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// assert_util.h
/* Copyright 2009 10gen Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include "../db/lasterror.h"
// MONGO_NORETURN undefed at end of file
#ifdef __GNUC__
# define MONGO_NORETURN __attribute__((__noreturn__))
#else
# define MONGO_NORETURN
#endif
namespace mongo {
enum CommonErrorCodes {
DatabaseDifferCaseCode = 13297 ,
StaleConfigInContextCode = 13388
};
class AssertionCount {
public:
AssertionCount();
void rollover();
void condrollover( int newValue );
int regular;
int warning;
int msg;
int user;
int rollovers;
};
extern AssertionCount assertionCount;
struct ExceptionInfo {
ExceptionInfo() : msg(""),code(-1) {}
ExceptionInfo( const char * m , int c )
: msg( m ) , code( c ) {
}
ExceptionInfo( const string& m , int c )
: msg( m ) , code( c ) {
}
void append( BSONObjBuilder& b , const char * m = "$err" , const char * c = "code" ) const ;
string toString() const { stringstream ss; ss << "exception: " << code << " " << msg; return ss.str(); }
bool empty() const { return msg.empty(); }
void reset(){ msg = ""; code=-1; }
string msg;
int code;
};
/** helper class that builds error strings. lighter weight than a StringBuilder, albeit less flexible.
NOINLINE_DECL used in the constructor implementations as we are assuming this is a cold code path when used.
example:
throw UserException(123, ErrorMsg("blah", num_val));
*/
class ErrorMsg {
public:
ErrorMsg(const char *msg, char ch);
ErrorMsg(const char *msg, unsigned val);
operator string() const { return buf; }
private:
char buf[256];
};
class DBException : public std::exception {
public:
DBException( const ExceptionInfo& ei ) : _ei(ei) {}
DBException( const char * msg , int code ) : _ei(msg,code) {}
DBException( const string& msg , int code ) : _ei(msg,code) {}
virtual ~DBException() throw() { }
virtual const char* what() const throw() { return _ei.msg.c_str(); }
virtual int getCode() const { return _ei.code; }
virtual void appendPrefix( stringstream& ss ) const { }
virtual string toString() const {
stringstream ss; ss << getCode() << " " << what(); return ss.str();
return ss.str();
}
const ExceptionInfo& getInfo() const { return _ei; }
protected:
ExceptionInfo _ei;
};
class AssertionException : public DBException {
public:
AssertionException( const ExceptionInfo& ei ) : DBException(ei) {}
AssertionException( const char * msg , int code ) : DBException(msg,code) {}
AssertionException( const string& msg , int code ) : DBException(msg,code) {}
virtual ~AssertionException() throw() { }
virtual bool severe() { return true; }
virtual bool isUserAssertion() { return false; }
/* true if an interrupted exception - see KillCurrentOp */
bool interrupted() {
return _ei.code == 11600 || _ei.code == 11601;
}
};
/* UserExceptions are valid errors that a user can cause, like out of disk space or duplicate key */
class UserException : public AssertionException {
public:
UserException(int c , const string& m) : AssertionException( m , c ) {}
virtual bool severe() { return false; }
virtual bool isUserAssertion() { return true; }
virtual void appendPrefix( stringstream& ss ) const { ss << "userassert:"; }
};
class MsgAssertionException : public AssertionException {
public:
MsgAssertionException( const ExceptionInfo& ei ) : AssertionException( ei ) {}
MsgAssertionException(int c, const string& m) : AssertionException( m , c ) {}
virtual bool severe() { return false; }
virtual void appendPrefix( stringstream& ss ) const { ss << "massert:"; }
};
void asserted(const char *msg, const char *file, unsigned line) MONGO_NORETURN;
void wasserted(const char *msg, const char *file, unsigned line);
void verifyFailed( int msgid );
/** a "user assertion". throws UserAssertion. logs. typically used for errors that a user
could cause, such as duplicate key, disk full, etc.
*/
void uasserted(int msgid, const char *msg) MONGO_NORETURN;
inline void uasserted(int msgid , string msg) { uasserted(msgid, msg.c_str()); }
/** reported via lasterror, but don't throw exception */
void uassert_nothrow(const char *msg);
/** msgassert and massert are for errors that are internal but have a well defined error text string.
a stack trace is logged.
*/
void msgassertedNoTrace(int msgid, const char *msg) MONGO_NORETURN;
inline void msgassertedNoTrace(int msgid, const string& msg) { msgassertedNoTrace( msgid , msg.c_str() ); }
void msgasserted(int msgid, const char *msg) MONGO_NORETURN;
inline void msgasserted(int msgid, string msg) { msgasserted(msgid, msg.c_str()); }
/* convert various types of exceptions to strings */
inline string causedBy( const char* e ){ return (string)" :: caused by :: " + e; }
inline string causedBy( const DBException& e ){ return causedBy( e.toString().c_str() ); }
inline string causedBy( const std::exception& e ){ return causedBy( e.what() ); }
inline string causedBy( const string& e ){ return causedBy( e.c_str() ); }
/** in the mongodb source, use verify() instead of assert(). verify is always evaluated even in release builds. */
inline void verify( int msgid , bool testOK ) { if ( ! testOK ) verifyFailed( msgid ); }
#define MONGO_assert(_Expression) (void)( MONGO_likely(!!(_Expression)) || (mongo::asserted(#_Expression, __FILE__, __LINE__), 0) )
/* "user assert". if asserts, user did something wrong, not our code */
#define MONGO_uassert(msgid, msg, expr) (void)( MONGO_likely(!!(expr)) || (mongo::uasserted(msgid, msg), 0) )
/* warning only - keeps going */
#define MONGO_wassert(_Expression) (void)( MONGO_likely(!!(_Expression)) || (mongo::wasserted(#_Expression, __FILE__, __LINE__), 0) )
/* display a message, no context, and throw assertionexception
easy way to throw an exception and log something without our stack trace
display happening.
*/
#define MONGO_massert(msgid, msg, expr) (void)( MONGO_likely(!!(expr)) || (mongo::msgasserted(msgid, msg), 0) )
/* dassert is 'debug assert' -- might want to turn off for production as these
could be slow.
*/
#if defined(_DEBUG)
# define MONGO_dassert assert
#else
# define MONGO_dassert(x)
#endif
// some special ids that we want to duplicate
// > 10000 asserts
// < 10000 UserException
enum { ASSERT_ID_DUPKEY = 11000 };
/* throws a uassertion with an appropriate msg */
void streamNotGood( int code , string msg , std::ios& myios ) MONGO_NORETURN;
inline void assertStreamGood(unsigned msgid, string msg, std::ios& myios) {
if( !myios.good() ) streamNotGood(msgid, msg, myios);
}
string demangleName( const type_info& typeinfo );
} // namespace mongo
#define BOOST_CHECK_EXCEPTION MONGO_BOOST_CHECK_EXCEPTION
#define MONGO_BOOST_CHECK_EXCEPTION( expression ) \
try { \
expression; \
} catch ( const std::exception &e ) { \
stringstream ss; \
ss << "caught boost exception: " << e.what() << ' ' << __FILE__ << ' ' << __LINE__; \
msgasserted( 13294 , ss.str() ); \
} catch ( ... ) { \
massert( 10437 , "unknown boost failed" , false ); \
}
#define MONGO_BOOST_CHECK_EXCEPTION_WITH_MSG( expression, msg ) \
try { \
expression; \
} catch ( const std::exception &e ) { \
stringstream ss; \
ss << msg << " caught boost exception: " << e.what(); \
msgasserted( 14043 , ss.str() ); \
} catch ( ... ) { \
msgasserted( 14044 , string("unknown boost failed ") + msg ); \
}
#define DESTRUCTOR_GUARD MONGO_DESTRUCTOR_GUARD
#define MONGO_DESTRUCTOR_GUARD( expression ) \
try { \
expression; \
} catch ( const std::exception &e ) { \
problem() << "caught exception (" << e.what() << ") in destructor (" << __FUNCTION__ << ")" << endl; \
} catch ( ... ) { \
problem() << "caught unknown exception in destructor (" << __FUNCTION__ << ")" << endl; \
}
#undef MONGO_NORETURN
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