> More details?
Ok. So currently we initialize shadow memory via anonymous mmap which
effectively fills it with zeros. If we filled it with eights instead
(by mmapping /dev/byte8), we could simplify Asan check to a single
comparison:
byte *shadow_address = MemToShadow(address);
byte shadow_value = *shadow_address;
byte last_accessed_byte = (address & 7) + kAccessSize - 1;
if (last_accessed_byte >= shadow_value) {
ReportError(address, kAccessSize, kIsWrite);
}
-Y
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