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  1. Qt
  2. QTBUG-56264

Creating a QJSEngine results in a segfault on Sparc64

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    • 73f1fa8a8ec53d9ebb4a052a1f109e54cd834a87

      Running this code:

      #include <QtGui/QGuiApplication>
#include <QtQml/QJSEngine>

int main(int argc, char **argv) {
    QGuiApplication app(argc, argv);
    QJSEngine engine;
    return 0;
}

      results in the following crash on Sparc64 architecture:

      #0  __memcpy_large () at ../sysdeps/sparc/sparc64/memcpy.S:359
No locals.
#1  0xffff80010030ffbc in memcpy (__len=<optimized out>, __src=<optimized out>, __dest=<optimized out>)
    at /usr/include/sparc64-linux-gnu/bits/string3.h:53
No locals.
#2  QV4::Value::m (this=<optimized out>) at jsruntime/qv4value_p.h:119
        b = 0xffff800100110700
#3  QV4::Object::d (this=<optimized out>) at jsruntime/qv4object_p.h:148
No locals.
#4  QV4::Object::internalClass (this=<optimized out>) at jsruntime/qv4object_p.h:159
No locals.
#5  QV4::Object::engine (this=<optimized out>) at jsruntime/qv4object_p.h:228
No locals.
#6  QV4::Object::insertMember (attributes=..., v=..., s=<optimized out>, this=0x0) at jsruntime/qv4object_p.h:221
No locals.
#7  QV4::Object::defineReadonlyProperty (this=this@entry=0x0, name=0xffff800108530248, value=...) at jsruntime/qv4object.cpp:200
No locals.
#8  0xffff800100371ea0 in QV4::TypedArrayPrototype::init (this=this@entry=0x0, engine=engine@entry=0x16c620, ctor=0x0)
    at jsruntime/qv4typedarray.cpp:398
        scope = {engine = 0x16c620, mark = 0xffff800108530328}
#9  0xffff8001002b6150 in QV4::ExecutionEngine::ExecutionEngine (this=0x16c620, factory=<optimized out>) at jsruntime/qv4engine.cpp:368
        i = 0
        argsClass = <optimized out>
        functionProtoClass = <optimized out>
        o = <optimized out>
        gcBlocker = {mm = 0x146df0, wasBlocked = false}
        index = 2
        scope = {engine = 0x16c620, mark = 0xffff800108530318}
        name = <optimized out>
#10 0xffff800100448074 in QV8Engine::QV8Engine (this=0x169520, qq=<optimized out>) at qml/v8/qv8engine.cpp:144
        _qml_memory_scope = {pushed = false}
#11 0xffff80010027039c in QJSEngine::QJSEngine (this=0x7fefffff1d0) at jsapi/qjsengine.cpp:252
No locals.
#12 0x0000000000100808 in main (argc=<optimized out>, argv=0x7fefffff578) at test.cpp:6
        app = <incomplete type>
        engine = {<QObject> = {<No data fields>}, static staticMetaObject = {d = {superdata = 0xffff8001013f5c70 <QObject::staticMetaObject>, 
              stringdata = 0xffff8001004b8598 <qt_meta_stringdata_QJSEngine>, data = 0xffff8001004b8558 <qt_meta_data_QJSEngine>, 
              static_metacall = 0xffff800100270270 <QJSEngine::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, 
              relatedMetaObjects = 0x0, extradata = 0x0}}, d = 0x0}

      I am happy to provide any other debugging information if needed.

        1. qtdecl5.patch.1
          0.7 kB
        2. qtdecl5.patch.3
          1 kB
        3. qtdecl5.patch.6
          2 kB
        4. sparc64_v2.diff
          2 kB
        5. sparc64.patch
          1 kB
        For Gerrit Dashboard: QTBUG-56264
        # Subject Branch Project Status CR V
        263441,3 Add a workaround for ia64 to move Value bits 63-61 to 49-47 for pointers 5.12 qt/qtdeclarative Status: MERGED +2 0

            qtqmlteam Qt Qml Team User
            mandriver Dmitry Shachnev
            Votes:
            3 Vote for this issue
            Watchers:
            9 Start watching this issue

              Created:
              Updated:
              Resolved:

                There are no open Gerrit changes