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

3 days ago · Without this info, GDB assumes it might be dangerous to execute, so it triggers that "unknown return type" warning. Instead of casting every time, the "clean" way to fix this is to make …

As you’d probably expect, gdb prints “int” when we ask about variable a’s type. When we ask for the type of variable b, we see “IntValueAlias”. You’ll note from the code snippet above that IntValueAlias …

See C and C ++, for more information about debug info formats that are best suited to C ++ programs. If you ask to print an object whose contents are unknown to GDB, e.g., because its data type is not …

Dec 12, 2025 · 7. Conclusion Incomplete type errors in GDB stem from missing type metadata in debug symbols. By understanding why these errors occur—GDB’s reliance on type layout information—you …

Jun 5, 2024 · Printing the value of errno when debugging with GDB should be easy, but sometimes it doesn't work. Learn why this can happen and what you can do about it.

Oct 26, 2021 · I'm a bot, bleep, bloop. Someone has linked to this thread from another place on reddit: [r/cprogramming] GDB Printing fixed point type If you follow any of the above links, please respect …

Oct 2, 2012 · $17 = <unknown type> When I print byte_size I get: Function return type unknown. I'm getting a seg fault on the asprint command so I'm trying to see the values of these two variables. I …