bump ncruces/go-sqlite3 to v0.20.2 (#3524)

1 files changed, 168 insertions, 0 deletions

diff --git a/vendor/github.com/ncruces/go-sqlite3/vfs/shm_ofd.go b/vendor/github.com/ncruces/go-sqlite3/vfs/shm_ofd.go
new file mode 100644
index 000000000..75c8fbcfb
--- /dev/null
+++ b/vendor/github.com/ncruces/go-sqlite3/vfs/shm_ofd.go
@@ -0,0 +1,168 @@
+//go:build (linux || darwin) && (386 || arm || amd64 || arm64 || riscv64 || ppc64le) && !(sqlite3_flock || sqlite3_dotlk || sqlite3_nosys)
+
+package vfs
+
+import (
+	"context"
+	"io"
+	"os"
+	"sync"
+	"time"
+
+	"github.com/tetratelabs/wazero/api"
+	"golang.org/x/sys/unix"
+
+	"github.com/ncruces/go-sqlite3/internal/util"
+)
+
+type vfsShm struct {
+	*os.File
+	path     string
+	regions  []*util.MappedRegion
+	readOnly bool
+	blocking bool
+	sync.Mutex
+}
+
+var _ blockingSharedMemory = &vfsShm{}
+
+func (s *vfsShm) shmOpen() _ErrorCode {
+	if s.File == nil {
+		f, err := os.OpenFile(s.path,
+			unix.O_RDWR|unix.O_CREAT|unix.O_NOFOLLOW, 0666)
+		if err != nil {
+			f, err = os.OpenFile(s.path,
+				unix.O_RDONLY|unix.O_CREAT|unix.O_NOFOLLOW, 0666)
+			s.readOnly = true
+		}
+		if err != nil {
+			return _CANTOPEN
+		}
+		s.File = f
+	}
+
+	// Dead man's switch.
+	if lock, rc := osTestLock(s.File, _SHM_DMS, 1); rc != _OK {
+		return _IOERR_LOCK
+	} else if lock == unix.F_WRLCK {
+		return _BUSY
+	} else if lock == unix.F_UNLCK {
+		if s.readOnly {
+			return _READONLY_CANTINIT
+		}
+		// Do not use a blocking lock here.
+		// If the lock cannot be obtained immediately,
+		// it means some other connection is truncating the file.
+		// And after it has done so, it will not release its lock,
+		// but only downgrade it to a shared lock.
+		// So no point in blocking here.
+		// The call below to obtain the shared DMS lock may use a blocking lock.
+		if rc := osWriteLock(s.File, _SHM_DMS, 1, 0); rc != _OK {
+			return rc
+		}
+		if err := s.Truncate(0); err != nil {
+			return _IOERR_SHMOPEN
+		}
+	}
+	return osReadLock(s.File, _SHM_DMS, 1, time.Millisecond)
+}
+
+func (s *vfsShm) shmMap(ctx context.Context, mod api.Module, id, size int32, extend bool) (uint32, _ErrorCode) {
+	// Ensure size is a multiple of the OS page size.
+	if int(size)&(unix.Getpagesize()-1) != 0 {
+		return 0, _IOERR_SHMMAP
+	}
+
+	if rc := s.shmOpen(); rc != _OK {
+		return 0, rc
+	}
+
+	// Check if file is big enough.
+	o, err := s.Seek(0, io.SeekEnd)
+	if err != nil {
+		return 0, _IOERR_SHMSIZE
+	}
+	if n := (int64(id) + 1) * int64(size); n > o {
+		if !extend {
+			return 0, _OK
+		}
+		if s.readOnly || osAllocate(s.File, n) != nil {
+			return 0, _IOERR_SHMSIZE
+		}
+	}
+
+	r, err := util.MapRegion(ctx, mod, s.File, int64(id)*int64(size), size, s.readOnly)
+	if err != nil {
+		return 0, _IOERR_SHMMAP
+	}
+	s.regions = append(s.regions, r)
+	if s.readOnly {
+		return r.Ptr, _READONLY
+	}
+	return r.Ptr, _OK
+}
+
+func (s *vfsShm) shmLock(offset, n int32, flags _ShmFlag) _ErrorCode {
+	// Argument check.
+	if n <= 0 || offset < 0 || offset+n > _SHM_NLOCK {
+		panic(util.AssertErr())
+	}
+	switch flags {
+	case
+		_SHM_LOCK | _SHM_SHARED,
+		_SHM_LOCK | _SHM_EXCLUSIVE,
+		_SHM_UNLOCK | _SHM_SHARED,
+		_SHM_UNLOCK | _SHM_EXCLUSIVE:
+		//
+	default:
+		panic(util.AssertErr())
+	}
+	if n != 1 && flags&_SHM_EXCLUSIVE == 0 {
+		panic(util.AssertErr())
+	}
+
+	var timeout time.Duration
+	if s.blocking {
+		timeout = time.Millisecond
+	}
+
+	switch {
+	case flags&_SHM_UNLOCK != 0:
+		return osUnlock(s.File, _SHM_BASE+int64(offset), int64(n))
+	case flags&_SHM_SHARED != 0:
+		return osReadLock(s.File, _SHM_BASE+int64(offset), int64(n), timeout)
+	case flags&_SHM_EXCLUSIVE != 0:
+		return osWriteLock(s.File, _SHM_BASE+int64(offset), int64(n), timeout)
+	default:
+		panic(util.AssertErr())
+	}
+}
+
+func (s *vfsShm) shmUnmap(delete bool) {
+	if s.File == nil {
+		return
+	}
+
+	// Unmap regions.
+	for _, r := range s.regions {
+		r.Unmap()
+	}
+	s.regions = nil
+
+	// Close the file.
+	if delete {
+		os.Remove(s.path)
+	}
+	s.Close()
+	s.File = nil
+}
+
+func (s *vfsShm) shmBarrier() {
+	s.Lock()
+	//lint:ignore SA2001 memory barrier.
+	s.Unlock()
+}
+
+func (s *vfsShm) shmEnableBlocking(block bool) {
+	s.blocking = block
+}