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(Fixed) AHK L x64 VarSetCapacity() problem

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Rseding91

Post subject: (Fixed) AHK L x64 VarSetCapacity() problem

Posted: August 17th, 2011, 7:40 am

Joined: June 7th, 2010, 3:40 pm
Posts: 553

I seem to have run into a undocumented limit in the x64 version of AHK L.

Code:

VarSetCapacity(Var1,2147483644,0) ;This works
VarSetCapacity(Var1,2147483645,0) ;This errors out

From the looks of it, variables are limited to 4 bytes under 2 GB (each) - leaving room for a null terminator (a 4 byte integer).

Was this meant to be? I sort of thought that a x64 build would support virtually unlimited sizes per variable.

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Lexikos

Post subject:

Posted: August 17th, 2011, 12:33 pm

Joined: October 17th, 2006, 4:15 pm
Posts: 7503
Location: Australia

Code:

if (   new_size > 2147483647 || !(new_mem = (char *)malloc(new_size))   ) // v1.0.44.10: Added a sanity limit of 2 GB so that small negatives like VarSetCapacity(Var, -2) [and perhaps other callers of this function] don't crash.

I'll fix it.

(Topic moved from Ask for Help to Bug Reports.)

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Lexikos

Post subject:

Posted: August 20th, 2011, 1:58 pm

Joined: October 17th, 2006, 4:15 pm
Posts: 7503
Location: Australia

Fixed in v1.1.02.02.

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