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/*
* Linux DTrace
* Copyright (c) 2025, Oracle and/or its affiliates. All rights reserved.
* Licensed under the Universal Permissive License v 1.0 as shown at
* http://oss.oracle.com/licenses/upl.
*/
#!/usr/sbin/dtrace -s
/*
* SYNOPSIS
* sudo ./202built-in-variables-args.d
*
* DESCRIPTION
* A probe's arguments can be accessed through the built-in
* variables arg0, arg1, arg2, etc. These are all signed,
* 64-bit integers, whose meanings depend on the probe.
*
* Some probes have typed arguments args[0], args[1], args[2],
* etc. To see the types, use "dtrace -lvn $probe". Their
* meanings are described in the documentation.
*
* When arguments are typed, they may also be reordered.
* So there may be no correspondence between, say, arg0
* and args[0].
*
* Typically, it is better to use the typed args[] when
* the probe has them.
*/
syscall::write:entry
{
printf("Write %d bytes to fd %d\n", args[2], arg0);
exit(0);
}
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