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_getFreePhysicalMemorySize
(JNIEnv *env, jobject mbean)
{
#ifdef __APPLE__
mach_msg_type_number_t count;
vm_statistics_data_t vm_stats;
kern_return_t res;
count = HOST_VM_INFO_COUNT;
res = host_statistics(mach_host_self(), HOST_VM_INFO, (host_info_t)&vm_stats, &count);
if (res != KERN_SUCCESS) {
throw_internal_error(env, "host_statistics failed");
return -1;
}
return (jlong)vm_stats.free_count * page_size;
#elif defined(_ALLBSD_SOURCE)
/*
* XXXBSD: there's no way available to do it in FreeBSD, AFAIK.
*/
// throw_internal_error(env, "Unimplemented in FreeBSD");
return (128 * MB);
#else // solaris / linux
jlong num_avail_physical_pages = sysconf(_SC_AVPHYS_PAGES);
return (num_avail_physical_pages * page_size);
#endif
}
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_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_sun_management_OperatingSystemImpl_getTotalPhysicalMemorySize
(JNIEnv *env, jobject mbean)
{
#ifdef _ALLBSD_SOURCE
jlong result = 0;
int mib[2];
size_t rlen;
mib[0] = CTL_HW;
mib[1] = HW_MEMSIZE;
rlen = sizeof(result);
if (sysctl(mib, 2, &result, &rlen, NULL, 0) != 0) {
throw_internal_error(env, "sysctl failed");
return -1;
}
return result;
#elif defined(_AIX)
perfstat_memory_total_t memory_info;
if (-1 != perfstat_memory_total(NULL, &memory_info, sizeof(perfstat_memory_total_t), 1)) {
return (jlong)(memory_info.real_total * 4L * 1024L);
}
return -1;
#else // solaris / linux
jlong num_physical_pages = sysconf(_SC_PHYS_PAGES);
return (num_physical_pages * page_size);
#endif
}
JNIEXPORT jlong JNICALL
Java_sun_management_OperatingSystemImpl_getFreePhysicalMemorySize
(JNIEnv *env, jobject mbean)
{
#ifdef __APPLE__
mach_msg_type_number_t count;
vm_statistics_data_t vm_stats;
kern_return_t res;
count = HOST_VM_INFO_COUNT;
res = host_statistics(mach_host_self(), HOST_VM_INFO, (host_info_t)&vm_stats, &count);
if (res != KERN_SUCCESS) {
throw_internal_error(env, "host_statistics failed");
return -1;
}
return (jlong)vm_stats.free_count * page_size;
#elif defined(_ALLBSD_SOURCE)
/*
* XXBSDL no way to do it in FreeBSD
*/
// throw_internal_error(env, "unimplemented in FreeBSD")
return (128 * MB);
#elif defined(_AIX)
perfstat_memory_total_t memory_info;
if (-1 != perfstat_memory_total(NULL, &memory_info, sizeof(perfstat_memory_total_t), 1)) {
return (jlong)(memory_info.real_free * 4L * 1024L);
}
return -1;
#else // solaris / linux
jlong num_avail_physical_pages = sysconf(_SC_AVPHYS_PAGES);
return (num_avail_physical_pages * page_size);
#endif
}
JNIEXPORT jlong JNICALL
Java_com_sun_management_UnixOperatingSystem_getProcessCpuTime
(JNIEnv *env, jobject mbean)
{
#ifdef __APPLE__
struct rusage usage;
if (getrusage(RUSAGE_SELF, &usage) != 0) {
throw_internal_error(env, "getrusage failed");
return -1;
}
jlong microsecs =
usage.ru_utime.tv_sec * 1000 * 1000 + usage.ru_utime.tv_usec +
usage.ru_stime.tv_sec * 1000 * 1000 + usage.ru_stime.tv_usec;
return microsecs * 1000;
#else
jlong clk_tck, ns_per_clock_tick;
jlong cpu_time_ns;
struct tms time;
/*
* BSDNOTE: FreeBSD implements _SC_CLK_TCK since FreeBSD 5, so
* add a magic to handle it
*/
#if defined(__solaris__) || defined(_SC_CLK_TCK)
clk_tck = (jlong) sysconf(_SC_CLK_TCK);
#elif defined(__linux__) || defined(_ALLBSD_SOURCE)
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;
#endif
}
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;
}
JNIEXPORT void JNICALL
Java_com_sun_management_OperatingSystem_initialize
(JNIEnv *env, jclass cls)
{
OSVERSIONINFO oi;
oi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
GetVersionEx(&oi);
switch(oi.dwPlatformId) {
case VER_PLATFORM_WIN32_WINDOWS: is_nt = JNI_FALSE; break;
case VER_PLATFORM_WIN32_NT: is_nt = JNI_TRUE; break;
default:
throw_internal_error(env, "Unsupported Platform");
return;
}
main_process = GetCurrentProcess();
}
JNIEXPORT jlong JNICALL
Java_com_sun_management_UnixOperatingSystem_getTotalPhysicalMemorySize
(JNIEnv *env, jobject mbean)
{
#ifdef _ALLBSD_SOURCE
jlong result = 0;
int mib[2];
size_t rlen;
mib[0] = CTL_HW;
mib[1] = HW_MEMSIZE;
rlen = sizeof(result);
if (sysctl(mib, 2, &result, &rlen, NULL, 0) != 0) {
throw_internal_error(env, "sysctl failed");
return -1;
}
return result;
#else // solaris / linux
jlong num_physical_pages = sysconf(_SC_PHYS_PAGES);
return (num_physical_pages * page_size);
#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);
#elif defined(__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;
#elif defined(__APPLE__)
struct xsw_usage vmusage;
size_t size = sizeof(vmusage);
if (sysctlbyname("vm.swapusage", &vmusage, &size, NULL, 0) != 0) {
throw_internal_error(env, "sysctlbyname failed");
}
return available ? (jlong)vmusage.xsu_avail : (jlong)vmusage.xsu_total;
#else /* _ALLBSD_SOURCE */
/*
* XXXBSD: there's no way available to get swap info in
* FreeBSD. Usage of libkvm is not an option here
*/
// throw_internal_error(env, "Unimplemented in FreeBSD");
return (0);
#endif
}
JNIEXPORT jlong JNICALL
Java_com_sun_management_UnixOperatingSystem_getOpenFileDescriptorCount
(JNIEnv *env, jobject mbean)
{
#ifdef __APPLE__
// This code is influenced by the darwin lsof source
pid_t my_pid;
struct proc_bsdinfo bsdinfo;
struct proc_fdinfo *fds;
int nfiles;
kern_return_t kres;
int res;
size_t fds_size;
kres = pid_for_task(mach_task_self(), &my_pid);
if (res != KERN_SUCCESS) {
throw_internal_error(env, "pid_for_task failed");
return -1;
}
// get the maximum number of file descriptors
res = proc_pidinfo(my_pid, PROC_PIDTBSDINFO, 0, &bsdinfo, PROC_PIDTBSDINFO_SIZE);
if (res <= 0) {
throw_internal_error(env, "proc_pidinfo with PROC_PIDTBSDINFO failed");
return -1;
}
// allocate memory to hold the fd information (we don't acutally use this information
// but need it to get the number of open files)
fds_size = bsdinfo.pbi_nfiles * sizeof(struct proc_fdinfo);
fds = malloc(fds_size);
if (fds == NULL) {
JNU_ThrowOutOfMemoryError(env, "could not allocate space for file descriptors");
return -1;
}
// get the list of open files - the return value is the number of bytes
// proc_pidinfo filled in
res = proc_pidinfo(my_pid, PROC_PIDLISTFDS, 0, fds, fds_size);
if (res <= 0) {
free(fds);
throw_internal_error(env, "proc_pidinfo failed for PROC_PIDLISTFDS");
return -1;
}
nfiles = res / sizeof(struct proc_fdinfo);
free(fds);
return nfiles;
#elif defined(_ALLBSD_SOURCE)
/*
* XXXBSD: there's no way available to do it in FreeBSD, AFAIK.
*/
// throw_internal_error(env, "Unimplemented in FreeBSD");
return (100);
#else /* solaris/linux */
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);
#endif
}
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;
#elif defined(__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;
#elif defined(__APPLE__)
struct task_basic_info t_info;
mach_msg_type_number_t t_info_count = TASK_BASIC_INFO_COUNT;
kern_return_t res = task_info(mach_task_self(), TASK_BASIC_INFO, (task_info_t)&t_info, &t_info_count);
if (res != KERN_SUCCESS) {
throw_internal_error(env, "task_info failed");
}
return t_info.virtual_size;
#else /* _ALLBSD_SOURCE */
/*
* XXXBSD: there's no way available to do it in FreeBSD, AFAIK.
*/
// throw_internal_error(env, "Unimplemented in FreeBSD");
return (64 * MB);
#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
}