Binary compatibility report for the mongoDB library between 2.1.2 and 2.2.0 versions on x86

Test Info

Library Name	mongoDB
Version #1	2.1.2
Version #2	2.2.0
CPU Type	x86
GCC Version	4.6.1

Test Results

Total Header Files	1
Total Shared Libraries	1
Total Symbols / Types	701 / 475
Verdict	Incompatible (14.3%)

Problem Summary

	Severity	Count
Added Symbols	-	17
Removed Symbols	High	5
Problems with Data Types	High	4
	Medium	6
	Low	8
Problems with Symbols	High	1
	Medium	1
	Low	0
Problems with Constants	Low	0

Added Symbols (17)

authentication_table.h, libmongoclient.so
namespace mongo
AuthenticationTable::fieldName [data]

bsontypes.h, libmongoclient.so
namespace mongo
typeName ( BSONType type )

dbclient_rs.h, libmongoclient.so
namespace mongo
DBClientReplicaSet::logout ( std::string const& dbname, BSONObj& info )
ReplicaSetMonitor::isHostCompatible ( HostAndPort const& host, ReadPreference readPreference, TagSet const* tagSet ) const
ReplicaSetMonitor::Node::isCompatible ( ReadPreference readPreference, TagSet const* tag ) const
ReplicaSetMonitor::selectAndCheckNode ( ReadPreference preference, TagSet* tags )
ReplicaSetMonitor::selectNode ( std::vector<ReplicaSetMonitor::Node>const& nodes, ReadPreference preference, TagSet* tags, int localThresholdMillis, HostAndPort* lastHost ) [static]
TagSet::getCurrentTag ( ) const
TagSet::getIterator ( ) const
TagSet::isExhausted ( ) const
TagSet::next ( )
TagSet::TagSet [in-charge] ( )
TagSet::TagSet [in-charge] ( BSONArray const& tags )
TagSet::TagSet [not-in-charge] ( )
TagSet::TagSet [not-in-charge] ( BSONArray const& tags )

dbclientinterface.h, libmongoclient.so
namespace mongo
DBClientWithCommands::logout ( std::string const& dbname, BSONObj& info )

time_support.h, libmongoclient.so
namespace mongo
Backoff::nextSleepMillis ( )

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Removed Symbols (5)

dbclient_rs.h, libmongoclient.so
namespace mongo
ReplicaSetMonitor::selectNode ( std::vector<ReplicaSetMonitor::Node>const& nodes, ReadPreference readPreference, BSONObj const& readPreferenceTag, int localThresholdMillis, int primaryNodeIndex, int& nextNodeIndex ) [static]

hostandport.h, libmongoclient.so
namespace mongo
dynHostMyName ( )
dynHostResolve ( std::string& name, int& port )

message_port.h, libmongoclient.so
namespace mongo
MessagingPort::assertStillConnected ( )

sock.h, libmongoclient.so
namespace mongo
Socket::stillConnected ( )

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Problems with Data Types, High Severity (4)

	Change	Effect
1	Size of this class has been increased from 144 bytes to 152 bytes.	1) An object of this class can be allocated by the applications and old size will be hardcoded at the compile time. Call of any exported constructor will break the memory of neighbouring objects on the stack or heap. 2) The memory layout and size of subclasses will be changed.

	Change	Effect
1	Size of this class has been changed from 40 bytes to 36 bytes.	1) The class has only inline or auto-generated constructors which will be copied to applications at compile time and will allocate an older memory layout. Call of any exported method of this class may access a memory outside the allocated objects or inside the older memory structure and result in crash or incorrect behavior of applications. 2) The memory layout and size of subclasses will be changed.

	Change	Effect
1	Size of this class has been changed from 144 bytes to 140 bytes.	1) The class has only inline or auto-generated constructors which will be copied to applications at compile time and will allocate an older memory layout. Call of any exported method of this class may access a memory outside the allocated objects or inside the older memory structure and result in crash or incorrect behavior of applications. 2) The memory layout and size of subclasses will be changed.

	Change	Effect
1	Virtual method DBClientWithCommands::logout ( std::string const&, BSONObj& ) has been added to this class.	The layout of v-table has been changed. Call of any virtual method at higher position in this class or its subclasses may result in crash or incorrect behavior of applications.

Offset	Virtual Table (Old) - 32 entries	Virtual Table (New) - 33 entries
0	(int (*)(...))0	(int (*)(...))0
4	(int (*)(...))(& typeinfo)	(int (*)(...))(& typeinfo)
8	__cxa_pure_virtual	__cxa_pure_virtual
12	__cxa_pure_virtual	__cxa_pure_virtual
16	__cxa_pure_virtual	__cxa_pure_virtual
20	__cxa_pure_virtual	__cxa_pure_virtual
24	__cxa_pure_virtual	__cxa_pure_virtual
28	__cxa_pure_virtual	__cxa_pure_virtual
32	__cxa_pure_virtual	__cxa_pure_virtual
36	~DBClientWithCommands	~DBClientWithCommands
40	~DBClientWithCommands	~DBClientWithCommands
44	DBClientInterface::findOne	DBClientInterface::findOne
48	__cxa_pure_virtual	__cxa_pure_virtual
52	__cxa_pure_virtual	__cxa_pure_virtual
56	DBClientWithCommands::runCommand	DBClientWithCommands::runCommand
60	DBClientWithCommands::auth	DBClientWithCommands::auth
64	DBClientWithCommands::count	DBClientWithCommands::logout
68	DBClientWithCommands::isMaster	DBClientWithCommands::count
72	DBClientWithCommands::getLastErrorDetailed	DBClientWithCommands::isMaster
76	DBClientWithCommands::dropCollection	DBClientWithCommands::getLastErrorDetailed
80	DBClientWithCommands::setAuthenticationTable	DBClientWithCommands::dropCollection
84	DBClientWithCommands::clearAuthenticationTable	DBClientWithCommands::setAuthenticationTable
88	DBClientWithCommands::ensureIndex	DBClientWithCommands::clearAuthenticationTable
92	DBClientWithCommands::resetIndexCache	DBClientWithCommands::ensureIndex
96	DBClientWithCommands::getIndexes	DBClientWithCommands::resetIndexCache
100	DBClientWithCommands::dropIndex	DBClientWithCommands::getIndexes
104	DBClientWithCommands::dropIndex	DBClientWithCommands::dropIndex
108	DBClientWithCommands::dropIndexes	DBClientWithCommands::dropIndex
112	DBClientWithCommands::reIndex	DBClientWithCommands::dropIndexes
116	DBClientWithCommands::dropDatabase	DBClientWithCommands::reIndex
120	__cxa_pure_virtual	DBClientWithCommands::dropDatabase
124	DBClientWithCommands::_lookupAvailableOptions	__cxa_pure_virtual
128		DBClientWithCommands::_lookupAvailableOptions

dbclient_rs.h
namespace mongo
[+] class DBClientReplicaSet (1)
[+] class ReplicaSetMonitor::Node (1)

dbclientinterface.h
namespace mongo
[+] class DBClientConnection (1)
[+] class DBClientWithCommands (1)

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Problems with Symbols, High Severity (1)

	Change	Effect
1	Parameters list has been changed.	The name of the appropriate symbol for this function on binary level has been changed from _ZN5mongo17ReplicaSetMonitor10selectNodeERKSt6vectorINS0_4NodeESaIS2_EENS_14ReadPreferenceERKNS_7BSONObjEiiRi to _ZN5mongo17ReplicaSetMonitor10selectNodeERKSt6vectorINS0_4NodeESaIS2_EENS_14ReadPreferenceEPNS_6TagSetEiPNS_11HostAndPortE. This may cause "undefined reference" linker error in old client applications.

dbclient_rs.h, libmongoclient.so
namespace mongo
[+] ReplicaSetMonitor::selectNode ( std::vector<ReplicaSetMonitor::Node>const& nodes, ReadPreference readPreference, BSONObj const& readPreferenceTag, int localThresholdMillis, int primaryNodeIndex, int& nextNodeIndex ) [static] (1)

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Problems with Data Types, Medium Severity (6)

	Change	Effect
1	Field rsIndexPrefetch has been added at the middle position of this structural type.	1) Size of the inclusive type has been changed. 2) Layout of structure fields has been changed and therefore fields at higher positions of the structure definition may be incorrectly accessed by applications.

	Change	Effect
1	Size of field _masterHost has been changed from 12 bytes to 8 bytes.	1) Size of the inclusive type has been changed. 2) Previous accesses of applications and library functions to the fields at higher positions of the structure definition may be broken.
2	Type of field _auths has been changed from std::list<DBClientReplicaSet::AuthInfo> (8 bytes) to std::map<std::string,DBClientReplicaSet::AuthInfo> (24 bytes).	1) Size of the inclusive type has been changed. 2) Previous accesses of applications and library functions to the fields at higher positions of the structure definition may be broken.

	Change	Effect
1	Size of field addr has been changed from 12 bytes to 8 bytes.	1) Size of the inclusive type has been changed. 2) Previous accesses of applications and library functions to this field and fields at higher positions of the structure definition may be broken.

	Change	Effect
1	Size of field _server has been changed from 12 bytes to 8 bytes.	1) Size of the inclusive type has been changed. 2) Previous accesses of applications and library functions to this field and fields at higher positions of the structure definition may be broken.

	Change	Effect
1	The layout of v-table has been changed for unknown reason.	Call of any method in this class may result in crash or incorrect behavior of applications.

Offset	Virtual Table (Old) - 9 entries	Virtual Table (New) - 8 entries
0	(int (*)(...))0	(int (*)(...))0
4	(int (*)(...))(& typeinfo)	(int (*)(...))(& typeinfo)
8	~MessagingPort	~MessagingPort
12	~MessagingPort	~MessagingPort
16	MessagingPort::reply	MessagingPort::reply
20	MessagingPort::reply	MessagingPort::reply
24	MessagingPort::remote	MessagingPort::remote
28	MessagingPort::remotePort	MessagingPort::remotePort
32	MessagingPort::assertStillConnected

cmdline.h
namespace mongo
[+] class CmdLine (1)

dbclient_rs.h
namespace mongo
[+] class DBClientReplicaSet (2)
[+] class ReplicaSetMonitor::Node (1)

dbclientinterface.h
namespace mongo
[+] class DBClientConnection (1)

message_port.h
namespace mongo
[+] class MessagingPort (1)

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Problems with Symbols, Medium Severity (1)

	Change	Effect
1	Size of this global data has been changed from 120 bytes to 124 bytes.	Applications will obtain a different value and execution may change.

cmdline.h, libmongoclient.so
namespace mongo
[+] cmdLine [data] (1)

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Problems with Data Types, Low Severity (8)

	Change	Effect
1	Size of this type has been changed from 120 bytes to 124 bytes.	The fields or parameters of such data type may be incorrectly initialized or accessed by old client applications.

	Change	Effect
1	Field _lastReadPrefHost has been added to this type.	Size of the inclusive type has been changed. NOTE: this field should be accessed only from the new library functions, otherwise it may result in crash or incorrect behavior of applications.
2	Size of this type has been changed from 48 bytes to 56 bytes.	The fields or parameters of such data type may be incorrectly initialized or accessed by old client applications.

	Change	Effect
1	Size of this type has been changed from 12 bytes to 8 bytes.	The fields or parameters of such data type may be incorrectly initialized or accessed by old client applications.
2	Field _dynName has been removed from this type.	Size of the inclusive type has been changed.

	Change	Effect
1	Size of this type has been changed from 40 bytes to 36 bytes.	The fields or parameters of such data type may be incorrectly initialized or accessed by old client applications.
2	Size of field _remoteParsed has been changed from 12 bytes to 8 bytes.	Size of the inclusive type has been changed.

	Change	Effect
1	Field _size became mutable.	The value of this field can begin to change in ways outside the control of old client applications.

cmdline.h
namespace mongo
[+] class CmdLine (1)

dbclient_rs.h
namespace mongo
[+] class ReplicaSetMonitor (2)

hostandport.h
namespace mongo
[+] class HostAndPort (2)

message_port.h
namespace mongo
[+] class MessagingPort (2)

stringdata.h
namespace mongo
[+] class StringData (1)

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Header Files (1)

dbclient.h

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Shared Libraries (1)

libmongoclient.so

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