| #!/bin/sh |
| # SPDX-License-Identifier: GPL-2.0 |
| # description: ftrace - function trace on module |
| |
| [ ! -f set_ftrace_filter ] && exit_unsupported |
| |
| : "mod: allows to filter a non exist function" |
| echo 'non_exist_func:mod:non_exist_module' > set_ftrace_filter |
| grep -q "non_exist_func" set_ftrace_filter |
| |
| : "mod: on exist module" |
| echo '*:mod:trace_printk' > set_ftrace_filter |
| if ! modprobe trace-printk ; then |
| echo "No trace-printk sample module - please make CONFIG_SAMPLE_TRACE_PRINTK= |
| m" |
| exit_unresolved; |
| fi |
| |
| : "Wildcard should be resolved after loading module" |
| grep -q "trace_printk_irq_work" set_ftrace_filter |
| |
| : "After removing the filter becomes empty" |
| rmmod trace_printk |
| test `cat set_ftrace_filter | wc -l` -eq 0 |
