From: Andreas Schwab <schwab@linux-m68k.org>
To: u-boot@lists.denx.de
Subject: [PATCH v2 2/2] test: unit test for longjmp
Date: Wed, 24 Mar 2021 10:18:28 +0100 [thread overview]
Message-ID: <875z1goqor.fsf@igel.home> (raw)
In-Reply-To: <90e8d095-9a0a-2524-131c-49e79a47aa08@gmail.com> (Sean Anderson's message of "Mon, 22 Mar 2021 09:30:41 -0400")
On M?r 22 2021, Sean Anderson wrote:
> int test_longjmp_ret(int i)
> {
> jmp_buf env;
> int ret;
> int foo = i;
>
> ret = setjmp(env);
> if (ret)
> return foo;
> foo = 0x1000;
> longjmp(env, i);
> /* We should not arrive here */
> return foo;
This is undefined. When modifying a non-volatile auto variable between
setjmp and longjmp, there is no requirement that the value is preserved.
Andreas.
--
Andreas Schwab, schwab at linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1
"And now for something completely different."
next prev parent reply other threads:[~2021-03-24 9:18 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-22 11:02 [PATCH v2 0/2] riscv: simplify longjmp Heinrich Schuchardt
2021-03-22 11:02 ` [PATCH v2 1/2] " Heinrich Schuchardt
2021-03-22 12:53 ` Sean Anderson
2021-03-23 11:54 ` Leo Liang
2021-03-22 11:02 ` [PATCH v2 2/2] test: unit test for longjmp Heinrich Schuchardt
2021-03-22 13:23 ` Sean Anderson
2021-03-22 13:30 ` Sean Anderson
2021-03-22 16:42 ` Heinrich Schuchardt
2021-03-23 13:30 ` Sean Anderson
2021-03-24 9:18 ` Andreas Schwab [this message]
2021-03-24 11:16 ` Heinrich Schuchardt
2021-03-24 12:39 ` Andreas Schwab
2021-03-24 13:28 ` Heinrich Schuchardt
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