GitLab

(mark_memory): Use it.
(SETJMP_WILL_LIKELY_WORK, SETJMP_WILL_NOT_WORK): New macros.
(setjmp_tested_p, longjmp_done): New variables.
(test_setjmp): New function.
(mark_stack) [!GC_SETJMP_WORKS]: Call test_setjmp.
(init_alloc): Initialize setjmp_tested_p and longjmp_done.