[8/9] analyzer: handle strlen(BITS_WITHIN) [PR105899]
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gcc/analyzer/ChangeLog:
PR analyzer/105899
* region-model.cc (fragment::has_null_terminator): Handle
SK_BITS_WITHIN.
---
gcc/analyzer/region-model.cc | 21 ++++++++++++++++++++-
1 file changed, 20 insertions(+), 1 deletion(-)
@@ -3357,10 +3357,29 @@ struct fragment
}
break;
+ case SK_BITS_WITHIN:
+ {
+ const bits_within_svalue *bits_within_sval
+ = (const bits_within_svalue *)m_sval;
+ byte_range bytes (0, 0);
+ if (bits_within_sval->get_bits ().as_byte_range (&bytes))
+ {
+ const svalue *inner_sval = bits_within_sval->get_inner_svalue ();
+ fragment f (byte_range
+ (start_read_offset - bytes.get_start_bit_offset (),
+ std::max<byte_size_t> (bytes.m_size_in_bytes,
+ available_bytes)),
+ inner_sval);
+ return f.has_null_terminator (start_read_offset, out_bytes_read);
+ }
+ }
+ break;
+
default:
// TODO: it may be possible to handle other cases here.
- return tristate::TS_UNKNOWN;
+ break;
}
+ return tristate::TS_UNKNOWN;
}
static tristate