size_t
dump_vm_map_entry(kvm_t *kd, struct kbit *vmspace,
    struct vm_map_entry *vme, struct sum *sum)
{
	struct kbit kbit[4], *uvm_obj, *vp, *vfs, *amap;
	ino_t inode = 0;
	dev_t dev = 0;
	size_t sz = 0;
	char *name;

	uvm_obj = &kbit[0];
	vp = &kbit[1];
	vfs = &kbit[2];
	amap = &kbit[3];

	A(uvm_obj) = 0;
	A(vp) = 0;
	A(vfs) = 0;

	if (debug & PRINT_VM_MAP_ENTRY) {
		printf("%s = {", "vm_map_entry");
		printf(" start = %lx,", vme->start);
		printf(" end = %lx,", vme->end);
		printf(" object.uvm_obj/sub_map = %p,\n", vme->object.uvm_obj);
		printf("    offset = %lx,", (unsigned long)vme->offset);
		printf(" etype = %x <%s%s%s%s%s >,", vme->etype,
		    vme->etype & UVM_ET_OBJ ? " OBJ" : "",
		    vme->etype & UVM_ET_SUBMAP ? " SUBMAP" : "",
		    vme->etype & UVM_ET_COPYONWRITE ? " COW" : "",
		    vme->etype & UVM_ET_NEEDSCOPY ? " NEEDSCOPY" : "",
		    vme->etype & UVM_ET_HOLE ? " HOLE" : "");
		printf(" protection = %x,\n", vme->protection);
		printf("    max_protection = %x,", vme->max_protection);
		printf(" inheritance = %d,", vme->inheritance);
		printf(" wired_count = %d,\n", vme->wired_count);
		printf("    aref = <struct vm_aref>,");
		printf(" advice = %d,", vme->advice);
		printf(" flags = %x <%s%s > }\n", vme->flags,
		    vme->flags & UVM_MAP_STATIC ? " STATIC" : "",
		    vme->flags & UVM_MAP_KMEM ? " KMEM" : "");
	}

	A(vp) = 0;
	A(uvm_obj) = 0;

	if (vme->object.uvm_obj != NULL) {
		P(uvm_obj) = vme->object.uvm_obj;
		S(uvm_obj) = sizeof(struct uvm_object);
		KDEREF(kd, uvm_obj);
		if (UVM_ET_ISOBJ(vme) &&
		    UVM_OBJ_IS_VNODE(D(uvm_obj, uvm_object))) {
			P(vp) = P(uvm_obj);
			S(vp) = sizeof(struct vnode);
			KDEREF(kd, vp);
		}
	}

	if (vme->aref.ar_amap != NULL) {
		P(amap) = vme->aref.ar_amap;
		S(amap) = sizeof(struct vm_amap);
		KDEREF(kd, amap);
	}

	A(vfs) = 0;

	if (P(vp) != NULL && D(vp, vnode)->v_mount != NULL) {
		P(vfs) = D(vp, vnode)->v_mount;
		S(vfs) = sizeof(struct mount);
		KDEREF(kd, vfs);
		D(vp, vnode)->v_mount = D(vfs, mount);
	}

	/*
	 * dig out the device number and inode number from certain
	 * file system types.
	 */
#define V_DATA_IS(vp, type, d, i) do { \
	struct kbit data; \
	P(&data) = D(vp, vnode)->v_data; \
	S(&data) = sizeof(*D(&data, type)); \
	KDEREF(kd, &data); \
	dev = D(&data, type)->d; \
	inode = D(&data, type)->i; \
} while (0/*CONSTCOND*/)

	if (A(vp) &&
	    D(vp, vnode)->v_type == VREG &&
	    D(vp, vnode)->v_data != NULL) {
		switch (D(vp, vnode)->v_tag) {
		case VT_UFS:
		case VT_EXT2FS:
			V_DATA_IS(vp, inode, i_dev, i_number);
			break;
		case VT_ISOFS:
			V_DATA_IS(vp, iso_node, i_dev, i_number);
			break;
		case VT_NON:
		case VT_NFS:
		case VT_MFS:
		case VT_MSDOSFS:
		case VT_PROCFS:
		default:
			break;
		}
	}

	name = findname(kd, vmspace, vme, vp, vfs, uvm_obj);

	if (print_map) {
		printf("0x%lx 0x%lx %c%c%c %c%c%c %s %s %d %d %d",
		    vme->start, vme->end,
		    (vme->protection & VM_PROT_READ) ? 'r' : '-',
		    (vme->protection & VM_PROT_WRITE) ? 'w' : '-',
		    (vme->protection & VM_PROT_EXECUTE) ? 'x' : '-',
		    (vme->max_protection & VM_PROT_READ) ? 'r' : '-',
		    (vme->max_protection & VM_PROT_WRITE) ? 'w' : '-',
		    (vme->max_protection & VM_PROT_EXECUTE) ? 'x' : '-',
		    (vme->etype & UVM_ET_COPYONWRITE) ? "COW" : "NCOW",
		    (vme->etype & UVM_ET_NEEDSCOPY) ? "NC" : "NNC",
		    vme->inheritance, vme->wired_count,
		    vme->advice);
		if (verbose) {
			if (inode)
				printf(" %d,%d %llu",
				    major(dev), minor(dev),
				    (unsigned long long)inode);
			if (name[0])
				printf(" %s", name);
		}
		printf("\n");
	}

	if (print_maps)
		printf("%0*lx-%0*lx %c%c%c%c %0*lx %02x:%02x %llu     %s\n",
		    (int)sizeof(void *) * 2, vme->start,
		    (int)sizeof(void *) * 2, vme->end,
		    (vme->protection & VM_PROT_READ) ? 'r' : '-',
		    (vme->protection & VM_PROT_WRITE) ? 'w' : '-',
		    (vme->protection & VM_PROT_EXECUTE) ? 'x' : '-',
		    (vme->etype & UVM_ET_COPYONWRITE) ? 'p' : 's',
		    (int)sizeof(void *) * 2,
		    (unsigned long)vme->offset,
		    major(dev), minor(dev), (unsigned long long)inode,
		    inode ? name : "");

	if (print_ddb) {
		printf(" - <lost address>: 0x%lx->0x%lx: "
		    "obj=%p/0x%lx, amap=%p/%d\n",
		    vme->start, vme->end,
		    vme->object.uvm_obj, (unsigned long)vme->offset,
		    vme->aref.ar_amap, vme->aref.ar_pageoff);
		printf("\tsubmap=%c, cow=%c, nc=%c, prot(max)=%d/%d, inh=%d, "
		    "wc=%d, adv=%d\n",
		    (vme->etype & UVM_ET_SUBMAP) ? 'T' : 'F',
		    (vme->etype & UVM_ET_COPYONWRITE) ? 'T' : 'F',
		    (vme->etype & UVM_ET_NEEDSCOPY) ? 'T' : 'F',
		    vme->protection, vme->max_protection,
		    vme->inheritance, vme->wired_count, vme->advice);
		if (inode && verbose)
			printf("\t(dev=%d,%d ino=%llu [%s] [%p])\n",
			    major(dev), minor(dev), (unsigned long long)inode,
			    inode ? name : "", P(vp));
		else if (name[0] == ' ' && verbose)
			printf("\t(%s)\n", &name[2]);
	}

	if (print_solaris) {
		char prot[30];

		prot[0] = '\0';
		prot[1] = '\0';
		if (vme->protection & VM_PROT_READ)
			strlcat(prot, "/read", sizeof(prot));
		if (vme->protection & VM_PROT_WRITE)
			strlcat(prot, "/write", sizeof(prot));
		if (vme->protection & VM_PROT_EXECUTE)
			strlcat(prot, "/exec", sizeof(prot));

		sz = (size_t)((vme->end - vme->start) / 1024);
		printf("%0*lX %6luK %-15s   %s\n",
		    (int)sizeof(void *) * 2, (unsigned long)vme->start,
		    (unsigned long)sz, &prot[1], name);
	}

	if (print_all) {
		sz = (size_t)((vme->end - vme->start) / 1024);
		printf("%0*lx-%0*lx %7luk %0*lx %c%c%c%c%c (%c%c%c) %d/%d/%d %02d:%02d %7llu - %s",
		    (int)sizeof(void *) * 2, vme->start, (int)sizeof(void *) * 2,
		    vme->end - (vme->start != vme->end ? 1 : 0), (unsigned long)sz,
		    (int)sizeof(void *) * 2, (unsigned long)vme->offset,
		    (vme->protection & VM_PROT_READ) ? 'r' : '-',
		    (vme->protection & VM_PROT_WRITE) ? 'w' : '-',
		    (vme->protection & VM_PROT_EXECUTE) ? 'x' : '-',
		    (vme->etype & UVM_ET_COPYONWRITE) ? 'p' : 's',
		    (vme->etype & UVM_ET_NEEDSCOPY) ? '+' : '-',
		    (vme->max_protection & VM_PROT_READ) ? 'r' : '-',
		    (vme->max_protection & VM_PROT_WRITE) ? 'w' : '-',
		    (vme->max_protection & VM_PROT_EXECUTE) ? 'x' : '-',
		    vme->inheritance, vme->wired_count, vme->advice,
		    major(dev), minor(dev), (unsigned long long)inode, name);
		if (A(vp))
			printf(" [%p]", P(vp));
		printf("\n");
	}

	if (print_amap && vme->aref.ar_amap) {
		printf(" amap - ref: %d fl: 0x%x maxsl: %d nsl: %d nuse: %d\n",
		    D(amap, vm_amap)->am_ref,
		    D(amap, vm_amap)->am_flags,
		    D(amap, vm_amap)->am_maxslot,
		    D(amap, vm_amap)->am_nslot,
		    D(amap, vm_amap)->am_nused);
		if (sum) {
			sum->s_am_nslots += D(amap, vm_amap)->am_nslot;
			sum->s_am_maxslots += D(amap, vm_amap)->am_maxslot;
			sum->s_am_nusedslots += D(amap, vm_amap)->am_nused;
		}
	}

	/* no access allowed, don't count space */
	if ((vme->protection & rwx) == 0)
		sz = 0;

	return (sz);
}
char *
findname(kvm_t *kd, struct kbit *vmspace,
    struct vm_map_entry *vme, struct kbit *vp,
    struct kbit *vfs, struct kbit *uvm_obj)
{
	static char buf[1024], *name;
	size_t l;

	if (UVM_ET_ISOBJ(vme)) {
		if (A(vfs)) {
			l = strlen(D(vfs, mount)->mnt_stat.f_mntonname);
			switch (search_cache(kd, vp, &name, buf, sizeof(buf))) {
			case 0: /* found something */
				if (name - (1 + 11 + l) < buf)
					break;
				name--;
				*name = '/';
				/*FALLTHROUGH*/
			case 2: /* found nothing */
				name -= 11;
				memcpy(name, " -unknown- ", (size_t)11);
				name -= l;
				memcpy(name,
				    D(vfs, mount)->mnt_stat.f_mntonname, l);
				break;
			case 1: /* all is well */
				if (name - (1 + l) < buf)
					break;
				name--;
				*name = '/';
				if (l != 1) {
					name -= l;
					memcpy(name,
					    D(vfs, mount)->mnt_stat.f_mntonname, l);
				}
				break;
			}
		} else if (UVM_OBJ_IS_DEVICE(D(uvm_obj, uvm_object))) {
			struct kbit kdev;
			dev_t dev;

			P(&kdev) = P(uvm_obj);
			S(&kdev) = sizeof(struct uvm_device);
			KDEREF(kd, &kdev);
			dev = D(&kdev, uvm_device)->u_device;
			name = devname(dev, S_IFCHR);
			if (name != NULL)
				snprintf(buf, sizeof(buf), "/dev/%s", name);
			else
				snprintf(buf, sizeof(buf), "  [ device %d,%d ]",
				    major(dev), minor(dev));
			name = buf;
		} else if (UVM_OBJ_IS_AOBJ(D(uvm_obj, uvm_object)))
			name = "  [ uvm_aobj ]";
		else if (UVM_OBJ_IS_VNODE(D(uvm_obj, uvm_object)))
			name = "  [ ?VNODE? ]";
		else {
			snprintf(buf, sizeof(buf), "  [ unknown (%p) ]",
			    D(uvm_obj, uvm_object)->pgops);
			name = buf;
		}
	} else if (D(vmspace, vmspace)->vm_maxsaddr <= (caddr_t)vme->start &&
	    (D(vmspace, vmspace)->vm_maxsaddr + (size_t)maxssiz) >=
	    (caddr_t)vme->end) {
		name = "  [ stack ]";
	} else if (D(vmspace, vmspace)->vm_daddr <= (caddr_t)vme->start &&
	    D(vmspace, vmspace)->vm_daddr + BRKSIZ >= (caddr_t)vme->end) {
		name = "  [ heap ]";
	} else if (UVM_ET_ISHOLE(vme))
		name = "  [ hole ]";
	else
		name = "  [ anon ]";

	return (name);
}
Exemple #3
0
/*
 * The map entries can *almost* be read with programs like cat.  However,
 * large maps need special programs to read.  It is not easy to implement
 * a program that can sense the required size of the buffer, and then
 * subsequently do a read with the appropriate size.  This operation cannot
 * be atomic.  The best that we can do is to allow the program to do a read
 * with an arbitrarily large buffer, and return as much as we can.  We can
 * return an error code if the buffer is too small (EFBIG), then the program
 * can try a bigger buffer.
 */
int
procfs_domap(struct lwp *curl, struct proc *p, struct pfsnode *pfs,
	     struct uio *uio, int linuxmode)
{
	int error;
	struct vmspace *vm;
	struct vm_map *map;
	struct vm_map_entry *entry;
	char *buffer = NULL;
	size_t bufsize = BUFFERSIZE;
	char *path;
	struct vnode *vp;
	struct vattr va;
	dev_t dev;
	long fileid;
	size_t pos;
	int width = (int)((curl->l_proc->p_flag & PK_32) ? sizeof(int32_t) : 
	    sizeof(void *)) * 2;

	if (uio->uio_rw != UIO_READ)
		return EOPNOTSUPP;

	if (uio->uio_offset != 0) {
		/*
		 * we return 0 here, so that the second read returns EOF
		 * we don't support reading from an offset because the
		 * map could have changed between the two reads.
		 */
		return 0;
	}

	error = 0;

	if (linuxmode != 0)
		path = malloc(MAXPATHLEN * 4, M_TEMP, M_WAITOK);
	else
		path = NULL;

	if ((error = proc_vmspace_getref(p, &vm)) != 0)
		goto out;

	map = &vm->vm_map;
	vm_map_lock_read(map);

again:
	buffer = malloc(bufsize, M_TEMP, M_WAITOK);
	pos = 0;
	for (entry = map->header.next; entry != &map->header;
	    entry = entry->next) {

		if (UVM_ET_ISSUBMAP(entry))
			continue;

		if (linuxmode != 0) {
			*path = 0;
			dev = (dev_t)0;
			fileid = 0;
			if (UVM_ET_ISOBJ(entry) &&
			    UVM_OBJ_IS_VNODE(entry->object.uvm_obj)) {
				vp = (struct vnode *)entry->object.uvm_obj;
				vn_lock(vp, LK_SHARED | LK_RETRY);
				error = VOP_GETATTR(vp, &va, curl->l_cred);
				VOP_UNLOCK(vp);
				if (error == 0 && vp != pfs->pfs_vnode) {
					fileid = va.va_fileid;
					dev = va.va_fsid;
					error = vnode_to_path(path,
					    MAXPATHLEN * 4, vp, curl, p);
				}
			}
			pos += snprintf(buffer + pos, bufsize - pos,
			    "%.*"PRIxVADDR"-%.*"PRIxVADDR" %c%c%c%c "
			    "%.*lx %.2llx:%.2llx %-8ld %25.s %s\n",
			    width, entry->start,
			    width, entry->end,
			    (entry->protection & VM_PROT_READ) ? 'r' : '-',
			    (entry->protection & VM_PROT_WRITE) ? 'w' : '-',
			    (entry->protection & VM_PROT_EXECUTE) ? 'x' : '-',
			    (entry->etype & UVM_ET_COPYONWRITE) ? 'p' : 's',
			    width, (unsigned long)entry->offset,
			    (unsigned long long)major(dev),
			    (unsigned long long)minor(dev), fileid, "", path);
		} else {
			pos += snprintf(buffer + pos, bufsize - pos,
			    "%#"PRIxVADDR" %#"PRIxVADDR" "
			    "%c%c%c %c%c%c %s %s %d %d %d\n",
			    entry->start, entry->end,
			    (entry->protection & VM_PROT_READ) ? 'r' : '-',
			    (entry->protection & VM_PROT_WRITE) ? 'w' : '-',
			    (entry->protection & VM_PROT_EXECUTE) ? 'x' : '-',
			    (entry->max_protection & VM_PROT_READ) ? 'r' : '-',
			    (entry->max_protection & VM_PROT_WRITE) ? 'w' : '-',
			    (entry->max_protection & VM_PROT_EXECUTE) ?
				'x' : '-',
			    (entry->etype & UVM_ET_COPYONWRITE) ?
				"COW" : "NCOW",
			    (entry->etype & UVM_ET_NEEDSCOPY) ? "NC" : "NNC",
			    entry->inheritance, entry->wired_count,
			    entry->advice);
		}
		if (pos >= bufsize) {
			bufsize <<= 1;
			if (bufsize > MAXBUFFERSIZE) {
				error = ENOMEM;
				vm_map_unlock_read(map);
				uvmspace_free(vm);
				goto out;
			}
			free(buffer, M_TEMP);
			goto again;
		}
	}

	vm_map_unlock_read(map);
	uvmspace_free(vm);

	error = uiomove(buffer, pos, uio);
out:
	if (path != NULL)
		free(path, M_TEMP);
	if (buffer != NULL)
		free(buffer, M_TEMP);

	return error;
}