Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2014 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #include <stdio.h> |
| 18 | #include <stdlib.h> |
| 19 | |
| 20 | #include <fstream> |
Andreas Gampe | 7ad71d0 | 2016-04-04 13:49:18 -0700 | [diff] [blame] | 21 | #include <functional> |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 22 | #include <iostream> |
| 23 | #include <string> |
| 24 | #include <vector> |
| 25 | #include <set> |
| 26 | #include <map> |
Mathieu Chartier | cb044bc | 2016-04-01 13:56:41 -0700 | [diff] [blame] | 27 | #include <unordered_set> |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 28 | |
Andreas Gampe | 46ee31b | 2016-12-14 10:11:49 -0800 | [diff] [blame] | 29 | #include "android-base/stringprintf.h" |
| 30 | |
Andreas Gampe | a1d2f95 | 2017-04-20 22:53:58 -0700 | [diff] [blame] | 31 | #include "art_field-inl.h" |
Mathieu Chartier | e401d14 | 2015-04-22 13:56:20 -0700 | [diff] [blame] | 32 | #include "art_method-inl.h" |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 33 | #include "base/unix_file/fd_file.h" |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 34 | #include "gc/space/image_space.h" |
| 35 | #include "gc/heap.h" |
| 36 | #include "mirror/class-inl.h" |
| 37 | #include "mirror/object-inl.h" |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 38 | #include "image.h" |
Mathieu Chartier | 0795f23 | 2016-09-27 18:43:30 -0700 | [diff] [blame] | 39 | #include "scoped_thread_state_change-inl.h" |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 40 | #include "os.h" |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 41 | |
| 42 | #include "cmdline.h" |
| 43 | #include "backtrace/BacktraceMap.h" |
| 44 | |
| 45 | #include <sys/stat.h> |
| 46 | #include <sys/types.h> |
| 47 | #include <signal.h> |
| 48 | |
| 49 | namespace art { |
| 50 | |
Andreas Gampe | 46ee31b | 2016-12-14 10:11:49 -0800 | [diff] [blame] | 51 | using android::base::StringPrintf; |
| 52 | |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 53 | class ImgDiagDumper { |
| 54 | public: |
| 55 | explicit ImgDiagDumper(std::ostream* os, |
Mathieu Chartier | cb044bc | 2016-04-01 13:56:41 -0700 | [diff] [blame] | 56 | const ImageHeader& image_header, |
| 57 | const std::string& image_location, |
Mathieu Chartier | c5196cd | 2016-04-08 14:08:37 -0700 | [diff] [blame] | 58 | pid_t image_diff_pid, |
| 59 | pid_t zygote_diff_pid) |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 60 | : os_(os), |
| 61 | image_header_(image_header), |
| 62 | image_location_(image_location), |
Mathieu Chartier | c5196cd | 2016-04-08 14:08:37 -0700 | [diff] [blame] | 63 | image_diff_pid_(image_diff_pid), |
David Sehr | 20e271a | 2017-06-14 13:02:14 -0700 | [diff] [blame] | 64 | zygote_diff_pid_(zygote_diff_pid), |
| 65 | zygote_pid_only_(false) {} |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 66 | |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 67 | bool Init() { |
| 68 | std::ostream& os = *os_; |
| 69 | |
| 70 | { |
| 71 | struct stat sts; |
| 72 | std::string proc_pid_str = |
| 73 | StringPrintf("/proc/%ld", static_cast<long>(image_diff_pid_)); // NOLINT [runtime/int] |
| 74 | if (stat(proc_pid_str.c_str(), &sts) == -1) { |
| 75 | os << "Process does not exist"; |
| 76 | return false; |
| 77 | } |
| 78 | } |
| 79 | |
| 80 | // Open /proc/$pid/maps to view memory maps |
| 81 | auto tmp_proc_maps = std::unique_ptr<BacktraceMap>(BacktraceMap::Create(image_diff_pid_)); |
| 82 | if (tmp_proc_maps == nullptr) { |
| 83 | os << "Could not read backtrace maps"; |
| 84 | return false; |
| 85 | } |
| 86 | |
| 87 | bool found_boot_map = false; |
| 88 | // Find the memory map only for boot.art |
| 89 | for (const backtrace_map_t& map : *tmp_proc_maps) { |
| 90 | if (EndsWith(map.name, GetImageLocationBaseName())) { |
| 91 | if ((map.flags & PROT_WRITE) != 0) { |
| 92 | boot_map_ = map; |
| 93 | found_boot_map = true; |
| 94 | break; |
| 95 | } |
| 96 | // In actuality there's more than 1 map, but the second one is read-only. |
| 97 | // The one we care about is the write-able map. |
| 98 | // The readonly maps are guaranteed to be identical, so its not interesting to compare |
| 99 | // them. |
| 100 | } |
| 101 | } |
| 102 | |
| 103 | if (!found_boot_map) { |
| 104 | os << "Could not find map for " << GetImageLocationBaseName(); |
| 105 | return false; |
| 106 | } |
| 107 | // Sanity check boot_map_. |
| 108 | CHECK(boot_map_.end >= boot_map_.start); |
| 109 | boot_map_size_ = boot_map_.end - boot_map_.start; |
| 110 | |
| 111 | pointer_size_ = InstructionSetPointerSize(Runtime::Current()->GetInstructionSet()); |
| 112 | |
| 113 | // Open /proc/<image_diff_pid_>/mem and read as remote_contents_. |
| 114 | std::string image_file_name = |
| 115 | StringPrintf("/proc/%ld/mem", static_cast<long>(image_diff_pid_)); // NOLINT [runtime/int] |
| 116 | auto image_map_file = std::unique_ptr<File>(OS::OpenFileForReading(image_file_name.c_str())); |
| 117 | if (image_map_file == nullptr) { |
| 118 | os << "Failed to open " << image_file_name << " for reading"; |
| 119 | return false; |
| 120 | } |
| 121 | std::vector<uint8_t> tmp_remote_contents(boot_map_size_); |
| 122 | if (!image_map_file->PreadFully(&tmp_remote_contents[0], boot_map_size_, boot_map_.start)) { |
| 123 | os << "Could not fully read file " << image_file_name; |
| 124 | return false; |
| 125 | } |
| 126 | |
| 127 | // If zygote_diff_pid_ != -1, open /proc/<zygote_diff_pid_>/mem and read as zygote_contents_. |
| 128 | std::vector<uint8_t> tmp_zygote_contents; |
| 129 | if (zygote_diff_pid_ != -1) { |
| 130 | std::string zygote_file_name = |
| 131 | StringPrintf("/proc/%ld/mem", static_cast<long>(zygote_diff_pid_)); // NOLINT [runtime/int] |
| 132 | std::unique_ptr<File> zygote_map_file(OS::OpenFileForReading(zygote_file_name.c_str())); |
| 133 | if (zygote_map_file == nullptr) { |
| 134 | os << "Failed to open " << zygote_file_name << " for reading"; |
| 135 | return false; |
| 136 | } |
| 137 | // The boot map should be at the same address. |
| 138 | tmp_zygote_contents.reserve(boot_map_size_); |
| 139 | if (!zygote_map_file->PreadFully(&tmp_zygote_contents[0], boot_map_size_, boot_map_.start)) { |
| 140 | LOG(WARNING) << "Could not fully read zygote file " << zygote_file_name; |
| 141 | return false; |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | // Open /proc/<image_diff_pid_>/pagemap. |
| 146 | std::string pagemap_file_name = StringPrintf( |
| 147 | "/proc/%ld/pagemap", static_cast<long>(image_diff_pid_)); // NOLINT [runtime/int] |
| 148 | auto tmp_pagemap_file = |
| 149 | std::unique_ptr<File>(OS::OpenFileForReading(pagemap_file_name.c_str())); |
| 150 | if (tmp_pagemap_file == nullptr) { |
| 151 | os << "Failed to open " << pagemap_file_name << " for reading: " << strerror(errno); |
| 152 | return false; |
| 153 | } |
| 154 | |
| 155 | // Not truly clean, mmap-ing boot.art again would be more pristine, but close enough |
| 156 | const char* clean_pagemap_file_name = "/proc/self/pagemap"; |
| 157 | auto tmp_clean_pagemap_file = std::unique_ptr<File>( |
| 158 | OS::OpenFileForReading(clean_pagemap_file_name)); |
| 159 | if (tmp_clean_pagemap_file == nullptr) { |
| 160 | os << "Failed to open " << clean_pagemap_file_name << " for reading: " << strerror(errno); |
| 161 | return false; |
| 162 | } |
| 163 | |
| 164 | auto tmp_kpageflags_file = std::unique_ptr<File>(OS::OpenFileForReading("/proc/kpageflags")); |
| 165 | if (tmp_kpageflags_file == nullptr) { |
| 166 | os << "Failed to open /proc/kpageflags for reading: " << strerror(errno); |
| 167 | return false; |
| 168 | } |
| 169 | |
| 170 | auto tmp_kpagecount_file = std::unique_ptr<File>(OS::OpenFileForReading("/proc/kpagecount")); |
| 171 | if (tmp_kpagecount_file == nullptr) { |
| 172 | os << "Failed to open /proc/kpagecount for reading:" << strerror(errno); |
| 173 | return false; |
| 174 | } |
| 175 | |
| 176 | // Commit the mappings, etc., to the object state. |
| 177 | proc_maps_ = std::move(tmp_proc_maps); |
| 178 | remote_contents_ = std::move(tmp_remote_contents); |
| 179 | zygote_contents_ = std::move(tmp_zygote_contents); |
| 180 | pagemap_file_ = std::move(*tmp_pagemap_file.release()); |
| 181 | clean_pagemap_file_ = std::move(*tmp_clean_pagemap_file.release()); |
| 182 | kpageflags_file_ = std::move(*tmp_kpageflags_file.release()); |
| 183 | kpagecount_file_ = std::move(*tmp_kpagecount_file.release()); |
| 184 | |
| 185 | return true; |
| 186 | } |
| 187 | |
Andreas Gampe | bdf7f1c | 2016-08-30 16:38:47 -0700 | [diff] [blame] | 188 | bool Dump() REQUIRES_SHARED(Locks::mutator_lock_) { |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 189 | std::ostream& os = *os_; |
Mathieu Chartier | cb044bc | 2016-04-01 13:56:41 -0700 | [diff] [blame] | 190 | os << "IMAGE LOCATION: " << image_location_ << "\n\n"; |
| 191 | |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 192 | os << "MAGIC: " << image_header_.GetMagic() << "\n\n"; |
| 193 | |
| 194 | os << "IMAGE BEGIN: " << reinterpret_cast<void*>(image_header_.GetImageBegin()) << "\n\n"; |
| 195 | |
David Sehr | 20e271a | 2017-06-14 13:02:14 -0700 | [diff] [blame] | 196 | PrintPidLine("IMAGE", image_diff_pid_); |
| 197 | os << "\n\n"; |
| 198 | PrintPidLine("ZYGOTE", zygote_diff_pid_); |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 199 | bool ret = true; |
David Sehr | 20e271a | 2017-06-14 13:02:14 -0700 | [diff] [blame] | 200 | if (image_diff_pid_ >= 0 || zygote_diff_pid_ >= 0) { |
| 201 | if (image_diff_pid_ < 0) { |
| 202 | image_diff_pid_ = zygote_diff_pid_; |
| 203 | zygote_diff_pid_ = -1; |
| 204 | zygote_pid_only_ = true; |
| 205 | } |
| 206 | ret = DumpImageDiff(); |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 207 | os << "\n\n"; |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 208 | } |
| 209 | |
| 210 | os << std::flush; |
| 211 | |
| 212 | return ret; |
| 213 | } |
| 214 | |
| 215 | private: |
David Sehr | 20e271a | 2017-06-14 13:02:14 -0700 | [diff] [blame] | 216 | bool DumpImageDiff() |
Andreas Gampe | bdf7f1c | 2016-08-30 16:38:47 -0700 | [diff] [blame] | 217 | REQUIRES_SHARED(Locks::mutator_lock_) { |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 218 | return DumpImageDiffMap(); |
| 219 | } |
| 220 | |
| 221 | bool ComputeDirtyBytes(const uint8_t* image_begin, |
| 222 | size_t* dirty_pages /*out*/, |
| 223 | size_t* different_pages /*out*/, |
| 224 | size_t* different_bytes /*out*/, |
| 225 | size_t* different_int32s /*out*/, |
| 226 | size_t* private_pages /*out*/, |
| 227 | size_t* private_dirty_pages /*out*/, |
| 228 | std::set<size_t>* dirty_page_set_local) { |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 229 | std::ostream& os = *os_; |
| 230 | |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 231 | size_t virtual_page_idx = 0; // Virtual page number (for an absolute memory address) |
| 232 | size_t page_idx = 0; // Page index relative to 0 |
| 233 | size_t previous_page_idx = 0; // Previous page index relative to 0 |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 234 | |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 235 | |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 236 | // Iterate through one page at a time. Boot map begin/end already implicitly aligned. |
| 237 | for (uintptr_t begin = boot_map_.start; begin != boot_map_.end; begin += kPageSize) { |
| 238 | ptrdiff_t offset = begin - boot_map_.start; |
| 239 | |
| 240 | // We treat the image header as part of the memory map for now |
| 241 | // If we wanted to change this, we could pass base=start+sizeof(ImageHeader) |
| 242 | // But it might still be interesting to see if any of the ImageHeader data mutated |
| 243 | const uint8_t* local_ptr = reinterpret_cast<const uint8_t*>(&image_header_) + offset; |
| 244 | uint8_t* remote_ptr = &remote_contents_[offset]; |
| 245 | |
| 246 | if (memcmp(local_ptr, remote_ptr, kPageSize) != 0) { |
| 247 | different_pages++; |
| 248 | |
| 249 | // Count the number of 32-bit integers that are different. |
| 250 | for (size_t i = 0; i < kPageSize / sizeof(uint32_t); ++i) { |
| 251 | uint32_t* remote_ptr_int32 = reinterpret_cast<uint32_t*>(remote_ptr); |
| 252 | const uint32_t* local_ptr_int32 = reinterpret_cast<const uint32_t*>(local_ptr); |
| 253 | |
| 254 | if (remote_ptr_int32[i] != local_ptr_int32[i]) { |
| 255 | different_int32s++; |
| 256 | } |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 257 | } |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 258 | } |
| 259 | } |
| 260 | |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 261 | // Iterate through one byte at a time. |
| 262 | ptrdiff_t page_off_begin = image_header_.GetImageBegin() - image_begin; |
| 263 | for (uintptr_t begin = boot_map_.start; begin != boot_map_.end; ++begin) { |
| 264 | previous_page_idx = page_idx; |
| 265 | ptrdiff_t offset = begin - boot_map_.start; |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 266 | |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 267 | // We treat the image header as part of the memory map for now |
| 268 | // If we wanted to change this, we could pass base=start+sizeof(ImageHeader) |
| 269 | // But it might still be interesting to see if any of the ImageHeader data mutated |
| 270 | const uint8_t* local_ptr = reinterpret_cast<const uint8_t*>(&image_header_) + offset; |
| 271 | uint8_t* remote_ptr = &remote_contents_[offset]; |
| 272 | |
| 273 | virtual_page_idx = reinterpret_cast<uintptr_t>(local_ptr) / kPageSize; |
| 274 | |
| 275 | // Calculate the page index, relative to the 0th page where the image begins |
| 276 | page_idx = (offset + page_off_begin) / kPageSize; |
| 277 | if (*local_ptr != *remote_ptr) { |
| 278 | // Track number of bytes that are different |
| 279 | different_bytes++; |
| 280 | } |
| 281 | |
| 282 | // Independently count the # of dirty pages on the remote side |
| 283 | size_t remote_virtual_page_idx = begin / kPageSize; |
| 284 | if (previous_page_idx != page_idx) { |
| 285 | uint64_t page_count = 0xC0FFEE; |
| 286 | // TODO: virtual_page_idx needs to be from the same process |
| 287 | std::string error_msg; |
| 288 | int dirtiness = (IsPageDirty(&pagemap_file_, // Image-diff-pid procmap |
| 289 | &clean_pagemap_file_, // Self procmap |
| 290 | &kpageflags_file_, |
| 291 | &kpagecount_file_, |
| 292 | remote_virtual_page_idx, // potentially "dirty" page |
| 293 | virtual_page_idx, // true "clean" page |
| 294 | &page_count, |
| 295 | &error_msg)); |
| 296 | if (dirtiness < 0) { |
| 297 | os << error_msg; |
| 298 | return false; |
| 299 | } else if (dirtiness > 0) { |
| 300 | (*dirty_pages)++; |
| 301 | dirty_page_set_local->insert(dirty_page_set_local->end(), virtual_page_idx); |
| 302 | } |
| 303 | |
| 304 | bool is_dirty = dirtiness > 0; |
| 305 | bool is_private = page_count == 1; |
| 306 | |
| 307 | if (page_count == 1) { |
| 308 | (*private_pages)++; |
| 309 | } |
| 310 | |
| 311 | if (is_dirty && is_private) { |
| 312 | (*private_dirty_pages)++; |
| 313 | } |
| 314 | } |
| 315 | } |
| 316 | return true; |
| 317 | } |
| 318 | |
| 319 | bool ObjectIsOnDirtyPage(const uint8_t* item, |
| 320 | size_t size, |
| 321 | const std::set<size_t>& dirty_page_set_local) { |
| 322 | size_t page_off = 0; |
| 323 | size_t current_page_idx; |
| 324 | uintptr_t object_address = reinterpret_cast<uintptr_t>(item); |
| 325 | // Iterate every page this object belongs to |
| 326 | do { |
| 327 | current_page_idx = object_address / kPageSize + page_off; |
| 328 | |
| 329 | if (dirty_page_set_local.find(current_page_idx) != dirty_page_set_local.end()) { |
| 330 | // This object is on a dirty page |
| 331 | return true; |
| 332 | } |
| 333 | |
| 334 | page_off++; |
| 335 | } while ((current_page_idx * kPageSize) < RoundUp(object_address + size, kObjectAlignment)); |
| 336 | |
| 337 | return false; |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 338 | } |
| 339 | |
Mathieu Chartier | cb044bc | 2016-04-01 13:56:41 -0700 | [diff] [blame] | 340 | static std::string PrettyFieldValue(ArtField* field, mirror::Object* obj) |
Andreas Gampe | bdf7f1c | 2016-08-30 16:38:47 -0700 | [diff] [blame] | 341 | REQUIRES_SHARED(Locks::mutator_lock_) { |
Mathieu Chartier | cb044bc | 2016-04-01 13:56:41 -0700 | [diff] [blame] | 342 | std::ostringstream oss; |
| 343 | switch (field->GetTypeAsPrimitiveType()) { |
| 344 | case Primitive::kPrimNot: { |
| 345 | oss << obj->GetFieldObject<mirror::Object, kVerifyNone, kWithoutReadBarrier>( |
| 346 | field->GetOffset()); |
| 347 | break; |
| 348 | } |
| 349 | case Primitive::kPrimBoolean: { |
| 350 | oss << static_cast<bool>(obj->GetFieldBoolean<kVerifyNone>(field->GetOffset())); |
| 351 | break; |
| 352 | } |
| 353 | case Primitive::kPrimByte: { |
| 354 | oss << static_cast<int32_t>(obj->GetFieldByte<kVerifyNone>(field->GetOffset())); |
| 355 | break; |
| 356 | } |
| 357 | case Primitive::kPrimChar: { |
| 358 | oss << obj->GetFieldChar<kVerifyNone>(field->GetOffset()); |
| 359 | break; |
| 360 | } |
| 361 | case Primitive::kPrimShort: { |
| 362 | oss << obj->GetFieldShort<kVerifyNone>(field->GetOffset()); |
| 363 | break; |
| 364 | } |
| 365 | case Primitive::kPrimInt: { |
| 366 | oss << obj->GetField32<kVerifyNone>(field->GetOffset()); |
| 367 | break; |
| 368 | } |
| 369 | case Primitive::kPrimLong: { |
| 370 | oss << obj->GetField64<kVerifyNone>(field->GetOffset()); |
| 371 | break; |
| 372 | } |
| 373 | case Primitive::kPrimFloat: { |
| 374 | oss << obj->GetField32<kVerifyNone>(field->GetOffset()); |
| 375 | break; |
| 376 | } |
| 377 | case Primitive::kPrimDouble: { |
| 378 | oss << obj->GetField64<kVerifyNone>(field->GetOffset()); |
| 379 | break; |
| 380 | } |
| 381 | case Primitive::kPrimVoid: { |
| 382 | oss << "void"; |
| 383 | break; |
| 384 | } |
| 385 | } |
| 386 | return oss.str(); |
| 387 | } |
| 388 | |
Andreas Gampe | 7ad71d0 | 2016-04-04 13:49:18 -0700 | [diff] [blame] | 389 | // Aggregate and detail class data from an image diff. |
| 390 | struct ClassData { |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 391 | size_t dirty_object_count = 0; |
Andreas Gampe | 7ad71d0 | 2016-04-04 13:49:18 -0700 | [diff] [blame] | 392 | |
| 393 | // Track only the byte-per-byte dirtiness (in bytes) |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 394 | size_t dirty_object_byte_count = 0; |
Andreas Gampe | 7ad71d0 | 2016-04-04 13:49:18 -0700 | [diff] [blame] | 395 | |
| 396 | // Track the object-by-object dirtiness (in bytes) |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 397 | size_t dirty_object_size_in_bytes = 0; |
Andreas Gampe | 7ad71d0 | 2016-04-04 13:49:18 -0700 | [diff] [blame] | 398 | |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 399 | size_t clean_object_count = 0; |
Andreas Gampe | 7ad71d0 | 2016-04-04 13:49:18 -0700 | [diff] [blame] | 400 | |
| 401 | std::string descriptor; |
| 402 | |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 403 | size_t false_dirty_byte_count = 0; |
| 404 | size_t false_dirty_object_count = 0; |
| 405 | std::vector<const uint8_t*> false_dirty_objects; |
Andreas Gampe | 7ad71d0 | 2016-04-04 13:49:18 -0700 | [diff] [blame] | 406 | |
| 407 | // Remote pointers to dirty objects |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 408 | std::vector<const uint8_t*> dirty_objects; |
Andreas Gampe | 7ad71d0 | 2016-04-04 13:49:18 -0700 | [diff] [blame] | 409 | }; |
| 410 | |
Mathieu Chartier | c5196cd | 2016-04-08 14:08:37 -0700 | [diff] [blame] | 411 | void DiffObjectContents(mirror::Object* obj, |
| 412 | uint8_t* remote_bytes, |
Andreas Gampe | bdf7f1c | 2016-08-30 16:38:47 -0700 | [diff] [blame] | 413 | std::ostream& os) REQUIRES_SHARED(Locks::mutator_lock_) { |
Mathieu Chartier | c5196cd | 2016-04-08 14:08:37 -0700 | [diff] [blame] | 414 | const char* tabs = " "; |
| 415 | // Attempt to find fields for all dirty bytes. |
| 416 | mirror::Class* klass = obj->GetClass(); |
| 417 | if (obj->IsClass()) { |
David Sehr | 709b070 | 2016-10-13 09:12:37 -0700 | [diff] [blame] | 418 | os << tabs << "Class " << mirror::Class::PrettyClass(obj->AsClass()) << " " << obj << "\n"; |
Mathieu Chartier | c5196cd | 2016-04-08 14:08:37 -0700 | [diff] [blame] | 419 | } else { |
David Sehr | 709b070 | 2016-10-13 09:12:37 -0700 | [diff] [blame] | 420 | os << tabs << "Instance of " << mirror::Class::PrettyClass(klass) << " " << obj << "\n"; |
Mathieu Chartier | c5196cd | 2016-04-08 14:08:37 -0700 | [diff] [blame] | 421 | } |
| 422 | |
| 423 | std::unordered_set<ArtField*> dirty_instance_fields; |
| 424 | std::unordered_set<ArtField*> dirty_static_fields; |
| 425 | const uint8_t* obj_bytes = reinterpret_cast<const uint8_t*>(obj); |
| 426 | mirror::Object* remote_obj = reinterpret_cast<mirror::Object*>(remote_bytes); |
| 427 | for (size_t i = 0, count = obj->SizeOf(); i < count; ++i) { |
| 428 | if (obj_bytes[i] != remote_bytes[i]) { |
| 429 | ArtField* field = ArtField::FindInstanceFieldWithOffset</*exact*/false>(klass, i); |
| 430 | if (field != nullptr) { |
| 431 | dirty_instance_fields.insert(field); |
| 432 | } else if (obj->IsClass()) { |
| 433 | field = ArtField::FindStaticFieldWithOffset</*exact*/false>(obj->AsClass(), i); |
| 434 | if (field != nullptr) { |
| 435 | dirty_static_fields.insert(field); |
| 436 | } |
| 437 | } |
| 438 | if (field == nullptr) { |
| 439 | if (klass->IsArrayClass()) { |
| 440 | mirror::Class* component_type = klass->GetComponentType(); |
| 441 | Primitive::Type primitive_type = component_type->GetPrimitiveType(); |
| 442 | size_t component_size = Primitive::ComponentSize(primitive_type); |
| 443 | size_t data_offset = mirror::Array::DataOffset(component_size).Uint32Value(); |
| 444 | if (i >= data_offset) { |
| 445 | os << tabs << "Dirty array element " << (i - data_offset) / component_size << "\n"; |
| 446 | // Skip to next element to prevent spam. |
| 447 | i += component_size - 1; |
| 448 | continue; |
| 449 | } |
| 450 | } |
| 451 | os << tabs << "No field for byte offset " << i << "\n"; |
| 452 | } |
| 453 | } |
| 454 | } |
| 455 | // Dump different fields. TODO: Dump field contents. |
| 456 | if (!dirty_instance_fields.empty()) { |
| 457 | os << tabs << "Dirty instance fields " << dirty_instance_fields.size() << "\n"; |
| 458 | for (ArtField* field : dirty_instance_fields) { |
David Sehr | 709b070 | 2016-10-13 09:12:37 -0700 | [diff] [blame] | 459 | os << tabs << ArtField::PrettyField(field) |
Mathieu Chartier | c5196cd | 2016-04-08 14:08:37 -0700 | [diff] [blame] | 460 | << " original=" << PrettyFieldValue(field, obj) |
| 461 | << " remote=" << PrettyFieldValue(field, remote_obj) << "\n"; |
| 462 | } |
| 463 | } |
| 464 | if (!dirty_static_fields.empty()) { |
| 465 | os << tabs << "Dirty static fields " << dirty_static_fields.size() << "\n"; |
| 466 | for (ArtField* field : dirty_static_fields) { |
David Sehr | 709b070 | 2016-10-13 09:12:37 -0700 | [diff] [blame] | 467 | os << tabs << ArtField::PrettyField(field) |
Mathieu Chartier | c5196cd | 2016-04-08 14:08:37 -0700 | [diff] [blame] | 468 | << " original=" << PrettyFieldValue(field, obj) |
| 469 | << " remote=" << PrettyFieldValue(field, remote_obj) << "\n"; |
| 470 | } |
| 471 | } |
| 472 | os << "\n"; |
| 473 | } |
| 474 | |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 475 | struct ObjectRegionData { |
| 476 | // Count of objects that are different. |
| 477 | size_t different_objects = 0; |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 478 | |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 479 | // Local objects that are dirty (differ in at least one byte). |
| 480 | size_t dirty_object_bytes = 0; |
| 481 | std::vector<const uint8_t*>* dirty_objects; |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 482 | |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 483 | // Local objects that are clean, but located on dirty pages. |
| 484 | size_t false_dirty_object_bytes = 0; |
| 485 | std::vector<const uint8_t*> false_dirty_objects; |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 486 | |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 487 | // Image dirty objects |
| 488 | // If zygote_pid_only_ == true, these are shared dirty objects in the zygote. |
| 489 | // If zygote_pid_only_ == false, these are private dirty objects in the application. |
| 490 | std::set<const uint8_t*> image_dirty_objects; |
| 491 | |
| 492 | // Zygote dirty objects (probably private dirty). |
| 493 | // We only add objects here if they differed in both the image and the zygote, so |
| 494 | // they are probably private dirty. |
| 495 | std::set<const uint8_t*> zygote_dirty_objects; |
| 496 | |
| 497 | std::map<off_t /* field offset */, size_t /* count */> field_dirty_count; |
| 498 | }; |
| 499 | |
| 500 | void ComputeObjectDirty(const uint8_t* current, |
| 501 | const uint8_t* current_remote, |
| 502 | const uint8_t* current_zygote, |
| 503 | ClassData* obj_class_data, |
| 504 | size_t obj_size, |
| 505 | const std::set<size_t>& dirty_page_set_local, |
| 506 | ObjectRegionData* region_data /*out*/) { |
| 507 | bool different_image_object = memcmp(current, current_remote, obj_size) != 0; |
| 508 | if (different_image_object) { |
| 509 | bool different_zygote_object = false; |
| 510 | if (!zygote_contents_.empty()) { |
| 511 | different_zygote_object = memcmp(current, current_zygote, obj_size) != 0; |
| 512 | } |
| 513 | if (different_zygote_object) { |
| 514 | // Different from zygote. |
| 515 | region_data->zygote_dirty_objects.insert(current); |
| 516 | } else { |
| 517 | // Just different from image. |
| 518 | region_data->image_dirty_objects.insert(current); |
| 519 | } |
| 520 | |
| 521 | ++region_data->different_objects; |
| 522 | region_data->dirty_object_bytes += obj_size; |
| 523 | |
| 524 | ++obj_class_data->dirty_object_count; |
| 525 | |
| 526 | // Go byte-by-byte and figure out what exactly got dirtied |
| 527 | size_t dirty_byte_count_per_object = 0; |
| 528 | for (size_t i = 0; i < obj_size; ++i) { |
| 529 | if (current[i] != current_remote[i]) { |
| 530 | dirty_byte_count_per_object++; |
| 531 | } |
| 532 | } |
| 533 | obj_class_data->dirty_object_byte_count += dirty_byte_count_per_object; |
| 534 | obj_class_data->dirty_object_size_in_bytes += obj_size; |
| 535 | obj_class_data->dirty_objects.push_back(current_remote); |
| 536 | } else { |
| 537 | ++obj_class_data->clean_object_count; |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 538 | } |
| 539 | |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 540 | if (different_image_object) { |
| 541 | if (region_data->dirty_objects != nullptr) { |
| 542 | // print the fields that are dirty |
| 543 | for (size_t i = 0; i < obj_size; ++i) { |
| 544 | if (current[i] != current_remote[i]) { |
| 545 | region_data->field_dirty_count[i]++; |
| 546 | } |
| 547 | } |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 548 | |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 549 | region_data->dirty_objects->push_back(current); |
| 550 | } |
| 551 | /* |
| 552 | * TODO: Resurrect this stuff in the client when we add ArtMethod iterator. |
| 553 | } else { |
| 554 | std::string descriptor = GetClassDescriptor(klass); |
| 555 | if (strcmp(descriptor.c_str(), "Ljava/lang/reflect/ArtMethod;") == 0) { |
| 556 | // this is an ArtMethod |
| 557 | ArtMethod* art_method = reinterpret_cast<ArtMethod*>(remote_obj); |
| 558 | |
| 559 | // print the fields that are dirty |
| 560 | for (size_t i = 0; i < obj_size; ++i) { |
| 561 | if (current[i] != current_remote[i]) { |
| 562 | art_method_field_dirty_count[i]++; |
| 563 | } |
| 564 | } |
| 565 | |
| 566 | art_method_dirty_objects.push_back(art_method); |
| 567 | } |
| 568 | } |
| 569 | */ |
| 570 | } else if (ObjectIsOnDirtyPage(current, obj_size, dirty_page_set_local)) { |
| 571 | // This object was either never mutated or got mutated back to the same value. |
| 572 | // TODO: Do I want to distinguish a "different" vs a "dirty" page here? |
| 573 | region_data->false_dirty_objects.push_back(current); |
| 574 | obj_class_data->false_dirty_objects.push_back(current); |
| 575 | region_data->false_dirty_object_bytes += obj_size; |
| 576 | obj_class_data->false_dirty_byte_count += obj_size; |
| 577 | obj_class_data->false_dirty_object_count += 1; |
| 578 | } |
| 579 | } |
| 580 | |
| 581 | // Look at /proc/$pid/mem and only diff the things from there |
| 582 | bool DumpImageDiffMap() |
| 583 | REQUIRES_SHARED(Locks::mutator_lock_) { |
| 584 | std::ostream& os = *os_; |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 585 | std::string error_msg; |
| 586 | |
| 587 | // Walk the bytes and diff against our boot image |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 588 | os << "\nObserving boot image header at address " |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 589 | << reinterpret_cast<const void*>(&image_header_) |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 590 | << "\n\n"; |
| 591 | |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 592 | const uint8_t* image_begin_unaligned = image_header_.GetImageBegin(); |
Mathieu Chartier | c785344 | 2015-03-27 14:35:38 -0700 | [diff] [blame] | 593 | const uint8_t* image_mirror_end_unaligned = image_begin_unaligned + |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 594 | image_header_.GetImageSection(ImageHeader::kSectionObjects).Size(); |
| 595 | const uint8_t* image_end_unaligned = image_begin_unaligned + image_header_.GetImageSize(); |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 596 | |
| 597 | // Adjust range to nearest page |
| 598 | const uint8_t* image_begin = AlignDown(image_begin_unaligned, kPageSize); |
| 599 | const uint8_t* image_end = AlignUp(image_end_unaligned, kPageSize); |
| 600 | |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 601 | if (reinterpret_cast<uintptr_t>(image_begin) > boot_map_.start || |
| 602 | reinterpret_cast<uintptr_t>(image_end) < boot_map_.end) { |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 603 | // Sanity check that we aren't trying to read a completely different boot image |
| 604 | os << "Remote boot map is out of range of local boot map: " << |
| 605 | "local begin " << reinterpret_cast<const void*>(image_begin) << |
| 606 | ", local end " << reinterpret_cast<const void*>(image_end) << |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 607 | ", remote begin " << reinterpret_cast<const void*>(boot_map_.start) << |
| 608 | ", remote end " << reinterpret_cast<const void*>(boot_map_.end); |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 609 | return false; |
| 610 | // If we wanted even more validation we could map the ImageHeader from the file |
| 611 | } |
| 612 | |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 613 | size_t dirty_pages = 0; |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 614 | size_t different_pages = 0; |
| 615 | size_t different_bytes = 0; |
| 616 | size_t different_int32s = 0; |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 617 | size_t private_pages = 0; |
| 618 | size_t private_dirty_pages = 0; |
| 619 | |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 620 | // Set of the local virtual page indices that are dirty |
| 621 | std::set<size_t> dirty_page_set_local; |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 622 | |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 623 | if (!ComputeDirtyBytes(image_begin, |
| 624 | &dirty_pages, |
| 625 | &different_pages, |
| 626 | &different_bytes, |
| 627 | &different_int32s, |
| 628 | &private_pages, |
| 629 | &private_dirty_pages, |
| 630 | &dirty_page_set_local)) { |
| 631 | return false; |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 632 | } |
| 633 | |
Andreas Gampe | 7ad71d0 | 2016-04-04 13:49:18 -0700 | [diff] [blame] | 634 | std::map<mirror::Class*, ClassData> class_data; |
| 635 | |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 636 | // Walk each object in the remote image space and compare it against ours |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 637 | std::map<off_t /* field offset */, int /* count */> art_method_field_dirty_count; |
Mathieu Chartier | e401d14 | 2015-04-22 13:56:20 -0700 | [diff] [blame] | 638 | std::vector<ArtMethod*> art_method_dirty_objects; |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 639 | |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 640 | std::map<off_t /* field offset */, size_t /* count */> class_field_dirty_count; |
| 641 | std::vector<const uint8_t*> class_dirty_objects; |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 642 | |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 643 | |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 644 | // Look up remote classes by their descriptor |
| 645 | std::map<std::string, mirror::Class*> remote_class_map; |
| 646 | // Look up local classes by their descriptor |
| 647 | std::map<std::string, mirror::Class*> local_class_map; |
| 648 | |
Mathieu Chartier | cb044bc | 2016-04-01 13:56:41 -0700 | [diff] [blame] | 649 | const uint8_t* begin_image_ptr = image_begin_unaligned; |
| 650 | const uint8_t* end_image_ptr = image_mirror_end_unaligned; |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 651 | |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 652 | ObjectRegionData region_data; |
| 653 | |
Mathieu Chartier | cb044bc | 2016-04-01 13:56:41 -0700 | [diff] [blame] | 654 | const uint8_t* current = begin_image_ptr + RoundUp(sizeof(ImageHeader), kObjectAlignment); |
| 655 | while (reinterpret_cast<uintptr_t>(current) < reinterpret_cast<uintptr_t>(end_image_ptr)) { |
| 656 | CHECK_ALIGNED(current, kObjectAlignment); |
| 657 | mirror::Object* obj = reinterpret_cast<mirror::Object*>(const_cast<uint8_t*>(current)); |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 658 | |
Mathieu Chartier | cb044bc | 2016-04-01 13:56:41 -0700 | [diff] [blame] | 659 | // Sanity check that we are reading a real object |
| 660 | CHECK(obj->GetClass() != nullptr) << "Image object at address " << obj << " has null class"; |
Hiroshi Yamauchi | 12b58b2 | 2016-11-01 11:55:29 -0700 | [diff] [blame] | 661 | if (kUseBakerReadBarrier) { |
| 662 | obj->AssertReadBarrierState(); |
Mathieu Chartier | cb044bc | 2016-04-01 13:56:41 -0700 | [diff] [blame] | 663 | } |
| 664 | |
Mathieu Chartier | cb044bc | 2016-04-01 13:56:41 -0700 | [diff] [blame] | 665 | mirror::Class* klass = obj->GetClass(); |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 666 | size_t obj_size = obj->SizeOf(); |
| 667 | ClassData& obj_class_data = class_data[klass]; |
Mathieu Chartier | cb044bc | 2016-04-01 13:56:41 -0700 | [diff] [blame] | 668 | |
Mathieu Chartier | cb044bc | 2016-04-01 13:56:41 -0700 | [diff] [blame] | 669 | // Check against the other object and see if they are different |
| 670 | ptrdiff_t offset = current - begin_image_ptr; |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 671 | const uint8_t* current_remote = &remote_contents_[offset]; |
| 672 | const uint8_t* current_zygote = |
| 673 | zygote_contents_.empty() ? nullptr : &zygote_contents_[offset]; |
Mathieu Chartier | c5196cd | 2016-04-08 14:08:37 -0700 | [diff] [blame] | 674 | |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 675 | std::map<off_t /* field offset */, size_t /* count */>* field_dirty_count = nullptr; |
| 676 | if (klass->IsClassClass()) { |
| 677 | field_dirty_count = &class_field_dirty_count; |
Mathieu Chartier | cb044bc | 2016-04-01 13:56:41 -0700 | [diff] [blame] | 678 | } |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 679 | |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 680 | ComputeObjectDirty(current, |
| 681 | current_remote, |
| 682 | current_zygote, |
| 683 | &obj_class_data, |
| 684 | obj_size, |
| 685 | dirty_page_set_local, |
| 686 | ®ion_data); |
| 687 | |
| 688 | // Object specific stuff. |
Mathieu Chartier | cb044bc | 2016-04-01 13:56:41 -0700 | [diff] [blame] | 689 | std::string descriptor = GetClassDescriptor(klass); |
Mathieu Chartier | cb044bc | 2016-04-01 13:56:41 -0700 | [diff] [blame] | 690 | if (strcmp(descriptor.c_str(), "Ljava/lang/Class;") == 0) { |
| 691 | local_class_map[descriptor] = reinterpret_cast<mirror::Class*>(obj); |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 692 | mirror::Object* remote_obj = reinterpret_cast<mirror::Object*>( |
| 693 | const_cast<uint8_t*>(current_remote)); |
Mathieu Chartier | cb044bc | 2016-04-01 13:56:41 -0700 | [diff] [blame] | 694 | remote_class_map[descriptor] = reinterpret_cast<mirror::Class*>(remote_obj); |
| 695 | } |
| 696 | |
| 697 | // Unconditionally store the class descriptor in case we need it later |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 698 | obj_class_data.descriptor = descriptor; |
| 699 | |
| 700 | current += RoundUp(obj_size, kObjectAlignment); |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 701 | } |
| 702 | |
| 703 | // Looking at only dirty pages, figure out how many of those bytes belong to dirty objects. |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 704 | float true_dirtied_percent = region_data.dirty_object_bytes * 1.0f / (dirty_pages * kPageSize); |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 705 | size_t false_dirty_pages = dirty_pages - different_pages; |
| 706 | |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 707 | os << "Mapping at [" << reinterpret_cast<void*>(boot_map_.start) << ", " |
| 708 | << reinterpret_cast<void*>(boot_map_.end) << ") had: \n " |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 709 | << different_bytes << " differing bytes, \n " |
| 710 | << different_int32s << " differing int32s, \n " |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 711 | << region_data.different_objects << " different objects, \n " |
| 712 | << region_data.dirty_object_bytes << " different object [bytes], \n " |
| 713 | << region_data.false_dirty_objects.size() << " false dirty objects,\n " |
| 714 | << region_data.false_dirty_object_bytes << " false dirty object [bytes], \n " |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 715 | << true_dirtied_percent << " different objects-vs-total in a dirty page;\n " |
| 716 | << different_pages << " different pages; \n " |
| 717 | << dirty_pages << " pages are dirty; \n " |
| 718 | << false_dirty_pages << " pages are false dirty; \n " |
| 719 | << private_pages << " pages are private; \n " |
| 720 | << private_dirty_pages << " pages are Private_Dirty\n " |
| 721 | << ""; |
| 722 | |
| 723 | // vector of pairs (int count, Class*) |
Andreas Gampe | 7ad71d0 | 2016-04-04 13:49:18 -0700 | [diff] [blame] | 724 | auto dirty_object_class_values = SortByValueDesc<mirror::Class*, int, ClassData>( |
| 725 | class_data, [](const ClassData& d) { return d.dirty_object_count; }); |
| 726 | auto clean_object_class_values = SortByValueDesc<mirror::Class*, int, ClassData>( |
| 727 | class_data, [](const ClassData& d) { return d.clean_object_count; }); |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 728 | |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 729 | if (!region_data.zygote_dirty_objects.empty()) { |
David Sehr | 20e271a | 2017-06-14 13:02:14 -0700 | [diff] [blame] | 730 | // We only reach this point if both pids were specified. Furthermore, |
| 731 | // objects are only displayed here if they differed in both the image |
| 732 | // and the zygote, so they are probably private dirty. |
| 733 | CHECK(image_diff_pid_ > 0 && zygote_diff_pid_ > 0); |
| 734 | os << "\n" << " Zygote dirty objects (probably shared dirty): " |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 735 | << region_data.zygote_dirty_objects.size() << "\n"; |
| 736 | for (const uint8_t* obj_bytes : region_data.zygote_dirty_objects) { |
| 737 | auto obj = const_cast<mirror::Object*>(reinterpret_cast<const mirror::Object*>(obj_bytes)); |
Mathieu Chartier | c5196cd | 2016-04-08 14:08:37 -0700 | [diff] [blame] | 738 | ptrdiff_t offset = obj_bytes - begin_image_ptr; |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 739 | uint8_t* remote_bytes = &zygote_contents_[offset]; |
Mathieu Chartier | c5196cd | 2016-04-08 14:08:37 -0700 | [diff] [blame] | 740 | DiffObjectContents(obj, remote_bytes, os); |
Mathieu Chartier | cb044bc | 2016-04-01 13:56:41 -0700 | [diff] [blame] | 741 | } |
Mathieu Chartier | c5196cd | 2016-04-08 14:08:37 -0700 | [diff] [blame] | 742 | } |
David Sehr | 20e271a | 2017-06-14 13:02:14 -0700 | [diff] [blame] | 743 | os << "\n"; |
| 744 | if (zygote_pid_only_) { |
David Sehr | 41d8eee | 2017-06-15 11:11:32 -0700 | [diff] [blame] | 745 | // image_diff_pid_ is the zygote process. |
| 746 | os << " Zygote shared dirty objects: "; |
David Sehr | 20e271a | 2017-06-14 13:02:14 -0700 | [diff] [blame] | 747 | } else { |
David Sehr | 41d8eee | 2017-06-15 11:11:32 -0700 | [diff] [blame] | 748 | // image_diff_pid_ is actually the image (application) process. |
| 749 | if (zygote_diff_pid_ > 0) { |
| 750 | os << " Application dirty objects (private dirty): "; |
| 751 | } else { |
| 752 | os << " Application dirty objects (unknown whether private or shared dirty): "; |
| 753 | } |
David Sehr | 20e271a | 2017-06-14 13:02:14 -0700 | [diff] [blame] | 754 | } |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 755 | os << region_data.image_dirty_objects.size() << "\n"; |
| 756 | for (const uint8_t* obj_bytes : region_data.image_dirty_objects) { |
| 757 | auto obj = const_cast<mirror::Object*>(reinterpret_cast<const mirror::Object*>(obj_bytes)); |
Mathieu Chartier | cb044bc | 2016-04-01 13:56:41 -0700 | [diff] [blame] | 758 | ptrdiff_t offset = obj_bytes - begin_image_ptr; |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 759 | uint8_t* remote_bytes = &remote_contents_[offset]; |
Mathieu Chartier | c5196cd | 2016-04-08 14:08:37 -0700 | [diff] [blame] | 760 | DiffObjectContents(obj, remote_bytes, os); |
Mathieu Chartier | cb044bc | 2016-04-01 13:56:41 -0700 | [diff] [blame] | 761 | } |
| 762 | |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 763 | os << "\n" << " Dirty object count by class:\n"; |
| 764 | for (const auto& vk_pair : dirty_object_class_values) { |
| 765 | int dirty_object_count = vk_pair.first; |
| 766 | mirror::Class* klass = vk_pair.second; |
Andreas Gampe | 7ad71d0 | 2016-04-04 13:49:18 -0700 | [diff] [blame] | 767 | int object_sizes = class_data[klass].dirty_object_size_in_bytes; |
| 768 | float avg_dirty_bytes_per_class = |
| 769 | class_data[klass].dirty_object_byte_count * 1.0f / object_sizes; |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 770 | float avg_object_size = object_sizes * 1.0f / dirty_object_count; |
Andreas Gampe | 7ad71d0 | 2016-04-04 13:49:18 -0700 | [diff] [blame] | 771 | const std::string& descriptor = class_data[klass].descriptor; |
David Sehr | 709b070 | 2016-10-13 09:12:37 -0700 | [diff] [blame] | 772 | os << " " << mirror::Class::PrettyClass(klass) << " (" |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 773 | << "objects: " << dirty_object_count << ", " |
| 774 | << "avg dirty bytes: " << avg_dirty_bytes_per_class << ", " |
| 775 | << "avg object size: " << avg_object_size << ", " |
| 776 | << "class descriptor: '" << descriptor << "'" |
| 777 | << ")\n"; |
| 778 | |
| 779 | constexpr size_t kMaxAddressPrint = 5; |
| 780 | if (strcmp(descriptor.c_str(), "Ljava/lang/reflect/ArtMethod;") == 0) { |
| 781 | os << " sample object addresses: "; |
| 782 | for (size_t i = 0; i < art_method_dirty_objects.size() && i < kMaxAddressPrint; ++i) { |
| 783 | auto art_method = art_method_dirty_objects[i]; |
| 784 | |
| 785 | os << reinterpret_cast<void*>(art_method) << ", "; |
| 786 | } |
| 787 | os << "\n"; |
| 788 | |
| 789 | os << " dirty byte +offset:count list = "; |
Andreas Gampe | 7ad71d0 | 2016-04-04 13:49:18 -0700 | [diff] [blame] | 790 | auto art_method_field_dirty_count_sorted = |
| 791 | SortByValueDesc<off_t, int, int>(art_method_field_dirty_count); |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 792 | for (auto pair : art_method_field_dirty_count_sorted) { |
| 793 | off_t offset = pair.second; |
| 794 | int count = pair.first; |
| 795 | |
| 796 | os << "+" << offset << ":" << count << ", "; |
| 797 | } |
| 798 | |
| 799 | os << "\n"; |
| 800 | |
| 801 | os << " field contents:\n"; |
Andreas Gampe | 7ad71d0 | 2016-04-04 13:49:18 -0700 | [diff] [blame] | 802 | const auto& dirty_objects_list = class_data[klass].dirty_objects; |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 803 | for (const uint8_t* uobj : dirty_objects_list) { |
| 804 | auto obj = const_cast<mirror::Object*>(reinterpret_cast<const mirror::Object*>(uobj)); |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 805 | // remote method |
Mathieu Chartier | e401d14 | 2015-04-22 13:56:20 -0700 | [diff] [blame] | 806 | auto art_method = reinterpret_cast<ArtMethod*>(obj); |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 807 | |
| 808 | // remote class |
| 809 | mirror::Class* remote_declaring_class = |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 810 | FixUpRemotePointer(art_method->GetDeclaringClass(), remote_contents_, boot_map_); |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 811 | |
| 812 | // local class |
| 813 | mirror::Class* declaring_class = |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 814 | RemoteContentsPointerToLocal(remote_declaring_class, remote_contents_, image_header_); |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 815 | |
| 816 | os << " " << reinterpret_cast<void*>(obj) << " "; |
| 817 | os << " entryPointFromJni: " |
| 818 | << reinterpret_cast<const void*>( |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 819 | art_method->GetDataPtrSize(pointer_size_)) << ", "; |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 820 | os << " entryPointFromQuickCompiledCode: " |
| 821 | << reinterpret_cast<const void*>( |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 822 | art_method->GetEntryPointFromQuickCompiledCodePtrSize(pointer_size_)) |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 823 | << ", "; |
| 824 | os << " isNative? " << (art_method->IsNative() ? "yes" : "no") << ", "; |
| 825 | os << " class_status (local): " << declaring_class->GetStatus(); |
| 826 | os << " class_status (remote): " << remote_declaring_class->GetStatus(); |
| 827 | os << "\n"; |
| 828 | } |
| 829 | } |
| 830 | if (strcmp(descriptor.c_str(), "Ljava/lang/Class;") == 0) { |
| 831 | os << " sample object addresses: "; |
| 832 | for (size_t i = 0; i < class_dirty_objects.size() && i < kMaxAddressPrint; ++i) { |
| 833 | auto class_ptr = class_dirty_objects[i]; |
| 834 | |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 835 | os << reinterpret_cast<const void*>(class_ptr) << ", "; |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 836 | } |
| 837 | os << "\n"; |
| 838 | |
| 839 | os << " dirty byte +offset:count list = "; |
Andreas Gampe | 7ad71d0 | 2016-04-04 13:49:18 -0700 | [diff] [blame] | 840 | auto class_field_dirty_count_sorted = |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 841 | SortByValueDesc<off_t, int, size_t>(class_field_dirty_count); |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 842 | for (auto pair : class_field_dirty_count_sorted) { |
| 843 | off_t offset = pair.second; |
| 844 | int count = pair.first; |
| 845 | |
| 846 | os << "+" << offset << ":" << count << ", "; |
| 847 | } |
| 848 | os << "\n"; |
| 849 | |
| 850 | os << " field contents:\n"; |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 851 | // TODO: templatize this to avoid the awful casts down to uint8_t* and back. |
Andreas Gampe | 7ad71d0 | 2016-04-04 13:49:18 -0700 | [diff] [blame] | 852 | const auto& dirty_objects_list = class_data[klass].dirty_objects; |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 853 | for (const uint8_t* uobj : dirty_objects_list) { |
| 854 | auto obj = const_cast<mirror::Object*>(reinterpret_cast<const mirror::Object*>(uobj)); |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 855 | // remote class object |
| 856 | auto remote_klass = reinterpret_cast<mirror::Class*>(obj); |
| 857 | |
| 858 | // local class object |
| 859 | auto local_klass = RemoteContentsPointerToLocal(remote_klass, |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 860 | remote_contents_, |
| 861 | image_header_); |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 862 | |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 863 | os << " " << reinterpret_cast<const void*>(obj) << " "; |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 864 | os << " class_status (remote): " << remote_klass->GetStatus() << ", "; |
| 865 | os << " class_status (local): " << local_klass->GetStatus(); |
| 866 | os << "\n"; |
| 867 | } |
| 868 | } |
| 869 | } |
| 870 | |
Andreas Gampe | 7ad71d0 | 2016-04-04 13:49:18 -0700 | [diff] [blame] | 871 | auto false_dirty_object_class_values = SortByValueDesc<mirror::Class*, int, ClassData>( |
| 872 | class_data, [](const ClassData& d) { return d.false_dirty_object_count; }); |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 873 | |
| 874 | os << "\n" << " False-dirty object count by class:\n"; |
| 875 | for (const auto& vk_pair : false_dirty_object_class_values) { |
| 876 | int object_count = vk_pair.first; |
| 877 | mirror::Class* klass = vk_pair.second; |
Andreas Gampe | 7ad71d0 | 2016-04-04 13:49:18 -0700 | [diff] [blame] | 878 | int object_sizes = class_data[klass].false_dirty_byte_count; |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 879 | float avg_object_size = object_sizes * 1.0f / object_count; |
Andreas Gampe | 7ad71d0 | 2016-04-04 13:49:18 -0700 | [diff] [blame] | 880 | const std::string& descriptor = class_data[klass].descriptor; |
David Sehr | 709b070 | 2016-10-13 09:12:37 -0700 | [diff] [blame] | 881 | os << " " << mirror::Class::PrettyClass(klass) << " (" |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 882 | << "objects: " << object_count << ", " |
| 883 | << "avg object size: " << avg_object_size << ", " |
| 884 | << "total bytes: " << object_sizes << ", " |
| 885 | << "class descriptor: '" << descriptor << "'" |
| 886 | << ")\n"; |
| 887 | |
| 888 | if (strcmp(descriptor.c_str(), "Ljava/lang/reflect/ArtMethod;") == 0) { |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 889 | // TODO: templatize this to avoid the awful casts down to uint8_t* and back. |
Andreas Gampe | 7ad71d0 | 2016-04-04 13:49:18 -0700 | [diff] [blame] | 890 | auto& art_method_false_dirty_objects = class_data[klass].false_dirty_objects; |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 891 | |
| 892 | os << " field contents:\n"; |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 893 | for (const uint8_t* uobj : art_method_false_dirty_objects) { |
| 894 | auto obj = const_cast<mirror::Object*>(reinterpret_cast<const mirror::Object*>(uobj)); |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 895 | // local method |
Mathieu Chartier | e401d14 | 2015-04-22 13:56:20 -0700 | [diff] [blame] | 896 | auto art_method = reinterpret_cast<ArtMethod*>(obj); |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 897 | |
| 898 | // local class |
| 899 | mirror::Class* declaring_class = art_method->GetDeclaringClass(); |
| 900 | |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 901 | os << " " << reinterpret_cast<const void*>(obj) << " "; |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 902 | os << " entryPointFromJni: " |
| 903 | << reinterpret_cast<const void*>( |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 904 | art_method->GetDataPtrSize(pointer_size_)) << ", "; |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 905 | os << " entryPointFromQuickCompiledCode: " |
| 906 | << reinterpret_cast<const void*>( |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 907 | art_method->GetEntryPointFromQuickCompiledCodePtrSize(pointer_size_)) |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 908 | << ", "; |
| 909 | os << " isNative? " << (art_method->IsNative() ? "yes" : "no") << ", "; |
| 910 | os << " class_status (local): " << declaring_class->GetStatus(); |
| 911 | os << "\n"; |
| 912 | } |
| 913 | } |
| 914 | } |
| 915 | |
| 916 | os << "\n" << " Clean object count by class:\n"; |
| 917 | for (const auto& vk_pair : clean_object_class_values) { |
David Sehr | 709b070 | 2016-10-13 09:12:37 -0700 | [diff] [blame] | 918 | os << " " << mirror::Class::PrettyClass(vk_pair.second) << " (" << vk_pair.first << ")\n"; |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 919 | } |
| 920 | |
| 921 | return true; |
| 922 | } |
| 923 | |
| 924 | // Fixup a remote pointer that we read from a foreign boot.art to point to our own memory. |
| 925 | // Returned pointer will point to inside of remote_contents. |
| 926 | template <typename T> |
| 927 | static T* FixUpRemotePointer(T* remote_ptr, |
| 928 | std::vector<uint8_t>& remote_contents, |
| 929 | const backtrace_map_t& boot_map) { |
| 930 | if (remote_ptr == nullptr) { |
| 931 | return nullptr; |
| 932 | } |
| 933 | |
| 934 | uintptr_t remote = reinterpret_cast<uintptr_t>(remote_ptr); |
| 935 | |
| 936 | CHECK_LE(boot_map.start, remote); |
| 937 | CHECK_GT(boot_map.end, remote); |
| 938 | |
| 939 | off_t boot_offset = remote - boot_map.start; |
| 940 | |
| 941 | return reinterpret_cast<T*>(&remote_contents[boot_offset]); |
| 942 | } |
| 943 | |
| 944 | template <typename T> |
| 945 | static T* RemoteContentsPointerToLocal(T* remote_ptr, |
| 946 | std::vector<uint8_t>& remote_contents, |
| 947 | const ImageHeader& image_header) { |
| 948 | if (remote_ptr == nullptr) { |
| 949 | return nullptr; |
| 950 | } |
| 951 | |
| 952 | uint8_t* remote = reinterpret_cast<uint8_t*>(remote_ptr); |
| 953 | ptrdiff_t boot_offset = remote - &remote_contents[0]; |
| 954 | |
| 955 | const uint8_t* local_ptr = reinterpret_cast<const uint8_t*>(&image_header) + boot_offset; |
| 956 | |
| 957 | return reinterpret_cast<T*>(const_cast<uint8_t*>(local_ptr)); |
| 958 | } |
| 959 | |
| 960 | static std::string GetClassDescriptor(mirror::Class* klass) |
Andreas Gampe | bdf7f1c | 2016-08-30 16:38:47 -0700 | [diff] [blame] | 961 | REQUIRES_SHARED(Locks::mutator_lock_) { |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 962 | CHECK(klass != nullptr); |
| 963 | |
| 964 | std::string descriptor; |
| 965 | const char* descriptor_str = klass->GetDescriptor(&descriptor); |
| 966 | |
| 967 | return std::string(descriptor_str); |
| 968 | } |
| 969 | |
Andreas Gampe | 7ad71d0 | 2016-04-04 13:49:18 -0700 | [diff] [blame] | 970 | template <typename K, typename V, typename D> |
| 971 | static std::vector<std::pair<V, K>> SortByValueDesc( |
| 972 | const std::map<K, D> map, |
| 973 | std::function<V(const D&)> value_mapper = [](const D& d) { return static_cast<V>(d); }) { |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 974 | // Store value->key so that we can use the default sort from pair which |
| 975 | // sorts by value first and then key |
| 976 | std::vector<std::pair<V, K>> value_key_vector; |
| 977 | |
| 978 | for (const auto& kv_pair : map) { |
Andreas Gampe | 7ad71d0 | 2016-04-04 13:49:18 -0700 | [diff] [blame] | 979 | value_key_vector.push_back(std::make_pair(value_mapper(kv_pair.second), kv_pair.first)); |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 980 | } |
| 981 | |
| 982 | // Sort in reverse (descending order) |
| 983 | std::sort(value_key_vector.rbegin(), value_key_vector.rend()); |
| 984 | return value_key_vector; |
| 985 | } |
| 986 | |
| 987 | static bool GetPageFrameNumber(File* page_map_file, |
| 988 | size_t virtual_page_index, |
| 989 | uint64_t* page_frame_number, |
| 990 | std::string* error_msg) { |
| 991 | CHECK(page_map_file != nullptr); |
| 992 | CHECK(page_frame_number != nullptr); |
| 993 | CHECK(error_msg != nullptr); |
| 994 | |
| 995 | constexpr size_t kPageMapEntrySize = sizeof(uint64_t); |
| 996 | constexpr uint64_t kPageFrameNumberMask = (1ULL << 55) - 1; // bits 0-54 [in /proc/$pid/pagemap] |
| 997 | constexpr uint64_t kPageSoftDirtyMask = (1ULL << 55); // bit 55 [in /proc/$pid/pagemap] |
| 998 | |
| 999 | uint64_t page_map_entry = 0; |
| 1000 | |
| 1001 | // Read 64-bit entry from /proc/$pid/pagemap to get the physical page frame number |
| 1002 | if (!page_map_file->PreadFully(&page_map_entry, kPageMapEntrySize, |
| 1003 | virtual_page_index * kPageMapEntrySize)) { |
| 1004 | *error_msg = StringPrintf("Failed to read the virtual page index entry from %s", |
| 1005 | page_map_file->GetPath().c_str()); |
| 1006 | return false; |
| 1007 | } |
| 1008 | |
| 1009 | // TODO: seems useless, remove this. |
| 1010 | bool soft_dirty = (page_map_entry & kPageSoftDirtyMask) != 0; |
| 1011 | if ((false)) { |
| 1012 | LOG(VERBOSE) << soft_dirty; // Suppress unused warning |
| 1013 | UNREACHABLE(); |
| 1014 | } |
| 1015 | |
| 1016 | *page_frame_number = page_map_entry & kPageFrameNumberMask; |
| 1017 | |
| 1018 | return true; |
| 1019 | } |
| 1020 | |
| 1021 | static int IsPageDirty(File* page_map_file, |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 1022 | File* clean_pagemap_file, |
| 1023 | File* kpageflags_file, |
| 1024 | File* kpagecount_file, |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 1025 | size_t virtual_page_idx, |
| 1026 | size_t clean_virtual_page_idx, |
| 1027 | // Out parameters: |
| 1028 | uint64_t* page_count, std::string* error_msg) { |
| 1029 | CHECK(page_map_file != nullptr); |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 1030 | CHECK(clean_pagemap_file != nullptr); |
| 1031 | CHECK_NE(page_map_file, clean_pagemap_file); |
| 1032 | CHECK(kpageflags_file != nullptr); |
| 1033 | CHECK(kpagecount_file != nullptr); |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 1034 | CHECK(page_count != nullptr); |
| 1035 | CHECK(error_msg != nullptr); |
| 1036 | |
| 1037 | // Constants are from https://www.kernel.org/doc/Documentation/vm/pagemap.txt |
| 1038 | |
| 1039 | constexpr size_t kPageFlagsEntrySize = sizeof(uint64_t); |
| 1040 | constexpr size_t kPageCountEntrySize = sizeof(uint64_t); |
| 1041 | constexpr uint64_t kPageFlagsDirtyMask = (1ULL << 4); // in /proc/kpageflags |
| 1042 | constexpr uint64_t kPageFlagsNoPageMask = (1ULL << 20); // in /proc/kpageflags |
| 1043 | constexpr uint64_t kPageFlagsMmapMask = (1ULL << 11); // in /proc/kpageflags |
| 1044 | |
| 1045 | uint64_t page_frame_number = 0; |
| 1046 | if (!GetPageFrameNumber(page_map_file, virtual_page_idx, &page_frame_number, error_msg)) { |
| 1047 | return -1; |
| 1048 | } |
| 1049 | |
| 1050 | uint64_t page_frame_number_clean = 0; |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 1051 | if (!GetPageFrameNumber(clean_pagemap_file, clean_virtual_page_idx, &page_frame_number_clean, |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 1052 | error_msg)) { |
| 1053 | return -1; |
| 1054 | } |
| 1055 | |
| 1056 | // Read 64-bit entry from /proc/kpageflags to get the dirty bit for a page |
| 1057 | uint64_t kpage_flags_entry = 0; |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 1058 | if (!kpageflags_file->PreadFully(&kpage_flags_entry, |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 1059 | kPageFlagsEntrySize, |
| 1060 | page_frame_number * kPageFlagsEntrySize)) { |
| 1061 | *error_msg = StringPrintf("Failed to read the page flags from %s", |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 1062 | kpageflags_file->GetPath().c_str()); |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 1063 | return -1; |
| 1064 | } |
| 1065 | |
| 1066 | // Read 64-bit entyry from /proc/kpagecount to get mapping counts for a page |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 1067 | if (!kpagecount_file->PreadFully(page_count /*out*/, |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 1068 | kPageCountEntrySize, |
| 1069 | page_frame_number * kPageCountEntrySize)) { |
| 1070 | *error_msg = StringPrintf("Failed to read the page count from %s", |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 1071 | kpagecount_file->GetPath().c_str()); |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 1072 | return -1; |
| 1073 | } |
| 1074 | |
| 1075 | // There must be a page frame at the requested address. |
| 1076 | CHECK_EQ(kpage_flags_entry & kPageFlagsNoPageMask, 0u); |
| 1077 | // The page frame must be memory mapped |
| 1078 | CHECK_NE(kpage_flags_entry & kPageFlagsMmapMask, 0u); |
| 1079 | |
| 1080 | // Page is dirty, i.e. has diverged from file, if the 4th bit is set to 1 |
| 1081 | bool flags_dirty = (kpage_flags_entry & kPageFlagsDirtyMask) != 0; |
| 1082 | |
| 1083 | // page_frame_number_clean must come from the *same* process |
| 1084 | // but a *different* mmap than page_frame_number |
| 1085 | if (flags_dirty) { |
| 1086 | CHECK_NE(page_frame_number, page_frame_number_clean); |
| 1087 | } |
| 1088 | |
| 1089 | return page_frame_number != page_frame_number_clean; |
| 1090 | } |
| 1091 | |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 1092 | void PrintPidLine(const std::string& kind, pid_t pid) { |
| 1093 | if (pid < 0) { |
| 1094 | *os_ << kind << " DIFF PID: disabled\n\n"; |
| 1095 | } else { |
| 1096 | *os_ << kind << " DIFF PID (" << pid << "): "; |
| 1097 | } |
| 1098 | } |
| 1099 | |
| 1100 | static bool EndsWith(const std::string& str, const std::string& suffix) { |
| 1101 | return str.size() >= suffix.size() && |
| 1102 | str.compare(str.size() - suffix.size(), suffix.size(), suffix) == 0; |
| 1103 | } |
| 1104 | |
| 1105 | // Return suffix of the file path after the last /. (e.g. /foo/bar -> bar, bar -> bar) |
| 1106 | static std::string BaseName(const std::string& str) { |
| 1107 | size_t idx = str.rfind('/'); |
| 1108 | if (idx == std::string::npos) { |
| 1109 | return str; |
| 1110 | } |
| 1111 | |
| 1112 | return str.substr(idx + 1); |
| 1113 | } |
| 1114 | |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 1115 | // Return the image location, stripped of any directories, e.g. "boot.art" or "core.art" |
| 1116 | std::string GetImageLocationBaseName() const { |
| 1117 | return BaseName(std::string(image_location_)); |
| 1118 | } |
| 1119 | |
| 1120 | std::ostream* os_; |
| 1121 | const ImageHeader& image_header_; |
Andreas Gampe | 8994a04 | 2015-12-30 19:03:17 +0000 | [diff] [blame] | 1122 | const std::string image_location_; |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 1123 | pid_t image_diff_pid_; // Dump image diff against boot.art if pid is non-negative |
Mathieu Chartier | c5196cd | 2016-04-08 14:08:37 -0700 | [diff] [blame] | 1124 | pid_t zygote_diff_pid_; // Dump image diff against zygote boot.art if pid is non-negative |
David Sehr | 20e271a | 2017-06-14 13:02:14 -0700 | [diff] [blame] | 1125 | bool zygote_pid_only_; // The user only specified a pid for the zygote. |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 1126 | |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 1127 | // Pointer size constant for object fields, etc. |
| 1128 | PointerSize pointer_size_; |
| 1129 | // BacktraceMap used for finding the memory mapping of the image file. |
| 1130 | std::unique_ptr<BacktraceMap> proc_maps_; |
| 1131 | // Boot image mapping. |
| 1132 | backtrace_map_t boot_map_{}; // NOLINT |
| 1133 | // The size of the boot image mapping. |
| 1134 | size_t boot_map_size_; |
| 1135 | // The contents of /proc/<image_diff_pid_>/maps. |
| 1136 | std::vector<uint8_t> remote_contents_; |
| 1137 | // The contents of /proc/<zygote_diff_pid_>/maps. |
| 1138 | std::vector<uint8_t> zygote_contents_; |
| 1139 | // A File for reading /proc/<zygote_diff_pid_>/maps. |
| 1140 | File pagemap_file_; |
| 1141 | // A File for reading /proc/self/pagemap. |
| 1142 | File clean_pagemap_file_; |
| 1143 | // A File for reading /proc/kpageflags. |
| 1144 | File kpageflags_file_; |
| 1145 | // A File for reading /proc/kpagecount. |
| 1146 | File kpagecount_file_; |
| 1147 | |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 1148 | DISALLOW_COPY_AND_ASSIGN(ImgDiagDumper); |
| 1149 | }; |
| 1150 | |
Mathieu Chartier | c5196cd | 2016-04-08 14:08:37 -0700 | [diff] [blame] | 1151 | static int DumpImage(Runtime* runtime, |
| 1152 | std::ostream* os, |
| 1153 | pid_t image_diff_pid, |
| 1154 | pid_t zygote_diff_pid) { |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 1155 | ScopedObjectAccess soa(Thread::Current()); |
| 1156 | gc::Heap* heap = runtime->GetHeap(); |
Jeff Hao | dcdc85b | 2015-12-04 14:06:18 -0800 | [diff] [blame] | 1157 | std::vector<gc::space::ImageSpace*> image_spaces = heap->GetBootImageSpaces(); |
| 1158 | CHECK(!image_spaces.empty()); |
| 1159 | for (gc::space::ImageSpace* image_space : image_spaces) { |
| 1160 | const ImageHeader& image_header = image_space->GetImageHeader(); |
| 1161 | if (!image_header.IsValid()) { |
| 1162 | fprintf(stderr, "Invalid image header %s\n", image_space->GetImageLocation().c_str()); |
| 1163 | return EXIT_FAILURE; |
| 1164 | } |
| 1165 | |
Mathieu Chartier | c5196cd | 2016-04-08 14:08:37 -0700 | [diff] [blame] | 1166 | ImgDiagDumper img_diag_dumper(os, |
| 1167 | image_header, |
| 1168 | image_space->GetImageLocation(), |
| 1169 | image_diff_pid, |
| 1170 | zygote_diff_pid); |
David Sehr | 0627be3 | 2017-06-16 13:50:02 -0700 | [diff] [blame^] | 1171 | if (!img_diag_dumper.Init()) { |
| 1172 | return EXIT_FAILURE; |
| 1173 | } |
Jeff Hao | dcdc85b | 2015-12-04 14:06:18 -0800 | [diff] [blame] | 1174 | if (!img_diag_dumper.Dump()) { |
| 1175 | return EXIT_FAILURE; |
| 1176 | } |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 1177 | } |
Jeff Hao | dcdc85b | 2015-12-04 14:06:18 -0800 | [diff] [blame] | 1178 | return EXIT_SUCCESS; |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 1179 | } |
| 1180 | |
| 1181 | struct ImgDiagArgs : public CmdlineArgs { |
| 1182 | protected: |
| 1183 | using Base = CmdlineArgs; |
| 1184 | |
| 1185 | virtual ParseStatus ParseCustom(const StringPiece& option, |
| 1186 | std::string* error_msg) OVERRIDE { |
| 1187 | { |
| 1188 | ParseStatus base_parse = Base::ParseCustom(option, error_msg); |
| 1189 | if (base_parse != kParseUnknownArgument) { |
| 1190 | return base_parse; |
| 1191 | } |
| 1192 | } |
| 1193 | |
| 1194 | if (option.starts_with("--image-diff-pid=")) { |
| 1195 | const char* image_diff_pid = option.substr(strlen("--image-diff-pid=")).data(); |
| 1196 | |
| 1197 | if (!ParseInt(image_diff_pid, &image_diff_pid_)) { |
| 1198 | *error_msg = "Image diff pid out of range"; |
| 1199 | return kParseError; |
| 1200 | } |
Mathieu Chartier | c5196cd | 2016-04-08 14:08:37 -0700 | [diff] [blame] | 1201 | } else if (option.starts_with("--zygote-diff-pid=")) { |
| 1202 | const char* zygote_diff_pid = option.substr(strlen("--zygote-diff-pid=")).data(); |
| 1203 | |
| 1204 | if (!ParseInt(zygote_diff_pid, &zygote_diff_pid_)) { |
| 1205 | *error_msg = "Zygote diff pid out of range"; |
| 1206 | return kParseError; |
| 1207 | } |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 1208 | } else { |
| 1209 | return kParseUnknownArgument; |
| 1210 | } |
| 1211 | |
| 1212 | return kParseOk; |
| 1213 | } |
| 1214 | |
| 1215 | virtual ParseStatus ParseChecks(std::string* error_msg) OVERRIDE { |
| 1216 | // Perform the parent checks. |
| 1217 | ParseStatus parent_checks = Base::ParseChecks(error_msg); |
| 1218 | if (parent_checks != kParseOk) { |
| 1219 | return parent_checks; |
| 1220 | } |
| 1221 | |
| 1222 | // Perform our own checks. |
| 1223 | |
| 1224 | if (kill(image_diff_pid_, |
| 1225 | /*sig*/0) != 0) { // No signal is sent, perform error-checking only. |
| 1226 | // Check if the pid exists before proceeding. |
| 1227 | if (errno == ESRCH) { |
| 1228 | *error_msg = "Process specified does not exist"; |
| 1229 | } else { |
| 1230 | *error_msg = StringPrintf("Failed to check process status: %s", strerror(errno)); |
| 1231 | } |
| 1232 | return kParseError; |
| 1233 | } else if (instruction_set_ != kRuntimeISA) { |
| 1234 | // Don't allow different ISAs since the images are ISA-specific. |
| 1235 | // Right now the code assumes both the runtime ISA and the remote ISA are identical. |
| 1236 | *error_msg = "Must use the default runtime ISA; changing ISA is not supported."; |
| 1237 | return kParseError; |
| 1238 | } |
| 1239 | |
| 1240 | return kParseOk; |
| 1241 | } |
| 1242 | |
| 1243 | virtual std::string GetUsage() const { |
| 1244 | std::string usage; |
| 1245 | |
| 1246 | usage += |
| 1247 | "Usage: imgdiag [options] ...\n" |
| 1248 | " Example: imgdiag --image-diff-pid=$(pidof dex2oat)\n" |
| 1249 | " Example: adb shell imgdiag --image-diff-pid=$(pid zygote)\n" |
| 1250 | "\n"; |
| 1251 | |
| 1252 | usage += Base::GetUsage(); |
| 1253 | |
| 1254 | usage += // Optional. |
| 1255 | " --image-diff-pid=<pid>: provide the PID of a process whose boot.art you want to diff.\n" |
| 1256 | " Example: --image-diff-pid=$(pid zygote)\n" |
Mathieu Chartier | c5196cd | 2016-04-08 14:08:37 -0700 | [diff] [blame] | 1257 | " --zygote-diff-pid=<pid>: provide the PID of the zygote whose boot.art you want to diff " |
| 1258 | "against.\n" |
| 1259 | " Example: --zygote-diff-pid=$(pid zygote)\n" |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 1260 | "\n"; |
| 1261 | |
| 1262 | return usage; |
| 1263 | } |
| 1264 | |
| 1265 | public: |
| 1266 | pid_t image_diff_pid_ = -1; |
Mathieu Chartier | c5196cd | 2016-04-08 14:08:37 -0700 | [diff] [blame] | 1267 | pid_t zygote_diff_pid_ = -1; |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 1268 | }; |
| 1269 | |
| 1270 | struct ImgDiagMain : public CmdlineMain<ImgDiagArgs> { |
| 1271 | virtual bool ExecuteWithRuntime(Runtime* runtime) { |
| 1272 | CHECK(args_ != nullptr); |
| 1273 | |
| 1274 | return DumpImage(runtime, |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 1275 | args_->os_, |
Mathieu Chartier | c5196cd | 2016-04-08 14:08:37 -0700 | [diff] [blame] | 1276 | args_->image_diff_pid_, |
| 1277 | args_->zygote_diff_pid_) == EXIT_SUCCESS; |
Igor Murashkin | 3774335 | 2014-11-13 14:38:00 -0800 | [diff] [blame] | 1278 | } |
| 1279 | }; |
| 1280 | |
| 1281 | } // namespace art |
| 1282 | |
| 1283 | int main(int argc, char** argv) { |
| 1284 | art::ImgDiagMain main; |
| 1285 | return main.Main(argc, argv); |
| 1286 | } |