[#102652] [Ruby master Bug#17664] Behavior of sockets changed in Ruby 3.0 to non-blocking — ciconia@...
Issue #17664 has been reported by ciconia (Sharon Rosner).
23 messages
2021/02/28
[ruby-core:102387] [Ruby master Bug#17585] DWARF5 support?
From:
xtkoba+ruby@...
Date:
2021-02-03 05:50:07 UTC
List:
ruby-core #102387
Issue #17585 has been updated by xtkoba (Tee KOBAYASHI).
"A segfault in the segfault handler" occurs also on my x86_64-linux and aarch64-linux when `gcc-10.2.0 -gdwarf-5` is used. A backtrace with GDB:
```
(gdb) run -e 'Process.kill :SEGV, $$'
Starting program: /var/tmp/ruby.build/ruby-3.0.0-x86_64-gcc.dwarf5/miniruby -e 'Process.kill :SEGV, $$'
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff7befdf7 in kill () from /lib64/libc.so.6
(gdb) cont
Continuing.
-e:1: [BUG] Segmentation fault at 0x000003e800000a68
ruby 3.0.0p0 (2020-12-25 revision 95aff21468) [x86_64-linux]
-- Control frame information -----------------------------------------------
c:0003 p:---- s:0012 e:000011 CFUNC :kill
c:0002 p:0015 s:0006 e:000005 EVAL -e:1 [FINISH]
c:0001 p:0000 s:0003 E:000ac0 (none) [FINISH]
-- Ruby level backtrace information ----------------------------------------
-e:1:in `<main>'
-e:1:in `kill'
-- Machine register context ------------------------------------------------
RIP: 0x00007ffff7befdf7 RBP: 0x00007fffffffc6d0 RSP: 0x00007fffffffc678
RAX: 0x0000000000000000 RBX: 0x000055555599e0c0 RCX: 0x00007ffff7befdf7
RDX: 0x000000000000000b RDI: 0x0000000000000a68 RSI: 0x000000000000000b
R8: 0x00005555557192c4 R9: 0x0000555555a08228 R10: 0xffffffffffffff3f
R11: 0x0000000000000206 R12: 0x000055555557d2c0 R13: 0x0000000000000000
R14: 0x0000555555adc358 R15: 0x00007ffff7788fa0 EFL: 0x0000000000000206
-- C level backtrace information -------------------------------------------
Program received signal SIGSEGV, Segmentation fault.
uleb128 (p=0x555555a965f8) at addr2line.c:198
198 unsigned char b = *(unsigned char *)(*p)++;
(gdb) bt
#0 uleb128 (p=0x555555a965f8) at addr2line.c:198
#1 0x000055555582f870 in di_read_die (reader=0x555555a965a0, die=0x555555a96390) at addr2line.c:1327
#2 0x000055555582ff4b in debug_info_read (reader=0x555555a965a0, num_traces=23, traces=0x555555998900 <trace>, lines=0x555555adf7c0, offset=0) at addr2line.c:1557
#3 0x0000555555830cc8 in fill_lines (num_traces=23, traces=0x555555998900 <trace>, check_debuglink=1, objp=0x555555a96ea0, lines=0x555555adf7c0, offset=0) at addr2line.c:1813
#4 0x0000555555831554 in rb_dump_backtrace_with_lines (num_traces=23, traces=0x555555998900 <trace>) at addr2line.c:2207
#5 0x000055555582443b in rb_print_backtrace () at vm_dump.c:760
#6 0x00005555558248b2 in rb_vm_bugreport (ctx=0x555555a97240) at vm_dump.c:998
#7 0x0000555555609c11 in rb_bug_for_fatal_signal (default_sighandler=0x0, sig=11, ctx=0x555555a97240, fmt=0x55555587718b "Segmentation fault at %p") at error.c:786
#8 0x0000555555774bc7 in sigsegv (sig=11, info=0x555555a97370, ctx=0x555555a97240) at signal.c:960
#9 <signal handler called>
#10 0x00007ffff7befdf7 in kill () from /lib64/libc.so.6
#11 0x000055555577439d in rb_f_kill (argc=2, argv=0x7ffff7689048) at signal.c:481
(...snip...)
(gdb) p *p
$1 = 0x401 <error: Cannot access memory at address 0x401>
```
I propose the following change as a workaround:
```
--- a/addr2line.c
+++ b/addr2line.c
@@ -1471,7 +1471,7 @@
}
reader->cu_end = reader->p + unit_length;
version = read_uint16(&reader->p);
- if (version > 5) {
+ if (version > 4) {
return -1;
}
else if (version == 5) {
```
----------------------------------------
Bug #17585: DWARF5 support?
https://bugs.ruby-lang.org/issues/17585#change-90254
* Author: vo.x (Vit Ondruch)
* Status: Open
* Priority: Normal
* ruby -v: ruby -v: ruby 3.0.0p0 (2020-12-25 revision 95aff21468) [armv7hl-linux]
* Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN, 3.0: UNKNOWN
----------------------------------------
Fedora recently switched from DWARF4 to DWARF5 and since that time, I observe test suite errors on ppc64le:
~~~
1) Failure:
TestBugReporter#test_bug_reporter_add [/builddir/build/BUILD/ruby-3.0.0/test/-ext-/bug_reporter/test_bug_reporter.rb:24]:
pid 1691449 killed by SIGSEGV (signal 11) (core dumped)
| -:1: [BUG] Segmentation fault at 0x000003e80019cf39
| ruby 3.0.0p0 (2020-12-25 revision 95aff21468) [powerpc64le-linux]
|
| -- Control frame information -----------------------------------------------
| c:0003 p:---- s:0012 e:000011 CFUNC :kill
| c:0002 p:0021 s:0006 e:000005 EVAL -:1 [FINISH]
| c:0001 p:0000 s:0003 E:000480 (none) [FINISH]
|
| -- Ruby level backtrace information ----------------------------------------
| -:1:in `<main>'
| -:1:in `kill'
|
| -- C level backtrace information -------------------------------------------
..
1. [2/2] Assertion for "stderr"
| Expected /Sample bug reporter: 12345/
| to match
| "-- Control frame information -----------------------------------------------\n"+
| "c:0003 p:---- s:0012 e:000011 CFUNC :kill\n"+
| "c:0002 p:0021 s:0006 e:000005 EVAL -:1 [FINISH]\n"+
| "c:0001 p:0000 s:0003 E:000480 (none) [FINISH]\n\n"+
| "-- Ruby level backtrace information ----------------------------------------\n"+
| "-:1:in `<main>'\n"+
| "-:1:in `kill'\n\n"+
| "-- C level backtrace information -------------------------------------------\n"
| after 4 patterns with 119 characters.
2) Failure:
TestRubyOptions#test_segv_loaded_features [/builddir/build/BUILD/ruby-3.0.0/test/ruby/test_rubyoptions.rb:748]:
pid 1721938 killed by SIGSEGV (signal 11) (core dumped)
| -e:1: [BUG] Segmentation fault at 0x000003e8001a4652
| ruby 3.0.0p0 (2020-12-25 revision 95aff21468) [powerpc64le-linux]
|
| -- Control frame information -----------------------------------------------
| c:0003 p:---- s:0012 e:000011 CFUNC :kill
| c:0002 p:0016 s:0006 e:000005 BLOCK -e:1 [FINISH]
| c:0001 p:0000 s:0003 E:000f80 (none) [FINISH]
|
| -- Ruby level backtrace information ----------------------------------------
| -e:1:in `block in <main>'
| -e:1:in `kill'
|
| -- C level backtrace information -------------------------------------------
..
1. [2/2] Assertion for "stderr"
| <""> expected but was
| <"-- C level backtrace information -------------------------------------------\n">.
3) Failure:
TestRubyOptions#test_segv_setproctitle [/builddir/build/BUILD/ruby-3.0.0/test/ruby/test_rubyoptions.rb:762]:
pid 1721957 killed by SIGSEGV (signal 11) (core dumped)
| -e:1: [BUG] Segmentation fault at 0x000003e8001a4665
| ruby 3.0.0p0 (2020-12-25 revision 95aff21468) [powerpc64le-linux]
|
| -- Control frame information -----------------------------------------------
| c:0003 p:---- s:0012 e:000011 CFUNC :kill
| c:0002 p:0029 s:0006 e:000005 EVAL -e:1 [FINISH]
| c:0001 p:0000 s:0003 E:0015c0 (none) [FINISH]
|
| -- Ruby level backtrace information ----------------------------------------
| -e:1:in `<main>'
| -e:1:in `kill'
|
| -- C level backtrace information -------------------------------------------
..
1. [2/2] Assertion for "stderr"
| <""> expected but was
| <"-- C level backtrace information -------------------------------------------\n">.
4) Failure:
TestRubyOptions#test_segv_test [/builddir/build/BUILD/ruby-3.0.0/test/ruby/test_rubyoptions.rb:742]:
pid 1721966 killed by SIGSEGV (signal 11) (core dumped)
| -e:1: [BUG] Segmentation fault at 0x000003e8001a466e
| ruby 3.0.0p0 (2020-12-25 revision 95aff21468) [powerpc64le-linux]
|
| -- Control frame information -----------------------------------------------
| c:0003 p:---- s:0012 e:000011 CFUNC :kill
| c:0002 p:0015 s:0006 e:000005 EVAL -e:1 [FINISH]
| c:0001 p:0000 s:0003 E:001fa0 (none) [FINISH]
|
| -- Ruby level backtrace information ----------------------------------------
| -e:1:in `<main>'
| -e:1:in `kill'
|
| -- C level backtrace information -------------------------------------------
..
1. [2/2] Assertion for "stderr"
| <""> expected but was
| <"-- C level backtrace information -------------------------------------------\n">.
Finished tests in 1111.355067s, 18.8689 tests/s, 2396.5689 assertions/s.
20970 tests, 2663439 assertions, 4 failures, 0 errors, 60 skips
ruby -v: ruby 3.0.0p0 (2020-12-25 revision 95aff21468) [powerpc64le-linux]
~~~
And similar issues on armv7hl:
~~~
1) Failure:
TestBugReporter#test_bug_reporter_add [/builddir/build/BUILD/ruby-3.0.0/test/-ext-/bug_reporter/test_bug_reporter.rb:24]:
pid 722 killed by SIGSEGV (signal 11) (core dumped)
| -:1: [BUG] Segmentation fault at 0x000002d2
| ruby 3.0.0p0 (2020-12-25 revision 95aff21468) [armv7hl-linux]
|
| -- Control frame information -----------------------------------------------
| c:0003 p:---- s:0012 e:000011 CFUNC :kill
| c:0002 p:0021 s:0006 e:000005 EVAL -:1 [FINISH]
| c:0001 p:0000 s:0003 E:000c98 (none) [FINISH]
|
| -- Ruby level backtrace information ----------------------------------------
| -:1:in `<main>'
| -:1:in `kill'
|
| -- Machine register context ------------------------------------------------
| "r0: 0x00000000 "r1: 0x0000000b "r2: 0x00000001 "r3: 0x00000001 "r4: 0x000002d2
| "r5: 0xb689a028 "r6: 0x0000000b "r7: 0x00000025 "r8: 0x00000002 "r9: 0x000002d2
| "r1: 0x00000001 "sp: 0xbe846d1c "fa: 0x00000000
|
| -- C level backtrace information -------------------------------------------
..
1. [2/2] Assertion for "stderr"
| Expected /Sample bug reporter: 12345/
| to match
| "-- Control frame information -----------------------------------------------\n"+
| "c:0003 p:---- s:0012 e:000011 CFUNC :kill\n"+
| "c:0002 p:0021 s:0006 e:000005 EVAL -:1 [FINISH]\n"+
| "c:0001 p:0000 s:0003 E:000c98 (none) [FINISH]\n\n"+
| "-- Ruby level backtrace information ----------------------------------------\n"+
| "-:1:in `<main>'\n"+
| "-:1:in `kill'\n\n"+
| "-- Machine register context ------------------------------------------------\n"+
| " \"r0: 0x00000000 \"r1: 0x0000000b \"r2: 0x00000001 \"r3: 0x00000001 \"r4: 0x000002d2\n"+
| " \"r5: 0xb689a028 \"r6: 0x0000000b \"r7: 0x00000025 \"r8: 0x00000002 \"r9: 0x000002d2\n"+
| " \"r1: 0x00000001 \"sp: 0xbe846d1c \"fa: 0x00000000\n\n"+
| "-- C level backtrace information -------------------------------------------\n"
| after 4 patterns with 107 characters.
2) Failure:
TestRubyOptions#test_segv_loaded_features [/builddir/build/BUILD/ruby-3.0.0/test/ruby/test_rubyoptions.rb:748]:
pid 8085 killed by SIGSEGV (signal 11) (core dumped)
| -e:1: [BUG] Segmentation fault at 0x00001f95
| ruby 3.0.0p0 (2020-12-25 revision 95aff21468) [armv7hl-linux]
|
| -- Control frame information -----------------------------------------------
| c:0003 p:---- s:0012 e:000011 CFUNC :kill
| c:0002 p:0016 s:0006 e:000005 BLOCK -e:1 [FINISH]
| c:0001 p:0000 s:0003 E:000660 (none) [FINISH]
|
| -- Ruby level backtrace information ----------------------------------------
| -e:1:in `block in <main>'
| -e:1:in `kill'
|
| -- Machine register context ------------------------------------------------
| "r0: 0x00000000 "r1: 0x0000000b "r2: 0x00000001 "r3: 0x00000001 "r4: 0x00001f95
| "r5: 0xb68e3028 "r6: 0x0000000b "r7: 0x00000025 "r8: 0x00000002 "r9: 0x00001f95
| "r1: 0x00000001 "sp: 0xbe8c5ac4 "fa: 0x00000000
|
| -- C level backtrace information -------------------------------------------
..
1. [2/2] Assertion for "stderr"
| <""> expected but was
| <"-- C level backtrace information -------------------------------------------\n">.
3) Failure:
TestRubyOptions#test_segv_setproctitle [/builddir/build/BUILD/ruby-3.0.0/test/ruby/test_rubyoptions.rb:762]:
pid 8092 killed by SIGSEGV (signal 11) (core dumped)
| -e:1: [BUG] Segmentation fault at 0x00001f9c
| ruby 3.0.0p0 (2020-12-25 revision 95aff21468) [armv7hl-linux]
|
| -- Control frame information -----------------------------------------------
| c:0003 p:---- s:0012 e:000011 CFUNC :kill
| c:0002 p:0029 s:0006 e:000005 EVAL -e:1 [FINISH]
| c:0001 p:0000 s:0003 E:000550 (none) [FINISH]
|
| -- Ruby level backtrace information ----------------------------------------
| -e:1:in `<main>'
| -e:1:in `kill'
|
| -- Machine register context ------------------------------------------------
| "r0: 0x00000000 "r1: 0x0000000b "r2: 0x00000001 "r3: 0x00000001 "r4: 0x00001f9c
| "r5: 0xb685d028 "r6: 0x0000000b "r7: 0x00000025 "r8: 0x00000002 "r9: 0x00001f9c
| "r1: 0x00000001 "sp: 0xbef7acfc "fa: 0x00000000
|
| -- C level backtrace information -------------------------------------------
..
1. [2/2] Assertion for "stderr"
| <""> expected but was
| <"-- C level backtrace information -------------------------------------------\n">.
4) Failure:
TestRubyOptions#test_segv_test [/builddir/build/BUILD/ruby-3.0.0/test/ruby/test_rubyoptions.rb:742]:
pid 8101 killed by SIGSEGV (signal 11) (core dumped)
| -e:1: [BUG] Segmentation fault at 0x00001fa5
| ruby 3.0.0p0 (2020-12-25 revision 95aff21468) [armv7hl-linux]
|
| -- Control frame information -----------------------------------------------
| c:0003 p:---- s:0012 e:000011 CFUNC :kill
| c:0002 p:0015 s:0006 e:000005 EVAL -e:1 [FINISH]
| c:0001 p:0000 s:0003 E:001f50 (none) [FINISH]
|
| -- Ruby level backtrace information ----------------------------------------
| -e:1:in `<main>'
| -e:1:in `kill'
|
| -- Machine register context ------------------------------------------------
| "r0: 0x00000000 "r1: 0x0000000b "r2: 0x00000001 "r3: 0x00000001 "r4: 0x00001fa5
| "r5: 0xb68bc028 "r6: 0x0000000b "r7: 0x00000025 "r8: 0x00000002 "r9: 0x00001fa5
| "r1: 0x00000001 "sp: 0xbee96d3c "fa: 0x00000000
|
| -- C level backtrace information -------------------------------------------
..
1. [2/2] Assertion for "stderr"
| <""> expected but was
| <"-- C level backtrace information -------------------------------------------\n">.
Finished tests in 1428.305544s, 14.6810 tests/s, 1866.1553 assertions/s.
20969 tests, 2665440 assertions, 4 failures, 0 errors, 56 skips
ruby -v: ruby 3.0.0p0 (2020-12-25 revision 95aff21468) [armv7hl-linux]
~~~
So is it really due to DWARF5? Why is that just on two platforms?
--
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