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Thu, 23 Feb 2023 23:11:43 +0000 (GMT) From: Ilya Leoshkevich To: =?utf-8?q?Alex_Benn=C3=A9e?= , Laurent Vivier Cc: qemu-devel@nongnu.org, Christian Borntraeger , Ilya Leoshkevich , Richard Henderson Subject: [PATCH v2 2/2] tests/tcg/linux-test: Add linux-fork-trap test Date: Fri, 24 Feb 2023 00:11:37 +0100 Message-Id: <20230223231137.186344-3-iii@linux.ibm.com> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230223231137.186344-1-iii@linux.ibm.com> References: <20230223231137.186344-1-iii@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: UcR6C393HJU8stDhVAxmMAzKgRvzKFMR X-Proofpoint-GUID: UcR6C393HJU8stDhVAxmMAzKgRvzKFMR X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.930,Hydra:6.0.562,FMLib:17.11.170.22 definitions=2023-02-23_13,2023-02-23_01,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 clxscore=1015 phishscore=0 bulkscore=0 spamscore=0 malwarescore=0 impostorscore=0 priorityscore=1501 mlxscore=0 mlxlogscore=978 adultscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2302230192 Received-SPF: pass client-ip=148.163.156.1; envelope-from=iii@linux.ibm.com; helo=mx0a-001b2d01.pphosted.com X-Spam_score_int: -19 X-Spam_score: -2.0 X-Spam_bar: -- X-Spam_report: (-2.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Check that dying due to a signal does not deadlock. Reviewed-by: Richard Henderson Reviewed-by: Alex Bennée Signed-off-by: Ilya Leoshkevich --- tests/tcg/multiarch/linux/linux-fork-trap.c | 51 +++++++++++++++++++++ 1 file changed, 51 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..2bfef800c3e --- /dev/null +++ b/tests/tcg/multiarch/linux/linux-fork-trap.c @@ -0,0 +1,51 @@ +/* + * Test that a fork()ed process terminates after __builtin_trap(). + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ +#include +#include +#include +#include +#include +#include + +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. + */ + printf("about to trigger fault...\n"); +#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)); + printf("faulting thread exited cleanly\n"); + + return EXIT_SUCCESS; +}