text: // 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 "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 {
  
  TEST(MinidumpContextWriter, MinidumpContextX86Writer) {
    StringFile string_file;
  
    {
      // Make sure that a context writer that’s untouched writes a zeroed-out
      // context.
      SCOPED_TRACE("zero");
  
      MinidumpContextX86Writer context_writer;
  
      EXPECT_TRUE(context_writer.WriteEverything(&string_file));
      ASSERT_EQ(string_file.string().size(), sizeof(MinidumpContextX86));
  
      const MinidumpContextX86* observed =
          MinidumpWritableAtRVA<MinidumpContextX86>(string_file.string(), 0);
      ASSERT_TRUE(observed);
  
      ExpectMinidumpContextX86(0, observed, false);
    }
  
    {
      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(), 0);
      ASSERT_TRUE(observed);
  
      ExpectMinidumpContextX86(kSeed, observed, false);
    }
  }
  
  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 that’s untouched writes a zeroed-out
      // context.
      SCOPED_TRACE("zero");
  
      MinidumpContextAMD64Writer context_writer;
  
      EXPECT_TRUE(context_writer.WriteEverything(&string_file));
      ASSERT_EQ(string_file.string().size(), sizeof(MinidumpContextAMD64));
  
      const MinidumpContextAMD64* observed =
          MinidumpWritableAtRVA<MinidumpContextAMD64>(string_file.string(), 0);
      ASSERT_TRUE(observed);
  
      ExpectMinidumpContextAMD64(0, observed, false);
    }
  
    {
      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(), 0);
      ASSERT_TRUE(observed);
  
      ExpectMinidumpContextAMD64(kSeed, observed, false);
    }
  }
  
  TEST(MinidumpContextWriter, CreateFromSnapshot_X86) {
    constexpr uint32_t kSeed = 32;
  
    CPUContextX86 context_snapshot_x86;
    CPUContext context_snapshot;
    context_snapshot.x86 = &context_snapshot_x86;
    InitializeCPUContextX86(&context_snapshot, kSeed);
  
    std::unique_ptr<MinidumpContextWriter> context_writer =
        MinidumpContextWriter::CreateFromSnapshot(&context_snapshot);
    ASSERT_TRUE(context_writer);
  
    StringFile string_file;
    ASSERT_TRUE(context_writer->WriteEverything(&string_file));
  
    const MinidumpContextX86* observed =
        MinidumpWritableAtRVA<MinidumpContextX86>(string_file.string(), 0);
    ASSERT_TRUE(observed);
  
    ExpectMinidumpContextX86(kSeed, observed, true);
  }
  
  TEST(MinidumpContextWriter, CreateFromSnapshot_AMD64) {
    constexpr uint32_t kSeed = 64;
  
    CPUContextX86_64 context_snapshot_x86_64;
    CPUContext context_snapshot;
    context_snapshot.x86_64 = &context_snapshot_x86_64;
    InitializeCPUContextX86_64(&context_snapshot, kSeed);
  
    std::unique_ptr<MinidumpContextWriter> context_writer =
        MinidumpContextWriter::CreateFromSnapshot(&context_snapshot);
    ASSERT_TRUE(context_writer);
  
    StringFile string_file;
    ASSERT_TRUE(context_writer->WriteEverything(&string_file));
  
    const MinidumpContextAMD64* observed =
        MinidumpWritableAtRVA<MinidumpContextAMD64>(string_file.string(), 0);
    ASSERT_TRUE(observed);
  
    ExpectMinidumpContextAMD64(kSeed, observed, true);
  }
  
  }  // namespace
  }  // namespace test
  }  // namespace crashpad
  