mirror of https://github.com/wolfSSL/wolfBoot.git
65 lines
2.4 KiB
Python
65 lines
2.4 KiB
Python
#!/usr/bin/env python3
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# unit-delta-sector-align.py
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#
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# Build-time invariant for DELTA_UPDATES: the per-sector fill loop in
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# wolfBoot_delta_update() (src/update_flash.c) calls wb_patch() with
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# DELTA_BLOCK_SIZE chunks until WOLFBOOT_SECTOR_SIZE bytes are produced, so
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# the reconstructed image is only sector-aligned when WOLFBOOT_SECTOR_SIZE is
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# a multiple of DELTA_BLOCK_SIZE. A mismatched config used to compile fine
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# and corrupt the delta apply (write past the one-sector SWAP partition,
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# misaligned resume); the build now rejects it with an #error.
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#
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# This test builds the real update_flash.c (via unit-update-flash.c) with a
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# deliberately misaligned DELTA_BLOCK_SIZE and asserts the build fails with
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# the invariant message.
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#
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# Copyright (C) 2026 wolfSSL Inc.
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#
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# This file is part of wolfBoot.
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#
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# wolfBoot is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# wolfBoot is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
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import os
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import subprocess
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import sys
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MESSAGE = "WOLFBOOT_SECTOR_SIZE % DELTA_BLOCK_SIZE != 0"
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def main():
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# The misalign target is not in $(TESTS) and its rule does not track
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# src/update_flash.c (included via unit-update-flash.c), so drop any
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# stale artifact to force a real rebuild.
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try:
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os.remove("unit-update-flash-delta-misalign")
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except FileNotFoundError:
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pass
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p = subprocess.run(["make", "unit-update-flash-delta-misalign"],
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capture_output=True, text=True)
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if p.returncode == 0:
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print("FAIL: misaligned DELTA_BLOCK_SIZE config built, "
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"expected the sector alignment #error")
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return 1
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if MESSAGE not in (p.stdout + p.stderr):
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print("FAIL: build failed for the wrong reason:\n")
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print(p.stderr[-2000:])
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return 1
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print("PASS: misaligned DELTA_BLOCK_SIZE rejected at build time")
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return 0
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if __name__ == "__main__":
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sys.exit(main())
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