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Re: [libvirt] [Bug] [vbox-driver] attach-device



>[...]we'd need to know what XML string
> you are passing to attach-device

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<device>
<disk device="cdrom" type="file">
<source file="/tmp/foo.iso"/>
<target dev="hdc"/>
<readonly/>
</disk>
</device>

If I run it without the first line, I get an "unexptected error".

> and you might also want to run things
> through valgrind to see if we really are smashing the heap in your
> particular case.

I'm new to valgrind so hopefully this output is helpfull for you:

==2735== Memcheck, a memory error detector
==2735== Copyright (C) 2002-2010, and GNU GPL'd, by Julian Seward et al.
==2735== Using Valgrind-3.6.1 and LibVEX; rerun with -h for copyright info
==2735== Command: virsh
==2735== 
==2735== Conditional jump or move depends on uninitialised value(s)
==2735==    at 0x5E8D27B: __GI___strcasecmp_l (strcmp.S:243)
==2735==    by 0x5E2CE2C: __gconv_open (gconv_open.c:70)
==2735==    by 0x5E39EB6: _nl_find_msg (dcigettext.c:990)
==2735==    by 0x5E3A673: __dcigettext (dcigettext.c:654)
==2735==    by 0x42FA32: main (virsh.c:19291)
==2735== 
==2735== Use of uninitialised value of size 8
==2735==    at 0x5E8F3B4: __GI___strcasecmp_l (strcmp.S:2257)
==2735==    by 0x5E2CE2C: __gconv_open (gconv_open.c:70)
==2735==    by 0x5E39EB6: _nl_find_msg (dcigettext.c:990)
==2735==    by 0x5E3A673: __dcigettext (dcigettext.c:654)
==2735==    by 0x42FA32: main (virsh.c:19291)
==2735== 
==2735== Use of uninitialised value of size 8
==2735==    at 0x5E8F3B8: __GI___strcasecmp_l (strcmp.S:2258)
==2735==    by 0x5E2CE2C: __gconv_open (gconv_open.c:70)
==2735==    by 0x5E39EB6: _nl_find_msg (dcigettext.c:990)
==2735==    by 0x5E3A673: __dcigettext (dcigettext.c:654)
==2735==    by 0x42FA32: main (virsh.c:19291)
==2735== 
[...]
virsh # attach-device dos /tmp/bla.xml
Fehler: Fehler beim Anhängen des Geräts von /tmp/bla.xml
Fehler: zu wenig Arbeitsspeicher
[...]
==2735== 
==2735== HEAP SUMMARY:
==2735==     in use at exit: 191,210 bytes in 1,495 blocks
==2735==   total heap usage: 3,907 allocs, 2,412 frees, 1,390,037 bytes allocated
==2735== 
==2735== LEAK SUMMARY:
==2735==    definitely lost: 60 bytes in 1 blocks
==2735==    indirectly lost: 240 bytes in 10 blocks
==2735==      possibly lost: 701 bytes in 26 blocks
==2735==    still reachable: 190,209 bytes in 1,458 blocks
==2735==         suppressed: 0 bytes in 0 blocks
[...]
==2735== ERROR SUMMARY: 6 errors from 3 contexts (suppressed: 73 from 7)


Also I used gdb to see where the virAlloc() which fails is called:

Breakpoint 1, virAlloc (ptrptr=0x7fffffffd960, size=776) at util/memory.c:93
93	{
(gdb) bt
#0  virAlloc (ptrptr=0x7fffffffd960, size=776) at util/memory.c:93
#1  0x00007ffff7b37d73 in vboxDomainAttachDeviceImpl (dom=0x6bcc80, 
    xml=0x6c8f50 "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n<device>\n<disk device=\"cdrom\" type=\"file\">\n<source file=\"/tmp/foo.iso\"/>\n<target dev=\"hdc\"/>\n<readonly/>\n</disk>\n</device>\n", mediaChangeOnly=<optimized out>) at vbox/vbox_tmpl.c:5339
#2  0x00007ffff7a5dc10 in virDomainAttachDevice (domain=0x6bcc80, 
    xml=0x6c8f50 "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n<device>\n<disk device=\"cdrom\" type=\"file\">\n<source file=\"/tmp/foo.iso\"/>\n<target dev=\"hdc\"/>\n<readonly/>\n</disk>\n</device>\n") at libvirt.c:9172
#3  0x000000000041aea5 in cmdAttachDevice (ctl=0x7fffffffdd20, cmd=0x6c8c50) at virsh.c:13144
#4  0x00000000004118e5 in vshCommandRun (ctl=0x7fffffffdd20, cmd=0x6c8c50) at virsh.c:17710
#5  0x000000000042f9a8 in main (argc=<optimized out>, argv=<optimized out>) at virsh.c:19315
(gdb) n
101	    *(void **)ptrptr = calloc(1, size);
(gdb) n
103	        return -1;


I'm using the current version from git (5452e88).

Hope the informations are useful this time.

Thanks in advance !
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