Re: [PATCH v3 00/74] qom: Automated conversion of type checking boilerplate

[Eduardo Habkost]

On Wed, Aug 26, 2020 at 01:22:38PM +0300, Roman Bolshakov wrote:
> On Tue, Aug 25, 2020 at 03:19:56PM -0400, Eduardo Habkost wrote:
> > git tree for this series:
> > https://github.com/ehabkost/qemu-hacks/tree/work/qom-macros-autoconvert
> > 
> 
> Hi Eduardo,
> 
> another assert fires during QEMU start:
> 
> $ lldb -- $QEMU -cpu nahelem -M q35,accel=hvf -cdrom test.iso
> (lldb) target create "[...]/qemu/build/qemu-system-x86_64"
> Current executable set to '[...]/qemu/build/qemu-system-x86_64' (x86_64).
> (lldb) settings set -- target.run-args  "-cpu" "nahelem" "-M" "q35,accel=hvf" 
> "-cdrom" "test.iso"
> (lldb) r
> Process 92411 launched: '[...]/qemu/build/qemu-system-x86_64' (x86_64)
> **
> ERROR:../qom/object.c:505:object_initialize_with_type: assertion failed: 
> (size >= type->instance_size)
> Bail out! ERROR:../qom/object.c:505:object_initialize_with_type: assertion 
> failed: (size >= type->instance_size)
> Process 92411 stopped
> * thread #3, stop reason = signal SIGABRT
>     frame #0: 0x00007fff6a75e33a libsystem_kernel.dylib`__pthread_kill + 10
> libsystem_kernel.dylib`__pthread_kill:
> ->  0x7fff6a75e33a <+10>: jae    0x7fff6a75e344            ; <+20>
>     0x7fff6a75e33c <+12>: movq   %rax, %rdi
>     0x7fff6a75e33f <+15>: jmp    0x7fff6a758629            ; cerror_nocancel
>     0x7fff6a75e344 <+20>: retq
> Target 0: (qemu-system-x86_64) stopped.
> (lldb) bt
> * thread #3, stop reason = signal SIGABRT
>   * frame #0: 0x00007fff6a75e33a libsystem_kernel.dylib`__pthread_kill + 10
>     frame #1: 0x00007fff6a81ae60 libsystem_pthread.dylib`pthread_kill + 430
>     frame #2: 0x00007fff6a6e5808 libsystem_c.dylib`abort + 120
>     frame #3: 0x0000000101314c36 libglib-2.0.0.dylib`g_assertion_message + 406
>     frame #4: 0x0000000101314c9e libglib-2.0.0.dylib`g_assertion_message_expr 
> + 94
>     frame #5: 0x0000000100366f0c 
> qemu-system-x86_64`object_initialize_with_type(obj=<unavailable>, 
> size=<unavailable>, type=<unavailable>) at object.c:505:5 [opt]
>     frame #6: 0x0000000100400e48 
> qemu-system-x86_64`qbus_create_inplace(bus=0x0000000000000000, 
> size=<unavailable>, typename=<unavailable>, parent=0x0000000000000000, 
> name="main-system-bus") at bus.c:153:5 [opt]
>     frame #7: 0x000000010006800a qemu-system-x86_64`sysbus_get_default 
> [inlined] main_system_bus_create at sysbus.c:346:5 [opt]
>     frame #8: 0x0000000100067fe2 qemu-system-x86_64`sysbus_get_default at 
> sysbus.c:354 [opt]
>     frame #9: 0x00000001002b774f 
> qemu-system-x86_64`qemu_init(argc=<unavailable>, argv=<unavailable>, 
> envp=<unavailable>) at vl.c:3890:41 [opt]
>     frame #10: 0x0000000100008c99 
> qemu-system-x86_64`qemu_main(argc=<unavailable>, argv=<unavailable>, 
> envp=<unavailable>) at main.c:49:5 [opt]
>     frame #11: 0x000000010007bbd6 
> qemu-system-x86_64`call_qemu_main(opaque=<unavailable>) at cocoa.m:1710:14 
> [opt]
>     frame #12: 0x00000001004631ee 
> qemu-system-x86_64`qemu_thread_start(args=<unavailable>) at 
> qemu-thread-posix.c:521:9 [opt]
>     frame #13: 0x00007fff6a81b109 libsystem_pthread.dylib`_pthread_start + 148
>     frame #14: 0x00007fff6a816b8b libsystem_pthread.dylib`thread_start + 15
> (lldb) f 7
> qemu-system-x86_64 was compiled with optimization - stepping may behave 
> oddly; variables may not be available.
> frame #7: 0x000000010006800a qemu-system-x86_64`sysbus_get_default [inlined] 
> main_system_bus_create at sysbus.c:346:5 [opt]
>    343      /* assign main_system_bus before qbus_create_inplace()
>    344       * in order to make "if (bus != sysbus_get_default())" work */
>    345      main_system_bus = g_malloc0(system_bus_info.instance_size);
> -> 346      qbus_create_inplace(main_system_bus, 
> system_bus_info.instance_size,
>    347                          TYPE_SYSTEM_BUS, NULL, "main-system-bus");
>    348      OBJECT(main_system_bus)->free = g_free;
>    349  }
> (lldb) f 6
> frame #6: 0x0000000100400e48 
> qemu-system-x86_64`qbus_create_inplace(bus=0x0000000000000000, 
> size=<unavailable>, typename=<unavailable>, parent=0x0000000000000000, 
> name="main-system-bus") at bus.c:153:5 [opt]
>    150  void qbus_create_inplace(void *bus, size_t size, const char *typename,
>    151                           DeviceState *parent, const char *name)
>    152  {
> -> 153      object_initialize(bus, size, typename);
>    154      qbus_init(bus, parent, name);
>    155  }
>    156
> (lldb) f 5
> frame #5: 0x0000000100366f0c 
> qemu-system-x86_64`object_initialize_with_type(obj=<unavailable>, 
> size=<unavailable>, type=<unavailable>) at object.c:505:5 [opt]
>    502
>    503      g_assert(type->instance_size >= sizeof(Object));
>    504      g_assert(type->abstract == false);
> -> 505      g_assert(size >= type->instance_size);
>    506
>    507      memset(obj, 0, type->instance_size);
>    508      obj->class = type->class;

Oops, sorry for not catching this before submitting.  This is
caused by patch 72/74, which is not really important right now.
I will drop it from the series by now.

I've pushed the new tree to
https://github.com/ehabkost/qemu-hacks/tree/work/qom-macros-autoconvert

-- 
Eduardo