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我按照本手册来使用 bashdb: http: //archive09.linux.com/articles/153383.html#commentthis 当我使用 bashdb 来 bt 脚本时:

#!/bin/bash

version="0.01";

fibonacci() {
    n=${1:?If you want the nth fibonacci number, you must supply n as the first parameter.}
    if [ $n -le 1 ]; then 
    echo $n
    else
    l=`fibonacci $((n-1))`
    r=`fibonacci $((n-2))`
    echo $((l + r))
    fi
}

for i in `seq 1 10`
do
  result=$(fibonacci $i)
  echo "i=$i result=$result"
done

这里是调试的细节: kaiwii@ubuntu:~/shell_test$ bash --debugger ./fibonacci.sh bashdb debugger, release 4.2-0.6

Copyright 2002, 2003, 2004, 2006, 2007, 2008, 2009, 2010 Rocky Bernstein
This is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.

(/home/kaiwii/shell_test/fibonacci.sh:3):
3:  version="0.01";
bashdb<0> bt
->0 in file `./fibonacci.sh' at line 3
##1 main() called from file `./fibonacci.sh' at line 0
bashdb<1> next
(/home/kaiwii/shell_test/fibonacci.sh:16):
16: for i in `seq 1 10`
bashdb<2> list
 11:        r=`fibonacci $((n-2))`
 12:        echo $((l + r))
 13:        fi
 14:    }
 15:    
 16: => for i in `seq 1 10`
 17:    do
 18:      result=$(fibonacci $i)
 19:      echo "i=$i result=$result"
 20:    done
bashdb<3> next
(/home/kaiwii/shell_test/fibonacci.sh:18):
18:   result=$(fibonacci $i)
bashdb<4> break fibonacci
Breakpoint 1 set in file /home/kaiwii/shell_test/fibonacci.sh, line 5.
bashdb<5> continue
i=1 result=1
i=2 result=1
i=3 result=2
i=4 result=3
i=5 result=5
i=6 result=8
i=7 result=13
i=8 result=21
i=9 result=34
i=10 result=55

我的问题是当我使用命令时,使用命令后继续,break fibonacci,它确实在方法的开头停止,fibonacci 而是退出脚本。

4

1 回答 1

3

这是 bashdb(4.2-0.8 及以下版本)在处理“break”命令时的一个错误。

“next”命令设置了一个标志,告诉 bash 跳过函数,而“break”命令并没有清除它。

git 源有修复,所以如果你可以使用它,这是获得修复的一种方法。

另一种方法是查找bashdb/lib/break.sh安装位置(假设它在 中/usr/share/lib/bashdb/lib/break.sh)并将下面的补丁保存在/tmp/bashdb.patch

--- bashdb/lib/break.sh
+++ bashdb/lib/break.sh
@@ -218,6 +218,11 @@ _Dbg_set_brkpt() {
     typeset dq_source_file
     dq_source_file=$(_Dbg_esc_dq "$source_file")
     typeset dq_condition=$(_Dbg_esc_dq "$condition")
+
+    # Make sure we are not skipping over functions.
+    _Dbg_old_set_opts="$_Dbg_old_set_opts -o functrace"
+    _Dbg_write_journal_eval "_Dbg_old_set_opts='$_Dbg_old_set_opts'"
+
     _Dbg_write_journal_eval "_Dbg_brkpt_line[$_Dbg_brkpt_max]=$lineno"
     _Dbg_write_journal_eval "_Dbg_brkpt_file[$_Dbg_brkpt_max]=\"$dq_source_file\""
     _Dbg_write_journal "_Dbg_brkpt_cond[$_Dbg_brkpt_max]=\"$dq_condition\""

然后以root身份运行:

 # cd /usr/share/lib
 # patch -p0 < /tmp/bashdb.patch
于 2012-03-06T11:01:12.317 回答