a failure of executing rr on ubuntu14.04

Zhang Yang w90p710 at gmail.com
Wed Feb 3 05:38:22 UTC 2016


I ran into it with rr-4.0.3 and the latest rr( commit id: 832c7f0fea).

2016-02-03 13:34 GMT+08:00 Zhang Yang <w90p710 at gmail.com>:

> Hi Guys,
>
> I am not sure whether its suitable to ask the question, if not , please
> tell me. :-)
> I tried to use rr to debug my qemu on ubuntu14.04, but rr touches a assert.
> my kernel version is 3.16.0-30-generic. Any idea on it?
>
> ➜  qemu-build git:(hotplug) ✗ rr record  x86_64-softmmu/qemu-system-x86_64
> -name test,process=qemu:test -machine pc-i440fx-rhel7.0.0,accel=kvm,usb=off
> -cpu host -m 512 -realtime mlock=off -smp 2,sockets=2,cores=1,threads=1
> -uuid 374dd56c-883e-46ce-9303-19c23c7bfaf8 -no-user-config -nodefaults
> -chardev
> socket,id=charmonitor,path=/home/wyang/work/tmp/test.monitor,server,nowait
> -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc
> -no-kvm-pit-reinjection -no-shutdown -drive
> file=/home/wyang/images/centos7-for-test.qcow2,if=none,id=drive-virtio-disk0,format=qcow2
> -device
> virtio-blk-pci,scsi=off,bus=pci.0,addr=0x6,drive=drive-virtio-disk0,id=virtio-disk0
> -chardev
> socket,id=charchannel0,path=/home/wyang/work/tmp/test.agent,server,nowait
> -serial pty
> rr: Saving the execution of `x86_64-softmmu/qemu-system-x86_64' to trace
> directory `/home/wyang/.local/share/rr/qemu-system-x86_64-2'.
> Warning: option deprecated, use lost_tick_policy property of kvm-pit
> instead.
> [FATAL
> /home/roc/rr/rr/src/record_syscall.cc:3071:rec_process_syscall_arch()
> errno: 0 'Success']
>  (task 31200 (rec:31200) at time 1137)
>  ->  Assertion `t->regs().syscall_result_signed() ==
> -syscall_state.expect_errno' failed to hold. Expected EINVAL for 'ioctl'
> but got result -7; Unknown ioctl(0xc004ae02): type:0xae nr:0x2 dir:0x3
> size:4 addr:0x7fffadd2fb90
> Launch gdb with
>   gdb
> /home/wyang/work/source-code/ucloud/uqemu-kvm-1.5.3-60.x/qemu-build/x86_64-softmmu/qemu-system-x86_64
> and attach to the rr debug server with:
>   target remote :31200
>
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