| commit | a5a5e2c968eb14335f4e46606d8edfbdbdcea728 | [log] [tgz] |
|---|---|---|
| author | Dan Scales <danscales@google.com> | Mon Jan 25 17:51:03 2021 -0800 |
| committer | Dan Scales <danscales@google.com> | Wed Jan 27 20:44:24 2021 +0000 |
| tree | e86e09dc54db67f390e46c6c2b50871f6c4dcb35 | |
| parent | 8cfa01943a7f43493543efba81996221bb0f27f8 [diff] |
runtime: make sure to remove open-coded defer entries in all cases after a recover We add entries to the defer list at panic/goexit time on-the-fly for frames with open-coded defers. We do this so that we can correctly process open-coded defers and non-open-coded defers in the correct order during panics/goexits. But we need to remove entries for open-coded defers from the defer list when there is a recover, since those entries may never get removed otherwise and will get stale, since their corresponding defers may now be processed normally (inline). This bug here is that we were only removing higher-up stale entries during a recover if all defers in the current frame were done. But we could have more defers in the current frame (as the new test case shows). In this case, we need to leave the current defer entry around for use by deferreturn, but still remove any stale entries further along the chain. For bug 43921, simple change that we should abort the removal loop for any defer entry that is started (i.e. in process by a still not-recovered outer panic), even if it is not an open-coded defer. This change does not fix bug 43920, which looks to be a more complex fix. Fixes #43882 Fixes #43921 Change-Id: Ie05b2fa26973aa26b25c8899a2abc916090ee4f5 Reviewed-on: https://go-review.googlesource.com/c/go/+/286712 Run-TryBot: Dan Scales <danscales@google.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com> Reviewed-by: Keith Randall <khr@golang.org> Trust: Dan Scales <danscales@google.com>
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