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Handle partially initialized variable

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disinvite 2024-03-04 22:13:32 -05:00
parent 61f5e4c239
commit 1ac901f22e
1 changed files with 14 additions and 0 deletions
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14
tools/datacmp.py
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@ -181,6 +181,20 @@ def do_the_comparison(args: argparse.Namespace) -> Iterable[ComparisonItem]:
orig_raw = origfile.read(var.orig_addr, data_size)
recomp_raw = recompfile.read(var.recomp_addr, data_size)
# If either read exceeded the raw data size for the section,
# assume the entire variable is uninitialized.
# TODO: This is not correct, strictly speaking. However,
# it is probably impossible for a variable to exceed
# the virtual size of the section, so all that is left is
# the uninitialized data.
# If the variable falls at the end of the section like this,
# it is highly likely to be uninitialized.
if orig_raw is not None and len(orig_raw) < data_size:
orig_raw = None
if recomp_raw is not None and len(recomp_raw) < data_size:
recomp_raw = None
# If both variables are uninitialized, we consider them equal.
# Otherwise, this is a diff but there is nothing to compare.
if orig_raw is None or recomp_raw is None: