Opened 9 years ago
Closed 9 years ago
#1255 closed defect (fixed)
Parallel signal dispatch may corrupt the stack limit
| Reported by: | evhan | Owned by: | |
|---|---|---|---|
| Priority: | major | Milestone: | someday |
| Component: | core libraries | Version: | 4.10.x |
| Keywords: | signals threads | Cc: | Joerg.Wittenberger@… |
| Estimated difficulty: |
Description
As reported by Jörg and discussed in this chicken-hackers thread, when multiple signals are dispatched in parallel it's possible for C_stack_limit to be assigned an invalid value due to a race in C_raise_interrupt.
7216501 addressed the issue to a degree, but not entirely. A proper fix will likely require some synchronization around this section of code.
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I think this has been addressed by 5d2a17 / f2ed421 / 10ef6f6