[Solved] Qt 5 stack memory limit?
I'm using Qt 5.1 32 bit for VS2012. My application has a class that gets instantaniated when I press a button on the main form. The class has large arrays. When I try to run the program, it crashes. When I decrease the array sizes by 10 to 1, for example, no problems. The large arrays are for data calculations, Here are the array sizes:
Will using the 64 bit Qt 5 solve my problem?
I have ported the same program from C# in Visual Studio 2013 compiled for 32 bit, and the code works fine there. I don't know why Qt would be different.
I'm using Windows 7 SP1 64 bit with 8 GB ram.
Any help would be appreciated. Thanks in advance.
This is a compiler settings and not a Qt specific issue. AFAIK this is fix for the application and cannot be solved by using a machine with more RAM. Going from 32 to 64 bit may have an influence but more as a side issue.
You do not give any details of what kind of variables you are using. Certainly you should use dynamic memory allocation with "new. ":http://www.cplusplus.com/reference/new/operator new/
I solved the problem by adding a line to my .pro file:
QMAKE_LFLAGS_WINDOWS += -Wl,--stack,32000000
for minGW 32 bit compiler
QMAKE_LFLAGS += /STACK:32000000
for msvc 32 bit compiler.
Runs lightening fast. Only adds 2 MB of memory in Task Manager.
Thanks for the replies.