Unleash the power of Delphi debugger

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Presentation transcript:

Unleash the power of Delphi debugger Primož Gabrijelčič

About me Pascal programmer since 1984 (HiSoft pascal on ZX Spectrum) First contact with Borland: Turbo Pascal 3 (on CP/M) Programming highly responsive 24/7 applications since 1997 Writer: The Delphi Magazine, Blaise Pascal, Monitor (Slovenia) Blogger: http://thedelphigeek.com Contact me: http://primoz.gabrijelcic.org

Debugging

Basics F9 Run with debugging Shift+Ctrl+F9 Run without debugging Ctrl+F2 Program reset F4 Run to current position F8 Step over F7 Trace into Shift+F7 Trace to next source line Shift+F8 Run until return F5 Toggle breakpoint Shift+F5 Enable/disable breakpoint

Settings / Project Options Project, Options, Delphi Compiler, Compiling Optimization Debug information Use debug .dcu‘s Selective Debugging Expert by Uwe Raabe http://www.uweraabe.de/Blog/2015/05/08/selective-debugging/ Delphi Compiler, Linking Include Remote Debug symbols

Settings / IDE Options Tools, Options, Debugger Options F1! General Event log F1!

Breakpoints

Properties: Enabled Enabled Shift-F5

Properties: Condition slow code DebugBreak(condition) https://github.com/gabr42/GpDelphiUnits

Properties: Pass count slow Narrowing down reproducible problems

Side effects: Break Break

Side effects: Log message

Side effects: Eval expression OutputDebugString Loggers (CodeSite …) Log to console GpConsole

Side effects: Log call stack Full Partial

Groups Group Enable group Disable group manual toggle

Threads Properties, Thread Freeze all other threads Thaw all threads

Exceptions Tools, Options Ignore subsequent exceptions Debugger Options Embarcadero Debuggers Language Exceptions Ignore subsequent exceptions Handle subsequent exceptions ExceptionClass

Hardware breakpoints Address Data Limited number Code execution Can be set on read-only memory Data Data access Limited number DR0 … DR3 Disabled on program restart

Tips and tricks [1] Run until return Moving a breakpoint with mouse Options, Line number Moving execution point Set next statement “repeat last statement”

Tips and tricks [2] Call stack breakpoints DLL import breakpoints Disable/enable all

Debugging remotely

Remote debugger Platform Assistant [PAServer] Remote Debugger [rmtdbgXXX.exe] Firewall! Ubuntu demo

Evaluate & Watch

Evaluating expressions Ctrl+F5 Add watch Ctrl+F7 Evaluate/Modify Alt+F5, Ctrl+Shift+click Inspect

Evaluate / Watch Ctrl+F5 Add watch Ctrl+F7 Evaluate/Modify Alt+F5, Ctrl+Shift+click Inspect

Optimizer DontOptimize procedure DontOptimize(var data); begin // do nothing end; GpStuff A A,x A,r a.Signature a.Signature^ a.Signature^,20 PChar(a.Signature)^ PChar(a.Signature)^,20 string(a.Signature)

Q & A