rails debugger 几个命令

Info

显示相关信息

• info args # Argument variables of current stack frame

     [7, 16] in /Users/wanghao/Work/common_divisor.rb  
     7      if(x < y)  
     8        return  gcd2(y , x)  
     9      elsif(y == 0)  
     10        return x  
     11      else  
  => 12        return gcd2(x - y , y)  
     13      end  
     14    end  
     15
     16    def gcd3(x ,y)  
  (rdb:1) info args  
  x = 1071  
  y = 462  
  (rdb:1) show line  
  line tracing is off  
  (rdb:1) info line  
  Line 12 of "/Users/wanghao/Work/common_divisor.rb"  
  (rdb:1) info stack  
  --> #0 CommonDivisor.gcd2(x#Fixnum,...)  
         at line /Users/wanghao/Work/common_divisor.rb:12  
      #1  at line /Users/wanghao/Work/common_divisor.rb:52  
  

• info breakpoints # 显示当前所有断点的状态

  (rdb:1) info breakpoints
    Num Enb What
    1   y   at /Users/wanghao/Work/common_divisor.rb:51
    2   y   at /Users/wanghao/Work/common_divisor.rb:51
    3   y   at /Users/wanghao/Work/common_divisor.rb:3
  

• info catch # 可以被捕获的Exceptions,通过catch命令设定

• info display # 程序结束时的输出

• info file # 关于读取文件的内容

• info files # 关于读取文件的时间和名字等信息

• info global_variables # 所有全局变量

• info instance_variables # 当前frame的示例变量

• info line # 当前文件的当前行有关信息

      [4, 13] in /Users/wanghao/Work/common_divisor.rb
      4    end
      5
      6    def gcd2(x , y)
      7      if(x < y)
      8        return  gcd2(y , x)
   => 9      elsif(y == 0)  
     10        return x
     11      else
     12        return gcd2(x - y , y)
     13      end  
     (rdb:1) info line
      Line 9 of "/Users/wanghao/Work/common_divisor.rb"
      (rdb:1) info stack
      --> #0 CommonDivisor.gcd2(x#Fixnum,...)
      at line /Users/wanghao/Work/common_divisor.rb:9
      #1  at line /Users/wanghao/Work/common_divisor.rb:52
  

• info locals # 局部变量信息

  (rdb:1) info locals
      x = 1071
      y = 462
  

• info program # 程序执行状态信息

• info stack # 相关stack信息

  (rdb:1) info stack
  --> #0 CommonDivisor.gcd(x#Fixnum,...)
      at line /Users/wanghao/Work/common_divisor.rb:3
  #1 CommonDivisor.gcd(x#Fixnum,...)
      at line /Users/wanghao/Work/common_divisor.rb:3
  #2  at line /Users/wanghao/Work/common_divisor.rb:51
  

• info thread # Thread相关信息

• info threads # Thread相关信息
  (rdb:1) info threads
  + 1 #<Thread:0x007fc7ab0677a8 run> /Users/wanghao/Work/common_divisor.rb:3
  !2 #<Debugger::DebugThread:0x007fc7ab364b40 sleep>

• info variables # 局部变量示例变量信息

  self = ...  
  x = 462  
  y = 147  
  

Set

设定ruby-debug的环境，Boolean变量可以设定为on off或者1 0 设定变量可以用show显示

• set annotate # 设定注释等级

• set args # 设定变量列表,用来传递给运行环境

• set autoeval # 在不能直接输出的表达式,进行eval计算

    (rdb:1) set autoeval 0
     autoeval is off
    (rdb:1) fib2
    *** Unknown command: "fib2".  Try "help".
    (rdb:1) fib1
    *** Unknown command: "fib1".  Try "help".
    (rdb:1)
    (rdb:1) fib1=0\; fib2=1\; 5.times {|temp| temp=fib1\; fib1=fib2\; fib2 += temp }
    *** Unknown command: "fib1=0; fib2=1; 5.times {|temp| temp=fib1; fib1=fib2; fib2 += temp }".  Try "help".
    (rdb:1) set autoeval 1
    autoeval is on
    (rdb:1) fib1=0\; fib2=1\; 5.times {|temp| temp=fib1\; fib1=fib2\; fib2 += temp }
    5
    (rdb:1) fib1
    5
    (rdb:1) fib2
    8
  

• set autolist # 在每个breakpoint时执行list

• set autoirb # 任何时候只要stop则执行irb

• set autoreload # 当代码有修改的时候,从新load

• set basename # 设定basename只显示文件名

• set callstyle # 设定显示变量格式

• set debuggertesting # 用于测试debugger自身

• set forcestep # 保证'next/step'命令总是能向新行移动

• set fullpath # 在frames中显示文件的完整路径名

• set history # Generic command for setting command history parameters

• set keep-frame-bindings # Save frame binding on each call

• set linetrace+ # Set line execution tracing to show different lines

• set linetrace # Set line execution tracing

• set listsize # Set number of source lines to list by default

• set trace # Display stack trace when 'eval' raises exception

• set width # Number of characters the debugger thinks are in a line

Thread

用于线程操作

th[read] l[ist] # 列出所有的线程
th[read] stop <nnn> # 停止指定线程
th[read] resume <nnn> # 恢复指定线程
th[read] [sw[itch]] <nnn> # 切换执行环境到指定线程
th[read] [cur[rent]] # 显示当前线程

Trace

tr[ace] (on|off) set trace mode of current thread
tr[ace] (on|off) all set trace mode of all threads