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[dev.cc] all: merge default (e4ab8f908aac) into dev.cc

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TBR=austin
CC=golang-codereviews
https://golang.org/cl/179040044
This commit is contained in:
Russ Cox 2014-11-20 11:48:08 -05:00
commit 50e0749f87
45 changed files with 429 additions and 155 deletions
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11
src/runtime/malloc.go
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@ -477,6 +477,8 @@ func GC() {
// linker-provided
var noptrdata struct{}
var enoptrdata struct{}
var noptrbss struct{}
var enoptrbss struct{}
// SetFinalizer sets the finalizer associated with x to f.
@ -553,8 +555,13 @@ func SetFinalizer(obj interface{}, finalizer interface{}) {
// func main() {
// runtime.SetFinalizer(Foo, nil)
// }
// The segments are, in order: text, rodata, noptrdata, data, bss, noptrbss.
if uintptr(unsafe.Pointer(&noptrdata)) <= uintptr(e.data) && uintptr(e.data) < uintptr(unsafe.Pointer(&enoptrbss)) {
// The relevant segments are: noptrdata, data, bss, noptrbss.
// We cannot assume they are in any order or even contiguous,
// due to external linking.
if uintptr(unsafe.Pointer(&noptrdata)) <= uintptr(e.data) && uintptr(e.data) < uintptr(unsafe.Pointer(&enoptrdata)) ||
uintptr(unsafe.Pointer(&data)) <= uintptr(e.data) && uintptr(e.data) < uintptr(unsafe.Pointer(&edata)) ||
uintptr(unsafe.Pointer(&bss)) <= uintptr(e.data) && uintptr(e.data) < uintptr(unsafe.Pointer(&ebss)) ||
uintptr(unsafe.Pointer(&noptrbss)) <= uintptr(e.data) && uintptr(e.data) < uintptr(unsafe.Pointer(&enoptrbss)) {
return
}
gothrow("runtime.SetFinalizer: pointer not in allocated block")