[Qemu-devel] [Bug 1828429] [NEW] qemu-system-aarch64 crashes with assertion failed while running GCC 9 test suite

[Brett Neumeier]

Public bug reported:

I am using QEMU 4.0.0 on an x86_64 Linux 4.19.0 host, the guest is an
Aarch64 linux 5.0.0 system. The same issue occurred on QEMU 3.1.0.

While running the GCC 9.1 test suite on the guest system, QEMU crashes
with:

qemu-system-aarch64: [...]/qemu-4.0.0/tcg/tcg.c:3952: tcg_gen_code:
Assertion `s->gen_insn_end_off[num_insns] == off' failed.

I am able to reproduce the issue reliably, which is encouraging. The
full QEMU command line is:

qemu-system-aarch64 -kernel kernel-5.0.0cbl1 -append "root=/dev/vda1 ro
init=/sbin/init console=ttyAMA0" -name guest=cbl -drive
file=cbl.qcow2,index=0,media=disk,format=qcow2 -drive
file=swap.qcow2,index=1,media=disk,format=qcow2 -machine virt -cpu
cortex-a57 -smp 4,sockets=1,cores=2,threads=2 -m size=8192 -netdev
tap,id=network0,ifname=tapcbl2,script=no,downscript=no -device virtio-
net-device,netdev=network0,mac=aa:bb:cc:dd:ee:02 -nographic

The specific GCC test that causes QEMU to crash is vldX.c run from
advsimd-intrinsics.exp; I can reproduce via "make check-gcc RUNTESTFLAGS
=advsimd-intrinsics.exp=vldX.c"

If there is anything I can do to further triage the issue, or gain more
insight into what is going on, please let me know! I am eager to help
however I can.

** Affects: qemu
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1828429

Title:
  qemu-system-aarch64 crashes with assertion failed while running GCC 9
  test suite

Status in QEMU:
  New

Bug description:
  I am using QEMU 4.0.0 on an x86_64 Linux 4.19.0 host, the guest is an
  Aarch64 linux 5.0.0 system. The same issue occurred on QEMU 3.1.0.

  While running the GCC 9.1 test suite on the guest system, QEMU crashes
  with:

  qemu-system-aarch64: [...]/qemu-4.0.0/tcg/tcg.c:3952: tcg_gen_code:
  Assertion `s->gen_insn_end_off[num_insns] == off' failed.

  I am able to reproduce the issue reliably, which is encouraging. The
  full QEMU command line is:

  qemu-system-aarch64 -kernel kernel-5.0.0cbl1 -append "root=/dev/vda1
  ro init=/sbin/init console=ttyAMA0" -name guest=cbl -drive
  file=cbl.qcow2,index=0,media=disk,format=qcow2 -drive
  file=swap.qcow2,index=1,media=disk,format=qcow2 -machine virt -cpu
  cortex-a57 -smp 4,sockets=1,cores=2,threads=2 -m size=8192 -netdev
  tap,id=network0,ifname=tapcbl2,script=no,downscript=no -device virtio-
  net-device,netdev=network0,mac=aa:bb:cc:dd:ee:02 -nographic

  The specific GCC test that causes QEMU to crash is vldX.c run from
  advsimd-intrinsics.exp; I can reproduce via "make check-gcc
  RUNTESTFLAGS=advsimd-intrinsics.exp=vldX.c"

  If there is anything I can do to further triage the issue, or gain
  more insight into what is going on, please let me know! I am eager to
  help however I can.

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