Debug and Profiling - Status of Opensource Projects

This page aims to provide a overview of riscv support statuses in various debug & profiling related opensource projects. We can use below table for sync up, and get aligned understanding and planning for future work.

Projects classification	Tools	Support status in upstream (2024 June)	Features to be added/enhanced	2024 2H
Debugger	gdb	basic support OK. no watchpoint, the gdb simulator supports just a few exts (GC)	RVV reg dump? and dump of FP16/BF16 HW breakpoint and watchpoint	RVV reg dump, and dump of FP16/BF16. HW breakpoint and watchpoint
	lldb	basic support OK, how about advanced features?	?	?
	OpenOCD	RFP WIP
Perf Monitor	perf	yes, with SSCOFPMF suppoted; cycle/insnret CSR mmaped to U; based on SBI PMU	Smcdeleg (RFC sent), CTR (not ratified yet)
	gprof-ng	no, only support x86 and aarch64	priority?
	simpleperf	yes for most common events	raw events support, depending on Smcdeleg and Json config
Dynamic Binary Instrumentation	valgrind	Basic RV64 GC support in Petr's tree, not yet merged in main tree	First, help to reivew/fix issues to get GC merged. Then, RVV and other extensions	help fix and improve the RV64 GC port
Dynamic Binary Instrumentation	dynamoRIO	Basic GC support merged.	RVV instrumentation clients	RVV instrumentation clients
Compile-time Instrumentation	ASAN	yes	optimization with MTE (spec at early stage)
	MSAN	?
	TSAN	?
	PGO	yes
SW Tracing	bpftrace	yes for most events tracing, except for HW watchpoint	HW watchpoint? Dependency on debug spec?
	bcc	yes
	bpf JIT	yes, with C/Zba/Zbb based optimization	more JIT optimization (e.g. Zacas, RV32, etc)
	ftrace	yes
	SystemTAP	?
Perf CI on opensource projects	LKP, etc	just build check, no function/perf test and profiling	enable function/perf CI in LKP for riscv	enable function/perf CI
HW tracing	something like Tarmac	no project exists yet

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