mirror of
https://github.com/hanzoai/visor.git
synced 2026-09-24 17:04:14 +00:00
Jing Chen
ff3425ac1f
- runsc/debug.go: the SIGUSR2 stack dumper never exited its loop, so one signal pinned a core for the life of the shim. - proc/init_state.go: the start-failure path closed p.io unconditionally, but Init.Create leaves it nil for terminal containers. The nil deref killed the shim, and with it the pod. - proc/utils.go: getLastRuntimeError leaked the log file it opened, on every failed runsc command. - utils/volumes.go: configureShm wrote into a nil annotation map, which IsSandbox permits. - runsc/epoll.go: the cgroups v1 OOM watcher panicked on the first publish failure, which is normal under CRI-O. Reuse forward's leniency check; the panic under containerd is kept. - runsccmd/runsc.go: cmdOutput returned slices aliasing sync.Pool buffers that putBuf immediately recycled.
53 lines
1.3 KiB
Go
53 lines
1.3 KiB
Go
// Copyright 2021 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package runsc
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import (
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"os"
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"os/signal"
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"runtime"
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"sync"
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"syscall"
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"github.com/containerd/log"
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)
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var once sync.Once
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func setDebugSigHandler() {
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once.Do(func() {
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dumpCh := make(chan os.Signal, 1)
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signal.Notify(dumpCh, syscall.SIGUSR2)
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go func() {
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for range dumpCh {
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log.L.Debugf("User requested stack trace:\n%s", dumpStacks())
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}
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}()
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log.L.Debugf("For full process dump run: kill -%d %d", syscall.SIGUSR2, os.Getpid())
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})
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}
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// dumpStacks returns the stack traces of all goroutines.
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func dumpStacks() []byte {
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buf := make([]byte, 10240)
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for {
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n := runtime.Stack(buf, true)
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if n < len(buf) {
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return buf[:n]
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}
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buf = make([]byte, 2*len(buf))
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}
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}
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