mirror of
https://github.com/google/sandboxed-api.git
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129 lines
3.1 KiB
C++
129 lines
3.1 KiB
C++
// Copyright 2020 Google LLC
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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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#ifndef SANDBOXED_API_CONFIG_H_
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#define SANDBOXED_API_CONFIG_H_
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#include <cstdint>
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#include "absl/base/config.h"
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// GCC/Clang define __x86_64__, Visual Studio uses _M_X64
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#if defined(__x86_64__) || defined(_M_X64)
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#define SAPI_X86_64 1
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// Check various spellings for 64-bit POWER. Not checking for Visual Studio, as
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// it does not support 64-bit POWER.
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#elif (defined(__PPC64__) || defined(__powerpc64__) || defined(__ppc64__)) && \
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defined(ABSL_IS_LITTLE_ENDIAN)
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#define SAPI_PPC64_LE 1
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// Spellings for AArch64
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#elif defined(__aarch64__) || defined(_M_ARM64)
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#define SAPI_ARM64 1
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// 32-bit ARM
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#elif defined(__arm__) || defined(_M_ARM)
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#define SAPI_ARM 1
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#endif
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namespace sapi {
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namespace cpu {
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// CPU architectures known to Sandbox2
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enum Architecture : uint16_t {
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// Linux: Use a magic value, so it can be easily spotted in the seccomp-bpf
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// bytecode decompilation stream. Must be < (1<<15), as/ that's the size of
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// data which can be returned by BPF.
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kUnknown = 0xCAF0,
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kX8664,
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kX86,
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kPPC64LE,
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kArm64,
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kArm,
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};
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} // namespace cpu
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namespace host_cpu {
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// Returns the current host CPU architecture if supported. If not supported,
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// returns cpu::kUnknown.
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constexpr cpu::Architecture Architecture() {
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#if defined(SAPI_X86_64)
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return cpu::kX8664;
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#elif defined(SAPI_PPC64_LE)
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return cpu::kPPC64LE;
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#elif defined(SAPI_ARM64)
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return cpu::kArm64;
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#elif defined(SAPI_ARM)
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return cpu::kArm;
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#else
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return cpu::kUnknown;
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#endif
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}
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constexpr bool IsX8664() { return Architecture() == cpu::kX8664; }
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constexpr bool IsPPC64LE() { return Architecture() == cpu::kPPC64LE; }
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constexpr bool IsArm64() { return Architecture() == cpu::kArm64; }
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constexpr bool IsArm() { return Architecture() == cpu::kArm; }
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constexpr bool Is64Bit() { return sizeof(uintptr_t) == 8; }
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} // namespace host_cpu
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static_assert(host_cpu::Architecture() != cpu::kUnknown,
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"Host CPU architecture is not supported: One of x86-64, POWER64 "
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"(little endian), ARM or AArch64 is required.");
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namespace sanitizers {
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constexpr bool IsMSan() {
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#ifdef ABSL_HAVE_MEMORY_SANITIZER
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return true;
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#else
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return false;
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#endif
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}
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constexpr bool IsTSan() {
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#ifdef ABSL_HAVE_THREAD_SANITIZER
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return true;
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#else
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return false;
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#endif
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}
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constexpr bool IsASan() {
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#ifdef ABSL_HAVE_ADDRESS_SANITIZER
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return true;
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#else
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return false;
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#endif
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}
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// Returns whether any of the sanitizers is enabled.
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constexpr bool IsAny() { return IsMSan() || IsTSan() || IsASan(); }
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} // namespace sanitizers
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} // namespace sapi
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#endif // SANDBOXED_API_CONFIG_H_
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