labath added a comment.

ABI plugins are one of the hardest things to test in lldb, particularly without 
actual hardware. That's why we've let them be added in the past without any 
accompanying tests. The situation is not ideal though, because we've 
accumulated various ABI plugins which are hard to change without breaking (or 
even to know if they work) because they only work with third-party (possibly 
proprietary) stubs.

I'm not sure what's the state of risc-v hardware these days and how much 
resources do you have available, but if it's at all possible, I'd definitely 
recommend adding the lldb-server bits for risc-v and adding a builtbot for 
testing this configuration.

Even if there's no hardware which could run the lldb test suite in a reasonable 
amount of time, the availability of an lldb-server implementation would enable 
anyone to test this via qemu -- that's the strategy we're pursuing for the ARM 
SVE stuff, and we're about to add instructions on how to run lldb+sve+qemu 
here: D82064 <https://reviews.llvm.org/D82064>.



================
Comment at: lldb/source/Plugins/ABI/RISCV/ABISysV_riscv.cpp:37-276
+enum riscv_dwarf_regnums {
+  dwarf_x0 = 0,
+  dwarf_x1,
+  dwarf_x2,
+  dwarf_x3,
+  dwarf_x4,
+  dwarf_x5,
----------------
It would be good to make this an MCBasedABI (that's a new concept, introduced 
after the inception of this patch). That should make all of this goo disappear.


================
Comment at: lldb/source/Utility/ArchSpec.cpp:460-463
+    {ArchSpec::eCore_riscv32, llvm::ELF::EM_RISCV, LLDB_INVALID_CPUTYPE,
+     0xFFFFFFFFu, 0xFFFFFFFFu}, // riscv32
+    {ArchSpec::eCore_riscv64, llvm::ELF::EM_RISCV, LLDB_INVALID_CPUTYPE,
+     0xFFFFFFFFu, 0xFFFFFFFFu}, // riscv64
----------------
These bits should go in as a part of D86292.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D62732/new/

https://reviews.llvm.org/D62732

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