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performance: 0.769
permissions: 0.735
graphic: 0.733
debug: 0.731
other: 0.729
KVM: 0.676
device: 0.617
PID: 0.606
network: 0.594
files: 0.592
boot: 0.572
semantic: 0.571
socket: 0.547
vnc: 0.518
qemu-system-aarch64 Segfaults
Description of problem:
Never finishes the script below always segfaults after a few hours
in seemingly random functions.
Steps to reproduce:
This is what i did with qemu version 8.2.1
inside test directory:
1. wget https://download.qemu.org/qemu-8.2.1.tar.xz
2. tar xvJf qemu-8.2.1.tar.xz
3. cd qemu-8.2.1
4. ./configure --target-list="aarch64-linux-user, aarch64-softmmu" --enable-slirp (crashes with and without --enable-debug)
5. make -j$(nproc)
6. ln -sf "$PWD/build/qemu-system-aarch64" "../qemu-system-aarch64"
7. cd ..
Now the VM
1. wget -O installer-linux https://deb.debian.org/debian/dists/bookworm/main/installer-arm64/current/images/netboot/debian-installer/arm64/linux
2. wget -O installer-initrd.gz https://deb.debian.org/debian/dists/bookworm/main/installer-arm64/current/images/netboot/debian-installer/arm64/initrd.gz
3. qemu-img create -f qcow2 hda.qcow2 15G
4. ./qemu-system-aarch64 -M virt -m 6G -cpu cortex-a72 \
-kernel installer-linux \
-initrd installer-initrd.gz \
-drive if=none,file=hda.qcow2,format=qcow2,id=hd \
-device virtio-blk-pci,drive=hd \
-netdev user,id=mynet \
-device virtio-net-pci,netdev=mynet \
-nographic -no-reboot \
-accel tcg,thread=multi \
-smp 8
5. Install minimal debian inside the VM
6. sudo virt-copy-out -a hda.qcow2 /boot/vmlinuz-6.1.0-17-arm64 /boot/initrd.img-6.1.0-17-arm64 .
7. ./qemu-system-aarch64 -M virt -m 6G -cpu cortex-a72 \
-kernel vmlinuz-6.1.0-17-arm64 \
-initrd initrd.img-6.1.0-17-arm64 \
-append 'root=/dev/vda2' \
-drive if=none,file=hda.qcow2,format=qcow2,id=hd \
-device virtio-blk-pci,drive=hd \
-netdev user,id=mynet,hostfwd=tcp::10022-:22 \
-device virtio-net-pci,netdev=mynet \
-nographic \
-accel tcg,thread=multi \
-smp 8
8. Now run this script inside some directory inside the VM(you might need to install gcc first)
#!/bin/bash
wget --no-clobber https://sourceware.org/pub/binutils/releases/binutils-2.41.tar.xz
wget --no-clobber https://ftp.gnu.org/gnu/mpfr/mpfr-4.2.0.tar.xz
wget --no-clobber https://ftp.gnu.org/gnu/gmp/gmp-6.3.0.tar.xz
wget --no-clobber https://ftp.gnu.org/gnu/mpc/mpc-1.3.1.tar.gz
wget --no-clobber https://ftp.gnu.org/gnu/gcc/gcc-13.2.0/gcc-13.2.0.tar.xz
BUG_TARGET="$(uname -m)-bug-linux-gnu"
tar -xf binutils-2.41.tar.xz
cd binutils-2.41
mkdir -vp build
cd build
../configure --prefix=$PWD \
--with-sysroot=$PWD \
--target=$BUG_TARGET \
--disable-nls \
--enable-gprofng=no \
--disable-werror \
--disable-gdb
make --jobs $(nproc)
cd ../..
rm -rf binutils
tar -xf gcc-13.2.0.tar.xz
cd gcc-13.2.0
tar -xf ../mpfr-4.2.0.tar.xz
tar -xf ../gmp-6.3.0.tar.xz
tar -xf ../mpc-1.3.1.tar.gz
mv mpfr-4.2.0 mpfr
mv gmp-6.3.0 gmp
mv mpc-1.3.1 mpc
mkdir -vp build
cd build
../configure --prefix=$PWD \
--with-sysroot=$PWD \
--target=$BUG_TARGET \
--with-glibc-version=2.38 \
--with-newlib \
--without-headers \
--enable-default-pie \
--enable-default-ssp \
--disable-nls \
--disable-shared \
--disable-multilib \
--disable-threads \
--disable-libatomic \
--disable-libgomp \
--disable-libquadmath \
--disable-libssp \
--disable-libvtv \
--disable-libstdcxx \
--enable-languages=c,c++
make --jobs $(nproc)
cd ../..
rm -rf gcc
Additional information:
I tried all the versions listed above, 6.2 usually segfaults in binutils while the other two run further.
Example:
```
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x000055555615dd37 in tlb_index (cpu=<Cannot access memory at address 0x7fffefffe1c8>,
mmu_idx=<Cannot access memory at address 0x7fffefffe1c0>,
addr=<Cannot access memory at address 0x7fffefffe1b8>)
at qemu-8.2.1/include/exec/cpu_ldst.h:367
367 uintptr_t size_mask = cpu->neg.tlb.f[mmu_idx].mask >> CPU_TLB_ENTRY_BITS;
[Current thread is 1 (LWP 857562)]
```
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