Accessing the mapped region of memory after an mmap call with a non-zero offset results in a seg fault. A zero offset will not result in a seg fault.
Cygwin1.dll version 1.3.19 doesn't experience this problem.
Cygcheck output is attached.
Example:
if (rslt = mmap(0, size, prot, MAP_SHARED, fd, offset))
== MAP_FAILED) {
} else {
printf("%d", rslt[0]); // seg fault
}
AND
if (rslt = mmap(0, size, prot, MAP_SHARED, fd, 0))
== MAP_FAILED) {
} else {
printf("%d", rslt[0]); // no seg fault (zero offset)
}
cygcheck.out
Description: Binary data
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