[Bug gcov-profile/114115] xz-utils segfaults when built with -fprofile-generate (bad interaction between IFUNC and binding?)

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114115

--- Comment #13 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by H.J. Lu <h...@gcc.gnu.org>:

https://gcc.gnu.org/g:cab32bacaea268ec062b1fb4fc662d90c9d1cfce

commit r14-9775-gcab32bacaea268ec062b1fb4fc662d90c9d1cfce
Author: H.J. Lu <hjl.to...@gmail.com>
Date:   Mon Feb 26 08:38:58 2024 -0800

    tree-profile: Disable indirect call profiling for IFUNC resolvers

    We can't profile indirect calls to IFUNC resolvers nor their callees as
    it requires TLS which hasn't been set up yet when the dynamic linker is
    resolving IFUNC symbols.

    Add an IFUNC resolver caller marker to cgraph_node and set it if the
    function is called by an IFUNC resolver.  Disable indirect call profiling
    for IFUNC resolvers and their callees.

    Tested with profiledbootstrap on Fedora 39/x86-64.

    gcc/ChangeLog:

            PR tree-optimization/114115
            * cgraph.h (symtab_node): Add check_ifunc_callee_symtab_nodes.
            (cgraph_node): Add called_by_ifunc_resolver.
            * cgraphunit.cc (symbol_table::compile): Call
            symtab_node::check_ifunc_callee_symtab_nodes.
            * symtab.cc (check_ifunc_resolver): New.
            (ifunc_ref_map): Likewise.
            (is_caller_ifunc_resolver): Likewise.
            (symtab_node::check_ifunc_callee_symtab_nodes): Likewise.
            * tree-profile.cc (gimple_gen_ic_func_profiler): Disable indirect
            call profiling for IFUNC resolvers and their callees.

    gcc/testsuite/ChangeLog:

            PR tree-optimization/114115
            * gcc.dg/pr114115.c: New test.