On Ubuntu 18.04 and Ruby 2.5.1 the EventMachine gem may cause YARV to segfault if the process tries to execute a foreign function from another dynamic library linked to libc++. EventMachine itself links to libstdc++ on Linux so my primary theory is library conflict in runtime.
This repository attempts to provide a minimal reproduction scenario for this issue. It contains two C++ shared libraries with C interfaces: libembuga and libembugb and a number of tests, some of which cause Ruby to segfault.
libembuga.so is built with Clang linked to libc++: the new standard C++ library built for Clang. It exposes one public function: int embuga_demo(int x). The function returns 42 + x if x is bigger than 0 or -1 otherwise. It is exposed to Ruby code as EmbugA.embuga_demo defined in embuga_ffi.rb.
Internally, embuga_demo wraps a C++ class that throws an std::runtime_exception if the passed number is lesser than zero. The function abstract this behavior away by printing "Error!" to STDERR and returning -1.
libembugb.so is built with Clang but, in contrast with libembuga, linked to libstdc++: the “old” standard C++ library used by GCC. It exposes one public function: int embugb_demo(int x) that acts identically to embuga_demo from libembuga.so. It is exposed to Ruby code as EmbugB.embuga_demo defined in embugb_ffi.rb.
I’m trying to confirm a theory that requiring the EventMachine gem affects the behavior of C++ exceptions in loaded dynamic libraries that use libc++. Each test runs the function exposed by each tested library once with a positive number (5) and once with a negative number (-1). Tests that include EventMachine add nothing else but requiring the eventmachine gem in a certain order.
# bundle exec test_a.rb
47
Error!
-1
Expected.
# bundle exec test_b.rb
47
Error!
-1
Expected.
# bundle exec test_a_b.rb
47
Error!
-1
47
Error!
-1
Expected.
47
Error!
-1
47
Error!
-1
Expected.
# bundle exec test_em.rb
Expected.
# bundle exec test_em_a.rb
47
Error!
-1
Expected.
# bundle exec test_a_em.rb
root@93b0624bf022:/checkout/embug-1203# bundle exec test_a_em.rb
47
terminate called after throwing an instance of 'std::runtime_error'
test_a_em.rb:7: [BUG] Segmentation fault at 0x0000000000000000
ruby 2.5.1p57 (2018-03-29 revision 63029) [x86_64-linux-gnu]
-- Control frame information -----------------------------------------------
c:0016 p:---- s:0097 e:000096 CFUNC :embuga_demo
c:0015 p:0047 s:0092 e:000090 TOP test_a_em.rb:7 [FINISH]
c:0014 p:---- s:0088 e:000087 CFUNC :load
c:0013 p:0148 s:0083 e:000082 METHOD /usr/lib/ruby/vendor_ruby/bundler/cli/exec.rb:75
c:0012 p:0075 s:0073 e:000072 METHOD /usr/lib/ruby/vendor_ruby/bundler/cli/exec.rb:28
c:0011 p:0026 s:0068 e:000067 METHOD /usr/lib/ruby/vendor_ruby/bundler/cli.rb:424
c:0010 p:0064 s:0063 e:000062 METHOD /usr/lib/ruby/vendor_ruby/thor/command.rb:27
c:0009 p:0047 s:0055 e:000054 METHOD /usr/lib/ruby/vendor_ruby/thor/invocation.rb:126
c:0008 p:0259 s:0048 e:000047 METHOD /usr/lib/ruby/vendor_ruby/thor.rb:369
c:0007 p:0010 s:0035 e:000034 METHOD /usr/lib/ruby/vendor_ruby/bundler/cli.rb:27
c:0006 p:0062 s:0030 e:000029 METHOD /usr/lib/ruby/vendor_ruby/thor/base.rb:444
c:0005 p:0010 s:0023 e:000022 METHOD /usr/lib/ruby/vendor_ruby/bundler/cli.rb:18
c:0004 p:0079 s:0017 e:000016 BLOCK /usr/bin/bundle:30
c:0003 p:0002 s:0011 e:000010 METHOD /usr/lib/ruby/vendor_ruby/bundler/friendly_errors.rb:122
c:0002 p:0046 s:0006 E:000400 EVAL /usr/bin/bundle:22 [FINISH]
c:0001 p:0000 s:0003 E:001fd0 (none) [FINISH]
-- Ruby level backtrace information ----------------------------------------
/usr/bin/bundle:22:in `<main>'
/usr/lib/ruby/vendor_ruby/bundler/friendly_errors.rb:122:in `with_friendly_errors'
/usr/bin/bundle:30:in `block in <main>'
/usr/lib/ruby/vendor_ruby/bundler/cli.rb:18:in `start'
/usr/lib/ruby/vendor_ruby/thor/base.rb:444:in `start'
/usr/lib/ruby/vendor_ruby/bundler/cli.rb:27:in `dispatch'
/usr/lib/ruby/vendor_ruby/thor.rb:369:in `dispatch'
/usr/lib/ruby/vendor_ruby/thor/invocation.rb:126:in `invoke_command'
/usr/lib/ruby/vendor_ruby/thor/command.rb:27:in `run'
/usr/lib/ruby/vendor_ruby/bundler/cli.rb:424:in `exec'
/usr/lib/ruby/vendor_ruby/bundler/cli/exec.rb:28:in `run'
/usr/lib/ruby/vendor_ruby/bundler/cli/exec.rb:75:in `kernel_load'
/usr/lib/ruby/vendor_ruby/bundler/cli/exec.rb:75:in `load'
test_a_em.rb:7:in `<top (required)>'
test_a_em.rb:7:in `embuga_demo'
-- Machine register context ------------------------------------------------
RIP: 0x00007fd0f5fab873 RBP: 0x00007fd0f9710840 RSP: 0x00007ffcc1616890
RAX: 0x00007fd0f629ab08 RBX: 0x00007fd0f6913350 RCX: 0x000055e9e89d7900
RDX: 0x00007fd0f5fc7000 RDI: 0x00007fd0f629ab08 RSI: 0x000055e9e89d7900
R8: 0x00000000ffffffff R9: 0x00007ffcc1616290 R10: 0x00007fd0f68ea1b0
R11: 0x00007fd0f5fab8c4 R12: 0x000055e9e8a0aa60 R13: 0x00007ffcc1616b00
R14: 0x00007ffcc1616ae0 R15: 0x00007ffcc1616b30 EFL: 0x0000000000010246
-- C level backtrace information -------------------------------------------
/usr/lib/x86_64-linux-gnu/libruby-2.5.so.2.5(0x7fd0f98d2685) [0x7fd0f98d2685]
/usr/lib/x86_64-linux-gnu/libruby-2.5.so.2.5(0x7fd0f98d28bc) [0x7fd0f98d28bc]
/usr/lib/x86_64-linux-gnu/libruby-2.5.so.2.5(0x7fd0f979c884) [0x7fd0f979c884]
/usr/lib/x86_64-linux-gnu/libruby-2.5.so.2.5(0x7fd0f98626c2) [0x7fd0f98626c2]
/lib/x86_64-linux-gnu/libc.so.6(0x7fd0f9362f20) [0x7fd0f9362f20]
/usr/lib/x86_64-linux-gnu/libstdc++.so.6(0x7fd0f5fab873) [0x7fd0f5fab873]
/usr/lib/x86_64-linux-gnu/libstdc++.so.6(0x7fd0f5fb1a06) [0x7fd0f5fb1a06]
/usr/lib/x86_64-linux-gnu/libstdc++.so.6(0x92a41) [0x7fd0f5fb1a41]
/usr/lib/x86_64-linux-gnu/libstdc++.so.6(0x92c74) [0x7fd0f5fb1c74]
/checkout/embug-1203/libembuga/libembuga.so(_ZN6EmbugA4demoEi+0x65) [0x7fd0f6ddf325]
/checkout/embug-1203/libembuga/libembuga.so(embuga_demo+0x2c) [0x7fd0f6ddf1fc]
/var/lib/gems/2.5.0/gems/ffi-1.9.25/lib/ffi_c.so(ffi_call_unix64+0x55) [0x7fd0f6ffb81d]
/var/lib/gems/2.5.0/gems/ffi-1.9.25/lib/ffi_c.so(0x19159) [0x7fd0f6ffb159]
/var/lib/gems/2.5.0/gems/ffi-1.9.25/lib/ffi_c.so(ffi_call+0x66) [0x7fd0f6ffb1d6]
/var/lib/gems/2.5.0/gems/ffi-1.9.25/lib/ffi_c.so(rbffi_CallFunction+0xe7) [0x7fd0f6fefbe7]
/var/lib/gems/2.5.0/gems/ffi-1.9.25/lib/ffi_c.so(0x11424) [0x7fd0f6ff3424]
/usr/lib/x86_64-linux-gnu/libruby-2.5.so.2.5(0x7fd0f98bafa9) [0x7fd0f98bafa9]
/usr/lib/x86_64-linux-gnu/libruby-2.5.so.2.5(0x7fd0f98c94d3) [0x7fd0f98c94d3]
/usr/lib/x86_64-linux-gnu/libruby-2.5.so.2.5(0x7fd0f98c0370) [0x7fd0f98c0370]
/usr/lib/x86_64-linux-gnu/libruby-2.5.so.2.5(0x7fd0f98c5744) [0x7fd0f98c5744]
/usr/lib/x86_64-linux-gnu/libruby-2.5.so.2.5(0x7fd0f97dbb11) [0x7fd0f97dbb11]
/usr/lib/x86_64-linux-gnu/libruby-2.5.so.2.5(0x7fd0f97dc0b8) [0x7fd0f97dc0b8]
/usr/lib/x86_64-linux-gnu/libruby-2.5.so.2.5(0x7fd0f97dc1d0) [0x7fd0f97dc1d0]
/usr/lib/x86_64-linux-gnu/libruby-2.5.so.2.5(0x7fd0f98bafa9) [0x7fd0f98bafa9]
/usr/lib/x86_64-linux-gnu/libruby-2.5.so.2.5(0x7fd0f98c94d3) [0x7fd0f98c94d3]
/usr/lib/x86_64-linux-gnu/libruby-2.5.so.2.5(0x7fd0f98c0370) [0x7fd0f98c0370]
/usr/lib/x86_64-linux-gnu/libruby-2.5.so.2.5(0x7fd0f98c5744) [0x7fd0f98c5744]
/usr/lib/x86_64-linux-gnu/libruby-2.5.so.2.5(0x7fd0f97a00c4) [0x7fd0f97a00c4]
/usr/lib/x86_64-linux-gnu/libruby-2.5.so.2.5(ruby_exec_node+0x1d) [0x7fd0f97a1f4d]
/usr/lib/x86_64-linux-gnu/libruby-2.5.so.2.5(ruby_run_node+0x1e) [0x7fd0f97a442e]
test_a_em.rb(0x55e9e79a28cb) [0x55e9e79a28cb]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7) [0x7fd0f9345b97] ../csu/libc-start.c:310
test_a_em.rb(_start+0x2a) [0x55e9e79a28fa]
-- Other runtime information -----------------------------------------------
* Loaded script: test_a_em.rb
* Loaded features:
0 enumerator.so
1 thread.rb
2 rational.so
3 complex.so
4 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/enc/encdb.so
5 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/enc/trans/transdb.so
6 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/rbconfig.rb
7 /usr/lib/ruby/2.5.0/rubygems/compatibility.rb
8 /usr/lib/ruby/2.5.0/rubygems/defaults.rb
9 /usr/lib/ruby/2.5.0/rubygems/deprecate.rb
10 /usr/lib/ruby/2.5.0/rubygems/errors.rb
11 /usr/lib/ruby/2.5.0/rubygems/version.rb
12 /usr/lib/ruby/2.5.0/rubygems/requirement.rb
13 /usr/lib/ruby/2.5.0/rubygems/platform.rb
14 /usr/lib/ruby/2.5.0/rubygems/basic_specification.rb
15 /usr/lib/ruby/2.5.0/rubygems/stub_specification.rb
16 /usr/lib/ruby/2.5.0/rubygems/util/list.rb
17 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/stringio.so
18 /usr/lib/ruby/2.5.0/uri/rfc2396_parser.rb
19 /usr/lib/ruby/2.5.0/uri/rfc3986_parser.rb
20 /usr/lib/ruby/2.5.0/uri/common.rb
21 /usr/lib/ruby/2.5.0/uri/generic.rb
22 /usr/lib/ruby/2.5.0/uri/ftp.rb
23 /usr/lib/ruby/2.5.0/uri/http.rb
24 /usr/lib/ruby/2.5.0/uri/https.rb
25 /usr/lib/ruby/2.5.0/uri/ldap.rb
26 /usr/lib/ruby/2.5.0/uri/ldaps.rb
27 /usr/lib/ruby/2.5.0/uri/mailto.rb
28 /usr/lib/ruby/2.5.0/uri.rb
29 /usr/lib/ruby/2.5.0/rubygems/specification.rb
30 /usr/lib/ruby/2.5.0/rubygems/exceptions.rb
31 /usr/lib/ruby/vendor_ruby/rubygems/defaults/operating_system.rb
32 /usr/lib/ruby/2.5.0/rubygems/dependency.rb
33 /usr/lib/ruby/2.5.0/rubygems/core_ext/kernel_gem.rb
34 /usr/lib/ruby/2.5.0/monitor.rb
35 /usr/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb
36 /usr/lib/ruby/2.5.0/rubygems.rb
37 /usr/lib/ruby/2.5.0/rubygems/path_support.rb
38 /usr/lib/ruby/vendor_ruby/did_you_mean/version.rb
39 /usr/lib/ruby/vendor_ruby/did_you_mean/core_ext/name_error.rb
40 /usr/lib/ruby/vendor_ruby/did_you_mean/levenshtein.rb
41 /usr/lib/ruby/vendor_ruby/did_you_mean/jaro_winkler.rb
42 /usr/lib/ruby/vendor_ruby/did_you_mean/spell_checker.rb
43 /usr/lib/ruby/2.5.0/delegate.rb
44 /usr/lib/ruby/vendor_ruby/did_you_mean/spell_checkers/name_error_checkers/class_name_checker.rb
45 /usr/lib/ruby/vendor_ruby/did_you_mean/spell_checkers/name_error_checkers/variable_name_checker.rb
46 /usr/lib/ruby/vendor_ruby/did_you_mean/spell_checkers/name_error_checkers.rb
47 /usr/lib/ruby/vendor_ruby/did_you_mean/spell_checkers/method_name_checker.rb
48 /usr/lib/ruby/vendor_ruby/did_you_mean/spell_checkers/key_error_checker.rb
49 /usr/lib/ruby/vendor_ruby/did_you_mean/spell_checkers/null_checker.rb
50 /usr/lib/ruby/vendor_ruby/did_you_mean/formatters/plain_formatter.rb
51 /usr/lib/ruby/vendor_ruby/did_you_mean.rb
52 /usr/lib/ruby/vendor_ruby/bundler/version.rb
53 /usr/lib/ruby/vendor_ruby/bundler/compatibility_guard.rb
54 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/etc.so
55 /usr/lib/ruby/vendor_ruby/bundler/vendor/fileutils/lib/fileutils.rb
56 /usr/lib/ruby/vendor_ruby/bundler/vendored_fileutils.rb
57 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/pathname.so
58 /usr/lib/ruby/2.5.0/pathname.rb
59 /usr/lib/ruby/vendor_ruby/bundler/errors.rb
60 /usr/lib/ruby/vendor_ruby/bundler/environment_preserver.rb
61 /usr/lib/ruby/vendor_ruby/bundler/plugin/api.rb
62 /usr/lib/ruby/vendor_ruby/bundler/plugin.rb
63 /usr/lib/ruby/2.5.0/rubygems/util.rb
64 /usr/lib/ruby/2.5.0/rubygems/source/git.rb
65 /usr/lib/ruby/2.5.0/rubygems/source/installed.rb
66 /usr/lib/ruby/2.5.0/rubygems/source/specific_file.rb
67 /usr/lib/ruby/2.5.0/rubygems/source/local.rb
68 /usr/lib/ruby/2.5.0/rubygems/source/lock.rb
69 /usr/lib/ruby/2.5.0/rubygems/source/vendor.rb
70 /usr/lib/ruby/2.5.0/rubygems/source.rb
71 /usr/lib/ruby/vendor_ruby/bundler/gem_helpers.rb
72 /usr/lib/ruby/vendor_ruby/bundler/match_platform.rb
73 /usr/lib/ruby/vendor_ruby/bundler/rubygems_ext.rb
74 /usr/lib/ruby/2.5.0/rubygems/user_interaction.rb
75 /usr/lib/ruby/2.5.0/rubygems/config_file.rb
76 /usr/lib/ruby/vendor_ruby/bundler/rubygems_integration.rb
77 /usr/lib/ruby/vendor_ruby/bundler/constants.rb
78 /usr/lib/ruby/vendor_ruby/bundler/current_ruby.rb
79 /usr/lib/ruby/vendor_ruby/bundler/build_metadata.rb
80 /usr/lib/ruby/vendor_ruby/bundler.rb
81 /usr/lib/ruby/2.5.0/cgi/core.rb
82 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/cgi/escape.so
83 /usr/lib/ruby/2.5.0/cgi/util.rb
84 /usr/lib/ruby/2.5.0/cgi/cookie.rb
85 /usr/lib/ruby/2.5.0/cgi.rb
86 /usr/lib/ruby/2.5.0/set.rb
87 /usr/lib/ruby/vendor_ruby/thor/command.rb
88 /usr/lib/ruby/vendor_ruby/thor/core_ext/hash_with_indifferent_access.rb
89 /usr/lib/ruby/vendor_ruby/thor/core_ext/ordered_hash.rb
90 /usr/lib/ruby/vendor_ruby/thor/error.rb
91 /usr/lib/ruby/vendor_ruby/thor/invocation.rb
92 /usr/lib/ruby/vendor_ruby/thor/parser/argument.rb
93 /usr/lib/ruby/vendor_ruby/thor/parser/arguments.rb
94 /usr/lib/ruby/vendor_ruby/thor/parser/option.rb
95 /usr/lib/ruby/vendor_ruby/thor/parser/options.rb
96 /usr/lib/ruby/vendor_ruby/thor/parser.rb
97 /usr/lib/ruby/vendor_ruby/thor/shell.rb
98 /usr/lib/ruby/vendor_ruby/thor/line_editor/basic.rb
99 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/readline.so
100 /usr/lib/ruby/vendor_ruby/thor/line_editor/readline.rb
101 /usr/lib/ruby/vendor_ruby/thor/line_editor.rb
102 /usr/lib/ruby/vendor_ruby/thor/util.rb
103 /usr/lib/ruby/vendor_ruby/thor/base.rb
104 /usr/lib/ruby/vendor_ruby/thor.rb
105 /usr/lib/ruby/vendor_ruby/bundler/vendored_thor.rb
106 /usr/lib/ruby/vendor_ruby/bundler/friendly_errors.rb
107 /usr/lib/ruby/vendor_ruby/bundler/cli/common.rb
108 /usr/lib/ruby/vendor_ruby/bundler/settings.rb
109 /usr/lib/ruby/vendor_ruby/bundler/feature_flag.rb
110 /usr/lib/ruby/vendor_ruby/bundler/shared_helpers.rb
111 /usr/lib/ruby/2.5.0/rubygems/ext/builder.rb
112 /usr/lib/ruby/vendor_ruby/bundler/cli/plugin.rb
113 /usr/lib/ruby/vendor_ruby/bundler/cli.rb
114 /usr/lib/ruby/2.5.0/fileutils.rb
115 /usr/lib/ruby/2.5.0/tmpdir.rb
116 /usr/lib/ruby/2.5.0/tempfile.rb
117 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/io/console.so
118 /usr/lib/ruby/vendor_ruby/thor/shell/basic.rb
119 /usr/lib/ruby/vendor_ruby/thor/shell/color.rb
120 /usr/lib/ruby/vendor_ruby/bundler/ui.rb
121 /usr/lib/ruby/vendor_ruby/bundler/ui/silent.rb
122 /usr/lib/ruby/vendor_ruby/bundler/ui/rg_proxy.rb
123 /usr/lib/ruby/vendor_ruby/bundler/ui/shell.rb
124 /usr/lib/ruby/vendor_ruby/bundler/cli/exec.rb
125 /usr/lib/ruby/2.5.0/rubygems/bundler_version_finder.rb
126 /usr/lib/ruby/vendor_ruby/bundler/source.rb
127 /usr/lib/ruby/vendor_ruby/bundler/source/path.rb
128 /usr/lib/ruby/vendor_ruby/bundler/source/git.rb
129 /usr/lib/ruby/vendor_ruby/bundler/source/rubygems.rb
130 /usr/lib/ruby/vendor_ruby/bundler/lockfile_parser.rb
131 /usr/lib/ruby/vendor_ruby/bundler/definition.rb
132 /usr/lib/ruby/vendor_ruby/bundler/dependency.rb
133 /usr/lib/ruby/vendor_ruby/bundler/ruby_dsl.rb
134 /usr/lib/ruby/vendor_ruby/bundler/dsl.rb
135 /usr/lib/ruby/vendor_ruby/bundler/source_list.rb
136 /usr/lib/ruby/vendor_ruby/bundler/source/metadata.rb
137 /usr/lib/ruby/vendor_ruby/bundler/lazy_specification.rb
138 /usr/lib/ruby/vendor_ruby/bundler/index.rb
139 /usr/lib/ruby/2.5.0/tsort.rb
140 /usr/lib/ruby/2.5.0/forwardable/impl.rb
141 /usr/lib/ruby/2.5.0/forwardable.rb
142 /usr/lib/ruby/vendor_ruby/bundler/spec_set.rb
143 /usr/lib/ruby/vendor_ruby/molinillo/compatibility.rb
144 /usr/lib/ruby/vendor_ruby/molinillo/gem_metadata.rb
145 /usr/lib/ruby/vendor_ruby/molinillo/delegates/specification_provider.rb
146 /usr/lib/ruby/vendor_ruby/molinillo/errors.rb
147 /usr/lib/ruby/vendor_ruby/molinillo/dependency_graph/action.rb
148 /usr/lib/ruby/vendor_ruby/molinillo/dependency_graph/add_edge_no_circular.rb
149 /usr/lib/ruby/vendor_ruby/molinillo/dependency_graph/add_vertex.rb
150 /usr/lib/ruby/vendor_ruby/molinillo/dependency_graph/delete_edge.rb
151 /usr/lib/ruby/vendor_ruby/molinillo/dependency_graph/detach_vertex_named.rb
152 /usr/lib/ruby/vendor_ruby/molinillo/dependency_graph/set_payload.rb
153 /usr/lib/ruby/vendor_ruby/molinillo/dependency_graph/tag.rb
154 /usr/lib/ruby/vendor_ruby/molinillo/dependency_graph/log.rb
155 /usr/lib/ruby/vendor_ruby/molinillo/dependency_graph/vertex.rb
156 /usr/lib/ruby/vendor_ruby/molinillo/dependency_graph.rb
157 /usr/lib/ruby/vendor_ruby/molinillo/state.rb
158 /usr/lib/ruby/vendor_ruby/molinillo/modules/specification_provider.rb
159 /usr/lib/ruby/vendor_ruby/molinillo/delegates/resolution_state.rb
160 /usr/lib/ruby/vendor_ruby/molinillo/resolution.rb
161 /usr/lib/ruby/vendor_ruby/molinillo/resolver.rb
162 /usr/lib/ruby/vendor_ruby/molinillo/modules/ui.rb
163 /usr/lib/ruby/vendor_ruby/molinillo.rb
164 /usr/lib/ruby/vendor_ruby/bundler/vendored_molinillo.rb
165 /usr/lib/ruby/vendor_ruby/bundler/resolver/spec_group.rb
166 /usr/lib/ruby/vendor_ruby/bundler/resolver.rb
167 /usr/lib/ruby/vendor_ruby/bundler/gem_version_promoter.rb
168 /usr/lib/ruby/vendor_ruby/bundler/source/gemspec.rb
169 /usr/lib/ruby/vendor_ruby/bundler/runtime.rb
170 /usr/lib/ruby/vendor_ruby/bundler/dep_proxy.rb
171 /usr/lib/ruby/vendor_ruby/bundler/remote_specification.rb
172 /usr/lib/ruby/vendor_ruby/bundler/stub_specification.rb
173 /usr/lib/ruby/vendor_ruby/bundler/endpoint_specification.rb
174 /usr/lib/ruby/vendor_ruby/bundler/ruby_version.rb
175 /usr/lib/ruby/vendor_ruby/bundler/setup.rb
176 /var/lib/gems/2.5.0/gems/ffi-1.9.25/lib/ffi_c.so
177 /var/lib/gems/2.5.0/gems/ffi-1.9.25/lib/ffi/platform.rb
178 /var/lib/gems/2.5.0/gems/ffi-1.9.25/lib/ffi/types.rb
179 /var/lib/gems/2.5.0/gems/ffi-1.9.25/lib/ffi/library.rb
180 /var/lib/gems/2.5.0/gems/ffi-1.9.25/lib/ffi/errno.rb
181 /var/lib/gems/2.5.0/gems/ffi-1.9.25/lib/ffi/pointer.rb
182 /var/lib/gems/2.5.0/gems/ffi-1.9.25/lib/ffi/memorypointer.rb
183 /var/lib/gems/2.5.0/gems/ffi-1.9.25/lib/ffi/struct_layout_builder.rb
184 /var/lib/gems/2.5.0/gems/ffi-1.9.25/lib/ffi/struct.rb
185 /var/lib/gems/2.5.0/gems/ffi-1.9.25/lib/ffi/union.rb
186 /var/lib/gems/2.5.0/gems/ffi-1.9.25/lib/ffi/managedstruct.rb
187 /var/lib/gems/2.5.0/gems/ffi-1.9.25/lib/ffi/callback.rb
188 /var/lib/gems/2.5.0/gems/ffi-1.9.25/lib/ffi/io.rb
189 /var/lib/gems/2.5.0/gems/ffi-1.9.25/lib/ffi/autopointer.rb
190 /var/lib/gems/2.5.0/gems/ffi-1.9.25/lib/ffi/variadic.rb
191 /var/lib/gems/2.5.0/gems/ffi-1.9.25/lib/ffi/enum.rb
192 /var/lib/gems/2.5.0/gems/ffi-1.9.25/lib/ffi/ffi.rb
193 /var/lib/gems/2.5.0/gems/ffi-1.9.25/lib/ffi.rb
194 /checkout/embug-1203/embuga_ffi.rb
195 /var/lib/gems/2.5.0/gems/eventmachine-1.2.7/lib/rubyeventmachine.so
* Process memory map:
55e9e79a2000-55e9e79a3000 r-xp 00000000 08:01 3672492 /usr/bin/ruby2.5
55e9e7ba2000-55e9e7ba3000 r--p 00000000 08:01 3672492 /usr/bin/ruby2.5
55e9e7ba3000-55e9e7ba4000 rw-p 00001000 08:01 3672492 /usr/bin/ruby2.5
55e9e7f67000-55e9e8a62000 rw-p 00000000 00:00 0 [heap]
7fd0f49e6000-7fd0f4b6c000 r--s 00000000 08:01 3803809 /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.25
7fd0f4b6c000-7fd0f5a8e000 r--s 00000000 08:01 1048935 /usr/lib/debug/lib/x86_64-linux-gnu/libc-2.27.so
7fd0f5a8e000-7fd0f5c7e000 r--s 00000000 08:01 3150403 /lib/x86_64-linux-gnu/libc-2.27.so
7fd0f5c7e000-7fd0f5f1f000 r--s 00000000 08:01 3803801 /usr/lib/x86_64-linux-gnu/libruby-2.5.so.2.5.1
7fd0f5f1f000-7fd0f6098000 r-xp 00000000 08:01 3803809 /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.25
7fd0f6098000-7fd0f6298000 ---p 00179000 08:01 3803809 /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.25
7fd0f6298000-7fd0f62a2000 r--p 00179000 08:01 3803809 /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.25
7fd0f62a2000-7fd0f62a4000 rw-p 00183000 08:01 3803809 /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.25
7fd0f62a4000-7fd0f62a8000 rw-p 00000000 00:00 0
7fd0f62a8000-7fd0f62c9000 r-xp 00000000 08:01 1049793 /var/lib/gems/2.5.0/gems/eventmachine-1.2.7/lib/rubyeventmachine.so
7fd0f62c9000-7fd0f64c8000 ---p 00021000 08:01 1049793 /var/lib/gems/2.5.0/gems/eventmachine-1.2.7/lib/rubyeventmachine.so
7fd0f64c8000-7fd0f64ca000 r--p 00020000 08:01 1049793 /var/lib/gems/2.5.0/gems/eventmachine-1.2.7/lib/rubyeventmachine.so
7fd0f64ca000-7fd0f64cb000 rw-p 00022000 08:01 1049793 /var/lib/gems/2.5.0/gems/eventmachine-1.2.7/lib/rubyeventmachine.so
7fd0f64cb000-7fd0f64d2000 r-xp 00000000 08:01 3150468 /lib/x86_64-linux-gnu/librt-2.27.so
7fd0f64d2000-7fd0f66d1000 ---p 00007000 08:01 3150468 /lib/x86_64-linux-gnu/librt-2.27.so
7fd0f66d1000-7fd0f66d2000 r--p 00006000 08:01 3150468 /lib/x86_64-linux-gnu/librt-2.27.so
7fd0f66d2000-7fd0f66d3000 rw-p 00007000 08:01 3150468 /lib/x86_64-linux-gnu/librt-2.27.so
7fd0f66d3000-7fd0f66ea000 r-xp 00000000 08:01 3672332 /lib/x86_64-linux-gnu/libgcc_s.so.1
7fd0f66ea000-7fd0f68e9000 ---p 00017000 08:01 3672332 /lib/x86_64-linux-gnu/libgcc_s.so.1
7fd0f68e9000-7fd0f68ea000 r--p 00016000 08:01 3672332 /lib/x86_64-linux-gnu/libgcc_s.so.1
7fd0f68ea000-7fd0f68eb000 rw-p 00017000 08:01 3672332 /lib/x86_64-linux-gnu/libgcc_s.so.1
7fd0f68eb000-7fd0f6917000 r-xp 00000000 08:01 3803670 /usr/lib/x86_64-linux-gnu/libc++abi.so.1.0
7fd0f6917000-7fd0f6b17000 ---p 0002c000 08:01 3803670 /usr/lib/x86_64-linux-gnu/libc++abi.so.1.0
7fd0f6b17000-7fd0f6b1a000 r--p 0002c000 08:01 3803670 /usr/lib/x86_64-linux-gnu/libc++abi.so.1.0
7fd0f6b1a000-7fd0f6b1b000 rw-p 0002f000 08:01 3803670 /usr/lib/x86_64-linux-gnu/libc++abi.so.1.0
7fd0f6b1b000-7fd0f6bd5000 r-xp 00000000 08:01 3803668 /usr/lib/x86_64-linux-gnu/libc++.so.1.0
7fd0f6bd5000-7fd0f6dd5000 ---p 000ba000 08:01 3803668 /usr/lib/x86_64-linux-gnu/libc++.so.1.0
7fd0f6dd5000-7fd0f6dda000 r--p 000ba000 08:01 3803668 /usr/lib/x86_64-linux-gnu/libc++.so.1.0
7fd0f6dda000-7fd0f6ddb000 rw-p 000bf000 08:01 3803668 /usr/lib/x86_64-linux-gnu/libc++.so.1.0
7fd0f6ddb000-7fd0f6dde000 rw-p 00000000 00:00 0
7fd0f6dde000-7fd0f6de1000 r-xp 00000000 00:51 6498736 /checkout/embug-1203/libembuga/libembuga.so
7fd0f6de1000-7fd0f6fe0000 ---p 00003000 00:51 6498736 /checkout/embug-1203/libembuga/libembuga.so
7fd0f6fe0000-7fd0f6fe1000 r--p 00002000 00:51 6498736 /checkout/embug-1203/libembuga/libembuga.so
7fd0f6fe1000-7fd0f6fe2000 rw-p 00003000 00:51 6498736 /checkout/embug-1203/libembuga/libembuga.so
7fd0f6fe2000-7fd0f7004000 r-xp 00000000 08:01 530773 /var/lib/gems/2.5.0/gems/ffi-1.9.25/lib/ffi_c.so
7fd0f7004000-7fd0f7204000 ---p 00022000 08:01 530773 /var/lib/gems/2.5.0/gems/ffi-1.9.25/lib/ffi_c.so
7fd0f7204000-7fd0f7205000 r--p 00022000 08:01 530773 /var/lib/gems/2.5.0/gems/ffi-1.9.25/lib/ffi_c.so
7fd0f7205000-7fd0f7206000 rw-p 00023000 08:01 530773 /var/lib/gems/2.5.0/gems/ffi-1.9.25/lib/ffi_c.so
7fd0f7206000-7fd0f720a000 r-xp 00000000 08:01 3804442 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/io/console.so
7fd0f720a000-7fd0f7409000 ---p 00004000 08:01 3804442 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/io/console.so
7fd0f7409000-7fd0f740a000 r--p 00003000 08:01 3804442 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/io/console.so
7fd0f740a000-7fd0f740b000 rw-p 00004000 08:01 3804442 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/io/console.so
7fd0f740b000-7fd0f7430000 r-xp 00000000 08:01 3150483 /lib/x86_64-linux-gnu/libtinfo.so.5.9
7fd0f7430000-7fd0f7630000 ---p 00025000 08:01 3150483 /lib/x86_64-linux-gnu/libtinfo.so.5.9
7fd0f7630000-7fd0f7634000 r--p 00025000 08:01 3150483 /lib/x86_64-linux-gnu/libtinfo.so.5.9
7fd0f7634000-7fd0f7635000 rw-p 00029000 08:01 3150483 /lib/x86_64-linux-gnu/libtinfo.so.5.9
7fd0f7635000-7fd0f7676000 r-xp 00000000 08:01 3672338 /lib/x86_64-linux-gnu/libreadline.so.7.0
7fd0f7676000-7fd0f7875000 ---p 00041000 08:01 3672338 /lib/x86_64-linux-gnu/libreadline.so.7.0
7fd0f7875000-7fd0f7877000 r--p 00040000 08:01 3672338 /lib/x86_64-linux-gnu/libreadline.so.7.0
7fd0f7877000-7fd0f787d000 rw-p 00042000 08:01 3672338 /lib/x86_64-linux-gnu/libreadline.so.7.0
7fd0f787d000-7fd0f787e000 rw-p 00000000 00:00 0
7fd0f787e000-7fd0f7885000 r-xp 00000000 08:01 3804460 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/readline.so
7fd0f7885000-7fd0f7a85000 ---p 00007000 08:01 3804460 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/readline.so
7fd0f7a85000-7fd0f7a86000 r--p 00007000 08:01 3804460 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/readline.so
7fd0f7a86000-7fd0f7a87000 rw-p 00008000 08:01 3804460 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/readline.so
7fd0f7a87000-7fd0f7a8a000 r-xp 00000000 08:01 3804363 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/cgi/escape.so
7fd0f7a8a000-7fd0f7c89000 ---p 00003000 08:01 3804363 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/cgi/escape.so
7fd0f7c89000-7fd0f7c8a000 r--p 00002000 08:01 3804363 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/cgi/escape.so
7fd0f7c8a000-7fd0f7c8b000 rw-p 00003000 08:01 3804363 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/cgi/escape.so
7fd0f7c8b000-7fd0f7c92000 r-xp 00000000 08:01 3804452 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/pathname.so
7fd0f7c92000-7fd0f7e91000 ---p 00007000 08:01 3804452 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/pathname.so
7fd0f7e91000-7fd0f7e92000 r--p 00006000 08:01 3804452 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/pathname.so
7fd0f7e92000-7fd0f7e93000 rw-p 00007000 08:01 3804452 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/pathname.so
7fd0f7e93000-7fd0f7e99000 r-xp 00000000 08:01 3804436 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/etc.so
7fd0f7e99000-7fd0f8098000 ---p 00006000 08:01 3804436 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/etc.so
7fd0f8098000-7fd0f8099000 r--p 00005000 08:01 3804436 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/etc.so
7fd0f8099000-7fd0f809a000 rw-p 00006000 08:01 3804436 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/etc.so
7fd0f809a000-7fd0f80a1000 r-xp 00000000 08:01 3804464 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/stringio.so
7fd0f80a1000-7fd0f82a1000 ---p 00007000 08:01 3804464 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/stringio.so
7fd0f82a1000-7fd0f82a2000 r--p 00007000 08:01 3804464 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/stringio.so
7fd0f82a2000-7fd0f82a3000 rw-p 00008000 08:01 3804464 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/stringio.so
7fd0f82a3000-7fd0f82a5000 r-xp 00000000 08:01 3804422 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/enc/trans/transdb.so
7fd0f82a5000-7fd0f84a5000 ---p 00002000 08:01 3804422 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/enc/trans/transdb.so
7fd0f84a5000-7fd0f84a6000 r--p 00002000 08:01 3804422 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/enc/trans/transdb.so
7fd0f84a6000-7fd0f84a7000 rw-p 00003000 08:01 3804422 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/enc/trans/transdb.so
7fd0f84a7000-7fd0f84a9000 r-xp 00000000 08:01 3804379 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/enc/encdb.so
7fd0f84a9000-7fd0f86a8000 ---p 00002000 08:01 3804379 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/enc/encdb.so
7fd0f86a8000-7fd0f86a9000 r--p 00001000 08:01 3804379 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/enc/encdb.so
7fd0f86a9000-7fd0f86aa000 rw-p 00002000 08:01 3804379 /usr/lib/x86_64-linux-gnu/ruby/2.5.0/enc/encdb.so
7fd0f86aa000-7fd0f8847000 r-xp 00000000 08:01 3150428 /lib/x86_64-linux-gnu/libm-2.27.so
7fd0f8847000-7fd0f8a46000 ---p 0019d000 08:01 3150428 /lib/x86_64-linux-gnu/libm-2.27.so
7fd0f8a46000-7fd0f8a47000 r--p 0019c000 08:01 3150428 /lib/x86_64-linux-gnu/libm-2.27.so
7fd0f8a47000-7fd0f8a48000 rw-p 0019d000 08:01 3150428 /lib/x86_64-linux-gnu/libm-2.27.so
7fd0f8a48000-7fd0f8a51000 r-xp 00000000 08:01 3150411 /lib/x86_64-linux-gnu/libcrypt-2.27.so
7fd0f8a51000-7fd0f8c50000 ---p 00009000 08:01 3150411 /lib/x86_64-linux-gnu/libcrypt-2.27.so
7fd0f8c50000-7fd0f8c51000 r--p 00008000 08:01 3150411 /lib/x86_64-linux-gnu/libcrypt-2.27.so
7fd0f8c51000-7fd0f8c52000 rw-p 00009000 08:01 3150411 /lib/x86_64-linux-gnu/libcrypt-2.27.so
7fd0f8c52000-7fd0f8c80000 rw-p 00000000 00:00 0
7fd0f8c80000-7fd0f8c83000 r-xp 00000000 08:01 3150413 /lib/x86_64-linux-gnu/libdl-2.27.so
7fd0f8c83000-7fd0f8e82000 ---p 00003000 08:01 3150413 /lib/x86_64-linux-gnu/libdl-2.27.so
7fd0f8e82000-7fd0f8e83000 r--p 00002000 08:01 3150413 /lib/x86_64-linux-gnu/libdl-2.27.so
7fd0f8e83000-7fd0f8e84000 rw-p 00003000 08:01 3150413 /lib/x86_64-linux-gnu/libdl-2.27.so
7fd0f8e84000-7fd0f8f03000 r-xp 00000000 08:01 3281088 /usr/lib/x86_64-linux-gnu/libgmp.so.10.3.2
7fd0f8f03000-7fd0f9103000 ---p 0007f000 08:01 3281088 /usr/lib/x86_64-linux-gnu/libgmp.so.10.3.2
7fd0f9103000-7fd0f9104000 r--p 0007f000 08:01 3281088 /usr/lib/x86_64-linux-gnu/libgmp.so.10.3.2
7fd0f9104000-7fd0f9105000 rw-p 00080000 08:01 3281088 /usr/lib/x86_64-linux-gnu/libgmp.so.10.3.2
7fd0f9105000-7fd0f911f000 r-xp 00000000 08:01 3150464 /lib/x86_64-linux-gnu/libpthread-2.27.so
7fd0f911f000-7fd0f931e000 ---p 0001a000 08:01 3150464 /lib/x86_64-linux-gnu/libpthread-2.27.so
7fd0f931e000-7fd0f931f000 r--p 00019000 08:01 3150464 /lib/x86_64-linux-gnu/libpthread-2.27.so
7fd0f931f000-7fd0f9320000 rw-p 0001a000 08:01 3150464 /lib/x86_64-linux-gnu/libpthread-2.27.so
7fd0f9320000-7fd0f9324000 rw-p 00000000 00:00 0
7fd0f9324000-7fd0f950b000 r-xp 00000000 08:01 3150403 /lib/x86_64-linux-gnu/libc-2.27.so
7fd0f950b000-7fd0f970b000 ---p 001e7000 08:01 3150403 /lib/x86_64-linux-gnu/libc-2.27.so
7fd0f970b000-7fd0f970f000 r--p 001e7000 08:01 3150403 /lib/x86_64-linux-gnu/libc-2.27.so
7fd0f970f000-7fd0f9711000 rw-p 001eb000 08:01 3150403 /lib/x86_64-linux-gnu/libc-2.27.so
7fd0f9711000-7fd0f9715000 rw-p 00000000 00:00 0
7fd0f9715000-7fd0f99af000 r-xp 00000000 08:01 3803801 /usr/lib/x86_64-linux-gnu/libruby-2.5.so.2.5.1
7fd0f99af000-7fd0f9bae000 ---p 0029a000 08:01 3803801 /usr/lib/x86_64-linux-gnu/libruby-2.5.so.2.5.1
7fd0f9bae000-7fd0f9bb4000 r--p 00299000 08:01 3803801 /usr/lib/x86_64-linux-gnu/libruby-2.5.so.2.5.1
7fd0f9bb4000-7fd0f9bb5000 rw-p 0029f000 08:01 3803801 /usr/lib/x86_64-linux-gnu/libruby-2.5.so.2.5.1
7fd0f9bb5000-7fd0f9bc5000 rw-p 00000000 00:00 0
7fd0f9bc5000-7fd0f9bec000 r-xp 00000000 08:01 3150385 /lib/x86_64-linux-gnu/ld-2.27.so
7fd0f9c76000-7fd0f9c7b000 r--s 00000000 00:51 6498736 /checkout/embug-1203/libembuga/libembuga.so
7fd0f9c7b000-7fd0f9c7d000 r--s 00000000 08:01 3672492 /usr/bin/ruby2.5
7fd0f9c7d000-7fd0f9de6000 rw-p 00000000 00:00 0
7fd0f9de6000-7fd0f9de7000 r-xp 00000000 00:00 0
7fd0f9de7000-7fd0f9de8000 ---p 00000000 00:00 0
7fd0f9de8000-7fd0f9dec000 rw-p 00000000 00:00 0
7fd0f9dec000-7fd0f9ded000 r--p 00027000 08:01 3150385 /lib/x86_64-linux-gnu/ld-2.27.so
7fd0f9ded000-7fd0f9dee000 rw-p 00028000 08:01 3150385 /lib/x86_64-linux-gnu/ld-2.27.so
7fd0f9dee000-7fd0f9def000 rw-p 00000000 00:00 0
7ffcc0e1b000-7ffcc161a000 rw-p 00000000 00:00 0 [stack]
7ffcc1792000-7ffcc1794000 r--p 00000000 00:00 0 [vvar]
7ffcc1794000-7ffcc1796000 r-xp 00000000 00:00 0 [vdso]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall]
[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
Aborted
Issue reproduced.
# bundle exec test_em_b.rb
47
Error!
-1
Expected.
# bundle exec test_em_b.rb
47
Error!
-1
Expected.
The segfault can only be reproduced when eventmachine is loaded after (order matters) a library linked against libc++. Further investigation is required to find the cause of this issue.