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Date: Fri, 30 Sep 2011 13:20:12 -0700
From: Robin Lee Powell <rlpowell@digitalkingdom.org>
To: lojban@googlegroups.com
Subject: [lojban] Someone wanna debug our jbofihe problems?
Message-ID: <20110930202012.GE20043@stodi.digitalkingdom.org>
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Yes, but unfortunately I have no idea what's causing it or how to
fix it.  I'm told a reload usually clears it up.

Oh, huh, I can replicate on the command line.  Hmmm...

It happens about one time in five.

There is no memory pressure on the host.  There are no SELinux
errors (in fact, turning SELinux off doesn't fix it).

I seriously have no idea what's up here at all.  Anyone who wants an account to
investigate it is welcome to it.  An strace of a fail and then a good run are
below (both are short).

Interestingly, it's not actually on the mmap that it fails.  *shrug*

-Robin

- -----------------------------------------------------------
rlpowell@jukni> echo "mi klama" | strace -ff /usr/local/bin/jbofihe -x 2>&1                                     
execve("/usr/local/bin/jbofihe", ["/usr/local/bin/jbofihe", "-x"], [/* 45 vars */]) = 0
brk(0)                                  = 0xb84000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b77a4ead000
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=35848, ...}) = 0
mmap(NULL, 35848, PROT_READ, MAP_PRIVATE, 3, 0) = 0x2b77a4eae000
close(3)                                = 0
open("/lib64/libc.so.6", O_RDONLY)      = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\260\24\2k6\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1951736, ...}) = 0
mmap(0x366b000000, 3773688, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x366b000000
mprotect(0x366b18f000, 2097152, PROT_NONE) = 0
mmap(0x366b38f000, 20480, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x18f000) = 0x366b38f000
mmap(0x366b394000, 21752, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x366b394000
close(3)                                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b77a4eb7000
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b77a4eb8000
arch_prctl(ARCH_SET_FS, 0x2b77a4eb7b40) = 0
mprotect(0x366b38f000, 16384, PROT_READ) = 0
mprotect(0x366ae1e000, 4096, PROT_READ) = 0
munmap(0x2b77a4eae000, 35848)           = 0
rt_sigaction(SIGABRT, {0x401920, [ABRT], SA_RESTORER|SA_RESTART, 0x366b035350}, {SIG_DFL, [], 0}, 8) = 0
rt_sigaction(SIGBUS, {0x401920, [BUS], SA_RESTORER|SA_RESTART, 0x366b035350}, {SIG_DFL, [], 0}, 8) = 0
rt_sigaction(SIGSEGV, {0x401920, [SEGV], SA_RESTORER|SA_RESTART, 0x366b035350}, {SIG_DFL, [], 0}, 8) = 0
fstat(0, {st_mode=S_IFIFO|0600, st_size=0, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b77a4eae000
read(0, "mi klama\n", 4096)             = 9
brk(0)                                  = 0xb84000
brk(0xba5000)                           = 0xba5000
brk(0)                                  = 0xba5000
read(0, "", 4096)                       = 0
fstat(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 1), ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b77a4eaf000
open("/usr/local/lib/jbofihe/smujmaji.dat", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=241214, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b77a4eb0000
read(3, "\0\0006B\5\4\5\5\5\5\5\4\5\5\4\4\4\6\5\5\4\6\5\6\5\3\4\6\4\4\4\5"..., 4096) = 4096
mmap(NULL, 225280, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b77a4eba000
read(3, "\4\4\4\5\5\5\4\5\4\7\4\6\4\4\4\10\5\4\5\10\4\6\5\6\4\10\4\4\5\7\4\5"..., 4096) = 4096
read(3, "\3\3\5\5\5\5\5\5\5\5\5\5\4\3\7\3\6\4\5\3\7\3\3\2\5\5\5\3\10\4\5\4"..., 4096) = 4096
read(3, "\5\5\4\5\5\5\5\5\4\5\4\5\4\5\5\5\4\5\4\5\5\5\5\5\5\5\5\5\5\5\4\5"..., 4096) = 4096
read(3, "\6\24\5\5\6\t\6\10\6\32\7\f\5\5\6\7\6\20\5\7\6\t\6\6\6\r\5\4\6\6\6\16"..., 4096) = 4096
read(3, "\6\37\7\r\6\"\7\17\5\f\6\v\6\16\5\6\6\10\6\25\7\v\5\5\6\16\6\10\5\5\6\7"..., 4096) = 4096
read(3, "\6\21\5\5\6\17\6\5\6\22\6\23\5\10\6\n\6\v\6\32\6\r\5\3\6\7\6\r\6\24\5\6"..., 4096) = 4096
fstat(3, {st_mode=S_IFREG|0644, st_size=241214, ...}) = 0
lseek(3, 0, SEEK_CUR)                   = 28672
mmap(NULL, 241214, PROT_READ, MAP_SHARED, 3, 0) = 0x2b77a4ef1000
dup(2)                                  = 4
fcntl(4, F_GETFL)                       = 0x8002 (flags O_RDWR|O_LARGEFILE)
fstat(4, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 1), ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b77a4f2c000
lseek(4, 0, SEEK_CUR)                   = -1 ESPIPE (Illegal seek)
write(4, "Could not mmap the dictionary da"..., 35Could not mmap the dictionary data
) = 35
write(4, ": Success\n", 10: Success
)             = 10
close(4)                                = 0
munmap(0x2b77a4f2c000, 4096)            = 0
write(1, "[([", 3[([)                      = 3
exit_group(1)                           = ?
- -----------------------------------------------------------
rlpowell@jukni> echo "mi klama" | strace -ff /usr/local/bin/jbofihe -x 2>&1                                     
execve("/usr/local/bin/jbofihe", ["/usr/local/bin/jbofihe", "-x"], [/* 45 vars */]) = 0
brk(0)                                  = 0x10a5000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b9034160000
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=35848, ...}) = 0
mmap(NULL, 35848, PROT_READ, MAP_PRIVATE, 3, 0) = 0x2b9034161000
close(3)                                = 0
open("/lib64/libc.so.6", O_RDONLY)      = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\260\24\2k6\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1951736, ...}) = 0
mmap(0x366b000000, 3773688, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x366b000000
mprotect(0x366b18f000, 2097152, PROT_NONE) = 0
mmap(0x366b38f000, 20480, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x18f000) = 0x366b38f000
mmap(0x366b394000, 21752, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x366b394000
close(3)                                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b903416a000
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b903416b000
arch_prctl(ARCH_SET_FS, 0x2b903416ab40) = 0
mprotect(0x366b38f000, 16384, PROT_READ) = 0
mprotect(0x366ae1e000, 4096, PROT_READ) = 0
munmap(0x2b9034161000, 35848)           = 0
rt_sigaction(SIGABRT, {0x401920, [ABRT], SA_RESTORER|SA_RESTART, 0x366b035350}, {SIG_DFL, [], 0}, 8) = 0
rt_sigaction(SIGBUS, {0x401920, [BUS], SA_RESTORER|SA_RESTART, 0x366b035350}, {SIG_DFL, [], 0}, 8) = 0
rt_sigaction(SIGSEGV, {0x401920, [SEGV], SA_RESTORER|SA_RESTART, 0x366b035350}, {SIG_DFL, [], 0}, 8) = 0
fstat(0, {st_mode=S_IFIFO|0600, st_size=0, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b9034161000
read(0, "mi klama\n", 4096)             = 9
brk(0)                                  = 0x10a5000
brk(0x10c6000)                          = 0x10c6000
brk(0)                                  = 0x10c6000
read(0, "", 4096)                       = 0
fstat(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 1), ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b9034162000
open("/usr/local/lib/jbofihe/smujmaji.dat", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=241214, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b9034163000
read(3, "\0\0006B\5\4\5\5\5\5\5\4\5\5\4\4\4\6\5\5\4\6\5\6\5\3\4\6\4\4\4\5"..., 4096) = 4096
mmap(NULL, 225280, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b903416d000
read(3, "\4\4\4\5\5\5\4\5\4\7\4\6\4\4\4\10\5\4\5\10\4\6\5\6\4\10\4\4\5\7\4\5"..., 4096) = 4096
read(3, "\3\3\5\5\5\5\5\5\5\5\5\5\4\3\7\3\6\4\5\3\7\3\3\2\5\5\5\3\10\4\5\4"..., 4096) = 4096
read(3, "\5\5\4\5\5\5\5\5\4\5\4\5\4\5\5\5\4\5\4\5\5\5\5\5\5\5\5\5\5\5\4\5"..., 4096) = 4096
read(3, "\6\24\5\5\6\t\6\10\6\32\7\f\5\5\6\7\6\20\5\7\6\t\6\6\6\r\5\4\6\6\6\16"..., 4096) = 4096
read(3, "\6\37\7\r\6\"\7\17\5\f\6\v\6\16\5\6\6\10\6\25\7\v\5\5\6\16\6\10\5\5\6\7"..., 4096) = 4096
read(3, "\6\21\5\5\6\17\6\5\6\22\6\23\5\10\6\n\6\v\6\32\6\r\5\3\6\7\6\r\6\24\5\6"..., 4096) = 4096
fstat(3, {st_mode=S_IFREG|0644, st_size=241214, ...}) = 0
lseek(3, 0, SEEK_CUR)                   = 28672
mmap(NULL, 241214, PROT_READ, MAP_SHARED, 3, 0) = 0x2b90341a4000
lseek(3, 27784, SEEK_SET)               = 27784
close(3)                                = 0
munmap(0x2b9034163000, 4096)            = 0
write(1, "[([klama1 (go-er(s)):] mi", 25[([klama1 (go-er(s)):] mi) = 25
write(1, " /I, me/) /[is, does]/ <<klama", 30 /I, me/) /[is, does]/ <<klama) = 30
write(1, " /go-ing/>>]\n", 13 /go-ing/>>]
)          = 13
exit_group(0)                           = ?
- -----------------------------------------------------------

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