Re: [Qemu-devel] qemu-fast 0.6.0 hanging... [follow up in case this email got lost...]

[Damien Mascord <tusker@tusker.org>]

Damien Mascord wrote:
> Damien Mascord wrote:
> 
>> Hi,
>>
>> I am trying to get qemu 0.6.0 running on Debian testing, running 
>> vanilla 2.4.26 kernel.

Ok, further debugging using strace this time reveals something funny...

As you can see at the end, we have hit a loop, about 24 SIGSEGV, then 
one SIGIO, then about 24 SIGSEGV ad finitum.

It won't stop until a kill is issued.

Damien

--- SIGSEGV (Segmentation fault) @ 0 (0) ---
rt_sigprocmask(SIG_SETMASK, [RTMIN], NULL, 8) = 0
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
rt_sigprocmask(SIG_SETMASK, [RTMIN], NULL, 8) = 0
.
.
.
--- SIGIO (I/O possible) @ 0 (0) ---
times({tms_utime=1, tms_stime=2, tms_cutime=0, tms_cstime=0}) = 103937920
sigreturn()                             = ? (mask now [RTMIN])
.
.
.


-------------------------------------


open("/etc/localtime", O_RDONLY)        = 7
fstat64(7, {st_mode=S_IFREG|0644, st_size=152, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 
-1, 0) = 0x40000000
read(7, "TZif\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\7\0\0\0\7\0"..., 
4096) = 152
close(7)                                = 0
munmap(0x40000000, 4096)                = 0
old_mmap(0xab076000, 8192, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xab076000
old_mmap(0xab078000, 8192, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xab078000
old_mmap(0xab07a000, 8192, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xab07a000
times({tms_utime=1, tms_stime=1, tms_cutime=0, tms_cstime=0}) = 103937919
ioctl(0, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo 
...}) = 0
fcntl64(0, F_GETFL)                     = 0x8002 (flags O_RDWR|O_LARGEFILE)
ioctl(0, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo 
...}) = 0
ioctl(0, SNDCTL_TMR_START or TCSETS, {B38400 opost -isig -icanon -echo 
...}) = 0
ioctl(0, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost -isig -icanon 
-echo ...}) = 0
fcntl64(0, F_SETFL, O_RDONLY|O_NONBLOCK) = 0
old_mmap(0xab07c000, 16384, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xab07c000
old_mmap(0xab080000, 16384, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xab080000
mprotect(0xfe000, 4096, PROT_READ)      = -1 ENOMEM (Cannot allocate memory)
old_mmap(0xab084000, 16384, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xab084000
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
old_mmap(0xab088000, 16384, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xab088000
old_mmap(NULL, 4096, PROT_READ, MAP_SHARED|MAP_FIXED, 4, 0) = 0
rt_sigreturn(0)                         = 0
--- SIGIO (I/O possible) @ 0 (0) ---
times({tms_utime=1, tms_stime=1, tms_cutime=0, tms_cstime=0}) = 103937919
sigreturn()                             = ? (mask now [RTMIN])
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
mprotect(0, 4096, PROT_READ|PROT_WRITE) = 0
rt_sigreturn(0)                         = 0
poll([{fd=0, events=POLLIN}], 1, 0)     = 0
select(0, [], [], [], {0, 0})           = 0 (Timeout)
gettimeofday({1090320144, 481225}, NULL) = 0
times({tms_utime=1, tms_stime=1, tms_cutime=0, tms_cstime=0}) = 103937919
times({tms_utime=1, tms_stime=1, tms_cutime=0, tms_cstime=0}) = 103937919
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
old_mmap(0xf000, 4096, PROT_READ, MAP_SHARED|MAP_FIXED, 4, 0xf000) = 0xf000
rt_sigreturn(0xe0ad)                    = 0
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
mprotect(0xf000, 4096, PROT_READ|PROT_WRITE) = 0
rt_sigreturn(0xe0ad)                    = 0
mprotect(0xf0000, 4096, PROT_READ)      = -1 ENOMEM (Cannot allocate memory)
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
old_mmap(0xfd000, 4096, PROT_READ, MAP_SHARED|MAP_FIXED, 4, 0x840d000) = 
0xfd000
rt_sigreturn(0xda73)                    = 983040
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
old_mmap(0xf0000, 4096, PROT_READ, MAP_SHARED|MAP_FIXED, 4, 0x8400000) = 
0xf0000
rt_sigreturn(0x168)                     = 983040
mprotect(0xf9000, 4096, PROT_READ)      = -1 ENOMEM (Cannot allocate memory)
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
old_mmap(0x9f000, 4096, PROT_READ, MAP_SHARED|MAP_FIXED, 4, 0x9f000) = 
0x9f000
rt_sigreturn(0x1)                       = 654336
--- SIGIO (I/O possible) @ 0 (0) ---
times({tms_utime=1, tms_stime=1, tms_cutime=0, tms_cstime=0}) = 103937919
sigreturn()                             = ? (mask now [RTMIN])
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
mprotect(0x9f000, 4096, PROT_READ|PROT_WRITE) = 0
rt_sigreturn(0x1)                       = 654336
--- SIGIO (I/O possible) @ 0 (0) ---
times({tms_utime=1, tms_stime=1, tms_cutime=0, tms_cstime=0}) = 103937919
sigreturn()                             = ? (mask now [RTMIN])
--- SIGIO (I/O possible) @ 0 (0) ---
times({tms_utime=1, tms_stime=1, tms_cutime=0, tms_cstime=0}) = 103937919
sigreturn()                             = ? (mask now [RTMIN])
--- SIGIO (I/O possible) @ 0 (0) ---
times({tms_utime=1, tms_stime=1, tms_cutime=0, tms_cstime=0}) = 103937919
sigreturn()                             = ? (mask now [RTMIN])
--- SIGIO (I/O possible) @ 0 (0) ---
times({tms_utime=1, tms_stime=1, tms_cutime=0, tms_cstime=0}) = 103937919
sigreturn()                             = ? (mask now [RTMIN])
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
old_mmap(0xc0000, 4096, PROT_READ, MAP_SHARED|MAP_FIXED, 4, 0x8440000) = 
0xc0000
rt_sigreturn(0x4)                       = 786432
mprotect(0xc0000, 4096, PROT_READ)      = 0
mprotect(0xc3000, 4096, PROT_READ)      = -1 ENOMEM (Cannot allocate memory)
mprotect(0xc6000, 4096, PROT_READ)      = -1 ENOMEM (Cannot allocate memory)
--- SIGIO (I/O possible) @ 0 (0) ---
times({tms_utime=1, tms_stime=1, tms_cutime=0, tms_cstime=0}) = 103937919
sigreturn()                             = ? (mask now [RTMIN])
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
old_mmap(0xc3000, 4096, PROT_READ, MAP_SHARED|MAP_FIXED, 4, 0x8443000) = 
0xc3000
rt_sigreturn(0x321d)                    = 786432
mprotect(0xc7000, 4096, PROT_READ)      = -1 ENOMEM (Cannot allocate memory)
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
old_mmap(0xc3000, 4096, PROT_READ, MAP_SHARED|MAP_FIXED, 4, 0x8443000) = 
0xc3000
rt_sigreturn(0x321d)                    = 786432
mprotect(0xc7000, 4096, PROT_READ)      = -1 ENOMEM (Cannot allocate memory)
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
old_mmap(0xc6000, 4096, PROT_READ, MAP_SHARED|MAP_FIXED, 4, 0x8446000) = 
0xc6000
rt_sigreturn(0x6fb1)                    = 0
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
old_mmap(0xc7000, 4096, PROT_READ, MAP_SHARED|MAP_FIXED, 4, 0x8447000) = 
0xc7000
rt_sigreturn(0x7019)                    = 2418
mprotect(0xc5000, 4096, PROT_READ)      = -1 ENOMEM (Cannot allocate memory)
--- SIGIO (I/O possible) @ 0 (0) ---
times({tms_utime=1, tms_stime=1, tms_cutime=0, tms_cstime=0}) = 103937919
sigreturn()                             = ? (mask now [RTMIN])
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
rt_sigprocmask(SIG_SETMASK, [RTMIN], NULL, 8) = 0
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
rt_sigprocmask(SIG_SETMASK, [RTMIN], NULL, 8) = 0
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
rt_sigprocmask(SIG_SETMASK, [RTMIN], NULL, 8) = 0




-- 
Damien Mascord (tusker at tusker dot org)
GPG key 2CB181BE / 93B2 EF21 0C7C F022 F467  7966 219E 92B3 2CB1 81BE