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Re: [Qemu-devel] [RFC 0/5] Slow-path for atomic instruction translation
From: |
alvise rigo |
Subject: |
Re: [Qemu-devel] [RFC 0/5] Slow-path for atomic instruction translation |
Date: |
Wed, 27 May 2015 09:20:54 +0200 |
I'm going to respin these patches soon, I've found some issues that
I'm addressing now.
Thank you for your feedback,
alvise
On Tue, May 26, 2015 at 11:51 PM, Emilio G. Cota <address@hidden> wrote:
> On Mon, May 11, 2015 at 11:10:05 +0200, alvise rigo wrote:
>> the last commit was b8df9208f357d2b36e1b19634aea973618dc7ba8.
>
> Thanks.
>
> Unfortunately a segfault still happens very early:
>
> $ gdb arm-softmmu/qemu-system-arm
> GNU gdb (Ubuntu/Linaro 7.4-2012.04-0ubuntu2.1) 7.4-2012.04
> Copyright (C) 2012 Free Software Foundation, Inc.
> License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
> This is free software: you are free to change and redistribute it.
> There is NO WARRANTY, to the extent permitted by law. Type "show copying"
> and "show warranty" for details.
> This GDB was configured as "x86_64-linux-gnu".
> For bug reporting instructions, please see:
> <http://bugs.launchpad.net/gdb-linaro/>...
> Reading symbols from
> /local/home/cota/src/qemu/arm-softmmu/qemu-system-arm...done.
> (gdb) set args -M vexpress-a9 -kernel img/arm/zImage -drive
> file=img/arm/rootfs.ext2,if=sd -append "console=ttyAMA0,115200
> root=/dev/mmcblk0" -net nic,model=lan9118 -net user -nographic -smp 1
> (gdb) r
> Starting program: /local/home/cota/src/qemu/arm-softmmu/qemu-system-arm -M
> vexpress-a9 -kernel img/arm/zImage -drive file=img/arm/rootfs.ext2,if=sd
> -append "console=ttyAMA0,115200 root=/dev/mmcblk0" -net nic,model=lan9118
> -net user -nographic -smp 1
> [Thread debugging using libthread_db enabled]
> Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
> [New Thread 0x7fffe9447700 (LWP 4309)]
> [New Thread 0x7fffe5246700 (LWP 4310)]
> WARNING: Image format was not specified for 'img/arm/rootfs.ext2' and probing
> guessed raw.
> Automatically detecting the format is dangerous for raw images,
> write operations on block 0 will be restricted.
> Specify the 'raw' format explicitly to remove the restrictions.
> [New Thread 0x7fffe4a45700 (LWP 4311)]
> audio: Could not init `oss' audio driver
>
> Program received signal SIGUSR1, User defined signal 1.
> [Switching to Thread 0x7fffe4a45700 (LWP 4311)]
> pthread_cond_wait@@GLIBC_2.3.2 ()
> at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
> 162 ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S: No such
> file or directory.
> (gdb) cont
> Continuing.
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x0000555555655c34 in test_bit (addr=<optimized out>, nr=<optimized out>)
> at /local/home/cota/src/qemu/include/qemu/bitops.h:119
> 119 return 1UL & (addr[BIT_WORD(nr)] >> (nr & (BITS_PER_LONG-1)));
> (gdb) bt
> #0 0x0000555555655c34 in test_bit (addr=<optimized out>, nr=<optimized out>)
> at /local/home/cota/src/qemu/include/qemu/bitops.h:119
> #1 cpu_physical_memory_excl_is_dirty (addr=18446744073709551615)
> at /local/home/cota/src/qemu/include/exec/ram_addr.h:214
> #2 tlb_set_page (cpu=<optimized out>, vaddr=<optimized out>, paddr=503316480,
> prot=<optimized out>, mmu_idx=3, size=<optimized out>)
> at /local/home/cota/src/qemu/cputlb.c:327
> #3 0x0000555555712091 in arm_cpu_handle_mmu_fault (cs=0x55555632c4e0,
> address=<optimized out>, access_type=0, mmu_idx=3)
> at /local/home/cota/src/qemu/target-arm/helper.c:5726
> #4 0x0000555555704f70 in tlb_fill (cs=0x55555632c4e0, addr=<optimized out>,
> is_write=<optimized out>, mmu_idx=<optimized out>,
> retaddr=140737065132893)
> at /local/home/cota/src/qemu/target-arm/op_helper.c:69
> #5 0x000055555565733f in helper_le_ldul_mmu (env=0x555556334730,
> addr=503316484, mmu_idx=3, retaddr=<optimized out>)
> at /local/home/cota/src/qemu/softmmu_template.h:190
> #6 0x00007fffe6c623db in code_gen_buffer ()
> #7 0x00005555556148ba in cpu_tb_exec (
> tb_ptr=0x7fffe6c62320 "A\213n\374\205\355\017\205\207",
> cpu=0x55555632c4e0)
> at /local/home/cota/src/qemu/cpu-exec.c:199
> #8 cpu_arm_exec (env=0x555556334730)
> at /local/home/cota/src/qemu/cpu-exec.c:519
> #9 0x000055555563a880 in tcg_cpu_exec (env=0x555556334730)
> at /local/home/cota/src/qemu/cpus.c:1354
> #10 tcg_exec_all () at /local/home/cota/src/qemu/cpus.c:1387
> #11 qemu_tcg_cpu_thread_fn (arg=<optimized out>)
> at /local/home/cota/src/qemu/cpus.c:1032
> #12 0x00007ffff40dfe9a in start_thread (arg=0x7fffe4a45700)
> at pthread_create.c:308
> #13 0x00007ffff3e0d38d in clone ()
> at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
> #14 0x0000000000000000 in ?? ()
>
> Emilio
- Re: [Qemu-devel] [RFC 0/5] Slow-path for atomic instruction translation, (continued)