[LibOS] Fix bug of RLIMIT_STACK
being overwritten in child
#1976
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Description of the changes
Previously, the resource limit
RLIMIT_STACK
(maximum size of the process stack, in bytes) was overwritten in the child process, after fork. Thus, if the parent usedsetrlimit(RLIMIT_STACK)
, the effect of this was lost in the child. This PR fixes this bug, and adds a LibOS test to verify the correct behavior.Fixes #1974
Noticed while reviewing #1973.
How to test this PR?
New LibOS test was added.
This change is