From e02cda008591317b1625707ff8e115a4841aa889 Mon Sep 17 00:00:00 2001 From: Timos Ampelikiotis Date: Tue, 10 Oct 2023 11:40:56 +0000 Subject: Introduce Virtio-loopback epsilon release: Epsilon release introduces a new compatibility layer which make virtio-loopback design to work with QEMU and rust-vmm vhost-user backend without require any changes. Signed-off-by: Timos Ampelikiotis Change-Id: I52e57563e08a7d0bdc002f8e928ee61ba0c53dd9 --- tests/qtest/fuzz/fork_fuzz.c | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 tests/qtest/fuzz/fork_fuzz.c (limited to 'tests/qtest/fuzz/fork_fuzz.c') diff --git a/tests/qtest/fuzz/fork_fuzz.c b/tests/qtest/fuzz/fork_fuzz.c new file mode 100644 index 000000000..6ffb2a793 --- /dev/null +++ b/tests/qtest/fuzz/fork_fuzz.c @@ -0,0 +1,41 @@ +/* + * Fork-based fuzzing helpers + * + * Copyright Red Hat Inc., 2019 + * + * Authors: + * Alexander Bulekov + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + * + */ + +#include "qemu/osdep.h" +#include "fork_fuzz.h" + + +void counter_shm_init(void) +{ + /* Copy what's in the counter region to a temporary buffer.. */ + void *copy = malloc(&__FUZZ_COUNTERS_END - &__FUZZ_COUNTERS_START); + memcpy(copy, + &__FUZZ_COUNTERS_START, + &__FUZZ_COUNTERS_END - &__FUZZ_COUNTERS_START); + + /* Map a shared region over the counter region */ + if (mmap(&__FUZZ_COUNTERS_START, + &__FUZZ_COUNTERS_END - &__FUZZ_COUNTERS_START, + PROT_READ | PROT_WRITE, MAP_SHARED | MAP_FIXED | MAP_ANONYMOUS, + 0, 0) == MAP_FAILED) { + perror("Error: "); + exit(1); + } + + /* Copy the original data back to the counter-region */ + memcpy(&__FUZZ_COUNTERS_START, copy, + &__FUZZ_COUNTERS_END - &__FUZZ_COUNTERS_START); + free(copy); +} + + -- cgit