https://bugs.kde.org/show_bug.cgi?id=444003
--- Comment #10 from James Beddek <tel...@posteo.de> --- I did a bisect of Clang/LLVM as the tests pass on 12.0.1, but not 13.0.0. That led me to this commit: https://github.com/llvm/llvm-project/commit/0aa0458f1429372038ca6a4edc7e94c96cd9a753 Which has issues with thunks: https://reviews.llvm.org/D100388 That is seemingly in progress but has no progress in many months. Below is the "kjsapitest" test ran with ubsan and Clang 12.0.1: /home/telans/src/kde/kjs/src/kjs/object.cpp:247:27: runtime error: member call on misaligned address 0x000000000003 for type 'KJS::JSValue', which requires 8 byte alignment 0x000000000003: note: pointer points here <memory cannot be printed> SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/telans/src/kde/kjs/src/kjs/object.cpp:247:27 in UndefinedBehaviorSanitizer:DEADLYSIGNAL ==2158002==ERROR: UndefinedBehaviorSanitizer: SEGV on unknown address 0x000000000003 (pc 0x7f92776b4c1f bp 0x7fff485b9990 sp 0x7fff485b9680 T2158002) ==2158002==The signal is caused by a READ memory access. ==2158002==Hint: address points to the zero page. #0 0x7f92776b4c1f in KJS::JSObject::put(KJS::ExecState*, KJS::Identifier const&, KJS::JSValue*, int) /home/telans/src/kde/kjs/src/kjs/object.cpp:247:27 #1 0x7f9277685633 in KJS::ErrorPrototype::ErrorPrototype(KJS::ExecState*, KJS::ObjectPrototype*, KJS::FunctionPrototype*) /home/telans/src/kde/kjs/src/kjs/error_object.cpp:53:5 #2 0x7f92776c5d13 in KJS::Interpreter::initGlobalObject() /home/telans/src/kde/kjs/src/kjs/interpreter.cpp:385:38 #3 0x7f92776c40c7 in KJS::Interpreter::init() /home/telans/src/kde/kjs/src/kjs/interpreter.cpp:270:5 #4 0x7f92776c44aa in KJS::Interpreter::Interpreter() /home/telans/src/kde/kjs/src/kjs/interpreter.cpp:231:5 #5 0x7f92784701c6 in KJSInterpreter::KJSInterpreter() /home/telans/src/kde/kjs/src/kjs/api/kjsinterpreter.cpp:99:27 #6 0x23cd61 in KJSApiTest::objectConstruction() /home/telans/src/kde/kjs/autotests/kjsapitest.cpp:48:20 #7 0x240059 in KJSApiTest::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) /home/telans/src/kde/kjs/build/autotests/kjsapitest_autogen/include/kjsapitest.moc:96:21 #8 0x7f92783244fe in QMetaMethod::invoke(QObject*, Qt::ConnectionType, QGenericReturnArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument) const /usr/src/debug/dev-qt/qtcore-5.15.2-r10/qtbase-a4f9e56975fa6ab4a1f63a9b34a4d77b1cfe4acd/src/corelib/kernel/qmetaobject.cpp:2303:13 #9 0x7f927841ed5c in QMetaMethod::invoke(QObject*, Qt::ConnectionType, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument) const /usr/src/debug/dev-qt/qttest-5.15.2-r10/qtbase-a4f9e56975fa6ab4a1f63a9b34a4d77b1cfe4acd_build/src/testlib/../../include/QtCore/../../../qtbase-a4f9e56975fa6ab4a1f63a9b34a4d77b1cfe4acd/src/corelib/kernel/qmetaobject.h:122:16 #10 0x7f927841ed5c in QTest::TestMethods::invokeTestOnData(int) const /usr/src/debug/dev-qt/qttest-5.15.2-r10/qtbase-a4f9e56975fa6ab4a1f63a9b34a4d77b1cfe4acd/src/testlib/qtestcase.cpp:938:41 #11 0x7f927841f7d7 in QTest::TestMethods::invokeTest(int, char const*, QTest::WatchDog*) const /usr/src/debug/dev-qt/qttest-5.15.2-r10/qtbase-a4f9e56975fa6ab4a1f63a9b34a4d77b1cfe4acd/src/testlib/qtestcase.cpp:1166:17 #12 0x7f9278420709 in QTest::TestMethods::invokeTests(QObject*) const /usr/src/debug/dev-qt/qttest-5.15.2-r10/qtbase-a4f9e56975fa6ab4a1f63a9b34a4d77b1cfe4acd/src/testlib/qtestcase.cpp:1507:33 #13 0x7f9278420d54 in QTest::qRun() /usr/src/debug/dev-qt/qttest-5.15.2-r10/qtbase-a4f9e56975fa6ab4a1f63a9b34a4d77b1cfe4acd/src/testlib/qtestcase.cpp:1934:14 #14 0x7f9278420a1d in QTest::qExec(QObject*, int, char**) /usr/src/debug/dev-qt/qttest-5.15.2-r10/qtbase-a4f9e56975fa6ab4a1f63a9b34a4d77b1cfe4acd/src/testlib/qtestcase.cpp:1842:15 #15 0x23fdf3 in main /home/telans/src/kde/kjs/autotests/kjsapitest.cpp:283:1 #16 0x7f92779967fc in __libc_start_main /usr/src/debug/sys-libs/glibc-2.33-r7/glibc-2.33/csu/../csu/libc-start.c:332:16 #17 0x21af89 in _start /usr/src/debug/sys-libs/glibc-2.33-r7/glibc-2.33/csu/../sysdeps/x86_64/start.S:120 UndefinedBehaviorSanitizer can not provide additional info. SUMMARY: UndefinedBehaviorSanitizer: SEGV /home/telans/src/kde/kjs/src/kjs/object.cpp:247:27 in KJS::JSObject::put(KJS::ExecState*, KJS::Identifier const&, KJS::JSValue*, int) ==2158002==ABORTING -- You are receiving this mail because: You are watching all bug changes.
