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From: Derrick Stolee <stolee@gmail.com>
To: "SZEDER Gábor" <szeder.dev@gmail.com>,
	"Derrick Stolee via GitGitGadget" <gitgitgadget@gmail.com>
Cc: git@vger.kernel.org, jrnieder@gmail.com,
	jonathantanmy@google.com, sluongng@gmail.com,
	congdanhqx@gmail.com, Derrick Stolee <derrickstolee@github.com>,
	Derrick Stolee <dstolee@microsoft.com>,
	John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>,
	Todd Zullinger <tmz@pobox.com>
Subject: Re: [PATCH 5/7] maintenance: add start/stop subcommands
Date: Tue, 8 Sep 2020 08:43:30 -0400	[thread overview]
Message-ID: <50ae1298-b551-8a49-6821-0659012119ee@gmail.com> (raw)
In-Reply-To: <20200908062914.GC6209@szeder.dev>

On 9/8/2020 2:29 AM, SZEDER Gábor wrote:
> On Fri, Sep 04, 2020 at 03:42:04PM +0000, Derrick Stolee via GitGitGadget wrote:
>> +test_expect_success 'start from empty cron table' '
>> +	GIT_TEST_CRONTAB="test-tool crontab cron.txt" git maintenance start &&
> 
> This command hangs when run on Travis CI's s390x arch.  Now, Travis
> CI's multi-arch support is labelled as an alpha feature and isn't
> exactly bug free, so Cc-ing Adrian and Todd, who reported and tested
> big-endian issues and fixes in the past, in the hope that they can
> confirm.

Sounds like you have found the issue below.

>> diff --git a/t/helper/test-crontab.c b/t/helper/test-crontab.c
>> new file mode 100644
>> index 0000000000..f5db6319c6
>> --- /dev/null
>> +++ b/t/helper/test-crontab.c
>> @@ -0,0 +1,35 @@
>> +#include "test-tool.h"
>> +#include "cache.h"
>> +
>> +/*
>> + * Usage: test-tool cron <file> [-l]
>> + *
>> + * If -l is specified, then write the contents of <file> to stdou.
> 
> s/stdou/stdout/

Thanks.

>> + * Otherwise, write from stdin into <file>.
>> + */
>> +int cmd__crontab(int argc, const char **argv)
>> +{
>> +	char a;
> 
> So 'a' is a char...
> 
>> +	FILE *from, *to;
>> +
>> +	if (argc == 3 && !strcmp(argv[2], "-l")) {
>> +		from = fopen(argv[1], "r");
>> +		if (!from)
>> +			return 0;
>> +		to = stdout;
>> +	} else if (argc == 2) {
>> +		from = stdin;
>> +		to = fopen(argv[1], "w");
>> +	} else
>> +		return error("unknown arguments");
>> +
>> +	while ((a = fgetc(from)) != EOF)
> 
> fgetc() returns an int, which is assigned to a char, which is then
> compared to whatever EOF might be on the platform.  Apparently this
> casting and comparison doesn't work as expected on s390x (I haven't
> even tried to think it through...), and instead of detecting EOF and
> exiting we end up in an endless loop writing 0xff bytes to 'cron.txt',
> while 'git maintenance start' in vain waits for 'test-crontab' to
> exit.
> 
> Changing the type of 'a' to int fixes this issue, and all these tests
> pass.

Thanks for the help here. I'll fix this in the next version.

-Stolee

  reply	other threads:[~2020-09-08 16:41 UTC|newest]

Thread overview: 62+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-04 15:41 [PATCH 0/7] Maintenance III: Background maintenance Derrick Stolee via GitGitGadget
2020-09-04 15:42 ` [PATCH 1/7] maintenance: optionally skip --auto process Derrick Stolee via GitGitGadget
2020-09-04 15:42 ` [PATCH 2/7] maintenance: add --schedule option and config Derrick Stolee via GitGitGadget
2020-09-08 13:07   ` Đoàn Trần Công Danh
2020-09-09 12:14     ` Derrick Stolee
2020-09-04 15:42 ` [PATCH 3/7] for-each-repo: run subcommands on configured repos Derrick Stolee via GitGitGadget
2020-09-04 15:42 ` [PATCH 4/7] maintenance: add [un]register subcommands Derrick Stolee via GitGitGadget
2020-09-04 15:42 ` [PATCH 5/7] maintenance: add start/stop subcommands Derrick Stolee via GitGitGadget
2020-09-08  6:29   ` SZEDER Gábor
2020-09-08 12:43     ` Derrick Stolee [this message]
2020-09-08 19:31     ` Junio C Hamano
2020-09-04 15:42 ` [PATCH 6/7] maintenance: recommended schedule in register/start Derrick Stolee via GitGitGadget
2020-09-04 15:42 ` [PATCH 7/7] maintenance: add troubleshooting guide to docs Derrick Stolee via GitGitGadget
2020-09-11 17:49 ` [PATCH v2 0/7] Maintenance III: Background maintenance Derrick Stolee via GitGitGadget
2020-09-11 17:49   ` [PATCH v2 1/7] maintenance: optionally skip --auto process Derrick Stolee via GitGitGadget
2020-09-11 17:49   ` [PATCH v2 2/7] maintenance: add --schedule option and config Derrick Stolee via GitGitGadget
2020-09-11 17:49   ` [PATCH v2 3/7] for-each-repo: run subcommands on configured repos Derrick Stolee via GitGitGadget
2020-09-11 17:49   ` [PATCH v2 4/7] maintenance: add [un]register subcommands Derrick Stolee via GitGitGadget
2020-09-17 14:05     ` Đoàn Trần Công Danh
2020-09-11 17:49   ` [PATCH v2 5/7] maintenance: add start/stop subcommands Derrick Stolee via GitGitGadget
2020-09-11 17:49   ` [PATCH v2 6/7] maintenance: recommended schedule in register/start Derrick Stolee via GitGitGadget
2020-09-29 19:48     ` Martin Ågren
2020-09-30 20:11       ` Derrick Stolee
2020-10-01 20:38         ` Derrick Stolee
2020-10-02  0:38           ` Đoàn Trần Công Danh
2020-10-02  1:55             ` Derrick Stolee
2020-10-05 13:16               ` Đoàn Trần Công Danh
2020-10-05 18:17                 ` Derrick Stolee
2020-09-11 17:49   ` [PATCH v2 7/7] maintenance: add troubleshooting guide to docs Derrick Stolee via GitGitGadget
2020-10-05 12:57   ` [PATCH v3 0/7] Maintenance III: Background maintenance Derrick Stolee via GitGitGadget
2020-10-05 12:57     ` [PATCH v3 1/7] maintenance: optionally skip --auto process Derrick Stolee via GitGitGadget
2020-10-05 12:57     ` [PATCH v3 2/7] maintenance: add --schedule option and config Derrick Stolee via GitGitGadget
2020-10-05 12:57     ` [PATCH v3 3/7] for-each-repo: run subcommands on configured repos Derrick Stolee via GitGitGadget
2020-10-05 12:57     ` [PATCH v3 4/7] maintenance: add [un]register subcommands Derrick Stolee via GitGitGadget
2020-10-05 12:57     ` [PATCH v3 5/7] maintenance: add start/stop subcommands Derrick Stolee via GitGitGadget
2020-10-05 12:57     ` [PATCH v3 6/7] maintenance: use default schedule if not configured Derrick Stolee via GitGitGadget
2020-10-05 19:57       ` Martin Ågren
2020-10-08 13:32         ` Derrick Stolee
2020-10-05 12:57     ` [PATCH v3 7/7] maintenance: add troubleshooting guide to docs Derrick Stolee via GitGitGadget
2020-10-15 17:21     ` [PATCH v4 0/8] Maintenance III: Background maintenance Derrick Stolee via GitGitGadget
2020-10-15 17:21       ` [PATCH v4 1/8] maintenance: optionally skip --auto process Derrick Stolee via GitGitGadget
2020-10-15 17:21       ` [PATCH v4 2/8] maintenance: add --schedule option and config Derrick Stolee via GitGitGadget
2021-02-09 14:06         ` Ævar Arnfjörð Bjarmason
2021-02-09 16:54           ` Derrick Stolee
2021-05-10 12:16             ` Ævar Arnfjörð Bjarmason
2021-05-10 18:42               ` Junio C Hamano
2020-10-15 17:21       ` [PATCH v4 3/8] for-each-repo: run subcommands on configured repos Derrick Stolee via GitGitGadget
2021-05-03 16:10         ` Andrzej Hunt
2021-05-03 17:01           ` Eric Sunshine
2021-05-03 19:26             ` Eric Sunshine
2021-05-03 19:43           ` Derrick Stolee
2020-10-15 17:22       ` [PATCH v4 4/8] maintenance: add [un]register subcommands Derrick Stolee via GitGitGadget
2020-10-15 17:22       ` [PATCH v4 5/8] maintenance: add start/stop subcommands Derrick Stolee via GitGitGadget
2020-12-09 18:51         ` Josh Steadmon
2020-12-09 19:16           ` Josh Steadmon
2020-12-09 21:59             ` Derrick Stolee
2020-12-10  0:13             ` Junio C Hamano
2020-12-10  1:52               ` Derrick Stolee
2020-12-10  6:54                 ` Junio C Hamano
2020-10-15 17:22       ` [PATCH v4 6/8] maintenance: create maintenance.strategy config Derrick Stolee via GitGitGadget
2020-10-15 17:22       ` [PATCH v4 7/8] maintenance: use 'incremental' strategy by default Derrick Stolee via GitGitGadget
2020-10-15 17:22       ` [PATCH v4 8/8] maintenance: add troubleshooting guide to docs Derrick Stolee via GitGitGadget

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