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authorSimon Ser <contact@emersion.fr>2019-04-28 12:20:04 +0000
committerDrew DeVault <sir@cmpwn.com>2019-04-29 09:29:37 -0400
commit335db0402decf1e0a3b07e7c51ab62a4f6baab50 (patch)
treed6d4b96fc027b9a7d98d9a66817bf9a5a8152a55
parent5685a176747711d0330f1251ad297b13e0621a37 (diff)
lib/ui: fix GridCell.invalid race
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
-rw-r--r--lib/ui/grid.go11
1 files changed, 6 insertions, 5 deletions
diff --git a/lib/ui/grid.go b/lib/ui/grid.go
index 3ac43a4..3fc7f04 100644
--- a/lib/ui/grid.go
+++ b/lib/ui/grid.go
@@ -3,6 +3,7 @@ package ui
import (
"fmt"
"math"
+ "sync/atomic"
)
type Grid struct {
@@ -42,7 +43,7 @@ type GridCell struct {
RowSpan int
ColSpan int
Content Drawable
- invalid bool
+ invalid atomic.Value // bool
}
func NewGrid() *Grid {
@@ -85,7 +86,8 @@ func (grid *Grid) Draw(ctx *Context) {
grid.reflow(ctx)
}
for _, cell := range grid.cells {
- if !cell.invalid && !invalid {
+ cellInvalid := cell.invalid.Load().(bool)
+ if !cellInvalid && !invalid {
continue
}
rows := grid.rowLayout[cell.Row : cell.Row+cell.RowSpan]
@@ -156,11 +158,10 @@ func (grid *Grid) AddChild(content Drawable) *GridCell {
RowSpan: 1,
ColSpan: 1,
Content: content,
- invalid: true,
}
grid.cells = append(grid.cells, cell)
cell.Content.OnInvalidate(grid.cellInvalidated)
- cell.invalid = true
+ cell.invalid.Store(true)
grid.invalidateLayout()
return cell
}
@@ -186,6 +187,6 @@ func (grid *Grid) cellInvalidated(drawable Drawable) {
if cell == nil {
panic(fmt.Errorf("Attempted to invalidate unknown cell"))
}
- cell.invalid = true
+ cell.invalid.Store(true)
grid.DoInvalidate(grid)
}