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runtime: add a alignment check 

The Linux implementation requires that the address addr be
page-aligned, and allows length to be zero.

See Linux notes:
https://man7.org/linux/man-pages/man2/madvise.2.html

Change-Id: Ic49960c32991ef12f23de2de76e9689567c82d03
GitHub-Last-Rev: 35e7f8e5cc
GitHub-Pull-Request: golang/go#59793
Reviewed-on: https://go-review.googlesource.com/c/go/+/488015
Auto-Submit: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
ioworker0 2023-04-24 06:37:52 +00:00 committed by Gopher Robot
parent 3c59639b90
commit ada0eec827
1 changed files with 5 additions and 0 deletions
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5
src/runtime/mem_linux.go
View File

@ -92,6 +92,11 @@ func sysHugePageOS(v unsafe.Pointer, n uintptr) {
}
func sysNoHugePageOS(v unsafe.Pointer, n uintptr) {
if uintptr(v)&(physPageSize-1) != 0 {
// The Linux implementation requires that the address
// addr be page-aligned, and allows length to be zero.
throw("unaligned sysNoHugePageOS")
}
madvise(v, n, _MADV_NOHUGEPAGE)
}