void show_stack()

in kernel/traps.c [60:106]

• 35 lines of code
• 10 McCabe index (conditional complexity)

void show_stack(struct task_struct *task, unsigned long *stack,
		const char *loglvl)
{
	unsigned long *endstack, addr;
	int i;

	if (!stack) {
		if (task)
			stack = (unsigned long *)task->thread.ksp;
		else
			stack = (unsigned long *)&stack;
	}

	addr = (unsigned long) stack;
	endstack = (unsigned long *) PAGE_ALIGN(addr);

	printk("%sStack from %08lx:", loglvl, (unsigned long)stack);
	for (i = 0; i < kstack_depth_to_print; i++) {
		if (stack + 1 > endstack)
			break;
		if (i % 8 == 0)
			printk("%s\n       ", loglvl);
		printk("%s %08lx", loglvl, *stack++);
	}

	printk("%s\nCall Trace:", loglvl);
	i = 0;
	while (stack + 1 <= endstack) {
		addr = *stack++;
		/*
		 * If the address is either in the text segment of the
		 * kernel, or in the region which contains vmalloc'ed
		 * memory, it *may* be the address of a calling
		 * routine; if so, print it so that someone tracing
		 * down the cause of the crash will be able to figure
		 * out the call path that was taken.
		 */
		if (((addr >= (unsigned long) _stext) &&
		     (addr <= (unsigned long) _etext))) {
			if (i % 4 == 0)
				pr_emerg("\n       ");
			printk("%s [<%08lx>]", loglvl, addr);
			i++;
		}
	}
	printk("%s\n", loglvl);
}