rustc segfault

[haraldh]

Code

Steps to reproduce are in this comment
and in this comment

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rustc --version --verbose:

rustc 1.42.0 (b8cedc004 2020-03-09)
binary: rustc
commit-hash: b8cedc00407a4c56a3bda1ed605c6fc166655447
commit-date: 2020-03-09
host: x86_64-unknown-linux-gnu
release: 1.42.0
LLVM version: 9.0

and

rustc 1.43.0-nightly (c20d7eecb 2020-03-11)
binary: rustc
commit-hash: c20d7eecbc0928b57da8fe30b2ef8528e2bdd5be
commit-date: 2020-03-11
host: x86_64-unknown-linux-gnu
release: 1.43.0-nightly
LLVM version: 9.0

Error output

gdb backtrace with 1.42.0

Thread 2 "rustc" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffef7ff700 (LWP 258154)]
0x00007ffff482cf95 in __memmove_sse2_unaligned_erms () from /lib64/libc.so.6
(gdb) 
(gdb) bt
#0  0x00007ffff482cf95 in __memmove_sse2_unaligned_erms () from /lib64/libc.so.6
#1  0x00007ffff1b70226 in llvm::AttributeList::addAttributes(llvm::LLVMContext&, unsigned int, llvm::AttrBuilder const&) const ()
   from /home/harald/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/../lib/../lib/libLLVM-9-rust-1.42.0-stable.so
#2  0x00007ffff1c4d226 in llvm::Function::addAttributes(unsigned int, llvm::AttrBuilder const&) ()
   from /home/harald/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/../lib/../lib/libLLVM-9-rust-1.42.0-stable.so
#3  0x00007ffff53b7dd0 in LLVMRustAddFunctionAttribute ()
   from /home/harald/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/../lib/librustc_driver-f0fe6d0442c8c573.so
#4  0x00007ffff53abd2e in rustc_codegen_llvm::declare::declare_raw_fn ()
   from /home/harald/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/../lib/librustc_driver-f0fe6d0442c8c573.so
#5  0x00007ffff528b3f2 in <rustc_codegen_llvm::context::CodegenCx as rustc_codegen_ssa::traits::misc::MiscMethods>::eh_personality ()
   from /home/harald/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/../lib/librustc_driver-f0fe6d0442c8c573.so
#6  0x00007ffff5369714 in rustc_codegen_ssa::mir::codegen_mir ()
   from /home/harald/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/../lib/librustc_driver-f0fe6d0442c8c573.so
#7  0x00007ffff5287335 in <rustc::mir::mono::MonoItem as rustc_codegen_ssa::mono_item::MonoItemExt>::define ()
   from /home/harald/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/../lib/librustc_driver-f0fe6d0442c8c573.so
#8  0x00007ffff52509ca in rustc_codegen_llvm::base::compile_codegen_unit::module_codegen ()
   from /home/harald/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/../lib/librustc_driver-f0fe6d0442c8c573.so
#9  0x00007ffff52ca460 in rustc::dep_graph::graph::DepGraph::with_task ()
   from /home/harald/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/../lib/librustc_driver-f0fe6d0442c8c573.so
#10 0x00007ffff5250624 in rustc_codegen_llvm::base::compile_codegen_unit ()
   from /home/harald/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/../lib/librustc_driver-f0fe6d0442c8c573.so
#11 0x00007ffff5321fb6 in rustc_codegen_ssa::base::codegen_crate ()
   from /home/harald/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/../lib/librustc_driver-f0fe6d0442c8c573.so
#12 0x00007ffff52b49fe in <rustc_codegen_llvm::LlvmCodegenBackend as rustc_codegen_utils::codegen_backend::CodegenBackend>::codegen_crate ()
   from /home/harald/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/../lib/librustc_driver-f0fe6d0442c8c573.so
#13 0x00007ffff5126d6f in rustc_session::utils::<impl rustc_session::session::Session>::time ()
   from /home/harald/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/../lib/librustc_driver-f0fe6d0442c8c573.so
#14 0x00007ffff51c1de8 in rustc_interface::passes::QueryContext::enter ()
   from /home/harald/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/../lib/librustc_driver-f0fe6d0442c8c573.so
#15 0x00007ffff5123a91 in rustc_interface::queries::Queries::ongoing_codegen ()
   from /home/harald/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/../lib/librustc_driver-f0fe6d0442c8c573.so
#16 0x00007ffff4f62224 in rustc_interface::interface::run_compiler_in_existing_thread_pool ()
   from /home/harald/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/../lib/librustc_driver-f0fe6d0442c8c573.so
#17 0x00007ffff4f5137d in scoped_tls::ScopedKey<T>::set ()
   from /home/harald/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/../lib/librustc_driver-f0fe6d0442c8c573.so
#18 0x00007ffff4f4e584 in syntax::with_globals ()
   from /home/harald/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/../lib/librustc_driver-f0fe6d0442c8c573.so
#19 0x00007ffff4f523b0 in std::sys_common::backtrace::__rust_begin_short_backtrace ()
   from /home/harald/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/../lib/librustc_driver-f0fe6d0442c8c573.so
#20 0x00007ffff4a18b97 in __rust_maybe_catch_panic () at src/libpanic_unwind/lib.rs:86
#21 0x00007ffff4f64449 in core::ops::function::FnOnce::call_once{{vtable-shim}} ()
   from /home/harald/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/../lib/librustc_driver-f0fe6d0442c8c573.so
#22 0x00007ffff49e7e8f in <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once ()
    at /rustc/b8cedc00407a4c56a3bda1ed605c6fc166655447/src/liballoc/boxed.rs:1015
#23 0x00007ffff4a177b0 in <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once ()
    at /rustc/b8cedc00407a4c56a3bda1ed605c6fc166655447/src/liballoc/boxed.rs:1015
#24 std::sys_common::thread::start_thread () at src/libstd/sys_common/thread.rs:13
#25 std::sys::unix::thread::Thread::new::thread_start () at src/libstd/sys/unix/thread.rs:80
#26 0x00007ffff4968432 in start_thread () from /lib64/libpthread.so.0
#27 0x00007ffff4884833 in clone () from /lib64/libc.so.6

gdb backtrace with 1.43.0-nightly (c20d7ee 2020-03-11)

Thread 2 "rustc" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffef1ff700 (LWP 258633)]
0x00007ffff154a1bd in llvm::AttributeList::addAttributes(llvm::LLVMContext&, unsigned int, llvm::AttrBuilder const&) const ()
   from /home/harald/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin/../lib/../lib/libLLVM-9-rust-1.43.0-nightly.so
(gdb) bt
#0  0x00007ffff154a1bd in llvm::AttributeList::addAttributes(llvm::LLVMContext&, unsigned int, llvm::AttrBuilder const&) const ()
   from /home/harald/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin/../lib/../lib/libLLVM-9-rust-1.43.0-nightly.so
#1  0x00007ffff1627226 in llvm::Function::addAttributes(unsigned int, llvm::AttrBuilder const&) ()
   from /home/harald/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin/../lib/../lib/libLLVM-9-rust-1.43.0-nightly.so
#2  0x00007ffff4efc5c0 in LLVMRustAddFunctionAttribute ()
   from /home/harald/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin/../lib/librustc_driver-5bafe156ff266a09.so
#3  0x00007ffff4d436c6 in rustc_codegen_llvm::declare::declare_raw_fn ()
   from /home/harald/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin/../lib/librustc_driver-5bafe156ff266a09.so
#4  0x00007ffff4dd4a52 in <rustc_codegen_llvm::context::CodegenCx as rustc_codegen_ssa::traits::misc::MiscMethods>::eh_personality ()
   from /home/harald/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin/../lib/librustc_driver-5bafe156ff266a09.so
#5  0x00007ffff4e39944 in rustc_codegen_ssa::mir::codegen_mir ()
   from /home/harald/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin/../lib/librustc_driver-5bafe156ff266a09.so
#6  0x00007ffff4dc1e7c in <rustc::mir::mono::MonoItem as rustc_codegen_ssa::mono_item::MonoItemExt>::define ()
   from /home/harald/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin/../lib/librustc_driver-5bafe156ff266a09.so
#7  0x00007ffff4d3f71a in rustc_codegen_llvm::base::compile_codegen_unit::module_codegen ()
   from /home/harald/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin/../lib/librustc_driver-5bafe156ff266a09.so
#8  0x00007ffff4e237a1 in rustc::dep_graph::graph::DepGraph::with_task ()
   from /home/harald/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin/../lib/librustc_driver-5bafe156ff266a09.so
#9  0x00007ffff4d3f314 in rustc_codegen_llvm::base::compile_codegen_unit ()
   from /home/harald/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin/../lib/librustc_driver-5bafe156ff266a09.so
#10 0x00007ffff4ea0f5f in rustc_codegen_ssa::base::codegen_crate ()
   from /home/harald/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin/../lib/librustc_driver-5bafe156ff266a09.so
#11 0x00007ffff4e35415 in <rustc_codegen_llvm::LlvmCodegenBackend as rustc_codegen_utils::codegen_backend::CodegenBackend>::codegen_crate ()
   from /home/harald/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin/../lib/librustc_driver-5bafe156ff266a09.so
#12 0x00007ffff4cbce16 in rustc_interface::passes::start_codegen ()
   from /home/harald/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin/../lib/librustc_driver-5bafe156ff266a09.so
#13 0x00007ffff4cd0923 in rustc::ty::context::tls::enter_global ()
   from /home/harald/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin/../lib/librustc_driver-5bafe156ff266a09.so
#14 0x00007ffff4be4126 in rustc_interface::queries::Queries::ongoing_codegen ()
   from /home/harald/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin/../lib/librustc_driver-5bafe156ff266a09.so
#15 0x00007ffff4a93ff6 in rustc_interface::interface::run_compiler_in_existing_thread_pool ()
   from /home/harald/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin/../lib/librustc_driver-5bafe156ff266a09.so
#16 0x00007ffff4a47bcd in scoped_tls::ScopedKey<T>::set ()
   from /home/harald/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin/../lib/librustc_driver-5bafe156ff266a09.so
#17 0x00007ffff4a44c14 in rustc_ast::attr::with_globals ()
   from /home/harald/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin/../lib/librustc_driver-5bafe156ff266a09.so
#18 0x00007ffff4a49060 in std::sys_common::backtrace::__rust_begin_short_backtrace ()
   from /home/harald/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin/../lib/librustc_driver-5bafe156ff266a09.so
#19 0x00007ffff43fa697 in __rust_maybe_catch_panic () at src/libpanic_unwind/lib.rs:86
#20 0x00007ffff4a96486 in core::ops::function::FnOnce::call_once{{vtable-shim}} ()
   from /home/harald/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin/../lib/librustc_driver-5bafe156ff266a09.so
#21 0x00007ffff43c563f in <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once ()
    at /rustc/c20d7eecbc0928b57da8fe30b2ef8528e2bdd5be/src/liballoc/boxed.rs:1017
#22 0x00007ffff43f8f9d in <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once ()
    at /rustc/c20d7eecbc0928b57da8fe30b2ef8528e2bdd5be/src/liballoc/boxed.rs:1017
#23 std::sys_common::thread::start_thread () at src/libstd/sys_common/thread.rs:13
#24 std::sys::unix::thread::Thread::new::thread_start () at src/libstd/sys/unix/thread.rs:80
#25 0x00007ffff4344432 in start_thread () from /lib64/libpthread.so.0
#26 0x00007ffff4260833 in clone () from /lib64/libc.so.6

[haraldh]

 /home/harald/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin/rustc --crate-name kernel --edition=2018 kernel/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type lib --emit=dep-info,metadata,link -C opt-level=3 -C panic=abort --cfg 'feature="default"' -C metadata=daec79c354bbdca0 -C extra-filename=-daec79c354bbdca0 --out-dir /home/harald/git/enarx_sev_kvm_demo/target/x86_64-unknown-linux-musl/release/deps --target x86_64-unknown-linux-musl -L dependency=/home/harald/git/enarx_sev_kvm_demo/target/x86_64-unknown-linux-musl/release/deps -L dependency=/home/harald/git/enarx_sev_kvm_demo/target/release/deps --extern bitflags=/home/harald/git/enarx_sev_kvm_demo/target/x86_64-unknown-linux-musl/release/deps/libbitflags-95ba804a36fe1702.rmeta --extern crt0stack=/home/harald/git/enarx_sev_kvm_demo/target/x86_64-unknown-linux-musl/release/deps/libcrt0stack-9b55dc1549fd6e63.rmeta --extern lazy_static=/home/harald/git/enarx_sev_kvm_demo/target/x86_64-unknown-linux-musl/release/deps/liblazy_static-110cedc9f47571f2.rmeta --extern linux_errno=/home/harald/git/enarx_sev_kvm_demo/target/x86_64-unknown-linux-musl/release/deps/liblinux_errno-024207093360abfd.rmeta --extern linux_syscall=/home/harald/git/enarx_sev_kvm_demo/target/x86_64-unknown-linux-musl/release/deps/liblinux_syscall-4cbc42edd4142e75.rmeta --extern spin=/home/harald/git/enarx_sev_kvm_demo/target/x86_64-unknown-linux-musl/release/deps/libspin-81aa4f2377e3e1aa.rmeta --extern vmbootspec=/home/harald/git/enarx_sev_kvm_demo/target/x86_64-unknown-linux-musl/release/deps/libvmbootspec-6bbf48e889a633a3.rmeta --extern vmsyscall=/home/harald/git/enarx_sev_kvm_demo/target/x86_64-unknown-linux-musl/release/deps/libvmsyscall-f9481026d9d0a4d6.rmeta --extern x86_64=/home/harald/git/enarx_sev_kvm_demo/target/x86_64-unknown-linux-musl/release/deps/libx86_64-3689e0e08bbda521.rmeta -C linker=./cc -C linker=./cc -L native=/home/harald/git/enarx_sev_kvm_demo/target/x86_64-unknown-linux-musl/release/build/kernel-4ea535f90d18f40e/out -l static=asm -L native=/home/harald/git/enarx_sev_kvm_demo/target/x86_64-unknown-linux-musl/release/build/x86_64-435956abdc21ea2b/out

[haraldh]

oops, corrected backtrace of nightly.. pasted the stable output again.

[spastorino]

@haraldh can you share the code that causes this issue?.

[spastorino]

triage: we couldn't decide the priority of the issue due to the lack of code. Left nomination so we can check again once we have the code that triggers the issue.

[haraldh]

@haraldh can you share the code that causes this issue?.

@spastorino:

$ sudo apt-get install musl-tools
$ git clone --single-branch -b rust_segfault https://github.com/haraldh/enarx_sev_kvm_demo.git
$ cd enarx_sev_kvm_demo/kernel/
$ while cargo build -vvv --release ; do cargo clean; done; 

[pnkfelix]

@rustbot ping cleanup-crew

[rustbot]

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