# zx_ktrace_control

## 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_control(zx_handle_t handle,
                              uint32_t action,
                              uint32_t options,
                              void* ptr);
```

## DESCRIPTION

To use the `zx_trace_control()` 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)