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// Copyright (c) 2009 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 "chrome/browser/diagnostics/sqlite_diagnostics.h"
#include "app/sql/connection.h"
#include "app/sql/init_status.h"
#include "app/sql/statement.h"
#include "base/file_util.h"
#include "base/histogram.h"
#include "base/logging.h"
#include "base/path_service.h"
#include "base/singleton.h"
#include "base/string_util.h"
#include "chrome/common/chrome_constants.h"
#include "chrome/common/chrome_paths.h"
namespace {
const char* kHistogramNames[] = {
"Sqlite.Cookie.Error",
"Sqlite.History.Error",
"Sqlite.Thumbnail.Error",
"Sqlite.Text.Error",
"Sqlite.Web.Error"
};
// This class handles the exceptional sqlite errors that we might encounter
// if for example the db is corrupted. Right now we just generate a UMA
// histogram for release and an assert for debug builds.
//
// Why is it a template you ask? well, that is a funny story. The histograms
// need to be singletons that is why they are always static at the function
// scope, but we cannot use the Singleton class because they are not default
// constructible. The template parameter makes the compiler to create unique
// classes that don't share the same static variable.
template <size_t unique>
class BasicSqliteErrrorHandler : public sql::ErrorDelegate {
public:
virtual int OnError(int error, sql::Connection* connection,
sql::Statement* stmt) {
NOTREACHED() << "sqlite error " << error;
RecordErrorInHistogram(error);
return error;
}
private:
static void RecordErrorInHistogram(int error) {
// The histogram values from sqlite result codes go currently from 1 to
// 26 currently but 50 gives them room to grow.
UMA_HISTOGRAM_ENUMERATION(kHistogramNames[unique], error, 50);
}
};
struct DbTestInfo {
const char* test_name;
const FilePath::CharType* db_name;
};
static const DbTestInfo kTestInfo[] = {
{"Web Database", chrome::kWebDataFilename},
{"Cookies Database", chrome::kCookieFilename},
{"History Database", chrome::kHistoryFilename},
{"Archived history Database", chrome::kArchivedHistoryFilename},
{"Thumbnails Database", chrome::kThumbnailsFilename}
};
// Generic diagnostic test class for checking sqlite db integrity.
class SqliteIntegrityTest : public DiagnosticTest {
public:
explicit SqliteIntegrityTest(int index)
: DiagnosticTest(ASCIIToUTF16(kTestInfo[index].test_name)),
index_(index) {
}
virtual int GetId() { return 0; }
virtual bool ExecuteImpl(DiagnosticsModel::Observer* observer) {
FilePath path;
PathService::Get(chrome::DIR_USER_DATA, &path);
path = path.Append(FilePath::FromWStringHack(chrome::kNotSignedInProfile));
path = path.Append(kTestInfo[index_].db_name);
if (!file_util::PathExists(path)) {
RecordFailure(ASCIIToUTF16("File not found"));
return true;
}
int errors = 0;
{ // This block scopes the lifetime of the db objects.
sql::Connection db;
db.set_exclusive_locking();
if (!db.Open(path)) {
RecordFailure(ASCIIToUTF16("Cannot open db. Possibly corrupted"));
return true;
}
sql::Statement s(db.GetUniqueStatement("PRAGMA integrity_check;"));
if (!s) {
RecordFailure(ASCIIToUTF16("Statement failed"));
return false;
}
while (s.Step()) {
std::string result(s.ColumnString(0));
if ("ok" != result)
++errors;
}
}
// All done. Report to the user.
if (errors != 0) {
string16 str(ASCIIToUTF16("Database corruption detected :"));
str += IntToString16(errors) + ASCIIToUTF16(" errors");
RecordFailure(str);
return true;
}
RecordSuccess(ASCIIToUTF16("no corruption detected"));
return true;
}
private:
int index_;
DISALLOW_COPY_AND_ASSIGN(SqliteIntegrityTest);
};
} // namespace
sql::ErrorDelegate* GetErrorHandlerForCookieDb() {
return new BasicSqliteErrrorHandler<0>();
}
sql::ErrorDelegate* GetErrorHandlerForHistoryDb() {
return new BasicSqliteErrrorHandler<1>();
}
sql::ErrorDelegate* GetErrorHandlerForThumbnailDb() {
return new BasicSqliteErrrorHandler<2>();
}
sql::ErrorDelegate* GetErrorHandlerForTextDb() {
return new BasicSqliteErrrorHandler<3>();
}
sql::ErrorDelegate* GetErrorHandlerForWebDb() {
return new BasicSqliteErrrorHandler<4>();
}
DiagnosticTest* MakeSqliteWebDbTest() {
return new SqliteIntegrityTest(0);
}
DiagnosticTest* MakeSqliteCookiesDbTest() {
return new SqliteIntegrityTest(1);
}
DiagnosticTest* MakeSqliteHistoryDbTest() {
return new SqliteIntegrityTest(2);
}
DiagnosticTest* MakeSqliteArchivedHistoryDbTest() {
return new SqliteIntegrityTest(3);
}
DiagnosticTest* MakeSqliteThumbnailsDbTest() {
return new SqliteIntegrityTest(4);
}
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