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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
This commit is contained in:
Simon Ser 2019-04-28 12:20:04 +00:00 committed by Drew DeVault
parent 5685a17674
commit 335db0402d
1 changed files with 6 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
lib/ui/grid.go
View File

@ -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)
}