source/API/SBFrame.cpp

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

#include "lldb/API/SBFrame.h"

#include <string>
#include <algorithm>

#include "lldb/lldb-types.h"

#include "lldb/Core/Address.h"
#include "lldb/Core/ConstString.h"
#include "lldb/Core/Log.h"
#include "lldb/Core/Stream.h"
#include "lldb/Core/StreamFile.h"
#include "lldb/Core/ValueObjectRegister.h"
#include "lldb/Core/ValueObjectVariable.h"
#include "lldb/Expression/ClangUserExpression.h"
#include "lldb/Host/Host.h"
#include "lldb/Symbol/Block.h"
#include "lldb/Symbol/SymbolContext.h"
#include "lldb/Symbol/VariableList.h"
#include "lldb/Symbol/Variable.h"
#include "lldb/Target/ExecutionContext.h"
#include "lldb/Target/Target.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/RegisterContext.h"
#include "lldb/Target/StackFrame.h"
#include "lldb/Target/StackID.h"
#include "lldb/Target/Thread.h"

#include "lldb/API/SBDebugger.h"
#include "lldb/API/SBValue.h"
#include "lldb/API/SBAddress.h"
#include "lldb/API/SBStream.h"
#include "lldb/API/SBSymbolContext.h"
#include "lldb/API/SBThread.h"

using namespace lldb;
using namespace lldb_private;


SBFrame::SBFrame () :
    m_opaque_sp (new ExecutionContextRef())
{
}

SBFrame::SBFrame (const StackFrameSP &lldb_object_sp) :
    m_opaque_sp (new ExecutionContextRef (lldb_object_sp))
{
    LogSP log(GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));

    if (log)
    {
        SBStream sstr;
        GetDescription (sstr);
        log->Printf ("SBFrame::SBFrame (sp=%p) => SBFrame(%p): %s", 
                     lldb_object_sp.get(), lldb_object_sp.get(), sstr.GetData());
                     
    }
}

SBFrame::SBFrame(const SBFrame &rhs) :
    m_opaque_sp (new ExecutionContextRef (*rhs.m_opaque_sp))
{
}

const SBFrame &
SBFrame::operator = (const SBFrame &rhs)
{
    if (this != &rhs)
        *m_opaque_sp = *rhs.m_opaque_sp;
    return *this;
}

SBFrame::~SBFrame()
{
}

StackFrameSP
SBFrame::GetFrameSP() const
{
    if (m_opaque_sp)
        return m_opaque_sp->GetFrameSP();
    return StackFrameSP();
}

void
SBFrame::SetFrameSP (const StackFrameSP &lldb_object_sp)
{
    return m_opaque_sp->SetFrameSP(lldb_object_sp);
}

bool
SBFrame::IsValid() const
{
    return GetFrameSP().get() != NULL;
}

SBSymbolContext
SBFrame::GetSymbolContext (uint32_t resolve_scope) const
{
    LogSP log(GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
    SBSymbolContext sb_sym_ctx;
    Mutex::Locker api_locker;
    ExecutionContext exe_ctx (m_opaque_sp.get(), api_locker);

    StackFrame *frame = exe_ctx.GetFramePtr();
    Target *target = exe_ctx.GetTargetPtr();
    if (frame && target)
    {
        Process::StopLocker stop_locker;
        if (stop_locker.TryLock(&exe_ctx.GetProcessPtr()->GetRunLock()))
        {
            sb_sym_ctx.SetSymbolContext(&frame->GetSymbolContext (resolve_scope));
        }
        else
        {
            if (log)
                log->Printf ("SBFrame(%p)::GetSymbolContext () => error: process is running", frame);
        }
    }

    if (log)
        log->Printf ("SBFrame(%p)::GetSymbolContext (resolve_scope=0x%8.8x) => SBSymbolContext(%p)", 
                     frame, resolve_scope, sb_sym_ctx.get());

    return sb_sym_ctx;
}

SBModule
SBFrame::GetModule () const
{
    LogSP log(GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
    SBModule sb_module;
    ModuleSP module_sp;
    Mutex::Locker api_locker;
    ExecutionContext exe_ctx (m_opaque_sp.get(), api_locker);

    StackFrame *frame = exe_ctx.GetFramePtr();
    Target *target = exe_ctx.GetTargetPtr();
    if (frame && target)
    {
        Process::StopLocker stop_locker;
        if (stop_locker.TryLock(&exe_ctx.GetProcessPtr()->GetRunLock()))
        {
            module_sp = frame->GetSymbolContext (eSymbolContextModule).module_sp;
            sb_module.SetSP (module_sp);
        }
        else
        {
            if (log)
                log->Printf ("SBFrame(%p)::GetModule () => error: process is running", frame);
        }
    }

    if (log)
        log->Printf ("SBFrame(%p)::GetModule () => SBModule(%p)", 
                     frame, module_sp.get());

    return sb_module;
}

SBCompileUnit
SBFrame::GetCompileUnit () const
{
    LogSP log(GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
    SBCompileUnit sb_comp_unit;
    Mutex::Locker api_locker;
    ExecutionContext exe_ctx (m_opaque_sp.get(), api_locker);

    StackFrame *frame = exe_ctx.GetFramePtr();
    Target *target = exe_ctx.GetTargetPtr();
    if (frame && target)
    {
        Process::StopLocker stop_locker;
        if (stop_locker.TryLock(&exe_ctx.GetProcessPtr()->GetRunLock()))
        {
            sb_comp_unit.reset (frame->GetSymbolContext (eSymbolContextCompUnit).comp_unit);
        }
        else
        {
            if (log)
                log->Printf ("SBFrame(%p)::GetCompileUnit () => error: process is running", frame);
        }
    }
    if (log)
        log->Printf ("SBFrame(%p)::GetCompileUnit () => SBCompileUnit(%p)", 
                     frame, sb_comp_unit.get());

    return sb_comp_unit;
}

SBFunction
SBFrame::GetFunction () const
{
    LogSP log(GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
    SBFunction sb_function;
    Mutex::Locker api_locker;
    ExecutionContext exe_ctx (m_opaque_sp.get(), api_locker);

    StackFrame *frame = exe_ctx.GetFramePtr();
    Target *target = exe_ctx.GetTargetPtr();
    if (frame && target)
    {
        Process::StopLocker stop_locker;
        if (stop_locker.TryLock(&exe_ctx.GetProcessPtr()->GetRunLock()))
        {
            sb_function.reset(frame->GetSymbolContext (eSymbolContextFunction).function);
        }
        else
        {
            if (log)
                log->Printf ("SBFrame(%p)::GetFunction () => error: process is running", frame);
        }
    }
    if (log)
        log->Printf ("SBFrame(%p)::GetFunction () => SBFunction(%p)", 
                     frame, sb_function.get());

    return sb_function;
}

SBSymbol
SBFrame::GetSymbol () const
{
    LogSP log(GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
    SBSymbol sb_symbol;
    Mutex::Locker api_locker;
    ExecutionContext exe_ctx (m_opaque_sp.get(), api_locker);

    StackFrame *frame = exe_ctx.GetFramePtr();
    Target *target = exe_ctx.GetTargetPtr();
    if (frame && target)
    {
        Process::StopLocker stop_locker;
        if (stop_locker.TryLock(&exe_ctx.GetProcessPtr()->GetRunLock()))
        {
            sb_symbol.reset(frame->GetSymbolContext (eSymbolContextSymbol).symbol);
        }
        else
        {
            if (log)
                log->Printf ("SBFrame(%p)::GetSymbol () => error: process is running", frame);
        }
    }
    if (log)
        log->Printf ("SBFrame(%p)::GetSymbol () => SBSymbol(%p)", 
                     frame, sb_symbol.get());
    return sb_symbol;
}

SBBlock
SBFrame::GetBlock () const
{
    LogSP log(GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
    SBBlock sb_block;
    Mutex::Locker api_locker;
    ExecutionContext exe_ctx (m_opaque_sp.get(), api_locker);

    StackFrame *frame = exe_ctx.GetFramePtr();
    Target *target = exe_ctx.GetTargetPtr();
    if (frame && target)
    {
        Process::StopLocker stop_locker;
        if (stop_locker.TryLock(&exe_ctx.GetProcessPtr()->GetRunLock()))
        {
            sb_block.SetPtr (frame->GetSymbolContext (eSymbolContextBlock).block);
        }
        else
        {
            if (log)
                log->Printf ("SBFrame(%p)::GetBlock () => error: process is running", frame);
        }
    }
    if (log)
        log->Printf ("SBFrame(%p)::GetBlock () => SBBlock(%p)", 
                     frame, sb_block.GetPtr());
    return sb_block;
}

SBBlock
SBFrame::GetFrameBlock () const
{
    SBBlock sb_block;
    Mutex::Locker api_locker;
    ExecutionContext exe_ctx (m_opaque_sp.get(), api_locker);

    StackFrame *frame = exe_ctx.GetFramePtr();
    Target *target = exe_ctx.GetTargetPtr();
    LogSP log(GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
    if (frame && target)
    {
        Process::StopLocker stop_locker;
        if (stop_locker.TryLock(&exe_ctx.GetProcessPtr()->GetRunLock()))
        {
            sb_block.SetPtr(frame->GetFrameBlock ());
        }
        else
        {
            if (log)
                log->Printf ("SBFrame(%p)::GetFrameBlock () => error: process is running", frame);
        }
    }
    if (log)
        log->Printf ("SBFrame(%p)::GetFrameBlock () => SBBlock(%p)", 
                     frame, sb_block.GetPtr());
    return sb_block;    
}

SBLineEntry
SBFrame::GetLineEntry () const
{
    LogSP log(GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
    SBLineEntry sb_line_entry;
    Mutex::Locker api_locker;
    ExecutionContext exe_ctx (m_opaque_sp.get(), api_locker);

    StackFrame *frame = exe_ctx.GetFramePtr();
    Target *target = exe_ctx.GetTargetPtr();
    if (frame && target)
    {
        Process::StopLocker stop_locker;
        if (stop_locker.TryLock(&exe_ctx.GetProcessPtr()->GetRunLock()))
        {
            sb_line_entry.SetLineEntry (frame->GetSymbolContext (eSymbolContextLineEntry).line_entry);
        }
        else
        {
            if (log)
                log->Printf ("SBFrame(%p)::GetLineEntry () => error: process is running", frame);
        }
    }
    if (log)
        log->Printf ("SBFrame(%p)::GetLineEntry () => SBLineEntry(%p)", 
                     frame, sb_line_entry.get());
    return sb_line_entry;
}

uint32_t
SBFrame::GetFrameID () const
{
    uint32_t frame_idx = UINT32_MAX;
    
    ExecutionContext exe_ctx(m_opaque_sp.get());
    StackFrame *frame = exe_ctx.GetFramePtr();
    if (frame)
        frame_idx = frame->GetFrameIndex ();
    
    LogSP log(GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
    if (log)
        log->Printf ("SBFrame(%p)::GetFrameID () => %u", 
                     frame, frame_idx);
    return frame_idx;
}

addr_t
SBFrame::GetPC () const
{
    LogSP log(GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
    addr_t addr = LLDB_INVALID_ADDRESS;
    Mutex::Locker api_locker;
    ExecutionContext exe_ctx (m_opaque_sp.get(), api_locker);

    StackFrame *frame = exe_ctx.GetFramePtr();
    Target *target = exe_ctx.GetTargetPtr();
    if (frame && target)
    {
        Process::StopLocker stop_locker;
        if (stop_locker.TryLock(&exe_ctx.GetProcessPtr()->GetRunLock()))
        {
            addr = frame->GetFrameCodeAddress().GetOpcodeLoadAddress (target);
        }
        else
        {
            if (log)
                log->Printf ("SBFrame(%p)::GetPC () => error: process is running", frame);
        }
    }

    if (log)
        log->Printf ("SBFrame(%p)::GetPC () => 0x%llx", frame, addr);

    return addr;
}

bool
SBFrame::SetPC (addr_t new_pc)
{
    LogSP log(GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
    bool ret_val = false;
    Mutex::Locker api_locker;
    ExecutionContext exe_ctx (m_opaque_sp.get(), api_locker);

    StackFrame *frame = exe_ctx.GetFramePtr();
    Target *target = exe_ctx.GetTargetPtr();
    if (frame && target)
    {
        Process::StopLocker stop_locker;
        if (stop_locker.TryLock(&exe_ctx.GetProcessPtr()->GetRunLock()))
        {
            ret_val = frame->GetRegisterContext()->SetPC (new_pc);
        }
        else
        {
            if (log)
                log->Printf ("SBFrame(%p)::SetPC () => error: process is running", frame);
        }
    }

    if (log)
        log->Printf ("SBFrame(%p)::SetPC (new_pc=0x%llx) => %i", 
                     frame, new_pc, ret_val);

    return ret_val;
}

addr_t
SBFrame::GetSP () const
{
    LogSP log(GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
    addr_t addr = LLDB_INVALID_ADDRESS;
    Mutex::Locker api_locker;
    ExecutionContext exe_ctx (m_opaque_sp.get(), api_locker);

    StackFrame *frame = exe_ctx.GetFramePtr();
    Target *target = exe_ctx.GetTargetPtr();
    if (frame && target)
    {
        Process::StopLocker stop_locker;
        if (stop_locker.TryLock(&exe_ctx.GetProcessPtr()->GetRunLock()))
        {
            addr = frame->GetRegisterContext()->GetSP();
        }
        else
        {
            if (log)
                log->Printf ("SBFrame(%p)::GetSP () => error: process is running", frame);
        }
    }
    if (log)
        log->Printf ("SBFrame(%p)::GetSP () => 0x%llx", frame, addr);

    return addr;
}


addr_t
SBFrame::GetFP () const
{
    LogSP log(GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
    addr_t addr = LLDB_INVALID_ADDRESS;
    Mutex::Locker api_locker;
    ExecutionContext exe_ctx (m_opaque_sp.get(), api_locker);

    StackFrame *frame = exe_ctx.GetFramePtr();
    Target *target = exe_ctx.GetTargetPtr();
    if (frame && target)
    {
        Process::StopLocker stop_locker;
        if (stop_locker.TryLock(&exe_ctx.GetProcessPtr()->GetRunLock()))
        {
            addr = frame->GetRegisterContext()->GetFP();
        }
        else
        {
            if (log)
                log->Printf ("SBFrame(%p)::GetFP () => error: process is running", frame);
        }
    }

    if (log)
        log->Printf ("SBFrame(%p)::GetFP () => 0x%llx", frame, addr);
    return addr;
}


SBAddress
SBFrame::GetPCAddress () const
{
    LogSP log(GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
    SBAddress sb_addr;
    Mutex::Locker api_locker;
    ExecutionContext exe_ctx (m_opaque_sp.get(), api_locker);

    StackFrame *frame = exe_ctx.GetFramePtr();
    Target *target = exe_ctx.GetTargetPtr();
    if (frame && target)
    {
        Process::StopLocker stop_locker;
        if (stop_locker.TryLock(&exe_ctx.GetProcessPtr()->GetRunLock()))
        {
            sb_addr.SetAddress (&frame->GetFrameCodeAddress());
        }
        else
        {
            if (log)
                log->Printf ("SBFrame(%p)::GetPCAddress () => error: process is running", frame);
        }
    }
    if (log)
        log->Printf ("SBFrame(%p)::GetPCAddress () => SBAddress(%p)", frame, sb_addr.get());
    return sb_addr;
}

void
SBFrame::Clear()
{
    m_opaque_sp->Clear();
}

lldb::SBValue
SBFrame::GetValueForVariablePath (const char *var_path)
{
    SBValue sb_value;
    ExecutionContext exe_ctx(m_opaque_sp.get());
    StackFrame *frame = exe_ctx.GetFramePtr();
    Target *target = exe_ctx.GetTargetPtr();
    if (frame && target)
    {
        lldb::DynamicValueType  use_dynamic = frame->CalculateTarget()->GetPreferDynamicValue();
        sb_value = GetValueForVariablePath (var_path, use_dynamic);
    }
    return sb_value;
}

lldb::SBValue
SBFrame::GetValueForVariablePath (const char *var_path, DynamicValueType use_dynamic)
{
    SBValue sb_value;
    Mutex::Locker api_locker;
    ExecutionContext exe_ctx (m_opaque_sp.get(), api_locker);

    StackFrame *frame = exe_ctx.GetFramePtr();
    Target *target = exe_ctx.GetTargetPtr();
    if (frame && target && var_path && var_path[0])
    {
        Process::StopLocker stop_locker;
        if (stop_locker.TryLock(&exe_ctx.GetProcessPtr()->GetRunLock()))
        {
            VariableSP var_sp;
            Error error;
            ValueObjectSP value_sp (frame->GetValueForVariableExpressionPath (var_path, 
                                                                              use_dynamic,
                                                                              StackFrame::eExpressionPathOptionCheckPtrVsMember | StackFrame::eExpressionPathOptionsAllowDirectIVarAccess,
                                                                              var_sp,
                                                                              error));
            sb_value.SetSP(value_sp);
        }
        else
        {
            LogSP log(GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
            if (log)
                log->Printf ("SBFrame(%p)::GetValueForVariablePath () => error: process is running", frame);
        }
    }
    return sb_value;
}

SBValue
SBFrame::FindVariable (const char *name)
{
    SBValue value;
    ExecutionContext exe_ctx(m_opaque_sp.get());
    StackFrame *frame = exe_ctx.GetFramePtr();
    Target *target = exe_ctx.GetTargetPtr();
    if (frame && target)
    {
        lldb::DynamicValueType  use_dynamic = frame->CalculateTarget()->GetPreferDynamicValue();
        value = FindVariable (name, use_dynamic);
    }
    return value;
}
                                    

SBValue
SBFrame::FindVariable (const char *name, lldb::DynamicValueType use_dynamic)
{
    LogSP log(GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
    VariableSP var_sp;
    SBValue sb_value;
    ValueObjectSP value_sp;
    Mutex::Locker api_locker;
    ExecutionContext exe_ctx (m_opaque_sp.get(), api_locker);

    StackFrame *frame = exe_ctx.GetFramePtr();
    Target *target = exe_ctx.GetTargetPtr();
    if (frame && target && name && name[0])
    {
        Process::StopLocker stop_locker;
        if (stop_locker.TryLock(&exe_ctx.GetProcessPtr()->GetRunLock()))
        {
            VariableList variable_list;
            SymbolContext sc (frame->GetSymbolContext (eSymbolContextBlock));

            if (sc.block)
            {
                const bool can_create = true;
                const bool get_parent_variables = true;
                const bool stop_if_block_is_inlined_function = true;
                
                if (sc.block->AppendVariables (can_create, 
                                               get_parent_variables,
                                               stop_if_block_is_inlined_function,
                                               &variable_list))
                {
                    var_sp = variable_list.FindVariable (ConstString(name));
                }
            }

            if (var_sp)
            {
                value_sp = frame->GetValueObjectForFrameVariable(var_sp, use_dynamic);
                sb_value.SetSP(value_sp);
            }
        }
        else
        {
            if (log)
                log->Printf ("SBFrame(%p)::FindVariable () => error: process is running", frame);
        }
    }
    
    if (log)
        log->Printf ("SBFrame(%p)::FindVariable (name=\"%s\") => SBValue(%p)", 
                     frame, name, value_sp.get());

    return sb_value;
}

SBValue
SBFrame::FindValue (const char *name, ValueType value_type)
{
    SBValue value;
    ExecutionContext exe_ctx(m_opaque_sp.get());
    StackFrame *frame = exe_ctx.GetFramePtr();
    Target *target = exe_ctx.GetTargetPtr();
    if (frame && target)
    {
        lldb::DynamicValueType use_dynamic = frame->CalculateTarget()->GetPreferDynamicValue();
        value = FindValue (name, value_type, use_dynamic);
    }
    return value;
}

SBValue
SBFrame::FindValue (const char *name, ValueType value_type, lldb::DynamicValueType use_dynamic)
{
    LogSP log(GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
    SBValue sb_value;
    ValueObjectSP value_sp;
    Mutex::Locker api_locker;
    ExecutionContext exe_ctx (m_opaque_sp.get(), api_locker);

    StackFrame *frame = exe_ctx.GetFramePtr();
    Target *target = exe_ctx.GetTargetPtr();
    if (frame && target && name && name[0])
    {
        Process::StopLocker stop_locker;
        if (stop_locker.TryLock(&exe_ctx.GetProcessPtr()->GetRunLock()))
        {
            switch (value_type)
            {
            case eValueTypeVariableGlobal:      // global variable
            case eValueTypeVariableStatic:      // static variable
            case eValueTypeVariableArgument:    // function argument variables
            case eValueTypeVariableLocal:       // function local variables
                {
                    VariableList *variable_list = frame->GetVariableList(true);

                    SymbolContext sc (frame->GetSymbolContext (eSymbolContextBlock));

                    const bool can_create = true;
                    const bool get_parent_variables = true;
                    const bool stop_if_block_is_inlined_function = true;

                    if (sc.block && sc.block->AppendVariables (can_create, 
                                                               get_parent_variables,
                                                               stop_if_block_is_inlined_function,
                                                               variable_list))
                    {
                        ConstString const_name(name);
                        const uint32_t num_variables = variable_list->GetSize();
                        for (uint32_t i = 0; i < num_variables; ++i)
                        {
                            VariableSP variable_sp (variable_list->GetVariableAtIndex(i));
                            if (variable_sp && 
                                variable_sp->GetScope() == value_type &&
                                variable_sp->GetName() == const_name)
                            {
                                value_sp = frame->GetValueObjectForFrameVariable (variable_sp, use_dynamic);
                                sb_value.SetSP (value_sp);
                                break;
                            }
                        }
                    }
                }
                break;

            case eValueTypeRegister:            // stack frame register value
                {
                    RegisterContextSP reg_ctx (frame->GetRegisterContext());
                    if (reg_ctx)
                    {
                        const uint32_t num_regs = reg_ctx->GetRegisterCount();
                        for (uint32_t reg_idx = 0; reg_idx < num_regs; ++reg_idx)
                        {
                            const RegisterInfo *reg_info = reg_ctx->GetRegisterInfoAtIndex (reg_idx);
                            if (reg_info && 
                                ((reg_info->name && strcasecmp (reg_info->name, name) == 0) ||
                                 (reg_info->alt_name && strcasecmp (reg_info->alt_name, name) == 0)))
                            {
                                value_sp = ValueObjectRegister::Create (frame, reg_ctx, reg_idx);
                                sb_value.SetSP (value_sp);
                                break;
                            }
                        }
                    }
                }
                break;

            case eValueTypeRegisterSet:         // A collection of stack frame register values
                {
                    RegisterContextSP reg_ctx (frame->GetRegisterContext());
                    if (reg_ctx)
                    {
                        const uint32_t num_sets = reg_ctx->GetRegisterSetCount();
                        for (uint32_t set_idx = 0; set_idx < num_sets; ++set_idx)
                        {
                            const RegisterSet *reg_set = reg_ctx->GetRegisterSet (set_idx);
                            if (reg_set && 
                                ((reg_set->name && strcasecmp (reg_set->name, name) == 0) ||
                                 (reg_set->short_name && strcasecmp (reg_set->short_name, name) == 0)))
                            {
                                value_sp = ValueObjectRegisterSet::Create (frame, reg_ctx, set_idx);
                                sb_value.SetSP (value_sp);
                                break;
                            }
                        }
                    }
                }
                break;

            case eValueTypeConstResult:         // constant result variables
                {
                    ConstString const_name(name);
                    ClangExpressionVariableSP expr_var_sp (target->GetPersistentVariables().GetVariable (const_name));
                    if (expr_var_sp)
                    {
                        value_sp = expr_var_sp->GetValueObject();
                        sb_value.SetSP (value_sp);
                    }
                }
                break;

            default:
                break;
            }
        }
        else
        {
            if (log)
                log->Printf ("SBFrame(%p)::FindValue () => error: process is running", frame);
        }
    }
    
    if (log)
        log->Printf ("SBFrame(%p)::FindVariableInScope (name=\"%s\", value_type=%i) => SBValue(%p)", 
                     frame, name, value_type, value_sp.get());

    
    return sb_value;
}

bool
SBFrame::IsEqual (const SBFrame &that) const
{
    lldb::StackFrameSP this_sp = GetFrameSP();
    lldb::StackFrameSP that_sp = that.GetFrameSP();
    return (this_sp && that_sp && this_sp->GetStackID() == that_sp->GetStackID());
}

bool
SBFrame::operator == (const SBFrame &rhs) const
{
    return IsEqual(rhs);
}

bool
SBFrame::operator != (const SBFrame &rhs) const
{
    return !IsEqual(rhs);
}

SBThread
SBFrame::GetThread () const
{
    LogSP log(GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));

    ExecutionContext exe_ctx(m_opaque_sp.get());
    ThreadSP thread_sp (exe_ctx.GetThreadSP());
    SBThread sb_thread (thread_sp);

    if (log)
    {
        SBStream sstr;
        sb_thread.GetDescription (sstr);
        log->Printf ("SBFrame(%p)::GetThread () => SBThread(%p): %s", 
                     exe_ctx.GetFramePtr(), 
                     thread_sp.get(), 
                     sstr.GetData());
    }

    return sb_thread;
}

const char *
SBFrame::Disassemble () const
{
    LogSP log(GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
    const char *disassembly = NULL;
    Mutex::Locker api_locker;
    ExecutionContext exe_ctx (m_opaque_sp.get(), api_locker);

    StackFrame *frame = exe_ctx.GetFramePtr();
    Target *target = exe_ctx.GetTargetPtr();
    if (frame && target)
    {
        Process::StopLocker stop_locker;
        if (stop_locker.TryLock(&exe_ctx.GetProcessPtr()->GetRunLock()))
        {
            disassembly = frame->Disassemble();
        }
        else
        {
            if (log)
                log->Printf ("SBFrame(%p)::Disassemble () => error: process is running", frame);
        }            
    }

    if (log)
        log->Printf ("SBFrame(%p)::Disassemble () => %s", frame, disassembly);

    return disassembly;
}


SBValueList
SBFrame::GetVariables (bool arguments,
                       bool locals,
                       bool statics,
                       bool in_scope_only)
{
    SBValueList value_list;
    ExecutionContext exe_ctx(m_opaque_sp.get());
    StackFrame *frame = exe_ctx.GetFramePtr();
    Target *target = exe_ctx.GetTargetPtr();
    if (frame && target)
    {
        lldb::DynamicValueType use_dynamic = frame->CalculateTarget()->GetPreferDynamicValue();
        value_list = GetVariables (arguments, locals, statics, in_scope_only, use_dynamic);
    }
    return value_list;
}

SBValueList
SBFrame::GetVariables (bool arguments,
                       bool locals,
                       bool statics,
                       bool in_scope_only,
                       lldb::DynamicValueType  use_dynamic)
{
    LogSP log(GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));

    SBValueList value_list;
    Mutex::Locker api_locker;
    ExecutionContext exe_ctx (m_opaque_sp.get(), api_locker);

    StackFrame *frame = exe_ctx.GetFramePtr();
    Target *target = exe_ctx.GetTargetPtr();

    if (log)
        log->Printf ("SBFrame(%p)::GetVariables (arguments=%i, locals=%i, statics=%i, in_scope_only=%i)", 
                     frame, 
                     arguments,
                     locals,
                     statics,
                     in_scope_only);
    
    if (frame && target)
    {
        Process::StopLocker stop_locker;
        if (stop_locker.TryLock(&exe_ctx.GetProcessPtr()->GetRunLock()))
        {

            size_t i;
            VariableList *variable_list = NULL;
            variable_list = frame->GetVariableList(true);
            if (variable_list)
            {
                const size_t num_variables = variable_list->GetSize();
                if (num_variables)
                {
                    for (i = 0; i < num_variables; ++i)
                    {
                        VariableSP variable_sp (variable_list->GetVariableAtIndex(i));
                        if (variable_sp)
                        {
                            bool add_variable = false;
                            switch (variable_sp->GetScope())
                            {
                            case eValueTypeVariableGlobal:
                            case eValueTypeVariableStatic:
                                add_variable = statics;
                                break;

                            case eValueTypeVariableArgument:
                                add_variable = arguments;
                                break;

                            case eValueTypeVariableLocal:
                                add_variable = locals;
                                break;

                            default:
                                break;
                            }
                            if (add_variable)
                            {
                                if (in_scope_only && !variable_sp->IsInScope(frame))
                                    continue;

                                value_list.Append(frame->GetValueObjectForFrameVariable (variable_sp, use_dynamic));
                            }
                        }
                    }
                }
            }
        }
        else
        {
            if (log)
                log->Printf ("SBFrame(%p)::GetVariables () => error: process is running", frame);
        }            
    }

    if (log)
    {
        log->Printf ("SBFrame(%p)::GetVariables (...) => SBValueList(%p)", frame,
                     value_list.get());
    }

    return value_list;
}

SBValueList
SBFrame::GetRegisters ()
{
    LogSP log(GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));

    SBValueList value_list;
    Mutex::Locker api_locker;
    ExecutionContext exe_ctx (m_opaque_sp.get(), api_locker);

    StackFrame *frame = exe_ctx.GetFramePtr();
    Target *target = exe_ctx.GetTargetPtr();
    if (frame && target)
    {
        Process::StopLocker stop_locker;
        if (stop_locker.TryLock(&exe_ctx.GetProcessPtr()->GetRunLock()))
        {
            RegisterContextSP reg_ctx (frame->GetRegisterContext());
            if (reg_ctx)
            {
                const uint32_t num_sets = reg_ctx->GetRegisterSetCount();
                for (uint32_t set_idx = 0; set_idx < num_sets; ++set_idx)
                {
                    value_list.Append(ValueObjectRegisterSet::Create (frame, reg_ctx, set_idx));
                }
            }
        }
        else
        {
            if (log)
                log->Printf ("SBFrame(%p)::GetRegisters () => error: process is running", frame);
        }            
    }

    if (log)
        log->Printf ("SBFrame(%p)::GetRegisters () => SBValueList(%p)", frame, value_list.get());

    return value_list;
}

bool
SBFrame::GetDescription (SBStream &description)
{
    Stream &strm = description.ref();

    Mutex::Locker api_locker;
    ExecutionContext exe_ctx (m_opaque_sp.get(), api_locker);

    StackFrame *frame = exe_ctx.GetFramePtr();
    Target *target = exe_ctx.GetTargetPtr();
    if (frame && target)
    {
        Process::StopLocker stop_locker;
        if (stop_locker.TryLock(&exe_ctx.GetProcessPtr()->GetRunLock()))
        {
            frame->DumpUsingSettingsFormat (&strm);
        }
        else
        {
            LogSP log(GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
            if (log)
                log->Printf ("SBFrame(%p)::GetDescription () => error: process is running", frame);
        }            

    }
    else
        strm.PutCString ("No value");

    return true;
}

SBValue
SBFrame::EvaluateExpression (const char *expr)
{
    SBValue result;
    ExecutionContext exe_ctx(m_opaque_sp.get());
    StackFrame *frame = exe_ctx.GetFramePtr();
    Target *target = exe_ctx.GetTargetPtr();
    if (frame && target)
    {
        lldb::DynamicValueType use_dynamic = frame->CalculateTarget()->GetPreferDynamicValue();
        result = EvaluateExpression (expr, use_dynamic);
    }
    return result;
}

SBValue
SBFrame::EvaluateExpression (const char *expr, lldb::DynamicValueType fetch_dynamic_value)
{
    return EvaluateExpression (expr, fetch_dynamic_value, true);
}

SBValue
SBFrame::EvaluateExpression (const char *expr, lldb::DynamicValueType fetch_dynamic_value, bool unwind_on_error)
{
    LogSP log(GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
    
    LogSP expr_log(GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));

    ExecutionResults exe_results = eExecutionSetupError;
    SBValue expr_result;
    ValueObjectSP expr_value_sp;

    Mutex::Locker api_locker;
    ExecutionContext exe_ctx (m_opaque_sp.get(), api_locker);

    StackFrame *frame = exe_ctx.GetFramePtr();
    Target *target = exe_ctx.GetTargetPtr();
    if (log)
        log->Printf ("SBFrame(%p)::EvaluateExpression (expr=\"%s\")...", frame, expr);

    if (frame && target)
    {            
        Process::StopLocker stop_locker;
        if (stop_locker.TryLock(&exe_ctx.GetProcessPtr()->GetRunLock()))
        {
#ifdef LLDB_CONFIGURATION_DEBUG
            StreamString frame_description;
            frame->DumpUsingSettingsFormat (&frame_description);
            Host::SetCrashDescriptionWithFormat ("SBFrame::EvaluateExpression (expr = \"%s\", fetch_dynamic_value = %u) %s",
                                                 expr, fetch_dynamic_value, frame_description.GetString().c_str());
#endif
            const bool coerce_to_id = false;
            const bool keep_in_memory = false;

            exe_results = target->EvaluateExpression (expr, 
                                                      frame,
                                                      eExecutionPolicyOnlyWhenNeeded,
                                                      coerce_to_id,
                                                      unwind_on_error, 
                                                      keep_in_memory, 
                                                      fetch_dynamic_value, 
                                                      expr_value_sp);
            expr_result.SetSP(expr_value_sp);
#ifdef LLDB_CONFIGURATION_DEBUG
            Host::SetCrashDescription (NULL);
#endif
        }
        else
        {
            if (log)
                log->Printf ("SBFrame(%p)::EvaluateExpression () => error: process is running", frame);
        }            
    }

#ifndef LLDB_DISABLE_PYTHON
    if (expr_log)
        expr_log->Printf("** [SBFrame::EvaluateExpression] Expression result is %s, summary %s **", 
                         expr_result.GetValue(), 
                         expr_result.GetSummary());
    
    if (log)
        log->Printf ("SBFrame(%p)::EvaluateExpression (expr=\"%s\") => SBValue(%p) (execution result=%d)", 
                     frame, 
                     expr, 
                     expr_value_sp.get(),
                     exe_results);
#endif

    return expr_result;
}

bool
SBFrame::IsInlined()
{
    ExecutionContext exe_ctx(m_opaque_sp.get());
    StackFrame *frame = exe_ctx.GetFramePtr();
    Target *target = exe_ctx.GetTargetPtr();
    if (frame && target)
    {
        Process::StopLocker stop_locker;
        if (stop_locker.TryLock(&exe_ctx.GetProcessPtr()->GetRunLock()))
        {

            Block *block = frame->GetSymbolContext(eSymbolContextBlock).block;
            if (block)
                return block->GetContainingInlinedBlock () != NULL;
        }
        else
        {
            LogSP log(GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
            if (log)
                log->Printf ("SBFrame(%p)::IsInlined () => error: process is running", frame);
        }            

    }
    return false;
}

const char *
SBFrame::GetFunctionName()
{
    const char *name = NULL;
    ExecutionContext exe_ctx(m_opaque_sp.get());
    StackFrame *frame = exe_ctx.GetFramePtr();
    Target *target = exe_ctx.GetTargetPtr();
    if (frame && target)
    {
        Process::StopLocker stop_locker;
        if (stop_locker.TryLock(&exe_ctx.GetProcessPtr()->GetRunLock()))
        {
            SymbolContext sc (frame->GetSymbolContext(eSymbolContextFunction | eSymbolContextBlock | eSymbolContextSymbol));
            if (sc.block)
            {
                Block *inlined_block = sc.block->GetContainingInlinedBlock ();
                if (inlined_block)
                {
                    const InlineFunctionInfo* inlined_info = inlined_block->GetInlinedFunctionInfo();
                    name = inlined_info->GetName().AsCString();
                }
            }
            
            if (name == NULL)
            {
                if (sc.function)
                    name = sc.function->GetName().GetCString();
            }

            if (name == NULL)
            {
                if (sc.symbol)
                    name = sc.symbol->GetName().GetCString();
            }
        }
        else
        {
            LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
            if (log)
                log->Printf ("SBFrame(%p)::GetFunctionName() => error: process is running", frame);

        }
    }
    return name;
}