Handle SIGABRT a little more nicely.

base/misc.cc:
    Don't dump trace in panic(), SIGABRT handler will do it now.
sim/main.cc:
    Add SIGABRT handler that prints curTick and dumps buffered trace (if any).
    This doesn't work as well as I would like since the buffered trace records
    often contain stale references to stack-resident temporary std::string objects.
    Someday we'll have to put in a fix for that.

--HG--
extra : convert_revision : 67576efbf5c10e63e255fc9a9ec520326fd3567b

base/misc.cc

@@ -61,11 +61,6 @@ __panic(const string &format, cp::ArgList &args, const char *func,
 
     delete &args;
 
-#if TRACING_ON
-    // dump trace buffer, if there is one
-    Trace::theLog.dump(cerr);
-#endif
-
     abort();
 }
 

sim/main.cc

@@ -90,6 +90,18 @@ exitNowHandler(int sigtype)
     async_exit = true;
 }
 
+/// Abort signal handler.
+void
+abortHandler(int sigtype)
+{
+    cerr << "Program aborted at cycle " << curTick << endl;
+
+#if TRACING_ON
+    // dump trace buffer, if there is one
+    Trace::theLog.dump(cerr);
+#endif
+}
+
 /// Simulator executable name
 const char *myProgName = "";
 
@@ -232,6 +244,7 @@ main(int argc, char **argv)
     signal(SIGUSR1, dumpStatsHandler);		// dump intermediate stats
     signal(SIGUSR2, dumprstStatsHandler);	// dump and reset stats
     signal(SIGINT, exitNowHandler);		// dump final stats and exit
+    signal(SIGABRT, abortHandler);
 
     sayHello(cerr);