| /* |
| * Copyright (c) 2003, 2005, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| #include "jni.h" |
| #include "jni_util.h" |
| #include "jlong.h" |
| #include "jvm.h" |
| #include "management.h" |
| #include "com_sun_management_UnixOperatingSystem.h" |
| |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <sys/swap.h> |
| #include <sys/resource.h> |
| #include <sys/times.h> |
| #include <sys/sysinfo.h> |
| #include <ctype.h> |
| #include <dirent.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <limits.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| |
| static jlong page_size = 0; |
| |
| /* This gets us the new structured proc interfaces of 5.6 & later */ |
| /* - see comment in <sys/procfs.h> */ |
| #define _STRUCTURED_PROC 1 |
| #include <sys/procfs.h> |
| |
| static struct dirent* read_dir(DIR* dirp, struct dirent* entry) { |
| #ifdef __solaris__ |
| struct dirent* dbuf = readdir(dirp); |
| return dbuf; |
| #else /* __linux__ */ |
| struct dirent* p; |
| if (readdir_r(dirp, entry, &p) == 0) { |
| return p; |
| } else { |
| return NULL; |
| } |
| #endif |
| } |
| |
| // true = get available swap in bytes |
| // false = get total swap in bytes |
| static jlong get_total_or_available_swap_space_size(JNIEnv* env, jboolean available) { |
| #ifdef __solaris__ |
| long total, avail; |
| int nswap, i, count; |
| swaptbl_t *stbl; |
| char *strtab; |
| |
| // First get the number of swap resource entries |
| if ((nswap = swapctl(SC_GETNSWP, NULL)) == -1) { |
| throw_internal_error(env, "swapctl failed to get nswap"); |
| return -1; |
| } |
| if (nswap == 0) { |
| return 0; |
| } |
| |
| // Allocate storage for resource entries |
| stbl = (swaptbl_t*) malloc(nswap * sizeof(swapent_t) + |
| sizeof(struct swaptable)); |
| if (stbl == NULL) { |
| JNU_ThrowOutOfMemoryError(env, 0); |
| return -1; |
| } |
| |
| // Allocate storage for the table |
| strtab = (char*) malloc((nswap + 1) * MAXPATHLEN); |
| if (strtab == NULL) { |
| free(stbl); |
| JNU_ThrowOutOfMemoryError(env, 0); |
| return -1; |
| } |
| |
| for (i = 0; i < (nswap + 1); i++) { |
| stbl->swt_ent[i].ste_path = strtab + (i * MAXPATHLEN); |
| } |
| stbl->swt_n = nswap + 1; |
| |
| // Get the entries |
| if ((count = swapctl(SC_LIST, stbl)) < 0) { |
| free(stbl); |
| free(strtab); |
| throw_internal_error(env, "swapctl failed to get swap list"); |
| return -1; |
| } |
| |
| // Sum the entries to get total and free swap |
| total = 0; |
| avail = 0; |
| for (i = 0; i < count; i++) { |
| total += stbl->swt_ent[i].ste_pages; |
| avail += stbl->swt_ent[i].ste_free; |
| } |
| |
| free(stbl); |
| free(strtab); |
| return available ? ((jlong)avail * page_size) : |
| ((jlong)total * page_size); |
| #else /* __linux__ */ |
| int ret; |
| FILE *fp; |
| jlong total = 0, avail = 0; |
| |
| struct sysinfo si; |
| ret = sysinfo(&si); |
| if (ret != 0) { |
| throw_internal_error(env, "sysinfo failed to get swap size"); |
| } |
| total = (jlong)si.totalswap * si.mem_unit; |
| avail = (jlong)si.freeswap * si.mem_unit; |
| |
| return available ? avail : total; |
| #endif |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_com_sun_management_UnixOperatingSystem_initialize |
| (JNIEnv *env, jclass cls) |
| { |
| page_size = sysconf(_SC_PAGESIZE); |
| } |
| |
| JNIEXPORT jlong JNICALL |
| Java_com_sun_management_UnixOperatingSystem_getCommittedVirtualMemorySize |
| (JNIEnv *env, jobject mbean) |
| { |
| #ifdef __solaris__ |
| psinfo_t psinfo; |
| ssize_t result; |
| size_t remaining; |
| char* addr; |
| int fd; |
| |
| fd = JVM_Open("/proc/self/psinfo", O_RDONLY, 0); |
| if (fd < 0) { |
| throw_internal_error(env, "Unable to open /proc/self/psinfo"); |
| return -1; |
| } |
| |
| addr = (char *)&psinfo; |
| for (remaining = sizeof(psinfo_t); remaining > 0;) { |
| result = JVM_Read(fd, addr, remaining); |
| if (result < 0) { |
| JVM_Close(fd); |
| throw_internal_error(env, "Unable to read /proc/self/psinfo"); |
| return -1; |
| } |
| remaining -= result; |
| addr += result; |
| } |
| |
| JVM_Close(fd); |
| return (jlong) psinfo.pr_size * 1024; |
| #else /* __linux__ */ |
| FILE *fp; |
| unsigned long vsize = 0; |
| |
| if ((fp = fopen("/proc/self/stat", "r")) == NULL) { |
| throw_internal_error(env, "Unable to open /proc/self/stat"); |
| return -1; |
| } |
| |
| // Ignore everything except the vsize entry |
| if (fscanf(fp, "%*d %*s %*c %*d %*d %*d %*d %*d %*u %*u %*u %*u %*u %*d %*d %*d %*d %*d %*d %*u %*u %*d %lu %*[^\n]\n", &vsize) == EOF) { |
| throw_internal_error(env, "Unable to get virtual memory usage"); |
| fclose(fp); |
| return -1; |
| } |
| |
| fclose(fp); |
| return (jlong)vsize; |
| #endif |
| } |
| |
| JNIEXPORT jlong JNICALL |
| Java_com_sun_management_UnixOperatingSystem_getTotalSwapSpaceSize |
| (JNIEnv *env, jobject mbean) |
| { |
| return get_total_or_available_swap_space_size(env, JNI_FALSE); |
| } |
| |
| JNIEXPORT jlong JNICALL |
| Java_com_sun_management_UnixOperatingSystem_getFreeSwapSpaceSize |
| (JNIEnv *env, jobject mbean) |
| { |
| return get_total_or_available_swap_space_size(env, JNI_TRUE); |
| } |
| |
| JNIEXPORT jlong JNICALL |
| Java_com_sun_management_UnixOperatingSystem_getProcessCpuTime |
| (JNIEnv *env, jobject mbean) |
| { |
| jlong clk_tck, ns_per_clock_tick; |
| jlong cpu_time_ns; |
| struct tms time; |
| |
| #ifdef __solaris__ |
| clk_tck = (jlong) sysconf(_SC_CLK_TCK); |
| #else /* __linux__ */ |
| clk_tck = 100; |
| #endif |
| if (clk_tck == -1) { |
| throw_internal_error(env, |
| "sysconf failed - not able to get clock tick"); |
| return -1; |
| } |
| |
| times(&time); |
| ns_per_clock_tick = (jlong) 1000 * 1000 * 1000 / (jlong) clk_tck; |
| cpu_time_ns = ((jlong)time.tms_utime + (jlong) time.tms_stime) * |
| ns_per_clock_tick; |
| return cpu_time_ns; |
| } |
| |
| JNIEXPORT jlong JNICALL |
| Java_com_sun_management_UnixOperatingSystem_getFreePhysicalMemorySize |
| (JNIEnv *env, jobject mbean) |
| { |
| jlong num_avail_physical_pages = sysconf(_SC_AVPHYS_PAGES); |
| return (num_avail_physical_pages * page_size); |
| } |
| |
| JNIEXPORT jlong JNICALL |
| Java_com_sun_management_UnixOperatingSystem_getTotalPhysicalMemorySize |
| (JNIEnv *env, jobject mbean) |
| { |
| jlong num_physical_pages = sysconf(_SC_PHYS_PAGES); |
| return (num_physical_pages * page_size); |
| } |
| |
| JNIEXPORT jlong JNICALL |
| Java_com_sun_management_UnixOperatingSystem_getOpenFileDescriptorCount |
| (JNIEnv *env, jobject mbean) |
| { |
| DIR *dirp; |
| struct dirent dbuf; |
| struct dirent* dentp; |
| jlong fds = 0; |
| |
| dirp = opendir("/proc/self/fd"); |
| if (dirp == NULL) { |
| throw_internal_error(env, "Unable to open directory /proc/self/fd"); |
| return -1; |
| } |
| |
| // iterate through directory entries, skipping '.' and '..' |
| // each entry represents an open file descriptor. |
| while ((dentp = read_dir(dirp, &dbuf)) != NULL) { |
| if (isdigit(dentp->d_name[0])) { |
| fds++; |
| } |
| } |
| |
| closedir(dirp); |
| // subtract by 1 which was the fd open for this implementation |
| return (fds - 1); |
| } |
| |
| JNIEXPORT jlong JNICALL |
| Java_com_sun_management_UnixOperatingSystem_getMaxFileDescriptorCount |
| (JNIEnv *env, jobject mbean) |
| { |
| struct rlimit rlp; |
| |
| if (getrlimit(RLIMIT_NOFILE, &rlp) == -1) { |
| throw_internal_error(env, "getrlimit failed"); |
| return -1; |
| } |
| return (jlong) rlp.rlim_cur; |
| } |