Stowage/go
2
0
Fork 0
mirror of https://github.com/golang/go.git synced 2025-12-08 06:10:04 +00:00
Code Issues Projects Releases Packages Wiki Activity

cmd/compile: experiment which clobbers all dead pointer fields

Browse source 
The experiment "clobberdead" clobbers all pointer fields that the
compiler thinks are dead, just before and after every safepoint.
Useful for debugging the generation of live pointer bitmaps.

Helped find the following issues:
Update #15936
Update #16026
Update #16095
Update #18860

Change-Id: Id1d12f86845e3d93bae903d968b1eac61fc461f9
Reviewed-on: https://go-review.googlesource.com/23924
Run-TryBot: Keith Randall <khr@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
This commit is contained in:
Keith Randall 2016-06-08 22:02:08 -07:00
parent e516227554
commit 1e72bf6218
22 changed files with 225 additions and 14 deletions
Download patch file Download diff file Expand all files Collapse all files

6
src/runtime/runtime-gdb_test.go
View file

@ -69,6 +69,7 @@ func checkGdbPython(t *testing.T) {
const helloSource = `
import "fmt"
import "runtime"
var gslice []string
func main() {
mapvar := make(map[string]string,5)
@ -78,9 +79,10 @@ func main() {
ptrvar := &strvar
slicevar := make([]string, 0, 16)
slicevar = append(slicevar, mapvar["abc"])
fmt.Println("hi") // line 12
fmt.Println("hi") // line 13
_ = ptrvar
gslice = slicevar
runtime.KeepAlive(mapvar)
}
`
@ -211,7 +213,7 @@ func testGdbPython(t *testing.T, cgo bool) {
t.Fatalf("info locals failed: %s", bl)
}
btGoroutineRe := regexp.MustCompile(`^#0\s+runtime.+at`)
btGoroutineRe := regexp.MustCompile(`^#0\s+(0x[0-9a-f]+\s+in\s+)?runtime.+at`)
if bl := blocks["goroutine 2 bt"]; !btGoroutineRe.MatchString(bl) {
t.Fatalf("goroutine 2 bt failed: %s", bl)
}