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// Copyright 2020 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef GVISOR_TEST_UTIL_PLATFORM_UTIL_H_
#define GVISOR_TEST_UTIL_PLATFORM_UTIL_H_
namespace gvisor {
namespace testing {
// PlatformSupport is a generic enumeration of classes of support.
//
// It is up to the individual functions and callers to agree on the precise
// definition for each case. The document here generally refers to 32-bit
// as an example. Many cases will use only NotSupported and Allowed.
enum class PlatformSupport {
// The feature is not supported on the current platform.
//
// In the case of 32-bit, this means that calls will generally be interpreted
// as 64-bit calls, and there is no support for 32-bit binaries, long calls,
// etc. This usually means that the underlying implementation just pretends
// that 32-bit doesn't exist.
NotSupported,
// Calls will be ignored by the kernel with a fixed error.
Ignored,
// Calls will result in a SIGSEGV or similar fault.
Segfault,
// The feature is supported as expected.
//
// In the case of 32-bit, this means that the system call or far call will be
// handled properly.
Allowed,
};
PlatformSupport PlatformSupport32Bit();
PlatformSupport PlatformSupportAlignmentCheck();
PlatformSupport PlatformSupportMultiProcess();
PlatformSupport PlatformSupportInt3();
} // namespace testing
} // namespace gvisor
#endif // GVISOR_TEST_UTIL_PLATFORM_UTL_H_
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