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runtime: clean up adjustpointer and eliminate write barrier

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Commit a5c3bbe modified adjustpointers to use *uintptrs instead of
*unsafe.Pointers for manipulating stack pointers for clarity and to
eliminate the unnecessary write barrier when writing the updated stack
pointer.

This commit makes the equivalent change to adjustpointer.

Change-Id: I6dc309590b298bdd86ecdc9737db848d6786c3f7
Reviewed-on: https://go-review.googlesource.com/17148
Reviewed-by: Rick Hudson <rlh@golang.org>
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Austin Clements 2015-11-23 11:34:16 -05:00
parent 71cc445cf9
commit d62d831882
1 changed files with 5 additions and 5 deletions
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10
src/runtime/stack.go
View file

@ -521,15 +521,15 @@ type adjustinfo struct {
// Adjustpointer checks whether *vpp is in the old stack described by adjinfo.
// If so, it rewrites *vpp to point into the new stack.
func adjustpointer(adjinfo *adjustinfo, vpp unsafe.Pointer) {
pp := (*unsafe.Pointer)(vpp)
pp := (*uintptr)(vpp)
p := *pp
if stackDebug >= 4 {
print(" ", pp, ":", p, "\n")
print(" ", pp, ":", hex(p), "\n")
}
if adjinfo.old.lo <= uintptr(p) && uintptr(p) < adjinfo.old.hi {
*pp = add(p, adjinfo.delta)
if adjinfo.old.lo <= p && p < adjinfo.old.hi {
*pp = p + adjinfo.delta
if stackDebug >= 3 {
print(" adjust ptr ", pp, ":", p, " -> ", *pp, "\n")
print(" adjust ptr ", pp, ":", hex(p), " -> ", hex(*pp), "\n")
}
}
}