Stream: git-wasmtime

Topic: wasmtime / issue #3100 Cranelift: x64 backend crashes com...

view this post on Zulip Wasmtime GitHub notifications bot (Jul 20 2021 at 13:02):

afonso360 labeled issue #3100:

Hey, While working on implementing br_table's for the interpreter i found the following test case that crashes on the x64 backend. This test case passes on s390x and aarch64, and on x64 it only fails for the i64 data type, it passes on i32, i16 and i8's.

.clif Test Case

test run
target x86_64 machinst

function %br_table_i64(i64) -> i64 {
  jt0 = jump_table [block1, block2, block2, block3]

block0(v0: i64):
  br_table v0, block4, jt0

block1:
  v1 = iconst.i64 1
  jump block5(v1)

block2:
  v2 = iconst.i64 2
  jump block5(v2)

block3:
  v3 = iconst.i64 3
  jump block5(v3)

block4:
  v4 = iconst.i64 4
  jump block5(v4)

block5(v5: i64):
  v6 = iadd.i64 v0, v5
  return v6
}
; run: %br_table_i64(0) == 1
; run: %br_table_i64(1) == 3
; run: %br_table_i64(2) == 4
; run: %br_table_i64(3) == 6
; run: %br_table_i64(4) == 8
; run: %br_table_i64(5) == 9
; run: %br_table_i64(6) == 10
; run: %br_table_i64(-1) == 3

Expected Results

This test case to pass.

Actual Results

This crashes with the following error:

thread 'worker #0' panicked at 'invalid extension: 64 -> 32', cranelift\codegen\src\isa\x64\lower.rs:233:38
stack backtrace:
   0: std::panicking::begin_panic_handler
             at /rustc/7c3872e6bfd555d2ad753ac1f871db3bd7f2a547\/library\std\src\panicking.rs:515
   1: core::panicking::panic_fmt
             at /rustc/7c3872e6bfd555d2ad753ac1f871db3bd7f2a547\/library\core\src\panicking.rs:92
   2: core::option::expect_failed
             at /rustc/7c3872e6bfd555d2ad753ac1f871db3bd7f2a547\/library\core\src\option.rs:1243
   3: enum$<core::option::Option<enum$<cranelift_codegen::isa::x64::inst::args::ExtMode>>, 0, 4, Some>::expect<enum$<cranelift_codegen::isa::x64::inst::args::ExtMode>>
             at /rustc/7c3872e6bfd555d2ad753ac1f871db3bd7f2a547\library\core\src\option.rs:351
   4: cranelift_codegen::isa::x64::lower::extend_input_to_reg<cranelift_codegen::machinst::lower::Lower<enum$<cranelift_codegen::isa::x64::inst::Inst>>>
             at .\codegen\src\isa\x64\lower.rs:233
   5: cranelift_codegen::isa::x64::lower::{{impl}}::lower_branch_group<cranelift_codegen::machinst::lower::Lower<enum$<cranelift_codegen::isa::x64::inst::Inst>>>
             at .\codegen\src\isa\x64\lower.rs:6843
   6: cranelift_codegen::machinst::lower::Lower<enum$<cranelift_codegen::isa::x64::inst::Inst>>::lower_clif_branches<enum$<cranelift_codegen::isa::x64::inst::Inst>,cranelift_codegen::isa::x64::X64Backend>
             at .\codegen\src\machinst\lower.rs:880
   7: cranelift_codegen::machinst::lower::Lower<enum$<cranelift_codegen::isa::x64::inst::Inst>>::lower<enum$<cranelift_codegen::isa::x64::inst::Inst>,cranelift_codegen::isa::x64::X64Backend>
             at .\codegen\src\machinst\lower.rs:955
   8: cranelift_codegen::machinst::compile::compile<cranelift_codegen::isa::x64::X64Backend>
             at .\codegen\src\machinst\compile.rs:30
   9: cranelift_codegen::isa::x64::X64Backend::compile_vcode
             at .\codegen\src\isa\x64\mod.rs:51
  10: cranelift_codegen::isa::x64::{{impl}}::compile_function
             at .\codegen\src\isa\x64\mod.rs:62
  11: cranelift_codegen::context::Context::compile
             at .\codegen\src\context.rs:197
  12: cranelift_filetests::function_runner::compile
             at .\filetests\src\function_runner.rs:286
  13: cranelift_filetests::function_runner::SingleFunctionCompiler::compile
             at .\filetests\src\function_runner.rs:77
  14: cranelift_filetests::test_run::{{impl}}::run
             at .\filetests\src\test_run.rs:61
  15: cranelift_filetests::runone::run_one_test
             at .\filetests\src\runone.rs:188
  16: cranelift_filetests::runone::run
             at .\filetests\src\runone.rs:132
  17: cranelift_filetests::concurrent::worker_thread::{{closure}}::{{closure}}
             at .\filetests\src\concurrent.rs:150
  18: std::panicking::try::do_call<closure-0,enum$<core::result::Result<core::time::Duration, anyhow::Error>>>
             at /rustc/7c3872e6bfd555d2ad753ac1f871db3bd7f2a547\library\std\src\panicking.rs:401
  19: std::panicking::try::do_catch<std::panic::AssertUnwindSafe<closure-0>,tuple<>>
  20: std::panicking::try<enum$<core::result::Result<core::time::Duration, anyhow::Error>>,closure-0>
             at /rustc/7c3872e6bfd555d2ad753ac1f871db3bd7f2a547\library\std\src\panicking.rs:365
  21: std::panic::catch_unwind<closure-0,enum$<core::result::Result<core::time::Duration, anyhow::Error>>>
             at /rustc/7c3872e6bfd555d2ad753ac1f871db3bd7f2a547\library\std\src\panic.rs:434
  22: cranelift_filetests::concurrent::worker_thread::{{closure}}
             at .\filetests\src\concurrent.rs:150
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

view this post on Zulip Wasmtime GitHub notifications bot (Jul 20 2021 at 13:02):

afonso360 opened issue #3100:

Hey, While working on implementing br_table's for the interpreter i found the following test case that crashes on the x64 backend. This test case passes on s390x and aarch64, and on x64 it only fails for the i64 data type, it passes on i32, i16 and i8's.

.clif Test Case

test run
target x86_64 machinst

function %br_table_i64(i64) -> i64 {
  jt0 = jump_table [block1, block2, block2, block3]

block0(v0: i64):
  br_table v0, block4, jt0

block1:
  v1 = iconst.i64 1
  jump block5(v1)

block2:
  v2 = iconst.i64 2
  jump block5(v2)

block3:
  v3 = iconst.i64 3
  jump block5(v3)

block4:
  v4 = iconst.i64 4
  jump block5(v4)

block5(v5: i64):
  v6 = iadd.i64 v0, v5
  return v6
}
; run: %br_table_i64(0) == 1
; run: %br_table_i64(1) == 3
; run: %br_table_i64(2) == 4
; run: %br_table_i64(3) == 6
; run: %br_table_i64(4) == 8
; run: %br_table_i64(5) == 9
; run: %br_table_i64(6) == 10
; run: %br_table_i64(-1) == 3

Expected Results

This test case to pass.

Actual Results

This crashes with the following error:

thread 'worker #0' panicked at 'invalid extension: 64 -> 32', cranelift\codegen\src\isa\x64\lower.rs:233:38
stack backtrace:
   0: std::panicking::begin_panic_handler
             at /rustc/7c3872e6bfd555d2ad753ac1f871db3bd7f2a547\/library\std\src\panicking.rs:515
   1: core::panicking::panic_fmt
             at /rustc/7c3872e6bfd555d2ad753ac1f871db3bd7f2a547\/library\core\src\panicking.rs:92
   2: core::option::expect_failed
             at /rustc/7c3872e6bfd555d2ad753ac1f871db3bd7f2a547\/library\core\src\option.rs:1243
   3: enum$<core::option::Option<enum$<cranelift_codegen::isa::x64::inst::args::ExtMode>>, 0, 4, Some>::expect<enum$<cranelift_codegen::isa::x64::inst::args::ExtMode>>
             at /rustc/7c3872e6bfd555d2ad753ac1f871db3bd7f2a547\library\core\src\option.rs:351
   4: cranelift_codegen::isa::x64::lower::extend_input_to_reg<cranelift_codegen::machinst::lower::Lower<enum$<cranelift_codegen::isa::x64::inst::Inst>>>
             at .\codegen\src\isa\x64\lower.rs:233
   5: cranelift_codegen::isa::x64::lower::{{impl}}::lower_branch_group<cranelift_codegen::machinst::lower::Lower<enum$<cranelift_codegen::isa::x64::inst::Inst>>>
             at .\codegen\src\isa\x64\lower.rs:6843
   6: cranelift_codegen::machinst::lower::Lower<enum$<cranelift_codegen::isa::x64::inst::Inst>>::lower_clif_branches<enum$<cranelift_codegen::isa::x64::inst::Inst>,cranelift_codegen::isa::x64::X64Backend>
             at .\codegen\src\machinst\lower.rs:880
   7: cranelift_codegen::machinst::lower::Lower<enum$<cranelift_codegen::isa::x64::inst::Inst>>::lower<enum$<cranelift_codegen::isa::x64::inst::Inst>,cranelift_codegen::isa::x64::X64Backend>
             at .\codegen\src\machinst\lower.rs:955
   8: cranelift_codegen::machinst::compile::compile<cranelift_codegen::isa::x64::X64Backend>
             at .\codegen\src\machinst\compile.rs:30
   9: cranelift_codegen::isa::x64::X64Backend::compile_vcode
             at .\codegen\src\isa\x64\mod.rs:51
  10: cranelift_codegen::isa::x64::{{impl}}::compile_function
             at .\codegen\src\isa\x64\mod.rs:62
  11: cranelift_codegen::context::Context::compile
             at .\codegen\src\context.rs:197
  12: cranelift_filetests::function_runner::compile
             at .\filetests\src\function_runner.rs:286
  13: cranelift_filetests::function_runner::SingleFunctionCompiler::compile
             at .\filetests\src\function_runner.rs:77
  14: cranelift_filetests::test_run::{{impl}}::run
             at .\filetests\src\test_run.rs:61
  15: cranelift_filetests::runone::run_one_test
             at .\filetests\src\runone.rs:188
  16: cranelift_filetests::runone::run
             at .\filetests\src\runone.rs:132
  17: cranelift_filetests::concurrent::worker_thread::{{closure}}::{{closure}}
             at .\filetests\src\concurrent.rs:150
  18: std::panicking::try::do_call<closure-0,enum$<core::result::Result<core::time::Duration, anyhow::Error>>>
             at /rustc/7c3872e6bfd555d2ad753ac1f871db3bd7f2a547\library\std\src\panicking.rs:401
  19: std::panicking::try::do_catch<std::panic::AssertUnwindSafe<closure-0>,tuple<>>
  20: std::panicking::try<enum$<core::result::Result<core::time::Duration, anyhow::Error>>,closure-0>
             at /rustc/7c3872e6bfd555d2ad753ac1f871db3bd7f2a547\library\std\src\panicking.rs:365
  21: std::panic::catch_unwind<closure-0,enum$<core::result::Result<core::time::Duration, anyhow::Error>>>
             at /rustc/7c3872e6bfd555d2ad753ac1f871db3bd7f2a547\library\std\src\panic.rs:434
  22: cranelift_filetests::concurrent::worker_thread::{{closure}}
             at .\filetests\src\concurrent.rs:150
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

view this post on Zulip Wasmtime GitHub notifications bot (Jul 20 2021 at 13:02):

afonso360 labeled issue #3100:

Hey, While working on implementing br_table's for the interpreter i found the following test case that crashes on the x64 backend. This test case passes on s390x and aarch64, and on x64 it only fails for the i64 data type, it passes on i32, i16 and i8's.

.clif Test Case

test run
target x86_64 machinst

function %br_table_i64(i64) -> i64 {
  jt0 = jump_table [block1, block2, block2, block3]

block0(v0: i64):
  br_table v0, block4, jt0

block1:
  v1 = iconst.i64 1
  jump block5(v1)

block2:
  v2 = iconst.i64 2
  jump block5(v2)

block3:
  v3 = iconst.i64 3
  jump block5(v3)

block4:
  v4 = iconst.i64 4
  jump block5(v4)

block5(v5: i64):
  v6 = iadd.i64 v0, v5
  return v6
}
; run: %br_table_i64(0) == 1
; run: %br_table_i64(1) == 3
; run: %br_table_i64(2) == 4
; run: %br_table_i64(3) == 6
; run: %br_table_i64(4) == 8
; run: %br_table_i64(5) == 9
; run: %br_table_i64(6) == 10
; run: %br_table_i64(-1) == 3

Expected Results

This test case to pass.

Actual Results

This crashes with the following error:

thread 'worker #0' panicked at 'invalid extension: 64 -> 32', cranelift\codegen\src\isa\x64\lower.rs:233:38
stack backtrace:
   0: std::panicking::begin_panic_handler
             at /rustc/7c3872e6bfd555d2ad753ac1f871db3bd7f2a547\/library\std\src\panicking.rs:515
   1: core::panicking::panic_fmt
             at /rustc/7c3872e6bfd555d2ad753ac1f871db3bd7f2a547\/library\core\src\panicking.rs:92
   2: core::option::expect_failed
             at /rustc/7c3872e6bfd555d2ad753ac1f871db3bd7f2a547\/library\core\src\option.rs:1243
   3: enum$<core::option::Option<enum$<cranelift_codegen::isa::x64::inst::args::ExtMode>>, 0, 4, Some>::expect<enum$<cranelift_codegen::isa::x64::inst::args::ExtMode>>
             at /rustc/7c3872e6bfd555d2ad753ac1f871db3bd7f2a547\library\core\src\option.rs:351
   4: cranelift_codegen::isa::x64::lower::extend_input_to_reg<cranelift_codegen::machinst::lower::Lower<enum$<cranelift_codegen::isa::x64::inst::Inst>>>
             at .\codegen\src\isa\x64\lower.rs:233
   5: cranelift_codegen::isa::x64::lower::{{impl}}::lower_branch_group<cranelift_codegen::machinst::lower::Lower<enum$<cranelift_codegen::isa::x64::inst::Inst>>>
             at .\codegen\src\isa\x64\lower.rs:6843
   6: cranelift_codegen::machinst::lower::Lower<enum$<cranelift_codegen::isa::x64::inst::Inst>>::lower_clif_branches<enum$<cranelift_codegen::isa::x64::inst::Inst>,cranelift_codegen::isa::x64::X64Backend>
             at .\codegen\src\machinst\lower.rs:880
   7: cranelift_codegen::machinst::lower::Lower<enum$<cranelift_codegen::isa::x64::inst::Inst>>::lower<enum$<cranelift_codegen::isa::x64::inst::Inst>,cranelift_codegen::isa::x64::X64Backend>
             at .\codegen\src\machinst\lower.rs:955
   8: cranelift_codegen::machinst::compile::compile<cranelift_codegen::isa::x64::X64Backend>
             at .\codegen\src\machinst\compile.rs:30
   9: cranelift_codegen::isa::x64::X64Backend::compile_vcode
             at .\codegen\src\isa\x64\mod.rs:51
  10: cranelift_codegen::isa::x64::{{impl}}::compile_function
             at .\codegen\src\isa\x64\mod.rs:62
  11: cranelift_codegen::context::Context::compile
             at .\codegen\src\context.rs:197
  12: cranelift_filetests::function_runner::compile
             at .\filetests\src\function_runner.rs:286
  13: cranelift_filetests::function_runner::SingleFunctionCompiler::compile
             at .\filetests\src\function_runner.rs:77
  14: cranelift_filetests::test_run::{{impl}}::run
             at .\filetests\src\test_run.rs:61
  15: cranelift_filetests::runone::run_one_test
             at .\filetests\src\runone.rs:188
  16: cranelift_filetests::runone::run
             at .\filetests\src\runone.rs:132
  17: cranelift_filetests::concurrent::worker_thread::{{closure}}::{{closure}}
             at .\filetests\src\concurrent.rs:150
  18: std::panicking::try::do_call<closure-0,enum$<core::result::Result<core::time::Duration, anyhow::Error>>>
             at /rustc/7c3872e6bfd555d2ad753ac1f871db3bd7f2a547\library\std\src\panicking.rs:401
  19: std::panicking::try::do_catch<std::panic::AssertUnwindSafe<closure-0>,tuple<>>
  20: std::panicking::try<enum$<core::result::Result<core::time::Duration, anyhow::Error>>,closure-0>
             at /rustc/7c3872e6bfd555d2ad753ac1f871db3bd7f2a547\library\std\src\panicking.rs:365
  21: std::panic::catch_unwind<closure-0,enum$<core::result::Result<core::time::Duration, anyhow::Error>>>
             at /rustc/7c3872e6bfd555d2ad753ac1f871db3bd7f2a547\library\std\src\panic.rs:434
  22: cranelift_filetests::concurrent::worker_thread::{{closure}}
             at .\filetests\src\concurrent.rs:150
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

view this post on Zulip Wasmtime GitHub notifications bot (Jul 20 2021 at 13:36):

bjorn3 commented on issue #3100:

Can you update https://github.com/bytecodealliance/wasmtime/blob/ebbe3997251add0278cc2de9c18dc43a1895f580/cranelift/frontend/src/switch.rs#L279-L285 once it is implemented?

view this post on Zulip Wasmtime GitHub notifications bot (Sep 02 2021 at 16:58):

cfallin closed issue #3100:

Hey, While working on implementing br_table's for the interpreter i found the following test case that crashes on the x64 backend. This test case passes on s390x and aarch64, and on x64 it only fails for the i64 data type, it passes on i32, i16 and i8's.

.clif Test Case

test run
target x86_64 machinst

function %br_table_i64(i64) -> i64 {
  jt0 = jump_table [block1, block2, block2, block3]

block0(v0: i64):
  br_table v0, block4, jt0

block1:
  v1 = iconst.i64 1
  jump block5(v1)

block2:
  v2 = iconst.i64 2
  jump block5(v2)

block3:
  v3 = iconst.i64 3
  jump block5(v3)

block4:
  v4 = iconst.i64 4
  jump block5(v4)

block5(v5: i64):
  v6 = iadd.i64 v0, v5
  return v6
}
; run: %br_table_i64(0) == 1
; run: %br_table_i64(1) == 3
; run: %br_table_i64(2) == 4
; run: %br_table_i64(3) == 6
; run: %br_table_i64(4) == 8
; run: %br_table_i64(5) == 9
; run: %br_table_i64(6) == 10
; run: %br_table_i64(-1) == 3

Expected Results

This test case to pass.

Actual Results

This crashes with the following error:

thread 'worker #0' panicked at 'invalid extension: 64 -> 32', cranelift\codegen\src\isa\x64\lower.rs:233:38
stack backtrace:
   0: std::panicking::begin_panic_handler
             at /rustc/7c3872e6bfd555d2ad753ac1f871db3bd7f2a547\/library\std\src\panicking.rs:515
   1: core::panicking::panic_fmt
             at /rustc/7c3872e6bfd555d2ad753ac1f871db3bd7f2a547\/library\core\src\panicking.rs:92
   2: core::option::expect_failed
             at /rustc/7c3872e6bfd555d2ad753ac1f871db3bd7f2a547\/library\core\src\option.rs:1243
   3: enum$<core::option::Option<enum$<cranelift_codegen::isa::x64::inst::args::ExtMode>>, 0, 4, Some>::expect<enum$<cranelift_codegen::isa::x64::inst::args::ExtMode>>
             at /rustc/7c3872e6bfd555d2ad753ac1f871db3bd7f2a547\library\core\src\option.rs:351
   4: cranelift_codegen::isa::x64::lower::extend_input_to_reg<cranelift_codegen::machinst::lower::Lower<enum$<cranelift_codegen::isa::x64::inst::Inst>>>
             at .\codegen\src\isa\x64\lower.rs:233
   5: cranelift_codegen::isa::x64::lower::{{impl}}::lower_branch_group<cranelift_codegen::machinst::lower::Lower<enum$<cranelift_codegen::isa::x64::inst::Inst>>>
             at .\codegen\src\isa\x64\lower.rs:6843
   6: cranelift_codegen::machinst::lower::Lower<enum$<cranelift_codegen::isa::x64::inst::Inst>>::lower_clif_branches<enum$<cranelift_codegen::isa::x64::inst::Inst>,cranelift_codegen::isa::x64::X64Backend>
             at .\codegen\src\machinst\lower.rs:880
   7: cranelift_codegen::machinst::lower::Lower<enum$<cranelift_codegen::isa::x64::inst::Inst>>::lower<enum$<cranelift_codegen::isa::x64::inst::Inst>,cranelift_codegen::isa::x64::X64Backend>
             at .\codegen\src\machinst\lower.rs:955
   8: cranelift_codegen::machinst::compile::compile<cranelift_codegen::isa::x64::X64Backend>
             at .\codegen\src\machinst\compile.rs:30
   9: cranelift_codegen::isa::x64::X64Backend::compile_vcode
             at .\codegen\src\isa\x64\mod.rs:51
  10: cranelift_codegen::isa::x64::{{impl}}::compile_function
             at .\codegen\src\isa\x64\mod.rs:62
  11: cranelift_codegen::context::Context::compile
             at .\codegen\src\context.rs:197
  12: cranelift_filetests::function_runner::compile
             at .\filetests\src\function_runner.rs:286
  13: cranelift_filetests::function_runner::SingleFunctionCompiler::compile
             at .\filetests\src\function_runner.rs:77
  14: cranelift_filetests::test_run::{{impl}}::run
             at .\filetests\src\test_run.rs:61
  15: cranelift_filetests::runone::run_one_test
             at .\filetests\src\runone.rs:188
  16: cranelift_filetests::runone::run
             at .\filetests\src\runone.rs:132
  17: cranelift_filetests::concurrent::worker_thread::{{closure}}::{{closure}}
             at .\filetests\src\concurrent.rs:150
  18: std::panicking::try::do_call<closure-0,enum$<core::result::Result<core::time::Duration, anyhow::Error>>>
             at /rustc/7c3872e6bfd555d2ad753ac1f871db3bd7f2a547\library\std\src\panicking.rs:401
  19: std::panicking::try::do_catch<std::panic::AssertUnwindSafe<closure-0>,tuple<>>
  20: std::panicking::try<enum$<core::result::Result<core::time::Duration, anyhow::Error>>,closure-0>
             at /rustc/7c3872e6bfd555d2ad753ac1f871db3bd7f2a547\library\std\src\panicking.rs:365
  21: std::panic::catch_unwind<closure-0,enum$<core::result::Result<core::time::Duration, anyhow::Error>>>
             at /rustc/7c3872e6bfd555d2ad753ac1f871db3bd7f2a547\library\std\src\panic.rs:434
  22: cranelift_filetests::concurrent::worker_thread::{{closure}}
             at .\filetests\src\concurrent.rs:150
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

Last updated: Nov 22 2024 at 16:03 UTC