# Memory test. Tries userspace copies covering
# the entire 32-bit address space.

global addr

%{
	static char buf[16384];
%}

function copy_more:long(addr:long)
%{
	char __user *src = (char __user *)(long)THIS->addr;
	if (access_ok(VERIFY_READ, src, 2048))
		THIS->__retvalue = _stp_copy_from_user (buf, src, 2048);
	else
		THIS->__retvalue = -1;
%}	

probe kernel.function("sys_read") {
	printf("copying from %x ... ", addr)
	ret = copy_more(addr)
	if (ret)
		if (ret == -1)
			printf("FAILED (bad address)\n")
		else
			printf("FAILED (page_fault)\n")
	else
		printf("GOOD\n")
	addr += 4096
	if (addr > 0xffffffff)
		exit()
}

probe end {
	printf("\nDONE. Test succeeded if you see this and there\n")
	printf("are no might_sleep warnings in the system log.\n")
}