[Bug 1818937] Re: Crash with HV_ERROR on macOS host

[Roman Bolshakov]

I'm not exactly sure what commit improved the situation (either
https://git.qemu.org/?p=qemu.git;a=commit;h=e37aa8b0e410 or
https://git.qemu.org/?p=qemu.git;a=commit;h=fbafbb6db7742)  but I have
noticed that sporadic failures are gone after the series was applied:
https://lists.gnu.org/archive/html/qemu-devel/2019-11/msg03977.html

** Changed in: qemu
       Status: New => Fix Released

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Title:
  Crash with HV_ERROR on macOS host

Status in QEMU:
  Fix Released

Bug description:
  On macOS host running Windows 10 guest, qemu crashed with error
  message: Error: HV_ERROR.

  Host: macOS Mojave 10.14.3 (18D109) Late 2014 Mac mini presumably Core i5 
4278U.
  QEMU: git commit a3e3b0a7bd5de211a62cdf2d6c12b96d3c403560
  QEMU parameter: qemu-system-x86_64 -m 3000 -drive 
file=disk.img,if=virtio,discard=unmap -accel hvf -soundhw hda -smp 3

  thread list
  Process 56054 stopped
    thread #1: tid = 0x2ffec8, 0x00007fff48d0805a vImage`vLookupTable_Planar16 
+ 970, queue = 'com.apple.main-thread'
    thread #2: tid = 0x2ffecc, 0x00007fff79d6d7de 
libsystem_kernel.dylib`__psynch_cvwait + 10
    thread #3: tid = 0x2ffecd, 0x00007fff79d715aa 
libsystem_kernel.dylib`__select + 10
    thread #4: tid = 0x2ffece, 0x00007fff79d71d9a 
libsystem_kernel.dylib`__sigwait + 10
  * thread #6: tid = 0x2ffed0, 0x00007fff79d7023e 
libsystem_kernel.dylib`__pthread_kill + 10, stop reason = signal SIGABRT
    thread #7: tid = 0x2ffed1, 0x00007fff79d6d7de 
libsystem_kernel.dylib`__psynch_cvwait + 10
    thread #8: tid = 0x2ffed2, 0x00007fff79d6d7de 
libsystem_kernel.dylib`__psynch_cvwait + 10
    thread #11: tid = 0x2fff34, 0x00007fff79d6a17a 
libsystem_kernel.dylib`mach_msg_trap + 10, name = 'com.apple.NSEventThread'
    thread #30: tid = 0x300c04, 0x00007fff79e233f8 
libsystem_pthread.dylib`start_wqthread
    thread #31: tid = 0x300c16, 0x00007fff79e233f8 
libsystem_pthread.dylib`start_wqthread
    thread #32: tid = 0x300c17, 0x0000000000000000
    thread #33: tid = 0x300c93, 0x00007fff79d6d7de 
libsystem_kernel.dylib`__psynch_cvwait + 10

  
  Crashed thread:

  * thread #6, stop reason = signal SIGABRT
    * frame #0: 0x00007fff79d7023e libsystem_kernel.dylib`__pthread_kill + 10
      frame #1: 0x00007fff79e26c1c libsystem_pthread.dylib`pthread_kill + 285
      frame #2: 0x00007fff79cd91c9 libsystem_c.dylib`abort + 127
      frame #3: 0x000000010baa476d 
qemu-system-x86_64`assert_hvf_ok(ret=<unavailable>) at hvf.c:106 [opt]
      frame #4: 0x000000010baa4c8f 
qemu-system-x86_64`hvf_vcpu_exec(cpu=0x00007f8e5283de00) at hvf.c:681 [opt]
      frame #5: 0x000000010b988423 
qemu-system-x86_64`qemu_hvf_cpu_thread_fn(arg=0x00007f8e5283de00) at 
cpus.c:1636 [opt]
      frame #6: 0x000000010bd9dfce 
qemu-system-x86_64`qemu_thread_start(args=<unavailable>) at 
qemu-thread-posix.c:502 [opt]
      frame #7: 0x00007fff79e24305 libsystem_pthread.dylib`_pthread_body + 126
      frame #8: 0x00007fff79e2726f libsystem_pthread.dylib`_pthread_start + 70
      frame #9: 0x00007fff79e23415 libsystem_pthread.dylib`thread_start + 13

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