success == false)
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{
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// The value wasn't gotten successfully, so we mark this
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// as changed if the value used to be valid and now isn't
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SetValueDidChange (value_was_valid);
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}
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}
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}
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}
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return m_error.Success();
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}
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const DataExtractor &
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ValueObject::GetDataExtractor () const
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{
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return m_data;
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}
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DataExtractor &
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ValueObject::GetDataExtractor ()
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{
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return m_data;
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}
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const Error &
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ValueObject::GetError() const
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{
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return m_error;
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}
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const ConstString &
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ValueObject::GetName() const
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{
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return m_name;
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}
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const char *
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ValueObject::GetLocationAsCString (ExecutionContextScope *exe_scope)
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{
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if (UpdateValueIfNeeded(exe_scope))
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{
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if (m_location_str.empty())
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{
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StreamString sstr;
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switch (m_value.GetValueType())
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{
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default:
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break;
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case Value::eValueTypeScalar:
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if (m_value.GetContextType() == Value::eContextTypeDCRegisterInfo)
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{
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RegisterInfo *reg_info = m_value.GetRegisterInfo();
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if (reg_info)
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{
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if (reg_info->name)
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m_location_str = reg_info->name;
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else if (reg_info->alt_name)
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m_location_str = reg_info->alt_name;
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break;
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}
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}
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m_location_str = "scalar";
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break;
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case Value::eValueTypeLoadAddress:
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case Value::eValueTypeFileAddress:
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case Value::eValueTypeHostAddress:
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{
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uint32_t addr_nibble_size = m_data.GetAddressByteSize() * 2;
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sstr.Printf("0x%*.*llx", addr_nibble_size, addr_nibble_size, m_value.GetScalar().ULongLong(LLDB_INVALID_ADDRESS));
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m_location_str.swap(sstr.GetString());
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}
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break;
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}
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}
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}
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return m_location_str.c_str();
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}
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Value &
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ValueObject::GetValue()
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{
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return m_value;
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}
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const Value &
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ValueObject::GetValue() const
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{
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return m_value;
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}
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bool
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ValueObject::GetValueIsValid () const
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{
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return m_value_is_valid;
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}
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void
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ValueObject::SetValueIsValid (bool b)
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{
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m_value_is_valid = b;
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}
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bool
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ValueObject::GetValueDidChange (ExecutionContextScope *exe_scope)
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{
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GetValueAsCString (exe_scope);
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return m_value_did_change;
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}
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void
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ValueObject::SetValueDidChange (bool value_changed)
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{
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m_value_did_change = value_changed;
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}
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ValueObjectSP
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ValueObject::GetChildAtIndex (uint32_t idx, bool can_create)
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{
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ValueObjectSP child_sp;
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if (idx < GetNumChildren())
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{
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// Check if we have already made the child value object?
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if (can_create && m_children[idx].get() == NULL)
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{
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// No we haven't created the child at this index, so lets have our
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// subclass do it and cache the result for quick future access.
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m_children[idx] = CreateChildAtIndex (idx, false, 0);
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}
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child_sp = m_children[idx];
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}
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return child_sp;
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}
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uint32_t
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ValueObject::GetIndexOfChildWithName (const ConstString &name)
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{
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bool omit_empty_base_classes = true;
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return ClangASTContext::GetIndexOfChildWithName (GetClangAST(),
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GetOpaqueClangQualType(),
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name.AsCString(),
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omit_empty_base_classes);
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}
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ValueObjectSP
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ValueObject::GetChildMemberWithName (const ConstString &name, bool can_create)
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{
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// when getting a child by name, it could be burried inside some base
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// classes (which really aren't part of the expression path), so we
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// need a vector of indexes that can get us down to the correct child
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std::vector<uint32_t> child_indexes;
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clang::ASTContext *clang_ast = GetClangAST();
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void *clang_type = GetOpaqueClangQualType();
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bool omit_empty_base_classes = true;
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const size_t num_child_indexes = ClangASTContext::GetIndexOfChildMemberWithName (clang_ast,
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clang_type,
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name.AsCString(),
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omit_empty_base_classes,
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child_indexes);
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ValueObjectSP child_sp;
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if (num_child_indexes > 0)
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{
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std::vector<uint32_t>::const_iterator pos = child_indexes.begin ();
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std::vector<uint32_t>::const_iterator end = child_indexes.end ();
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child_sp = GetChildAtIndex(*pos, can_create);
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for (++pos; pos != end; ++pos)
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{
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if (child_sp)
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{
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ValueObjectSP new_child_sp(child_sp->GetChildAtIndex (*pos, can_create));
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child_sp = new_child_sp;
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}
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else
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{
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child_sp.reset();
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}
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}
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}
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return child_sp;
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}
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uint32_t
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ValueObject::GetNumChildren ()
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{
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if (!m_children_count_valid)
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{
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SetNumChildren (CalculateNumChildren());
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}
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return m_children.size();
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}
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void
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ValueObject::SetNumChildren (uint32_t num_children)
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{
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m_children_count_valid = true;
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m_children.resize(num_children);
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}
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void
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ValueObject::SetName (const char *name)
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{
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m_name.SetCString(name);
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}
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void
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ValueObject::SetName (const ConstString &name)
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{
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m_name = name;
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}
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ValueObjectSP
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ValueObject::CreateChildAtIndex (uint32_t idx, bool synthetic_array_member, int32_t synthetic_index)
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{
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ValueObjectSP valobj_sp;
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bool omit_empty_base_classes = true;
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std::string child_name_str;
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uint32_t child_byte_size = 0;
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int32_t child_byte_offset = 0;
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uint32_t child_bitfield_bit_size = 0;
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uint32_t child_bitfield_bit_offset = 0;
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const bool transparent_pointers = synthetic_array_member == false;
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clang::ASTContext *clang_ast = GetClangAST();
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void *clang_type = GetOpaqueClangQualType();
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void *child_clang_type;
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child_clang_type = ClangASTContext::GetChildClangTypeAtIndex (clang_ast,
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GetName().AsCString(),
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clang_type,
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idx,
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transparent_pointers,
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omit_empty_base_classes,
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child_name_str,
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child_byte_size,
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child_byte_offset,
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child_bitfield_bit_size,
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child_bitfield_bit_offset);
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if (child_clang_type)
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{
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if (synthetic_index)
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child_byte_offset += child_byte_size * synthetic_index;
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ConstString child_name;
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if (!child_name_str.empty())
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child_name.SetCString (child_name_str.c_str());
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valobj_sp.reset (new ValueObjectChild (this,
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clang_ast,
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child_clang_type,
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child_name,
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child_byte_size,
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child_byte_offset,
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child_bitfield_bit_size,
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child_bitfield_bit_offset));
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}
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return valobj_sp;
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}
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const char *
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ValueObject::GetSummaryAsCString (ExecutionContextScope *exe_scope)
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{
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if (UpdateValueIfNeeded (exe_scope))
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{
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if (m_summary_str.empty())
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{
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void *clang_type = GetOpaqueClangQualType();
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// See if this is a pointer to a C string?
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uint32_t fixed_length = 0;
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if (clang_type)
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{
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StreamString sstr;
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if (ClangASTContext::IsCStringType (clang_type, fixed_length))
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{
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Process *process = exe_scope->CalculateProcess();
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if (process != NULL)
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{
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lldb::AddressType cstr_address_type = eAddressTypeInvalid;
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lldb::addr_t cstr_address = GetPointerValue (cstr_address_type, true);
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if (cstr_address != LLDB_INVALID_ADDRESS)
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{
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DataExtractor data;
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size_t bytes_read = 0;
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std::vector<char> data_buffer;
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std::vector<char> cstr_buffer;
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size_t cstr_length;
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Error error;
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if (fixed_length > 0)
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{
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data_buffer.resize(fixed_length);
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// Resize the formatted buffer in case every character
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// uses the "\xXX" format and one extra byte for a NULL
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cstr_buffer.resize(data_buffer.size() * 4 + 1);
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data.SetData (&data_buffer.front(), data_buffer.size(), eByteOrderHost);
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bytes_read = process->ReadMemory (cstr_address, &data_buffer.front(), fixed_length, error);
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if (bytes_read > 0)
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{
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sstr << '"';
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cstr_length = data.Dump (&sstr,
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0, // Start offset in "data"
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eFormatChar, // Print as characters
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1, // Size of item (1 byte for a char!)
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bytes_read, // How many bytes to print?
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UINT32_MAX, // num per line
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LLDB_INVALID_ADDRESS,// base address
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0, // bitfield bit size
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0); // bitfield bit offset
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sstr << '"';
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}
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}
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else
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{
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const size_t k_max_buf_size = 256;
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data_buffer.resize (k_max_buf_size + 1);
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// NULL terminate in case we don't get the entire C string
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data_buffer.back() = '\0';
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// Make a formatted buffer that can contain take 4
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// bytes per character in case each byte uses the
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// "\xXX" format and one extra byte for a NULL
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cstr_buffer.resize (k_max_buf_size * 4 + 1);
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data.SetData (&data_buffer.front(), data_buffer.size(), eByteOrderHost);
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size_t total_cstr_len = 0;
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while ((bytes_read = process->ReadMemory (cstr_address, &data_buffer.front(), k_max_buf_size, error)) > 0)
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{
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size_t len = strlen(&data_buffer.front());
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if (len == 0)
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break;
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if (len > bytes_read)
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len = bytes_read;
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if (sstr.GetSize() == 0)
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sstr << '"';
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cstr_length = data.Dump (&sstr,
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0, // Start offset in "data"
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eFormatChar, // Print as characters
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1, // Size of item (1 byte for a char!)
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len, // How many bytes to print?
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UINT32_MAX, // num per line
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LLDB_INVALID_ADDRESS,// base address
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0, // bitfield bit size
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0); // bitfield bit offset
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if (len < k_max_buf_size)
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break;
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cstr_address += total_cstr_len;
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}
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if (sstr.GetSize() > 0)
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sstr << '"';
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}
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}
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}
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if (sstr.GetSize() > 0)
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m_summary_str.assign (sstr.GetData(), sstr.GetSize());
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}
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else if (ClangASTContext::IsFunctionPointerType (clang_type))
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{
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lldb::AddressType func_ptr_address_type = eAddressTypeInvalid;
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lldb::addr_t func_ptr_address = GetPointerValue (func_ptr_address_type, true);
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if (func_ptr_address != 0 && func_ptr_address != LLDB_INVALID_ADDRESS)
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{
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switch (func_ptr_address_type)
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{
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case eAddressTypeInvalid:
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case eAddressTypeFile:
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break;
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case eAddressTypeLoad:
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{
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Address so_addr;
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Target *target = exe_scope->CalculateTarget();
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if (target && target->GetSectionLoadList().IsEmpty() == false)
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{
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if (target->GetSectionLoadList().ResolveLoadAddress(func_ptr_address, so_addr))
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{
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so_addr.Dump (&sstr,
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exe_scope,
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Address::DumpStyleResolvedDescription,
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Address::DumpStyleSectionNameOffset);
|
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}
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}
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}
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break;
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case eAddressTypeHost:
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break;
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}
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}
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if (sstr.GetSize() > 0)
|
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{
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m_summary_str.assign (1, '(');
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m_summary_str.append (sstr.GetData(), sstr.GetSize());
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m_summary_str.append (1, ')');
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}
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}
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}
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}
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}
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if (m_summary_str.empty())
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return NULL;
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return m_summary_str.c_str();
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}
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const char *
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ValueObject::GetObjectDescription (ExecutionContextScope *exe_scope)
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{
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if (!m_object_desc_str.empty())
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return m_object_desc_str.c_str();
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|
|
if (!ClangASTContext::IsPointerType (GetOpaqueClangQualType()))
|
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return NULL;
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|
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if (!GetValueIsValid())
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return NULL;
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|
|
Process *process = exe_scope->CalculateProcess();
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|
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if (!process)
|
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return NULL;
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|
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Scalar scalar;
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|
|
if (!ClangASTType::GetValueAsScalar (GetClangAST(),
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GetOpaqueClangQualType(),
|
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GetDataExtractor(),
|
|
0,
|
|
GetByteSize(),
|
|
scalar))
|
|
return NULL;
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|
|
ExecutionContext exe_ctx;
|
|
exe_scope->Calculate(exe_ctx);
|
|
|
|
Value val(scalar);
|
|
val.SetContext(Value::eContextTypeOpaqueClangQualType,
|
|
ClangASTContext::GetVoidPtrType(GetClangAST(), false));
|
|
|
|
StreamString s;
|
|
// FIXME: Check the runtime this object belongs to and get the appropriate object printer for the object kind.
|
|
if (process->GetObjCObjectPrinter().PrintObject(s, val, exe_ctx))
|
|
{
|
|
m_object_desc_str.append (s.GetData());
|
|
}
|
|
return m_object_desc_str.c_str();
|
|
}
|
|
|
|
const char *
|
|
ValueObject::GetValueAsCString (ExecutionContextScope *exe_scope)
|
|
{
|
|
// If our byte size is zero this is an aggregate type that has children
|
|
if (ClangASTContext::IsAggregateType (GetOpaqueClangQualType()) == false)
|
|
{
|
|
if (UpdateValueIfNeeded(exe_scope))
|
|
{
|
|
if (m_value_str.empty())
|
|
{
|
|
const Value::ContextType context_type = m_value.GetContextType();
|
|
|
|
switch (context_type)
|
|
{
|
|
case Value::eContextTypeOpaqueClangQualType:
|
|
case Value::eContextTypeDCType:
|
|
case Value::eContextTypeDCVariable:
|
|
{
|
|
void *clang_type = GetOpaqueClangQualType ();
|
|
if (clang_type)
|
|
{
|
|
StreamString sstr;
|
|
lldb::Format format = ClangASTType::GetFormat(clang_type);
|
|
if (ClangASTType::DumpTypeValue(GetClangAST(), // The clang AST
|
|
clang_type, // The clang type to display
|
|
&sstr,
|
|
format, // Format to display this type with
|
|
m_data, // Data to extract from
|
|
0, // Byte offset into "m_data"
|
|
GetByteSize(), // Byte size of item in "m_data"
|
|
GetBitfieldBitSize(), // Bitfield bit size
|
|
GetBitfieldBitOffset())) // Bitfield bit offset
|
|
m_value_str.swap(sstr.GetString());
|
|
else
|
|
m_value_str.clear();
|
|
}
|
|
}
|
|
break;
|
|
|
|
case Value::eContextTypeDCRegisterInfo:
|
|
{
|
|
const RegisterInfo *reg_info = m_value.GetRegisterInfo();
|
|
if (reg_info)
|
|
{
|
|
StreamString reg_sstr;
|
|
m_data.Dump(®_sstr, 0, reg_info->format, reg_info->byte_size, 1, UINT32_MAX, LLDB_INVALID_ADDRESS, 0, 0);
|
|
m_value_str.swap(reg_sstr.GetString());
|
|
}
|
|
}
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!m_value_did_change && m_old_value_valid)
|
|
{
|
|
// The value was gotten successfully, so we consider the
|
|
// value as changed if the value string differs
|
|
SetValueDidChange (m_old_value_str != m_value_str);
|
|
}
|
|
}
|
|
}
|
|
if (m_value_str.empty())
|
|
return NULL;
|
|
return m_value_str.c_str();
|
|
}
|
|
|
|
addr_t
|
|
ValueObject::GetPointerValue (lldb::AddressType &address_type, bool scalar_is_load_address)
|
|
{
|
|
lldb::addr_t address = LLDB_INVALID_ADDRESS;
|
|
address_type = eAddressTypeInvalid;
|
|
switch (GetValue().GetValueType())
|
|
{
|
|
case Value::eValueTypeScalar:
|
|
if (scalar_is_load_address)
|
|
{
|
|
address = m_value.GetScalar().ULongLong(LLDB_INVALID_ADDRESS);
|
|
address_type = eAddressTypeLoad;
|
|
}
|
|
break;
|
|
|
|
case Value::eValueTypeLoadAddress:
|
|
case Value::eValueTypeFileAddress:
|
|
case Value::eValueTypeHostAddress:
|
|
{
|
|
uint32_t data_offset = 0;
|
|
address = m_data.GetPointer(&data_offset);
|
|
address_type = m_value.GetValueAddressType();
|
|
if (address_type == eAddressTypeInvalid)
|
|
address_type = eAddressTypeLoad;
|
|
}
|
|
break;
|
|
}
|
|
return address;
|
|
}
|
|
|
|
bool
|
|
ValueObject::SetValueFromCString (ExecutionContextScope *exe_scope, const char *value_str)
|
|
{
|
|
// Make sure our value is up to date first so that our location and location
|
|
// type is valid.
|
|
if (!UpdateValueIfNeeded(exe_scope))
|
|
return false;
|
|
|
|
uint32_t count = 0;
|
|
lldb::Encoding encoding = ClangASTType::GetEncoding (GetOpaqueClangQualType(), count);
|
|
|
|
char *end = NULL;
|
|
const size_t byte_size = GetByteSize();
|
|
switch (encoding)
|
|
{
|
|
case eEncodingInvalid:
|
|
return false;
|
|
|
|
case eEncodingUint:
|
|
if (byte_size > sizeof(unsigned long long))
|
|
{
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
unsigned long long ull_val = strtoull(value_str, &end, 0);
|
|
if (end && *end != '\0')
|
|
return false;
|
|
m_value = ull_val;
|
|
// Limit the bytes in our m_data appropriately.
|
|
m_value.GetScalar().GetData (m_data, byte_size);
|
|
}
|
|
break;
|
|
|
|
case eEncodingSint:
|
|
if (byte_size > sizeof(long long))
|
|
{
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
long long sll_val = strtoll(value_str, &end, 0);
|
|
if (end && *end != '\0')
|
|
return false;
|
|
m_value = sll_val;
|
|
// Limit the bytes in our m_data appropriately.
|
|
m_value.GetScalar().GetData (m_data, byte_size);
|
|
}
|
|
break;
|
|
|
|
case eEncodingIEEE754:
|
|
{
|
|
const off_t byte_offset = GetByteOffset();
|
|
uint8_t *dst = const_cast<uint8_t *>(m_data.PeekData(byte_offset, byte_size));
|
|
if (dst != NULL)
|
|
{
|
|
// We are decoding a float into host byte order below, so make
|
|
// sure m_data knows what it contains.
|
|
m_data.SetByteOrder(eByteOrderHost);
|
|
const size_t converted_byte_size = ClangASTContext::ConvertStringToFloatValue (
|
|
GetClangAST(),
|
|
GetOpaqueClangQualType(),
|
|
value_str,
|
|
dst,
|
|
byte_size);
|
|
|
|
if (converted_byte_size == byte_size)
|
|
{
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
case eEncodingVector:
|
|
return false;
|
|
|
|
default:
|
|
return false;
|
|
}
|
|
|
|
// If we have made it here the value is in m_data and we should write it
|
|
// out to the target
|
|
return Write ();
|
|
}
|
|
|
|
bool
|
|
ValueObject::Write ()
|
|
{
|
|
// Clear the update ID so the next time we try and read the value
|
|
// we try and read it again.
|
|
m_update_id = 0;
|
|
|
|
// TODO: when Value has a method to write a value back, call it from here.
|
|
return false;
|
|
|
|
}
|
|
|
|
void
|
|
ValueObject::AddSyntheticChild (const ConstString &key, ValueObjectSP& valobj_sp)
|
|
{
|
|
m_synthetic_children[key] = valobj_sp;
|
|
}
|
|
|
|
ValueObjectSP
|
|
ValueObject::GetSyntheticChild (const ConstString &key) const
|
|
{
|
|
ValueObjectSP synthetic_child_sp;
|
|
std::map<ConstString, ValueObjectSP>::const_iterator pos = m_synthetic_children.find (key);
|
|
if (pos != m_synthetic_children.end())
|
|
synthetic_child_sp = pos->second;
|
|
return synthetic_child_sp;
|
|
}
|
|
|
|
bool
|
|
ValueObject::IsPointerType ()
|
|
{
|
|
return ClangASTContext::IsPointerType (GetOpaqueClangQualType());
|
|
}
|
|
|
|
bool
|
|
ValueObject::IsPointerOrReferenceType ()
|
|
{
|
|
return ClangASTContext::IsPointerOrReferenceType(GetOpaqueClangQualType());
|
|
}
|
|
|
|
ValueObjectSP
|
|
ValueObject::GetSyntheticArrayMemberFromPointer (int32_t index, bool can_create)
|
|
{
|
|
ValueObjectSP synthetic_child_sp;
|
|
if (IsPointerType ())
|
|
{
|
|
char index_str[64];
|
|
snprintf(index_str, sizeof(index_str), "[%i]", index);
|
|
ConstString index_const_str(index_str);
|
|
// Check if we have already created a synthetic array member in this
|
|
// valid object. If we have we will re-use it.
|
|
synthetic_child_sp = GetSyntheticChild (index_const_str);
|
|
if (!synthetic_child_sp)
|
|
{
|
|
// We haven't made a synthetic array member for INDEX yet, so
|
|
// lets make one and cache it for any future reference.
|
|
synthetic_child_sp = CreateChildAtIndex(0, true, index);
|
|
|
|
// Cache the value if we got one back...
|
|
if (synthetic_child_sp)
|
|
AddSyntheticChild(index_const_str, synthetic_child_sp);
|
|
}
|
|
}
|
|
return synthetic_child_sp;
|
|
}
|