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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/trace_event/memory_allocator_dump.h"
#include "base/format_macros.h"
#include "base/strings/stringprintf.h"
#include "base/trace_event/memory_dump_manager.h"
#include "base/trace_event/memory_dump_provider.h"
#include "base/trace_event/process_memory_dump.h"
#include "base/trace_event/trace_event_argument.h"
#include "base/values.h"
namespace base {
namespace trace_event {
const char MemoryAllocatorDump::kNameSize[] = "size";
const char MemoryAllocatorDump::kNameObjectCount[] = "object_count";
const char MemoryAllocatorDump::kTypeScalar[] = "scalar";
const char MemoryAllocatorDump::kTypeString[] = "string";
const char MemoryAllocatorDump::kUnitsBytes[] = "bytes";
const char MemoryAllocatorDump::kUnitsObjects[] = "objects";
MemoryAllocatorDump::MemoryAllocatorDump(const std::string& absolute_name,
ProcessMemoryDump* process_memory_dump,
const MemoryAllocatorDumpGuid& guid)
: absolute_name_(absolute_name),
process_memory_dump_(process_memory_dump),
attributes_(new TracedValue),
guid_(guid),
flags_(Flags::DEFAULT) {
// The |absolute_name| cannot be empty.
DCHECK(!absolute_name.empty());
// The |absolute_name| can contain slash separator, but not leading or
// trailing ones.
DCHECK(absolute_name[0] != '/' && *absolute_name.rbegin() != '/');
}
// If the caller didn't provide a guid, make one up by hashing the
// absolute_name with the current PID.
// Rationale: |absolute_name| is already supposed to be unique within a
// process, the pid will make it unique among all processes.
MemoryAllocatorDump::MemoryAllocatorDump(const std::string& absolute_name,
ProcessMemoryDump* process_memory_dump)
: MemoryAllocatorDump(absolute_name,
process_memory_dump,
MemoryAllocatorDumpGuid(StringPrintf(
"%d:%s",
TraceLog::GetInstance()->process_id(),
absolute_name.c_str()))) {
string_conversion_buffer_.reserve(16);
}
MemoryAllocatorDump::~MemoryAllocatorDump() {
}
void MemoryAllocatorDump::AddScalar(const char* name,
const char* units,
uint64_t value) {
SStringPrintf(&string_conversion_buffer_, "%" PRIx64, value);
attributes_->BeginDictionary(name);
attributes_->SetString("type", kTypeScalar);
attributes_->SetString("units", units);
attributes_->SetString("value", string_conversion_buffer_);
attributes_->EndDictionary();
}
void MemoryAllocatorDump::AddScalarF(const char* name,
const char* units,
double value) {
attributes_->BeginDictionary(name);
attributes_->SetString("type", kTypeScalar);
attributes_->SetString("units", units);
attributes_->SetDouble("value", value);
attributes_->EndDictionary();
}
void MemoryAllocatorDump::AddString(const char* name,
const char* units,
const std::string& value) {
// String attributes are disabled in background mode.
if (process_memory_dump_->dump_args().level_of_detail ==
MemoryDumpLevelOfDetail::BACKGROUND) {
NOTREACHED();
return;
}
attributes_->BeginDictionary(name);
attributes_->SetString("type", kTypeString);
attributes_->SetString("units", units);
attributes_->SetString("value", value);
attributes_->EndDictionary();
}
void MemoryAllocatorDump::AsValueInto(TracedValue* value) const {
value->BeginDictionaryWithCopiedName(absolute_name_);
value->SetString("guid", guid_.ToString());
value->SetValue("attrs", *attributes_);
if (flags_)
value->SetInteger("flags", flags_);
value->EndDictionary(); // "allocator_name/heap_subheap": { ... }
}
} // namespace trace_event
} // namespace base
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