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How to let GDB not warn xxx has unknown return type; cast . . . In a cooperative project I notice that running some commands such as call malloc (sizeof (std::string)) my GDB warns 'malloc' has unknown return type; cast the call to its declared return type and
GDB Tips and Tricks #6: Examining Data Types - ShaneKirk. com You can turn to the source code to seek this out If the type turns out to be a struct class, typedef, or type alias, you might need to do a bit more spelunking to fully understand what kind of data is in play Fortunately, gdb provides us with a couple of commands to help us out when it comes to data types – whatis and ptype whatis
Variables (Debugging with GDB) - sourceware. org See unknown type, for more about unknown types If you cast the variable to its declared type, GDB gets the variable’s value using the cast-to type as the variable’s type
NASM DWARF Debugging Issue with gdb - Ask Ubuntu I'm encountering an issue while debugging NASM assembly code using gdb The error message I receive is: (gdb) print num 'num' has unknown type; cast it to its declared type (gdb) print num
How to Show Typeinfo (Real Type of `this`) in GDB Without . . . When debugging C++ code—especially with polymorphism—understanding the **real (dynamic) type** of the `this` pointer is often critical Consider a scenario where a base class pointer (`Base*`) points to a derived class object (`Derived`) While the static type of `this` is `Base*`, its dynamic type is `Derived*` However, GDB’s default inspection of `this` typically only shows the static