Ubuntu 14.04(32비트)로 업그레이드한 후 발생하기 시작한 분할 오류 문제를 진단하려고 합니다. 업그레이드까지 제대로 작동하는 TSM 클라이언트 6.2.5-4를 실행 중입니다. 문제의 핵심에 도달하기 위해 strace를 사용하려고 시도했지만 문제가 무엇인지 알 수 없습니다.
SIGSEGV는 mmap2 호출 직후에 발생하므로 일반적으로 메모리의 스왑 공간이 부족할 수 있다고 생각했지만 두 가지 모두 사용할 수 있습니다. mmap 호출 직전에 선택 호출의 시간 초과도 있으므로 아마도 그것과 관련이 있을 것입니다.
솔직히 말해서 나는 여기서 조금 벗어났습니다. 우분투 커뮤니티와 TSM 커뮤니티에 물어보려고 했지만 어느 쪽에서도 아무 말도 없었습니다. 그래서 여기 누군가가 이 추적을 읽는 방법을 말해 줄 수 있기를 바라고 있습니다. 그 끝에는 제가 추가합니다(나머지는 여기에서 찾을 수 있습니다).http://pastebin.com/dz1faACE). 도움이 될 수 있는 다른 정보도 제공해 드리겠습니다. 많은 감사드립니다!
open("/etc/mtab", O_RDONLY|O_CLOEXEC) = 4
futex(0xb718be2c, FUTEX_WAKE_PRIVATE, 2147483647) = 0
fstat64(4, {st_mode=S_IFREG|0644, st_size=780, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6a50000
read(4, "/dev/sda1 / ext4 rw,errors=remou"..., 4096) = 780
read(4, "", 4096) = 0
close(4) = 0
munmap(0xb6a50000, 4096) = 0
brk(0x9fa8000) = 0x9fa8000
open("/etc/mtab", O_RDONLY|O_CLOEXEC) = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=780, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6a50000
read(4, "/dev/sda1 / ext4 rw,errors=remou"..., 4096) = 780
brk(0x9fd9000) = 0x9fd9000
read(4, "", 4096) = 0
close(4) = 0
munmap(0xb6a50000, 4096) = 0
open("/proc/mounts", O_RDONLY|O_LARGEFILE) = 4
fstat64(4, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6a50000
read(4, "rootfs / rootfs rw 0 0\nsysfs /sy"..., 1024) = 1024
read(4, "lv001 /data ext4 rw,relatime,dat"..., 1024) = 46
read(4, "", 1024) = 0
close(4) = 0
munmap(0xb6a50000, 4096) = 0
brk(0x9fc0000) = 0x9fc0000
brk(0x9fa8000) = 0x9fa8000
brk(0x9f8f000) = 0x9f8f000
openat(AT_FDCWD, "/tmp/TSM", O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
mmap2(NULL, 512000, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb638b000
open("/etc/mtab", O_RDONLY|O_CLOEXEC) = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=780, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6a50000
read(4, "/dev/sda1 / ext4 rw,errors=remou"..., 4096) = 780
read(4, "", 4096) = 0
close(4) = 0
munmap(0xb6a50000, 4096) = 0
open("/etc/mtab", O_RDONLY|O_CLOEXEC) = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=780, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6a50000
read(4, "/dev/sda1 / ext4 rw,errors=remou"..., 4096) = 780
read(4, "", 4096) = 0
close(4) = 0
munmap(0xb6a50000, 4096) = 0
open("/proc/mounts", O_RDONLY|O_LARGEFILE) = 4
fstat64(4, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6a50000
read(4, "rootfs / rootfs rw 0 0\nsysfs /sy"..., 1024) = 1024
read(4, "lv001 /data ext4 rw,relatime,dat"..., 1024) = 46
read(4, "", 1024) = 0
close(4) = 0
munmap(0xb6a50000, 4096) = 0
statfs64("/", 84, {f_type="EXT2_SUPER_MAGIC", f_bsize=4096, f_blocks=3063340, f_bfree=708785, f_bavail=547416, f_files=786432, f_ffree=540306, f_fsid={-371423568, -29257012}, f_namelen=255, f_frsize=4096, f_flags=4128}) = 0
stat64("/", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
open("/etc/mtab", O_RDONLY|O_CLOEXEC) = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=780, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6a50000
read(4, "/dev/sda1 / ext4 rw,errors=remou"..., 4096) = 780
close(4) = 0
munmap(0xb6a50000, 4096) = 0
statfs64("/proc", 84, {f_type="PROC_SUPER_MAGIC", f_bsize=4096, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={0, 0}, f_namelen=255, f_frsize=4096, f_flags=4142}) = 0
stat64("/proc", {st_mode=S_IFDIR|0555, st_size=0, ...}) = 0
statfs64("/sys", 84, {f_type="SYSFS_MAGIC", f_bsize=4096, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={0, 0}, f_namelen=255, f_frsize=4096, f_flags=4142}) = 0
stat64("/sys", {st_mode=S_IFDIR|0555, st_size=0, ...}) = 0
statfs64("/sys/fs/cgroup", 84, {f_type=0x1021994, f_bsize=4096, f_blocks=1, f_bfree=1, f_bavail=1, f_files=202220, f_ffree=202218, f_fsid={0, 0}, f_namelen=255, f_frsize=4096, f_flags=4128}) = 0
stat64("/sys/fs/cgroup", {st_mode=S_IFDIR|0755, st_size=60, ...}) = 0
statfs64("/sys/fs/fuse/connections", 84, {f_type=0x65735543, f_bsize=4096, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={0, 0}, f_namelen=255, f_frsize=4096, f_flags=4128}) = 0
stat64("/sys/fs/fuse/connections", {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0
statfs64("/sys/kernel/debug", 84, {f_type=0x64626720, f_bsize=4096, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={0, 0}, f_namelen=255, f_frsize=4096, f_flags=4128}) = 0
stat64("/sys/kernel/debug", {st_mode=S_IFDIR|0700, st_size=0, ...}) = 0
statfs64("/sys/kernel/security", 84, {f_type=0x73636673, f_bsize=4096, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={0, 0}, f_namelen=255, f_frsize=4096, f_flags=4128}) = 0
stat64("/sys/kernel/security", {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0
statfs64("/dev", 84, {f_type=0x1021994, f_bsize=4096, f_blocks=1033006, f_bfree=1033003, f_bavail=1033003, f_files=197227, f_ffree=196785, f_fsid={0, 0}, f_namelen=255, f_frsize=4096, f_flags=4128}) = 0
stat64("/dev", {st_mode=S_IFDIR|0755, st_size=4240, ...}) = 0
open("/etc/fstab", O_RDONLY|O_CLOEXEC) = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=989, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6a50000
read(4, "# /etc/fstab: static file system"..., 4096) = 989
read(4, "", 4096) = 0
close(4) = 0
munmap(0xb6a50000, 4096) = 0
open("/etc/mtab", O_RDONLY|O_CLOEXEC) = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=780, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6a50000
read(4, "/dev/sda1 / ext4 rw,errors=remou"..., 4096) = 780
read(4, "", 4096) = 0
close(4) = 0
munmap(0xb6a50000, 4096) = 0
statfs64("/run", 84, {f_type=0x1021994, f_bsize=4096, f_blocks=207101, f_bfree=206972, f_bavail=206972, f_files=202220, f_ffree=201823, f_fsid={0, 0}, f_namelen=255, f_frsize=4096, f_flags=4138}) = 0
stat64("/run", {st_mode=S_IFDIR|0755, st_size=660, ...}) = 0
statfs64("/run/lock", 84, {f_type=0x1021994, f_bsize=4096, f_blocks=1280, f_bfree=1280, f_bavail=1280, f_files=202220, f_ffree=202214, f_fsid={0, 0}, f_namelen=255, f_frsize=4096, f_flags=4142}) = 0
stat64("/run/lock", {st_mode=S_IFDIR|S_ISVTX|0777, st_size=120, ...}) = 0
statfs64("/run/shm", 84, {f_type=0x1021994, f_bsize=4096, f_blocks=1035503, f_bfree=1035503, f_bavail=1035503, f_files=202220, f_ffree=202219, f_fsid={0, 0}, f_namelen=255, f_frsize=4096, f_flags=4134}) = 0
stat64("/run/shm", {st_mode=S_IFDIR|S_ISVTX|0777, st_size=40, ...}) = 0
statfs64("/run/user", 84, {f_type=0x1021994, f_bsize=4096, f_blocks=25600, f_bfree=25600, f_bavail=25600, f_files=202220, f_ffree=202217, f_fsid={0, 0}, f_namelen=255, f_frsize=4096, f_flags=4142}) = 0
stat64("/run/user", {st_mode=S_IFDIR|0755, st_size=80, ...}) = 0
statfs64("/sys/fs/pstore", 84, {f_type=0x6165676c, f_bsize=4096, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={0, 0}, f_namelen=255, f_frsize=4096, f_flags=4128}) = 0
stat64("/sys/fs/pstore", {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0
statfs64("/sys/fs/cgroup/systemd", 84, {f_type=0x27e0eb, f_bsize=4096, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={0, 0}, f_namelen=255, f_frsize=4096, f_flags=4142}) = 0
stat64("/sys/fs/cgroup/systemd", {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0
statfs64("/data", 84, {f_type="EXT2_SUPER_MAGIC", f_bsize=4096, f_blocks=128981614, f_bfree=93342103, f_bavail=86784459, f_files=32768000, f_ffree=32451931, f_fsid={-1906668704, -244025993}, f_namelen=255, f_frsize=4096, f_flags=4128}) = 0
stat64("/data", {st_mode=S_IFDIR|0775, st_size=4096, ...}) = 0
open("/etc/mtab", O_RDONLY|O_CLOEXEC) = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=780, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6a50000
read(4, "/dev/sda1 / ext4 rw,errors=remou"..., 4096) = 780
close(4) = 0
munmap(0xb6a50000, 4096) = 0
munmap(0xb638b000, 512000) = 0
statfs64("/", 84, {f_type="EXT2_SUPER_MAGIC", f_bsize=4096, f_blocks=3063340, f_bfree=708785, f_bavail=547416, f_files=786432, f_ffree=540306, f_fsid={-371423568, -29257012}, f_namelen=255, f_frsize=4096, f_flags=4128}) = 0
stat64("/", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
open("/etc/mtab", O_RDONLY|O_CLOEXEC) = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=780, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6a50000
read(4, "/dev/sda1 / ext4 rw,errors=remou"..., 4096) = 780
close(4) = 0
munmap(0xb6a50000, 4096) = 0
mmap2(NULL, 8392704, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0xb5c07000
mprotect(0xb5c07000, 4096, PROT_NONE) = 0
clone(child_stack=0xb6407424, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tidptr=0xb6407ba8, {entry_number:6, base_addr:0xb6407b40, limit:1048575, seg_32bit:1, contents:0, read_exec_only:0, limit_in_pages:1, seg_not_present:0, useable:1}, child_tidptr=0xb6407ba8) = 13914
select(0, NULL, NULL, NULL, {0, 50000}) = 0 (Timeout)
sched_yield() = 0
mmap2(NULL, 2101248, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb5a06000
--- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0x2} ---
time(NULL) = 1425498940
open("/etc/localtime", O_RDONLY|O_CLOEXEC) = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=2309, ...}) = 0
fstat64(4, {st_mode=S_IFREG|0644, st_size=2309, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6a50000
read(4, "TZif2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\10\0\0\0\10\0\0\0\0"..., 4096) = 2309
_llseek(4, -28, [2281], SEEK_CUR) = 0
read(4, "\nCET-1CEST,M3.5.0,M10.5.0/3\n", 4096) = 28
close(4) = 0
munmap(0xb6a50000, 4096) = 0
write(3, "03/04/2015 20:55:40 ANS0361I DIA"..., 71) = 71
rt_sigaction(SIGABRT, {SIG_DFL, [], SA_RESTORER|SA_STACK|SA_RESTART|SA_INTERRUPT|SA_NODEFER|SA_RESETHAND|SA_SIGINFO|SA_NOCLDSTOP|SA_NOCLDWAIT|0x3fffff8, 0xb770c100}, NULL, 8) = 0
rt_sigprocmask(SIG_UNBLOCK, [ABRT], NULL, 8) = 0
tgkill(13911, 13911, SIGABRT) = 0
--- SIGABRT {si_signo=SIGABRT, si_code=SI_TKILL, si_pid=13911, si_uid=0} ---
+++ killed by SIGABRT (core dumped) +++
Aborted (core dumped)
답변1
옵션은 통화 후 mmap2애플리케이션이 이전에 통화로 매핑되지 않은 주소에 액세스하는 것일 수 있습니다 munmap. 이것은 또한 SIGSEGV. 하지만 이것을 보는 것 이상이 필요합니다 strace. 일부 메모리 디버거는 런타임에 valgrind.
에서 man 2 munmap:
int munmap(void *addr, size_t length);[...]
주소 addr은 페이지 크기의 배수여야 합니다. 표시된 범위의 일부를 포함하는 모든 페이지는 매핑 해제되며 이러한 페이지에 대한 후속 참조는 SIGSEGV를 생성합니다. 표시된 범위에 매핑된 페이지가 포함되어 있지 않으면 오류가 아닙니다.