1*9d12795fSRobert Mustacchi /* 2*9d12795fSRobert Mustacchi * This file and its contents are supplied under the terms of the 3*9d12795fSRobert Mustacchi * Common Development and Distribution License ("CDDL"), version 1.0. 4*9d12795fSRobert Mustacchi * You may only use this file in accordance with the terms of version 5*9d12795fSRobert Mustacchi * 1.0 of the CDDL. 6*9d12795fSRobert Mustacchi * 7*9d12795fSRobert Mustacchi * A full copy of the text of the CDDL should have accompanied this 8*9d12795fSRobert Mustacchi * source. A copy of the CDDL is also available via the Internet at 9*9d12795fSRobert Mustacchi * http://www.illumos.org/license/CDDL. 10*9d12795fSRobert Mustacchi */ 11*9d12795fSRobert Mustacchi 12*9d12795fSRobert Mustacchi /* 13*9d12795fSRobert Mustacchi * Copyright (c) 2015, Joyent, Inc. 14*9d12795fSRobert Mustacchi */ 15*9d12795fSRobert Mustacchi 16*9d12795fSRobert Mustacchi /* 17*9d12795fSRobert Mustacchi * Verify that using MC_INHERIT_ZERO doesn't work on mappings that aren't 18*9d12795fSRobert Mustacchi * anonymous private mappings. 19*9d12795fSRobert Mustacchi */ 20*9d12795fSRobert Mustacchi 21*9d12795fSRobert Mustacchi #include <sys/types.h> 22*9d12795fSRobert Mustacchi #include <unistd.h> 23*9d12795fSRobert Mustacchi #include <assert.h> 24*9d12795fSRobert Mustacchi #include <sys/mman.h> 25*9d12795fSRobert Mustacchi #include <string.h> 26*9d12795fSRobert Mustacchi #include <errno.h> 27*9d12795fSRobert Mustacchi #include <stdlib.h> 28*9d12795fSRobert Mustacchi #include <wait.h> 29*9d12795fSRobert Mustacchi #include <sys/stat.h> 30*9d12795fSRobert Mustacchi #include <fcntl.h> 31*9d12795fSRobert Mustacchi 32*9d12795fSRobert Mustacchi int 33*9d12795fSRobert Mustacchi main(void) 34*9d12795fSRobert Mustacchi { 35*9d12795fSRobert Mustacchi void *buf; 36*9d12795fSRobert Mustacchi int ret, fd; 37*9d12795fSRobert Mustacchi char *template = "/tmp/inz_inval.XXXXXX"; 38*9d12795fSRobert Mustacchi char *tmpfile; 39*9d12795fSRobert Mustacchi size_t mapsz = sysconf(_SC_PAGESIZE) * 2; 40*9d12795fSRobert Mustacchi caddr_t bad = (caddr_t)(uintptr_t)23; 41*9d12795fSRobert Mustacchi 42*9d12795fSRobert Mustacchi buf = mmap(NULL, mapsz, PROT_READ | PROT_WRITE, 43*9d12795fSRobert Mustacchi MAP_PRIVATE | MAP_ANON, -1, 0); 44*9d12795fSRobert Mustacchi assert(buf != MAP_FAILED); 45*9d12795fSRobert Mustacchi 46*9d12795fSRobert Mustacchi /* Bad arguments to memcntl */ 47*9d12795fSRobert Mustacchi ret = memcntl(buf, mapsz, MC_INHERIT_ZERO, bad, 0, 0); 48*9d12795fSRobert Mustacchi assert(ret == -1); 49*9d12795fSRobert Mustacchi assert(errno == EINVAL); 50*9d12795fSRobert Mustacchi 51*9d12795fSRobert Mustacchi ret = memcntl(buf, mapsz, MC_INHERIT_ZERO, 0, PROT_READ, 0); 52*9d12795fSRobert Mustacchi assert(ret == -1); 53*9d12795fSRobert Mustacchi assert(errno == EINVAL); 54*9d12795fSRobert Mustacchi 55*9d12795fSRobert Mustacchi ret = memcntl(buf, mapsz, MC_INHERIT_ZERO, bad, PROT_READ | PRIVATE, 0); 56*9d12795fSRobert Mustacchi assert(ret == -1); 57*9d12795fSRobert Mustacchi assert(errno == EINVAL); 58*9d12795fSRobert Mustacchi 59*9d12795fSRobert Mustacchi ret = memcntl(buf, mapsz, MC_INHERIT_ZERO, 0, 0, 1); 60*9d12795fSRobert Mustacchi assert(ret == -1); 61*9d12795fSRobert Mustacchi assert(errno == EINVAL); 62*9d12795fSRobert Mustacchi 63*9d12795fSRobert Mustacchi ret = munmap(buf, mapsz); 64*9d12795fSRobert Mustacchi assert(ret == 0); 65*9d12795fSRobert Mustacchi 66*9d12795fSRobert Mustacchi /* Mapping non-existant region */ 67*9d12795fSRobert Mustacchi ret = memcntl(buf, mapsz, MC_INHERIT_ZERO, 0, 0, 0); 68*9d12795fSRobert Mustacchi assert(ret == -1); 69*9d12795fSRobert Mustacchi assert(errno == ENOMEM); 70*9d12795fSRobert Mustacchi 71*9d12795fSRobert Mustacchi /* Map anon MAP_SHARED */ 72*9d12795fSRobert Mustacchi buf = mmap(NULL, mapsz, PROT_READ | PROT_WRITE, 73*9d12795fSRobert Mustacchi MAP_SHARED | MAP_ANON, -1, 0); 74*9d12795fSRobert Mustacchi assert(buf != MAP_FAILED); 75*9d12795fSRobert Mustacchi ret = memcntl(buf, mapsz, MC_INHERIT_ZERO, 0, 0, 0); 76*9d12795fSRobert Mustacchi assert(ret == -1); 77*9d12795fSRobert Mustacchi assert(errno == EINVAL); 78*9d12795fSRobert Mustacchi ret = munmap(buf, mapsz); 79*9d12795fSRobert Mustacchi assert(ret == 0); 80*9d12795fSRobert Mustacchi 81*9d12795fSRobert Mustacchi /* Grab a temp file and get it to be the right size */ 82*9d12795fSRobert Mustacchi tmpfile = strdup(template); 83*9d12795fSRobert Mustacchi assert(tmpfile != NULL); 84*9d12795fSRobert Mustacchi fd = mkstemp(tmpfile); 85*9d12795fSRobert Mustacchi assert(fd >= 0); 86*9d12795fSRobert Mustacchi ret = ftruncate(fd, mapsz); 87*9d12795fSRobert Mustacchi assert(ret == 0); 88*9d12795fSRobert Mustacchi 89*9d12795fSRobert Mustacchi /* MAP_PRIVATE file */ 90*9d12795fSRobert Mustacchi buf = mmap(NULL, mapsz, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0); 91*9d12795fSRobert Mustacchi assert(buf != MAP_FAILED); 92*9d12795fSRobert Mustacchi ret = memcntl(buf, mapsz, MC_INHERIT_ZERO, 0, 0, 0); 93*9d12795fSRobert Mustacchi assert(ret == -1); 94*9d12795fSRobert Mustacchi assert(errno == EINVAL); 95*9d12795fSRobert Mustacchi ret = munmap(buf, mapsz); 96*9d12795fSRobert Mustacchi assert(ret == 0); 97*9d12795fSRobert Mustacchi 98*9d12795fSRobert Mustacchi /* MAP_SHARED file */ 99*9d12795fSRobert Mustacchi buf = mmap(NULL, mapsz, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); 100*9d12795fSRobert Mustacchi assert(buf != MAP_FAILED); 101*9d12795fSRobert Mustacchi ret = memcntl(buf, mapsz, MC_INHERIT_ZERO, 0, 0, 0); 102*9d12795fSRobert Mustacchi assert(ret == -1); 103*9d12795fSRobert Mustacchi assert(errno == EINVAL); 104*9d12795fSRobert Mustacchi ret = munmap(buf, mapsz); 105*9d12795fSRobert Mustacchi assert(ret == 0); 106*9d12795fSRobert Mustacchi 107*9d12795fSRobert Mustacchi ret = close(fd); 108*9d12795fSRobert Mustacchi assert(ret == 0); 109*9d12795fSRobert Mustacchi (void) unlink(tmpfile); 110*9d12795fSRobert Mustacchi free(tmpfile); 111*9d12795fSRobert Mustacchi 112*9d12795fSRobert Mustacchi return (0); 113*9d12795fSRobert Mustacchi } 114