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Fix clang build errors aswell as restructure locking/mutex code for correct
thread safety analysis support.
Reorder make dependencies so that host builds build first as they should
provide better compilation errors than target.
Remove host's use of -fno-omit-frame-pointer as it has no value with correct
use of CFI, which we should have.
Change-Id: I72cea8da9a3757b1a0b3acb4081feccb7c6cef90
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The new root visiting logic has a concept of a root log which holds
new roots which were added since the start of the GC. This is an
optimization since it lets us only mark these newly added roots
during the pause (or pre-cleaning) since the other roots intern table
and class linker roots were marked concurrently at the start of the
GC.
Before (EvaluateAndApplyChanges):
MarkConcurrentRoots: Sum: 605.193ms
After:
MarkConcurrentRoots: Sum: 271.858ms
This should also reduce pathological GC pauses which used to be able
to happen when the intern table or class linker became "dirty"
during the concurrent GC.
Change-Id: I433fab021f2c339d50c35aaae7161a50a0901dec
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Removes the class initialization blacklist and use transaction to detect and
revert class initialization attempting to invoke native method. This only
concerns class initialization happening at compilation time when generating an
image (like boot.art for the system).
In transactional mode, we log every object's field assignment and array update.
Therefore we're able to abort a transaction to restore values of fields and
array as they were before the transaction starts. We also log changes to the
intern string table so we can restore its state prior to transaction start.
Since transactional mode only happens at compilation time, we don't need to log
all these changes at runtime. In order to reduce the overhead of testing if
transactional mode is on/off, we templatize interfaces of mirror::Object and
mirror::Array, respectively responsible for setting a field and setting an
array element.
For various reasons, we skip some specific fields from transaction:
- Object's class and array's length must remain unchanged so garbage collector
can compute object's size.
- Immutable fields only set during class loading: list of fields, method,
dex caches, vtables, ... as all classes have been loaded and verified before a
transaction occurs.
- Object's monitor for performance reason.
Before generating the image, we browse the heap to collect objects that need to
be written into it. Since the heap may still holds references to unreachable
objects due to aborted transactions, we trigger one collection at the end of
the class preinitialization phase.
Since the transaction is held by the runtime and all compilation threads share
the same runtime, we need to ensure only one compilation thread has exclusive
access to the runtime. To workaround this issue, we force class initialization
phase to run with only one thread. Note this is only done when generating image
so application compilation is not impacted. This issue will be addressed in a
separate CL.
Bug: 9676614
Change-Id: I221910a9183a5ba6c2b99a277f5a5a68bc69b5f9
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Enables us to pass the root type and thread id to hprof.
Bug: 12680863
Change-Id: I6a0f1f9e3aa8f9b4033d695818ae7ca3460d67cb
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Change-Id: I31e0c05c5e917cf3275296a7f65bd8b78ec9b78b
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Enabled by disallowing new system weaks during the pause and
re-allowing it after the system weaks have been swept. Reduces
GC pause by ~1ms.
Fixes pause regression caused by fix for
Bug: 10626133
Change-Id: If49d33e7ef19cb728ed3cef5187acfa53b9b05d8
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dalvik-dev
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Required for moving collectors.
Change-Id: Ib97ba4a05af1139f8d388077a15e62bcb9534855
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There was a race which caused the class linker / intern table to not
become dirty after adding a root. We now guard the is dirty flag by
the corresponding locks to prevent this from occuring. This was
causing roots to be occasionally missed.
Also fixes the bug where we occasionally scan more cards than
needed.
Bug: 10626133
Change-Id: I0f6e72d92035ff463954d66988ef610ea0df61be
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Bug 10432288.
Find Classes and Strings from dex caches lazily rather than when the image is
loaded.
Make class status changes do notifies when there can be waiters.
For Class lookup there's a pathology if we always search dex caches and
so after 1000 failures move all classes into the class table.
Be consistent in using "const char*" for class linker descriptors as this
most easily agrees with the type in the dex file.
Improve the intern run-test so that it has a case of a literal contained in the
image.
Modify image_test to allow any valid lock word rather than expecting 0, ideally
we wouldn't see inflated monitors but we do due to NotifyAll (see bug 6961405).
Change-Id: Ia9bfa748eeccb9b4498784b97c6823141b1f6db8
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Change-Id: Id7735be1d75bc315733b1773fba45c1deb8ace43
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The runtime, compiler, dex2oat, and oatdump now are in seperate trees
to prevent dependency creep. They can now be individually built
without rebuilding the rest of the art projects. dalvikvm and jdwpspy
were already this way. Builds in the art directory should behave as
before, building everything including tests.
Change-Id: Ic6b1151e5ed0f823c3dd301afd2b13eb2d8feb81
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