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// 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/win/cpu_context_win.h"
#include <windows.h>
#include <iterator>
#include "build/build_config.h"
#include "gtest/gtest.h"
#include "snapshot/cpu_context.h"
#include "test/hex_string.h"
namespace crashpad {
namespace test {
namespace {
template <typename T>
void TestInitializeX86Context() {
T context = {0};
context.ContextFlags = WOW64_CONTEXT_INTEGER |
WOW64_CONTEXT_DEBUG_REGISTERS |
WOW64_CONTEXT_EXTENDED_REGISTERS;
context.Eax = 1;
context.Dr0 = 3;
context.ExtendedRegisters[4] = 2; // FTW
// Test the simple case, where everything in the CPUContextX86 argument is set
// directly from the supplied thread, float, and debug state parameters.
{
CPUContextX86 cpu_context_x86 = {};
InitializeX86Context(&context, &cpu_context_x86);
EXPECT_EQ(cpu_context_x86.eax, 1u);
EXPECT_EQ(cpu_context_x86.fxsave.ftw, 2u);
EXPECT_EQ(cpu_context_x86.dr0, 3u);
}
}
template <typename T>
void TestInitializeX86Context_FsaveWithoutFxsave() {
T context = {0};
context.ContextFlags = WOW64_CONTEXT_INTEGER |
WOW64_CONTEXT_FLOATING_POINT |
WOW64_CONTEXT_DEBUG_REGISTERS;
context.Eax = 1;
// In fields that are wider than they need to be, set the high bits to ensure
// that they’re masked off appropriately in the output.
context.FloatSave.ControlWord = 0xffff027f;
context.FloatSave.StatusWord = 0xffff0004;
context.FloatSave.TagWord = 0xffffa9ff;
context.FloatSave.ErrorOffset = 0x01234567;
context.FloatSave.ErrorSelector = 0x0bad0003;
context.FloatSave.DataOffset = 0x89abcdef;
context.FloatSave.DataSelector = 0xffff0007;
context.FloatSave.RegisterArea[77] = 0x80;
context.FloatSave.RegisterArea[78] = 0xff;
context.FloatSave.RegisterArea[79] = 0x7f;
context.Dr0 = 3;
{
CPUContextX86 cpu_context_x86 = {};
InitializeX86Context(&context, &cpu_context_x86);
EXPECT_EQ(cpu_context_x86.eax, 1u);
EXPECT_EQ(cpu_context_x86.fxsave.fcw, 0x027f);
EXPECT_EQ(cpu_context_x86.fxsave.fsw, 0x0004);
EXPECT_EQ(cpu_context_x86.fxsave.ftw, 0x00f0);
EXPECT_EQ(cpu_context_x86.fxsave.fop, 0x0bad);
EXPECT_EQ(cpu_context_x86.fxsave.fpu_ip, 0x01234567u);
EXPECT_EQ(cpu_context_x86.fxsave.fpu_cs, 0x0003);
EXPECT_EQ(cpu_context_x86.fxsave.fpu_dp, 0x89abcdefu);
EXPECT_EQ(cpu_context_x86.fxsave.fpu_ds, 0x0007);
for (size_t st_mm = 0; st_mm < 7; ++st_mm) {
EXPECT_EQ(
BytesToHexString(cpu_context_x86.fxsave.st_mm[st_mm].st,
std::size(cpu_context_x86.fxsave.st_mm[st_mm].st)),
std::string(std::size(cpu_context_x86.fxsave.st_mm[st_mm].st) * 2,
'0'))
<< "st_mm " << st_mm;
}
EXPECT_EQ(BytesToHexString(cpu_context_x86.fxsave.st_mm[7].st,
std::size(cpu_context_x86.fxsave.st_mm[7].st)),
"0000000000000080ff7f");
EXPECT_EQ(cpu_context_x86.dr0, 3u);
}
}
#if defined(ARCH_CPU_X86_FAMILY)
#if defined(ARCH_CPU_X86_64)
TEST(CPUContextWin, InitializeX64Context) {
CONTEXT context = {0};
context.Rax = 10;
context.FltSave.TagWord = 11;
context.Dr0 = 12;
context.ContextFlags =
CONTEXT_INTEGER | CONTEXT_FLOATING_POINT | CONTEXT_DEBUG_REGISTERS;
// Test the simple case, where everything in the CPUContextX86_64 argument is
// set directly from the supplied thread, float, and debug state parameters.
{
CPUContextX86_64 cpu_context_x86_64 = {};
InitializeX64Context(&context, &cpu_context_x86_64);
EXPECT_EQ(cpu_context_x86_64.rax, 10u);
EXPECT_EQ(cpu_context_x86_64.fxsave.ftw, 11u);
EXPECT_EQ(cpu_context_x86_64.dr0, 12u);
}
}
#endif // ARCH_CPU_X86_64
TEST(CPUContextWin, InitializeX86Context) {
#if defined(ARCH_CPU_X86)
TestInitializeX86Context<CONTEXT>();
#else // ARCH_CPU_X86
TestInitializeX86Context<WOW64_CONTEXT>();
#endif // ARCH_CPU_X86
}
TEST(CPUContextWin, InitializeX86Context_FsaveWithoutFxsave) {
#if defined(ARCH_CPU_X86)
TestInitializeX86Context_FsaveWithoutFxsave<CONTEXT>();
#else // ARCH_CPU_X86
TestInitializeX86Context_FsaveWithoutFxsave<WOW64_CONTEXT>();
#endif // ARCH_CPU_X86
}
#endif // ARCH_CPU_X86_FAMILY
} // namespace
} // namespace test
} // namespace crashpad