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HOWTO-NativeBoost.md

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HOWTO restore NativeBoost

NatiuveBoost was removed in Spur because we do not want executable memory anymore (and other maintainability issues). Here some notes if you want to restore it.

Changes in VM

We need a couple of changes in the VM:

add setjmp.h in Cogit class>#declareCVarsIn:

...
aCCodeGenerator
	addHeaderFile:'<stddef.h>'; "for e.g. offsetof"
	addHeaderFile:'<setjmp.h>'; "<-- add this"
...

add executable memory allocation:

in CoInterpreter>>#initStackPagesAndInterpret

self cppIf: #PHAROVM_USE_EXECUTABLE_MEMORY 
	ifTrue:  [
		self 
			sqMakeMemoryExecutableFrom: objectMemory startOfMemory asUnsignedInteger
			To: objectMemory memoryLimit asUnsignedInteger ]
	ifFalse: [ 
		self 
			sqMakeMemoryNotExecutableFrom: objectMemory startOfMemory asUnsignedInteger
			To: objectMemory memoryLimit asUnsignedInteger ].
self 
	sqMakeMemoryNotExecutableFrom: theStackMemory asUnsignedInteger
	To: theStackMemory asUnsignedInteger + stackPagesBytes.

in Spur32BitCoMemoryManager>>#assimilateNewSegment:

self 
	cppIf: #PHAROVM_USE_EXECUTABLE_MEMORY
	ifTrue: [ coInterpreter sqMakeMemoryExecutableFrom: segInfo segStart To: segInfo segLimit ]
	ifFalse: [ coInterpreter sqMakeMemoryNotExecutableFrom: segInfo segStart To: segInfo segLimit ]

in CMakeMaker

take NBCogCocoaIOSConfig, NBCogUnixConfig and NBCogWindowsConfig as models