Crash with noexecstack on --target=x86_64-pc-solaris2.11 #202953

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1. llvmorg-github-actions

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   on Jun 10, 2026
2. EugeneZelenko

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   llvm:mcMachine (object) codeMachine (object) code

   crashPrefer [crash-on-valid] or [crash-on-invalid]Prefer [crash-on-valid] or [crash-on-invalid]

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   new issue

   on Jun 10, 2026
3. EugeneZelenko

   added the

   Bug

   issue type on Jun 10, 2026
4. llvmorg-github-actions commented on Jun 10, 2026

   

   llvmorg-github-actionsBot

   on Jun 10, 2026

   More actions

   @llvm/issue-subscribers-llvm-mc

   Author: Adeel Mujahid (am11)

   Details

   For linux x64 target, this works:

   $ printf '%s\n%s' ".intel_syntax noprefix" "test BYTE PTR [rdi], 0x8" | \
       clang-21 --target=x86_64-linux-gnu  -Wa,--noexecstack  -xassembler -c -

   For solaris target, this crashes

   $ printf '%s\n%s' ".intel_syntax noprefix" "test BYTE PTR [rdi], 0x8" | \
       clang-21 --target=x86_64-pc-solaris2.11  -Wa,--noexecstack  -xassembler -c -
   
   PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
   Stack dump:
   0.	Program arguments: clang-21 --target=x86_64-pc-solaris2.11 -Wa,--noexecstack -xassembler -c -
    #<!-- -->0 0x0000ffffa7ec2d94 llvm::sys::PrintStackTrace(llvm::raw_ostream&amp;, int) (/usr/lib/llvm-21/bin/../lib/libLLVM.so.21.1+0x4532d94)
    #<!-- -->1 0x0000ffffa7ec0acc llvm::sys::RunSignalHandlers() (/usr/lib/llvm-21/bin/../lib/libLLVM.so.21.1+0x4530acc)
    #<!-- -->2 0x0000ffffa7dfe890 (/usr/lib/llvm-21/bin/../lib/libLLVM.so.21.1+0x446e890)
    #<!-- -->3 0x0000ffffaf3fe7e8 (linux-vdso.so.1+0x7e8)
    #<!-- -->4 0x0000ffffa96ec474 llvm::MCELFStreamer::changeSection(llvm::MCSection*, unsigned int) (/usr/lib/llvm-21/bin/../lib/libLLVM.so.21.1+0x5d5c474)
    #<!-- -->5 0x0000ffffa971456c llvm::MCStreamer::switchSection(llvm::MCSection*, unsigned int) (/usr/lib/llvm-21/bin/../lib/libLLVM.so.21.1+0x5d8456c)
    #<!-- -->6 0x0000aaaac83e7c38 cc1as_main(llvm::ArrayRef&lt;char const*&gt;, char const*, void*) (/usr/lib/llvm-21/bin/clang+0x27c38)
    #<!-- -->7 0x0000aaaac83df724 (/usr/lib/llvm-21/bin/clang+0x1f724)
    #<!-- -->8 0x0000ffffae750fd0 (/usr/lib/llvm-21/bin/../lib/libclang-cpp.so.21.1+0x2d40fd0)
    #<!-- -->9 0x0000ffffa7dfe4d8 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref&lt;void ()&gt;) (/usr/lib/llvm-21/bin/../lib/libLLVM.so.21.1+0x446e4d8)
   #<!-- -->10 0x0000ffffae7509ac clang::driver::CC1Command::Execute(llvm::ArrayRef&lt;std::optional&lt;llvm::StringRef&gt;&gt;, std::__cxx11::basic_string&lt;char, std::char_traits&lt;char&gt;, std::allocator&lt;char&gt;&gt;*, bool*) const (/usr/lib/llvm-21/bin/../lib/libclang-cpp.so.21.1+0x2d409ac)
   #<!-- -->11 0x0000ffffae719100 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&amp;, clang::driver::Command const*&amp;, bool) const (/usr/lib/llvm-21/bin/../lib/libclang-cpp.so.21.1+0x2d09100)
   #<!-- -->12 0x0000ffffae7192b4 clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&amp;, llvm::SmallVectorImpl&lt;std::pair&lt;int, clang::driver::Command const*&gt;&gt;&amp;, bool) const (/usr/lib/llvm-21/bin/../lib/libclang-cpp.so.21.1+0x2d092b4)
   #<!-- -->13 0x0000ffffae733230 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&amp;, llvm::SmallVectorImpl&lt;std::pair&lt;int, clang::driver::Command const*&gt;&gt;&amp;) (/usr/lib/llvm-21/bin/../lib/libclang-cpp.so.21.1+0x2d23230)
   #<!-- -->14 0x0000aaaac83deea8 clang_main(int, char**, llvm::ToolContext const&amp;) (/usr/lib/llvm-21/bin/clang+0x1eea8)
   #<!-- -->15 0x0000aaaac83ec388 main (/usr/lib/llvm-21/bin/clang+0x2c388)
   #<!-- -->16 0x0000ffffa3432f1c (/usr/lib/aarch64-linux-gnu/libc.so.6+0x22f1c)
   #<!-- -->17 0x0000ffffa343305c __libc_start_main (/usr/lib/aarch64-linux-gnu/libc.so.6+0x2305c)
   #<!-- -->18 0x0000aaaac83dd570 _start (/usr/lib/llvm-21/bin/clang+0x1d570)
   clang-21: error: clang integrated assembler command failed with exit code 139 (use -v to see invocation)
   Ubuntu clang version 21.1.8 (6ubuntu1)
   Target: x86_64-pc-solaris2.11
   Thread model: posix
   InstalledDir: /usr/lib/llvm-21/bin
   clang-21: note: diagnostic msg: Error generating preprocessed source(s) - no preprocessable inputs.

   Removing -Wa,--noexecstack doesn't crash for solaris target.
5. janvorli

   added a commit that references this issue on Jun 15, 2026

   Fix illumox-x64 build with gcc and clang (#129322)

   ...

   9ce1cb9
6. eiriktsarpalis

   added a commit that references this issue on Jul 15, 2026

   Fix illumox-x64 build with gcc and clang (#129322)

   ...

   9d53908
7. ManickaP

   added a commit that references this issue on Jul 22, 2026

   Fix illumox-x64 build with gcc and clang (dotnet#129322)

   ...

   9306af6