Add a Mach-O decoder to the QPluginLoader

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>

1 files changed, 3 insertions, 2 deletions

diff --git a/tests/auto/corelib/plugin/qpluginloader/tst/tst.pro b/tests/auto/corelib/plugin/qpluginloader/tst/tst.pro
index a7a9661a54..3894c90ae3 100644
--- a/tests/auto/corelib/plugin/qpluginloader/tst/tst.pro
+++ b/tests/auto/corelib/plugin/qpluginloader/tst/tst.pro
@@ -2,7 +2,8 @@ CONFIG += testcase
 CONFIG += parallel_test
 TARGET  = ../tst_qpluginloader
 QT = core testlib
-SOURCES = ../tst_qpluginloader.cpp
+contains(QT_CONFIG, private_tests): QT += core-private
+SOURCES = ../tst_qpluginloader.cpp ../fakeplugin.cpp
 HEADERS = ../theplugin/plugininterface.h
 CONFIG -= app_bundle
 
@@ -14,5 +15,5 @@ win32 {
     }
 }
 
-TESTDATA += ../elftest
+TESTDATA += ../elftest ../machtest
 DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0