Block all signals in the parent before fork - #51
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Block all signals on the spawning thread before fork, so that the child process setup (descriptor wiring, close-on-exec sweep, chdir) cannot be interrupted by signals (so no call can fail with EINTR). This is hardening: previously, the child's setup was safe only as long as neither the VM nor native code loaded into the process installed disruptive signal handlers. Blocking makes the setup safe by construction.
phvega
approved these changes
Aug 4, 2026
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Block all signals on the spawning thread before fork, so that the child process setup (descriptor wiring, close-on-exec sweep, chdir) cannot be interrupted by signals (so no call can fail with EINTR).
This is hardening: previously, the child's setup was safe only as long as neither the VM nor native code loaded into the process installed disruptive signal handlers. Blocking makes the setup safe by construction.