[chore] Update go-sqlite3 to 0.18.3 (#3295)

* [chore] Update go-sqlite3 to 0.18.3

* [chore] Fix getting the sqlite3.Conn

go.mod

@@ -44,7 +44,7 @@ require (
 	github.com/miekg/dns v1.1.62
 	github.com/minio/minio-go/v7 v7.0.76
 	github.com/mitchellh/mapstructure v1.5.0
-	github.com/ncruces/go-sqlite3 v0.18.1
+	github.com/ncruces/go-sqlite3 v0.18.3
 	github.com/oklog/ulid v1.3.1
 	github.com/prometheus/client_golang v1.20.3
 	github.com/spf13/cobra v1.8.1

go.sum

@@ -440,8 +440,8 @@ github.com/moul/http2curl v1.0.0 h1:dRMWoAtb+ePxMlLkrCbAqh4TlPHXvoGUSQ323/9Zahs=
 github.com/moul/http2curl v1.0.0/go.mod h1:8UbvGypXm98wA/IqH45anm5Y2Z6ep6O31QGOAZ3H0fQ=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 h1:C3w9PqII01/Oq1c1nUAm88MOHcQC9l5mIlSMApZMrHA=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822/go.mod h1:+n7T8mK8HuQTcFwEeznm/DIxMOiR9yIdICNftLE1DvQ=
-github.com/ncruces/go-sqlite3 v0.18.1 h1:iN8IMZV5EMxpH88NUac9vId23eTKNFUhP7jgY0EBbNc=
-github.com/ncruces/go-sqlite3 v0.18.1/go.mod h1:eEOyZnW1dGTJ+zDpMuzfYamEUBtdFz5zeYhqLBtHxvM=
+github.com/ncruces/go-sqlite3 v0.18.3 h1:tyMa75uh7LcINcfo0WrzOvcTkfz8Hqu0TEPX+KVyes4=
+github.com/ncruces/go-sqlite3 v0.18.3/go.mod h1:HAwOtA+cyEX3iN6YmkpQwfT4vMMgCB7rQRFUdOgEFik=
 github.com/ncruces/go-strftime v0.1.9 h1:bY0MQC28UADQmHmaF5dgpLmImcShSi2kHU9XLdhx/f4=
 github.com/ncruces/go-strftime v0.1.9/go.mod h1:Fwc5htZGVVkseilnfgOVb9mKy6w1naJmn9CehxcKcls=
 github.com/ncruces/julianday v1.0.0 h1:fH0OKwa7NWvniGQtxdJRxAgkBMolni2BjDHaWTxqt7M=

internal/db/sqlite/driver.go

@@ -25,7 +25,6 @@ import (
 
 	"github.com/superseriousbusiness/gotosocial/internal/db"
 
-	"github.com/ncruces/go-sqlite3"
 	sqlite3driver "github.com/ncruces/go-sqlite3/driver"
 	_ "github.com/ncruces/go-sqlite3/embed"     // embed wasm binary
 	_ "github.com/ncruces/go-sqlite3/vfs/memdb" // include memdb vfs
@@ -110,7 +109,7 @@ func (c *sqliteConn) ExecContext(ctx context.Context, query string, args []drive
 
 func (c *sqliteConn) Close() (err error) {
 	// Get acces the underlying raw sqlite3 conn.
-	raw := c.connIface.(sqlite3.DriverConn).Raw()
+	raw := c.connIface.(sqlite3driver.Conn).Raw()
 
 	// see: https://www.sqlite.org/pragma.html#pragma_optimize
 	const onClose = "PRAGMA analysis_limit=1000; PRAGMA optimize;"

vendor/github.com/ncruces/go-sqlite3/blob.go

@@ -21,6 +21,8 @@ type Blob struct {
 	bytes  int64
 	offset int64
 	handle uint32
+	bufptr uint32
+	buflen int64
 }
 
 var _ io.ReadWriteSeeker = &Blob{}
@@ -66,7 +68,7 @@ func (b *Blob) Close() error {
 	}
 
 	r := b.c.call("sqlite3_blob_close", uint64(b.handle))
-
+	b.c.free(b.bufptr)
 	b.handle = 0
 	return b.c.error(r)
 }
@@ -86,17 +88,18 @@ func (b *Blob) Read(p []byte) (n int, err error) {
 		return 0, io.EOF
 	}
 
-	avail := b.bytes - b.offset
 	want := int64(len(p))
+	avail := b.bytes - b.offset
 	if want > avail {
 		want = avail
 	}
-
-	defer b.c.arena.mark()()
-	ptr := b.c.arena.new(uint64(want))
+	if want > b.buflen {
+		b.bufptr = b.c.realloc(b.bufptr, uint64(want))
+		b.buflen = want
+	}
 
 	r := b.c.call("sqlite3_blob_read", uint64(b.handle),
-		uint64(ptr), uint64(want), uint64(b.offset))
+		uint64(b.bufptr), uint64(want), uint64(b.offset))
 	err = b.c.error(r)
 	if err != nil {
 		return 0, err
@@ -106,7 +109,7 @@ func (b *Blob) Read(p []byte) (n int, err error) {
 		err = io.EOF
 	}
 
-	copy(p, util.View(b.c.mod, ptr, uint64(want)))
+	copy(p, util.View(b.c.mod, b.bufptr, uint64(want)))
 	return int(want), err
 }
 
@@ -123,19 +126,20 @@ func (b *Blob) WriteTo(w io.Writer) (n int64, err error) {
 	if want > avail {
 		want = avail
 	}
-
-	defer b.c.arena.mark()()
-	ptr := b.c.arena.new(uint64(want))
+	if want > b.buflen {
+		b.bufptr = b.c.realloc(b.bufptr, uint64(want))
+		b.buflen = want
+	}
 
 	for want > 0 {
 		r := b.c.call("sqlite3_blob_read", uint64(b.handle),
-			uint64(ptr), uint64(want), uint64(b.offset))
+			uint64(b.bufptr), uint64(want), uint64(b.offset))
 		err = b.c.error(r)
 		if err != nil {
 			return n, err
 		}
 
-		mem := util.View(b.c.mod, ptr, uint64(want))
+		mem := util.View(b.c.mod, b.bufptr, uint64(want))
 		m, err := w.Write(mem[:want])
 		b.offset += int64(m)
 		n += int64(m)
@@ -159,11 +163,15 @@ func (b *Blob) WriteTo(w io.Writer) (n int64, err error) {
 //
 // https://sqlite.org/c3ref/blob_write.html
 func (b *Blob) Write(p []byte) (n int, err error) {
-	defer b.c.arena.mark()()
-	ptr := b.c.arena.bytes(p)
+	want := int64(len(p))
+	if want > b.buflen {
+		b.bufptr = b.c.realloc(b.bufptr, uint64(want))
+		b.buflen = want
+	}
+	util.WriteBytes(b.c.mod, b.bufptr, p)
 
 	r := b.c.call("sqlite3_blob_write", uint64(b.handle),
-		uint64(ptr), uint64(len(p)), uint64(b.offset))
+		uint64(b.bufptr), uint64(want), uint64(b.offset))
 	err = b.c.error(r)
 	if err != nil {
 		return 0, err
@@ -187,16 +195,17 @@ func (b *Blob) ReadFrom(r io.Reader) (n int64, err error) {
 	if want < 1 {
 		want = 1
 	}
-
-	defer b.c.arena.mark()()
-	ptr := b.c.arena.new(uint64(want))
+	if want > b.buflen {
+		b.bufptr = b.c.realloc(b.bufptr, uint64(want))
+		b.buflen = want
+	}
 
 	for {
-		mem := util.View(b.c.mod, ptr, uint64(want))
+		mem := util.View(b.c.mod, b.bufptr, uint64(want))
 		m, err := r.Read(mem[:want])
 		if m > 0 {
 			r := b.c.call("sqlite3_blob_write", uint64(b.handle),
-				uint64(ptr), uint64(m), uint64(b.offset))
+				uint64(b.bufptr), uint64(m), uint64(b.offset))
 			err := b.c.error(r)
 			if err != nil {
 				return n, err

vendor/github.com/ncruces/go-sqlite3/config.go

@@ -294,3 +294,17 @@ func autoVacuumCallback(ctx context.Context, mod api.Module, pApp, zSchema, nDbP
 	schema := util.ReadString(mod, zSchema, _MAX_NAME)
 	return uint32(fn(schema, uint(nDbPage), uint(nFreePage), uint(nBytePerPage)))
 }
+
+// SoftHeapLimit imposes a soft limit on heap size.
+//
+// https://sqlite.org/c3ref/hard_heap_limit64.html
+func (c *Conn) SoftHeapLimit(n int64) int64 {
+	return int64(c.call("sqlite3_soft_heap_limit64", uint64(n)))
+}
+
+// SoftHeapLimit imposes a hard limit on heap size.
+//
+// https://sqlite.org/c3ref/hard_heap_limit64.html
+func (c *Conn) HardHeapLimit(n int64) int64 {
+	return int64(c.call("sqlite3_hard_heap_limit64", uint64(n)))
+}

vendor/github.com/ncruces/go-sqlite3/conn.go

@@ -23,6 +23,7 @@ type Conn struct {
 	interrupt  context.Context
 	pending    *Stmt
 	stmts      []*Stmt
+	timer      *time.Timer
 	busy       func(int) bool
 	log        func(xErrorCode, string)
 	collation  func(*Conn, string)
@@ -389,11 +390,25 @@ func timeoutCallback(ctx context.Context, mod api.Module, pDB uint32, count, tmo
 		}
 
 		if delay = min(delay, tmout-prior); delay > 0 {
-			time.Sleep(time.Duration(delay) * time.Millisecond)
-			retry = 1
+			delay := time.Duration(delay) * time.Millisecond
+			if c.interrupt == nil || c.interrupt.Done() == nil {
+				time.Sleep(delay)
+				return 1
+			}
+			if c.timer == nil {
+				c.timer = time.NewTimer(delay)
+			} else {
+				c.timer.Reset(delay)
+			}
+			select {
+			case <-c.interrupt.Done():
+				c.timer.Stop()
+			case <-c.timer.C:
+				return 1
 			}
 		}
-	return retry
+	}
+	return 0
 }
 
 // BusyHandler registers a callback to handle [BUSY] errors.
@@ -492,9 +507,7 @@ func (c *Conn) stmtsIter(yield func(*Stmt) bool) {
 
 // DriverConn is implemented by the SQLite [database/sql] driver connection.
 //
-// It can be used to access SQLite features like [online backup].
-//
-// [online backup]: https://sqlite.org/backup.html
+// Deprecated: use [github.com/ncruces/go-sqlite3/driver.Conn] instead.
 type DriverConn interface {
 	Raw() *Conn
 }

vendor/github.com/ncruces/go-sqlite3/const.go

@@ -7,12 +7,9 @@ const (
 	_ROW  = 100 /* sqlite3_step() has another row ready */
 	_DONE = 101 /* sqlite3_step() has finished executing */
 
-	_UTF8 = 1
-
 	_MAX_NAME         = 1e6 // Self-imposed limit for most NUL terminated strings.
 	_MAX_LENGTH       = 1e9
 	_MAX_SQL_LENGTH   = 1e9
-	_MAX_ALLOCATION_SIZE = 0x7ffffeff
 	_MAX_FUNCTION_ARG = 100
 
 	ptrlen = 4

vendor/github.com/ncruces/go-sqlite3/context.go

@@ -84,9 +84,8 @@ func (ctx Context) ResultFloat(value float64) {
 // https://sqlite.org/c3ref/result_blob.html
 func (ctx Context) ResultText(value string) {
 	ptr := ctx.c.newString(value)
-	ctx.c.call("sqlite3_result_text64",
-		uint64(ctx.handle), uint64(ptr), uint64(len(value)),
-		uint64(ctx.c.freer), _UTF8)
+	ctx.c.call("sqlite3_result_text_go",
+		uint64(ctx.handle), uint64(ptr), uint64(len(value)))
 }
 
 // ResultRawText sets the text result of the function to a []byte.
@@ -94,9 +93,8 @@ func (ctx Context) ResultText(value string) {
 // https://sqlite.org/c3ref/result_blob.html
 func (ctx Context) ResultRawText(value []byte) {
 	ptr := ctx.c.newBytes(value)
-	ctx.c.call("sqlite3_result_text64",
-		uint64(ctx.handle), uint64(ptr), uint64(len(value)),
-		uint64(ctx.c.freer), _UTF8)
+	ctx.c.call("sqlite3_result_text_go",
+		uint64(ctx.handle), uint64(ptr), uint64(len(value)))
 }
 
 // ResultBlob sets the result of the function to a []byte.
@@ -105,9 +103,8 @@ func (ctx Context) ResultRawText(value []byte) {
 // https://sqlite.org/c3ref/result_blob.html
 func (ctx Context) ResultBlob(value []byte) {
 	ptr := ctx.c.newBytes(value)
-	ctx.c.call("sqlite3_result_blob64",
-		uint64(ctx.handle), uint64(ptr), uint64(len(value)),
-		uint64(ctx.c.freer))
+	ctx.c.call("sqlite3_result_blob_go",
+		uint64(ctx.handle), uint64(ptr), uint64(len(value)))
 }
 
 // ResultZeroBlob sets the result of the function to a zero-filled, length n BLOB.
@@ -154,9 +151,8 @@ func (ctx Context) resultRFC3339Nano(value time.Time) {
 	buf := util.View(ctx.c.mod, ptr, maxlen)
 	buf = value.AppendFormat(buf[:0], time.RFC3339Nano)
 
-	ctx.c.call("sqlite3_result_text64",
-		uint64(ctx.handle), uint64(ptr), uint64(len(buf)),
-		uint64(ctx.c.freer), _UTF8)
+	ctx.c.call("sqlite3_result_text_go",
+		uint64(ctx.handle), uint64(ptr), uint64(len(buf)))
 }
 
 // ResultPointer sets the result of the function to NULL, just like [Context.ResultNull],

vendor/github.com/ncruces/go-sqlite3/driver/driver.go

@@ -130,6 +130,11 @@ type SQLite struct {
 	term func(*sqlite3.Conn) error
 }
 
+var (
+	// Ensure these interfaces are implemented:
+	_ driver.DriverContext = &SQLite{}
+)
+
 // Open implements [database/sql/driver.Driver].
 func (d *SQLite) Open(name string) (driver.Conn, error) {
 	c, err := d.newConnector(name)
@@ -255,6 +260,35 @@ func (n *connector) Connect(ctx context.Context) (_ driver.Conn, err error) {
 	return c, nil
 }
 
+// Conn is implemented by the SQLite [database/sql] driver connections.
+//
+// It can be used to access SQLite features like [online backup]:
+//
+//	db, err := driver.Open("temp.db")
+//	if err != nil {
+//		log.Fatal(err)
+//	}
+//	defer db.Close()
+//
+//	conn, err := db.Conn(context.TODO())
+//	if err != nil {
+//		log.Fatal(err)
+//	}
+//
+//	err = conn.Raw(func(driverConn any) error {
+//		conn := driverConn.(driver.Conn)
+//		return conn.Raw().Backup("main", "backup.db")
+//	})
+//	if err != nil {
+//		log.Fatal(err)
+//	}
+//
+// [online backup]: https://sqlite.org/backup.html
+type Conn interface {
+	Raw() *sqlite3.Conn
+	driver.Conn
+}
+
 type conn struct {
 	*sqlite3.Conn
 	txLock   string
@@ -266,10 +300,10 @@ type conn struct {
 
 var (
 	// Ensure these interfaces are implemented:
+	_ Conn                      = &conn{}
+	_ driver.ConnBeginTx        = &conn{}
 	_ driver.ConnPrepareContext = &conn{}
 	_ driver.ExecerContext      = &conn{}
-	_ driver.ConnBeginTx        = &conn{}
-	_ sqlite3.DriverConn        = &conn{}
 )
 
 func (c *conn) Raw() *sqlite3.Conn {

vendor/github.com/ncruces/go-sqlite3/embed/exports.txt

@@ -1,7 +1,4 @@
 aligned_alloc
-free
-malloc
-malloc_destructor
 sqlite3_anycollseq_init
 sqlite3_autovacuum_pages_go
 sqlite3_backup_finish
@@ -9,7 +6,7 @@ sqlite3_backup_init
 sqlite3_backup_pagecount
 sqlite3_backup_remaining
 sqlite3_backup_step
-sqlite3_bind_blob64
+sqlite3_bind_blob_go
 sqlite3_bind_double
 sqlite3_bind_int64
 sqlite3_bind_null
@@ -17,7 +14,7 @@ sqlite3_bind_parameter_count
 sqlite3_bind_parameter_index
 sqlite3_bind_parameter_name
 sqlite3_bind_pointer_go
-sqlite3_bind_text64
+sqlite3_bind_text_go
 sqlite3_bind_value
 sqlite3_bind_zeroblob64
 sqlite3_blob_bytes
@@ -74,17 +71,21 @@ sqlite3_filename_database
 sqlite3_filename_journal
 sqlite3_filename_wal
 sqlite3_finalize
+sqlite3_free
 sqlite3_get_autocommit
 sqlite3_get_auxdata
+sqlite3_hard_heap_limit64
 sqlite3_interrupt
 sqlite3_last_insert_rowid
 sqlite3_limit
+sqlite3_malloc64
 sqlite3_open_v2
 sqlite3_overload_function
 sqlite3_prepare_v3
 sqlite3_progress_handler_go
+sqlite3_realloc64
 sqlite3_reset
-sqlite3_result_blob64
+sqlite3_result_blob_go
 sqlite3_result_double
 sqlite3_result_error
 sqlite3_result_error_code
@@ -93,13 +94,14 @@ sqlite3_result_error_toobig
 sqlite3_result_int64
 sqlite3_result_null
 sqlite3_result_pointer_go
-sqlite3_result_text64
+sqlite3_result_text_go
 sqlite3_result_value
 sqlite3_result_zeroblob64
 sqlite3_rollback_hook_go
 sqlite3_set_authorizer_go
 sqlite3_set_auxdata_go
 sqlite3_set_last_insert_rowid
+sqlite3_soft_heap_limit64
 sqlite3_step
 sqlite3_stmt_busy
 sqlite3_stmt_readonly

vendor/github.com/ncruces/go-sqlite3/go.work.sum

@@ -5,5 +5,6 @@ golang.org/x/term v0.20.0/go.mod h1:8UkIAJTvZgivsXaD6/pH6U9ecQzZ45awqEOzuCvwpFY=
 golang.org/x/term v0.21.0/go.mod h1:ooXLefLobQVslOqselCNF4SxFAaoS6KujMbsGzSDmX0=
 golang.org/x/term v0.22.0/go.mod h1:F3qCibpT5AMpCRfhfT53vVJwhLtIVHhB9XDjfFvnMI4=
 golang.org/x/term v0.23.0/go.mod h1:DgV24QBUrK6jhZXl+20l6UWznPlwAHm1Q1mGHtydmSk=
+golang.org/x/term v0.24.0/go.mod h1:lOBK/LVxemqiMij05LGJ0tzNr8xlmwBRJ81PX6wVLH8=
 golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
 golang.org/x/tools v0.21.1-0.20240508182429-e35e4ccd0d2d/go.mod h1:aiJjzUbINMkxbQROHiO6hDPo2LHcIPhhQsa9DLh0yGk=

vendor/github.com/ncruces/go-sqlite3/internal/alloc/alloc_unix.go

@@ -39,7 +39,7 @@ type mmappedMemory struct {
 func (m *mmappedMemory) Reallocate(size uint64) []byte {
 	com := uint64(len(m.buf))
 	res := uint64(cap(m.buf))
-	if com < size && size < res {
+	if com < size && size <= res {
 		// Round up to the page size.
 		rnd := uint64(unix.Getpagesize() - 1)
 		new := (size + rnd) &^ rnd

vendor/github.com/ncruces/go-sqlite3/internal/alloc/alloc_windows.go

@@ -48,7 +48,7 @@ type virtualMemory struct {
 func (m *virtualMemory) Reallocate(size uint64) []byte {
 	com := uint64(len(m.buf))
 	res := uint64(cap(m.buf))
-	if com < size && size < res {
+	if com < size && size <= res {
 		// Round up to the page size.
 		rnd := uint64(windows.Getpagesize() - 1)
 		new := (size + rnd) &^ rnd

vendor/github.com/ncruces/go-sqlite3/sqlite.go

@@ -86,7 +86,6 @@ type sqlite struct {
 		mask uint32
 	}
 	stack [9]uint64
-	freer uint32
 }
 
 func instantiateSQLite() (sqlt *sqlite, err error) {
@@ -102,14 +101,7 @@ func instantiateSQLite() (sqlt *sqlite, err error) {
 	if err != nil {
 		return nil, err
 	}
-
-	global := sqlt.mod.ExportedGlobal("malloc_destructor")
-	if global == nil {
-		return nil, util.BadBinaryErr
-	}
-
-	sqlt.freer = util.ReadUint32(sqlt.mod, uint32(global.Get()))
-	if sqlt.freer == 0 {
+	if sqlt.getfn("sqlite3_progress_handler_go") == nil {
 		return nil, util.BadBinaryErr
 	}
 	return sqlt, nil
@@ -196,14 +188,19 @@ func (sqlt *sqlite) free(ptr uint32) {
 	if ptr == 0 {
 		return
 	}
-	sqlt.call("free", uint64(ptr))
+	sqlt.call("sqlite3_free", uint64(ptr))
 }
 
 func (sqlt *sqlite) new(size uint64) uint32 {
-	if size > _MAX_ALLOCATION_SIZE {
+	ptr := uint32(sqlt.call("sqlite3_malloc64", size))
+	if ptr == 0 && size != 0 {
 		panic(util.OOMErr)
 	}
-	ptr := uint32(sqlt.call("malloc", size))
+	return ptr
+}
+
+func (sqlt *sqlite) realloc(ptr uint32, size uint64) uint32 {
+	ptr = uint32(sqlt.call("sqlite3_realloc64", uint64(ptr), size))
 	if ptr == 0 && size != 0 {
 		panic(util.OOMErr)
 	}
@@ -214,7 +211,11 @@ func (sqlt *sqlite) newBytes(b []byte) uint32 {
 	if (*[0]byte)(b) == nil {
 		return 0
 	}
-	ptr := sqlt.new(uint64(len(b)))
+	size := len(b)
+	if size == 0 {
+		size = 1
+	}
+	ptr := sqlt.new(uint64(size))
 	util.WriteBytes(sqlt.mod, ptr, b)
 	return ptr
 }

vendor/github.com/ncruces/go-sqlite3/stmt.go

@@ -246,10 +246,9 @@ func (s *Stmt) BindText(param int, value string) error {
 		return TOOBIG
 	}
 	ptr := s.c.newString(value)
-	r := s.c.call("sqlite3_bind_text64",
+	r := s.c.call("sqlite3_bind_text_go",
 		uint64(s.handle), uint64(param),
-		uint64(ptr), uint64(len(value)),
-		uint64(s.c.freer), _UTF8)
+		uint64(ptr), uint64(len(value)))
 	return s.c.error(r)
 }
 
@@ -262,10 +261,9 @@ func (s *Stmt) BindRawText(param int, value []byte) error {
 		return TOOBIG
 	}
 	ptr := s.c.newBytes(value)
-	r := s.c.call("sqlite3_bind_text64",
+	r := s.c.call("sqlite3_bind_text_go",
 		uint64(s.handle), uint64(param),
-		uint64(ptr), uint64(len(value)),
-		uint64(s.c.freer), _UTF8)
+		uint64(ptr), uint64(len(value)))
 	return s.c.error(r)
 }
 
@@ -279,10 +277,9 @@ func (s *Stmt) BindBlob(param int, value []byte) error {
 		return TOOBIG
 	}
 	ptr := s.c.newBytes(value)
-	r := s.c.call("sqlite3_bind_blob64",
+	r := s.c.call("sqlite3_bind_blob_go",
 		uint64(s.handle), uint64(param),
-		uint64(ptr), uint64(len(value)),
-		uint64(s.c.freer))
+		uint64(ptr), uint64(len(value)))
 	return s.c.error(r)
 }
 
@@ -335,10 +332,9 @@ func (s *Stmt) bindRFC3339Nano(param int, value time.Time) error {
 	buf := util.View(s.c.mod, ptr, maxlen)
 	buf = value.AppendFormat(buf[:0], time.RFC3339Nano)
 
-	r := s.c.call("sqlite3_bind_text64",
+	r := s.c.call("sqlite3_bind_text_go",
 		uint64(s.handle), uint64(param),
-		uint64(ptr), uint64(len(buf)),
-		uint64(s.c.freer), _UTF8)
+		uint64(ptr), uint64(len(buf)))
 	return s.c.error(r)
 }
 

vendor/github.com/ncruces/go-sqlite3/vfs/lock.go

@@ -79,16 +79,15 @@ func (f *vfsFile) Lock(lock LockLevel) error {
 		// A PENDING lock is needed before acquiring an EXCLUSIVE lock.
 		if f.lock < LOCK_PENDING {
 			// If we're already RESERVED, we can block indefinitely,
-			// since only new readers may briefly hold the PENDING lock.
+			// since only incoming readers may briefly hold the PENDING lock.
 			if rc := osGetPendingLock(f.File, reserved /* block */); rc != _OK {
 				return rc
 			}
 			f.lock = LOCK_PENDING
 		}
-		// We already have PENDING, so we're just waiting for readers to leave.
-		// If we were RESERVED, we can wait for a little while, before invoking
-		// the busy handler; we will only do this once.
-		if rc := osGetExclusiveLock(f.File, reserved /* wait */); rc != _OK {
+		// We are now PENDING, so we're just waiting for readers to leave.
+		// If we were RESERVED, we can block for a bit before invoking the busy handler.
+		if rc := osGetExclusiveLock(f.File, reserved /* block */); rc != _OK {
 			return rc
 		}
 		f.lock = LOCK_EXCLUSIVE

vendor/github.com/ncruces/go-sqlite3/vfs/os_linux.go

@@ -53,10 +53,11 @@ func osLock(file *os.File, typ int16, start, len int64, timeout time.Duration, d
 			if errno, _ := err.(unix.Errno); errno != unix.EAGAIN {
 				break
 			}
-			if timeout < time.Since(before) {
+			if time.Since(before) > timeout {
 				break
 			}
-			time.Sleep(time.Duration(rand.Int63n(int64(time.Millisecond))))
+			const sleepIncrement = 1024*1024 - 1 // power of two, ~1ms
+			time.Sleep(time.Duration(rand.Int63() & sleepIncrement))
 		}
 	}
 	return osLockErrorCode(err, def)

vendor/github.com/ncruces/go-sqlite3/vfs/os_unix_lock.go

@@ -32,9 +32,9 @@ func osGetPendingLock(file *os.File, block bool) _ErrorCode {
 	return osWriteLock(file, _PENDING_BYTE, 1, timeout)
 }
 
-func osGetExclusiveLock(file *os.File, wait bool) _ErrorCode {
+func osGetExclusiveLock(file *os.File, block bool) _ErrorCode {
 	var timeout time.Duration
-	if wait {
+	if block {
 		timeout = time.Millisecond
 	}
 	// Acquire the EXCLUSIVE lock.

vendor/github.com/ncruces/go-sqlite3/vfs/os_windows.go

@@ -38,9 +38,9 @@ func osGetPendingLock(file *os.File, block bool) _ErrorCode {
 	return osWriteLock(file, _PENDING_BYTE, 1, timeout)
 }
 
-func osGetExclusiveLock(file *os.File, wait bool) _ErrorCode {
+func osGetExclusiveLock(file *os.File, block bool) _ErrorCode {
 	var timeout time.Duration
-	if wait {
+	if block {
 		timeout = time.Millisecond
 	}
 
@@ -134,10 +134,11 @@ func osLock(file *os.File, flags, start, len uint32, timeout time.Duration, def
 			if errno, _ := err.(windows.Errno); errno != windows.ERROR_LOCK_VIOLATION {
 				break
 			}
-			if timeout < time.Since(before) {
+			if time.Since(before) > timeout {
 				break
 			}
-			time.Sleep(time.Duration(rand.Int63n(int64(time.Millisecond))))
+			const sleepIncrement = 1024*1024 - 1 // power of two, ~1ms
+			time.Sleep(time.Duration(rand.Int63() & sleepIncrement))
 		}
 	}
 	return osLockErrorCode(err, def)

vendor/github.com/ncruces/go-sqlite3/vfs/shm.go

@@ -6,6 +6,7 @@ import (
 	"context"
 	"io"
 	"os"
+	"time"
 
 	"github.com/ncruces/go-sqlite3/internal/util"
 	"github.com/tetratelabs/wazero/api"
@@ -49,6 +50,7 @@ type vfsShm struct {
 	path     string
 	regions  []*util.MappedRegion
 	readOnly bool
+	blocking bool
 }
 
 func (s *vfsShm) shmOpen() _ErrorCode {
@@ -76,6 +78,13 @@ func (s *vfsShm) shmOpen() _ErrorCode {
 		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
 		}
@@ -83,7 +92,7 @@ func (s *vfsShm) shmOpen() _ErrorCode {
 			return _IOERR_SHMOPEN
 		}
 	}
-	if rc := osReadLock(s.File, _SHM_DMS, 1, 0); rc != _OK {
+	if rc := osReadLock(s.File, _SHM_DMS, 1, time.Millisecond); rc != _OK {
 		return rc
 	}
 	return _OK
@@ -150,13 +159,18 @@ func (s *vfsShm) shmLock(offset, n int32, flags _ShmFlag) _ErrorCode {
 		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), 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), 0)
+		return osWriteLock(s.File, _SHM_BASE+int64(offset), int64(n), timeout)
 	default:
 		panic(util.AssertErr())
 	}
@@ -181,3 +195,7 @@ func (s *vfsShm) shmUnmap(delete bool) {
 	s.Close()
 	s.File = nil
 }
+
+func (s *vfsShm) shmEnableBlocking(block bool) {
+	s.blocking = block
+}

vendor/github.com/ncruces/go-sqlite3/vfs/vfs.go

@@ -243,6 +243,15 @@ func vfsFileControl(ctx context.Context, mod api.Module, pFile uint32, op _Fcntl
 			return _OK
 		}
 
+	case _FCNTL_LOCK_TIMEOUT:
+		if file, ok := file.(FileSharedMemory); ok {
+			if iface, ok := file.SharedMemory().(interface{ shmEnableBlocking(bool) }); ok {
+				if i := util.ReadUint32(mod, pArg); i == 0 || i == 1 {
+					iface.shmEnableBlocking(i != 0)
+				}
+			}
+		}
+
 	case _FCNTL_PERSIST_WAL:
 		if file, ok := file.(FilePersistentWAL); ok {
 			if i := util.ReadUint32(mod, pArg); int32(i) >= 0 {
@@ -347,7 +356,7 @@ func vfsFileControl(ctx context.Context, mod api.Module, pFile uint32, op _Fcntl
 				out = err.Error()
 			}
 			if out != "" {
-				fn := mod.ExportedFunction("malloc")
+				fn := mod.ExportedFunction("sqlite3_malloc64")
 				stack := [...]uint64{uint64(len(out) + 1)}
 				if err := fn.CallWithStack(ctx, stack[:]); err != nil {
 					panic(err)

vendor/modules.txt

@@ -523,7 +523,7 @@ github.com/modern-go/reflect2
 # github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822
 ## explicit
 github.com/munnerz/goautoneg
-# github.com/ncruces/go-sqlite3 v0.18.1
+# github.com/ncruces/go-sqlite3 v0.18.3
 ## explicit; go 1.21
 github.com/ncruces/go-sqlite3
 github.com/ncruces/go-sqlite3/driver