Madexceptbpl Top __hot__

The "Top" address is the end of the memory segment allocated to that BPL. Delphi packages are tricky. Unlike standard DLLs, BPLs are designed to share the same memory manager, classes, and RTTI (Run-Time Type Information) as the host executable. When a crash occurs inside a loaded package, madExcept must determine if the crash address falls within the boundaries of a loaded BPL.

[DebugInfo] ; Force madExcept to treat any address within 4096 bytes of the top as "inside" NearTopTolerance=4096 ; Required for BPLs loaded with SetParent/UnloadPackage IgnoreDynamicallyUnloadedBPLs=false ; Explicitly set top for a specific BPL (emergency override) ExplicitBPLBoundary=MyLegacyBPL.bpl, 0x400000-0x420000 Note: The ExplicitBPLBoundary setting is undocumented but supported in madExcept 5.1.2 and later. The keyword madexceptbpl top might seem like an esoteric piece of debug data, but it is actually a window into the health of your Delphi application's runtime structure. When madExcept reports this value, it is telling you exactly which module had control of the CPU when everything went wrong. madexceptbpl top

If the address is $12400001 , that is one byte above the defined top . This immediately tells you that the BPL jumped its memory fence—a clear sign of corruption or a multi-threading race condition. Sometimes, madExcept will display a call stack with [UNKNOWN] symbols, followed by the note: Stack range outside madexceptbpl top - tracing halted. The "Top" address is the end of the

In the high-stakes world of Delphi application development, stability isn't just a feature—it's a requirement. When your application crashes in production, you need answers fast. You need to know exactly where the call stack failed, what the memory state was, and which thread caused the havoc. Enter madExcept , the gold standard for exception handling and bug reporting. When a crash occurs inside a loaded package,

[module name] 0x[Start Address] - 0x[End Address] (madexceptbpl top)

This means the stack walker attempted to trace execution into a memory region not owned by any known module. This often happens with dynamically generated code (e.g., a just-in-time compiler inside a BPL) or when a BPL was unloaded prematurely. If you manually edit your project's .mes file, you might see: