gdb调试共享库<优化掉>问题
我正在尝试使用 gdb 来调试共享库，
当单步执行共享库中的函数时，我已经开始为所有局部变量（用 C 编写）获取
我'我尝试过链接到共享库（.so）链接到静态库（.a）确保Makefile中没有设置优化，即为库和库线束设置了-O0和-g
奇怪的事情我能够之前调试它，
我知道这是一个模糊的问题，还有各种进一步的问题我可能需要提供信息来对其进行排序，例如 Makefile、源代码等，但可能有人从这个高级描述中认识到问题并可以提供潜在的修复方案？
I'm trying to use gdb to debug a shared library
when stepping into the function in the shared library I've started getting <optimized out> for all the local variables (written in C)
I've tried linking to a shared library (.so) linking to a static library (.a) making sure no optimisations are set in the Makefiles, i.e. -O0 and -g is set for both the library and the library harness
The strange thing I was able to debug it previously, <optimized out> has only appeared recently but I have no idea why, e.g. I was able to see the local variable originally
I know this is a vague question and theres all sorts of further info I may need to provide to sort it, e.g. Makefiles, source code etc. but possibly someone recognises the problem from this high level description and can offer a potential fix?
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由于您已验证编译行中不存在
-O*标志（不要只查看Makefile，请检查实际 编译日志），逻辑结论是有人在系统的其他地方安装了不同（优化）版本的库，并且您正在链接到那个版本。在 Linux（和许多其他 UNIX 系统）上，您可以将
-Wl,-t标志添加到链接行，并查看链接时实际使用的库。当使用共享库时，GDB
info shared命令会告诉您在运行时选择了哪个库。The
<optimized out>can only appear when you debug optimized code.Since you've verified that no
-O*flags are present in your compile lines (don't just look in theMakefile, examine the actual compile log), the logical conclusion is that someone installed a different (optimized) version of your library somewhere else on the system, and that you are linking to that version.On Linux (and many other UNIX systems) you can add
-Wl,-tflag to your link line, and see which library is actually used at link time.When using a shared library, GDB
info sharedcommand will tell you which library is picked up at runtime.