This attribute asserts that a call to a function never results in a C++ exception being sent from the callee to the caller.
The Arm® library headers
automatically add this qualifier to declarations of C functions that, according to
the ISO C Standard, can never throw an exception. However, there are some
restrictions on the unwinding tables produced for the C library functions that might
throw an exception in a C++ context, for example, bsearch and qsort.
If the compiler knows that a function can never throw an exception, it might be able to
generate smaller exception-handling tables for callers of that function.
Arm’s Privacy Policy has been updated. By continuing to use our site, you consent to Arm’s Privacy Policy. Please review our Privacy Policy to learn more about our collection, use and transfers of your data.