Re: -pg problem on -current

On Mon, 8 Nov 2021, Thomas Klausner wrote:

> I'm trying to profile https://github.com/nih-at/ckmame/ on NetBSD 9.99.92/amd64.
>
> I do:
> pkgin in libzip
> git clone https://github.com/nih-at/ckmame.git
> cd ckmame
> mkdir build
> cd build
> CFLAGS=-pg CXXFLAGS=-pg cmake ..
> make
>
> The build breaks when a binary that is built is run to generate test data.
>
> # gdb src/ckmame
> GNU gdb (GDB) 11.0.50.20200914-git
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> Reading symbols from src/ckmame...
> (gdb) r
> Starting program: /home/wiz/Projects/nih/ckmame/a/ckmame/build/src/ckmame
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x0000000000495432 in dl_iterate_phdr ()
> (gdb) bt
> #0  0x0000000000495432 in dl_iterate_phdr ()
> #1  0x0000000000496da6 in __libc_static_tls_setup ()
> #2  0x0000000000586e47 in _libc_init ()
> #3  0x00007f7ff5e02d2d in _rtld_call_function_void (addr=5795328, obj=0x789df0963c00) at /disk/6/archive/foreign/src/libexec/ld.elf_so/rtld.h:514
> #4  _rtld_call_initfini_function (mask=0x7f7fff397980, func=5795328, obj=0x789df0963c00) at /disk/6/archive/foreign/src/libexec/ld.elf_so/rtld.c:143
> #5  _rtld_call_init_function (cur_objgen=<optimized out>, mask=<optimized out>, obj=<optimized out>)
>    at /disk/6/archive/foreign/src/libexec/ld.elf_so/rtld.c:258
> #6  _rtld_call_init_function (obj=0x789df0963c00, mask=0x7f7fff397980, cur_objgen=1) at /disk/6/archive/foreign/src/libexec/ld.elf_so/rtld.c:232
> #7  0x00007f7ff5e02fee in _rtld_call_init_functions (mask=mask@entry=0x7f7fff397980) at /disk/6/archive/foreign/src/libexec/ld.elf_so/rtld.c:316
> #8  0x00007f7ff5e03a21 in _rtld (sp=<optimized out>, relocbase=<optimized out>) at /disk/6/archive/foreign/src/libexec/ld.elf_so/rtld.c:784
> #9  0x00007f7ff5e00803 in rtld_start () from /usr/libexec/ld.elf_so
> #10 0x0000000000000000 in ?? ()
> (gdb)
>
>
> -pg still works for me on C programs and a minimal "int main()[]" c++
> program.  Am I doing something wrong here or is there a bug in the
> toolchain?
>
> Perhaps there are better ways to profile programs nowadays, let me
> know too.
> Thomas
>

See PR #56031

Profiling needs -static.

-RVP