Module: Byebug

Extended by:
Byebug
Includes:
Helpers::ReflectionHelper
Included in:
Byebug
Defined in:
lib/byebug/core.rb,
lib/byebug/frame.rb,
lib/byebug/errors.rb,
lib/byebug/remote.rb,
lib/byebug/runner.rb,
lib/byebug/command.rb,
lib/byebug/context.rb,
lib/byebug/history.rb,
lib/byebug/setting.rb,
lib/byebug/version.rb,
lib/byebug/attacher.rb,
lib/byebug/interface.rb,
lib/byebug/breakpoint.rb,
lib/byebug/commands/up.rb,
lib/byebug/helpers/bin.rb,
lib/byebug/helpers/var.rb,
lib/byebug/subcommands.rb,
lib/byebug/command_list.rb,
lib/byebug/commands/irb.rb,
lib/byebug/commands/pry.rb,
lib/byebug/commands/set.rb,
lib/byebug/commands/var.rb,
lib/byebug/helpers/eval.rb,
lib/byebug/helpers/file.rb,
lib/byebug/helpers/path.rb,
lib/byebug/commands/down.rb,
lib/byebug/commands/edit.rb,
lib/byebug/commands/help.rb,
lib/byebug/commands/info.rb,
lib/byebug/commands/kill.rb,
lib/byebug/commands/list.rb,
lib/byebug/commands/next.rb,
lib/byebug/commands/quit.rb,
lib/byebug/commands/save.rb,
lib/byebug/commands/show.rb,
lib/byebug/commands/skip.rb,
lib/byebug/commands/step.rb,
lib/byebug/helpers/frame.rb,
lib/byebug/helpers/parse.rb,
lib/byebug/option_setter.rb,
lib/byebug/printers/base.rb,
lib/byebug/remote/client.rb,
lib/byebug/remote/server.rb,
lib/byebug/commands/break.rb,
lib/byebug/commands/catch.rb,
lib/byebug/commands/debug.rb,
lib/byebug/commands/frame.rb,
lib/byebug/commands/where.rb,
lib/byebug/helpers/string.rb,
lib/byebug/helpers/thread.rb,
lib/byebug/helpers/toggle.rb,
lib/byebug/printers/plain.rb,
lib/byebug/settings/width.rb,
lib/byebug/commands/delete.rb,
lib/byebug/commands/enable.rb,
lib/byebug/commands/finish.rb,
lib/byebug/commands/method.rb,
lib/byebug/commands/source.rb,
lib/byebug/commands/thread.rb,
lib/byebug/commands/disable.rb,
lib/byebug/commands/display.rb,
lib/byebug/commands/history.rb,
lib/byebug/commands/restart.rb,
lib/byebug/commands/var/all.rb,
lib/byebug/settings/autoirb.rb,
lib/byebug/settings/autopry.rb,
lib/byebug/commands/continue.rb,
lib/byebug/commands/tracevar.rb,
lib/byebug/commands/var/args.rb,
lib/byebug/settings/autolist.rb,
lib/byebug/settings/autosave.rb,
lib/byebug/settings/basename.rb,
lib/byebug/settings/fullpath.rb,
lib/byebug/settings/histfile.rb,
lib/byebug/settings/histsize.rb,
lib/byebug/settings/listsize.rb,
lib/byebug/settings/savefile.rb,
lib/byebug/commands/condition.rb,
lib/byebug/commands/info/file.rb,
lib/byebug/commands/info/line.rb,
lib/byebug/commands/interrupt.rb,
lib/byebug/commands/undisplay.rb,
lib/byebug/commands/var/const.rb,
lib/byebug/commands/var/local.rb,
lib/byebug/helpers/reflection.rb,
lib/byebug/settings/callstyle.rb,
lib/byebug/settings/linetrace.rb,
lib/byebug/commands/untracevar.rb,
lib/byebug/commands/var/global.rb,
lib/byebug/commands/thread/list.rb,
lib/byebug/commands/thread/stop.rb,
lib/byebug/settings/post_mortem.rb,
lib/byebug/commands/info/display.rb,
lib/byebug/commands/info/program.rb,
lib/byebug/commands/var/instance.rb,
lib/byebug/source_file_formatter.rb,
lib/byebug/commands/thread/resume.rb,
lib/byebug/commands/thread/switch.rb,
lib/byebug/commands/enable/display.rb,
lib/byebug/commands/thread/current.rb,
lib/byebug/settings/stack_on_error.rb,
lib/byebug/commands/disable/display.rb,
lib/byebug/commands/info/breakpoints.rb,
lib/byebug/interfaces/test_interface.rb,
lib/byebug/interfaces/local_interface.rb,
lib/byebug/commands/enable/breakpoints.rb,
lib/byebug/interfaces/remote_interface.rb,
lib/byebug/interfaces/script_interface.rb,
lib/byebug/processors/script_processor.rb,
lib/byebug/commands/disable/breakpoints.rb,
lib/byebug/processors/command_processor.rb,
lib/byebug/processors/control_processor.rb,
lib/byebug/processors/post_mortem_processor.rb,
ext/byebug/byebug.c,
ext/byebug/byebug.c

Overview

Summary

This is a singleton class allows controlling byebug. Use it to start/stop byebug, set/remove breakpoints, etc.

Defined Under Namespace

Modules: Helpers, Printers, Remote, Subcommands Classes: AutoirbSetting, AutolistSetting, AutoprySetting, AutosaveSetting, BasenameSetting, BreakCommand, Breakpoint, CallstyleSetting, CatchCommand, Command, CommandList, CommandNotFound, CommandProcessor, ConditionCommand, Context, ContinueCommand, ControlProcessor, DebugCommand, DebugThread, DeleteCommand, DisableCommand, DisplayCommand, DownCommand, EditCommand, EnableCommand, FinishCommand, Frame, FrameCommand, FullpathSetting, HelpCommand, HistfileSetting, History, HistoryCommand, HistsizeSetting, InfoCommand, Interface, InterruptCommand, IrbCommand, KillCommand, LinetraceSetting, ListCommand, ListsizeSetting, LocalInterface, MethodCommand, NextCommand, OptionSetter, PostMortemProcessor, PostMortemSetting, PryCommand, QuitCommand, RemoteInterface, RestartCommand, Runner, SaveCommand, SavefileSetting, ScriptInterface, ScriptProcessor, SetCommand, Setting, ShowCommand, SkipCommand, SourceCommand, SourceFileFormatter, StackOnErrorSetting, StepCommand, TestInterface, ThreadCommand, ThreadsTable, TracevarCommand, UndisplayCommand, UntracevarCommand, UpCommand, VarCommand, WhereCommand, WidthSetting

Constant Summary collapse

PORT =

Port number used for remote debugging

8989
VERSION = 
"12.0.0"

Class Attribute Summary collapse

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Helpers::ReflectionHelper

#commands

Class Attribute Details

.wait_connection ⇒ Object

If in remote mode, wait for the remote connection



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# File 'lib/byebug/remote.rb', line 17

def wait_connection
  @wait_connection
end

Instance Attribute Details

#displays ⇒ Object

Debugger’s display expressions



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# File 'lib/byebug/core.rb', line 31

def displays
  @displays
end

#init_file ⇒ Object

Configuration file used for startup commands. Default value is .byebugrc



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# File 'lib/byebug/core.rb', line 25

def init_file
  @init_file
end

#mode ⇒ Object

Running mode of the debugger. Can be either:

  • :attached => Attached to a running program through the ‘byebug` method.

  • :standalone => Started through ‘byebug` script.

  • :off => Ignoring any ‘byebug` method calls.



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# File 'lib/byebug/core.rb', line 41

def mode
  @mode
end

Class Method Details

.actual_control_port ⇒ Object

The actual port that the control server is started at



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# File 'lib/byebug/remote.rb', line 25

def actual_control_port
  control.actual_port
end

.actual_port ⇒ Object

The actual port that the server is started at



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# File 'lib/byebug/remote.rb', line 20

def actual_port
  server.actual_port
end

.add_catchpoint(exception) ⇒ Exception

Adds a new exception to the catchpoints hash.

Returns:



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# File 'ext/byebug/byebug.c', line 850

static VALUE
Add_catchpoint(VALUE self, VALUE value)
{
  UNUSED(self);

  if (TYPE(value) != T_STRING)
    rb_raise(rb_eTypeError, "value of a catchpoint must be String");

  rb_hash_aset(catchpoints, rb_str_dup(value), INT2FIX(0));
  return value;
}

.attach ⇒ Object

Starts byebug, and stops at the first line of user’s code.



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# File 'lib/byebug/attacher.rb', line 10

def self.attach
  unless started?
    self.mode = :attached

    start
    run_init_script
  end

  current_context.step_out(3, true)
end

.breakpoints ⇒ Array

Returns an array of breakpoints.

Returns:

  • (Array) 


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# File 'ext/byebug/byebug.c', line 27

static VALUE
Breakpoints(VALUE self)
{
  UNUSED(self);

  if (NIL_P(breakpoints))
    breakpoints = rb_ary_new();

  return breakpoints;
}

.catchpoints ⇒ Hash

Returns the catchpoints hash.

Returns:

  • (Hash) 


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# File 'ext/byebug/byebug.c', line 44

static VALUE
Catchpoints(VALUE self)
{
  UNUSED(self);

  return catchpoints;
}

.contexts ⇒ Array

Returns an array of all contexts.

Returns:

  • (Array) 


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# File 'ext/byebug/byebug.c', line 546

static VALUE
Contexts(VALUE self)
{
  volatile VALUE list;
  volatile VALUE new_list;
  VALUE context;
  threads_table_t *t_tbl;
  debug_context_t *dc;
  int i;

  UNUSED(self);

  check_started();

  new_list = rb_ary_new();
  list = rb_funcall(rb_cThread, rb_intern("list"), 0);

  for (i = 0; i < RARRAY_LENINT(list); i++)
  {
    VALUE thread = rb_ary_entry(list, i);

    thread_context_lookup(thread, &context);
    rb_ary_push(new_list, context);
  }

  Data_Get_Struct(threads, threads_table_t, t_tbl);
  st_clear(t_tbl->tbl);

  for (i = 0; i < RARRAY_LENINT(new_list); i++)
  {
    context = rb_ary_entry(new_list, i);
    Data_Get_Struct(context, debug_context_t, dc);
    st_insert(t_tbl->tbl, dc->thread, context);
  }

  return new_list;
}

.current_context ⇒ Object

Returns the current context.

<i>Note:</i> Byebug.current_context.thread == Thread.current



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# File 'ext/byebug/byebug.c', line 611

static VALUE
Current_context(VALUE self)
{
  VALUE context;

  UNUSED(self);

  thread_context_lookup(rb_thread_current(), &context);

  return context;
}

.debug_load(file, stop = false) ⇒ nil

Same as Kernel#load but resets current context’s frames. stop parameter forces byebug to stop at the first line of code in file

Returns:

  • (nil) 


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# File 'ext/byebug/byebug.c', line 724

static VALUE
Debug_load(int argc, VALUE *argv, VALUE self)
{
  VALUE file, stop, context;
  debug_context_t *dc;
  VALUE status = Qnil;
  int state = 0;

  UNUSED(self);

  if (rb_scan_args(argc, argv, "11", &file, &stop) == 1)
    stop = Qfalse;

  Start(self);

  context = Current_context(self);
  Data_Get_Struct(context, debug_context_t, dc);

  dc->calced_stack_size = 1;

  if (RTEST(stop))
    dc->steps = 1;

  rb_load_protect(file, 0, &state);
  if (0 != state)
  {
    status = rb_errinfo();
    byebug_reset_stepping_stop_points(dc);
  }

  return status;
}

.handle_post_mortem ⇒ Object

Saves information about the unhandled exception and gives a byebug prompt back to the user before program termination.



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# File 'lib/byebug/core.rb', line 76

def self.handle_post_mortem
  return unless raised_exception

  context = raised_exception.__bb_context

  PostMortemProcessor.new(context).at_line
end

.interrupt ⇒ Object

Interrupts the current thread



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# File 'lib/byebug/remote.rb', line 32

def interrupt
  current_context.interrupt
end

.load_settings ⇒ Object 



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# File 'lib/byebug/core.rb', line 61

def self.load_settings
  Dir.glob(File.join(__dir__, "settings", "*.rb")).each do |file|
    require file
  end

  constants.grep(/[a-z]Setting/).map do |name|
    setting = const_get(name).new
    Byebug::Setting.settings[setting.to_sym] = setting
  end
end

.lock ⇒ Thread.current

Locks global switch to reserve execution to current thread exclusively.

Returns:

  • (Thread.current) 


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# File 'ext/byebug/threads.c', line 204

static VALUE
Lock(VALUE self)
{
  debug_context_t *dc;
  VALUE context;

  UNUSED(self);

  if (!is_living_thread(rb_thread_current()))
    rb_raise(rb_eRuntimeError, "Current thread is dead!");

  thread_context_lookup(rb_thread_current(), &context);
  Data_Get_Struct(context, debug_context_t, dc);

  acquire_lock(dc);

  CTX_FL_UNSET(dc, CTX_FL_IGNORE);

  return locker;
}

.parse_host_and_port(host_port_spec) ⇒ Object 



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# File 'lib/byebug/remote.rb', line 59

def parse_host_and_port(host_port_spec)
  location = host_port_spec.split(":")
  location[1] ? [location[0], location[1].to_i] : ["localhost", location[0]]
end

.post_mortem=(bool) ⇒ Object

Sets post-moterm flag.



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# File 'ext/byebug/byebug.c', line 835

static VALUE
Set_post_mortem(VALUE self, VALUE value)
{
  UNUSED(self);

  post_mortem = RTEST(value) ? Qtrue : Qfalse;
  return value;
}

.post_mortem? ⇒ Boolean

Returns true if post-mortem debugging is enabled.

Returns:

  • (Boolean) 


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# File 'ext/byebug/byebug.c', line 821

static VALUE
Post_mortem(VALUE self)
{
  UNUSED(self);

  return post_mortem;
}

.raised_exception ⇒ Exception

Returns raised exception when in post_mortem mode.

Returns:



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# File 'ext/byebug/byebug.c', line 58

static VALUE
Raised_exception(VALUE self)
{
  UNUSED(self);

  return raised_exception;
}

.spawn(host = "localhost", port = nil) ⇒ Object 



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# File 'lib/byebug/attacher.rb', line 21

def self.spawn(host = "localhost", port = nil)
  require_relative "core"

  self.wait_connection = true
  start_server(host, port || PORT)
end

.start ⇒ Boolean

The return value is the value of !Byebug.started? before issuing the start; That is, true is returned, unless byebug was previously started.

Returns:

  • (Boolean) 


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# File 'ext/byebug/byebug.c', line 702

static VALUE
Start(VALUE self)
{
  if (IS_STARTED)
    return Qfalse;

  catchpoints = rb_hash_new();

  threads = create_threads_table();

  register_tracepoints(self);

  return Qtrue;
}

.start_client(host = "localhost", port = PORT) ⇒ Object

Connects to the remote byebug



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# File 'lib/byebug/remote.rb', line 55

def start_client(host = "localhost", port = PORT)
  client.start(host, port)
end

.start_control(host = nil, port = PORT + 1) ⇒ Object

Starts the remote server control thread



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# File 'lib/byebug/remote.rb', line 48

def start_control(host = nil, port = PORT + 1)
  control.start(host, port)
end

.start_server(host = nil, port = PORT) ⇒ Object

Starts the remote server main thread



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# File 'lib/byebug/remote.rb', line 39

def start_server(host = nil, port = PORT)
  start_control(host, port.zero? ? 0 : port + 1)

  server.start(host, port)
end

.started? ⇒ Boolean

Returns true byebug is started.

Returns:

  • (Boolean) 


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# File 'ext/byebug/byebug.c', line 629

static VALUE
Started(VALUE self)
{
  UNUSED(self);

  return IS_STARTED ? Qtrue : Qfalse;
}

.stop ⇒ Boolean

This method disables byebug. It returns true if byebug was already disabled, otherwise it returns false.

Returns:

  • (Boolean) 


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# File 'ext/byebug/byebug.c', line 644

static VALUE
Stop(VALUE self)
{
  UNUSED(self);

  if (IS_STARTED)
  {
    clear_tracepoints(self);

    breakpoints = Qnil;
    catchpoints = Qnil;

    return Qfalse;
  }

  return Qtrue;
}

.stoppable? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'ext/byebug/byebug.c', line 662

static VALUE
Stoppable(VALUE self)
{
  VALUE context;
  debug_context_t *dc;

  if (!IS_STARTED)
    return Qfalse;

  if (!NIL_P(breakpoints) && rb_funcall(breakpoints, idEmpty, 0) == Qfalse)
    return Qfalse;

  if (!NIL_P(catchpoints) && rb_funcall(catchpoints, idEmpty, 0) == Qfalse)
    return Qfalse;

  if (post_mortem == Qtrue)
    return Qfalse;

  if (RTEST(tracing))
    return Qfalse;

  context = Current_context(self);
  if (!NIL_P(context))
  {
    Data_Get_Struct(context, debug_context_t, dc);

    if (dc->steps > 0)
      return Qfalse;
  }

  return Qtrue;
}

.thread_context(thread) ⇒ Object

Returns context of the thread passed as an argument.



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# File 'ext/byebug/byebug.c', line 590

static VALUE
Thread_context(VALUE self, VALUE thread)
{
  VALUE context;

  UNUSED(self);

  check_started();

  thread_context_lookup(thread, &context);

  return context;
}

.tracing=(bool) ⇒ Object

Sets the global tracing flag.



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# File 'ext/byebug/byebug.c', line 777

static VALUE
Set_tracing(VALUE self, VALUE value)
{
  UNUSED(self);

  tracing = RTEST(value) ? Qtrue : Qfalse;
  return value;
}

.tracing? ⇒ Boolean

Returns true if global tracing is enabled.

Returns:

  • (Boolean) 


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# File 'ext/byebug/byebug.c', line 763

static VALUE
Tracing(VALUE self)
{
  UNUSED(self);

  return tracing;
}

.unlock ⇒ nil

Unlocks global switch so other threads can run.

Returns:

  • (nil) 


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# File 'ext/byebug/threads.c', line 180

static VALUE
Unlock(VALUE self)
{
  debug_context_t *dc;
  VALUE context;

  UNUSED(self);

  thread_context_lookup(rb_thread_current(), &context);
  Data_Get_Struct(context, debug_context_t, dc);

  CTX_FL_SET(dc, CTX_FL_IGNORE);

  release_lock();

  return locker;
}

.verbose=(bool) ⇒ Object

Sets the global verbose flag for TracePoint API events is enabled.



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# File 'ext/byebug/byebug.c', line 806

static VALUE
Set_verbose(VALUE self, VALUE value)
{
  UNUSED(self);

  verbose = RTEST(value) ? Qtrue : Qfalse;
  return value;
}

.verbose? ⇒ Boolean

Returns true if global verbose flag for TracePoint API events is enabled.

Returns:

  • (Boolean) 


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# File 'ext/byebug/byebug.c', line 792

static VALUE
Verbose(VALUE self)
{
  UNUSED(self);

  return verbose;
}

Instance Method Details

#run_init_script ⇒ Object

Runs normal byebug initialization scripts.

Reads and executes the commands from init file (if any) in the current working directory. This is only done if the current directory is different from your home directory. Thus, you can have more than one init file, one generic in your home directory, and another, specific to the program you are debugging, in the directory where you invoke byebug.



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# File 'lib/byebug/core.rb', line 52

def run_init_script
  rc_dirs.each do |dir|
    rc_file = File.expand_path(File.join(dir, init_file))
    next unless File.exist?(rc_file)

    run_rc_file(rc_file)
  end
end
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