tzb99 added a comment.
In D128250#3640942 <https://reviews.llvm.org/D128250#3640942>, @Emmmer wrote:
> This patch change:
>
> - Add the recognition of architecture riscv64 in `HostInfoBase.cpp`
> - Add the recognition of architecture riscv64 and riscv32 in
> `ObjectFilePECOFF.cpp`
> - Add riscv's `ebreak` command to `Platform.cpp`
>
> Now lldb can debug with simple executables on `qemu-system-riscv64` and be
> able to attach to a `gdbserver`.
>
> ---
>
> TODO: some unittest failed
>
> bash
> [ RUN ] TestBase.LaunchModePreservesEnvironment
>
> /home/emmmer/git/llvm-project/lldb/unittests/tools/lldb-server/tests/LLGSTest.cpp:29:
> Failure
> Value of: llvm::detail::TakeExpected(ClientOr)
> Expected: succeeded
> Actual: failed (Unable to parse qRegisterInfo: generic)
> [ FAILED ] TestBase.LaunchModePreservesEnvironment (662 ms)
>
>
> [ RUN ] TestBase.vAttachRichError
> Connection established.
> Launched
> '/home/emmmer/git/llvm-project/build-cross/tools/lldb/unittests/tools/lldb-server/./environment_check'
> as process 1553...
> lldb-server-local_build
> Connection established.
> Launched
> '/home/emmmer/git/llvm-project/build-cross/tools/lldb/unittests/tools/lldb-server/./environment_check'
> as process 1556...
> lldb-server-local_build
>
> /home/emmmer/git/llvm-project/lldb/unittests/tools/lldb-server/tests/LLGSTest.cpp:60:
> Failure
> Value of: llvm::detail::TakeExpected(ClientOr)
> Expected: succeeded
> Actual: failed (Unable to parse qRegisterInfo: generic)
> [ FAILED ] TestBase.vAttachRichError (364 ms)
>
> In riscv, the user-mode process cannot directly take the `pc` register but
> must obtain the pc state through `auipc`, while the `pc` register is required
> to exist in the test, so it failed.
>
> ---
>
> bash
> [ RUN ] DumpDataExtractorTest.Formats
>
> /home/emmmer/git/llvm-project/lldb/unittests/Core/DumpDataExtractorTest.cpp:90:
> Failure
> Expected equality of these values:
> expected
> Which is: "{-nan -nan nan nan}"
> result.GetString()
> Which is: "{nan nan nan nan}"
> [ FAILED ] DumpDataExtractorTest.Formats (25 ms)
>
> The reason is currently unknown, and further verification is required
>
> ---
>
> About buildbot: Unfortunately, as an individual developer, I may not have the
> ability to maintain a 7*24-hour compile server or even a cluster, but I will
> do my best to provide some test reports.
Hello:
I implemented the diff into my local llvm project and cross-compiled the
project using in-tree build with enable projects as:
-DLLVM_ENABLE_PROJECTS="clang;lld;lldb"
The project can be compiled using the "Release" mode. The lldb-server can be
initiated and connected to the host machine from the qemu environment. It can
ran the riscv binary using process continue / thread continue, but the compiled
lldb-server cannot get any thread information and cannot perform thread step-in
functionality. Then I performed the Debug mode to build the project. Error
occurred so the build command cannot be finished. The error shows like:
[3759/4081] Linking CXX shared library lib/libclang-cpp.so.15git
FAILED: lib/libclang-cpp.so.15git
: && riscv-gnu-toolchain/bin/riscv64-unknown-linux-gnu-g++ -
Can your lldb-server work properly on the riscv qemu environment? My question
might be, what is the proper recipe for cross-building the lldb-server? Or,
should the diff be changed to enable getting the thread instruction info of the
lldb-server?
Thank you very much!
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D128250/new/
https://reviews.llvm.org/D128250
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