CODEWITHSUNDEEP
cgcc
HSchmale
HSchmale

Reputation: 1929

Tell C to inline function but still have it available to call debugger

Is there anyway to mark a function as inline, but still have at available to call at the debugger? All of my functions I would like to call are marked as static inline, because we are only allowed to expose certain functions in our file. I'm using gcc.

Upvotes: 0

Views: 383

Answers (3)

Clifford
Clifford

Reputation: 93476

In-lined functions have no return instruction, so even if you had the address of the start of the in-lined function, calling it from the debugger would execute the code that follows the in-lining, of which it would almost certainly not have a suitable stack frame.

It is not usual, and certainly not easy do debug optimised code in any case. Normally one would simply switch optimisation off for debugging - in GCC at least, the inline keyword is ignored at -O0.

Upvotes: 1

Matthieu Brucher
Matthieu Brucher

Reputation: 22023

This is one of the issues when optimizing the code. You need to lower the optimizations a little bit (Usual recommendations in CMake for instance is to use -O2 instead of -O3) and add -fno-omit-frame-pointer to the command line (it will make code slower, as it allocates a register to keep track on the stack frame pointer during function calls).

On compilers like ICC, you can have even more debug info by using -debug all.

Upvotes: 0

Swordfish
Swordfish

Reputation: 13134

-ginline-points could help:

Generate extended debug information for inlined functions. Location view tracking markers are inserted at inlined entry points, so that address and view numbers can be computed and output in debug information. This can be enabled independently of location views, in which case the view numbers won’t be output, but it can only be enabled along with statement frontiers, and it is only enabled by default if location views are enabled.

Upvotes: 1

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