Binary compatibility report between libevent_core-2.1.so.7.0.1 (2.1.12) and libevent_core-2.2.so.1.0.0 (current) objects on x86_64

Test Info

Module Name	libevent_core-2.1
Version #1	2.1.12
Version #2	current
Arch	x86_64
GCC Version	7.5.0

Test Results

Total Header Files	11
Total Source Files	13
Total Objects	1
Total Symbols / Types	240 / 83
Compatibility	66.9%

Problem Summary

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

Added Symbols 11

buffer.h, libevent_core-2.2.so.1.0.0
evbuffer_get_max_read ( struct evbuffer* buf )
evbuffer_set_max_read ( struct evbuffer* buf, size_t max )

bufferevent.h, libevent_core-2.2.so.1.0.0
bufferevent_replacefd ( struct bufferevent* bev, int fd )
bufferevent_socket_connect_hostname_hints ( struct bufferevent* bev, struct evdns_base* evdns_base, struct addrinfo const* hints_in, char const* hostname, int port )

event.h, libevent_core-2.2.so.1.0.0
event_base_get_signal_method ( struct event_base const* base )

util.h, libevent_core-2.2.so.1.0.0
evutil_make_listen_socket_not_ipv6only ( int sock )

watch.h, libevent_core-2.2.so.1.0.0
evwatch_base ( struct evwatch* watcher )
evwatch_check_new ( struct event_base* base, evwatch_check_cb callback, void* arg )
evwatch_free ( struct evwatch* watcher )
evwatch_prepare_get_timeout ( struct evwatch_prepare_cb_info const* info, struct timeval* timeout )
evwatch_prepare_new ( struct event_base* base, evwatch_prepare_cb callback, void* arg )

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Problems with Data Types, Medium Severity 11

	Change	Effect
1	Field max_read 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 ev_read has been changed from 128 bytes to 120 bytes.	Previous accesses of applications and library functions to this field may be broken.
2	Size of field ev_write has been changed from 128 bytes to 120 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 sig has been changed from 160 bytes to 672 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 th_notify has been changed from 128 bytes to 120 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.
3	Size of field timeheap has been changed from 16 bytes to 24 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 relative position of field ev_ has been changed from 4 to 6.	1) Applications will access incorrect memory when attempting to access this field. 2) Size of the inclusive type has been changed.
2	The relative position of field ev_base has been changed from 3 to 5.	1) Applications will access incorrect memory when attempting to access this field. 2) Size of the inclusive type has been changed.
3	The relative position of field ev_events has been changed from 5 to 3.	1) Applications will access incorrect memory when attempting to access this field. 2) Size of the inclusive type has been changed.
4	The relative position of field ev_res has been changed from 6 to 4.	1) Applications will access incorrect memory when attempting to access this field. 2) Size of the inclusive type has been changed.

	Change	Effect
1	Type of field min_heap_idx has been changed from int (4 bytes) to size_t (8 bytes).	This field may be incorrectly initialized or accessed by applications.

buffer.h
[+] struct evbuffer 1

bufferevent_struct.h
[+] struct bufferevent 2

event.h
[+] struct event_base 3

event_struct.h
[+] struct event 4
[+] union anon-union-event_struct.h-127 1

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Problems with Data Types, Low Severity 5

	Change	Effect
1	Size of this type has been changed from 136 bytes to 144 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 392 bytes to 376 bytes.	The fields or parameters of such data type may be incorrectly initialized or accessed by old client applications.

	Change	Effect
1	Field watchers has been added to this type.	1) This field will not be initialized by old clients. 2) 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 664 bytes to 1208 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 128 bytes to 120 bytes.	The fields or parameters of such data type may be incorrectly initialized or accessed by old client applications.

buffer.h
[+] struct evbuffer 1

bufferevent_struct.h
[+] struct bufferevent 1

event.h
[+] struct event_base 2

event_struct.h
[+] struct event 1

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Other Changes in Data Types 2

	Change	Effect
1	The member EVENT_BASE_FLAG_DISALLOW_SIGNALFD with value 128 has been added.	No effect.
2	The member EVENT_BASE_FLAG_EPOLL_DISALLOW_TIMERFD with value 64 has been added.	No effect.

event.h
[+] enum event_base_config_flag 2

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Header Files 11

buffer.h
buffer_compat.h
bufferevent.h
bufferevent_compat.h
bufferevent_struct.h
event.h
event_compat.h
event_struct.h
listener.h
thread.h
util.h

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Source Files 13

buffer.c
bufferevent.c
bufferevent_filter.c
bufferevent_pair.c
bufferevent_ratelim.c
bufferevent_sock.c
event.c
evthread.c
evutil.c
evutil_rand.c
evutil_time.c
listener.c
log.c

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Objects 1

libevent_core-2.1.so.7.0.1

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