[Bug libstdc++/70560] Review configure checks for _GLIBCXX_ATOMIC_BUILTINS and atomicity_dir
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70560 James Hilliard changed: What|Removed |Added CC||james.hilliard1 at gmail dot com --- Comment #2 from James Hilliard --- We've been hitting a bug in buildroot with an application(apcupsd) that links against libsupc++.a directly. This issue appears to be due to a sparc/arc specific missing symbols bug in libsupc++, we aren't seeing this build error for any other architectures at the moment. See discussions: http://lists.busybox.net/pipermail/buildroot/2020-May/282779.html http://lists.busybox.net/pipermail/buildroot/2020-August/289413.html Build error http://autobuild.buildroot.org/results/3be/3bedf404de0ea42ee3ba624cded65d310a847af9//build-end.log: /tmp/instance-0/output-1/host/opt/ext-toolchain/bin/../lib/gcc/sparc-buildroot-linux-uclibc/8.3.0/../../../../sparc-buildroot-linux-uclibc/bin/ld: /tmp/instance-0/output-1/host/opt/ext-toolchain/bin/../lib/gcc/sparc-buildroot-linux-uclibc/8.3.0/../../../../sparc-buildroot-linux-uclibc/lib/libsupc++.a(eh_throw.o): in function `__gxx_exception_cleanup(_Unwind_Reason_Code, _Unwind_Exception*)': eh_throw.cc:(.text._ZL23__gxx_exception_cleanup19_Unwind_Reason_CodeP17_Unwind_Exception+0x38): undefined reference to `__gnu_cxx::__exchange_and_add(int volatile*, int)' collect2: error: ld returned 1 exit status make[2]: *** [Makefile:33: apcupsd] Error 1
[Bug libstdc++/70560] Review configure checks for _GLIBCXX_ATOMIC_BUILTINS and atomicity_dir
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70560 --- Comment #5 from James Hilliard --- (In reply to Jonathan Wakely from comment #4) > (In reply to James Hilliard from comment #2) > > We've been hitting a bug in buildroot with an application(apcupsd) that > > links against libsupc++.a directly. > > Maybe I missed it, but I don't see the linker command in the build log. That might be somewhere here: http://autobuild.buildroot.org/results/3be/3bedf404de0ea42ee3ba624cded65d310a847af9/apcupsd-3.14.14/config.log > Could you show the command that's failing? Could you check if the symbol > _ZN9__gnu_cxx18__exchange_and_addEPVii is actually defined in libsupc++.a or > if something else like _ZN9__gnu_cxx18__exchange_and_addEPVll is defined > instead? The toolchain in that failed build is available here: http://autobuild.buildroot.org/toolchains/tarballs/br-sparc-uclibc-2020.02.tar.bz2 It appears reference to _ZN9__gnu_cxx18__exchange_and_addEPVii are in the following objects in libsupc++.a. $ nm eh_throw.o U __cxa_begin_catch U __cxa_free_exception U __cxa_get_globals T __cxa_init_primary_exception T __cxa_rethrow T __cxa_throw U _GLOBAL_OFFSET_TABLE_ w __pthread_key_create W __sparc_get_pc_thunk.l7 U _Unwind_RaiseException U _Unwind_Resume_or_Rethrow t _ZL23__gxx_exception_cleanup19_Unwind_Reason_CodeP17_Unwind_Exception U _ZN10__cxxabiv111__terminateEPFvvE U _ZN9__gnu_cxx18__exchange_and_addEPVii U _ZSt13get_terminatev U _ZSt14get_unexpectedv U _ZSt9terminatev $ nm eh_tm.o U __cxa_call_unexpected U __cxa_free_dependent_exception U __cxa_free_exception U __cxa_get_globals_fast T __cxa_tm_cleanup V DW.ref.__gxx_personality_v0 U _GLOBAL_OFFSET_TABLE_ U __gxx_personality_v0 w __pthread_key_create W __sparc_get_pc_thunk.l7 U _Unwind_DeleteException U _Unwind_Resume t _ZL22free_any_cxa_exceptionP17_Unwind_Exception U _ZN9__gnu_cxx18__exchange_and_addEPVii $ nm eh_ptr.o U __cxa_allocate_dependent_exception U __cxa_begin_catch U __cxa_free_dependent_exception U __cxa_free_exception U __cxa_get_globals V DW.ref.__gxx_personality_v0 U _GLOBAL_OFFSET_TABLE_ U __gxx_personality_v0 w __pthread_key_create W __sparc_get_pc_thunk.l7 U _Unwind_RaiseException t _ZL33__gxx_dependent_exception_cleanup19_Unwind_Reason_CodeP17_Unwind_Exception U _ZN10__cxxabiv111__terminateEPFvvE U _ZN9__gnu_cxx12__atomic_addEPVii U _ZN9__gnu_cxx18__exchange_and_addEPVii T _ZNKSt15__exception_ptr13exception_ptr20__cxa_exception_typeEv T _ZNKSt15__exception_ptr13exception_ptr6_M_getEv T _ZNKSt15__exception_ptr13exception_ptrcvMS0_FvvEEv T _ZNKSt15__exception_ptr13exception_ptrntEv T _ZNSt15__exception_ptr13exception_ptr10_M_releaseEv T _ZNSt15__exception_ptr13exception_ptr18_M_safe_bool_dummyEv T _ZNSt15__exception_ptr13exception_ptr4swapERS0_ T _ZNSt15__exception_ptr13exception_ptr9_M_addrefEv T _ZNSt15__exception_ptr13exception_ptraSERKS0_ T _ZNSt15__exception_ptr13exception_ptrC1EMS0_FvvE T _ZNSt15__exception_ptr13exception_ptrC1EPv T _ZNSt15__exception_ptr13exception_ptrC1ERKS0_ T _ZNSt15__exception_ptr13exception_ptrC1Ev T _ZNSt15__exception_ptr13exception_ptrC2EMS0_FvvE T _ZNSt15__exception_ptr13exception_ptrC2EPv T _ZNSt15__exception_ptr13exception_ptrC2ERKS0_ T _ZNSt15__exception_ptr13exception_ptrC2Ev T _ZNSt15__exception_ptr13exception_ptrD1Ev T _ZNSt15__exception_ptr13exception_ptrD2Ev T _ZNSt15__exception_ptreqERKNS_13exception_ptrES2_ T _ZNSt15__exception_ptrneERKNS_13exception_ptrES2_ U _ZSt13get_terminatev U _ZSt14get_unexpectedv T _ZSt17current_exceptionv T _ZSt17rethrow_exceptionNSt15__exception_ptr13exception_ptrE U _ZSt9terminatev
[Bug libstdc++/96657] New: libsupc++.a missing required functions from src/c++98/atomicity.cc when atomic builtins are not supported
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96657 Bug ID: 96657 Summary: libsupc++.a missing required functions from src/c++98/atomicity.cc when atomic builtins are not supported Product: gcc Version: 9.3.1 Status: UNCONFIRMED Severity: normal Priority: P3 Component: libstdc++ Assignee: unassigned at gcc dot gnu.org Reporter: james.hilliard1 at gmail dot com CC: redi at gcc dot gnu.org Target Milestone: --- We've been hitting a bug in buildroot with an application(apcupsd) that links against libsupc++.a directly. This issue appears to be due to a sparc/arc specific missing symbols bug in libsupc++, we aren't seeing this build error for any other architectures at the moment. See discussions: http://lists.busybox.net/pipermail/buildroot/2020-May/282779.html http://lists.busybox.net/pipermail/buildroot/2020-August/289413.html Build error http://autobuild.buildroot.org/results/3be/3bedf404de0ea42ee3ba624cded65d310a847af9//build-end.log: /tmp/instance-0/output-1/host/opt/ext-toolchain/bin/../lib/gcc/sparc-buildroot-linux-uclibc/8.3.0/../../../../sparc-buildroot-linux-uclibc/bin/ld: /tmp/instance-0/output-1/host/opt/ext-toolchain/bin/../lib/gcc/sparc-buildroot-linux-uclibc/8.3.0/../../../../sparc-buildroot-linux-uclibc/lib/libsupc++.a(eh_throw.o): in function `__gxx_exception_cleanup(_Unwind_Reason_Code, _Unwind_Exception*)': eh_throw.cc:(.text._ZL23__gxx_exception_cleanup19_Unwind_Reason_CodeP17_Unwind_Exception+0x38): undefined reference to `__gnu_cxx::__exchange_and_add(int volatile*, int)' collect2: error: ld returned 1 exit status make[2]: *** [Makefile:33: apcupsd] Error 1 Based on previous discussions(https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70560#c6) it appears this has been broken since r244051 enabled std::exception_ptr for targets without lock-free atomic built-ins.
[Bug libstdc++/70560] Review configure checks for _GLIBCXX_ATOMIC_BUILTINS and atomicity_dir
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70560
--- Comment #7 from James Hilliard ---
(In reply to Jonathan Wakely from comment #6)
> (In reply to James Hilliard from comment #5)
> > That might be somewhere here:
> > http://autobuild.buildroot.org/results/3be/
> > 3bedf404de0ea42ee3ba624cded65d310a847af9/apcupsd-3.14.14/config.log
>
> No, I meant the command that fails when running 'make'. But it doesn't
> matter now, because ...
>
> > It appears reference to _ZN9__gnu_cxx18__exchange_and_addEPVii are in the
> > following objects in libsupc++.a.
>
> I was looking for the definition of the function not the references to it,
> but I think the problem is that those functions are defined by
> src/c++98/atomicity.cc which isn't included in libsupc++.a at all.
>
> Using the atomic functions in libsupc++.a assumes that atomic builtins are
> supported and so we won't need the extern functions from atomicity.cc, which
> isn't necessarily true.
>
> I think this has been broken since r244051 enabled std::exception_ptr for
> targets without lock-free atomic built-ins. Previously if we didn't have
> atomic built-ins, libsupc++ just wouldn't try to use atomics. Now it uses
> the built-ins or falls back to the extern functions in atomicity.cc, but the
> latter are not in libsupc++.a so it only works if you link to the full
> libstdc++.{a,so} library.
>
> Please file a new bug, yours is a separate issue to this one.
New bug report opened here: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96657
[Bug libstdc++/96657] [9/10/11 Regression] libsupc++.a missing required functions from src/c++98/atomicity.cc when atomic builtins are not supported
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96657 --- Comment #2 from James Hilliard --- (In reply to Jonathan Wakely from comment #1) > I think r244051 caused libsupc++.a to depend on libstdc++.so for targets > that don't support lock-free atomics for int. Yeah, the current workaround we came up with was to force linking to libstdc++.so, but that's probably not a real fix for the root cause of the issue. I'm assuming the real fix would be to change libsupc++.a so that it includes the missing symbols?
[Bug debug/106263] BTF_KIND_FUNC type does not encode linkage
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106263 --- Comment #2 from James Hilliard --- Should this be backported to the gcc 12 branch?
[Bug c/106745] New: segfault in bpf_core_get_sou_member_index
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106745 Bug ID: 106745 Summary: segfault in bpf_core_get_sou_member_index Product: gcc Version: 13.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: james.hilliard1 at gmail dot com Target Milestone: --- Created attachment 53510 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=53510&action=edit bug report output Running into this on master with the following patch(seems unrelated to the crash): https://patchwork.ozlabs.org/project/gcc/patch/87a681d7tf.fsf...@oracle.com/
[Bug c/106773] New: libbpf: failed to find BTF info for global/extern symbol 'bpf_link_fops'
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106773 Bug ID: 106773 Summary: libbpf: failed to find BTF info for global/extern symbol 'bpf_link_fops' Product: gcc Version: 13.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: james.hilliard1 at gmail dot com Target Milestone: --- GCC BTF Generation appears to not be working correctly for bpf_link_fops in the bpf test test_ksyms.c See: https://github.com/torvalds/linux/blob/v6.0-rc3/tools/testing/selftests/bpf/progs/test_ksyms.c GCC gen object failure: $ /home/buildroot/bpf-next-test/tools/testing/selftests/bpf/tools/sbin/bpftool --debug gen object /home/buildroot/bpf-next-test/tools/testing/selftests/bpf/bpf_gcc/test_ksyms.linked1.o /home/buildroot/bpf-next-test/tools/testing/selftests/bpf/bpf_gcc/test_ksyms.o libbpf: linker: adding object file '/home/buildroot/bpf-next-test/tools/testing/selftests/bpf/bpf_gcc/test_ksyms.o'... libbpf: failed to find BTF info for global/extern symbol 'bpf_link_fops' Error: failed to link '/home/buildroot/bpf-next-test/tools/testing/selftests/bpf/bpf_gcc/test_ksyms.o': Unknown error -2 (-2) GCC BTF dump: $ /home/buildroot/bpf-next-test/tools/testing/selftests/bpf/tools/sbin/bpftool --debug btf dump file /home/buildroot/bpf-next-test/tools/testing/selftests/bpf/bpf_gcc/test_ksyms.o format raw [1] INT 'signed char' size=1 bits_offset=0 nr_bits=8 encoding=SIGNED [2] INT 'unsigned char' size=1 bits_offset=0 nr_bits=8 encoding=(none) [3] TYPEDEF '__u8' type_id=2 [4] INT 'short int' size=2 bits_offset=0 nr_bits=16 encoding=SIGNED [5] INT 'short unsigned int' size=2 bits_offset=0 nr_bits=16 encoding=(none) [6] TYPEDEF '__u16' type_id=5 [7] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED [8] TYPEDEF '__s32' type_id=7 [9] INT 'unsigned int' size=4 bits_offset=0 nr_bits=32 encoding=(none) [10] TYPEDEF '__u32' type_id=9 [11] INT 'long long int' size=8 bits_offset=0 nr_bits=64 encoding=SIGNED [12] TYPEDEF '__s64' type_id=11 [13] INT 'long long unsigned int' size=8 bits_offset=0 nr_bits=64 encoding=(none) [14] TYPEDEF '__u64' type_id=13 [15] TYPEDEF '__be16' type_id=6 [16] TYPEDEF '__be32' type_id=10 [17] TYPEDEF '__wsum' type_id=10 [18] INT 'long unsigned int' size=8 bits_offset=0 nr_bits=64 encoding=(none) [19] INT 'char' size=1 bits_offset=0 nr_bits=8 encoding=SIGNED [20] CONST '(anon)' type_id=19 [21] UNION '(anon)' size=8 vlen=1 'flow_keys' type_id=27 bits_offset=0 [22] STRUCT 'bpf_flow_keys' size=56 vlen=13 'nhoff' type_id=6 bits_offset=0 'thoff' type_id=6 bits_offset=16 'addr_proto' type_id=6 bits_offset=32 'is_frag' type_id=3 bits_offset=48 'is_first_frag' type_id=3 bits_offset=56 'is_encap' type_id=3 bits_offset=64 'ip_proto' type_id=3 bits_offset=72 'n_proto' type_id=15 bits_offset=80 'sport' type_id=15 bits_offset=96 'dport' type_id=15 bits_offset=112 '(anon)' type_id=23 bits_offset=128 'flags' type_id=10 bits_offset=384 'flow_label' type_id=16 bits_offset=416 [23] UNION '(anon)' size=32 vlen=2 '(anon)' type_id=24 bits_offset=0 '(anon)' type_id=25 bits_offset=0 [24] STRUCT '(anon)' size=8 vlen=2 'ipv4_src' type_id=16 bits_offset=0 'ipv4_dst' type_id=16 bits_offset=32 [25] STRUCT '(anon)' size=32 vlen=2 'ipv6_src' type_id=26 bits_offset=0 'ipv6_dst' type_id=26 bits_offset=128 [26] ARRAY '(anon)' type_id=10 index_type_id=18 nr_elems=4 [27] PTR '(anon)' type_id=22 [28] UNION '(anon)' size=8 vlen=1 'sk' type_id=30 bits_offset=0 [29] STRUCT 'bpf_sock' size=80 vlen=14 'bound_dev_if' type_id=10 bits_offset=0 'family' type_id=10 bits_offset=32 'type' type_id=10 bits_offset=64 'protocol' type_id=10 bits_offset=96 'mark' type_id=10 bits_offset=128 'priority' type_id=10 bits_offset=160 'src_ip4' type_id=10 bits_offset=192 'src_ip6' type_id=26 bits_offset=224 'src_port' type_id=10 bits_offset=352 'dst_port' type_id=15 bits_offset=384 'dst_ip4' type_id=10 bits_offset=416 'dst_ip6' type_id=26 bits_offset=448 '
[Bug target/106773] libbpf: failed to find BTF info for global/extern symbol 'bpf_link_fops'
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106773 --- Comment #1 from James Hilliard --- Getting a different error when running with: https://patchwork.ozlabs.org/project/gcc/patch/20220901195340.10653-1-david.fa...@oracle.com/ GCC gen object failure: $ /home/buildroot/bpf-next-test/tools/testing/selftests/bpf/tools/sbin/bpftool --debug gen object /home/buildroot/bpf-next-test/tools/testing/selftests/bpf/bpf_gcc/test_ksyms.linked1.o /home/buildroot/bpf-next-test/tools/testing/selftests/bpf/bpf_gcc/test_ksyms.o libbpf: linker: adding object file '/home/buildroot/bpf-next-test/tools/testing/selftests/bpf/bpf_gcc/test_ksyms.o'... libbpf: failed to find symbol for variable 'bpf_link_fops1' in section '.ksyms' Error: failed to link '/home/buildroot/bpf-next-test/tools/testing/selftests/bpf/bpf_gcc/test_ksyms.o': Unknown error -2 (-2) GCC BTF dump: $ /home/buildroot/bpf-next-test/tools/testing/selftests/bpf/tools/sbin/bpftool --debug btf dump file /home/buildroot/bpf-next-test/tools/testing/selftests/bpf/bpf_gcc/test_ksyms.o format raw [1] INT 'signed char' size=1 bits_offset=0 nr_bits=8 encoding=SIGNED [2] INT 'unsigned char' size=1 bits_offset=0 nr_bits=8 encoding=(none) [3] TYPEDEF '__u8' type_id=2 [4] INT 'short int' size=2 bits_offset=0 nr_bits=16 encoding=SIGNED [5] INT 'short unsigned int' size=2 bits_offset=0 nr_bits=16 encoding=(none) [6] TYPEDEF '__u16' type_id=5 [7] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED [8] TYPEDEF '__s32' type_id=7 [9] INT 'unsigned int' size=4 bits_offset=0 nr_bits=32 encoding=(none) [10] TYPEDEF '__u32' type_id=9 [11] INT 'long long int' size=8 bits_offset=0 nr_bits=64 encoding=SIGNED [12] TYPEDEF '__s64' type_id=11 [13] INT 'long long unsigned int' size=8 bits_offset=0 nr_bits=64 encoding=(none) [14] TYPEDEF '__u64' type_id=13 [15] TYPEDEF '__be16' type_id=6 [16] TYPEDEF '__be32' type_id=10 [17] TYPEDEF '__wsum' type_id=10 [18] INT 'long unsigned int' size=8 bits_offset=0 nr_bits=64 encoding=(none) [19] INT 'char' size=1 bits_offset=0 nr_bits=8 encoding=SIGNED [20] CONST '(anon)' type_id=19 [21] UNION '(anon)' size=8 vlen=1 'flow_keys' type_id=27 bits_offset=0 [22] STRUCT 'bpf_flow_keys' size=56 vlen=13 'nhoff' type_id=6 bits_offset=0 'thoff' type_id=6 bits_offset=16 'addr_proto' type_id=6 bits_offset=32 'is_frag' type_id=3 bits_offset=48 'is_first_frag' type_id=3 bits_offset=56 'is_encap' type_id=3 bits_offset=64 'ip_proto' type_id=3 bits_offset=72 'n_proto' type_id=15 bits_offset=80 'sport' type_id=15 bits_offset=96 'dport' type_id=15 bits_offset=112 '(anon)' type_id=23 bits_offset=128 'flags' type_id=10 bits_offset=384 'flow_label' type_id=16 bits_offset=416 [23] UNION '(anon)' size=32 vlen=2 '(anon)' type_id=24 bits_offset=0 '(anon)' type_id=25 bits_offset=0 [24] STRUCT '(anon)' size=8 vlen=2 'ipv4_src' type_id=16 bits_offset=0 'ipv4_dst' type_id=16 bits_offset=32 [25] STRUCT '(anon)' size=32 vlen=2 'ipv6_src' type_id=26 bits_offset=0 'ipv6_dst' type_id=26 bits_offset=128 [26] ARRAY '(anon)' type_id=10 index_type_id=18 nr_elems=4 [27] PTR '(anon)' type_id=22 [28] UNION '(anon)' size=8 vlen=1 'sk' type_id=30 bits_offset=0 [29] STRUCT 'bpf_sock' size=80 vlen=14 'bound_dev_if' type_id=10 bits_offset=0 'family' type_id=10 bits_offset=32 'type' type_id=10 bits_offset=64 'protocol' type_id=10 bits_offset=96 'mark' type_id=10 bits_offset=128 'priority' type_id=10 bits_offset=160 'src_ip4' type_id=10 bits_offset=192 'src_ip6' type_id=26 bits_offset=224 'src_port' type_id=10 bits_offset=352 'dst_port' type_id=15 bits_offset=384 'dst_ip4' type_id=10 bits_offset=416 'dst_ip6' type_id=26 bits_offset=448 'state' type_id=10 bits_offset=576 'rx_queue_mapping' type_id=8 bits_offset=608 [30] PTR '(anon)' type_id=29 [31] STRUCT '__sk_buff' size=192 vlen=34 'len' type_id=10 bits_offset=0 'pkt_type' type_id=10 bits_offset=32 'mark' type_id=10 bits_offset=64 'queue_mapping' type_id=10 bits_offset=96 'protocol' type_id=10 bits_offset=128 'vlan_present' type_id=10 bits_offset=160 'vlan_tci' type_id=10 bits_offset=192 'vlan_proto' type_id=10 bits_offset=224 'priority' type_id=10 bits_offset=256 'ingress_ifindex' type_id=10 bits_offset=288 'ifindex' type_id=10 bits_offset=320 'tc_index' type_id=10 bits_offset=352 'cb' type_id=32 bits_offset=384 'hash' type_id=10 bits_offset=544 'tc_classid' type_id=10 bits_offset=576 'data' type_id=10 bits_offset=608 'data_end' type_id=10 bits_offset=640 'napi_id' type_id=10 bits_offset=672 'family' type_id=10 bits_offset=704 'remote_ip4' type_id=10 bits_offset=736 'local_ip4' type_id=10 bits_offset=768
[Bug target/106773] libbpf: failed to find BTF info for global/extern symbol 'bpf_link_fops'
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106773 --- Comment #2 from James Hilliard --- Testing with this patch: diff --git a/gcc/btfout.cc b/gcc/btfout.cc index 37ec662c190..ff08d0c5024 100644 --- a/gcc/btfout.cc +++ b/gcc/btfout.cc @@ -345,6 +345,8 @@ btf_collect_datasec (ctf_container_ref ctfc) tree size = DECL_SIZE_UNIT (node->decl); if (tree_fits_uhwi_p (size)) info.size = tree_to_uhwi (size); + else if (VOID_TYPE_P (TREE_TYPE (node->decl))) + info.size = 1; /* Offset is left as 0 at compile time, to be filled in by loaders such as libbpf. */ GCC gen object failure: $ /home/buildroot/bpf-next-test/tools/testing/selftests/bpf/tools/sbin/bpftool --debug gen object /home/buildroot/bpf-next-test/tools/testing/selftests/bpf/bpf_gcc/test_ksyms.linked1.o /home/buildroot/bpf-next-test/tools/testing/selftests/bpf/bpf_gcc/test_ksyms.o libbpf: linker: adding object file '/home/buildroot/bpf-next-test/tools/testing/selftests/bpf/bpf_gcc/test_ksyms.o'... libbpf: failed to find symbol for variable 'bpf_link_fops1' in section '.ksyms' Error: failed to link '/home/buildroot/bpf-next-test/tools/testing/selftests/bpf/bpf_gcc/test_ksyms.o': Unknown error -2 (-2) GCC BTF dump: $ /home/buildroot/bpf-next-test/tools/testing/selftests/bpf/tools/sbin/bpftool --debug btf dump file /home/buildroot/bpf-next-test/tools/testing/selftests/bpf/bpf_gcc/test_ksyms.o format raw [1] INT 'signed char' size=1 bits_offset=0 nr_bits=8 encoding=SIGNED [2] INT 'unsigned char' size=1 bits_offset=0 nr_bits=8 encoding=(none) [3] TYPEDEF '__u8' type_id=2 [4] INT 'short int' size=2 bits_offset=0 nr_bits=16 encoding=SIGNED [5] INT 'short unsigned int' size=2 bits_offset=0 nr_bits=16 encoding=(none) [6] TYPEDEF '__u16' type_id=5 [7] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED [8] TYPEDEF '__s32' type_id=7 [9] INT 'unsigned int' size=4 bits_offset=0 nr_bits=32 encoding=(none) [10] TYPEDEF '__u32' type_id=9 [11] INT 'long long int' size=8 bits_offset=0 nr_bits=64 encoding=SIGNED [12] TYPEDEF '__s64' type_id=11 [13] INT 'long long unsigned int' size=8 bits_offset=0 nr_bits=64 encoding=(none) [14] TYPEDEF '__u64' type_id=13 [15] TYPEDEF '__be16' type_id=6 [16] TYPEDEF '__be32' type_id=10 [17] TYPEDEF '__wsum' type_id=10 [18] INT 'long unsigned int' size=8 bits_offset=0 nr_bits=64 encoding=(none) [19] INT 'char' size=1 bits_offset=0 nr_bits=8 encoding=SIGNED [20] CONST '(anon)' type_id=19 [21] UNION '(anon)' size=8 vlen=1 'flow_keys' type_id=27 bits_offset=0 [22] STRUCT 'bpf_flow_keys' size=56 vlen=13 'nhoff' type_id=6 bits_offset=0 'thoff' type_id=6 bits_offset=16 'addr_proto' type_id=6 bits_offset=32 'is_frag' type_id=3 bits_offset=48 'is_first_frag' type_id=3 bits_offset=56 'is_encap' type_id=3 bits_offset=64 'ip_proto' type_id=3 bits_offset=72 'n_proto' type_id=15 bits_offset=80 'sport' type_id=15 bits_offset=96 'dport' type_id=15 bits_offset=112 '(anon)' type_id=23 bits_offset=128 'flags' type_id=10 bits_offset=384 'flow_label' type_id=16 bits_offset=416 [23] UNION '(anon)' size=32 vlen=2 '(anon)' type_id=24 bits_offset=0 '(anon)' type_id=25 bits_offset=0 [24] STRUCT '(anon)' size=8 vlen=2 'ipv4_src' type_id=16 bits_offset=0 'ipv4_dst' type_id=16 bits_offset=32 [25] STRUCT '(anon)' size=32 vlen=2 'ipv6_src' type_id=26 bits_offset=0 'ipv6_dst' type_id=26 bits_offset=128 [26] ARRAY '(anon)' type_id=10 index_type_id=18 nr_elems=4 [27] PTR '(anon)' type_id=22 [28] UNION '(anon)' size=8 vlen=1 'sk' type_id=30 bits_offset=0 [29] STRUCT 'bpf_sock' size=80 vlen=14 'bound_dev_if' type_id=10 bits_offset=0 'family' type_id=10 bits_offset=32 'type' type_id=10 bits_offset=64 'protocol' type_id=10 bits_offset=96 'mark' type_id=10 bits_offset=128 'priority' type_id=10 bits_offset=160 'src_ip4' type_id=10 bits_offset=192 'src_ip6' type_id=26 bits_offset=224 'src_port' type_id=10 bits_offset=352 'dst_port' type_id=15 bits_offset=384 'dst_ip4' type_id=10 bits_offset=416 'dst_ip6' type_id=26 bits_offset=448 'state' type_id=10 bits_offset=576 'rx_queue_mapping' type_id=8 bits_offset=608 [30] PTR '(anon)' type_id=29 [31] STRUCT '__sk_buff' size=192 vlen=34 'len' type_id=10 bits_offset=0 'pkt_type' type_id=10 bits_offset=32 'mark' type_id=10 bits_offset=64 'queue_mapping' type_id=10 bits_offset=96 'protocol' type_id=10 bits_offset=128 'vlan_present' type_id=10 bits_offset=160 'vlan_tci' type_id=10 bits_offset=192 'vlan_proto' type_id=10 bits_offset=224 'priority' type_id=10 bits_offset=256 'ingress_ifindex' type_id=10 bits_offset=288 'ifindex' type_id=10 bits_offset=320 'tc_index' type_id=10 bits_offset=352 'cb' type_id=32
[Bug target/107843] New: error: incompatible type for argument in ___bpf_ctx_cast2
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107843 Bug ID: 107843 Summary: error: incompatible type for argument in ___bpf_ctx_cast2 Product: gcc Version: 13.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: target Assignee: unassigned at gcc dot gnu.org Reporter: james.hilliard1 at gmail dot com Target Milestone: --- I'm seeing this error which does not occur in llvm for a bpf test(bpf_cubic.c) in bpf-next: In file included from /home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_tcp_helpers.h:9, from progs/bpf_cubic.c:20: progs/bpf_cubic.c: In function 'bpf_cubic_cwnd_event': /home/buildroot/bpf-next/tools/bpf/resolve_btfids/libbpf/include/bpf/bpf_tracing.h:399:63: error: incompatible type for argument 3 of 'bpf_cubic_cwnd_event' 399 | #define ___bpf_ctx_cast2(x, args...) ___bpf_ctx_cast1(args), (void *)ctx[1] | ^~ | | | void * /home/buildroot/bpf-next/tools/bpf/resolve_btfids/libbpf/include/bpf/bpf_helpers.h:187:29: note: in expansion of macro '___bpf_ctx_cast2' 187 | #define ___bpf_concat(a, b) a ## b | ^ /home/buildroot/bpf-next/tools/bpf/resolve_btfids/libbpf/include/bpf/bpf_helpers.h:190:29: note: in expansion of macro '___bpf_concat' 190 | #define ___bpf_apply(fn, n) ___bpf_concat(fn, n) | ^ /home/buildroot/bpf-next/tools/bpf/resolve_btfids/libbpf/include/bpf/bpf_tracing.h:410:39: note: in expansion of macro '___bpf_apply' 410 | #define ___bpf_ctx_cast(args...) ___bpf_apply(___bpf_ctx_cast, ___bpf_narg(args))(args) | ^~~~ /home/buildroot/bpf-next/tools/bpf/resolve_btfids/libbpf/include/bpf/bpf_tracing.h:435:27: note: in expansion of macro '___bpf_ctx_cast' 435 | return ##name(___bpf_ctx_cast(args)); \ | ^~~ progs/bpf_cubic.c:189:6: note: in expansion of macro 'BPF_PROG' 189 | void BPF_PROG(bpf_cubic_cwnd_event, struct sock *sk, enum tcp_ca_event event) | ^~~~ progs/bpf_cubic.c:189:72: note: expected 'enum tcp_ca_event' but argument is of type 'void *' 189 | void BPF_PROG(bpf_cubic_cwnd_event, struct sock *sk, enum tcp_ca_event event) | ~~^ /home/buildroot/bpf-next/tools/bpf/resolve_btfids/libbpf/include/bpf/bpf_tracing.h:430:39: note: in definition of macro 'BPF_PROG' 430 | ##name(unsigned long long *ctx, ##args); \ | ^~~~ /home/buildroot/bpf-next/tools/bpf/resolve_btfids/libbpf/include/bpf/bpf_tracing.h:435:16: error: 'return' with a value, in function returning void [-Werror] 435 | return ##name(___bpf_ctx_cast(args)); \ |^~~~ progs/bpf_cubic.c:189:6: note: in expansion of macro 'BPF_PROG' 189 | void BPF_PROG(bpf_cubic_cwnd_event, struct sock *sk, enum tcp_ca_event event) | ^~~~ progs/bpf_cubic.c:189:15: note: declared here 189 | void BPF_PROG(bpf_cubic_cwnd_event, struct sock *sk, enum tcp_ca_event event) | ^~~~ /home/buildroot/bpf-next/tools/bpf/resolve_btfids/libbpf/include/bpf/bpf_tracing.h:431:17: note: in definition of macro 'BPF_PROG' 431 | typeof(name(0)) name(unsigned long long *ctx) \ |
[Bug target/107844] New: error: argument is not a field access for __builtin_preserve_field_info
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107844 Bug ID: 107844 Summary: error: argument is not a field access for __builtin_preserve_field_info Product: gcc Version: 13.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: target Assignee: unassigned at gcc dot gnu.org Reporter: james.hilliard1 at gmail dot com Target Milestone: --- I'm seeing this error which does not occur in llvm for a bpf test(test_core_reloc_existence.c) in bpf-next: In file included from progs/test_core_reloc_existence.c:7: progs/test_core_reloc_existence.c: In function 'test_core_existence': /home/buildroot/bpf-next/tools/bpf/resolve_btfids/libbpf/include/bpf/bpf_core_read.h:132:9: error: argument is not a field access 132 | __builtin_preserve_field_info(___bpf_field_ref(field), BPF_FIELD_EXISTS) | ^ progs/test_core_reloc_existence.c:66:13: note: in expansion of macro 'bpf_core_field_exists' 66 | if (bpf_core_field_exists(struct core_reloc_existence, arr)) | ^
[Bug target/107846] New: error: result of '8000 << 8' requires 22 bits to represent, but 'short int' only has 16 bits
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107846 Bug ID: 107846 Summary: error: result of '8000 << 8' requires 22 bits to represent, but 'short int' only has 16 bits Product: gcc Version: 13.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: target Assignee: unassigned at gcc dot gnu.org Reporter: james.hilliard1 at gmail dot com Target Milestone: --- I'm seeing this error which does not occur in llvm for a bpf test(test_tc_tunnel.c) in bpf-next, I'm not sure if this is an upstream bug in the test itself or a bug in gcc: In function '__encap_ipv4': cc1: error: result of '8000 << 8' requires 22 bits to represent, but 'short int' only has 16 bits [-Werror=shift-overflow=] cc1: error: result of '2 << 8' requires 24 bits to represent, but 'short int' only has 16 bits [-Werror=shift-overflow=] progs/test_tc_tunnel.c:228:31: warning: taking address of packed member of 'struct v4hdr' may result in an unaligned pointer value [-Waddress-of-packed-member] 228 | set_ipv4_csum((void *)&h_outer.ip); | ^~~ In function '__encap_ipv6': cc1: error: result of '8000 << 8' requires 22 bits to represent, but 'short int' only has 16 bits [-Werror=shift-overflow=] cc1: error: result of '2 << 8' requires 24 bits to represent, but 'short int' only has 16 bits [-Werror=shift-overflow=]
[Bug target/107847] New: error: integer overflow in expression in bpf-next test_xdp_vlan.c
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107847 Bug ID: 107847 Summary: error: integer overflow in expression in bpf-next test_xdp_vlan.c Product: gcc Version: 13.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: target Assignee: unassigned at gcc dot gnu.org Reporter: james.hilliard1 at gmail dot com Target Milestone: --- I'm seeing this error which does not occur in llvm for a bpf test(test_xdp_vlan.c) in bpf-next, I'm not sure if this is an upstream bug in the test itself or a bug in gcc: progs/test_xdp_vlan.c: In function 'xdp_prognum1': progs/test_xdp_vlan.c:163:25: error: integer overflow in expression '(short int)(((__builtin_constant_p((int)vlan_hdr->h_vlan_TCI)) != 0 ? (int)(short unsigned int)((short int)((int)vlan_hdr->h_vlan_TCI << 8 >> 8) << 8 | (short int)((int)vlan_hdr->h_vlan_TCI << 0 >> 8 << 0)) & 61440 : (int)__builtin_bswap16(vlan_hdr->h_vlan_TCI) & 61440) << 8 >> 8) << 8' of type 'short int' results in '0' [-Werror=overflow] 163 | bpf_htons((bpf_ntohs(vlan_hdr->h_vlan_TCI) & 0xf000) | ^
[Bug target/107848] New: libbpf: ELF relo #0 in section #7 has unexpected type 12
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107848 Bug ID: 107848 Summary: libbpf: ELF relo #0 in section #7 has unexpected type 12 Product: gcc Version: 13.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: target Assignee: unassigned at gcc dot gnu.org Reporter: james.hilliard1 at gmail dot com Target Milestone: --- GCC gen object appears to not be working correctly in the bpf test bpf_dctcp_release.c GCC gen object failure: $ /home/buildroot/bpf-next/tools/testing/selftests/bpf/tools/sbin/bpftool --debug gen object /home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/bpf_dctcp_release.bpf.linked1.o /home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/bpf_dctcp_release.bpf.o libbpf: linker: adding object file '/home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/bpf_dctcp_release.bpf.o'... libbpf: ELF relo #0 in section #7 has unexpected type 12 in /home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/bpf_dctcp_release.bpf.o Error: failed to link '/home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/bpf_dctcp_release.bpf.o': Invalid argument (22) GCC BTF dump: $ /home/buildroot/bpf-next/tools/testing/selftests/bpf/tools/sbin/bpftool --debug btf dump file /home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/bpf_dctcp_release.bpf.o format raw [1] INT 'long int' size=8 bits_offset=0 nr_bits=64 encoding=SIGNED [2] INT 'long unsigned int' size=8 bits_offset=0 nr_bits=64 encoding=(none) [3] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED [4] INT 'long long int' size=8 bits_offset=0 nr_bits=64 encoding=SIGNED [5] FLOAT 'long double' size=8 [6] INT 'signed char' size=1 bits_offset=0 nr_bits=8 encoding=SIGNED [7] INT 'unsigned char' size=1 bits_offset=0 nr_bits=8 encoding=(none) [8] TYPEDEF '__u8' type_id=7 [9] INT 'short int' size=2 bits_offset=0 nr_bits=16 encoding=SIGNED [10] INT 'short unsigned int' size=2 bits_offset=0 nr_bits=16 encoding=(none) [11] TYPEDEF '__u16' type_id=10 [12] TYPEDEF '__s32' type_id=3 [13] INT 'unsigned int' size=4 bits_offset=0 nr_bits=32 encoding=(none) [14] TYPEDEF '__u32' type_id=13 [15] TYPEDEF '__s64' type_id=4 [16] INT 'long long unsigned int' size=8 bits_offset=0 nr_bits=64 encoding=(none) [17] TYPEDEF '__u64' type_id=16 [18] TYPEDEF '__be16' type_id=11 [19] TYPEDEF '__be32' type_id=14 [20] TYPEDEF '__sum16' type_id=11 [21] TYPEDEF '__wsum' type_id=14 [22] INT 'char' size=1 bits_offset=0 nr_bits=8 encoding=SIGNED [23] ARRAY '(anon)' type_id=22 index_type_id=2 nr_elems=16 [24] CONST '(anon)' type_id=22 [25] UNION '(anon)' size=8 vlen=1 'flow_keys' type_id=31 bits_offset=0 [26] STRUCT 'bpf_flow_keys' size=56 vlen=13 'nhoff' type_id=11 bits_offset=0 'thoff' type_id=11 bits_offset=16 'addr_proto' type_id=11 bits_offset=32 'is_frag' type_id=8 bits_offset=48 'is_first_frag' type_id=8 bits_offset=56 'is_encap' type_id=8 bits_offset=64 'ip_proto' type_id=8 bits_offset=72 'n_proto' type_id=18 bits_offset=80 'sport' type_id=18 bits_offset=96 'dport' type_id=18 bits_offset=112 '(anon)' type_id=27 bits_offset=128 'flags' type_id=14 bits_offset=384 'flow_label' type_id=19 bits_offset=416 [27] UNION '(anon)' size=32 vlen=2 '(anon)' type_id=28 bits_offset=0 '(anon)' type_id=29 bits_offset=0 [28] STRUCT '(anon)' size=8 vlen=2 'ipv4_src' type_id=19 bits_offset=0 'ipv4_dst' type_id=19 bits_offset=32 [29] STRUCT '(anon)' size=32 vlen=2 'ipv6_src' type_id=30 bits_offset=0 'ipv6_dst' type_id=30 bits_offset=128 [30] ARRAY '(anon)' type_id=14 index_type_id=2 nr_elems=4 [31] PTR '(anon)' type_id=26 [32] UNION '(anon)' size=8 vlen=1 'sk' type_id=34 bits_offset=0 [33] STRUCT 'bpf_sock' size=80 vlen=14 'bound_dev_if' type_id=14 bits_offset=0 'family' type_id=14 bits_offset=32 'type' type_id=14 bits_offset=64 'protocol' type_id=14 bits_offset=96 'mark' type_id=14 bits_offset=128 'priority' type_id=14 bits_offset=160 'src_ip4' type_id=14 bits_offset=192 'src_ip6' type_id=30 bits_offset=224 'src_port' type_id=14 bits_offset=352
[Bug target/107848] libbpf: ELF relo #0 in section #7 has unexpected type 12
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107848 --- Comment #1 from James Hilliard --- Working LLVM BTF Dump: $ /home/buildroot/bpf-next/tools/testing/selftests/bpf/tools/sbin/bpftool --debug btf dump file /home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_dctcp_release.bpf.o format raw [1] PTR '(anon)' type_id=2 [2] INT 'unsigned long long' size=8 bits_offset=0 nr_bits=64 encoding=(none) [3] FUNC_PROTO '(anon)' ret_type_id=0 vlen=1 'ctx' type_id=1 [4] FUNC 'dctcp_nouse_release' type_id=3 linkage=global [5] INT 'char' size=1 bits_offset=0 nr_bits=8 encoding=SIGNED [6] ARRAY '(anon)' type_id=5 index_type_id=7 nr_elems=4 [7] INT '__ARRAY_SIZE_TYPE__' size=4 bits_offset=0 nr_bits=32 encoding=(none) [8] VAR '_license' type_id=6, linkage=global [9] CONST '(anon)' type_id=5 [10] ARRAY '(anon)' type_id=9 index_type_id=7 nr_elems=6 [11] VAR 'cubic' type_id=10, linkage=global [12] STRUCT 'tcp_congestion_ops' size=128 vlen=15 'name' type_id=13 bits_offset=0 'flags' type_id=14 bits_offset=128 'init' type_id=16 bits_offset=192 'release' type_id=16 bits_offset=256 'ssthresh' type_id=25 bits_offset=320 'cong_avoid' type_id=27 bits_offset=384 'set_state' type_id=29 bits_offset=448 'cwnd_event' type_id=32 bits_offset=512 'in_ack_event' type_id=35 bits_offset=576 'undo_cwnd' type_id=25 bits_offset=640 'pkts_acked' type_id=37 bits_offset=704 'min_tso_segs' type_id=25 bits_offset=768 'sndbuf_expand' type_id=25 bits_offset=832 'cong_control' type_id=44 bits_offset=896 'owner' type_id=52 bits_offset=960 [13] ARRAY '(anon)' type_id=5 index_type_id=7 nr_elems=16 [14] TYPEDEF '__u32' type_id=15 [15] INT 'unsigned int' size=4 bits_offset=0 nr_bits=32 encoding=(none) [16] PTR '(anon)' type_id=17 [17] FUNC_PROTO '(anon)' ret_type_id=0 vlen=1 '(anon)' type_id=18 [18] PTR '(anon)' type_id=19 [19] STRUCT 'sock' size=24 vlen=3 '__sk_common' type_id=20 bits_offset=0 'sk_pacing_rate' type_id=24 bits_offset=64 'sk_pacing_status' type_id=14 bits_offset=128 [20] STRUCT 'sock_common' size=4 vlen=2 'skc_state' type_id=21 bits_offset=0 'skc_num' type_id=22 bits_offset=16 [21] INT 'unsigned char' size=1 bits_offset=0 nr_bits=8 encoding=(none) [22] TYPEDEF '__u16' type_id=23 [23] INT 'unsigned short' size=2 bits_offset=0 nr_bits=16 encoding=(none) [24] INT 'unsigned long' size=8 bits_offset=0 nr_bits=64 encoding=(none) [25] PTR '(anon)' type_id=26 [26] FUNC_PROTO '(anon)' ret_type_id=14 vlen=1 '(anon)' type_id=18 [27] PTR '(anon)' type_id=28 [28] FUNC_PROTO '(anon)' ret_type_id=0 vlen=3 '(anon)' type_id=18 '(anon)' type_id=14 '(anon)' type_id=14 [29] PTR '(anon)' type_id=30 [30] FUNC_PROTO '(anon)' ret_type_id=0 vlen=2 '(anon)' type_id=18 '(anon)' type_id=31 [31] TYPEDEF '__u8' type_id=21 [32] PTR '(anon)' type_id=33 [33] FUNC_PROTO '(anon)' ret_type_id=0 vlen=2 '(anon)' type_id=18 '(anon)' type_id=34 [34] ENUM 'tcp_ca_event' encoding=UNSIGNED size=4 vlen=6 'CA_EVENT_TX_START' val=0 'CA_EVENT_CWND_RESTART' val=1 'CA_EVENT_COMPLETE_CWR' val=2 'CA_EVENT_LOSS' val=3 'CA_EVENT_ECN_NO_CE' val=4 'CA_EVENT_ECN_IS_CE' val=5 [35] PTR '(anon)' type_id=36 [36] FUNC_PROTO '(anon)' ret_type_id=0 vlen=2 '(anon)' type_id=18 '(anon)' type_id=14 [37] PTR '(anon)' type_id=38 [38] FUNC_PROTO '(anon)' ret_type_id=0 vlen=2 '(anon)' type_id=18 '(anon)' type_id=39 [39] PTR '(anon)' type_id=40 [40] CONST '(anon)' type_id=41 [41] STRUCT 'ack_sample' size=12 vlen=3 'pkts_acked' type_id=14 bits_offset=0 'rtt_us' type_id=42 bits_offset=32 'in_flight' type_id=14 bits_offset=64 [42] TYPEDEF '__s32' type_id=43 [43] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED [44] PTR '(anon)' type_id=45 [45] FUNC_PROTO '(anon)' ret_type_id=0 vlen=2 '(anon)' type_id=18 '(anon)' type_id=46 [46] PTR '(anon)' type_id=47 [47] CONST '(anon)' type_id=48 [48] STRUCT 'rate_sample' size=56 vlen=13 'prior_mstamp' type_id=49 bits_offset=0 'prior_delivered' type_id=14 bits_offset=64 'delivered' type_id=42 bits_offset=96 'interval_us' type_id=50 bits_offset=128 'snd_interval_us' type_id=14 bits_offset=192 'rcv_interval_us' type_id=14 bits_offset=224 'rtt_us' type_id=50 bits_offset=256 'losses' type_id=43 bits_offset=320 'acked_sacked' type_id=14 bits_offset=352 'prior_in_flight' type_id=14 bits_offset=384 'is_app_limited' type_id=51 bits_offset=416 'is_retrans' type_id=51 bits_offset=424 'is_ack_delayed' type_id=51 bits_offset=432 [49] TYPEDEF '__u64' type_id=2 [50] INT 'long' size=8 bits_offset=0 nr_bits=64 encoding=SIGNED [51] INT '_Bool' size=1 bits_offset=0 nr_bits=8 encoding=BOOL [52] PTR '(anon)' type_id=0 [53] VAR 'dctc
[Bug c/107846] [13 Regression] error: result of '8000 << 8' requires 22 bits to represent, but 'short int' only has 16 bits
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107846 --- Comment #7 from James Hilliard --- (In reply to Jakub Jelinek from comment #6) > Created attachment 53984 [details] > gcc13-pr107846.patch > > Untested fix. This appears to fix error, the warning is still present: progs/test_tc_tunnel.c: In function '__encap_ipv4': progs/test_tc_tunnel.c:228:31: warning: taking address of packed member of 'struct v4hdr' may result in an unaligned pointer value [-Waddress-of-packed-member] 228 | set_ipv4_csum((void *)&h_outer.ip); | ^~~
[Bug c/107846] [13 Regression] error: result of '8000 << 8' requires 22 bits to represent, but 'short int' only has 16 bits
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107846 --- Comment #10 from James Hilliard --- (In reply to Jakub Jelinek from comment #8) > (In reply to James Hilliard from comment #7) > > (In reply to Jakub Jelinek from comment #6) > > > Created attachment 53984 [details] > > > gcc13-pr107846.patch > > > > > > Untested fix. > > > > This appears to fix error, the warning is still present: > > progs/test_tc_tunnel.c: In function '__encap_ipv4': > > progs/test_tc_tunnel.c:228:31: warning: taking address of packed member of > > 'struct v4hdr' may result in an unaligned pointer value > > [-Waddress-of-packed-member] > > 228 | set_ipv4_csum((void *)&h_outer.ip); > > | ^~~ > > That is unrelated and why do you think it is wrong? I don't think that > warning has false positives. I wasn't entirely sure if it was wrong or not, was just testing the patch.
[Bug target/106773] libbpf: failed to find BTF info for global/extern symbol 'bpf_link_fops'
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106773 --- Comment #5 from James Hilliard --- (In reply to David Faust from comment #4) > Created attachment 53993 [details] > proposed patch > > Should fix the remaining issues with 'extern' linkage and the missing > 'const' modifier (and includes the earlier partial fixes in this bug) Fixes the reported test failure but some others(unclear if related to this bug) are still failing such as tailcall_bpf2bpf3.c: $ /home/buildroot/bpf-next/tools/testing/selftests/bpf/tools/sbin/bpftool --debug gen object /home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/tailcall_bpf2bpf3.bpf.linked1.o /home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/tailcall_bpf2bpf3.bpf.o libbpf: linker: adding object file '/home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/tailcall_bpf2bpf3.bpf.o'... libbpf: failed to find BTF info for global/extern symbol 'llvm.bpf.load.word' Error: failed to link '/home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/tailcall_bpf2bpf3.bpf.o': No such file or directory (2) GCC BTF dump: $ /home/buildroot/bpf-next/tools/testing/selftests/bpf/tools/sbin/bpftool --debug btf dump file /home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/tailcall_bpf2bpf3.bpf.o format raw [1] INT 'signed char' size=1 bits_offset=0 nr_bits=8 encoding=SIGNED [2] INT 'unsigned char' size=1 bits_offset=0 nr_bits=8 encoding=(none) [3] TYPEDEF '__u8' type_id=2 [4] INT 'short int' size=2 bits_offset=0 nr_bits=16 encoding=SIGNED [5] INT 'short unsigned int' size=2 bits_offset=0 nr_bits=16 encoding=(none) [6] TYPEDEF '__u16' type_id=5 [7] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED [8] TYPEDEF '__s32' type_id=7 [9] INT 'unsigned int' size=4 bits_offset=0 nr_bits=32 encoding=(none) [10] TYPEDEF '__u32' type_id=9 [11] CONST '(anon)' type_id=10 [12] INT 'long long int' size=8 bits_offset=0 nr_bits=64 encoding=SIGNED [13] TYPEDEF '__s64' type_id=12 [14] INT 'long long unsigned int' size=8 bits_offset=0 nr_bits=64 encoding=(none) [15] TYPEDEF '__u64' type_id=14 [16] TYPEDEF '__be16' type_id=6 [17] TYPEDEF '__be32' type_id=10 [18] TYPEDEF '__wsum' type_id=10 [19] INT 'long unsigned int' size=8 bits_offset=0 nr_bits=64 encoding=(none) [20] ENUM 'bpf_map_type' encoding=UNSIGNED size=4 vlen=34 'BPF_MAP_TYPE_UNSPEC' val=0 'BPF_MAP_TYPE_HASH' val=1 'BPF_MAP_TYPE_ARRAY' val=2 'BPF_MAP_TYPE_PROG_ARRAY' val=3 'BPF_MAP_TYPE_PERF_EVENT_ARRAY' val=4 'BPF_MAP_TYPE_PERCPU_HASH' val=5 'BPF_MAP_TYPE_PERCPU_ARRAY' val=6 'BPF_MAP_TYPE_STACK_TRACE' val=7 'BPF_MAP_TYPE_CGROUP_ARRAY' val=8 'BPF_MAP_TYPE_LRU_HASH' val=9 'BPF_MAP_TYPE_LRU_PERCPU_HASH' val=10 'BPF_MAP_TYPE_LPM_TRIE' val=11 'BPF_MAP_TYPE_ARRAY_OF_MAPS' val=12 'BPF_MAP_TYPE_HASH_OF_MAPS' val=13 'BPF_MAP_TYPE_DEVMAP' val=14 'BPF_MAP_TYPE_SOCKMAP' val=15 'BPF_MAP_TYPE_CPUMAP' val=16 'BPF_MAP_TYPE_XSKMAP' val=17 'BPF_MAP_TYPE_SOCKHASH' val=18 'BPF_MAP_TYPE_CGROUP_STORAGE_DEPRECATED' val=19 'BPF_MAP_TYPE_CGROUP_STORAGE' val=19 'BPF_MAP_TYPE_REUSEPORT_SOCKARRAY' val=20 'BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE' val=21 'BPF_MAP_TYPE_QUEUE' val=22 'BPF_MAP_TYPE_STACK' val=23 'BPF_MAP_TYPE_SK_STORAGE' val=24 'BPF_MAP_TYPE_DEVMAP_HASH' val=25 'BPF_MAP_TYPE_STRUCT_OPS' val=26 'BPF_MAP_TYPE_RINGBUF' val=27 'BPF_MAP_TYPE_INODE_STORAGE' val=28 'BPF_MAP_TYPE_TASK_STORAGE' val=29 'BPF_MAP_TYPE_BLOOM_FILTER' val=30 'BPF_MAP_TYPE_USER_RINGBUF' val=31 'BPF_MAP_TYPE_CGRP_STORAGE' val=32 [21] INT 'char' size=1 bits_offset=0 nr_bits=8 encoding=SIGNED [22] CONST '(anon)' type_id=21 [23] VOLATILE '(anon)' type_id=21 [24] UNION '(anon)' size=8 vlen=1 'flow_keys' type_id=30 bits_offset=0 [25] STRUCT 'bpf_flow_keys' size=56 vlen=13 'nhoff' type_id=6 bits_offset=0 'thoff' type_id=6 bits_offset=16 'addr_proto' type_id=6 bits_offset=32 'is_frag' type_id=3 bits_offset=48 'is_first_frag' type_id=3 bits_offset=56 'is_encap' type_id=3 bits_offset=64 'ip_proto' type_id=3 bits_offset=72 'n_proto' type_id=16 bits_offset=80 'sport' type_id=16 bits_offset=96 'dport' type_id=16 bits_offset=112 '(anon)' type_id=26 bits_offset=128 'flags' type_id=10 bits_offset=384 'flow_label' type_id=17 bits_offset=416 [26] UNION '(anon)' size=32 vlen=2 '(anon)' type_id=27 bits_offset=0 '(anon)' type_id=28 bits_offset=0 [27] STRUCT '(anon)' size=8 vlen=2 'ipv4_src' type_id=17 bits_offset=0 'ipv4_dst' type_id=17 bits_offset=32 [28] STRUCT '(anon)' size=32 vlen=2 'ipv6_src' type_id=29 bits_offset=0 'ipv6_dst' type_id=29 bits_offset=128 [29] ARRAY '(anon)' type_id=10 index_type_id=19 nr_elems=4 [30] PTR '(anon)' type_id=25 [31] U
[Bug target/106773] libbpf: failed to find BTF info for global/extern symbol 'bpf_link_fops'
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106773 --- Comment #6 from James Hilliard --- https://github.com/torvalds/linux/blob/v6.1-rc7/tools/testing/selftests/bpf/bpf_legacy.h
[Bug target/106773] libbpf: failed to find BTF info for global/extern symbol 'bpf_link_fops'
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106773 --- Comment #7 from James Hilliard --- There's also this error during skeleton generation for kfunc_call_test.c: $ /home/buildroot/bpf-next/tools/testing/selftests/bpf/tools/sbin/bpftool --debug gen skeleton /home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/kfunc_call_test.bpf.linked3.o name kfunc_call_test libbpf: loading object 'kfunc_call_test' from buffer libbpf: elf: section(2) .symtab, size 648, link 1, flags 0, type=2 libbpf: elf: section(3) .data, size 0, link 0, flags 3, type=1 libbpf: elf: skipping section(3) .data (size 0) libbpf: elf: section(4) .bss, size 0, link 0, flags 3, type=8 libbpf: elf: section(5) tc, size 1120, link 0, flags 6, type=1 libbpf: sec 'tc': found program 'kfunc_call_test2' at insn offset 0 (0 bytes), code size 13 insns (104 bytes) libbpf: sec 'tc': found program 'kfunc_call_test1' at insn offset 13 (104 bytes), code size 21 insns (168 bytes) libbpf: sec 'tc': found program 'kfunc_call_test_ref_btf_id' at insn offset 34 (272 bytes), code size 22 insns (176 bytes) libbpf: sec 'tc': found program 'kfunc_call_test_pass' at insn offset 56 (448 bytes), code size 52 insns (416 bytes) libbpf: sec 'tc': found program 'kfunc_call_test_get_mem' at insn offset 108 (864 bytes), code size 32 insns (256 bytes) libbpf: elf: section(6) syscall, size 152, link 0, flags 6, type=1 libbpf: sec 'syscall': found program 'kfunc_syscall_test' at insn offset 0 (0 bytes), code size 15 insns (120 bytes) libbpf: sec 'syscall': found program 'kfunc_syscall_test_null' at insn offset 15 (120 bytes), code size 4 insns (32 bytes) libbpf: elf: section(7) license, size 4, link 0, flags 3, type=1 libbpf: license of kfunc_call_test is GPL libbpf: elf: section(8) .comment, size 43, link 0, flags 30, type=1 libbpf: elf: skipping unrecognized data section(8) .comment libbpf: elf: section(9) .reltc, size 272, link 2, flags 40, type=9 libbpf: elf: section(10) .relsyscall, size 64, link 2, flags 40, type=9 libbpf: elf: section(11) .BTF, size 467261, link 0, flags 0, type=1 libbpf: looking for externs among 27 symbols... libbpf: failed to find BTF for extern 'bpf_kfunc_call_test2': -22 Error: failed to open BPF object file: Invalid argument
[Bug target/106773] libbpf: failed to find BTF info for global/extern symbol 'bpf_link_fops'
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106773 --- Comment #10 from James Hilliard --- (In reply to David Faust from comment #9) > Created attachment 54002 [details] > updated patch > > Update the 'extern' variable marking, and also mark 'extern' funcs. That fixes the issue in kfunc_call_test.c but I'm still hitting a few like this in cb_refs.c: $ /home/buildroot/bpf-next/tools/testing/selftests/bpf/tools/sbin/bpftool --debug gen skeleton /home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/cb_refs.bpf.linked3.o name cb_refs libbpf: loading object 'cb_refs' from buffer libbpf: elf: section(2) .symtab, size 504, link 1, flags 0, type=2 libbpf: elf: section(3) .text, size 240, link 0, flags 6, type=1 libbpf: sec '.text': found program 'cb1' at insn offset 0 (0 bytes), code size 4 insns (32 bytes) libbpf: sec '.text': found program 'cb2' at insn offset 4 (32 bytes), code size 9 insns (72 bytes) libbpf: sec '.text': found program 'cb' at insn offset 13 (104 bytes), code size 2 insns (16 bytes) libbpf: sec '.text': found program 'cb3' at insn offset 15 (120 bytes), code size 15 insns (120 bytes) libbpf: elf: section(4) .data, size 0, link 0, flags 3, type=1 libbpf: elf: skipping section(4) .data (size 0) libbpf: elf: section(5) .bss, size 0, link 0, flags 3, type=8 libbpf: elf: section(6) ?tc, size 648, link 0, flags 6, type=1 libbpf: sec '?tc': found program 'underflow_prog' at insn offset 0 (0 bytes), code size 17 insns (136 bytes) libbpf: sec '?tc': found program 'leak_prog' at insn offset 17 (136 bytes), code size 26 insns (208 bytes) libbpf: sec '?tc': found program 'nested_cb' at insn offset 43 (344 bytes), code size 20 insns (160 bytes) libbpf: sec '?tc': found program 'non_cb_transfer_ref' at insn offset 63 (504 bytes), code size 18 insns (144 bytes) libbpf: elf: section(7) license, size 4, link 0, flags 3, type=1 libbpf: license of cb_refs is GPL libbpf: elf: section(8) .maps, size 32, link 0, flags 3, type=1 libbpf: elf: section(9) .comment, size 43, link 0, flags 30, type=1 libbpf: elf: skipping unrecognized data section(9) .comment libbpf: elf: section(10) .rel.text, size 80, link 2, flags 40, type=9 libbpf: elf: section(11) .rel?tc, size 224, link 2, flags 40, type=9 libbpf: elf: section(12) .BTF, size 468228, link 0, flags 0, type=1 libbpf: looking for externs among 21 symbols... libbpf: failed to find BTF for extern 'bpf_kfunc_call_test_release' [8112] section: -2 Error: failed to open BPF object file: No such file or directory
[Bug target/106773] libbpf: failed to find BTF info for global/extern symbol 'bpf_link_fops'
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106773 --- Comment #11 from James Hilliard --- Also hitting this one in cgroup_hierarchical_stats.c: $ /home/buildroot/bpf-next/tools/testing/selftests/bpf/tools/sbin/bpftool --debug gen skeleton /home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/cgroup_hierarchical_stats.bpf.linked3.o name cgroup_hierarchical_stat libbpf: loading object 'cgroup_hierarchical_stat' from buffer libbpf: elf: section(2) .symtab, size 504, link 1, flags 0, type=2 libbpf: elf: section(3) .data, size 0, link 0, flags 3, type=1 libbpf: elf: skipping section(3) .data (size 0) libbpf: elf: section(4) .bss, size 0, link 0, flags 3, type=8 libbpf: elf: section(5) fentry/cgroup_attach_task, size 264, link 0, flags 6, type=1 libbpf: sec 'fentry/cgroup_attach_task': found program 'counter' at insn offset 0 (0 bytes), code size 33 insns (264 bytes) libbpf: elf: section(6) fentry/bpf_rstat_flush, size 656, link 0, flags 6, type=1 libbpf: sec 'fentry/bpf_rstat_flush': found program 'flusher' at insn offset 0 (0 bytes), code size 82 insns (656 bytes) libbpf: elf: section(7) iter.s/cgroup, size 352, link 0, flags 6, type=1 libbpf: sec 'iter.s/cgroup': found program 'dumper' at insn offset 0 (0 bytes), code size 44 insns (352 bytes) libbpf: elf: section(8) .rodata, size 67, link 0, flags 2, type=1 libbpf: elf: section(9) .maps, size 64, link 0, flags 3, type=1 libbpf: elf: section(10) license, size 4, link 0, flags 3, type=1 libbpf: license of cgroup_hierarchical_stat is GPL libbpf: elf: section(11) .comment, size 43, link 0, flags 30, type=1 libbpf: elf: skipping unrecognized data section(11) .comment libbpf: elf: section(12) .relfentry/cgroup_attach_task, size 48, link 2, flags 40, type=9 libbpf: elf: section(13) .relfentry/bpf_rstat_flush, size 96, link 2, flags 40, type=9 libbpf: elf: section(14) .reliter.s/cgroup, size 64, link 2, flags 40, type=9 libbpf: elf: section(15) .BTF, size 468873, link 0, flags 0, type=1 libbpf: looking for externs among 21 symbols... libbpf: failed to find BTF for extern 'cgroup_rstat_updated' [8134] section: -2 Error: failed to open BPF object file: No such file or directory
[Bug target/106773] libbpf: failed to find BTF info for global/extern symbol 'bpf_link_fops'
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106773 --- Comment #12 from James Hilliard --- (In reply to James Hilliard from comment #10) > (In reply to David Faust from comment #9) > > Created attachment 54002 [details] > > updated patch > > > > Update the 'extern' variable marking, and also mark 'extern' funcs. > > That fixes the issue in kfunc_call_test.c Actually I think there's still an issue here, did a full clean test build and am now hitting this error: $ /home/buildroot/bpf-next/tools/testing/selftests/bpf/tools/sbin/bpftool --debug gen skeleton /home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/kfunc_call_test.bpf.linked3.o name kfunc_call_test libbpf: loading object 'kfunc_call_test' from buffer libbpf: elf: section(2) .symtab, size 648, link 1, flags 0, type=2 libbpf: elf: section(3) .data, size 0, link 0, flags 3, type=1 libbpf: elf: skipping section(3) .data (size 0) libbpf: elf: section(4) .bss, size 0, link 0, flags 3, type=8 libbpf: elf: section(5) tc, size 1120, link 0, flags 6, type=1 libbpf: sec 'tc': found program 'kfunc_call_test2' at insn offset 0 (0 bytes), code size 13 insns (104 bytes) libbpf: sec 'tc': found program 'kfunc_call_test1' at insn offset 13 (104 bytes), code size 21 insns (168 bytes) libbpf: sec 'tc': found program 'kfunc_call_test_ref_btf_id' at insn offset 34 (272 bytes), code size 22 insns (176 bytes) libbpf: sec 'tc': found program 'kfunc_call_test_pass' at insn offset 56 (448 bytes), code size 52 insns (416 bytes) libbpf: sec 'tc': found program 'kfunc_call_test_get_mem' at insn offset 108 (864 bytes), code size 32 insns (256 bytes) libbpf: elf: section(6) syscall, size 152, link 0, flags 6, type=1 libbpf: sec 'syscall': found program 'kfunc_syscall_test' at insn offset 0 (0 bytes), code size 15 insns (120 bytes) libbpf: sec 'syscall': found program 'kfunc_syscall_test_null' at insn offset 15 (120 bytes), code size 4 insns (32 bytes) libbpf: elf: section(7) license, size 4, link 0, flags 3, type=1 libbpf: license of kfunc_call_test is GPL libbpf: elf: section(8) .comment, size 43, link 0, flags 30, type=1 libbpf: elf: skipping unrecognized data section(8) .comment libbpf: elf: section(9) .reltc, size 272, link 2, flags 40, type=9 libbpf: elf: section(10) .relsyscall, size 64, link 2, flags 40, type=9 libbpf: elf: section(11) .BTF, size 469068, link 0, flags 0, type=1 libbpf: looking for externs among 27 symbols... libbpf: failed to find BTF for extern 'bpf_kfunc_call_test2' [8134] section: -2 Error: failed to open BPF object file: No such file or directory
[Bug target/106773] libbpf: failed to find BTF info for global/extern symbol 'bpf_link_fops'
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106773 --- Comment #14 from James Hilliard --- (In reply to David Faust from comment #13) > Created attachment 54017 [details] > DATASEC entries for extern funcs > > Applies on top of 54002: updated patch > Adds emission of DATASEC entries for extern funcs. Rough, needs cleanup. Seeing a regression in get_func_ip_test.c looks like: $ /home/buildroot/bpf-next/tools/testing/selftests/bpf/tools/sbin/bpftool --debug gen object /home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/get_func_ip_test.bpf.linked1.o /home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/get_func_ip_test.bpf.o libbpf: linker: adding object file '/home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/get_func_ip_test.bpf.o'... libbpf: Invalid BTF total size: 25303 libbpf: failed to parse .BTF from /home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/get_func_ip_test.bpf.o: -22 Error: failed to link '/home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/get_func_ip_test.bpf.o': Invalid argument (22) Broken GCC BTF dump: $ /home/buildroot/bpf-next/tools/testing/selftests/bpf/tools/sbin/bpftool --debug btf dump file /home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/get_func_ip_test.bpf.o format raw libbpf: Invalid BTF total size: 25303 Error: failed to load BTF from /home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/get_func_ip_test.bpf.o: Invalid argument Working LLVM btf dump: $ /home/buildroot/bpf-next/tools/testing/selftests/bpf/tools/sbin/bpftool --debug btf dump file /home/buildroot/bpf-next/tools/testing/selftests/bpf/get_func_ip_test.bpf.o format raw [1] FUNC_PROTO '(anon)' ret_type_id=2 vlen=0 [2] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED [3] FUNC 'unused' type_id=1 linkage=global [4] PTR '(anon)' type_id=5 [5] INT 'unsigned long long' size=8 bits_offset=0 nr_bits=64 encoding=(none) [6] FUNC_PROTO '(anon)' ret_type_id=2 vlen=1 'ctx' type_id=4 [7] FUNC 'test1' type_id=6 linkage=global [8] FUNC_PROTO '(anon)' ret_type_id=2 vlen=1 'ctx' type_id=4 [9] FUNC 'test2' type_id=8 linkage=global [10] PTR '(anon)' type_id=11 [11] FWD 'pt_regs' fwd_kind=struct [12] FUNC_PROTO '(anon)' ret_type_id=2 vlen=1 'ctx' type_id=10 [13] FUNC 'test3' type_id=12 linkage=global [14] FUNC_PROTO '(anon)' ret_type_id=2 vlen=1 'ctx' type_id=10 [15] FUNC 'test4' type_id=14 linkage=global [16] FUNC_PROTO '(anon)' ret_type_id=2 vlen=1 'ctx' type_id=4 [17] FUNC 'test5' type_id=16 linkage=global [18] FUNC_PROTO '(anon)' ret_type_id=2 vlen=1 'ctx' type_id=10 [19] FUNC 'test6' type_id=18 linkage=global [20] INT 'char' size=1 bits_offset=0 nr_bits=8 encoding=SIGNED [21] ARRAY '(anon)' type_id=20 index_type_id=22 nr_elems=4 [22] INT '__ARRAY_SIZE_TYPE__' size=4 bits_offset=0 nr_bits=32 encoding=(none) [23] VAR '_license' type_id=21, linkage=global [24] INT '_Bool' size=1 bits_offset=0 nr_bits=8 encoding=BOOL [25] VAR 'CONFIG_X86_KERNEL_IBT' type_id=24, linkage=extern [26] TYPEDEF '__u64' type_id=5 [27] VAR 'test1_result' type_id=26, linkage=global [28] VAR 'test2_result' type_id=26, linkage=global [29] VAR 'test3_result' type_id=26, linkage=global [30] CONST '(anon)' type_id=0 [31] VAR 'bpf_fentry_test3' type_id=30, linkage=extern [32] VAR 'test4_result' type_id=26, linkage=global [33] VAR 'test5_result' type_id=26, linkage=global [34] VAR 'test6_result' type_id=26, linkage=global [35] VAR 'bpf_fentry_test1' type_id=30, linkage=extern [36] VAR 'bpf_fentry_test2' type_id=30, linkage=extern [37] VAR 'bpf_fentry_test4' type_id=30, linkage=extern [38] VAR 'bpf_modify_return_test' type_id=30, linkage=extern [39] DATASEC '.bss' size=0 vlen=6 type_id=27 offset=0 size=8 (VAR 'test1_result') type_id=28 offset=0 size=8 (VAR 'test2_result') type_id=29 offset=0 size=8 (VAR 'test3_result') type_id=32 offset=0 size=8 (VAR 'test4_result') type_id=33 offset=0 size=8 (VAR 'test5_result') type_id=34 offset=0 size=8 (VAR 'test6_result') [40] DATASEC '.kconfig' size=0 vlen=1 type_id=25 offset=0 size=1 (VAR 'CONFIG_X86_KERNEL_IBT') [41] DATASEC '.ksyms' size=0 vlen=5 type_id=31 offset=0 size=1 (VAR 'bpf_fentry_test3') type_id=35 offset=0 size=1 (VAR 'bpf_fentry_test1') type_id=36 offset=0 size=1 (VAR 'bpf_fentry_test2') type_id=37 offset=0 size=1 (VAR 'bpf_fentry_test4') type_id=38 offset=0 size=1 (VAR 'bpf_modify_return_test') [42] DATASEC 'license' size=0 vlen=1 type_id=23 offset=0 size=4 (VAR '_license')
[Bug target/106773] libbpf: failed to find BTF info for global/extern symbol 'bpf_link_fops'
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106773 --- Comment #16 from James Hilliard --- (In reply to David Faust from comment #15) > Created attachment 54021 [details] > [v2] DATASEC entries for extern funcs > > v2 fixes an off-by-one bug introduced in the patch which was causing > libbpf: Invalid BTF total size Yeah, this seems to work.
[Bug target/107983] New: btf: bad call relo against 'test_task_acquire_release_current' in section 'tp_btf/task_newtask'
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107983 Bug ID: 107983 Summary: btf: bad call relo against 'test_task_acquire_release_current' in section 'tp_btf/task_newtask' Product: gcc Version: 13.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: target Assignee: unassigned at gcc dot gnu.org Reporter: james.hilliard1 at gmail dot com Target Milestone: --- I'm seeing this failure in GCC which does not occur with LLVM: $ /home/buildroot/bpf-next/tools/testing/selftests/bpf/tools/sbin/bpftool --debug gen skeleton /home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/task_kfunc_success.bpf.linked3.o name task_kfunc_success libbpf: loading object 'task_kfunc_success' from buffer libbpf: elf: section(2) .symtab, size 600, link 1, flags 0, type=2 libbpf: elf: section(3) .data, size 0, link 0, flags 3, type=1 libbpf: elf: skipping section(3) .data (size 0) libbpf: elf: section(4) .bss, size 8, link 0, flags 3, type=8 libbpf: elf: section(5) tp_btf/task_newtask, size 2704, link 0, flags 6, type=1 libbpf: sec 'tp_btf/task_newtask': found program 'test_task_acquire_release_argument' at insn offset 0 (0 bytes), code size 13 insns (104 bytes) libbpf: sec 'tp_btf/task_newtask': found program 'test_task_acquire_release_current' at insn offset 13 (104 bytes), code size 13 insns (104 bytes) libbpf: sec 'tp_btf/task_newtask': found program 'test_task_acquire_leave_in_map' at insn offset 26 (208 bytes), code size 56 insns (448 bytes) libbpf: sec 'tp_btf/task_newtask': found program 'test_task_xchg_release' at insn offset 82 (656 bytes), code size 88 insns (704 bytes) libbpf: sec 'tp_btf/task_newtask': found program 'test_task_get_release' at insn offset 170 (1360 bytes), code size 86 insns (688 bytes) libbpf: sec 'tp_btf/task_newtask': found program 'test_task_current_acquire_release' at insn offset 256 (2048 bytes), code size 3 insns (24 bytes) libbpf: sec 'tp_btf/task_newtask': found program 'test_task_from_pid_arg' at insn offset 259 (2072 bytes), code size 26 insns (208 bytes) libbpf: sec 'tp_btf/task_newtask': found program 'test_task_from_pid_current' at insn offset 285 (2280 bytes), code size 26 insns (208 bytes) libbpf: sec 'tp_btf/task_newtask': found program 'test_task_from_pid_invalid' at insn offset 311 (2488 bytes), code size 27 insns (216 bytes) libbpf: elf: section(6) license, size 4, link 0, flags 3, type=1 libbpf: license of task_kfunc_success is GPL libbpf: elf: section(7) .maps, size 32, link 0, flags 3, type=1 libbpf: elf: section(8) .comment, size 43, link 0, flags 30, type=1 libbpf: elf: skipping unrecognized data section(8) .comment libbpf: elf: section(9) .reltp_btf/task_newtask, size 864, link 2, flags 40, type=9 libbpf: elf: section(10) .BTF, size 469313, link 0, flags 0, type=1 libbpf: looking for externs among 25 symbols... libbpf: collected 4 externs total libbpf: extern (ksym) #0: symbol 10, name bpf_task_acquire libbpf: extern (ksym) #1: symbol 21, name bpf_task_from_pid libbpf: extern (ksym) #2: symbol 18, name bpf_task_kptr_get libbpf: extern (ksym) #3: symbol 11, name bpf_task_release libbpf: map '__tasks_kfunc_map': at sec_idx 7, offset 0. libbpf: map '__tasks_kfunc_map': found type = 1. libbpf: map '__tasks_kfunc_map': found key [15], sz = 4. libbpf: map '__tasks_kfunc_map': found value [6621], sz = 8. libbpf: map '__tasks_kfunc_map': found max_entries = 1. libbpf: map 'task_kfu.bss' (global data): at sec_idx 4, offset 0, flags 400. libbpf: map 1 is "task_kfu.bss" libbpf: sec '.reltp_btf/task_newtask': collecting relocation for section(5) 'tp_btf/task_newtask' libbpf: sec '.reltp_btf/task_newtask': relo #0: insn #2 against 'pid' libbpf: prog 'test_task_acquire_release_argument': found data map 1 (task_kfu.bss, sec 4, off 0) for insn 2 libbpf: sec '.reltp_btf/task_newtask': relo #1: insn #8 against 'bpf_task_acquire' libbpf: prog 'test_task_acquire_release_argument': found extern #0 'bpf_task_acquire' (sym 10) for insn #8 libbpf: sec '.reltp_btf/task_newtask': relo #2: insn #10 against 'bpf_task_release' libbpf: prog 'test_task_acquire_release_argument': found extern #3 'bpf_task_release' (sym 11) for insn #10 libbpf: sec '.reltp_btf/task_newtask': relo #3: insn #14 against 'pid' libbpf: prog 'test_task_acquire_release_current': found data map 1 (task_kfu.bss, sec 4, off 0) for insn 1 libbpf: sec '.reltp_btf/task_newtask': relo #4: insn #21 against 'bpf_task_acquire&
[Bug target/107983] btf: bad call relo against 'test_task_acquire_release_current' in section 'tp_btf/task_newtask'
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107983 --- Comment #1 from James Hilliard --- Working LLVM btf dump: $ /home/buildroot/bpf-next/tools/testing/selftests/bpf/tools/sbin/bpftool --debug btf dump file /home/buildroot/bpf-next/tools/testing/selftests/bpf/task_kfunc_success.bpf.linked3.o format raw [1] PTR '(anon)' type_id=3 [2] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED [3] ARRAY '(anon)' type_id=2 index_type_id=4 nr_elems=1 [4] INT '__ARRAY_SIZE_TYPE__' size=4 bits_offset=0 nr_bits=32 encoding=(none) [5] PTR '(anon)' type_id=2 [6] PTR '(anon)' type_id=7 [7] STRUCT '__tasks_kfunc_map_value' size=8 vlen=1 'task' type_id=8 bits_offset=0 [8] PTR '(anon)' type_id=16 [9] STRUCT 'hash_map' size=32 vlen=4 'type' type_id=1 bits_offset=0 'key' type_id=5 bits_offset=64 'value' type_id=6 bits_offset=128 'max_entries' type_id=1 bits_offset=192 [10] VAR '__tasks_kfunc_map' type_id=9, linkage=global [11] PTR '(anon)' type_id=12 [12] INT 'unsigned long long' size=8 bits_offset=0 nr_bits=64 encoding=(none) [13] FUNC_PROTO '(anon)' ret_type_id=2 vlen=1 'ctx' type_id=11 [14] FUNC 'test_task_acquire_release_argument' type_id=13 linkage=global [15] FUNC_PROTO '(anon)' ret_type_id=8 vlen=1 '(anon)' type_id=8 [16] STRUCT 'task_struct' size=10048 vlen=253 'thread_info' type_id=17 bits_offset=0 '__state' type_id=21 bits_offset=192 'stack' type_id=22 bits_offset=256 'usage' type_id=23 bits_offset=320 'flags' type_id=21 bits_offset=352 'ptrace' type_id=21 bits_offset=384 'on_cpu' type_id=2 bits_offset=416 'wake_entry' type_id=27 bits_offset=448 'wakee_flips' type_id=21 bits_offset=576 'wakee_flip_decay_ts' type_id=18 bits_offset=640 'last_wakee' type_id=8 bits_offset=704 'recent_used_cpu' type_id=2 bits_offset=768 'wake_cpu' type_id=2 bits_offset=800 'on_rq' type_id=2 bits_offset=832 'prio' type_id=2 bits_offset=864 'static_prio' type_id=2 bits_offset=896 'normal_prio' type_id=2 bits_offset=928 'rt_priority' type_id=21 bits_offset=960 'se' type_id=34 bits_offset=1024 'rt' type_id=46 bits_offset=3072 'dl' type_id=48 bits_offset=3456 'sched_class' type_id=64 bits_offset=5248 'sched_task_group' type_id=66 bits_offset=5312 'stats' type_id=67 bits_offset=5632 'btrace_seq' type_id=21 bits_offset=7680 'policy' type_id=21 bits_offset=7712 'nr_cpus_allowed' type_id=2 bits_offset=7744 'cpus_ptr' type_id=68 bits_offset=7808 'user_cpus_ptr' type_id=71 bits_offset=7872 'cpus_mask' type_id=70 bits_offset=7936 'migration_pending' type_id=22 bits_offset=8064 'migration_disabled' type_id=33 bits_offset=8128 'migration_flags' type_id=33 bits_offset=8144 'rcu_read_lock_nesting' type_id=2 bits_offset=8160 'rcu_read_unlock_special' type_id=74 bits_offset=8192 'rcu_node_entry' type_id=38 bits_offset=8256 'rcu_blocked_node' type_id=76 bits_offset=8384 'rcu_tasks_nvcsw' type_id=18 bits_offset=8448 'rcu_tasks_holdout' type_id=60 bits_offset=8512 'rcu_tasks_idx' type_id=60 bits_offset=8520 'rcu_tasks_idle_cpu' type_id=2 bits_offset=8544 'rcu_tasks_holdout_list' type_id=38 bits_offset=8576 'trc_reader_nesting' type_id=2 bits_offset=8704 'trc_ipi_to_cpu' type_id=2 bits_offset=8736 'trc_reader_special' type_id=74 bits_offset=8768 'trc_holdout_list' type_id=38 bits_offset=8832 'trc_blkd_node' type_id=38 bits_offset=8960 'trc_blkd_cpu' type_id=2 bits_offset=9088 'sched_info' type_id=77 bits_offset=9152 'tasks' type_id=38 bits_offset=9408 'pushable_tasks' type_id=78 bits_offset=9536 'pushable_dl_tasks' type_id=36 bits_offset=9856 'mm' type_id=79 bits_offset=10048 'active_mm' type_id=79 bits_offset=10112 'rss_stat' type_id=80 bits_offset=10176 'exit_state' type_id=2 bits_offset=10336 'exit_code' type_id=2 bits_offset=10368 'exit_signal' type_id=2 bits_offset=10400 'pdeath_signal' type_id=2 bits_offset=10432 'jobctl' type_id=18 bits_offset=10496 'personality' type_id=21 bits_offset=10560 'sched_reset_on_fork' type_id=21 bits_offset=10592 bitfield_size=1 'sched_contributes_to_load' type_id=21 bits_offset=10593 bitfield_size=1 'sched_migrated' type_id=21 bits_offset=10594 bitfield_size=1 'sched_remote_wakeup' type_id=21 bits_offset=10624 bitfield_size=1 'in_execve' type_id=21 bits_offset=10625 bitfield_size=1 'in_iowait' type_id=21 bits_offset=10626 bitfield_size=1 'restore_sigmask' type_id=21 bits_offset=10627 bitfield_size=1 'in_user_fault' type_id=21 bits_offset=10628 bitfield_size=1 'brk_randomized' type_id=21 bits_offset=10629 bitfie
[Bug target/108189] New: anonymous struct declared inside parameter list will not be visible outside of this definition or declaration
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108189
Bug ID: 108189
Summary: anonymous struct declared inside parameter list will
not be visible outside of this definition or
declaration
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: james.hilliard1 at gmail dot com
Target Milestone: ---
I'm seeing this error which does not occur in llvm for a bpf
test(btf_dump_test_case_bitfields.c) in bpf-next:
progs/btf_dump_test_case_bitfields.c:85:7: error: anonymous struct declared
inside parameter list will not be visible outside of this definition or
declaration [-Werror]
85 | int f(struct {
| ^~
[Bug target/108189] anonymous struct declared inside parameter list will not be visible outside of this definition or declaration
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108189
--- Comment #2 from James Hilliard ---
(In reply to Andrew Pinski from comment #1)
> The error is correct at least for C before C23.
Hmm, seeing it with -std=gnu2x passed still:
/home/buildroot/opt/cross/bin/bpf-gcc -g -Werror -D__TARGET_ARCH_x86
-mlittle-endian
-I/home/buildroot/bpf-next/tools/bpf/resolve_btfids/libbpf/include
-I/home/buildroot/bpf-next/tools/testing/selftests/bpf/tools/include
-I/home/buildroot/bpf-next/tools/testing/selftests/bpf
-I/home/buildroot/bpf-next/tools/include/uapi
-I/home/buildroot/bpf-next/tools/testing/selftests/usr/include -gbtf -mco-re
-Wno-error=attributes -Wno-error=address-of-packed-member
-Wno-compare-distinct-pointer-types -std=gnu2x -idirafter
/usr/lib/gcc/x86_64-linux-gnu/11/include -idirafter /usr/local/include
-idirafter /usr/include/x86_64-linux-gnu -idirafter /usr/include -nostdinc -O2
-c progs/btf_dump_test_case_bitfields.c -mcpu=v3 -o
/home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/btf_dump_test_case_bitfields.bpf.o
progs/btf_dump_test_case_bitfields.c:85:7: error: anonymous struct declared
inside parameter list will not be visible outside of this definition or
declaration [-Werror]
85 | int f(struct {
| ^~
[Bug target/108189] anonymous struct declared inside parameter list will not be visible outside of this definition or declaration
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108189
--- Comment #8 from James Hilliard ---
(In reply to Andrew Pinski from comment #7)
> Yes the warning is really still correct even if a closer testcase would be:
> ```
> int f(struct {int t;} *b)
> {
> return b->t;
> }
>
> int f1(void *a)
> {
> return f(a);
> }
> ```
> I am actually shocked clang didn't implement this warning since there is no
> type which is compatible with the typeof *b outside of function f.
Yeah, clang with -std=gnu17 -pedantic doesn't even complain at all from the
looks of it. Does it make sense to allow disabling this specific warning in
GCC?
[Bug target/108189] anonymous struct declared inside parameter list will not be visible outside of this definition or declaration
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108189 --- Comment #9 from James Hilliard --- (In reply to Andrew Pinski from comment #5) > Also Clang does not implement this warning at all. > > It is a bug in bpf-next really. What would be the correct way to fix these in bpf-next?
[Bug target/108189] anonymous struct declared inside parameter list will not be visible outside of this definition or declaration
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108189 --- Comment #11 from James Hilliard --- (In reply to Andrew Pinski from comment #1) > The error is correct at least for C before C23. Can you clarify where exactly in the C23 specification that this will be allowed?
[Bug debug/109253] New: libbpf: failed to find BTF info for global/extern symbol '__divdi3'
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109253 Bug ID: 109253 Summary: libbpf: failed to find BTF info for global/extern symbol '__divdi3' Product: gcc Version: 13.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: debug Assignee: unassigned at gcc dot gnu.org Reporter: james.hilliard1 at gmail dot com Target Milestone: --- I'm seeing this gen object error which does not occur in llvm for a bpf test(tcp_ca_write_sk_pacing.c) in bpf-next. GCC gen object failure: $ /home/buildroot/bpf-next/tools/testing/selftests/bpf/tools/sbin/bpftool --debug gen object /home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/tcp_ca_write_sk_pacing.bpf.linked1.o /home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/tcp_ca_write_sk_pacing.bpf.o libbpf: linker: adding object file '/home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/tcp_ca_write_sk_pacing.bpf.o'... libbpf: failed to find BTF info for global/extern symbol '__divdi3' Error: failed to link '/home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/tcp_ca_write_sk_pacing.bpf.o': No such file or directory (2)
[Bug target/109255] New: libbpf: global 'input_data1': section mismatch 4 vs 5
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109255 Bug ID: 109255 Summary: libbpf: global 'input_data1': section mismatch 4 vs 5 Product: gcc Version: 13.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: target Assignee: unassigned at gcc dot gnu.org Reporter: james.hilliard1 at gmail dot com Target Milestone: --- I'm seeing this gen object error which does not occur in llvm for a bpf test(which uses both linked_vars1.c and linked_vars2.c) in bpf-next. GCC gen object failure: $ /home/buildroot/bpf-next/tools/testing/selftests/bpf/tools/sbin/bpftool --debug gen object /home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/linked_vars.linked1.o /home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/linked_vars1.bpf.o /home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/linked_vars2.bpf.o libbpf: linker: adding object file '/home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/linked_vars1.bpf.o'... libbpf: linker: adding object file '/home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/linked_vars2.bpf.o'... libbpf: global 'input_data1': section mismatch 4 vs 5 Error: failed to link '/home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/linked_vars2.bpf.o': Invalid argument (22) In broken GCC linked_vars1.bpf.o BTF I see: [6900] VAR 'input_data1' type_id=8, linkage=global [7129] DATASEC '.data' size=0 vlen=2 type_id=7020 offset=0 size=4 (VAR 'input_data_weak') type_id=6900 offset=0 size=4 (VAR 'input_data1') In broken GCC linked_vars2.bpf.o BTF I see: [7068] VAR 'input_data1' type_id=8, linkage=extern [7126] DATASEC '.bss' size=0 vlen=8 type_id=7068 offset=0 size=4 (VAR 'input_data1') type_id=6921 offset=0 size=4 (VAR 'input_bss1') type_id=6912 offset=0 size=4 (VAR 'output_sink2') type_id=7092 offset=0 size=4 (VAR 'output_rodata2') type_id=7006 offset=0 size=4 (VAR 'output_data2') type_id=6899 offset=0 size=4 (VAR 'output_bss2') type_id=6919 offset=0 size=4 (VAR 'input_bss_weak') type_id=6979 offset=0 size=4 (VAR 'input_bss2') In working LLVM linked_vars1.bpf.o BTF I see: [8] VAR 'input_data1' type_id=4, linkage=global [36] DATASEC '.data' size=0 vlen=2 type_id=8 offset=0 size=4 (VAR 'input_data1') type_id=12 offset=0 size=4 (VAR 'input_data_weak') In working LLVM linked_vars2.bpf.o BTF I see: [31] VAR 'input_data1' type_id=4, linkage=extern In working LLVM linked_vars.linked1.o(output of gen object) BTF I see: [8] VAR 'input_data1' type_id=4, linkage=global [42] DATASEC '.data' size=16 vlen=3 type_id=8 offset=0 size=4 (VAR 'input_data1') type_id=12 offset=4 size=4 (VAR 'input_data_weak') type_id=32 offset=8 size=4 (VAR 'input_data2')
[Bug target/109256] New: Error: failed to link 'linked_maps2.bpf.o': Cannot allocate memory (12)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109256 Bug ID: 109256 Summary: Error: failed to link 'linked_maps2.bpf.o': Cannot allocate memory (12) Product: gcc Version: 13.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: target Assignee: unassigned at gcc dot gnu.org Reporter: james.hilliard1 at gmail dot com Target Milestone: --- I'm seeing this gen object error which does not occur in llvm for a bpf test(which uses both linked_maps1.c and linked_maps2.c) in bpf-next. It seems this is triggering a double free in libbpf, not entirely clear if this is a gcc issue or libbpf issue. GCC gen object failure: ==2125110== Command: /home/buildroot/bpf-next/tools/testing/selftests/bpf/tools/sbin/bpftool --debug gen object /home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/linked_maps.linked1.o /home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/linked_maps1.bpf.o /home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/linked_maps2.bpf.o ==2125110== libbpf: linker: adding object file '/home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/linked_maps1.bpf.o'... libbpf: linker: adding object file '/home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/linked_maps2.bpf.o'... Error: failed to link '/home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/linked_maps2.bpf.o': Cannot allocate memory (12) ==2125110== Invalid free() / delete / delete[] / realloc() ==2125110==at 0x484B0C4: free (vg_replace_malloc.c:884) ==2125110==by 0x17F8AB: bpf_linker__free (linker.c:204) ==2125110==by 0x12833C: do_object (gen.c:1608) ==2125110==by 0x12CDAB: cmd_select (main.c:206) ==2125110==by 0x129B53: do_gen (gen.c:2332) ==2125110==by 0x12CDAB: cmd_select (main.c:206) ==2125110==by 0x12DB9E: main (main.c:539) ==2125110== Address 0xda4b420 is 0 bytes after a block of size 0 free'd ==2125110==at 0x484B027: free (vg_replace_malloc.c:883) ==2125110==by 0x484D6F8: realloc (vg_replace_malloc.c:1451) ==2125110==by 0x181FA3: extend_sec (linker.c:1117) ==2125110==by 0x182326: linker_append_sec_data (linker.c:1201) ==2125110==by 0x1803DC: bpf_linker__add_file (linker.c:453) ==2125110==by 0x12829E: do_object (gen.c:1593) ==2125110==by 0x12CDAB: cmd_select (main.c:206) ==2125110==by 0x129B53: do_gen (gen.c:2332) ==2125110==by 0x12CDAB: cmd_select (main.c:206) ==2125110==by 0x12DB9E: main (main.c:539) ==2125110== Block was alloc'd at ==2125110==at 0x484876A: malloc (vg_replace_malloc.c:392) ==2125110==by 0x484D6EB: realloc (vg_replace_malloc.c:1451) ==2125110==by 0x181FA3: extend_sec (linker.c:1117) ==2125110==by 0x182326: linker_append_sec_data (linker.c:1201) ==2125110==by 0x1803DC: bpf_linker__add_file (linker.c:453) ==2125110==by 0x12829E: do_object (gen.c:1593) ==2125110==by 0x12CDAB: cmd_select (main.c:206) ==2125110==by 0x129B53: do_gen (gen.c:2332) ==2125110==by 0x12CDAB: cmd_select (main.c:206) ==2125110==by 0x12DB9E: main (main.c:539)
[Bug target/109256] Error: failed to link 'linked_maps2.bpf.o': Cannot allocate memory (12)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109256 --- Comment #2 from James Hilliard --- (In reply to Andrew Pinski from comment #1) > Even a bad input should cause an error reported rather than a double free. > So you should at least report it to libbpf too libbpf bug report: https://lore.kernel.org/bpf/cadvtj4o7zwuikkwntwfq0o_aax+46t_+ca9gvwmydwdrttg...@mail.gmail.com/
[Bug target/109256] Error: failed to link 'linked_maps2.bpf.o': Cannot allocate memory (12)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109256 James Hilliard changed: What|Removed |Added Resolution|--- |FIXED Status|UNCONFIRMED |RESOLVED --- Comment #3 from James Hilliard --- Fix has been merged upstream in bpf-next: https://lore.kernel.org/bpf/20230328004738.381898-3-eddy...@gmail.com/ https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git/commit/?id=d08ab82f59d55b0e5acfeb453081278dfc33f232
