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1# Copyright 2026 Huawei Technologies Co., Ltd 

2# 

3# Licensed under the Apache License, Version 2.0 (the "License"); 

4# you may not use this file except in compliance with the License. 

5# You may obtain a copy of the License at 

6# 

7# http://www.apache.org/licenses/LICENSE-2.0 

8# 

9# Unless required by applicable law or agreed to in writing, software 

10# distributed under the License is distributed on an "AS IS" BASIS, 

11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 

12# See the License for the specific language governing permissions and 

13# limitations under the License. 

14# ============================================================================ 

15"""Dump-specific safe stage directories, independent of profiler names.""" 

16 

17from collections.abc import Sequence 

18import re 

19 

20from hyper_multicore.diagnostics.common.graph import operator_diagnostic_name 

21from hyper_multicore.scheduler.graph import OperatorNode 

22 

23 

24_SAFE_FILE_NAME = re.compile(r"[^A-Za-z0-9_.-]+") 

25 

26 

27def _stage_names(operators: Sequence[OperatorNode]) -> dict[str, str]: 

28 """Reject duplicate, colliding or reserved dump stage directories.""" 

29 names = {} 

30 used_directories = set() 

31 for operator in operators: 

32 name = operator_diagnostic_name(operator) 

33 directory = _SAFE_FILE_NAME.sub("_", name) 

34 if directory in ("", ".", "..", "__kernel_boundary__") or directory in used_directories: 

35 raise ValueError(f"duplicate, colliding or reserved MegaKernel dump stage directory: {name!r}") 

36 used_directories.add(directory) 

37 names[operator.name] = name 

38 return names