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Date: Tue, 12 Mar 2024 10:06:32 +0800
From: Hongliang Wang <wanghongliang@...ngson.cn>
To: musl@...ts.openwall.com
Subject: Re: loongarch64 atomics not working?
在 2024/3/12 上午8:51, Rich Felker 写道:
> There's been a report of mksh hanging on loongarch64, at least under
> qemu, apparently hanging in a_cas_p:
>
> (gdb) run
> Starting program: /mksh
> ^C
> Program received signal SIGINT, Interrupt.
> a_cas_p (p=0x120054288 <vdso_func>, t=0x12003b970 <cgt_init>, s=0x7fffffffc34c)
> at ./src/internal/atomic.h:94
> warning: 94 ./src/internal/atomic.h: No such file or directory
> (gdb) bt
> #0 a_cas_p (p=0x120054288 <vdso_func>, t=0x12003b970 <cgt_init>,
> s=0x7fffffffc34c) at ./src/internal/atomic.h:94
> #1 cgt_init (clk=0, ts=0x7ffffffefb60) at src/time/clock_gettime.c:51
> #2 0x000000012003ba4c in __clock_gettime (clk=clk@...ry=0,
> ts=ts@...ry=0x7ffffffefb60) at src/time/clock_gettime.c:67
> #3 0x000000012003830c in gettimeofday (tv=tv@...ry=0x7ffffffefba0,
> tz=tz@...ry=0x0) at src/time/gettimeofday.c:9
> #4 0x000000012002f098 in change_winsz () at var.c:1718
> #5 0x0000000120000348 in main_init (lp=<synthetic pointer>,
> sp=<synthetic pointer>, argv=0x7ffffffefd18, argc=1) at main.c:369
> #6 main (argc=<optimized out>, argv=<optimized out>) at main.c:738
>
> This is very basic usage, just the vdso clock_gettime init code trying
> to replace a pointer atomically. Is it working on real hardware? I'm
> trying to figure out if this is a qemu bug, or if the asm or the asm
> argument constraints are wrong in musl's
> arch/loongarch64/atomic_arch.h.
>
> Rich
>
We will test it on real hardware to confirm if it can work as soon as
possible.
Regards,
Hongliang Wang
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