chromium/third_party/crashpad/crashpad/snapshot/cpu_context_test.cc

// Copyright 2014 The Crashpad 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.

#include "snapshot/cpu_context.h"

#include <stddef.h>
#include <string.h>
#include <sys/types.h>

#include <iterator>

#include "gtest/gtest.h"
#include "test/hex_string.h"

namespace crashpad {
namespace test {
namespace {

enum ExponentValue { … };

enum FractionValue { … };

//! \brief Initializes an x87 register to a known bit pattern.
//!
//! \param[out] st_mm The x87 register to initialize. The reserved portion of
//!     the register is always zeroed out.
//! \param[in] exponent_value The bit pattern to use for the exponent. If this
//!     is kExponentAllZero, the sign bit will be set to `1`, and if this is
//!     kExponentAllOne, the sign bit will be set to `0`. This tests that the
//!     implementation doesn’t erroneously consider the sign bit to be part of
//!     the exponent. This may also be kExponentNormal, indicating that the
//!     exponent shall neither be all zeroes nor all ones.
//! \param[in] j_bit The value to use for the “J bit” (“integer bit”).
//! \param[in] fraction_value If kFractionAllZero, the fraction will be zeroed
//!     out. If kFractionNormal, the fraction will not be all zeroes.
void SetX87Register(CPUContextX86::X87Register* st,
                    ExponentValue exponent_value,
                    bool j_bit,
                    FractionValue fraction_value) { … }

//! \brief Initializes an x87 register to a known bit pattern.
//!
//! This behaves as SetX87Register() but also clears the reserved portion of the
//! field as used in the `fxsave` format.
void SetX87OrMMXRegister(CPUContextX86::X87OrMMXRegister* st_mm,
                         ExponentValue exponent_value,
                         bool j_bit,
                         FractionValue fraction_value) { … }

TEST(CPUContextX86, FxsaveToFsave) { … }

TEST(CPUContextX86, FsaveToFxsave) { … }

TEST(CPUContextX86, FxsaveToFsaveTagWord) { … }

TEST(CPUContextX86, FsaveToFxsaveTagWord) { … }

}  // namespace
}  // namespace test
}  // namespace crashpad