add initial aftermath control

model/aftermath/__init__.py

+import gdb
+
+import logging; log = logging.getLogger(__name__)
+log_user = logging.getLogger("mcgdb.log.user")
+
+import mcgdb
+from mcgdb.toolbox import my_gdb
+
+def initialize():
+    
+    am_command()
+    am_dump_trace_command()
+    
+class am_dump_trace_command (gdb.Command):
+    def __init__ (self):
+        gdb.Command.__init__(self, "aftermath dump_trace", gdb.COMMAND_OBSCURE)
+        
+    def invoke (self, arg, from_tty):
+        if not arg:
+            arg = "trace.ost"
+            
+        with my_gdb.set_parameter("detach-on-fork", "off"):
+            with my_gdb.set_parameter("scheduler-locking", "on"):
+                with my_gdb.active_thread(my_gdb.main_thread()):
+                    log_user.info("Forking to a new process ...")
+                    #gdb.execute("p clone(main, malloc(512)-512, 17)") # 17 = SIGCHLD
+                    gdb.execute("p fork()") 
+                    
+                    tmp_inf = gdb.inferiors()[-1]
+                    my_gdb.switch_to_inferior(tmp_inf)
+                    gdb.execute("finish")
+
+                    log_user.info("Dumping OpenMP trace to {} ...".format(arg))
+                
+                    gdb.execute('call am_trace_dump(&kmpt_trace, "{}")'.format(arg))
+                
+                    gdb.execute("kill")
+                my_gdb.remove_inferior(tmp_inf)
+        
+        log_user.info("Done.")
+
+class am_command (gdb.Command):
+    def __init__ (self):
+        gdb.Command.__init__(self, "aftermath", gdb.COMMAND_OBSCURE, prefix=True)