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Re: [Qemu-devel] qemu-system-nios2 hangs when emulator is quit
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From: |
Paolo Bonzini |
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Subject: |
Re: [Qemu-devel] qemu-system-nios2 hangs when emulator is quit |
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Date: |
Tue, 10 Oct 2017 17:19:33 +0200 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0 |
On 10/10/2017 10:58, Marek Vasut wrote:
>> #0 0x00007ffff7931945 in pthread_cond_wait@@GLIBC_2.3.2 () at
>> /lib64/libpthread.so.0
>> #1 0x00005555557cf9c5 in qemu_cond_wait (address@hidden <qemu_pause_cond>,
>> address@hidden <qemu_global_mutex>) at util/qemu-thread-posix.c:161
>> #2 0x0000555555606ee8 in pause_all_vcpus () at cpus.c:1620
>> #3 0x00005555555cc43a in main (argc=<optimized out>, argv=<optimized out>,
>> envp=<optimized out>)
>> at vl.c:4906
>>
>> Looks like the CPU does not get stopped right? Unfortunately, I've got no
>> good clue how to debug that further right now...
> I'd look at pause_all_vcpus() and check why it is stuck.
> I'm a bit overloaded at the moment, so I don't have time to dig in it.
>
It's actually the CPU thread that is stuck because the
start-of-translation-block test is wrong and never succeeds:
0x7fd715fff0c0: mov -0x14(%rsp),%ebp
0x7fd715fff0c4: test %ebp,%ebp
0x7fd715fff0c6: jl 0x7fd715fff0e4
It should be using %r14, not %rsp. I've sent a patch.
Paolo