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// Copyright 2014 The Crashpad Authors. All rights reserved.
//
// 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 "minidump/minidump_context_writer.h"
#include <stdint.h>
#include <string>
#include <type_traits>
#include "base/notreached.h"
#include "gtest/gtest.h"
#include "minidump/minidump_context.h"
#include "minidump/test/minidump_context_test_util.h"
#include "minidump/test/minidump_writable_test_util.h"
#include "snapshot/cpu_context.h"
#include "snapshot/test/test_cpu_context.h"
#include "util/file/string_file.h"
namespace crashpad {
namespace test {
namespace {
template <typename Writer, typename Context, typename RVAType>
void EmptyContextTest(void (*expect_context)(uint32_t, const Context*, bool)) {
Writer context_writer;
StringFile string_file;
EXPECT_TRUE(context_writer.WriteEverything(&string_file));
ASSERT_EQ(string_file.string().size(), sizeof(Context));
const Context* observed =
MinidumpWritableAtRVA<Context>(string_file.string(), RVAType(0));
ASSERT_TRUE(observed);
expect_context(0, observed, false);
}
class TestTypeNames {
public:
template <typename T>
static std::string GetName(int) {
if (std::is_same<T, RVA>()) {
return "RVA";
}
if (std::is_same<T, RVA64>()) {
return "RVA64";
}
NOTREACHED();
return "";
}
};
template <typename RVAType>
class MinidumpContextWriter : public ::testing::Test {};
using RVATypes = ::testing::Types<RVA, RVA64>;
TYPED_TEST_SUITE(MinidumpContextWriter, RVATypes, TestTypeNames);
TYPED_TEST(MinidumpContextWriter, MinidumpContextX86Writer) {
StringFile string_file;
{
// Make sure that a context writer thats untouched writes a zeroed-out
// context.
SCOPED_TRACE("zero");
EmptyContextTest<MinidumpContextX86Writer, MinidumpContextX86, TypeParam>(
ExpectMinidumpContextX86);
}
{
SCOPED_TRACE("nonzero");
string_file.Reset();
constexpr uint32_t kSeed = 0x8086;
MinidumpContextX86Writer context_writer;
InitializeMinidumpContextX86(context_writer.context(), kSeed);
EXPECT_TRUE(context_writer.WriteEverything(&string_file));
ASSERT_EQ(string_file.string().size(), sizeof(MinidumpContextX86));
const MinidumpContextX86* observed =
MinidumpWritableAtRVA<MinidumpContextX86>(string_file.string(),
TypeParam(0));
ASSERT_TRUE(observed);
ExpectMinidumpContextX86(kSeed, observed, false);
}
}
TYPED_TEST(MinidumpContextWriter, MinidumpContextAMD64Writer) {
{
// Make sure that a heap-allocated context writer has the proper alignment,
// because it may be nonstandard.
auto context_writer = std::make_unique<MinidumpContextAMD64Writer>();
EXPECT_EQ(reinterpret_cast<uintptr_t>(context_writer.get()) &
(alignof(MinidumpContextAMD64Writer) - 1),
0u);
}
StringFile string_file;
{
// Make sure that a context writer thats untouched writes a zeroed-out
// context.
SCOPED_TRACE("zero");
EmptyContextTest<MinidumpContextAMD64Writer,
MinidumpContextAMD64,
TypeParam>(ExpectMinidumpContextAMD64);
}
{
SCOPED_TRACE("nonzero");
string_file.Reset();
constexpr uint32_t kSeed = 0x808664;
MinidumpContextAMD64Writer context_writer;
InitializeMinidumpContextAMD64(context_writer.context(), kSeed);
EXPECT_TRUE(context_writer.WriteEverything(&string_file));
ASSERT_EQ(string_file.string().size(), sizeof(MinidumpContextAMD64));
const MinidumpContextAMD64* observed =
MinidumpWritableAtRVA<MinidumpContextAMD64>(string_file.string(),
TypeParam(0));
ASSERT_TRUE(observed);
ExpectMinidumpContextAMD64(kSeed, observed, false);
}
}
template <typename Writer, typename Context, typename RVAType>
void FromSnapshotTest(const CPUContext& snapshot_context,
void (*expect_context)(uint32_t, const Context*, bool),
uint32_t seed) {
std::unique_ptr<::crashpad::MinidumpContextWriter> context_writer =
::crashpad::MinidumpContextWriter::CreateFromSnapshot(&snapshot_context);
ASSERT_TRUE(context_writer);
StringFile string_file;
ASSERT_TRUE(context_writer->WriteEverything(&string_file));
const Context* observed =
MinidumpWritableAtRVA<Context>(string_file.string(), RVAType(0));
ASSERT_TRUE(observed);
expect_context(seed, observed, true);
}
TYPED_TEST(MinidumpContextWriter, X86_FromSnapshot) {
constexpr uint32_t kSeed = 32;
CPUContextX86 context_x86;
CPUContext context;
context.x86 = &context_x86;
InitializeCPUContextX86(&context, kSeed);
FromSnapshotTest<MinidumpContextX86Writer, MinidumpContextX86, TypeParam>(
context, ExpectMinidumpContextX86, kSeed);
}
TYPED_TEST(MinidumpContextWriter, AMD64_FromSnapshot) {
constexpr uint32_t kSeed = 64;
CPUContextX86_64 context_x86_64;
CPUContext context;
context.x86_64 = &context_x86_64;
InitializeCPUContextX86_64(&context, kSeed);
FromSnapshotTest<MinidumpContextAMD64Writer, MinidumpContextAMD64, TypeParam>(
context, ExpectMinidumpContextAMD64, kSeed);
}
TYPED_TEST(MinidumpContextWriter, AMD64_CetFromSnapshot) {
constexpr uint32_t kSeed = 77;
CPUContextX86_64 context_x86_64;
CPUContext context;
context.x86_64 = &context_x86_64;
InitializeCPUContextX86_64(&context, kSeed);
context_x86_64.xstate.enabled_features |= XSTATE_MASK_CET_U;
context_x86_64.xstate.cet_u.cetmsr = 1;
context_x86_64.xstate.cet_u.ssp = kSeed * kSeed;
// We cannot use FromSnapshotTest as we write more than the fixed context.
std::unique_ptr<::crashpad::MinidumpContextWriter> context_writer =
::crashpad::MinidumpContextWriter::CreateFromSnapshot(&context);
ASSERT_TRUE(context_writer);
StringFile string_file;
ASSERT_TRUE(context_writer->WriteEverything(&string_file));
const MinidumpContextAMD64* observed =
MinidumpWritableAtRVA<MinidumpContextAMD64>(string_file.string(),
TypeParam(0));
ASSERT_TRUE(observed);
ExpectMinidumpContextAMD64(kSeed, observed, true);
}
TYPED_TEST(MinidumpContextWriter, ARM_Zeros) {
EmptyContextTest<MinidumpContextARMWriter, MinidumpContextARM, TypeParam>(
ExpectMinidumpContextARM);
}
TYPED_TEST(MinidumpContextWriter, ARM64_Zeros) {
EmptyContextTest<MinidumpContextARM64Writer, MinidumpContextARM64, TypeParam>(
ExpectMinidumpContextARM64);
}
TYPED_TEST(MinidumpContextWriter, ARM_FromSnapshot) {
constexpr uint32_t kSeed = 32;
CPUContextARM context_arm;
CPUContext context;
context.arm = &context_arm;
InitializeCPUContextARM(&context, kSeed);
FromSnapshotTest<MinidumpContextARMWriter, MinidumpContextARM, TypeParam>(
context, ExpectMinidumpContextARM, kSeed);
}
TYPED_TEST(MinidumpContextWriter, ARM64_FromSnapshot) {
constexpr uint32_t kSeed = 64;
CPUContextARM64 context_arm64;
CPUContext context;
context.arm64 = &context_arm64;
InitializeCPUContextARM64(&context, kSeed);
FromSnapshotTest<MinidumpContextARM64Writer, MinidumpContextARM64, TypeParam>(
context, ExpectMinidumpContextARM64, kSeed);
}
TYPED_TEST(MinidumpContextWriter, MIPS_Zeros) {
EmptyContextTest<MinidumpContextMIPSWriter, MinidumpContextMIPS, TypeParam>(
ExpectMinidumpContextMIPS);
}
TYPED_TEST(MinidumpContextWriter, MIPS64_Zeros) {
EmptyContextTest<MinidumpContextMIPS64Writer,
MinidumpContextMIPS64,
TypeParam>(ExpectMinidumpContextMIPS64);
}
TYPED_TEST(MinidumpContextWriter, MIPS_FromSnapshot) {
constexpr uint32_t kSeed = 32;
CPUContextMIPS context_mips;
CPUContext context;
context.mipsel = &context_mips;
InitializeCPUContextMIPS(&context, kSeed);
FromSnapshotTest<MinidumpContextMIPSWriter, MinidumpContextMIPS, TypeParam>(
context, ExpectMinidumpContextMIPS, kSeed);
}
TYPED_TEST(MinidumpContextWriter, MIPS64_FromSnapshot) {
constexpr uint32_t kSeed = 64;
CPUContextMIPS64 context_mips;
CPUContext context;
context.mips64 = &context_mips;
InitializeCPUContextMIPS64(&context, kSeed);
FromSnapshotTest<MinidumpContextMIPS64Writer,
MinidumpContextMIPS64,
TypeParam>(context, ExpectMinidumpContextMIPS64, kSeed);
}
} // namespace
} // namespace test
} // namespace crashpad