#13462 Added basic support for generating the Linux perf jitdump format. The initial implementation did not include support for adding:

• Debug info - JIT_CODE_DEBUG_INFO. Provide assembly to line number info to improve annotation.
• Unwinding info - JIT_CODE_UNWINDING_INFO. Adds dwarf unwind info. This allows/improves recording with the --callgraph dwarf option.

Consider adding these records to improve value of perf jitdump support.

Implementation Notes:

• JIT_CODE_DEBUG_INFO & JIT_CODE_UNWINDING_INFO each apply to the next JIT_CODE_LOAD record. This means to properly support multithreading, the information needs to be provide when generating the JIT_CODE_LOAD record

• The FEATURE_GDBJIT probably already needs similar info to construct the elf files it passes to gdb. src/vm/gdbjit.cpp may be instructive.