/* * Simple stack backtrace regression test module * * (C) Copyright 2008 Intel Corporation * Author: Arjan van de Ven * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; version 2 * of the License. */ #include #include #include #include #include #include static void backtrace_test_normal(void) { pr_info("Testing a backtrace from process context.\n"); pr_info("The following trace is a kernel self test and not a bug!\n"); dump_stack(); } static DECLARE_COMPLETION(backtrace_work); static void backtrace_test_irq_callback(unsigned long data) { dump_stack(); complete(&backtrace_work); } static DECLARE_TASKLET(backtrace_tasklet, &backtrace_test_irq_callback, 0); static void backtrace_test_irq(void) { pr_info("Testing a backtrace from irq context.\n"); pr_info("The following trace is a kernel self test and not a bug!\n"); init_completion(&backtrace_work); tasklet_schedule(&backtrace_tasklet); wait_for_completion(&backtrace_work); } #ifdef CONFIG_STACKTRACE static void backtrace_test_saved(void) { struct stack_trace trace; unsigned long entries[8]; pr_info("Testing a saved backtrace.\n"); pr_info("The following trace is a kernel self test and not a bug!\n"); trace.nr_entries = 0; trace.max_entries = ARRAY_SIZE(entries); trace.entries = entries; trace.skip = 0; save_stack_trace(&trace); print_stack_trace(&trace, 0); } #else static void backtrace_test_saved(void) { pr_info("Saved backtrace test skipped.\n"); } #endif static int backtrace_regression_test(void) { pr_info("====[ backtrace testing ]===========\n"); backtrace_test_normal(); backtrace_test_irq(); backtrace_test_saved(); pr_info("====[ end of backtrace testing ]====\n"); return 0; } static void exitf(void) { } module_init(backtrace_regression_test); module_exit(exitf); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Arjan van de Ven "); 5d53098ed4b'>diff
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