[debugger] Fix debugging after hot reloading (#55599)

* Fix deug after hotreload.

* do not change mono.proj

* fix formatting.

* Remove extra space.

Author: thaystg

src/mono/mono/metadata/mono-debug.c

@@ -1120,8 +1120,12 @@ mono_debug_get_seq_points (MonoDebugMethodInfo *minfo, char **source_file, GPtrA
 	if (img->has_updates) {
 		int idx = mono_metadata_token_index (minfo->method->token);
 		gpointer ptr = mono_metadata_update_get_updated_method_ppdb (img, idx);
-		mono_ppdb_get_seq_points_enc (ptr, seq_points,  n_seq_points);
-	} else if (minfo->handle->ppdb)
+		if (ptr != NULL) {
+			mono_ppdb_get_seq_points_enc (ptr, seq_points, n_seq_points);
+			return;
+		}
+	} 
+	if (minfo->handle->ppdb)
 		mono_ppdb_get_seq_points (minfo, source_file, source_file_list, source_files, seq_points, n_seq_points);
 	else
 		mono_debug_symfile_get_seq_points (minfo, source_file, source_file_list, source_files, seq_points, n_seq_points);

src/mono/mono/mini/interp/transform.c

@@ -9757,7 +9757,10 @@ mono_interp_transform_method (InterpMethod *imethod, ThreadContext *context, Mon
 
 	MonoJitMemoryManager *jit_mm = get_default_jit_mm ();
 	jit_mm_lock (jit_mm);
-	g_hash_table_replace (jit_mm->seq_points, imethod->method, imethod->jinfo->seq_points);
+	gpointer seq_points = g_hash_table_lookup (jit_mm->seq_points, imethod->method);
+	if (!seq_points || seq_points != imethod->jinfo->seq_points)
+		g_hash_table_replace (jit_mm->seq_points, imethod->method, imethod->jinfo->seq_points);
+
 	jit_mm_unlock (jit_mm);
 
 	// FIXME: Add a different callback ?