Debugger: Add handling for signal debug messages.

DebugEvents:
- Add definition for SignalReceivedEvent.

DebuggerInterface:
- Generate SignalReceivedEvent upon receipt of
  B_DEBUGGER_MESSAGE_SIGNAL_RECEIVED.

src/apps/debugger/debugger_interface/DebugEvent.cpp

@@ -237,3 +237,15 @@ HandedOverEvent::HandedOverEvent(team_id team, thread_id thread,
 	fCausingThread(causingThread)
 {
 }
+
+
+// #pragma mark - SignalReceivedEvent
+
+
+SignalReceivedEvent::SignalReceivedEvent(team_id team, thread_id thread,
+	const SignalInfo& info)
+	:
+	DebugEvent(B_DEBUGGER_MESSAGE_SIGNAL_RECEIVED, team, thread),
+	fInfo(info)
+{
+}

src/apps/debugger/debugger_interface/DebugEvent.h

@@ -9,6 +9,7 @@
 #include <debugger.h>
 
 #include "ImageInfo.h"
+#include "SignalInfo.h"
 #include "SyscallInfo.h"
 #include "Types.h"
 
@@ -223,4 +224,17 @@ private:
 };
 
 
+class SignalReceivedEvent : public DebugEvent {
+public:
+								SignalReceivedEvent(team_id team,
+									thread_id thread,
+									const SignalInfo& info);
+
+			const SignalInfo&	GetSignalInfo() const	{ return fInfo; }
+
+private:
+			SignalInfo			fInfo;
+};
+
+
 #endif	// DEBUG_EVENT_H

src/apps/debugger/debugger_interface/DebuggerInterface.cpp

@@ -857,13 +857,21 @@ DebuggerInterface::_CreateDebugEvent(int32 messageCode,
 					message.post_syscall.syscall, message.post_syscall.args));
 			break;
 		}
+		case B_DEBUGGER_MESSAGE_SIGNAL_RECEIVED:
+		{
+			event = new(std::nothrow) SignalReceivedEvent(message.origin.team,
+				message.origin.thread,
+				SignalInfo(message.signal_received.signal,
+					message.signal_received.handler,
+					message.signal_received.deadly));
+			break;
+		}
 		default:
 			printf("DebuggerInterface for team %" B_PRId32 ": unknown message "
 				"from kernel: %" B_PRId32 "\n", fTeamID, messageCode);
 			// fall through...
 		case B_DEBUGGER_MESSAGE_TEAM_CREATED:
 		case B_DEBUGGER_MESSAGE_PRE_SYSCALL:
-		case B_DEBUGGER_MESSAGE_SIGNAL_RECEIVED:
 		case B_DEBUGGER_MESSAGE_PROFILER_UPDATE:
 		case B_DEBUGGER_MESSAGE_HANDED_OVER:
 			_ignore = true;