diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/runtime/stack.go | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/src/runtime/stack.go b/src/runtime/stack.go index eeac66d1ce..6e1f07bf73 100644 --- a/src/runtime/stack.go +++ b/src/runtime/stack.go @@ -1033,6 +1033,17 @@ func newstack() { // Allocate a bigger segment and move the stack. oldsize := gp.stack.hi - gp.stack.lo newsize := oldsize * 2 + + // Make sure we grow at least as much as needed to fit the new frame. + // (This is just an optimization - the caller of morestack will + // recheck the bounds on return.) + if f := findfunc(gp.sched.pc); f.valid() { + max := uintptr(funcMaxSPDelta(f)) + for newsize-oldsize < max+_StackGuard { + newsize *= 2 + } + } + if newsize > maxstacksize { print("runtime: goroutine stack exceeds ", maxstacksize, "-byte limit\n") print("runtime: sp=", hex(sp), " stack=[", hex(gp.stack.lo), ", ", hex(gp.stack.hi), "]\n") |