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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
commit | 76cb841cb886eef6b3bee341a2266c76578724ad (patch) | |
tree | f5892e5ba6cc11949952a6ce4ecbe6d516d6ce58 /kernel/backtracetest.c | |
parent | Initial commit. (diff) | |
download | linux-upstream.tar.xz linux-upstream.zip |
Adding upstream version 4.19.249.upstream/4.19.249upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'kernel/backtracetest.c')
-rw-r--r-- | kernel/backtracetest.c | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/kernel/backtracetest.c b/kernel/backtracetest.c new file mode 100644 index 000000000..1323360d9 --- /dev/null +++ b/kernel/backtracetest.c @@ -0,0 +1,91 @@ +/* + * Simple stack backtrace regression test module + * + * (C) Copyright 2008 Intel Corporation + * Author: Arjan van de Ven <arjan@linux.intel.com> + * + * 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 <linux/completion.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/module.h> +#include <linux/sched.h> +#include <linux/stacktrace.h> + +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 <arjan@linux.intel.com>"); |