Eliot Miranda uploaded a new version of Kernel to project The Trunk: http://source.squeak.org/trunk/Kernel-eem.668.mcz
==================== Summary ====================
Name: Kernel-eem.668 Author: eem Time: 30 January 2012, 4:07:10.324 pm UUID: 6d7c03fa-7e34-49ee-af59-08c26564f9ef Ancestors: Kernel-cmm.667
Rip out the "prevent me debugging myself" primitive 19 from ContextPart>doPrimitive:method:receiver:args:.
=============== Diff against Kernel-cmm.667 ===============
Item was changed: ----- Method: ContextPart>>doPrimitive:method:receiver:args: (in category 'private') ----- doPrimitive: primitiveIndex method: meth receiver: receiver args: arguments "Simulate a primitive method whose index is primitiveIndex. The simulated receiver and arguments are given as arguments to this message. + If successful, push result and return resuming context, else ^ PrimitiveFailToken. + Any primitive which provokes execution needs to be intercepted and simulated - Any primitive which provikes execution needs to be intercepted and simulated to avoid execution running away."
| value | + "Judicious use of primitive 19 (a null primitive that doesn't do anything) prevents + the debugger from entering various run-away activities such as spawning a new + process, etc. Injudicious use results in the debugger not being able to debug + interesting code, such as the debugger itself. hence use primtiive 19 with care :-)" + "SystemNavigation new browseAllSelect: [:m| m primitive = 19]" + primitiveIndex = 19 ifTrue: - <primitive: 19> "Simulation guard" - "If successful, push result and return resuming context, - else ^ PrimitiveFailToken" - (primitiveIndex = 19) ifTrue: [ToolSet debugContext: self label:'Code simulation error' contents: nil].
"ContextPart>>blockCopy:; simulated to get startpc right" (primitiveIndex = 80 and: [receiver isKindOf: ContextPart]) ifTrue: [^self push: ((BlockContext newForMethod: receiver method) home: receiver home startpc: pc + 2 nargs: (arguments at: 1))]. (primitiveIndex = 81 and: [receiver isMemberOf: BlockContext]) "BlockContext>>value[:value:...]" ifTrue: [^receiver pushArgs: arguments from: self]. (primitiveIndex = 82 and: [receiver isMemberOf: BlockContext]) "BlockContext>>valueWithArguments:" ifTrue: [^receiver pushArgs: arguments first from: self]. primitiveIndex = 83 "afr 9/11/1998 19:50" "Object>>perform:[with:...]" ifTrue: [^self send: arguments first to: receiver with: arguments allButFirst super: false]. primitiveIndex = 84 "afr 9/11/1998 19:50" "Object>>perform:withArguments:" ifTrue: [^self send: arguments first to: receiver with: (arguments at: 2) super: false]. primitiveIndex = 188 ifTrue: [ arguments size = 2 ifTrue: [ "eem 5/27/2008 11:10 Object>>withArgs:executeMethod:" ^MethodContext sender: self receiver: receiver method: (arguments at: 2) arguments: (arguments at: 1) ]. arguments size = 3 ifTrue: [ "CompiledMethod class >> #receiver:withArguments:executeMethod:" ^MethodContext sender: self receiver: (arguments at: 1) method: (arguments at: 3) arguments: (arguments at: 2) ] ]. primitiveIndex = 189 ifTrue: [ "Object >> (#with:)*executeMethod" ^MethodContext sender: self receiver: receiver method: arguments last arguments: arguments allButLast ].
"Closure primitives" (primitiveIndex = 200 and: [receiver == self]) ifTrue: "ContextPart>>closureCopy:copiedValues:; simulated to get startpc right" [^self push: (BlockClosure outerContext: receiver startpc: pc + 2 numArgs: arguments first copiedValues: arguments last)]. ((primitiveIndex between: 201 and: 205) "BlockClosure>>value[:value:...]" or: [primitiveIndex between: 221 and: 222]) ifTrue: "BlockClosure>>valueNoContextSwitch[:]" [^receiver simulateValueWithArguments: arguments caller: self]. primitiveIndex = 206 ifTrue: "BlockClosure>>valueWithArguments:" [^receiver simulateValueWithArguments: arguments first caller: self].
primitiveIndex = 120 ifTrue:[ "FFI method" value := meth literals first tryInvokeWithArguments: arguments. ] ifFalse:[ arguments size > 6 ifTrue: [^PrimitiveFailToken]. value := primitiveIndex = 117 "named primitives" ifTrue:[self tryNamedPrimitiveIn: meth for: receiver withArgs: arguments] ifFalse:[receiver tryPrimitive: primitiveIndex withArgs: arguments]. ]. ^value == PrimitiveFailToken ifTrue: [PrimitiveFailToken] ifFalse: [self push: value]!