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runtime: increase g0 stack size in non-cgo case

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Currently, for non-cgo programs, the g0 stack size is 8 KiB on
most platforms. With PGO which could cause aggressive inlining in
the runtime, the runtime stack frames are larger and could
overflow the 8 KiB g0 stack. Increase it to 16 KiB. This is only
one per OS thread, so it shouldn't increase memory use much.

Fixes #62120.
Fixes #62489.

Change-Id: I565b154517021f1fd849424dafc3f0f26a755cac
Reviewed-on: https://go-review.googlesource.com/c/go/+/526995
Reviewed-by: Michael Pratt <mpratt@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
This commit is contained in:
Cherry Mui 2023-09-08 12:14:30 -04:00
parent 2b3c1c5937
commit c6d550a668
1 changed files with 2 additions and 2 deletions
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4
src/runtime/proc.go
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@ -1542,7 +1542,7 @@ func mstart0() {
// but is somewhat arbitrary. // but is somewhat arbitrary.
size := gp.stack.hi size := gp.stack.hi
if size == 0 { if size == 0 {
size = 8192 * sys.StackGuardMultiplier size = 16384 * sys.StackGuardMultiplier
} }
gp.stack.hi = uintptr(noescape(unsafe.Pointer(&size))) gp.stack.hi = uintptr(noescape(unsafe.Pointer(&size)))
gp.stack.lo = gp.stack.hi - size + 1024 gp.stack.lo = gp.stack.hi - size + 1024
@ -1938,7 +1938,7 @@ func allocm(pp *p, fn func(), id int64) *m {
if iscgo || mStackIsSystemAllocated() { if iscgo || mStackIsSystemAllocated() {
mp.g0 = malg(-1) mp.g0 = malg(-1)
} else { } else {
mp.g0 = malg(8192 * sys.StackGuardMultiplier) mp.g0 = malg(16384 * sys.StackGuardMultiplier)
} }
mp.g0.m = mp mp.g0.m = mp