acb2964d65
Some minor improvements, but biggest for here is ErrPipeListenerClosed is no longer an errors.New where the string matches the text of the now exported net.ErrClosed in the stdlib, but is just assigned to net.ErrClosed directly. This should allow us to get rid of the string check for "use of closed network connection" here now.. Signed-off-by: Daniel Canter <dcanter@microsoft.com>
75 lines
2.1 KiB
Go
75 lines
2.1 KiB
Go
//go:build windows
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// +build windows
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package etw
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import (
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"bytes"
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"encoding/binary"
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"syscall"
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)
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// eventData maintains a buffer which builds up the data for an ETW event. It
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// needs to be paired with EventMetadata which describes the event.
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type eventData struct {
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buffer bytes.Buffer
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}
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// toBytes returns the raw binary data containing the event data. The returned
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// value is not copied from the internal buffer, so it can be mutated by the
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// eventData object after it is returned.
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func (ed *eventData) toBytes() []byte {
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return ed.buffer.Bytes()
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}
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// writeString appends a string, including the null terminator, to the buffer.
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func (ed *eventData) writeString(data string) {
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_, _ = ed.buffer.WriteString(data)
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_ = ed.buffer.WriteByte(0)
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}
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// writeInt8 appends a int8 to the buffer.
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func (ed *eventData) writeInt8(value int8) {
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_ = ed.buffer.WriteByte(uint8(value))
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}
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// writeInt16 appends a int16 to the buffer.
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func (ed *eventData) writeInt16(value int16) {
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_ = binary.Write(&ed.buffer, binary.LittleEndian, value)
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}
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// writeInt32 appends a int32 to the buffer.
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func (ed *eventData) writeInt32(value int32) {
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_ = binary.Write(&ed.buffer, binary.LittleEndian, value)
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}
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// writeInt64 appends a int64 to the buffer.
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func (ed *eventData) writeInt64(value int64) {
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_ = binary.Write(&ed.buffer, binary.LittleEndian, value)
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}
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// writeUint8 appends a uint8 to the buffer.
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func (ed *eventData) writeUint8(value uint8) {
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_ = ed.buffer.WriteByte(value)
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}
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// writeUint16 appends a uint16 to the buffer.
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func (ed *eventData) writeUint16(value uint16) {
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_ = binary.Write(&ed.buffer, binary.LittleEndian, value)
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}
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// writeUint32 appends a uint32 to the buffer.
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func (ed *eventData) writeUint32(value uint32) {
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_ = binary.Write(&ed.buffer, binary.LittleEndian, value)
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}
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// writeUint64 appends a uint64 to the buffer.
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func (ed *eventData) writeUint64(value uint64) {
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_ = binary.Write(&ed.buffer, binary.LittleEndian, value)
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}
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// writeFiletime appends a FILETIME to the buffer.
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func (ed *eventData) writeFiletime(value syscall.Filetime) {
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_ = binary.Write(&ed.buffer, binary.LittleEndian, value)
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}
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