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| 1 // Copyright 2015 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "base/trace_event/memory_allocator_dump.h" | |
| 6 | |
| 7 #include "base/format_macros.h" | |
| 8 #include "base/strings/stringprintf.h" | |
| 9 #include "base/trace_event/memory_dump_manager.h" | |
| 10 #include "base/trace_event/memory_dump_provider.h" | |
| 11 #include "base/trace_event/process_memory_dump.h" | |
| 12 #include "base/trace_event/trace_event_argument.h" | |
| 13 #include "base/values.h" | |
| 14 | |
| 15 namespace base { | |
| 16 namespace trace_event { | |
| 17 | |
| 18 const char MemoryAllocatorDump::kNameSize[] = "size"; | |
| 19 const char MemoryAllocatorDump::kNameObjectsCount[] = "objects_count"; | |
| 20 const char MemoryAllocatorDump::kTypeScalar[] = "scalar"; | |
| 21 const char MemoryAllocatorDump::kTypeString[] = "string"; | |
| 22 const char MemoryAllocatorDump::kUnitsBytes[] = "bytes"; | |
| 23 const char MemoryAllocatorDump::kUnitsObjects[] = "objects"; | |
| 24 | |
| 25 MemoryAllocatorDump::MemoryAllocatorDump(const std::string& absolute_name, | |
| 26 ProcessMemoryDump* process_memory_dump, | |
| 27 const MemoryAllocatorDumpGuid& guid) | |
| 28 : absolute_name_(absolute_name), | |
| 29 process_memory_dump_(process_memory_dump), | |
| 30 attributes_(new TracedValue), | |
| 31 guid_(guid) { | |
| 32 // The |absolute_name| cannot be empty. | |
| 33 DCHECK(!absolute_name.empty()); | |
| 34 | |
| 35 // The |absolute_name| can contain slash separator, but not leading or | |
| 36 // trailing ones. | |
| 37 DCHECK(absolute_name[0] != '/' && *absolute_name.rbegin() != '/'); | |
| 38 | |
| 39 // Dots are not allowed anywhere as the underlying base::DictionaryValue | |
| 40 // would treat them magically and split in sub-nodes, which is not intended. | |
| 41 DCHECK_EQ(std::string::npos, absolute_name.find_first_of('.')); | |
| 42 } | |
| 43 | |
| 44 // If the caller didn't provide a guid, make one up by hashing the | |
| 45 // absolute_name with the current PID. | |
| 46 // Rationale: |absolute_name| is already supposed to be unique within a | |
| 47 // process, the pid will make it unique among all processes. | |
| 48 MemoryAllocatorDump::MemoryAllocatorDump(const std::string& absolute_name, | |
| 49 ProcessMemoryDump* process_memory_dump) | |
| 50 : MemoryAllocatorDump(absolute_name, | |
| 51 process_memory_dump, | |
| 52 MemoryAllocatorDumpGuid(StringPrintf( | |
| 53 "%d:%s", | |
| 54 TraceLog::GetInstance()->process_id(), | |
| 55 absolute_name.c_str()))) { | |
| 56 string_conversion_buffer_.reserve(16); | |
| 57 } | |
| 58 | |
| 59 MemoryAllocatorDump::~MemoryAllocatorDump() { | |
| 60 } | |
| 61 | |
| 62 void MemoryAllocatorDump::AddScalar(const char* name, | |
| 63 const char* units, | |
| 64 uint64 value) { | |
| 65 SStringPrintf(&string_conversion_buffer_, "%" PRIx64, value); | |
| 66 attributes_->BeginDictionary(name); | |
| 67 attributes_->SetString("type", kTypeScalar); | |
| 68 attributes_->SetString("units", units); | |
| 69 attributes_->SetString("value", string_conversion_buffer_); | |
| 70 attributes_->EndDictionary(); | |
| 71 } | |
| 72 | |
| 73 void MemoryAllocatorDump::AddScalarF(const char* name, | |
| 74 const char* units, | |
| 75 double value) { | |
| 76 attributes_->BeginDictionary(name); | |
| 77 attributes_->SetString("type", kTypeScalar); | |
| 78 attributes_->SetString("units", units); | |
| 79 attributes_->SetDouble("value", value); | |
| 80 attributes_->EndDictionary(); | |
| 81 } | |
| 82 | |
| 83 void MemoryAllocatorDump::AddString(const char* name, | |
| 84 const char* units, | |
| 85 const std::string& value) { | |
| 86 attributes_->BeginDictionary(name); | |
| 87 attributes_->SetString("type", kTypeString); | |
| 88 attributes_->SetString("units", units); | |
| 89 attributes_->SetString("value", value); | |
| 90 attributes_->EndDictionary(); | |
| 91 } | |
| 92 | |
| 93 void MemoryAllocatorDump::AsValueInto(TracedValue* value) const { | |
| 94 value->BeginDictionaryWithCopiedName(absolute_name_); | |
| 95 value->SetString("guid", guid_.ToString()); | |
| 96 value->SetValue("attrs", *attributes_); | |
| 97 value->EndDictionary(); // "allocator_name/heap_subheap": { ... } | |
| 98 } | |
| 99 | |
| 100 } // namespace trace_event | |
| 101 } // namespace base | |
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