tree d108e3e4ac65ffd4c4142b69dc6902f2317b3318
parent 4eb17ecd1f1c5d130a0fe5c6bbd03714d315c41a
author Russ Cox <rsc@golang.org> 1372366266 -0400
committer Russ Cox <rsc@golang.org> 1372366266 -0400
golang-hg e98b1f7169c5d8012c6b4e348d7a74c048cccfba

runtime: use gp->sched.sp for stack overflow check

On x86 it is a few words lower on the stack than m->morebuf.sp
so it is a more precise check. Enabling the check requires recording
a valid gp->sched in reflect.call too. This is a good thing in general,
since it will make stack traces during reflect.call work better, and it
may be useful for preemption too.

R=dvyukov
CC=golang-dev
https://golang.org/cl/10709043