debugging technique

debugging-techniques.txt

@@ -2,4 +2,74 @@ DEBUGGING TECHNIQUES:
 ---------------------
 
 
+->  Delta Debugging:
+    ++++++++++++++++ 
+
+
+    It is a technique like binary search, where we can decrease the section
+    under analysis to find bugs.
+
+    Like, we can use multiple breakpoints to the program and see 
+    where the program faces issue and when it faces. It could
+    face the issue before some breakpoint could be reached or
+    after some breakpoints are encountered.
+    This way we can reduce our search space and section of analysis.
+
+
+-> Assertion:
+   ++++++++++ 
+
+
+   assert():    It check if the assumption which is passed
+                as an argument is true. If it isn't, the 
+                program will Abort and core dumped.
+
+                This is for runtime check and the program
+                is part of C library.
+
+                To use it we need #include <cassert> statement
+                in C++ program.
+
+   static_assert(): It check the assumption at compile time
+                    and throw compilation error if the 
+                    assertion fails.
+
+
+                    This is helpful where we can evaluate
+                    variable as constant expression using
+                    constexpr keywords, which could help
+                    in static assertion failure.
+
+
+-> Investigating Code by Calling functions within GDB:
+   +++++++++++++++++++++++++++++++++++++++++++++++++++  
+
+
+   * We can call a function from GDB when haven't reached
+     the point where we execute the function.
+
+     We can do function call from GDB itself.
+
+     We can use...
+
+     Command:
+     (gdb)call <function-name>( <arguments>.... )
+
+
+-> Attaching the Debugger to a Running Process:
+   ++++++++++++++++++++++++++++++++++++++++++++
+
+   To attach a running to process to a gdb.
+
+   Command:
+   $gdb -p <process-id>
+
+    We can get the process id using below command:
+        
+        $ps aux | grep <process-name>
+
+    To Detach a process and let it run, we can use
+    command:
+    (gdb)detach
+