什么说明这些函数的名称中的点

Question

我在调试为什么我的Boost.Python模块不会在Ubuntu中加载。有趣的是，问题出现在我的模块实际加载之前。一个简单的foo C++模块证实了这一点。堆栈跟踪显示对boost::python::*的调用，这些调用在我们较大的lib中不存在。因此，我知道seg模块故障发生在模块尝试之前。

下面的堆栈跟踪是针对发生段错误的失败库。我的问题是，函数名称中有哪些点？并非所有的功能都有它们。例如，框架#62 0x0000000000547692 in PyErr_PrintEx.part.3.42666()。我可以通过Python源代码找到PyErr_PrintEx，但我没有找到其余的。那是什么？

#0 0x0000000002344596 in ??() 
No symbol table info available. 
#1 0x00007f5f02d72258 in std::string::_S_construct<char const*> (__beg= 
    0x7f5efb565f46 "amd64", __end=0x7f5efb565f4b "", __a=...) 
    at /usr/include/c++/4.6/bits/basic_string.tcc:134 
     __dnew = 116 
     __r = 0x7 
#2 0x00007f5efdf505e3 in std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(char const*, std::allocator<char> const&)() 
    from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 
No symbol table info available. 
#3 0x00007f5efb4ebdfe in pkgInitConfig(Configuration&)() 
    from /usr/lib/x86_64-linux-gnu/libapt-pkg.so.4.12 
No symbol table info available. 
#4 0x00007f5efb7aa395 in ??() 
    from /usr/lib/python2.7/dist-packages/apt_pkg.so 
No symbol table info available. 
#5 0x000000000056d4a4 in PyEval_EvalFrameEx() 
No locals. 
#6 0x00000000005747c0 in PyEval_EvalCodeEx() 
No locals. 
#7 0x0000000000568e58 in PyImport_ExecCodeModuleEx() 
No locals. 
#8 0x000000000042bf11 in load_source_module.39049() 
No locals. 
#9 0x0000000000566f80 in load_package.39142() 
No locals. 
#10 0x000000000042c90b in import_submodule.39103() 
No locals. 
#11 0x000000000046895d in load_next.39108() 
No locals. 
#12 0x000000000042d164 in import_module_level.isra.3.39129() 
No locals. 
#13 0x00000000005167db in builtin___import__.32784() 
No locals. 
#14 0x000000000043a8b6 in PyObject_Call() 
No locals. 
#15 0x000000000043b626 in PyEval_CallObjectWithKeywords() 
No locals. 
#16 0x000000000056f95b in PyEval_EvalFrameEx() 
No locals. 
#17 0x00000000005747c0 in PyEval_EvalCodeEx() 
No locals. 
#18 0x0000000000568e58 in PyImport_ExecCodeModuleEx() 
No locals. 
#19 0x000000000042bf11 in load_source_module.39049() 
No locals. 
#20 0x000000000042c90b in import_submodule.39103() 
No locals. 
#21 0x00000000004688d3 in load_next.39108() 
No locals. 
#22 0x000000000042d326 in import_module_level.isra.3.39129() 
No locals. 
#23 0x00000000005167db in builtin___import__.32784() 
No locals. 
#24 0x000000000043a8b6 in PyObject_Call() 
No locals. 
#25 0x000000000043b626 in PyEval_CallObjectWithKeywords() 
No locals. 
#26 0x000000000056f95b in PyEval_EvalFrameEx() 
No locals. 
#27 0x00000000005747c0 in PyEval_EvalCodeEx() 
No locals. 
#28 0x0000000000568e58 in PyImport_ExecCodeModuleEx() 
No locals. 
#29 0x000000000042bf11 in load_source_module.39049() 
No locals. 
#30 0x000000000042c90b in import_submodule.39103() 
No locals. 
#31 0x00000000004688d3 in load_next.39108() 
No locals. 
#32 0x000000000042d326 in import_module_level.isra.3.39129() 
No locals. 
#33 0x00000000005167db in builtin___import__.32784() 
No locals. 
#34 0x000000000043a8b6 in PyObject_Call() 
No locals. 
#35 0x000000000043b626 in PyEval_CallObjectWithKeywords() 
No locals. 
#36 0x000000000056f95b in PyEval_EvalFrameEx() 
No locals. 
#37 0x00000000005747c0 in PyEval_EvalCodeEx() 
No locals. 
#38 0x0000000000568e58 in PyImport_ExecCodeModuleEx() 
No locals. 
#39 0x000000000042bf11 in load_source_module.39049() 
No locals. 
#40 0x000000000042c90b in import_submodule.39103() 
No locals. 
#41 0x00000000004688d3 in load_next.39108() 
No locals. 
#42 0x000000000042d326 in import_module_level.isra.3.39129() 
No locals. 
#43 0x00000000005167db in builtin___import__.32784() 
No locals. 
#44 0x000000000043a8b6 in PyObject_Call() 
No locals. 
#45 0x000000000043b626 in PyEval_CallObjectWithKeywords() 
No locals. 
#46 0x000000000056f95b in PyEval_EvalFrameEx() 
No locals. 
#47 0x00000000005747c0 in PyEval_EvalCodeEx() 
No locals. 
#48 0x0000000000568e58 in PyImport_ExecCodeModuleEx() 
No locals. 
#49 0x000000000042bf11 in load_source_module.39049() 
No locals. 
#50 0x0000000000566f80 in load_package.39142() 
No locals. 
#51 0x000000000042c90b in import_submodule.39103() 
No locals. 
#52 0x00000000004688d3 in load_next.39108() 
No locals. 
#53 0x000000000042d164 in import_module_level.isra.3.39129() 
No locals. 
#54 0x00000000005167db in builtin___import__.32784() 
No locals. 
#55 0x000000000043a8b6 in PyObject_Call() 
No locals. 
#56 0x000000000043b626 in PyEval_CallObjectWithKeywords() 
No locals. 
#57 0x000000000056f95b in PyEval_EvalFrameEx() 
No locals. 
#58 0x00000000005747c0 in PyEval_EvalCodeEx() 
No locals. 
#59 0x00000000005697b0 in function_call() 
No locals. 
#60 0x000000000043a8b6 in PyObject_Call() 
No locals. 
#61 0x000000000043b626 in PyEval_CallObjectWithKeywords() 
No locals. 
#62 0x0000000000547692 in PyErr_PrintEx.part.3.42666() 
No locals. 
#63 0x000000000056ae1f in PyRun_InteractiveOneFlags() 
No locals. 
#64 0x000000000056b155 in PyRun_InteractiveLoopFlags() 
No locals. 
#65 0x000000000056bedc in Py_Main() 
No locals. 
#66 0x00007f5f04ae576d in __libc_start_main (main=0x41bae0 <main>, argc=1, 
    ubp_av=0x7fff11b14a38, init=<optimized out>, fini=<optimized out>, 
    rtld_fini=<optimized out>, stack_end=0x7fff11b14a28) at libc-start.c:226 
     result = <optimized out> 
     unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, 8540347331300905646, 
       4307688, 140733490219568, 0, 0, -8540148959998029138, 
       -8630196532358589778}, mask_was_saved = 0}}, priv = {pad = { 
    0x0, 0x0, 0x57d430, 0x7fff11b14a38}, data = {prev = 0x0, cleanup = 0x0, 
       canceltype = 5755952}}} 
     not_first_call = <optimized out> 
#67 0x000000000041bb11 in _start() 
No locals. 

Answer 1

.part表格来自GCC优化。 GCC有时会将一个功能分成多个部分，以便更好地内嵌一个部分。

例如，一个函数可能有一个测试，导致一个快速案例和一个慢速案例。在这种情况下，GCC可以选择将测试和快速案例放入一个小的可嵌入函数中，然后将该慢速案例放入一个.part函数中。这样快速路径可以内联到呼叫者。