Linux uses the perf tools to profile application. The linux 4.10 kernel added support for a perf jitdump format.

It has allows better JIT support for perf. Specifically allowing adding:

• native code so perf can show disassembly of JIT functions.
• adding debug info to support source line annotation.
• adding unwind info to better support stack unwind.

I believe this will also allow us to properly support ready to run images.

The app must

• create the jitdump file. Specification
• Inform perf inject of its presence by calling mmap with the filename.
• Add JIT_CODE_LOAD records
• Optionally add JIT_DEBUG_INFO records
• Optionally add JIT_CODE_UNWINDING_INFO records

It is used like this

perf record <app>
perf inject --jit
perf report

/cc @dotnet/dotnet-diag