/* BZ 12420 */ #include <errno.h> #include <fenv.h> #include <stdio.h> #include <stdlib.h> #include <ucontext.h> #include <libc-diag.h> static int do_test (void) { if (FE_ALL_EXCEPT == 0) { printf("Skipping test; no support for FP exceptions.\n"); return 0; } int except_mask = 0; #ifdef FE_DIVBYZERO except_mask |= FE_DIVBYZERO; #endif #ifdef FE_INVALID except_mask |= FE_INVALID; #endif #ifdef FE_OVERFLOW except_mask |= FE_OVERFLOW; #endif #ifdef FE_UNDERFLOW except_mask |= FE_UNDERFLOW; #endif int status = feenableexcept (except_mask); except_mask = fegetexcept (); if (except_mask == -1) { printf("\nBefore getcontext(): fegetexcept returned: %d\n", except_mask); return 1; } ucontext_t ctx; status = getcontext(&ctx); if (status) { printf("\ngetcontext failed, errno: %d.\n", errno); return 1; } printf ("\nDone with getcontext()!\n"); fflush (NULL); /* On nios2 GCC 5 warns that except_mask may be used uninitialized. Because it is always initialized and nothing in this test ever calls setcontext (a setcontext call could result in local variables being clobbered on the second return from getcontext), in fact an uninitialized use is not possible. */ DIAG_PUSH_NEEDS_COMMENT; DIAG_IGNORE_NEEDS_COMMENT (5, "-Wmaybe-uninitialized"); int mask = fegetexcept (); if (mask != except_mask) { printf("\nAfter getcontext(): fegetexcept returned: %d, expected: %d.\n", mask, except_mask); return 1; } printf("\nAt end fegetexcept() returned %d, expected: %d.\n", mask, except_mask); DIAG_POP_NEEDS_COMMENT; return 0; } #define TEST_FUNCTION do_test () #include "../test-skeleton.c"