Public bug reported: This bug is a regression introduced in 8.1.1-0ubuntu1 for Bionic -- the previous 8.1-0ubuntu3.2 gdb works fine with QEMU's gdbstub.
Reproduce: Get the sources for QEMU 5.2.0, and build the aarch64-linux-user target. (It looks like Bionic's QEMU is old enough that it doesn't provoke this gdb error.) Run qemu-aarch64 -g 1234 path/to/some/aarch64/binary In another terminal, start gdb-multiarch. At the (gdb) prompt, type "target remote :1234". GDB will dump core: (gdb) target remote :1234 Remote debugging using :1234 Recursive internal problem. Aborted (core dumped) You can see a variant of this also in the QEMU test suite with "make -C your-qemu-build-dir check-tcg", where the error message includes an assertion failure: [...] timeout 60 /home/petmay01/linaro/qemu-from-laptop/qemu/tests/guest-debug/run-test.py --gdb /usr/bin/gdb-multiarch --qemu /home/petmay01/linaro/qemu-from-laptop/qemu/build/aarch64-linux/qemu-aarch64 --qargs "" --bin sha1 --test /home/petmay01/linaro/qemu-from-laptop/qemu/tests/tcg/multiarch/gdbstub/sha1.py > run-gdbstub-sha1.out /build/gdb-veKdC1/gdb-8.1.1/gdb/regcache.c:122: internal-error: void* init_regcache_descr(gdbarch*): Assertion `MAX_REGISTER_SIZE >= descr->sizeof_register[i]' failed. A problem internal to GDB has been detected, further debugging may prove unreliable. This is a bug, please report it. For instructions, see: <http://www.gnu.org/software/gdb/bugs/>. Aborted (core dumped) /home/petmay01/linaro/qemu-from-laptop/qemu/tests/tcg/multiarch/Makefile.target:51: recipe for target 'run-gdbstub-sha1' failed ** Affects: gdb (Ubuntu) Importance: Undecided Status: New ** Affects: gdb (Ubuntu Bionic) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to gdb in Ubuntu. https://bugs.launchpad.net/bugs/1908063 Title: gdb-multiarch 8.1.1-0ubuntu1 regression: assertion failure or internal error when connecting to QEMU aarch64 gdbstub Status in gdb package in Ubuntu: New Status in gdb source package in Bionic: New Bug description: This bug is a regression introduced in 8.1.1-0ubuntu1 for Bionic -- the previous 8.1-0ubuntu3.2 gdb works fine with QEMU's gdbstub. Reproduce: Get the sources for QEMU 5.2.0, and build the aarch64-linux-user target. (It looks like Bionic's QEMU is old enough that it doesn't provoke this gdb error.) Run qemu-aarch64 -g 1234 path/to/some/aarch64/binary In another terminal, start gdb-multiarch. At the (gdb) prompt, type "target remote :1234". GDB will dump core: (gdb) target remote :1234 Remote debugging using :1234 Recursive internal problem. Aborted (core dumped) You can see a variant of this also in the QEMU test suite with "make -C your-qemu-build-dir check-tcg", where the error message includes an assertion failure: [...] timeout 60 /home/petmay01/linaro/qemu-from-laptop/qemu/tests/guest-debug/run-test.py --gdb /usr/bin/gdb-multiarch --qemu /home/petmay01/linaro/qemu-from-laptop/qemu/build/aarch64-linux/qemu-aarch64 --qargs "" --bin sha1 --test /home/petmay01/linaro/qemu-from-laptop/qemu/tests/tcg/multiarch/gdbstub/sha1.py > run-gdbstub-sha1.out /build/gdb-veKdC1/gdb-8.1.1/gdb/regcache.c:122: internal-error: void* init_regcache_descr(gdbarch*): Assertion `MAX_REGISTER_SIZE >= descr->sizeof_register[i]' failed. A problem internal to GDB has been detected, further debugging may prove unreliable. This is a bug, please report it. For instructions, see: <http://www.gnu.org/software/gdb/bugs/>. Aborted (core dumped) /home/petmay01/linaro/qemu-from-laptop/qemu/tests/tcg/multiarch/Makefile.target:51: recipe for target 'run-gdbstub-sha1' failed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdb/+bug/1908063/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
