diff options
Diffstat (limited to 'vendor/github.com/ncruces/go-sqlite3/internal/util')
3 files changed, 62 insertions, 5 deletions
diff --git a/vendor/github.com/ncruces/go-sqlite3/internal/util/mmap.go b/vendor/github.com/ncruces/go-sqlite3/internal/util/mmap.go index 5788eeb24..613bb90b1 100644 --- a/vendor/github.com/ncruces/go-sqlite3/internal/util/mmap.go +++ b/vendor/github.com/ncruces/go-sqlite3/internal/util/mmap.go @@ -1,4 +1,4 @@ -//go:build unix && (386 || arm || amd64 || arm64 || riscv64 || ppc64le) && !(sqlite3_noshm || sqlite3_nosys) +//go:build unix && !sqlite3_nosys package util @@ -55,10 +55,10 @@ type MappedRegion struct { used bool } -func MapRegion(ctx context.Context, mod api.Module, f *os.File, offset int64, size int32, prot int) (*MappedRegion, error) { +func MapRegion(ctx context.Context, mod api.Module, f *os.File, offset int64, size int32, readOnly bool) (*MappedRegion, error) { s := ctx.Value(moduleKey{}).(*moduleState) r := s.new(ctx, mod, size) - err := r.mmap(f, offset, prot) + err := r.mmap(f, offset, readOnly) if err != nil { return nil, err } @@ -75,7 +75,11 @@ func (r *MappedRegion) Unmap() error { return err } -func (r *MappedRegion) mmap(f *os.File, offset int64, prot int) error { +func (r *MappedRegion) mmap(f *os.File, offset int64, readOnly bool) error { + prot := unix.PROT_READ + if !readOnly { + prot |= unix.PROT_WRITE + } _, err := unix.MmapPtr(int(f.Fd()), offset, r.addr, uintptr(r.size), prot, unix.MAP_SHARED|unix.MAP_FIXED) r.used = err == nil diff --git a/vendor/github.com/ncruces/go-sqlite3/internal/util/mmap_other.go b/vendor/github.com/ncruces/go-sqlite3/internal/util/mmap_other.go index a2fbf24df..e11f953a7 100644 --- a/vendor/github.com/ncruces/go-sqlite3/internal/util/mmap_other.go +++ b/vendor/github.com/ncruces/go-sqlite3/internal/util/mmap_other.go @@ -1,4 +1,4 @@ -//go:build !unix || !(386 || arm || amd64 || arm64 || riscv64 || ppc64le) || sqlite3_noshm || sqlite3_nosys +//go:build !unix || sqlite3_nosys package util diff --git a/vendor/github.com/ncruces/go-sqlite3/internal/util/mmap_windows.go b/vendor/github.com/ncruces/go-sqlite3/internal/util/mmap_windows.go new file mode 100644 index 000000000..fdf6f439a --- /dev/null +++ b/vendor/github.com/ncruces/go-sqlite3/internal/util/mmap_windows.go @@ -0,0 +1,53 @@ +//go:build !sqlite3_nosys + +package util + +import ( + "context" + "os" + "reflect" + "unsafe" + + "github.com/tetratelabs/wazero/api" + "golang.org/x/sys/windows" +) + +type MappedRegion struct { + windows.Handle + Data []byte + addr uintptr +} + +func MapRegion(ctx context.Context, mod api.Module, f *os.File, offset int64, size int32) (*MappedRegion, error) { + h, err := windows.CreateFileMapping(windows.Handle(f.Fd()), nil, windows.PAGE_READWRITE, 0, 0, nil) + if h == 0 { + return nil, err + } + + a, err := windows.MapViewOfFile(h, windows.FILE_MAP_WRITE, + uint32(offset>>32), uint32(offset), uintptr(size)) + if a == 0 { + windows.CloseHandle(h) + return nil, err + } + + res := &MappedRegion{Handle: h, addr: a} + // SliceHeader, although deprecated, avoids a go vet warning. + sh := (*reflect.SliceHeader)(unsafe.Pointer(&res.Data)) + sh.Len = int(size) + sh.Cap = int(size) + sh.Data = a + return res, nil +} + +func (r *MappedRegion) Unmap() error { + if r.Data == nil { + return nil + } + err := windows.UnmapViewOfFile(r.addr) + if err != nil { + return err + } + r.Data = nil + return windows.CloseHandle(r.Handle) +} |