C++ (Cpp) kmemcheck_show_all Examples

Example #1

void kmemcheck_show(struct pt_regs *regs)
{
	struct kmemcheck_context *data = &__get_cpu_var(kmemcheck_context);

	BUG_ON(!irqs_disabled());

	if (unlikely(data->balance != 0)) {
		kmemcheck_show_all();
		kmemcheck_error_save_bug(regs);
		data->balance = 0;
		return;
	}

	
	if (kmemcheck_show_all() == 0)
		return;

	++data->balance;

	
	if (!(regs->flags & X86_EFLAGS_TF))
		data->flags = regs->flags;

	regs->flags |= X86_EFLAGS_TF;
	regs->flags &= ~X86_EFLAGS_IF;
}

Example #2

File: kmemcheck.c Project: 03199618/linux

/*
 * Called from the #DB handler.
 */
void kmemcheck_hide(struct pt_regs *regs)
{
	struct kmemcheck_context *data = &__get_cpu_var(kmemcheck_context);
	int n;

	BUG_ON(!irqs_disabled());

	if (unlikely(data->balance != 1)) {
		kmemcheck_show_all();
		kmemcheck_error_save_bug(regs);
		data->n_addrs = 0;
		data->balance = 0;

		if (!(data->flags & X86_EFLAGS_TF))
			regs->flags &= ~X86_EFLAGS_TF;
		if (data->flags & X86_EFLAGS_IF)
			regs->flags |= X86_EFLAGS_IF;
		return;
	}

	if (kmemcheck_enabled)
		n = kmemcheck_hide_all();
	else
		n = kmemcheck_show_all();

	if (n == 0)
		return;

	--data->balance;

	data->n_addrs = 0;

	if (!(data->flags & X86_EFLAGS_TF))
		regs->flags &= ~X86_EFLAGS_TF;
	if (data->flags & X86_EFLAGS_IF)
		regs->flags |= X86_EFLAGS_IF;
}

Example #3

File: kmemcheck.c Project: 03199618/linux

/*
 * Called from the #PF handler.
 */
void kmemcheck_show(struct pt_regs *regs)
{
	struct kmemcheck_context *data = &__get_cpu_var(kmemcheck_context);

	BUG_ON(!irqs_disabled());

	if (unlikely(data->balance != 0)) {
		kmemcheck_show_all();
		kmemcheck_error_save_bug(regs);
		data->balance = 0;
		return;
	}

	/*
	 * None of the addresses actually belonged to kmemcheck. Note that
	 * this is not an error.
	 */
	if (kmemcheck_show_all() == 0)
		return;

	++data->balance;

	/*
	 * The IF needs to be cleared as well, so that the faulting
	 * instruction can run "uninterrupted". Otherwise, we might take
	 * an interrupt and start executing that before we've had a chance
	 * to hide the page again.
	 *
	 * NOTE: In the rare case of multiple faults, we must not override
	 * the original flags:
	 */
	if (!(regs->flags & X86_EFLAGS_TF))
		data->flags = regs->flags;

	regs->flags |= X86_EFLAGS_TF;
	regs->flags &= ~X86_EFLAGS_IF;
}