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Andrei VaginandgVisor bot
6a0edeac0f
Implement bluepill() without relying on a signal handler trampoline by directly switching stacks and execution contexts. Here, it is implemented just for x86_64. The arm64 part will be implemented separately. Here are benchmark results before and after this change: Before: BenchmarkWorldSwitchToUserRoundtrip-8 255940 4407 ns/op After: BenchmarkWorldSwitchToUserRoundtrip-8 307773 3765 ns/op Suggested-by: Jamie Liu <[email protected]> PiperOrigin-RevId: 664989586
22 lines
1.0 KiB
Go
22 lines
1.0 KiB
Go
// Copyright 2024 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 sigframe implements a mechanism to create a signal frame on the
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// stack and execute a user-defined callback function within that context. The
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// callback function can use the `sigreturn` system call to resuming the
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// current thread with the state from the signal frame. This functionality can
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// be helpful in scenarios where you need to simulate a signal handler-like
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// behavior without triggering a signal.
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package sigframe
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