Linux Device Driver example for dump_stack() to print the stack trace of module loading

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One of the useful options in debugging is to print the call trace/stack trace. Linux kernel provides a function to print the stack trace: dump_stack().

Calling dump_stack() function will print the stack trace at that point.

Code:

#include <linux/module.h>
#include <linux/kernel.h>
static int myinit(void)
{
pr_info("dump_stack myinit\n");
dump_stack();
pr_info("dump_stack after\n");
return 0;
}
static void myexit(void)
{
pr_info("panic myexit\n");
}
module_init(myinit)
module_exit(myexit)
MODULE_LICENSE("GPL");
view raw dump_stack.c hosted with ❤ by GitHub
Output:

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