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# zx_ktrace_write
## NAME
<!-- Contents of this heading updated by update-docs-from-fidl, do not edit. -->
TODO(fxbug.dev/32938)
## SYNOPSIS
<!-- Contents of this heading updated by update-docs-from-fidl, do not edit. -->
```c
#include <zircon/syscalls.h>
zx_status_t zx_ktrace_write(zx_handle_t handle,
uint32_t id,
uint32_t arg0,
uint32_t arg1);
```
## DESCRIPTION
To use the `zx_ktrace_write()` function, you must specify
`kernel.enable-debugging-syscalls=true` on the kernel command line. Otherwise,
the function returns **ZX_ERR_NOT_SUPPORTED**.
TODO(fxbug.dev/32938)
## RIGHTS
<!-- Contents of this heading updated by update-docs-from-fidl, do not edit. -->
*handle* must have resource kind **ZX_RSRC_KIND_ROOT**.
## RETURN VALUE
TODO(fxbug.dev/32938)
## ERRORS
TODO(fxbug.dev/32938)
## SEE ALSO
TODO(fxbug.dev/32938)