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Commit 1bac87e80414 ("terminal: fix race when closing a terminal") fixed
a race in Terminal.Draw by using a mutex. The current locking of the
entire Draw function could create a deadlock, however, since this
function itself might call Terminal.Close which is protected by the same
mutex. A finer-grained locking solves both the race and deadlock
problem.
Signed-off-by: Koni Marti <koni.marti@gmail.com>
Acked-by: Robin Jarry <robin@jarry.cc>
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I applied the wrong version of this patch.
Link: https://lists.sr.ht/~rjarry/aerc-devel/patches/32482
Signed-off-by: Robin Jarry <robin@jarry.cc>
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Fix race when closing a terminal. The race appears as a nil pointer
dereference panic in pty.StartWithAttrs when trying to access the
provided term.cmd variable.
Before calling pty.StartwithAttrs in the Terminal.Draw function,
term.cmd is checked for nil. Terminal.Close must be called concurrently
right after this check and before/while entering pty.StartWithAttrs.
This can be avoided with a mutex.
Link: https://github.com/creack/pty/issues/146
Link: https://lists.sr.ht/~rjarry/aerc-devel/%3CCJ2I45HMOTGD.2J1QMEJ4T1E3N%40t450.arielp.com%3E#%3CCJ3D069RCTXL.3VEZ7JIGFHOHK@Archetype%3E
Fixes: https://todo.sr.ht/~rjarry/aerc/38
Signed-off-by: Koni Marti <koni.marti@gmail.com>
Acked-by: Robin Jarry <robin@jarry.cc>
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Since panics still regularly "destroy" the terminal, it is hard to get a
stack trace for panics you do not anticipate. This commit adds a panic
handler that automatically creates a logfile inside the current working
directory.
It has to be added to every goroutine that is started and will repair
the terminal on a panic.
Signed-off-by: Moritz Poldrack <git@moritz.sh>
Acked-by: Robin Jarry <robin@jarry.cc>
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Signed-off-by: Moritz Poldrack <git@moritz.sh>
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pty.Getsize() is used in the Draw function of the terminal widget and wraps the
pty.GetsizeFull() function. However, pty.Getsize does not check the returned
error from pty.GetsizeFull before dereferencing the winsize struct. In case of
an error, this will cause a nil pointer deference and panic.
This has been reported in the upstream package, but in the meantime, we can
directly use pty.GetsizeFull.
References: https://todo.sr.ht/~rjarry/aerc/11
Signed-off-by: Koni Marti <koni.marti@gmail.com>
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fixes the segmentation fault when copy-pasting a large text into the
composer editor. The problem is a concurrent read of the vterm field in the
Terminal widget in its flushTerminal() method which can be avoided with a mutex.
Fixes: https://todo.sr.ht/~rjarry/aerc/12
Signed-off-by: Koni Marti <koni.marti@gmail.com>
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I'm not sure what are the implications but it seems required.
Link: https://github.com/golang/go/issues/20883
Signed-off-by: Robin Jarry <robin@jarry.cc>
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This fixes a substantial performance issue when scrolling emails with
long/complicated contents, where scrolling down a single line can take
something like hundreds of ms before the screen is updated to reflect
the scroll. It's really bad if the email has lots of columns, e.g. like
if it's an html email that was passed through a filter (w3m, etc) to
render it.
Using pprof, I found that the multiple calls to vterm.ScreenCell.Attrs()
in styleFromCell were really really expensive. This patch replaces them
with a single call.
Here's a before and after with a simple, but very manual test of opening
a large email with contents that went through a w3m filter and
continuously scrolling up and down over and over for ~30 seconds:
*** Before:
----------------------------------------------------------+-------------
flat flat% sum% cum cum% calls calls% + context
----------------------------------------------------------+-------------
28.25s 100% | git.x2esr.x2eht..z2f..z7esircmpwn..z2faerc..z2fwidgets.PartSwitcher.Draw
0 0% 99.94% 28.25s 82.31% | git.x2esr.x2eht..z2f..z7esircmpwn..z2faerc..z2fwidgets.PartViewer.Draw
28.25s 100% | git.x2esr.x2eht..z2f..z7esircmpwn..z2faerc..z2fwidgets.Terminal.Draw
----------------------------------------------------------+-------------
28.25s 100% | git.x2esr.x2eht..z2f..z7esircmpwn..z2faerc..z2fwidgets.PartViewer.Draw
0 0% 99.94% 28.25s 82.31% | git.x2esr.x2eht..z2f..z7esircmpwn..z2faerc..z2fwidgets.Terminal.Draw
19.23s 68.07% | git.x2esr.x2eht..z2f..z7esircmpwn..z2faerc..z2fwidgets.Terminal.styleFromCell
6.04s 21.38% | github.x2ecom..z2fddevault..z2fgo..z2dlibvterm.Screen.GetCellAt
1.38s 4.88% | git.x2esr.x2eht..z2f..z7esircmpwn..z2faerc..z2flib..z2fui.Context.Printf
0.62s 2.19% | runtime.mapassign
0.43s 1.52% | runtime.mapaccess2
0.20s 0.71% | runtime.newobject
0.19s 0.67% | runtime.callers (inline)
0.07s 0.25% | runtime.makeslice
0.07s 0.25% | runtime.mallocgc
----------------------------------------------------------+-------------
19.23s 100% | git.x2esr.x2eht..z2f..z7esircmpwn..z2faerc..z2fwidgets.Terminal.Draw
0 0% 99.94% 19.23s 56.03% | git.x2esr.x2eht..z2f..z7esircmpwn..z2faerc..z2fwidgets.Terminal.styleFromCell
19.21s 99.90% | github.x2ecom..z2fddevault..z2fgo..z2dlibvterm.ScreenCell.Attrs
*** After:
----------------------------------------------------------+-------------
flat flat% sum% cum cum% calls calls% + context
----------------------------------------------------------+-------------
0.31s 100% | git.x2esr.x2eht/~sircmpwn/aerc/widgets.Terminal.Draw
0 0% 99.87% 0.31s 1.33% | github.x2ecom/ddevault/go-libvterm.NewPos
0.25s 80.65% | runtime.callers (inline)
0.04s 12.90% | runtime.gomcache (inline)
----------------------------------------------------------+-------------
8.40s 100% | github.x2ecom/ddevault/go-libvterm.Screen.GetCellAt
0 0% 99.87% 8.40s 36.11% | github.x2ecom/ddevault/go-libvterm.Screen.GetCell
7.14s 85.00% | github.x2ecom/ddevault/go-libvterm._cgoCheckPointer
0.54s 6.43% | runtime.callers (inline)
0.35s 4.17% | runtime.exitsyscall
0.11s 1.31% | runtime.deferprocStack
0.07s 0.83% | doentersyscall
0.07s 0.83% | runtime.getg
0.05s 0.6% | runtime.casgstatus
0.03s 0.36% | _init
0.03s 0.36% | runtime.gomcache (inline)
----------------------------------------------------------+-------------
8.46s 100% | git.x2esr.x2eht/~sircmpwn/aerc/widgets.Terminal.Draw
0 0% 99.87% 8.46s 36.37% | github.x2ecom/ddevault/go-libvterm.Screen.GetCellAt
8.40s 99.29% | github.x2ecom/ddevault/go-libvterm.Screen.GetCell
0.06s 0.71% | runtime.callers (inline)
----------------------------------------------------------+-------------
0.31s 100% | git.x2esr.x2eht/~sircmpwn/aerc/widgets.Terminal.styleFromCell
0 0% 99.87% 0.31s 1.33% | github.x2ecom/ddevault/go-libvterm.ScreenCell.Attrs
)
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Fixes: https://todo.sr.ht/~sircmpwn/aerc2/416
Co-authored-by: JD <john1doe@ya.ru>
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Also update to the tcell v2 PaletteColor api, which should keep the chosen
theme of the user intact.
Note, that if $TRUECOLOR is defined and a truecolor given, aerc will now stop
clipping the value to one of the theme colors.
Generally this is desired behaviour though.
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Soves an issue with go1.15 not letting ctty be a parent. See
https://github.com/creack/pty/pull/97 for more details.
Signed-off-by: Guillaume J. Charmes <git+guillaume@charmes.net>
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This reverts commit d07cf6c667a0d497c67196fca9967db71c1e02f6.
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Signed-off-by: Guillaume J. Charmes <git+guillaume@charmes.net>
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off-by-one error
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The relevant change was merged upstream, and thus allows us to clean up
unneeded forks.
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The editor and pager were not properly being reaped, causing resource
leakage whenever a user replies to a message.
Signed-off-by: Kevin Kuehler <keur@xcf.berkeley.edu>
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This adds the Mouseable interface. When this is implemented for a
component that item can accept and process mouseevents.
At the top level when a mouse event is received it is passed to the
grid's handler and then it trickles down until it reaches a component
that can actually handle it, such as the tablist, dirlist or msglist.
A mouse event is passed so that components can handle other things such
as scrolling with the mousewheel. The components themselves then perform
the necessary actions.
Clicking emails in the messagelist opens them in a new tab.
Textinputs can be clicked to position the cursor inside them.
Mouseevents are not forwarded to the terminal at the moment.
Elements which do not handle mouse events are not required to implement
the Mouseable interface.
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vterm.Write and vterm.SetSize race when the window resizes, which
causing the underlying library to segfault.
Signed-off-by: Kevin Kuehler <keur@ocf.berkeley.edu>
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Terminal.damage is accessed when drawing and when invalidating the widget. For
this reason we need to protect it with a mutex.
This seems to fix various damage issues I've been experiencing (where some
regions of the terminal weren't correctly repainted).
Race detector trace:
Read at 0x00c0000c6670 by main goroutine:
git.sr.ht/~sircmpwn/aerc/widgets.(*Terminal).Draw()
/home/simon/src/aerc/widgets/terminal.go:292 +0x191
git.sr.ht/~sircmpwn/aerc/lib/ui.(*Grid).Draw()
/home/simon/src/aerc/lib/ui/grid.go:117 +0x575
git.sr.ht/~sircmpwn/aerc/lib/ui.(*Grid).Draw()
/home/simon/src/aerc/lib/ui/grid.go:117 +0x575
git.sr.ht/~sircmpwn/aerc/widgets.(*MessageViewer).Draw()
/home/simon/src/aerc/widgets/msgviewer.go:231 +0x253
git.sr.ht/~sircmpwn/aerc/lib/ui.(*TabContent).Draw()
/home/simon/src/aerc/lib/ui/tab.go:124 +0x12e
git.sr.ht/~sircmpwn/aerc/lib/ui.(*Grid).Draw()
/home/simon/src/aerc/lib/ui/grid.go:117 +0x575
git.sr.ht/~sircmpwn/aerc/widgets.(*Aerc).Draw()
/home/simon/src/aerc/widgets/aerc.go:95 +0x5a
git.sr.ht/~sircmpwn/aerc/lib/ui.(*UI).Tick()
/home/simon/src/aerc/lib/ui/ui.go:93 +0x1dd
main.main()
/home/simon/src/aerc/aerc.go:105 +0x539
Previous write at 0x00c0000c6670 by goroutine 37:
git.sr.ht/~sircmpwn/aerc/widgets.(*Terminal).onDamage-fm()
/home/simon/src/aerc/widgets/terminal.go:429 +0x131
git.sr.ht/~sircmpwn/go-libvterm._go_handle_damage()
/home/simon/go/pkg/mod/git.sr.ht/~sircmpwn/go-libvterm@v0.0.0-20190421201021-3184f6f13687/vterm.go:481 +0xf9
git.sr.ht/~sircmpwn/go-libvterm._cgoexpwrap_5e22200b58b7__go_handle_damage()
_cgo_gotypes.go:731 +0x58
runtime.call32()
/usr/lib/go/src/runtime/asm_amd64.s:519 +0x3a
git.sr.ht/~sircmpwn/go-libvterm.(*VTerm).Write.func1()
/home/simon/go/pkg/mod/git.sr.ht/~sircmpwn/go-libvterm@v0.0.0-20190421201021-3184f6f13687/vterm.go:329 +0x9d
git.sr.ht/~sircmpwn/go-libvterm.(*VTerm).Write()
/home/simon/go/pkg/mod/git.sr.ht/~sircmpwn/go-libvterm@v0.0.0-20190421201021-3184f6f13687/vterm.go:329 +0x7f
git.sr.ht/~sircmpwn/aerc/widgets.NewTerminal.func1()
/home/simon/src/aerc/widgets/terminal.go:131 +0x18c
Goroutine 37 (running) created at:
git.sr.ht/~sircmpwn/aerc/widgets.NewTerminal()
/home/simon/src/aerc/widgets/terminal.go:121 +0x23f
git.sr.ht/~sircmpwn/aerc/widgets.NewMessageViewer()
/home/simon/src/aerc/widgets/msgviewer.go:147 +0xfbe
git.sr.ht/~sircmpwn/aerc/commands/account.ViewMessage()
/home/simon/src/aerc/commands/account/view-message.go:26 +0x4a4
git.sr.ht/~sircmpwn/aerc/commands.(*Commands).ExecuteCommand()
/home/simon/src/aerc/commands/commands.go:47 +0x1f0
main.main.func1()
/home/simon/src/aerc/aerc.go:76 +0x205
git.sr.ht/~sircmpwn/aerc/widgets.(*Aerc).BeginExCommand.func1()
/home/simon/src/aerc/widgets/aerc.go:262 +0x89
git.sr.ht/~sircmpwn/aerc/widgets.(*ExLine).Event()
/home/simon/src/aerc/widgets/exline.go:47 +0x222
git.sr.ht/~sircmpwn/aerc/widgets.(*Aerc).Event()
/home/simon/src/aerc/widgets/aerc.go:133 +0x83c
git.sr.ht/~sircmpwn/aerc/widgets.(*Aerc).simulate()
/home/simon/src/aerc/widgets/aerc.go:126 +0x12a
git.sr.ht/~sircmpwn/aerc/widgets.(*Aerc).Event()
/home/simon/src/aerc/widgets/aerc.go:148 +0x766
git.sr.ht/~sircmpwn/aerc/lib/ui.(*UI).Tick()
/home/simon/src/aerc/lib/ui/ui.go:86 +0x11b
main.main()
/home/simon/src/aerc/aerc.go:105 +0x539
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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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Signed-off-by: Tom Lebreux <tomlebreux@cock.li>
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