Saves ~600B in text size on optimized GCC 9.1 Linux AMD64 builds.
Change-Id: I12f4e7c8d28af9549b481859bc96a155aeb6f15c
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Semi-automated, just needed ~20 manual fixes:
$ find \( -iname \*.cpp -or -iname \*.h \) -exec perl -pe 's/(\.|->)load\(\)/$1loadRelaxed\(\)/g' -i \{\} +
$ find \( -iname \*.cpp -or -iname \*.h \) -exec perl -pe 's/(\.|->)store\(/$1storeRelaxed\(/g' -i \{\} +
It can be easily improved (e.g. for store check that there are no commas
after the opening parens). The most common offender is QLibrary::load,
and some code using std::atomic directly.
Change-Id: I07c38a3c8ed32c924ef4999e85c7e45cf48f0f6c
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
... instead of qPrintable(), %s, and explicit qt_error_string().
Saves 2KiB in text size on optimized Linux AMD64 GCC 9.1 builds.
Change-Id: I98b6717da1ed1b678f01167d704a96f10da47966
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
MinGW doesn't have a debug and a release version of the CRT like
Visual C++ does. Disabling the check would allow distribution
only of a Release build of Qt.
Change-Id: Iecfa753217af96ca74091cd1d47400632629abdb
Reviewed-by: Jörg Bornemann <joerg.bornemann@qt.io>
This enables overriding the macro so that it translates
to 'None' in the Qt for Python context.
Change-Id: Ib3cecf57eeb0405a1929309b71e9f012a07f11cf
Reviewed-by: Christian Ehrlicher <ch.ehrlicher@gmx.de>
As the non prefixed variants are deprecated
Change-Id: I2ba09d71b9cea5203b54297a3f2332e6d44fedcf
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
Usually, when you load a plugin, you don't want to load just any plugin
that fulfills a given interface, but rather a specific one. When loading
dynamic plugins you can differentiate the plugins by file name. This
doesn't work in the static case, and file names are also separate from
the plugin metadata shipped inside the plugin files.
To solve this problem, different hacks have been developed in various
places. QML extension plugins add a special property "uri" via the -M
option of moc, QML debug plugins expect you to add a json file with
an array of "Keys", Qt Creator plugins have a "Name" in their json
files, etc.
By allowing the identifier for the plugin to be specified inline with
the metadata declaration we can make many of the above workarounds
obsolete and provide a clean way for users to find their plugins.
Task-number: QTBUG-74775
Change-Id: Ie2af16c49d4c5aa5a77fab0fae1e0a4449bd7a39
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
In preparation of Qt6 move away from pre-C++11 macros.
Change-Id: I44126693c20c18eca5620caab4f7e746218e0ce3
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Replace null and '\c nullptr' with \nullptr in the documentation.
Change-Id: Ib9e0cfc2eb2830b213e6523773603d56180b0998
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
First of all, we were using the wrong size variable: instead of the size
of the section, found in the section header, we were using the size of
each section entry in the section table. Since that's usually smaller,
we weren't hitting a problem.
Second, if the string table is the last thing in the file and there's
nothing else after it, not even padding, then offset + section_size can
be equal to the file size. In fact, the .shstrtab section is usually the
last one, as it contains the section names themselves, so it stands to
reason that it's the second to last thing written.
For generic linkers, the last data in the file is the section table
itself, so usually the file is larger by at least a kilobyte, which is
why we haven't hit this bug. It could only manifest as deciding that
certain specially-crafted but valid ELF files were invalid. I can't
think of a way to trick it into thinking an invalid ELF is valid.
That's another reason why this code needs to be rewritten with more
modern coding styles and actually using <elf.h>
Fixes: QTBUG-71443
Change-Id: I1bd327aeaf73421a8ec5fffd156162f2df5557b8
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
This update eliminates ALL parsing errors when clang parses the
Qt headers to build the precompiled header qdoc needs. These errors
are often cases where an old use of Q_QDOC no longer works because
clang sees the enclosed fake declarations as erroneous.
In a few cases, clang reported errors because two dummy function
declartations under the Q_CLANG_QDOC guard were indistinguishable,
so one of them was removed, and the documentation was patched
accordingly.
Using the macro Q_DECLARE_INTERFACE(...) causes clang to report errors
because the class parametewr is abstract. These uses of the macro are
not needed, so they are removed with #ifndef Q_CLANG_QDOC.
Some declarations of default GL types that had been provided for qdoc
were no longer needed, so they are removed.
Now there are some member function signatures in QDBusPendingReply
and QDBusPendingCall that have very long template clauses and qualifiers
in their signatures. These unwieldy signatures will be unnecessary in the
documentation and will look bad there, but for now they are correct. The
ultimate solution will be to add a metacommand to qdoc, something like
\simplify-signature to tell qdoc to generate the documentation for these
member functions without the long template caluses and qualifiers.
Change-Id: I012cf17a544fbba2ebc71002f31bdc865119bb8e
Reviewed-by: Paul Wicking <paul.wicking@qt.io>
Reviewed-by: Topi Reiniö <topi.reinio@qt.io>
Reviewed-by: Martin Smith <martin.smith@qt.io>
The source is an ElfXX_Off, which is an unsigned 32- or 64-bit. That
means any section bigger than 2 GB would cause an overflow when we
assigned in
m_stringTableFileOffset = strtab.offset;
Change-Id: Ib47c56818178458a88b4fffd15546bd47a89894e
Fixes: QTBUG-70560
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
Android doesn't like nor use RTLD_NODELETE
Tasnk-number: QTBUG-64654
Change-Id: I2d884bbf22a681cca592942eba84ba97327ba974
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>
...not just the debug flag. The information is saved outside of the CBOR
map for two reasons:
1) removing the hack that depended on how QCborStreamWriter and
TinyCBOR internally work, allowing for the extra parameter to be
written directly. We wouldn't be able to use that hack anyway and would
have needed a further, uglier hack to encode a byte whose value we
don't know.
2) outside the map, this information can be parsed more quickly and
then we can discard any plugins we shouldn't actually load.
Since we're doing this for a flag, I decided to move the Qt version
there too for reason #2.
Change-Id: I61ecce6b1324410bbab4fffd153d4e5fc696d19e
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>
In preparation for Qt 6 deprecating the binary JSON format. Also reduces
the size of the metadata a little: for the xcb platform plugin, it went
down from 264 bytes to 138; for the jpeg image plugin, it went from 320
to 135.
I've had to change the signature so older versions of Qt won't try to
parse the CBOR data as Binary JSON. Unfortunately, before QJsonDocument
could get a chance to reject it, qJsonFromRawLibraryMetaData() needed to
allocate memory and that causes crashes with Qt < 5.11.2.
Change-Id: Ieb48f7c0dd0e4e0fb35efffd153bee34e16ce347
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
Replace by reinterpret_cast or const_cast, respectively.
Use auto when initializing a variable to fix Clang warnings
about repeating the type name, do minor tidying along the way,
and a few conversions of 0 or NULL to nullptr.
Change-Id: Ieb271a87ddcf064f536e1ff05d23b1e688b1b56a
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
We want to store the metadata size and get it from the plugin in Qt 6.
Change-Id: Ieb48f7c0dd0e4e0fb35efffd153bebc2914d9a3c
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Eight bytes into the Binary JSON header there's a 32-bit little-endian
size, which qJsonFromRawLibraryMetaData uses to determine the size of
the stored metadata. That value is passed as a size to QByteArray, which
means certain values could cause crashes due to being too big or via
sign-extension in 64-bit.
[ChangeLog][QtCore][QPluginLoader] Fixed an issue that could cause a
crash when certain damaged or corrupt plugin files were scanned.
Change-Id: I117816bf0f5e469b8d34fffd153dc5425cec39a7
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
GCC5.4 generates incorrect code.
The QString object which is passed by value to f-lambda,
has been corrupted by the time this lambda returns.
Accessing this object causes memory corruption.
The same can be reproduced with std::list and std::string
Task-number: QTBUG-69394
Change-Id: I22522d2ddd1d5226de0aff378133d18391e370de
Reviewed-by: Gatis Paeglis <gatis.paeglis@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
I don't know why Arvid subtracted 1 when he wrote this code. But it was
wrong. Fortunately, the section size was not used afterwards, but the next
commit will.
Change-Id: I117816bf0f5e469b8d34fffd153dc8383b00b94a
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
When using actual memory allocation, limit to 64 MB, not the full file
size. On most systems, the memory map technique will work, so this won't
even be tried. In any case, we don't need the fix for the OOM situation
that was applied in commit e211ab76d7.
As for the memory mapping technique, this commit limits the allocation
to reasonable values given the virtual memory addressing space. Half a
gigabyte is probably acceptable on 32-bit systems, where there should be
a contiguous space for the OS to allocate the file in. This commit also
fixes an overflow when converting from qint64 of the file size to ulong
(32-bit on 32-bit platforms and on Windows).
For 64-bit systems, we currently limit to 1 TB.
Change-Id: I117816bf0f5e469b8d34fffd153dc1705a8eedc4
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
Libraries are placed in a subdir "haswell/" of the main library dir,
whereas plugins are simply named with ".avx2" appended to the plugin
name (plugin.so.avx2). The "haswell/" library directory suffix is a
convention found in glibc since version 2.26, whereas the ".avx2" and
".avx512" suffixes are a convention found in the Clear Linux OS for
Intel Architecture.
This patch implements this for all Unix OSes, except for Darwin, where
the fat file format already has a sub-architecture for Haswell
(x86_64h).
We could also implement the "sse2/" subdir search for libraries, but I
don't think it's worth the cost in 2018.
Change-Id: Iff4151c519c144d580c4fffd1539fe5ee9a4d7b1
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Use CamelCase, like the API they're tracing.
Change-Id: Ie718ab624d17c9186bcf05cc1276c8eccad7f454
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
Reviewed-by: Rafael Roquetto <rafael.roquetto@kdab.com>
RCC generates code that registers resources automatically on program
startup via global constructors. When linking statically and nothing
references the symbols in the .o file compiled from the RCC generated
code, then the linker will discard the embedded resources and they will
not get initialized. That is why for static linking it is necessary to
explicitly initialize resources using the Q_INIT_RESOURCE macro.
We can avoid the need for the explicit initialization in the context of
plugins that are statically linked into the application. resources.prf
can generate a .cpp file with a helper function that contains all the
Q_INIT_RESOURCE calls for all resources in the plugin. That helper
function in turn is injected into the plugin entry point, which in turn
is guaranteed to be included in the final binary.
Change-Id: If1abf9c85ef92935020af073b989c58c1ae6ca63
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
When Qt is configured for both debug and release, and frameworks are
enabled, we produce two dynamic libraries inside each framework, eg:
QtCore.framework/QtCore
QtCore.framework/QtCore_debug
When building an executable against these frameworks, we pass -framework
QtCore, and the resulting executable will have its LC_LOAD_DYLIB load
commands pointing to e.g.:
@rpath/QtCore.framework/Versions/5/QtCore
When running the executable, the dynamic loader will load the dynamic
library dependencies based on these load commands.
By setting the DYLD_IMAGE_SUFFIX environment variable at runtime to
'_debug', the dynamic loader will prefer the debug versions of each
library inside the frameworks.
Unfortunately the use of an environment variable to choose debug or
release versions leaves room for mismatches between the executable
and the libraries that are loaded. An executable built in debug
mode will at runtime pick up the release versions of the Qt libraries
unless the DYLD_IMAGE_SUFFIX has also been set to match the build
configuration of the executable.
This results in confusing situations such as building your application
in debug mode, and then stepping into Qt code but not getting any
symbols. Qt Creator has an option to run the application with
DYLD_IMAGE_SUFFIX set, but this is not enabled by default due
to the startup cost of loading the Qt debug libraries.
More critically, it results in tests failing when the tests are using
QTest::ignoreMessage to ignore warnings produced by Qt, and these
calls are ifdefed (correctly) inside QT_NO_DEBUG, as the test
(built in debug mode) will then expect warnings from Qt, but those
warnings are not emittet, as the test is run against the release
version of the Qt libraries.
To mitigate this mismatch, we now link the Qt frameworks using
an explicit suffix, just like we would for no-framework builds
on macOS, for debug and release builds on Windows, and for
normal builds on other Unixes, leaving the dependency chain
for the application predictable:
@rpath/QtCore.framework/Versions/5/QtCore_debug
This also conceptually matches how Xcode builds applications and
frameworks, where it never relies on DYLD_IMAGE_SUFFIX, and instead
uses two separate build directories, one for each configuration.
The change means that Qt Creator will always load the Qt debug
libraries if the application is built in debug mode. For Qt
development this is a good thing, as you expect to be able to
step into Qt code. For our users, the added startup cost can
be mitigated by shipping our binary packages as release-only,
but with separate debug info enabled.
Change-Id: Ib9f1f2dab90ed00b9fb011200e3a69c71955e399
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>
The only mkspecs that enabled QT_HPUX_LD were removed in ab44ac021d.
Change-Id: I9f27f0b487b69c11d19ba76801e3926b7894e6e7
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>
Conflicts:
src/corelib/tools/qvarlengtharray.qdoc
src/corelib/tools/qvector.qdoc
Resolved documentation changes in favor of 017569f702,
which keeps the move overloads along with its const-ref sibling.
Change-Id: I0835b0b3211a418e5e50defc4cf315f0964fab79
While we're at it, add a way to get it without the dashes too. I'm
calling it "id128", as in "128-bit ID", as seen in journald's sd_id128_t
type and the sd_id128_xxx() API.
[ChangeLog][QtCore][QUuid] Added a parameter to both toString() and
toByteArray() to allow controlling the use or not of the braces and
dashes in the string form.
Change-Id: I56b444f9d6274221a3b7fffd150cde706cfc5098
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
This commit introduces minimal support for instrumentation within Qt.
Currently, only LTTNG/Linux and ETW/Windows are supported.
Change-Id: I59b48cf83acf5532a998bb493e6379e9177e14c8
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
A large plugin dll (e.g., one with many MB of debug info) could cause
a 32-bit application to crash when the entire dll file could not fit
within the address space of the process. The code for validating a
plugin library and retrieving metadata from it first tried to map
the entire file in memory, which failed for large files, returning
NULL. In this case, the code tried then to read the entire file via
QFile::readAll(), which deep below caused a bad_alloc exception in
malloc, resulting in the termination of the application. This change
handles the case where the library could not be mapped into memory,
in spite of memory mapping being supported, by reporting the error
and returning false, making the plugin unavailable.
[ChangeLog][QtCore][QPluginLoader] Fixed a bug that would cause the
Qt plugin scanning system to allocate too much memory and possibly
crash the process.
Task-number: QTBUG-65197
Change-Id: I8c7235d86175c9fcd2b87fcb1151570da9b9ebe3
Reviewed-by: Jan Arve Sæther <jan-arve.saether@qt.io>
Clang needs to see a declaration for GUID, or it
will ignore some function declarations that must
be documented.
Change-Id: Ic5d5a88b82c709be7f763a44994b1c077977731a
Reviewed-by: Topi Reiniö <topi.reinio@qt.io>
Marc Mutz
Giuseppe D'Angelo
Friedemann Kleint
Cristian Adam
Qt Forward Merge Bot
Venugopal Shivashankar
Christian Ehrlicher
Lars Knoll
Ulf Hermann
Allan Sandfeld Jensen
Liang Qi
Kevin Funk
Thiago Macieira
Martin Smith
BogDan Vatra
Edward Welbourne
Mikhail Svetkin
Simon Hausmann
Tor Arne Vestbø
Konstantin Tokarev
Rafael Roquetto
Andre de la Rocha