忽略全局覆盖的新/删除 [英] Ignore globally overridden new/delete

问题描述

我正在使用一个全局覆盖了new/delete的库.但是我对该库有问题，问题在于必须在主函数中手动对其进行初始化.

Hi I'm using a library that has globally overridden new/delete. But I have a problem with this library, the problem is that it has to be manually initialized in the main function.

现在，我正在尝试使用另一个在调用main之前初始化一些函数的库，不幸的是，该库在这些函数中使用了new.因此出现错误是因为使用覆盖的new/delete关键字的内存管理器尚未初始化.

Now I'm trying to use another library that initializes a few functions before main is called, unfortunately this library uses new within these functions. So I get errors because the memory manager that uses the overridden new/delete keywords are not initialized yet.

我真的很想使用默认的内存管理器，因为我想向该库添加单元测试.使用我要测试的库以及单元测试库使用的内存并没有多大意义.

I'd really like to use the default memory manager because I want to add unit testing to this library. It would not make much sense to use the memory used my the library I want to test also used by my Unit Testing library.

所以我的问题是，包括第二个库时是否可以忽略全局覆盖的new/delete，而仅使用默认的new/delete?

So my question is if it's possible to ignore global overridden new/delete when including the second library and just use the default new/delete?

我正在Windows 7和标准C ++编译器上使用Visual Studio 2010.

I'm using visual studio 2010 on Windows 7 with the standard C++ compiler.

推荐答案

如果不修改库本身，我认为这是不可能的.我猜这是关于静态库的(在dll中，被dll内部的函数指向的是覆盖的new/delete.)

I do not think this is possible without modifying the library itself. I guess it is about a static library (inside a dll, the overridden new/delete will be pointed by the functions inside the dll.)

您可以使用命令(Visual命令提示符)从静态库中删除obj文件:

You can remove an obj file from a static library by using the command (Visual command prompt):

  LIB /REMOVE:obj_to_remove /OUT:removed.lib input.lib

要找出要删除的obj，请先运行:

To find out what obj to remove, first run:

  DUMPBIN /ARCHIVEMEMBERS input.lib

您将看到诸如

    Archive member name at 14286: /0  compilation.dir\objfile1.obj

14286'标识'obj文件.要查看每个符号的位置，请运行:

14286 'identifies' the obj file. To see where each symbol is, run:

 DUMPBIN /LINKERMEMBER:1 input.lib > members.txt

并查找新的/删除的. members.txt将包含每个符号的错误名称和该符号所在的obj的标识符.例如

and look for the new/delete. members.txt will contains the mangled names of each symbols and an identifier of the obj in which this symbol is. For instance

    14286 ?_Rank@?$_Arithmetic_traits@C@std@@2HB

14286告诉您符号所在的obj'identifier'.如果找不到新的/删除的，可以运行:

The 14286 is telling you the obj 'identifier' in which the symbol lies. If you have trouble finding new/delete, you can run:

 DUMPBIN /SYMBOLS input.lib > sym.txt

，这将冲刷到sym.txt每个符号的变形和未破坏的名称中.

which will flush into sym.txt the mangled and unmangled names for each symbol.

最后，在我们的示例中，将obj_to_remove替换为compilation.dir\objfile1.obj，并使用上述LIB命令删除obj文件，然后链接到removed.lib.

At the end, remove the obj file with the LIB command above by replacing obj_to_remove by compilation.dir\objfile1.obj in our example, and link against removed.lib.

现在，如果您不走运，则所需的其他符号可能与新建/删除对象位于同一目标文件中.在这种情况下，您可以使用 this (例如将new重命名为dew，将delete重命名为nelete.)

Now, if you are not lucky, other symbols you need may be in the same object file as the new/delete. In that case, you can "hack" the lib using something like this (say renaming new to dew and delete to nelete.)

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