Bug#30640: marked as done (libc6 resolver ???)
Your message dated Fri, 17 Sep 1999 12:52:57 -0700
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Date: Sat, 12 Dec 1998 12:07:27 +0100 (CET)
From: <milan@ala.cmm.ki.si>
Subject: libc6 resolver ???
To: submit@bugs.debian.org
Bcc:
X-Mailer: bug 3.1.7
Package: libc6
Version: 2.0.7u-7.1
The new libc6 libraries have some problems with host name resolver. I
found this wrong behaviour using MPICH-1.1.1. This is the otuput of
the strace parallel-application command using newer and older
libraries.
Failed run with libc6_2.0.7u-{6,7,7.1}.deb
close(3) = 0
open("/lib/libresolv.so.2", O_RDONLY) = 3
mmap(0, 4096, PROT_READ, MAP_PRIVATE, 3, 0) = 0x40010000
munmap(0x40010000, 4096) = 0
mmap(0, 57200, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0x40010000
mprotect(0x4001b000, 12144, PROT_NONE) = 0
mmap(0x4001b000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3, 0xa000) = 0x4001b000
mmap(0x4001c000, 8048, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x4001c000
close(3) = 0
time(NULL) = 913374119
time(NULL) = 913374119
time(NULL) = 913374119
time(NULL) = 913374119
time(NULL) = 913374119
time(NULL) = 913374119
time(NULL) = 913374119
time(NULL) = 913374119
time(NULL) = 913374119
There is a timeout loop in MPICH library (p4_sock_util.c - line 635),
so there are many time() calls....
=============================================================
Succesfull run with libc6_2.0.7u-5.deb and before...
close(3) = 0
open("/lib/ld-linux.so.2", O_RDONLY) = 3
mmap(0, 4096, PROT_READ, MAP_PRIVATE, 3, 0) = 0x400ae000
munmap(0x400ae000, 4096) = 0
mmap(0, 46748, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0x400ae000
mprotect(0x400b8000, 5788, PROT_NONE) = 0
mmap(0x400b8000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3, 0x9000) = 0x400b8000
close(3) = 0
mprotect(0x400ae000, 40960, PROT_READ|PROT_WRITE) = 0
mprotect(0x400ae000, 40960, PROT_READ|PROT_EXEC) = 0
getpid() = 16153
munmap(0x40000000, 14939) = 0
gettimeofday({913459361, 801323}, NULL) = 0
getpid() = 16153
open("/etc/resolv.conf", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=106, ...}) = 0
mmap(0, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x40000000
read(3, "#nameserver 127.0.0.1\nsearch cm"..., 4096) = 106
read(3, "", 4096) = 0
close(3) = 0
munmap(0x40000000, 4096) = 0
brk(0) = 0xf430000
brk(0xf430080) = 0xf430080
brk(0) = 0xf430080
brk(0xf431000) = 0xf431000
open("/etc/hosts", O_RDONLY) = 3
fcntl(3, F_GETFD) = 0
fcntl(3, F_SETFD, FD_CLOEXEC) = 0
fstat(3, {st_mode=S_IFREG|0644, st_size=52, ...}) = 0
mmap(0, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x40000000
read(3, "127.0.0.1\tlocalhost\n193.2.10.1"..., 4096) = 52
close(3) = 0
munmap(0x40000000, 4096) = 0
-- System Information
Debian Release: slink
Kernel Version: Linux ala 2.1.131 #3 SMP Tue Dec 8 00:42:51 CET 1998 i686 unknown
Versions of the packages libc6 depends on:
ii ldso 1.9.9-5 The Linux dynamic linker, library and utilit
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