add gitlab issues in toml format

1 files changed, 185 insertions, 0 deletions

diff --git a/gitlab/issues/target_missing/host_missing/accel_TCG/2634.toml b/gitlab/issues/target_missing/host_missing/accel_TCG/2634.toml
new file mode 100644
index 000000000..5899bd8d2
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+++ b/gitlab/issues/target_missing/host_missing/accel_TCG/2634.toml
@@ -0,0 +1,185 @@
+id = 2634
+title = "Replay/record does not work with `rrsnapshot`/`loadvm`"
+state = "opened"
+created_at = "2024-10-21T13:18:30.992Z"
+closed_at = "n/a"
+labels = ["accel: TCG", "icount"]
+url = "https://gitlab.com/qemu-project/qemu/-/issues/2634"
+host-os = "Ubuntu 20.04.6 LTS"
+host-arch = "x86_64"
+qemu-version = "9.1.0"
+guest-os = "alpine-standard-3.20.3-x86_64.iso"
+guest-arch = "x86_64"
+description = """Qemu's record/replay feature does not properly work when using snapshots (like rrsnapshot).
+
+Record/replay without snapshotting works just fine, but when using `rrsnapshot=...` the replay is stuck at boot. `loadvm` monitor command also gets qemu stuck.
+
+Record command:
+
+```
+$ qemu-system-x86_64 \\
+  -cpu SandyBridge -smp 1 \\
+  -serial stdio -display none \\
+  -m 4096 \\
+  -drive file=./empty.qcow2,id=rr \\
+  -kernel ./boot/vmlinuz-lts \\
+  -initrd ./boot/initramfs-lts  .
+  -monitor telnet::12345,server,nowait \\
+  -append "console=ttyS0 root=/dev/ram0 alpine_dev=cdrom:iso9660 modules=loop,squashfs,sd-mod,usb-storage quiet" \\
+  -icount shift=auto,rrfile=rr,rr=record,rrsnapshot=init
+```
+
+Broken replay command, which gets qemu stuck:
+
+```
+$ qemu-system-x86_64 \\
+  -cpu SandyBridge -smp 1 \\
+  -serial stdio -display none \\
+  -m 4096 \\
+  -drive file=./empty.qcow2,id=rr \\
+  -kernel ./boot/vmlinuz-lts \\
+  -initrd ./boot/initramfs-lts  .
+  -monitor telnet::12345,server,nowait \\
+  -append "console=ttyS0 root=/dev/ram0 alpine_dev=cdrom:iso9660 modules=loop,squashfs,sd-mod,usb-storage quiet" \\
+  -icount shift=auto,rrfile=rr,rr=replay,rrsnapshot=init
+
+qemu-system-x86_64: warning: TCG doesn't support requested feature: CPUID.01H:ECX.tsc-deadline [bit 24]
+```
+
+Record/replay without `rrsnapshot`/`loadvm`/etc works as expected."""
+reproduce = """To reproduce i've used alpine linux kernel as the guest:
+
+```
+wget https://dl-cdn.alpinelinux.org/alpine/v3.20/releases/x86_64/alpine-standard-3.20.3-x86_64.iso
+7z x alpine-standard-3.20.3-x86_64.iso
+```
+
+Prerequisites - an empty qcow2 file for snapshots:
+
+```
+qemu-img create -f qcow2 empty.qcow2 1G
+```
+
+Running an alpine linux kernel with `rr=record` - works just fine, kernel boots, accepts input.
+
+```
+$ qemu-system-x86_64 \\
+  -cpu SandyBridge -smp 1 \\
+  -serial stdio -display none \\
+  -m 4096 \\
+  -drive file=./empty.qcow2,id=rr \\
+  -kernel ./boot/vmlinuz-lts \\
+  -initrd ./boot/initramfs-lts  .
+  -monitor telnet::12345,server,nowait \\
+  -append "console=ttyS0 root=/dev/ram0 alpine_dev=cdrom:iso9660 modules=loop,squashfs,sd-mod,usb-storage quiet" \\
+  -icount shift=auto,rrfile=rr,rr=record,rrsnapshot=init
+
+qemu-system-x86_64: warning: TCG doesn't support requested feature: CPUID.01H:ECX.tsc-deadline [bit 24]
+mount: mounting /dev/ram0 on /sysroot failed: Invalid argument
+Mounting root failed. 
+initramfs emergency recovery shell launched. Type 'exit' to continue boot
+sh: can't access tty; job control turned off
+~ # ls -alh
+total 32K    
+drwx------   18 root     root           0 Oct 21 13:02 .
+drwx------   18 root     root           0 Oct 21 13:02 ..
+-rw-------    1 root     root           8 Oct 21 13:02 .ash_history
+drwxr-xr-x    2 root     root           0 Jun 18 12:44 .modloop
+drwxr-xr-x    2 root     root           0 Oct 21 13:02 bin
+drwxr-xr-x    9 root     root        2.5K Oct 21 13:02 dev
+drwxr-xr-x    4 root     root           0 Oct 21 13:02 etc
+-rwxr-xr-x    1 root     root       25.9K Jun 18 12:44 init
+drwxr-xr-x    5 root     root           0 Jun 18 12:44 lib
+drwxr-xr-x    5 root     root           0 Jun 18 12:44 media
+drwxr-xr-x    2 root     root           0 Jun 18 12:44 newroot
+dr-xr-xr-x  114 root     root           0 Oct 21 13:02 proc
+drwx------    2 root     root           0 Sep  4 12:53 root
+drwxr-xr-x    3 root     root           0 Oct 21 13:02 run
+drwxr-xr-x    2 root     root           0 Oct 21 13:02 sbin
+dr-xr-xr-x   13 root     root           0 Oct 21 13:02 sys
+drwxr-xr-x    2 root     root           0 Oct 21 13:02 sysroot
+drwxr-xr-x    2 root     root           0 Oct 21 13:02 tmp
+drwxr-xr-x    5 root     root           0 Oct 21 13:02 usr
+drwxr-xr-x    3 root     root           0 Jun 18 12:44 var
+~ # echo "AAAAAAAA?"
+AAAAAAAA?
+~ # 
+```
+
+`rr`-file is produced, which can be used for replaying **without** `rrsnapshot`-option:
+
+```
+$ qemu-system-x86_64 \\
+  -cpu SandyBridge -smp 1 \\
+  -serial stdio -display none \\
+  -m 4096 \\
+  -drive file=./empty.qcow2,id=rr \\
+  -kernel ./boot/vmlinuz-lts \\
+  -initrd ./boot/initramfs-lts  .
+  -monitor telnet::12345,server,nowait \\
+  -append "console=ttyS0 root=/dev/ram0 alpine_dev=cdrom:iso9660 modules=loop,squashfs,sd-mod,usb-storage quiet" \\
+  -icount shift=auto,rrfile=rr,rr=replay
+
+qemu-system-x86_64: warning: TCG doesn't support requested feature: CPUID.01H:ECX.tsc-deadline [bit 24]
+mount: mounting /dev/ram0 on /sysroot failed: Invalid argument
+Mounting root failed. 
+initramfs emergency recovery shell launched. Type 'exit' to continue boot
+sh: can't access tty; job control turned off
+~ # ls -alh
+total 32K    
+drwx------   18 root     root           0 Oct 21 13:02 .
+drwx------   18 root     root           0 Oct 21 13:02 ..
+-rw-------    1 root     root           8 Oct 21 13:02 .ash_history
+drwxr-xr-x    2 root     root           0 Jun 18 12:44 .modloop
+drwxr-xr-x    2 root     root           0 Oct 21 13:02 bin
+drwxr-xr-x    9 root     root        2.5K Oct 21 13:02 dev
+drwxr-xr-x    4 root     root           0 Oct 21 13:02 etc
+-rwxr-xr-x    1 root     root       25.9K Jun 18 12:44 init
+drwxr-xr-x    5 root     root           0 Jun 18 12:44 lib
+drwxr-xr-x    5 root     root           0 Jun 18 12:44 media
+drwxr-xr-x    2 root     root           0 Jun 18 12:44 newroot
+dr-xr-xr-x  114 root     root           0 Oct 21 13:02 proc
+drwx------    2 root     root           0 Sep  4 12:53 root
+drwxr-xr-x    3 root     root           0 Oct 21 13:02 run
+drwxr-xr-x    2 root     root           0 Oct 21 13:02 sbin
+dr-xr-xr-x   13 root     root           0 Oct 21 13:02 sys
+drwxr-xr-x    2 root     root           0 Oct 21 13:02 sysroot
+drwxr-xr-x    2 root     root           0 Oct 21 13:02 tmp
+drwxr-xr-x    5 root     root           0 Oct 21 13:02 usr
+drwxr-xr-x    3 root     root           0 Jun 18 12:44 var
+~ # echo "AAAAAAAA?"
+AAAAAAAA?
+~ # 
+```
+
+As you can see, replaying emulation session works as expected. How ever, if I add the `rrsnapshot`-option, it gets stuck:
+
+```
+$ qemu-system-x86_64 \\
+  -cpu SandyBridge -smp 1 \\
+  -serial stdio -display none \\
+  -m 4096 \\
+  -drive file=./empty.qcow2,id=rr \\
+  -kernel ./boot/vmlinuz-lts \\
+  -initrd ./boot/initramfs-lts  .
+  -monitor telnet::12345,server,nowait \\
+  -append "console=ttyS0 root=/dev/ram0 alpine_dev=cdrom:iso9660 modules=loop,squashfs,sd-mod,usb-storage quiet" \\
+  -icount shift=auto,rrfile=rr,rr=replay,rrsnapshot=init
+
+qemu-system-x86_64: warning: TCG doesn't support requested feature: CPUID.01H:ECX.tsc-deadline [bit 24] 
+```
+
+This also can be reproduced without `rrsnapshot` option, by issuing `loadvm init` from qemu monitor:
+
+```
+$ telnet localhost 12345
+qemu> loadvm init
+...
+```
+
+Or, by using `gdb` and issuing reverse-commands that require `loadvm` to load previous state, like `reverse-stepi` or `reverse-continue`.
+
+Attaching a debugger & using debug-prints shows some thread being stuck in the [`rcu.c`](https://gitlab.com/qemu-project/qemu/-/blob/master/util/rcu.c), near the `qemu_event_wait(&rcu_call_ready_event);`. I've tried to wait for quite some time (about an hour) and there was no result."""
+additional = """**Qemu build.** Qemu binary built from sources of 9.1.0 with `--target-list=x86_64-softmmu`.
+
+**Host machine.** An almost clean Ubuntu 20.04 with necessary packages for building qemu from the latest release sources."""