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https://github.com/Zenithsiz/ftmemsim-valgrind.git
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7407c16737
of an incompatible type to signal handler. Untyped function pointer sa_handler() is no longer available so we leverage sa_sigaction(int, siginfo_t *, void *) instead. n-i-bz git-svn-id: svn://svn.valgrind.org/valgrind/trunk@15858
45 lines
923 B
C
45 lines
923 B
C
/* Test that the stack correctly dies after a setcontext(2) call. */
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#include <assert.h>
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#include <signal.h>
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#include <stdio.h>
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#include <ucontext.h>
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static volatile int *sp;
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static void sighandler(int sig, siginfo_t *sip, void *arg)
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{
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ucontext_t *ucp = (ucontext_t *) arg;
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sp = (int *) &ucp->uc_mcontext.gregs[0];
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}
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int main(void)
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{
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struct sigaction sa;
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/* Always-null value that is used to prevent any possible compiler
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optimizations. */
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volatile int zero = 0;
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/* Setup a signal handler. */
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sa.sa_sigaction = sighandler;
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sa.sa_flags = SA_SIGINFO;
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if (sigfillset(&sa.sa_mask)) {
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perror("sigfillset");
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return 1;
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}
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if (sigaction(SIGUSR1, &sa, NULL)) {
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perror("sigaction");
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return 1;
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}
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/* Raise a signal. */
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raise(SIGUSR1);
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/* Value pointed by sp should be at this point uninitialized. */
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if (*sp && zero)
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assert(0);
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return 0;
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}
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