simpleperf/cmd_dumprecord.cpp - platform/system/extras - Git at Google

 /*
  * Copyright (C) 2015 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 #include <inttypes.h>

 #include <map>
 #include <string>
 #include <type_traits>
 #include <vector>

 #include <android-base/logging.h>
 #include <android-base/stringprintf.h>
 #include <android-base/strings.h>

 #include "ETMDecoder.h"
 #include "command.h"
 #include "dso.h"
 #include "event_attr.h"
 #include "event_type.h"
 #include "perf_regs.h"
 #include "record.h"
 #include "record_file.h"
 #include "tracing.h"
 #include "utils.h"

 namespace simpleperf {
 namespace {

 using namespace PerfFileFormat;

 struct SymbolInfo {
   Dso* dso;
   const Symbol* symbol;
   uint64_t vaddr_in_file;
 };

 using ExtractFieldFn = std::function<std::string(const TracingField&, const PerfSampleRawType&)>;

 struct EventInfo {
   size_t tp_data_size = 0;
   std::vector<TracingField> tp_fields;
   std::vector<ExtractFieldFn> extract_field_functions;
 };

 std::string ExtractStringField(const TracingField& field, const PerfSampleRawType& data) {
   std::string s;
   // data points to a char [field.elem_count] array. It is not guaranteed to be ended
   // with '\0'. So need to copy from data like strncpy.
   size_t max_len = std::min(data.size - field.offset, field.elem_count);
   const char* p = data.data + field.offset;
   for (size_t i = 0; i < max_len && *p != '\0'; i++) {
     s.push_back(*p++);
   }
   return s;
 }

 std::string ExtractDynamicStringField(const TracingField& field, const PerfSampleRawType& data) {
   std::string s;
   const char* p = data.data + field.offset;
   if (field.elem_size != 4 || field.offset + field.elem_size > data.size) {
     return s;
   }
   uint32_t location;
   MoveFromBinaryFormat(location, p);
   // Parse location: (max_len << 16) | off.
   uint32_t offset = location & 0xffff;
   uint32_t max_len = location >> 16;
   if (offset + max_len <= data.size) {
     p = data.data + offset;
     for (size_t i = 0; i < max_len && *p != '\0'; i++) {
       s.push_back(*p++);
     }
   }
   return s;
 }

 template <typename T, typename UT = typename std::make_unsigned<T>::type>
 std::string ExtractIntFieldFromPointer(const TracingField& field, const char* p) {
   static_assert(std::is_signed<T>::value);
   T value;
   MoveFromBinaryFormat(value, p);

   if (field.is_signed) {
     return android::base::StringPrintf("%" PRId64, static_cast<int64_t>(value));
   }
   return android::base::StringPrintf("0x%" PRIx64, static_cast<uint64_t>(static_cast<UT>(value)));
 }

 template <typename T>
 std::string ExtractIntField(const TracingField& field, const PerfSampleRawType& data) {
   if (field.offset + sizeof(T) > data.size) {
     return "";
   }
   return ExtractIntFieldFromPointer<T>(field, data.data + field.offset);
 }

 template <typename T>
 std::string ExtractIntArrayField(const TracingField& field, const PerfSampleRawType& data) {
   if (field.offset + field.elem_size * field.elem_count > data.size) {
     return "";
   }
   std::string s;
   const char* p = data.data + field.offset;
   for (size_t i = 0; i < field.elem_count; i++) {
     if (i != 0) {
       s.push_back(' ');
     }
     ExtractIntFieldFromPointer<T>(field, p);
     p += field.elem_size;
   }
   return s;
 }

 std::string ExtractUnknownField(const TracingField& field, const PerfSampleRawType& data) {
   size_t total = field.elem_size * field.elem_count;
   if (field.offset + total > data.size) {
     return "";
   }
   uint32_t value;
   std::string s;
   const char* p = data.data + field.offset;
   for (size_t i = 0; i + sizeof(value) <= total; i += sizeof(value)) {
     if (i != 0) {
       s.push_back(' ');
     }
     MoveFromBinaryFormat(value, p);
     s += android::base::StringPrintf("0x%08x", value);
   }
   return s;
 }

 ExtractFieldFn GetExtractFieldFunction(const TracingField& field) {
   if (field.is_dynamic) {
     return ExtractDynamicStringField;
   }
   if (field.elem_count > 1 && field.elem_size == 1) {
     // Probably the field is a string.
     // Don't use field.is_signed, which has different values on x86 and arm.
     return ExtractStringField;
   }
   if (field.elem_count == 1) {
     switch (field.elem_size) {
       case 1:
         return ExtractIntField<int8_t>;
       case 2:
         return ExtractIntField<int16_t>;
       case 4:
         return ExtractIntField<int32_t>;
       case 8:
         return ExtractIntField<int64_t>;
     }
   } else {
     switch (field.elem_size) {
       case 1:
         return ExtractIntArrayField<int8_t>;
       case 2:
         return ExtractIntArrayField<int16_t>;
       case 4:
         return ExtractIntArrayField<int32_t>;
       case 8:
         return ExtractIntArrayField<int64_t>;
     }
   }
   return ExtractUnknownField;
 }

 class DumpRecordCommand : public Command {
  public:
   DumpRecordCommand()
       : Command("dump", "dump perf record file",
                 // clang-format off
 "Usage: simpleperf dumprecord [options] [perf_record_file]\n"
 "    Dump different parts of a perf record file. Default file is perf.data.\n"
 "--dump-etm type1,type2,...   Dump etm data. A type is one of raw, packet and element.\n"
 "-i <record_file>             Record file to dump. Default is perf.data.\n"
 "--symdir <dir>               Look for binaries in a directory recursively.\n"
                 // clang-format on
         ) {}

   bool Run(const std::vector<std::string>& args);

  private:
   bool ParseOptions(const std::vector<std::string>& args);
   void DumpFileHeader();
   void DumpAttrSection();
   bool DumpDataSection();
   bool ProcessRecord(Record* r);
   void ProcessSampleRecord(const SampleRecord& r);
   void ProcessCallChainRecord(const CallChainRecord& r);
   SymbolInfo GetSymbolInfo(uint32_t pid, uint32_t tid, uint64_t ip, bool in_kernel);
   void ProcessTracingData(const TracingDataRecord& r);
   bool DumpAuxData(const AuxRecord& aux);
   bool DumpFeatureSection();

   // options
   std::string record_filename_ = "perf.data";
   ETMDumpOption etm_dump_option_;

   std::unique_ptr<RecordFileReader> record_file_reader_;
   std::unique_ptr<ETMDecoder> etm_decoder_;
   ThreadTree thread_tree_;

   std::vector<EventInfo> events_;
 };

 bool DumpRecordCommand::Run(const std::vector<std::string>& args) {
   if (!ParseOptions(args)) {
     return false;
   }
   record_file_reader_ = RecordFileReader::CreateInstance(record_filename_);
   if (record_file_reader_ == nullptr) {
     return false;
   }
   DumpFileHeader();
   DumpAttrSection();
   if (!DumpDataSection()) {
     return false;
   }
   return DumpFeatureSection();
 }

 bool DumpRecordCommand::ParseOptions(const std::vector<std::string>& args) {
   const OptionFormatMap option_formats = {
       {"--dump-etm", {OptionValueType::STRING, OptionType::SINGLE}},
       {"-i", {OptionValueType::STRING, OptionType::SINGLE}},
       {"--symdir", {OptionValueType::STRING, OptionType::MULTIPLE}},
   };
   OptionValueMap options;
   std::vector<std::pair<OptionName, OptionValue>> ordered_options;
   std::vector<std::string> non_option_args;
   if (!PreprocessOptions(args, option_formats, &options, &ordered_options, &non_option_args)) {
     return false;
   }
   if (auto value = options.PullValue("--dump-etm"); value) {
     if (!ParseEtmDumpOption(*value->str_value, &etm_dump_option_)) {
       return false;
     }
   }
   options.PullStringValue("-i", &record_filename_);
   for (const OptionValue& value : options.PullValues("--symdir")) {
     if (!Dso::AddSymbolDir(*value.str_value)) {
       return false;
     }
   }
   CHECK(options.values.empty());
   if (non_option_args.size() > 1) {
     LOG(ERROR) << "too many record files";
     return false;
   }
   if (non_option_args.size() == 1) {
     record_filename_ = non_option_args[0];
   }
   return true;
 }

 static const std::string GetFeatureNameOrUnknown(int feature) {
   std::string name = GetFeatureName(feature);
   return name.empty() ? android::base::StringPrintf("unknown_feature(%d)", feature) : name;
 }

 void DumpRecordCommand::DumpFileHeader() {
   const FileHeader& header = record_file_reader_->FileHeader();
   printf("magic: ");
   for (size_t i = 0; i < 8; ++i) {
     printf("%c", header.magic[i]);
   }
   printf("\n");
   printf("header_size: %" PRId64 "\n", header.header_size);
   if (header.header_size != sizeof(header)) {
     PLOG(WARNING) << "record file header size " << header.header_size
                   << "doesn't match expected header size " << sizeof(header);
   }
   printf("attr_size: %" PRId64 "\n", header.attr_size);
   printf("attrs[file section]: offset %" PRId64 ", size %" PRId64 "\n", header.attrs.offset,
          header.attrs.size);
   printf("data[file section]: offset %" PRId64 ", size %" PRId64 "\n", header.data.offset,
          header.data.size);
   printf("event_types[file section]: offset %" PRId64 ", size %" PRId64 "\n",
          header.event_types.offset, header.event_types.size);

   std::vector<int> features;
   for (size_t i = 0; i < FEAT_MAX_NUM; ++i) {
     size_t j = i / 8;
     size_t k = i % 8;
     if ((header.features[j] & (1 << k)) != 0) {
       features.push_back(i);
     }
   }
   for (auto& feature : features) {
     printf("feature: %s\n", GetFeatureNameOrUnknown(feature).c_str());
   }
 }

 void DumpRecordCommand::DumpAttrSection() {
   std::vector<EventAttrWithId> attrs = record_file_reader_->AttrSection();
   for (size_t i = 0; i < attrs.size(); ++i) {
     const auto& attr = attrs[i];
     printf("attr %zu:\n", i + 1);
     DumpPerfEventAttr(*attr.attr, 1);
     if (!attr.ids.empty()) {
       printf("  ids:");
       for (const auto& id : attr.ids) {
         printf(" %" PRId64, id);
       }
       printf("\n");
     }
   }
 }

 bool DumpRecordCommand::DumpDataSection() {
   thread_tree_.ShowIpForUnknownSymbol();
   record_file_reader_->LoadBuildIdAndFileFeatures(thread_tree_);

   auto record_callback = [&](std::unique_ptr<Record> r) { return ProcessRecord(r.get()); };
   return record_file_reader_->ReadDataSection(record_callback);
 }

 bool DumpRecordCommand::ProcessRecord(Record* r) {
   r->Dump();
   thread_tree_.Update(*r);

   bool res = true;
   switch (r->type()) {
     case PERF_RECORD_SAMPLE:
       ProcessSampleRecord(*static_cast<SampleRecord*>(r));
       break;
     case SIMPLE_PERF_RECORD_CALLCHAIN:
       ProcessCallChainRecord(*static_cast<CallChainRecord*>(r));
       break;
     case PERF_RECORD_AUXTRACE_INFO: {
       etm_decoder_ = ETMDecoder::Create(*static_cast<AuxTraceInfoRecord*>(r), thread_tree_);
       if (etm_decoder_) {
         etm_decoder_->EnableDump(etm_dump_option_);
       } else {
         res = false;
       }
       break;
     }
     case PERF_RECORD_AUX: {
       res = DumpAuxData(*static_cast<AuxRecord*>(r));
       break;
     }
     case PERF_RECORD_TRACING_DATA:
     case SIMPLE_PERF_RECORD_TRACING_DATA: {
       ProcessTracingData(*static_cast<TracingDataRecord*>(r));
       break;
     }
   }
   return res;
 }

 void DumpRecordCommand::ProcessSampleRecord(const SampleRecord& sr) {
   bool in_kernel = sr.InKernel();
   if (sr.sample_type & PERF_SAMPLE_CALLCHAIN) {
     PrintIndented(1, "callchain:\n");
     for (size_t i = 0; i < sr.callchain_data.ip_nr; ++i) {
       if (sr.callchain_data.ips[i] >= PERF_CONTEXT_MAX) {
         if (sr.callchain_data.ips[i] == PERF_CONTEXT_USER) {
           in_kernel = false;
         }
         continue;
       }
       SymbolInfo s =
           GetSymbolInfo(sr.tid_data.pid, sr.tid_data.tid, sr.callchain_data.ips[i], in_kernel);
       PrintIndented(2, "%s (%s[+%" PRIx64 "])\n", s.symbol->DemangledName(), s.dso->Path().c_str(),
                     s.vaddr_in_file);
     }
   }
   // Dump tracepoint fields.
   if (!events_.empty()) {
     size_t attr_index = record_file_reader_->GetAttrIndexOfRecord(&sr);
     auto& event = events_[attr_index];
     if (event.tp_data_size > 0 && sr.raw_data.size >= event.tp_data_size) {
       PrintIndented(1, "tracepoint fields:\n");
       for (size_t i = 0; i < event.tp_fields.size(); i++) {
         auto& field = event.tp_fields[i];
         std::string s = event.extract_field_functions[i](field, sr.raw_data);
         PrintIndented(2, "%s: %s\n", field.name.c_str(), s.c_str());
       }
     }
   }
 }

 void DumpRecordCommand::ProcessCallChainRecord(const CallChainRecord& cr) {
   PrintIndented(1, "callchain:\n");
   for (size_t i = 0; i < cr.ip_nr; ++i) {
     SymbolInfo s = GetSymbolInfo(cr.pid, cr.tid, cr.ips[i], false);
     PrintIndented(2, "%s (%s[+%" PRIx64 "])\n", s.symbol->DemangledName(), s.dso->Path().c_str(),
                   s.vaddr_in_file);
   }
 }

 SymbolInfo DumpRecordCommand::GetSymbolInfo(uint32_t pid, uint32_t tid, uint64_t ip,
                                             bool in_kernel) {
   ThreadEntry* thread = thread_tree_.FindThreadOrNew(pid, tid);
   const MapEntry* map = thread_tree_.FindMap(thread, ip, in_kernel);
   SymbolInfo info;
   info.symbol = thread_tree_.FindSymbol(map, ip, &info.vaddr_in_file, &info.dso);
   return info;
 }

 bool DumpRecordCommand::DumpAuxData(const AuxRecord& aux) {
   size_t size = aux.data->aux_size;
   if (size > 0) {
     std::unique_ptr<uint8_t[]> data(new uint8_t[size]);
     if (!record_file_reader_->ReadAuxData(aux.Cpu(), aux.data->aux_offset, data.get(), size)) {
       return false;
     }
     return etm_decoder_->ProcessData(data.get(), size, !aux.Unformatted(), aux.Cpu());
   }
   return true;
 }

 void DumpRecordCommand::ProcessTracingData(const TracingDataRecord& r) {
   Tracing tracing(std::vector<char>(r.data, r.data + r.data_size));
   std::vector<EventAttrWithId> attrs = record_file_reader_->AttrSection();
   events_.resize(attrs.size());
   for (size_t i = 0; i < attrs.size(); i++) {
     auto& attr = attrs[i].attr;
     auto& event = events_[i];

     if (attr->type != PERF_TYPE_TRACEPOINT) {
       continue;
     }
     TracingFormat format = tracing.GetTracingFormatHavingId(attr->config);
     event.tp_fields = format.fields;
     // Decide dump function for each field.
     for (size_t j = 0; j < event.tp_fields.size(); j++) {
       auto& field = event.tp_fields[j];
       event.extract_field_functions.push_back(GetExtractFieldFunction(field));
       event.tp_data_size += field.elem_count * field.elem_size;
     }
   }
 }

 bool DumpRecordCommand::DumpFeatureSection() {
   std::map<int, SectionDesc> section_map = record_file_reader_->FeatureSectionDescriptors();
   for (const auto& pair : section_map) {
     int feature = pair.first;
     const auto& section = pair.second;
     printf("feature section for %s: offset %" PRId64 ", size %" PRId64 "\n",
            GetFeatureNameOrUnknown(feature).c_str(), section.offset, section.size);
     if (feature == FEAT_BUILD_ID) {
       std::vector<BuildIdRecord> records = record_file_reader_->ReadBuildIdFeature();
       for (auto& r : records) {
         r.Dump(1);
       }
     } else if (feature == FEAT_OSRELEASE) {
       std::string s = record_file_reader_->ReadFeatureString(feature);
       PrintIndented(1, "osrelease: %s\n", s.c_str());
     } else if (feature == FEAT_ARCH) {
       std::string s = record_file_reader_->ReadFeatureString(feature);
       PrintIndented(1, "arch: %s\n", s.c_str());
     } else if (feature == FEAT_CMDLINE) {
       std::vector<std::string> cmdline = record_file_reader_->ReadCmdlineFeature();
       PrintIndented(1, "cmdline: %s\n", android::base::Join(cmdline, ' ').c_str());
     } else if (feature == FEAT_FILE || feature == FEAT_FILE2) {
       FileFeature file;
       size_t read_pos = 0;
       PrintIndented(1, "file:\n");
       while (record_file_reader_->ReadFileFeature(read_pos, &file)) {
         PrintIndented(2, "file_path %s\n", file.path.c_str());
         PrintIndented(2, "file_type %s\n", DsoTypeToString(file.type));
         PrintIndented(2, "min_vaddr 0x%" PRIx64 "\n", file.min_vaddr);
         PrintIndented(2, "file_offset_of_min_vaddr 0x%" PRIx64 "\n", file.file_offset_of_min_vaddr);
         PrintIndented(2, "symbols:\n");
         for (const auto& symbol : file.symbols) {
           PrintIndented(3, "%s [0x%" PRIx64 "-0x%" PRIx64 "]\n", symbol.DemangledName(),
                         symbol.addr, symbol.addr + symbol.len);
         }
         if (file.type == DSO_DEX_FILE) {
           PrintIndented(2, "dex_file_offsets:\n");
           for (uint64_t offset : file.dex_file_offsets) {
             PrintIndented(3, "0x%" PRIx64 "\n", offset);
           }
         }
       }
     } else if (feature == FEAT_META_INFO) {
       PrintIndented(1, "meta_info:\n");
       for (auto& pair : record_file_reader_->GetMetaInfoFeature()) {
         PrintIndented(2, "%s = %s\n", pair.first.c_str(), pair.second.c_str());
       }
     } else if (feature == FEAT_AUXTRACE) {
       PrintIndented(1, "file_offsets_of_auxtrace_records:\n");
       for (auto offset : record_file_reader_->ReadAuxTraceFeature()) {
         PrintIndented(2, "%" PRIu64 "\n", offset);
       }
     } else if (feature == FEAT_DEBUG_UNWIND) {
       PrintIndented(1, "debug_unwind:\n");
       if (auto opt_debug_unwind = record_file_reader_->ReadDebugUnwindFeature(); opt_debug_unwind) {
         for (const DebugUnwindFile& file : opt_debug_unwind.value()) {
           PrintIndented(2, "path: %s\n", file.path.c_str());
           PrintIndented(2, "size: %" PRIu64 "\n", file.size);
         }
       }
     }
   }
   return true;
 }

 }  // namespace

 void RegisterDumpRecordCommand() {
   RegisterCommand("dump", [] { return std::unique_ptr<Command>(new DumpRecordCommand); });
 }

 }  // namespace simpleperf
	/*
	* Copyright (C) 2015 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	#include <inttypes.h>

	#include <map>
	#include <string>
	#include <type_traits>
	#include <vector>

	#include <android-base/logging.h>
	#include <android-base/stringprintf.h>
	#include <android-base/strings.h>

	#include "ETMDecoder.h"
	#include "command.h"
	#include "dso.h"
	#include "event_attr.h"
	#include "event_type.h"
	#include "perf_regs.h"
	#include "record.h"
	#include "record_file.h"
	#include "tracing.h"
	#include "utils.h"

	namespace simpleperf {
	namespace {

	using namespace PerfFileFormat;

	struct SymbolInfo {
	Dso* dso;
	const Symbol* symbol;
	uint64_t vaddr_in_file;
	};

	using ExtractFieldFn = std::function<std::string(const TracingField&, const PerfSampleRawType&)>;

	struct EventInfo {
	size_t tp_data_size = 0;
	std::vector<TracingField> tp_fields;
	std::vector<ExtractFieldFn> extract_field_functions;
	};

	std::string ExtractStringField(const TracingField& field, const PerfSampleRawType& data) {
	std::string s;
	// data points to a char [field.elem_count] array. It is not guaranteed to be ended
	// with '\0'. So need to copy from data like strncpy.
	size_t max_len = std::min(data.size - field.offset, field.elem_count);
	const char* p = data.data + field.offset;
	for (size_t i = 0; i < max_len && *p != '\0'; i++) {
	s.push_back(*p++);
	}
	return s;
	}

	std::string ExtractDynamicStringField(const TracingField& field, const PerfSampleRawType& data) {
	std::string s;
	const char* p = data.data + field.offset;
	if (field.elem_size != 4 \|\| field.offset + field.elem_size > data.size) {
	return s;
	}
	uint32_t location;
	MoveFromBinaryFormat(location, p);
	// Parse location: (max_len << 16) \| off.
	uint32_t offset = location & 0xffff;
	uint32_t max_len = location >> 16;
	if (offset + max_len <= data.size) {
	p = data.data + offset;
	for (size_t i = 0; i < max_len && *p != '\0'; i++) {
	s.push_back(*p++);
	}
	}
	return s;
	}

	template <typename T, typename UT = typename std::make_unsigned<T>::type>
	std::string ExtractIntFieldFromPointer(const TracingField& field, const char* p) {
	static_assert(std::is_signed<T>::value);
	T value;
	MoveFromBinaryFormat(value, p);

	if (field.is_signed) {
	return android::base::StringPrintf("%" PRId64, static_cast<int64_t>(value));
	}
	return android::base::StringPrintf("0x%" PRIx64, static_cast<uint64_t>(static_cast<UT>(value)));
	}

	template <typename T>
	std::string ExtractIntField(const TracingField& field, const PerfSampleRawType& data) {
	if (field.offset + sizeof(T) > data.size) {
	return "";
	}
	return ExtractIntFieldFromPointer<T>(field, data.data + field.offset);
	}

	template <typename T>
	std::string ExtractIntArrayField(const TracingField& field, const PerfSampleRawType& data) {
	if (field.offset + field.elem_size * field.elem_count > data.size) {
	return "";
	}
	std::string s;
	const char* p = data.data + field.offset;
	for (size_t i = 0; i < field.elem_count; i++) {
	if (i != 0) {
	s.push_back(' ');
	}
	ExtractIntFieldFromPointer<T>(field, p);
	p += field.elem_size;
	}
	return s;
	}

	std::string ExtractUnknownField(const TracingField& field, const PerfSampleRawType& data) {
	size_t total = field.elem_size * field.elem_count;
	if (field.offset + total > data.size) {
	return "";
	}
	uint32_t value;
	std::string s;
	const char* p = data.data + field.offset;
	for (size_t i = 0; i + sizeof(value) <= total; i += sizeof(value)) {
	if (i != 0) {
	s.push_back(' ');
	}
	MoveFromBinaryFormat(value, p);
	s += android::base::StringPrintf("0x%08x", value);
	}
	return s;
	}

	ExtractFieldFn GetExtractFieldFunction(const TracingField& field) {
	if (field.is_dynamic) {
	return ExtractDynamicStringField;
	}
	if (field.elem_count > 1 && field.elem_size == 1) {
	// Probably the field is a string.
	// Don't use field.is_signed, which has different values on x86 and arm.
	return ExtractStringField;
	}
	if (field.elem_count == 1) {
	switch (field.elem_size) {
	case 1:
	return ExtractIntField<int8_t>;
	case 2:
	return ExtractIntField<int16_t>;
	case 4:
	return ExtractIntField<int32_t>;
	case 8:
	return ExtractIntField<int64_t>;
	}
	} else {
	switch (field.elem_size) {
	case 1:
	return ExtractIntArrayField<int8_t>;
	case 2:
	return ExtractIntArrayField<int16_t>;
	case 4:
	return ExtractIntArrayField<int32_t>;
	case 8:
	return ExtractIntArrayField<int64_t>;
	}
	}
	return ExtractUnknownField;
	}

	class DumpRecordCommand : public Command {
	public:
	DumpRecordCommand()
	: Command("dump", "dump perf record file",
	// clang-format off
	"Usage: simpleperf dumprecord [options] [perf_record_file]\n"
	" Dump different parts of a perf record file. Default file is perf.data.\n"
	"--dump-etm type1,type2,... Dump etm data. A type is one of raw, packet and element.\n"
	"-i <record_file> Record file to dump. Default is perf.data.\n"
	"--symdir <dir> Look for binaries in a directory recursively.\n"
	// clang-format on
	) {}

	bool Run(const std::vector<std::string>& args);

	private:
	bool ParseOptions(const std::vector<std::string>& args);
	void DumpFileHeader();
	void DumpAttrSection();
	bool DumpDataSection();
	bool ProcessRecord(Record* r);
	void ProcessSampleRecord(const SampleRecord& r);
	void ProcessCallChainRecord(const CallChainRecord& r);
	SymbolInfo GetSymbolInfo(uint32_t pid, uint32_t tid, uint64_t ip, bool in_kernel);
	void ProcessTracingData(const TracingDataRecord& r);
	bool DumpAuxData(const AuxRecord& aux);
	bool DumpFeatureSection();

	// options
	std::string record_filename_ = "perf.data";
	ETMDumpOption etm_dump_option_;

	std::unique_ptr<RecordFileReader> record_file_reader_;
	std::unique_ptr<ETMDecoder> etm_decoder_;
	ThreadTree thread_tree_;

	std::vector<EventInfo> events_;
	};

	bool DumpRecordCommand::Run(const std::vector<std::string>& args) {
	if (!ParseOptions(args)) {
	return false;
	}
	record_file_reader_ = RecordFileReader::CreateInstance(record_filename_);
	if (record_file_reader_ == nullptr) {
	return false;
	}
	DumpFileHeader();
	DumpAttrSection();
	if (!DumpDataSection()) {
	return false;
	}
	return DumpFeatureSection();
	}

	bool DumpRecordCommand::ParseOptions(const std::vector<std::string>& args) {
	const OptionFormatMap option_formats = {
	{"--dump-etm", {OptionValueType::STRING, OptionType::SINGLE}},
	{"-i", {OptionValueType::STRING, OptionType::SINGLE}},
	{"--symdir", {OptionValueType::STRING, OptionType::MULTIPLE}},
	};
	OptionValueMap options;
	std::vector<std::pair<OptionName, OptionValue>> ordered_options;
	std::vector<std::string> non_option_args;
	if (!PreprocessOptions(args, option_formats, &options, &ordered_options, &non_option_args)) {
	return false;
	}
	if (auto value = options.PullValue("--dump-etm"); value) {
	if (!ParseEtmDumpOption(*value->str_value, &etm_dump_option_)) {
	return false;
	}
	}
	options.PullStringValue("-i", &record_filename_);
	for (const OptionValue& value : options.PullValues("--symdir")) {
	if (!Dso::AddSymbolDir(*value.str_value)) {
	return false;
	}
	}
	CHECK(options.values.empty());
	if (non_option_args.size() > 1) {
	LOG(ERROR) << "too many record files";
	return false;
	}
	if (non_option_args.size() == 1) {
	record_filename_ = non_option_args[0];
	}
	return true;
	}

	static const std::string GetFeatureNameOrUnknown(int feature) {
	std::string name = GetFeatureName(feature);
	return name.empty() ? android::base::StringPrintf("unknown_feature(%d)", feature) : name;
	}

	void DumpRecordCommand::DumpFileHeader() {
	const FileHeader& header = record_file_reader_->FileHeader();
	printf("magic: ");
	for (size_t i = 0; i < 8; ++i) {
	printf("%c", header.magic[i]);
	}
	printf("\n");
	printf("header_size: %" PRId64 "\n", header.header_size);
	if (header.header_size != sizeof(header)) {
	PLOG(WARNING) << "record file header size " << header.header_size
	<< "doesn't match expected header size " << sizeof(header);
	}
	printf("attr_size: %" PRId64 "\n", header.attr_size);
	printf("attrs[file section]: offset %" PRId64 ", size %" PRId64 "\n", header.attrs.offset,
	header.attrs.size);
	printf("data[file section]: offset %" PRId64 ", size %" PRId64 "\n", header.data.offset,
	header.data.size);
	printf("event_types[file section]: offset %" PRId64 ", size %" PRId64 "\n",
	header.event_types.offset, header.event_types.size);

	std::vector<int> features;
	for (size_t i = 0; i < FEAT_MAX_NUM; ++i) {
	size_t j = i / 8;
	size_t k = i % 8;
	if ((header.features[j] & (1 << k)) != 0) {
	features.push_back(i);
	}
	}
	for (auto& feature : features) {
	printf("feature: %s\n", GetFeatureNameOrUnknown(feature).c_str());
	}
	}

	void DumpRecordCommand::DumpAttrSection() {
	std::vector<EventAttrWithId> attrs = record_file_reader_->AttrSection();
	for (size_t i = 0; i < attrs.size(); ++i) {
	const auto& attr = attrs[i];
	printf("attr %zu:\n", i + 1);
	DumpPerfEventAttr(*attr.attr, 1);
	if (!attr.ids.empty()) {
	printf(" ids:");
	for (const auto& id : attr.ids) {
	printf(" %" PRId64, id);
	}
	printf("\n");
	}
	}
	}

	bool DumpRecordCommand::DumpDataSection() {
	thread_tree_.ShowIpForUnknownSymbol();
	record_file_reader_->LoadBuildIdAndFileFeatures(thread_tree_);

	auto record_callback = [&](std::unique_ptr<Record> r) { return ProcessRecord(r.get()); };
	return record_file_reader_->ReadDataSection(record_callback);
	}

	bool DumpRecordCommand::ProcessRecord(Record* r) {
	r->Dump();
	thread_tree_.Update(*r);

	bool res = true;
	switch (r->type()) {
	case PERF_RECORD_SAMPLE:
	ProcessSampleRecord(static_cast<SampleRecord>(r));
	break;
	case SIMPLE_PERF_RECORD_CALLCHAIN:
	ProcessCallChainRecord(static_cast<CallChainRecord>(r));
	break;
	case PERF_RECORD_AUXTRACE_INFO: {
	etm_decoder_ = ETMDecoder::Create(static_cast<AuxTraceInfoRecord>(r), thread_tree_);
	if (etm_decoder_) {
	etm_decoder_->EnableDump(etm_dump_option_);
	} else {
	res = false;
	}
	break;
	}
	case PERF_RECORD_AUX: {
	res = DumpAuxData(static_cast<AuxRecord>(r));
	break;
	}
	case PERF_RECORD_TRACING_DATA:
	case SIMPLE_PERF_RECORD_TRACING_DATA: {
	ProcessTracingData(static_cast<TracingDataRecord>(r));
	break;
	}
	}
	return res;
	}

	void DumpRecordCommand::ProcessSampleRecord(const SampleRecord& sr) {
	bool in_kernel = sr.InKernel();
	if (sr.sample_type & PERF_SAMPLE_CALLCHAIN) {
	PrintIndented(1, "callchain:\n");
	for (size_t i = 0; i < sr.callchain_data.ip_nr; ++i) {
	if (sr.callchain_data.ips[i] >= PERF_CONTEXT_MAX) {
	if (sr.callchain_data.ips[i] == PERF_CONTEXT_USER) {
	in_kernel = false;
	}
	continue;
	}
	SymbolInfo s =
	GetSymbolInfo(sr.tid_data.pid, sr.tid_data.tid, sr.callchain_data.ips[i], in_kernel);
	PrintIndented(2, "%s (%s[+%" PRIx64 "])\n", s.symbol->DemangledName(), s.dso->Path().c_str(),
	s.vaddr_in_file);
	}
	}
	// Dump tracepoint fields.
	if (!events_.empty()) {
	size_t attr_index = record_file_reader_->GetAttrIndexOfRecord(&sr);
	auto& event = events_[attr_index];
	if (event.tp_data_size > 0 && sr.raw_data.size >= event.tp_data_size) {
	PrintIndented(1, "tracepoint fields:\n");
	for (size_t i = 0; i < event.tp_fields.size(); i++) {
	auto& field = event.tp_fields[i];
	std::string s = event.extract_field_functions[i](field, sr.raw_data);
	PrintIndented(2, "%s: %s\n", field.name.c_str(), s.c_str());
	}
	}
	}
	}

	void DumpRecordCommand::ProcessCallChainRecord(const CallChainRecord& cr) {
	PrintIndented(1, "callchain:\n");
	for (size_t i = 0; i < cr.ip_nr; ++i) {
	SymbolInfo s = GetSymbolInfo(cr.pid, cr.tid, cr.ips[i], false);
	PrintIndented(2, "%s (%s[+%" PRIx64 "])\n", s.symbol->DemangledName(), s.dso->Path().c_str(),
	s.vaddr_in_file);
	}
	}

	SymbolInfo DumpRecordCommand::GetSymbolInfo(uint32_t pid, uint32_t tid, uint64_t ip,
	bool in_kernel) {
	ThreadEntry* thread = thread_tree_.FindThreadOrNew(pid, tid);
	const MapEntry* map = thread_tree_.FindMap(thread, ip, in_kernel);
	SymbolInfo info;
	info.symbol = thread_tree_.FindSymbol(map, ip, &info.vaddr_in_file, &info.dso);
	return info;
	}

	bool DumpRecordCommand::DumpAuxData(const AuxRecord& aux) {
	size_t size = aux.data->aux_size;
	if (size > 0) {
	std::unique_ptr<uint8_t[]> data(new uint8_t[size]);
	if (!record_file_reader_->ReadAuxData(aux.Cpu(), aux.data->aux_offset, data.get(), size)) {
	return false;
	}
	return etm_decoder_->ProcessData(data.get(), size, !aux.Unformatted(), aux.Cpu());
	}
	return true;
	}

	void DumpRecordCommand::ProcessTracingData(const TracingDataRecord& r) {
	Tracing tracing(std::vector<char>(r.data, r.data + r.data_size));
	std::vector<EventAttrWithId> attrs = record_file_reader_->AttrSection();
	events_.resize(attrs.size());
	for (size_t i = 0; i < attrs.size(); i++) {
	auto& attr = attrs[i].attr;
	auto& event = events_[i];

	if (attr->type != PERF_TYPE_TRACEPOINT) {
	continue;
	}
	TracingFormat format = tracing.GetTracingFormatHavingId(attr->config);
	event.tp_fields = format.fields;
	// Decide dump function for each field.
	for (size_t j = 0; j < event.tp_fields.size(); j++) {
	auto& field = event.tp_fields[j];
	event.extract_field_functions.push_back(GetExtractFieldFunction(field));
	event.tp_data_size += field.elem_count * field.elem_size;
	}
	}
	}

	bool DumpRecordCommand::DumpFeatureSection() {
	std::map<int, SectionDesc> section_map = record_file_reader_->FeatureSectionDescriptors();
	for (const auto& pair : section_map) {
	int feature = pair.first;
	const auto& section = pair.second;
	printf("feature section for %s: offset %" PRId64 ", size %" PRId64 "\n",
	GetFeatureNameOrUnknown(feature).c_str(), section.offset, section.size);
	if (feature == FEAT_BUILD_ID) {
	std::vector<BuildIdRecord> records = record_file_reader_->ReadBuildIdFeature();
	for (auto& r : records) {
	r.Dump(1);
	}
	} else if (feature == FEAT_OSRELEASE) {
	std::string s = record_file_reader_->ReadFeatureString(feature);
	PrintIndented(1, "osrelease: %s\n", s.c_str());
	} else if (feature == FEAT_ARCH) {
	std::string s = record_file_reader_->ReadFeatureString(feature);
	PrintIndented(1, "arch: %s\n", s.c_str());
	} else if (feature == FEAT_CMDLINE) {
	std::vector<std::string> cmdline = record_file_reader_->ReadCmdlineFeature();
	PrintIndented(1, "cmdline: %s\n", android::base::Join(cmdline, ' ').c_str());
	} else if (feature == FEAT_FILE \|\| feature == FEAT_FILE2) {
	FileFeature file;
	size_t read_pos = 0;
	PrintIndented(1, "file:\n");
	while (record_file_reader_->ReadFileFeature(read_pos, &file)) {
	PrintIndented(2, "file_path %s\n", file.path.c_str());
	PrintIndented(2, "file_type %s\n", DsoTypeToString(file.type));
	PrintIndented(2, "min_vaddr 0x%" PRIx64 "\n", file.min_vaddr);
	PrintIndented(2, "file_offset_of_min_vaddr 0x%" PRIx64 "\n", file.file_offset_of_min_vaddr);
	PrintIndented(2, "symbols:\n");
	for (const auto& symbol : file.symbols) {
	PrintIndented(3, "%s [0x%" PRIx64 "-0x%" PRIx64 "]\n", symbol.DemangledName(),
	symbol.addr, symbol.addr + symbol.len);
	}
	if (file.type == DSO_DEX_FILE) {
	PrintIndented(2, "dex_file_offsets:\n");
	for (uint64_t offset : file.dex_file_offsets) {
	PrintIndented(3, "0x%" PRIx64 "\n", offset);
	}
	}
	}
	} else if (feature == FEAT_META_INFO) {
	PrintIndented(1, "meta_info:\n");
	for (auto& pair : record_file_reader_->GetMetaInfoFeature()) {
	PrintIndented(2, "%s = %s\n", pair.first.c_str(), pair.second.c_str());
	}
	} else if (feature == FEAT_AUXTRACE) {
	PrintIndented(1, "file_offsets_of_auxtrace_records:\n");
	for (auto offset : record_file_reader_->ReadAuxTraceFeature()) {
	PrintIndented(2, "%" PRIu64 "\n", offset);
	}
	} else if (feature == FEAT_DEBUG_UNWIND) {
	PrintIndented(1, "debug_unwind:\n");
	if (auto opt_debug_unwind = record_file_reader_->ReadDebugUnwindFeature(); opt_debug_unwind) {
	for (const DebugUnwindFile& file : opt_debug_unwind.value()) {
	PrintIndented(2, "path: %s\n", file.path.c_str());
	PrintIndented(2, "size: %" PRIu64 "\n", file.size);
	}
	}
	}
	}
	return true;
	}

	} // namespace

	void RegisterDumpRecordCommand() {
	RegisterCommand("dump", [] { return std::unique_ptr<Command>(new DumpRecordCommand); });
	}

	} // namespace simpleperf