The -mno-direct-extern-access tells the compiler and linker that
references to symbols outside this ELF module mustn't be direct and must
instead always go through the GOT or PLT (the PLT can additionally be
disabled with -fno-plt). The ELF protected visibility tells the compiler
and linker that this symbol is present in the dynamic symbol table as an
export, but it cannot be interposed by another ELF module.
This option is required for user code to link properly to Qt, otherwise
they will get linker errors (assuming GNU binutils >= 2.39) or runtime
failures (glibc >= 2.35). Both versions of glibc and binutils are older
than GCC 12, so it's a safe assumption they are in use and downgrading
the toolchain or libc is not supported. Adding this option to the
compilation is assured for CMake and qmake-based projects.
For example, all accessess to QCoreApplication::self in QtCore, after
this change and with GCC 12 are relocation-free and direct:
000000000013ebf0 <QCoreApplicationPrivate::checkInstance(char const*)>:
13ebf0: cmpq $0x0,0x4f73d0(%rip) # 635fc8 <QCoreApplication::self>
13ebf8: setne %al
13ebfb: je a90fe <QCoreApplicationPrivate::checkInstance(char const*) [clone .cold]>
13ec01: ret
Meanwhile, accesses to the same variable in other modules are indirect
via the GOT:
66650: mov 0x876e1(%rip),%rax # edd38 <QCoreApplication::self@Qt_6>
66657: cmpq $0x0,(%rax)
This replaces the -Bsymbolic and -Bsymbolic-functions (broken)
functionality that Qt has been using or attempting to use since ~2006.
See https://gitlab.com/x86-psABIs/x86-64-ABI/-/issues/8#note_606975128
Change-Id: Iad4b0a3e5c06570b9f5f571b26ed564aa0811e47
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
By changing it to unique_ptr.
Pick-to: 6.2 6.3
Change-Id: I91abb69445b537d4c95983ae735341882352b29d
Reviewed-by: Marc Mutz <marc.mutz@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Browsers like Safari do not support the hardwareConcurrency property.
Will hard code it to 2, as iOS only supports that amount.
Pick-to: 6.3 6.2
Change-Id: Icb35d3b698b28d8191a554167dc8cc262b806fb2
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
The documentation states that the function will not have any effect
before control enters the main event loop. Prior to 0c02f133f3daee1
this was incidentally true due to QCoreApplication::exit just setting
quitNow to true and exiting all the event loops (which before exec
were none), and exec() setting quitNow to false explicitly. But
now that we plumb the quit down to the platform we can't rely
on this incidental behavior, and need to check explicitly.
Fixes: QTBUG-98088
Pick-to: 6.2
Change-Id: I54cece3630e39e4456abc3b372839c0b5c4c4713
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
The QCoreApplicationPrivate::appendApplicationPathToLibraryPaths()
function has been there since at least Qt 4.5.1, so the documentation
for appendLibraryPaths() hasn't matched behavior for a minimum of 13
years. The documentation for libraryPaths() has mentioned this fact,
though.
Searching the application's bin dir is normal on Windows, as many
application packages are a flat install with the .exe and all .dlls in
one dir. I find it questionable to do so on Unix, though: any and all
applications expecting to be installed by a Linux distribution would not
install plugins to /usr/bin, whereas on macOS bundles have their own
organization anyway.
But I'm not prepared to change the behavior without more justification.
I can think only of broken configurations (such what is described in
QTBUG-97950 where a combination of bad decisions led to scanning all of
/usr/bin) and running an executable that is stored in a world-writable
directory.
Task-number: QTBUG-97950
Pick-to: 6.2
Change-Id: Ice04365c72984d07a64dfffd16b440868373d7a5
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>
The wasm event dispatcher needs to differentiate between
top-level QCoreApplication::exec() and QEventLoop::exec()
calls.
Add the “ApplicationExec” enum value. The value is
undocumented, like EventLoopExec and DialogExec.
Change-Id: I2924daee39ef85a3ea7e766e317b3071b5d7f541
Reviewed-by: Lorn Potter <lorn.potter@gmail.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
In a512e210ac5b032c5fc2edf1ddf72e5a414485fda512e21 quitOnLastWindowClosed
was changed to be implemented in terms of quitLockEnabled, but without
any documentation to that end.
Although the two features are similar (automatic quit under certain
conditions), and interact, it doesn't make sense to overlap them until
we actually expose them as a single property (automaticQuit e.g.)
The logic for determining whether we can can quit automatically has
been refactored to take both properties into account, on both a Core
and Gui level. The call sites still need to check the individual
properties to determine whether to activate automatic quit for
that particular code path.
Change-Id: I38c3e8cb30db373ea73dd45f150e5048c0db2f4d
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
It is no longer handled separately from Android.
This effectively reverts commit 6d50f746fe05a7008b63818e77784dd0c99270a1
Change-Id: Ic2d75b8c5a09895810913311ab2fe3355d4d2983
Reviewed-by: Assam Boudjelthia <assam.boudjelthia@qt.io>
Passing nullptr as receiver and/or as an event parameter to sendEvent,
postEvent, etc. is meaningless. It's also something that users can check
for. Therefore, it should not be allowed. Note that the current code
already relies on the arguments not to be null, albeit "indirectly"
(e.g. they get dereferenced without any null checks).
Hence: add asserts that check for non-null in all the relevant
codepaths, except for the ones in which there's currently just a
warning; for those, add a Qt 7 note.
Change-Id: Ia4c58551de88a5d1003f09efa448c1330b6cb122
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
The documentation links on `msdn.microsoft.com` and
`msdn2.microsoft.com` now redirect to `docs.microsoft.com`.
Some of the links in the documentation were to those domains.
In particular:
- An `\externalpage` link to the `Mitigating Cross-site Scripting With
HTTP-only Cookies` article.
- An `\externalpage` link to `Microsoft Actibe Accessibility Event
Constants`
- A link to the `RtlGetVersion` function in
`qoperatingsystemversion.cpp`
- A link to the `GetCommandLine` function in `qcoreapplication.cpp`
- A link to the `KNOWNFOLDERID` constant in `qfiledialog.cpp`
While the redirection works, our script to catch broken links on
dev-snapshots builds of the documentation doesn't handle redirection
correctly, reporting it as broken.
Both to appease the broken-links script and to avoid an unneccesary
redirection, the above links were modified to
point to the equivalent address in the new domain.
Task-number: QTBUG-96127
Pick-to: 6.2
Change-Id: I0e9a132f06af7fc43bca6c8ad2054feb6e3e27cd
Reviewed-by: Paul Wicking <paul.wicking@qt.io>
If the QBindingStatus we receive from the QObject is from the thread
which is currently running, we do not need to refetch the thread local;
the reason we refetched the thread_local was after all only to guard
against the case where a QObject's property gets read in a different
thread.
To determine whether we are in the same thread, we can store the thread
id in the thread_local structure. Currently, it only gets initialized
for the main thread in QCoreApplication (as bindings are mostly used
there).
At a later point, we could either expose initBindingStatusThreadId, or
call the function when a QThread gets started.
Pick-to: 6.2
Change-Id: Id8eb803973bb083abfab83a62bfccc9e88a4e542
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
From the API review session, a potential deadlock behavior might
occur when using QFuture's synchronous APIs on the UI thread. Also
the fact that this api currently have an implementation only for
Android. For those reasons we thought this API could be postponed
until Qt 6.3, when the QFuture concern is addressed and other
platforms other than Android are implemented as well.
Pick-to: 6.2
Change-Id: I1aef025488c24791da85d15fb57367d3e5e681be
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
And remove plumbing from public QCoreApplication API, which is going to
be removed in follow up patch after leaf modules have moved to the private
Android API.
The public permissions API will be reintroduced in 6.3 after further work.
Pick-to: 6.2
Change-Id: I46772284b98d0ced8d4a624a850adaa4a1dfe645
Reviewed-by: Assam Boudjelthia <assam.boudjelthia@qt.io>
The use of a freestanding function is not needed now that the name
doesn't alias the nativeInterface accessor function, and was just
adding complexity to the machinery.
People not familiar with the code will have an easier time following
the flow through the helper member function, and we no longer need
to declare our own export macros.
Pick-to: 6.2
Change-Id: I17530b7e89939cfc19ab8ffaa076b7129ae02dcf
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
Pick-to: 6.2
Task-number: QTBUG-94407
Change-Id: Ie9c05dbe498cd372c015b5125e6cb8d59ca96b59
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
Thanks to Giuseppe for pointing it out in API change review.
Task-number: QTBUG-94407
Pick-to: 6.2
Change-Id: I3b8fb653b5efa7ded51f81aadb35d361e7dbf19c
Reviewed-by: Assam Boudjelthia <assam.boudjelthia@qt.io>
Integrity doesn't have langinfo, default locale is C, set to UTF-8
Change-Id: I6a6374195344641f64da895cd5f2745b61af060a
Reviewed-by: Kimmo Ollila <kimmo.ollila@qt.io>
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Reviewed-by: Tuukka Turunen <tuukka.turunen@qt.io>
The latter forces users to build with RTTI enabled, as the typeid
use is in our public headers. Surprisingly this is also the case
even without instantiating the relevant template.
Change-Id: Icd18a2b85b250e0b77960797e5c43b7eaf9bd891
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
Using the permission API without guards for Android cause exception
on all other platforms, instead we can print a warning with the same
message if QT_DEBUG is defined to also make it less confusing for other
platforms.
Also, return QPermission::Authorized by default for platforms with no
implementation to this API.
Change-Id: Ie01a6a7f8b6a066685d32c861a56e9ded2c06410
Reviewed-by: Sona Kurazyan <sona.kurazyan@qt.io>
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
The initial approach for providing public access to native
interfaces via T::nativeInteface<I>() was based on the template
not being defined, and then having explicit instantiations of
the supported types in a source file, so that the accessors
were exported and available to the user.
This worked fine for "simple" types such as QOpenGLContext
and QOffscreenSurface, but presented a problem in the context
of classes with subclasses, such as Q{Core,Gui}Application.
To ensure that a native interface for QCoreApplication was
accessible both from QCoreApplication and its subclasses,
while at the same time preventing a native interface for
QGuiApplication to be accessible for QCoreApplication, the
nativeInterface() template function had to be declared in
each subclass. Which in turn meant specializing each native
interface once for each subclass it was available in.
This quickly became tedious to manage, and the requirements
for exposing a new native interface wasn't very clear with
all these template specializations and explicit instantiations
spread around.
To improve on this situation, while also squashing a few
other birds at the same time, we change the approach to
use type erasure. The definition of T::nativeInteface<I>()
is now inline, passing on the requested interface to a per
type (T, not I) helper function, with the interface type
flattened to a std::type_info.
The type_info requested by the user is then compared to the
available types in a single per-type (T) "switch statement",
which is a lot easier to follow for someone trying to trace
the logic of how a native interface is resolved.
We can safely rely on type_info being stable between the user
application and the Qt library as a result of exporting the
type info for each native interface, by explicitly ensuring
they have a key function. This is the same mechanism that
ensures we can safely dynamic_cast these interfaces, even
across library boundaries.
The use of a free standing templated helper function instead
of a member function in the type T, is to avoid shadowing issues,
and to not pollute the class namespace of T with the helper
function.
Since we are already changing the plumbing for how a user
resolves a native interface for a type T, we take the opportunity
to add a few extra safeguards to the machinery.
First, we add a static assert in the T::nativeInteface<I>()
definition, that ensures that only compatible interfaces,
as declared by the interface themselves, are allowed.
This ensures a compile time error when an incompatible
interface is requested, which improves on the link time
errors we had prior to this patch, and also offsets the
one downside of type erasure, namely that errors are only
caught at runtime.
Secondly, each interface meant for public consumption through
T::nativeInteface<I>() is declared with a revision, which
is checked when requesting the interface. This allows us
to bump the revision when we make breaking changes to the
interface that would have otherwise been binary incompatible.
Since the user will never see this interface due to the
revision check, they will not end up calling methods that
have been removed or renamed.
One advantage of moving to a type-erased approach for the
plumbing is that we're not longer exposing the native
interface types as part of the T::nativeInteface symbols.
This means that if we ever want to rename a native interface,
the only exported symbol that the user code relies on is
the type info. Renaming is then possible by just exporting
the type info for the old interface, but leaving it empty.
Since no class in Qt implements the old native interface,
the user will just get a nullptr back, similarly to bumping
the revision of an interface.
Change-Id: Ie50d8fb536aafe2836370caacb22afbcfaf1712a
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
This amends afd7460affa17b5f8aac9034b1b9c3b13dd115f7
Add new app permissions API under QCoreApplication
Which added QFuture use without protection for platforms with no
real future.
Change-Id: Iac50a71c9821255621d7582481270b2023610405
Reviewed-by: Sona Kurazyan <sona.kurazyan@qt.io>
The API allows users to request and check the status of various
permissions. A predefined enum class of the common permission types
on different platforms is used to allow requesting permission with
a common code. Platform specific permissions are defined only on their
relevant platform. For permissions that are not predefined, they can
be requested via a string variant of this API.
This adds the Android implementation only.
[ChangeLog][QtCore] Add new API for handling app permissions with an
initial implementation for Android.
Task-number: QTBUG-90498
Change-Id: I3bc98c6ab2dceeea3ee8edec20a332ed8f56ad4f
Reviewed-by: Sona Kurazyan <sona.kurazyan@qt.io>
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
This implements getting the executable file name for FreeBSD. Linux has
a similar functionality (but called AT_EXECFN), but the /proc/self/exe
trick is actually better: it returns a full canonical path instead of
the argument passed to execve(), and it follows a rename of the
executable.
Change-Id: I7a386ad4f0cb4e2ba629fffd16789acda415213f
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
A file that doesn't exist can't have a canonical path, so we don't need
to check fi.exists() before calling fi.canonicalFilePath(). Also avoids
a TOCTOU mistake: if the exists() returned true, we would store whatever
canonicalFilePath() returned, even an empty string (which can also
happen if realpath(3) fails for some reason).
Change-Id: I7a386ad4f0cb4e2ba629fffd16789aaa8367e641
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
And by introducing a local qAppFileName() for non-Windows and non-Mac.
This merges the simplification that each OS does to the obtained file
path to a common procedure, removing differences in behavior.
Previously, some would get the canonical file path and some wouldn't.
Change-Id: I6cdea00671e8479b9c50fffd167899036eaaa23e
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
There's no need to format our PID there if /proc/self exists and is a
link to the current process.
Drive-by replace with QStringLiteral, since we won't do any formatting
anyway.
Change-Id: I7a386ad4f0cb4e2ba629fffd1678fbf0a484ea69
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
Don't call pre routine function in qAddPreRoutine if
the qt_call_pre_routines is not called
Pick-to: 6.1 6.0
Task-number: QTBUG-90341
Change-Id: I0ee70561dc57b857f8b3b1cf42c9dfe0cf45bd49
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
QAndroidApplication provides the Android specific app context() and
isActivityContext() to determine whether the context is an Activity or
otherwise a Service.
Task-number: QTBUG-90499
Change-Id: Iae2eef7ec44859a89825b09f52f09506b20b5420
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
As part of Qt 6 restructring for the extras modules, this change exposes
the Jni APIs which are very important for Android platform. This patch
adds the APIs QJniObject, QJniEnvironment, QJniExceptionCleaner based
from private QtCore and QtAndroidExtras.
The Jni interface is cross-platform which justifies the name, but
currently, this API is used mainly for Android, and the naming comes
generic without Android keyword to avoid any future limitation on
supporting other platforms.
[ChangeLog][QtCore] Add new QJniObject, QJniEnvironment and
QJniExceptionCleaner APIs.
Task-number: QTBUG-89482
Fixes: QTBUG-89633
Change-Id: I4382dd53a225375759b9d042f6035a4a9810572b
Reviewed-by: Ville Voutilainen <ville.voutilainen@qt.io>
Just shows how bad an idea to call this function it is.
Pick-to: 5.15
Fixes: QTBUG-88653
Change-Id: If51855da004b4f3fbf43fffd1648fc294065160d
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Not used anywhere in Qt 6, and if whatever needs this ever comes back,
then we won't implement it like this.
Change-Id: I99655ba5825644cef3686bbe50ca688b68f5c2a4
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
The documentation of processEvents states that it processes all
pending events. However, this is not true for the glib backend
and probably was not true for at least a decade.
QEventDispatcherGlib::processEvents(ProcessEventsFlags)
calls "g_main_context_iteration" which is documented
to only process events of highest priority:
https://developer.gnome.org/glib/2.66/glib-The-Main-Event-Loop.html#g-main-context-iteration
Fixes: QTBUG-87307
Task-number: QTBUG-84291
Pick-to: 5.15
Change-Id: I82c6f9dba865bb07f981ad648a128316749682ca
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
No action taken at Qt 6, suggesting it shall never happen.
Four removed, one converted to Qt 7, others converted to unversioned TODOs.
Filed Jira tasks, and referenced in comments, for those retained.
There remain two "once bootstrap builds are obsolete" comments and
one other on which pending action may yet happen.
Fixes: QTBUG-85700
Change-Id: Ib140a6a21c63370e51e4734cc591f67573a29d9a
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
We can't assume that the number of arguments we get from GetCommandLine
will match what we have from argc, as the former is not wildcard
expanded on MingGW.
mingw64 will ask __getmainargs to expand wildcards depending on
the mingw-specific variable _dowildcard. By default this is set
to 0 (false), but some mingw64-packagers (msys2, mingw-builds)
pass --enable-wildcard during build, changing this default. As
a result, the arguments we get through argc/__argc have already
been expanded. MinGW does not reflect this through GetCommandLine
though, like MSVC does, which triggered the assert.
Amends dff18b8e80609da91bf9e9134967dcf0d23eca9e.
Pick-to: 5.15
Fixes: QTBUG-67515
Task-number: QTBUG-84002
Change-Id: Ib87961c6901d2894b48ba0f5b9a3d6da2a595f24
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Reviewed-by: Simon Hausmann <hausmann@gmail.com>
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>
... and from the duplicated Q_DECLARE_TR_FUNCTION macro for QXmlStream.
We expect source code to be utf8 encoded in Qt 6, so the function is gone.
Change-Id: Ie25329a54e709dc92a22893ad5ab023852300d81
Reviewed-by: Kai Koehne <kai.koehne@qt.io>
If we have a platform plugin we ask the platform to quit, and if
not we fall back to the base implementation of QCoreApplication
that sends Quit events directly.
This allows the platform to involve the rest of the system in the
process. The platform will then come back with a spontaneous quit
via QWSI::handleApplicationTermination(), which will then send
the corresponding Quit even from QGuiApplication like normal.
Task-number: QTBUG-45262
Task-number: QTBUG-33235
Task-number: QTBUG-72013
Task-number: QTBUG-59782
Change-Id: I0000aaf7192e4b905933c5da0e53901c6c88f26a
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
As per ### Qt6 comment. Also rename the LibraryLocation enum
to LibraryPath.
Change-Id: I556025a19c5bcdf2ff52598eaba32269522d4128
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Instead of QCoreApplication::quit() directly calling exit(0), which would
leave QGuiApplication and client code out of the loop, we now send the
Quit event, and let it pass through event delivery, before finally ending
up in QCoreApplication::event(), where we call exit(0).
This has the advantage that QGuiApplication can ensure all windows are
closed before quitting, and if any of those windows ignore the close
event the quit will be aborted. This aligns the behavior of synthetic
quits via QCoreApplication::quit() with spontaneous quits from the
platform via QGuiApplicationPrivate::processApplicationTermination.
Clients who wish to exit the application without any event delivery or
potential user interaction can call the lower level exit() function
directly.
[ChangeLog][QtGui] Application termination via qApp->quit() will now
deliver Quit events to the application, which in turn will result in
application windows being closed as part of the application quit,
with an option to cancel the application quit by ignoring the close
event. Clients who explicitly want to exit the application without
any user interaction should call QCoreApplication::exit() explicitly.
Task-number: QTBUG-45262
Task-number: QTBUG-33235
Task-number: QTBUG-72013
Task-number: QTBUG-59782
Change-Id: Id4b3907e329b9ecfd936fe9a5f8a70cb66b76bb7
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
High-DPI pixmaps are always enabled, and cannot be disabled.
Change-Id: I01a006b404e5431582b64ef812974c1c022b39ae
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
This attribute is now on by default.
Change-Id: I7c9d2e3445d204d3450758673048d514bc9c850c
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
