Binary compatibility report for the mongoDB library between 2.5.1 and 2.5.2 versions on x86

Test Info

Library Name	mongoDB
Version #1	2.5.1
Version #2	2.5.2
CPU Type	x86
GCC Version	4.6.1

Test Results

Total Header Files	1
Total Shared Libraries	76
Total Symbols / Types	839 / 614
Verdict	Incompatible (6.7%)

Problem Summary

	Severity	Count
Added Symbols	-	11
Removed Symbols	High	2
Problems with Data Types	High	5
	Medium	1
	Low	3
Problems with Symbols	High	0
	Medium	0
	Low	1
Problems with Constants	Low	0
Other Changes in Data Types	-	2

Added Symbols (11)

dbclient_rs.h, libmongocommon.so
namespace mongo
ReplicaSetMonitor::cleanup ( ) [static]

message_port.h, libmongocommon.so
namespace mongo
MessagingPort::localAddr ( ) const
MessagingPort::remoteAddr ( ) const

time_support.h, libfoundation.so
namespace mongo
Date_t::toString ( ) const
Date_t::toTimeT ( ) const
Date_t::toTm ( tm* buf )
dateToCtimeString ( Date_t date )
dateToISOStringLocal ( Date_t date )
dateToISOStringUTC ( Date_t date )
time_t_to_String ( time_t t )
time_t_to_String_short ( time_t t )

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Removed Symbols (2)

bsonobj.h, libbson.so
namespace mongo
BSONObj::okForStorage ( ) const

time_support.h, libfoundation.so
namespace mongo
curTimeString ( char* timeStr )

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Problems with Data Types, High Severity (5)

	Change	Effect
1	Field lastReconnectTry has been removed from the middle position of this structural type.	1) Previous accesses of applications to the removed field will be incorrect. 2) Layout of structure fields has been changed and therefore fields at higher positions of the structure definition may be incorrectly accessed by applications.
2	Size of this class has been changed from 120 bytes to 136 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	Pure virtual method AbstractMessagingPort::localAddr ( ) const has been added to this class.	1) Applications will not provide the implementation for this pure virtual method and therefore cause a crash in the library trying to call this method. 2) 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.
2	Pure virtual method AbstractMessagingPort::remoteAddr ( ) const has been added to this class.	1) Applications will not provide the implementation for this pure virtual method and therefore cause a crash in the library trying to call this method. 2) 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) - 8 entries	Virtual Table (New) - 10 entries
0	(int (*)(...))0	(int (*)(...))0
4	(int (*)(...))(& typeinfo)	(int (*)(...))(& typeinfo)
8	~AbstractMessagingPort	~AbstractMessagingPort
12	~AbstractMessagingPort	~AbstractMessagingPort
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
36		__cxa_pure_virtual

	Change	Effect
1	Size of this class has been increased from 176 bytes to 308 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 neighboring objects on the stack or heap. 2) The memory layout and size of subclasses will be changed.

dbclientinterface.h
namespace mongo
[+] class DBClientConnection (2)

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

sock.h
namespace mongo
[+] class Socket (1)

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Problems with Data Types, Medium Severity (1)

	Change	Effect
1	Field autoReconnectBackoff 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.

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

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Problems with Data Types, Low Severity (3)

	Change	Effect
1	Value of member MaxError has been changed from 43 to 45.	Applications may execute a wrong branch of code in the library and therefore change the behavior.

	Change	Effect
1	Field _local 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	Base class boost::noncopyable_::noncopyable has been removed.	Possible incorrect access of applications to the memory occupied by the base classes.

error_codes.h
namespace mongo
[+] enum ErrorCodes::Error (1)

sock.h
namespace mongo
[+] class Socket (2)

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Problems with Symbols, Low Severity (1)

	Change	Effect
1	Type of return value has been changed from void to bool (1 byte).	Replacement of return type may indicate a change in its semantic meaning.

cmdline.h, libdbcmdline.so
namespace mongo
[+] CmdLine::parseConfigFile ( std::istream& f, std::stringstream& ss ) [static] (1)

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Other Changes in Data Types (2)

	Change	Effect
1	The member CursorNotFound with value 43 has been added.	No effect.
2	The member KeyNotFound with value 44 has been added.	No effect.

error_codes.h
namespace mongo
[+] enum ErrorCodes::Error (2)

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Header Files (1)

dbclient.h

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Shared Libraries (76)

liballtools.so
libauthcore.so
libauthmocks.so
libauthmongod.so
libauthmongos.so
libauthservercommon.so
libbase.so
libboost_filesystem.so
libboost_program_options.so
libboost_system.so
libboost_thread.so
libbson.so
libbson_template_evaluator.so
libclientandshell.so
libcoding.so
libcommon.so
libcoredb.so
libcoreserver.so
libcoreshard.so
libdbcmdline.so
libdefaultversion.so
libexec.so
libexpressions.so
libexpressions_geo.so
libexpressions_where.so
libfail_point.so
libfoundation.so
libftsmongod.so
libftsmongos.so
libgeometry.so
libgeoparser.so
libgeoquery.so
libgridfs.so
libindex_set.so
liblogger.so
libmath.so
libmd5.so
libmetadata.so
libmongocommon.so
libmongodandmongos.so
libmongodwebserver.so
libmongohasher.so
libmongoscore.so
libmurmurhash3.so
libntservice.so
libpath.so
libpcrecpp.so
libplatform.so
libprocessinfo.so
librange_deleter.so
libs2.so
libscripting.so
libserver_common.so
libserver_parameters.so
libserverauth.so
libserveronly.so
libshim_allocator.so
libshim_boost.so
libshim_pcrecpp.so
libshim_snappy.so
libshim_stemmer.so
libshim_v8.so
libsnappy.so
libstacktrace.so
libstemmer.so
libstrings.so
libstringutils.so
libsynchronization.so
libthread_name.so
libupdate.so
libupdate_common.so
libupdate_driver.so
libupgrade.so
libv8.so
libworking_set.so
libwritebatch.so

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