对-fno-omit-frame-pointer 和-fsanitize 选项的解释 1. -fno-omit-frame-pointer 选项的作用 -fno-omit-frame-pointer 是GCC 编译器的一个选项,用于指示编译器不要省略帧指针(frame pointer)。在默认情况下,为了优化性能,编译器可能会省略帧指针,因为这样可以减少寄存器的使用,提高程序的运行速度。但是,在某些情...
omit-frame-pointer 开启该选项,主要是用于去掉所有函数SFP(Stack Frame Pointer)的,即在函数调用时不保存栈帧指针SFP,代价是不能通过backtrace进行调试根据堆栈信息了。通过去掉SFP,可以提高程序运行速度,达到优化程序的目的。如果要打开栈指针,使用-fno-omit-frame-pointer。 另外一个类似选项-fomit-leaf-frame-pointer...
GCC手册[1]里对-fomit-frame-pointer的说明: Omit the frame pointer in functions that don’t need one. This avoids the instructions to save, set up and restore the frame pointer; on many targets it also makes an extra register available. On some targets this flag has no effect because the ...
Now redis use O3 level optimization that would remove the frame pointer in the target bin. In the very old past, when gcc optimized at O1 and above levels, the frame pointer is deleted by default to improve performance. This saves the RS...
some implementation notes:https://gitlab.archlinux.org/daandemeyer/rfcs/-/blob/fp/rfcs/0026-fno-omit-frame-pointer.rst tl;dr: profiling stuff using dwarf backtraces is often quite unreasonable,https://rwmj.wordpress.com/2023/02/14/frame-pointers-vs-dwarf-my-verdict/is quite funny. having ...
BOOM } # Compile and link % clang++ -O1 -g -fsanitize=address -fno-omit-frame-pointer ...
2. gcc/g++默认不优化,能看到全部symbol,若优化,则被优化的symbol看不到3. 工具要在主程序退出之前退出,否则全是unknown symbol4. 若线程只有一次sleep调用,不保证一定抓取到,抓到的前提是工具在程序在sleep前已经ready了。如果程序循环sleep,则更容易被抓到5. -fno-omit-frame-pointer 的作用待验证6. 参考...
re basically losing all the functionality and flexibility that programming languages allow.Pointer is ...
正如你已经暗示的那样，在你的情况下，-fno-omit-frame-pointer被忽略了，因为在默认的-O0中不会省略...
Since then some have already questioned FESCo and are trying to bring up this change proposal yet again but it doesn't appear that will go through at least in the near-term. The debating over this -fno-omit-frame-pointer behavior for Fedora can be found viathis FESCo issue ticket....