Set EH personality when resuming stack unwinding#36895
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dylanmckay wants to merge 1 commit intorust-lang:masterfrom
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Set EH personality when resuming stack unwinding#36895dylanmckay wants to merge 1 commit intorust-lang:masterfrom
dylanmckay wants to merge 1 commit intorust-lang:masterfrom
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To resume stack unwinding, the LLVM `resume` instruction must be used. In order to use this instruction, the calling function must have an exception handling personality set. LLVM 4.0 adds a new IR validation check to ensure a personality is always set in these cases. This was introduced in [r277360](https://reviews.llvm.org/rL277360).
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| if let Some(cleanup_pad) = cleanup_pad { | ||
| bcx.cleanup_ret(cleanup_pad, None); | ||
| } else { | ||
| let llpersonality = bcx.fcx.eh_personality(); |
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Why is init_cpad not doing enough? You are not supposed to have resume without some sort of cleanups going on.
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I'm looking into that now. The issue that we found in avr-rust#18 was having a resume without a personality inside std::mem::forget, which is basically a nop so I don't think there is any cleanup to do.
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Closing due to inactivity, but feel free to resubmit with comments addressed! |
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To resume stack unwinding, the LLVM
resumeinstruction must be used.In order to use this instruction, the calling function must have an
exception handling personality set.
LLVM 4.0 adds a new IR validation check to ensure a personality is
always set in these cases.
This was introduced in r277360.