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Merged
acj merged 1 commit into from
Aug 31, 2025
Merged

Add coredump with more complicated class data #7

acj merged 1 commit into from
Aug 31, 2025

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@dalehamel
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@dalehamel dalehamel commented Aug 21, 2025 •
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Adds a ruby 3.3.0 coredump that is a version of the infinite sleep program, but with the functions inside of some nested classes.

I was ran it with this test program:

if ARGV.length == 1
    $sleep_time = ARGV[0].to_i
else
    $sleep_time = 0.5
end

class A
  def aaa()
      sleep($sleep_time)
  end
end

class B
  class Ab
    def bbb()
        A::new.aaa()
    end
  end
end

class C
  class Cb
    def ccc()
        B::Ab.new.bbb()
    end
  end
end

def looper
  loop do
      C::Cb.new.ccc()
  end
end

looper

For which I expect something like:

<main> - /Users/dalehamel/src/github.com/rbspy/rbspy/ci/ruby-programs/infinite_on_cpu_with_classes.rb:35
Object#looper - /Users/dalehamel/src/github.com/rbspy/rbspy/ci/ruby-programs/infinite_on_cpu_with_classes.rb:33
loop - unknown:173
block in looper - /Users/dalehamel/src/github.com/rbspy/rbspy/ci/ruby-programs/infinite_on_cpu_with_classes.rb:32
C::Cb#ccc - /Users/dalehamel/src/github.com/rbspy/rbspy/ci/ruby-programs/infinite_on_cpu_with_classes.rb:25
B::Ab#bbb - /Users/dalehamel/src/github.com/rbspy/rbspy/ci/ruby-programs/infinite_on_cpu_with_classes.rb:17
A#aaa - /Users/dalehamel/src/github.com/rbspy/rbspy/ci/ruby-programs/infinite_on_cpu_with_classes.rb:10
sleep [c function] - (unknown)

When i try running the tests pointing at my local crate though, it shits the bed trying to allocate and absurd amount of memory...

ok
memory allocation of 140720308515840 bytes failed
error: test failed, to rerun pass `--lib`

@dalehamel dalehamel marked this pull request as draft August 21, 2025 12:59
@dalehamel dalehamel mentioned this pull request Aug 21, 2025
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@dalehamel
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dalehamel commented Aug 25, 2025

Ok i found the source of the memory allocation error - ruby was legitimately reporting the size of the string to be that large when reading the absolute path 😅

I created a workaround in my PR to allow a maximum size to read, and set this to the maximum path size of 4096.

@dalehamel dalehamel marked this pull request as ready for review August 25, 2025 17:14
@acj acj merged commit e64ac75 into rbspy:main Aug 31, 2025
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@dalehamel @acj