hanchenye-llvm-project/lldb/source/API/SBInstruction.cpp

//===-- SBInstruction.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/SBInstruction.h"

#include "lldb/API/SBAddress.h"
#include "lldb/API/SBFrame.h"
#include "lldb/API/SBInstruction.h"
#include "lldb/API/SBStream.h"
#include "lldb/API/SBTarget.h"

#include "lldb/Core/ArchSpec.h"
#include "lldb/Core/DataBufferHeap.h"
#include "lldb/Core/Disassembler.h"
#include "lldb/Core/EmulateInstruction.h"
#include "lldb/Core/StreamFile.h"
#include "lldb/Target/ExecutionContext.h"
#include "lldb/Target/StackFrame.h"
#include "lldb/Target/Target.h"

using namespace lldb;
using namespace lldb_private;

SBInstruction::SBInstruction ()
{
}

SBInstruction::SBInstruction (const lldb::InstructionSP& inst_sp) :
    m_opaque_sp (inst_sp)
{
}

SBInstruction::SBInstruction(const SBInstruction &rhs) :
    m_opaque_sp (rhs.m_opaque_sp)
{
}

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

SBInstruction::~SBInstruction ()
{
}

bool
SBInstruction::IsValid()
{
    return (m_opaque_sp.get() != NULL);
}

SBAddress
SBInstruction::GetAddress()
{
    SBAddress sb_addr;
    if (m_opaque_sp && m_opaque_sp->GetAddress().IsValid())
        sb_addr.SetAddress(&m_opaque_sp->GetAddress());
    return sb_addr;
}

const char *
SBInstruction::GetOpcodeName(SBTarget target)
{
    if (m_opaque_sp)
    {        
        Mutex::Locker api_locker;
        ExecutionContext exe_ctx;
        if (target.IsValid())
        {
            api_locker.Reset (target->GetAPIMutex().GetMutex());
            target->CalculateExecutionContext (exe_ctx);
            exe_ctx.SetProcessSP(target->GetProcessSP());
        }
        return m_opaque_sp->GetOpcodeName(exe_ctx.GetBestExecutionContextScope());
    }
    return NULL;
}

const char *
SBInstruction::GetMnemonics(SBTarget target)
{
    if (m_opaque_sp)
    {
        Mutex::Locker api_locker;
        ExecutionContext exe_ctx;
        if (target.IsValid())
        {
            api_locker.Reset (target->GetAPIMutex().GetMutex());
            target->CalculateExecutionContext (exe_ctx);
            exe_ctx.SetProcessSP(target->GetProcessSP());
        }
        return m_opaque_sp->GetMnemonics(exe_ctx.GetBestExecutionContextScope());
    }
    return NULL;
}

const char *
SBInstruction::GetComment(SBTarget target)
{
    if (m_opaque_sp)
    {
        Mutex::Locker api_locker;
        ExecutionContext exe_ctx;
        if (target.IsValid())
        {
            api_locker.Reset (target->GetAPIMutex().GetMutex());
            target->CalculateExecutionContext (exe_ctx);
            exe_ctx.SetProcessSP(target->GetProcessSP());
        }
        return m_opaque_sp->GetComment(exe_ctx.GetBestExecutionContextScope());
    }
    return NULL;
}

size_t
SBInstruction::GetByteSize ()
{
    if (m_opaque_sp)
        return m_opaque_sp->GetOpcode().GetByteSize();
    return 0;
}

SBData
SBInstruction::GetData (SBTarget target)
{
    lldb::SBData sb_data;
    if (m_opaque_sp)
    {
        const Opcode &opcode = m_opaque_sp->GetOpcode();
        const void *opcode_data = opcode.GetOpcodeBytes();
        const uint32_t opcode_data_size = opcode.GetByteSize();
        if (opcode_data && opcode_data_size > 0)
        {
            ByteOrder data_byte_order = opcode.GetDataByteOrder();
            if (data_byte_order == eByteOrderInvalid)
                data_byte_order = target->GetArchitecture().GetByteOrder();
            DataBufferSP data_buffer_sp (new DataBufferHeap (opcode_data, opcode_data_size));
            DataExtractorSP data_extractor_sp (new DataExtractor (data_buffer_sp, 
                                                                  data_byte_order,
                                                                  target.IsValid() ? target->GetArchitecture().GetAddressByteSize() : sizeof(void*)));
            sb_data.SetOpaque (data_extractor_sp);
        }
    }
    return sb_data;
}



bool
SBInstruction::DoesBranch ()
{
    if (m_opaque_sp)
        return m_opaque_sp->DoesBranch ();
    return false;
}

void
SBInstruction::SetOpaque (const lldb::InstructionSP &inst_sp)
{
    m_opaque_sp = inst_sp;
}

bool
SBInstruction::GetDescription (lldb::SBStream &s)
{
    if (m_opaque_sp)
    {
        // Use the "ref()" instead of the "get()" accessor in case the SBStream 
        // didn't have a stream already created, one will get created...
        m_opaque_sp->Dump (&s.ref(), 0, true, false, NULL, false);
        return true;
    }
    return false;
}

void
SBInstruction::Print (FILE *out)
{
    if (out == NULL)
        return;

    if (m_opaque_sp)
    {
        StreamFile out_stream (out, false);
        m_opaque_sp->Dump (&out_stream, 0, true, false, NULL, false);
    }
}

bool
SBInstruction::EmulateWithFrame (lldb::SBFrame &frame, uint32_t evaluate_options)
{
    if (m_opaque_sp && frame.get())
    {
        lldb_private::ExecutionContext exe_ctx;
        frame->CalculateExecutionContext (exe_ctx);
        lldb_private::Target *target = exe_ctx.GetTargetPtr();
        lldb_private::ArchSpec arch = target->GetArchitecture();
        
        return m_opaque_sp->Emulate (arch, 
                                     evaluate_options,
                                     (void *) frame.get(), 
                                     &lldb_private::EmulateInstruction::ReadMemoryFrame,
                                     &lldb_private::EmulateInstruction::WriteMemoryFrame,
                                     &lldb_private::EmulateInstruction::ReadRegisterFrame,
                                     &lldb_private::EmulateInstruction::WriteRegisterFrame);
    }
    return false;
}

bool
SBInstruction::DumpEmulation (const char *triple)
{
    if (m_opaque_sp && triple)
    {
        lldb_private::ArchSpec arch (triple, NULL);
        
        return m_opaque_sp->DumpEmulation (arch);
                                     
    }
    return false;
}

bool
SBInstruction::TestEmulation (lldb::SBStream &output_stream,  const char *test_file)
{
    if (!m_opaque_sp.get())
        m_opaque_sp.reset (new PseudoInstruction());
        
    return m_opaque_sp->TestEmulation (output_stream.get(), test_file);
}