simpleperf/cmd_report.cpp

   1 /*
   2  * Copyright (C) 2015 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 <inttypes.h>
  18 #include <algorithm>
  19 #include <functional>
  20 #include <map>
  21 #include <set>
  22 #include <string>
  23 #include <unordered_map>
  24 #include <unordered_set>
  25 #include <vector>
  26
  27 #include <android-base/file.h>
  28 #include <android-base/logging.h>
  29 #include <android-base/parsedouble.h>
  30 #include <android-base/parseint.h>
  31 #include <android-base/stringprintf.h>
  32 #include <android-base/strings.h>
  33
  34 #include "command.h"
  35 #include "dwarf_unwind.h"
  36 #include "event_attr.h"
  37 #include "event_type.h"
  38 #include "perf_regs.h"
  39 #include "record.h"
  40 #include "record_file.h"
  41 #include "sample_tree.h"
  42 #include "thread_tree.h"
  43 #include "tracing.h"
  44 #include "utils.h"
  45
  46 namespace {
  47
  48 static std::set<std::string> branch_sort_keys = {
  49     "dso_from", "dso_to", "symbol_from", "symbol_to",
  50 };
  51 struct BranchFromEntry {
  52   const MapEntry* map;
  53   const Symbol* symbol;
  54   uint64_t vaddr_in_file;
  55   uint64_t flags;
  56
  57   BranchFromEntry()
  58       : map(nullptr), symbol(nullptr), vaddr_in_file(0), flags(0) {}
  59 };
  60
  61 struct SampleEntry {
  62   uint64_t time;
  63   uint64_t period;
  64   // accumuated when appearing in other sample's callchain
  65   uint64_t accumulated_period;
  66   uint64_t sample_count;
  67   const ThreadEntry* thread;
  68   const char* thread_comm;
  69   const MapEntry* map;
  70   const Symbol* symbol;
  71   uint64_t vaddr_in_file;
  72   BranchFromEntry branch_from;
  73   // a callchain tree representing all callchains in the sample
  74   CallChainRoot<SampleEntry> callchain;
  75
  76   SampleEntry(uint64_t time, uint64_t period, uint64_t accumulated_period,
  77               uint64_t sample_count, const ThreadEntry* thread,
  78               const MapEntry* map, const Symbol* symbol, uint64_t vaddr_in_file)
  79       : time(time),
  80         period(period),
  81         accumulated_period(accumulated_period),
  82         sample_count(sample_count),
  83         thread(thread),
  84         thread_comm(thread->comm),
  85         map(map),
  86         symbol(symbol),
  87         vaddr_in_file(vaddr_in_file) {}
  88
  89   // The data member 'callchain' can only move, not copy.
  90   SampleEntry(SampleEntry&&) = default;
  91   SampleEntry(SampleEntry&) = delete;
  92
  93   uint64_t GetPeriod() const {
  94     return period;
  95   }
  96 };
  97
  98 struct SampleTree {
  99   std::vector<SampleEntry*> samples;
 100   uint64_t total_samples;
 101   uint64_t total_period;
 102 };
 103
 104 BUILD_COMPARE_VALUE_FUNCTION(CompareVaddrInFile, vaddr_in_file);
 105 BUILD_DISPLAY_HEX64_FUNCTION(DisplayVaddrInFile, vaddr_in_file);
 106
 107 class ReportCmdSampleTreeBuilder
 108     : public SampleTreeBuilder<SampleEntry, uint64_t> {
 109  public:
 110   ReportCmdSampleTreeBuilder(SampleComparator<SampleEntry> sample_comparator,
 111                              ThreadTree* thread_tree)
 112       : SampleTreeBuilder(sample_comparator),
 113         thread_tree_(thread_tree),
 114         total_samples_(0),
 115         total_period_(0) {}
 116
 117   void SetFilters(const std::unordered_set<int>& pid_filter,
 118                   const std::unordered_set<int>& tid_filter,
 119                   const std::unordered_set<std::string>& comm_filter,
 120                   const std::unordered_set<std::string>& dso_filter,
 121                   const std::unordered_set<std::string>& symbol_filter) {
 122     pid_filter_ = pid_filter;
 123     tid_filter_ = tid_filter;
 124     comm_filter_ = comm_filter;
 125     dso_filter_ = dso_filter;
 126     symbol_filter_ = symbol_filter;
 127   }
 128
 129   SampleTree GetSampleTree() const {
 130     SampleTree sample_tree;
 131     sample_tree.samples = GetSamples();
 132     sample_tree.total_samples = total_samples_;
 133     sample_tree.total_period = total_period_;
 134     return sample_tree;
 135   }
 136
 137  protected:
 138   SampleEntry* CreateSample(const SampleRecord& r, bool in_kernel,
 139                             uint64_t* acc_info) override {
 140     const ThreadEntry* thread =
 141         thread_tree_->FindThreadOrNew(r.tid_data.pid, r.tid_data.tid);
 142     const MapEntry* map =
 143         thread_tree_->FindMap(thread, r.ip_data.ip, in_kernel);
 144     uint64_t vaddr_in_file;
 145     const Symbol* symbol =
 146         thread_tree_->FindSymbol(map, r.ip_data.ip, &vaddr_in_file);
 147     *acc_info = r.period_data.period;
 148     return InsertSample(std::unique_ptr<SampleEntry>(
 149         new SampleEntry(r.time_data.time, r.period_data.period, 0, 1, thread,
 150                         map, symbol, vaddr_in_file)));
 151   }
 152
 153   SampleEntry* CreateBranchSample(const SampleRecord& r,
 154                                   const BranchStackItemType& item) override {
 155     const ThreadEntry* thread =
 156         thread_tree_->FindThreadOrNew(r.tid_data.pid, r.tid_data.tid);
 157     const MapEntry* from_map = thread_tree_->FindMap(thread, item.from);
 158     uint64_t from_vaddr_in_file;
 159     const Symbol* from_symbol =
 160         thread_tree_->FindSymbol(from_map, item.from, &from_vaddr_in_file);
 161     const MapEntry* to_map = thread_tree_->FindMap(thread, item.to);
 162     uint64_t to_vaddr_in_file;
 163     const Symbol* to_symbol =
 164         thread_tree_->FindSymbol(to_map, item.to, &to_vaddr_in_file);
 165     std::unique_ptr<SampleEntry> sample(
 166         new SampleEntry(r.time_data.time, r.period_data.period, 0, 1, thread,
 167                         to_map, to_symbol, to_vaddr_in_file));
 168     sample->branch_from.map = from_map;
 169     sample->branch_from.symbol = from_symbol;
 170     sample->branch_from.vaddr_in_file = from_vaddr_in_file;
 171     sample->branch_from.flags = item.flags;
 172     return InsertSample(std::move(sample));
 173   }
 174
 175   SampleEntry* CreateCallChainSample(const SampleEntry* sample, uint64_t ip,
 176                                      bool in_kernel,
 177                                      const std::vector<SampleEntry*>& callchain,
 178                                      const uint64_t& acc_info) override {
 179     const ThreadEntry* thread = sample->thread;
 180     const MapEntry* map = thread_tree_->FindMap(thread, ip, in_kernel);
 181     uint64_t vaddr_in_file;
 182     const Symbol* symbol = thread_tree_->FindSymbol(map, ip, &vaddr_in_file);
 183     std::unique_ptr<SampleEntry> callchain_sample(new SampleEntry(
 184         sample->time, 0, acc_info, 0, thread, map, symbol, vaddr_in_file));
 185     callchain_sample->thread_comm = sample->thread_comm;
 186     return InsertCallChainSample(std::move(callchain_sample), callchain);
 187   }
 188
 189   const ThreadEntry* GetThreadOfSample(SampleEntry* sample) override {
 190     return sample->thread;
 191   }
 192
 193   uint64_t GetPeriodForCallChain(const uint64_t& acc_info) override {
 194     return acc_info;
 195   }
 196
 197   bool FilterSample(const SampleEntry* sample) override {
 198     if (!pid_filter_.empty() &&
 199         pid_filter_.find(sample->thread->pid) == pid_filter_.end()) {
 200       return false;
 201     }
 202     if (!tid_filter_.empty() &&
 203         tid_filter_.find(sample->thread->tid) == tid_filter_.end()) {
 204       return false;
 205     }
 206     if (!comm_filter_.empty() &&
 207         comm_filter_.find(sample->thread_comm) == comm_filter_.end()) {
 208       return false;
 209     }
 210     if (!dso_filter_.empty() &&
 211         dso_filter_.find(sample->map->dso->Path()) == dso_filter_.end()) {
 212       return false;
 213     }
 214     if (!symbol_filter_.empty() &&
 215         symbol_filter_.find(sample->symbol->DemangledName()) ==
 216             symbol_filter_.end()) {
 217       return false;
 218     }
 219     return true;
 220   }
 221
 222   void UpdateSummary(const SampleEntry* sample) override {
 223     total_samples_ += sample->sample_count;
 224     total_period_ += sample->period;
 225   }
 226
 227   void MergeSample(SampleEntry* sample1, SampleEntry* sample2) override {
 228     sample1->period += sample2->period;
 229     sample1->accumulated_period += sample2->accumulated_period;
 230     sample1->sample_count += sample2->sample_count;
 231   }
 232
 233  private:
 234   ThreadTree* thread_tree_;
 235
 236   std::unordered_set<int> pid_filter_;
 237   std::unordered_set<int> tid_filter_;
 238   std::unordered_set<std::string> comm_filter_;
 239   std::unordered_set<std::string> dso_filter_;
 240   std::unordered_set<std::string> symbol_filter_;
 241
 242   uint64_t total_samples_;
 243   uint64_t total_period_;
 244 };
 245
 246 struct SampleTreeBuilderOptions {
 247   SampleComparator<SampleEntry> comparator;
 248   ThreadTree* thread_tree;
 249   std::unordered_set<std::string> comm_filter;
 250   std::unordered_set<std::string> dso_filter;
 251   std::unordered_set<std::string> symbol_filter;
 252   std::unordered_set<int> pid_filter;
 253   std::unordered_set<int> tid_filter;
 254   bool use_branch_address;
 255   bool accumulate_callchain;
 256   bool build_callchain;
 257   bool use_caller_as_callchain_root;
 258   bool strict_unwind_arch_check;
 259
 260   std::unique_ptr<ReportCmdSampleTreeBuilder> CreateSampleTreeBuilder() {
 261     std::unique_ptr<ReportCmdSampleTreeBuilder> builder(
 262         new ReportCmdSampleTreeBuilder(comparator, thread_tree));
 263     builder->SetFilters(pid_filter, tid_filter, comm_filter, dso_filter, symbol_filter);
 264     builder->SetBranchSampleOption(use_branch_address);
 265     builder->SetCallChainSampleOptions(accumulate_callchain, build_callchain,
 266                                        use_caller_as_callchain_root, strict_unwind_arch_check);
 267     return builder;
 268   }
 269 };
 270
 271 using ReportCmdSampleTreeSorter = SampleTreeSorter<SampleEntry>;
 272 using ReportCmdSampleTreeDisplayer =
 273     SampleTreeDisplayer<SampleEntry, SampleTree>;
 274
 275 using ReportCmdCallgraphDisplayer =
 276     CallgraphDisplayer<SampleEntry, CallChainNode<SampleEntry>>;
 277
 278 class ReportCmdCallgraphDisplayerWithVaddrInFile
 279     : public ReportCmdCallgraphDisplayer {
 280  protected:
 281   std::string PrintSampleName(const SampleEntry* sample) override {
 282     return android::base::StringPrintf("%s [+0x%" PRIx64 "]",
 283                                        sample->symbol->DemangledName(),
 284                                        sample->vaddr_in_file);
 285   }
 286 };
 287
 288 struct EventAttrWithName {
 289   perf_event_attr attr;
 290   std::string name;
 291 };
 292
 293 class ReportCommand : public Command {
 294  public:
 295   ReportCommand()
 296       : Command(
 297             "report", "report sampling information in perf.data",
 298             // clang-format off
 299 "Usage: simpleperf report [options]\n"
 300 "-b    Use the branch-to addresses in sampled take branches instead of the\n"
 301 "      instruction addresses. Only valid for perf.data recorded with -b/-j\n"
 302 "      option.\n"
 303 "--children    Print the overhead accumulated by appearing in the callchain.\n"
 304 "--comms comm1,comm2,...   Report only for selected comms.\n"
 305 "--dsos dso1,dso2,...      Report only for selected dsos.\n"
 306 "-g [callee|caller]    Print call graph. If callee mode is used, the graph\n"
 307 "                      shows how functions are called from others. Otherwise,\n"
 308 "                      the graph shows how functions call others.\n"
 309 "                      Default is caller mode.\n"
 310 "-i <file>  Specify path of record file, default is perf.data.\n"
 311 "--kallsyms <file>     Set the file to read kernel symbols.\n"
 312 "--max-stack <frames>  Set max stack frames shown when printing call graph.\n"
 313 "-n         Print the sample count for each item.\n"
 314 "--no-demangle         Don't demangle symbol names.\n"
 315 "--no-show-ip          Don't show vaddr in file for unknown symbols.\n"
 316 "-o report_file_name   Set report file name, default is stdout.\n"
 317 "--percent-limit <percent>  Set min percentage shown when printing call graph.\n"
 318 "--pids pid1,pid2,...  Report only for selected pids.\n"
 319 "--sort key1,key2,...  Select keys used to sort and print the report. The\n"
 320 "                      appearance order of keys decides the order of keys used\n"
 321 "                      to sort and print the report.\n"
 322 "                      Possible keys include:\n"
 323 "                        pid             -- process id\n"
 324 "                        tid             -- thread id\n"
 325 "                        comm            -- thread name (can be changed during\n"
 326 "                                           the lifetime of a thread)\n"
 327 "                        dso             -- shared library\n"
 328 "                        symbol          -- function name in the shared library\n"
 329 "                        vaddr_in_file   -- virtual address in the shared\n"
 330 "                                           library\n"
 331 "                      Keys can only be used with -b option:\n"
 332 "                        dso_from        -- shared library branched from\n"
 333 "                        dso_to          -- shared library branched to\n"
 334 "                        symbol_from     -- name of function branched from\n"
 335 "                        symbol_to       -- name of function branched to\n"
 336 "                      The default sort keys are:\n"
 337 "                        comm,pid,tid,dso,symbol\n"
 338 "--symbols symbol1;symbol2;...    Report only for selected symbols.\n"
 339 "--symfs <dir>         Look for files with symbols relative to this directory.\n"
 340 "--tids tid1,tid2,...  Report only for selected tids.\n"
 341 "--vmlinux <file>      Parse kernel symbols from <file>.\n"
 342             // clang-format on
 343             ),
 344         record_filename_("perf.data"),
 345         record_file_arch_(GetBuildArch()),
 346         use_branch_address_(false),
 347         system_wide_collection_(false),
 348         accumulate_callchain_(false),
 349         print_callgraph_(false),
 350         callgraph_show_callee_(false),
 351         callgraph_max_stack_(UINT32_MAX),
 352         callgraph_percent_limit_(0) {}
 353
 354   bool Run(const std::vector<std::string>& args);
 355
 356  private:
 357   bool ParseOptions(const std::vector<std::string>& args);
 358   bool ReadEventAttrFromRecordFile();
 359   bool ReadFeaturesFromRecordFile();
 360   bool ReadSampleTreeFromRecordFile();
 361   bool ProcessRecord(std::unique_ptr<Record> record);
 362   bool ProcessTracingData(const std::vector<char>& data);
 363   bool PrintReport();
 364   void PrintReportContext(FILE* fp);
 365
 366   std::string record_filename_;
 367   ArchType record_file_arch_;
 368   std::unique_ptr<RecordFileReader> record_file_reader_;
 369   std::vector<EventAttrWithName> event_attrs_;
 370   ThreadTree thread_tree_;
 371   // Create a SampleTreeBuilder and SampleTree for each event_attr.
 372   std::vector<SampleTree> sample_tree_;
 373   SampleTreeBuilderOptions sample_tree_builder_options_;
 374   std::vector<std::unique_ptr<ReportCmdSampleTreeBuilder>> sample_tree_builder_;
 375
 376   std::unique_ptr<ReportCmdSampleTreeSorter> sample_tree_sorter_;
 377   std::unique_ptr<ReportCmdSampleTreeDisplayer> sample_tree_displayer_;
 378   bool use_branch_address_;
 379   std::string record_cmdline_;
 380   bool system_wide_collection_;
 381   bool accumulate_callchain_;
 382   bool print_callgraph_;
 383   bool callgraph_show_callee_;
 384   uint32_t callgraph_max_stack_;
 385   double callgraph_percent_limit_;
 386
 387   std::string report_filename_;
 388 };
 389
 390 bool ReportCommand::Run(const std::vector<std::string>& args) {
 391   // 1. Parse options.
 392   if (!ParseOptions(args)) {
 393     return false;
 394   }
 395
 396   // 2. Read record file and build SampleTree.
 397   record_file_reader_ = RecordFileReader::CreateInstance(record_filename_);
 398   if (record_file_reader_ == nullptr) {
 399     return false;
 400   }
 401   if (!ReadEventAttrFromRecordFile()) {
 402     return false;
 403   }
 404   // Read features first to prepare build ids used when building SampleTree.
 405   if (!ReadFeaturesFromRecordFile()) {
 406     return false;
 407   }
 408   ScopedCurrentArch scoped_arch(record_file_arch_);
 409   if (!ReadSampleTreeFromRecordFile()) {
 410     return false;
 411   }
 412
 413   // 3. Show collected information.
 414   if (!PrintReport()) {
 415     return false;
 416   }
 417
 418   return true;
 419 }
 420
 421 bool ReportCommand::ParseOptions(const std::vector<std::string>& args) {
 422   bool demangle = true;
 423   bool show_ip_for_unknown_symbol = true;
 424   std::string symfs_dir;
 425   std::string vmlinux;
 426   bool print_sample_count = false;
 427   std::vector<std::string> sort_keys = {"comm", "pid", "tid", "dso", "symbol"};
 428
 429   for (size_t i = 0; i < args.size(); ++i) {
 430     if (args[i] == "-b") {
 431       use_branch_address_ = true;
 432     } else if (args[i] == "--children") {
 433       accumulate_callchain_ = true;
 434     } else if (args[i] == "--comms" || args[i] == "--dsos") {
 435       std::unordered_set<std::string>& filter =
 436           (args[i] == "--comms" ? sample_tree_builder_options_.comm_filter
 437                                 : sample_tree_builder_options_.dso_filter);
 438       if (!NextArgumentOrError(args, &i)) {
 439         return false;
 440       }
 441       std::vector<std::string> strs = android::base::Split(args[i], ",");
 442       filter.insert(strs.begin(), strs.end());
 443
 444     } else if (args[i] == "-g") {
 445       print_callgraph_ = true;
 446       accumulate_callchain_ = true;
 447       if (i + 1 < args.size() && args[i + 1][0] != '-') {
 448         ++i;
 449         if (args[i] == "callee") {
 450           callgraph_show_callee_ = true;
 451         } else if (args[i] == "caller") {
 452           callgraph_show_callee_ = false;
 453         } else {
 454           LOG(ERROR) << "Unknown argument with -g option: " << args[i];
 455           return false;
 456         }
 457       }
 458     } else if (args[i] == "-i") {
 459       if (!NextArgumentOrError(args, &i)) {
 460         return false;
 461       }
 462       record_filename_ = args[i];
 463
 464     } else if (args[i] == "--kallsyms") {
 465       if (!NextArgumentOrError(args, &i)) {
 466         return false;
 467       }
 468       std::string kallsyms;
 469       if (!android::base::ReadFileToString(args[i], &kallsyms)) {
 470         LOG(ERROR) << "Can't read kernel symbols from " << args[i];
 471         return false;
 472       }
 473       Dso::SetKallsyms(kallsyms);
 474     } else if (args[i] == "--max-stack") {
 475       if (!NextArgumentOrError(args, &i)) {
 476         return false;
 477       }
 478       if (!android::base::ParseUint(args[i].c_str(), &callgraph_max_stack_)) {
 479         LOG(ERROR) << "invalid arg for --max-stack: " << args[i];
 480         return false;
 481       }
 482     } else if (args[i] == "-n") {
 483       print_sample_count = true;
 484
 485     } else if (args[i] == "--no-demangle") {
 486       demangle = false;
 487     } else if (args[i] == "--no-show-ip") {
 488       show_ip_for_unknown_symbol = false;
 489     } else if (args[i] == "-o") {
 490       if (!NextArgumentOrError(args, &i)) {
 491         return false;
 492       }
 493       report_filename_ = args[i];
 494     } else if (args[i] == "--percent-limit") {
 495       if (!NextArgumentOrError(args, &i)) {
 496         return false;
 497       }
 498       if (!android::base::ParseDouble(args[i].c_str(),
 499                                       &callgraph_percent_limit_, 0.0)) {
 500         LOG(ERROR) << "invalid arg for --percent-limit: " << args[i];
 501       }
 502     } else if (args[i] == "--pids" || args[i] == "--tids") {
 503       const std::string& option = args[i];
 504       std::unordered_set<int>& filter =
 505           (option == "--pids" ? sample_tree_builder_options_.pid_filter
 506                               : sample_tree_builder_options_.tid_filter);
 507       if (!NextArgumentOrError(args, &i)) {
 508         return false;
 509       }
 510       std::vector<std::string> strs = android::base::Split(args[i], ",");
 511       for (const auto& s : strs) {
 512         int id;
 513         if (!android::base::ParseInt(s.c_str(), &id, 0)) {
 514           LOG(ERROR) << "invalid id in " << option << " option: " << s;
 515           return false;
 516         }
 517         filter.insert(id);
 518       }
 519
 520     } else if (args[i] == "--sort") {
 521       if (!NextArgumentOrError(args, &i)) {
 522         return false;
 523       }
 524       sort_keys = android::base::Split(args[i], ",");
 525     } else if (args[i] == "--symbols") {
 526       if (!NextArgumentOrError(args, &i)) {
 527         return false;
 528       }
 529       std::vector<std::string> strs = android::base::Split(args[i], ";");
 530       sample_tree_builder_options_.symbol_filter.insert(strs.begin(), strs.end());
 531     } else if (args[i] == "--symfs") {
 532       if (!NextArgumentOrError(args, &i)) {
 533         return false;
 534       }
 535       symfs_dir = args[i];
 536
 537     } else if (args[i] == "--vmlinux") {
 538       if (!NextArgumentOrError(args, &i)) {
 539         return false;
 540       }
 541       vmlinux = args[i];
 542     } else {
 543       ReportUnknownOption(args, i);
 544       return false;
 545     }
 546   }
 547
 548   Dso::SetDemangle(demangle);
 549   if (!Dso::SetSymFsDir(symfs_dir)) {
 550     return false;
 551   }
 552   if (!vmlinux.empty()) {
 553     Dso::SetVmlinux(vmlinux);
 554   }
 555
 556   if (show_ip_for_unknown_symbol) {
 557     thread_tree_.ShowIpForUnknownSymbol();
 558   }
 559
 560   SampleDisplayer<SampleEntry, SampleTree> displayer;
 561   SampleComparator<SampleEntry> comparator;
 562
 563   if (accumulate_callchain_) {
 564     displayer.AddDisplayFunction("Children", DisplayAccumulatedOverhead);
 565     displayer.AddDisplayFunction("Self", DisplaySelfOverhead);
 566   } else {
 567     displayer.AddDisplayFunction("Overhead", DisplaySelfOverhead);
 568   }
 569   if (print_sample_count) {
 570     displayer.AddDisplayFunction("Sample", DisplaySampleCount);
 571   }
 572
 573   for (auto& key : sort_keys) {
 574     if (!use_branch_address_ &&
 575         branch_sort_keys.find(key) != branch_sort_keys.end()) {
 576       LOG(ERROR) << "sort key '" << key << "' can only be used with -b option.";
 577       return false;
 578     }
 579     if (key == "pid") {
 580       comparator.AddCompareFunction(ComparePid);
 581       displayer.AddDisplayFunction("Pid", DisplayPid);
 582     } else if (key == "tid") {
 583       comparator.AddCompareFunction(CompareTid);
 584       displayer.AddDisplayFunction("Tid", DisplayTid);
 585     } else if (key == "comm") {
 586       comparator.AddCompareFunction(CompareComm);
 587       displayer.AddDisplayFunction("Command", DisplayComm);
 588     } else if (key == "dso") {
 589       comparator.AddCompareFunction(CompareDso);
 590       displayer.AddDisplayFunction("Shared Object", DisplayDso);
 591     } else if (key == "symbol") {
 592       comparator.AddCompareFunction(CompareSymbol);
 593       displayer.AddDisplayFunction("Symbol", DisplaySymbol);
 594     } else if (key == "vaddr_in_file") {
 595       comparator.AddCompareFunction(CompareVaddrInFile);
 596       displayer.AddDisplayFunction("VaddrInFile", DisplayVaddrInFile);
 597     } else if (key == "dso_from") {
 598       comparator.AddCompareFunction(CompareDsoFrom);
 599       displayer.AddDisplayFunction("Source Shared Object", DisplayDsoFrom);
 600     } else if (key == "dso_to") {
 601       comparator.AddCompareFunction(CompareDso);
 602       displayer.AddDisplayFunction("Target Shared Object", DisplayDso);
 603     } else if (key == "symbol_from") {
 604       comparator.AddCompareFunction(CompareSymbolFrom);
 605       displayer.AddDisplayFunction("Source Symbol", DisplaySymbolFrom);
 606     } else if (key == "symbol_to") {
 607       comparator.AddCompareFunction(CompareSymbol);
 608       displayer.AddDisplayFunction("Target Symbol", DisplaySymbol);
 609     } else {
 610       LOG(ERROR) << "Unknown sort key: " << key;
 611       return false;
 612     }
 613   }
 614   if (print_callgraph_) {
 615     bool has_symbol_key = false;
 616     bool has_vaddr_in_file_key = false;
 617     for (const auto& key : sort_keys) {
 618       if (key == "symbol") {
 619         has_symbol_key = true;
 620       } else if (key == "vaddr_in_file") {
 621         has_vaddr_in_file_key = true;
 622       }
 623     }
 624     if (has_symbol_key) {
 625       if (has_vaddr_in_file_key) {
 626         displayer.AddExclusiveDisplayFunction(
 627             ReportCmdCallgraphDisplayerWithVaddrInFile());
 628       } else {
 629         displayer.AddExclusiveDisplayFunction(ReportCmdCallgraphDisplayer(
 630             callgraph_max_stack_, callgraph_percent_limit_));
 631       }
 632     }
 633   }
 634
 635   sample_tree_builder_options_.comparator = comparator;
 636   sample_tree_builder_options_.thread_tree = &thread_tree_;
 637
 638   SampleComparator<SampleEntry> sort_comparator;
 639   sort_comparator.AddCompareFunction(CompareTotalPeriod);
 640   sort_comparator.AddComparator(comparator);
 641   sample_tree_sorter_.reset(new ReportCmdSampleTreeSorter(sort_comparator));
 642   sample_tree_displayer_.reset(new ReportCmdSampleTreeDisplayer(displayer));
 643   return true;
 644 }
 645
 646 bool ReportCommand::ReadEventAttrFromRecordFile() {
 647   std::vector<EventAttrWithId> attrs = record_file_reader_->AttrSection();
 648   for (const auto& attr_with_id : attrs) {
 649     EventAttrWithName attr;
 650     attr.attr = *attr_with_id.attr;
 651     attr.name = GetEventNameByAttr(attr.attr);
 652     event_attrs_.push_back(attr);
 653   }
 654   if (use_branch_address_) {
 655     bool has_branch_stack = true;
 656     for (const auto& attr : event_attrs_) {
 657       if ((attr.attr.sample_type & PERF_SAMPLE_BRANCH_STACK) == 0) {
 658         has_branch_stack = false;
 659         break;
 660       }
 661     }
 662     if (!has_branch_stack) {
 663       LOG(ERROR) << record_filename_
 664                  << " is not recorded with branch stack sampling option.";
 665       return false;
 666     }
 667   }
 668   return true;
 669 }
 670
 671 bool ReportCommand::ReadFeaturesFromRecordFile() {
 672   record_file_reader_->LoadBuildIdAndFileFeatures(thread_tree_);
 673
 674   std::string arch =
 675       record_file_reader_->ReadFeatureString(PerfFileFormat::FEAT_ARCH);
 676   if (!arch.empty()) {
 677     record_file_arch_ = GetArchType(arch);
 678     if (record_file_arch_ == ARCH_UNSUPPORTED) {
 679       return false;
 680     }
 681   }
 682
 683   std::vector<std::string> cmdline = record_file_reader_->ReadCmdlineFeature();
 684   if (!cmdline.empty()) {
 685     record_cmdline_ = android::base::Join(cmdline, ' ');
 686     // TODO: the code to detect system wide collection option is fragile, remove
 687     // it once we can do cross unwinding.
 688     for (size_t i = 0; i < cmdline.size(); i++) {
 689       std::string& s = cmdline[i];
 690       if (s == "-a") {
 691         system_wide_collection_ = true;
 692         break;
 693       } else if (s == "--call-graph" || s == "--cpu" || s == "-e" ||
 694                  s == "-f" || s == "-F" || s == "-j" || s == "-m" ||
 695                  s == "-o" || s == "-p" || s == "-t") {
 696         i++;
 697       } else if (!s.empty() && s[0] != '-') {
 698         break;
 699       }
 700     }
 701   }
 702   if (record_file_reader_->HasFeature(PerfFileFormat::FEAT_TRACING_DATA)) {
 703     std::vector<char> tracing_data;
 704     if (!record_file_reader_->ReadFeatureSection(
 705             PerfFileFormat::FEAT_TRACING_DATA, &tracing_data)) {
 706       return false;
 707     }
 708     if (!ProcessTracingData(tracing_data)) {
 709       return false;
 710     }
 711   }
 712   return true;
 713 }
 714
 715 bool ReportCommand::ReadSampleTreeFromRecordFile() {
 716   sample_tree_builder_options_.use_branch_address = use_branch_address_;
 717   // Normally do strict arch check when unwinding stack. But allow unwinding
 718   // 32-bit processes on 64-bit devices for system wide profiling.
 719   sample_tree_builder_options_.strict_unwind_arch_check = !system_wide_collection_;
 720   sample_tree_builder_options_.accumulate_callchain = accumulate_callchain_;
 721   sample_tree_builder_options_.build_callchain = print_callgraph_;
 722   sample_tree_builder_options_.use_caller_as_callchain_root = !callgraph_show_callee_;
 723
 724   for (size_t i = 0; i < event_attrs_.size(); ++i) {
 725     sample_tree_builder_.push_back(sample_tree_builder_options_.CreateSampleTreeBuilder());
 726   }
 727
 728   if (!record_file_reader_->ReadDataSection(
 729           [this](std::unique_ptr<Record> record) {
 730             return ProcessRecord(std::move(record));
 731           })) {
 732     return false;
 733   }
 734   for (size_t i = 0; i < sample_tree_builder_.size(); ++i) {
 735     sample_tree_.push_back(sample_tree_builder_[i]->GetSampleTree());
 736     sample_tree_sorter_->Sort(sample_tree_.back().samples, print_callgraph_);
 737   }
 738   return true;
 739 }
 740
 741 bool ReportCommand::ProcessRecord(std::unique_ptr<Record> record) {
 742   thread_tree_.Update(*record);
 743   if (record->type() == PERF_RECORD_SAMPLE) {
 744     size_t attr_id = record_file_reader_->GetAttrIndexOfRecord(record.get());
 745     sample_tree_builder_[attr_id]->ProcessSampleRecord(
 746         *static_cast<const SampleRecord*>(record.get()));
 747   } else if (record->type() == PERF_RECORD_TRACING_DATA) {
 748     const auto& r = *static_cast<TracingDataRecord*>(record.get());
 749     if (!ProcessTracingData(std::vector<char>(r.data, r.data + r.data_size))) {
 750       return false;
 751     }
 752   }
 753   return true;
 754 }
 755
 756 bool ReportCommand::ProcessTracingData(const std::vector<char>& data) {
 757   Tracing tracing(data);
 758   for (auto& attr : event_attrs_) {
 759     if (attr.attr.type == PERF_TYPE_TRACEPOINT) {
 760       uint64_t trace_event_id = attr.attr.config;
 761       attr.name = tracing.GetTracingEventNameHavingId(trace_event_id);
 762     }
 763   }
 764   return true;
 765 }
 766
 767 bool ReportCommand::PrintReport() {
 768   std::unique_ptr<FILE, decltype(&fclose)> file_handler(nullptr, fclose);
 769   FILE* report_fp = stdout;
 770   if (!report_filename_.empty()) {
 771     report_fp = fopen(report_filename_.c_str(), "w");
 772     if (report_fp == nullptr) {
 773       PLOG(ERROR) << "failed to open file " << report_filename_;
 774       return false;
 775     }
 776     file_handler.reset(report_fp);
 777   }
 778   PrintReportContext(report_fp);
 779   for (size_t i = 0; i < event_attrs_.size(); ++i) {
 780     if (i != 0) {
 781       fprintf(report_fp, "\n");
 782     }
 783     EventAttrWithName& attr = event_attrs_[i];
 784     SampleTree& sample_tree = sample_tree_[i];
 785     fprintf(report_fp, "Event: %s (type %u, config %llu)\n", attr.name.c_str(),
 786             attr.attr.type, attr.attr.config);
 787     fprintf(report_fp, "Samples: %" PRIu64 "\n", sample_tree.total_samples);
 788     fprintf(report_fp, "Event count: %" PRIu64 "\n\n", sample_tree.total_period);
 789     sample_tree_displayer_->DisplaySamples(report_fp, sample_tree.samples, &sample_tree);
 790   }
 791   fflush(report_fp);
 792   if (ferror(report_fp) != 0) {
 793     PLOG(ERROR) << "print report failed";
 794     return false;
 795   }
 796   return true;
 797 }
 798
 799 void ReportCommand::PrintReportContext(FILE* report_fp) {
 800   if (!record_cmdline_.empty()) {
 801     fprintf(report_fp, "Cmdline: %s\n", record_cmdline_.c_str());
 802   }
 803   fprintf(report_fp, "Arch: %s\n", GetArchString(record_file_arch_).c_str());
 804 }
 805
 806 }  // namespace
 807
 808 void RegisterReportCommand() {
 809   RegisterCommand("report",
 810                   [] { return std::unique_ptr<Command>(new ReportCommand()); });
 811 }