SQUEAK_SPY environment variable

 

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Does anybody know what the -spy option or the variable SQUEAK_SPY is doing ?

platforms/unix/vm-display-X11/sqUnixX11.c:int withSpy= 0;
platforms/unix/vm-display-X11/sqUnixX11.c:  if (getenv("SQUEAK_SPY")) withSpy= 1;
platforms/unix/vm/sqUnixMain.c:       int    withSpy= 0;
platforms/unix/vm/sqUnixMain.c:  else if (!strcmp(argv[0], VMOPTION("spy")))       { withSpy = 1; return 1; }

Also I wonder why both .c files (sqUnixX11.c and sqUnixMain.c) both define
the same global variable (they both define withSpy).

I'd expect one of them to define it, and the other declare it extern.
But I don't immediately see where 'withSpy' is used.

David Stes

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When I set the variable,

$ export SQUEAK_SPY=1
$ /usr/bin/squeak Squeak5.3-19431-64bit.image

It seems to have no effect, but maybe I'm mistaken.

There's a description

./unix/vm/sqUnixMain.c:      printf("  "VMOPTION("spy")"                  enable the system spy\n");

But what is the effect precisely of 'enabling the system spy" ??

Thanks!
David Stes

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Maybe the VM -spy option is somehow related to spyOn: and MessageTally ??

http://wiki.squeak.org/squeak/4210

It's just a guess.
I don't immediately see any documentation on this on wiki.squeak.org.

Perhaps -spy is related to Squeak Performance Tuning ?

David Stes

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