Commit Graph

659 Commits

Author SHA1 Message Date
Scott Mitchell
583a59abb1 ByteBufUtil.compare int underflow
Motivation:
ByteBufUtil.compare uses long arithmetic but doesn't check for underflow on when converting from long to int to satisfy the Comparable interface. This will result in incorrect comparisons and violate the Comparable interface contract.

Modifications:
- ByteBufUtil.compare should protect against int underflow

Result:
Fixes https://github.com/netty/netty/issues/6169
2017-01-10 11:43:59 -08:00
Norman Maurer
89e93968ac Remove usage of own Atomic*FieldUpdater in favor of JDKs
Motivation:

In later Java8 versions our Atomic*FieldUpdater are slower then the JDK implementations so we should not use ours anymore. Even worse the JDK implementations provide for example an optimized version of addAndGet(...) using intrinsics which makes it a lot faster for this use-case.

Modifications:

- Remove methods that return our own Atomic*FieldUpdaters.
- Use the JDK implementations everywhere.

Result:

Faster code.
2016-12-15 08:09:06 +00:00
Norman Maurer
712c16ad83 Ensure leak aware buffers correctly close the ResourceLeakTracker
Motivation:

We should assert that the leak aware buffers correctly close the ResourceLeakTracker in the unit tests.

Modifications:

- Keep track of NoopResourceLeakTrackers and check if these were closed once the test completes
- Fix bugs in tests so the buffers are all released.

Result:

Better tests for leak aware buffers
2016-12-08 19:33:20 +01:00
Norman Maurer
24b39bc287 Only schedule a ThreadDeathWatcher task if caches are used.
Motivation:

If caches are disabled it does not make sense to schedule a task that will free up memory consumed by the caches.

Modifications:

Do not schedule if caches are disabled.

Result:

Less overhead.
2016-12-08 10:36:29 +01:00
Norman Maurer
13a8ebade4 Correctly handle the case when no ResourceLeakTracker was created for derived pooled buffers. This was missed in c2f4daa739 2016-12-04 23:09:23 +01:00
Norman Maurer
c2f4daa739 Fix false-positives when using ResourceLeakDetector.
Motivation:

We need to ensure the tracked object can not be GC'ed before ResourceLeak.close() is called as otherwise we may get false-positives reported by the ResourceLeakDetector. This can happen as the JIT / GC may be able to figure out that we do not need the tracked object anymore and so already enqueue it for collection before we actually get a chance to close the enclosing ResourceLeak.

Modifications:

- Add ResourceLeakTracker and deprecate the old ResourceLeak
- Fix some javadocs to correctly release buffers.
- Add a unit test for ResourceLeakDetector that shows that ResourceLeakTracker has not the problems.

Result:

No more false-positives reported by ResourceLeakDetector when ResourceLeakDetector.track(...) is used.
2016-12-04 09:01:39 +01:00
Norman Maurer
243b2b9f19 PooledByteBufAllocatorTest may has memory visiblity issues as it uses non concurrent queue
Motivation:

PooledByteBufAllocatorTest uses an ArrayQueue but access it from multiple threads (not concurrently but still from different threads). This may leak to memory visibility issues.

Modifications:

- Use a concurrent queue
- Some cleanup

Result:

Non racy test code.
2016-12-02 07:42:19 +01:00
Norman Maurer
2b8fd8d43b Allow to disable caching in PooledByteBufAllocator for non FastThreadLocalThreads
Motivation:

If a user allocates a lot from outside the EventLoop we may end up creating a lot of caches in the PooledByteBufAllocator. This may be wasteful and so it may be useful for an other to configure that caches should only be used from within EventLoops.

Modifications:

Add new constructor which allows to configure the caching behaviour.

Result:

More flexible configuration of PooledByteBufAllocator possible
2016-12-02 07:40:33 +01:00
Norman Maurer
5bc447c539 Allow to build netty when sun.misc.Unsafe is not avaible or -Dio.netty.noUnsafe=true is used.
Motivation:

We support using Netty without sun.misc.Unsafe, so we should also support building it without it. This way we can also run all tests without sun.misc.Unsafe and so see if it works as expected.

Modifications:

Correctly skip tests that depend on sun.misc.Unsafe if its not present or -Dio.netty.noUnsafe=true is used.

Result:

Be able to build netty without sun.misc.Unsafe
2016-12-01 21:24:49 +01:00
Norman Maurer
feae0435b5 SwappedByteBuf.unwrap() should return wrapped buffer.
Motivation:

SwappedByteBuf.unwrap() not returned the wrapped buffer but the buffer that was wrapped by the original buffer. This is not correct.

Modifications:

Correctly return wrapped buffer and fix test.

Result:

SwappedByteBuf.unwrap() works as expected.
2016-12-01 21:22:30 +01:00
Norman Maurer
f70757da2a [#6015] Fix racy PooledByteBufAllocatorTests
Motivation:

We had a few tests PooledByteBufAllocatorTests which used parkNanos(...) to give a resource enough time to get destroyed. This is race and may not be good enough.

Modifications:

Ensure the ThreadCache is really destroyed.

Result:

No more racy tests that depend on ThreadCaches.
2016-12-01 10:16:12 +01:00
Stephane Landelle
ba95c401a7 Misc clean up
Motivation:
IntelliJ issues several warnings.

Modifications:

* `ClientCookieDecoder` and `ServerCookieDecoder`:
  * `nameEnd`, `valueBegin` and `valueEnd` don't need to be initialized
  * `keyValLoop` loop doesn't been to be labelled, as it's the most inner one (same thing for labelled breaks)
  * Remove `if (i != headerLen)` as condition is always true
* `ClientCookieEncoder` javadoc still mention old logic
* `DefaultCookie`, `ServerCookieEncoder` and `DefaultHttpHeaders` use ternary ops that can be turned into simple boolean ones
* `DefaultHeaders` uses a for(int) loop over an array. It can be turned into a foreach one as javac doesn't allocate an iterator to iterate over arrays
* `DefaultHttp2Headers` and `AbstractByteBuf` `equal` can be turned into a single boolean statement
Result:

Cleaner code
2016-11-22 15:17:05 -08:00
Scott Mitchell
930633350d Consistency between pooled/unpooled derived buffers
Motivation:
4bba7526e2 introduced changes which made pooled and unpooled derived buffers inconsistent in a few ways:
- Pooled derived buffers always generated a duplicate buffer when duplicate() was called and always generated a sliced buffer when slice() was called. Unpooled derived buffers some times generated a sliced buffer when duplicate() was called.
- The indexes that were set for duplicate buffers generated from slices were not always consistent.
There were also some various bugs in the derived pooled buffer implementation.

Modifications:
- Make pooled/unpooled consistently generate duplicate buffers when duplicate() is called and sliced buffers when slice() is called.
- Fix bugs in the derived pooled buffer

Result:
More consistent behavior from the derived pooled/unpooled buffers.
2016-11-21 11:38:10 -08:00
Norman Maurer
c2565d8dd2 Remove usage of releaseLater(...) that was missed in 0bc30a123e 2016-11-18 14:47:42 +00:00
Norman Maurer
0bc30a123e Eliminate usage of releaseLater(...) to reduce memory usage during tests
Motiviation:

We used ReferenceCountUtil.releaseLater(...) in our tests which simplifies a bit the releasing of ReferenceCounted objects. The problem with this is that while it simplifies stuff it increase memory usage a lot as memory may not be freed up in a timely manner.

Modifications:

- Deprecate releaseLater(...)
- Remove usage of releaseLater(...) in tests.

Result:

Less memory needed to build netty while running the tests.
2016-11-18 09:34:11 +01:00
Scott Mitchell
4bba7526e2 retained[Slice|Duplicate] buffer reference count bug
Motivation:
Currently the ByteBuf created as a result of retained[Slice|Duplicate] maintains its own reference count, and when this reference count is depleated it will release the ByteBuf returned from unwrap(). The unwrap() buffer is designed to be the 'root parent' and will skip all intermediate layers of buffers. If the intermediate layers of buffers contain a retained[Slice|Duplicate] then these reference counts will be ignored during deallocation. This may lead to deallocating the 'root parent' before all derived pooled buffers are actually released. This same issue holds if a retained[Slice|Duplicate] is in the heirachy and a 'regular' slice() or duplicate() buffer is created.

Modifications:
- AbstractPooledDerivedByteBuf must maintain a reference to the direct parent (the buffer which retained[Slice|Duplicate] was called on) and release on this buffer instead of the 'root parent' returned by unwrap()
- slice() and duplicate() buffers created from AbstractPooledDerivedByteBuf must also delegate reference count operations to their immediate parent (or first ancestor which maintains an independent reference count).

Result:
Fixes https://github.com/netty/netty/issues/5999
2016-11-17 09:35:39 -08:00
Scott Mitchell
c1932a8537 ByteBuf Input Stream Reference Count Ownership
Motivation:
Netty provides a adaptor from ByteBuf to Java's InputStream interface. The JDK Stream interfaces have an explicit lifetime because they implement the Closable interface. This lifetime may be differnt than the ByteBuf which is wrapped, and controlled by the interface which accepts the JDK Stream. However Netty's ByteBufInputStream currently does not take reference count ownership of the underlying ByteBuf. There may be no way for existing classes which only accept the InputStream interface to communicate when they are done with the stream, other than calling close(). This means that when the stream is closed it may be appropriate to release the underlying ByteBuf, as the ownership of the underlying ByteBuf resource may be transferred to the Java Stream.

Motivation:
- ByteBufInputStream.close() supports taking reference count ownership of the underyling ByteBuf

Result:
ByteBufInputStream can assume reference count ownership so the underlying ByteBuf can be cleaned up when the stream is closed.
2016-11-14 16:29:55 -08:00
Norman Maurer
5f533b7358 [maven-release-plugin] prepare for next development iteration 2016-10-14 13:20:41 +02:00
Norman Maurer
35fb0babe2 [maven-release-plugin] prepare release netty-4.1.6.Final 2016-10-14 12:47:19 +02:00
Norman Maurer
97bf3c0a9b Correctly throw IndexOutOfBoundsException when dst.remaining() is too big.
Motivation:

In some ByteBuf implementations we not correctly implement getBytes(index, ByteBuffer).

Modifications:

Correct code to do what is defined in the javadocs and adding test.

Result:

Implementation works as described.
2016-10-12 14:41:56 +02:00
radai-rosenblatt
15ac6c4a1f Clean-up unused imports
Motivation:

the build doesnt seem to enforce this, so they piled up

Modifications:

removed unused import lines

Result:

less unused imports

Signed-off-by: radai-rosenblatt <radai.rosenblatt@gmail.com>
2016-09-30 09:08:50 +02:00
Norman Maurer
5986c229c4 [#5833] Ensure direct memory is released when DirectPoolArena is collected
Motivation:

We need to ensure we release all direct memory once the DirectPoolArena is collected. Otherwise we may never reclaim the memory and so leak memory.

Modifications:

Ensure we destroy all PoolChunk memory when DirectPoolArena is collected.

Result:

Free up unreleased memory when DirectPoolArena is collected.
2016-09-23 15:20:59 -07:00
Norman Maurer
3103f0551c Share code between retain(...) and release(...) implementations.
Motivation:

We can share the code in retain() and retain(...) and also in release() and release(...).

Modifications:

Share code.

Result:

Less duplicated code.
2016-09-02 21:53:10 +02:00
Norman Maurer
54b1a100f4 [maven-release-plugin] prepare for next development iteration 2016-08-26 10:06:32 +02:00
Norman Maurer
463b5cf21b [#5773] AbstractByteBuf.forEachByteDesc(ByteProcessor) starts from wrong index
Motivation:

We introduced a regression in 1abdbe6f67 which let the iteration start from the wrong index.

Modifications:

Fix start index and add tests.

Result:

Fix regression.
2016-09-01 08:21:12 +02:00
Norman Maurer
1208b90f57 [maven-release-plugin] prepare release netty-4.1.5.Final 2016-08-26 04:59:35 +02:00
Norman Maurer
a01519e4f8 [#5718] Result of ByteBufUtil.compare(ByteBuf a, ByteBuf b) is dependent on ByteOrder of supplied ByteBufs
Motivation:

Result of ByteBufUtil.compare(ByteBuf a, ByteBuf b) is dependent on ByteOrder of supplied ByteBufs which should not be the case (as stated in the javadocs).

Modifications:

Ensure we get a consistent behavior when calling ByteBufUtil.compare(ByteBuf a, ByteBuf b) and not depend on ByteOrder.

Result:

ByteBufUtil.compare(ByteBuf a, ByteBuf b) and so AbstractByteBuf.compare(...) works correctly as stated in the javadocs.
2016-08-26 15:36:06 +02:00
Norman Maurer
e7449b1ef3 [#5645] Allow to create ByteBuf from existing memory address.
Motivation:

Sometimes it is useful to be able to wrap an existing memory address (a.k.a pointer) and create a ByteBuf from it. This way its easier to interopt with other libraries.

Modifications:

Add a new Unpooled.wrappedBuffer(....) method that takes a memory address.

Result:

Be able to wrap an existing memory address into a ByteBuf.
2016-08-16 14:16:15 +02:00
Scott Mitchell
1abdbe6f67 AbstractByteBuf forEach minimize byte code
Motivation:
The default limit for the maximum amount of bytes that a method will be inlined is 35 bytes. AbstractByteBuf#forEach and AbstractByteBuf#forEachDesc comprise of method calls which are more than this maximum default threshold and may prevent or delay inlining for occuring. The byte code for these methods can be reduced to allow for easier inlining. Here are the current byte code sizes:

AbstractByteBuf::forEachByte (24 bytes)
AbstractByteBuf::forEachByte(int,int,..) (14 bytes)
AbstractByteBuf::forEachByteAsc0 (71 bytes)
AbstractByteBuf::forEachByteDesc (24 bytes)
AbstractByteBuf::forEachByteDesc(int,int,.) (24 bytes)
AbstractByteBuf::forEachByteDesc0 (69 bytes)

Modifications:
- Reduce the code for each method in the AbstractByteBuf#forEach and AbstractByteBuf#forEachDesc call stack

Result:
AbstractByteBuf::forEachByte (25 bytes)
AbstractByteBuf::forEachByte(int,int,..) (25 bytes)
AbstractByteBuf::forEachByteAsc0 (29 bytes)
AbstractByteBuf::forEachByteDesc (25 bytes)
AbstractByteBuf::forEachByteDesc(int,int,..) (27 bytes)
AbstractByteBuf::forEachByteDesc0 (29 bytes)
2016-08-10 13:02:16 -07:00
Norman Maurer
65dea8aeec Fix Assume.assumeTrue(...) checks in *UnssafeNoCleanerDirectByteBufTest
Motivation:

We used incorrect assumeTrue(...) checks.

Modifications:

Fix check.

Result:

Be able to run tests also if java.nio.DirectByteBuffer.<init>(long, int) could not be accessed.
2016-08-10 11:11:58 +02:00
Norman Maurer
d44017189e Remove extra conditional check in retain
Motivation:

We not need to do an extra conditional check in retain(...) as we can just check for overflow after we did the increment.

Modifications:

- Remove extra conditional check
- Add test code.

Result:

One conditional check less.
2016-08-05 13:09:26 +02:00
Norman Maurer
3fa8f31055 Reduce conditionals in AbstractReferenceCountedByteBuf
Motivation:
AbstractReferenceCountedByteBuf as independent conditional statements to check the bounds of the retain IllegalReferenceCountException condition. One of the exceptions also uses the incorrect increment. The same fix was done for AbstractReferenceCounted as 01523e7835.

Modifications:
- Combined independent conditional checks into 1 where possible
- Correct IllegalReferenceCountException with incorrect increment
- Remove the subtract to check for overflow and re-use the addition and check for overflow to remove 1 arithmetic operation (see http://docs.oracle.com/javase/specs/jls/se7/html/jls-15.html#jls-15.18.2)

Result:
AbstractReferenceCountedByteBuf has less independent branch statements and more correct IllegalReferenceCountException. Compilation size of AbstractReferenceCountedByteBuf.retain() is reduced.
2016-08-05 07:25:47 +02:00
Norman Maurer
76a3ea699d [#5629] Ensure direct ByteBuffer are wrapped in as direct ByteBuf.
Motivation:

We need to check if a ByteBuffer is direct via isDirect() to detect if its direct as hasArray() may also return true for a direct ByteBuffer.

See also:
https://docs.oracle.com/javase/8/docs/api/java/nio/ByteBuffer.html#allocateDirect-int-

Modifications:

Add isDirect() check.

Result:

Correct wrap a direct ByteBuffer in all cases.
2016-08-05 07:16:46 +02:00
Dmitriy Dumanskiy
f769bb3376 Cleanup : removed unused empty arrays and simplified initialization 2016-08-02 07:03:59 +02:00
Scott Mitchell
82b22d6f11 findNextPositivePowerOfTwo out of bounds
Motivation:
Some usages of findNextPositivePowerOfTwo assume that bounds checking is taken care of by this method. However bounds checking is not taken care of by findNextPositivePowerOfTwo and instead assert statements are used to imply the caller has checked the bounds. This can lead to unexpected non power of 2 return values if the caller is not careful and thus invalidate any logic which depends upon a power of 2.

Modifications:
- Add a safeFindNextPositivePowerOfTwo method which will do runtime bounds checks and always return a power of 2

Result:
Fixes https://github.com/netty/netty/issues/5601
2016-08-01 19:52:13 -07:00
Norman Maurer
e85d437398 [#5597] Not try to double release empty buffer in Unpooled.wrappedBuffer(...)
Motivation:

When Unpooled.wrappedBuffer(...) is called with an array of ByteBuf with length >= 2 and the first ByteBuf is not readable it will result in double releasing of these empty buffers when release() is called on the returned buffer.

Modifications:

- Ensure we only wrap readable buffers.
- Add unit test

Result:

No double release of buffers.
2016-07-30 21:16:44 +02:00
Scott Mitchell
82b617dfe9 retainSlice() unwrap ByteBuf
Motivation:
retainSlice() currently does not unwrap the ByteBuf when creating the ByteBuf wrapper. This effectivley forms a linked list of ByteBuf when it is only necessary to maintain a reference to the unwrapped ByteBuf.

Modifications:
- retainSlice() and retainDuplicate() variants should only maintain a reference to the unwrapped ByteBuf
- create new unit tests which generally verify the retainSlice() behavior
- Remove unecessary generic arguments from AbstractPooledDerivedByteBuf
- Remove unecessary int length member variable from the unpooled sliced ByteBuf implementation
- Rename the unpooled sliced/derived ByteBuf to include Unpooled in their name to be more consistent with the Pooled variants

Result:
Fixes https://github.com/netty/netty/issues/5582
2016-07-29 11:16:44 -07:00
Norman Maurer
d92c5f5f5b Introduce allocation / pooling ratio in Recycler
Motivation:

At the moment the Recyler is very sensitive to allocation bursts which means that if there is a need for X objects for only one time these will most likely end up in the Recycler and sit there forever as the normal workload only need a subset of this number.

Modifications:

Add a ratio which sets how many objects should be pooled for each new allocation. This allows to slowly increase the number of objects in the Recycler while not be to sensitive for bursts.

Result:

Less unused objects in the Recycler if allocation rate sometimes bursts.
2016-07-29 15:20:39 +02:00
Norman Maurer
cb7cf4491c [maven-release-plugin] prepare for next development iteration 2016-07-27 13:29:56 +02:00
Norman Maurer
9466b32d05 [maven-release-plugin] prepare release netty-4.1.4.Final 2016-07-27 13:16:59 +02:00
Scott Mitchell
5f4f295600 Correctly return a retained slice if called SwappedByteBuf.retainedSlice(...)
Motivation:

SwappedByteBuf.retainedSlice(...) did not return a retained buffer.

Modifications:

Correctly delegate to retainedSlice(..) calls.

Result:

Correctly return retained slice.
2016-07-27 12:36:37 +02:00
Norman Maurer
047f6aed28 [maven-release-plugin] prepare for next development iteration 2016-07-15 09:09:13 +02:00
Norman Maurer
b2adea87a0 [maven-release-plugin] prepare release netty-4.1.3.Final 2016-07-15 09:08:53 +02:00
Norman Maurer
771cfaec22 [#5520] Correctly include all PoolSubpage metrics
Motivation:

Because of a bug we missed to include the first PoolSubpage when collection metrics.

Modifications:

- Correctly include all subpages
- Add unit test

Result:

Correctly include all subpages
2016-07-13 21:33:06 +02:00
Norman Maurer
4676a2271c [maven-release-plugin] prepare for next development iteration 2016-07-01 10:33:32 +02:00
Norman Maurer
ad270c02b9 [maven-release-plugin] prepare release netty-4.1.2.Final 2016-07-01 09:07:40 +02:00
Kevin Herron
ee3c8e0580 Test that CompositeByteBuf releases its components
Motivation:

In order to prevent a regression, add test case for a bug that caused a CompositeByteBuf to not release its components.

Modifications:

Add a test case that asserts a CompositeByteBuf's component buffers have indeed been released.

Result:

AbstractCompositeByteBuf gains a test case that will prevent future regressions.
2016-06-27 19:21:12 +02:00
agonigberg
3288cacf8d Pluggable resource leak detector
Allow users of Netty to plug in their own leak detector for the purpose
of instrumentation.

Motivation:

We are rolling out a large Netty deployment and want to be able to
track the amount of leaks we're seeing in production via custom
instrumentation. In order to achieve this today, I had to plug in a
custom `ByteBufAllocator` into the bootstrap and have it initialize a
custom `ResourceLeakDetector`. Due to these classes mostly being marked
`final` or having private or static methods, a lot of the code had to
be copy-pasted and it's quite ugly.

Modifications:

* I've added a static loader method for the `ResourceLeakDetector` in
`AbstractByteBuf` that tries to instantiate the class passed in via the
`-Dio.netty.customResourceLeakDetector`, otherwise falling back to the
default one.
* I've modified `ResourceLeakDetector` to be non-final and to have the
reporting broken out in to methods that can be overridden.

Result:

You can instrument leaks in your application by just adding something
like the following:

```java
public class InstrumentedResourceLeakDetector<T> extends
ResourceLeakDetector<T> {

    @Monitor("InstanceLeakCounter")
    private final AtomicInteger instancesLeakCounter;

    @Monitor("LeakCounter")
    private final AtomicInteger leakCounter;

    public InstrumentedResourceLeakDetector(Class<T> resource) {
        super(resource);
        this.instancesLeakCounter = new AtomicInteger();
        this.leakCounter = new AtomicInteger();
    }

    @Override
    protected void reportTracedLeak(String records) {
        super.reportTracedLeak(records);
        leakCounter.incrementAndGet();
    }

    @Override
    protected void reportUntracedLeak() {
        super.reportUntracedLeak();
        leakCounter.incrementAndGet();
    }

    @Override
    protected void reportInstancesLeak() {
        super.reportInstancesLeak();
        instancesLeakCounter.incrementAndGet();
    }
}
```
2016-06-20 11:14:44 +02:00
Xiaoyan Lin
9602535b7d Added isText to validate if a ByteBuf is compliant with the specified charset.
Motivation:

See #82.

Modifications:

- Added `isText` to validate if the given ByteBuf is compliant with the specified charset.
- Optimized for UTF-8 and ASCII. For other cases, `CharsetDecoder.decoder` is used.

Result:

Users can validate ByteBuf with given charset.
2016-06-20 07:32:05 +02:00
Norman Maurer
4dec7f11b7 [maven-release-plugin] prepare for next development iteration 2016-06-07 18:52:34 +02:00