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Rongsong Shen
b406dd762a
sched_worker_change() aliased w->host.resvals_to_sched to a local xlist_t's backing array, pushed it to the scheduler, then freed that array via xlist_fini() without resetting the alias - leaving a dangling pointer for the rest of the worker's life. On disconnect (handle_worker_leave -> mark_worker_unavail -> persist_worker_hook_fun -> capnp_encode_worker -> encode_Worker -> encode_NameValue_list), this dereferenced freed memory and crashed the controller - but only once a scheduler had ever connected (on_scheduler_join gates the hook registration), which made it easy to miss in isolated worker-only testing. The correct reset already existed in the function but was dead-code'd behind #if 0 /*FIXME*/ - apparently from a prior fix attempt that got wrapped instead of landed. Fix mirrors the proven-correct pattern already used by the sibling apiserver_worker_change(): null the alias before xlist_fini() frees the backing array, rather than double-freeing via free_name_val_list() first. Adds test_sched_worker_change.c, a regression test driving the real production hook-dispatch path (xce_run_hooks -> sched_worker_hook_fun -> sched_worker_dead -> sched_worker_change) and the real encode_Worker() encoder the original crash traversed - confirmed to reproduce the exact ASAN heap-use-after-free when the fix is reverted, and pass clean when restored, closing the gap that let this regress silently once already. Found while live-testing the resource-value-verification feature (deploying a scheduler + injecting worker resource values via xce_test, then disconnecting) - unrelated to that feature's own changes. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> |
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| .claude | ||
| .kiro | ||
| .wolf | ||
| docs/superpowers/plans | ||
| raft | ||
| reports | ||
| scripts | ||
| src | ||
| .clang-format | ||
| .gitignore | ||
| .mcp.json | ||
| .opencode.json | ||
| CLAUDE.md | ||
| README.md | ||
1. commit 规则
- 每个人 fork 自己的 branch， 从自己的 branch 做 PR，review 完再 commit
2. code format
2.1. C
推荐使用 clang-format，公共配置放在源码里面 xce/.clang-format
（理论上直接使用源码里面 xce/.clang-format 文件格式不会变）
2.1.1. vscode 可以在配置中加上如下内容
"C_Cpp.clang_format_style": "WebKit",
"C_Cpp.clang_format_fallbackStyle": "WebKit",
2.1.2. vim & emacs
clang-format -style="{BasedOnStyle: webkit}" -i XX.c
2.2. golang
使用默认 gofmt
3. build environment and build (example of ubuntu)
3.1 build environment
- Install nix package management tool
sh <(curl -L https://nixos.org/nix/install) --daemon
- Edit /etc/nix/nix.conf to make sure
experimental-features = nix-command flakes
sandbox = true
sandbox-fallback = false
substituters = https://mirrors.ustc.edu.cn/nix-channels/store https://cache.nixos.org https://cache.nixos.org/
trusted-users = root <your account>
make sure that you have restarted nix-daemon service after you have changed /etc/nix/nix.conf
- Install socat and config ssh (for clone by ssh protocol)
nix profile add nixpkgs#socat
.ssh/config
Host gitea.shenrs.eu
HostName gitea.shenrs.eu
IdentityFile ~/.ssh/id_ed25519
ProxyCommand socat - openssl-connect:gitea.shenrs.eu:2022,snihost=gitea.shenrs.eu,verify=0
3.2 checkout source code
3.3 build (for package and release)
cd xce/src
# for build debug version
nix build --option sandbox false .#xcecore_debug
# for normal build
nix build --option sandbox false .#xcecore
You can find the generated binaries at =result= directory
3.4 build (for daily develop)
cd xce/src
nix develop
# using meson to generated build configuration (debug and address sanitize)
meson setup build --buildtype=debug -Db_sanitize=address
# run meson to build
meson compile -C build
# The generated files will be in build/
3.5 build AppImage package
cd xce/src
nix bundle --bundler github:ralismark/nix-appimage --option sandbox false .#xce
This will create all in one AppImage file which contains everything for package delivery.
4. misc
4.1. Windows remap ctrl and alt key
create a reg file, e.g. remapkey.reg
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Keyboard Layout]
"Scancode Map"=hex:00,00,00,00,00,00,00,00,05,00,00,00,38,00,1d,00,1d,00,38,00,38,e0,1d,e0,1d,e0,38,e0,00,00,00,00
then double click remapkey.reg to import it. Restart OS.