Binary compatibility report for the libmemcached library between 0.49 and 0.50 versions on x86

Test Info

Library Name	libmemcached
Version #1	0.49
Version #2	0.50
CPU Type	x86
GCC Version	4.6.1

Test Results

Total Header Files	55
Total Shared Libraries	4
Total Symbols / Types	164 / 190
Verdict	Incompatible (72.6%)

Problem Summary

	Severity	Count
Added Symbols	-	4
Removed Symbols	High	0
Problems with Data Types	High	2
	Medium	7
	Low	33
Problems with Symbols	High	0
	Medium	1
	Low	1
Problems with Constants	Low	0
Other Changes in Data Types	-	2
Other Changes in Constants	-	1

Added Symbols (4)

behavior.h, libmemcached.so.8.0.0
libmemcached_string_behavior ( enum memcached_behavior_t const flag )
libmemcached_string_distribution ( enum memcached_server_distribution_t const flag )

flush.h, libmemcachedutil.so.2.0.0
libmemcached_util_flush ( char const* hostname, in_port_t port, enum memcached_return_t* ret )

memcached.h, libmemcached.so.8.0.0
memcached_query_id ( memcached_st const* p1 )

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Problems with Data Types, High Severity (2)

	Change	Effect
1	Field distribution_hashkit 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 17516 bytes to 17520 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.

memcached.h
[+] struct memcached_st (1)

server.h
[+] struct memcached_server_st (1)

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Problems with Data Types, Medium Severity (7)

	Change	Effect
1	Field delete 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 configure has been changed from 12 bytes to 16 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.
2	Size of field result has been changed from 296 bytes to 304 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	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.

	Change	Effect
1	Field count 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 state 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 __future 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.

callback.h
[+] struct memcached_binary_protocol_callback_v1_st (1)

memcached.h
[+] struct memcached_st (2)
[+] struct memcached_st::anon-struct-memcached.h-161 (1)

result.h
[+] struct memcached_result_st (1)

server.h
[+] struct memcached_server_st (1)

stats.h
[+] struct memcached_stat_st (1)

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Problems with Symbols, Medium Severity (1)

	Change	Effect
1	Type of 1st parameter ptr has been changed from memcached_st const* to memcached_st* (became non-const).	This function may change parameter ptr, but it will be treated as const by old client applications. This may result in crash or incorrect behavior of applications.

stats.h, libmemcached.so.7.0.0
[+] memcached_stat_get_keys ( memcached_st const* ptr, memcached_stat_st* memc_stat, memcached_return_t* error ) (1)

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Problems with Data Types, Low Severity (33)

	Change	Effect
1	Size of this type has been changed from 52 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 field v1 has been changed from 52 bytes to 56 bytes.	Previous accesses of applications and library functions to this field may be broken.

	Change	Effect
1	Value of member MEMCACHED_MAXIMUM_RETURN has been changed from 46 to 47.	Applications may execute a wrong branch of code in the library and therefore change the behavior.

	Change	Effect
1	Size of this type has been changed from 516 bytes to 508 bytes.	The fields or parameters of such data type may be incorrectly initialized or accessed by old client applications.
2	Type of field allocators has been changed from struct memcached_st::_allocators_st to struct memcached_allocator_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 12 bytes to 16 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 296 bytes to 304 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 17516 bytes to 17520 bytes.	The fields or parameters of such data type may be incorrectly initialized or accessed by old client applications.
2	Type of field root has been changed from memcached_st const* to memcached_st*.	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 156 bytes to 160 bytes.	The fields or parameters of such data type may be incorrectly initialized or accessed by old client applications.
2	Type of field bytes has been changed from uint64_t to unsigned long long.	Replacement of the field data type may indicate a change in the semantic meaning of the field.
3	Type of field bytes_read has been changed from uint64_t to unsigned long long.	Replacement of the field data type may indicate a change in the semantic meaning of the field.
4	Type of field bytes_written has been changed from uint64_t to unsigned long long.	Replacement of the field data type may indicate a change in the semantic meaning of the field.
5	Type of field cmd_get has been changed from uint64_t to unsigned long long.	Replacement of the field data type may indicate a change in the semantic meaning of the field.
6	Type of field cmd_set has been changed from uint64_t to unsigned long long.	Replacement of the field data type may indicate a change in the semantic meaning of the field.
7	Type of field connection_structures has been changed from uint32_t to unsigned long.	Replacement of the field data type may indicate a change in the semantic meaning of the field.
8	Type of field curr_connections has been changed from uint32_t to unsigned long.	Replacement of the field data type may indicate a change in the semantic meaning of the field.
9	Type of field curr_items has been changed from uint32_t to unsigned long.	Replacement of the field data type may indicate a change in the semantic meaning of the field.
10	Type of field evictions has been changed from uint64_t to unsigned long long.	Replacement of the field data type may indicate a change in the semantic meaning of the field.
11	Type of field get_hits has been changed from uint64_t to unsigned long long.	Replacement of the field data type may indicate a change in the semantic meaning of the field.
12	Type of field get_misses has been changed from uint64_t to unsigned long long.	Replacement of the field data type may indicate a change in the semantic meaning of the field.
13	Type of field limit_maxbytes has been changed from uint64_t to unsigned long long.	Replacement of the field data type may indicate a change in the semantic meaning of the field.
14	Type of field pid has been changed from uint32_t to unsigned long.	Replacement of the field data type may indicate a change in the semantic meaning of the field.
15	Type of field pointer_size has been changed from uint32_t to unsigned long.	Replacement of the field data type may indicate a change in the semantic meaning of the field.
16	Type of field rusage_system_microseconds has been changed from uint32_t to unsigned long.	Replacement of the field data type may indicate a change in the semantic meaning of the field.
17	Type of field rusage_system_seconds has been changed from uint32_t to unsigned long.	Replacement of the field data type may indicate a change in the semantic meaning of the field.
18	Type of field rusage_user_microseconds has been changed from uint32_t to unsigned long.	Replacement of the field data type may indicate a change in the semantic meaning of the field.
19	Type of field rusage_user_seconds has been changed from uint32_t to unsigned long.	Replacement of the field data type may indicate a change in the semantic meaning of the field.
20	Type of field threads has been changed from uint32_t to unsigned long.	Replacement of the field data type may indicate a change in the semantic meaning of the field.
21	Type of field time has been changed from uint32_t to unsigned long.	Replacement of the field data type may indicate a change in the semantic meaning of the field.
22	Type of field total_connections has been changed from uint32_t to unsigned long.	Replacement of the field data type may indicate a change in the semantic meaning of the field.
23	Type of field total_items has been changed from uint32_t to unsigned long.	Replacement of the field data type may indicate a change in the semantic meaning of the field.
24	Type of field uptime has been changed from uint32_t to unsigned long.	Replacement of the field data type may indicate a change in the semantic meaning of the field.

callback.h
[+] struct memcached_binary_protocol_callback_v1_st (1)
[+] union memcached_binary_protocol_callback_st::anon-union-callback.h-406 (1)

constants.h
[+] enum memcached_return_t (1)

memcached.h
[+] struct memcached_st (2)
[+] struct memcached_st::anon-struct-memcached.h-161 (1)

result.h
[+] struct memcached_result_st (1)

server.h
[+] struct memcached_server_st (2)

stats.h
[+] struct memcached_stat_st (24)

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Problems with Symbols, Low Severity (1)

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

stats.h, libmemcached.so.7.0.0
[+] memcached_stat_get_keys ( memcached_st const* ptr, memcached_stat_st* memc_stat, memcached_return_t* error ) (1)

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Other Changes in Data Types (2)

	Change	Effect
1	The member MEMCACHED_IN_PROGRESS with value 46 has been added.	No effect.

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

constants.h
[+] enum memcached_return_t (1)

server.h
[+] struct memcached_server_st (1)

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Other Changes in Constants (1)

	Change	Effect
1	The constant MEMCACHED_MAXIMUM_INTEGER_DISPLAY_LENGTH with value 20 has been added.	No effect.

constants.h
[+] MEMCACHED_MAXIMUM_INTEGER_DISPLAY_LENGTH

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Header Files (55)

algorithm.h
allocators.h
analyze.h
array.h
auto.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
sasl.h
server.h
server_list.h
stats.h
storage.h
str_algorithm.h
string.h
util.h
version.h (util/version.h)
vbucket.h
verbosity.h
version.h
watchpoint.h

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Shared Libraries (4)

libhashkit.so.1.0.0
libmemcached.so.7.0.0
libmemcachedprotocol.so.0.0.0
libmemcachedutil.so.2.0.0

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