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Merged
merged 5 commits into from
Dec 22, 2022
Merged

Support clang's DWARF #6993

merged 5 commits into from
Dec 22, 2022

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mame
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@mame mame commented Dec 22, 2022

$ ./miniruby -e 'Process.kill(:SEGV, $$)'
-e:1: [BUG] Segmentation fault at 0x000003e80000fa2d
ruby 3.2.0dev (2022-12-22T11:37:40Z support-clang-dwarf d1d61cabbc) [x86_64-linux]

...

-- C level backtrace information -------------------------------------------
/home/mame/work/ruby-build-clang-15/miniruby(rb_print_backtrace+0x14) [0x562b9062c4f5] /home/mame/work/ruby-build-clang-15/../ruby/vm_dump.c:770
/home/mame/work/ruby-build-clang-15/miniruby(rb_vm_bugreport) /home/mame/work/ruby-build-clang-15/../ruby/vm_dump.c:1065
/home/mame/work/ruby-build-clang-15/miniruby(bug_report_end+0x0) [0x562b9045ee0d] /home/mame/work/ruby-build-clang-15/../ruby/error.c:813
/home/mame/work/ruby-build-clang-15/miniruby(rb_bug_for_fatal_signal) /home/mame/work/ruby-build-clang-15/../ruby/error.c:813
/home/mame/work/ruby-build-clang-15/miniruby(sigsegv+0x51) [0x562b9058d521] /home/mame/work/ruby-build-clang-15/../ruby/signal.c:964
/lib/x86_64-linux-gnu/libc.so.6(0x7fd9f8e3bcf0) [0x7fd9f8e3bcf0]
/lib/x86_64-linux-gnu/libc.so.6(__GI_kill+0xb) [0x7fd9f8e3bf2b] ../sysdeps/unix/syscall-template.S:120
/lib/x86_64-linux-gnu/libc.so.6(kill) (null):0
/lib/x86_64-linux-gnu/libc.so.6(__GI___kill) (null):0
/lib/x86_64-linux-gnu/libc.so.6(__kill) (null):0
/lib/x86_64-linux-gnu/libc.so.6(kill) (null):0
/home/mame/work/ruby-build-clang-15/miniruby(rb_f_kill+0x1cb) [0x562b9058b7fb] /home/mame/work/ruby-build-clang-15/../ruby/signal.c:481
/home/mame/work/ruby-build-clang-15/miniruby(vm_call_cfunc_with_frame+0x11e) [0x562b90620d9e] ../ruby/vm_insnhelper.c:3252
/home/mame/work/ruby-build-clang-15/miniruby(vm_call_cfunc+0x2e) [0x562b9061b177] ../ruby/vm_insnhelper.c:3273
/home/mame/work/ruby-build-clang-15/miniruby(vm_call_method_each_type) ../ruby/vm_insnhelper.c:3904
./miniruby(vm_call_method+0x16b) [0x562b9061aebb]
/home/mame/work/ruby-build-clang-15/miniruby(vm_sendish+0x510) [0x562b90623410] ../ruby/vm_insnhelper.c:5064
/home/mame/work/ruby-build-clang-15/miniruby(vm_exec_core+0x2923) [0x562b90604453] ../ruby/insns.def:820
./miniruby(rb_vm_exec+0x938) [0x562b90616ee8]
/home/mame/work/ruby-build-clang-15/miniruby(rb_ec_exec_node+0x139) [0x562b9046b1a9] /home/mame/work/ruby-build-clang-15/../ruby/eval.c:289
/home/mame/work/ruby-build-clang-15/miniruby(ruby_run_node+0x5b) [0x562b9046b01b] /home/mame/work/ruby-build-clang-15/../ruby/eval.c:330
/home/mame/work/ruby-build-clang-15/miniruby(rb_main+0x1c) [0x562b903c5be5] /home/mame/work/ruby-build-clang-15/../ruby/main.c:38
/home/mame/work/ruby-build-clang-15/miniruby(main) /home/mame/work/ruby-build-clang-15/../ruby/main.c:57
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_call_main+0x80) [0x7fd9f8e23510] ../sysdeps/nptl/libc_start_call_main.h:58
/lib/x86_64-linux-gnu/libc.so.6(call_init+0x0) [0x7fd9f8e235c9] ../csu/libc-start.c:381
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main_impl) ../csu/libc-start.c:368
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main) (null):0
[0x562b903c5aa5]

mame added 5 commits December 22, 2022 23:05
... and add VAL_addr value type
... and add code to parse the sections of .debug_addr_base and
.debug_rnglists_base.
@mame mame force-pushed the support-clang-dwarf branch from 4aba44a to f4ceac7 Compare December 22, 2022 14:05
@mame mame merged commit 95a1d1f into ruby:master Dec 22, 2022
@mame mame deleted the support-clang-dwarf branch December 22, 2022 15:32
@mame
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mame commented Dec 22, 2022

Note: Unfortunately, it does not work well on M1 mac. I suspect that the problem is not in addr2line.c, but in the address list generation by libunwind.

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