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82 lines
1.9 KiB
82 lines
1.9 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Simple stack backtrace regression test module |
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* |
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* (C) Copyright 2008 Intel Corporation |
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* Author: Arjan van de Ven <[email protected]> |
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*/ |
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#include <linux/completion.h> |
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#include <linux/delay.h> |
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#include <linux/interrupt.h> |
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#include <linux/module.h> |
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#include <linux/sched.h> |
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#include <linux/stacktrace.h> |
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static void backtrace_test_normal(void) |
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{ |
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pr_info("Testing a backtrace from process context.\n"); |
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pr_info("The following trace is a kernel self test and not a bug!\n"); |
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dump_stack(); |
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} |
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static DECLARE_COMPLETION(backtrace_work); |
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static void backtrace_test_irq_callback(unsigned long data) |
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{ |
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dump_stack(); |
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complete(&backtrace_work); |
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} |
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static DECLARE_TASKLET_OLD(backtrace_tasklet, &backtrace_test_irq_callback); |
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static void backtrace_test_irq(void) |
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{ |
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pr_info("Testing a backtrace from irq context.\n"); |
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pr_info("The following trace is a kernel self test and not a bug!\n"); |
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init_completion(&backtrace_work); |
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tasklet_schedule(&backtrace_tasklet); |
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wait_for_completion(&backtrace_work); |
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} |
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#ifdef CONFIG_STACKTRACE |
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static void backtrace_test_saved(void) |
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{ |
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unsigned long entries[8]; |
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unsigned int nr_entries; |
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pr_info("Testing a saved backtrace.\n"); |
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pr_info("The following trace is a kernel self test and not a bug!\n"); |
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nr_entries = stack_trace_save(entries, ARRAY_SIZE(entries), 0); |
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stack_trace_print(entries, nr_entries, 0); |
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} |
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#else |
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static void backtrace_test_saved(void) |
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{ |
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pr_info("Saved backtrace test skipped.\n"); |
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} |
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#endif |
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static int backtrace_regression_test(void) |
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{ |
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pr_info("====[ backtrace testing ]===========\n"); |
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backtrace_test_normal(); |
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backtrace_test_irq(); |
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backtrace_test_saved(); |
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pr_info("====[ end of backtrace testing ]====\n"); |
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return 0; |
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} |
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static void exitf(void) |
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{ |
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} |
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module_init(backtrace_regression_test); |
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module_exit(exitf); |
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MODULE_LICENSE("GPL"); |
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MODULE_AUTHOR("Arjan van de Ven <[email protected]>");
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