[ruby-core:125979] [Ruby Bug#22188] Debug symbols missing when compiled with GCC LTO
Issue #22188 has been reported by rwstauner (Randy Stauner). ---------------------------------------- Bug #22188: Debug symbols missing when compiled with GCC LTO https://bugs.ruby-lang.org/issues/22188 * Author: rwstauner (Randy Stauner) * Status: Open * Backport: 3.3: UNKNOWN, 3.4: UNKNOWN, 4.0: UNKNOWN ---------------------------------------- When compiling with LTO (the XCFLAGS and XLDFLAGS below) RUBY_CRASH_REPORT does not resolve symbols. ( export optflags="-O3" cflags="-fno-omit-frame-pointer" export XCFLAGS="-flto=auto -ffat-lto-objects -Werror=lto-type-mismatch" export XLDFLAGS="-flto=auto -ffat-lto-objects" ./configure --disable-install-doc --disable-shared make -j miniruby ) Simple crash simulation: ./miniruby -e 'Process.kill("SEGV", $$)' On master the output includes: -- C level backtrace information ------------------------------------------- /src/miniruby(0x5608c71bafdd) [0x5608c71bafdd] /src/miniruby(0x5608c71c6f46) [0x5608c71c6f46] /src/miniruby(0x5608c6f31370) [0x5608c6f31370] /src/miniruby(0x5608c70e3150) [0x5608c70e3150] /usr/lib/libc.so.6(0x7f62122ac2d0) [0x7f62122ac2d0] /usr/lib/libc.so.6(kill+0xb) [0x7f62122ac4db] /src/miniruby(0x5608c70e1a65) [0x5608c70e1a65] /src/miniruby(0x5608c7189d1e) [0x5608c7189d1e] /src/miniruby(0x5608c718dea7) [0x5608c718dea7] /src/miniruby(0x5608c719417e) [0x5608c719417e] /src/miniruby(0x5608c71b793c) [0x5608c71b793c] /src/miniruby(0x5608c6f3d13c) [0x5608c6f3d13c] /src/miniruby(0x5608c6f42321) [0x5608c6f42321] /src/miniruby(0x5608c6e4f9b3) [0x5608c6e4f9b3] /usr/lib/libc.so.6(0x7f62122956c1) [0x7f62122956c1] /usr/lib/libc.so.6(__libc_start_main+0x89) [0x7f62122957f9] [0x5608c6e4f9f5] With a tiny change to fall back to symtab (even after parsing DWARF) we can get (empty lines added for comparison with next block): -- C level backtrace information ------------------------------------------- /src/miniruby(rb_print_backtrace+0x1d) [0x55f6397aafdd] /src/vm_dump.c:1111 /src/miniruby(rb_vm_bugreport+0xa26) [0x55f6397b6f46] /src/vm_dump.c:1473 /src/miniruby(rb_bug_for_fatal_signal+0x110) [0x55f639521370] /src/error.c:1140 /src/miniruby(sigsegv+0x50) [0x55f6396d3150] /src/signal.c:948 /usr/lib/libc.so.6(0x7f991555d2d0) [0x7f991555d2d0] /usr/lib/libc.so.6(kill+0xb) [0x7f991555d4db] /src/miniruby(rb_f_kill+0x205) [0x55f6396d1a65] /src/signal.c:487 /src/miniruby(vm_call_cfunc_with_frame_+0xfe) [0x55f639779d1e] /src/vm_insnhelper.c:3821 /src/miniruby(vm_sendish.constprop.0+0xb7) [0x55f63977dea7] /src/vm_insnhelper.c:6056 /src/miniruby(vm_exec_core.lto_priv.0+0x6e) [0x55f63978417e] /src/insns.def:909 /src/miniruby(rb_vm_exec+0xec) [0x55f6397a793c] /src/vm.c:2825 /src/miniruby(rb_ec_exec_node+0xac) [0x55f63952d13c] /src/eval.c:284 /src/miniruby(ruby_run_node+0x61) [0x55f639532321] /src/eval.c:322 /src/miniruby(main+0x63) [0x55f63943f9b3] ./main.c:42 PR: https://github.com/ruby/ruby/pull/17743 Currently the code in addr2line.c has a stub: case DW_FORM_ref_addr: goto finish; /* not supported yet */ If we add support for that we can get better names and inlined frames (empty lines added for comparison with previous block): -- C level backtrace information ------------------------------------------- /src/miniruby(rb_print_backtrace+0x1d) [0x55cd045f81dd] /src/vm_dump.c:1111 /src/miniruby(fprintf+0x0) [0x55cd04604146] /src/vm_dump.c:1473 /src/miniruby(rb_vm_bugreport) /src/vm_dump.c:1476 /src/miniruby(rb_bug_for_fatal_signal+0x110) [0x55cd0436e370] /src/error.c:1140 /src/miniruby(sigsegv+0x50) [0x55cd04520150] /src/signal.c:948 /usr/lib/libc.so.6(0x7f9ef85522d0) [0x7f9ef85522d0] /usr/lib/libc.so.6(kill+0xb) [0x7f9ef85524db] /src/miniruby(rb_f_kill+0x205) [0x55cd0451ea65] /src/signal.c:487 /src/miniruby(vm_call_cfunc_with_frame_+0xfe) [0x55cd045c6f1e] /src/vm_insnhelper.c:3821 /src/miniruby(vm_sendish+0xb7) [0x55cd045cb0a7] /src/vm_insnhelper.c:6056 /src/miniruby(vm_exec_core+0x6e) [0x55cd045d137e] /src/insns.def:909 /src/miniruby(vm_exec_loop+0x16) [0x55cd045f4b3c] /src/vm.c:2825 /src/miniruby(rb_vm_exec) /src/vm.c:2801 /src/miniruby(rb_ec_exec_node+0xac) [0x55cd0437a13c] /src/eval.c:284 /src/miniruby(ruby_run_node+0x61) [0x55cd0437f321] /src/eval.c:322 /src/miniruby(rb_main+0x22) [0x55cd0428c9b3] ./main.c:42 /src/miniruby(main) ./main.c:62 /usr/lib/libc.so.6(0x7f9ef853b6c1) [0x7f9ef853b6c1] /usr/lib/libc.so.6(__libc_start_main+0x89) [0x7f9ef853b7f9] /src/miniruby(_start+0x25) [0x55cd0428c9f5] ./main.c:63 PR: https://github.com/ruby/ruby/pull/17744 -- https://bugs.ruby-lang.org/
Issue #22188 has been updated by luke-gru (Luke Gruber). Assignee set to luke-gru (Luke Gruber) Backport changed from 3.3: UNKNOWN, 3.4: UNKNOWN, 4.0: UNKNOWN to 3.3: UNKNOWN, 3.4: UNKNOWN, 4.0: REQUIRED In my opinion this deserves a backport. We are using LTO in production in some of our apps (Ruby 4.0.x) and not having backtraces makes debugging considerably harder. [PR here](https://github.com/ruby/ruby/pull/17744). ---------------------------------------- Bug #22188: addr2line doesn't find symbols when compiled with GCC LTO https://bugs.ruby-lang.org/issues/22188#change-118100 * Author: rwstauner (Randy Stauner) * Status: Open * Assignee: luke-gru (Luke Gruber) * Backport: 3.3: UNKNOWN, 3.4: UNKNOWN, 4.0: REQUIRED ---------------------------------------- When compiling with LTO (the XCFLAGS and XLDFLAGS below) RUBY_CRASH_REPORT does not resolve symbols. ( export optflags="-O3" cflags="-fno-omit-frame-pointer" export XCFLAGS="-flto=auto -ffat-lto-objects -Werror=lto-type-mismatch" export XLDFLAGS="-flto=auto -ffat-lto-objects" ./configure --disable-install-doc --disable-shared make -j miniruby ) Simple crash simulation: ./miniruby -e 'Process.kill("SEGV", $$)' On master the output includes: -- C level backtrace information ------------------------------------------- /src/miniruby(0x5608c71bafdd) [0x5608c71bafdd] /src/miniruby(0x5608c71c6f46) [0x5608c71c6f46] /src/miniruby(0x5608c6f31370) [0x5608c6f31370] /src/miniruby(0x5608c70e3150) [0x5608c70e3150] /usr/lib/libc.so.6(0x7f62122ac2d0) [0x7f62122ac2d0] /usr/lib/libc.so.6(kill+0xb) [0x7f62122ac4db] /src/miniruby(0x5608c70e1a65) [0x5608c70e1a65] /src/miniruby(0x5608c7189d1e) [0x5608c7189d1e] /src/miniruby(0x5608c718dea7) [0x5608c718dea7] /src/miniruby(0x5608c719417e) [0x5608c719417e] /src/miniruby(0x5608c71b793c) [0x5608c71b793c] /src/miniruby(0x5608c6f3d13c) [0x5608c6f3d13c] /src/miniruby(0x5608c6f42321) [0x5608c6f42321] /src/miniruby(0x5608c6e4f9b3) [0x5608c6e4f9b3] /usr/lib/libc.so.6(0x7f62122956c1) [0x7f62122956c1] /usr/lib/libc.so.6(__libc_start_main+0x89) [0x7f62122957f9] [0x5608c6e4f9f5] With a tiny change to fall back to symtab (even after parsing DWARF) we can get this (empty lines added for comparison with next block): -- C level backtrace information ------------------------------------------- /src/miniruby(rb_print_backtrace+0x1d) [0x55f6397aafdd] /src/vm_dump.c:1111 /src/miniruby(rb_vm_bugreport+0xa26) [0x55f6397b6f46] /src/vm_dump.c:1473 /src/miniruby(rb_bug_for_fatal_signal+0x110) [0x55f639521370] /src/error.c:1140 /src/miniruby(sigsegv+0x50) [0x55f6396d3150] /src/signal.c:948 /usr/lib/libc.so.6(0x7f991555d2d0) [0x7f991555d2d0] /usr/lib/libc.so.6(kill+0xb) [0x7f991555d4db] /src/miniruby(rb_f_kill+0x205) [0x55f6396d1a65] /src/signal.c:487 /src/miniruby(vm_call_cfunc_with_frame_+0xfe) [0x55f639779d1e] /src/vm_insnhelper.c:3821 /src/miniruby(vm_sendish.constprop.0+0xb7) [0x55f63977dea7] /src/vm_insnhelper.c:6056 /src/miniruby(vm_exec_core.lto_priv.0+0x6e) [0x55f63978417e] /src/insns.def:909 /src/miniruby(rb_vm_exec+0xec) [0x55f6397a793c] /src/vm.c:2825 /src/miniruby(rb_ec_exec_node+0xac) [0x55f63952d13c] /src/eval.c:284 /src/miniruby(ruby_run_node+0x61) [0x55f639532321] /src/eval.c:322 /src/miniruby(main+0x63) [0x55f63943f9b3] ./main.c:42 PR: https://github.com/ruby/ruby/pull/17743 Currently the code in addr2line.c has a stub: case DW_FORM_ref_addr: goto finish; /* not supported yet */ If we add support for that we can get better names and inlined frames (empty lines added for comparison with previous block): -- C level backtrace information ------------------------------------------- /src/miniruby(rb_print_backtrace+0x1d) [0x55cd045f81dd] /src/vm_dump.c:1111 /src/miniruby(fprintf+0x0) [0x55cd04604146] /src/vm_dump.c:1473 /src/miniruby(rb_vm_bugreport) /src/vm_dump.c:1476 /src/miniruby(rb_bug_for_fatal_signal+0x110) [0x55cd0436e370] /src/error.c:1140 /src/miniruby(sigsegv+0x50) [0x55cd04520150] /src/signal.c:948 /usr/lib/libc.so.6(0x7f9ef85522d0) [0x7f9ef85522d0] /usr/lib/libc.so.6(kill+0xb) [0x7f9ef85524db] /src/miniruby(rb_f_kill+0x205) [0x55cd0451ea65] /src/signal.c:487 /src/miniruby(vm_call_cfunc_with_frame_+0xfe) [0x55cd045c6f1e] /src/vm_insnhelper.c:3821 /src/miniruby(vm_sendish+0xb7) [0x55cd045cb0a7] /src/vm_insnhelper.c:6056 /src/miniruby(vm_exec_core+0x6e) [0x55cd045d137e] /src/insns.def:909 /src/miniruby(vm_exec_loop+0x16) [0x55cd045f4b3c] /src/vm.c:2825 /src/miniruby(rb_vm_exec) /src/vm.c:2801 /src/miniruby(rb_ec_exec_node+0xac) [0x55cd0437a13c] /src/eval.c:284 /src/miniruby(ruby_run_node+0x61) [0x55cd0437f321] /src/eval.c:322 /src/miniruby(rb_main+0x22) [0x55cd0428c9b3] ./main.c:42 /src/miniruby(main) ./main.c:62 /usr/lib/libc.so.6(0x7f9ef853b6c1) [0x7f9ef853b6c1] /usr/lib/libc.so.6(__libc_start_main+0x89) [0x7f9ef853b7f9] /src/miniruby(_start+0x25) [0x55cd0428c9f5] ./main.c:63 PR: https://github.com/ruby/ruby/pull/17744 -- https://bugs.ruby-lang.org/
Issue #22188 has been updated by rwstauner (Randy Stauner). backport for 4.0: https://github.com/ruby/ruby/pull/18011 ---------------------------------------- Bug #22188: addr2line doesn't find symbols when compiled with GCC LTO https://bugs.ruby-lang.org/issues/22188#change-118155 * Author: rwstauner (Randy Stauner) * Status: Closed * Assignee: luke-gru (Luke Gruber) * Backport: 3.3: UNKNOWN, 3.4: UNKNOWN, 4.0: REQUIRED ---------------------------------------- When compiling with LTO (the XCFLAGS and XLDFLAGS below) RUBY_CRASH_REPORT does not resolve symbols. ( export optflags="-O3" cflags="-fno-omit-frame-pointer" export XCFLAGS="-flto=auto -ffat-lto-objects -Werror=lto-type-mismatch" export XLDFLAGS="-flto=auto -ffat-lto-objects" ./configure --disable-install-doc --disable-shared make -j miniruby ) Simple crash simulation: ./miniruby -e 'Process.kill("SEGV", $$)' On master the output includes: -- C level backtrace information ------------------------------------------- /src/miniruby(0x5608c71bafdd) [0x5608c71bafdd] /src/miniruby(0x5608c71c6f46) [0x5608c71c6f46] /src/miniruby(0x5608c6f31370) [0x5608c6f31370] /src/miniruby(0x5608c70e3150) [0x5608c70e3150] /usr/lib/libc.so.6(0x7f62122ac2d0) [0x7f62122ac2d0] /usr/lib/libc.so.6(kill+0xb) [0x7f62122ac4db] /src/miniruby(0x5608c70e1a65) [0x5608c70e1a65] /src/miniruby(0x5608c7189d1e) [0x5608c7189d1e] /src/miniruby(0x5608c718dea7) [0x5608c718dea7] /src/miniruby(0x5608c719417e) [0x5608c719417e] /src/miniruby(0x5608c71b793c) [0x5608c71b793c] /src/miniruby(0x5608c6f3d13c) [0x5608c6f3d13c] /src/miniruby(0x5608c6f42321) [0x5608c6f42321] /src/miniruby(0x5608c6e4f9b3) [0x5608c6e4f9b3] /usr/lib/libc.so.6(0x7f62122956c1) [0x7f62122956c1] /usr/lib/libc.so.6(__libc_start_main+0x89) [0x7f62122957f9] [0x5608c6e4f9f5] With a tiny change to fall back to symtab (even after parsing DWARF) we can get this (empty lines added for comparison with next block): -- C level backtrace information ------------------------------------------- /src/miniruby(rb_print_backtrace+0x1d) [0x55f6397aafdd] /src/vm_dump.c:1111 /src/miniruby(rb_vm_bugreport+0xa26) [0x55f6397b6f46] /src/vm_dump.c:1473 /src/miniruby(rb_bug_for_fatal_signal+0x110) [0x55f639521370] /src/error.c:1140 /src/miniruby(sigsegv+0x50) [0x55f6396d3150] /src/signal.c:948 /usr/lib/libc.so.6(0x7f991555d2d0) [0x7f991555d2d0] /usr/lib/libc.so.6(kill+0xb) [0x7f991555d4db] /src/miniruby(rb_f_kill+0x205) [0x55f6396d1a65] /src/signal.c:487 /src/miniruby(vm_call_cfunc_with_frame_+0xfe) [0x55f639779d1e] /src/vm_insnhelper.c:3821 /src/miniruby(vm_sendish.constprop.0+0xb7) [0x55f63977dea7] /src/vm_insnhelper.c:6056 /src/miniruby(vm_exec_core.lto_priv.0+0x6e) [0x55f63978417e] /src/insns.def:909 /src/miniruby(rb_vm_exec+0xec) [0x55f6397a793c] /src/vm.c:2825 /src/miniruby(rb_ec_exec_node+0xac) [0x55f63952d13c] /src/eval.c:284 /src/miniruby(ruby_run_node+0x61) [0x55f639532321] /src/eval.c:322 /src/miniruby(main+0x63) [0x55f63943f9b3] ./main.c:42 PR: https://github.com/ruby/ruby/pull/17743 Currently the code in addr2line.c has a stub: case DW_FORM_ref_addr: goto finish; /* not supported yet */ If we add support for that we can get better names and inlined frames (empty lines added for comparison with previous block): -- C level backtrace information ------------------------------------------- /src/miniruby(rb_print_backtrace+0x1d) [0x55cd045f81dd] /src/vm_dump.c:1111 /src/miniruby(fprintf+0x0) [0x55cd04604146] /src/vm_dump.c:1473 /src/miniruby(rb_vm_bugreport) /src/vm_dump.c:1476 /src/miniruby(rb_bug_for_fatal_signal+0x110) [0x55cd0436e370] /src/error.c:1140 /src/miniruby(sigsegv+0x50) [0x55cd04520150] /src/signal.c:948 /usr/lib/libc.so.6(0x7f9ef85522d0) [0x7f9ef85522d0] /usr/lib/libc.so.6(kill+0xb) [0x7f9ef85524db] /src/miniruby(rb_f_kill+0x205) [0x55cd0451ea65] /src/signal.c:487 /src/miniruby(vm_call_cfunc_with_frame_+0xfe) [0x55cd045c6f1e] /src/vm_insnhelper.c:3821 /src/miniruby(vm_sendish+0xb7) [0x55cd045cb0a7] /src/vm_insnhelper.c:6056 /src/miniruby(vm_exec_core+0x6e) [0x55cd045d137e] /src/insns.def:909 /src/miniruby(vm_exec_loop+0x16) [0x55cd045f4b3c] /src/vm.c:2825 /src/miniruby(rb_vm_exec) /src/vm.c:2801 /src/miniruby(rb_ec_exec_node+0xac) [0x55cd0437a13c] /src/eval.c:284 /src/miniruby(ruby_run_node+0x61) [0x55cd0437f321] /src/eval.c:322 /src/miniruby(rb_main+0x22) [0x55cd0428c9b3] ./main.c:42 /src/miniruby(main) ./main.c:62 /usr/lib/libc.so.6(0x7f9ef853b6c1) [0x7f9ef853b6c1] /usr/lib/libc.so.6(__libc_start_main+0x89) [0x7f9ef853b7f9] /src/miniruby(_start+0x25) [0x55cd0428c9f5] ./main.c:63 PR: https://github.com/ruby/ruby/pull/17744 -- https://bugs.ruby-lang.org/
Issue #22188 has been updated by alanwu (Alan Wu). Backport changed from 3.3: UNKNOWN, 3.4: UNKNOWN, 4.0: REQUIRED to 3.3: UNKNOWN, 3.4: UNKNOWN, 4.0: DONE Backport PR merged. ---------------------------------------- Bug #22188: addr2line doesn't find symbols when compiled with GCC LTO https://bugs.ruby-lang.org/issues/22188#change-118586 * Author: rwstauner (Randy Stauner) * Status: Closed * Assignee: luke-gru (Luke Gruber) * Backport: 3.3: UNKNOWN, 3.4: UNKNOWN, 4.0: DONE ---------------------------------------- When compiling with LTO (the XCFLAGS and XLDFLAGS below) RUBY_CRASH_REPORT does not resolve symbols. ( export optflags="-O3" cflags="-fno-omit-frame-pointer" export XCFLAGS="-flto=auto -ffat-lto-objects -Werror=lto-type-mismatch" export XLDFLAGS="-flto=auto -ffat-lto-objects" ./configure --disable-install-doc --disable-shared make -j miniruby ) Simple crash simulation: ./miniruby -e 'Process.kill("SEGV", $$)' On master the output includes: -- C level backtrace information ------------------------------------------- /src/miniruby(0x5608c71bafdd) [0x5608c71bafdd] /src/miniruby(0x5608c71c6f46) [0x5608c71c6f46] /src/miniruby(0x5608c6f31370) [0x5608c6f31370] /src/miniruby(0x5608c70e3150) [0x5608c70e3150] /usr/lib/libc.so.6(0x7f62122ac2d0) [0x7f62122ac2d0] /usr/lib/libc.so.6(kill+0xb) [0x7f62122ac4db] /src/miniruby(0x5608c70e1a65) [0x5608c70e1a65] /src/miniruby(0x5608c7189d1e) [0x5608c7189d1e] /src/miniruby(0x5608c718dea7) [0x5608c718dea7] /src/miniruby(0x5608c719417e) [0x5608c719417e] /src/miniruby(0x5608c71b793c) [0x5608c71b793c] /src/miniruby(0x5608c6f3d13c) [0x5608c6f3d13c] /src/miniruby(0x5608c6f42321) [0x5608c6f42321] /src/miniruby(0x5608c6e4f9b3) [0x5608c6e4f9b3] /usr/lib/libc.so.6(0x7f62122956c1) [0x7f62122956c1] /usr/lib/libc.so.6(__libc_start_main+0x89) [0x7f62122957f9] [0x5608c6e4f9f5] With a tiny change to fall back to symtab (even after parsing DWARF) we can get this (empty lines added for comparison with next block): -- C level backtrace information ------------------------------------------- /src/miniruby(rb_print_backtrace+0x1d) [0x55f6397aafdd] /src/vm_dump.c:1111 /src/miniruby(rb_vm_bugreport+0xa26) [0x55f6397b6f46] /src/vm_dump.c:1473 /src/miniruby(rb_bug_for_fatal_signal+0x110) [0x55f639521370] /src/error.c:1140 /src/miniruby(sigsegv+0x50) [0x55f6396d3150] /src/signal.c:948 /usr/lib/libc.so.6(0x7f991555d2d0) [0x7f991555d2d0] /usr/lib/libc.so.6(kill+0xb) [0x7f991555d4db] /src/miniruby(rb_f_kill+0x205) [0x55f6396d1a65] /src/signal.c:487 /src/miniruby(vm_call_cfunc_with_frame_+0xfe) [0x55f639779d1e] /src/vm_insnhelper.c:3821 /src/miniruby(vm_sendish.constprop.0+0xb7) [0x55f63977dea7] /src/vm_insnhelper.c:6056 /src/miniruby(vm_exec_core.lto_priv.0+0x6e) [0x55f63978417e] /src/insns.def:909 /src/miniruby(rb_vm_exec+0xec) [0x55f6397a793c] /src/vm.c:2825 /src/miniruby(rb_ec_exec_node+0xac) [0x55f63952d13c] /src/eval.c:284 /src/miniruby(ruby_run_node+0x61) [0x55f639532321] /src/eval.c:322 /src/miniruby(main+0x63) [0x55f63943f9b3] ./main.c:42 PR: https://github.com/ruby/ruby/pull/17743 Currently the code in addr2line.c has a stub: case DW_FORM_ref_addr: goto finish; /* not supported yet */ If we add support for that we can get better names and inlined frames (empty lines added for comparison with previous block): -- C level backtrace information ------------------------------------------- /src/miniruby(rb_print_backtrace+0x1d) [0x55cd045f81dd] /src/vm_dump.c:1111 /src/miniruby(fprintf+0x0) [0x55cd04604146] /src/vm_dump.c:1473 /src/miniruby(rb_vm_bugreport) /src/vm_dump.c:1476 /src/miniruby(rb_bug_for_fatal_signal+0x110) [0x55cd0436e370] /src/error.c:1140 /src/miniruby(sigsegv+0x50) [0x55cd04520150] /src/signal.c:948 /usr/lib/libc.so.6(0x7f9ef85522d0) [0x7f9ef85522d0] /usr/lib/libc.so.6(kill+0xb) [0x7f9ef85524db] /src/miniruby(rb_f_kill+0x205) [0x55cd0451ea65] /src/signal.c:487 /src/miniruby(vm_call_cfunc_with_frame_+0xfe) [0x55cd045c6f1e] /src/vm_insnhelper.c:3821 /src/miniruby(vm_sendish+0xb7) [0x55cd045cb0a7] /src/vm_insnhelper.c:6056 /src/miniruby(vm_exec_core+0x6e) [0x55cd045d137e] /src/insns.def:909 /src/miniruby(vm_exec_loop+0x16) [0x55cd045f4b3c] /src/vm.c:2825 /src/miniruby(rb_vm_exec) /src/vm.c:2801 /src/miniruby(rb_ec_exec_node+0xac) [0x55cd0437a13c] /src/eval.c:284 /src/miniruby(ruby_run_node+0x61) [0x55cd0437f321] /src/eval.c:322 /src/miniruby(rb_main+0x22) [0x55cd0428c9b3] ./main.c:42 /src/miniruby(main) ./main.c:62 /usr/lib/libc.so.6(0x7f9ef853b6c1) [0x7f9ef853b6c1] /usr/lib/libc.so.6(__libc_start_main+0x89) [0x7f9ef853b7f9] /src/miniruby(_start+0x25) [0x55cd0428c9f5] ./main.c:63 PR: https://github.com/ruby/ruby/pull/17744 -- https://bugs.ruby-lang.org/
Issue #22188 has been updated by rwstauner (Randy Stauner). It might be worth noting for anyone that wants to try this, if you do LTO with fat LTO objects and a static build (as described at the top) this will make native extension compilation much slower. You can speed this up by stripping the LTO IR from the object that the gems will link against: objcopy --remove-section=".gnu.lto_*" "${INSTALL_DIR}/lib/libruby-static.a" ---------------------------------------- Bug #22188: addr2line doesn't find symbols when compiled with GCC LTO https://bugs.ruby-lang.org/issues/22188#change-119141 * Author: rwstauner (Randy Stauner) * Status: Closed * Assignee: luke-gru (Luke Gruber) * Backport: 3.3: UNKNOWN, 3.4: UNKNOWN, 4.0: DONE ---------------------------------------- When compiling with LTO (the XCFLAGS and XLDFLAGS below) RUBY_CRASH_REPORT does not resolve symbols. ( export optflags="-O3" cflags="-fno-omit-frame-pointer" export XCFLAGS="-flto=auto -ffat-lto-objects -Werror=lto-type-mismatch" export XLDFLAGS="-flto=auto -ffat-lto-objects" ./configure --disable-install-doc --disable-shared make -j miniruby ) Simple crash simulation: ./miniruby -e 'Process.kill("SEGV", $$)' On master the output includes: -- C level backtrace information ------------------------------------------- /src/miniruby(0x5608c71bafdd) [0x5608c71bafdd] /src/miniruby(0x5608c71c6f46) [0x5608c71c6f46] /src/miniruby(0x5608c6f31370) [0x5608c6f31370] /src/miniruby(0x5608c70e3150) [0x5608c70e3150] /usr/lib/libc.so.6(0x7f62122ac2d0) [0x7f62122ac2d0] /usr/lib/libc.so.6(kill+0xb) [0x7f62122ac4db] /src/miniruby(0x5608c70e1a65) [0x5608c70e1a65] /src/miniruby(0x5608c7189d1e) [0x5608c7189d1e] /src/miniruby(0x5608c718dea7) [0x5608c718dea7] /src/miniruby(0x5608c719417e) [0x5608c719417e] /src/miniruby(0x5608c71b793c) [0x5608c71b793c] /src/miniruby(0x5608c6f3d13c) [0x5608c6f3d13c] /src/miniruby(0x5608c6f42321) [0x5608c6f42321] /src/miniruby(0x5608c6e4f9b3) [0x5608c6e4f9b3] /usr/lib/libc.so.6(0x7f62122956c1) [0x7f62122956c1] /usr/lib/libc.so.6(__libc_start_main+0x89) [0x7f62122957f9] [0x5608c6e4f9f5] With a tiny change to fall back to symtab (even after parsing DWARF) we can get this (empty lines added for comparison with next block): -- C level backtrace information ------------------------------------------- /src/miniruby(rb_print_backtrace+0x1d) [0x55f6397aafdd] /src/vm_dump.c:1111 /src/miniruby(rb_vm_bugreport+0xa26) [0x55f6397b6f46] /src/vm_dump.c:1473 /src/miniruby(rb_bug_for_fatal_signal+0x110) [0x55f639521370] /src/error.c:1140 /src/miniruby(sigsegv+0x50) [0x55f6396d3150] /src/signal.c:948 /usr/lib/libc.so.6(0x7f991555d2d0) [0x7f991555d2d0] /usr/lib/libc.so.6(kill+0xb) [0x7f991555d4db] /src/miniruby(rb_f_kill+0x205) [0x55f6396d1a65] /src/signal.c:487 /src/miniruby(vm_call_cfunc_with_frame_+0xfe) [0x55f639779d1e] /src/vm_insnhelper.c:3821 /src/miniruby(vm_sendish.constprop.0+0xb7) [0x55f63977dea7] /src/vm_insnhelper.c:6056 /src/miniruby(vm_exec_core.lto_priv.0+0x6e) [0x55f63978417e] /src/insns.def:909 /src/miniruby(rb_vm_exec+0xec) [0x55f6397a793c] /src/vm.c:2825 /src/miniruby(rb_ec_exec_node+0xac) [0x55f63952d13c] /src/eval.c:284 /src/miniruby(ruby_run_node+0x61) [0x55f639532321] /src/eval.c:322 /src/miniruby(main+0x63) [0x55f63943f9b3] ./main.c:42 PR: https://github.com/ruby/ruby/pull/17743 Currently the code in addr2line.c has a stub: case DW_FORM_ref_addr: goto finish; /* not supported yet */ If we add support for that we can get better names and inlined frames (empty lines added for comparison with previous block): -- C level backtrace information ------------------------------------------- /src/miniruby(rb_print_backtrace+0x1d) [0x55cd045f81dd] /src/vm_dump.c:1111 /src/miniruby(fprintf+0x0) [0x55cd04604146] /src/vm_dump.c:1473 /src/miniruby(rb_vm_bugreport) /src/vm_dump.c:1476 /src/miniruby(rb_bug_for_fatal_signal+0x110) [0x55cd0436e370] /src/error.c:1140 /src/miniruby(sigsegv+0x50) [0x55cd04520150] /src/signal.c:948 /usr/lib/libc.so.6(0x7f9ef85522d0) [0x7f9ef85522d0] /usr/lib/libc.so.6(kill+0xb) [0x7f9ef85524db] /src/miniruby(rb_f_kill+0x205) [0x55cd0451ea65] /src/signal.c:487 /src/miniruby(vm_call_cfunc_with_frame_+0xfe) [0x55cd045c6f1e] /src/vm_insnhelper.c:3821 /src/miniruby(vm_sendish+0xb7) [0x55cd045cb0a7] /src/vm_insnhelper.c:6056 /src/miniruby(vm_exec_core+0x6e) [0x55cd045d137e] /src/insns.def:909 /src/miniruby(vm_exec_loop+0x16) [0x55cd045f4b3c] /src/vm.c:2825 /src/miniruby(rb_vm_exec) /src/vm.c:2801 /src/miniruby(rb_ec_exec_node+0xac) [0x55cd0437a13c] /src/eval.c:284 /src/miniruby(ruby_run_node+0x61) [0x55cd0437f321] /src/eval.c:322 /src/miniruby(rb_main+0x22) [0x55cd0428c9b3] ./main.c:42 /src/miniruby(main) ./main.c:62 /usr/lib/libc.so.6(0x7f9ef853b6c1) [0x7f9ef853b6c1] /usr/lib/libc.so.6(__libc_start_main+0x89) [0x7f9ef853b7f9] /src/miniruby(_start+0x25) [0x55cd0428c9f5] ./main.c:63 PR: https://github.com/ruby/ruby/pull/17744 -- https://bugs.ruby-lang.org/
participants (3)
-
alanwu (Alan Wu) -
luke-gru (Luke Gruber)
-
rwstauner (Randy Stauner)