Improvements to step into target. Work in progress: #576

Description:
- Changes the structure to create a stack from the bytecode information
  so that function call names are correctly computed (this is still a work
  in progress as not all bytecode instructions are currently supported).
- Support to step into function calls inside comprehensions/generators.
- Updates the bytecode dependency to 0.12.0.
  Note: changes were done to the bytecode library to keep the bytecode offset.

cgmanifest.json

@@ -44,8 +44,8 @@
         "Type": "git",
         "git": {
           "Name": "bytecode",
-          "RepositoryUrl": "https://github.com/vstinner/bytecode",
-          "CommitHash": "e3e77fb690ed05ac171e15694e1c5d0e0dc34e86"
+          "RepositoryUrl": "https://github.com/MatthieuDartiailh/bytecode",
+          "CommitHash": "826344ec533643fad068754e0b9799bfeac46634"
         },
         "DevelopmentDependency": false
       }

src/debugpy/_vendored/pydevd/_pydevd_bundle/pydevd_additional_thread_info_regular.py

@@ -46,11 +46,13 @@ class PyDBAdditionalThreadInfo(object):
 
         # Used for CMD_SMART_STEP_INTO (to know which smart step into variant to use)
         'pydev_smart_parent_offset',
+        'pydev_smart_child_offset',
 
         # Used for CMD_SMART_STEP_INTO (list[_pydevd_bundle.pydevd_bytecode_utils.Variant])
         # Filled when the cmd_get_smart_step_into_variants is requested (so, this is a copy
-        # of the last request for a given thread and pydev_smart_parent_offset relies on it).
+        # of the last request for a given thread and pydev_smart_parent_offset/pydev_smart_child_offset relies on it).
         'pydev_smart_step_into_variants',
+        'target_id_to_smart_step_into_variant',
     ]
     # ENDIF
 
@@ -84,7 +86,9 @@ def __init__(self):
         self.thread_tracer = None
         self.step_in_initial_location = None
         self.pydev_smart_parent_offset = -1
+        self.pydev_smart_child_offset = -1
         self.pydev_smart_step_into_variants = ()
+        self.target_id_to_smart_step_into_variant = {}
 
     def get_topmost_frame(self, thread):
         '''

src/debugpy/_vendored/pydevd/_pydevd_bundle/pydevd_api.py

@@ -228,11 +228,11 @@ def request_step(self, py_db, thread_id, step_cmd_id):
         elif thread_id.startswith('__frame__:'):
             sys.stderr.write("Can't make tasklet step command: %s\n" % (thread_id,))
 
-    def request_smart_step_into(self, py_db, seq, thread_id, offset):
+    def request_smart_step_into(self, py_db, seq, thread_id, offset, child_offset):
         t = pydevd_find_thread_by_id(thread_id)
         if t:
             py_db.post_method_as_internal_command(
-                thread_id, internal_smart_step_into, thread_id, offset, set_additional_thread_info=set_additional_thread_info)
+                thread_id, internal_smart_step_into, thread_id, offset, child_offset, set_additional_thread_info=set_additional_thread_info)
         elif thread_id.startswith('__frame__:'):
             sys.stderr.write("Can't set next statement in tasklet: %s\n" % (thread_id,))