On Thu, Jun 12, 2025 at 02:44:18PM -0700, Andrii Nakryiko wrote: > On Tue, Jun 10, 2025 at 6:03 PM Steven Rostedt <rost...@goodmis.org> wrote: > > > > > > Hi Peter and Ingo, > > > > This is the first patch series of a set that will make it possible to be > > able > > to use SFrames[1] in the Linux kernel. A quick recap of the motivation for > > doing this. > > > > Currently the only way to get a user space stack trace from a stack > > walk (and not just copying large amount of user stack into the kernel > > ring buffer) is to use frame pointers. This has a few issues. The biggest > > one is that compiling frame pointers into every application and library > > has been shown to cause performance overhead. > > > > Another issue is that the format of the frames may not always be consistent > > between different compilers and some architectures (s390) has no defined > > format to do a reliable stack walk. The only way to perform user space > > profiling on these architectures is to copy the user stack into the kernel > > buffer. > > > > SFrames is now supported in gcc binutils and soon will also be supported > > by LLVM. SFrames acts more like ORC, and lives in the ELF executable > > Is there any upstream PR or discussion for SFrames support in LLVM to > keep track of?
https://github.com/llvm/llvm-project/issues/64449 -- Josh
