lldb - 如何在LLDB中列出更多行代码

Question

如何让 LLDB 在当前帧中列出更多代码行。默认情况下它只做 7 个。这是迄今为止我能做的最好的:

(lldb) f
frame #9: 0x000000010001fce0 DualIssueInstructionSchedulerTest`void std::__1::random_shuffle<std::__1::__wrap_iter<exchange::ExchangeMessage*>, ExchangeWithLotsOfMessages::test_method()::$_5&>(__first=__wrap_iter<exchange::ExchangeMessage *> @ 0x00007ffeefbf5298, __last=__wrap_iter<exchange::ExchangeMessage *> @ 0x00007ffeefbf5290, __rand=0x00007ffeefbf56e0)::$_5&&&) at algorithm:3203
   3200         for (--__last; __first < __last; ++__first, --__d)
   3201         {
   3202             difference_type __i = __rand(__d);
-> 3203             swap(*__first, *(__first + __i));
   3204         }
   3205     }
   3206 }
(lldb) l 3100
   3100     result_type max() const {return b();}
   3101
   3102     friend bool operator==(const uniform_int_distribution& __x,
   3103                            const uniform_int_distribution& __y)
   3104         {return __x.__p_ == __y.__p_;}
   3105     friend bool operator!=(const uniform_int_distribution& __x,
   3106                            const uniform_int_distribution& __y)
   3107             {return !(__x == __y);}
   3108 };
   3109
(lldb) l
   3110 template<class _IntType>
   3111 template<class _URNG>
   3112 typename uniform_int_distribution<_IntType>::result_type
   3113 uniform_int_distribution<_IntType>::operator()(_URNG& __g, const param_type& __p)
   3114 {
   3115     typedef typename conditional<sizeof(result_type) <= sizeof(uint32_t),
   3116                                             uint32_t, uint64_t>::type _UIntType;
   3117     const _UIntType _Rp = __p.b() - __p.a() + _UIntType(1);
   3118     if (_Rp == 1)
   3119         return __p.a();
(lldb) l
   3120     const size_t _Dt = numeric_limits<_UIntType>::digits;
   3121     typedef __independent_bits_engine<_URNG, _UIntType> _Eng;
   3122     if (_Rp == 0)
   3123         return static_cast<result_type>(_Eng(__g, _Dt)());
   3124     size_t __w = _Dt - __clz(_Rp) - 1;
   3125     if ((_Rp & (std::numeric_limits<_UIntType>::max() >> (_Dt - __w))) != 0)
   3126         ++__w;
   3127     _Eng __e(__g, __w);
   3128     _UIntType __u;
   3129     do
(lldb) l
   3130     {
   3131         __u = __e();
   3132     } while (__u >= _Rp);
   3133     return static_cast<result_type>(__u + __p.a());
   3134 }
   3135
   3136 #if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE) \
   3137   || defined(_LIBCPP_BUILDING_LIBRARY)
   3138 class _LIBCPP_TYPE_VIS __rs_default;
   3139

有没有办法增加 f 的上下文或将 range 行添加到 l？

Answer 1

如果您只想扩大一个来源列表的窗口，请执行以下操作:

(lldb) source list -c 40 -l 3100

然后只需按回车键(自动重复命令)将继续此计数。

还有两个 lldb 设置可以控制打印源的默认值:

(lldb) help settings set
...
  stop-line-count-after        -- The number of sources lines to display that come after the current source line when displaying a stopped context.
  stop-line-count-before       -- The number of sources lines to display that come before the current source line when displaying a stopped context.

如果您正在查看停止列表，“当前源代码行”是 pc，如果您正在使用该命令，则传递给“list”的源代码行。

对“l”的重复调用(或只是按下自动重复)将只打印两个行数的总和。所以你会说:

settings set stop-line-count-before 10
settings set stop-line-count-after 10

或您喜欢在 ~/.lldbinit 中的任何数字来更改此行为。