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(ITS#7846) LMDB failing on ARM9/linux-3.3.0

To: openldap-its@OpenLDAP.org
Subject: (ITS#7846) LMDB failing on ARM9/linux-3.3.0
From: ravas@tind.sk
Date: Fri, 2 May 2014 10:12:20 GMT
Auto-submitted: auto-generated (OpenLDAP-ITS)
Full_Name: Stanislav Ravas
Version: 49ae28a2eec73bdf8e5811a1880ea6229ad10b38
OS: buildroot, gcc-4.7.3
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (193.87.79.243)


LMDB mtest fails when running on ARM platform (kernel v3.3.0, gcc-4.7.3 with
uclibc-0.9.33.2, ARM926ejs CPU).

mtest output:
Adding 348 values
58 duplicates skipped
Deleted 0 values
Cursor next
Cursor last
mtest.c:111: mdb_cursor_get(cursor, &key, &data, MDB_LAST): MDB_NOTFOUND: No
matching key/data pair found
Aborted

I've discovered this bug when debugging my application. mdb_cursor_put() was
returning MDB_NOTFOUND, I think it came from mdb_page_search(). So I ran mtest
to rule out my application as the cause.

So far I can provide mtest strace log:
execve("./lmdb6-mtest", ["./lmdb6-mtest"], [/* 22 vars */]) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|MAP_UNINITIALIZED, -1, 0) = 0xb6ffa000
stat("/etc/ld.so.cache", {st_mode=S_IFREG|0644, st_size=8680, ...}) = 0
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
mmap2(NULL, 8680, PROT_READ, MAP_SHARED, 3, 0) = 0xb6ff7000
close(3)                                = 0
open("/lib/libpthread.so.0", O_RDONLY)  = 3
fstat(3, {st_mode=S_IFREG|0755, st_size=95305, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|MAP_UNINITIALIZED, -1, 0) = 0xb6ff6000
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0\260C\0\0004\0\0\0"...,
4096) = 4096
mmap2(NULL, 114688, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6fd1000
mmap2(0xb6fd1000, 67452, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 0) =
0xb6fd1000
mmap2(0xb6fe9000, 4124, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3, 0x10000)
= 0xb6fe9000
mmap2(0xb6feb000, 4328, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xb6feb000
close(3)                                = 0
munmap(0xb6ff6000, 4096)                = 0
open("/lib/libc.so.0", O_RDONLY)        = 3
fstat(3, {st_mode=S_IFREG|0755, st_size=358156, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|MAP_UNINITIALIZED, -1, 0) = 0xb6ff6000
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0\360\253\0\0004\0\0\0"...,
4096) = 4096
mmap2(NULL, 413696, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6f6c000
mmap2(0xb6f6c000, 354188, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 0) =
0xb6f6c000
mmap2(0xb6fca000, 4852, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3, 0x56000)
= 0xb6fca000
mmap2(0xb6fcc000, 17520, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xb6fcc000
close(3)                                = 0
munmap(0xb6ff6000, 4096)                = 0
stat("/lib/ld-uClibc.so.0", {st_mode=S_IFREG|0755, st_size=29392, ...}) = 0
open("/lib/libdl.so.0", O_RDONLY)       = 3
fstat(3, {st_mode=S_IFREG|0755, st_size=13216, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|MAP_UNINITIALIZED, -1, 0) = 0xb6ff6000
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0\200\v\0\0004\0\0\0"...,
4096) = 4096
mmap2(NULL, 49152, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6f60000
mmap2(0xb6f60000, 8660, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 0) =
0xb6f60000
mmap2(0xb6f6a000, 4120, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3, 0x2000)
= 0xb6f6a000
close(3)                                = 0
munmap(0xb6ff6000, 4096)                = 0
open("/lib/libc.so.0", O_RDONLY)        = 3
fstat(3, {st_mode=S_IFREG|0755, st_size=358156, ...}) = 0
close(3)                                = 0
open("/lib/libc.so.0", O_RDONLY)        = 3
fstat(3, {st_mode=S_IFREG|0755, st_size=358156, ...}) = 0
close(3)                                = 0
munmap(0xb6ff7000, 8680)                = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|MAP_UNINITIALIZED, -1, 0) = 0xb6ff9000
set_tls(0xb6ff9480, 0xb6ff9b20, 0xb6ff9b28, 0xb6ff9480, 0xb6ffbf74) = 0
mprotect(0xb6fe9000, 4096, PROT_READ)   = 0
mprotect(0xb6fca000, 4096, PROT_READ)   = 0
mprotect(0xb6ffb000, 4096, PROT_READ)   = 0
mprotect(0xb6f6a000, 4096, PROT_READ)   = 0
set_tid_address(0xb6ff9068)             = 1748
set_robust_list(0xb6ff9070, 12)         = 0
rt_sigaction(SIGRTMIN, {0xb6fda708, [], SA_SIGINFO|0x4000000}, NULL, 8) = 0
rt_sigaction(SIGRT_1, {0xb6fda5ac, [], SA_RESTART|SA_SIGINFO|0x4000000}, NULL,
8) = 0
rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
getrlimit(RLIMIT_STACK, {rlim_cur=18014398505295872*1024,
rlim_max=1152921524856792492}) = 0
ioctl(0, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS, {B38400
opost isig icanon echo ...}) = 0
ioctl(1, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS, {B38400
opost isig icanon echo ...}) = 0
gettimeofday({1399032254, 599658}, NULL) = 0
brk(0)                                  = 0x355000
brk(0x356000)                           = 0x356000
mmap2(NULL, 528384, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0) =
0xb6edf000
mmap2(NULL, 1052672, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0) =
0xb6dde000
open("./testdb/lock.mdb", O_RDWR|O_CREAT|O_CLOEXEC, 0664) = 3
fcntl64(3, 0x6 /* F_??? */, 0xbef42940) = 0
lseek(3, 0, SEEK_END)                   = 0
ftruncate(3, 8192)                      = 0
mmap2(NULL, 8192, PROT_READ|PROT_WRITE, MAP_SHARED, 3, 0) = 0xb6ff7000
open("./testdb/data.mdb", O_RDWR|O_CREAT, 0664) = 4
pread(4, "", 92, 0)                     = 0
mmap2(NULL, 10485760, PROT_READ, MAP_SHARED, 4, 0) = 0xb63de000
brk(0x358000)                           = 0x358000
pwrite(4, "\0\0\0\0\0\0\10\0\0\0\0\0\336\300\357\276\1\0\0\0\0\340=\266\0\0\240\0\0\20\0\0"...,
8192, 0) = 8192
open("./testdb/data.mdb", O_RDWR|O_SYNC) = 5
fcntl64(3, 0x6 /* F_??? */, 0xbef42984) = 0
write(1, "Adding 79 values\n", 17Adding 79 values
)      = 17
write(1, "2 duplicates skipped\n", 212 duplicates skipped
)  = 21
pwrite(4, "\2\0\0\0\0\0\2\0\246\0\304\2\204\5\20\7H\16\354\7\244\t0\v\30\10L\t\360\r\344\6"...,
4096, 0) = 4096
fdatasync(4)                            = 0
pwrite(5, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\377\377\377\377\0\0\0\0\0\0\1\0\0\0"...,
58, 0) = 58
write(1, "Deleted 0 values\n", 17Deleted 0 values
)      = 17
write(1, "Cursor next\n", 12Cursor next
)           = 12
write(1, "Cursor last\n", 12Cursor last
)           = 12
write(2, "mtest.c", 7mtest.c)                  = 7
write(2, ":", 1:)                        = 1
write(2, "111", 3111)                      = 3
write(2, ": ", 2: )                       = 2
write(2, "mdb_cursor_get(cursor, &key, &da"..., 45mdb_cursor_get(cursor, &key,
&data, MDB_LAST)) = 45
write(2, ": ", 2: )                       = 2
write(2, "MDB_NOTFOUND: No matching key/da"..., 45MDB_NOTFOUND: No matching
key/data pair found) = 45
write(2, "\n", 1
)                       = 1
rt_sigprocmask(SIG_UNBLOCK, [ABRT], NULL, 8) = 0
tgkill(1748, 1748, SIGABRT)             = 0
--- SIGABRT {si_signo=SIGABRT, si_code=SI_TKILL, si_pid=1748, si_uid=0} ---
+++ killed by SIGABRT +++
Aborted
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