According to QUIP-18 [1], all tests file should be
LicenseRef-Qt-Commercial OR GPL-3.0-only
[1]: https://contribute.qt-project.org/quips/18
Pick-to: 6.7
Task-number: QTBUG-121787
Change-Id: I9657df5d660820e56c96d511ea49d321c54682e8
Reviewed-by: Christian Ehrlicher <ch.ehrlicher@gmx.de>
Replace the current license disclaimer in files by
a SPDX-License-Identifier.
Files that have to be modified by hand are modified.
License files are organized under LICENSES directory.
Task-number: QTBUG-67283
Change-Id: Id880c92784c40f3bbde861c0d93f58151c18b9f1
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Reviewed-by: Jörg Bornemann <joerg.bornemann@qt.io>
Indetnation was bad in commit 0ab3c5c2505dcfa684fd4a3961f24345de7e1d6f
and was missed in code review and one comment wasn't updated when the
code was.
Take the opportunity to remove an old TODO that has been completed for
years.
Change-Id: Ice04365c72984d07a64dfffd16b4899604513680
Reviewed-by: Andrei Golubev <andrei.golubev@qt.io>
Clang aligns the object at 32-byte boundaries even though we
specifically asked for alignof(void*), so tell it not to sanitize the
address of the plugin object. Tested with Clang 12 and 13.
GCC seems not to be affected, even when ASan is enabled.
If this doesn't work, we may need to accept reading a note that is
improperly aligned. I don't think the output will be actually a correct
note because the intra-note alignment will be wrong (I carefully chose
the ELF note name so it would not require alignment, but that's only
valid up to 8-byte alignments).
Fixes: QTBUG-97941
Change-Id: Ice04365c72984d07a64dfffd16b422fe074d8a70
Reviewed-by: Andrei Golubev <andrei.golubev@qt.io>
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
A few systems, like OpenWRT, may strip the section table off the
resulting binaries (see [1]), making it impossible for us to pinpoint
the exact location of the Qt plugin metadata. This commit moves the meta
data to a location that is identifiable even in fully stripped binaries:
an ELF note.
By naming our section ".note.qt.metadata", we instruct the linker to
place it along the other notes and to mark it in the program header
section. Another advantage is that the notes are usually in the very
beginning of the file, as they are used by the dynamic linker itself, so
we'll need to read much less of the full contents.
The unit test is modified not to attempt to strip the plugin of
debugging data. In fact, we add something to the end that would,
otherwise, be matched as (invalid) metadata.
The following was produced with GCC 11 and GNU binutils ld 2.36.1.
Section Headers:
[Nr] Name Type Addr Off Size ES Flags Lk Inf Al
[ 0] NULL 0000000000000000 00000000 00000000 0 0 0 0
[ 1] .note.gnu.property NOTE 00000000000002a8 000002a8 00000030 0 A 0 0 8
[ 2] .note.gnu.build-id NOTE 00000000000002d8 000002d8 00000024 0 A 0 0 4
[ 3] .note.qt.metadata NOTE 00000000000002fc 000002fc 000001ac 0 A 0 0 4
Program Headers:
Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align
...
NOTE 0x0002a8 0x00000000000002a8 0x00000000000002a8 0x000030 0x000030 R 0x8
NOTE 0x0002d8 0x00000000000002d8 0x00000000000002d8 0x0001d0 0x0001d0 R 0x4
The Qt metadata note is 4-byte aligned and can thus be found in the
second note section, which spans from 0x02d8 to 0x02d8+0xac=0x0384.
GNU readelf -n can even show it:
Displaying notes found in: .note.qt.metadata
Owner Data size Description
qt-project! 0x0000018f Unknown note type: (0x74510001)
description data: 01 06 03 81 bf ...... ff
I chose 0x7451 as the prefix for our notes, even though they're already
namespaced by the owner in the first place, because eu-readelf
mistakenly tries to interpret note 1 as a GNU ABI tag regardless of
owner. The owner name was chosen to be 12 bytes long, so the ELF note
header is 24 bytes in total. There's no space wasted because the payload
needs to be aligned to 32-bit anyway and I didn't want to use only 4
characters (header total size 16 bytes) so we'd skip the "GNU" note on
size, without string comparison. And I couldn't think of a 4-character
representative string ("QtP" ?).
[1] https://github.com/openwrt/video/issues/1
Fixes: QTBUG-96327
Change-Id: I2de1b4dfacd443148279fffd16a3987729346567
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
When assigning multiple variables to a specific section, both GCC
and Clang legitimately error out if those variables wouldn't end
up in the same section (e.g. if one of them is going to a read-only
section while the other one is going to a read-write section).
In C++, when a seemingly const variable needs dynamic initialization,
it needs to be stored in a read-write section.
Clang 13 changed internals for how some constants are materialized.
Now, when a variable is initialized with an expression containing
plain old fashioned casts, it is considered to be potentially
runtime initialized (at the point when section assignment conflicts
is evaluated). Therefore, Clang 13 errors out on fakeplugin.cpp
with errors like:
fakeplugin.cpp:36:39: error: 'message' causes a section type conflict with 'pluginSection'
QT_PLUGIN_METADATA_SECTION const char message[] = "QTMETADATA";
^
fakeplugin.cpp:32:40: note: declared here
QT_PLUGIN_METADATA_SECTION void *const pluginSection = (void*)(0xc0ffeec0ffeeL);
^
See https://bugs.llvm.org/show_bug.cgi?id=51442 for discussion
on the matter in Clang.
To simplify things, just initialize the fake pointers as regular
uintptr_t instead, avoiding the whole matter. This produces the
exact same contents in the section as before.
For what it's worth, the actual manually constructed metadata in
fakeplugin.cpp doesn't seem to have any effect on running the
QPluginLoader tests on either ELF or MachO right now.
Change-Id: Ib84a2ceb20cb8e3a1bb5132a5715538e08049616
Pick-to: 6.2 6.1
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Not that we require it, but since The Qt Company did it for all files
they have copyright, even if they haven't touched the file in years
(especially not in 2016), I'm doing the same.
Change-Id: I7a9e11d7b64a4cc78e24ffff142b4c9d53039846
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>
From Qt 5.7 -> tools & applications are lisenced under GPL v3 with some
exceptions, see
http://blog.qt.io/blog/2016/01/13/new-agreement-with-the-kde-free-qt-foundation/
Updated license headers to use new GPL-EXCEPT header instead of LGPL21 one
(in those files which will be under GPL 3 with exceptions)
Change-Id: I42a473ddc97101492a60b9287d90979d9eb35ae1
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>
Qt copyrights are now in The Qt Company, so we could update the source
code headers accordingly. In the same go we should also fix the links to
point to qt.io.
Outdated header.LGPL removed (use header.LGPL21 instead)
Old header.LGPL3 renamed to header.LGPL3-COMM to match actual licensing
combination. New header.LGPL-COMM taken in the use file which were
using old header.LGPL3 (src/plugins/platforms/android/extract.cpp)
Added new header.LGPL3 containing Commercial + LGPLv3 + GPLv2 license
combination
Change-Id: I6f49b819a8a20cc4f88b794a8f6726d975e8ffbe
Reviewed-by: Matti Paaso <matti.paaso@theqtcompany.com>
We already had an ELF decoder, which helped us greatly to find the
metadata and that catches most Unix systems (Solaris, QNX, HP-UXi, and
all of the free Unixes). On other Unix systems, aside from Mac OS X,
we simply scanned the entire file for the signature. On Windows, even
without a COFF-PE decoder, we use a LoadLibrary trick to load the
plugin without loading the dependent libraries. In most cases, that
works.
Unfortunately, on Mac OS X we didn't have a decoder and nor could we
do the file scan: because Mac OS X binaries could be fat binaries, we
wouldn't know which architecture's signature we had found.
No more. This adds a full Mach-O decoder to QtCore. It is also capable
of finding the boundaries of the architecture's binary, but that
functionality is disabled since all Qt 5 plugins have plugin metadata
sections.
Change-Id: I2d5c04c5ecf024864b8a43f31ab6b7e6c5eae9ce
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
