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https://github.com/hanzoai/visor.git
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Etienne PerotandgVisor bot
da6948a692
This will be used to plumb the syscall number through to a counter metric that exports the number of times an unimplemented syscall has been called. Plenty of syscall implementations call `EmitUnimplementedEvent` for flags and settings that are not implemented. With `sysno` available, they will be able to plumb that bit of information through. PiperOrigin-RevId: 518635831
45 lines
1.5 KiB
Go
45 lines
1.5 KiB
Go
// Copyright 2023 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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// http://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 linux
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import (
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"gvisor.dev/gvisor/pkg/atomicbitops"
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"gvisor.dev/gvisor/pkg/errors/linuxerr"
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"gvisor.dev/gvisor/pkg/log"
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"gvisor.dev/gvisor/pkg/sentry/arch"
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"gvisor.dev/gvisor/pkg/sentry/kernel"
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)
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var afsSyscallPanic = atomicbitops.Bool{}
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// SetAFSSyscallPanic sets the panic behaviour of afs_syscall.
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// Should only be called based on the config value of TESTONLY-afs-syscall-panic.
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func SetAFSSyscallPanic(v bool) {
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if v {
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log.Warningf("AFSSyscallPanic is set. User workloads may trigger sentry panics.")
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}
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afsSyscallPanic.Store(v)
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}
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// AFSSyscall is a gVisor specific implementation of afs_syscall:
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// - if TESTONLY-afs-syscall-panic flag is set it triggers a panic.
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func AFSSyscall(t *kernel.Task, sysno uintptr, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) {
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if afsSyscallPanic.Load() {
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panic("User workload triggered a panic via afs_syscall. This panic is intentional.")
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}
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return 0, nil, linuxerr.ENOSYS
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}
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