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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 "sql/connection_memory_dump_provider.h"
#include "base/strings/stringprintf.h"
#include "base/trace_event/process_memory_dump.h"
#include "third_party/sqlite/sqlite3.h"
namespace sql {
ConnectionMemoryDumpProvider::ConnectionMemoryDumpProvider(
sqlite3* db,
const std::string& name)
: db_(db), connection_name_(name) {}
ConnectionMemoryDumpProvider::~ConnectionMemoryDumpProvider() {}
void ConnectionMemoryDumpProvider::ResetDatabase() {
base::AutoLock lock(lock_);
db_ = nullptr;
}
bool ConnectionMemoryDumpProvider::OnMemoryDump(
const base::trace_event::MemoryDumpArgs& args,
base::trace_event::ProcessMemoryDump* pmd) {
if (args.level_of_detail == base::trace_event::MemoryDumpLevelOfDetail::LIGHT)
return true;
int cache_size = 0;
int schema_size = 0;
int statement_size = 0;
{
// Lock is acquired here so that db_ is not reset in ResetDatabase when
// collecting stats.
base::AutoLock lock(lock_);
if (!db_) {
return false;
}
// The high water mark is not tracked for the following usages.
int dummy_int;
int status = sqlite3_db_status(db_, SQLITE_DBSTATUS_CACHE_USED, &cache_size,
&dummy_int, 0 /* resetFlag */);
DCHECK_EQ(SQLITE_OK, status);
status = sqlite3_db_status(db_, SQLITE_DBSTATUS_SCHEMA_USED, &schema_size,
&dummy_int, 0 /* resetFlag */);
DCHECK_EQ(SQLITE_OK, status);
status = sqlite3_db_status(db_, SQLITE_DBSTATUS_STMT_USED, &statement_size,
&dummy_int, 0 /* resetFlag */);
DCHECK_EQ(SQLITE_OK, status);
}
std::string name = base::StringPrintf(
"sqlite/%s_connection/%p",
connection_name_.empty() ? "Unknown" : connection_name_.c_str(), this);
base::trace_event::MemoryAllocatorDump* dump = pmd->CreateAllocatorDump(name);
dump->AddScalar(base::trace_event::MemoryAllocatorDump::kNameSize,
base::trace_event::MemoryAllocatorDump::kUnitsBytes,
cache_size + schema_size + statement_size);
dump->AddScalar("cache_size",
base::trace_event::MemoryAllocatorDump::kUnitsBytes,
cache_size);
dump->AddScalar("schema_size",
base::trace_event::MemoryAllocatorDump::kUnitsBytes,
schema_size);
dump->AddScalar("statement_size",
base::trace_event::MemoryAllocatorDump::kUnitsBytes,
statement_size);
return true;
}
} // namespace sql
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