qemu-system-riscv64 error, Could not allocate dynamic translator buffer

[Dinesh Thirumurthy <dinesh.thirumurthy%gmail.com@localhost>]

Hi,

This qemu command runs on FreeBSD and OpenBSD.

qemu-system-riscv64 -machine spike_v1.10 -kernel bbl -nographic

On a 2GB RAM NetBSD 8.0/amd64 VM on VirtualBox 5.1.38 running on
Ubuntu 16.04.5 LTS

bash-4.4# ktruss /usr/pkg/bin/qemu-system-riscv64 -machine spike_v1.10
-kernel bbl -nographic > e
Could not allocate dynamic translator buffer
bash-4.4# ktruss /usr/pkg/bin/qemu-system-riscv64 -machine spike_v1.10
-kernel bbl -nographic > ktruss.err
Could not allocate dynamic translator buffer
bash-4.4# ktrace /usr/pkg/bin/qemu-system-riscv64 -machine spike_v1.10
-kernel bbl -nographic
Could not allocate dynamic translator buffer
bash-4.4# kdump ktrace.out > kdump.out
bash-4.4# uname -a
NetBSD localhost 8.0 NetBSD 8.0 (GENERIC) #0: Tue Jul 17 14:59:51 UTC
2018  mkrepro%mkrepro.NetBSD.org@localhost:/usr/src/sys/arch/amd64/compile/GENERIC
amd64
bash-4.4# vmstat
 procs    memory      page                       disks   faults      cpu
 r b      avm    fre  flt  re  pi   po   fr   sr w0 c0   in   sy  cs us sy id
 0 0    88936 1883472 208   0   0    0    0    0 13  0   16  549  66  1  1 98
bash-4.4# ulimit -a
time          (-t seconds    ) unlimited
file          (-f blocks     ) unlimited
data          (-d kbytes     ) 262144
stack         (-s kbytes     ) 4096
coredump      (-c blocks     ) unlimited
memory        (-m kbytes     ) 2010852
locked memory (-l kbytes     ) 670284
thread        (-r threads    ) 1024
process       (-p processes  ) 1024
nofiles       (-n descriptors) 1024
vmemory       (-v kbytes     ) unlimited
sbsize        (-b bytes      ) unlimited
#

The complete log of ktrace+kdump and ktruss are at

https://github.com/hakrdinesh/e/blob/master/nb/ktruss.out

and

https://github.com/hakrdinesh/e/blob/master/nb/kdump.out

ktruss reports ...

   725      1 qemu-system-risc mmap(0, 0x1000, 0x3, 0x1002,
0xffffffff, 0, 0) = 0x7421f67ea000
   725      1 qemu-system-risc access("/usr/pkg/share/qemu", 0x4) = 0
   725      1 qemu-system-risc mmap(0, 0x7000, 0x3, 0x1002,
0xffffffff, 0, 0) = 0x7421f67e3000
   725      1 qemu-system-risc mmap(0, 0x7000, 0x3, 0x1002,
0xffffffff, 0, 0) = 0x7421f67dc000
   725      1 qemu-system-risc mmap(0, 0x81000, 0x3, 0x1002,
0xffffffff, 0, 0) = 0x7421f675b000
   725      1 qemu-system-risc mmap(0, 0x2000000, 0x7, 0x1002,
0xffffffff, 0, 0) Err#13 EACCES
   725      1 qemu-system-risc write(0x2, 0x7421f67f3000, 0x2d) = 45
"Could not allocate dynamic translator buffer\n"

kdump reports ...

107      1 qemu-system-risc CALL  access(0x7b80e5ed6c80,4)
   107      1 qemu-system-risc NAMI  "/usr/pkg/share/qemu"
   107      1 qemu-system-risc RET   access 0
   107      1 qemu-system-risc CALL
mmap(0,0x7000,PROT_READ|PROT_WRITE,0x1002<PRIVATE,ANONYMOUS,ALIGN=NONE>,0xffffffff,0,0)
   107      1 qemu-system-risc RET   mmap 135793543385088/0x7b80e5ea9000
   107      1 qemu-system-risc CALL
mmap(0,0x7000,PROT_READ|PROT_WRITE,0x1002<PRIVATE,ANONYMOUS,ALIGN=NONE>,0xffffffff,0,0)
   107      1 qemu-system-risc RET   mmap 135793543356416/0x7b80e5ea2000
   107      1 qemu-system-risc CALL
mmap(0,0x81000,PROT_READ|PROT_WRITE,0x1002<PRIVATE,ANONYMOUS,ALIGN=NONE>,0xffffffff,0,0)
   107      1 qemu-system-risc RET   mmap 135793542828032/0x7b80e5e21000
   107      1 qemu-system-risc CALL
mmap(0,0x2000000,PROT_READ|PROT_WRITE|PROT_EXEC,0x1002<PRIVATE,ANONYMOUS,ALIGN=NONE>,0xffffffff,0,0)
   107      1 qemu-system-risc RET   mmap -1 errno 13 Permission denied
   107      1 qemu-system-risc CALL  write(2,0x7b80e5eb9000,0x2d)
   107      1 qemu-system-risc GIO   fd 2 wrote 45 bytes
"Could not allocate dynamic translator buffer\n"

How would I fix this?

Thank.
Regards,
Dinesh