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valgrind-riscv64's Issues

riscv vector ISA support

@paulfloyd @petrpavlu
We consider to add RVV/Vector feature in valgrind and met some issues from investigation.

RVV like ARM's SVE programming model, it's scalable/VLA, that means the vector length is agnostic.
ARM's SVE is not supported in valgrind :(

There is not any VLA vector IR to represent these vector model, it's the big issue.
Also some other common module like "register allocator" in VEX can not represent vector type which use
more than one register.
In another hand, some tool plugin like Memcheck will use data type like "Ity_V128/Ity_V256" to generate IRs, it's a big challenge

Any ideas for supporting of scalable vector model ?

Prepare for upstream?

Hi,
Amazing work!
Do we have a plan to let Valgrind upstream merge this feature?
If there are need help with real riscv64 hardware resources, please let me know.
Thanks again for your great work~

Regtest fails on FreeBSD amd64

First, I get these

memcheck/tests/riscv64-linux/context_float (stdout)
memcheck/tests/riscv64-linux/context_float (stderr)
memcheck/tests/riscv64-linux/context_integer (stdout)
memcheck/tests/riscv64-linux/context_integer (stderr)
memcheck/tests/riscv64-linux/scalar      (stderr)
...
Unknown directory 'riscv64'. Please update check_headers_and_includes

I also get 2 new failures

memcheck/tests/leak-segv-jmp (stderr)

That looks like a line number change due to added RISCV64 code in the .c file and the expected needs updating.

none/tests/libvexmultiarch_test (stderr)

paulf> cat none/tests/libvexmultiarch_test*diff
--- libvexmultiarch_test.stderr.exp     2023-01-29 09:36:06.883182000 +0100
+++ libvexmultiarch_test.stderr.out     2023-01-29 10:16:07.617645000 +0100
@@ -0,0 +1 @@
+valgrind: ./libvexmultiarch_test: No such file or directory

I see that this is marked as 'disable for now'. As a quick fix you could put in the .vgtest

prereq: ! ../../test/arch_test riscv64

Build warnings

Building on FreeBSD amd64 with clang13 I get

priv/guest_riscv64_helpers.c:256:9: warning: unused variable 'rm_RISCV' [-Wunused-variable]
priv/guest_riscv64_helpers.c:261:9: warning: unused variable 'rm_RISCV' [-Wunused-variable]
priv/guest_riscv64_helpers.c:266:9: warning: unused variable 'rm_RISCV' [-Wunused-variable]
priv/guest_riscv64_helpers.c:271:9: warning: unused variable 'rm_RISCV' [-Wunused-variable]
priv/guest_riscv64_helpers.c:276:9: warning: unused variable 'rm_RISCV' [-Wunused-variable]
priv/guest_riscv64_helpers.c:281:9: warning: unused variable 'rm_RISCV' [-Wunused-variable]
priv/guest_riscv64_helpers.c:286:9: warning: unused variable 'rm_RISCV' [-Wunused-variable]
priv/guest_riscv64_helpers.c:291:9: warning: unused variable 'rm_RISCV' [-Wunused-variable]
priv/guest_riscv64_helpers.c:296:9: warning: unused variable 'rm_RISCV' [-Wunused-variable]
priv/guest_riscv64_helpers.c:301:9: warning: unused variable 'rm_RISCV' [-Wunused-variable]

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