漂亮的打印boost :: mpl :: string< ...> gdb中的类型

时间:2013-09-04 02:53:38

标签: c++ boost gdb metaprogramming boost-mpl

我广泛使用boost::mpl::string<...>类型......足以让真正帮助调试,以便在gdb中打印漂亮的类型。

所以...而不是gdb显示当前的个别(多字符文字)组件......

boost::mpl::string<1668248165, 778856802, 778858343, ..., ..., 0, 0, 0, 0, 0, 0>

它会显示等效的字符串值而不是......

boost::mpl::string<"The way out is through">

我已经看到gdb宏和python脚本用于在gdb中打印漂亮的STL容器,但我找不到一个用于打印漂亮的boost::mpl字符串。任何人都可以帮忙吗?


更新:我添加了 +100 赏金......我正在寻找一种利用最新GDB支持通过python进行漂亮打印的解决方案(如描述here用于STL容器。)

1 个答案:

答案 0 :(得分:7)

以下是我使用Boost-Pretty-Printer(https://github.com/ruediger/Boost-Pretty-Printer/wiki)的解决方案:

文件mpl_printers.py:

import printers
import re
import string
import struct

@printers.register_pretty_printer
class BoostMplString:
    "Pretty Printer for boost::mpl::string"
    regex = re.compile('^boost::mpl::string<(.*)>$')

    @printers.static
    def supports(typename):
        return BoostMplString.regex.search(typename)

    def __init__(self, typename, value):
        self.typename = typename
        self.value = value

    def to_string(self):
            s = ''
            try:
                m = BoostMplString.regex.match(self.typename)
                args = string.split(m.group(1), ', ')
                for packed in args: 
                    i = int(packed)
                    if i == 0: 
                        break
                    r = ''
                    while i != 0:
                        i, c = divmod(i, 0x100)
                        r += chr(c)
                    s += r[::-1]
            except RuntimeError:
                s = '[Exception]'
            return '(boost::mpl::string) %s' % (s)

def register_boost_mpl_printers(obj):
    "Register Boost Pretty Printers."
    pass

文件register_printers.gdb:

python

# Add the following line in your .gdbinit:
# source /usr/local/share/gdb/register_printers.gdb

import sys
sys.path.insert(0, '/usr/local/share/gdb/python')
# You might have these, too
# from libstdcxx.v6.printers import register_libstdcxx_printers
from boost.printers import register_boost_printers
from boost.mpl_printers import register_boost_mpl_printers

# register_libstdcxx_printers(None)
register_boost_printers(None)
register_boost_mpl_printers(None)

end
  • 在目录中安装printers.py和上面的mpl_printers.py 的/ usr /本地/共享/ GDB /蟒/升压。
  • 确保/ usr / local / share / gdb / python / boost中有__init__.py(空文件会这样做)
  • 安装以上内容 / usr / local / share / gdb中的'register_printers.gdb'。
  • 在.gdbinit
  • 中添加'source /usr/local/share/gdb/register_printers.gdb'

(您可以选择不同的目录)

测试:

#include <boost/mpl/string.hpp>
int main() {
    boost::mpl::string<'hell','o wo','rld'> s;
    return 0;
}

gdb测试-ex'b main'-ex'r'-ex'p s'-ex'c'-ex'q'

$ 1 =(boost :: mpl :: string)hello world