| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * 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 <openssl/sha.h> |
| #include <dirent.h> |
| #include <sys/types.h> |
| |
| #include <string> |
| #include <vector> |
| |
| #include "android-base/stringprintf.h" |
| #include "android-base/strings.h" |
| |
| #include "dexopt_test.h" |
| #include "leb128.h" |
| #include "runtime.h" |
| |
| #include <gtest/gtest.h> |
| |
| namespace art { |
| |
| using android::base::StringPrintf; |
| |
| class PatchoatTest : public DexoptTest { |
| public: |
| static bool ListDirFilesEndingWith( |
| const std::string& dir, |
| const std::string& suffix, |
| std::vector<std::string>* filenames, |
| std::string* error_msg) { |
| DIR* d = opendir(dir.c_str()); |
| if (d == nullptr) { |
| *error_msg = "Failed to open directory"; |
| return false; |
| } |
| dirent* e; |
| struct stat s; |
| size_t suffix_len = suffix.size(); |
| while ((e = readdir(d)) != nullptr) { |
| if ((strcmp(e->d_name, ".") == 0) || (strcmp(e->d_name, "..") == 0)) { |
| continue; |
| } |
| size_t name_len = strlen(e->d_name); |
| if ((name_len < suffix_len) || (strcmp(&e->d_name[name_len - suffix_len], suffix.c_str()))) { |
| continue; |
| } |
| std::string basename(e->d_name); |
| std::string filename = dir + "/" + basename; |
| int stat_result = lstat(filename.c_str(), &s); |
| if (stat_result != 0) { |
| *error_msg = |
| StringPrintf("Failed to stat %s: stat returned %d", filename.c_str(), stat_result); |
| return false; |
| } |
| if (S_ISDIR(s.st_mode)) { |
| continue; |
| } |
| filenames->push_back(basename); |
| } |
| closedir(d); |
| return true; |
| } |
| |
| static void AddRuntimeArg(std::vector<std::string>& args, const std::string& arg) { |
| args.push_back("--runtime-arg"); |
| args.push_back(arg); |
| } |
| |
| bool CompileBootImage(const std::vector<std::string>& extra_args, |
| const std::string& image_file_name_prefix, |
| uint32_t base_addr, |
| std::string* error_msg) { |
| Runtime* const runtime = Runtime::Current(); |
| std::vector<std::string> argv; |
| argv.push_back(runtime->GetCompilerExecutable()); |
| AddRuntimeArg(argv, "-Xms64m"); |
| AddRuntimeArg(argv, "-Xmx64m"); |
| std::vector<std::string> dex_files = GetLibCoreDexFileNames(); |
| for (const std::string& dex_file : dex_files) { |
| argv.push_back("--dex-file=" + dex_file); |
| argv.push_back("--dex-location=" + dex_file); |
| } |
| if (runtime->IsJavaDebuggable()) { |
| argv.push_back("--debuggable"); |
| } |
| runtime->AddCurrentRuntimeFeaturesAsDex2OatArguments(&argv); |
| |
| AddRuntimeArg(argv, "-Xverify:softfail"); |
| |
| if (!kIsTargetBuild) { |
| argv.push_back("--host"); |
| } |
| |
| argv.push_back("--image=" + image_file_name_prefix + ".art"); |
| argv.push_back("--oat-file=" + image_file_name_prefix + ".oat"); |
| argv.push_back("--oat-location=" + image_file_name_prefix + ".oat"); |
| argv.push_back(StringPrintf("--base=0x%" PRIx32, base_addr)); |
| argv.push_back("--compile-pic"); |
| argv.push_back("--multi-image"); |
| argv.push_back("--no-generate-debug-info"); |
| |
| std::vector<std::string> compiler_options = runtime->GetCompilerOptions(); |
| argv.insert(argv.end(), compiler_options.begin(), compiler_options.end()); |
| |
| // We must set --android-root. |
| const char* android_root = getenv("ANDROID_ROOT"); |
| CHECK(android_root != nullptr); |
| argv.push_back("--android-root=" + std::string(android_root)); |
| argv.insert(argv.end(), extra_args.begin(), extra_args.end()); |
| |
| return RunDex2OatOrPatchoat(argv, error_msg); |
| } |
| |
| bool RelocateBootImage(const std::string& input_image_location, |
| const std::string& output_image_filename, |
| off_t base_offset_delta, |
| std::string* error_msg) { |
| Runtime* const runtime = Runtime::Current(); |
| std::vector<std::string> argv; |
| argv.push_back(runtime->GetPatchoatExecutable()); |
| argv.push_back("--input-image-location=" + input_image_location); |
| argv.push_back("--output-image-file=" + output_image_filename); |
| argv.push_back(StringPrintf("--base-offset-delta=0x%jx", (intmax_t) base_offset_delta)); |
| argv.push_back(StringPrintf("--instruction-set=%s", GetInstructionSetString(kRuntimeISA))); |
| |
| return RunDex2OatOrPatchoat(argv, error_msg); |
| } |
| |
| bool GenerateBootImageRelFile(const std::string& input_image_location, |
| const std::string& output_rel_filename, |
| off_t base_offset_delta, |
| std::string* error_msg) { |
| Runtime* const runtime = Runtime::Current(); |
| std::vector<std::string> argv; |
| argv.push_back(runtime->GetPatchoatExecutable()); |
| argv.push_back("--input-image-location=" + input_image_location); |
| argv.push_back("--output-image-relocation-file=" + output_rel_filename); |
| argv.push_back(StringPrintf("--base-offset-delta=0x%jx", (intmax_t) base_offset_delta)); |
| argv.push_back(StringPrintf("--instruction-set=%s", GetInstructionSetString(kRuntimeISA))); |
| |
| return RunDex2OatOrPatchoat(argv, error_msg); |
| } |
| |
| bool RunDex2OatOrPatchoat(const std::vector<std::string>& args, std::string* error_msg) { |
| int link[2]; |
| |
| if (pipe(link) == -1) { |
| return false; |
| } |
| |
| pid_t pid = fork(); |
| if (pid == -1) { |
| return false; |
| } |
| |
| if (pid == 0) { |
| // We need dex2oat to actually log things. |
| setenv("ANDROID_LOG_TAGS", "*:e", 1); |
| dup2(link[1], STDERR_FILENO); |
| close(link[0]); |
| close(link[1]); |
| std::vector<const char*> c_args; |
| for (const std::string& str : args) { |
| c_args.push_back(str.c_str()); |
| } |
| c_args.push_back(nullptr); |
| execv(c_args[0], const_cast<char* const*>(c_args.data())); |
| exit(1); |
| UNREACHABLE(); |
| } else { |
| close(link[1]); |
| char buffer[128]; |
| memset(buffer, 0, 128); |
| ssize_t bytes_read = 0; |
| |
| while (TEMP_FAILURE_RETRY(bytes_read = read(link[0], buffer, 128)) > 0) { |
| *error_msg += std::string(buffer, bytes_read); |
| } |
| close(link[0]); |
| int status = -1; |
| if (waitpid(pid, &status, 0) != -1) { |
| return (status == 0); |
| } |
| return false; |
| } |
| } |
| |
| bool CompileBootImageToDir( |
| const std::string& output_dir, |
| const std::vector<std::string>& dex2oat_extra_args, |
| uint32_t base_addr, |
| std::string* error_msg) { |
| return CompileBootImage(dex2oat_extra_args, output_dir + "/boot", base_addr, error_msg); |
| } |
| |
| bool CopyImageChecksumAndSetPatchDelta( |
| const std::string& src_image_filename, |
| const std::string& dest_image_filename, |
| off_t dest_patch_delta, |
| std::string* error_msg) { |
| std::unique_ptr<File> src_file(OS::OpenFileForReading(src_image_filename.c_str())); |
| if (src_file.get() == nullptr) { |
| *error_msg = StringPrintf("Failed to open source image file %s", src_image_filename.c_str()); |
| return false; |
| } |
| ImageHeader src_header; |
| if (!src_file->ReadFully(&src_header, sizeof(src_header))) { |
| *error_msg = StringPrintf("Failed to read source image file %s", src_image_filename.c_str()); |
| return false; |
| } |
| |
| std::unique_ptr<File> dest_file(OS::OpenFileReadWrite(dest_image_filename.c_str())); |
| if (dest_file.get() == nullptr) { |
| *error_msg = |
| StringPrintf("Failed to open destination image file %s", dest_image_filename.c_str()); |
| return false; |
| } |
| ImageHeader dest_header; |
| if (!dest_file->ReadFully(&dest_header, sizeof(dest_header))) { |
| *error_msg = |
| StringPrintf("Failed to read destination image file %s", dest_image_filename.c_str()); |
| return false; |
| } |
| dest_header.SetOatChecksum(src_header.GetOatChecksum()); |
| dest_header.SetPatchDelta(dest_patch_delta); |
| if (!dest_file->ResetOffset()) { |
| *error_msg = |
| StringPrintf( |
| "Failed to seek to start of destination image file %s", dest_image_filename.c_str()); |
| return false; |
| } |
| if (!dest_file->WriteFully(&dest_header, sizeof(dest_header))) { |
| *error_msg = |
| StringPrintf("Failed to write to destination image file %s", dest_image_filename.c_str()); |
| dest_file->Erase(); |
| return false; |
| } |
| if (dest_file->FlushCloseOrErase() != 0) { |
| *error_msg = |
| StringPrintf( |
| "Failed to flush/close destination image file %s", dest_image_filename.c_str()); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| bool ReadFully( |
| const std::string& filename, std::vector<uint8_t>* contents, std::string* error_msg) { |
| std::unique_ptr<File> file(OS::OpenFileForReading(filename.c_str())); |
| if (file.get() == nullptr) { |
| *error_msg = "Failed to open"; |
| return false; |
| } |
| int64_t size = file->GetLength(); |
| if (size < 0) { |
| *error_msg = "Failed to get size"; |
| return false; |
| } |
| contents->resize(size); |
| if (!file->ReadFully(&(*contents)[0], size)) { |
| *error_msg = "Failed to read"; |
| contents->clear(); |
| return false; |
| } |
| return true; |
| } |
| |
| bool BinaryDiff( |
| const std::string& filename1, |
| const std::vector<uint8_t>& data1, |
| const std::string& filename2, |
| const std::vector<uint8_t>& data2, |
| std::string* error_msg) { |
| if (data1.size() != data1.size()) { |
| *error_msg = |
| StringPrintf( |
| "%s and %s are of different size: %zu vs %zu", |
| filename1.c_str(), |
| filename2.c_str(), |
| data1.size(), |
| data2.size()); |
| return true; |
| } |
| size_t size = data1.size(); |
| for (size_t i = 0; i < size; i++) { |
| if (data1[i] != data2[i]) { |
| *error_msg = |
| StringPrintf("%s and %s differ at offset %zu", filename1.c_str(), filename2.c_str(), i); |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| bool BinaryDiff( |
| const std::string& filename1, const std::string& filename2, std::string* error_msg) { |
| std::string read_error_msg; |
| std::vector<uint8_t> image1; |
| if (!ReadFully(filename1, &image1, &read_error_msg)) { |
| *error_msg = StringPrintf("Failed to read %s: %s", filename1.c_str(), read_error_msg.c_str()); |
| return true; |
| } |
| std::vector<uint8_t> image2; |
| if (!ReadFully(filename2, &image2, &read_error_msg)) { |
| *error_msg = StringPrintf("Failed to read %s: %s", filename2.c_str(), read_error_msg.c_str()); |
| return true; |
| } |
| return BinaryDiff(filename1, image1, filename2, image2, error_msg); |
| } |
| |
| bool IsImageIdenticalToOriginalExceptForRelocation( |
| const std::string& relocated_filename, |
| const std::string& original_filename, |
| const std::string& rel_filename, |
| std::string* error_msg) { |
| *error_msg = ""; |
| std::string read_error_msg; |
| std::vector<uint8_t> rel; |
| if (!ReadFully(rel_filename, &rel, &read_error_msg)) { |
| *error_msg = |
| StringPrintf("Failed to read %s: %s", rel_filename.c_str(), read_error_msg.c_str()); |
| return false; |
| } |
| std::vector<uint8_t> relocated; |
| if (!ReadFully(relocated_filename, &relocated, &read_error_msg)) { |
| *error_msg = |
| StringPrintf("Failed to read %s: %s", relocated_filename.c_str(), read_error_msg.c_str()); |
| return false; |
| } |
| |
| size_t image_size = relocated.size(); |
| if ((image_size % 4) != 0) { |
| *error_msg = |
| StringPrintf( |
| "Relocated image file %s size not multiple of 4: %zu", |
| relocated_filename.c_str(), image_size); |
| return false; |
| } |
| if (image_size > UINT32_MAX) { |
| *error_msg = |
| StringPrintf( |
| "Relocated image file %s too large: %zu" , relocated_filename.c_str(), image_size); |
| return false; |
| } |
| |
| const ImageHeader& relocated_header = *reinterpret_cast<const ImageHeader*>(relocated.data()); |
| off_t expected_diff = relocated_header.GetPatchDelta(); |
| |
| if (expected_diff != 0) { |
| // Relocated image is expected to differ from the original due to relocation. |
| // Unrelocate the image in memory to compensate. |
| uint8_t* image_start = relocated.data(); |
| const uint8_t* rel_end = &rel[rel.size()]; |
| if (rel.size() < SHA256_DIGEST_LENGTH) { |
| *error_msg = |
| StringPrintf("Malformed image relocation file %s: too short", rel_filename.c_str()); |
| return false; |
| } |
| const uint8_t* rel_ptr = &rel[SHA256_DIGEST_LENGTH]; |
| // The remaining .rel file consists of offsets at which relocation should've occurred. |
| // For each offset, we "unrelocate" the image by subtracting the expected relocation |
| // diff value (as specified in the image header). |
| // |
| // Each offset is encoded as a delta/diff relative to the previous offset. With the |
| // very first offset being encoded relative to offset 0. |
| // Deltas are encoded using little-endian 7 bits per byte encoding, with all bytes except |
| // the last one having the highest bit set. |
| uint32_t offset = 0; |
| while (rel_ptr != rel_end) { |
| uint32_t offset_delta = 0; |
| if (DecodeUnsignedLeb128Checked(&rel_ptr, rel_end, &offset_delta)) { |
| offset += offset_delta; |
| uint32_t *image_value = reinterpret_cast<uint32_t*>(image_start + offset); |
| *image_value -= expected_diff; |
| } else { |
| *error_msg = |
| StringPrintf( |
| "Malformed image relocation file %s: " |
| "last byte has it's most significant bit set", |
| rel_filename.c_str()); |
| return false; |
| } |
| } |
| } |
| |
| // Image in memory is now supposed to be identical to the original. Compare it to the original. |
| std::vector<uint8_t> original; |
| if (!ReadFully(original_filename, &original, &read_error_msg)) { |
| *error_msg = |
| StringPrintf("Failed to read %s: %s", original_filename.c_str(), read_error_msg.c_str()); |
| return false; |
| } |
| if (BinaryDiff(relocated_filename, relocated, original_filename, original, error_msg)) { |
| return false; |
| } |
| |
| // Relocated image is identical to the original, once relocations are taken into account |
| return true; |
| } |
| }; |
| |
| TEST_F(PatchoatTest, PatchoatRelocationSameAsDex2oatRelocation) { |
| #if defined(ART_USE_READ_BARRIER) |
| // This test checks that relocating a boot image using patchoat produces the same result as |
| // producing the boot image for that relocated base address using dex2oat. To be precise, these |
| // two files will have two small differences: the OAT checksum and base address. However, this |
| // test takes this into account. |
| |
| // Compile boot image into a random directory using dex2oat |
| ScratchFile dex2oat_orig_scratch; |
| dex2oat_orig_scratch.Unlink(); |
| std::string dex2oat_orig_dir = dex2oat_orig_scratch.GetFilename(); |
| ASSERT_EQ(0, mkdir(dex2oat_orig_dir.c_str(), 0700)); |
| const uint32_t orig_base_addr = 0x60000000; |
| // Force deterministic output. We want the boot images created by this dex2oat run and the run |
| // below to differ only in their base address. |
| std::vector<std::string> dex2oat_extra_args; |
| dex2oat_extra_args.push_back("--force-determinism"); |
| dex2oat_extra_args.push_back("-j1"); // Might not be needed. Causes a 3-5x slowdown. |
| std::string error_msg; |
| if (!CompileBootImageToDir(dex2oat_orig_dir, dex2oat_extra_args, orig_base_addr, &error_msg)) { |
| FAIL() << "CompileBootImage1 failed: " << error_msg; |
| } |
| |
| // Compile a "relocated" boot image into a random directory using dex2oat. This image is relocated |
| // in the sense that it uses a different base address. |
| ScratchFile dex2oat_reloc_scratch; |
| dex2oat_reloc_scratch.Unlink(); |
| std::string dex2oat_reloc_dir = dex2oat_reloc_scratch.GetFilename(); |
| ASSERT_EQ(0, mkdir(dex2oat_reloc_dir.c_str(), 0700)); |
| const uint32_t reloc_base_addr = 0x70000000; |
| if (!CompileBootImageToDir(dex2oat_reloc_dir, dex2oat_extra_args, reloc_base_addr, &error_msg)) { |
| FAIL() << "CompileBootImage2 failed: " << error_msg; |
| } |
| const off_t base_addr_delta = reloc_base_addr - orig_base_addr; |
| |
| // Relocate the original boot image using patchoat. The image is relocated by the same amount |
| // as the second/relocated image produced by dex2oat. |
| ScratchFile patchoat_scratch; |
| patchoat_scratch.Unlink(); |
| std::string patchoat_dir = patchoat_scratch.GetFilename(); |
| ASSERT_EQ(0, mkdir(patchoat_dir.c_str(), 0700)); |
| std::string dex2oat_orig_with_arch_dir = |
| dex2oat_orig_dir + "/" + GetInstructionSetString(kRuntimeISA); |
| // The arch-including symlink is needed by patchoat |
| ASSERT_EQ(0, symlink(dex2oat_orig_dir.c_str(), dex2oat_orig_with_arch_dir.c_str())); |
| if (!RelocateBootImage( |
| dex2oat_orig_dir + "/boot.art", |
| patchoat_dir + "/boot.art", |
| base_addr_delta, |
| &error_msg)) { |
| FAIL() << "RelocateBootImage failed: " << error_msg; |
| } |
| |
| // Assert that patchoat created the same set of .art files as dex2oat |
| std::vector<std::string> dex2oat_image_basenames; |
| std::vector<std::string> patchoat_image_basenames; |
| if (!ListDirFilesEndingWith(dex2oat_reloc_dir, ".art", &dex2oat_image_basenames, &error_msg)) { |
| FAIL() << "Failed to list *.art files in " << dex2oat_reloc_dir << ": " << error_msg; |
| } |
| if (!ListDirFilesEndingWith(patchoat_dir, ".art", &patchoat_image_basenames, &error_msg)) { |
| FAIL() << "Failed to list *.art files in " << patchoat_dir << ": " << error_msg; |
| } |
| std::sort(dex2oat_image_basenames.begin(), dex2oat_image_basenames.end()); |
| std::sort(patchoat_image_basenames.begin(), patchoat_image_basenames.end()); |
| // .art file names output by patchoat look like tmp@art-data-<random>-<random>@boot*.art. To |
| // compare these with .art file names output by dex2oat we retain only the part of the file name |
| // after the last @. |
| std::vector<std::string> patchoat_image_shortened_basenames(patchoat_image_basenames.size()); |
| for (size_t i = 0; i < patchoat_image_basenames.size(); i++) { |
| patchoat_image_shortened_basenames[i] = |
| patchoat_image_basenames[i].substr(patchoat_image_basenames[i].find_last_of("@") + 1); |
| } |
| ASSERT_EQ(dex2oat_image_basenames, patchoat_image_shortened_basenames); |
| |
| // Patch up the dex2oat-relocated image files so that it looks as though they were relocated by |
| // patchoat. patchoat preserves the OAT checksum header field and sets patch delta header field. |
| for (const std::string& image_basename : dex2oat_image_basenames) { |
| if (!CopyImageChecksumAndSetPatchDelta( |
| dex2oat_orig_dir + "/" + image_basename, |
| dex2oat_reloc_dir + "/" + image_basename, |
| base_addr_delta, |
| &error_msg)) { |
| FAIL() << "Unable to patch up " << image_basename << ": " << error_msg; |
| } |
| } |
| |
| // Assert that the patchoat-relocated images are identical to the dex2oat-relocated images |
| for (size_t i = 0; i < dex2oat_image_basenames.size(); i++) { |
| const std::string& dex2oat_image_basename = dex2oat_image_basenames[i]; |
| const std::string& dex2oat_image_filename = dex2oat_reloc_dir + "/" + dex2oat_image_basename; |
| const std::string& patchoat_image_filename = patchoat_dir + "/" + patchoat_image_basenames[i]; |
| if (BinaryDiff(dex2oat_image_filename, patchoat_image_filename, &error_msg)) { |
| FAIL() << "patchoat- and dex2oat-relocated variants of " << dex2oat_image_basename |
| << " differ: " << error_msg; |
| } |
| } |
| |
| ClearDirectory(dex2oat_orig_dir.c_str(), /*recursive*/ true); |
| ClearDirectory(dex2oat_reloc_dir.c_str(), /*recursive*/ true); |
| ClearDirectory(patchoat_dir.c_str(), /*recursive*/ true); |
| rmdir(dex2oat_orig_dir.c_str()); |
| rmdir(dex2oat_reloc_dir.c_str()); |
| rmdir(patchoat_dir.c_str()); |
| #else |
| LOG(INFO) << "Skipping PatchoatRelocationSameAsDex2oatRelocation"; |
| // Force-print to std::cout so it's also outside the logcat. |
| std::cout << "Skipping PatchoatRelocationSameAsDex2oatRelocation" << std::endl; |
| #endif |
| } |
| |
| TEST_F(PatchoatTest, RelFileSufficientToUnpatch) { |
| // This test checks that a boot image relocated using patchoat can be unrelocated using the .rel |
| // file created by patchoat. |
| |
| // This test doesn't work when heap poisoning is enabled because some of the |
| // references are negated. b/72117833 is tracking the effort to have patchoat |
| // and its tests support heap poisoning. |
| TEST_DISABLED_FOR_HEAP_POISONING(); |
| |
| // Compile boot image into a random directory using dex2oat |
| ScratchFile dex2oat_orig_scratch; |
| dex2oat_orig_scratch.Unlink(); |
| std::string dex2oat_orig_dir = dex2oat_orig_scratch.GetFilename(); |
| ASSERT_EQ(0, mkdir(dex2oat_orig_dir.c_str(), 0700)); |
| const uint32_t orig_base_addr = 0x60000000; |
| std::vector<std::string> dex2oat_extra_args; |
| std::string error_msg; |
| if (!CompileBootImageToDir(dex2oat_orig_dir, dex2oat_extra_args, orig_base_addr, &error_msg)) { |
| FAIL() << "CompileBootImage1 failed: " << error_msg; |
| } |
| |
| // Generate image relocation file for the original boot image |
| ScratchFile rel_scratch; |
| rel_scratch.Unlink(); |
| std::string rel_dir = rel_scratch.GetFilename(); |
| ASSERT_EQ(0, mkdir(rel_dir.c_str(), 0700)); |
| std::string dex2oat_orig_with_arch_dir = |
| dex2oat_orig_dir + "/" + GetInstructionSetString(kRuntimeISA); |
| // The arch-including symlink is needed by patchoat |
| ASSERT_EQ(0, symlink(dex2oat_orig_dir.c_str(), dex2oat_orig_with_arch_dir.c_str())); |
| off_t base_addr_delta = 0x100000; |
| if (!GenerateBootImageRelFile( |
| dex2oat_orig_dir + "/boot.art", |
| rel_dir + "/boot.art.rel", |
| base_addr_delta, |
| &error_msg)) { |
| FAIL() << "RelocateBootImage failed: " << error_msg; |
| } |
| |
| // Relocate the original boot image using patchoat |
| ScratchFile relocated_scratch; |
| relocated_scratch.Unlink(); |
| std::string relocated_dir = relocated_scratch.GetFilename(); |
| ASSERT_EQ(0, mkdir(relocated_dir.c_str(), 0700)); |
| // Use a different relocation delta from the one used when generating .rel files above. This is |
| // to make sure .rel files are not specific to a particular relocation delta. |
| base_addr_delta -= 0x10000; |
| if (!RelocateBootImage( |
| dex2oat_orig_dir + "/boot.art", |
| relocated_dir + "/boot.art", |
| base_addr_delta, |
| &error_msg)) { |
| FAIL() << "RelocateBootImage failed: " << error_msg; |
| } |
| |
| // Assert that patchoat created the same set of .art and .art.rel files |
| std::vector<std::string> rel_basenames; |
| std::vector<std::string> relocated_image_basenames; |
| if (!ListDirFilesEndingWith(rel_dir, "", &rel_basenames, &error_msg)) { |
| FAIL() << "Failed to list *.art.rel files in " << rel_dir << ": " << error_msg; |
| } |
| if (!ListDirFilesEndingWith(relocated_dir, ".art", &relocated_image_basenames, &error_msg)) { |
| FAIL() << "Failed to list *.art files in " << relocated_dir << ": " << error_msg; |
| } |
| std::sort(rel_basenames.begin(), rel_basenames.end()); |
| std::sort(relocated_image_basenames.begin(), relocated_image_basenames.end()); |
| |
| // .art and .art.rel file names output by patchoat look like |
| // tmp@art-data-<random>-<random>@boot*.art, encoding the name of the directory in their name. |
| // To compare these with each other, we retain only the part of the file name after the last @, |
| // and we also drop the extension. |
| std::vector<std::string> rel_shortened_basenames(rel_basenames.size()); |
| std::vector<std::string> relocated_image_shortened_basenames(relocated_image_basenames.size()); |
| for (size_t i = 0; i < rel_basenames.size(); i++) { |
| rel_shortened_basenames[i] = rel_basenames[i].substr(rel_basenames[i].find_last_of("@") + 1); |
| rel_shortened_basenames[i] = |
| rel_shortened_basenames[i].substr(0, rel_shortened_basenames[i].find(".")); |
| } |
| for (size_t i = 0; i < relocated_image_basenames.size(); i++) { |
| relocated_image_shortened_basenames[i] = |
| relocated_image_basenames[i].substr(relocated_image_basenames[i].find_last_of("@") + 1); |
| relocated_image_shortened_basenames[i] = |
| relocated_image_shortened_basenames[i].substr( |
| 0, relocated_image_shortened_basenames[i].find(".")); |
| } |
| ASSERT_EQ(rel_shortened_basenames, relocated_image_shortened_basenames); |
| |
| // For each image file, assert that unrelocating the image produces its original version |
| for (size_t i = 0; i < relocated_image_basenames.size(); i++) { |
| const std::string& original_image_filename = |
| dex2oat_orig_dir + "/" + relocated_image_shortened_basenames[i] + ".art"; |
| const std::string& relocated_image_filename = |
| relocated_dir + "/" + relocated_image_basenames[i]; |
| const std::string& rel_filename = rel_dir + "/" + rel_basenames[i]; |
| |
| // Assert that relocated image differs from the original |
| if (!BinaryDiff(original_image_filename, relocated_image_filename, &error_msg)) { |
| FAIL() << "Relocated image " << relocated_image_filename |
| << " identical to the original image " << original_image_filename; |
| } |
| |
| // Assert that relocated image is identical to the original except for relocations described in |
| // the .rel file |
| if (!IsImageIdenticalToOriginalExceptForRelocation( |
| relocated_image_filename, original_image_filename, rel_filename, &error_msg)) { |
| FAIL() << "Unrelocating " << relocated_image_filename << " using " << rel_filename |
| << " did not produce the same output as " << original_image_filename << ": " << error_msg; |
| } |
| |
| // Assert that the digest of original image in .rel file is as expected |
| std::vector<uint8_t> original; |
| if (!ReadFully(original_image_filename, &original, &error_msg)) { |
| FAIL() << "Failed to read original image " << original_image_filename; |
| } |
| std::vector<uint8_t> rel; |
| if (!ReadFully(rel_filename, &rel, &error_msg)) { |
| FAIL() << "Failed to read image relocation file " << rel_filename; |
| } |
| uint8_t original_image_digest[SHA256_DIGEST_LENGTH]; |
| SHA256(original.data(), original.size(), original_image_digest); |
| const uint8_t* original_image_digest_in_rel_file = rel.data(); |
| if (memcmp(original_image_digest_in_rel_file, original_image_digest, SHA256_DIGEST_LENGTH)) { |
| FAIL() << "Digest of original image in " << rel_filename << " does not match the original" |
| " image " << original_image_filename; |
| } |
| } |
| |
| ClearDirectory(dex2oat_orig_dir.c_str(), /*recursive*/ true); |
| ClearDirectory(rel_dir.c_str(), /*recursive*/ true); |
| ClearDirectory(relocated_dir.c_str(), /*recursive*/ true); |
| |
| rmdir(dex2oat_orig_dir.c_str()); |
| rmdir(rel_dir.c_str()); |
| rmdir(relocated_dir.c_str()); |
| } |
| |
| } // namespace art |
