我使用的是macOS High Sierra 10.13.6,无法将gdb转换为漂亮的打印容器或字符串。我按照GDB 7.6 STL pretty print with gcc-4.8 and mac os 10.9的说明进行操作,克隆了gdb漂亮打印机,并将路径添加到.gdbinit。但是gdb仍然不会打印出来。我在启动gdb之后添加了漂亮的打印机,以确保它们已注册
(gdb) python
>import sys
>sys.path.insert(0, '/Users/liamadams/Documents/gdb/python')
>from libstdcxx.v6.printers import register_libstdcxx_printers
>register_libstdcxx_printers (None)
>end
Traceback (most recent call last):
File "<string>", line 4, in <module>
File "/Users/liamadams/Documents/gdb/python/libstdcxx/v6/printers.py", line 1739, in register_libstdcxx_printers
gdb.printing.register_pretty_printer(obj, libstdcxx_printer)
File "/usr/local/Cellar/gdb/8.0.1/share/gdb/python/gdb/printing.py", line 152, in register_pretty_printer
printer.name)
RuntimeError: pretty-printer already registered: libstdc++-v6
gdb正在注册漂亮的打印机,我正在运行gcc 8.2.0和gdb 8.0.1。注册的漂亮打印机是c ++-v6,应该是v8吗?我克隆了此存储库以获得漂亮的打印机svn://gcc.gnu.org/svn/gcc/trunk/libstdc++-v3/python
我使用/usr/local/Cellar/gcc/8.2.0/bin/g++-8 -static-libstdc++ -g -o a.out b.o c.o -pthread
这是尝试打印字符串时的gdb输出
(gdb) p currentItem
$1 = {static npos = <optimized out>,
_M_dataplus = {<allocator<char>> = {<new_allocator<char>> = {<No data fields>}, <No data fields>}, _M_p = 0x7ffeefbff900 "mining"}, _M_string_length = 6, {
_M_local_buf = "mining\000\000\v\000\000\000\000\000\000",
_M_allocated_capacity = 113723912907117}}
(gdb) whatis currentItem
type = string
答案 0 :(得分:0)
这似乎是一个错误。此Stack Overflow问题中提供了一个骇客解决方案:
Bug in gdb libstdc++ pretty-printers with gcc 8 installed from macports (macOS)
从该问题复制后,您需要修改漂亮打印机代码:
--- python/libstdcxx/v6/printers.py.old 2018-10-13 13:57:11.000000000 +0300
+++ python/libstdcxx/v6/printers.py 2018-10-13 14:35:55.000000000 +0300
@@ -1306,2 +1306,4 @@
def add(self, name, function):
+ if (name.startswith('std::')):
+ self.add(name[5:], function)
# A small sanity check.
答案 1 :(得分:0)
尝试使用 -gdwarf-3
而不是简单的 -g
进行编译。根据 https://gcc.gnu.org/onlinedocs/gcc/Debugging-Options.html,GCC 在 macOS 上默认为 DWARF 版本 2,并且明确切换到 DWARF 版本 3 会使符号正确出现在 std::
命名空间中(我还不明白为什么)。因此,您无需像 Yongwei Wu 建议的那样修补漂亮的打印机。