Binary compatibility report for the libjs library between 1.5 and 1.7.0 versions on x86

Test Info

Library Name	libjs
Version #1	1.5
Version #2	1.7.0
CPU Type	x86
GCC Version	4.6.1

Test Results

Total Header Files	1
Total Shared Libraries	1
Total Symbols / Types	238 / 171
Verdict	Incompatible (1.3%)

Problem Summary

	Severity	Count
Added Symbols	-	19
Removed Symbols	High	0
Problems with Data Types	High	0
	Medium	4
	Low	5
Problems with Symbols	High	0
	Medium	0
	Low	2
Problems with Constants	Low	1
Other Changes in Data Types	-	4
Other Changes in Constants	-	40

Added Symbols (19)

jsapi.h, libjs.so
JS_CStringsAreUTF8 ( )
JS_DecodeBytes ( JSContext* cx, char const* src, size_t srclen, jschar* dst, size_t* dstlenp )
JS_EncodeCharacters ( JSContext* cx, jschar const* src, size_t srclen, char* dst, size_t* dstlenp )
JS_EnumerateResolvedStandardClasses ( JSContext* cx, JSObject* obj, JSIdArray* ida )
JS_GetClassObject ( JSContext* cx, JSObject* obj, JSProtoKey key, JSObject** objp )
JS_GetFunctionArity ( JSFunction* fun )
JS_GetMethod ( JSContext* cx, JSObject* obj, char const* name, JSObject** objp, jsval* vp )
JS_GetMethodById ( JSContext* cx, JSObject* obj, jsid id, JSObject** objp, jsval* vp )
JS_GetPropertyAttrsGetterAndSetter ( JSContext* cx, JSObject* obj, char const* name, uintN* attrsp, JSBool* foundp, JSPropertyOp* getterp, JSPropertyOp* setterp )
JS_GetUCPropertyAttrsGetterAndSetter ( JSContext* cx, JSObject* obj, jschar const* name, size_t namelen, uintN* attrsp, JSBool* foundp, JSPropertyOp* getterp, JSPropertyOp* setterp )
JS_HasInstance ( JSContext* cx, JSObject* obj, jsval v, JSBool* bp )
JS_LeaveLocalRootScopeWithResult ( JSContext* cx, jsval rval )
JS_NewPropertyIterator ( JSContext* cx, JSObject* obj )
JS_NextProperty ( JSContext* cx, JSObject* iterobj, jsid* idp )
JS_RestoreFrameChain ( JSContext* cx, JSStackFrame* fp )
JS_SaveFrameChain ( JSContext* cx )
JS_SetContextCallback ( JSRuntime* rt, JSContextCallback cxCallback )
JS_SetGCParameter ( JSRuntime* rt, JSGCParamKey key, uint32 value )
JS_ThrowReportedError ( JSContext* cx, char const* message, JSErrorReport* reportp )

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Problems with Data Types, Medium Severity (4)

	Change	Effect
1	Type of field flags has been changed from uint8 (1 byte) to uint16 (2 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	Type of field nargs has been changed from uint8 (1 byte) to uint16 (2 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	Type of field extra has been changed from uint16 (2 bytes) to uint32 (4 bytes).	1) This field may be incorrectly initialized or accessed by applications. 2) Size of the inclusive type has been changed.

	Change	Effect
1	Value of member JSTYPE_LIMIT has been changed from 6 to 8.	Applications may execute a wrong branch of code in the library and therefore change the behavior.

jsapi.h
[+] struct JSFunctionSpec (3)

jspubtd.h
[+] enum JSType (1)

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Problems with Data Types, Low Severity (5)

	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	Field localeGetErrorMessage 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 20 bytes.	The fields or parameters of such data type may be incorrectly initialized or accessed by old client applications.

	Change	Effect
1	Field subsume 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 20 bytes to 24 bytes.	The fields or parameters of such data type may be incorrectly initialized or accessed by old client applications.

jsapi.h
[+] struct JSFunctionSpec (1)
[+] struct JSLocaleCallbacks (2)
[+] struct JSPrincipals (2)

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Problems with Symbols, Low Severity (2)

	Change	Effect
1	Base type of 1st parameter cx has been changed from struct JSContext to struct JSRuntime.	Replacement of parameter base type may indicate a change in its semantic meaning.
2	1st parameter cx has been renamed to rt.	Renaming of a parameter may indicate a change in its semantic meaning.

jsapi.h, libjs.so
[+] JS_SetObjectPrincipalsFinder ( JSContext* cx, JSObjectPrincipalsFinder fop ) (2)

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Problems with Constants, Low Severity (1)

	Change	Effect
1	The value of constant JSFUN_FLAGS_MASK has been changed from 0xf8 to 0x07f8.	Applications will pass an old value of this constant as the parameter to the new-version library functions, that expect a new one. This may result in crash of incorrect behavior of applications.

jsapi.h
[+] JSFUN_FLAGS_MASK

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Other Changes in Data Types (4)

	Change	Effect
1	The member JSTYPE_NULL with value 6 has been added.	No effect.
2	The member JSTYPE_XML with value 7 has been added.	No effect.

	Change	Effect
1	The member JSVERSION_1_6 with value 160 has been added.	No effect.
2	The member JSVERSION_1_7 with value 170 has been added.	No effect.

jspubtd.h
[+] enum JSType (2)
[+] enum JSVersion (2)

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Other Changes in Constants (40)

	Change	Effect
1	The constant JS_DEFAULT_XML_NAMESPACE_ID with value ((jsid) JSVAL_VOID) has been added.	No effect.

	Change	Effect
1	The constant JSCLASS_CACHED_PROTO_WIDTH with value 8 has been added.	No effect.

	Change	Effect
1	The constant JSCLASS_CONSTRUCT_PROTOTYPE with value (1<<6) has been added.	No effect.

	Change	Effect
1	The constant JSCLASS_DOCUMENT_OBSERVER with value (1<<7) has been added.	No effect.

	Change	Effect
1	The constant JSCLASS_IS_ANONYMOUS with value (1<<(JSCLASS_HIGH_FLAGS_SHIFT+1)) has been added.	No effect.

	Change	Effect
1	The constant JSCLASS_IS_EXTENDED with value (1<<(JSCLASS_HIGH_FLAGS_SHIFT+0)) has been added.	No effect.

	Change	Effect
1	The constant JSCLASS_IS_GLOBAL with value (1<<(JSCLASS_HIGH_FLAGS_SHIFT+2)) has been added.	No effect.

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

	Change	Effect
1	The constant JSFUN_GENERIC_NATIVE with value 0x08 has been added.	No effect.

	Change	Effect
1	The constant JSFUN_THISP_BOOLEAN with value 0x0400 has been added.	No effect.

	Change	Effect
1	The constant JSFUN_THISP_NUMBER with value 0x0200 has been added.	No effect.

	Change	Effect
1	The constant JSFUN_THISP_PRIMITIVE with value 0x0700 has been added.	No effect.

	Change	Effect
1	The constant JSFUN_THISP_STRING with value 0x0100 has been added.	No effect.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

jsapi.h
[+] JS_DEFAULT_XML_NAMESPACE_ID
[+] JSCLASS_CACHED_PROTO_WIDTH
[+] JSCLASS_CONSTRUCT_PROTOTYPE
[+] JSCLASS_DOCUMENT_OBSERVER
[+] JSCLASS_IS_ANONYMOUS
[+] JSCLASS_IS_EXTENDED
[+] JSCLASS_IS_GLOBAL
[+] JSCLASS_NO_RESERVED_MEMBERS
[+] JSFUN_GENERIC_NATIVE
[+] JSFUN_THISP_BOOLEAN
[+] JSFUN_THISP_NUMBER
[+] JSFUN_THISP_PRIMITIVE
[+] JSFUN_THISP_STRING

jsconfig.h
[+] JS_HAS_ARRAY_EXTRAS
[+] JS_HAS_BLOCK_SCOPE
[+] JS_HAS_CATCH_GUARD
[+] JS_HAS_CONST
[+] JS_HAS_DEBUGGER_KEYWORD
[+] JS_HAS_DESTRUCTURING
[+] JS_HAS_EVAL_THIS_SCOPE
[+] JS_HAS_EXPORT_IMPORT
[+] JS_HAS_FUN_EXPR_STMT
[+] JS_HAS_GENERATORS
[+] JS_HAS_GETTER_SETTER
[+] JS_HAS_LVALUE_RETURN
[+] JS_HAS_NO_SUCH_METHOD
[+] JS_HAS_OBJ_PROTO_PROP
[+] JS_HAS_OBJ_WATCHPOINT
[+] JS_HAS_PERL_SUBSTR
[+] JS_HAS_RESERVED_ECMA_KEYWORDS
[+] JS_HAS_RESERVED_JAVA_KEYWORDS
[+] JS_HAS_SCRIPT_OBJECT
[+] JS_HAS_SHARP_VARS
[+] JS_HAS_SPARSE_ARRAYS
[+] JS_HAS_STR_HTML_HELPERS
[+] JS_HAS_TOSOURCE
[+] JS_HAS_UNEVAL
[+] JS_HAS_XDR
[+] JS_HAS_XDR_FREEZE_THAW
[+] JS_HAS_XML_SUPPORT

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Header Files (1)

jsapi.h

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Shared Libraries (1)

libjs.so

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