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Debugging a Delphi – Format and Pointers/Hex Values (Memory Overwrite) – Stack Overflow

Posted by jpluimers on 2021/01/12

A long time ago (Delphi XE2 era), David Dubois and I helped out Doug find either the cause or a workaround of a memory overwrite in a 32-bit application.

The problem was that a call to Format for a pointe or hex value would give corrupt results, but with a regular integer value it would succeed.

Doug created an example [WayBack] overwriting some memory to simulate the problem.

I provided some steps [WayBack] to help trace such cases down.

In the and a rebuild – first withut madExcept, later with madExcept turned on again – solved the problem.

Likely this was the Delphi IDE becoming corrupt, something which I have seen intermittently over the last two decades.

Be sure to read both answers at [WayBack] delphi – Format and Pointers/Hex Values (Memory Overwrite) – Stack Overflow


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