Binary compatibility report for the libmemcached library between 0.50 and 0.52 versions on x86

Test Info

Library Name	libmemcached
Version #1	0.50
Version #2	0.52
CPU Type	x86
GCC Version	4.6.1

Test Results

Total Header Files	58
Total Shared Libraries	4
Total Symbols / Types	168 / 191
Verdict	Incompatible (70.2%)

Problem Summary

	Severity	Count
Added Symbols	-	19
Removed Symbols	High	0
Problems with Data Types	High	4
	Medium	8
	Low	8
Problems with Symbols	High	0
	Medium	0
	Low	5
Problems with Constants	Low	0
Other Changes in Data Types	-	4
Other Changes in Constants	-	4

Added Symbols (19)

algorithm.h, libmemcached.so.8.0.0
hashkit_crc32 ( char const* key, size_t key_length, void* context )
hashkit_fnv1_32 ( char const* key, size_t key_length, void* context )
hashkit_fnv1_64 ( char const* key, size_t key_length, void* context )
hashkit_fnv1a_32 ( char const* key, size_t key_length, void* context )
hashkit_fnv1a_64 ( char const* key, size_t key_length, void* context )
hashkit_jenkins ( char const* key, size_t key_length, void* context )
hashkit_md5 ( char const* key, size_t key_length, void* context )
hashkit_one_at_a_time ( char const* key, size_t key_length, void* context )

cache.h, libmemcachedprotocol.so.0.0.0
cache_alloc ( struct cache_t* handle )
cache_create ( char const* name, size_t bufsize, size_t align, int(*constructor)(void*, void*, int), void(*destructor)(void*, void*) )
cache_destroy ( struct cache_t* handle )
cache_error [data]
cache_free ( struct cache_t* handle, void* ptr )

error.h, libmemcached.so.8.0.0
memcached_server_error_return ( memcached_server_instance_st ptr )

namespace.h, libmemcached.so.8.0.0
memcached_get_namespace ( memcached_st* self )

pid.h, libmemcachedutil.so.2.0.0
libmemcached_util_getpid ( char const* hostname, in_port_t port, enum memcached_return_t* ret )
libmemcached_util_getpid2 ( char const* hostname, in_port_t port, char const* username, char const* password, enum memcached_return_t* ret )

ping.h, libmemcachedutil.so.2.0.0
libmemcached_util_ping2 ( char const* hostname, in_port_t port, char const* username, char const* password, enum memcached_return_t* ret )

server.h, libmemcached.so.8.0.0
memcached_server_type ( memcached_server_instance_st const ptr )

to the top

Problems with Data Types, High Severity (4)

	Change	Effect
1	Field prefix_key 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.

	Change	Effect
1	Size of this type has been changed from 17520 bytes to 17528 bytes.	Layout of parameter's stack of several functions has been changed and therefore parameters at higher positions in the stack may be incorrectly initialized by applications.
2	Field cached_errno 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.
3	Field cached_server_error 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.

memcached.h
[+] struct memcached_st (1)

server.h
[+] struct memcached_server_st (3)

to the top

Problems with Data Types, Medium Severity (8)

	Change	Effect
1	Value of member MEMCACHED_CONNECTION_TCP has been changed from 1 to 0.	Applications may execute a wrong branch of code in the library and therefore change the behavior.
2	Value of member MEMCACHED_CONNECTION_UDP has been changed from 2 to 1.	Applications may execute a wrong branch of code in the library and therefore change the behavior.
3	Value of member MEMCACHED_CONNECTION_UNIX_SOCKET has been changed from 3 to 2.	Applications may execute a wrong branch of code in the library and therefore change the behavior.

	Change	Effect
1	Field _namespace 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.
2	Field server_info 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	Field error_messages 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.
2	Field server_failure_counter_query_id 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.
3	Field version 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.

constants.h
[+] enum memcached_connection_t (3)

memcached.h
[+] struct memcached_st (2)

server.h
[+] struct memcached_server_st (3)

to the top

Problems with Data Types, Low Severity (8)

	Change	Effect
1	The member MEMCACHED_CONNECTION_MAX has been removed.	This may result in crash or incorrect behavior of applications because the library may not handle removed member anymore.
2	The member MEMCACHED_CONNECTION_UNKNOWN has been removed.	This may result in crash or incorrect behavior of applications because the library may not handle removed member anymore.

	Change	Effect
1	Size of this type has been changed from 508 bytes to 512 bytes.	The fields or parameters of such data type may be incorrectly initialized or accessed by old client applications.

	Change	Effect
1	Field hash_with_prefix_key has been renamed to hash_with_namespace.	Renaming of a field in data type may indicate a change in the semantic meaning of the field.

	Change	Effect
1	Value of member MEMCACHED_MAXIMUM_RETURN has been changed from 47 to 48.	Applications may execute a wrong branch of code in the library and therefore change the behavior.

	Change	Effect
1	Type of field callbacks has been changed from sasl_callback_t const* to sasl_callback_t*.	Replacement of the field data type may indicate a change in the semantic meaning of the field.

	Change	Effect
1	Size of this type has been changed from 17520 bytes to 17528 bytes.	The fields or parameters of such data type may be incorrectly initialized or accessed by old client applications.

	Change	Effect
1	Type of field pid has been changed from unsigned long to pid_t.	Replacement of the field data type may indicate a change in the semantic meaning of the field.

constants.h
[+] enum memcached_connection_t (2)

memcached.h
[+] struct memcached_st (1)
[+] struct memcached_st::anon-struct-memcached.h-96 (1)

return.h
[+] enum memcached_return_t (1)

sasl.h
[+] struct memcached_sasl_st (1)

server.h
[+] struct memcached_server_st (1)

stats.h
[+] struct memcached_stat_st (1)

to the top

Problems with Symbols, Low Severity (5)

	Change	Effect
1	Type of 3rd parameter data has been changed from void* to void const*.	Replacement of parameter data type may indicate a change in its semantic meaning.

	Change	Effect
1	Type of return value has been changed from sasl_callback_t const* to sasl_callback_t*.	Replacement of return type may indicate a change in its semantic meaning.

	Change	Effect
1	Type of 1st parameter self has been changed from memcached_server_instance_st to memcached_server_instance_st const.	Replacement of parameter data type may indicate a change in its semantic meaning.

	Change	Effect
1	Type of 1st parameter self has been changed from memcached_server_instance_st to memcached_server_instance_st const.	Replacement of parameter data type may indicate a change in its semantic meaning.

	Change	Effect
1	Type of 1st parameter self has been changed from memcached_server_instance_st to memcached_server_instance_st const.	Replacement of parameter data type may indicate a change in its semantic meaning.

callback.h, libmemcached.so.8.0.0
[+] memcached_callback_set ( memcached_st* ptr, enum memcached_callback_t const flag, void* data ) (1)

sasl.h, libmemcached.so.8.0.0
[+] memcached_get_sasl_callbacks ( memcached_st* ptr ) (1)

server.h, libmemcached.so.8.0.0
[+] memcached_server_name ( memcached_server_instance_st self ) (1)
[+] memcached_server_port ( memcached_server_instance_st self ) (1)
[+] memcached_server_response_count ( memcached_server_instance_st self ) (1)

to the top

Other Changes in Data Types (4)

	Change	Effect
1	The member MEMCACHED_CALLBACK_NAMESPACE with value 0 has been added.	No effect.

	Change	Effect
1	The member MEMCACHED_SERVER_TEMPORARILY_DISABLED with value 47 has been added.	No effect.

	Change	Effect
1	Field callbacks became non-const.	No effect.

	Change	Effect
1	The member MEMCACHED_SERVER_STATE_IN_TIMEOUT with value 4 has been added.	No effect.

constants.h
[+] enum memcached_callback_t (1)

return.h
[+] enum memcached_return_t (1)

sasl.h
[+] struct memcached_sasl_st (1)

server.h
[+] enum memcached_server_state_t (1)

to the top

Other Changes in Constants (4)

	Change	Effect
1	The constant MEMCACHED_CONNECTION_MAX with value 0 has been added.	No effect.

	Change	Effect
1	The constant MEMCACHED_CONNECTION_UNKNOWN with value 0 has been added.	No effect.

	Change	Effect
1	The constant MEMCACHED_SERVER_FAILURE_LIMIT with value 5 has been added.	No effect.

	Change	Effect
1	The constant MEMCACHED_SERVER_FAILURE_RETRY_TIMEOUT with value 2 has been added.	No effect.

constants.h
[+] MEMCACHED_CONNECTION_MAX
[+] MEMCACHED_CONNECTION_UNKNOWN
[+] MEMCACHED_SERVER_FAILURE_LIMIT
[+] MEMCACHED_SERVER_FAILURE_RETRY_TIMEOUT

to the top

Header Files (58)

algorithm.h
allocators.h
analyze.h
array.h
auto.h
basic_string.h
cache.h
callback.h
constants.h
delete.h
digest.h
dump.h
error.h
fetch.h
flush.h
flush_buffers.h
function.h
get.h
hash.h
hashkit.h
behavior.h (libhashkit/behavior.h)
configure.h (libhashkit/configure.h)
strerror.h (libhashkit/strerror.h)
types.h (libhashkit/types.h)
visibility.h (libhashkit/visibility.h)
behavior.h (libmemcached/behavior.h)
configure.h (libmemcached/configure.h)
strerror.h (libmemcached/strerror.h)
types.h (libmemcached/types.h)
visibility.h (libmemcached/visibility.h)
memcached.h
memcached_util.h
options.h
parse.h
ping.h
platform.h
pool.h
prefix_key.h
callback.h (protocol/callback.h)
protocol_binary.h
protocol_handler.h
quit.h
result.h
return.h
sasl.h
server.h
server_list.h
stats.h
storage.h
str_algorithm.h
string.h
util.h
flush.h (util/flush.h)
version.h (util/version.h)
vbucket.h
verbosity.h
version.h
watchpoint.h

to the top

Shared Libraries (4)

libhashkit.so.1.0.0
libmemcached.so.8.0.0
libmemcachedprotocol.so.0.0.0
libmemcachedutil.so.2.0.0

to the top