[SR-9863] Libdispatch's semaphores mishandle exits due to signals #623
Description
| Previous ID | SR-9863 |
| Radar | rdar://problem/47791327 |
| Original Reporter | gmilos (JIRA User) |
| Type | Bug |
Attachment: Download
Additional Detail from JIRA
| Votes | 0 |
| Component/s | libdispatch |
| Labels | Bug |
| Assignee | ktopley-apple (JIRA) |
| Priority | Medium |
md5: e78b5ae6fce74b3d638d2adebfa603b3
Issue Description:
The attached reproduction shows how libdispatch semaphore crashes if the process is configured to receive a signal (non-default).
This is due to unguarded sem_wait:
https://github.com/apple/swift-corelibs-libdispatch/blob/dde58922492859d3664ee0bc296a26dee80ee369/src/shims/lock.c#L206