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Bug #10871
closed
Sclass thread unsafe due to CREF sharing
Added by evanphx (Evan Phoenix) almost 10 years ago. Updated about 9 years ago.
Description
When entering an sclass, the context is tracked via the same cref mechanism used for class and module, specifically on the iseq->cref_stack. The bug is that the cref_stack is the wrong place to put the new cref because the scope is specific only to that sclass body. Mutating and using the iseq->cref_stack causes any code that reads the cref via this cref_stack to incorrectly pick up the sclass instance instead of the proper scope!
This is major thread safety bug because it means that all uses of class << obj are thread-unsafe and can cause random code to fail.
Here is a simple reproduction of the bug: https://gist.github.com/evanphx/6eef92f2c40662a4171b
I attempted to fix the bug by treating an sclass body the same as an eval, which already has special handling for cref's but I don't understand the code enough to make that change quickly.
I believe this is a major bug and hope that ruby-core can address it soon.
Thank you!
Updated by tenderlovemaking (Aaron Patterson) over 9 years ago
I tried to fix this, but I can't figure it out. :(
I tried adding the singleton class to the stack frame. Since the stack frames are thread local, I thought that would at least fix the problem, but it didn't.
Here is the patch I tried:
https://gist.github.com/tenderlove/a8e30c1f764040de7536
I verified that putspecialobject 2 would put the right class on the stack, and I verified that m_core_define_method got the right class, but still your test failed. I don't understand what I'm doing wrong. :(
Updated by ko1 (Koichi Sasada) over 9 years ago
Deterministic example (avoiding non-deterministic).
class C
end
class D
end
$fibs = []
$xs = []
[C, D].each{|klass|
klass.class_eval{
$fibs << Fiber.new{
class << self
class X
$xs << self
CONST = $i
def self.i
CONST
end
def i
CONST
end
end
end
}
}
}
2.times{|i|
$i = i
$fibs[i].resume
}
$xs.each{|x|
p [x::CONST, x.i, x.new.i]
}
To solve this issue, I will duplicate iseq (CREF holder) for sclass. I need to check other cases.
Updated by clay@dabohealth.com (clay shentrup) over 9 years ago
Can anyone update us on the status of this bug? Thanks.
Updated by ko1 (Koichi Sasada) over 9 years ago
I fixed this bug for 2.3 [Bug #10943] and ask to discuss for previous versions. But no discussions....
I will make workaround patch ONLY for this issue. That patch does not solve all of issue, but can solve this issue (this sample code).
Updated by evanphx (Evan Phoenix) over 9 years ago
Koichi, I think a workaround patch to be applied to 2.2 and 2.1 would be very useful.
Updated by glittershark (Griffin Smith) over 9 years ago
I also would very much like a backport of this, as it effectively makes certain bits of "idiomatic" ruby inherently (and very unexpectedly) completely thread-unsafe - see https://github.com/puma/puma/issues/647
Updated by mattbrictson (Matt Brictson) over 9 years ago
I recently opened bug #11153 which may be related. When using threads, methods defined inside class << obj sometimes fail to work. Feel free to close mine as a duplicate if it is the same underlying cause. In any case I would also appreciate a backport. :)
Updated by ko1 (Koichi Sasada) over 9 years ago
- Assignee set to ko1 (Koichi Sasada)
Updated by ko1 (Koichi Sasada) over 9 years ago
This is an ad-hoc fix only for this issue.
Not complete fix. I wrote explanation about it in ChangeLog entry.
Index: insns.def
===================================================================
--- insns.def (revision 50914)
+++ insns.def (working copy)
@@ -914,6 +914,7 @@
(VALUE val)
{
VALUE klass;
+ VALUE class_iseq_val = class_iseq->self;
rb_vm_defineclass_type_t type = VM_DEFINECLASS_TYPE(flags);
switch (type) {
@@ -963,7 +964,17 @@
case VM_DEFINECLASS_TYPE_SINGLETON_CLASS:
/* val is dummy. classdef returns class scope value */
/* super is dummy */
- klass = rb_singleton_class(cbase);
+ {
+ klass = rb_singleton_class(cbase);
+
+ /* Copy iseq to duplicate cref_stack place.
+ * This is ad-hoc solution for [Bug #10871].
+ * and this does not solve more complicated source code with singleton class.
+ * If you need to solve everything, use Ruby 2.3 and later.
+ */
+ class_iseq_val = rb_iseq_clone(class_iseq->self, cbase);
+ GetISeqPtr(class_iseq_val, class_iseq);
+ }
break;
case VM_DEFINECLASS_TYPE_MODULE:
/* val is dummy. classdef returns class scope value */
@@ -998,6 +1009,9 @@
klass, 0, VM_ENVVAL_BLOCK_PTR(GET_BLOCK_PTR()),
class_iseq->iseq_encoded, GET_SP(),
class_iseq->local_size, 0, class_iseq->stack_max);
+
+ RB_GC_GUARD(class_iseq_val);
+
RESTORE_REGS();
NEXT_INSN();
}
ChangeLog
Tue Jun 16 18:17:31 2015 Koichi Sasada <ko1@atdot.net>
* insns.def (defineclass): introduce an ad-hoc patch to avoid
an issue reported on [Bug #10871].
This patch does not fix completely. For example, method definition
in a block (like 1.times{def ...; end}) still causes same issue.
To solve all, we need a huge patch and it seems difficult for
stable branch.
Use Ruby 2.3 and later to solve this issue completely.
(See [Bug #10943])
Updated by nagachika (Tomoyuki Chikanaga) over 9 years ago
Hi, ko1 san.
I applied the ko1's patch on ruby_2_2 branch and make test-rubyspec fails with Segmentation fault.
/Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/rubyspec/core/kernel/fixtures/classes.rb:265: [BUG] Segmentation fault at 0x00000000000000
ruby 2.2.3p137 (2015-06-18 revision 50923) [x86_64-darwin14]
-- 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.
-- Control frame information -----------------------------------------------
c:0031 p:0009 s:0105 e:000104 LAMBDA /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/rubyspec/core/kernel/fixtures/classes.rb:265 [FINISH]
c:0030 p:0009 s:0103 e:000102 BLOCK /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/rubyspec/core/kernel/block_given_spec.rb:15 [FINISH]
c:0029 p:---- s:0101 e:000100 CFUNC :instance_eval
c:0028 p:0013 s:0098 e:000097 METHOD /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/mspec.rb:69
c:0027 p:0017 s:0092 e:000091 BLOCK /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/context.rb:179 [FINISH]
c:0026 p:---- s:0089 e:000088 IFUNC
c:0025 p:---- s:0087 e:000086 CFUNC :each
c:0024 p:---- s:0085 e:000084 CFUNC :all?
c:0023 p:0041 s:0082 e:000081 METHOD /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/context.rb:179
c:0022 p:0073 s:0076 e:000075 BLOCK /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/context.rb:215
c:0021 p:0006 s:0072 e:000071 BLOCK /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/mspec.rb:239 [FINISH]
c:0020 p:---- s:0070 e:000069 CFUNC :times
c:0019 p:0014 s:0067 e:000066 METHOD /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/mspec.rb:238
c:0018 p:0013 s:0064 e:000063 BLOCK /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/context.rb:207 [FINISH]
c:0017 p:---- s:0061 e:000060 CFUNC :each
c:0016 p:0091 s:0058 e:000057 METHOD /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/context.rb:206
c:0015 p:0075 s:0055 e:000054 METHOD /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/mspec.rb:38
c:0014 p:0025 s:0048 e:000047 METHOD /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/object.rb:11
c:0013 p:0063 s:0041 E:001e50 TOP /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/rubyspec/core/kernel/block_given_spec.rb:31 [FINISH]
c:0012 p:---- s:0039 e:000038 CFUNC :load
c:0011 p:0015 s:0035 e:000034 BLOCK /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/mspec.rb:57 [FINISH]
c:0010 p:---- s:0033 e:000032 CFUNC :instance_eval
c:0009 p:0013 s:0030 e:000029 METHOD /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/mspec.rb:69
c:0008 p:0061 s:0024 E:000c98 BLOCK /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/mspec.rb:57 [FINISH]
c:0007 p:---- s:0021 e:000020 CFUNC :each
c:0006 p:0039 s:0018 E:001c08 METHOD /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/mspec.rb:51
c:0005 p:0015 s:0014 e:000013 METHOD /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/mspec.rb:43
c:0004 p:0047 s:0011 e:000010 METHOD /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/commands/mspec-run.rb:92
c:0003 p:0069 s:0008 e:000007 METHOD /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/utils/script.rb:217
c:0002 p:0047 s:0004 E:001da0 EVAL /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/bin/mspec-run:8 [FINISH]
c:0001 p:0000 s:0002 E:001f60 TOP [FINISH]
-- Ruby level backtrace information ----------------------------------------
/Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/bin/mspec-run:8:in `<main>'
/Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/utils/script.rb:217:in `main'
/Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/commands/mspec-run.rb:92:in `run'
/Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/mspec.rb:43:in `process'
/Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/mspec.rb:51:in `files'
/Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/mspec.rb:51:in `each'
/Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/mspec.rb:57:in `block in files'
/Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/mspec.rb:69:in `protect'
/Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/mspec.rb:69:in `instance_eval'
/Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/mspec.rb:57:in `block (2 levels) in files'
/Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/mspec.rb:57:in `load'
/Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/rubyspec/core/kernel/block_given_spec.rb:31:in `<top (required)>'
/Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/object.rb:11:in `describe'
/Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/mspec.rb:38:in `describe'
/Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/context.rb:206:in `process'
/Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/context.rb:206:in `each'
/Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/context.rb:207:in `block in process'
/Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/mspec.rb:238:in `repeat'
/Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/mspec.rb:238:in `times'
/Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/mspec.rb:239:in `block in repeat'
/Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/context.rb:215:in `block (2 levels) in process'
/Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/context.rb:179:in `protect'
/Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/context.rb:179:in `all?'
/Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/context.rb:179:in `each'
/Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/context.rb:179:in `block in protect'
/Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/mspec.rb:69:in `protect'
/Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/mspec.rb:69:in `instance_eval'
/Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/rubyspec/core/kernel/block_given_spec.rb:15:in `block (2 levels) in <top (required)>'
/Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/rubyspec/core/kernel/fixtures/classes.rb:265:in `block in singleton class'
-- Machine register context ------------------------------------------------
rax: 0x0000000000000000 rbx: 0x0000000000000dbb rcx: 0x0000000000000001
rdx: 0x0000000000000000 rdi: 0x0000000000000000 rsi: 0x0000000000000dbb
rbp: 0x00007fff516eccd0 rsp: 0x00007fff516ecc70 r8: 0x0000000000000000
r9: 0x000000010e850338 r10: 0x000000010e94f6a0 r11: 0x00007fee70c09410
r12: 0x0000000000000000 r13: 0x0000000000000dbb r14: 0x0000000000000000
r15: 0x0000000000000000 rip: 0x000000010e67361b rfl: 0x0000000000010246
-- C level backtrace information -------------------------------------------
0 ruby 0x000000010e6af815 rb_vm_bugreport + 149
1 ruby 0x000000010e550e69 rb_bug_context + 473
2 ruby 0x000000010e629933 sigsegv + 83
3 libsystem_platform.dylib 0x00007fff8678df1a _sigtramp + 26
4 ruby 0x000000010e67361b rb_const_get_0 + 235
5 ??? 0x0000000000000007 0x0 + 7
-- Other runtime information -----------------------------------------------
* Loaded script: /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/bin/mspec-run
* Loaded features:
0 enumerator.so
1 rational.so
2 complex.so
3 /Users/nagachika/opt/ruby-2.2/src/build/.ext/x86_64-darwin14/enc/encdb.bundle
4 /Users/nagachika/opt/ruby-2.2/src/build/.ext/x86_64-darwin14/enc/trans/transdb.bundle
5 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/lib/unicode_normalize.rb
6 /Users/nagachika/opt/ruby-2.2/src/build/rbconfig.rb
7 thread.rb
8 /Users/nagachika/opt/ruby-2.2/src/build/.ext/x86_64-darwin14/thread.bundle
9 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/lib/rubygems/compatibility.rb
10 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/lib/rubygems/defaults.rb
11 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/lib/rubygems/deprecate.rb
12 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/lib/rubygems/errors.rb
13 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/lib/rubygems/version.rb
14 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/lib/rubygems/requirement.rb
15 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/lib/rubygems/platform.rb
16 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/lib/rubygems/basic_specification.rb
17 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/lib/rubygems/stub_specification.rb
18 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/lib/rubygems/util/stringio.rb
19 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/lib/rubygems/specification.rb
20 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/lib/rubygems/exceptions.rb
21 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/lib/rubygems/core_ext/kernel_gem.rb
22 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/lib/monitor.rb
23 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/lib/rubygems/core_ext/kernel_require.rb
24 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/lib/rubygems.rb
25 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/utils/version.rb
26 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/version.rb
27 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/utils/options.rb
28 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/context.rb
29 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/exception.rb
30 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/tag.rb
31 /Users/nagachika/opt/ruby-2.2/src/build/.ext/x86_64-darwin14/etc.bundle
32 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/lib/fileutils.rb
33 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/mspec.rb
34 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/actions/tally.rb
35 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/guards/guard.rb
36 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/expectations/expectations.rb
37 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/actions/timer.rb
38 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/runner/formatters/dotted.rb
39 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/utils/script.rb
40 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/commands/mspec-run.rb
41 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/matchers/base.rb
42 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/matchers/be_an_instance_of.rb
43 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/matchers/be_ancestor_of.rb
44 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/matchers/be_close.rb
45 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/matchers/be_computed_by.rb
46 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/matchers/be_computed_by_function.rb
47 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/matchers/be_empty.rb
48 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/matchers/be_false.rb
49 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/matchers/be_kind_of.rb
50 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/matchers/be_nan.rb
51 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/matchers/be_nil.rb
52 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/matchers/be_true.rb
53 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/matchers/be_valid_dns_name.rb
54 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/guards/feature.rb
55 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/helpers/io.rb
56 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/matchers/complain.rb
57 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/matchers/eql.rb
58 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/matchers/equal.rb
59 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/matchers/equal_element.rb
60 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/helpers/encode.rb
61 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/matchers/equal_utf16.rb
62 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/matchers/stringsymboladapter.rb
63 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/matchers/variable.rb
64 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/matchers/have_constant.rb
65 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/matchers/have_class_variable.rb
66 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/matchers/have_data.rb
67 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/matchers/method.rb
68 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/matchers/have_instance_method.rb
69 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/matchers/have_instance_variable.rb
70 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/matchers/have_method.rb
71 /Users/nagachika/opt/ruby-2.2/src/ruby_2_2/spec/mspec/lib/mspec/matchers/have_private_instance_method.rb
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[NOTE]
You may have encountered a bug in the Ruby interpreter or extension libraries.
Bug reports are welcome.
Don't forget to include the above Crash Report log file.
For details: http://www.ruby-lang.org/bugreport.html
crash dump file
Process: ruby [12296]
Path: /Users/USER/*/ruby
Identifier: ruby
Version: 0
Code Type: X86-64 (Native)
Parent Process: make [12294]
Responsible: Terminal [345]
User ID: 501
Date/Time: 2015-06-18 05:59:53.087 +0900
OS Version: Mac OS X 10.10.3 (14D136)
Report Version: 11
Anonymous UUID: 483AEFD5-A87F-0CAA-1FEA-AD4EC10E3D3C
Sleep/Wake UUID: 6903D86A-16DE-44B8-A743-EA3534242F4C
Time Awake Since Boot: 230000 seconds
Time Since Wake: 3100 seconds
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Exception Type: EXC_BAD_ACCESS (SIGABRT)
Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000000
VM Regions Near 0:
-->
__TEXT 000000010e50f000-000000010e73d000 [ 2232K] r-x/rwx SM=COW /Users/USER/*
Application Specific Information:
abort() called
Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0 libsystem_kernel.dylib 0x00007fff867a8286 __pthread_kill + 10
1 libsystem_c.dylib 0x00007fff88d09b53 abort + 129
2 ruby 0x000000010e550c89 die + 9
3 ruby 0x000000010e550ebe rb_bug_context + 558
4 ruby 0x000000010e629933 sigsegv + 83
5 libsystem_platform.dylib 0x00007fff8678df1a _sigtramp + 26
6 ??? 000000000000000000 0 + 0
7 ruby 0x000000010e6abb68 vm_get_ev_const + 824
8 ruby 0x000000010e68d46f vm_exec_core + 1839
9 ruby 0x000000010e6a07a1 vm_exec + 129
10 ruby 0x000000010e6a5b0d invoke_block_from_c + 2461
11 ruby 0x000000010e69f873 vm_invoke_proc + 195
12 ruby 0x000000010e6ade28 vm_call_bmethod + 184
13 ruby 0x000000010e6ac8f7 vm_call_method + 1143
14 ruby 0x000000010e6901e0 vm_exec_core + 13472
15 ruby 0x000000010e6a07a1 vm_exec + 129
16 ruby 0x000000010e6a5b0d invoke_block_from_c + 2461
17 ruby 0x000000010e69def9 yield_under + 393
18 ruby 0x000000010e6ad735 vm_call_cfunc + 1797
19 ruby 0x000000010e6901e0 vm_exec_core + 13472
20 ruby 0x000000010e6a07a1 vm_exec + 129
21 ruby 0x000000010e6a5b0d invoke_block_from_c + 2461
22 ruby 0x000000010e69cc27 rb_yield_values2 + 103
23 ruby 0x000000010e54b9c3 all_iter_i + 19
24 ruby 0x000000010e6a57fe invoke_block_from_c + 1678
25 ruby 0x000000010e69c9c0 rb_yield + 192
26 ruby 0x000000010e5133e9 rb_ary_each + 89
27 ruby 0x000000010e6a9bd3 vm_call0_body + 2435
28 ruby 0x000000010e69d12c iterate_method + 220
29 ruby 0x000000010e69cf69 rb_iterate + 441
30 ruby 0x000000010e69d03d rb_block_call + 45
31 ruby 0x000000010e54790d enum_all + 77
32 ruby 0x000000010e6ad735 vm_call_cfunc + 1797
33 ruby 0x000000010e6901e0 vm_exec_core + 13472
34 ruby 0x000000010e6a07a1 vm_exec + 129
35 ruby 0x000000010e6a5b0d invoke_block_from_c + 2461
36 ruby 0x000000010e69c9c0 rb_yield + 192
37 ruby 0x000000010e5b1578 int_dotimes + 56
38 ruby 0x000000010e6ad735 vm_call_cfunc + 1797
39 ruby 0x000000010e6901e0 vm_exec_core + 13472
40 ruby 0x000000010e6a07a1 vm_exec + 129
41 ruby 0x000000010e6a5b0d invoke_block_from_c + 2461
42 ruby 0x000000010e69c9c0 rb_yield + 192
43 ruby 0x000000010e5133e9 rb_ary_each + 89
44 ruby 0x000000010e6ad735 vm_call_cfunc + 1797
45 ruby 0x000000010e6901e0 vm_exec_core + 13472
46 ruby 0x000000010e6a07a1 vm_exec + 129
47 ruby 0x000000010e6a06ed rb_iseq_eval + 285
48 ruby 0x000000010e55effb rb_load_internal0 + 315
49 ruby 0x000000010e55ecaa rb_f_load + 186
50 ruby 0x000000010e6ad735 vm_call_cfunc + 1797
51 ruby 0x000000010e690400 vm_exec_core + 14016
52 ruby 0x000000010e6a07a1 vm_exec + 129
53 ruby 0x000000010e6a5b0d invoke_block_from_c + 2461
54 ruby 0x000000010e69def9 yield_under + 393
55 ruby 0x000000010e6ad735 vm_call_cfunc + 1797
56 ruby 0x000000010e6ac7ff vm_call_method + 895
57 ruby 0x000000010e6901e0 vm_exec_core + 13472
58 ruby 0x000000010e6a07a1 vm_exec + 129
59 ruby 0x000000010e6a5b0d invoke_block_from_c + 2461
60 ruby 0x000000010e69c9c0 rb_yield + 192
61 ruby 0x000000010e5133e9 rb_ary_each + 89
62 ruby 0x000000010e6ad735 vm_call_cfunc + 1797
63 ruby 0x000000010e6ac7ff vm_call_method + 895
64 ruby 0x000000010e6901e0 vm_exec_core + 13472
65 ruby 0x000000010e6a07a1 vm_exec + 129
66 ruby 0x000000010e6a1378 rb_iseq_eval_main + 504
67 ruby 0x000000010e559c34 ruby_exec_internal + 148
68 ruby 0x000000010e559b5e ruby_run_node + 78
69 ruby 0x000000010e51086f main + 79
70 libdyld.dylib 0x00007fff8b6f45c9 start + 1
Thread 1:: ruby-timer-thr
0 libsystem_kernel.dylib 0x00007fff867a95c2 poll + 10
1 libsystem_pthread.dylib 0x00007fff8b746268 _pthread_body + 131
2 libsystem_pthread.dylib 0x00007fff8b7461e5 _pthread_start + 176
3 libsystem_pthread.dylib 0x00007fff8b74441d thread_start + 13
Thread 0 crashed with X86 Thread State (64-bit):
rax: 0x0000000000000000 rbx: 0x0000000000000006 rcx: 0x00007fee710ecdf8 rdx: 0x0000000000000000
rdi: 0x000000000000091f rsi: 0x0000000000000006 rbp: 0x00007fee710ece20 rsp: 0x00007fee710ecdf8
r8: 0x00007fee710ecdd0 r9: 0x00007fff73a2f300 r10: 0x0000000008000000 r11: 0x0000000000000206
r12: 0x00007fee710ecf50 r13: 0x000000000000005e r14: 0x00007fff73a2f300 r15: 0x000000010e6d24c6
rip: 0x00007fff867a8286 rfl: 0x0000000000000206 cr2: 0x00007fff735f9fd8
Logical CPU: 0
Error Code: 0x02000148
Trap Number: 133
Binary Images:
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0x7fff8c361000 - 0x7fff8c3b5fff libc++.1.dylib (120) <1B9530FD-989B-3174-BB1C-BDC159501710> /usr/lib/libc++.1.dylib
0x7fff8eb63000 - 0x7fff8eb64fff libsystem_secinit.dylib (18) <581DAD0F-6B63-3A48-B63B-917AF799ABAA> /usr/lib/system/libsystem_secinit.dylib
0x7fff8f0f0000 - 0x7fff8f0f8fff libsystem_dnssd.dylib (561.1.1) <62B70ECA-E40D-3C63-896E-7F00EC386DDB> /usr/lib/system/libsystem_dnssd.dylib
0x7fff8f13d000 - 0x7fff8f13dff7 libkeymgr.dylib (28) <77845842-DE70-3CC5-BD01-C3D14227CED5> /usr/lib/system/libkeymgr.dylib
0x7fff8f191000 - 0x7fff8f192ffb libremovefile.dylib (35) <3485B5F4-6CE8-3C62-8DFD-8736ED6E8531> /usr/lib/system/libremovefile.dylib
0x7fff900b0000 - 0x7fff900dbfff libc++abi.dylib (125) <88A22A0F-87C6-3002-BFBA-AC0F2808B8B9> /usr/lib/libc++abi.dylib
0x7fff908df000 - 0x7fff908e0ff7 libsystem_blocks.dylib (65) <9615D10A-FCA7-3BE4-AA1A-1B195DACE1A1> /usr/lib/system/libsystem_blocks.dylib
0x7fff90f54000 - 0x7fff90f59ff7 libunwind.dylib (35.3) <BE7E51A0-B6EA-3A54-9CCA-9D88F683A6D6> /usr/lib/system/libunwind.dylib
0x7fff9127d000 - 0x7fff9127dff7 libunc.dylib (29) <5676F7EA-C1DF-329F-B006-D2C3022B7D70> /usr/lib/system/libunc.dylib
External Modification Summary:
Calls made by other processes targeting this process:
task_for_pid: 3
thread_create: 0
thread_set_state: 0
Calls made by this process:
task_for_pid: 0
thread_create: 0
thread_set_state: 0
Calls made by all processes on this machine:
task_for_pid: 11645119
thread_create: 0
thread_set_state: 0
VM Region Summary:
ReadOnly portion of Libraries: Total=88.5M resident=95.8M(108%) swapped_out_or_unallocated=16777216.0T(19884320751616%)
Writable regions: Total=281.2M written=31.7M(11%) resident=162.4M(58%) swapped_out=0K(0%) unallocated=118.7M(42%)
REGION TYPE VIRTUAL
=========== =======
Kernel Alloc Once 4K
MALLOC 216.6M
MALLOC (admin) 16K
STACK GUARD 4K
Stack 64.0M
VM_ALLOCATE 12K
__DATA 1476K
__LINKEDIT 71.9M
__TEXT 16.6M
__UNICODE 552K
shared memory 4K
=========== =======
TOTAL 371.1M
Updated by ko1 (Koichi Sasada) over 9 years ago
Thank you.
I updated a patch.
Index: insns.def
===================================================================
--- insns.def (revision 50914)
+++ insns.def (working copy)
@@ -914,6 +914,8 @@
(VALUE val)
{
VALUE klass;
+ VALUE class_iseq_val = class_iseq->self;
+ rb_iseq_t *orig_class_iseq = NULL;
rb_vm_defineclass_type_t type = VM_DEFINECLASS_TYPE(flags);
switch (type) {
@@ -963,7 +965,18 @@
case VM_DEFINECLASS_TYPE_SINGLETON_CLASS:
/* val is dummy. classdef returns class scope value */
/* super is dummy */
- klass = rb_singleton_class(cbase);
+ {
+ klass = rb_singleton_class(cbase);
+
+ /* Copy iseq to duplicate cref_stack place.
+ * This is ad-hoc solution for [Bug #10871].
+ * and this does not solve more complicated source code with singleton class.
+ * If you need to solve everything, use Ruby 2.3 and later.
+ */
+ orig_class_iseq = class_iseq;
+ class_iseq_val = rb_iseq_clone(class_iseq->self, cbase);
+ GetISeqPtr(class_iseq_val, class_iseq);
+ }
break;
case VM_DEFINECLASS_TYPE_MODULE:
/* val is dummy. classdef returns class scope value */
@@ -992,6 +1005,9 @@
}
COPY_CREF(class_iseq->cref_stack, vm_cref_push(th, klass, NOEX_PUBLIC, NULL));
+ if (orig_class_iseq) {
+ COPY_CREF(orig_class_iseq->cref_stack, vm_cref_push(th, klass, NOEX_PUBLIC, NULL));
+ }
/* enter scope */
vm_push_frame(th, class_iseq, VM_FRAME_MAGIC_CLASS,
@@ -998,6 +1014,9 @@
klass, 0, VM_ENVVAL_BLOCK_PTR(GET_BLOCK_PTR()),
class_iseq->iseq_encoded, GET_SP(),
class_iseq->local_size, 0, class_iseq->stack_max);
+
+ RB_GC_GUARD(class_iseq_val);
+
RESTORE_REGS();
NEXT_INSN();
}
Updated by nagachika (Tomoyuki Chikanaga) over 9 years ago
ko1 san, thank you for updated patch. I confirmed that make check && make test-rubyspec passed with it.
But, I don't have confidence about the importance of this workaround. It might introduces another regression. I want to deliberate upon this patch with caution. I'll apply it after the next patch release and call for users to validation on ruby_2_2 HEAD.
Updated by nagachika (Tomoyuki Chikanaga) over 9 years ago
Hi,
I pushed a branch containing ko1's patch onto https://github.com/nagachika/ruby/tree/ruby_2_2_singleton_class_threadsafe.
Please test your applications & libraries with it.
Regards,
Updated by nagachika (Tomoyuki Chikanaga) about 9 years ago
- Status changed from Open to Closed
Applied in changeset backport22:r51673.
-
insns.def (defineclass): introduce an ad-hoc patch to avoid
an issue reported on [Bug #10871].This patch does not fix completely. For example, method definition
in a block (like 1.times{def ...; end}) still causes same issue.
To solve all, we need a huge patch and it seems difficult for
stable branch.Use Ruby 2.3 and later to solve this issue completely.
(See [Bug #10943])
Updated by nagachika (Tomoyuki Chikanaga) about 9 years ago
- Backport changed from 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN to 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: DONE
Hello,
I've applied ko1's workaround patch for this issue to ruby_2_2 branch at r51673.
I'm worried about the wrong side effects of this patch.
Please test on ruby_2_2 branch HEAD.
If you use rbenv/ruby-build, you can install ruby_2_2 HEAD via
rbenv install 2.2.0-dev
Regards,
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