NetBSD Problem Report #58784

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Date: Tue, 29 Oct 2024 00:26:54 +0000 (UTC)
From: furkanonder@protonmail.com
Reply-To: furkanonder@protonmail.com
To: gnats-bugs@NetBSD.org
Subject: gcc -pg with pthread causes segmentation fault
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>Number:         58784
>Category:       port-amd64
>Synopsis:       gcc -pg with pthread causes segmentation fault
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    port-amd64-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Oct 29 00:30:00 +0000 2024
>Last-Modified:  Tue Oct 29 00:35:00 +0000 2024
>Originator:     Furkan Onder
>Release:        NetBSD 10.0
>Organization:
>Environment:
NetBSD home.localhost 10.0 NetBSD 10.0 (GENERIC) #0: Thu Mar 28 08:33:33 UTC 2024  mkrepro@mkrepro.NetBSD.org:/usr/src/sys/arch/amd64/compile/GENERIC amd64
>Description:
I am experiencing segmentation faults on NetBSD when using the -pg flag with GCC in conjunction with pthreads, specifically when configuring CPython with --enable-profiling.

You can find the related issue for CPython here(https://github.com/python/cpython/issues/126099)
>How-To-Repeat:
Small Example to Reproduce:

&#10140;  ~ cat test.c
#include <pthread.h>
#include <stdio.h>

void* run(void* arg) {
    printf("Thread %ld is running.\n", (long)arg);
    return NULL;
}

int main(void) {
    for (long i = 0; i < 8; i++) {
        pthread_t tid;
        pthread_create(&tid, NULL, run, (void*)i);
        pthread_detach(tid);
    }
    pthread_exit(NULL);
}

&#10140;  ~ gcc -pg test.c -o test -lpthread
&#10140;  ~ ./test
[1]    13114 segmentation fault (core dumped)  ./test

To Reproduce in CPython:
&#10140;  ~ ./configure --with-pydebug --enable-profiling --disable-ipv6 && make

&#10140;  ~ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/libexec/lto-wrapper
Target: x86_64--netbsd
Configured with: /usr/src/tools/gcc/../../external/gpl3/gcc/dist/configure --target=x86_64--netbsd --enable-long-long --enable-threads --with-bugurl=http://www.NetBSD.org/support/send-pr.html --with-pkgversion='NetBSD nb2 20230710' --with-system-zlib --without-isl --enable-__cxa_atexit --enable-libstdcxx-time=rt --enable-libstdcxx-threads --with-diagnostics-color=auto-if-env --with-tune=nocona --with-default-libstdcxx-abi=new --with-mpc-lib=/var/obj/mknative/amd64-x86_64/usr/src/external/lgpl3/mpc/lib/libmpc --with-mpfr-lib=/var/obj/mknative/amd64-x86_64/usr/src/external/lgpl3/mpfr/lib/libmpfr --with-gmp-lib=/var/obj/mknative/amd64-x86_64/usr/src/external/lgpl3/gmp/lib/libgmp --with-mpc-include=/usr/src/external/lgpl3/mpc/dist/src --with-mpfr-include=/usr/src/external/lgpl3/mpfr/dist/src --with-gmp-include=/usr/src/external/lgpl3/gmp/lib/libgmp/arch/x86_64 --enable-tls --disable-multilib --disable-libstdcxx-pch --build=x86_64--netbsd --host=x86_64--netbsd --with-sysroot=/var/obj/mkna
 tive/amd64-x86_64/usr/src/destdir.amd64
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 10.5.0 (nb3 20231008)
>Fix:
-

>Audit-Trail:
From: Christos Zoulas <christos@zoulas.com>
To: gnats-bugs@netbsd.org
Cc: port-amd64-maintainer@netbsd.org,
 gnats-admin@netbsd.org,
 netbsd-bugs@netbsd.org
Subject: Re: port-amd64/58784: gcc -pg with pthread causes segmentation fault
Date: Mon, 28 Oct 2024 20:32:30 -0400

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 Use -static

 christos


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