epickrram

/*
From http://hg.openjdk.java.net/jdk8/jdk8/jdk/file/687fd7c7986d/src/share/native/java/io/io_util.c#l145
*/
void
writeBytes(JNIEnv *env, jobject this, jbyteArray bytes,
           jint off, jint len, jboolean append, jfieldID fid)
{
    jint n;
    char stackBuf[BUF_SIZE];
    char *buf = NULL;

epickrram

/*
From http://hg.openjdk.java.net/jdk8/jdk8/jdk/file/687fd7c7986d/src/solaris/native/java/io/io_util_md.h#l71
*/
#define IO_Write handleWrite
#define IO_Append handleWrite

// ...

/*
http://hg.openjdk.java.net/jdk8/jdk8/jdk/file/687fd7c7986d/src/solaris/native/java/io/io_util_md.c#l160

epickrram

/*
From http://hg.openjdk.java.net/jdk8/jdk8/jdk/file/687fd7c7986d/src/solaris/native/sun/nio/ch/FileDispatcherImpl.c#l111
*/
Java_sun_nio_ch_FileDispatcherImpl_pwrite0(JNIEnv *env, jclass clazz, jobject fdo,
                            jlong address, jint len, jlong offset)
{
    jint fd = fdval(env, fdo);
    void *buf = (void *)jlong_to_ptr(address);

    return convertReturnVal(env, pwrite64(fd, buf, len, offset), JNI_FALSE);

epickrram

/*
From http://hg.openjdk.java.net/jdk8/jdk8/jdk/file/687fd7c7986d/src/share/classes/java/nio/channels/FileChannel.java#l778
*/
public abstract int write(ByteBuffer src, long position) throws IOException;

// ...

/*
http://hg.openjdk.java.net/jdk8/jdk8/jdk/file/687fd7c7986d/src/share/classes/sun/nio/ch/FileChannelImpl.java#l703
*/

epickrram

ssize_t new_sync_read(struct file *filp, char __user *buf, size_t len, loff_t *ppos)
{
       struct iovec iov = { .iov_base = buf, .iov_len = len };
       struct kiocb kiocb;
       struct iov_iter iter;
       ssize_t ret;

       init_sync_kiocb(&kiocb, filp);
       kiocb.ki_pos = *ppos;
       kiocb.ki_nbytes = len;

epickrram

xfs_file_read_iter(
       struct kiocb            *iocb,
       struct iov_iter         *to)
{
...
       xfs_rw_ilock(ip, XFS_IOLOCK_SHARED);
...
       ret = generic_file_read_iter(iocb, to);
...
       xfs_rw_iunlock(ip, XFS_IOLOCK_SHARED);

epickrram

xfs_file_buffered_aio_write(
       struct kiocb            *iocb,
       struct iov_iter         *from)
{
...
       int                     iolock = XFS_IOLOCK_EXCL;
...
       xfs_rw_ilock(ip, iolock);
...
       ret = generic_perform_write(file, from, pos);

epickrram

private static final class Unicorn
    {
        private static int mainMethodLineOfLastPatInvocation = 0;

        private static boolean pat()
        {
            boolean result = false;
            final StackTraceElement[] stackTrace = Thread.currentThread().getStackTrace();
            final StackTraceElement mainMethodInvocationPoint = stackTrace[3];
            if(mainMethodInvocationPoint.getLineNumber() != mainMethodLineOfLastPatInvocation)

epickrram

static final class Unicorn
    {
        private static int mainMethodLineOfLastPatInvocation = 0;

        private static boolean pat()
        {
            boolean result = false;
            final StackTraceElement[] stackTrace = Thread.currentThread().getStackTrace();
            final StackTraceElement mainMethodInvocationPoint = stackTrace[3];
            if(mainMethodInvocationPoint.getLineNumber() != mainMethodLineOfLastPatInvocation)

epickrram

private static final class Unicorn
    {
        private static int mainMethodLineOfLastPatInvocation = 0;

        private static boolean pat()
        {
            boolean result = false;
            final StackTraceElement[] stackTrace = Thread.currentThread().getStackTrace();
            final StackTraceElement mainMethodInvocationPoint = stackTrace[3];
            if(mainMethodInvocationPoint.getLineNumber() != mainMethodLineOfLastPatInvocation)