1 /* 2 * Copyright (c) 2021 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28 29 #include <darwintest.h> 30 #include <stdio.h> 31 #include <stdlib.h> 32 #include <unistd.h> 33 #include <signal.h> 34 #include <string.h> 35 #include <errno.h> 36 #include <sys/types.h> 37 #include <sys/ptrace.h> 38 39 T_GLOBAL_META( 40 T_META_NAMESPACE("xnu.spawn"), 41 T_META_RADAR_COMPONENT_NAME("xnu"), 42 T_META_RADAR_COMPONENT_VERSION("spawn"), 43 T_META_OWNER("jainam_shah"), 44 T_META_RUN_CONCURRENTLY(true) 45 ); 46 47 T_DECL(test_ptraceme, "Test that ptraced process is stopped when it execs", T_META_ASROOT(true), T_META_ENABLED(TARGET_OS_OSX), T_META_TAG_VM_PREFERRED) 48 { 49 int ret; 50 51 T_LOG("Parent %d: Calling fork()", getpid()); 52 pid_t child_pid = fork(); 53 if (child_pid == -1) { 54 T_FAIL("Fork failed with error: %d: %s", errno, strerror(errno)); 55 } else if (child_pid == 0) { 56 /* Child */ 57 T_LOG("Child %d: Calling ptrace(PT_TRACE_ME, 0, NULL, 0)", getpid()); 58 ret = ptrace(PT_TRACE_ME, 0, NULL, 0); 59 T_EXPECT_POSIX_SUCCESS(ret, "ptrace PT_TRACE_ME"); 60 61 T_LOG("Child %d: Calling execl(\"/bin/echo\", ...)", getpid()); 62 execl("/bin/echo", "echo", "/bin/echo executed - this should not happen before parent has detached!", NULL); 63 T_FAIL("execl failed with error: %d: %s", errno, strerror(errno)); 64 } else { 65 /* Parent */ 66 T_LOG("Parent %d: Calling waitpid(%d, NULL, WUNTRACED)", getpid(), child_pid); 67 int child_status = 0; 68 69 ret = waitpid(child_pid, &child_status, WUNTRACED); 70 T_EXPECT_EQ(ret, child_pid, "Waitpid returned status for child pid"); 71 72 T_EXPECT_TRUE(WIFSTOPPED(child_status), 73 "Parent %d: waitpid() indicates that child %d is now stopped for tracing", getpid(), child_pid); 74 75 T_LOG("Parent %d: Calling ptrace(PT_DETACH, %d, NULL, 0)", getpid(), child_pid); 76 ret = ptrace(PT_DETACH, child_pid, NULL, 0); 77 T_EXPECT_POSIX_SUCCESS(ret, "ptrace PT_DETACH"); 78 79 T_LOG("Parent %d: Calling kill(%d, SIGTERM)", getpid(), child_pid); 80 kill(child_pid, SIGTERM); 81 82 T_LOG("Parent %d: Calling wait(NULL)\n", getpid()); 83 wait(NULL); 84 85 T_END; 86 } 87 } 88