27 Nov
2008
27 Nov
'08
8:52 p.m.
On 27.11.2008, at 18:44, Keith Hodges wrote:
Hello All,
I need a villainous superpower that I haven't needed before, can anyone tell me how to achieve this.
I have some code like this:
self send a message to me. self nextThing.
or
self send a message to me. A := self nextThing.
What naughty superpower code can I put in to #send that will jump execution to self nextThing directly?
send ... thisContext sender jump: 4
This skips 4 bytecodes in the calling method before returning, so instead of pc=31 it continues at pc=35:
29 <70> self 30 <D4> send: send 31 <D3> send: a 32 <D2> send: message 33 <D1> send: to 34 <D0> send: me 35 <87> pop 36 <70> self 37 <D5> send: nextThing 38 <87> pop 39 <78> returnSelf
- Bert -