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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright 2025 Linaro Limited
*
* Unit test for initjmp()
*/
#include <compiler.h>
#include <setjmp.h>
#include <stdbool.h>
#include <test/lib.h>
#include <test/ut.h>
#include <vsprintf.h>
static bool ep_entered;
static jmp_buf return_buf;
static void __noreturn entrypoint(void)
{
ep_entered = true;
/* Jump back to the main routine */
longjmp(return_buf, 1);
/* Not reached */
panic("longjmp failed\n");
}
static int lib_initjmp(struct unit_test_state *uts)
{
int ret;
void *stack;
jmp_buf buf;
/* Arbitrary but smaller values (< page size?) fail on SANDBOX */
size_t stack_sz = 8192;
(void)entrypoint;
ep_entered = false;
stack = malloc(stack_sz);
ut_assertnonnull(stack);
/*
* Prepare return_buf so that entrypoint may jump back just after the
* if()
*/
if (!setjmp(return_buf)) {
/* return_buf initialized, entrypoint not yet called */
/*
* Prepare another jump buffer to jump into entrypoint with the
* given stack
*/
ret = initjmp(buf, entrypoint, stack, stack_sz);
ut_assertok(ret);
/* Jump into entrypoint */
longjmp(buf, 1);
/*
* Not reached since entrypoint is expected to branch after
* the if()
*/
ut_assert(false);
}
ut_assert(ep_entered);
free(stack);
return 0;
}
LIB_TEST(lib_initjmp, 0);
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