你把gdb ./firefox-bin
后的后续输入输出给我看看

gdb ./firefox-bin后的显示：
GNU gdb Fedora (6.8-31mgc25)
Copyright (C) 2008 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "i686-magic-linux-gnu"...
(no debugging symbols found)
Missing separate debuginfos, use: debuginfo-install firefox-4.0b4-1mgc25.i686
(gdb)          
                    
是不是缺点东西不能用？

那直接输入run啊


虽然你这个没-g信息，可以看出模块的追溯就行

(gdb) run
Starting program: /usr/lib/firefox-4.0b4/firefox-bin
(no debugging symbols found)
(no debugging symbols found)
/usr/lib/firefox-4.0b4/firefox-bin: error while loading shared libraries: libmozalloc.so: cannot open shared object file: No such file or directory

Program exited with code 0177.
(gdb)

你不是说打开后才崩溃么

你这个都缺少共享库，连运行都运行不了


另一个原因是，你原来执行的并不是firefox-bin

是打开后才崩溃，执行"firefox-bin"是运行不了的，是执行"firefox"运行。
运行gdb ./firefox后提示“firefox“ not in executable format: File format not recognized

那就要看一下firefox的内容

你必须找到firefox的真正可执行文件或者执行的命令行

请帮忙看"firefox"中的内容：
#!/bin/sh
#
# ***** BEGIN LICENSE BLOCK *****
# Version: MPL 1.1/GPL 2.0/LGPL 2.1
#
# The contents of this file are subject to the Mozilla Public License Version
# 1.1 (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
# http://www.mozilla.org/MPL/
#
# Software distributed under the License is distributed on an "AS IS" basis,
# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
# for the specific language governing rights and limitations under the
# License.
#
# The Original Code is mozilla.org code.
#
# The Initial Developer of the Original Code is
# Netscape Communications Corporation.
# Portions created by the Initial Developer are Copyright (C) 1998
# the Initial Developer. All Rights Reserved.
#
# Contributor(s):
#
# Alternatively, the contents of this file may be used under the terms of
# either the GNU General Public License Version 2 or later (the "GPL"), or
# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
# in which case the provisions of the GPL or the LGPL are applicable instead
# of those above. If you wish to allow use of your version of this file only
# under the terms of either the GPL or the LGPL, and not to allow others to
# use your version of this file under the terms of the MPL, indicate your
# decision by deleting the provisions above and replace them with the notice
# and other provisions required by the GPL or the LGPL. If you do not delete
# the provisions above, a recipient may use your version of this file under
# the terms of any one of the MPL, the GPL or the LGPL.
#
# ***** END LICENSE BLOCK *****

##
## Usage:
##
## $ mozilla [args]
##
## This script is meant to run the application binary from mozilla/dist/bin.
##
## The script will setup all the environment voodoo needed to make
## the application binary to work.
##

#uncomment for debugging
#set -x

moz_libdir=/usr/local/lib/firefox-5.0.1

# Use run-mozilla.sh in the current dir if it exists
# If not, then start resolving symlinks until we find run-mozilla.sh
found=0
progname="$0"
curdir=`dirname "$progname"`
progbase=`basename "$progname"`
run_moz="$curdir/run-mozilla.sh"
if test -x "$run_moz"; then
  dist_bin="$curdir"
  found=1
else
  here=`/bin/pwd`
  while [ -h "$progname" ]; do
    bn=`basename "$progname"`
    cd `dirname "$progname"`
    # Resolve symlink of dirname
    cd `/bin/pwd`
    progname=`/bin/ls -l "$bn" | sed -e 's/^.* -> //' `
    progbase=`basename "$progname"`
    if [ ! -x "$progname" ]; then
      break
    fi
    curdir=`dirname "$progname"`
    run_moz="$curdir/run-mozilla.sh"
    if [ -x "$run_moz" ]; then
      cd "$curdir"
      dist_bin=`/bin/pwd`
      run_moz="$dist_bin/run-mozilla.sh"
      found=1
      break
    fi
  done
  cd "$here"
fi
if [ $found = 0 ]; then
  # Check default compile-time libdir
  if [ -x "$moz_libdir/run-mozilla.sh" ]; then
    dist_bin="$moz_libdir"
    run_moz="$moz_libdir/run-mozilla.sh"
  else
    echo "Cannot find Firefox runtime directory. Exiting."
    exit 1
  fi
fi

script_args=""
debugging=0
MOZILLA_BIN="${progbase}-bin"

if [ "$OSTYPE" = "beos" ]; then
  mimeset -F "$MOZILLA_BIN"
fi

pass_arg_count=0
while [ $# -gt $pass_arg_count ]
do
  case "$1" in
    -p | --pure | -pure)
      MOZILLA_BIN="${MOZILLA_BIN}.pure"
      shift
      ;;
    -g | --debug)
      script_args="$script_args -g"
      debugging=1
      shift
      ;;
    -d | --debugger)
      script_args="$script_args -d $2"
      shift 2
      ;;
    *)
      # Move the unrecognized argument to the end of the list.
      arg="$1"
      shift
      set -- "$@" "$arg"
      pass_arg_count=`expr $pass_arg_count + 1`
      ;;
  esac
done

if [ $debugging = 1 ]
then
  echo $dist_bin/run-mozilla.sh $script_args $dist_bin/$MOZILLA_BIN "$@"
fi
exec "$dist_bin/run-mozilla.sh" $script_args "$dist_bin/$MOZILLA_BIN" "$@"
# EOF.

坛用者：大家好，我最近用firefox的linux版经常崩溃，表现在点“首选项”的“应用程序”崩溃，浏览一些网页时崩溃，输入用户名和密码后登陆一些论坛崩溃，崩溃重启后反复崩溃。删除配置文件也没用，不同版本的firefox，甚至点seamonkey的“应用程序助手”也崩溃，总之firfox怎样崩溃，seamonkey也怎样崩溃。我怀疑跟系统出问题有关，因为以前是正常的。请懂的人帮帮我，谢谢。回到原帖

ubuntu下一直没出现过你这问题

它让你用run-mozilla.sh

所以要看run-mozilla.sh的内容

rum-mozilla.sh中的内容：
#!/bin/sh
#
# ***** BEGIN LICENSE BLOCK *****
# Version: MPL 1.1/GPL 2.0/LGPL 2.1
#
# The contents of this file are subject to the Mozilla Public License Version
# 1.1 (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
# http://www.mozilla.org/MPL/
#
# Software distributed under the License is distributed on an "AS IS" basis,
# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
# for the specific language governing rights and limitations under the
# License.
#
# The Original Code is mozilla.org code.
#
# The Initial Developer of the Original Code is
# Netscape Communications Corporation.
# Portions created by the Initial Developer are Copyright (C) 1998
# the Initial Developer. All Rights Reserved.
#
# Contributor(s):
#
# Alternatively, the contents of this file may be used under the terms of
# either of the GNU General Public License Version 2 or later (the "GPL"),
# or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
# in which case the provisions of the GPL or the LGPL are applicable instead
# of those above. If you wish to allow use of your version of this file only
# under the terms of either the GPL or the LGPL, and not to allow others to
# use your version of this file under the terms of the MPL, indicate your
# decision by deleting the provisions above and replace them with the notice
# and other provisions required by the GPL or the LGPL. If you do not delete
# the provisions above, a recipient may use your version of this file under
# the terms of any one of the MPL, the GPL or the LGPL.
#
# ***** END LICENSE BLOCK *****
cmdname=`basename "$0"`
MOZ_DIST_BIN=`dirname "$0"`
MOZ_DEFAULT_NAME="./${cmdname}-bin"
MOZ_APPRUNNER_NAME="./mozilla-bin"
MOZ_PROGRAM=""

exitcode=1
#
##
## Functions
##
##########################################################################
moz_usage()
{
echo "Usage:  ${cmdname} [options] [program]"
echo ""
echo "  options:"
echo ""
echo "    -g                   Run in debugger."
echo "    --debug"
echo ""
echo "    -d debugger          Debugger to use."
echo "    --debugger debugger"
echo ""
echo "    -a debugger_args     Arguments passed to [debugger]."
echo "    --debugger-args debugger_args"
echo ""
echo "  Examples:"
echo ""
echo "  Run the mozilla-bin binary"
echo ""
echo "    ${cmdname} mozilla-bin"
echo ""
echo "  Debug the mozilla-bin binary in gdb"
echo ""
echo "    ${cmdname} -g mozilla-bin -d gdb"
echo ""
echo "  Run mozilla-bin under valgrind with arguments"
echo ""
echo "    ${cmdname} -g -d valgrind -a '--tool=memcheck --leak-check=full' mozilla-bin"
echo ""
return 0
}
##########################################################################
moz_bail()
{
message=$1
echo
echo "$cmdname: $message"
echo
exit 1
}
##########################################################################
moz_test_binary()
{
binary=$1
if [ -f "$binary" ]
then
if [ -x "$binary" ]
then
return 1
fi
fi
return 0
}
##########################################################################
moz_get_debugger()
{
debuggers="ddd gdb dbx bdb native-gdb"
debugger="notfound"
done="no"
for d in $debuggers
do
moz_test_binary /bin/which
if [ $? -eq 1 ]
then
dpath=`which ${d}`
else
dpath=`LC_MESSAGES=C type ${d} | awk '{print $3;}' | sed -e 's/\.$//'`
fi
if [ -x "$dpath" ]
then
debugger=$dpath
break
fi
done
echo $debugger
return 0
}
##########################################################################
moz_run_program()
{
prog=$MOZ_PROGRAM
##
## Make sure the program is executable
##
if [ ! -x "$prog" ]
then
moz_bail "Cannot execute $prog."
fi
##
## Run the program
##
exec "$prog" ${1+"$@"}
exitcode=$?
}
##########################################################################
moz_debug_program()
{
prog=$MOZ_PROGRAM
##
## Make sure the program is executable
##
if [ ! -x "$prog" ]
then
moz_bail "Cannot execute $prog."
fi
if [ -n "$moz_debugger" ]
then
moz_test_binary /bin/which
if [ $? -eq 1 ]
then
debugger=`which $moz_debugger`
else
debugger=`LC_MESSAGES=C type $moz_debugger | awk '{print $3;}' | sed -e 's/\.$//'`
fi
else
debugger=`moz_get_debugger`
fi
    if [ -x "$debugger" ]
    then
# If you are not using ddd, gdb and know of a way to convey the arguments
# over to the prog then add that here- Gagan Saksena 03/15/00
        case `basename $debugger` in
            native-gdb) echo "$debugger $moz_debugger_args --args $prog" ${1+"$@"}
                exec "$debugger" $moz_debugger_args --args "$prog" ${1+"$@"}
                exitcode=$?
                ;;
            gdb) echo "$debugger $moz_debugger_args --args $prog" ${1+"$@"}
                exec "$debugger" $moz_debugger_args --args "$prog" ${1+"$@"}
exitcode=$?
                ;;
            ddd) echo "$debugger $moz_debugger_args --gdb -- --args $prog" ${1+"$@"}
exec "$debugger" $moz_debugger_args --gdb -- --args "$prog" ${1+"$@"}
exitcode=$?
                ;;
            *) echo "$debugger $moz_debugger_args $prog ${1+"$@"}"
                exec $debugger $moz_debugger_args "$prog" ${1+"$@"}
exitcode=$?
                ;;
        esac
    else
        moz_bail "Could not find a debugger on your system."
    fi
}
##########################################################################
##
## Command line arg defaults
##
moz_debug=0
moz_debugger=""
moz_debugger_args=""
#
##
## Parse the command line
##
while [ $# -gt 0 ]
do
  case $1 in
    -g | --debug)
      moz_debug=1
      shift
      ;;
    -d | --debugger)
      moz_debugger=$2;
      if [ "${moz_debugger}" != "" ]; then
shift 2
      else
        echo "-d requires an argument"
        exit 1
      fi
      ;;
    -a | --debugger-args)
      moz_debugger_args=$2;
      if [ "${moz_debugger_args}" != "" ]; then
shift 2
      else
        echo "-a requires an argument"
        exit 1
      fi
      ;;
    *)
      break;
      ;;
  esac
done
#
##
## Program name given in $1
##
if [ $# -gt 0 ]
then
MOZ_PROGRAM=$1
shift
fi
##
## Program not given, try to guess a default
##
if [ -z "$MOZ_PROGRAM" ]
then
##
## Try this script's name with '-bin' appended
##
if [ -x "$MOZ_DEFAULT_NAME" ]
then
MOZ_PROGRAM=$MOZ_DEFAULT_NAME
##
## Try mozilla-bin
##
elif [ -x "$MOZ_APPRUNNER_NAME" ]
then
MOZ_PROGRAM=$MOZ_APPRUNNER_NAME
fi
fi
#
#
##
## Make sure the program is executable
##
if [ ! -x "$MOZ_PROGRAM" ]
then
moz_bail "Cannot execute $MOZ_PROGRAM."
fi
#
##
## Set MOZILLA_FIVE_HOME
##
MOZILLA_FIVE_HOME=$MOZ_DIST_BIN

if [ -z "$MRE_HOME" ]; then
    MRE_HOME=$MOZILLA_FIVE_HOME
fi
##
## Set LD_LIBRARY_PATH
##
## On Solaris we use $ORIGIN (set in RUNPATH) instead of LD_LIBRARY_PATH
## to locate shared libraries.
##
## When a shared library is a symbolic link, $ORIGIN will be replaced with
## the real path (i.e., what the symbolic link points to) by the runtime
## linker.  For example, if dist/bin/libxul.so is a symbolic link to
## toolkit/library/libxul.so, $ORIGIN will be "toolkit/library" instead of "dist/bin".
## So the runtime linker will use "toolkit/library" NOT "dist/bin" to locate the
## other shared libraries that libxul.so depends on.  This only happens
## when a user (developer) tries to start firefox, thunderbird, or seamonkey
## under dist/bin. To solve the problem, we should rely on LD_LIBRARY_PATH
## to locate shared libraries.
##
## Note:
##  We test $MOZ_DIST_BIN/*.so. If any of them is a symbolic link,
##  we need to set LD_LIBRARY_PATH.
##########################################################################
moz_should_set_ld_library_path()
{
[ `uname -s` != "SunOS" ] && return 0
for sharedlib in $MOZ_DIST_BIN/*.so
do
[ -h $sharedlib ] && return 0
done
return 1
}
if moz_should_set_ld_library_path
then
LD_LIBRARY_PATH=${MOZ_DIST_BIN}:${MOZ_DIST_BIN}/plugins:${MRE_HOME}${LD_LIBRARY_PATH:+":$LD_LIBRARY_PATH"}
fi

if [ -n "$LD_LIBRARYN32_PATH" ]
then
LD_LIBRARYN32_PATH=${MOZ_DIST_BIN}:${MOZ_DIST_BIN}/plugins:${MRE_HOME}${LD_LIBRARYN32_PATH:+":$LD_LIBRARYN32_PATH"}
fi
if [ -n "$LD_LIBRARYN64_PATH" ]
then
LD_LIBRARYN64_PATH=${MOZ_DIST_BIN}:${MOZ_DIST_BIN}/plugins:${MRE_HOME}${LD_LIBRARYN64_PATH:+":$LD_LIBRARYN64_PATH"}
fi
if [ -n "$LD_LIBRARY_PATH_64" ]; then
LD_LIBRARY_PATH_64=${MOZ_DIST_BIN}:${MOZ_DIST_BIN}/plugins:${MRE_HOME}${LD_LIBRARY_PATH_64:+":$LD_LIBRARY_PATH_64"}
fi
#
#
## Set SHLIB_PATH for HPUX
SHLIB_PATH=${MOZ_DIST_BIN}:${MRE_HOME}${SHLIB_PATH:+":$SHLIB_PATH"}
#
## Set LIBPATH for AIX
LIBPATH=${MOZ_DIST_BIN}:${MRE_HOME}${LIBPATH:+":$LIBPATH"}
#
## Set DYLD_LIBRARY_PATH for Mac OS X (Darwin)
DYLD_LIBRARY_PATH=${MOZ_DIST_BIN}:${MRE_HOME}${DYLD_LIBRARY_PATH:+":$DYLD_LIBRARY_PATH"}
#
## Solaris Xserver(Xsun) tuning - use shared memory transport if available
if [ "$XSUNTRANSPORT" = "" ]
then
        XSUNTRANSPORT="shmem"
        XSUNSMESIZE="512"
        export XSUNTRANSPORT XSUNSMESIZE
fi

# Disable Gnome crash dialog
GNOME_DISABLE_CRASH_DIALOG=1
export GNOME_DISABLE_CRASH_DIALOG

if [ "$moz_debug" -eq 1 ]
then
  echo "MOZILLA_FIVE_HOME=$MOZILLA_FIVE_HOME"
  echo "  LD_LIBRARY_PATH=$LD_LIBRARY_PATH"
  if [ -n "$LD_LIBRARYN32_PATH" ]
  then
   echo "LD_LIBRARYN32_PATH=$LD_LIBRARYN32_PATH"
  fi
  if [ -n "$LD_LIBRARYN64_PATH" ]
  then
   echo "LD_LIBRARYN64_PATH=$LD_LIBRARYN64_PATH"
  fi
  if [ -n "$LD_LIBRARY_PATH_64" ]; then
   echo "LD_LIBRARY_PATH_64=$LD_LIBRARY_PATH_64"
  fi
  if [ -n "$DISPLAY" ]; then
       echo "DISPLAY=$DISPLAY"
  fi
  if [ -n "$FONTCONFIG_PATH" ]; then
echo "FONTCONFIG_PATH=$FONTCONFIG_PATH"
  fi
  if [ -n "$MOZILLA_POSTSCRIPT_PRINTER_LIST" ]; then
       echo "MOZILLA_POSTSCRIPT_PRINTER_LIST=$MOZILLA_POSTSCRIPT_PRINTER_LIST"
  fi
  echo "DYLD_LIBRARY_PATH=$DYLD_LIBRARY_PATH"
  echo "     LIBRARY_PATH=$LIBRARY_PATH"
  echo "       SHLIB_PATH=$SHLIB_PATH"
  echo "          LIBPATH=$LIBPATH"
  echo "       ADDON_PATH=$ADDON_PATH"
  echo "      MOZ_PROGRAM=$MOZ_PROGRAM"
  echo "      MOZ_TOOLKIT=$MOZ_TOOLKIT"
  echo "        moz_debug=$moz_debug"
  echo "     moz_debugger=$moz_debugger"
  echo "moz_debugger_args=$moz_debugger_args"
fi
#
export MOZILLA_FIVE_HOME LD_LIBRARY_PATH
export SHLIB_PATH LIBPATH LIBRARY_PATH ADDON_PATH DYLD_LIBRARY_PATH

if [ $moz_debug -eq 1 ]
then
moz_debug_program ${1+"$@"}
else
moz_run_program ${1+"$@"}
fi

exit $exitcode

是运行mozilla-bin吗？可我找不到有这个文件。