umod

Prints the module name that corresponds to a specified user space address.

_usymaddr umod(uintptr_t)

The umod function is a data recording function that prints the name of the module that corresponds to a specified user space address.

Example 8-62 How to use umod to print the module name for an address

The example shows how to use umod to print the module names for openat system calls by the date command.

sudo dtrace -qn syscall::openat:entry'/pid == $target/{umod(ucaller);}' -c 'date'

Generates output similar to the following:

CPU     ID                    FUNCTION:NAME
  7 147861                     openat:entry   libc.so.6                                         
  7 147861                     openat:entry   0x0                                               
Mon 20 Feb 18:07:43 GMT 2023