Coredump被截断了

Question

我正在设定

ulimit -c unlimited. 

在c ++程序中我们正在做

struct rlimit corelimit;
  if (getrlimit(RLIMIT_CORE, &corelimit) != 0) {
    return -1;
  }
  corelimit.rlim_cur = RLIM_INFINITY;
  corelimit.rlim_max = RLIM_INFINITY;
  if (setrlimit(RLIMIT_CORE, &corelimit) != 0) {
    return -1;
  }

但是每当程序崩溃时,它生成的核心转储就会被截断.

BFD: Warning: /mnt/coredump/core.6685.1325912972 is truncated: expected core file size >= 1136525312, found: 638976.

可能是什么问题？

我们正在使用 Ubuntu 10.04.3 LTS

Linux ip-<ip> 2.6.32-318-ec2 #38-Ubuntu SMP Thu Sep 1 18:09:30 UTC 2011 x86_64 GNU/Linux

这是我的/etc/security/limits.conf

# /etc/security/limits.conf
#
#Each line describes a limit for a user in the form:
#
#<domain>        <type>  <item>  <value>
#
#Where:
#<domain> can be:
#        - an user name
#        - a group name, with @group syntax
#        - the wildcard *, for default entry
#        - the wildcard %, can be also used with %group syntax,
#                 for maxlogin limit
#        - NOTE: group and wildcard limits are not applied to root.
#          To apply a limit to the root user, <domain> must be
#          the literal username root.
#
#<type> can have the two values:
#        - "soft" for enforcing the soft limits
#        - "hard" for enforcing hard limits
#
#<item> can be one of the following:
#        - core - limits the core file size (KB)
#        - data - max data size (KB)
#        - fsize - maximum filesize (KB)
#        - memlock - max locked-in-memory address space (KB)
#        - nofile - max number of open files
#        - rss - max resident set size (KB)
#        - stack - max stack size (KB)
#        - cpu - max CPU time (MIN)
#        - nproc - max number of processes
#        - as - address space limit (KB)
#        - maxlogins - max number of logins for this user
#        - maxsyslogins - max number of logins on the system
#        - priority - the priority to run user process with
#        - locks - max number of file locks the user can hold
#        - sigpending - max number of pending signals
#        - msgqueue - max memory used by POSIX message queues (bytes)
#        - nice - max nice priority allowed to raise to values: [-20, 19]
#        - rtprio - max realtime priority
#        - chroot - change root to directory (Debian-specific)
#
#<domain>      <type>  <item>         <value>
#

#*               soft    core            0
#root            hard    core            100000
#*               hard    rss             10000
#@student        hard    nproc           20
#@faculty        soft    nproc           20
#@faculty        hard    nproc           50
#ftp             hard    nproc           0
#    ftp             -       chroot          /ftp
#@student        -       maxlogins       4



#for all users
* hard nofile 16384
* soft nofile 9000

更多细节

我正在使用gcc优化标志

O3 

我正在设置堆栈线程大小.5 mb.

Answer 1

如果您正在使用coredumpctl，一个可能的解决方案可能是编辑/etc/systemd/coredump.conf和增加ProcessSizeMax和ExternalSizeMax：

[Coredump]
#Storage=external
#Compress=yes
ProcessSizeMax=20G
ExternalSizeMax=20G
#JournalSizeMax=767M
#MaxUse=
#KeepFree=

Answer 2

我记得有一个硬限制可以由管理员设置，还有一个软限制可以由用户设置。如果软限制强于硬限制，则采用硬限制值。我不确定这对任何 shell 都有效，我只从 bash 知道它。