author | wenzelm |
Tue, 14 Mar 2017 00:09:15 +0100 | |
changeset 65219 | ed4b47b8c7dc |
parent 65218 | 102b8e092860 |
child 65222 | fb8253564483 |
permissions | -rw-r--r-- |
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/* Title: Pure/Tools/debugger.scala |
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Author: Makarius |
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Interactive debugger for Isabelle/ML. |
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*/ |
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package isabelle |
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import scala.collection.immutable.SortedMap |
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object Debugger |
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{ |
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/* thread context */ |
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case object Update |
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sealed case class Debug_State(pos: Position.T, function: String) |
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type Threads = SortedMap[String, List[Debug_State]] |
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sealed case class Context(thread_name: String, debug_states: List[Debug_State], index: Int = 0) |
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{ |
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def size: Int = debug_states.length + 1 |
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def reset: Context = copy(index = 0) |
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def select(i: Int) = copy(index = i + 1) |
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def thread_state: Option[Debug_State] = debug_states.headOption |
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def stack_state: Option[Debug_State] = |
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if (1 <= index && index <= debug_states.length) |
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Some(debug_states(index - 1)) |
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else None |
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def debug_index: Option[Int] = |
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if (stack_state.isDefined) Some(index - 1) |
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else if (debug_states.nonEmpty) Some(0) |
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else None |
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def debug_state: Option[Debug_State] = stack_state orElse thread_state |
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def debug_position: Option[Position.T] = debug_state.map(_.pos) |
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override def toString: String = |
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stack_state match { |
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case None => thread_name |
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case Some(d) => d.function |
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} |
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} |
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/* debugger state */ |
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sealed case class State( |
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session: Session, |
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active: Int = 0, // active views |
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break: Boolean = false, // break at next possible breakpoint |
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active_breakpoints: Set[Long] = Set.empty, // explicit breakpoint state |
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threads: Threads = SortedMap.empty, // thread name ~> stack of debug states |
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focus: Map[String, Context] = Map.empty, // thread name ~> focus |
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output: Map[String, Command.Results] = Map.empty) // thread name ~> output messages |
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{ |
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def set_break(b: Boolean): State = copy(break = b) |
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def is_active: Boolean = active > 0 && session.is_ready |
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def inc_active: State = copy(active = active + 1) |
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def dec_active: State = copy(active = active - 1) |
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def toggle_breakpoint(breakpoint: Long): (Boolean, State) = |
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{ |
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val active_breakpoints1 = |
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if (active_breakpoints(breakpoint)) active_breakpoints - breakpoint |
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else active_breakpoints + breakpoint |
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(active_breakpoints1(breakpoint), copy(active_breakpoints = active_breakpoints1)) |
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} |
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def get_thread(thread_name: String): List[Debug_State] = |
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threads.getOrElse(thread_name, Nil) |
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def update_thread(thread_name: String, debug_states: List[Debug_State]): State = |
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{ |
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val threads1 = |
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if (debug_states.nonEmpty) threads + (thread_name -> debug_states) |
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else threads - thread_name |
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val focus1 = |
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focus.get(thread_name) match { |
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case Some(c) if debug_states.nonEmpty => |
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focus + (thread_name -> Context(thread_name, debug_states)) |
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case _ => focus - thread_name |
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} |
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copy(threads = threads1, focus = focus1) |
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} |
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def set_focus(c: Context): State = copy(focus = focus + (c.thread_name -> c)) |
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def get_output(thread_name: String): Command.Results = |
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output.getOrElse(thread_name, Command.Results.empty) |
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def add_output(thread_name: String, entry: Command.Results.Entry): State = |
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copy(output = output + (thread_name -> (get_output(thread_name) + entry))) |
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def clear_output(thread_name: String): State = |
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copy(output = output - thread_name) |
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} |
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/* protocol handler */ |
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def get(session: Session): Option[Debugger] = |
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session.get_protocol_handler("isabelle.Debugger$Handler") match { |
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case Some(handler: Handler) => handler.get_debugger |
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case _ => None |
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} |
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def apply(session: Session): Debugger = |
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get(session) getOrElse error("Debugger not initialized") |
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class Handler extends Session.Protocol_Handler |
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{ |
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private val _debugger_ = Synchronized[Option[Debugger]](None) |
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def get_debugger: Option[Debugger] = _debugger_.value |
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def the_debugger: Debugger = get_debugger getOrElse error("Debugger not initialized") |
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override def init(session: Session) |
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{ |
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_debugger_.change( |
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{ |
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case None => Some(new Debugger(session)) |
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case Some(_) => error("Debugger already initialized") |
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}) |
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} |
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private def debugger_state(msg: Prover.Protocol_Output): Boolean = |
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{ |
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msg.properties match { |
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case Markup.Debugger_State(thread_name) => |
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val msg_body = |
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YXML.parse_body_failsafe(Symbol.decode(UTF8.decode_permissive(msg.bytes))) |
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val debug_states = |
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{ |
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import XML.Decode._ |
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list(pair(properties, Symbol.decode_string))(msg_body).map({ |
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case (pos, function) => Debug_State(pos, function) |
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}) |
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} |
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the_debugger.update_thread(thread_name, debug_states) |
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true |
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case _ => false |
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} |
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} |
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private def debugger_output(msg: Prover.Protocol_Output): Boolean = |
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{ |
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msg.properties match { |
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case Markup.Debugger_Output(thread_name) => |
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YXML.parse_body_failsafe(Symbol.decode(UTF8.decode_permissive(msg.bytes))) match { |
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case List(XML.Elem(Markup(name, props @ Markup.Serial(i)), body)) => |
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val debugger = the_debugger |
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val message = XML.Elem(Markup(Markup.message(name), props), body) |
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debugger.add_output(thread_name, i -> debugger.session.xml_cache.elem(message)) |
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true |
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case _ => false |
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} |
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case _ => false |
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} |
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} |
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val functions = |
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List( |
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Markup.DEBUGGER_STATE -> debugger_state _, |
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Markup.DEBUGGER_OUTPUT -> debugger_output _) |
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} |
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} |
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class Debugger private(val session: Session) |
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{ |
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/* debugger state */ |
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private val state = Synchronized(Debugger.State(session)) |
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private val delay_update = |
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Standard_Thread.delay_first(session.output_delay) { |
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session.debugger_updates.post(Debugger.Update) |
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} |
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/* protocol commands */ |
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def update_thread(thread_name: String, debug_states: List[Debugger.Debug_State]) |
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{ |
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state.change(_.update_thread(thread_name, debug_states)) |
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delay_update.invoke() |
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} |
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def add_output(thread_name: String, entry: Command.Results.Entry) |
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{ |
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state.change(_.add_output(thread_name, entry)) |
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delay_update.invoke() |
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} |
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def is_active(): Boolean = state.value.is_active |
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def init(): Unit = |
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state.change(st => |
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{ |
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val st1 = st.inc_active |
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if (!st.is_active && st1.is_active) |
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session.protocol_command("Debugger.init") |
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st1 |
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}) |
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def exit(): Unit = |
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state.change(st => |
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{ |
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val st1 = st.dec_active |
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if (st.is_active && !st1.is_active) |
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session.protocol_command("Debugger.exit") |
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st1 |
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}) |
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def is_break(): Boolean = state.value.break |
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def set_break(b: Boolean) |
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{ |
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state.change(st => { |
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val st1 = st.set_break(b) |
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session.protocol_command("Debugger.break", b.toString) |
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st1 |
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}) |
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delay_update.invoke() |
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} |
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def active_breakpoint_state(breakpoint: Long): Option[Boolean] = |
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{ |
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val st = state.value |
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if (st.is_active) Some(st.active_breakpoints(breakpoint)) else None |
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} |
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||
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def breakpoint_state(breakpoint: Long): Boolean = |
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state.value.active_breakpoints(breakpoint) |
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def toggle_breakpoint(command: Command, breakpoint: Long) |
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{ |
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state.change(st => |
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{ |
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val (breakpoint_state, st1) = st.toggle_breakpoint(breakpoint) |
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session.protocol_command( |
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"Debugger.breakpoint", |
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Symbol.encode(command.node_name.node), |
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Document_ID(command.id), |
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Value.Long(breakpoint), |
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Value.Boolean(breakpoint_state)) |
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st1 |
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}) |
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} |
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|
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def status(focus: Option[Debugger.Context]): (Debugger.Threads, List[XML.Tree]) = |
61018 | 256 |
{ |
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val st = state.value |
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val output = |
259 |
focus match { |
|
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case None => Nil |
|
261 |
case Some(c) => |
|
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(for { |
|
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(thread_name, results) <- st.output |
61018 | 264 |
if thread_name == c.thread_name |
265 |
(_, tree) <- results.iterator |
|
266 |
} yield tree).toList |
|
267 |
} |
|
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(st.threads, output) |
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} |
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|
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def focus(): List[Debugger.Context] = state.value.focus.toList.map(_._2) |
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def set_focus(c: Debugger.Context) |
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{ |
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state.change(_.set_focus(c)) |
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delay_update.invoke() |
276 |
} |
|
60875 | 277 |
|
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def input(thread_name: String, msg: String*): Unit = |
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session.protocol_command("Debugger.input", (thread_name :: msg.toList):_*) |
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|
60899 | 281 |
def continue(thread_name: String): Unit = input(thread_name, "continue") |
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def step(thread_name: String): Unit = input(thread_name, "step") |
283 |
def step_over(thread_name: String): Unit = input(thread_name, "step_over") |
|
284 |
def step_out(thread_name: String): Unit = input(thread_name, "step_out") |
|
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|
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def clear_output(thread_name: String) |
287 |
{ |
|
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state.change(_.clear_output(thread_name)) |
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delay_update.invoke() |
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} |
291 |
||
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def eval(c: Debugger.Context, SML: Boolean, context: String, expression: String) |
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{ |
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state.change(st => { |
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input(c.thread_name, "eval", c.debug_index.getOrElse(0).toString, |
61010 | 296 |
SML.toString, Symbol.encode(context), Symbol.encode(expression)) |
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st.clear_output(c.thread_name) |
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}) |
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delay_update.invoke() |
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} |
60897 | 301 |
|
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def print_vals(c: Debugger.Context, SML: Boolean, context: String) |
60897 | 303 |
{ |
61014 | 304 |
require(c.debug_index.isDefined) |
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|
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state.change(st => { |
61014 | 307 |
input(c.thread_name, "print_vals", c.debug_index.getOrElse(0).toString, |
61010 | 308 |
SML.toString, Symbol.encode(context)) |
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st.clear_output(c.thread_name) |
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}) |
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delay_update.invoke() |
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} |
60749 | 313 |
} |