On 30/11/2022 09:07:50+0100, Alexander Kanavin wrote: > On Tue, 29 Nov 2022 at 16:45, Stephen Jolley <sjolley.yp...@gmail.com> wrote: > > We’d welcome a proposal/series on how to move forward with the Y2038 work > > for 32 bit platforms. > > I have the following proposal: > > 1. A branch is made where: > a. "-D_TIME_BITS=64 -D_FILE_OFFSET_BITS=64" is enabled globally. > b. qemu is always started with "-rtc base=2040-01-01", simulating > Y2038 actually occurring. > c. an additional runtime test verifies that both RTC clock and system > clock report 2040. > > 2. This branch is run through a-full on the autobuilder. Any uncovered > issues are filed as bugs. >
I ran a-full with "-D_TIME_BITS=64 -D_FILE_OFFSET_BITS=64" last week, it didn't go too well gcc-sanitizer and pulseaudio being the main offenders but buildtools needs to be investigated. > 3. Once *all* of the bugs are addressed, repeat point 2. > > 4. Once there are no more open bugs, 1a is merged into master. > > Any fatal flaws in the plan? > > It's not hard to see that Y2038 problem is real and serious, e.g. on > qemux86 core-image-full-cmdline built from master: > > root@qemux86:~# ls / > bin boot dev etc home lib lost+found media mnt proc > run sbin sys tmp usr var > root@qemux86:~# date -s "2040-01-01" > Sun Jan 1 00:00:00 UTC 2040 > root@qemux86:~# ls / > bin boot dev etc home lib lost+found media mnt proc > run sbin sys tmp usr var > root@qemux86:~# ls / > -sh: ls: command not found > > On qemux86_64 the same sequence works as expected, of course. > The main issue with the plan is that we are not running tests on 32 qemu anymore. -- Alexandre Belloni, co-owner and COO, Bootlin Embedded Linux and Kernel engineering https://bootlin.com
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