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Saves around 1% of instructions on crypto.js
Change-Id: Iccef08b204e6e752d827242baf156efd9a4d58a7
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
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Change-Id: Ief43d899e47cbfd865458a38aab8c466f6c2c76f
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
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Change-Id: Ib044be254dbb41bd9fb4a6e0baa3bd3c007e6a2a
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
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The JS stack allocation initializes the contents, but in most cases the
caller will immediately store a value in that stack slot. When the
allocation code is inlined, the compiler can use dead store elimination
to remove the unnecessary initialization code.
Change-Id: I0495417adc7c1c8764f845032611bd506a8b7df9
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
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Conflicts:
tests/auto/quick/qquicktextedit/BLACKLIST
Change-Id: I0b9e5bea5da5d2666887c202e62d889b4aa56900
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Conflicts:
src/quick/items/qquickwindow.cpp
tests/auto/quick/qquicktext/BLACKLIST
tests/auto/quick/qquicktextedit/BLACKLIST
Change-Id: I8bd68b0b5e853b7908791d2cbddd18dd527c76ae
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After commit 2afb54fb51091765f79548b0b057795bc3c6eb38,
Primitive::undefinedValue() uses setM() to clear out all bits.
Previously that code was #ifndef'ed out for the bootstrap build, but now
that we can do the correct boxing in host builds (as we know the pointer
size), we can re-enable setM() in bootstrap builds and fix this crash
that was a Q_UNREACHABLE() assertion.
Change-Id: I49036792c06c9a17272aba65261ab8f32beb2ad8
Task-number: QTBUG-56658
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
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Change-Id: I175b27337b534c0b8f46a4a792d2c43cde73ffc4
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These two were mixed, but have completely different values.
Task-number: QTBUG-56471
Change-Id: Ifbf6da3032335ea89bfbc3acde17f64a571b9dc0
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
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We can't both invert offset position and inter-value positions of tag
and value.
This patch changes 32-bit big-endian to use the same order inside
the tag/value but just at different offsets. This also make it
compatible with how we use it with doubles.
This fixes value/tag reads on 32-bit big-endian and offsets on 64-bit.
Task-number: QTBUG-56271
Change-Id: I95cf792c29ac3f42a4018ce1f115193c143a0df0
(cherry picked from commit 2a658344397729450f869138bf77e063a0a6166b)
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>
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Conflicts:
examples/quick/quickwidgets/quickwidget/main.cpp
src/qml/jsruntime/qv4jsonobject.cpp
src/qml/jsruntime/qv4qobjectwrapper.cpp
src/qml/jsruntime/qv4qobjectwrapper_p.h
src/qml/qml/qqmlengine.cpp
src/qml/qml/qqmlpropertycache.cpp
src/qml/qml/qqmlpropertycache_p.h
src/quick/items/qquickanimatedsprite.cpp
src/quick/items/qquickitem.cpp
src/quick/items/qquickitem.h
src/quick/items/qquickitem_p.h
src/quick/items/qquickview_p.h
src/quick/scenegraph/qsgcontext.cpp
src/quick/scenegraph/qsgdefaultrendercontext.cpp
Change-Id: I172c6fbff97208f21ed4c8b6db3d1747a889f22b
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Conflicts:
tests/auto/quick/qquicktext/tst_qquicktext.cpp
Change-Id: I241cd418bb7e7b95e0a0a2ee4c465d48be2a5582
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This allows for the OS to use 49 address bits. It also maps JS Undefined
to the C++ nullptr on 64bit.
Task-number: QTBUG-54822
Change-Id: I7cc90620f499be1506a61aac77d72d067308838c
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
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GCC6 might dead-store-eliminate out our secret write to Base::mmdata,
because it expects all memory content to be "undefined" before
constructor calls. Clang might take the same approach if the constructor
of Heap::Object is removed.
By making these structs trivial, it also makes them memcpy-able.
Change-Id: I055b2ad28311b997fbe059849ebda4d5894eaa9b
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
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This change also adds a check to the d() calls for Managed, verifies
that the object has been initialized. This is only done for debug
builds.
To prevent other code from tripping the check, a number of other classes
are either marked as trivial, or do initialization in the constructors.
Because of template function changes in them memory manager (those now
call init() instead of in-place new), String has an extra parameter
to force it to temporarily use an old/unmodified template function.
Change-Id: I8c35161ce7680835d830638b6d21498c5129b02b
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
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Conflicts:
src/qml/qml/qqmltypeloader.cpp
Change-Id: I07647700fc86764c95a5ef95c568e700a70fe45f
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We can't both invert offset position and inter-value positions of tag
and value.
This patch changes 32-bit big-endian to use the same order inside
the tag/value but just at different offsets. This also make it
compatible with how we use it with doubles.
This fixes value/tag reads on 32-bit big-endian and offsets on 64-bit.
Change-Id: I95cf792c29ac3f42a4018ce1f115193c143a0df0
Reviewed-by: Erik Verbruggen <erik.verbruggen@qt.io>
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Conflicts:
src/quick/items/qquickshadereffect.cpp
5.7 had a bug-fix in code dev has replaced wholesale.
src/quick/items/qquickwindow.cpp
src/quick/items/qquickwindow_p.h
One side changed a method's signature; the other side renamed a method
declared adjacent to it and changed some code using it, moving some
from the public class to its private partner.
tests/auto/qml/debugger/qqmlprofilerservice/tst_qqmlprofilerservice.cpp
One side added a blank line before a comment the other re-wrote.
Kept the re-write, killed the stray blank.
.qmake.conf
Ignore 5.7's change to MODULE_VERSION.
src/qml/compiler/qqmltypecompiler.cpp
src/qml/compiler/qqmlpropertyvalidator.cpp
5.7 changed code in the former that dev moved to the latter.
Reflect 5.7's changes there, adapted to dev's form.
src/qml/qml/qqmlobjectcreator.cpp
One side added new QVariant types; the other changed how it handled
each type of QVariant (without git seeing any conflict); adapted the
new stanzas to work the same as the transformed ones.
tests/manual/v4/test262
dev had a broken sha1 for it; so used 5.7's 9741ac4655808ac46c127e3d1d8ba3d27ada618e
Change-Id: I1fbe2255b97d6ef405cdd1d0cea7fab8dc351d6f
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Conflicts:
tests/auto/qml/qqmllanguage/tst_qqmllanguage.cpp
tests/auto/quick/qquickitem/tst_qquickitem.cpp
Change-Id: If261f8eea84dfa5944bb55de999d1f70aba528fd
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This change disables the BIG_ENDIAN 32 bits words mangling in 64 bits
machines (where the words are 64 bits long); this would otherwise result
in a segfault.
Task-number: QTBUG-54717
Change-Id: I6b5ab6f213880b030795185c05e609d290168901
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
Reviewed-by: Timo Jyrinki <timo.jyrinki@iki.fi>
Reviewed-by: Erik Verbruggen <erik.verbruggen@qt.io>
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Conflicts:
src/quick/items/qquickflickable_p_p.h
src/quick/items/qquickpathview_p_p.h
tests/auto/qml/qqmltypeloader/tst_qqmltypeloader.cpp
Change-Id: I77664a095d8a203e07a021c9d5953e02b8b99a1e
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Conflicts:
src/qml/jit/qv4targetplatform_p.h
src/quick/accessible/qaccessiblequickitem_p.h
Change-Id: Ic95075a5fad81ec997a61561bd65979dfa3b9d4d
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All setters now store tags, so no-one can play loosy-goosy with the
boxed values (and accidentally forget to "tag" a value, resulting in
random garbage).
Change-Id: Ia0b78aa038d3ff46d5292b14bd593de310da16a0
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
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All those type conversions assumed that the content of a Value was
either the requested type, or 0 (zero, a null pointer). Now, attempting
to convert e.g. undefined to a string will fail, instead of returning a
weird address.
Change-Id: I0f567cdcc9cc9728d019f17693f4a6007394a9c6
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
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Conflicts:
src/plugins/qmltooling/qmldbg_profiler/qqmlprofilerservice.cpp
src/qml/jsruntime/qv4engine.cpp
src/qml/jsruntime/qv4engine_p.h
Change-Id: I89ffccd699bee675732758d039e22224b275d60d
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The pointer size is now correctly set in qprocessordetection.h even for
bootstrapped builds.
Change-Id: I7e6338336dd6468ead24ffff1410d4ba8b1cbdad
Reviewed-by: Simon Hausmann <simon.hausmann@theqtcompany.com>
Reviewed-by: Erik Verbruggen <erik.verbruggen@qt.io>
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Change-Id: Icfa1d61fcc286c3418d4a625de11d2191336fa60
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We use 64bit value encoding there, so gcc complained that memcpy would
write 8 bytes to a 4 byte pointer value.
Change-Id: Ib44372fb0e4bbacf0279930f7f5fcf4bbb5d48bf
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@theqtcompany.com>
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From Qt 5.7 -> LGPL v2.1 isn't an option anymore, see
http://blog.qt.io/blog/2016/01/13/new-agreement-with-the-kde-free-qt-foundation/
Updated license headers to use new LGPL header instead of LGPL21 one
(in those files which will be under LGPL v3)
Change-Id: Ic36f1a0a1436fe6ac6eeca8c2375a79857e9cb12
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>
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All identifiers starting with an underscore and a capital letter are
reserved to the compiler and must never be used by the user code. Try to
find a better name or, in the worst case, move the underscore to the
last position in these identifiers.
See commit cf63c63d558227fdbef09699c261560e7474f5ea in qtbase for a case
of such an identifier causing a build breakage when the compiler began
treating it specially (it was _Nullable).
Change-Id: I1d0f78915b5942aab07cffff140f9f39c29f0fdf
Reviewed-by: Erik Verbruggen <erik.verbruggen@theqtcompany.com>
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Task-number: QTBUG-48594
Change-Id: Ifc207938de7f0c8995fc712df92665f222612647
Reviewed-by: Alan Alpert <aalpert@blackberry.com>
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Commit 92836d052efb6d8073136e8507083f93fb60bb80 fixed the type punning
but introduced undefined behavior on 32-bit systems. Detected by GCC 5.2
qv4value_p.h:96:55: error: ‘v.Qti386::QV4::Value::_val’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
qv4scopedvalue_p.h:199:15: note: ‘v.Qti386::QV4::Value::_val’ was declared here
Trace: starting at qv4scopedvalue_p.h:199
Value v;
v = o;
=>
Value &operator=(Heap::Base *o) {
setM(o);
=>
Q_ALWAYS_INLINE void setM(Heap::Base *b) { quint32 v; memcpy(&v, &b,
4); setValue(v); }
=>
Q_ALWAYS_INLINE void setValue(quint32 v) { setTagValue(tag(), v); }
=>
Q_ALWAYS_INLINE quint32 tag() const { return _val >> 32; }
The call to tag() reads from _val before it is initialized. Up until
C++11, uninitialized variables simply had an indeterminate value.
Starting with C++14 (see N3914, resolution of DR1787), reading that
variable not as an unsigned char has undefined behavior. See 8.5
[dcl.init] p12:
... When storage for an object with automatic or dynamic storage
duration is obtained, the object has an indeterminate value, and if no
initialization is performed for the object, that object retains an
indeterminate value until that value is replaced (5.18). [...] If an
indeterminate value is produced by an evaluation, the behavior is
undefined except in the following cases:
[list of cases that use unsigned char]
Change-Id: I42e7ef1a481840699a8dffff1406852f2badabca
Reviewed-by: Ulf Hermann <ulf.hermann@theqtcompany.com>
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Conflicts:
src/qml/debugger/qv4debugservice.cpp
src/qml/jsruntime/qv4value_inl_p.h
src/qml/jsruntime/qv4value_p.h
src/qml/memory/qv4mm.cpp
src/qml/memory/qv4mm_p.h
src/qml/qml/qqmlnotifier_p.h
src/qml/qml/qqmlproperty.cpp
src/quick/items/qquickflickable.cpp
src/quick/items/qquicktextedit.cpp
tests/auto/quick/qquickwindow/BLACKLIST
The extra changes in qqmlbinding.cpp are ported from changes to
qqmlproperty.cpp that occurred in parallel with writeBinding() being
moved to qqmlbinding.cpp.
Change-Id: I16d1920abf448c29a01822256f52153651a56356
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When building on a 64-bit host targeting a 32-bit architecture, we would
use QT_POINTER_SIZE == 4 from qconfig.h, which is unfortunately shared.
However on 64-bit hosts the 32-bit encoding appears to result in gcc/clang
to miscompile simple QV4::Value uses - when optimizations are enabled.
As a workaround, let's use 64-bit encoding in all host scenarios.
Change-Id: I000cf13abcc9240c931191d6361b6dee578cb5d4
Task-number: QTBUG-45364
Reviewed-by: Erik Verbruggen <erik.verbruggen@theqtcompany.com>
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Change-Id: Ie37194a8a02dd43cdcf2b97670fffe21da04cbf3
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>
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This is required, so we can safely access the vtable even while
we're marking objects during GC.
Change-Id: I34f56b61b4bca0d0742faf607eb5ab8b2c30685e
Reviewed-by: Simon Hausmann <simon.hausmann@theqtcompany.com>
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Step one in moving it next to Q_NEVER_INLINE in qglobal_p.h.
Change-Id: Iedecf8de2531334cf3cf8cd5ae4c7b19f2d7736b
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>
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The union in QV4::Value is used to do type punning. In C++, this is
compiler-defined behavior. For example, Clang and GCC will try to detect
it and try to do the proper thing. However, it can play havoc with Alias
Analysis, and it is not guaranteed that some Undefined Behavior (or
Compiler depenedent behavior) might occur.
The really problematic part is the struct inside the union: depending on
the calling convention and the register size, it results in some
exciting code. For example, the AMD64 ABI specifies that a struct of two
values of INTEGER class can be passed in separate registers when doing a
function call. Now, if the AA in the compiler looses track of the fact
that the tag overlaps with the double, you might get:
ecx := someTag
... conditional jumps
double_case:
rdx := xorredDoubleValue
callq someWhere
If the someWhere function checks for the tag first, mayhem ensues: the
double value in rdx does not overwrite the tag that is passed in ecx.
Changing the code to do reinterpret_cast<>s might also give problems
on 32bit architectures, because there is a double, whose size is not the
same as the size of the tag, which could confuse AA.
So, to fix this, the following is changed:
- only have a quint64 field in the QV4::Value, which has the added
benefit that it's very clear for the compiler that it's a POD
- as memcpy is the only approved way to ensure bit-by-bit "conversion"
between types (esp. FP<->non-FP types), change all conversions to use
memcpy. Use bitops (shift/and/or) for anything else.
- only use accessor functions for non-quint64 values
As any modern compiler has memcpy as an intrinsic, the call will be
replaced with one or a few move instructions. The accessor functions
also get inlined, the bitops get optimized, so in all cases the compiler
can generate the most compact code possible.
This patch obsoletes f558bc48585c69de36151248c969a484a969ebb4 (which had
the exact aliassing problem of the double and the tag as described
above).
Change-Id: I60a39d8564be5ce6106403a56a8de90943217006
Reviewed-by: Ulf Hermann <ulf.hermann@theqtcompany.com>
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This is a cleaner separation and further reduces include dependencies
in the definitions of our basic data structured.
Change-Id: I18aa86cdea0c0dfbc16075d4d617af97e638811e
Reviewed-by: Simon Hausmann <simon.hausmann@theqtcompany.com>
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Change-Id: Ie48dc8f95daa4738e690902b5d33010afa7b974f
Reviewed-by: Simon Hausmann <simon.hausmann@theqtcompany.com>
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Conflicts:
src/qml/qml/qqmlbinding.cpp
src/qml/jsruntime/qv4arraybuffer.cpp
src/qml/jsruntime/qv4functionobject.cpp
Change-Id: Ic752e9dfd69b282093651c9234c110a49762f06d
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Change-Id: Ia00949757a6f47babc1748f27e32a9644d6cc608
Reviewed-by: Simon Hausmann <simon.hausmann@theqtcompany.com>
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Change-Id: If8fe9907ad1cc479f7615ceabd419e74b4da0d11
Reviewed-by: Simon Hausmann <simon.hausmann@theqtcompany.com>
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Change-Id: Ib4858376dc0ec57fa473c80696abc66a570c90ec
Reviewed-by: Simon Hausmann <simon.hausmann@theqtcompany.com>
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Get rid of Value::asObject(), and pass const Managed pointers
into some more vtable methods.
Change-Id: Ia4f427d5fd8868f77b4015d1ce5424d32bfc2115
Reviewed-by: Simon Hausmann <simon.hausmann@theqtcompany.com>
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Change-Id: I853417fdf1cc339f7d43a006c20e1626b6bfb288
Reviewed-by: Simon Hausmann <simon.hausmann@theqtcompany.com>
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Change-Id: Ie6355beabce3de65c215514d9dc98294b5980c9d
Reviewed-by: Simon Hausmann <simon.hausmann@theqtcompany.com>
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Change-Id: Iad3afd00d2fdbd04efa4f3b841f11269ab496826
Reviewed-by: Simon Hausmann <simon.hausmann@theqtcompany.com>
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Change-Id: I71816a784b5175f600c5a870318b16c0d84c42fb
Reviewed-by: Simon Hausmann <simon.hausmann@theqtcompany.com>
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The get and getIndexed vtable methods should take a const Managed
pointer. Start cleaning up the asFoo() methods in Value and Managed
by removing asArrayObject() and asErrorObject().
Change-Id: Ibd49bf20773ef84c15785b7ac37a7bc9fd4745d5
Reviewed-by: Simon Hausmann <simon.hausmann@theqtcompany.com>
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