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Segfault in lock_local_var.rb on aarch64 #1022

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RemcodM opened this issue Dec 27, 2023 · 3 comments
Closed

Segfault in lock_local_var.rb on aarch64 #1022

RemcodM opened this issue Dec 27, 2023 · 3 comments

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@RemcodM
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RemcodM commented Dec 27, 2023 

* Operating system:                linux
* Ruby implementation:             Ruby
* `concurrent-ruby` version:       1.2.2
* `concurrent-ruby-ext` installed: no
* `concurrent-ruby-edge` used:     no

When using Ruby 3.3 on Linux aarch64, booting up applications like puma or bootsnap crashes with a segfault in lock_local_var.rb.

/home/app/vendor/bundle/ruby/3.3.0/gems/concurrent-ruby-1.2.2/lib/concurrent-ruby/concurrent/atomic/lock_local_var.rb:14: [BUG] Segmentation fault at 0x0051ffff841106c0
ruby 3.3.0 (2023-12-25 revision 5124f9ac75) [aarch64-linux]

-- Control frame information -----------------------------------------------
c:0074 p:---- s:0372 e:000371 CFUNC  :resume
c:0073 p:0007 s:0368 E:000e70 BLOCK  /home/app/vendor/bundle/ruby/3.3.0/gems/concurrent-ruby-1.2.2/lib/concurrent-ruby/concurrent/atomic/lock_local_var.rb:14 [FINISH]
c:0072 p:---- s:0365 e:000364 CFUNC  :synchronize
c:0071 p:0026 s:0361 E:0003d8 METHOD /home/app/vendor/bundle/ruby/3.3.0/gems/concurrent-ruby-1.2.2/lib/concurrent-ruby/concurrent/atomic/lock_local_var.rb:12
c:0070 p:0007 s:0356 e:000355 CLASS  /home/app/vendor/bundle/ruby/3.3.0/gems/concurrent-ruby-1.2.2/lib/concurrent-ruby/concurrent/atomic/lock_local_var.rb:18
c:0069 p:0025 s:0353 e:000352 TOP    /home/app/vendor/bundle/ruby/3.3.0/gems/concurrent-ruby-1.2.2/lib/concurrent-ruby/concurrent/atomic/lock_local_var.rb:5 [FINISH]
c:0068 p:---- s:0350 e:000349 CFUNC  :require
c:0067 p:0011 s:0345 e:000344 METHOD <internal:/usr/local/lib/ruby/3.3.0/rubygems/core_ext/kernel_require.rb>:37
c:0066 p:0041 s:0339 e:000338 TOP    /home/app/vendor/bundle/ruby/3.3.0/gems/concurrent-ruby-1.2.2/lib/concurrent-ruby/concurrent/atomic/reentrant_read_write_lock.r [FINISH]
c:0065 p:---- s:0336 e:000335 CFUNC  :require
c:0064 p:0011 s:0331 e:000330 METHOD <internal:/usr/local/lib/ruby/3.3.0/rubygems/core_ext/kernel_require.rb>:37
c:0063 p:0047 s:0325 e:000324 TOP    /home/app/vendor/bundle/ruby/3.3.0/gems/concurrent-ruby-1.2.2/lib/concurrent-ruby/concurrent/atomics.rb:8 [FINISH]
c:0062 p:---- s:0322 e:000321 CFUNC  :require
c:0061 p:0011 s:0317 e:000316 METHOD <internal:/usr/local/lib/ruby/3.3.0/rubygems/core_ext/kernel_require.rb>:37
c:0060 p:0029 s:0311 e:000310 TOP    /home/app/vendor/bundle/ruby/3.3.0/gems/concurrent-ruby-1.2.2/lib/concurrent-ruby/concurrent.rb:6 [FINISH]
c:0059 p:---- s:0308 e:000307 CFUNC  :require
c:0058 p:0011 s:0303 e:000302 METHOD <internal:/usr/local/lib/ruby/3.3.0/rubygems/core_ext/kernel_require.rb>:37
c:0057 p:0005 s:0297 e:000296 TOP    /home/app/vendor/bundle/ruby/3.3.0/gems/tzinfo-2.0.6/lib/tzinfo/string_deduper.rb:4 [FINISH]
c:0056 p:---- s:0294 e:000293 CFUNC  :require_relative
c:0055 p:0025 s:0289 e:000288 TOP    /home/app/vendor/bundle/ruby/3.3.0/gems/tzinfo-2.0.6/lib/tzinfo.rb:25 [FINISH]
c:0054 p:---- s:0286 e:000285 CFUNC  :require
c:0053 p:0011 s:0281 e:000280 METHOD <internal:/usr/local/lib/ruby/3.3.0/rubygems/core_ext/kernel_require.rb>:37
c:0052 p:0005 s:0275 e:000274 TOP    /home/app/vendor/bundle/ruby/3.3.0/gems/activesupport-7.1.2/lib/active_support/values/time_zone.rb:3 [FINISH]
c:0051 p:---- s:0272 e:000271 CFUNC  :require
c:0050 p:0011 s:0267 e:000266 METHOD <internal:/usr/local/lib/ruby/3.3.0/rubygems/core_ext/kernel_require.rb>:37
c:0049 p:0017 s:0261 e:000260 TOP    /home/app/vendor/bundle/ruby/3.3.0/gems/activesupport-7.1.2/lib/active_support/time_with_zone.rb:6 [FINISH]
c:0048 p:---- s:0258 e:000257 CFUNC  :require
c:0047 p:0011 s:0253 e:000252 METHOD <internal:/usr/local/lib/ruby/3.3.0/rubygems/core_ext/kernel_require.rb>:37
c:0046 p:0005 s:0247 e:000246 TOP    /home/app/vendor/bundle/ruby/3.3.0/gems/activesupport-7.1.2/lib/active_support/core_ext/time/zones.rb:3 [FINISH]
c:0045 p:---- s:0244 e:000243 CFUNC  :require
c:0044 p:0011 s:0239 e:000238 METHOD <internal:/usr/local/lib/ruby/3.3.0/rubygems/core_ext/kernel_require.rb>:37
c:0043 p:0029 s:0233 e:000232 TOP    /home/app/vendor/bundle/ruby/3.3.0/gems/activesupport-7.1.2/lib/active_support/core_ext/date/calculations.rb:7 [FINISH]
c:0042 p:---- s:0230 e:000229 CFUNC  :require
c:0041 p:0011 s:0225 e:000224 METHOD <internal:/usr/local/lib/ruby/3.3.0/rubygems/core_ext/kernel_require.rb>:37
c:0040 p:0017 s:0219 e:000218 TOP    /home/app/vendor/bundle/ruby/3.3.0/gems/activesupport-7.1.2/lib/active_support/core_ext/date.rb:5 [FINISH]
c:0039 p:---- s:0216 e:000215 CFUNC  :require
c:0038 p:0011 s:0211 e:000210 METHOD <internal:/usr/local/lib/ruby/3.3.0/rubygems/core_ext/kernel_require.rb>:37
c:0037 p:0016 s:0205 e:000204 BLOCK  /home/app/vendor/bundle/ruby/3.3.0/gems/activesupport-7.1.2/lib/active_support/core_ext.rb:5 [FINISH]
c:0036 p:---- s:0201 e:000200 CFUNC  :each
c:0035 p:0018 s:0197 e:000196 TOP    /home/app/vendor/bundle/ruby/3.3.0/gems/activesupport-7.1.2/lib/active_support/core_ext.rb:3 [FINISH]
c:0034 p:---- s:0194 e:000193 CFUNC  :require
c:0033 p:0011 s:0189 e:000188 METHOD <internal:/usr/local/lib/ruby/3.3.0/rubygems/core_ext/kernel_require.rb>:37
c:0032 p:0017 s:0183 e:000182 TOP    /home/app/app/sandbox.rb:5 [FINISH]
c:0031 p:---- s:0180 e:000179 CFUNC  :require_relative
c:0030 p:0005 s:0175 e:000174 EVAL   config.ru:3 [FINISH]
c:0029 p:---- s:0172 e:000171 CFUNC  :eval
c:0028 p:0026 s:0165 e:000164 METHOD /home/app/vendor/bundle/ruby/3.3.0/gems/rack-2.2.8/lib/rack/builder.rb:116
c:0027 p:0091 s:0157 e:000156 METHOD /home/app/vendor/bundle/ruby/3.3.0/gems/rack-2.2.8/lib/rack/builder.rb:105
c:0026 p:0021 s:0148 e:000147 METHOD /home/app/vendor/bundle/ruby/3.3.0/gems/rack-2.2.8/lib/rack/builder.rb:66
c:0025 p:0034 s:0141 e:000140 METHOD /home/app/vendor/bundle/ruby/3.3.0/gems/puma-6.4.0/lib/puma/configuration.rb:368
c:0024 p:0014 s:0134 e:000133 METHOD /home/app/vendor/bundle/ruby/3.3.0/gems/puma-6.4.0/lib/puma/configuration.rb:290
c:0023 p:0023 s:0128 e:000127 METHOD /home/app/vendor/bundle/ruby/3.3.0/gems/puma-6.4.0/lib/puma/runner.rb:162
c:0022 p:0009 s:0123 e:000122 METHOD /home/app/vendor/bundle/ruby/3.3.0/gems/puma-6.4.0/lib/puma/single.rb:44
c:0021 p:0033 s:0117 e:000116 METHOD /home/app/vendor/bundle/ruby/3.3.0/gems/puma-6.4.0/lib/puma/launcher.rb:194
c:0020 p:0005 s:0112 e:000111 METHOD /home/app/vendor/bundle/ruby/3.3.0/gems/puma-6.4.0/lib/puma/cli.rb:75
c:0019 p:0018 s:0108 e:000107 TOP    /home/app/vendor/bundle/ruby/3.3.0/gems/puma-6.4.0/bin/puma:10 [FINISH]
c:0018 p:---- s:0104 e:000103 CFUNC  :load
c:0017 p:0078 s:0099 e:000098 TOP    /home/app/vendor/bundle/ruby/3.3.0/bin/puma:25 [FINISH]
c:0016 p:---- s:0094 e:000093 CFUNC  :load
c:0015 p:0064 s:0089 e:000088 METHOD /home/app/vendor/bundle/ruby/3.3.0/gems/bundler-2.4.12/lib/bundler/cli/exec.rb:58
c:0014 p:0050 s:0083 e:000082 METHOD /home/app/vendor/bundle/ruby/3.3.0/gems/bundler-2.4.12/lib/bundler/cli/exec.rb:23
c:0013 p:0034 s:0078 e:000077 METHOD /home/app/vendor/bundle/ruby/3.3.0/gems/bundler-2.4.12/lib/bundler/cli.rb:492
c:0012 p:0054 s:0073 e:000072 METHOD /home/app/vendor/bundle/ruby/3.3.0/gems/bundler-2.4.12/lib/bundler/vendor/thor/lib/thor/command.rb:27
c:0011 p:0040 s:0065 e:000064 METHOD /home/app/vendor/bundle/ruby/3.3.0/gems/bundler-2.4.12/lib/bundler/vendor/thor/lib/thor/invocation.rb:127
c:0010 p:0213 s:0058 e:000057 METHOD /home/app/vendor/bundle/ruby/3.3.0/gems/bundler-2.4.12/lib/bundler/vendor/thor/lib/thor.rb:392
c:0009 p:0008 s:0045 e:000044 METHOD /home/app/vendor/bundle/ruby/3.3.0/gems/bundler-2.4.12/lib/bundler/cli.rb:34
c:0008 p:0044 s:0040 e:000039 METHOD /home/app/vendor/bundle/ruby/3.3.0/gems/bundler-2.4.12/lib/bundler/vendor/thor/lib/thor/base.rb:485
c:0007 p:0022 s:0033 e:000032 METHOD /home/app/vendor/bundle/ruby/3.3.0/gems/bundler-2.4.12/lib/bundler/cli.rb:28
c:0006 p:0058 s:0028 e:000027 BLOCK  /home/app/vendor/bundle/ruby/3.3.0/gems/bundler-2.4.12/exe/bundle:45
c:0005 p:0007 s:0022 e:000021 METHOD /home/app/vendor/bundle/ruby/3.3.0/gems/bundler-2.4.12/lib/bundler/friendly_errors.rb:117
c:0004 p:0125 s:0017 E:0010b8 TOP    /home/app/vendor/bundle/ruby/3.3.0/gems/bundler-2.4.12/exe/bundle:33 [FINISH]
c:0003 p:---- s:0013 e:000012 CFUNC  :load
c:0002 p:0081 s:0008 E:000cb0 EVAL   /usr/local/bin/bundle:25 [FINISH]
c:0001 p:0000 s:0003 E:0023a0 DUMMY  [FINISH]

This does not seem to happen on Intel based machines, e.g. x86_64. I couldn't look to much into it yet, so sadly I have no more information available.
@bensheldon
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bensheldon commented Dec 27, 2023 •
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If this is segfaulting and you aren't using native extensions, a segfault would indicate a problem with the Ruby VM, not Concurrent Ruby. You should file a bug report with Ruby.

See also #1020

@RemcodM
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RemcodM commented Dec 27, 2023

For future reference, it was indeed a bug in the Ruby VM. Tracking https://bugs.ruby-lang.org/issues/20085 now.

@eregon
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eregon commented Dec 27, 2023 •
edited
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I'll keep this one: #1023 open so we hopefully avoid getting a new issue per hour 😅

@eregon eregon mentioned this issue Dec 27, 2023
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@bensheldon @eregon @RemcodM