Binary compatibility report for the V8 library between 3.6.6.25 and 3.7.0 versions on x86

Test Info

Library Name	V8
Version #1	3.6.6.25
Version #2	3.7.0
CPU Type	x86
GCC Version	4.6.1

Test Results

Total Header Files	5
Total Shared Libraries	1
Total Symbols / Types	399 / 293
Verdict	Incompatible (1.6%)

Problem Summary

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

Added Symbols (2)

v8.h, libv8.so
namespace v8
Extension::Extension [in-charge] ( char const* name, char const* source, int dep_count, char const** deps, int source_length )
Extension::Extension [not-in-charge] ( char const* name, char const* source, int dep_count, char const** deps, int source_length )

to the top

Removed Symbols (2)

v8.h, libv8.so
namespace v8
Extension::Extension [in-charge] ( char const* name, char const* source, int dep_count, char const** deps )
Extension::Extension [not-in-charge] ( char const* name, char const* source, int dep_count, char const** deps )

to the top

Problems with Data Types, High Severity (1)

	Change	Effect
1	Size of this class has been increased from 24 bytes to 36 bytes.	1) An object of this class can be allocated by the applications and old size will be hardcoded at the compile time. Call of any exported constructor will break the memory of neighbouring objects on the stack or heap. 2) The memory layout and size of subclasses will be changed.

v8.h
namespace v8
[+] class Extension (1)

to the top

Problems with Symbols, High Severity (2)

	Change	Effect
1	Parameters list has been changed.	The name of the appropriate symbol for this function on binary level has been changed from _ZN2v89ExtensionC1EPKcS2_iPS2_ to _ZN2v89ExtensionC1EPKcS2_iPS2_i. This may cause "undefined reference" linker error in old client applications.

	Change	Effect
1	Parameters list has been changed.	The name of the appropriate symbol for this function on binary level has been changed from _ZN2v89ExtensionC2EPKcS2_iPS2_ to _ZN2v89ExtensionC2EPKcS2_iPS2_i. This may cause "undefined reference" linker error in old client applications.

v8.h, libv8.so
namespace v8
[+] Extension::Extension [in-charge] ( char const* name, char const* source, int dep_count, char const** deps ) (1)
[+] Extension::Extension [not-in-charge] ( char const* name, char const* source, int dep_count, char const** deps ) (1)

to the top

Problems with Symbols, Medium Severity (1)

	Change	Effect
1	Type of return value became const (has been changed from String::ExternalAsciiStringResource* to String::ExternalAsciiStringResource const*).	The return value will be treated as non-const by old client applications. This may result in crash or incorrect behavior of applications.

v8.h, libv8.so
namespace v8
[+] String::GetExternalAsciiStringResource ( ) const (1)

to the top

Problems with Data Types, Low Severity (2)

	Change	Effect
1	Field source_length_ 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	Type of field source_ has been changed from char const* (4 bytes) to ExternalAsciiStringResourceImpl (12 bytes).	Size of the inclusive type has changed.

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

to the top

Header Files (5)

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

to the top

Shared Libraries (1)

libv8.so

to the top