Check that dying due to a signal does not deadlock. Signed-off-by: Ilya Leoshkevich <i...@linux.ibm.com> Reviewed-by: Richard Henderson <richard.hender...@linaro.org> --- tests/tcg/multiarch/linux/linux-fork-trap.c | 48 +++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 tests/tcg/multiarch/linux/linux-fork-trap.c
diff --git a/tests/tcg/multiarch/linux/linux-fork-trap.c b/tests/tcg/multiarch/linux/linux-fork-trap.c new file mode 100644 index 00000000000..a921f875380 --- /dev/null +++ b/tests/tcg/multiarch/linux/linux-fork-trap.c @@ -0,0 +1,48 @@ +/* + * Test that a fork()ed process terminates after __builtin_trap(). + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ +#include <assert.h> +#include <stdlib.h> +#include <sys/resource.h> +#include <sys/wait.h> +#include <unistd.h> + +int main(void) +{ + struct rlimit nodump; + pid_t err, pid; + int wstatus; + + pid = fork(); + assert(pid != -1); + if (pid == 0) { + /* We are about to crash on purpose; disable core dumps. */ + if (getrlimit(RLIMIT_CORE, &nodump)) { + return EXIT_FAILURE; + } + nodump.rlim_cur = 0; + if (setrlimit(RLIMIT_CORE, &nodump)) { + return EXIT_FAILURE; + } + /* + * An alternative would be to dereference a NULL pointer, but that + * would be an UB in C. + */ +#if defined(__MICROBLAZE__) + /* + * gcc emits "bri 0", which is an endless loop. + * Take glibc's ABORT_INSTRUCTION. + */ + asm volatile("brki r0,-1"); +#else + __builtin_trap(); +#endif + } + err = waitpid(pid, &wstatus, 0); + assert(err == pid); + assert(WIFSIGNALED(wstatus)); + + return EXIT_SUCCESS; +} -- 2.39.1