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Austin Group issue 62 [1] dropped the async-signal-safe requirement for fork and provided a async-signal-safe _Fork replacement that does not run the atfork handlers. It will be included in the next POSIX standard. It allow to close a long standing issue to make fork AS-safe (BZ#4737). As indicated on the bug, besides the internal lock for the atfork handlers itself; there is no guarantee that the handlers itself will not introduce more AS-safe issues. The idea is synchronize fork with the required internal locks to allow children in multithread processes to use mostly of standard function (even though POSIX states only AS-safe function should be used). On signal handles, _Fork should be used intead and only AS-safe functions should be used. For testing, the new tst-_Fork only check basic usage. I also added a new tst-mallocfork3 which uses the same strategy to check for deadlock of tst-mallocfork2 but using threads instead of subprocesses (and it does deadlock if it replaces _Fork with fork). [1] https://austingroupbugs.net/view.php?id=62 |
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| .. | ||
| bits | ||
| coldfire | ||
| m680x0 | ||
| sys | ||
| ____longjmp_chk.c | ||
| arch-syscall.h | ||
| c++-types.data | ||
| clone.S | ||
| configure | ||
| configure.ac | ||
| dl-librecon.h | ||
| getpagesize.c | ||
| Implies | ||
| kernel_sigaction.h | ||
| kernel_stat.h | ||
| kernel-features.h | ||
| ldconfig.h | ||
| m68k-helpers.c | ||
| Makefile | ||
| mmap_internal.h | ||
| mremap.S | ||
| register-dump.h | ||
| sigcontextinfo.h | ||
| syscall.S | ||
| syscalls.list | ||
| sysdep.h | ||
| sysdep.S | ||
| time64-compat.h | ||
| Versions | ||
| vfork.S | ||
| xstatver.h | ||