什么是Linux相当于MSVC ++的选项/ d1reportSingleClassLayout? [英] What is the Linux equivalent to MSVC++'s option /d1reportSingleClassLayout?
问题描述
我正在开发到Linux,但我不能找到我可以得到类似于/ d1reportSingleClassLayout从MSVC ++在g ++或clang ++下的输出。如果这些编译器没有这样的功能,是否有一个外部工具提供类似的可视化?
I am moving development to Linux but I couldn't find how I can get an output similar to /d1reportSingleClassLayout from MSVC++ under g++ or clang++. If these compiler do not have such a feature, is there an external tool that provides similar visualization?
推荐答案
文件的调试信息( -g
选项),然后使用 pahole
显示结构布局。 pahole
通常可从 dwarves
包(来源; 在GitHub上< a>; 在Ubuntu )。
You need to compile the file with debugging information (-g
option) then use pahole
to display the struct layout. pahole
is usually available from the dwarves
package (source; on GitHub; in Ubuntu).
$ g++ -ggdb -c -o myfile.o myfile.cpp
$ pahole -C MyClass myfile.o
class MyClass {
public:
int ()(void) * * _vptr.MyClass; /* 0 4 */
int i; /* 4 4 */
const char * c; /* 8 4 */
void MyClass(class MyClass *, const class MyClass &);
void MyClass(class MyClass *);
virtual void ~MyClass(class MyClass *, int);
/* size: 12, cachelines: 1, members: 3 */
/* last cacheline: 12 bytes */
};
-C
选项可让您选择类/结构体检查。
The -C
option lets you select which class/struct to examine.
如果你没有访问 pahole
,你可以得到相同的信息从 readelf -wi myfile.o
或 eu-readelf -winfo myfile.o
中可读的形式。本文 https://www.kernel.org/doc /ols/2007/ols2007v2-pages-35-44.pdf 描述 pahole
与其他 dwarves
工具。
If you don't have access to pahole
you can get the same information in a much less readable form from readelf -wi myfile.o
or eu-readelf -winfo myfile.o
. The paper https://www.kernel.org/doc/ols/2007/ols2007v2-pages-35-44.pdf describes pahole
alongside other dwarves
tools.
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