[Lldb-commits] [lldb] [llvm] [lldb] Extended if conditions to support alias names for registers (PR #124475)

[via lldb-commits]

kper wrote:

Thank you for detailed explanations and sorry for the delay.
I needed almost a week to fix the cross compiling for the lldb-server. FYI, it wanted to link the X86's libxml2 with RISCV which didn't work. Also the CMake flag for disabling libxml2 didn't work for me.
I deinstalled the dependency and then it worked but it took a week.

I think, I've got the setup now. But I am still struggling to test this particular test.

How far I have got:

(RISCV lldb-server)

```
cmake -S llvm -B build -G Ninja \
  -DCMAKE_BUILD_TYPE=MinSizeRel \
  -DLLVM_ENABLE_PROJECTS="clang;lld;lldb" \
  -DCMAKE_SYSTEM_NAME=Linux \
  -DCMAKE_SYSTEM_PROCESSOR=RISCV \
  -DCMAKE_C_COMPILER=riscv64-linux-gnu-gcc \
  -DCMAKE_CXX_COMPILER=riscv64-linux-gnu-g++ \
  -DLLVM_HOST_TRIPLE=riscv64-unknown-linux-gnu \
  -DLLVM_ENABLE_LIBXML2=0 \
  -DLLVM_ENABLE_TERMINFO=0 \
  -DLLDB_ENABLE_PYTHON=0 \
  -DLLDB_ENABLE_LIBEDIT=0 \
  -DLLDB_ENABLE_CURSES=0
```

(X86 lldb)

```
cmake -S llvm -B build -G Ninja -DCMAKE_BUILD_TYPE=MinSizeRel -DLLVM_ENABLE_PROJECTS="lldb;clang;lld" -DLLVM_CCACHE_BUILD=1 -DCMAKE_C_COMPILER_LAUNCHER=sccache -DCMAKE_CXX_COMPILER_LAUNCHER=sccache -DLLVM_TARGETS_TO_BUILD="X86"  -DLLDB_ENABLE_PYTHON=ON
```

(Qemu)

You would need a debian image setup for that.

```
qemu-system-riscv64 \
    -machine virt \
    -cpu rv64 \
    -m 2G \
    -device virtio-blk-device,drive=hd \
    -drive file=overlay.qcow2,if=none,id=hd \
    -device virtio-net-device,netdev=net \
    -netdev user,id=net,hostfwd=tcp::2222-:22,hostfwd=tcp::9999-:9999,hostfwd=tcp::10000-:10000 \
    -bios /usr/lib/riscv64-linux-gnu/opensbi/generic/fw_jump.elf \
    -kernel /usr/lib/u-boot/qemu-riscv64_smode/uboot.elf \
    -object rng-random,filename=/dev/urandom,id=rng \
    -device virtio-rng-device,rng=rng \
    -append "root=LABEL=rootfs console=ttyS0" \
    -nographic \
    -drive file=persistent_disk.qcow2,if=none,id=hd1 \
    -device virtio-blk-device,drive=hd1
```

In the Qemu guest, I run the following command. I also receive "Connection established" so networking seems to work.

```
./lldb-server platform --server --listen 0.0.0.0:9999 --gdbserver 10000
```

(On the host X86)

```
./lldb-dotest --platform-name remote-linux --arch riscv --arch riscv64 --compiler riscv64-linux-gnu-gcc --platform-url connect://localhost:9999 -p riscv64-gp-read
```

The last piece of the puzzle is not working for me because it tells me that there are no matching tests. Could you tell me how to do this?

https://github.com/llvm/llvm-project/pull/124475