Example #1
0
ReturnOop VMEvent::get_event_request(DebuggerEvent *d_event,
    int &event_count, jbyte &suspend_policy)
{
  VMEventStream es;

  UsingFastOops fast_oops;

  VMEvent::Fast ep, epp;
  VMEventModifier::Fast em;
  bool matched;

  jbyte kind = d_event->event_kind();

  event_count = 0;
  suspend_policy = 0;
  ep = es.next_by_kind(kind);
  while(!ep.is_null()) {
    bool should_delete = false;
    // check modifiers
#if ENABLE_ISOLATES
    // Check to see what task this event was requested on
    if (ep().task_id() != -1 &&
        (Thread::current()->task_id() != ep().task_id())) {
      ep = es.next_by_kind(kind);
      continue;
    }
#endif
    em = ep().mods();
    // we need to check the modifiers to see if we send this event
    matched = true;
    do {
      if (em.is_null()) {
        break;
      }
      if (!em().match(d_event, &should_delete)) {
        matched = false;
        break;
      }
      em = em().next();
    } while(em.not_null());
    if (matched) {
      // Found a matching event, join it to the list of events to send
      ep().set_send_next(&epp);
      epp = ep;
      event_count++;
      if (ep().suspend_policy() > suspend_policy) {
        suspend_policy = ep().suspend_policy();
      }
    }
    if (should_delete) {
      clear_event_request(&ep);
    }
    ep = es.next_by_kind(kind);
  }
  return epp;
}
ReturnOop VMEventModifier::new_modifier(PacketInputStream *in,
                                        PacketOutputStream *out, bool& error) {

  UsingFastOops fast_oops;

  jbyte mod_kind = in->read_byte();
  VMEventModifier::Fast newMod;
  Thread::Fast thread;
  newMod = allocate_modifier();
  if (newMod.is_null()) {
    error = true;
    out->set_error(JDWP_Error_OUT_OF_MEMORY);
    return NULL;
  }
  newMod().set_mod_kind(mod_kind);

#ifdef AZZERT
  if (TraceDebugger) {
    tty->print_cr("Modifier: modkind = %d", mod_kind);
  }
#endif
  switch(mod_kind) {
  case JDWP_EventRequest_Set_Out_modifiers_Modifier_FieldOnly:
    // unsupported
    in->read_class_id();
    in->read_class_id();
    in->read_int();
    return NULL;
  case JDWP_EventRequest_Set_Out_modifiers_Modifier_Conditional:
    // unsupported
    in->read_int();
    return NULL;
  case JDWP_EventRequest_Set_Out_modifiers_Modifier_ClassExclude:
    // unsupported
    in->read_string();
    return NULL;
  case JDWP_EventRequest_Set_Out_modifiers_Modifier_ThreadOnly:
    newMod().set_thread_id(in->read_thread_id());
    return newMod;
  case JDWP_EventRequest_Set_Out_modifiers_Modifier_Count:
    newMod().set_count(in->read_int());
    return newMod;
  case JDWP_EventRequest_Set_Out_modifiers_Modifier_ClassOnly:
    {
      newMod().set_clazz_id(in->read_class_id());
#ifdef AZZERT
      if (TraceDebugger) {
        tty->print_cr("Modifier: class_id = %d", newMod().clazz_id());
      }
#endif
      return newMod;
    }
  case JDWP_EventRequest_Set_Out_modifiers_Modifier_ClassMatch:
    {
      UsingFastOops fast_oops_2;
      int length;
      SETUP_ERROR_CHECKER_ARG;

      TypeArray::Fast ta = in->read_raw_string(length JVM_NO_CHECK);
      if (ta.is_null()) {
        // Out of memory?? Things will fall apart soon enough,
        // We just punt on this modifier
        return newMod;
      }
      for (int i = length - 1; i >= 0; i--) {
        if (ta().byte_at(i) == '.') {
          ta().byte_at_put(i, '/');
        }
      }
      Symbol::Fast tmpName = Universe::new_symbol(&ta,
                             (utf8)(ta().base_address()), length JVM_NO_CHECK);
      if (tmpName.is_null()) {
        error = true;
        out->set_error(JDWP_Error_OUT_OF_MEMORY);
        return NULL;
      }
#ifdef AZZERT
      if (TraceDebugger) {
        tty->print("Modifier: class match = ");
        tmpName().print_symbol_on(tty);
        tty->cr();
      }
#endif
      ClassMatchModifier::Fast class_match_modifier = newMod().obj();
      class_match_modifier().set_class_match_name(&tmpName);
      return newMod;
    }
  case JDWP_EventRequest_Set_Out_modifiers_Modifier_LocationOnly:
    {
      UsingFastOops fast_oops_3;

      jbyte tag = in->read_byte(); (void)tag;
      LocationModifier::Fast lmod = newMod.obj();
      lmod().set_clazz_id(in->read_class_id());
      if (lmod().clazz_id() == 0) {
        return NULL;        /* Class ID == 0 is invalid */
      }
      lmod().set_method_id(in->read_method_id());
      lmod().set_offset(in->read_long());
#ifdef AZZERT
      if (TraceDebugger) {
        tty->print_cr("Loc: class: 0x%x, method: 0x%x, off: 0x%x",
                      lmod().clazz_id(),
                      (int)(lmod().method_id() & 0xFFFFFFFF),
                      lmod().offset());
      }
#endif
      return lmod;
    }
  case JDWP_EventRequest_Set_Out_modifiers_Modifier_ExceptionOnly:
    {
      UsingFastOops fast_oops_4;

      ExceptionModifier::Fast emod = newMod.obj();
      emod().set_clazz_id(in->read_class_id());
      emod().set_sig_caught(in->read_boolean());
      emod().set_sig_uncaught(in->read_boolean());
      return emod;
    }
  case JDWP_EventRequest_Set_Out_modifiers_Modifier_Step:
    {
      UsingFastOops fast_oops_5;

      int thread_id = in->read_thread_id();
      thread = JavaDebugger::get_thread_by_id(thread_id);
      if (!JavaDebugger::is_valid_thread(&thread) ||
          !thread().last_java_frame_exists()) {
        error = true;
        out->set_error(JDWP_Error_INVALID_THREAD);
        return NULL;
      }

      Frame fr(&thread);
      GUARANTEE(fr.is_java_frame(), "Single step must start at JavaFrame");
      JavaFrame jf = fr.as_JavaFrame();
      LocationModifier::Fast loc = LocationModifier::new_location(&jf);
      if (loc.is_null()) {
        error = true;
        out->set_error(JDWP_Error_OUT_OF_MEMORY);
        return NULL;
      }
#ifdef AZZERT
      if (TraceDebugger) {
        tty->print_cr("StepLoc: thread: 0x%x, class: 0x%x, method: 0x%x, off: 0x%x",
                      thread_id, loc().clazz_id(),
                      (int)(loc().method_id() & 0xFFFFFFFF),
                      loc().offset());
      }
#endif
      loc().set_mod_kind(mod_kind);
      StepModifier::Fast smod = loc.obj();
      smod().set_thread_id(thread_id);
      if (thread.is_null() /* || (thread.state() & THREAD_DEAD) */) {
        /*
         * If you try to single step after suspending because
         * of an uncaught exception event we'll get sent the
         * thread id of the thread that had the exception.
         * That thread is dead though.
         */
        error = true;
        out->set_error(JDWP_Error_INVALID_THREAD);
        return NULL;
      }
      
      smod().set_step_size(in->read_int());
      smod().set_step_depth(in->read_int());
    
      /* query the _proxy_ for next line location */                        
      {
        UsingFastOops fast_oops_6;

        DebuggerEvent d_event;
        d_event.set_event_kind((jbyte)VM_STEPINFO_EVENT);
        VMEvent::stepping_info_request(&d_event, in->transport(),
                                                 &smod);

        /*
         * At this point, the proxy has made sure no more commands
         * from the debugger get sent until we get our line number
         * info from the proxy
         */
        JavaDebugger::set_loop_count(1);
        JavaDebugger::process_command_loop();
        /*
         * Once we get back here, then we know we've gotten the
         * command from the proxy with the line number info put into
         * the StepModifier object in the step_info_event above.
         */

        /* setup the relevant info */
        thread().set_is_stepping(true);
        // set the _debugger_active flag for the interpreter loop
        JavaDebugger::set_stepping(true);

        //        smod = step_info_event().mods();
        //        smod().set_step_target_offset(stepData().step_target_offset());
        smod().unlink_method();

        if (smod().step_depth() == JDWP_StepDepth_OUT) {
          // if stepping out to the caller, we really should unlink any
          // compiled code from here to the caller frame, for now assume
          // one frame up.  It could be re-compiled but we may luck out.
          Method::Fast m;
          Frame caller(jf);
          jf.caller_is(caller);
          if (!caller.is_entry_frame()) {
            m = caller.as_JavaFrame().method();
#if ENABLE_COMPILER
            if (m().has_compiled_code()) {
              m().unlink_compiled_code();
            }
#endif
          }
        }
        smod().set_step_starting_fp(DISTANCE(thread().stack_base(), jf.fp()));
        smod().set_step_starting_offset(jf.bci());
        //        smod().set_dup_current_line_offset(stepData().dup_current_line_offset());
        //        smod().set_post_dup_line_offset(stepData().post_dup_line_offset());
        thread().set_step_info(&smod);
      }
      return smod;
    }
  }
  error = true;
  out->set_error(JDWP_Error_NOT_IMPLEMENTED);
  return NULL;
}