问题描述
我想使用 DS-5 Streamline Profiler 来分析我的代码。在其文档中提到要能够看到调用堆栈，我们需要使用编译器选项 -fno-omit-frame-pointer 来编译代码。此选项在gcc中。
还有clang的等效选项吗？
I want to use DS-5 Streamline profiler to profile my code. In the documentation its mentioned that to be able to see call stacks, we need to compile code with compiler option -fno-omit-frame-pointer. This option is there in gcc.Is there an equivalent option for clang also?
-fno-omit-frame-pointer 是
我也尝试将编译器优化级别设置为0，但仍然无法简化调用堆栈。
I have also tried setting the compiler optimization level to 0, but still I am not getting call stacks in streamline.
推荐答案
DS-5似乎是ARM的东西，因此可能不相关，但是我遇到了类似的问题，试图获得良好的堆栈使用Linux的来跟踪使用clang编译的可执行文件。
It looks like DS-5 is an ARM thing, so this might not be relevant, but I ran into a similar issue trying to get good stack traces out of a clang-compiled executable using Linux's perf profiler.
问题最终是，至少在x86-64 Linux上，Clang需要 -fno-omit-frame-pointer 和 -mno-omit-leaf-frame-pointer 以获得与gcc仅使用 -fno-omit-框架指针。看到以下LLVM错误：
The problem ended up being that, on x86-64 Linux at least, Clang requires both -fno-omit-frame-pointer and -mno-omit-leaf-frame-pointer in order to get the same behavior that gcc gives with only -fno-omit-frame-pointer. See this LLVM bug: "Need both -fno-omit-frame-pointer and -mno-omit-leaf-frame-pointer to get a fp on linux on a leaf function"
这篇关于-fno-omit-frame-pointer相当于clang的编译器选项的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！