Re: [Qemu-devel] Re: Re: Nothing happens

[Struan Bartlett <struan@praguespringpeople.org>]

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I'm at a bit of a loss to explain this. My strace output is quite 
different. I'm running the 2005-05-18 snapshot of qemu 0.7.0.

I think it's time to start inserting fprintf(stderr, "OK1\n"); 
statements into your code, recompiling, to trace the error origin (or 
use gdb).

In detail...

Yours:

$ grep ^open /tmp/qemu.log
open("/etc/ld.so.cache", O_RDONLY)      = 3
open("/lib/libdl.so.2", O_RDONLY)       = 3
open("/lib/libc.so.6", O_RDONLY)        = 3
open("/dev/urandom", O_RDONLY)          = 3
open("/dev/tty", O_RDWR|O_NONBLOCK)     = 3
open("/etc/mtab", O_RDONLY)             = 3
open("/proc/meminfo", O_RDONLY)         = 3
open("./run", O_RDONLY)                 = 3

Mine:

$ grep ^open /tmp/q.log
open("/etc/ld.so.preload", O_RDONLY)    = -1 ENOENT (No such file or 
directory)
open("/etc/ld.so.cache", O_RDONLY)      = 3
open("/lib/tls/libm.so.6", O_RDONLY)    = 3
open("/usr/lib/libz.so.1", O_RDONLY)    = 3
open("/usr/lib/libSDL-1.2.so.0", O_RDONLY) = 3
open("/lib/tls/libpthread.so.0", O_RDONLY) = 3
open("/lib/tls/libutil.so.1", O_RDONLY) = 3
open("/lib/tls/libc.so.6", O_RDONLY)    = 3
open("/usr/X11R6/lib/libX11.so.6", O_RDONLY) = 3
open("/usr/X11R6/lib/libXext.so.6", O_RDONLY) = 3
open("/usr/lib/libasound.so.2", O_RDONLY) = 3
open("/lib/tls/libdl.so.2", O_RDONLY)   = 3
open("/dev/net/tun", O_RDWR|O_LARGEFILE) = 3
open("/dev/shm/qemuybaeub", O_RDWR|O_CREAT|O_EXCL|O_LARGEFILE, 0600) = 4
open("/dev/shm/qemuybaeub", O_RDWR|O_CREAT|O_TRUNC|O_LARGEFILE, 0600) = 5
open("c.img", O_RDONLY|O_LARGEFILE)     = 6
open("c.img", O_RDWR|O_LARGEFILE)       = 6
open("/dev/kqemu", O_RDWR|O_LARGEFILE)  = 7
open("/home/struan/.Xauthority", O_RDONLY) = 9
open("/home/struan/.Xauthority", O_RDONLY) = 9
open("/home/struan/.Xauthority", O_RDONLY) = 10
open("/etc/ld.so.cache", O_RDONLY)      = 10
open("/usr/lib/libXcursor.so.1", O_RDONLY) = 10
open("/usr/lib/libXrender.so.1", O_RDONLY) = 10
open("/usr/X11R6/lib/X11/locale/locale.alias", O_RDONLY) = 10
open("/usr/X11R6/lib/X11/locale/locale.dir", O_RDONLY) = 10
open("/usr/X11R6/lib/X11/locale/C/XI18N_OBJS", O_RDONLY) = 10
open("/usr/X11R6/lib/X11/locale/lib/common/xlcDef.so.2", O_RDONLY) = 10
open("/usr/X11R6/lib/X11/locale/locale.alias", O_RDONLY) = 10
open("/usr/X11R6/lib/X11/locale/locale.dir", O_RDONLY) = 10
open("/usr/X11R6/lib/X11/locale/C/XLC_LOCALE", O_RDONLY) = 10
open("/home/struan/.Xdefaults-xebedee", O_RDONLY) = -1 ENOENT (No such 
file or directory)
open("/proc/stat", O_RDONLY)            = 10
open("/usr/local/share/qemu/bios.bin", O_RDONLY|O_LARGEFILE) = 10
open("/usr/local/share/qemu/bios.bin", O_RDONLY|O_LARGEFILE) = 10
open("/usr/local/share/qemu/vgabios-cirrus.bin", O_RDONLY|O_LARGEFILE) = 10
open("/etc/localtime", O_RDONLY)        = 10


Rudi Lippert wrote:

>well, nothing really means nothing. the guest window does not come up, and
>the console window does not show anything, even with -monitor stdio. the
>thread just goes to sleep.
>strace may be interesting, and 5kb are not too much, i think, so here it
>comes.
>thanks for now,
>
>Rudi
>
>
>Struan Bartlett wrote:
>
>  
>
>>How do you mean 'nothing'? Can you be more precise?
>>
>>Does it display the network interface configuration? open the guest
>>window? Or really is does it just hang immediately? With the '-monitor
>>stdio' option does it give you a monitor prompt?
>>
>>Have you tried running qemu with:
>>
>>strace qemu <your normal options> 2>/tmp/qemu.log
>>
>>On Wed, 18 May 2005, Rudi Lippert wrote:
>>
>>    
>>
>>>My OS:
>>>GNU/Linux (Gentoo)
>>>QEMU Version:
>>>0.7.0, compiled using the standard ebuild; no kqemu or qvm86
>>>I'd include the exact build options, but they're rather lengthy.
>>>
>>>I've experienced the same problem with 0.6.1 and CVS somewhere in between
>>>0.6.1 and 0.7.0.
>>>
>>>Cheers,
>>>Rudi
>>>
>>>Hetz Ben Hamo wrote:
>>>
>>>      
>>>
>>>>How about starting with trivial details such as:
>>>>
>>>>* Which host OS do you use?
>>>>* Which QEMU version?
>>>>* binaries downloaded or did you compile it?
>>>>
>>>>Thanks,
>>>>Hetz
>>>>
>>>>On 5/18/05, Rudi Lippert <Rudi@lyrikpage.de> wrote:
>>>>        
>>>>
>>>>>Hi!
>>>>>I keep wondering why QEMU does not do anything when I start it.
>>>>>First of all: yes, I know how to use QEMU. When I use it on my other
>>>>>PC, it works like a charm.
>>>>>The major difference between the two systems is, that this one is an
>>>>>AMD64. And here is what happens when I start QEMU:
>>>>>Nothing. No output, no CPU activity.
>>>>>I know that this is not a whole lot of information, but I will provide
>>>>>any further information that is requested.
>>>>>Thanks in advance!
>>>>>
>>>>>Rudi Lippert (Herzogenaurach, Germany)
>>>>>
>>>>>          
>>>>>
>>>>>------------------------------------------------------------------------
>>>>>
>>>>>execve("./run", ["./run", "-monitor", "stdio"], [/* 57 vars */]) = 0
>>>>>uname({sys="Linux", node="rudi", ...})  = 0
>>>>>brk(0)                                  = 0x5ba000
>>>>>mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2a9556b000
>>>>>access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
>>>>>open("/etc/ld.so.cache", O_RDONLY)      = 3
>>>>>fstat(3, {st_mode=S_IFREG|0644, st_size=100748, ...}) = 0
>>>>>mmap(NULL, 100748, PROT_READ, MAP_PRIVATE, 3, 0) = 0x2a9556c000
>>>>>close(3)                                = 0
>>>>>open("/lib/libdl.so.2", O_RDONLY)       = 3
>>>>>read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\340\17\0"..., 640) = 640
>>>>>lseek(3, 624, SEEK_SET)                 = 624
>>>>>read(3, "\4\0\0\0\20\0\0\0\1\0\0\0GNU\0\0\0\0\0\2\0\0\0\4\0\0\0"..., 32) = 32
>>>>>fstat(3, {st_mode=S_IFREG|0755, st_size=11480, ...}) = 0
>>>>>mmap(NULL, 1056984, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x2a9566c000
>>>>>mprotect(0x2a9566e000, 1048792, PROT_NONE) = 0
>>>>>mmap(0x2a9576c000, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0) = 0x2a9576c000
>>>>>close(3)                                = 0
>>>>>open("/lib/libc.so.6", O_RDONLY)        = 3
>>>>>read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\260\316"..., 640) = 640
>>>>>lseek(3, 624, SEEK_SET)                 = 624
>>>>>read(3, "\4\0\0\0\20\0\0\0\1\0\0\0GNU\0\0\0\0\0\2\0\0\0\4\0\0\0"..., 32) = 32
>>>>>fstat(3, {st_mode=S_IFREG|0755, st_size=1270528, ...}) = 0
>>>>>mmap(NULL, 2250248, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x2a9576f000
>>>>>mprotect(0x2a9588b000, 1086984, PROT_NONE) = 0
>>>>>mmap(0x2a9596f000, 135168, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x100000) = 0x2a9596f000
>>>>>mmap(0x2a95990000, 17928, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x2a95990000
>>>>>close(3)                                = 0
>>>>>mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2a95995000
>>>>>mprotect(0x2a9598a000, 12288, PROT_READ) = 0
>>>>>munmap(0x2a9556c000, 100748)            = 0
>>>>>open("/dev/urandom", O_RDONLY)          = 3
>>>>>read(3, "\211\377\260-\276\3508\247", 8) = 8
>>>>>close(3)                                = 0
>>>>>rt_sigprocmask(SIG_BLOCK, NULL, [RTMIN], 8) = 0
>>>>>open("/dev/tty", O_RDWR|O_NONBLOCK)     = 3
>>>>>close(3)                                = 0
>>>>>brk(0)                                  = 0x5ba000
>>>>>brk(0x5db000)                           = 0x5db000
>>>>>getuid()                                = 1000
>>>>>getgid()                                = 100
>>>>>geteuid()                               = 1000
>>>>>getegid()                               = 100
>>>>>rt_sigprocmask(SIG_BLOCK, NULL, [RTMIN], 8) = 0
>>>>>open("/etc/mtab", O_RDONLY)             = 3
>>>>>fstat(3, {st_mode=S_IFREG|0644, st_size=694, ...}) = 0
>>>>>mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2a9556c000
>>>>>read(3, "/dev/hdc3 / ext3 rw,noatime 0 0\n"..., 4096) = 694
>>>>>close(3)                                = 0
>>>>>munmap(0x2a9556c000, 4096)              = 0
>>>>>open("/proc/meminfo", O_RDONLY)         = 3
>>>>>fstat(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
>>>>>mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2a9556c000
>>>>>read(3, "MemTotal:      1026832 kB\nMemFre"..., 1024) = 600
>>>>>close(3)                                = 0
>>>>>munmap(0x2a9556c000, 4096)              = 0
>>>>>rt_sigaction(SIGCHLD, {SIG_DFL}, {SIG_DFL}, 8) = 0
>>>>>rt_sigaction(SIGCHLD, {SIG_DFL}, {SIG_DFL}, 8) = 0
>>>>>rt_sigaction(SIGINT, {SIG_DFL}, {SIG_DFL}, 8) = 0
>>>>>rt_sigaction(SIGINT, {SIG_DFL}, {SIG_DFL}, 8) = 0
>>>>>rt_sigaction(SIGQUIT, {SIG_DFL}, {SIG_DFL}, 8) = 0
>>>>>rt_sigaction(SIGQUIT, {SIG_DFL}, {SIG_DFL}, 8) = 0
>>>>>rt_sigprocmask(SIG_BLOCK, NULL, [RTMIN], 8) = 0
>>>>>rt_sigaction(SIGQUIT, {SIG_IGN}, {SIG_DFL}, 8) = 0
>>>>>uname({sys="Linux", node="rudi", ...})  = 0
>>>>>stat("/vms/w2k", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
>>>>>stat(".", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
>>>>>getpid()                                = 11960
>>>>>getppid()                               = 11959
>>>>>getpgrp()                               = 11959
>>>>>rt_sigaction(SIGCHLD, {0x431290, [], SA_RESTORER, 0x2a9579eba0}, {SIG_DFL}, 8) = 0
>>>>>rt_sigprocmask(SIG_BLOCK, NULL, [RTMIN], 8) = 0
>>>>>open("./run", O_RDONLY)                 = 3
>>>>>ioctl(3, SNDCTL_TMR_TIMEBASE or TCGETS, 0x7fbfffefe0) = -1 ENOTTY (Inappropriate ioctl for device)
>>>>>lseek(3, 0, SEEK_CUR)                   = 0
>>>>>read(3, "#!/bin/bash\n/usr/local/bin/qemu "..., 80) = 76
>>>>>lseek(3, 0, SEEK_SET)                   = 0
>>>>>getrlimit(RLIMIT_NOFILE, {rlim_cur=1024, rlim_max=1024}) = 0
>>>>>dup2(3, 255)                            = 255
>>>>>close(3)                                = 0
>>>>>fcntl(255, F_SETFD, FD_CLOEXEC)         = 0
>>>>>fcntl(255, F_GETFL)                     = 0x8000 (flags O_RDONLY|O_LARGEFILE)
>>>>>fstat(255, {st_mode=S_IFREG|0755, st_size=76, ...}) = 0
>>>>>lseek(255, 0, SEEK_CUR)                 = 0
>>>>>rt_sigprocmask(SIG_BLOCK, NULL, [RTMIN], 8) = 0
>>>>>read(255, "#!/bin/bash\n/usr/local/bin/qemu "..., 76) = 76
>>>>>rt_sigprocmask(SIG_BLOCK, NULL, [RTMIN], 8) = 0
>>>>>rt_sigprocmask(SIG_BLOCK, [INT CHLD], [RTMIN], 8) = 0
>>>>>fork()                                  = 11961
>>>>>rt_sigprocmask(SIG_SETMASK, [RTMIN], NULL, 8) = 0
>>>>>rt_sigprocmask(SIG_BLOCK, [CHLD], [RTMIN], 8) = 0
>>>>>rt_sigprocmask(SIG_SETMASK, [RTMIN], NULL, 8) = 0
>>>>>rt_sigprocmask(SIG_BLOCK, [CHLD], [RTMIN], 8) = 0
>>>>>rt_sigaction(SIGINT, {0x4300d0, [], SA_RESTORER, 0x2a9579eba0}, {SIG_DFL}, 8) = 0
>>>>>wait4(-1,  <unfinished ...>
>>>>>          
>>>>>
>>>>>------------------------------------------------------------------------
>>>>>
>>>>>_______________________________________________
>>>>>Qemu-devel mailing list
>>>>>Qemu-devel@nongnu.org
>>>>>http://lists.nongnu.org/mailman/listinfo/qemu-devel
>>>>>          
>>>>>

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