2008-03-19  Sam Weinig  <sam@webkit.org>

        Reviewed by Anders Carlsson.

        Fix for <rdar://problem/5785694>
        Crash occurs at KJS::Collector::collect() when loading web clip widgets with a PAC file

        Make the activeExecStates stack per JSGlobalObject instead of static to ensure
        thread safety.

        * JavaScriptCore.exp:
        * kjs/ExecState.cpp:
        (KJS::InterpreterExecState::InterpreterExecState):
        (KJS::InterpreterExecState::~InterpreterExecState):
        (KJS::EvalExecState::EvalExecState):
        (KJS::EvalExecState::~EvalExecState):
        (KJS::FunctionExecState::FunctionExecState):
        (KJS::FunctionExecState::~FunctionExecState):
        * kjs/ExecState.h:
        (KJS::):
        * kjs/JSGlobalObject.cpp:
        (KJS::JSGlobalObject::mark):
        * kjs/JSGlobalObject.h:
        (KJS::JSGlobalObject::activeExecStates):
        * kjs/collector.cpp:
        (KJS::Collector::collect):
        (KJS::Collector::reportOutOfMemoryToAllExecStates): Iterate all JSGlobalObjects and report
        the OutOfMemory condition to all the ExecStates in each.

WebCore:

2008-03-19  Sam Weinig  <sam@webkit.org>

        Reviewed by Anders Carlsson.

        Fix for <rdar://problem/5785694>
        Crash occurs at KJS::Collector::collect() when loading web clip widgets with a PAC file

        Make the activeExecStates stack per JSGlobalObject instead of static to ensure
        thread safety.

        * bindings/objc/WebScriptObject.mm:
        (+[WebScriptObject throwException:]): Change to throw an exception on the current
        GlobalObject instead of the top of the static activeExecStates stack.
        (-[WebScriptObject setException:]): Change to use the top of the rootObjects GlobalObject
        instead of the top of the static activeExecStates stack.

        * bridge/c/c_instance.cpp:
        * bridge/c/c_instance.h:
        * bridge/jni/jni_instance.cpp:
        (JavaInstance::virtualBegin):
        (JavaInstance::virtualEnd):
        * bridge/jni/jni_instance.h:
        * bridge/objc/objc_instance.h:
        * bridge/objc/objc_instance.mm:
        (ObjcInstance::~ObjcInstance):
        (ObjcInstance::virtualBegin):
        (ObjcInstance::virtualEnd):
        * bridge/runtime.cpp:
        (KJS::Bindings::Instance::setDidExecuteFunction):
        (KJS::Bindings::Instance::didExecuteFunction):
        (KJS::Bindings::Instance::setCurrentGlobalObject): Added.
        (KJS::Bindings::Instance::currentGlobalObject): Added.
        (KJS::Bindings::Instance::begin):
        (KJS::Bindings::Instance::end):
        * bridge/runtime.h:
        (KJS::Bindings::Instance::virtualBegin): Renamed from begin().
        (KJS::Bindings::Instance::virtualEnd): Renamed from end().
        We now store the currently active globalObject everytime we cross the runtime
        object boundary.  To do this, we take advantage of the existing begin/end
        methods that are called when crossing this boundary, making begin set the current
        globalObject and then call the old begin, now called virtualBegin.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@31167 268f45cc-cd09-0410-ab3c-d52691b4dbfc