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| author | Keith Randall <khr@golang.org> | 2023-10-05 12:20:11 -0700 |
|---|---|---|
| committer | Keith Randall <khr@golang.org> | 2023-11-30 20:05:58 +0000 |
| commit | 446a5dcf5a3230ce9832682d8f521071d8a34a2b (patch) | |
| tree | 9dd711e5ad2b3c31e1a5e04e9d7ffdb185e7c424 /src/bytes | |
| parent | bda1ef13f8f9954d20b712ece649776c272f8526 (diff) | |
| download | go-446a5dcf5a3230ce9832682d8f521071d8a34a2b.tar.gz go-446a5dcf5a3230ce9832682d8f521071d8a34a2b.zip | |
bytes: add a boundary test for Count of 1 byte
This bottoms out in internal/bytealg.Count, which does a fair amount
of avx shenanigans. Make sure we're not reading out of bounds.
Change-Id: Ied0e461f536f75acc24c6797f7fc74e3f3901c10
Reviewed-on: https://go-review.googlesource.com/c/go/+/533116
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Jorropo <jorropo.pgm@gmail.com>
Reviewed-by: Achille Roussel <achille.roussel@gmail.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Keith Randall <khr@google.com>
Diffstat (limited to 'src/bytes')
| -rw-r--r-- | src/bytes/boundary_test.go | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/bytes/boundary_test.go b/src/bytes/boundary_test.go index f9855fcb05..67f377e089 100644 --- a/src/bytes/boundary_test.go +++ b/src/bytes/boundary_test.go @@ -98,3 +98,18 @@ func TestIndexNearPageBoundary(t *testing.T) { } q[len(q)-1] = 0 } + +func TestCountNearPageBoundary(t *testing.T) { + t.Parallel() + b := dangerousSlice(t) + for i := range b { + c := Count(b[i:], []byte{1}) + if c != 0 { + t.Fatalf("Count(b[%d:], {1})=%d, want 0\n", i, c) + } + c = Count(b[:i], []byte{0}) + if c != i { + t.Fatalf("Count(b[:%d], {0})=%d, want %d\n", i, c, i) + } + } +} |