Binary compatibility report for the userspace-rcu library between 0.5.4 and 0.6.1 versions on x86

Test Info

Library Name	userspace-rcu
Version #1	0.5.4
Version #2	0.6.1
CPU Type	x86
GCC Version	4.6.1

Test Results

Total Header Files	25
Total Shared Libraries	10
Total Symbols / Types	35 / 41
Verdict	Incompatible (38.6%)

Problem Summary

	Severity	Count
Added Symbols	-	25
Removed Symbols	High	12
Problems with Data Types	High	0
	Medium	1
	Low	5
Problems with Symbols	High	0
	Medium	2
	Low	1
Problems with Constants	Low	2
Other Changes in Constants	-	8

Added Symbols (25)

urcu-call-rcu.h, liburcu.so.1.0.0
call_rcu_after_fork_child ( )
call_rcu_data_free ( struct call_rcu_data* crdp )
call_rcu_mb ( struct rcu_head* head, void(*func)(struct rcu_head*) )
create_all_cpu_call_rcu_data_mb ( unsigned long flags )
create_call_rcu_data_mb ( unsigned long flags, int cpu_affinity )
free_all_cpu_call_rcu_data_mb ( )
get_call_rcu_data_mb ( )
get_call_rcu_thread_mb ( struct call_rcu_data* crdp )
get_cpu_call_rcu_data_mb ( int cpu )
get_default_call_rcu_data_mb ( )
get_thread_call_rcu_data_mb ( )
set_cpu_call_rcu_data_mb ( int cpu, struct call_rcu_data* crdp )
set_thread_call_rcu_data_mb ( struct call_rcu_data* crdp )

urcu-defer.h, liburcu.so.1.0.0
defer_rcu_mb ( void(*fct)(void*), void* p )
rcu_defer_barrier_mb ( )
rcu_defer_barrier_thread_mb ( )
rcu_defer_register_thread_mb ( )
rcu_defer_unregister_thread_mb ( )

urcu.h, liburcu.so.1.0.0
rcu_gp_ctr_mb [data]
rcu_init_mb ( )
rcu_read_lock_mb ( )
rcu_read_unlock_mb ( )
rcu_register_thread_mb ( )
rcu_unregister_thread_mb ( )
synchronize_rcu_mb ( )

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Removed Symbols (12)

urcu-defer.h, liburcu-defer.so.0.0.0
defer_rcu ( void(*fct)(void*), void* p )
rcu_defer_barrier ( )
rcu_defer_barrier_thread ( )
rcu_defer_register_thread ( )
rcu_defer_unregister_thread ( )

urcu-static.h, liburcu.so.0.0.0
rcu_gp_ctr [data]

urcu.h, liburcu.so.0.0.0
rcu_init ( )
rcu_read_lock ( )
rcu_read_unlock ( )
rcu_register_thread ( )
rcu_unregister_thread ( )
synchronize_rcu ( )

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Problems with Data Types, Medium Severity (1)

	Change	Effect
1	Size of field init has been changed from 8 bytes to 20 bytes.	1) Size of the inclusive type has been changed. 2) Previous accesses of applications and library functions to this field may be broken.

rculfqueue.h
[+] struct cds_lfq_queue_rcu (1)

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Problems with Symbols, Medium Severity (2)

	Change	Effect
1	2nd parameter release has been removed from the calling stack.	This parameter will be ignored by the function.

	Change	Effect
1	Parameter release of type void()(struct urcu_ref) has been added to the calling stack.	This parameter will not be initialized by old clients.

rculfqueue.h, librculfqueue.so.0.0.0
[+] cds_lfq_dequeue_rcu ( struct cds_lfq_queue_rcu* q, void(*release)(struct urcu_ref*) ) (1)
[+] cds_lfq_init_rcu ( struct cds_lfq_queue_rcu* q ) (1)

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Problems with Data Types, Low Severity (5)

	Change	Effect
1	Field queue 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	Field rcu_head 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.
3	Size of this type has been changed from 8 bytes to 20 bytes.	The fields or parameters of such data type may be incorrectly initialized or accessed by old client applications.

	Change	Effect
1	Field release 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 16 bytes to 32 bytes.	The fields or parameters of such data type may be incorrectly initialized or accessed by old client applications.

rculfqueue.h
[+] struct cds_lfq_node_rcu (3)
[+] struct cds_lfq_queue_rcu (2)

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Problems with Symbols, Low Severity (1)

	Change	Effect
1	Type of this global data has been changed from int to int32_t.	Replacement of data type may indicate a change in semantic meaning.

urcu-static.h, liburcu.so.0.0.0
[+] gp_futex [data] (1)

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Problems with Constants, Low Severity (2)

	Change	Effect
1	The constant DEFER_QUEUE_SIZE with value (1 << 12) has been removed.	The value of this constant may no longer be properly handled by new-version library functions.

	Change	Effect
1	The constant DQ_FCT_BIT with value (1 << 0) has been removed.	The value of this constant may no longer be properly handled by new-version library functions.

urcu-defer-static.h
[+] DEFER_QUEUE_SIZE
[+] DQ_FCT_BIT

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Other Changes in Constants (8)

	Change	Effect
1	The constant URCU_CALL_RCU_RT with value 0x1 has been added.	No effect.

	Change	Effect
1	The constant URCU_CALL_RCU_RUNNING with value 0x2 has been added.	No effect.

	Change	Effect
1	The constant URCU_CALL_RCU_STOP with value 0x4 has been added.	No effect.

	Change	Effect
1	The constant URCU_CALL_RCU_STOPPED with value 0x8 has been added.	No effect.

	Change	Effect
1	The constant WFQ_ADAPT_ATTEMPTS with value 10 has been added.	No effect.

	Change	Effect
1	The constant WFQ_WAIT with value 10 has been added.	No effect.

	Change	Effect
1	The constant CDS_WFS_ADAPT_ATTEMPTS with value 10 has been added.	No effect.

	Change	Effect
1	The constant CDS_WFS_WAIT with value 10 has been added.	No effect.

urcu-call-rcu.h
[+] URCU_CALL_RCU_RT
[+] URCU_CALL_RCU_RUNNING
[+] URCU_CALL_RCU_STOP
[+] URCU_CALL_RCU_STOPPED

wfqueue.h
[+] WFQ_ADAPT_ATTEMPTS
[+] WFQ_WAIT

wfstack.h
[+] CDS_WFS_ADAPT_ATTEMPTS
[+] CDS_WFS_WAIT

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Header Files (25)

arch.h
arch_generic.h
compiler.h
config.h
hlist.h
list.h
rcuhlist.h
rculfqueue-static.h
rculfqueue.h
rculfstack-static.h
rculfstack.h
rculist.h
system.h
uatomic_arch.h
uatomic_generic.h
urcu-defer-static.h
urcu-defer.h
urcu-futex.h
urcu-pointer-static.h
urcu-pointer.h
urcu-static.h
urcu.h
urcu_ref.h
wfqueue.h
wfstack.h

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Shared Libraries (10)

librculfqueue.so.0.0.0
librculfstack.so.0.0.0
liburcu-bp.so.0.0.0
liburcu-defer.so.0.0.0
liburcu-mb.so.0.0.0
liburcu-qsbr.so.0.0.0
liburcu-signal.so.0.0.0
liburcu.so.0.0.0
libwfqueue.so.0.0.0
libwfstack.so.0.0.0

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