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
}
/*
* The io_util_md.h files do not provide IO_CLOSE, hence we use platform
* specifics.
*/
static void
ZFILE_Close(ZFILE zfd) {
#ifdef WIN32
CloseHandle((HANDLE) zfd);
#else
JVM_Close(zfd);
#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
}