qbit/go
1
0
Fork 0
mirror of https://github.com/golang/go synced 2024-11-23 16:30:06 -07:00
Code Releases Activity

runtime: grow stack more than 2x if the new frame is large

Browse Source 
We might as well grow the stack at least as large as we'll need for
the frame that is calling morestack. It doesn't help with the
lots-of-small-frames case, but it may help a bit with the
few-big-frames case.

Update #18138

Change-Id: I1f49c97706a70e20b30433cbec99a7901528ea52
Reviewed-on: https://go-review.googlesource.com/c/go/+/225800
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
This commit is contained in:
Keith Randall 2020-03-27 11:17:00 -07:00
parent 6ed4661807
commit b1760f3a27
1 changed files with 11 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
src/runtime/stack.go
View File

@ -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")