Binary compatibility report for the V8 library between 3.20.11.2 and 3.20.12 versions on x86

Test Info

Library Name	V8
Version #1	3.20.11.2
Version #2	3.20.12
CPU Type	x86
GCC Version	4.6.1

Test Results

Total Header Files	5
Total Shared Libraries	1
Total Symbols / Types	560 / 402
Verdict	Incompatible (1.2%)

Problem Summary

	Severity	Count
Added Symbols	-	6
Removed Symbols	High	5
Problems with Data Types	High	2
	Medium	0
	Low	2
Problems with Symbols	High	0
	Medium	0
	Low	1
Problems with Constants	Low	0

Added Symbols (6)

v8.h, libv8.so
namespace v8
BooleanObject::ValueOf ( ) const
Date::ValueOf ( ) const
Message::IsSharedCrossOrigin ( ) const
NumberObject::ValueOf ( ) const
StringObject::ValueOf ( ) const
SymbolObject::ValueOf ( ) const

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Removed Symbols (5)

v8.h, libv8.so
namespace v8
BooleanObject::BooleanValue ( ) const
Date::NumberValue ( ) const
NumberObject::NumberValue ( ) const
StringObject::StringValue ( ) const
SymbolObject::SymbolValue ( ) const

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Problems with Data Types, High Severity (2)

	Change	Effect
1	Virtual method ArrayBuffer::Allocator::AllocateUninitialized ( size_t ) has been added to this class.	The layout of v-table has been changed. Call of any virtual method at higher position in this class or its subclasses may result in crash or incorrect behavior of applications.

Offset	Virtual Table (Old) - 6 entries	Virtual Table (New) - 7 entries
0	(int (*)(...))0	(int (*)(...))0
4	(int (*)(...))(& typeinfo)	(int (*)(...))(& typeinfo)
8	ArrayBuffer::~Allocator	ArrayBuffer::~Allocator
12	ArrayBuffer::~Allocator	ArrayBuffer::~Allocator
16	__cxa_pure_virtual	__cxa_pure_virtual
20	__cxa_pure_virtual	ArrayBuffer::Allocator::AllocateUninitialized
24		__cxa_pure_virtual

	Change	Effect
1	Size of this type has been changed from 0 bytes to 4 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.

v8.h
namespace v8
[+] class ArrayBuffer::Allocator (1)
[+] struct Handle<Symbol> (1)

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Problems with Data Types, Low Severity (2)

	Change	Effect
1	Field resource_is_shared_cross_origin_ has been added to this type.	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 12 bytes to 16 bytes.	The fields or parameters of such data type may be incorrectly initialized or accessed by old client applications.

v8.h
namespace v8
[+] class ScriptOrigin (2)

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Problems with Symbols, Low Severity (1)

	Change	Effect
1	The initial value of this global data has been changed from 134 to 135.	Applications will use an old value of this data instead of the new one. This may cause incorrect behavior of applications.

v8.h
namespace v8::internal
[+] Internals::kEmptyStringRootIndex [data] (1)

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Header Files (5)

v8-preparser.h
v8-profiler.h
v8-testing.h
v8.h
v8stdint.h

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Shared Libraries (1)

libv8.so

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