Issue #18133 has been updated by hsbt (Hiroshi SHIBATA). Assignee set to peterzhu2118 (Peter Zhu) ---------------------------------------- Bug #18133: LTO: TestGCCompact#test_ast_compacts segfaults on i686 https://bugs.ruby-lang.org/issues/18133#change-100297 * Author: vo.x (Vit Ondruch) * Status: Assigned * Priority: Normal * Assignee: peterzhu2118 (Peter Zhu) * ruby -v: ruby 3.0.2p107 (2021-07-07 revision 0db68f0233) [i386-linux] * Backport: 2.6: UNKNOWN, 2.7: UNKNOWN, 3.0: UNKNOWN ---------------------------------------- I observe following segfault running the test suite on i686 on RHEL9: ~~~ $ gdb --args ./miniruby -I./lib -I. -I.ext/common ./tool/runruby.rb --extout=.ext -- --disable-gems ./test/runner.rb --excludes-dir=./test/excludes -v ... snip ... (gdb) handle SIGPIPE noprint nostop pass Signal Stop Print Pass to program Description SIGPIPE No No Yes Broken pipe (gdb) r ... snip ... [ 8347/20497] TestGBK#test_mbc_enc_len = 0.00 s [ 8348/20497] TestGBK#test_mbc_to_code = 0.00 s [ 8349/20497] TestGCCompact#test_ast_compacts--Type <RET> for more, q to quit, c to continue without paging-- Thread 1 "ruby" received signal SIGSEGV, Segmentation fault. 0xf7e33fe6 in rb_class_remove_from_super_subclasses (klass=<optimized out>) at /builddir/build/BUILD/ruby-3.0.2/class.c:96 96 RCLASS_EXT(entry->next->klass)->parent_subclasses = RCLASS_EXT(klass)->parent_subclasses; (gdb) bt #0 0xf7e33fe6 in rb_class_remove_from_super_subclasses (klass=<optimized out>) at /builddir/build/BUILD/ruby-3.0.2/class.c:96 #1 obj_free (obj=<optimized out>, objspace=0x5655ac30) at /builddir/build/BUILD/ruby-3.0.2/gc.c:3019 #2 gc_page_sweep (sweep_page=0x5a40e1f0, heap=0x5655ac48, objspace=0x5655ac30) at /builddir/build/BUILD/ruby-3.0.2/gc.c:4914 #3 gc_sweep_step.isra.0 (objspace=<optimized out>, heap=<optimized out>) at /builddir/build/BUILD/ruby-3.0.2/gc.c:5134 #4 0xf7ca3f09 in gc_sweep_rest (objspace=<optimized out>) at /builddir/build/BUILD/ruby-3.0.2/gc.c:5190 #5 gc_sweep (objspace=0x5655ac30) at /builddir/build/BUILD/ruby-3.0.2/gc.c:5313 #6 0xf7ca8250 in gc_marks (full_mark=<optimized out>, objspace=<optimized out>) at /builddir/build/BUILD/ruby-3.0.2/gc.c:7504 #7 gc_start (objspace=<optimized out>, reason=<optimized out>) at /builddir/build/BUILD/ruby-3.0.2/gc.c:8322 #8 0xf7ca8530 in garbage_collect (objspace=objspace@entry=0x5655ac30, reason=reason@entry=238592) at /builddir/build/BUILD/ruby-3.0.2/gc.c:8210 #9 0xf7caa723 in gc_start_internal (compact=2, immediate_sweep=2, immediate_mark=2, full_mark=2, self=1448715280, ec=0x5655afac) at /builddir/build/BUILD/ruby-3.0.2/gc.c:8553 #10 gc_compact (ec=0x5655afac, self=1448715280) at /builddir/build/BUILD/ruby-3.0.2/gc.c:9468 #11 0xf7dfae3c in invoke_bf (argv=0x0, bf=<optimized out>, reg_cfp=<optimized out>, ec=0x5655afac) at /builddir/build/BUILD/ruby-3.0.2/vm_insnhelper.c:5583 #12 vm_invoke_builtin_delegate (ec=0x5655afac, cfp=<optimized out>, bf=<optimized out>, start_index=0) at /builddir/build/BUILD/ruby-3.0.2/vm_insnhelper.c:5607 #13 0xf7e0664c in vm_exec_core (ec=0x0, initial=1448732852) at /builddir/build/BUILD/ruby-3.0.2/insns.def:1482 #14 0xf7e1d0d5 in rb_vm_exec (ec=<optimized out>, mjit_enable_p=<optimized out>) at /builddir/build/BUILD/ruby-3.0.2/vm.c:2172 #15 0xf7e0c3c9 in invoke_block (captured=<optimized out>, captured=<optimized out>, opt_pc=<optimized out>, type=<optimized out>, cref=0x0, self=1450588460, iseq=0x5669174c, ec=0x5655afac) at /builddir/build/BUILD/ruby-3.0.2/vm_insnhelper.c:399 #16 invoke_iseq_block_from_c (me=0x0, is_lambda=<optimized out>, cref=0x0, passed_block_handler=0, kw_splat=0, argv=0xffffbf00, argc=1, self=1450588460, captured=<optimized out>, ec=0x5655afac) at /builddir/build/BUILD/ruby-3.0.2/vm.c:1335 #17 invoke_block_from_c_bh (force_blockarg=<optimized out>, is_lambda=<optimized out>, cref=<optimized out>, passed_block_handler=<optimized out>, kw_splat=<optimized out>, argv=<optimized out>, argc=<optimized out>, block_handler=<optimized out>, ec=<optimized out>) at /builddir/build/BUILD/ruby-3.0.2/vm.c:1353 #18 vm_yield (kw_splat=0, argv=0xffffbf00, argc=1, ec=0x5655afac) at /builddir/build/BUILD/ruby-3.0.2/vm.c:1398 #19 rb_yield_0 (argv=0xffffbf00, argc=1) at /builddir/build/BUILD/ruby-3.0.2/vm_eval.c:1333 #20 rb_yield (val=<optimized out>) at /builddir/build/BUILD/ruby-3.0.2/vm_eval.c:1349 #21 0xf7c2ae74 in rb_ary_collect (ary=1503666180) at /builddir/build/BUILD/ruby-3.0.2/array.c:3635 #22 0xf7dfc835 in vm_call_cfunc_with_frame (ec=0x5655afac, reg_cfp=0xf77f6d70, calling=0xffffc004) at /builddir/build/BUILD/ruby-3.0.2/vm_insnhelper.c:2929 #23 0xf7dfdd31 in vm_sendish (ec=0x5655afac, reg_cfp=0xf77f6d70, cd=0x566c8f00, block_handler=4152323453, method_explorer=mexp_search_method) at /builddir/build/BUILD/ruby-3.0.2/vm_callinfo.h:336 #24 0xf7e0590a in vm_exec_core (ec=0x0, initial=1448732852) at /builddir/build/BUILD/ruby-3.0.2/insns.def:770 #25 0xf7e1d0d5 in rb_vm_exec (ec=<optimized out>, mjit_enable_p=<optimized out>) at /builddir/build/BUILD/ruby-3.0.2/vm.c:2172 #26 0xf7e0c3c9 in invoke_block (captured=<optimized out>, captured=<optimized out>, opt_pc=<optimized out>, type=<optimized out>, cref=0x0, self=1450588460, iseq=0x56691850, ec=0x5655afac) at /builddir/build/BUILD/ruby-3.0.2/vm_insnhelper.c:399 #27 invoke_iseq_block_from_c (me=0x0, is_lambda=<optimized out>, cref=0x0, passed_block_handler=0, kw_splat=0, argv=0xffffc2b0, argc=1, self=1450588460, captured=<optimized out>, ec=0x5655afac) at /builddir/build/BUILD/ruby-3.0.2/vm.c:1335 #28 invoke_block_from_c_bh (force_blockarg=<optimized out>, is_lambda=<optimized out>, cref=<optimized out>, passed_block_handler=<optimized out>, kw_splat=<optimized out>, argv=<optimized out>, argc=<optimized out>, block_handler=<optimized out>, ec=<optimized out>) at /builddir/build/BUILD/ruby-3.0.2/vm.c:1353 #29 vm_yield (kw_splat=0, argv=0xffffc2b0, argc=1, ec=0x5655afac) at /builddir/build/BUILD/ruby-3.0.2/vm.c:1398 #30 rb_yield_0 (argv=0xffffc2b0, argc=1) at /builddir/build/BUILD/ruby-3.0.2/vm_eval.c:1333 #31 rb_yield (val=<optimized out>) at /builddir/build/BUILD/ruby-3.0.2/vm_eval.c:1349 #32 0xf7c2ac4a in rb_ary_each (ary=<optimized out>) at /builddir/build/BUILD/ruby-3.0.2/array.c:2523 #33 rb_ary_each (ary=1501058480) at /builddir/build/BUILD/ruby-3.0.2/array.c:2517 #34 0xf7dfc835 in vm_call_cfunc_with_frame (ec=0x5655afac, reg_cfp=0xf77f6dfc, calling=0xffffc474) at /builddir/build/BUILD/ruby-3.0.2/vm_insnhelper.c:2929 #35 0xf7e00602 in vm_call_method_each_type (ec=0x5655afac, cfp=0xf77f6dfc, calling=0xffffc474) at /builddir/build/BUILD/ruby-3.0.2/vm_insnhelper.c:3419 #36 0xf7e00a46 in vm_call_refined (calling=<optimized out>, cfp=0xf77f6dfc, ec=0x5655afac) at /builddir/build/BUILD/ruby-3.0.2/vm_insnhelper.c:3398 #37 vm_call_method_each_type (ec=0x5655afac, cfp=0xf77f6dfc, calling=<optimized out>) at /builddir/build/BUILD/ruby-3.0.2/vm_insnhelper.c:3476 #38 0xf7dfdd31 in vm_sendish (ec=0x5655afac, reg_cfp=0xf77f6dfc, cd=0x5669f510, block_handler=4152323593, method_explorer=mexp_search_method) at /builddir/build/BUILD/ruby-3.0.2/vm_callinfo.h:336 #39 0xf7e0590a in vm_exec_core (ec=0x0, initial=1448732852) at /builddir/build/BUILD/ruby-3.0.2/insns.def:770 #40 0xf7e1d0d5 in rb_vm_exec (ec=<optimized out>, mjit_enable_p=<optimized out>) at /builddir/build/BUILD/ruby-3.0.2/vm.c:2172 #41 0xf7e0c3c9 in invoke_block (captured=<optimized out>, captured=<optimized out>, opt_pc=<optimized out>, type=<optimized out>, cref=0x0, self=1450588460, iseq=0x566900cc, ec=0x5655afac) at /builddir/build/BUILD/ruby-3.0.2/vm_insnhelper.c:399 #42 invoke_iseq_block_from_c (me=0x0, is_lambda=<optimized out>, cref=0x0, passed_block_handler=0, kw_splat=0, argv=0xffffc720, argc=1, self=1450588460, captured=<optimized out>, ec=0x5655afac) at /builddir/build/BUILD/ruby-3.0.2/vm.c:1335 #43 invoke_block_from_c_bh (force_blockarg=<optimized out>, is_lambda=<optimized out>, cref=<optimized out>, passed_block_handler=<optimized out>, kw_splat=<optimized out>, argv=<optimized out>, argc=<optimized out>, block_handler=<optimized out>, ec=<optimized out>) at /builddir/build/BUILD/ruby-3.0.2/vm.c:1353 #44 vm_yield (kw_splat=0, argv=0xffffc720, argc=1, ec=0x5655afac) at /builddir/build/BUILD/ruby-3.0.2/vm.c:1398 #45 rb_yield_0 (argv=0xffffc720, argc=1) at /builddir/build/BUILD/ruby-3.0.2/vm_eval.c:1333 #46 rb_yield (val=<optimized out>) at /builddir/build/BUILD/ruby-3.0.2/vm_eval.c:1349 #47 0xf7c2ac4a in rb_ary_each (ary=<optimized out>) at /builddir/build/BUILD/ruby-3.0.2/array.c:2523 --Type <RET> for more, q to quit, c to continue without paging-- #48 rb_ary_each (ary=1501058920) at /builddir/build/BUILD/ruby-3.0.2/array.c:2517 #49 0xf7dfc835 in vm_call_cfunc_with_frame (ec=0x5655afac, reg_cfp=0xf77f6ec0, calling=0xffffc8e4) at /builddir/build/BUILD/ruby-3.0.2/vm_insnhelper.c:2929 #50 0xf7e00602 in vm_call_method_each_type (ec=0x5655afac, cfp=0xf77f6ec0, calling=0xffffc8e4) at /builddir/build/BUILD/ruby-3.0.2/vm_insnhelper.c:3419 #51 0xf7e00a46 in vm_call_refined (calling=<optimized out>, cfp=0xf77f6ec0, ec=0x5655afac) at /builddir/build/BUILD/ruby-3.0.2/vm_insnhelper.c:3398 #52 vm_call_method_each_type (ec=0x5655afac, cfp=0xf77f6ec0, calling=<optimized out>) at /builddir/build/BUILD/ruby-3.0.2/vm_insnhelper.c:3476 #53 0xf7dfdd31 in vm_sendish (ec=0x5655afac, reg_cfp=0xf77f6ec0, cd=0x566cbca0, block_handler=4152323789, method_explorer=mexp_search_method) at /builddir/build/BUILD/ruby-3.0.2/vm_callinfo.h:336 #54 0xf7e0590a in vm_exec_core (ec=0x0, initial=1448732852) at /builddir/build/BUILD/ruby-3.0.2/insns.def:770 #55 0xf7e1d0d5 in rb_vm_exec (ec=<optimized out>, mjit_enable_p=<optimized out>) at /builddir/build/BUILD/ruby-3.0.2/vm.c:2172 #56 0xf7e1da4e in rb_iseq_eval (iseq=0x5657ad18) at /builddir/build/BUILD/ruby-3.0.2/vm.c:2409 #57 0xf7cdb23e in load_iseq_eval (ec=0x5655afac, fname=<optimized out>) at /builddir/build/BUILD/ruby-3.0.2/load.c:594 #58 0xf7ce0ef8 in require_internal (ec=<optimized out>, fname=<optimized out>, exception=<optimized out>) at /builddir/build/BUILD/ruby-3.0.2/load.c:1065 #59 0xf7ce10ce in rb_require_string (fname=1448587920) at /builddir/build/BUILD/ruby-3.0.2/load.c:1142 #60 0xf7ce117c in rb_f_require_relative (obj=1448845900, fname=1448588380) at /builddir/build/BUILD/ruby-3.0.2/load.c:857 #61 0xf7dfc835 in vm_call_cfunc_with_frame (ec=0x5655afac, reg_cfp=0xf77f6fd8, calling=0xffffce04) at /builddir/build/BUILD/ruby-3.0.2/vm_insnhelper.c:2929 #62 0xf7e00602 in vm_call_method_each_type (ec=0x5655afac, cfp=0xf77f6fd8, calling=0xffffce04) at /builddir/build/BUILD/ruby-3.0.2/vm_insnhelper.c:3419 #63 0xf7dfdd31 in vm_sendish (ec=0x5655afac, reg_cfp=0xf77f6fd8, cd=0x56616828, block_handler=0, method_explorer=mexp_search_method) at /builddir/build/BUILD/ruby-3.0.2/vm_callinfo.h:336 #64 0xf7e04d92 in vm_exec_core (ec=0x0, initial=1448732852) at /builddir/build/BUILD/ruby-3.0.2/insns.def:789 #65 0xf7e1d0d5 in rb_vm_exec (ec=<optimized out>, mjit_enable_p=<optimized out>) at /builddir/build/BUILD/ruby-3.0.2/vm.c:2172 #66 0xf7e1db19 in rb_iseq_eval_main (iseq=0x5657b63c) at /builddir/build/BUILD/ruby-3.0.2/vm.c:2420 #67 0xf7c91b99 in rb_ec_exec_node (ec=ec@entry=0x5655afac, n=n@entry=0x5657b63c) at /builddir/build/BUILD/ruby-3.0.2/eval.c:317 #68 0xf7c964fa in ruby_run_node (n=0x5657b63c) at /builddir/build/BUILD/ruby-3.0.2/eval.c:375 #69 0x56556143 in main (argc=<optimized out>, argv=<optimized out>) at ./main.c:50 ~~~ Unfortunately: 1) I don' have better reproducer then to run the whole test suite and even then it is not triggered always. I was not successful to hit the issue running just the single test case or the test file. 2) I have failed to reproduce this on CentOS Stream 9, which is surprising. Luckily, I can reproduce it on my system. This is seems to be related to LTO, because I have never faced such issue with LTO disabled. ---Files-------------------------------- mmap.patch (9.45 KB) mmap.patch (11.1 KB) -- https://bugs.ruby-lang.org/