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_java_util_zip_ZipFile_open(JNIEnv *env, jclass cls, jstring name,
jint mode, jlong lastModified,
jboolean usemmap)
{
const char *path = JNU_GetStringPlatformChars(env, name, 0);
char *msg = 0;
jlong result = 0;
int flag = 0;
jzfile *zip = 0;
if (mode & OPEN_READ) flag |= O_RDONLY;
if (mode & OPEN_DELETE) flag |= JVM_O_DELETE;
if (path != 0) {
zip = ZIP_Get_From_Cache(path, &msg, lastModified);
if (zip == 0 && msg == 0) {
ZFILE zfd = 0;
#ifdef WIN32
zfd = winFileHandleOpen(env, name, flag);
if (zfd == -1) {
/* Exception already pending. */
goto finally;
}
#else
zfd = JVM_Open(path, flag, 0);
if (zfd < 0) {
throwFileNotFoundException(env, name);
goto finally;
}
#endif
zip = ZIP_Put_In_Cache0(path, zfd, &msg, lastModified, usemmap);
}
if (zip != 0) {
result = ptr_to_jlong(zip);
} else if (msg != 0) {
ThrowZipException(env, msg);
free(msg);
} else if (errno == ENOMEM) {
JNU_ThrowOutOfMemoryError(env, 0);
} else {
ThrowZipException(env, "error in opening zip file");
}
finally:
JNU_ReleaseStringPlatformChars(env, name, path);
}
return result;
}
WITH_PLATFORM_STRING(env, path, ps) {
FD fd;
#ifdef __linux__
/* Remove trailing slashes, since the kernel won't */
char *p = (char *)ps + strlen(ps) - 1;
while ((p > ps) && (*p == '/'))
*p-- = '\0';
#endif
fd = JVM_Open(ps, flags, 0666);
if (fd >= 0) {
SET_FD(this, fd, fid);
} else {
throwFileNotFoundException(env, path);
}
} END_PLATFORM_STRING(env, ps);
/*
* Opens the named file for reading, returning a ZFILE.
*
* Compare this with winFileHandleOpen in windows/native/java/io/io_util_md.c.
* This function does not take JNIEnv* and uses CreateFile (instead of
* CreateFileW). The expectation is that this function will be called only
* from ZIP_Open_Generic, which in turn is used by the JVM, where we do not
* need to concern ourselves with wide chars.
*/
static ZFILE
ZFILE_Open(const char *fname, int flags) {
#ifdef WIN32
const DWORD access =
(flags & O_RDWR) ? (GENERIC_WRITE | GENERIC_READ) :
(flags & O_WRONLY) ? GENERIC_WRITE :
GENERIC_READ;
const DWORD sharing =
FILE_SHARE_READ | FILE_SHARE_WRITE;
const DWORD disposition =
/* Note: O_TRUNC overrides O_CREAT */
(flags & O_TRUNC) ? CREATE_ALWAYS :
(flags & O_CREAT) ? OPEN_ALWAYS :
OPEN_EXISTING;
const DWORD maybeWriteThrough =
(flags & (O_SYNC | O_DSYNC)) ?
FILE_FLAG_WRITE_THROUGH :
FILE_ATTRIBUTE_NORMAL;
const DWORD maybeDeleteOnClose =
(flags & O_TEMPORARY) ?
FILE_FLAG_DELETE_ON_CLOSE :
FILE_ATTRIBUTE_NORMAL;
const DWORD flagsAndAttributes = maybeWriteThrough | maybeDeleteOnClose;
return (jlong) CreateFile(
fname, /* Wide char path name */
access, /* Read and/or write permission */
sharing, /* File sharing flags */
NULL, /* Security attributes */
disposition, /* creation disposition */
flagsAndAttributes, /* flags and attributes */
NULL);
#else
return JVM_Open(fname, flags, 0);
#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
}
