C++ SBError类代码示例

int
main (int argc, char const *argv[], const char *envp[])
{
    SBDebugger::Initialize();
    
    SBHostOS::ThreadCreated ("<lldb.driver.main-thread>");

    signal (SIGPIPE, SIG_IGN);
    signal (SIGWINCH, sigwinch_handler);
    signal (SIGINT, sigint_handler);
    signal (SIGTSTP, sigtstp_handler);
    signal (SIGCONT, sigcont_handler);

    // Create a scope for driver so that the driver object will destroy itself
    // before SBDebugger::Terminate() is called.
    {
        Driver driver;

        bool exiting = false;
        SBError error (driver.ParseArgs (argc, argv, stdout, exiting));
        if (error.Fail())
        {
            const char *error_cstr = error.GetCString ();
            if (error_cstr)
                ::fprintf (stderr, "error: %s\n", error_cstr);
        }
        else if (!exiting)
        {
            driver.MainLoop ();
        }
    }

    SBDebugger::Terminate();
    return 0;
}

SBError
SBDebugger::RunREPL (lldb::LanguageType language, const char *repl_options)
{
    SBError error;
    if (m_opaque_sp)
        error.ref() = m_opaque_sp->RunREPL(language, repl_options);
    else
        error.SetErrorString ("invalid debugger");
    return error;
}

size_t
SBProcess::WriteMemory (addr_t addr, const void *src, size_t src_len, SBError &sb_error)
{
    size_t bytes_written = 0;

    LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));

    ProcessSP process_sp(GetSP());

    if (log)
    {
        log->Printf ("SBProcess(%p)::WriteMemory (addr=0x%llx, src=%p, dst_len=%zu, SBError (%p))...",
                     process_sp.get(), 
                     addr, 
                     src, 
                     src_len, 
                     sb_error.get());
    }

    if (process_sp)
    {
        Process::StopLocker stop_locker;
        if (stop_locker.TryLock(&process_sp->GetRunLock()))
        {
            Mutex::Locker api_locker (process_sp->GetTarget().GetAPIMutex());
            bytes_written = process_sp->WriteMemory (addr, src, src_len, sb_error.ref());
        }
        else
        {
            if (log)
                log->Printf ("SBProcess(%p)::WriteMemory() => error: process is running", process_sp.get());
            sb_error.SetErrorString("process is running");
        }
    }

    if (log)
    {
        SBStream sstr;
        sb_error.GetDescription (sstr);
        log->Printf ("SBProcess(%p)::WriteMemory (addr=0x%llx, src=%p, dst_len=%zu, SBError (%p): %s) => %zu", 
                     process_sp.get(), 
                     addr, 
                     src, 
                     src_len, 
                     sb_error.get(), 
                     sstr.GetData(),
                     bytes_written);
    }

    return bytes_written;
}

void
Driver::OptionData::AddInitialCommand (const char *command, bool before_file, bool is_file, SBError &error)
{
    std::vector<std::pair<bool, std::string> > *command_set;
    if (before_file)
        command_set = &(m_initial_commands);
    else
        command_set = &(m_after_file_commands);

    if (is_file)
    {
        SBFileSpec file(command);
        if (file.Exists())
            command_set->push_back (std::pair<bool, std::string> (true, optarg));
        else if (file.ResolveExecutableLocation())
        {
            char final_path[PATH_MAX];
            file.GetPath (final_path, sizeof(final_path));
            std::string path_str (final_path);
            command_set->push_back (std::pair<bool, std::string> (true, path_str));
        }
        else
            error.SetErrorStringWithFormat("file specified in --source (-s) option doesn't exist: '%s'", optarg);
    }
    else
        command_set->push_back (std::pair<bool, std::string> (false, optarg));
}

void
Driver::OptionData::AddInitialCommand (const char *command, CommandPlacement placement, bool is_file, SBError &error)
{
    std::vector<InitialCmdEntry> *command_set;
    switch (placement)
    {
    case eCommandPlacementBeforeFile:
        command_set = &(m_initial_commands);
        break;
    case eCommandPlacementAfterFile:
        command_set = &(m_after_file_commands);
        break;
    case eCommandPlacementAfterCrash:
        command_set = &(m_after_crash_commands);
        break;
    }

    if (is_file)
    {
        SBFileSpec file(command);
        if (file.Exists())
            command_set->push_back (InitialCmdEntry(command, is_file));
        else if (file.ResolveExecutableLocation())
        {
            char final_path[PATH_MAX];
            file.GetPath (final_path, sizeof(final_path));
            command_set->push_back (InitialCmdEntry(final_path, is_file));
        }
        else
            error.SetErrorStringWithFormat("file specified in --source (-s) option doesn't exist: '%s'", optarg);
    }
    else
        command_set->push_back (InitialCmdEntry(command, is_file));
}

SBThreadPlan
SBThreadPlan::QueueThreadPlanForStepInRange(SBAddress &sb_start_address,
                                            lldb::addr_t size, SBError &error) {
  if (m_opaque_sp) {
    Address *start_address = sb_start_address.get();
    if (!start_address) {
      return SBThreadPlan();
    }

    AddressRange range(*start_address, size);
    SymbolContext sc;
    start_address->CalculateSymbolContext(&sc);

    Status plan_status;
    SBThreadPlan plan =
        SBThreadPlan(m_opaque_sp->GetThread().QueueThreadPlanForStepInRange(
            false, range, sc, NULL, eAllThreads, plan_status));

    if (plan_status.Fail())
      error.SetErrorString(plan_status.AsCString());

    return plan;
  } else {
    return SBThreadPlan();
  }
}

bool
SBValue::SetData (lldb::SBData &data, SBError &error)
{
    Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
    ValueLocker locker;
    lldb::ValueObjectSP value_sp(GetSP(locker));
    bool ret = true;
    
    if (value_sp)
    {
        DataExtractor *data_extractor = data.get();
        
        if (!data_extractor)
        {
            if (log)
                log->Printf ("SBValue(%p)::SetData() => error: no data to set", value_sp.get());
            
            error.SetErrorString("No data to set");
            ret = false;
        }
        else
        {
            Error set_error;
            
            value_sp->SetData(*data_extractor, set_error);
            
            if (!set_error.Success())
            {
                error.SetErrorStringWithFormat("Couldn't set data: %s", set_error.AsCString());
                ret = false;
            }
        }
    }
    else
    {
        error.SetErrorStringWithFormat ("Couldn't set data: could not get SBValue: %s", locker.GetError().AsCString());
        ret = false;
    }
    
    if (log)
        log->Printf ("SBValue(%p)::SetData (%p) => %s",
                     value_sp.get(),
                     data.get(),
                     ret ? "true" : "false");
    return ret;
}

size_t
SBProcess::ReadMemory (addr_t addr, void *dst, size_t dst_len, SBError &sb_error)
{
    LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));

    size_t bytes_read = 0;

    if (log)
    {
        log->Printf ("SBProcess(%p)::ReadMemory (addr=0x%llx, dst=%p, dst_len=%zu, SBError (%p))...",
                     m_opaque_sp.get(), 
                     addr, 
                     dst, 
                     (uint32_t) dst_len, 
                     sb_error.get());
    }

    if (m_opaque_sp)
    {
        Error error;
        Mutex::Locker api_locker (m_opaque_sp->GetTarget().GetAPIMutex());
        bytes_read = m_opaque_sp->ReadMemory (addr, dst, dst_len, error);
        sb_error.SetError (error);
    }
    else
    {
        sb_error.SetErrorString ("SBProcess is invalid");
    }

    if (log)
    {
        SBStream sstr;
        sb_error.GetDescription (sstr);
        log->Printf ("SBProcess(%p)::ReadMemory (addr=0x%llx, dst=%p, dst_len=%zu, SBError (%p): %s) => %d", 
                     m_opaque_sp.get(), 
                     addr, 
                     dst, 
                     (uint32_t) dst_len, 
                     sb_error.get(), 
                     sstr.GetData(),
                     (uint32_t) bytes_read);
    }

    return bytes_read;
}

void listener_func() {
  while (!g_done) {
    SBEvent event;
    bool got_event = g_listener.WaitForEvent(1, event);
    if (got_event) {
      if (!event.IsValid())
        throw Exception("event is not valid in listener thread");

      SBProcess process = SBProcess::GetProcessFromEvent(event);
      if (process.GetState() == eStateStopped) {
        SBError error = process.Continue();
        if (!error.Success())
          throw Exception(string("Cannot continue process from listener thread: ")
                          + error.GetCString());
        g_process_started.push(true);
      }
    }
  }
}

uint64_t
SBValue::GetValueAsUnsigned(SBError& error, uint64_t fail_value)
{
    error.Clear();
    if (m_opaque_sp)
    {
        if (m_opaque_sp->GetUpdatePoint().GetTargetSP())
        {
            Mutex::Locker api_locker (m_opaque_sp->GetUpdatePoint().GetTargetSP()->GetAPIMutex());
            Scalar scalar;
            if (m_opaque_sp->ResolveValue (scalar))
                return scalar.GetRawBits64(fail_value);
            else
                error.SetErrorString("could not get value");
        }
        else
            error.SetErrorString("could not get target");
    }
    error.SetErrorString("invalid SBValue");
    return fail_value;
}

void SBThread::StepInto(const char *target_name, uint32_t end_line,
                        SBError &error, lldb::RunMode stop_other_threads) {
  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_API));

  std::unique_lock<std::recursive_mutex> lock;
  ExecutionContext exe_ctx(m_opaque_sp.get(), lock);

  if (log)
    log->Printf(
        "SBThread(%p)::StepInto (target_name='%s', stop_other_threads='%s')",
        static_cast<void *>(exe_ctx.GetThreadPtr()),
        target_name ? target_name : "<NULL>",
        Thread::RunModeAsCString(stop_other_threads));

  if (exe_ctx.HasThreadScope()) {
    bool abort_other_plans = false;

    Thread *thread = exe_ctx.GetThreadPtr();
    StackFrameSP frame_sp(thread->GetStackFrameAtIndex(0));
    ThreadPlanSP new_plan_sp;

    if (frame_sp && frame_sp->HasDebugInformation()) {
      SymbolContext sc(frame_sp->GetSymbolContext(eSymbolContextEverything));
      AddressRange range;
      if (end_line == LLDB_INVALID_LINE_NUMBER)
        range = sc.line_entry.range;
      else {
        if (!sc.GetAddressRangeFromHereToEndLine(end_line, range, error.ref()))
          return;
      }

      const LazyBool step_out_avoids_code_without_debug_info =
          eLazyBoolCalculate;
      const LazyBool step_in_avoids_code_without_debug_info =
          eLazyBoolCalculate;
      new_plan_sp = thread->QueueThreadPlanForStepInRange(
          abort_other_plans, range, sc, target_name, stop_other_threads,
          step_in_avoids_code_without_debug_info,
          step_out_avoids_code_without_debug_info);
    } else {
      new_plan_sp = thread->QueueThreadPlanForStepSingleInstruction(
          false, abort_other_plans, stop_other_threads);
    }

    error = ResumeNewPlan(exe_ctx, new_plan_sp.get());
  }
}

SBThreadPlan SBThreadPlan::QueueThreadPlanForRunToAddress(SBAddress sb_address,
                                                          SBError &error) {
  if (m_opaque_sp) {
    Address *address = sb_address.get();
    if (!address)
      return SBThreadPlan();

    Status plan_status;
    SBThreadPlan plan =
        SBThreadPlan(m_opaque_sp->GetThread().QueueThreadPlanForRunToAddress(
            false, *address, false, plan_status));

    if (plan_status.Fail())
      error.SetErrorString(plan_status.AsCString());

    return plan;
  } else {
    return SBThreadPlan();
  }
}

//.........这里部分代码省略.........
        commands_stream.Printf("target create --core %s\n", EscapeString(m_option_data.m_core_file).c_str());
    }
    else if (!m_option_data.m_process_name.empty())
    {
        commands_stream.Printf ("process attach --name %s", EscapeString(m_option_data.m_process_name).c_str());
        
        if (m_option_data.m_wait_for)
            commands_stream.Printf(" --waitfor");

        commands_stream.Printf("\n");

    }
    else if (LLDB_INVALID_PROCESS_ID != m_option_data.m_process_pid)
    {
        commands_stream.Printf ("process attach --pid %" PRIu64 "\n", m_option_data.m_process_pid);
    }

    WriteCommandsForSourcing(eCommandPlacementAfterFile, commands_stream);
    
    if (GetDebugMode())
    {
        result.PutError(m_debugger.GetErrorFileHandle());
        result.PutOutput(m_debugger.GetOutputFileHandle());
    }
    
    bool handle_events = true;
    bool spawn_thread = false;

    if (m_option_data.m_repl)
    {
        const char *repl_options = NULL;
        if (!m_option_data.m_repl_options.empty())
            repl_options = m_option_data.m_repl_options.c_str();
        SBError error (m_debugger.RunREPL(m_option_data.m_repl_lang, repl_options));
        if (error.Fail())
        {
            const char *error_cstr = error.GetCString();
            if (error_cstr && error_cstr[0])
                fprintf (stderr, "error: %s\n", error_cstr);
            else
                fprintf (stderr, "error: %u\n", error.GetError());
        }
    }
    else
    {
        // Check if we have any data in the commands stream, and if so, save it to a temp file
        // so we can then run the command interpreter using the file contents.
        const char *commands_data = commands_stream.GetData();
        const size_t commands_size = commands_stream.GetSize();

        // The command file might have requested that we quit, this variable will track that.
        bool quit_requested = false;
        bool stopped_for_crash = false;
        if (commands_data && commands_size)
        {
            int initial_commands_fds[2];
            bool success = true;
            FILE *commands_file = PrepareCommandsForSourcing (commands_data, commands_size, initial_commands_fds);
            if (commands_file)
            {
                m_debugger.SetInputFileHandle (commands_file, true);

                // Set the debugger into Sync mode when running the command file.  Otherwise command files
                // that run the target won't run in a sensible way.
                bool old_async = m_debugger.GetAsync();
                m_debugger.SetAsync(false);

SBError
Driver::ParseArgs (int argc, const char *argv[], FILE *out_fh, bool &exiting)
{
    ResetOptionValues ();

    SBCommandReturnObject result;

    SBError error;
    std::string option_string;
    struct option *long_options = NULL;
    std::vector<struct option> long_options_vector;
    uint32_t num_options;

    for (num_options = 0; g_options[num_options].long_option != NULL; ++num_options)
        /* Do Nothing. */;

    if (num_options == 0)
    {
        if (argc > 1)
            error.SetErrorStringWithFormat ("invalid number of options");
        return error;
    }

    BuildGetOptTable (g_options, long_options_vector, num_options);

    if (long_options_vector.empty())
        long_options = NULL;
    else
        long_options = &long_options_vector.front();

    if (long_options == NULL)
    {
        error.SetErrorStringWithFormat ("invalid long options");
        return error;
    }

    // Build the option_string argument for call to getopt_long_only.

    for (int i = 0; long_options[i].name != NULL; ++i)
    {
        if (long_options[i].flag == NULL)
        {
            option_string.push_back ((char) long_options[i].val);
            switch (long_options[i].has_arg)
            {
                default:
                case no_argument:
                    break;
                case required_argument:
                    option_string.push_back (':');
                    break;
                case optional_argument:
                    option_string.append ("::");
                    break;
            }
        }
    }

    // This is kind of a pain, but since we make the debugger in the Driver's constructor, we can't
    // know at that point whether we should read in init files yet.  So we don't read them in in the
    // Driver constructor, then set the flags back to "read them in" here, and then if we see the
    // "-n" flag, we'll turn it off again.  Finally we have to read them in by hand later in the
    // main loop.
    
    m_debugger.SkipLLDBInitFiles (false);
    m_debugger.SkipAppInitFiles (false);

    // Prepare for & make calls to getopt_long_only.
#if __GLIBC__
    optind = 0;
#else
    optreset = 1;
    optind = 1;
#endif
    int val;
    while (1)
    {
        int long_options_index = -1;
        val = ::getopt_long_only (argc, const_cast<char **>(argv), option_string.c_str(), long_options, &long_options_index);

        if (val == -1)
            break;
        else if (val == '?')
        {
            m_option_data.m_print_help = true;
            error.SetErrorStringWithFormat ("unknown or ambiguous option");
            break;
        }
        else if (val == 0)
            continue;
        else
        {
            m_option_data.m_seen_options.insert ((char) val);
            if (long_options_index == -1)
            {
                for (int i = 0;
                     long_options[i].name || long_options[i].has_arg || long_options[i].flag || long_options[i].val;
                     ++i)
                {
                    if (long_options[i].val == val)
//.........这里部分代码省略.........

int
main (int argc, char const *argv[])
{
    // Use a sentry object to properly initialize/terminate LLDB.
    LLDBSentry sentry;
    
    SBDebugger debugger (SBDebugger::Create());
    
    // Create a debugger instance so we can create a target
    if (!debugger.IsValid())
        fprintf (stderr, "error: failed to create a debugger object\n");
    
    bool show_usage = false;
    bool verbose = false;
    bool canonical = false;
    bool external_only = false;
    const char *arch = NULL;
    const char *platform = NULL;
    std::string short_options("h?");
    for (const struct option *opt = g_long_options; opt->name; ++opt)
    {
        if (isprint(opt->val))
        {
            short_options.append(1, (char)opt->val);
            switch (opt->has_arg)
            {
            case no_argument:
                break;
            case required_argument:
                short_options.append(1, ':'); 
                break;
            case optional_argument:
                short_options.append(2, ':'); 
                break;
            }   
        }        
    }
#ifdef __GLIBC__
    optind = 0;
#else
    optreset = 1;
    optind = 1;
#endif
    char ch;
	while ((ch = getopt_long_only(argc, (char * const *)argv, short_options.c_str(), g_long_options, 0)) != -1)
	{
		switch (ch) 
		{
        case 0:
            break;

		case 'a':
		    if (arch != NULL)
		    {
                fprintf (stderr, "error: the --arch option can only be specified once\n");
                exit(1);
		    }
            arch = optarg;
			break;

        case 'c':
            canonical = true;
            break;

        case 'x':
            external_only = true;
            break;
    
        case 'p':
            platform = optarg;
            break;            
        
        case 'v':
            verbose = true;
            break;

		case 'h':
		case '?':
		default:
			show_usage = true;
			break;
		}
	}
	argc -= optind;
	argv += optind;
    
    const bool add_dependent_libs = false;
    SBError error;
    for (int arg_idx = 0; arg_idx < argc; ++arg_idx)
    {
        // The first argument is the file path we want to look something up in
        const char *exe_file_path = argv[arg_idx];
        
        // Create a target using the executable.
        SBTarget target = debugger.CreateTarget (exe_file_path,
                                                 arch,
                                                 platform,
                                                 add_dependent_libs,
                                                 error);
        
//.........这里部分代码省略.........