737a20b8fa
In general, the current distributed lock is susceptible to time skew in config servers and mongos clients. This update uses an algorithm that checks for time skew, as well as providing some more robust tests to make sure a distributed lock cannot be forced prematurely. Some documentation on the website, currently hidden from non-10gen, gives more info.
230 lines
8.1 KiB
C++
230 lines
8.1 KiB
C++
// assert_util.h
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/* Copyright 2009 10gen Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include "../db/lasterror.h"
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namespace mongo {
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enum CommonErrorCodes {
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DatabaseDifferCaseCode = 13297 ,
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StaleConfigInContextCode = 13388
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};
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class AssertionCount {
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public:
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AssertionCount();
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void rollover();
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void condrollover( int newValue );
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int regular;
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int warning;
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int msg;
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int user;
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int rollovers;
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};
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extern AssertionCount assertionCount;
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struct ExceptionInfo {
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ExceptionInfo() : msg(""),code(-1) {}
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ExceptionInfo( const char * m , int c )
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: msg( m ) , code( c ) {
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}
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ExceptionInfo( const string& m , int c )
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: msg( m ) , code( c ) {
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}
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void append( BSONObjBuilder& b , const char * m = "$err" , const char * c = "code" ) const ;
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string toString() const { stringstream ss; ss << "exception: " << code << " " << msg; return ss.str(); }
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bool empty() const { return msg.empty(); }
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string msg;
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int code;
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};
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class DBException : public std::exception {
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public:
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DBException( const ExceptionInfo& ei ) : _ei(ei) {}
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DBException( const char * msg , int code ) : _ei(msg,code) {}
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DBException( const string& msg , int code ) : _ei(msg,code) {}
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virtual ~DBException() throw() { }
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virtual const char* what() const throw() { return _ei.msg.c_str(); }
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virtual int getCode() const { return _ei.code; }
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virtual void appendPrefix( stringstream& ss ) const { }
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virtual string toString() const {
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stringstream ss; ss << getCode() << " " << what(); return ss.str();
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return ss.str();
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}
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const ExceptionInfo& getInfo() const { return _ei; }
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protected:
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ExceptionInfo _ei;
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};
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class AssertionException : public DBException {
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public:
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AssertionException( const ExceptionInfo& ei ) : DBException(ei) {}
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AssertionException( const char * msg , int code ) : DBException(msg,code) {}
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AssertionException( const string& msg , int code ) : DBException(msg,code) {}
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virtual ~AssertionException() throw() { }
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virtual bool severe() { return true; }
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virtual bool isUserAssertion() { return false; }
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/* true if an interrupted exception - see KillCurrentOp */
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bool interrupted() {
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return _ei.code == 11600 || _ei.code == 11601;
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}
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};
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/* UserExceptions are valid errors that a user can cause, like out of disk space or duplicate key */
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class UserException : public AssertionException {
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public:
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UserException(int c , const string& m) : AssertionException( m , c ) {}
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virtual bool severe() { return false; }
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virtual bool isUserAssertion() { return true; }
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virtual void appendPrefix( stringstream& ss ) const { ss << "userassert:"; }
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};
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class MsgAssertionException : public AssertionException {
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public:
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MsgAssertionException( const ExceptionInfo& ei ) : AssertionException( ei ) {}
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MsgAssertionException(int c, const string& m) : AssertionException( m , c ) {}
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virtual bool severe() { return false; }
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virtual void appendPrefix( stringstream& ss ) const { ss << "massert:"; }
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};
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void asserted(const char *msg, const char *file, unsigned line);
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void wasserted(const char *msg, const char *file, unsigned line);
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/** a "user assertion". throws UserAssertion. logs. typically used for errors that a user
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could cause, such as dupliate key, disk full, etc.
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*/
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void uasserted(int msgid, const char *msg);
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inline void uasserted(int msgid , string msg) { uasserted(msgid, msg.c_str()); }
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/** reported via lasterror, but don't throw exception */
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void uassert_nothrow(const char *msg);
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/** msgassert and massert are for errors that are internal but have a well defined error text string.
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a stack trace is logged.
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*/
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void msgassertedNoTrace(int msgid, const char *msg);
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inline void msgassertedNoTrace(int msgid, const string& msg) { msgassertedNoTrace( msgid , msg.c_str() ); }
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void msgasserted(int msgid, const char *msg);
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inline void msgasserted(int msgid, string msg) { msgasserted(msgid, msg.c_str()); }
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#ifdef assert
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#undef assert
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#endif
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#define MONGO_assert(_Expression) (void)( (!!(_Expression)) || (mongo::asserted(#_Expression, __FILE__, __LINE__), 0) )
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#define assert MONGO_assert
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/* "user assert". if asserts, user did something wrong, not our code */
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#define MONGO_uassert(msgid, msg, expr) (void)( (!!(expr)) || (mongo::uasserted(msgid, msg), 0) )
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#define uassert MONGO_uassert
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/* user assert with helpful message handling */
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#define MONGO_uassert_msg(msgid, msg, expr) { if(!(expr)){ stringstream ss; ss << msg; mongo::uasserted(msgid, ss.str()); } }
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#define uassert_msg MONGO_uassert_msg
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/* warning only - keeps going */
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#define MONGO_wassert(_Expression) (void)( (!!(_Expression)) || (mongo::wasserted(#_Expression, __FILE__, __LINE__), 0) )
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#define wassert MONGO_wassert
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/* display a message, no context, and throw assertionexception
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easy way to throw an exception and log something without our stack trace
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display happening.
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*/
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#define MONGO_massert(msgid, msg, expr) (void)( (!!(expr)) || (mongo::msgasserted(msgid, msg), 0) )
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#define massert MONGO_massert
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/* dassert is 'debug assert' -- might want to turn off for production as these
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could be slow.
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*/
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#if defined(_DEBUG)
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# define MONGO_dassert assert
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#else
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# define MONGO_dassert(x)
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#endif
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#define dassert MONGO_dassert
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// some special ids that we want to duplicate
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// > 10000 asserts
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// < 10000 UserException
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enum { ASSERT_ID_DUPKEY = 11000 };
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/* throws a uassertion with an appropriate msg */
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void streamNotGood( int code , string msg , std::ios& myios );
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inline void assertStreamGood(unsigned msgid, string msg, std::ios& myios) {
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if( !myios.good() ) streamNotGood(msgid, msg, myios);
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}
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string demangleName( const type_info& typeinfo );
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} // namespace mongo
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#define BOOST_CHECK_EXCEPTION MONGO_BOOST_CHECK_EXCEPTION
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#define MONGO_BOOST_CHECK_EXCEPTION( expression ) \
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try { \
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expression; \
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} catch ( const std::exception &e ) { \
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stringstream ss; \
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ss << "caught boost exception: " << e.what(); \
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msgasserted( 13294 , ss.str() ); \
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} catch ( ... ) { \
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massert( 10437 , "unknown boost failed" , false ); \
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}
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#define DESTRUCTOR_GUARD MONGO_DESTRUCTOR_GUARD
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#define MONGO_DESTRUCTOR_GUARD( expression ) \
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try { \
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expression; \
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} catch ( const std::exception &e ) { \
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problem() << "caught exception (" << e.what() << ") in destructor (" << __FUNCTION__ << ")" << endl; \
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} catch ( ... ) { \
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problem() << "caught unknown exception in destructor (" << __FUNCTION__ << ")" << endl; \
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}
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/* Some useful utility defines, allowing more concise exception handling */
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#define MONGO_throw_exception(code, type, msg) { stringstream ss; ss << msg; throw type(ss.str().c_str(), code); }
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#define m_throw_exception MONGO_throw_exception
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#define MONGO_caused_by(e) ( string("\n caused by : ") + e.toString() )
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#define m_caused_by MONGO_caused_by
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#define MONGO_error_message(e) ( string("\n error message : ") + e )
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#define m_error_message MONGO_error_message
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#define MONGO_chain_exception(code, e, type, msg) { stringstream ss; ss << msg; ss << MONGO_caused_by(e); throw type(ss.str().c_str(), code); }
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#define m_chain_exception MONGO_chain_exception
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