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[DrTip]

I am sorry if this documented somewhere

We are have downloaded 4.9x to evaluate using the 3GB switch with some legacy code. This code uses lots of large common block arrays which for the purposes of the current project have grown significantly over previous projects, hence the investigation of the 3GB switch.

We are compiling to WIN32 using the slink 3GB switch on an Athlon 64bit running XP x64. Everything seems to be going well with regard to memory usage, however when things fail due to coding errors eg overflow, underflow etc the code just stops. Since we are on a 12 hour run time this is making debugging very difficult.

From these user groups I understand that there is no possibility of compiling to debug mode but it this true? At the moment we are having to put debug lines into the code to print to a log file where abouts in the code we are. This is obviously not very efficient.

Is there any way of using SDBG or Visual Studio with this 3GB option?


Carl

[PaulLaidler]

Carl

SLINK has the command 3GB that creates an application with a 3GB address space when using debugging options (otherwise this is the default). You must be using Windows XP or a similar operating system that implements the /3GB switch in the boot.ini.

A problem might arise if you include /UNDEF in the compiler options because the "addresses" used to represent undefined values lie in the range above 2GB. However, the chances of hitting one of these values is very small.

[DrTip]

Thanks Paul that will be a great help

Carl