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| author | ioworker0 <ioworker0@gmail.com> | 2023-04-24 06:37:52 +0000 |
|---|---|---|
| committer | Gopher Robot <gobot@golang.org> | 2023-04-26 04:06:08 +0000 |
| commit | ada0eec8277449ecd6383c86bc2e5fe7e7058fc7 (patch) | |
| tree | 2a6b4dabb1427c617cabd0920ed3f75925376835 /src/runtime | |
| parent | 3c59639b902fada0a2e5a6a35bafd10fc9183b89 (diff) | |
| download | go-ada0eec8277449ecd6383c86bc2e5fe7e7058fc7.tar.xz | |
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: 35e7f8e5cc0b045043a88d9f304ef5bb1e9c1ab2
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>
Diffstat (limited to 'src/runtime')
| -rw-r--r-- | src/runtime/mem_linux.go | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/runtime/mem_linux.go b/src/runtime/mem_linux.go index 31815fb421..b456f7f2ff 100644 --- a/src/runtime/mem_linux.go +++ b/src/runtime/mem_linux.go @@ -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) } |