| Commit message (Collapse) | Author | Age | Files | Lines |
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UI.Exit can be accessed from goroutines drawing, goroutines executing
commands and goroutines waiting for events.
Write at 0x00c0002b2040 by main goroutine:
main.main.func1()
/home/simon/src/aerc2/aerc.go:76 +0x33d
git.sr.ht/~sircmpwn/aerc2/widgets.(*Aerc).BeginExCommand.func1()
/home/simon/src/aerc2/widgets/aerc.go:245 +0x89
git.sr.ht/~sircmpwn/aerc2/widgets.(*ExLine).Event()
/home/simon/src/aerc2/widgets/exline.go:131 +0x442
git.sr.ht/~sircmpwn/aerc2/widgets.(*Aerc).Event()
/home/simon/src/aerc2/widgets/aerc.go:116 +0x83c
git.sr.ht/~sircmpwn/aerc2/widgets.(*Aerc).simulate()
/home/simon/src/aerc2/widgets/aerc.go:109 +0x12a
git.sr.ht/~sircmpwn/aerc2/widgets.(*Aerc).Event()
/home/simon/src/aerc2/widgets/aerc.go:142 +0x722
git.sr.ht/~sircmpwn/aerc2/lib/ui.(*UI).Tick()
/home/simon/src/aerc2/lib/ui/ui.go:75 +0x33f
main.main()
/home/simon/src/aerc2/aerc.go:94 +0x497
Previous read at 0x00c0002b2040 by goroutine 19:
git.sr.ht/~sircmpwn/aerc2/lib/ui.Initialize.func1()
/home/simon/src/aerc2/lib/ui/ui.go:45 +0x97
Goroutine 19 (running) created at:
git.sr.ht/~sircmpwn/aerc2/lib/ui.Initialize()
/home/simon/src/aerc2/lib/ui/ui.go:44 +0x372
main.main()
/home/simon/src/aerc2/aerc.go:87 +0x3a9
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This was is more complicated than others. The cells list is accessed by
multiple goroutines:
- Some change the Grid's contents via AddChild/RemoveChild
- Some call Draw
- Some invalidate the grid via Invalidate
Invalidate calls are tricky to handle because they will also invalidate all
child cells. This will inturn trigger the cellInvalidated callback, which needs
to read the list of cells.
For this reason, we use a sync.RWLock which allows multiple concurrent reads.
Below is the race fixed by this commit.
Read at 0x00c0000bc3d0 by goroutine 7:
git.sr.ht/~sircmpwn/aerc2/lib/ui.(*Grid).cellInvalidated()
/home/simon/src/aerc2/lib/ui/grid.go:181 +0x45
git.sr.ht/~sircmpwn/aerc2/lib/ui.(*Grid).cellInvalidated-fm()
/home/simon/src/aerc2/lib/ui/grid.go:179 +0x55
git.sr.ht/~sircmpwn/aerc2/lib/ui.(*Invalidatable).DoInvalidate()
/home/simon/src/aerc2/lib/ui/invalidatable.go:22 +0x85
git.sr.ht/~sircmpwn/aerc2/lib/ui.(*Bordered).contentInvalidated-fm()
/home/simon/src/aerc2/lib/ui/borders.go:39 +0x56
git.sr.ht/~sircmpwn/aerc2/lib/ui.(*Invalidatable).DoInvalidate()
/home/simon/src/aerc2/lib/ui/invalidatable.go:22 +0x85
git.sr.ht/~sircmpwn/aerc2/widgets.NewDirectoryList.func1()
/home/simon/src/aerc2/widgets/dirlist.go:81 +0x55
git.sr.ht/~sircmpwn/aerc2/lib/ui.(*Invalidatable).DoInvalidate()
/home/simon/src/aerc2/lib/ui/invalidatable.go:22 +0x85
git.sr.ht/~sircmpwn/aerc2/widgets.(*Spinner).Start.func1()
/home/simon/src/aerc2/widgets/spinner.go:88 +0x82
Previous write at 0x00c0000bc3d0 by main goroutine:
[failed to restore the stack]
Goroutine 7 (running) created at:
git.sr.ht/~sircmpwn/aerc2/widgets.(*Spinner).Start()
/home/simon/src/aerc2/widgets/spinner.go:46 +0x98
git.sr.ht/~sircmpwn/aerc2/widgets.NewDirectoryList()
/home/simon/src/aerc2/widgets/dirlist.go:37 +0x28b
git.sr.ht/~sircmpwn/aerc2/widgets.NewAccountView()
/home/simon/src/aerc2/widgets/account.go:49 +0x5ca
git.sr.ht/~sircmpwn/aerc2/widgets.NewAerc()
/home/simon/src/aerc2/widgets/aerc.go:60 +0x807
main.main()
/home/simon/src/aerc2/aerc.go:65 +0x33e
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MessageStore has a lot of exported fields that can be read from the outside.
Each read must be protected, because a call from Update could happen at any
time.
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This field could be written to in the middle of a Draw call, which reads it
multiple times. Use an atomic variable instead.
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Unfortunately, the IMAP protocol hasn't been designed to be used from multiple
goroutines at the same time. For instance, if you fetch twice the same message
from two different goroutines, it's not possible to tell whether the response
is for one receiver or the other. For this reason, go-imap clients aren't safe
to use from multiple goroutines.
This commit changes the IMAP workers to be synchronous again (a command is
executed only after the previous one has completed). To use IMAP from different
threads, popular clients (e.g. Thunderbird) typically open multiple
connections.
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This release contains race conditions fixes.
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This is read/written from different goroutines.
Write at 0x00c00009c6f0 by goroutine 7:
git.sr.ht/~sircmpwn/aerc2/lib/ui.(*Grid).cellInvalidated()
/home/simon/src/aerc2/lib/ui/grid.go:189 +0x122
git.sr.ht/~sircmpwn/aerc2/lib/ui.(*Grid).cellInvalidated-fm()
/home/simon/src/aerc2/lib/ui/grid.go:178 +0x55
git.sr.ht/~sircmpwn/aerc2/lib/ui.(*Invalidatable).DoInvalidate()
/home/simon/src/aerc2/lib/ui/invalidatable.go:22 +0x85
git.sr.ht/~sircmpwn/aerc2/lib/ui.(*Bordered).contentInvalidated-fm()
/home/simon/src/aerc2/lib/ui/borders.go:39 +0x56
git.sr.ht/~sircmpwn/aerc2/lib/ui.(*Invalidatable).DoInvalidate()
/home/simon/src/aerc2/lib/ui/invalidatable.go:22 +0x85
git.sr.ht/~sircmpwn/aerc2/widgets.NewDirectoryList.func1()
/home/simon/src/aerc2/widgets/dirlist.go:81 +0x55
git.sr.ht/~sircmpwn/aerc2/lib/ui.(*Invalidatable).DoInvalidate()
/home/simon/src/aerc2/lib/ui/invalidatable.go:22 +0x85
git.sr.ht/~sircmpwn/aerc2/widgets.(*Spinner).Start.func1()
/home/simon/src/aerc2/widgets/spinner.go:88 +0x82
Previous write at 0x00c00009c6f0 by main goroutine:
[failed to restore the stack]
Goroutine 7 (running) created at:
git.sr.ht/~sircmpwn/aerc2/widgets.(*Spinner).Start()
/home/simon/src/aerc2/widgets/spinner.go:46 +0x98
git.sr.ht/~sircmpwn/aerc2/widgets.NewDirectoryList()
/home/simon/src/aerc2/widgets/dirlist.go:37 +0x28b
git.sr.ht/~sircmpwn/aerc2/widgets.NewAccountView()
/home/simon/src/aerc2/widgets/account.go:49 +0x5ca
git.sr.ht/~sircmpwn/aerc2/widgets.NewAerc()
/home/simon/src/aerc2/widgets/aerc.go:60 +0x807
main.main()
/home/simon/src/aerc2/aerc.go:65 +0x33e
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Many Drawable implementations have their own Invalidate and OnInvalidate
functions, with an unexported onInvalidate field. However OnInvalidate and
Invalidate are usually not called in the same goroutine. This results in a race
on this field, e.g.:
Read at 0x00c000094748 by goroutine 7:
git.sr.ht/~sircmpwn/aerc2/widgets.NewDirectoryList.func1()
/home/simon/src/aerc2/widgets/dirlist.go:85 +0x56
git.sr.ht/~sircmpwn/aerc2/widgets.(*Spinner).Start.func1()
/home/simon/src/aerc2/widgets/spinner.go:93 +0x1bb
Previous write at 0x00c000094748 by main goroutine:
[failed to restore the stack]
Goroutine 7 (running) created at:
git.sr.ht/~sircmpwn/aerc2/widgets.(*Spinner).Start()
/home/simon/src/aerc2/widgets/spinner.go:46 +0x8f
git.sr.ht/~sircmpwn/aerc2/widgets.NewDirectoryList()
/home/simon/src/aerc2/widgets/dirlist.go:37 +0x286
git.sr.ht/~sircmpwn/aerc2/widgets.NewAccountView()
/home/simon/src/aerc2/widgets/account.go:50 +0x5ca
git.sr.ht/~sircmpwn/aerc2/widgets.NewAerc()
/home/simon/src/aerc2/widgets/aerc.go:60 +0x800
main.main()
/home/simon/src/aerc2/aerc.go:65 +0x33e
To fix this, introduce a new type, Invalidatable, which protects the field.
Unfortunately the Drawable must be passed to the callback function in
Invalidate, so we still need to re-implement this in each Invalidatable user.
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Worker.Process* functions were called in different goroutines than
Worker.Post*. Protect the map with a mutex. Also make the map unexported to
prevent external unprotected accesses.
Worker.Process* functions used to delete items from the map. However they
didn't delete the element they retrieved: callbacks[msg.InResponseTo()] was
read while callbacks[msg] was deleted. I'm not sure I understand why. I tried
to delete the element that was accessed - but this broke everything (UI froze
at "Connecting..."). I don't believe any elements were actually removed from
the map, so the new code just doesn't remove anything.
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It's accessed by the goroutine which increments it and the goroutine that draws
the widget at the same time. Use atomic instead.
Write at 0x00c00000ebc0 by goroutine 7:
git.sr.ht/~sircmpwn/aerc2/widgets.(*Spinner).Start.func1()
/home/simon/src/aerc2/widgets/spinner.go:50 +0x169
Previous read at 0x00c00000ebc0 by main goroutine:
[failed to restore the stack]
Goroutine 7 (running) created at:
git.sr.ht/~sircmpwn/aerc2/widgets.(*Spinner).Start()
/home/simon/src/aerc2/widgets/spinner.go:44 +0x8b
git.sr.ht/~sircmpwn/aerc2/widgets.NewDirectoryList()
/home/simon/src/aerc2/widgets/dirlist.go:37 +0x286
git.sr.ht/~sircmpwn/aerc2/widgets.NewAccountView()
/home/simon/src/aerc2/widgets/account.go:50 +0x5ca
git.sr.ht/~sircmpwn/aerc2/widgets.NewAerc()
/home/simon/src/aerc2/widgets/aerc.go:60 +0x800
main.main()
/home/simon/src/aerc2/aerc.go:65 +0x33e
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Signed-off-by: Elias Naur <mail@eliasnaur.com>
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Signed-off-by: Tom Lebreux <tomlebreux@cock.li>
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This also fixes segfault on :view-message on empty directory
Signed-off-by: Tom Lebreux <tomlebreux@cock.li>
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Signed-off-by: Tom Lebreux <tomlebreux@cock.li>
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When changing to an empty directory, ml.selected is 0, and the length
of ml.store.Uids is 0. The loop condition is always true so we have
an infinite loop causing 100% CPU usage and prevents us to change to
other directories.
Signed-off-by: Tom Lebreux <tomlebreux@cock.li>
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This'll probably look different when we implement it
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Which are not planned for eventual implementation
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These were moved to binds.conf
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Still not great but at least it tells you when something went wrong
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