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JoshCheek / seeing_is_believing

Displays the results of every line of code in your file
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Handles segfault badly #100

Closed JoshCheek closed 7 years ago

JoshCheek commented 7 years ago 
require 'fiddle'
class Object
  def pop_class
    selfptr  = Fiddle::Pointer[__id__*2]
    classptr = (selfptr+8).ptr
    selfptr[8, 8] = classptr[16, 8]
    classptr.to_value
  end
end

C1  = Class.new     { def head() :C1_superclass_of_C2 end }
C2  = Class.new(C1) { def head() :C2_original_class end }
M1  = Module.new    { def head() :class_that_includes_mod1_into_C2 end }
C2.include(M1)
M2  = Module.new    { def head() :class_that_includes_mod2_into_singleton end }
list = C2.new.extend(M2)
list.instance_eval  { def head() :singleton_class end }

Fiddle::Pointer[list.__id__*2].+(8).ptr.+(536).ptr.to_value # => 
# 584

list.singleton_class.ancestors # => 

list.head       # => 
list.pop_class  # => 
list.head       # => 
list.pop_class  # => 
list.head       # => 
list.pop_class  # => 
list.head       # => 
list.pop_class  # => 
list.head       # => 
list.pop_class  # => 
list.head       # => 

# !> /Users/josh/.gem/ruby/2.3.1/gems/seeing_is_believing-3.1.0/lib/seeing_is_believing/event_stream/producer.rb:54: [BUG] Segmentation fault at 0x00000000000018
# !> ruby 2.3.1p112 (2016-04-26 revision 54768) [x86_64-darwin15]
# !> 
# !> -- Crash Report log information --------------------------------------------
# !>    See Crash Report log file under the one of following:
# !>      * ~/Library/Logs/CrashReporter
# !>      * /Library/Logs/CrashReporter
# !>      * ~/Library/Logs/DiagnosticReports
# !>      * /Library/Logs/DiagnosticReports
# !>    for more details.
# !> Don't forget to include the above Crash Report log file in bug reports.
# !> 
# !> -- Control frame information -----------------------------------------------
# !> c:0003 p:0122 s:0015 e:000013 METHOD /Users/josh/.gem/ruby/2.3.1/gems/seeing_is_believing-3.1.0/lib/seeing_is_believing/event_stream/producer.rb:54
# !> c:0002 p:0199 s:0005 E:000de8 EVAL   /var/folders/7g/mbft22555w3_2nqs_h1kbglw0000gn/T/seeing_is_believing_temp_dir20161224-17706-nwssph/program.rb:19 [FINISH]
# !> c:0001 p:0000 s:0002 E:0022a0 (none) [FINISH]
# !> 
# !> -- Ruby level backtrace information ----------------------------------------
# !> /var/folders/7g/mbft22555w3_2nqs_h1kbglw0000gn/T/seeing_is_believing_temp_dir20161224-17706-nwssph/program.rb:19:in `<main>'
# !> /Users/josh/.gem/ruby/2.3.1/gems/seeing_is_believing-3.1.0/lib/seeing_is_believing/event_stream/producer.rb:54:in `record_result'
# !> 
# !> -- Machine register context ------------------------------------------------
# !>  rax: 0x0000000000000000 rbx: 0x0000000000000ab1 rcx: 0x00007fe2740d4c00
# !>  rdx: 0x00000000000002b1 rdi: 0x0000000000000000 rsi: 0x0000000000000000
# !>  rbp: 0x00007fff55cedf30 rsp: 0x00007fff55cedef0  r8: 0x00007fe275006db8
# !>   r9: 0x00007fe273c06e10 r10: 0x00007fff55cee210 r11: 0x0000000000000000
# !>  r12: 0x0000000000000ab1 r13: 0x0000000000000000 r14: 0x00007fe273c06e10
# !>  r15: 0x0000000000000ab1 rip: 0x000000010a0a2bf5 rfl: 0x0000000000010206
# !> 
# !> -- C level backtrace information -------------------------------------------
# !> 0   ruby                                0x000000010a0bab84 rb_vm_bugreport + 388
# !> 1   ruby                                0x0000000109f557ea rb_bug_context + 490
# !> 2   ruby                                0x000000010a02af64 sigsegv + 68
# !> 3   libsystem_platform.dylib            0x00007fff945e652a _sigtramp + 26
# !> 4   ruby                                0x000000010a0a2bf5 method_entry_get + 229
# !> 5   ???                                 0x00007fff55cedf40 0x0 + 140734633008960
# !> 
# !> -- Other runtime information -----------------------------------------------
# !> 
# !> * Loaded script: /var/folders/7g/mbft22555w3_2nqs_h1kbglw0000gn/T/seeing_is_believing_temp_dir20161224-17706-nwssph/program.rb
# !> 
# !> * Loaded features:
# !> 
# !>     0 enumerator.so
# !>     1 thread.rb
# !>     2 rational.so
# !>     3 complex.so
# !>     4 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/2.3.0/x86_64-darwin15/enc/encdb.bundle
# !>     5 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/2.3.0/x86_64-darwin15/enc/trans/transdb.bundle
# !>     6 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/2.3.0/unicode_normalize.rb
# !>     7 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/2.3.0/x86_64-darwin15/rbconfig.rb
# !>     8 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/site_ruby/2.3.0/rubygems/compatibility.rb
# !>     9 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/site_ruby/2.3.0/rubygems/defaults.rb
# !>    10 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/site_ruby/2.3.0/rubygems/deprecate.rb
# !>    11 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/site_ruby/2.3.0/rubygems/errors.rb
# !>    12 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/site_ruby/2.3.0/rubygems/version.rb
# !>    13 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/site_ruby/2.3.0/rubygems/requirement.rb
# !>    14 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/site_ruby/2.3.0/rubygems/platform.rb
# !>    15 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/site_ruby/2.3.0/rubygems/basic_specification.rb
# !>    16 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/site_ruby/2.3.0/rubygems/stub_specification.rb
# !>    17 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/site_ruby/2.3.0/rubygems/util/list.rb
# !>    18 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/2.3.0/x86_64-darwin15/stringio.bundle
# !>    19 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/site_ruby/2.3.0/rubygems/specification.rb
# !>    20 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/site_ruby/2.3.0/rubygems/exceptions.rb
# !>    21 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/site_ruby/2.3.0/rubygems/core_ext/kernel_gem.rb
# !>    22 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/2.3.0/monitor.rb
# !>    23 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/site_ruby/2.3.0/rubygems/core_ext/kernel_require.rb
# !>    24 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/site_ruby/2.3.0/rubygems.rb
# !>    25 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/site_ruby/2.3.0/rubygems/path_support.rb
# !>    26 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/site_ruby/2.3.0/rubygems/dependency.rb
# !>    27 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/gems/2.3.0/gems/did_you_mean-1.0.0/lib/did_you_mean/version.rb
# !>    28 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/gems/2.3.0/gems/did_you_mean-1.0.0/lib/did_you_mean/core_ext/name_error.rb
# !>    29 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/gems/2.3.0/gems/did_you_mean-1.0.0/lib/did_you_mean/levenshtein.rb
# !>    30 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/gems/2.3.0/gems/did_you_mean-1.0.0/lib/did_you_mean/jaro_winkler.rb
# !>    31 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/gems/2.3.0/gems/did_you_mean-1.0.0/lib/did_you_mean/spell_checkable.rb
# !>    32 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/2.3.0/delegate.rb
# !>    33 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/gems/2.3.0/gems/did_you_mean-1.0.0/lib/did_you_mean/spell_checkers/name_error_checkers/class_name_checker.rb
# !>    34 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/gems/2.3.0/gems/did_you_mean-1.0.0/lib/did_you_mean/spell_checkers/name_error_checkers/variable_name_checker.rb
# !>    35 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/gems/2.3.0/gems/did_you_mean-1.0.0/lib/did_you_mean/spell_checkers/name_error_checkers.rb
# !>    36 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/gems/2.3.0/gems/did_you_mean-1.0.0/lib/did_you_mean/spell_checkers/method_name_checker.rb
# !>    37 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/gems/2.3.0/gems/did_you_mean-1.0.0/lib/did_you_mean/spell_checkers/null_checker.rb
# !>    38 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/gems/2.3.0/gems/did_you_mean-1.0.0/lib/did_you_mean/formatter.rb
# !>    39 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/gems/2.3.0/gems/did_you_mean-1.0.0/lib/did_you_mean.rb
# !>    40 /Users/josh/.gem/ruby/2.3.1/gems/seeing_is_believing-3.1.0/lib/seeing_is_believing/safe.rb
# !>    41 /Users/josh/.gem/ruby/2.3.1/gems/seeing_is_believing-3.1.0/lib/seeing_is_believing/version.rb
# !>    42 /Users/josh/.gem/ruby/2.3.1/gems/seeing_is_believing-3.1.0/lib/seeing_is_believing/hash_struct.rb
# !>    43 /Users/josh/.gem/ruby/2.3.1/gems/seeing_is_believing-3.1.0/lib/seeing_is_believing/event_stream/events.rb
# !>    44 /Users/josh/.gem/ruby/2.3.1/gems/seeing_is_believing-3.1.0/lib/seeing_is_believing/event_stream/producer.rb
# !>    45 /Users/josh/.gem/ruby/2.3.1/gems/seeing_is_believing-3.1.0/lib/seeing_is_believing/the_matrix.rb
# !>    46 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/2.3.0/prettyprint.rb
# !>    47 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/2.3.0/pp.rb
# !>    48 /Users/josh/.gem/ruby/2.3.1/gems/seeing_is_believing-3.1.0/lib/seeing_is_believing/customize_pp.rb
# !>    49 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/2.3.0/x86_64-darwin15/fiddle.bundle
# !>    50 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/2.3.0/fiddle/function.rb
# !>    51 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/2.3.0/fiddle/closure.rb
# !>    52 /Users/josh/.rubies/ruby-2.3.1/lib/ruby/2.3.0/fiddle.rb
# !> 
# !> [NOTE]
# !> You may have encountered a bug in the Ruby interpreter or extension libraries.
# !> Bug reports are welcome.
# !> For details: http://www.ruby-lang.org/bugreport.html
# !> 

__END__
o.m
ptr = Fiddle::Pointer[o.__id__*2]
ptr[8, 8] = ptr.+(8).ptr[0, 8]
o.m

o = C.new
ptr = Fiddle::Pointer.new(
  C.object_id * 2
)
ptr.to_value

[C.object_id * 2].pack('Q')

ptr
.ref
.ref
.ref
.ptr
.ptr
.ptr

# ~> NoMethodError
# ~> undefined method `use' for main:Object
# ~>
# ~> /var/folders/7g/mbft22555w3_2nqs_h1kbglw0000gn/T/seeing_is_believing_temp_dir20161224-16046-1bgqgf2/program.rb:2:in `<main>'/Users/josh/.gem/ruby/2.3.1/gems/seeing_is_believing-3.1.0/lib/seeing_is_believing/binary.rb:61:in `call': undefined method `zero?' for nil:NilClass (NoMethodError)
    from /Users/josh/.gem/ruby/2.3.1/gems/seeing_is_believing-3.1.0/bin/seeing_is_believing:6:in `<top (required)>'
    from /Users/josh/.gem/ruby/2.3.1/bin/seeing_is_believing:22:in `load'
    from /Users/josh/.gem/ruby/2.3.1/bin/seeing_is_believing:22:in `<main>'
/Users/josh/.gem/ruby/2.3.1/gems/seeing_is_believing-3.1.0/lib/seeing_is_believing/binary.rb:61:in `call': undefined method `zero?' for nil:NilClass (NoMethodError)
    from /Users/josh/.gem/ruby/2.3.1/gems/seeing_is_believing-3.1.0/bin/seeing_is_believing:6:in `<top (required)>'
    from /Users/josh/.gem/ruby/2.3.1/bin/seeing_is_believing:22:in `load'
    from /Users/josh/.gem/ruby/2.3.1/bin/seeing_is_believing:22:in `<main>'
/Users/josh/.gem/ruby/2.3.1/gems/seeing_is_believing-3.1.0/lib/seeing_is_believing/binary.rb:61:in `call': undefined method `zero?' for nil:NilClass (NoMethodError)
    from /Users/josh/.gem/ruby/2.3.1/gems/seeing_is_believing-3.1.0/bin/seeing_is_believing:6:in `<top (required)>'
    from /Users/josh/.gem/ruby/2.3.1/bin/seeing_is_believing:22:in `load'
    from /Users/josh/.gem/ruby/2.3.1/bin/seeing_is_believing:22:in `<main>'
/Users/josh/.gem/ruby/2.3.1/gems/seeing_is_believing-3.1.0/lib/seeing_is_believing/binary.rb:61:in `call': undefined method `zero?' for nil:NilClass (NoMethodError)
    from /Users/josh/.gem/ruby/2.3.1/gems/seeing_is_believing-3.1.0/bin/seeing_is_believing:6:in `<top (required)>'
    from /Users/josh/.gem/ruby/2.3.1/bin/seeing_is_believing:22:in `load'
    from /Users/josh/.gem/ruby/2.3.1/bin/seeing_is_believing:22:in `<main>'