Improve setting line number when switching frames

Author: rocky

test/example/fib-exec.py

@@ -3,6 +3,14 @@ def fib(x: int) -> int:
         return 1
     return fib(x-1) + fib(x-2)
 
-command = "print(fib(2))"
-exec(command)
+exec_command = "print(fib(2))"
+
+# Show that trepan3k can figure out what is getting called when exec is used:
+exec(exec_command)
+
+# Show that trepan3k can figure out what is getting called when eval is used:
+eval_command = "fib(0)"
+print(eval(eval_command))
+
+
 print("fib(2)= %d, fib(3) = %d, fib(4) = %d\n" % (fib(2), fib(3), fib(4)))

trepan/processor/command/frame.py

@@ -102,6 +102,9 @@ def find_and_set_debugged_frame(self, frame, thread_id):
         self.stack, self.curindex = get_stack(frame, None, self.proc)
         self.proc.stack, self.proc.curindex = self.stack, self.curindex
         self.proc.frame_thread_name = thread_name
+        self.proc.curframe = frame
+        self.proc.list_lineno = self.curframe.f_lineno - 1
+        self.proc.list_offset = self.curframe.f_lasti
         return
 
     def one_arg_run(self, position_str):

trepan/processor/frame.py

@@ -78,7 +78,7 @@ def adjust_frame(proc_obj, pos: int, is_absolute_pos: bool):
     proc_obj.curindex = pos
     proc_obj.curframe = proc_obj.stack[proc_obj.curindex][0]
     proc_obj.location()
-    proc_obj.list_lineno = None
+    proc_obj.list_lineno = proc_obj.curframe.f_lineno - 1
     proc_obj.list_offset = proc_obj.curframe.f_lasti
     proc_obj.list_object = proc_obj.curframe
     proc_obj.list_filename = proc_obj.curframe.f_code.co_filename