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# zx_ktrace_read
## NAME
<!-- Updated by update-docs-from-fidl, do not edit. -->
TODO(fxbug.dev/32938)
## SYNOPSIS
<!-- Updated by update-docs-from-fidl, do not edit. -->
```c
#include <zircon/syscalls.h>
zx_status_t zx_ktrace_read(zx_handle_t handle,
void* data,
uint32_t offset,
size_t data_size,
size_t* actual);
```
## DESCRIPTION
To use the `zx_ktrace_read()` 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
<!-- 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)