Binary compatibility report for the mongoDB library between 1.3.1 and 1.3.2 versions on x86

Test Info

Library Name	mongoDB
Version #1	1.3.1
Version #2	1.3.2
CPU Architecture	x86
GCC Version	4.5

Test Results

Total Header Files	1
Total Shared Libraries	1
Total Symbols / Types	345 / 241
Verdict	Incompatible (2.90%)

Problem Summary

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

Added Symbols (3)

concurrency.h, libmongoclient.so
namespace mongo
dbMutex [data]

log.h, libmongoclient.so
namespace mongo
errnostring ( char const* prefix )

message.h, libmongoclient.so
namespace mongo
MessagingPort::reply ( Message& received, Message& response, AtomicUInt responseTo )

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Removed Symbols (1)

message.h, libmongoclient.so
namespace mongo
MessagingPort::reply ( Message& received, Message& response, WrappingInt responseTo )

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Problems with Data Types, High Severity (1)

	Change	Effect
1	Size of this class has been changed from 24 bytes to 28 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.

lasterror.h
namespace mongo
[+] class LastError (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 _ZN5mongo13MessagingPort5replyERNS_7MessageES2_NS_11WrappingIntE to _ZN5mongo13MessagingPort5replyERNS_7MessageES2_NS_10AtomicUIntE. This may cause "undefined reference" linker error in old client applications.

message.h, libmongoclient.so
namespace mongo
[+] MessagingPort::reply ( Message& received, Message& response, WrappingInt responseTo ) (1)

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Problems with Data Types, Medium Severity (2)

	Change	Effect
1	Type of field nObjects has been changed from int (4 bytes) to long long (8 bytes).	1) Size of the inclusive type has 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	Pure virtual method AbstractMessagingPort::reply ( Message& received, Message& response, AtomicUInt responseTo ) has been added to this class instead of AbstractMessagingPort::reply ( Message& received, Message& response, WrappingInt responseTo ).	Applications will provide an older method to the library instead of expected newely added virtual method. This may result in crash or incorrect behavior of applications.

Offset	Virtual Table (Old) - 7 entries	Virtual Table (New) - 7 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

lasterror.h
namespace mongo
[+] class LastError (1)

message.h
namespace mongo
[+] class AbstractMessagingPort (1)

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Problems with Data Types, Low Severity (1)

message.h
namespace mongo
[+] typedef MSGID (1)

	Change	Effect
1	Base type has been changed from WrappingInt to AtomicUInt.	Possible incorrect initialization of parameters by applications.

[+] affected symbols (14)

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Header Files (1)

dbclient.h

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Shared Libraries (1)

libmongoclient.so

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